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setup-python/node_modules/@babel/parser/lib/index.js

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Initial pass
2019-06-27 03:12:00 +02:00
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
const beforeExpr = true;
const startsExpr = true;
const isLoop = true;
const isAssign = true;
const prefix = true;
const postfix = true;
class TokenType {
constructor(label, conf = {}) {
this.label = label;
this.keyword = conf.keyword;
this.beforeExpr = !!conf.beforeExpr;
this.startsExpr = !!conf.startsExpr;
this.rightAssociative = !!conf.rightAssociative;
this.isLoop = !!conf.isLoop;
this.isAssign = !!conf.isAssign;
this.prefix = !!conf.prefix;
this.postfix = !!conf.postfix;
this.binop = conf.binop != null ? conf.binop : null;
this.updateContext = null;
}
}
const keywords = new Map();
function createKeyword(name, options = {}) {
options.keyword = name;
const token = new TokenType(name, options);
keywords.set(name, token);
return token;
}
function createBinop(name, binop) {
return new TokenType(name, {
beforeExpr,
binop
});
}
const types = {
num: new TokenType("num", {
startsExpr
}),
bigint: new TokenType("bigint", {
startsExpr
}),
regexp: new TokenType("regexp", {
startsExpr
}),
string: new TokenType("string", {
startsExpr
}),
name: new TokenType("name", {
startsExpr
}),
eof: new TokenType("eof"),
bracketL: new TokenType("[", {
beforeExpr,
startsExpr
}),
bracketR: new TokenType("]"),
braceL: new TokenType("{", {
beforeExpr,
startsExpr
}),
braceBarL: new TokenType("{|", {
beforeExpr,
startsExpr
}),
braceR: new TokenType("}"),
braceBarR: new TokenType("|}"),
parenL: new TokenType("(", {
beforeExpr,
startsExpr
}),
parenR: new TokenType(")"),
comma: new TokenType(",", {
beforeExpr
}),
semi: new TokenType(";", {
beforeExpr
}),
colon: new TokenType(":", {
beforeExpr
}),
doubleColon: new TokenType("::", {
beforeExpr
}),
dot: new TokenType("."),
question: new TokenType("?", {
beforeExpr
}),
questionDot: new TokenType("?."),
arrow: new TokenType("=>", {
beforeExpr
}),
template: new TokenType("template"),
ellipsis: new TokenType("...", {
beforeExpr
}),
backQuote: new TokenType("`", {
startsExpr
}),
dollarBraceL: new TokenType("${", {
beforeExpr,
startsExpr
}),
at: new TokenType("@"),
hash: new TokenType("#", {
startsExpr
}),
interpreterDirective: new TokenType("#!..."),
eq: new TokenType("=", {
beforeExpr,
isAssign
}),
assign: new TokenType("_=", {
beforeExpr,
isAssign
}),
incDec: new TokenType("++/--", {
prefix,
postfix,
startsExpr
}),
bang: new TokenType("!", {
beforeExpr,
prefix,
startsExpr
}),
tilde: new TokenType("~", {
beforeExpr,
prefix,
startsExpr
}),
pipeline: createBinop("|>", 0),
nullishCoalescing: createBinop("??", 1),
logicalOR: createBinop("||", 1),
logicalAND: createBinop("&&", 2),
bitwiseOR: createBinop("|", 3),
bitwiseXOR: createBinop("^", 4),
bitwiseAND: createBinop("&", 5),
equality: createBinop("==/!=/===/!==", 6),
relational: createBinop("</>/<=/>=", 7),
bitShift: createBinop("<</>>/>>>", 8),
plusMin: new TokenType("+/-", {
beforeExpr,
binop: 9,
prefix,
startsExpr
}),
modulo: createBinop("%", 10),
star: createBinop("*", 10),
slash: createBinop("/", 10),
exponent: new TokenType("**", {
beforeExpr,
binop: 11,
rightAssociative: true
}),
_break: createKeyword("break"),
_case: createKeyword("case", {
beforeExpr
}),
_catch: createKeyword("catch"),
_continue: createKeyword("continue"),
_debugger: createKeyword("debugger"),
_default: createKeyword("default", {
beforeExpr
}),
_do: createKeyword("do", {
isLoop,
beforeExpr
}),
_else: createKeyword("else", {
beforeExpr
}),
_finally: createKeyword("finally"),
_for: createKeyword("for", {
isLoop
}),
_function: createKeyword("function", {
startsExpr
}),
_if: createKeyword("if"),
_return: createKeyword("return", {
beforeExpr
}),
_switch: createKeyword("switch"),
_throw: createKeyword("throw", {
beforeExpr,
prefix,
startsExpr
}),
_try: createKeyword("try"),
_var: createKeyword("var"),
_const: createKeyword("const"),
_while: createKeyword("while", {
isLoop
}),
_with: createKeyword("with"),
_new: createKeyword("new", {
beforeExpr,
startsExpr
}),
_this: createKeyword("this", {
startsExpr
}),
_super: createKeyword("super", {
startsExpr
}),
_class: createKeyword("class", {
startsExpr
}),
_extends: createKeyword("extends", {
beforeExpr
}),
_export: createKeyword("export"),
_import: createKeyword("import", {
startsExpr
}),
_null: createKeyword("null", {
startsExpr
}),
_true: createKeyword("true", {
startsExpr
}),
_false: createKeyword("false", {
startsExpr
}),
_in: createKeyword("in", {
beforeExpr,
binop: 7
}),
_instanceof: createKeyword("instanceof", {
beforeExpr,
binop: 7
}),
_typeof: createKeyword("typeof", {
beforeExpr,
prefix,
startsExpr
}),
_void: createKeyword("void", {
beforeExpr,
prefix,
startsExpr
}),
_delete: createKeyword("delete", {
beforeExpr,
prefix,
startsExpr
})
};
const SCOPE_OTHER = 0b000000000,
SCOPE_PROGRAM = 0b000000001,
SCOPE_FUNCTION = 0b000000010,
SCOPE_ASYNC = 0b000000100,
SCOPE_GENERATOR = 0b000001000,
SCOPE_ARROW = 0b000010000,
SCOPE_SIMPLE_CATCH = 0b000100000,
SCOPE_SUPER = 0b001000000,
SCOPE_DIRECT_SUPER = 0b010000000,
SCOPE_CLASS = 0b100000000,
SCOPE_VAR = SCOPE_PROGRAM | SCOPE_FUNCTION;
function functionFlags(isAsync, isGenerator) {
return SCOPE_FUNCTION | (isAsync ? SCOPE_ASYNC : 0) | (isGenerator ? SCOPE_GENERATOR : 0);
}
const BIND_KIND_VALUE = 0b00000000001,
BIND_KIND_TYPE = 0b00000000010,
BIND_SCOPE_VAR = 0b00000000100,
BIND_SCOPE_LEXICAL = 0b00000001000,
BIND_SCOPE_FUNCTION = 0b00000010000,
BIND_FLAGS_NONE = 0b00001000000,
BIND_FLAGS_CLASS = 0b00010000000,
BIND_FLAGS_TS_ENUM = 0b00100000000,
BIND_FLAGS_TS_CONST_ENUM = 0b01000000000,
BIND_FLAGS_TS_EXPORT_ONLY = 0b10000000000;
const BIND_CLASS = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_CLASS,
BIND_LEXICAL = BIND_KIND_VALUE | 0 | BIND_SCOPE_LEXICAL | 0,
BIND_VAR = BIND_KIND_VALUE | 0 | BIND_SCOPE_VAR | 0,
BIND_FUNCTION = BIND_KIND_VALUE | 0 | BIND_SCOPE_FUNCTION | 0,
BIND_TS_INTERFACE = 0 | BIND_KIND_TYPE | 0 | BIND_FLAGS_CLASS,
BIND_TS_TYPE = 0 | BIND_KIND_TYPE | 0 | 0,
BIND_TS_ENUM = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_TS_ENUM,
BIND_TS_FN_TYPE = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
BIND_NONE = 0 | 0 | 0 | BIND_FLAGS_NONE,
BIND_OUTSIDE = BIND_KIND_VALUE | 0 | 0 | BIND_FLAGS_NONE,
BIND_TS_CONST_ENUM = BIND_TS_ENUM | BIND_FLAGS_TS_CONST_ENUM,
BIND_TS_NAMESPACE = BIND_TS_FN_TYPE;
function isSimpleProperty(node) {
return node != null && node.type === "Property" && node.kind === "init" && node.method === false;
}
var estree = (superClass => class extends superClass {
estreeParseRegExpLiteral({
pattern,
flags
}) {
let regex = null;
try {
regex = new RegExp(pattern, flags);
} catch (e) {}
const node = this.estreeParseLiteral(regex);
node.regex = {
pattern,
flags
};
return node;
}
estreeParseLiteral(value) {
return this.parseLiteral(value, "Literal");
}
directiveToStmt(directive) {
const directiveLiteral = directive.value;
const stmt = this.startNodeAt(directive.start, directive.loc.start);
const expression = this.startNodeAt(directiveLiteral.start, directiveLiteral.loc.start);
expression.value = directiveLiteral.value;
expression.raw = directiveLiteral.extra.raw;
stmt.expression = this.finishNodeAt(expression, "Literal", directiveLiteral.end, directiveLiteral.loc.end);
stmt.directive = directiveLiteral.extra.raw.slice(1, -1);
return this.finishNodeAt(stmt, "ExpressionStatement", directive.end, directive.loc.end);
}
initFunction(node, isAsync) {
super.initFunction(node, isAsync);
node.expression = false;
}
checkDeclaration(node) {
if (isSimpleProperty(node)) {
this.checkDeclaration(node.value);
} else {
super.checkDeclaration(node);
}
}
checkGetterSetterParams(method) {
const prop = method;
const paramCount = prop.kind === "get" ? 0 : 1;
const start = prop.start;
if (prop.value.params.length !== paramCount) {
if (prop.kind === "get") {
this.raise(start, "getter must not have any formal parameters");
} else {
this.raise(start, "setter must have exactly one formal parameter");
}
}
if (prop.kind === "set" && prop.value.params[0].type === "RestElement") {
this.raise(start, "setter function argument must not be a rest parameter");
}
}
checkLVal(expr, bindingType = BIND_NONE, checkClashes, contextDescription) {
switch (expr.type) {
case "ObjectPattern":
expr.properties.forEach(prop => {
this.checkLVal(prop.type === "Property" ? prop.value : prop, bindingType, checkClashes, "object destructuring pattern");
});
break;
default:
super.checkLVal(expr, bindingType, checkClashes, contextDescription);
}
}
checkPropClash(prop, propHash) {
if (prop.type === "SpreadElement" || prop.computed || prop.method || prop.shorthand) {
return;
}
const key = prop.key;
const name = key.type === "Identifier" ? key.name : String(key.value);
if (name === "__proto__" && prop.kind === "init") {
if (propHash.proto) {
this.raise(key.start, "Redefinition of __proto__ property");
}
propHash.proto = true;
}
}
isStrictBody(node) {
const isBlockStatement = node.body.type === "BlockStatement";
if (isBlockStatement && node.body.body.length > 0) {
for (let _i = 0, _node$body$body = node.body.body; _i < _node$body$body.length; _i++) {
const directive = _node$body$body[_i];
if (directive.type === "ExpressionStatement" && directive.expression.type === "Literal") {
if (directive.expression.value === "use strict") return true;
} else {
break;
}
}
}
return false;
}
isValidDirective(stmt) {
return stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && typeof stmt.expression.value === "string" && (!stmt.expression.extra || !stmt.expression.extra.parenthesized);
}
stmtToDirective(stmt) {
const directive = super.stmtToDirective(stmt);
const value = stmt.expression.value;
directive.value.value = value;
return directive;
}
parseBlockBody(node, allowDirectives, topLevel, end) {
super.parseBlockBody(node, allowDirectives, topLevel, end);
const directiveStatements = node.directives.map(d => this.directiveToStmt(d));
node.body = directiveStatements.concat(node.body);
delete node.directives;
}
pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true);
if (method.typeParameters) {
method.value.typeParameters = method.typeParameters;
delete method.typeParameters;
}
classBody.body.push(method);
}
parseExprAtom(refShorthandDefaultPos) {
switch (this.state.type) {
case types.regexp:
return this.estreeParseRegExpLiteral(this.state.value);
case types.num:
case types.string:
return this.estreeParseLiteral(this.state.value);
case types._null:
return this.estreeParseLiteral(null);
case types._true:
return this.estreeParseLiteral(true);
case types._false:
return this.estreeParseLiteral(false);
default:
return super.parseExprAtom(refShorthandDefaultPos);
}
}
parseLiteral(value, type, startPos, startLoc) {
const node = super.parseLiteral(value, type, startPos, startLoc);
node.raw = node.extra.raw;
delete node.extra;
return node;
}
parseFunctionBody(node, allowExpression, isMethod = false) {
super.parseFunctionBody(node, allowExpression, isMethod);
node.expression = node.body.type !== "BlockStatement";
}
parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
let funcNode = this.startNode();
funcNode.kind = node.kind;
funcNode = super.parseMethod(funcNode, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope);
funcNode.type = "FunctionExpression";
delete funcNode.kind;
node.value = funcNode;
type = type === "ClassMethod" ? "MethodDefinition" : type;
return this.finishNode(node, type);
}
parseObjectMethod(prop, isGenerator, isAsync, isPattern, containsEsc) {
const node = super.parseObjectMethod(prop, isGenerator, isAsync, isPattern, containsEsc);
if (node) {
node.type = "Property";
if (node.kind === "method") node.kind = "init";
node.shorthand = false;
}
return node;
}
parseObjectProperty(prop, startPos, startLoc, isPattern, refShorthandDefaultPos) {
const node = super.parseObjectProperty(prop, startPos, startLoc, isPattern, refShorthandDefaultPos);
if (node) {
node.kind = "init";
node.type = "Property";
}
return node;
}
toAssignable(node, isBinding, contextDescription) {
if (isSimpleProperty(node)) {
this.toAssignable(node.value, isBinding, contextDescription);
return node;
}
return super.toAssignable(node, isBinding, contextDescription);
}
toAssignableObjectExpressionProp(prop, isBinding, isLast) {
if (prop.kind === "get" || prop.kind === "set") {
this.raise(prop.key.start, "Object pattern can't contain getter or setter");
} else if (prop.method) {
this.raise(prop.key.start, "Object pattern can't contain methods");
} else {
super.toAssignableObjectExpressionProp(prop, isBinding, isLast);
}
}
});
const lineBreak = /\r\n?|[\n\u2028\u2029]/;
const lineBreakG = new RegExp(lineBreak.source, "g");
function isNewLine(code) {
switch (code) {
case 10:
case 13:
case 8232:
case 8233:
return true;
default:
return false;
}
}
const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
function isWhitespace(code) {
switch (code) {
case 0x0009:
case 0x000b:
case 0x000c:
case 32:
case 160:
case 5760:
case 0x2000:
case 0x2001:
case 0x2002:
case 0x2003:
case 0x2004:
case 0x2005:
case 0x2006:
case 0x2007:
case 0x2008:
case 0x2009:
case 0x200a:
case 0x202f:
case 0x205f:
case 0x3000:
case 0xfeff:
return true;
default:
return false;
}
}
class TokContext {
constructor(token, isExpr, preserveSpace, override) {
this.token = token;
this.isExpr = !!isExpr;
this.preserveSpace = !!preserveSpace;
this.override = override;
}
}
const types$1 = {
braceStatement: new TokContext("{", false),
braceExpression: new TokContext("{", true),
templateQuasi: new TokContext("${", false),
parenStatement: new TokContext("(", false),
parenExpression: new TokContext("(", true),
template: new TokContext("`", true, true, p => p.readTmplToken()),
functionExpression: new TokContext("function", true),
functionStatement: new TokContext("function", false)
};
types.parenR.updateContext = types.braceR.updateContext = function () {
if (this.state.context.length === 1) {
this.state.exprAllowed = true;
return;
}
let out = this.state.context.pop();
if (out === types$1.braceStatement && this.curContext().token === "function") {
out = this.state.context.pop();
}
this.state.exprAllowed = !out.isExpr;
};
types.name.updateContext = function (prevType) {
let allowed = false;
if (prevType !== types.dot) {
if (this.state.value === "of" && !this.state.exprAllowed || this.state.value === "yield" && this.scope.inGenerator) {
allowed = true;
}
}
this.state.exprAllowed = allowed;
if (this.state.isIterator) {
this.state.isIterator = false;
}
};
types.braceL.updateContext = function (prevType) {
this.state.context.push(this.braceIsBlock(prevType) ? types$1.braceStatement : types$1.braceExpression);
this.state.exprAllowed = true;
};
types.dollarBraceL.updateContext = function () {
this.state.context.push(types$1.templateQuasi);
this.state.exprAllowed = true;
};
types.parenL.updateContext = function (prevType) {
const statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
this.state.context.push(statementParens ? types$1.parenStatement : types$1.parenExpression);
this.state.exprAllowed = true;
};
types.incDec.updateContext = function () {};
types._function.updateContext = types._class.updateContext = function (prevType) {
if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else && !(prevType === types._return && lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start))) && !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat)) {
this.state.context.push(types$1.functionExpression);
} else {
this.state.context.push(types$1.functionStatement);
}
this.state.exprAllowed = false;
};
types.backQuote.updateContext = function () {
if (this.curContext() === types$1.template) {
this.state.context.pop();
} else {
this.state.context.push(types$1.template);
}
this.state.exprAllowed = false;
};
const reservedWords = {
strict: ["implements", "interface", "let", "package", "private", "protected", "public", "static", "yield"],
strictBind: ["eval", "arguments"]
};
const reservedWordsStrictSet = new Set(reservedWords.strict);
const reservedWordsStrictBindSet = new Set(reservedWords.strict.concat(reservedWords.strictBind));
const isReservedWord = (word, inModule) => {
return inModule && word === "await" || word === "enum";
};
function isStrictReservedWord(word, inModule) {
return isReservedWord(word, inModule) || reservedWordsStrictSet.has(word);
}
function isStrictBindReservedWord(word, inModule) {
return isReservedWord(word, inModule) || reservedWordsStrictBindSet.has(word);
}
function isKeyword(word) {
return keywords.has(word);
}
const keywordRelationalOperator = /^in(stanceof)?$/;
let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7c6\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab67\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-
let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
const astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39, 9, 51, 157, 310, 10, 21, 11, 7, 153, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14, 50, 14, 35, 477, 28, 11, 0, 9, 21, 155, 22, 13, 52, 76, 44, 33, 24, 27, 35, 30, 0, 12, 34, 4, 0, 13, 47, 15, 3, 22, 0, 2, 0, 36, 17, 2, 24, 85, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 159, 52, 19, 3, 21, 0, 33, 47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 230, 43, 117, 63, 32, 0, 161, 7, 3, 38, 17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 35, 56, 264, 8, 2, 36, 18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18, 270, 921, 103, 110, 18, 195, 2749, 1070, 4050, 582, 8634, 568, 8, 30, 114, 29, 19, 47, 17, 3, 32, 20, 6, 18, 689, 63, 129, 74, 6, 0, 67, 12, 65, 1, 2, 0, 29, 6135, 9, 754, 9486, 286, 50, 2, 18, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 2357, 44, 11, 6, 17, 0, 370, 43, 1301, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42710, 42, 4148, 12, 221, 3, 5761, 15, 7472, 3104, 541];
const astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574, 3, 9, 9, 525, 10, 176, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 4, 9, 83, 11, 7, 0, 161, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 193, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9, 82, 12, 9, 9, 84, 14, 5, 9, 243, 14, 166, 9, 232, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 406, 7, 2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1, 2, 4, 9, 9, 330, 3, 19306, 9, 135, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8, 3, 19723, 1, 5319, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16, 3, 6, 2, 1, 2, 4, 262, 6, 10, 9, 419, 13, 1495, 6, 110, 6, 6, 9, 792487, 239];
function isInAstralSet(code, set) {
let pos = 0x10000;
for (let i = 0, length = set.length; i < length; i += 2) {
pos += set[i];
if (pos > code) return false;
pos += set[i + 1];
if (pos >= code) return true;
}
return false;
}
function isIdentifierStart(code) {
if (code < 65) return code === 36;
if (code <= 90) return true;
if (code < 97) return code === 95;
if (code <= 122) return true;
if (code <= 0xffff) {
return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code));
}
return isInAstralSet(code, astralIdentifierStartCodes);
}
function isIteratorStart(current, next) {
return current === 64 && next === 64;
}
function isIdentifierChar(code) {
if (code < 48) return code === 36;
if (code < 58) return true;
if (code < 65) return false;
if (code <= 90) return true;
if (code < 97) return code === 95;
if (code <= 122) return true;
if (code <= 0xffff) {
return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
}
return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes);
}
const reservedTypes = ["any", "bool", "boolean", "empty", "false", "mixed", "null", "number", "static", "string", "true", "typeof", "void", "interface", "extends", "_"];
function isEsModuleType(bodyElement) {
return bodyElement.type === "DeclareExportAllDeclaration" || bodyElement.type === "DeclareExportDeclaration" && (!bodyElement.declaration || bodyElement.declaration.type !== "TypeAlias" && bodyElement.declaration.type !== "InterfaceDeclaration");
}
function hasTypeImportKind(node) {
return node.importKind === "type" || node.importKind === "typeof";
}
function isMaybeDefaultImport(state) {
return (state.type === types.name || !!state.type.keyword) && state.value !== "from";
}
const exportSuggestions = {
const: "declare export var",
let: "declare export var",
type: "export type",
interface: "export interface"
};
function partition(list, test) {
const list1 = [];
const list2 = [];
for (let i = 0; i < list.length; i++) {
(test(list[i], i, list) ? list1 : list2).push(list[i]);
}
return [list1, list2];
}
const FLOW_PRAGMA_REGEX = /\*?\s*@((?:no)?flow)\b/;
var flow = (superClass => class extends superClass {
constructor(options, input) {
super(options, input);
this.flowPragma = undefined;
}
shouldParseTypes() {
return this.getPluginOption("flow", "all") || this.flowPragma === "flow";
}
finishToken(type, val) {
if (type !== types.string && type !== types.semi && type !== types.interpreterDirective) {
if (this.flowPragma === undefined) {
this.flowPragma = null;
}
}
return super.finishToken(type, val);
}
addComment(comment) {
if (this.flowPragma === undefined) {
const matches = FLOW_PRAGMA_REGEX.exec(comment.value);
if (!matches) ; else if (matches[1] === "flow") {
this.flowPragma = "flow";
} else if (matches[1] === "noflow") {
this.flowPragma = "noflow";
} else {
throw new Error("Unexpected flow pragma");
}
}
return super.addComment(comment);
}
flowParseTypeInitialiser(tok) {
const oldInType = this.state.inType;
this.state.inType = true;
this.expect(tok || types.colon);
const type = this.flowParseType();
this.state.inType = oldInType;
return type;
}
flowParsePredicate() {
const node = this.startNode();
const moduloLoc = this.state.startLoc;
const moduloPos = this.state.start;
this.expect(types.modulo);
const checksLoc = this.state.startLoc;
this.expectContextual("checks");
if (moduloLoc.line !== checksLoc.line || moduloLoc.column !== checksLoc.column - 1) {
this.raise(moduloPos, "Spaces between ´%´ and ´checks´ are not allowed here.");
}
if (this.eat(types.parenL)) {
node.value = this.parseExpression();
this.expect(types.parenR);
return this.finishNode(node, "DeclaredPredicate");
} else {
return this.finishNode(node, "InferredPredicate");
}
}
flowParseTypeAndPredicateInitialiser() {
const oldInType = this.state.inType;
this.state.inType = true;
this.expect(types.colon);
let type = null;
let predicate = null;
if (this.match(types.modulo)) {
this.state.inType = oldInType;
predicate = this.flowParsePredicate();
} else {
type = this.flowParseType();
this.state.inType = oldInType;
if (this.match(types.modulo)) {
predicate = this.flowParsePredicate();
}
}
return [type, predicate];
}
flowParseDeclareClass(node) {
this.next();
this.flowParseInterfaceish(node, true);
return this.finishNode(node, "DeclareClass");
}
flowParseDeclareFunction(node) {
this.next();
const id = node.id = this.parseIdentifier();
const typeNode = this.startNode();
const typeContainer = this.startNode();
if (this.isRelational("<")) {
typeNode.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
typeNode.typeParameters = null;
}
this.expect(types.parenL);
const tmp = this.flowParseFunctionTypeParams();
typeNode.params = tmp.params;
typeNode.rest = tmp.rest;
this.expect(types.parenR);
[typeNode.returnType, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
typeContainer.typeAnnotation = this.finishNode(typeNode, "FunctionTypeAnnotation");
id.typeAnnotation = this.finishNode(typeContainer, "TypeAnnotation");
this.resetEndLocation(id);
this.semicolon();
return this.finishNode(node, "DeclareFunction");
}
flowParseDeclare(node, insideModule) {
if (this.match(types._class)) {
return this.flowParseDeclareClass(node);
} else if (this.match(types._function)) {
return this.flowParseDeclareFunction(node);
} else if (this.match(types._var)) {
return this.flowParseDeclareVariable(node);
} else if (this.eatContextual("module")) {
if (this.match(types.dot)) {
return this.flowParseDeclareModuleExports(node);
} else {
if (insideModule) {
this.unexpected(this.state.lastTokStart, "`declare module` cannot be used inside another `declare module`");
}
return this.flowParseDeclareModule(node);
}
} else if (this.isContextual("type")) {
return this.flowParseDeclareTypeAlias(node);
} else if (this.isContextual("opaque")) {
return this.flowParseDeclareOpaqueType(node);
} else if (this.isContextual("interface")) {
return this.flowParseDeclareInterface(node);
} else if (this.match(types._export)) {
return this.flowParseDeclareExportDeclaration(node, insideModule);
} else {
throw this.unexpected();
}
}
flowParseDeclareVariable(node) {
this.next();
node.id = this.flowParseTypeAnnotatableIdentifier(true);
this.semicolon();
return this.finishNode(node, "DeclareVariable");
}
flowParseDeclareModule(node) {
this.scope.enter(SCOPE_OTHER);
if (this.match(types.string)) {
node.id = this.parseExprAtom();
} else {
node.id = this.parseIdentifier();
}
const bodyNode = node.body = this.startNode();
const body = bodyNode.body = [];
this.expect(types.braceL);
while (!this.match(types.braceR)) {
let bodyNode = this.startNode();
if (this.match(types._import)) {
this.next();
if (!this.isContextual("type") && !this.isContextual("typeof")) {
this.unexpected(this.state.lastTokStart, "Imports within a `declare module` body must always be `import type` or `import typeof`");
}
this.parseImport(bodyNode);
} else {
this.expectContextual("declare", "Only declares and type imports are allowed inside declare module");
bodyNode = this.flowParseDeclare(bodyNode, true);
}
body.push(bodyNode);
}
this.scope.exit();
this.expect(types.braceR);
this.finishNode(bodyNode, "BlockStatement");
let kind = null;
let hasModuleExport = false;
const errorMessage = "Found both `declare module.exports` and `declare export` in the same module. " + "Modules can only have 1 since they are either an ES module or they are a CommonJS module";
body.forEach(bodyElement => {
if (isEsModuleType(bodyElement)) {
if (kind === "CommonJS") {
this.unexpected(bodyElement.start, errorMessage);
}
kind = "ES";
} else if (bodyElement.type === "DeclareModuleExports") {
if (hasModuleExport) {
this.unexpected(bodyElement.start, "Duplicate `declare module.exports` statement");
}
if (kind === "ES") this.unexpected(bodyElement.start, errorMessage);
kind = "CommonJS";
hasModuleExport = true;
}
});
node.kind = kind || "CommonJS";
return this.finishNode(node, "DeclareModule");
}
flowParseDeclareExportDeclaration(node, insideModule) {
this.expect(types._export);
if (this.eat(types._default)) {
if (this.match(types._function) || this.match(types._class)) {
node.declaration = this.flowParseDeclare(this.startNode());
} else {
node.declaration = this.flowParseType();
this.semicolon();
}
node.default = true;
return this.finishNode(node, "DeclareExportDeclaration");
} else {
if (this.match(types._const) || this.isLet() || (this.isContextual("type") || this.isContextual("interface")) && !insideModule) {
const label = this.state.value;
const suggestion = exportSuggestions[label];
this.unexpected(this.state.start, `\`declare export ${label}\` is not supported. Use \`${suggestion}\` instead`);
}
if (this.match(types._var) || this.match(types._function) || this.match(types._class) || this.isContextual("opaque")) {
node.declaration = this.flowParseDeclare(this.startNode());
node.default = false;
return this.finishNode(node, "DeclareExportDeclaration");
} else if (this.match(types.star) || this.match(types.braceL) || this.isContextual("interface") || this.isContextual("type") || this.isContextual("opaque")) {
node = this.parseExport(node);
if (node.type === "ExportNamedDeclaration") {
node.type = "ExportDeclaration";
node.default = false;
delete node.exportKind;
}
node.type = "Declare" + node.type;
return node;
}
}
throw this.unexpected();
}
flowParseDeclareModuleExports(node) {
this.next();
this.expectContextual("exports");
node.typeAnnotation = this.flowParseTypeAnnotation();
this.semicolon();
return this.finishNode(node, "DeclareModuleExports");
}
flowParseDeclareTypeAlias(node) {
this.next();
this.flowParseTypeAlias(node);
node.type = "DeclareTypeAlias";
return node;
}
flowParseDeclareOpaqueType(node) {
this.next();
this.flowParseOpaqueType(node, true);
node.type = "DeclareOpaqueType";
return node;
}
flowParseDeclareInterface(node) {
this.next();
this.flowParseInterfaceish(node);
return this.finishNode(node, "DeclareInterface");
}
flowParseInterfaceish(node, isClass = false) {
node.id = this.flowParseRestrictedIdentifier(!isClass);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.extends = [];
node.implements = [];
node.mixins = [];
if (this.eat(types._extends)) {
do {
node.extends.push(this.flowParseInterfaceExtends());
} while (!isClass && this.eat(types.comma));
}
if (this.isContextual("mixins")) {
this.next();
do {
node.mixins.push(this.flowParseInterfaceExtends());
} while (this.eat(types.comma));
}
if (this.isContextual("implements")) {
this.next();
do {
node.implements.push(this.flowParseInterfaceExtends());
} while (this.eat(types.comma));
}
node.body = this.flowParseObjectType({
allowStatic: isClass,
allowExact: false,
allowSpread: false,
allowProto: isClass,
allowInexact: false
});
}
flowParseInterfaceExtends() {
const node = this.startNode();
node.id = this.flowParseQualifiedTypeIdentifier();
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
} else {
node.typeParameters = null;
}
return this.finishNode(node, "InterfaceExtends");
}
flowParseInterface(node) {
this.flowParseInterfaceish(node);
return this.finishNode(node, "InterfaceDeclaration");
}
checkNotUnderscore(word) {
if (word === "_") {
throw this.unexpected(null, "`_` is only allowed as a type argument to call or new");
}
}
checkReservedType(word, startLoc) {
if (reservedTypes.indexOf(word) > -1) {
this.raise(startLoc, `Cannot overwrite reserved type ${word}`);
}
}
flowParseRestrictedIdentifier(liberal) {
this.checkReservedType(this.state.value, this.state.start);
return this.parseIdentifier(liberal);
}
flowParseTypeAlias(node) {
node.id = this.flowParseRestrictedIdentifier();
this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.right = this.flowParseTypeInitialiser(types.eq);
this.semicolon();
return this.finishNode(node, "TypeAlias");
}
flowParseOpaqueType(node, declare) {
this.expectContextual("type");
node.id = this.flowParseRestrictedIdentifier(true);
this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.supertype = null;
if (this.match(types.colon)) {
node.supertype = this.flowParseTypeInitialiser(types.colon);
}
node.impltype = null;
if (!declare) {
node.impltype = this.flowParseTypeInitialiser(types.eq);
}
this.semicolon();
return this.finishNode(node, "OpaqueType");
}
flowParseTypeParameter(allowDefault = true, requireDefault = false) {
if (!allowDefault && requireDefault) {
throw new Error("Cannot disallow a default value (`allowDefault`) while also requiring it (`requireDefault`).");
}
const nodeStart = this.state.start;
const node = this.startNode();
const variance = this.flowParseVariance();
const ident = this.flowParseTypeAnnotatableIdentifier();
node.name = ident.name;
node.variance = variance;
node.bound = ident.typeAnnotation;
if (this.match(types.eq)) {
if (allowDefault) {
this.eat(types.eq);
node.default = this.flowParseType();
} else {
this.unexpected();
}
} else {
if (requireDefault) {
this.unexpected(nodeStart, "Type parameter declaration needs a default, since a preceding type parameter declaration has a default.");
}
}
return this.finishNode(node, "TypeParameter");
}
flowParseTypeParameterDeclaration(allowDefault = true) {
const oldInType = this.state.inType;
const node = this.startNode();
node.params = [];
this.state.inType = true;
if (this.isRelational("<") || this.match(types.jsxTagStart)) {
this.next();
} else {
this.unexpected();
}
let defaultRequired = false;
do {
const typeParameter = this.flowParseTypeParameter(allowDefault, defaultRequired);
node.params.push(typeParameter);
if (typeParameter.default) {
defaultRequired = true;
}
if (!this.isRelational(">")) {
this.expect(types.comma);
}
} while (!this.isRelational(">"));
this.expectRelational(">");
this.state.inType = oldInType;
return this.finishNode(node, "TypeParameterDeclaration");
}
flowParseTypeParameterInstantiation() {
const node = this.startNode();
const oldInType = this.state.inType;
node.params = [];
this.state.inType = true;
this.expectRelational("<");
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = false;
while (!this.isRelational(">")) {
node.params.push(this.flowParseType());
if (!this.isRelational(">")) {
this.expect(types.comma);
}
}
this.state.noAnonFunctionType = oldNoAnonFunctionType;
this.expectRelational(">");
this.state.inType = oldInType;
return this.finishNode(node, "TypeParameterInstantiation");
}
flowParseTypeParameterInstantiationCallOrNew() {
const node = this.startNode();
const oldInType = this.state.inType;
node.params = [];
this.state.inType = true;
this.expectRelational("<");
while (!this.isRelational(">")) {
node.params.push(this.flowParseTypeOrImplicitInstantiation());
if (!this.isRelational(">")) {
this.expect(types.comma);
}
}
this.expectRelational(">");
this.state.inType = oldInType;
return this.finishNode(node, "TypeParameterInstantiation");
}
flowParseInterfaceType() {
const node = this.startNode();
this.expectContextual("interface");
node.extends = [];
if (this.eat(types._extends)) {
do {
node.extends.push(this.flowParseInterfaceExtends());
} while (this.eat(types.comma));
}
node.body = this.flowParseObjectType({
allowStatic: false,
allowExact: false,
allowSpread: false,
allowProto: false,
allowInexact: false
});
return this.finishNode(node, "InterfaceTypeAnnotation");
}
flowParseObjectPropertyKey() {
return this.match(types.num) || this.match(types.string) ? this.parseExprAtom() : this.parseIdentifier(true);
}
flowParseObjectTypeIndexer(node, isStatic, variance) {
node.static = isStatic;
if (this.lookahead().type === types.colon) {
node.id = this.flowParseObjectPropertyKey();
node.key = this.flowParseTypeInitialiser();
} else {
node.id = null;
node.key = this.flowParseType();
}
this.expect(types.bracketR);
node.value = this.flowParseTypeInitialiser();
node.variance = variance;
return this.finishNode(node, "ObjectTypeIndexer");
}
flowParseObjectTypeInternalSlot(node, isStatic) {
node.static = isStatic;
node.id = this.flowParseObjectPropertyKey();
this.expect(types.bracketR);
this.expect(types.bracketR);
if (this.isRelational("<") || this.match(types.parenL)) {
node.method = true;
node.optional = false;
node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));
} else {
node.method = false;
if (this.eat(types.question)) {
node.optional = true;
}
node.value = this.flowParseTypeInitialiser();
}
return this.finishNode(node, "ObjectTypeInternalSlot");
}
flowParseObjectTypeMethodish(node) {
node.params = [];
node.rest = null;
node.typeParameters = null;
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration(false);
}
this.expect(types.parenL);
while (!this.match(types.parenR) && !this.match(types.ellipsis)) {
node.params.push(this.flowParseFunctionTypeParam());
if (!this.match(types.parenR)) {
this.expect(types.comma);
}
}
if (this.eat(types.ellipsis)) {
node.rest = this.flowParseFunctionTypeParam();
}
this.expect(types.parenR);
node.returnType = this.flowParseTypeInitialiser();
return this.finishNode(node, "FunctionTypeAnnotation");
}
flowParseObjectTypeCallProperty(node, isStatic) {
const valueNode = this.startNode();
node.static = isStatic;
node.value = this.flowParseObjectTypeMethodish(valueNode);
return this.finishNode(node, "ObjectTypeCallProperty");
}
flowParseObjectType({
allowStatic,
allowExact,
allowSpread,
allowProto,
allowInexact
}) {
const oldInType = this.state.inType;
this.state.inType = true;
const nodeStart = this.startNode();
nodeStart.callProperties = [];
nodeStart.properties = [];
nodeStart.indexers = [];
nodeStart.internalSlots = [];
let endDelim;
let exact;
let inexact = false;
if (allowExact && this.match(types.braceBarL)) {
this.expect(types.braceBarL);
endDelim = types.braceBarR;
exact = true;
} else {
this.expect(types.braceL);
endDelim = types.braceR;
exact = false;
}
nodeStart.exact = exact;
while (!this.match(endDelim)) {
let isStatic = false;
let protoStart = null;
const node = this.startNode();
if (allowProto && this.isContextual("proto")) {
const lookahead = this.lookahead();
if (lookahead.type !== types.colon && lookahead.type !== types.question) {
this.next();
protoStart = this.state.start;
allowStatic = false;
}
}
if (allowStatic && this.isContextual("static")) {
const lookahead = this.lookahead();
if (lookahead.type !== types.colon && lookahead.type !== types.question) {
this.next();
isStatic = true;
}
}
const variance = this.flowParseVariance();
if (this.eat(types.bracketL)) {
if (protoStart != null) {
this.unexpected(protoStart);
}
if (this.eat(types.bracketL)) {
if (variance) {
this.unexpected(variance.start);
}
nodeStart.internalSlots.push(this.flowParseObjectTypeInternalSlot(node, isStatic));
} else {
nodeStart.indexers.push(this.flowParseObjectTypeIndexer(node, isStatic, variance));
}
} else if (this.match(types.parenL) || this.isRelational("<")) {
if (protoStart != null) {
this.unexpected(protoStart);
}
if (variance) {
this.unexpected(variance.start);
}
nodeStart.callProperties.push(this.flowParseObjectTypeCallProperty(node, isStatic));
} else {
let kind = "init";
if (this.isContextual("get") || this.isContextual("set")) {
const lookahead = this.lookahead();
if (lookahead.type === types.name || lookahead.type === types.string || lookahead.type === types.num) {
kind = this.state.value;
this.next();
}
}
const propOrInexact = this.flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact);
if (propOrInexact === null) {
inexact = true;
} else {
nodeStart.properties.push(propOrInexact);
}
}
this.flowObjectTypeSemicolon();
}
this.expect(endDelim);
if (allowSpread) {
nodeStart.inexact = inexact;
}
const out = this.finishNode(nodeStart, "ObjectTypeAnnotation");
this.state.inType = oldInType;
return out;
}
flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact) {
if (this.match(types.ellipsis)) {
if (!allowSpread) {
this.unexpected(null, "Spread operator cannot appear in class or interface definitions");
}
if (protoStart != null) {
this.unexpected(protoStart);
}
if (variance) {
this.unexpected(variance.start, "Spread properties cannot have variance");
}
this.expect(types.ellipsis);
const isInexactToken = this.eat(types.comma) || this.eat(types.semi);
if (this.match(types.braceR)) {
if (allowInexact) return null;
this.unexpected(null, "Explicit inexact syntax is only allowed inside inexact objects");
}
if (this.match(types.braceBarR)) {
this.unexpected(null, "Explicit inexact syntax cannot appear inside an explicit exact object type");
}
if (isInexactToken) {
this.unexpected(null, "Explicit inexact syntax must appear at the end of an inexact object");
}
node.argument = this.flowParseType();
return this.finishNode(node, "ObjectTypeSpreadProperty");
} else {
node.key = this.flowParseObjectPropertyKey();
node.static = isStatic;
node.proto = protoStart != null;
node.kind = kind;
let optional = false;
if (this.isRelational("<") || this.match(types.parenL)) {
node.method = true;
if (protoStart != null) {
this.unexpected(protoStart);
}
if (variance) {
this.unexpected(variance.start);
}
node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));
if (kind === "get" || kind === "set") {
this.flowCheckGetterSetterParams(node);
}
} else {
if (kind !== "init") this.unexpected();
node.method = false;
if (this.eat(types.question)) {
optional = true;
}
node.value = this.flowParseTypeInitialiser();
node.variance = variance;
}
node.optional = optional;
return this.finishNode(node, "ObjectTypeProperty");
}
}
flowCheckGetterSetterParams(property) {
const paramCount = property.kind === "get" ? 0 : 1;
const start = property.start;
const length = property.value.params.length + (property.value.rest ? 1 : 0);
if (length !== paramCount) {
if (property.kind === "get") {
this.raise(start, "getter must not have any formal parameters");
} else {
this.raise(start, "setter must have exactly one formal parameter");
}
}
if (property.kind === "set" && property.value.rest) {
this.raise(start, "setter function argument must not be a rest parameter");
}
}
flowObjectTypeSemicolon() {
if (!this.eat(types.semi) && !this.eat(types.comma) && !this.match(types.braceR) && !this.match(types.braceBarR)) {
this.unexpected();
}
}
flowParseQualifiedTypeIdentifier(startPos, startLoc, id) {
startPos = startPos || this.state.start;
startLoc = startLoc || this.state.startLoc;
let node = id || this.parseIdentifier();
while (this.eat(types.dot)) {
const node2 = this.startNodeAt(startPos, startLoc);
node2.qualification = node;
node2.id = this.parseIdentifier();
node = this.finishNode(node2, "QualifiedTypeIdentifier");
}
return node;
}
flowParseGenericType(startPos, startLoc, id) {
const node = this.startNodeAt(startPos, startLoc);
node.typeParameters = null;
node.id = this.flowParseQualifiedTypeIdentifier(startPos, startLoc, id);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
}
return this.finishNode(node, "GenericTypeAnnotation");
}
flowParseTypeofType() {
const node = this.startNode();
this.expect(types._typeof);
node.argument = this.flowParsePrimaryType();
return this.finishNode(node, "TypeofTypeAnnotation");
}
flowParseTupleType() {
const node = this.startNode();
node.types = [];
this.expect(types.bracketL);
while (this.state.pos < this.length && !this.match(types.bracketR)) {
node.types.push(this.flowParseType());
if (this.match(types.bracketR)) break;
this.expect(types.comma);
}
this.expect(types.bracketR);
return this.finishNode(node, "TupleTypeAnnotation");
}
flowParseFunctionTypeParam() {
let name = null;
let optional = false;
let typeAnnotation = null;
const node = this.startNode();
const lh = this.lookahead();
if (lh.type === types.colon || lh.type === types.question) {
name = this.parseIdentifier();
if (this.eat(types.question)) {
optional = true;
}
typeAnnotation = this.flowParseTypeInitialiser();
} else {
typeAnnotation = this.flowParseType();
}
node.name = name;
node.optional = optional;
node.typeAnnotation = typeAnnotation;
return this.finishNode(node, "FunctionTypeParam");
}
reinterpretTypeAsFunctionTypeParam(type) {
const node = this.startNodeAt(type.start, type.loc.start);
node.name = null;
node.optional = false;
node.typeAnnotation = type;
return this.finishNode(node, "FunctionTypeParam");
}
flowParseFunctionTypeParams(params = []) {
let rest = null;
while (!this.match(types.parenR) && !this.match(types.ellipsis)) {
params.push(this.flowParseFunctionTypeParam());
if (!this.match(types.parenR)) {
this.expect(types.comma);
}
}
if (this.eat(types.ellipsis)) {
rest = this.flowParseFunctionTypeParam();
}
return {
params,
rest
};
}
flowIdentToTypeAnnotation(startPos, startLoc, node, id) {
switch (id.name) {
case "any":
return this.finishNode(node, "AnyTypeAnnotation");
case "bool":
case "boolean":
return this.finishNode(node, "BooleanTypeAnnotation");
case "mixed":
return this.finishNode(node, "MixedTypeAnnotation");
case "empty":
return this.finishNode(node, "EmptyTypeAnnotation");
case "number":
return this.finishNode(node, "NumberTypeAnnotation");
case "string":
return this.finishNode(node, "StringTypeAnnotation");
default:
this.checkNotUnderscore(id.name);
return this.flowParseGenericType(startPos, startLoc, id);
}
}
flowParsePrimaryType() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const node = this.startNode();
let tmp;
let type;
let isGroupedType = false;
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
switch (this.state.type) {
case types.name:
if (this.isContextual("interface")) {
return this.flowParseInterfaceType();
}
return this.flowIdentToTypeAnnotation(startPos, startLoc, node, this.parseIdentifier());
case types.braceL:
return this.flowParseObjectType({
allowStatic: false,
allowExact: false,
allowSpread: true,
allowProto: false,
allowInexact: true
});
case types.braceBarL:
return this.flowParseObjectType({
allowStatic: false,
allowExact: true,
allowSpread: true,
allowProto: false,
allowInexact: false
});
case types.bracketL:
return this.flowParseTupleType();
case types.relational:
if (this.state.value === "<") {
node.typeParameters = this.flowParseTypeParameterDeclaration(false);
this.expect(types.parenL);
tmp = this.flowParseFunctionTypeParams();
node.params = tmp.params;
node.rest = tmp.rest;
this.expect(types.parenR);
this.expect(types.arrow);
node.returnType = this.flowParseType();
return this.finishNode(node, "FunctionTypeAnnotation");
}
break;
case types.parenL:
this.next();
if (!this.match(types.parenR) && !this.match(types.ellipsis)) {
if (this.match(types.name)) {
const token = this.lookahead().type;
isGroupedType = token !== types.question && token !== types.colon;
} else {
isGroupedType = true;
}
}
if (isGroupedType) {
this.state.noAnonFunctionType = false;
type = this.flowParseType();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
if (this.state.noAnonFunctionType || !(this.match(types.comma) || this.match(types.parenR) && this.lookahead().type === types.arrow)) {
this.expect(types.parenR);
return type;
} else {
this.eat(types.comma);
}
}
if (type) {
tmp = this.flowParseFunctionTypeParams([this.reinterpretTypeAsFunctionTypeParam(type)]);
} else {
tmp = this.flowParseFunctionTypeParams();
}
node.params = tmp.params;
node.rest = tmp.rest;
this.expect(types.parenR);
this.expect(types.arrow);
node.returnType = this.flowParseType();
node.typeParameters = null;
return this.finishNode(node, "FunctionTypeAnnotation");
case types.string:
return this.parseLiteral(this.state.value, "StringLiteralTypeAnnotation");
case types._true:
case types._false:
node.value = this.match(types._true);
this.next();
return this.finishNode(node, "BooleanLiteralTypeAnnotation");
case types.plusMin:
if (this.state.value === "-") {
this.next();
if (!this.match(types.num)) {
this.unexpected(null, `Unexpected token, expected "number"`);
}
return this.parseLiteral(-this.state.value, "NumberLiteralTypeAnnotation", node.start, node.loc.start);
}
this.unexpected();
case types.num:
return this.parseLiteral(this.state.value, "NumberLiteralTypeAnnotation");
case types._void:
this.next();
return this.finishNode(node, "VoidTypeAnnotation");
case types._null:
this.next();
return this.finishNode(node, "NullLiteralTypeAnnotation");
case types._this:
this.next();
return this.finishNode(node, "ThisTypeAnnotation");
case types.star:
this.next();
return this.finishNode(node, "ExistsTypeAnnotation");
default:
if (this.state.type.keyword === "typeof") {
return this.flowParseTypeofType();
} else if (this.state.type.keyword) {
const label = this.state.type.label;
this.next();
return super.createIdentifier(node, label);
}
}
throw this.unexpected();
}
flowParsePostfixType() {
const startPos = this.state.start,
startLoc = this.state.startLoc;
let type = this.flowParsePrimaryType();
while (this.match(types.bracketL) && !this.canInsertSemicolon()) {
const node = this.startNodeAt(startPos, startLoc);
node.elementType = type;
this.expect(types.bracketL);
this.expect(types.bracketR);
type = this.finishNode(node, "ArrayTypeAnnotation");
}
return type;
}
flowParsePrefixType() {
const node = this.startNode();
if (this.eat(types.question)) {
node.typeAnnotation = this.flowParsePrefixType();
return this.finishNode(node, "NullableTypeAnnotation");
} else {
return this.flowParsePostfixType();
}
}
flowParseAnonFunctionWithoutParens() {
const param = this.flowParsePrefixType();
if (!this.state.noAnonFunctionType && this.eat(types.arrow)) {
const node = this.startNodeAt(param.start, param.loc.start);
node.params = [this.reinterpretTypeAsFunctionTypeParam(param)];
node.rest = null;
node.returnType = this.flowParseType();
node.typeParameters = null;
return this.finishNode(node, "FunctionTypeAnnotation");
}
return param;
}
flowParseIntersectionType() {
const node = this.startNode();
this.eat(types.bitwiseAND);
const type = this.flowParseAnonFunctionWithoutParens();
node.types = [type];
while (this.eat(types.bitwiseAND)) {
node.types.push(this.flowParseAnonFunctionWithoutParens());
}
return node.types.length === 1 ? type : this.finishNode(node, "IntersectionTypeAnnotation");
}
flowParseUnionType() {
const node = this.startNode();
this.eat(types.bitwiseOR);
const type = this.flowParseIntersectionType();
node.types = [type];
while (this.eat(types.bitwiseOR)) {
node.types.push(this.flowParseIntersectionType());
}
return node.types.length === 1 ? type : this.finishNode(node, "UnionTypeAnnotation");
}
flowParseType() {
const oldInType = this.state.inType;
this.state.inType = true;
const type = this.flowParseUnionType();
this.state.inType = oldInType;
this.state.exprAllowed = this.state.exprAllowed || this.state.noAnonFunctionType;
return type;
}
flowParseTypeOrImplicitInstantiation() {
if (this.state.type === types.name && this.state.value === "_") {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const node = this.parseIdentifier();
return this.flowParseGenericType(startPos, startLoc, node);
} else {
return this.flowParseType();
}
}
flowParseTypeAnnotation() {
const node = this.startNode();
node.typeAnnotation = this.flowParseTypeInitialiser();
return this.finishNode(node, "TypeAnnotation");
}
flowParseTypeAnnotatableIdentifier(allowPrimitiveOverride) {
const ident = allowPrimitiveOverride ? this.parseIdentifier() : this.flowParseRestrictedIdentifier();
if (this.match(types.colon)) {
ident.typeAnnotation = this.flowParseTypeAnnotation();
this.resetEndLocation(ident);
}
return ident;
}
typeCastToParameter(node) {
node.expression.typeAnnotation = node.typeAnnotation;
this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
return node.expression;
}
flowParseVariance() {
let variance = null;
if (this.match(types.plusMin)) {
variance = this.startNode();
if (this.state.value === "+") {
variance.kind = "plus";
} else {
variance.kind = "minus";
}
this.next();
this.finishNode(variance, "Variance");
}
return variance;
}
parseFunctionBody(node, allowExpressionBody, isMethod = false) {
if (allowExpressionBody) {
return this.forwardNoArrowParamsConversionAt(node, () => super.parseFunctionBody(node, true, isMethod));
}
return super.parseFunctionBody(node, false, isMethod);
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
if (this.match(types.colon)) {
const typeNode = this.startNode();
[typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
node.returnType = typeNode.typeAnnotation ? this.finishNode(typeNode, "TypeAnnotation") : null;
}
super.parseFunctionBodyAndFinish(node, type, isMethod);
}
parseStatement(context, topLevel) {
if (this.state.strict && this.match(types.name) && this.state.value === "interface") {
const node = this.startNode();
this.next();
return this.flowParseInterface(node);
} else {
const stmt = super.parseStatement(context, topLevel);
if (this.flowPragma === undefined && !this.isValidDirective(stmt)) {
this.flowPragma = null;
}
return stmt;
}
}
parseExpressionStatement(node, expr) {
if (expr.type === "Identifier") {
if (expr.name === "declare") {
if (this.match(types._class) || this.match(types.name) || this.match(types._function) || this.match(types._var) || this.match(types._export)) {
return this.flowParseDeclare(node);
}
} else if (this.match(types.name)) {
if (expr.name === "interface") {
return this.flowParseInterface(node);
} else if (expr.name === "type") {
return this.flowParseTypeAlias(node);
} else if (expr.name === "opaque") {
return this.flowParseOpaqueType(node, false);
}
}
}
return super.parseExpressionStatement(node, expr);
}
shouldParseExportDeclaration() {
return this.isContextual("type") || this.isContextual("interface") || this.isContextual("opaque") || super.shouldParseExportDeclaration();
}
isExportDefaultSpecifier() {
if (this.match(types.name) && (this.state.value === "type" || this.state.value === "interface" || this.state.value === "opaque")) {
return false;
}
return super.isExportDefaultSpecifier();
}
parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos) {
if (!this.match(types.question)) return expr;
if (refNeedsArrowPos) {
const state = this.state.clone();
try {
return super.parseConditional(expr, noIn, startPos, startLoc);
} catch (err) {
if (err instanceof SyntaxError) {
this.state = state;
refNeedsArrowPos.start = err.pos || this.state.start;
return expr;
} else {
throw err;
}
}
}
this.expect(types.question);
const state = this.state.clone();
const originalNoArrowAt = this.state.noArrowAt;
const node = this.startNodeAt(startPos, startLoc);
let {
consequent,
failed
} = this.tryParseConditionalConsequent();
let [valid, invalid] = this.getArrowLikeExpressions(consequent);
if (failed || invalid.length > 0) {
const noArrowAt = [...originalNoArrowAt];
if (invalid.length > 0) {
this.state = state;
this.state.noArrowAt = noArrowAt;
for (let i = 0; i < invalid.length; i++) {
noArrowAt.push(invalid[i].start);
}
({
consequent,
failed
} = this.tryParseConditionalConsequent());
[valid, invalid] = this.getArrowLikeExpressions(consequent);
}
if (failed && valid.length > 1) {
this.raise(state.start, "Ambiguous expression: wrap the arrow functions in parentheses to disambiguate.");
}
if (failed && valid.length === 1) {
this.state = state;
this.state.noArrowAt = noArrowAt.concat(valid[0].start);
({
consequent,
failed
} = this.tryParseConditionalConsequent());
}
this.getArrowLikeExpressions(consequent, true);
}
this.state.noArrowAt = originalNoArrowAt;
this.expect(types.colon);
node.test = expr;
node.consequent = consequent;
node.alternate = this.forwardNoArrowParamsConversionAt(node, () => this.parseMaybeAssign(noIn, undefined, undefined, undefined));
return this.finishNode(node, "ConditionalExpression");
}
tryParseConditionalConsequent() {
this.state.noArrowParamsConversionAt.push(this.state.start);
const consequent = this.parseMaybeAssign();
const failed = !this.match(types.colon);
this.state.noArrowParamsConversionAt.pop();
return {
consequent,
failed
};
}
getArrowLikeExpressions(node, disallowInvalid) {
const stack = [node];
const arrows = [];
while (stack.length !== 0) {
const node = stack.pop();
if (node.type === "ArrowFunctionExpression") {
if (node.typeParameters || !node.returnType) {
this.toAssignableList(node.params, true, "arrow function parameters");
this.scope.enter(functionFlags(false, false) | SCOPE_ARROW);
super.checkParams(node, false, true);
this.scope.exit();
} else {
arrows.push(node);
}
stack.push(node.body);
} else if (node.type === "ConditionalExpression") {
stack.push(node.consequent);
stack.push(node.alternate);
}
}
if (disallowInvalid) {
for (let i = 0; i < arrows.length; i++) {
this.toAssignableList(node.params, true, "arrow function parameters");
}
return [arrows, []];
}
return partition(arrows, node => {
try {
this.toAssignableList(node.params, true, "arrow function parameters");
return true;
} catch (err) {
return false;
}
});
}
forwardNoArrowParamsConversionAt(node, parse) {
let result;
if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
this.state.noArrowParamsConversionAt.push(this.state.start);
result = parse();
this.state.noArrowParamsConversionAt.pop();
} else {
result = parse();
}
return result;
}
parseParenItem(node, startPos, startLoc) {
node = super.parseParenItem(node, startPos, startLoc);
if (this.eat(types.question)) {
node.optional = true;
this.resetEndLocation(node);
}
if (this.match(types.colon)) {
const typeCastNode = this.startNodeAt(startPos, startLoc);
typeCastNode.expression = node;
typeCastNode.typeAnnotation = this.flowParseTypeAnnotation();
return this.finishNode(typeCastNode, "TypeCastExpression");
}
return node;
}
assertModuleNodeAllowed(node) {
if (node.type === "ImportDeclaration" && (node.importKind === "type" || node.importKind === "typeof") || node.type === "ExportNamedDeclaration" && node.exportKind === "type" || node.type === "ExportAllDeclaration" && node.exportKind === "type") {
return;
}
super.assertModuleNodeAllowed(node);
}
parseExport(node) {
const decl = super.parseExport(node);
if (decl.type === "ExportNamedDeclaration" || decl.type === "ExportAllDeclaration") {
decl.exportKind = decl.exportKind || "value";
}
return decl;
}
parseExportDeclaration(node) {
if (this.isContextual("type")) {
node.exportKind = "type";
const declarationNode = this.startNode();
this.next();
if (this.match(types.braceL)) {
node.specifiers = this.parseExportSpecifiers();
this.parseExportFrom(node);
return null;
} else {
return this.flowParseTypeAlias(declarationNode);
}
} else if (this.isContextual("opaque")) {
node.exportKind = "type";
const declarationNode = this.startNode();
this.next();
return this.flowParseOpaqueType(declarationNode, false);
} else if (this.isContextual("interface")) {
node.exportKind = "type";
const declarationNode = this.startNode();
this.next();
return this.flowParseInterface(declarationNode);
} else {
return super.parseExportDeclaration(node);
}
}
eatExportStar(node) {
if (super.eatExportStar(...arguments)) return true;
if (this.isContextual("type") && this.lookahead().type === types.star) {
node.exportKind = "type";
this.next();
this.next();
return true;
}
return false;
}
maybeParseExportNamespaceSpecifier(node) {
const pos = this.state.start;
const hasNamespace = super.maybeParseExportNamespaceSpecifier(node);
if (hasNamespace && node.exportKind === "type") {
this.unexpected(pos);
}
return hasNamespace;
}
parseClassId(node, isStatement, optionalId) {
super.parseClassId(node, isStatement, optionalId);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
}
}
getTokenFromCode(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 123 && next === 124) {
return this.finishOp(types.braceBarL, 2);
} else if (this.state.inType && (code === 62 || code === 60)) {
return this.finishOp(types.relational, 1);
} else if (isIteratorStart(code, next)) {
this.state.isIterator = true;
return super.readWord();
} else {
return super.getTokenFromCode(code);
}
}
toAssignable(node, isBinding, contextDescription) {
if (node.type === "TypeCastExpression") {
return super.toAssignable(this.typeCastToParameter(node), isBinding, contextDescription);
} else {
return super.toAssignable(node, isBinding, contextDescription);
}
}
toAssignableList(exprList, isBinding, contextDescription) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if (expr && expr.type === "TypeCastExpression") {
exprList[i] = this.typeCastToParameter(expr);
}
}
return super.toAssignableList(exprList, isBinding, contextDescription);
}
toReferencedList(exprList, isParenthesizedExpr) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if (expr && expr.type === "TypeCastExpression" && (!expr.extra || !expr.extra.parenthesized) && (exprList.length > 1 || !isParenthesizedExpr)) {
this.raise(expr.typeAnnotation.start, "The type cast expression is expected to be wrapped with parenthesis");
}
}
return exprList;
}
checkLVal(expr, bindingType = BIND_NONE, checkClashes, contextDescription) {
if (expr.type !== "TypeCastExpression") {
return super.checkLVal(expr, bindingType, checkClashes, contextDescription);
}
}
parseClassProperty(node) {
if (this.match(types.colon)) {
node.typeAnnotation = this.flowParseTypeAnnotation();
}
return super.parseClassProperty(node);
}
parseClassPrivateProperty(node) {
if (this.match(types.colon)) {
node.typeAnnotation = this.flowParseTypeAnnotation();
}
return super.parseClassPrivateProperty(node);
}
isClassMethod() {
return this.isRelational("<") || super.isClassMethod();
}
isClassProperty() {
return this.match(types.colon) || super.isClassProperty();
}
isNonstaticConstructor(method) {
return !this.match(types.colon) && super.isNonstaticConstructor(method);
}
pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
if (method.variance) {
this.unexpected(method.variance.start);
}
delete method.variance;
if (this.isRelational("<")) {
method.typeParameters = this.flowParseTypeParameterDeclaration(false);
}
super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
if (method.variance) {
this.unexpected(method.variance.start);
}
delete method.variance;
if (this.isRelational("<")) {
method.typeParameters = this.flowParseTypeParameterDeclaration();
}
super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
}
parseClassSuper(node) {
super.parseClassSuper(node);
if (node.superClass && this.isRelational("<")) {
node.superTypeParameters = this.flowParseTypeParameterInstantiation();
}
if (this.isContextual("implements")) {
this.next();
const implemented = node.implements = [];
do {
const node = this.startNode();
node.id = this.flowParseRestrictedIdentifier(true);
if (this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
} else {
node.typeParameters = null;
}
implemented.push(this.finishNode(node, "ClassImplements"));
} while (this.eat(types.comma));
}
}
parsePropertyName(node) {
const variance = this.flowParseVariance();
const key = super.parsePropertyName(node);
node.variance = variance;
return key;
}
parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos, containsEsc) {
if (prop.variance) {
this.unexpected(prop.variance.start);
}
delete prop.variance;
let typeParameters;
if (this.isRelational("<")) {
typeParameters = this.flowParseTypeParameterDeclaration(false);
if (!this.match(types.parenL)) this.unexpected();
}
super.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos, containsEsc);
if (typeParameters) {
(prop.value || prop).typeParameters = typeParameters;
}
}
parseAssignableListItemTypes(param) {
if (this.eat(types.question)) {
if (param.type !== "Identifier") {
throw this.raise(param.start, "A binding pattern parameter cannot be optional in an implementation signature.");
}
param.optional = true;
}
if (this.match(types.colon)) {
param.typeAnnotation = this.flowParseTypeAnnotation();
}
this.resetEndLocation(param);
return param;
}
parseMaybeDefault(startPos, startLoc, left) {
const node = super.parseMaybeDefault(startPos, startLoc, left);
if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
this.raise(node.typeAnnotation.start, "Type annotations must come before default assignments, " + "e.g. instead of `age = 25: number` use `age: number = 25`");
}
return node;
}
shouldParseDefaultImport(node) {
if (!hasTypeImportKind(node)) {
return super.shouldParseDefaultImport(node);
}
return isMaybeDefaultImport(this.state);
}
parseImportSpecifierLocal(node, specifier, type, contextDescription) {
specifier.local = hasTypeImportKind(node) ? this.flowParseRestrictedIdentifier(true) : this.parseIdentifier();
this.checkLVal(specifier.local, BIND_LEXICAL, undefined, contextDescription);
node.specifiers.push(this.finishNode(specifier, type));
}
maybeParseDefaultImportSpecifier(node) {
node.importKind = "value";
let kind = null;
if (this.match(types._typeof)) {
kind = "typeof";
} else if (this.isContextual("type")) {
kind = "type";
}
if (kind) {
const lh = this.lookahead();
if (kind === "type" && lh.type === types.star) {
this.unexpected(lh.start);
}
if (isMaybeDefaultImport(lh) || lh.type === types.braceL || lh.type === types.star) {
this.next();
node.importKind = kind;
}
}
return super.maybeParseDefaultImportSpecifier(node);
}
parseImportSpecifier(node) {
const specifier = this.startNode();
const firstIdentLoc = this.state.start;
const firstIdent = this.parseIdentifier(true);
let specifierTypeKind = null;
if (firstIdent.name === "type") {
specifierTypeKind = "type";
} else if (firstIdent.name === "typeof") {
specifierTypeKind = "typeof";
}
let isBinding = false;
if (this.isContextual("as") && !this.isLookaheadContextual("as")) {
const as_ident = this.parseIdentifier(true);
if (specifierTypeKind !== null && !this.match(types.name) && !this.state.type.keyword) {
specifier.imported = as_ident;
specifier.importKind = specifierTypeKind;
specifier.local = as_ident.__clone();
} else {
specifier.imported = firstIdent;
specifier.importKind = null;
specifier.local = this.parseIdentifier();
}
} else if (specifierTypeKind !== null && (this.match(types.name) || this.state.type.keyword)) {
specifier.imported = this.parseIdentifier(true);
specifier.importKind = specifierTypeKind;
if (this.eatContextual("as")) {
specifier.local = this.parseIdentifier();
} else {
isBinding = true;
specifier.local = specifier.imported.__clone();
}
} else {
isBinding = true;
specifier.imported = firstIdent;
specifier.importKind = null;
specifier.local = specifier.imported.__clone();
}
const nodeIsTypeImport = hasTypeImportKind(node);
const specifierIsTypeImport = hasTypeImportKind(specifier);
if (nodeIsTypeImport && specifierIsTypeImport) {
this.raise(firstIdentLoc, "The `type` and `typeof` keywords on named imports can only be used on regular " + "`import` statements. It cannot be used with `import type` or `import typeof` statements");
}
if (nodeIsTypeImport || specifierIsTypeImport) {
this.checkReservedType(specifier.local.name, specifier.local.start);
}
if (isBinding && !nodeIsTypeImport && !specifierIsTypeImport) {
this.checkReservedWord(specifier.local.name, specifier.start, true, true);
}
this.checkLVal(specifier.local, BIND_LEXICAL, undefined, "import specifier");
node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"));
}
parseFunctionParams(node, allowModifiers) {
const kind = node.kind;
if (kind !== "get" && kind !== "set" && this.isRelational("<")) {
node.typeParameters = this.flowParseTypeParameterDeclaration(false);
}
super.parseFunctionParams(node, allowModifiers);
}
parseVarId(decl, kind) {
super.parseVarId(decl, kind);
if (this.match(types.colon)) {
decl.id.typeAnnotation = this.flowParseTypeAnnotation();
this.resetEndLocation(decl.id);
}
}
parseAsyncArrowFromCallExpression(node, call) {
if (this.match(types.colon)) {
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = true;
node.returnType = this.flowParseTypeAnnotation();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
}
return super.parseAsyncArrowFromCallExpression(node, call);
}
shouldParseAsyncArrow() {
return this.match(types.colon) || super.shouldParseAsyncArrow();
}
parseMaybeAssign(noIn, refShorthandDefaultPos, afterLeftParse, refNeedsArrowPos) {
let jsxError = null;
if (this.hasPlugin("jsx") && (this.match(types.jsxTagStart) || this.isRelational("<"))) {
const state = this.state.clone();
try {
return super.parseMaybeAssign(noIn, refShorthandDefaultPos, afterLeftParse, refNeedsArrowPos);
} catch (err) {
if (err instanceof SyntaxError) {
this.state = state;
const cLength = this.state.context.length;
if (this.state.context[cLength - 1] === types$1.j_oTag) {
this.state.context.length -= 2;
}
jsxError = err;
} else {
throw err;
}
}
}
if (jsxError != null || this.isRelational("<")) {
let arrowExpression;
let typeParameters;
try {
typeParameters = this.flowParseTypeParameterDeclaration();
arrowExpression = this.forwardNoArrowParamsConversionAt(typeParameters, () => super.parseMaybeAssign(noIn, refShorthandDefaultPos, afterLeftParse, refNeedsArrowPos));
arrowExpression.typeParameters = typeParameters;
this.resetStartLocationFromNode(arrowExpression, typeParameters);
} catch (err) {
throw jsxError || err;
}
if (arrowExpression.type === "ArrowFunctionExpression") {
return arrowExpression;
} else if (jsxError != null) {
throw jsxError;
} else {
this.raise(typeParameters.start, "Expected an arrow function after this type parameter declaration");
}
}
return super.parseMaybeAssign(noIn, refShorthandDefaultPos, afterLeftParse, refNeedsArrowPos);
}
parseArrow(node) {
if (this.match(types.colon)) {
const state = this.state.clone();
try {
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = true;
const typeNode = this.startNode();
[typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
if (this.canInsertSemicolon()) this.unexpected();
if (!this.match(types.arrow)) this.unexpected();
node.returnType = typeNode.typeAnnotation ? this.finishNode(typeNode, "TypeAnnotation") : null;
} catch (err) {
if (err instanceof SyntaxError) {
this.state = state;
} else {
throw err;
}
}
}
return super.parseArrow(node);
}
shouldParseArrow() {
return this.match(types.colon) || super.shouldParseArrow();
}
setArrowFunctionParameters(node, params) {
if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
node.params = params;
} else {
super.setArrowFunctionParameters(node, params);
}
}
checkParams(node, allowDuplicates, isArrowFunction) {
if (isArrowFunction && this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
return;
}
return super.checkParams(node, allowDuplicates, isArrowFunction);
}
parseParenAndDistinguishExpression(canBeArrow) {
return super.parseParenAndDistinguishExpression(canBeArrow && this.state.noArrowAt.indexOf(this.state.start) === -1);
}
parseSubscripts(base, startPos, startLoc, noCalls) {
if (base.type === "Identifier" && base.name === "async" && this.state.noArrowAt.indexOf(startPos) !== -1) {
this.next();
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
base = this.finishNode(node, "CallExpression");
} else if (base.type === "Identifier" && base.name === "async" && this.isRelational("<")) {
const state = this.state.clone();
let error;
try {
const node = this.parseAsyncArrowWithTypeParameters(startPos, startLoc);
if (node) return node;
} catch (e) {
error = e;
}
this.state = state;
try {
return super.parseSubscripts(base, startPos, startLoc, noCalls);
} catch (e) {
throw error || e;
}
}
return super.parseSubscripts(base, startPos, startLoc, noCalls);
}
parseSubscript(base, startPos, startLoc, noCalls, subscriptState, maybeAsyncArrow) {
if (this.match(types.questionDot) && this.isLookaheadRelational("<")) {
this.expectPlugin("optionalChaining");
subscriptState.optionalChainMember = true;
if (noCalls) {
subscriptState.stop = true;
return base;
}
this.next();
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.typeArguments = this.flowParseTypeParameterInstantiation();
this.expect(types.parenL);
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
node.optional = true;
return this.finishNode(node, "OptionalCallExpression");
} else if (!noCalls && this.shouldParseTypes() && this.isRelational("<")) {
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
const state = this.state.clone();
try {
node.typeArguments = this.flowParseTypeParameterInstantiationCallOrNew();
this.expect(types.parenL);
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
if (subscriptState.optionalChainMember) {
node.optional = false;
return this.finishNode(node, "OptionalCallExpression");
}
return this.finishNode(node, "CallExpression");
} catch (e) {
if (e instanceof SyntaxError) {
this.state = state;
} else {
throw e;
}
}
}
return super.parseSubscript(base, startPos, startLoc, noCalls, subscriptState, maybeAsyncArrow);
}
parseNewArguments(node) {
let targs = null;
if (this.shouldParseTypes() && this.isRelational("<")) {
const state = this.state.clone();
try {
targs = this.flowParseTypeParameterInstantiationCallOrNew();
} catch (e) {
if (e instanceof SyntaxError) {
this.state = state;
} else {
throw e;
}
}
}
node.typeArguments = targs;
super.parseNewArguments(node);
}
parseAsyncArrowWithTypeParameters(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
this.parseFunctionParams(node);
if (!this.parseArrow(node)) return;
return this.parseArrowExpression(node, undefined, true);
}
readToken_mult_modulo(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 42 && next === 47 && this.state.hasFlowComment) {
this.state.hasFlowComment = false;
this.state.pos += 2;
this.nextToken();
return;
}
super.readToken_mult_modulo(code);
}
readToken_pipe_amp(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 124 && next === 125) {
this.finishOp(types.braceBarR, 2);
return;
}
super.readToken_pipe_amp(code);
}
parseTopLevel(file, program) {
const fileNode = super.parseTopLevel(file, program);
if (this.state.hasFlowComment) {
this.unexpected(null, "Unterminated flow-comment");
}
return fileNode;
}
skipBlockComment() {
if (this.hasPlugin("flowComments") && this.skipFlowComment()) {
if (this.state.hasFlowComment) {
this.unexpected(null, "Cannot have a flow comment inside another flow comment");
}
this.hasFlowCommentCompletion();
this.state.pos += this.skipFlowComment();
this.state.hasFlowComment = true;
return;
}
if (this.state.hasFlowComment) {
const end = this.input.indexOf("*-/", this.state.pos += 2);
if (end === -1) this.raise(this.state.pos - 2, "Unterminated comment");
this.state.pos = end + 3;
return;
}
super.skipBlockComment();
}
skipFlowComment() {
const {
pos
} = this.state;
let shiftToFirstNonWhiteSpace = 2;
while ([32, 9].includes(this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace))) {
shiftToFirstNonWhiteSpace++;
}
const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1);
if (ch2 === 58 && ch3 === 58) {
return shiftToFirstNonWhiteSpace + 2;
}
if (this.input.slice(shiftToFirstNonWhiteSpace + pos, shiftToFirstNonWhiteSpace + pos + 12) === "flow-include") {
return shiftToFirstNonWhiteSpace + 12;
}
if (ch2 === 58 && ch3 !== 58) {
return shiftToFirstNonWhiteSpace;
}
return false;
}
hasFlowCommentCompletion() {
const end = this.input.indexOf("*/", this.state.pos);
if (end === -1) {
this.raise(this.state.pos, "Unterminated comment");
}
}
});
const entities = {
quot: "\u0022",
amp: "&",
apos: "\u0027",
lt: "<",
gt: ">",
nbsp: "\u00A0",
iexcl: "\u00A1",
cent: "\u00A2",
pound: "\u00A3",
curren: "\u00A4",
yen: "\u00A5",
brvbar: "\u00A6",
sect: "\u00A7",
uml: "\u00A8",
copy: "\u00A9",
ordf: "\u00AA",
laquo: "\u00AB",
not: "\u00AC",
shy: "\u00AD",
reg: "\u00AE",
macr: "\u00AF",
deg: "\u00B0",
plusmn: "\u00B1",
sup2: "\u00B2",
sup3: "\u00B3",
acute: "\u00B4",
micro: "\u00B5",
para: "\u00B6",
middot: "\u00B7",
cedil: "\u00B8",
sup1: "\u00B9",
ordm: "\u00BA",
raquo: "\u00BB",
frac14: "\u00BC",
frac12: "\u00BD",
frac34: "\u00BE",
iquest: "\u00BF",
Agrave: "\u00C0",
Aacute: "\u00C1",
Acirc: "\u00C2",
Atilde: "\u00C3",
Auml: "\u00C4",
Aring: "\u00C5",
AElig: "\u00C6",
Ccedil: "\u00C7",
Egrave: "\u00C8",
Eacute: "\u00C9",
Ecirc: "\u00CA",
Euml: "\u00CB",
Igrave: "\u00CC",
Iacute: "\u00CD",
Icirc: "\u00CE",
Iuml: "\u00CF",
ETH: "\u00D0",
Ntilde: "\u00D1",
Ograve: "\u00D2",
Oacute: "\u00D3",
Ocirc: "\u00D4",
Otilde: "\u00D5",
Ouml: "\u00D6",
times: "\u00D7",
Oslash: "\u00D8",
Ugrave: "\u00D9",
Uacute: "\u00DA",
Ucirc: "\u00DB",
Uuml: "\u00DC",
Yacute: "\u00DD",
THORN: "\u00DE",
szlig: "\u00DF",
agrave: "\u00E0",
aacute: "\u00E1",
acirc: "\u00E2",
atilde: "\u00E3",
auml: "\u00E4",
aring: "\u00E5",
aelig: "\u00E6",
ccedil: "\u00E7",
egrave: "\u00E8",
eacute: "\u00E9",
ecirc: "\u00EA",
euml: "\u00EB",
igrave: "\u00EC",
iacute: "\u00ED",
icirc: "\u00EE",
iuml: "\u00EF",
eth: "\u00F0",
ntilde: "\u00F1",
ograve: "\u00F2",
oacute: "\u00F3",
ocirc: "\u00F4",
otilde: "\u00F5",
ouml: "\u00F6",
divide: "\u00F7",
oslash: "\u00F8",
ugrave: "\u00F9",
uacute: "\u00FA",
ucirc: "\u00FB",
uuml: "\u00FC",
yacute: "\u00FD",
thorn: "\u00FE",
yuml: "\u00FF",
OElig: "\u0152",
oelig: "\u0153",
Scaron: "\u0160",
scaron: "\u0161",
Yuml: "\u0178",
fnof: "\u0192",
circ: "\u02C6",
tilde: "\u02DC",
Alpha: "\u0391",
Beta: "\u0392",
Gamma: "\u0393",
Delta: "\u0394",
Epsilon: "\u0395",
Zeta: "\u0396",
Eta: "\u0397",
Theta: "\u0398",
Iota: "\u0399",
Kappa: "\u039A",
Lambda: "\u039B",
Mu: "\u039C",
Nu: "\u039D",
Xi: "\u039E",
Omicron: "\u039F",
Pi: "\u03A0",
Rho: "\u03A1",
Sigma: "\u03A3",
Tau: "\u03A4",
Upsilon: "\u03A5",
Phi: "\u03A6",
Chi: "\u03A7",
Psi: "\u03A8",
Omega: "\u03A9",
alpha: "\u03B1",
beta: "\u03B2",
gamma: "\u03B3",
delta: "\u03B4",
epsilon: "\u03B5",
zeta: "\u03B6",
eta: "\u03B7",
theta: "\u03B8",
iota: "\u03B9",
kappa: "\u03BA",
lambda: "\u03BB",
mu: "\u03BC",
nu: "\u03BD",
xi: "\u03BE",
omicron: "\u03BF",
pi: "\u03C0",
rho: "\u03C1",
sigmaf: "\u03C2",
sigma: "\u03C3",
tau: "\u03C4",
upsilon: "\u03C5",
phi: "\u03C6",
chi: "\u03C7",
psi: "\u03C8",
omega: "\u03C9",
thetasym: "\u03D1",
upsih: "\u03D2",
piv: "\u03D6",
ensp: "\u2002",
emsp: "\u2003",
thinsp: "\u2009",
zwnj: "\u200C",
zwj: "\u200D",
lrm: "\u200E",
rlm: "\u200F",
ndash: "\u2013",
mdash: "\u2014",
lsquo: "\u2018",
rsquo: "\u2019",
sbquo: "\u201A",
ldquo: "\u201C",
rdquo: "\u201D",
bdquo: "\u201E",
dagger: "\u2020",
Dagger: "\u2021",
bull: "\u2022",
hellip: "\u2026",
permil: "\u2030",
prime: "\u2032",
Prime: "\u2033",
lsaquo: "\u2039",
rsaquo: "\u203A",
oline: "\u203E",
frasl: "\u2044",
euro: "\u20AC",
image: "\u2111",
weierp: "\u2118",
real: "\u211C",
trade: "\u2122",
alefsym: "\u2135",
larr: "\u2190",
uarr: "\u2191",
rarr: "\u2192",
darr: "\u2193",
harr: "\u2194",
crarr: "\u21B5",
lArr: "\u21D0",
uArr: "\u21D1",
rArr: "\u21D2",
dArr: "\u21D3",
hArr: "\u21D4",
forall: "\u2200",
part: "\u2202",
exist: "\u2203",
empty: "\u2205",
nabla: "\u2207",
isin: "\u2208",
notin: "\u2209",
ni: "\u220B",
prod: "\u220F",
sum: "\u2211",
minus: "\u2212",
lowast: "\u2217",
radic: "\u221A",
prop: "\u221D",
infin: "\u221E",
ang: "\u2220",
and: "\u2227",
or: "\u2228",
cap: "\u2229",
cup: "\u222A",
int: "\u222B",
there4: "\u2234",
sim: "\u223C",
cong: "\u2245",
asymp: "\u2248",
ne: "\u2260",
equiv: "\u2261",
le: "\u2264",
ge: "\u2265",
sub: "\u2282",
sup: "\u2283",
nsub: "\u2284",
sube: "\u2286",
supe: "\u2287",
oplus: "\u2295",
otimes: "\u2297",
perp: "\u22A5",
sdot: "\u22C5",
lceil: "\u2308",
rceil: "\u2309",
lfloor: "\u230A",
rfloor: "\u230B",
lang: "\u2329",
rang: "\u232A",
loz: "\u25CA",
spades: "\u2660",
clubs: "\u2663",
hearts: "\u2665",
diams: "\u2666"
};
const HEX_NUMBER = /^[\da-fA-F]+$/;
const DECIMAL_NUMBER = /^\d+$/;
types$1.j_oTag = new TokContext("<tag", false);
types$1.j_cTag = new TokContext("</tag", false);
types$1.j_expr = new TokContext("<tag>...</tag>", true, true);
types.jsxName = new TokenType("jsxName");
types.jsxText = new TokenType("jsxText", {
beforeExpr: true
});
types.jsxTagStart = new TokenType("jsxTagStart", {
startsExpr: true
});
types.jsxTagEnd = new TokenType("jsxTagEnd");
types.jsxTagStart.updateContext = function () {
this.state.context.push(types$1.j_expr);
this.state.context.push(types$1.j_oTag);
this.state.exprAllowed = false;
};
types.jsxTagEnd.updateContext = function (prevType) {
const out = this.state.context.pop();
if (out === types$1.j_oTag && prevType === types.slash || out === types$1.j_cTag) {
this.state.context.pop();
this.state.exprAllowed = this.curContext() === types$1.j_expr;
} else {
this.state.exprAllowed = true;
}
};
function isFragment(object) {
return object ? object.type === "JSXOpeningFragment" || object.type === "JSXClosingFragment" : false;
}
function getQualifiedJSXName(object) {
if (object.type === "JSXIdentifier") {
return object.name;
}
if (object.type === "JSXNamespacedName") {
return object.namespace.name + ":" + object.name.name;
}
if (object.type === "JSXMemberExpression") {
return getQualifiedJSXName(object.object) + "." + getQualifiedJSXName(object.property);
}
throw new Error("Node had unexpected type: " + object.type);
}
var jsx = (superClass => class extends superClass {
jsxReadToken() {
let out = "";
let chunkStart = this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
this.raise(this.state.start, "Unterminated JSX contents");
}
const ch = this.input.charCodeAt(this.state.pos);
switch (ch) {
case 60:
case 123:
if (this.state.pos === this.state.start) {
if (ch === 60 && this.state.exprAllowed) {
++this.state.pos;
return this.finishToken(types.jsxTagStart);
}
return super.getTokenFromCode(ch);
}
out += this.input.slice(chunkStart, this.state.pos);
return this.finishToken(types.jsxText, out);
case 38:
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadEntity();
chunkStart = this.state.pos;
break;
default:
if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadNewLine(true);
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
}
}
jsxReadNewLine(normalizeCRLF) {
const ch = this.input.charCodeAt(this.state.pos);
let out;
++this.state.pos;
if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
out = normalizeCRLF ? "\n" : "\r\n";
} else {
out = String.fromCharCode(ch);
}
++this.state.curLine;
this.state.lineStart = this.state.pos;
return out;
}
jsxReadString(quote) {
let out = "";
let chunkStart = ++this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
this.raise(this.state.start, "Unterminated string constant");
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === quote) break;
if (ch === 38) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadEntity();
chunkStart = this.state.pos;
} else if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadNewLine(false);
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
out += this.input.slice(chunkStart, this.state.pos++);
return this.finishToken(types.string, out);
}
jsxReadEntity() {
let str = "";
let count = 0;
let entity;
let ch = this.input[this.state.pos];
const startPos = ++this.state.pos;
while (this.state.pos < this.length && count++ < 10) {
ch = this.input[this.state.pos++];
if (ch === ";") {
if (str[0] === "#") {
if (str[1] === "x") {
str = str.substr(2);
if (HEX_NUMBER.test(str)) {
entity = String.fromCodePoint(parseInt(str, 16));
}
} else {
str = str.substr(1);
if (DECIMAL_NUMBER.test(str)) {
entity = String.fromCodePoint(parseInt(str, 10));
}
}
} else {
entity = entities[str];
}
break;
}
str += ch;
}
if (!entity) {
this.state.pos = startPos;
return "&";
}
return entity;
}
jsxReadWord() {
let ch;
const start = this.state.pos;
do {
ch = this.input.charCodeAt(++this.state.pos);
} while (isIdentifierChar(ch) || ch === 45);
return this.finishToken(types.jsxName, this.input.slice(start, this.state.pos));
}
jsxParseIdentifier() {
const node = this.startNode();
if (this.match(types.jsxName)) {
node.name = this.state.value;
} else if (this.state.type.keyword) {
node.name = this.state.type.keyword;
} else {
this.unexpected();
}
this.next();
return this.finishNode(node, "JSXIdentifier");
}
jsxParseNamespacedName() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const name = this.jsxParseIdentifier();
if (!this.eat(types.colon)) return name;
const node = this.startNodeAt(startPos, startLoc);
node.namespace = name;
node.name = this.jsxParseIdentifier();
return this.finishNode(node, "JSXNamespacedName");
}
jsxParseElementName() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let node = this.jsxParseNamespacedName();
while (this.eat(types.dot)) {
const newNode = this.startNodeAt(startPos, startLoc);
newNode.object = node;
newNode.property = this.jsxParseIdentifier();
node = this.finishNode(newNode, "JSXMemberExpression");
}
return node;
}
jsxParseAttributeValue() {
let node;
switch (this.state.type) {
case types.braceL:
node = this.startNode();
this.next();
node = this.jsxParseExpressionContainer(node);
if (node.expression.type === "JSXEmptyExpression") {
throw this.raise(node.start, "JSX attributes must only be assigned a non-empty expression");
} else {
return node;
}
case types.jsxTagStart:
case types.string:
return this.parseExprAtom();
default:
throw this.raise(this.state.start, "JSX value should be either an expression or a quoted JSX text");
}
}
jsxParseEmptyExpression() {
const node = this.startNodeAt(this.state.lastTokEnd, this.state.lastTokEndLoc);
return this.finishNodeAt(node, "JSXEmptyExpression", this.state.start, this.state.startLoc);
}
jsxParseSpreadChild(node) {
this.next();
node.expression = this.parseExpression();
this.expect(types.braceR);
return this.finishNode(node, "JSXSpreadChild");
}
jsxParseExpressionContainer(node) {
if (this.match(types.braceR)) {
node.expression = this.jsxParseEmptyExpression();
} else {
node.expression = this.parseExpression();
}
this.expect(types.braceR);
return this.finishNode(node, "JSXExpressionContainer");
}
jsxParseAttribute() {
const node = this.startNode();
if (this.eat(types.braceL)) {
this.expect(types.ellipsis);
node.argument = this.parseMaybeAssign();
this.expect(types.braceR);
return this.finishNode(node, "JSXSpreadAttribute");
}
node.name = this.jsxParseNamespacedName();
node.value = this.eat(types.eq) ? this.jsxParseAttributeValue() : null;
return this.finishNode(node, "JSXAttribute");
}
jsxParseOpeningElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
if (this.match(types.jsxTagEnd)) {
this.expect(types.jsxTagEnd);
return this.finishNode(node, "JSXOpeningFragment");
}
node.name = this.jsxParseElementName();
return this.jsxParseOpeningElementAfterName(node);
}
jsxParseOpeningElementAfterName(node) {
const attributes = [];
while (!this.match(types.slash) && !this.match(types.jsxTagEnd)) {
attributes.push(this.jsxParseAttribute());
}
node.attributes = attributes;
node.selfClosing = this.eat(types.slash);
this.expect(types.jsxTagEnd);
return this.finishNode(node, "JSXOpeningElement");
}
jsxParseClosingElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
if (this.match(types.jsxTagEnd)) {
this.expect(types.jsxTagEnd);
return this.finishNode(node, "JSXClosingFragment");
}
node.name = this.jsxParseElementName();
this.expect(types.jsxTagEnd);
return this.finishNode(node, "JSXClosingElement");
}
jsxParseElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
const children = [];
const openingElement = this.jsxParseOpeningElementAt(startPos, startLoc);
let closingElement = null;
if (!openingElement.selfClosing) {
contents: for (;;) {
switch (this.state.type) {
case types.jsxTagStart:
startPos = this.state.start;
startLoc = this.state.startLoc;
this.next();
if (this.eat(types.slash)) {
closingElement = this.jsxParseClosingElementAt(startPos, startLoc);
break contents;
}
children.push(this.jsxParseElementAt(startPos, startLoc));
break;
case types.jsxText:
children.push(this.parseExprAtom());
break;
case types.braceL:
{
const node = this.startNode();
this.next();
if (this.match(types.ellipsis)) {
children.push(this.jsxParseSpreadChild(node));
} else {
children.push(this.jsxParseExpressionContainer(node));
}
break;
}
default:
throw this.unexpected();
}
}
if (isFragment(openingElement) && !isFragment(closingElement)) {
this.raise(closingElement.start, "Expected corresponding JSX closing tag for <>");
} else if (!isFragment(openingElement) && isFragment(closingElement)) {
this.raise(closingElement.start, "Expected corresponding JSX closing tag for <" + getQualifiedJSXName(openingElement.name) + ">");
} else if (!isFragment(openingElement) && !isFragment(closingElement)) {
if (getQualifiedJSXName(closingElement.name) !== getQualifiedJSXName(openingElement.name)) {
this.raise(closingElement.start, "Expected corresponding JSX closing tag for <" + getQualifiedJSXName(openingElement.name) + ">");
}
}
}
if (isFragment(openingElement)) {
node.openingFragment = openingElement;
node.closingFragment = closingElement;
} else {
node.openingElement = openingElement;
node.closingElement = closingElement;
}
node.children = children;
if (this.match(types.relational) && this.state.value === "<") {
this.raise(this.state.start, "Adjacent JSX elements must be wrapped in an enclosing tag. " + "Did you want a JSX fragment <>...</>?");
}
return isFragment(openingElement) ? this.finishNode(node, "JSXFragment") : this.finishNode(node, "JSXElement");
}
jsxParseElement() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
this.next();
return this.jsxParseElementAt(startPos, startLoc);
}
parseExprAtom(refShortHandDefaultPos) {
if (this.match(types.jsxText)) {
return this.parseLiteral(this.state.value, "JSXText");
} else if (this.match(types.jsxTagStart)) {
return this.jsxParseElement();
} else if (this.isRelational("<") && this.input.charCodeAt(this.state.pos) !== 33) {
this.finishToken(types.jsxTagStart);
return this.jsxParseElement();
} else {
return super.parseExprAtom(refShortHandDefaultPos);
}
}
getTokenFromCode(code) {
if (this.state.inPropertyName) return super.getTokenFromCode(code);
const context = this.curContext();
if (context === types$1.j_expr) {
return this.jsxReadToken();
}
if (context === types$1.j_oTag || context === types$1.j_cTag) {
if (isIdentifierStart(code)) {
return this.jsxReadWord();
}
if (code === 62) {
++this.state.pos;
return this.finishToken(types.jsxTagEnd);
}
if ((code === 34 || code === 39) && context === types$1.j_oTag) {
return this.jsxReadString(code);
}
}
if (code === 60 && this.state.exprAllowed && this.input.charCodeAt(this.state.pos + 1) !== 33) {
++this.state.pos;
return this.finishToken(types.jsxTagStart);
}
return super.getTokenFromCode(code);
}
updateContext(prevType) {
if (this.match(types.braceL)) {
const curContext = this.curContext();
if (curContext === types$1.j_oTag) {
this.state.context.push(types$1.braceExpression);
} else if (curContext === types$1.j_expr) {
this.state.context.push(types$1.templateQuasi);
} else {
super.updateContext(prevType);
}
this.state.exprAllowed = true;
} else if (this.match(types.slash) && prevType === types.jsxTagStart) {
this.state.context.length -= 2;
this.state.context.push(types$1.j_cTag);
this.state.exprAllowed = false;
} else {
return super.updateContext(prevType);
}
}
});
class Scope {
constructor(flags) {
this.var = [];
this.lexical = [];
this.functions = [];
this.flags = flags;
}
}
class ScopeHandler {
constructor(raise, inModule) {
this.scopeStack = [];
this.undefinedExports = new Map();
this.raise = raise;
this.inModule = inModule;
}
get inFunction() {
return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0;
}
get inGenerator() {
return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0;
}
get inAsync() {
return (this.currentVarScope().flags & SCOPE_ASYNC) > 0;
}
get allowSuper() {
return (this.currentThisScope().flags & SCOPE_SUPER) > 0;
}
get allowDirectSuper() {
return (this.currentThisScope().flags & SCOPE_DIRECT_SUPER) > 0;
}
get inNonArrowFunction() {
return (this.currentThisScope().flags & SCOPE_FUNCTION) > 0;
}
get treatFunctionsAsVar() {
return this.treatFunctionsAsVarInScope(this.currentScope());
}
createScope(flags) {
return new Scope(flags);
}
enter(flags) {
this.scopeStack.push(this.createScope(flags));
}
exit() {
this.scopeStack.pop();
}
treatFunctionsAsVarInScope(scope) {
return !!(scope.flags & SCOPE_FUNCTION || !this.inModule && scope.flags & SCOPE_PROGRAM);
}
declareName(name, bindingType, pos) {
let scope = this.currentScope();
if (bindingType & BIND_SCOPE_LEXICAL || bindingType & BIND_SCOPE_FUNCTION) {
this.checkRedeclarationInScope(scope, name, bindingType, pos);
if (bindingType & BIND_SCOPE_FUNCTION) {
scope.functions.push(name);
} else {
scope.lexical.push(name);
}
if (bindingType & BIND_SCOPE_LEXICAL) {
this.maybeExportDefined(scope, name);
}
} else if (bindingType & BIND_SCOPE_VAR) {
for (let i = this.scopeStack.length - 1; i >= 0; --i) {
scope = this.scopeStack[i];
this.checkRedeclarationInScope(scope, name, bindingType, pos);
scope.var.push(name);
this.maybeExportDefined(scope, name);
if (scope.flags & SCOPE_VAR) break;
}
}
if (this.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
}
maybeExportDefined(scope, name) {
if (this.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
}
checkRedeclarationInScope(scope, name, bindingType, pos) {
if (this.isRedeclaredInScope(scope, name, bindingType)) {
this.raise(pos, `Identifier '${name}' has already been declared`);
}
}
isRedeclaredInScope(scope, name, bindingType) {
if (!(bindingType & BIND_KIND_VALUE)) return false;
if (bindingType & BIND_SCOPE_LEXICAL) {
return scope.lexical.indexOf(name) > -1 || scope.functions.indexOf(name) > -1 || scope.var.indexOf(name) > -1;
}
if (bindingType & BIND_SCOPE_FUNCTION) {
return scope.lexical.indexOf(name) > -1 || !this.treatFunctionsAsVarInScope(scope) && scope.var.indexOf(name) > -1;
}
return scope.lexical.indexOf(name) > -1 && !(scope.flags & SCOPE_SIMPLE_CATCH && scope.lexical[0] === name) || !this.treatFunctionsAsVarInScope(scope) && scope.functions.indexOf(name) > -1;
}
checkLocalExport(id) {
if (this.scopeStack[0].lexical.indexOf(id.name) === -1 && this.scopeStack[0].var.indexOf(id.name) === -1 && this.scopeStack[0].functions.indexOf(id.name) === -1) {
this.undefinedExports.set(id.name, id.start);
}
}
currentScope() {
return this.scopeStack[this.scopeStack.length - 1];
}
currentVarScope() {
for (let i = this.scopeStack.length - 1;; i--) {
const scope = this.scopeStack[i];
if (scope.flags & SCOPE_VAR) {
return scope;
}
}
}
currentThisScope() {
for (let i = this.scopeStack.length - 1;; i--) {
const scope = this.scopeStack[i];
if ((scope.flags & SCOPE_VAR || scope.flags & SCOPE_CLASS) && !(scope.flags & SCOPE_ARROW)) {
return scope;
}
}
}
}
class TypeScriptScope extends Scope {
constructor(...args) {
super(...args);
this.types = [];
this.enums = [];
this.constEnums = [];
this.classes = [];
this.exportOnlyBindings = [];
}
}
class TypeScriptScopeHandler extends ScopeHandler {
createScope(flags) {
return new TypeScriptScope(flags);
}
declareName(name, bindingType, pos) {
const scope = this.currentScope();
if (bindingType & BIND_FLAGS_TS_EXPORT_ONLY) {
this.maybeExportDefined(scope, name);
scope.exportOnlyBindings.push(name);
return;
}
super.declareName(...arguments);
if (bindingType & BIND_KIND_TYPE) {
if (!(bindingType & BIND_KIND_VALUE)) {
this.checkRedeclarationInScope(scope, name, bindingType, pos);
this.maybeExportDefined(scope, name);
}
scope.types.push(name);
}
if (bindingType & BIND_FLAGS_TS_ENUM) scope.enums.push(name);
if (bindingType & BIND_FLAGS_TS_CONST_ENUM) scope.constEnums.push(name);
if (bindingType & BIND_FLAGS_CLASS) scope.classes.push(name);
}
isRedeclaredInScope(scope, name, bindingType) {
if (scope.enums.indexOf(name) > -1) {
if (bindingType & BIND_FLAGS_TS_ENUM) {
const isConst = !!(bindingType & BIND_FLAGS_TS_CONST_ENUM);
const wasConst = scope.constEnums.indexOf(name) > -1;
return isConst !== wasConst;
}
return true;
}
if (bindingType & BIND_FLAGS_CLASS && scope.classes.indexOf(name) > -1) {
if (scope.lexical.indexOf(name) > -1) {
return !!(bindingType & BIND_KIND_VALUE);
} else {
return false;
}
}
if (bindingType & BIND_KIND_TYPE && scope.types.indexOf(name) > -1) {
return true;
}
return super.isRedeclaredInScope(...arguments);
}
checkLocalExport(id) {
if (this.scopeStack[0].types.indexOf(id.name) === -1 && this.scopeStack[0].exportOnlyBindings.indexOf(id.name) === -1) {
super.checkLocalExport(id);
}
}
}
function nonNull(x) {
if (x == null) {
throw new Error(`Unexpected ${x} value.`);
}
return x;
}
function assert(x) {
if (!x) {
throw new Error("Assert fail");
}
}
function keywordTypeFromName(value) {
switch (value) {
case "any":
return "TSAnyKeyword";
case "boolean":
return "TSBooleanKeyword";
case "bigint":
return "TSBigIntKeyword";
case "never":
return "TSNeverKeyword";
case "number":
return "TSNumberKeyword";
case "object":
return "TSObjectKeyword";
case "string":
return "TSStringKeyword";
case "symbol":
return "TSSymbolKeyword";
case "undefined":
return "TSUndefinedKeyword";
case "unknown":
return "TSUnknownKeyword";
default:
return undefined;
}
}
var typescript = (superClass => class extends superClass {
getScopeHandler() {
return TypeScriptScopeHandler;
}
tsIsIdentifier() {
return this.match(types.name);
}
tsNextTokenCanFollowModifier() {
this.next();
return !this.hasPrecedingLineBreak() && !this.match(types.parenL) && !this.match(types.parenR) && !this.match(types.colon) && !this.match(types.eq) && !this.match(types.question) && !this.match(types.bang);
}
tsParseModifier(allowedModifiers) {
if (!this.match(types.name)) {
return undefined;
}
const modifier = this.state.value;
if (allowedModifiers.indexOf(modifier) !== -1 && this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) {
return modifier;
}
return undefined;
}
tsIsListTerminator(kind) {
switch (kind) {
case "EnumMembers":
case "TypeMembers":
return this.match(types.braceR);
case "HeritageClauseElement":
return this.match(types.braceL);
case "TupleElementTypes":
return this.match(types.bracketR);
case "TypeParametersOrArguments":
return this.isRelational(">");
}
throw new Error("Unreachable");
}
tsParseList(kind, parseElement) {
const result = [];
while (!this.tsIsListTerminator(kind)) {
result.push(parseElement());
}
return result;
}
tsParseDelimitedList(kind, parseElement) {
return nonNull(this.tsParseDelimitedListWorker(kind, parseElement, true));
}
tsTryParseDelimitedList(kind, parseElement) {
return this.tsParseDelimitedListWorker(kind, parseElement, false);
}
tsParseDelimitedListWorker(kind, parseElement, expectSuccess) {
const result = [];
while (true) {
if (this.tsIsListTerminator(kind)) {
break;
}
const element = parseElement();
if (element == null) {
return undefined;
}
result.push(element);
if (this.eat(types.comma)) {
continue;
}
if (this.tsIsListTerminator(kind)) {
break;
}
if (expectSuccess) {
this.expect(types.comma);
}
return undefined;
}
return result;
}
tsParseBracketedList(kind, parseElement, bracket, skipFirstToken) {
if (!skipFirstToken) {
if (bracket) {
this.expect(types.bracketL);
} else {
this.expectRelational("<");
}
}
const result = this.tsParseDelimitedList(kind, parseElement);
if (bracket) {
this.expect(types.bracketR);
} else {
this.expectRelational(">");
}
return result;
}
tsParseImportType() {
const node = this.startNode();
this.expect(types._import);
this.expect(types.parenL);
if (!this.match(types.string)) {
throw this.unexpected(null, "Argument in a type import must be a string literal");
}
node.argument = this.parseExprAtom();
this.expect(types.parenR);
if (this.eat(types.dot)) {
node.qualifier = this.tsParseEntityName(true);
}
if (this.isRelational("<")) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, "TSImportType");
}
tsParseEntityName(allowReservedWords) {
let entity = this.parseIdentifier();
while (this.eat(types.dot)) {
const node = this.startNodeAtNode(entity);
node.left = entity;
node.right = this.parseIdentifier(allowReservedWords);
entity = this.finishNode(node, "TSQualifiedName");
}
return entity;
}
tsParseTypeReference() {
const node = this.startNode();
node.typeName = this.tsParseEntityName(false);
if (!this.hasPrecedingLineBreak() && this.isRelational("<")) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, "TSTypeReference");
}
tsParseThisTypePredicate(lhs) {
this.next();
const node = this.startNodeAtNode(lhs);
node.parameterName = lhs;
node.typeAnnotation = this.tsParseTypeAnnotation(false);
return this.finishNode(node, "TSTypePredicate");
}
tsParseThisTypeNode() {
const node = this.startNode();
this.next();
return this.finishNode(node, "TSThisType");
}
tsParseTypeQuery() {
const node = this.startNode();
this.expect(types._typeof);
if (this.match(types._import)) {
node.exprName = this.tsParseImportType();
} else {
node.exprName = this.tsParseEntityName(true);
}
return this.finishNode(node, "TSTypeQuery");
}
tsParseTypeParameter() {
const node = this.startNode();
node.name = this.parseIdentifierName(node.start);
node.constraint = this.tsEatThenParseType(types._extends);
node.default = this.tsEatThenParseType(types.eq);
return this.finishNode(node, "TSTypeParameter");
}
tsTryParseTypeParameters() {
if (this.isRelational("<")) {
return this.tsParseTypeParameters();
}
}
tsParseTypeParameters() {
const node = this.startNode();
if (this.isRelational("<") || this.match(types.jsxTagStart)) {
this.next();
} else {
this.unexpected();
}
node.params = this.tsParseBracketedList("TypeParametersOrArguments", this.tsParseTypeParameter.bind(this), false, true);
return this.finishNode(node, "TSTypeParameterDeclaration");
}
tsTryNextParseConstantContext() {
if (this.lookahead().type === types._const) {
this.next();
return this.tsParseTypeReference();
}
return null;
}
tsFillSignature(returnToken, signature) {
const returnTokenRequired = returnToken === types.arrow;
signature.typeParameters = this.tsTryParseTypeParameters();
this.expect(types.parenL);
signature.parameters = this.tsParseBindingListForSignature();
if (returnTokenRequired) {
signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
} else if (this.match(returnToken)) {
signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
}
}
tsParseBindingListForSignature() {
return this.parseBindingList(types.parenR).map(pattern => {
if (pattern.type !== "Identifier" && pattern.type !== "RestElement" && pattern.type !== "ObjectPattern" && pattern.type !== "ArrayPattern") {
throw this.unexpected(pattern.start, `Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got ${pattern.type}`);
}
return pattern;
});
}
tsParseTypeMemberSemicolon() {
if (!this.eat(types.comma)) {
this.semicolon();
}
}
tsParseSignatureMember(kind, node) {
this.tsFillSignature(types.colon, node);
this.tsParseTypeMemberSemicolon();
return this.finishNode(node, kind);
}
tsIsUnambiguouslyIndexSignature() {
this.next();
return this.eat(types.name) && this.match(types.colon);
}
tsTryParseIndexSignature(node) {
if (!(this.match(types.bracketL) && this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this)))) {
return undefined;
}
this.expect(types.bracketL);
const id = this.parseIdentifier();
id.typeAnnotation = this.tsParseTypeAnnotation();
this.resetEndLocation(id);
this.expect(types.bracketR);
node.parameters = [id];
const type = this.tsTryParseTypeAnnotation();
if (type) node.typeAnnotation = type;
this.tsParseTypeMemberSemicolon();
return this.finishNode(node, "TSIndexSignature");
}
tsParsePropertyOrMethodSignature(node, readonly) {
if (this.eat(types.question)) node.optional = true;
const nodeAny = node;
if (!readonly && (this.match(types.parenL) || this.isRelational("<"))) {
const method = nodeAny;
this.tsFillSignature(types.colon, method);
this.tsParseTypeMemberSemicolon();
return this.finishNode(method, "TSMethodSignature");
} else {
const property = nodeAny;
if (readonly) property.readonly = true;
const type = this.tsTryParseTypeAnnotation();
if (type) property.typeAnnotation = type;
this.tsParseTypeMemberSemicolon();
return this.finishNode(property, "TSPropertySignature");
}
}
tsParseTypeMember() {
const node = this.startNode();
if (this.match(types.parenL) || this.isRelational("<")) {
return this.tsParseSignatureMember("TSCallSignatureDeclaration", node);
}
if (this.match(types._new)) {
const id = this.startNode();
this.next();
if (this.match(types.parenL) || this.isRelational("<")) {
return this.tsParseSignatureMember("TSConstructSignatureDeclaration", node);
} else {
node.key = this.createIdentifier(id, "new");
return this.tsParsePropertyOrMethodSignature(node, false);
}
}
const readonly = !!this.tsParseModifier(["readonly"]);
const idx = this.tsTryParseIndexSignature(node);
if (idx) {
if (readonly) node.readonly = true;
return idx;
}
this.parsePropertyName(node);
return this.tsParsePropertyOrMethodSignature(node, readonly);
}
tsParseTypeLiteral() {
const node = this.startNode();
node.members = this.tsParseObjectTypeMembers();
return this.finishNode(node, "TSTypeLiteral");
}
tsParseObjectTypeMembers() {
this.expect(types.braceL);
const members = this.tsParseList("TypeMembers", this.tsParseTypeMember.bind(this));
this.expect(types.braceR);
return members;
}
tsIsStartOfMappedType() {
this.next();
if (this.eat(types.plusMin)) {
return this.isContextual("readonly");
}
if (this.isContextual("readonly")) {
this.next();
}
if (!this.match(types.bracketL)) {
return false;
}
this.next();
if (!this.tsIsIdentifier()) {
return false;
}
this.next();
return this.match(types._in);
}
tsParseMappedTypeParameter() {
const node = this.startNode();
node.name = this.parseIdentifierName(node.start);
node.constraint = this.tsExpectThenParseType(types._in);
return this.finishNode(node, "TSTypeParameter");
}
tsParseMappedType() {
const node = this.startNode();
this.expect(types.braceL);
if (this.match(types.plusMin)) {
node.readonly = this.state.value;
this.next();
this.expectContextual("readonly");
} else if (this.eatContextual("readonly")) {
node.readonly = true;
}
this.expect(types.bracketL);
node.typeParameter = this.tsParseMappedTypeParameter();
this.expect(types.bracketR);
if (this.match(types.plusMin)) {
node.optional = this.state.value;
this.next();
this.expect(types.question);
} else if (this.eat(types.question)) {
node.optional = true;
}
node.typeAnnotation = this.tsTryParseType();
this.semicolon();
this.expect(types.braceR);
return this.finishNode(node, "TSMappedType");
}
tsParseTupleType() {
const node = this.startNode();
node.elementTypes = this.tsParseBracketedList("TupleElementTypes", this.tsParseTupleElementType.bind(this), true, false);
let seenOptionalElement = false;
node.elementTypes.forEach(elementNode => {
if (elementNode.type === "TSOptionalType") {
seenOptionalElement = true;
} else if (seenOptionalElement && elementNode.type !== "TSRestType") {
this.raise(elementNode.start, "A required element cannot follow an optional element.");
}
});
return this.finishNode(node, "TSTupleType");
}
tsParseTupleElementType() {
if (this.match(types.ellipsis)) {
const restNode = this.startNode();
this.next();
restNode.typeAnnotation = this.tsParseType();
this.checkCommaAfterRest();
return this.finishNode(restNode, "TSRestType");
}
const type = this.tsParseType();
if (this.eat(types.question)) {
const optionalTypeNode = this.startNodeAtNode(type);
optionalTypeNode.typeAnnotation = type;
return this.finishNode(optionalTypeNode, "TSOptionalType");
}
return type;
}
tsParseParenthesizedType() {
const node = this.startNode();
this.expect(types.parenL);
node.typeAnnotation = this.tsParseType();
this.expect(types.parenR);
return this.finishNode(node, "TSParenthesizedType");
}
tsParseFunctionOrConstructorType(type) {
const node = this.startNode();
if (type === "TSConstructorType") {
this.expect(types._new);
}
this.tsFillSignature(types.arrow, node);
return this.finishNode(node, type);
}
tsParseLiteralTypeNode() {
const node = this.startNode();
node.literal = (() => {
switch (this.state.type) {
case types.num:
case types.string:
case types._true:
case types._false:
return this.parseExprAtom();
default:
throw this.unexpected();
}
})();
return this.finishNode(node, "TSLiteralType");
}
tsParseTemplateLiteralType() {
const node = this.startNode();
const templateNode = this.parseTemplate(false);
if (templateNode.expressions.length > 0) {
throw this.raise(templateNode.expressions[0].start, "Template literal types cannot have any substitution");
}
node.literal = templateNode;
return this.finishNode(node, "TSLiteralType");
}
tsParseNonArrayType() {
switch (this.state.type) {
case types.name:
case types._void:
case types._null:
{
const type = this.match(types._void) ? "TSVoidKeyword" : this.match(types._null) ? "TSNullKeyword" : keywordTypeFromName(this.state.value);
if (type !== undefined && this.lookahead().type !== types.dot) {
const node = this.startNode();
this.next();
return this.finishNode(node, type);
}
return this.tsParseTypeReference();
}
case types.string:
case types.num:
case types._true:
case types._false:
return this.tsParseLiteralTypeNode();
case types.plusMin:
if (this.state.value === "-") {
const node = this.startNode();
if (this.lookahead().type !== types.num) {
throw this.unexpected();
}
node.literal = this.parseMaybeUnary();
return this.finishNode(node, "TSLiteralType");
}
break;
case types._this:
{
const thisKeyword = this.tsParseThisTypeNode();
if (this.isContextual("is") && !this.hasPrecedingLineBreak()) {
return this.tsParseThisTypePredicate(thisKeyword);
} else {
return thisKeyword;
}
}
case types._typeof:
return this.tsParseTypeQuery();
case types._import:
return this.tsParseImportType();
case types.braceL:
return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ? this.tsParseMappedType() : this.tsParseTypeLiteral();
case types.bracketL:
return this.tsParseTupleType();
case types.parenL:
return this.tsParseParenthesizedType();
case types.backQuote:
return this.tsParseTemplateLiteralType();
}
throw this.unexpected();
}
tsParseArrayTypeOrHigher() {
let type = this.tsParseNonArrayType();
while (!this.hasPrecedingLineBreak() && this.eat(types.bracketL)) {
if (this.match(types.bracketR)) {
const node = this.startNodeAtNode(type);
node.elementType = type;
this.expect(types.bracketR);
type = this.finishNode(node, "TSArrayType");
} else {
const node = this.startNodeAtNode(type);
node.objectType = type;
node.indexType = this.tsParseType();
this.expect(types.bracketR);
type = this.finishNode(node, "TSIndexedAccessType");
}
}
return type;
}
tsParseTypeOperator(operator) {
const node = this.startNode();
this.expectContextual(operator);
node.operator = operator;
node.typeAnnotation = this.tsParseTypeOperatorOrHigher();
if (operator === "readonly") {
this.tsCheckTypeAnnotationForReadOnly(node);
}
return this.finishNode(node, "TSTypeOperator");
}
tsCheckTypeAnnotationForReadOnly(node) {
switch (node.typeAnnotation.type) {
case "TSTupleType":
case "TSArrayType":
return;
default:
this.raise(node.start, "'readonly' type modifier is only permitted on array and tuple literal types.");
}
}
tsParseInferType() {
const node = this.startNode();
this.expectContextual("infer");
const typeParameter = this.startNode();
typeParameter.name = this.parseIdentifierName(typeParameter.start);
node.typeParameter = this.finishNode(typeParameter, "TSTypeParameter");
return this.finishNode(node, "TSInferType");
}
tsParseTypeOperatorOrHigher() {
const operator = ["keyof", "unique", "readonly"].find(kw => this.isContextual(kw));
return operator ? this.tsParseTypeOperator(operator) : this.isContextual("infer") ? this.tsParseInferType() : this.tsParseArrayTypeOrHigher();
}
tsParseUnionOrIntersectionType(kind, parseConstituentType, operator) {
this.eat(operator);
let type = parseConstituentType();
if (this.match(operator)) {
const types = [type];
while (this.eat(operator)) {
types.push(parseConstituentType());
}
const node = this.startNodeAtNode(type);
node.types = types;
type = this.finishNode(node, kind);
}
return type;
}
tsParseIntersectionTypeOrHigher() {
return this.tsParseUnionOrIntersectionType("TSIntersectionType", this.tsParseTypeOperatorOrHigher.bind(this), types.bitwiseAND);
}
tsParseUnionTypeOrHigher() {
return this.tsParseUnionOrIntersectionType("TSUnionType", this.tsParseIntersectionTypeOrHigher.bind(this), types.bitwiseOR);
}
tsIsStartOfFunctionType() {
if (this.isRelational("<")) {
return true;
}
return this.match(types.parenL) && this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this));
}
tsSkipParameterStart() {
if (this.match(types.name) || this.match(types._this)) {
this.next();
return true;
}
if (this.match(types.braceL)) {
let braceStackCounter = 1;
this.next();
while (braceStackCounter > 0) {
if (this.match(types.braceL)) {
++braceStackCounter;
} else if (this.match(types.braceR)) {
--braceStackCounter;
}
this.next();
}
return true;
}
if (this.match(types.bracketL)) {
let braceStackCounter = 1;
this.next();
while (braceStackCounter > 0) {
if (this.match(types.bracketL)) {
++braceStackCounter;
} else if (this.match(types.bracketR)) {
--braceStackCounter;
}
this.next();
}
return true;
}
return false;
}
tsIsUnambiguouslyStartOfFunctionType() {
this.next();
if (this.match(types.parenR) || this.match(types.ellipsis)) {
return true;
}
if (this.tsSkipParameterStart()) {
if (this.match(types.colon) || this.match(types.comma) || this.match(types.question) || this.match(types.eq)) {
return true;
}
if (this.match(types.parenR)) {
this.next();
if (this.match(types.arrow)) {
return true;
}
}
}
return false;
}
tsParseTypeOrTypePredicateAnnotation(returnToken) {
return this.tsInType(() => {
const t = this.startNode();
this.expect(returnToken);
const typePredicateVariable = this.tsIsIdentifier() && this.tsTryParse(this.tsParseTypePredicatePrefix.bind(this));
if (!typePredicateVariable) {
return this.tsParseTypeAnnotation(false, t);
}
const type = this.tsParseTypeAnnotation(false);
const node = this.startNodeAtNode(typePredicateVariable);
node.parameterName = typePredicateVariable;
node.typeAnnotation = type;
t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
return this.finishNode(t, "TSTypeAnnotation");
});
}
tsTryParseTypeOrTypePredicateAnnotation() {
return this.match(types.colon) ? this.tsParseTypeOrTypePredicateAnnotation(types.colon) : undefined;
}
tsTryParseTypeAnnotation() {
return this.match(types.colon) ? this.tsParseTypeAnnotation() : undefined;
}
tsTryParseType() {
return this.tsEatThenParseType(types.colon);
}
tsParseTypePredicatePrefix() {
const id = this.parseIdentifier();
if (this.isContextual("is") && !this.hasPrecedingLineBreak()) {
this.next();
return id;
}
}
tsParseTypeAnnotation(eatColon = true, t = this.startNode()) {
this.tsInType(() => {
if (eatColon) this.expect(types.colon);
t.typeAnnotation = this.tsParseType();
});
return this.finishNode(t, "TSTypeAnnotation");
}
tsParseType() {
assert(this.state.inType);
const type = this.tsParseNonConditionalType();
if (this.hasPrecedingLineBreak() || !this.eat(types._extends)) {
return type;
}
const node = this.startNodeAtNode(type);
node.checkType = type;
node.extendsType = this.tsParseNonConditionalType();
this.expect(types.question);
node.trueType = this.tsParseType();
this.expect(types.colon);
node.falseType = this.tsParseType();
return this.finishNode(node, "TSConditionalType");
}
tsParseNonConditionalType() {
if (this.tsIsStartOfFunctionType()) {
return this.tsParseFunctionOrConstructorType("TSFunctionType");
}
if (this.match(types._new)) {
return this.tsParseFunctionOrConstructorType("TSConstructorType");
}
return this.tsParseUnionTypeOrHigher();
}
tsParseTypeAssertion() {
const node = this.startNode();
const _const = this.tsTryNextParseConstantContext();
node.typeAnnotation = _const || this.tsNextThenParseType();
this.expectRelational(">");
node.expression = this.parseMaybeUnary();
return this.finishNode(node, "TSTypeAssertion");
}
tsParseHeritageClause(descriptor) {
const originalStart = this.state.start;
const delimitedList = this.tsParseDelimitedList("HeritageClauseElement", this.tsParseExpressionWithTypeArguments.bind(this));
if (!delimitedList.length) {
this.raise(originalStart, `'${descriptor}' list cannot be empty.`);
}
return delimitedList;
}
tsParseExpressionWithTypeArguments() {
const node = this.startNode();
node.expression = this.tsParseEntityName(false);
if (this.isRelational("<")) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, "TSExpressionWithTypeArguments");
}
tsParseInterfaceDeclaration(node) {
node.id = this.parseIdentifier();
this.checkLVal(node.id, BIND_TS_INTERFACE, undefined, "typescript interface declaration");
node.typeParameters = this.tsTryParseTypeParameters();
if (this.eat(types._extends)) {
node.extends = this.tsParseHeritageClause("extends");
}
const body = this.startNode();
body.body = this.tsInType(this.tsParseObjectTypeMembers.bind(this));
node.body = this.finishNode(body, "TSInterfaceBody");
return this.finishNode(node, "TSInterfaceDeclaration");
}
tsParseTypeAliasDeclaration(node) {
node.id = this.parseIdentifier();
this.checkLVal(node.id, BIND_TS_TYPE, undefined, "typescript type alias");
node.typeParameters = this.tsTryParseTypeParameters();
node.typeAnnotation = this.tsExpectThenParseType(types.eq);
this.semicolon();
return this.finishNode(node, "TSTypeAliasDeclaration");
}
tsInNoContext(cb) {
const oldContext = this.state.context;
this.state.context = [oldContext[0]];
try {
return cb();
} finally {
this.state.context = oldContext;
}
}
tsInType(cb) {
const oldInType = this.state.inType;
this.state.inType = true;
try {
return cb();
} finally {
this.state.inType = oldInType;
}
}
tsEatThenParseType(token) {
return !this.match(token) ? undefined : this.tsNextThenParseType();
}
tsExpectThenParseType(token) {
return this.tsDoThenParseType(() => this.expect(token));
}
tsNextThenParseType() {
return this.tsDoThenParseType(() => this.next());
}
tsDoThenParseType(cb) {
return this.tsInType(() => {
cb();
return this.tsParseType();
});
}
tsParseEnumMember() {
const node = this.startNode();
node.id = this.match(types.string) ? this.parseExprAtom() : this.parseIdentifier(true);
if (this.eat(types.eq)) {
node.initializer = this.parseMaybeAssign();
}
return this.finishNode(node, "TSEnumMember");
}
tsParseEnumDeclaration(node, isConst) {
if (isConst) node.const = true;
node.id = this.parseIdentifier();
this.checkLVal(node.id, isConst ? BIND_TS_CONST_ENUM : BIND_TS_ENUM, undefined, "typescript enum declaration");
this.expect(types.braceL);
node.members = this.tsParseDelimitedList("EnumMembers", this.tsParseEnumMember.bind(this));
this.expect(types.braceR);
return this.finishNode(node, "TSEnumDeclaration");
}
tsParseModuleBlock() {
const node = this.startNode();
this.scope.enter(SCOPE_OTHER);
this.expect(types.braceL);
this.parseBlockOrModuleBlockBody(node.body = [], undefined, true, types.braceR);
this.scope.exit();
return this.finishNode(node, "TSModuleBlock");
}
tsParseModuleOrNamespaceDeclaration(node, nested = false) {
node.id = this.parseIdentifier();
if (!nested) {
this.checkLVal(node.id, BIND_TS_NAMESPACE, null, "module or namespace declaration");
}
if (this.eat(types.dot)) {
const inner = this.startNode();
this.tsParseModuleOrNamespaceDeclaration(inner, true);
node.body = inner;
} else {
node.body = this.tsParseModuleBlock();
}
return this.finishNode(node, "TSModuleDeclaration");
}
tsParseAmbientExternalModuleDeclaration(node) {
if (this.isContextual("global")) {
node.global = true;
node.id = this.parseIdentifier();
} else if (this.match(types.string)) {
node.id = this.parseExprAtom();
} else {
this.unexpected();
}
if (this.match(types.braceL)) {
node.body = this.tsParseModuleBlock();
} else {
this.semicolon();
}
return this.finishNode(node, "TSModuleDeclaration");
}
tsParseImportEqualsDeclaration(node, isExport) {
node.isExport = isExport || false;
node.id = this.parseIdentifier();
this.expect(types.eq);
node.moduleReference = this.tsParseModuleReference();
this.semicolon();
return this.finishNode(node, "TSImportEqualsDeclaration");
}
tsIsExternalModuleReference() {
return this.isContextual("require") && this.lookahead().type === types.parenL;
}
tsParseModuleReference() {
return this.tsIsExternalModuleReference() ? this.tsParseExternalModuleReference() : this.tsParseEntityName(false);
}
tsParseExternalModuleReference() {
const node = this.startNode();
this.expectContextual("require");
this.expect(types.parenL);
if (!this.match(types.string)) {
throw this.unexpected();
}
node.expression = this.parseExprAtom();
this.expect(types.parenR);
return this.finishNode(node, "TSExternalModuleReference");
}
tsLookAhead(f) {
const state = this.state.clone();
const res = f();
this.state = state;
return res;
}
tsTryParseAndCatch(f) {
const state = this.state.clone();
try {
return f();
} catch (e) {
if (e instanceof SyntaxError) {
this.state = state;
return undefined;
}
throw e;
}
}
tsTryParse(f) {
const state = this.state.clone();
const result = f();
if (result !== undefined && result !== false) {
return result;
} else {
this.state = state;
return undefined;
}
}
nodeWithSamePosition(original, type) {
const node = this.startNodeAtNode(original);
node.type = type;
node.end = original.end;
node.loc.end = original.loc.end;
if (original.leadingComments) {
node.leadingComments = original.leadingComments;
}
if (original.trailingComments) {
node.trailingComments = original.trailingComments;
}
if (original.innerComments) node.innerComments = original.innerComments;
return node;
}
tsTryParseDeclare(nany) {
if (this.isLineTerminator()) {
return;
}
let starttype = this.state.type;
let kind;
if (this.isContextual("let")) {
starttype = types._var;
kind = "let";
}
switch (starttype) {
case types._function:
return this.parseFunctionStatement(nany, false, true);
case types._class:
return this.parseClass(nany, true, false);
case types._const:
if (this.match(types._const) && this.isLookaheadContextual("enum")) {
this.expect(types._const);
this.expectContextual("enum");
return this.tsParseEnumDeclaration(nany, true);
}
case types._var:
kind = kind || this.state.value;
return this.parseVarStatement(nany, kind);
case types.name:
{
const value = this.state.value;
if (value === "global") {
return this.tsParseAmbientExternalModuleDeclaration(nany);
} else {
return this.tsParseDeclaration(nany, value, true);
}
}
}
}
tsTryParseExportDeclaration() {
return this.tsParseDeclaration(this.startNode(), this.state.value, true);
}
tsParseExpressionStatement(node, expr) {
switch (expr.name) {
case "declare":
{
const declaration = this.tsTryParseDeclare(node);
if (declaration) {
declaration.declare = true;
return declaration;
}
break;
}
case "global":
if (this.match(types.braceL)) {
const mod = node;
mod.global = true;
mod.id = expr;
mod.body = this.tsParseModuleBlock();
return this.finishNode(mod, "TSModuleDeclaration");
}
break;
default:
return this.tsParseDeclaration(node, expr.name, false);
}
}
tsParseDeclaration(node, value, next) {
switch (value) {
case "abstract":
if (this.tsCheckLineTerminatorAndMatch(types._class, next)) {
const cls = node;
cls.abstract = true;
if (next) {
this.next();
if (!this.match(types._class)) {
this.unexpected(null, types._class);
}
}
return this.parseClass(cls, true, false);
}
break;
case "enum":
if (next || this.match(types.name)) {
if (next) this.next();
return this.tsParseEnumDeclaration(node, false);
}
break;
case "interface":
if (this.tsCheckLineTerminatorAndMatch(types.name, next)) {
if (next) this.next();
return this.tsParseInterfaceDeclaration(node);
}
break;
case "module":
if (next) this.next();
if (this.match(types.string)) {
return this.tsParseAmbientExternalModuleDeclaration(node);
} else if (this.tsCheckLineTerminatorAndMatch(types.name, next)) {
return this.tsParseModuleOrNamespaceDeclaration(node);
}
break;
case "namespace":
if (this.tsCheckLineTerminatorAndMatch(types.name, next)) {
if (next) this.next();
return this.tsParseModuleOrNamespaceDeclaration(node);
}
break;
case "type":
if (this.tsCheckLineTerminatorAndMatch(types.name, next)) {
if (next) this.next();
return this.tsParseTypeAliasDeclaration(node);
}
break;
}
}
tsCheckLineTerminatorAndMatch(tokenType, next) {
return (next || this.match(tokenType)) && !this.isLineTerminator();
}
tsTryParseGenericAsyncArrowFunction(startPos, startLoc) {
if (!this.isRelational("<")) {
return undefined;
}
const res = this.tsTryParseAndCatch(() => {
const node = this.startNodeAt(startPos, startLoc);
node.typeParameters = this.tsParseTypeParameters();
super.parseFunctionParams(node);
node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation();
this.expect(types.arrow);
return node;
});
if (!res) {
return undefined;
}
return this.parseArrowExpression(res, null, true);
}
tsParseTypeArguments() {
const node = this.startNode();
node.params = this.tsInType(() => this.tsInNoContext(() => {
this.expectRelational("<");
return this.tsParseDelimitedList("TypeParametersOrArguments", this.tsParseType.bind(this));
}));
this.state.exprAllowed = false;
this.expectRelational(">");
return this.finishNode(node, "TSTypeParameterInstantiation");
}
tsIsDeclarationStart() {
if (this.match(types.name)) {
switch (this.state.value) {
case "abstract":
case "declare":
case "enum":
case "interface":
case "module":
case "namespace":
case "type":
return true;
}
}
return false;
}
isExportDefaultSpecifier() {
if (this.tsIsDeclarationStart()) return false;
return super.isExportDefaultSpecifier();
}
parseAssignableListItem(allowModifiers, decorators) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let accessibility;
let readonly = false;
if (allowModifiers) {
accessibility = this.parseAccessModifier();
readonly = !!this.tsParseModifier(["readonly"]);
}
const left = this.parseMaybeDefault();
this.parseAssignableListItemTypes(left);
const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
if (accessibility || readonly) {
const pp = this.startNodeAt(startPos, startLoc);
if (decorators.length) {
pp.decorators = decorators;
}
if (accessibility) pp.accessibility = accessibility;
if (readonly) pp.readonly = readonly;
if (elt.type !== "Identifier" && elt.type !== "AssignmentPattern") {
throw this.raise(pp.start, "A parameter property may not be declared using a binding pattern.");
}
pp.parameter = elt;
return this.finishNode(pp, "TSParameterProperty");
}
if (decorators.length) {
left.decorators = decorators;
}
return elt;
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
if (this.match(types.colon)) {
node.returnType = this.tsParseTypeOrTypePredicateAnnotation(types.colon);
}
const bodilessType = type === "FunctionDeclaration" ? "TSDeclareFunction" : type === "ClassMethod" ? "TSDeclareMethod" : undefined;
if (bodilessType && !this.match(types.braceL) && this.isLineTerminator()) {
this.finishNode(node, bodilessType);
return;
}
super.parseFunctionBodyAndFinish(node, type, isMethod);
}
checkFunctionStatementId(node) {
if (!node.body && node.id) {
this.checkLVal(node.id, BIND_TS_FN_TYPE, null, "function name");
} else {
super.checkFunctionStatementId(...arguments);
}
}
parseSubscript(base, startPos, startLoc, noCalls, state, maybeAsyncArrow) {
if (!this.hasPrecedingLineBreak() && this.match(types.bang)) {
this.state.exprAllowed = false;
this.next();
const nonNullExpression = this.startNodeAt(startPos, startLoc);
nonNullExpression.expression = base;
return this.finishNode(nonNullExpression, "TSNonNullExpression");
}
if (this.isRelational("<")) {
const result = this.tsTryParseAndCatch(() => {
if (!noCalls && this.atPossibleAsync(base)) {
const asyncArrowFn = this.tsTryParseGenericAsyncArrowFunction(startPos, startLoc);
if (asyncArrowFn) {
return asyncArrowFn;
}
}
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
const typeArguments = this.tsParseTypeArguments();
if (typeArguments) {
if (!noCalls && this.eat(types.parenL)) {
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
node.typeParameters = typeArguments;
return this.finishCallExpression(node);
} else if (this.match(types.backQuote)) {
return this.parseTaggedTemplateExpression(startPos, startLoc, base, state, typeArguments);
}
}
this.unexpected();
});
if (result) return result;
}
return super.parseSubscript(base, startPos, startLoc, noCalls, state, maybeAsyncArrow);
}
parseNewArguments(node) {
if (this.isRelational("<")) {
const typeParameters = this.tsTryParseAndCatch(() => {
const args = this.tsParseTypeArguments();
if (!this.match(types.parenL)) this.unexpected();
return args;
});
if (typeParameters) {
node.typeParameters = typeParameters;
}
}
super.parseNewArguments(node);
}
parseExprOp(left, leftStartPos, leftStartLoc, minPrec, noIn) {
if (nonNull(types._in.binop) > minPrec && !this.hasPrecedingLineBreak() && this.isContextual("as")) {
const node = this.startNodeAt(leftStartPos, leftStartLoc);
node.expression = left;
const _const = this.tsTryNextParseConstantContext();
if (_const) {
node.typeAnnotation = _const;
} else {
node.typeAnnotation = this.tsNextThenParseType();
}
this.finishNode(node, "TSAsExpression");
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn);
}
return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec, noIn);
}
checkReservedWord(word, startLoc, checkKeywords, isBinding) {}
checkDuplicateExports() {}
parseImport(node) {
if (this.match(types.name) && this.lookahead().type === types.eq) {
return this.tsParseImportEqualsDeclaration(node);
}
return super.parseImport(node);
}
parseExport(node) {
if (this.match(types._import)) {
this.expect(types._import);
return this.tsParseImportEqualsDeclaration(node, true);
} else if (this.eat(types.eq)) {
const assign = node;
assign.expression = this.parseExpression();
this.semicolon();
return this.finishNode(assign, "TSExportAssignment");
} else if (this.eatContextual("as")) {
const decl = node;
this.expectContextual("namespace");
decl.id = this.parseIdentifier();
this.semicolon();
return this.finishNode(decl, "TSNamespaceExportDeclaration");
} else {
return super.parseExport(node);
}
}
isAbstractClass() {
return this.isContextual("abstract") && this.lookahead().type === types._class;
}
parseExportDefaultExpression() {
if (this.isAbstractClass()) {
const cls = this.startNode();
this.next();
this.parseClass(cls, true, true);
cls.abstract = true;
return cls;
}
if (this.state.value === "interface") {
const result = this.tsParseDeclaration(this.startNode(), this.state.value, true);
if (result) return result;
}
return super.parseExportDefaultExpression();
}
parseStatementContent(context, topLevel) {
if (this.state.type === types._const) {
const ahead = this.lookahead();
if (ahead.type === types.name && ahead.value === "enum") {
const node = this.startNode();
this.expect(types._const);
this.expectContextual("enum");
return this.tsParseEnumDeclaration(node, true);
}
}
return super.parseStatementContent(context, topLevel);
}
parseAccessModifier() {
return this.tsParseModifier(["public", "protected", "private"]);
}
parseClassMember(classBody, member, state, constructorAllowsSuper) {
const accessibility = this.parseAccessModifier();
if (accessibility) member.accessibility = accessibility;
super.parseClassMember(classBody, member, state, constructorAllowsSuper);
}
parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper) {
const methodOrProp = member;
const prop = member;
const propOrIdx = member;
let abstract = false,
readonly = false;
const mod = this.tsParseModifier(["abstract", "readonly"]);
switch (mod) {
case "readonly":
readonly = true;
abstract = !!this.tsParseModifier(["abstract"]);
break;
case "abstract":
abstract = true;
readonly = !!this.tsParseModifier(["readonly"]);
break;
}
if (abstract) methodOrProp.abstract = true;
if (readonly) propOrIdx.readonly = true;
if (!abstract && !isStatic && !methodOrProp.accessibility) {
const idx = this.tsTryParseIndexSignature(member);
if (idx) {
classBody.body.push(idx);
return;
}
}
if (readonly) {
methodOrProp.static = isStatic;
this.parseClassPropertyName(prop);
this.parsePostMemberNameModifiers(methodOrProp);
this.pushClassProperty(classBody, prop);
return;
}
super.parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper);
}
parsePostMemberNameModifiers(methodOrProp) {
const optional = this.eat(types.question);
if (optional) methodOrProp.optional = true;
}
parseExpressionStatement(node, expr) {
const decl = expr.type === "Identifier" ? this.tsParseExpressionStatement(node, expr) : undefined;
return decl || super.parseExpressionStatement(node, expr);
}
shouldParseExportDeclaration() {
if (this.tsIsDeclarationStart()) return true;
return super.shouldParseExportDeclaration();
}
parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos) {
if (!refNeedsArrowPos || !this.match(types.question)) {
return super.parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos);
}
const state = this.state.clone();
try {
return super.parseConditional(expr, noIn, startPos, startLoc);
} catch (err) {
if (!(err instanceof SyntaxError)) {
throw err;
}
this.state = state;
refNeedsArrowPos.start = err.pos || this.state.start;
return expr;
}
}
parseParenItem(node, startPos, startLoc) {
node = super.parseParenItem(node, startPos, startLoc);
if (this.eat(types.question)) {
node.optional = true;
this.resetEndLocation(node);
}
if (this.match(types.colon)) {
const typeCastNode = this.startNodeAt(startPos, startLoc);
typeCastNode.expression = node;
typeCastNode.typeAnnotation = this.tsParseTypeAnnotation();
return this.finishNode(typeCastNode, "TSTypeCastExpression");
}
return node;
}
parseExportDeclaration(node) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const isDeclare = this.eatContextual("declare");
let declaration;
if (this.match(types.name)) {
declaration = this.tsTryParseExportDeclaration();
}
if (!declaration) {
declaration = super.parseExportDeclaration(node);
}
if (declaration && isDeclare) {
this.resetStartLocation(declaration, startPos, startLoc);
declaration.declare = true;
}
return declaration;
}
parseClassId(node, isStatement, optionalId) {
if ((!isStatement || optionalId) && this.isContextual("implements")) {
return;
}
super.parseClassId(...arguments);
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) node.typeParameters = typeParameters;
}
parseClassProperty(node) {
if (!node.optional && this.eat(types.bang)) {
node.definite = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) node.typeAnnotation = type;
return super.parseClassProperty(node);
}
pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) method.typeParameters = typeParameters;
super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) method.typeParameters = typeParameters;
super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
}
parseClassSuper(node) {
super.parseClassSuper(node);
if (node.superClass && this.isRelational("<")) {
node.superTypeParameters = this.tsParseTypeArguments();
}
if (this.eatContextual("implements")) {
node.implements = this.tsParseHeritageClause("implements");
}
}
parseObjPropValue(prop, ...args) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) prop.typeParameters = typeParameters;
super.parseObjPropValue(prop, ...args);
}
parseFunctionParams(node, allowModifiers) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) node.typeParameters = typeParameters;
super.parseFunctionParams(node, allowModifiers);
}
parseVarId(decl, kind) {
super.parseVarId(decl, kind);
if (decl.id.type === "Identifier" && this.eat(types.bang)) {
decl.definite = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) {
decl.id.typeAnnotation = type;
this.resetEndLocation(decl.id);
}
}
parseAsyncArrowFromCallExpression(node, call) {
if (this.match(types.colon)) {
node.returnType = this.tsParseTypeAnnotation();
}
return super.parseAsyncArrowFromCallExpression(node, call);
}
parseMaybeAssign(...args) {
let jsxError;
if (this.match(types.jsxTagStart)) {
const context = this.curContext();
assert(context === types$1.j_oTag);
assert(this.state.context[this.state.context.length - 2] === types$1.j_expr);
const state = this.state.clone();
try {
return super.parseMaybeAssign(...args);
} catch (err) {
if (!(err instanceof SyntaxError)) {
throw err;
}
this.state = state;
assert(this.curContext() === types$1.j_oTag);
this.state.context.pop();
assert(this.curContext() === types$1.j_expr);
this.state.context.pop();
jsxError = err;
}
}
if (jsxError === undefined && !this.isRelational("<")) {
return super.parseMaybeAssign(...args);
}
let arrowExpression;
let typeParameters;
const state = this.state.clone();
try {
typeParameters = this.tsParseTypeParameters();
arrowExpression = super.parseMaybeAssign(...args);
if (arrowExpression.type !== "ArrowFunctionExpression" || arrowExpression.extra && arrowExpression.extra.parenthesized) {
this.unexpected();
}
} catch (err) {
if (!(err instanceof SyntaxError)) {
throw err;
}
if (jsxError) {
throw jsxError;
}
assert(!this.hasPlugin("jsx"));
this.state = state;
return super.parseMaybeAssign(...args);
}
if (typeParameters && typeParameters.params.length !== 0) {
this.resetStartLocationFromNode(arrowExpression, typeParameters);
}
arrowExpression.typeParameters = typeParameters;
return arrowExpression;
}
parseMaybeUnary(refShorthandDefaultPos) {
if (!this.hasPlugin("jsx") && this.isRelational("<")) {
return this.tsParseTypeAssertion();
} else {
return super.parseMaybeUnary(refShorthandDefaultPos);
}
}
parseArrow(node) {
if (this.match(types.colon)) {
const state = this.state.clone();
try {
const returnType = this.tsParseTypeOrTypePredicateAnnotation(types.colon);
if (this.canInsertSemicolon() || !this.match(types.arrow)) {
this.state = state;
return undefined;
}
node.returnType = returnType;
} catch (err) {
if (err instanceof SyntaxError) {
this.state = state;
} else {
throw err;
}
}
}
return super.parseArrow(node);
}
parseAssignableListItemTypes(param) {
if (this.eat(types.question)) {
if (param.type !== "Identifier") {
throw this.raise(param.start, "A binding pattern parameter cannot be optional in an implementation signature.");
}
param.optional = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) param.typeAnnotation = type;
this.resetEndLocation(param);
return param;
}
toAssignable(node, isBinding, contextDescription) {
switch (node.type) {
case "TSTypeCastExpression":
return super.toAssignable(this.typeCastToParameter(node), isBinding, contextDescription);
case "TSParameterProperty":
return super.toAssignable(node, isBinding, contextDescription);
case "TSAsExpression":
case "TSNonNullExpression":
case "TSTypeAssertion":
node.expression = this.toAssignable(node.expression, isBinding, contextDescription);
return node;
default:
return super.toAssignable(node, isBinding, contextDescription);
}
}
checkLVal(expr, bindingType = BIND_NONE, checkClashes, contextDescription) {
switch (expr.type) {
case "TSTypeCastExpression":
return;
case "TSParameterProperty":
this.checkLVal(expr.parameter, bindingType, checkClashes, "parameter property");
return;
case "TSAsExpression":
case "TSNonNullExpression":
case "TSTypeAssertion":
this.checkLVal(expr.expression, bindingType, checkClashes, contextDescription);
return;
default:
super.checkLVal(expr, bindingType, checkClashes, contextDescription);
return;
}
}
parseBindingAtom() {
switch (this.state.type) {
case types._this:
return this.parseIdentifier(true);
default:
return super.parseBindingAtom();
}
}
parseMaybeDecoratorArguments(expr) {
if (this.isRelational("<")) {
const typeArguments = this.tsParseTypeArguments();
if (this.match(types.parenL)) {
const call = super.parseMaybeDecoratorArguments(expr);
call.typeParameters = typeArguments;
return call;
}
this.unexpected(this.state.start, types.parenL);
}
return super.parseMaybeDecoratorArguments(expr);
}
isClassMethod() {
return this.isRelational("<") || super.isClassMethod();
}
isClassProperty() {
return this.match(types.bang) || this.match(types.colon) || super.isClassProperty();
}
parseMaybeDefault(...args) {
const node = super.parseMaybeDefault(...args);
if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
this.raise(node.typeAnnotation.start, "Type annotations must come before default assignments, " + "e.g. instead of `age = 25: number` use `age: number = 25`");
}
return node;
}
getTokenFromCode(code) {
if (this.state.inType && (code === 62 || code === 60)) {
return this.finishOp(types.relational, 1);
} else {
return super.getTokenFromCode(code);
}
}
toAssignableList(exprList, isBinding, contextDescription) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if (!expr) continue;
switch (expr.type) {
case "TSTypeCastExpression":
exprList[i] = this.typeCastToParameter(expr);
break;
case "TSAsExpression":
case "TSTypeAssertion":
this.raise(expr.start, "Unexpected type cast in parameter position.");
break;
}
}
return super.toAssignableList(exprList, isBinding, contextDescription);
}
typeCastToParameter(node) {
node.expression.typeAnnotation = node.typeAnnotation;
this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
return node.expression;
}
toReferencedList(exprList, isInParens) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if (expr && expr._exprListItem && expr.type === "TsTypeCastExpression") {
this.raise(expr.start, "Did not expect a type annotation here.");
}
}
return exprList;
}
shouldParseArrow() {
return this.match(types.colon) || super.shouldParseArrow();
}
shouldParseAsyncArrow() {
return this.match(types.colon) || super.shouldParseAsyncArrow();
}
canHaveLeadingDecorator() {
return super.canHaveLeadingDecorator() || this.isAbstractClass();
}
jsxParseOpeningElementAfterName(node) {
if (this.isRelational("<")) {
const typeArguments = this.tsTryParseAndCatch(() => this.tsParseTypeArguments());
if (typeArguments) node.typeParameters = typeArguments;
}
return super.jsxParseOpeningElementAfterName(node);
}
getGetterSetterExpectedParamCount(method) {
const baseCount = super.getGetterSetterExpectedParamCount(method);
const firstParam = method.params[0];
const hasContextParam = firstParam && firstParam.type === "Identifier" && firstParam.name === "this";
return hasContextParam ? baseCount + 1 : baseCount;
}
});
types.placeholder = new TokenType("%%", {
startsExpr: true
});
var placeholders = (superClass => class extends superClass {
parsePlaceholder(expectedNode) {
if (this.match(types.placeholder)) {
const node = this.startNode();
this.next();
this.assertNoSpace("Unexpected space in placeholder.");
node.name = super.parseIdentifier(true);
this.assertNoSpace("Unexpected space in placeholder.");
this.expect(types.placeholder);
return this.finishPlaceholder(node, expectedNode);
}
}
finishPlaceholder(node, expectedNode) {
const isFinished = !!(node.expectedNode && node.type === "Placeholder");
node.expectedNode = expectedNode;
return isFinished ? node : this.finishNode(node, "Placeholder");
}
getTokenFromCode(code) {
if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) {
return this.finishOp(types.placeholder, 2);
}
return super.getTokenFromCode(...arguments);
}
parseExprAtom() {
return this.parsePlaceholder("Expression") || super.parseExprAtom(...arguments);
}
parseIdentifier() {
return this.parsePlaceholder("Identifier") || super.parseIdentifier(...arguments);
}
checkReservedWord(word) {
if (word !== undefined) super.checkReservedWord(...arguments);
}
parseBindingAtom() {
return this.parsePlaceholder("Pattern") || super.parseBindingAtom(...arguments);
}
checkLVal(expr) {
if (expr.type !== "Placeholder") super.checkLVal(...arguments);
}
toAssignable(node) {
if (node && node.type === "Placeholder" && node.expectedNode === "Expression") {
node.expectedNode = "Pattern";
return node;
}
return super.toAssignable(...arguments);
}
verifyBreakContinue(node) {
if (node.label && node.label.type === "Placeholder") return;
super.verifyBreakContinue(...arguments);
}
parseExpressionStatement(node, expr) {
if (expr.type !== "Placeholder" || expr.extra && expr.extra.parenthesized) {
return super.parseExpressionStatement(...arguments);
}
if (this.match(types.colon)) {
const stmt = node;
stmt.label = this.finishPlaceholder(expr, "Identifier");
this.next();
stmt.body = this.parseStatement("label");
return this.finishNode(stmt, "LabeledStatement");
}
this.semicolon();
node.name = expr.name;
return this.finishPlaceholder(node, "Statement");
}
parseBlock() {
return this.parsePlaceholder("BlockStatement") || super.parseBlock(...arguments);
}
parseFunctionId() {
return this.parsePlaceholder("Identifier") || super.parseFunctionId(...arguments);
}
parseClass(node, isStatement, optionalId) {
const type = isStatement ? "ClassDeclaration" : "ClassExpression";
this.next();
this.takeDecorators(node);
const placeholder = this.parsePlaceholder("Identifier");
if (placeholder) {
if (this.match(types._extends) || this.match(types.placeholder) || this.match(types.braceL)) {
node.id = placeholder;
} else if (optionalId || !isStatement) {
node.id = null;
node.body = this.finishPlaceholder(placeholder, "ClassBody");
return this.finishNode(node, type);
} else {
this.unexpected(null, "A class name is required");
}
} else {
this.parseClassId(node, isStatement, optionalId);
}
this.parseClassSuper(node);
node.body = this.parsePlaceholder("ClassBody") || this.parseClassBody(!!node.superClass);
return this.finishNode(node, type);
}
parseExport(node) {
const placeholder = this.parsePlaceholder("Identifier");
if (!placeholder) return super.parseExport(...arguments);
if (!this.isContextual("from") && !this.match(types.comma)) {
node.specifiers = [];
node.source = null;
node.declaration = this.finishPlaceholder(placeholder, "Declaration");
return this.finishNode(node, "ExportNamedDeclaration");
}
this.expectPlugin("exportDefaultFrom");
const specifier = this.startNode();
specifier.exported = placeholder;
node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
return super.parseExport(node);
}
maybeParseExportDefaultSpecifier(node) {
if (node.specifiers && node.specifiers.length > 0) {
return true;
}
return super.maybeParseExportDefaultSpecifier(...arguments);
}
checkExport(node) {
const {
specifiers
} = node;
if (specifiers && specifiers.length) {
node.specifiers = specifiers.filter(node => node.exported.type === "Placeholder");
}
super.checkExport(node);
node.specifiers = specifiers;
}
parseImport(node) {
const placeholder = this.parsePlaceholder("Identifier");
if (!placeholder) return super.parseImport(...arguments);
node.specifiers = [];
if (!this.isContextual("from") && !this.match(types.comma)) {
node.source = this.finishPlaceholder(placeholder, "StringLiteral");
this.semicolon();
return this.finishNode(node, "ImportDeclaration");
}
const specifier = this.startNodeAtNode(placeholder);
specifier.local = placeholder;
this.finishNode(specifier, "ImportDefaultSpecifier");
node.specifiers.push(specifier);
if (this.eat(types.comma)) {
const hasStarImport = this.maybeParseStarImportSpecifier(node);
if (!hasStarImport) this.parseNamedImportSpecifiers(node);
}
this.expectContextual("from");
node.source = this.parseImportSource();
this.semicolon();
return this.finishNode(node, "ImportDeclaration");
}
parseImportSource() {
return this.parsePlaceholder("StringLiteral") || super.parseImportSource(...arguments);
}
});
function hasPlugin(plugins, name) {
return plugins.some(plugin => {
if (Array.isArray(plugin)) {
return plugin[0] === name;
} else {
return plugin === name;
}
});
}
function getPluginOption(plugins, name, option) {
const plugin = plugins.find(plugin => {
if (Array.isArray(plugin)) {
return plugin[0] === name;
} else {
return plugin === name;
}
});
if (plugin && Array.isArray(plugin)) {
return plugin[1][option];
}
return null;
}
const PIPELINE_PROPOSALS = ["minimal", "smart"];
function validatePlugins(plugins) {
if (hasPlugin(plugins, "decorators")) {
if (hasPlugin(plugins, "decorators-legacy")) {
throw new Error("Cannot use the decorators and decorators-legacy plugin together");
}
const decoratorsBeforeExport = getPluginOption(plugins, "decorators", "decoratorsBeforeExport");
if (decoratorsBeforeExport == null) {
throw new Error("The 'decorators' plugin requires a 'decoratorsBeforeExport' option," + " whose value must be a boolean. If you are migrating from" + " Babylon/Babel 6 or want to use the old decorators proposal, you" + " should use the 'decorators-legacy' plugin instead of 'decorators'.");
} else if (typeof decoratorsBeforeExport !== "boolean") {
throw new Error("'decoratorsBeforeExport' must be a boolean.");
}
}
if (hasPlugin(plugins, "flow") && hasPlugin(plugins, "typescript")) {
throw new Error("Cannot combine flow and typescript plugins.");
}
if (hasPlugin(plugins, "pipelineOperator") && !PIPELINE_PROPOSALS.includes(getPluginOption(plugins, "pipelineOperator", "proposal"))) {
throw new Error("'pipelineOperator' requires 'proposal' option whose value should be one of: " + PIPELINE_PROPOSALS.map(p => `'${p}'`).join(", "));
}
}
const mixinPlugins = {
estree,
jsx,
flow,
typescript,
placeholders
};
const mixinPluginNames = Object.keys(mixinPlugins);
const defaultOptions = {
sourceType: "script",
sourceFilename: undefined,
startLine: 1,
allowAwaitOutsideFunction: false,
allowReturnOutsideFunction: false,
allowImportExportEverywhere: false,
allowSuperOutsideMethod: false,
plugins: [],
strictMode: null,
ranges: false,
tokens: false,
createParenthesizedExpressions: false
};
function getOptions(opts) {
const options = {};
for (let _i = 0, _Object$keys = Object.keys(defaultOptions); _i < _Object$keys.length; _i++) {
const key = _Object$keys[_i];
options[key] = opts && opts[key] != null ? opts[key] : defaultOptions[key];
}
return options;
}
class Position {
constructor(line, col) {
this.line = line;
this.column = col;
}
}
class SourceLocation {
constructor(start, end) {
this.start = start;
this.end = end;
}
}
function getLineInfo(input, offset) {
let line = 1;
let lineStart = 0;
let match;
lineBreakG.lastIndex = 0;
while ((match = lineBreakG.exec(input)) && match.index < offset) {
line++;
lineStart = lineBreakG.lastIndex;
}
return new Position(line, offset - lineStart);
}
class BaseParser {
constructor() {
this.sawUnambiguousESM = false;
}
hasPlugin(name) {
return this.plugins.has(name);
}
getPluginOption(plugin, name) {
if (this.hasPlugin(plugin)) return this.plugins.get(plugin)[name];
}
}
function last(stack) {
return stack[stack.length - 1];
}
class CommentsParser extends BaseParser {
addComment(comment) {
if (this.filename) comment.loc.filename = this.filename;
this.state.trailingComments.push(comment);
this.state.leadingComments.push(comment);
}
processComment(node) {
if (node.type === "Program" && node.body.length > 0) return;
const stack = this.state.commentStack;
let firstChild, lastChild, trailingComments, i, j;
if (this.state.trailingComments.length > 0) {
if (this.state.trailingComments[0].start >= node.end) {
trailingComments = this.state.trailingComments;
this.state.trailingComments = [];
} else {
this.state.trailingComments.length = 0;
}
} else if (stack.length > 0) {
const lastInStack = last(stack);
if (lastInStack.trailingComments && lastInStack.trailingComments[0].start >= node.end) {
trailingComments = lastInStack.trailingComments;
delete lastInStack.trailingComments;
}
}
if (stack.length > 0 && last(stack).start >= node.start) {
firstChild = stack.pop();
}
while (stack.length > 0 && last(stack).start >= node.start) {
lastChild = stack.pop();
}
if (!lastChild && firstChild) lastChild = firstChild;
if (firstChild && this.state.leadingComments.length > 0) {
const lastComment = last(this.state.leadingComments);
if (firstChild.type === "ObjectProperty") {
if (lastComment.start >= node.start) {
if (this.state.commentPreviousNode) {
for (j = 0; j < this.state.leadingComments.length; j++) {
if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) {
this.state.leadingComments.splice(j, 1);
j--;
}
}
if (this.state.leadingComments.length > 0) {
firstChild.trailingComments = this.state.leadingComments;
this.state.leadingComments = [];
}
}
}
} else if (node.type === "CallExpression" && node.arguments && node.arguments.length) {
const lastArg = last(node.arguments);
if (lastArg && lastComment.start >= lastArg.start && lastComment.end <= node.end) {
if (this.state.commentPreviousNode) {
for (j = 0; j < this.state.leadingComments.length; j++) {
if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) {
this.state.leadingComments.splice(j, 1);
j--;
}
}
if (this.state.leadingComments.length > 0) {
lastArg.trailingComments = this.state.leadingComments;
this.state.leadingComments = [];
}
}
}
}
}
if (lastChild) {
if (lastChild.leadingComments) {
if (lastChild !== node && lastChild.leadingComments.length > 0 && last(lastChild.leadingComments).end <= node.start) {
node.leadingComments = lastChild.leadingComments;
delete lastChild.leadingComments;
} else {
for (i = lastChild.leadingComments.length - 2; i >= 0; --i) {
if (lastChild.leadingComments[i].end <= node.start) {
node.leadingComments = lastChild.leadingComments.splice(0, i + 1);
break;
}
}
}
}
} else if (this.state.leadingComments.length > 0) {
if (last(this.state.leadingComments).end <= node.start) {
if (this.state.commentPreviousNode) {
for (j = 0; j < this.state.leadingComments.length; j++) {
if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) {
this.state.leadingComments.splice(j, 1);
j--;
}
}
}
if (this.state.leadingComments.length > 0) {
node.leadingComments = this.state.leadingComments;
this.state.leadingComments = [];
}
} else {
for (i = 0; i < this.state.leadingComments.length; i++) {
if (this.state.leadingComments[i].end > node.start) {
break;
}
}
const leadingComments = this.state.leadingComments.slice(0, i);
if (leadingComments.length) {
node.leadingComments = leadingComments;
}
trailingComments = this.state.leadingComments.slice(i);
if (trailingComments.length === 0) {
trailingComments = null;
}
}
}
this.state.commentPreviousNode = node;
if (trailingComments) {
if (trailingComments.length && trailingComments[0].start >= node.start && last(trailingComments).end <= node.end) {
node.innerComments = trailingComments;
} else {
node.trailingComments = trailingComments;
}
}
stack.push(node);
}
}
class LocationParser extends CommentsParser {
getLocationForPosition(pos) {
let loc;
if (pos === this.state.start) loc = this.state.startLoc;else if (pos === this.state.lastTokStart) loc = this.state.lastTokStartLoc;else if (pos === this.state.end) loc = this.state.endLoc;else if (pos === this.state.lastTokEnd) loc = this.state.lastTokEndLoc;else loc = getLineInfo(this.input, pos);
return loc;
}
raise(pos, message, {
missingPluginNames,
code
} = {}) {
const loc = this.getLocationForPosition(pos);
message += ` (${loc.line}:${loc.column})`;
const err = new SyntaxError(message);
err.pos = pos;
err.loc = loc;
if (missingPluginNames) {
err.missingPlugin = missingPluginNames;
}
if (code !== undefined) {
err.code = code;
}
throw err;
}
}
class State {
constructor() {
this.potentialArrowAt = -1;
this.noArrowAt = [];
this.noArrowParamsConversionAt = [];
this.commaAfterSpreadAt = -1;
this.inParameters = false;
this.maybeInArrowParameters = false;
this.inPipeline = false;
this.inType = false;
this.noAnonFunctionType = false;
this.inPropertyName = false;
this.inClassProperty = false;
this.hasFlowComment = false;
this.isIterator = false;
this.topicContext = {
maxNumOfResolvableTopics: 0,
maxTopicIndex: null
};
this.classLevel = 0;
this.labels = [];
this.decoratorStack = [[]];
this.yieldPos = 0;
this.awaitPos = 0;
this.tokens = [];
this.comments = [];
this.trailingComments = [];
this.leadingComments = [];
this.commentStack = [];
this.commentPreviousNode = null;
this.pos = 0;
this.lineStart = 0;
this.type = types.eof;
this.value = null;
this.start = 0;
this.end = 0;
this.lastTokEndLoc = null;
this.lastTokStartLoc = null;
this.lastTokStart = 0;
this.lastTokEnd = 0;
this.context = [types$1.braceStatement];
this.exprAllowed = true;
this.containsEsc = false;
this.containsOctal = false;
this.octalPosition = null;
this.exportedIdentifiers = [];
this.invalidTemplateEscapePosition = null;
}
init(options) {
this.strict = options.strictMode === false ? false : options.sourceType === "module";
this.curLine = options.startLine;
this.startLoc = this.endLoc = this.curPosition();
}
curPosition() {
return new Position(this.curLine, this.pos - this.lineStart);
}
clone(skipArrays) {
const state = new State();
const keys = Object.keys(this);
for (let i = 0, length = keys.length; i < length; i++) {
const key = keys[i];
let val = this[key];
if (!skipArrays && Array.isArray(val)) {
val = val.slice();
}
state[key] = val;
}
return state;
}
}
var _isDigit = function isDigit(code) {
return code >= 48 && code <= 57;
};
const VALID_REGEX_FLAGS = new Set(["g", "m", "s", "i", "y", "u"]);
const forbiddenNumericSeparatorSiblings = {
decBinOct: [46, 66, 69, 79, 95, 98, 101, 111],
hex: [46, 88, 95, 120]
};
const allowedNumericSeparatorSiblings = {};
allowedNumericSeparatorSiblings.bin = [48, 49];
allowedNumericSeparatorSiblings.oct = [...allowedNumericSeparatorSiblings.bin, 50, 51, 52, 53, 54, 55];
allowedNumericSeparatorSiblings.dec = [...allowedNumericSeparatorSiblings.oct, 56, 57];
allowedNumericSeparatorSiblings.hex = [...allowedNumericSeparatorSiblings.dec, 65, 66, 67, 68, 69, 70, 97, 98, 99, 100, 101, 102];
class Token {
constructor(state) {
this.type = state.type;
this.value = state.value;
this.start = state.start;
this.end = state.end;
this.loc = new SourceLocation(state.startLoc, state.endLoc);
}
}
class Tokenizer extends LocationParser {
constructor(options, input) {
super();
this.state = new State();
this.state.init(options);
this.input = input;
this.length = input.length;
this.isLookahead = false;
}
next() {
if (this.options.tokens && !this.isLookahead) {
this.state.tokens.push(new Token(this.state));
}
this.state.lastTokEnd = this.state.end;
this.state.lastTokStart = this.state.start;
this.state.lastTokEndLoc = this.state.endLoc;
this.state.lastTokStartLoc = this.state.startLoc;
this.nextToken();
}
eat(type) {
if (this.match(type)) {
this.next();
return true;
} else {
return false;
}
}
match(type) {
return this.state.type === type;
}
lookahead() {
const old = this.state;
this.state = old.clone(true);
this.isLookahead = true;
this.next();
this.isLookahead = false;
const curr = this.state;
this.state = old;
return curr;
}
setStrict(strict) {
this.state.strict = strict;
if (!this.match(types.num) && !this.match(types.string)) return;
this.state.pos = this.state.start;
while (this.state.pos < this.state.lineStart) {
this.state.lineStart = this.input.lastIndexOf("\n", this.state.lineStart - 2) + 1;
--this.state.curLine;
}
this.nextToken();
}
curContext() {
return this.state.context[this.state.context.length - 1];
}
nextToken() {
const curContext = this.curContext();
if (!curContext || !curContext.preserveSpace) this.skipSpace();
this.state.containsOctal = false;
this.state.octalPosition = null;
this.state.start = this.state.pos;
this.state.startLoc = this.state.curPosition();
if (this.state.pos >= this.length) {
this.finishToken(types.eof);
return;
}
if (curContext.override) {
curContext.override(this);
} else {
this.getTokenFromCode(this.input.codePointAt(this.state.pos));
}
}
pushComment(block, text, start, end, startLoc, endLoc) {
const comment = {
type: block ? "CommentBlock" : "CommentLine",
value: text,
start: start,
end: end,
loc: new SourceLocation(startLoc, endLoc)
};
if (this.options.tokens) this.state.tokens.push(comment);
this.state.comments.push(comment);
this.addComment(comment);
}
skipBlockComment() {
const startLoc = this.state.curPosition();
const start = this.state.pos;
const end = this.input.indexOf("*/", this.state.pos += 2);
if (end === -1) this.raise(this.state.pos - 2, "Unterminated comment");
this.state.pos = end + 2;
lineBreakG.lastIndex = start;
let match;
while ((match = lineBreakG.exec(this.input)) && match.index < this.state.pos) {
++this.state.curLine;
this.state.lineStart = match.index + match[0].length;
}
if (this.isLookahead) return;
this.pushComment(true, this.input.slice(start + 2, end), start, this.state.pos, startLoc, this.state.curPosition());
}
skipLineComment(startSkip) {
const start = this.state.pos;
const startLoc = this.state.curPosition();
let ch = this.input.charCodeAt(this.state.pos += startSkip);
if (this.state.pos < this.length) {
while (ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233 && ++this.state.pos < this.length) {
ch = this.input.charCodeAt(this.state.pos);
}
}
if (this.isLookahead) return;
this.pushComment(false, this.input.slice(start + startSkip, this.state.pos), start, this.state.pos, startLoc, this.state.curPosition());
}
skipSpace() {
loop: while (this.state.pos < this.length) {
const ch = this.input.charCodeAt(this.state.pos);
switch (ch) {
case 32:
case 160:
case 9:
++this.state.pos;
break;
case 13:
if (this.input.charCodeAt(this.state.pos + 1) === 10) {
++this.state.pos;
}
case 10:
case 8232:
case 8233:
++this.state.pos;
++this.state.curLine;
this.state.lineStart = this.state.pos;
break;
case 47:
switch (this.input.charCodeAt(this.state.pos + 1)) {
case 42:
this.skipBlockComment();
break;
case 47:
this.skipLineComment(2);
break;
default:
break loop;
}
break;
default:
if (isWhitespace(ch)) {
++this.state.pos;
} else {
break loop;
}
}
}
}
finishToken(type, val) {
this.state.end = this.state.pos;
this.state.endLoc = this.state.curPosition();
const prevType = this.state.type;
this.state.type = type;
this.state.value = val;
if (!this.isLookahead) this.updateContext(prevType);
}
readToken_numberSign() {
if (this.state.pos === 0 && this.readToken_interpreter()) {
return;
}
const nextPos = this.state.pos + 1;
const next = this.input.charCodeAt(nextPos);
if (next >= 48 && next <= 57) {
this.raise(this.state.pos, "Unexpected digit after hash token");
}
if ((this.hasPlugin("classPrivateProperties") || this.hasPlugin("classPrivateMethods")) && this.state.classLevel > 0) {
++this.state.pos;
this.finishToken(types.hash);
return;
} else if (this.getPluginOption("pipelineOperator", "proposal") === "smart") {
this.finishOp(types.hash, 1);
} else {
this.raise(this.state.pos, "Unexpected character '#'");
}
}
readToken_dot() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next >= 48 && next <= 57) {
this.readNumber(true);
return;
}
const next2 = this.input.charCodeAt(this.state.pos + 2);
if (next === 46 && next2 === 46) {
this.state.pos += 3;
this.finishToken(types.ellipsis);
} else {
++this.state.pos;
this.finishToken(types.dot);
}
}
readToken_slash() {
if (this.state.exprAllowed && !this.state.inType) {
++this.state.pos;
this.readRegexp();
return;
}
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61) {
this.finishOp(types.assign, 2);
} else {
this.finishOp(types.slash, 1);
}
}
readToken_interpreter() {
if (this.state.pos !== 0 || this.length < 2) return false;
const start = this.state.pos;
this.state.pos += 1;
let ch = this.input.charCodeAt(this.state.pos);
if (ch !== 33) return false;
while (ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233 && ++this.state.pos < this.length) {
ch = this.input.charCodeAt(this.state.pos);
}
const value = this.input.slice(start + 2, this.state.pos);
this.finishToken(types.interpreterDirective, value);
return true;
}
readToken_mult_modulo(code) {
let type = code === 42 ? types.star : types.modulo;
let width = 1;
let next = this.input.charCodeAt(this.state.pos + 1);
const exprAllowed = this.state.exprAllowed;
if (code === 42 && next === 42) {
width++;
next = this.input.charCodeAt(this.state.pos + 2);
type = types.exponent;
}
if (next === 61 && !exprAllowed) {
width++;
type = types.assign;
}
this.finishOp(type, width);
}
readToken_pipe_amp(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === code) {
if (this.input.charCodeAt(this.state.pos + 2) === 61) {
this.finishOp(types.assign, 3);
} else {
this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2);
}
return;
}
if (code === 124) {
if (next === 62) {
this.finishOp(types.pipeline, 2);
return;
}
}
if (next === 61) {
this.finishOp(types.assign, 2);
return;
}
this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1);
}
readToken_caret() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61) {
this.finishOp(types.assign, 2);
} else {
this.finishOp(types.bitwiseXOR, 1);
}
}
readToken_plus_min(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === code) {
if (next === 45 && !this.inModule && this.input.charCodeAt(this.state.pos + 2) === 62 && (this.state.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.pos)))) {
this.skipLineComment(3);
this.skipSpace();
this.nextToken();
return;
}
this.finishOp(types.incDec, 2);
return;
}
if (next === 61) {
this.finishOp(types.assign, 2);
} else {
this.finishOp(types.plusMin, 1);
}
}
readToken_lt_gt(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
let size = 1;
if (next === code) {
size = code === 62 && this.input.charCodeAt(this.state.pos + 2) === 62 ? 3 : 2;
if (this.input.charCodeAt(this.state.pos + size) === 61) {
this.finishOp(types.assign, size + 1);
return;
}
this.finishOp(types.bitShift, size);
return;
}
if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.state.pos + 2) === 45 && this.input.charCodeAt(this.state.pos + 3) === 45) {
this.skipLineComment(4);
this.skipSpace();
this.nextToken();
return;
}
if (next === 61) {
size = 2;
}
this.finishOp(types.relational, size);
}
readToken_eq_excl(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61) {
this.finishOp(types.equality, this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2);
return;
}
if (code === 61 && next === 62) {
this.state.pos += 2;
this.finishToken(types.arrow);
return;
}
this.finishOp(code === 61 ? types.eq : types.bang, 1);
}
readToken_question() {
const next = this.input.charCodeAt(this.state.pos + 1);
const next2 = this.input.charCodeAt(this.state.pos + 2);
if (next === 63 && !this.state.inType) {
if (next2 === 61) {
this.finishOp(types.assign, 3);
} else {
this.finishOp(types.nullishCoalescing, 2);
}
} else if (next === 46 && !(next2 >= 48 && next2 <= 57)) {
this.state.pos += 2;
this.finishToken(types.questionDot);
} else {
++this.state.pos;
this.finishToken(types.question);
}
}
getTokenFromCode(code) {
switch (code) {
case 46:
this.readToken_dot();
return;
case 40:
++this.state.pos;
this.finishToken(types.parenL);
return;
case 41:
++this.state.pos;
this.finishToken(types.parenR);
return;
case 59:
++this.state.pos;
this.finishToken(types.semi);
return;
case 44:
++this.state.pos;
this.finishToken(types.comma);
return;
case 91:
++this.state.pos;
this.finishToken(types.bracketL);
return;
case 93:
++this.state.pos;
this.finishToken(types.bracketR);
return;
case 123:
++this.state.pos;
this.finishToken(types.braceL);
return;
case 125:
++this.state.pos;
this.finishToken(types.braceR);
return;
case 58:
if (this.hasPlugin("functionBind") && this.input.charCodeAt(this.state.pos + 1) === 58) {
this.finishOp(types.doubleColon, 2);
} else {
++this.state.pos;
this.finishToken(types.colon);
}
return;
case 63:
this.readToken_question();
return;
case 96:
++this.state.pos;
this.finishToken(types.backQuote);
return;
case 48:
{
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 120 || next === 88) {
this.readRadixNumber(16);
return;
}
if (next === 111 || next === 79) {
this.readRadixNumber(8);
return;
}
if (next === 98 || next === 66) {
this.readRadixNumber(2);
return;
}
}
case 49:
case 50:
case 51:
case 52:
case 53:
case 54:
case 55:
case 56:
case 57:
this.readNumber(false);
return;
case 34:
case 39:
this.readString(code);
return;
case 47:
this.readToken_slash();
return;
case 37:
case 42:
this.readToken_mult_modulo(code);
return;
case 124:
case 38:
this.readToken_pipe_amp(code);
return;
case 94:
this.readToken_caret();
return;
case 43:
case 45:
this.readToken_plus_min(code);
return;
case 60:
case 62:
this.readToken_lt_gt(code);
return;
case 61:
case 33:
this.readToken_eq_excl(code);
return;
case 126:
this.finishOp(types.tilde, 1);
return;
case 64:
++this.state.pos;
this.finishToken(types.at);
return;
case 35:
this.readToken_numberSign();
return;
case 92:
this.readWord();
return;
default:
if (isIdentifierStart(code)) {
this.readWord();
return;
}
}
this.raise(this.state.pos, `Unexpected character '${String.fromCodePoint(code)}'`);
}
finishOp(type, size) {
const str = this.input.slice(this.state.pos, this.state.pos + size);
this.state.pos += size;
this.finishToken(type, str);
}
readRegexp() {
const start = this.state.pos;
let escaped, inClass;
for (;;) {
if (this.state.pos >= this.length) {
this.raise(start, "Unterminated regular expression");
}
const ch = this.input.charAt(this.state.pos);
if (lineBreak.test(ch)) {
this.raise(start, "Unterminated regular expression");
}
if (escaped) {
escaped = false;
} else {
if (ch === "[") {
inClass = true;
} else if (ch === "]" && inClass) {
inClass = false;
} else if (ch === "/" && !inClass) {
break;
}
escaped = ch === "\\";
}
++this.state.pos;
}
const content = this.input.slice(start, this.state.pos);
++this.state.pos;
let mods = "";
while (this.state.pos < this.length) {
const char = this.input[this.state.pos];
const charCode = this.input.codePointAt(this.state.pos);
if (VALID_REGEX_FLAGS.has(char)) {
if (mods.indexOf(char) > -1) {
this.raise(this.state.pos + 1, "Duplicate regular expression flag");
}
++this.state.pos;
mods += char;
} else if (isIdentifierChar(charCode) || charCode === 92) {
this.raise(this.state.pos + 1, "Invalid regular expression flag");
} else {
break;
}
}
this.finishToken(types.regexp, {
pattern: content,
flags: mods
});
}
readInt(radix, len) {
const start = this.state.pos;
const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct;
const allowedSiblings = radix === 16 ? allowedNumericSeparatorSiblings.hex : radix === 10 ? allowedNumericSeparatorSiblings.dec : radix === 8 ? allowedNumericSeparatorSiblings.oct : allowedNumericSeparatorSiblings.bin;
let total = 0;
for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
const code = this.input.charCodeAt(this.state.pos);
let val;
if (this.hasPlugin("numericSeparator")) {
const prev = this.input.charCodeAt(this.state.pos - 1);
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 95) {
if (allowedSiblings.indexOf(next) === -1) {
this.raise(this.state.pos, "Invalid or unexpected token");
}
if (forbiddenSiblings.indexOf(prev) > -1 || forbiddenSiblings.indexOf(next) > -1 || Number.isNaN(next)) {
this.raise(this.state.pos, "Invalid or unexpected token");
}
++this.state.pos;
continue;
}
}
if (code >= 97) {
val = code - 97 + 10;
} else if (code >= 65) {
val = code - 65 + 10;
} else if (_isDigit(code)) {
val = code - 48;
} else {
val = Infinity;
}
if (val >= radix) break;
++this.state.pos;
total = total * radix + val;
}
if (this.state.pos === start || len != null && this.state.pos - start !== len) {
return null;
}
return total;
}
readRadixNumber(radix) {
const start = this.state.pos;
let isBigInt = false;
this.state.pos += 2;
const val = this.readInt(radix);
if (val == null) {
this.raise(this.state.start + 2, "Expected number in radix " + radix);
}
if (this.hasPlugin("bigInt")) {
if (this.input.charCodeAt(this.state.pos) === 110) {
++this.state.pos;
isBigInt = true;
}
}
if (isIdentifierStart(this.input.codePointAt(this.state.pos))) {
this.raise(this.state.pos, "Identifier directly after number");
}
if (isBigInt) {
const str = this.input.slice(start, this.state.pos).replace(/[_n]/g, "");
this.finishToken(types.bigint, str);
return;
}
this.finishToken(types.num, val);
}
readNumber(startsWithDot) {
const start = this.state.pos;
let isFloat = false;
let isBigInt = false;
if (!startsWithDot && this.readInt(10) === null) {
this.raise(start, "Invalid number");
}
let octal = this.state.pos - start >= 2 && this.input.charCodeAt(start) === 48;
if (octal) {
if (this.state.strict) {
this.raise(start, "Legacy octal literals are not allowed in strict mode");
}
if (/[89]/.test(this.input.slice(start, this.state.pos))) {
octal = false;
}
}
let next = this.input.charCodeAt(this.state.pos);
if (next === 46 && !octal) {
++this.state.pos;
this.readInt(10);
isFloat = true;
next = this.input.charCodeAt(this.state.pos);
}
if ((next === 69 || next === 101) && !octal) {
next = this.input.charCodeAt(++this.state.pos);
if (next === 43 || next === 45) {
++this.state.pos;
}
if (this.readInt(10) === null) this.raise(start, "Invalid number");
isFloat = true;
next = this.input.charCodeAt(this.state.pos);
}
if (this.hasPlugin("bigInt")) {
if (next === 110) {
if (isFloat || octal) this.raise(start, "Invalid BigIntLiteral");
++this.state.pos;
isBigInt = true;
}
}
if (isIdentifierStart(this.input.codePointAt(this.state.pos))) {
this.raise(this.state.pos, "Identifier directly after number");
}
const str = this.input.slice(start, this.state.pos).replace(/[_n]/g, "");
if (isBigInt) {
this.finishToken(types.bigint, str);
return;
}
const val = octal ? parseInt(str, 8) : parseFloat(str);
this.finishToken(types.num, val);
}
readCodePoint(throwOnInvalid) {
const ch = this.input.charCodeAt(this.state.pos);
let code;
if (ch === 123) {
const codePos = ++this.state.pos;
code = this.readHexChar(this.input.indexOf("}", this.state.pos) - this.state.pos, throwOnInvalid);
++this.state.pos;
if (code === null) {
--this.state.invalidTemplateEscapePosition;
} else if (code > 0x10ffff) {
if (throwOnInvalid) {
this.raise(codePos, "Code point out of bounds");
} else {
this.state.invalidTemplateEscapePosition = codePos - 2;
return null;
}
}
} else {
code = this.readHexChar(4, throwOnInvalid);
}
return code;
}
readString(quote) {
let out = "",
chunkStart = ++this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
this.raise(this.state.start, "Unterminated string constant");
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === quote) break;
if (ch === 92) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.readEscapedChar(false);
chunkStart = this.state.pos;
} else if (ch === 8232 || ch === 8233) {
++this.state.pos;
++this.state.curLine;
} else if (isNewLine(ch)) {
this.raise(this.state.start, "Unterminated string constant");
} else {
++this.state.pos;
}
}
out += this.input.slice(chunkStart, this.state.pos++);
this.finishToken(types.string, out);
}
readTmplToken() {
let out = "",
chunkStart = this.state.pos,
containsInvalid = false;
for (;;) {
if (this.state.pos >= this.length) {
this.raise(this.state.start, "Unterminated template");
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === 96 || ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) {
if (this.state.pos === this.state.start && this.match(types.template)) {
if (ch === 36) {
this.state.pos += 2;
this.finishToken(types.dollarBraceL);
return;
} else {
++this.state.pos;
this.finishToken(types.backQuote);
return;
}
}
out += this.input.slice(chunkStart, this.state.pos);
this.finishToken(types.template, containsInvalid ? null : out);
return;
}
if (ch === 92) {
out += this.input.slice(chunkStart, this.state.pos);
const escaped = this.readEscapedChar(true);
if (escaped === null) {
containsInvalid = true;
} else {
out += escaped;
}
chunkStart = this.state.pos;
} else if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
++this.state.pos;
switch (ch) {
case 13:
if (this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
}
case 10:
out += "\n";
break;
default:
out += String.fromCharCode(ch);
break;
}
++this.state.curLine;
this.state.lineStart = this.state.pos;
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
}
readEscapedChar(inTemplate) {
const throwOnInvalid = !inTemplate;
const ch = this.input.charCodeAt(++this.state.pos);
++this.state.pos;
switch (ch) {
case 110:
return "\n";
case 114:
return "\r";
case 120:
{
const code = this.readHexChar(2, throwOnInvalid);
return code === null ? null : String.fromCharCode(code);
}
case 117:
{
const code = this.readCodePoint(throwOnInvalid);
return code === null ? null : String.fromCodePoint(code);
}
case 116:
return "\t";
case 98:
return "\b";
case 118:
return "\u000b";
case 102:
return "\f";
case 13:
if (this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
}
case 10:
this.state.lineStart = this.state.pos;
++this.state.curLine;
case 8232:
case 8233:
return "";
default:
if (ch >= 48 && ch <= 55) {
const codePos = this.state.pos - 1;
let octalStr = this.input.substr(this.state.pos - 1, 3).match(/^[0-7]+/)[0];
let octal = parseInt(octalStr, 8);
if (octal > 255) {
octalStr = octalStr.slice(0, -1);
octal = parseInt(octalStr, 8);
}
this.state.pos += octalStr.length - 1;
const next = this.input.charCodeAt(this.state.pos);
if (octalStr !== "0" || next === 56 || next === 57) {
if (inTemplate) {
this.state.invalidTemplateEscapePosition = codePos;
return null;
} else if (this.state.strict) {
this.raise(codePos, "Octal literal in strict mode");
} else if (!this.state.containsOctal) {
this.state.containsOctal = true;
this.state.octalPosition = codePos;
}
}
return String.fromCharCode(octal);
}
return String.fromCharCode(ch);
}
}
readHexChar(len, throwOnInvalid) {
const codePos = this.state.pos;
const n = this.readInt(16, len);
if (n === null) {
if (throwOnInvalid) {
this.raise(codePos, "Bad character escape sequence");
} else {
this.state.pos = codePos - 1;
this.state.invalidTemplateEscapePosition = codePos - 1;
}
}
return n;
}
readWord1() {
let word = "";
this.state.containsEsc = false;
const start = this.state.pos;
let chunkStart = this.state.pos;
while (this.state.pos < this.length) {
const ch = this.input.codePointAt(this.state.pos);
if (isIdentifierChar(ch)) {
this.state.pos += ch <= 0xffff ? 1 : 2;
} else if (this.state.isIterator && ch === 64) {
++this.state.pos;
} else if (ch === 92) {
this.state.containsEsc = true;
word += this.input.slice(chunkStart, this.state.pos);
const escStart = this.state.pos;
const identifierCheck = this.state.pos === start ? isIdentifierStart : isIdentifierChar;
if (this.input.charCodeAt(++this.state.pos) !== 117) {
this.raise(this.state.pos, "Expecting Unicode escape sequence \\uXXXX");
}
++this.state.pos;
const esc = this.readCodePoint(true);
if (!identifierCheck(esc, true)) {
this.raise(escStart, "Invalid Unicode escape");
}
word += String.fromCodePoint(esc);
chunkStart = this.state.pos;
} else {
break;
}
}
return word + this.input.slice(chunkStart, this.state.pos);
}
isIterator(word) {
return word === "@@iterator" || word === "@@asyncIterator";
}
readWord() {
const word = this.readWord1();
const type = keywords.get(word) || types.name;
if (type.keyword && this.state.containsEsc) {
this.raise(this.state.pos, `Escape sequence in keyword ${word}`);
}
if (this.state.isIterator && (!this.isIterator(word) || !this.state.inType)) {
this.raise(this.state.pos, `Invalid identifier ${word}`);
}
this.finishToken(type, word);
}
braceIsBlock(prevType) {
const parent = this.curContext();
if (parent === types$1.functionExpression || parent === types$1.functionStatement) {
return true;
}
if (prevType === types.colon && (parent === types$1.braceStatement || parent === types$1.braceExpression)) {
return !parent.isExpr;
}
if (prevType === types._return || prevType === types.name && this.state.exprAllowed) {
return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
}
if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow) {
return true;
}
if (prevType === types.braceL) {
return parent === types$1.braceStatement;
}
if (prevType === types._var || prevType === types._const || prevType === types.name) {
return false;
}
if (prevType === types.relational) {
return true;
}
return !this.state.exprAllowed;
}
updateContext(prevType) {
const type = this.state.type;
let update;
if (type.keyword && (prevType === types.dot || prevType === types.questionDot)) {
this.state.exprAllowed = false;
} else if (update = type.updateContext) {
update.call(this, prevType);
} else {
this.state.exprAllowed = type.beforeExpr;
}
}
}
const literal = /^('|")((?:\\?.)*?)\1/;
class UtilParser extends Tokenizer {
addExtra(node, key, val) {
if (!node) return;
const extra = node.extra = node.extra || {};
extra[key] = val;
}
isRelational(op) {
return this.match(types.relational) && this.state.value === op;
}
isLookaheadRelational(op) {
const l = this.lookahead();
return l.type === types.relational && l.value === op;
}
expectRelational(op) {
if (this.isRelational(op)) {
this.next();
} else {
this.unexpected(null, types.relational);
}
}
eatRelational(op) {
if (this.isRelational(op)) {
this.next();
return true;
}
return false;
}
isContextual(name) {
return this.match(types.name) && this.state.value === name && !this.state.containsEsc;
}
isLookaheadContextual(name) {
const l = this.lookahead();
return l.type === types.name && l.value === name;
}
eatContextual(name) {
return this.isContextual(name) && this.eat(types.name);
}
expectContextual(name, message) {
if (!this.eatContextual(name)) this.unexpected(null, message);
}
canInsertSemicolon() {
return this.match(types.eof) || this.match(types.braceR) || this.hasPrecedingLineBreak();
}
hasPrecedingLineBreak() {
return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
}
isLineTerminator() {
return this.eat(types.semi) || this.canInsertSemicolon();
}
semicolon() {
if (!this.isLineTerminator()) this.unexpected(null, types.semi);
}
expect(type, pos) {
this.eat(type) || this.unexpected(pos, type);
}
assertNoSpace(message = "Unexpected space.") {
if (this.state.start > this.state.lastTokEnd) {
this.raise(this.state.lastTokEnd, message);
}
}
unexpected(pos, messageOrType = "Unexpected token") {
if (typeof messageOrType !== "string") {
messageOrType = `Unexpected token, expected "${messageOrType.label}"`;
}
throw this.raise(pos != null ? pos : this.state.start, messageOrType);
}
expectPlugin(name, pos) {
if (!this.hasPlugin(name)) {
throw this.raise(pos != null ? pos : this.state.start, `This experimental syntax requires enabling the parser plugin: '${name}'`, {
missingPluginNames: [name]
});
}
return true;
}
expectOnePlugin(names, pos) {
if (!names.some(n => this.hasPlugin(n))) {
throw this.raise(pos != null ? pos : this.state.start, `This experimental syntax requires enabling one of the following parser plugin(s): '${names.join(", ")}'`, {
missingPluginNames: names
});
}
}
checkYieldAwaitInDefaultParams() {
if (this.state.yieldPos && (!this.state.awaitPos || this.state.yieldPos < this.state.awaitPos)) {
this.raise(this.state.yieldPos, "Yield cannot be used as name inside a generator function");
}
if (this.state.awaitPos) {
this.raise(this.state.awaitPos, "Await cannot be used as name inside an async function");
}
}
strictDirective(start) {
for (;;) {
skipWhiteSpace.lastIndex = start;
start += skipWhiteSpace.exec(this.input)[0].length;
const match = literal.exec(this.input.slice(start));
if (!match) break;
if (match[2] === "use strict") return true;
start += match[0].length;
skipWhiteSpace.lastIndex = start;
start += skipWhiteSpace.exec(this.input)[0].length;
if (this.input[start] === ";") {
start++;
}
}
return false;
}
}
class Node {
constructor(parser, pos, loc) {
this.type = "";
this.start = pos;
this.end = 0;
this.loc = new SourceLocation(loc);
if (parser && parser.options.ranges) this.range = [pos, 0];
if (parser && parser.filename) this.loc.filename = parser.filename;
}
__clone() {
const newNode = new Node();
const keys = Object.keys(this);
for (let i = 0, length = keys.length; i < length; i++) {
const key = keys[i];
if (key !== "leadingComments" && key !== "trailingComments" && key !== "innerComments") {
newNode[key] = this[key];
}
}
return newNode;
}
}
class NodeUtils extends UtilParser {
startNode() {
return new Node(this, this.state.start, this.state.startLoc);
}
startNodeAt(pos, loc) {
return new Node(this, pos, loc);
}
startNodeAtNode(type) {
return this.startNodeAt(type.start, type.loc.start);
}
finishNode(node, type) {
return this.finishNodeAt(node, type, this.state.lastTokEnd, this.state.lastTokEndLoc);
}
finishNodeAt(node, type, pos, loc) {
node.type = type;
node.end = pos;
node.loc.end = loc;
if (this.options.ranges) node.range[1] = pos;
this.processComment(node);
return node;
}
resetStartLocation(node, start, startLoc) {
node.start = start;
node.loc.start = startLoc;
if (this.options.ranges) node.range[0] = start;
}
resetEndLocation(node, end = this.state.lastTokEnd, endLoc = this.state.lastTokEndLoc) {
node.end = end;
node.loc.end = endLoc;
if (this.options.ranges) node.range[1] = end;
}
resetStartLocationFromNode(node, locationNode) {
this.resetStartLocation(node, locationNode.start, locationNode.loc.start);
}
}
class LValParser extends NodeUtils {
toAssignable(node, isBinding, contextDescription) {
if (node) {
switch (node.type) {
case "Identifier":
case "ObjectPattern":
case "ArrayPattern":
case "AssignmentPattern":
break;
case "ObjectExpression":
node.type = "ObjectPattern";
for (let i = 0, length = node.properties.length, last = length - 1; i < length; i++) {
const prop = node.properties[i];
const isLast = i === last;
this.toAssignableObjectExpressionProp(prop, isBinding, isLast);
}
break;
case "ObjectProperty":
this.toAssignable(node.value, isBinding, contextDescription);
break;
case "SpreadElement":
{
this.checkToRestConversion(node);
node.type = "RestElement";
const arg = node.argument;
this.toAssignable(arg, isBinding, contextDescription);
break;
}
case "ArrayExpression":
node.type = "ArrayPattern";
this.toAssignableList(node.elements, isBinding, contextDescription);
break;
case "AssignmentExpression":
if (node.operator === "=") {
node.type = "AssignmentPattern";
delete node.operator;
} else {
this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
}
break;
case "ParenthesizedExpression":
node.expression = this.toAssignable(node.expression, isBinding, contextDescription);
break;
case "MemberExpression":
if (!isBinding) break;
default:
{
const message = "Invalid left-hand side" + (contextDescription ? " in " + contextDescription : "expression");
this.raise(node.start, message);
}
}
}
return node;
}
toAssignableObjectExpressionProp(prop, isBinding, isLast) {
if (prop.type === "ObjectMethod") {
const error = prop.kind === "get" || prop.kind === "set" ? "Object pattern can't contain getter or setter" : "Object pattern can't contain methods";
this.raise(prop.key.start, error);
} else if (prop.type === "SpreadElement" && !isLast) {
this.raiseRestNotLast(prop.start);
} else {
this.toAssignable(prop, isBinding, "object destructuring pattern");
}
}
toAssignableList(exprList, isBinding, contextDescription) {
let end = exprList.length;
if (end) {
const last = exprList[end - 1];
if (last && last.type === "RestElement") {
--end;
} else if (last && last.type === "SpreadElement") {
last.type = "RestElement";
const arg = last.argument;
this.toAssignable(arg, isBinding, contextDescription);
if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern" && arg.type !== "ObjectPattern") {
this.unexpected(arg.start);
}
--end;
}
}
for (let i = 0; i < end; i++) {
const elt = exprList[i];
if (elt) {
this.toAssignable(elt, isBinding, contextDescription);
if (elt.type === "RestElement") {
this.raiseRestNotLast(elt.start);
}
}
}
return exprList;
}
toReferencedList(exprList, isParenthesizedExpr) {
return exprList;
}
toReferencedListDeep(exprList, isParenthesizedExpr) {
this.toReferencedList(exprList, isParenthesizedExpr);
for (let _i = 0; _i < exprList.length; _i++) {
const expr = exprList[_i];
if (expr && expr.type === "ArrayExpression") {
this.toReferencedListDeep(expr.elements);
}
}
return exprList;
}
parseSpread(refShorthandDefaultPos, refNeedsArrowPos) {
const node = this.startNode();
this.next();
node.argument = this.parseMaybeAssign(false, refShorthandDefaultPos, undefined, refNeedsArrowPos);
if (this.state.commaAfterSpreadAt === -1 && this.match(types.comma)) {
this.state.commaAfterSpreadAt = this.state.start;
}
return this.finishNode(node, "SpreadElement");
}
parseRestBinding() {
const node = this.startNode();
this.next();
node.argument = this.parseBindingAtom();
return this.finishNode(node, "RestElement");
}
parseBindingAtom() {
switch (this.state.type) {
case types.bracketL:
{
const node = this.startNode();
this.next();
node.elements = this.parseBindingList(types.bracketR, true);
return this.finishNode(node, "ArrayPattern");
}
case types.braceL:
return this.parseObj(true);
}
return this.parseIdentifier();
}
parseBindingList(close, allowEmpty, allowModifiers) {
const elts = [];
let first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(types.comma);
}
if (allowEmpty && this.match(types.comma)) {
elts.push(null);
} else if (this.eat(close)) {
break;
} else if (this.match(types.ellipsis)) {
elts.push(this.parseAssignableListItemTypes(this.parseRestBinding()));
this.checkCommaAfterRest();
this.expect(close);
break;
} else {
const decorators = [];
if (this.match(types.at) && this.hasPlugin("decorators")) {
this.raise(this.state.start, "Stage 2 decorators cannot be used to decorate parameters");
}
while (this.match(types.at)) {
decorators.push(this.parseDecorator());
}
elts.push(this.parseAssignableListItem(allowModifiers, decorators));
}
}
return elts;
}
parseAssignableListItem(allowModifiers, decorators) {
const left = this.parseMaybeDefault();
this.parseAssignableListItemTypes(left);
const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
if (decorators.length) {
left.decorators = decorators;
}
return elt;
}
parseAssignableListItemTypes(param) {
return param;
}
parseMaybeDefault(startPos, startLoc, left) {
startLoc = startLoc || this.state.startLoc;
startPos = startPos || this.state.start;
left = left || this.parseBindingAtom();
if (!this.eat(types.eq)) return left;
const node = this.startNodeAt(startPos, startLoc);
node.left = left;
node.right = this.parseMaybeAssign();
return this.finishNode(node, "AssignmentPattern");
}
checkLVal(expr, bindingType = BIND_NONE, checkClashes, contextDescription) {
switch (expr.type) {
case "Identifier":
if (this.state.strict && isStrictBindReservedWord(expr.name, this.inModule)) {
this.raise(expr.start, `${bindingType === BIND_NONE ? "Assigning to" : "Binding"} '${expr.name}' in strict mode`);
}
if (checkClashes) {
const key = `_${expr.name}`;
if (checkClashes[key]) {
this.raise(expr.start, "Argument name clash");
} else {
checkClashes[key] = true;
}
}
if (!(bindingType & BIND_NONE)) {
this.scope.declareName(expr.name, bindingType, expr.start);
}
break;
case "MemberExpression":
if (bindingType !== BIND_NONE) {
this.raise(expr.start, "Binding member expression");
}
break;
case "ObjectPattern":
for (let _i2 = 0, _expr$properties = expr.properties; _i2 < _expr$properties.length; _i2++) {
let prop = _expr$properties[_i2];
if (prop.type === "ObjectProperty") prop = prop.value;
this.checkLVal(prop, bindingType, checkClashes, "object destructuring pattern");
}
break;
case "ArrayPattern":
for (let _i3 = 0, _expr$elements = expr.elements; _i3 < _expr$elements.length; _i3++) {
const elem = _expr$elements[_i3];
if (elem) {
this.checkLVal(elem, bindingType, checkClashes, "array destructuring pattern");
}
}
break;
case "AssignmentPattern":
this.checkLVal(expr.left, bindingType, checkClashes, "assignment pattern");
break;
case "RestElement":
this.checkLVal(expr.argument, bindingType, checkClashes, "rest element");
break;
case "ParenthesizedExpression":
this.checkLVal(expr.expression, bindingType, checkClashes, "parenthesized expression");
break;
default:
{
const message = (bindingType === BIND_NONE ? "Invalid" : "Binding invalid") + " left-hand side" + (contextDescription ? " in " + contextDescription : "expression");
this.raise(expr.start, message);
}
}
}
checkToRestConversion(node) {
if (node.argument.type !== "Identifier" && node.argument.type !== "MemberExpression") {
this.raise(node.argument.start, "Invalid rest operator's argument");
}
}
checkCommaAfterRest() {
if (this.match(types.comma)) {
this.raiseRestNotLast(this.state.start);
}
}
checkCommaAfterRestFromSpread() {
if (this.state.commaAfterSpreadAt > -1) {
this.raiseRestNotLast(this.state.commaAfterSpreadAt);
}
}
raiseRestNotLast(pos) {
this.raise(pos, `Rest element must be last element`);
}
}
const unwrapParenthesizedExpression = node => {
return node.type === "ParenthesizedExpression" ? unwrapParenthesizedExpression(node.expression) : node;
};
class ExpressionParser extends LValParser {
checkPropClash(prop, propHash) {
if (prop.type === "SpreadElement" || prop.computed || prop.kind || prop.shorthand) {
return;
}
const key = prop.key;
const name = key.type === "Identifier" ? key.name : String(key.value);
if (name === "__proto__") {
if (propHash.proto) {
this.raise(key.start, "Redefinition of __proto__ property");
}
propHash.proto = true;
}
}
getExpression() {
this.scope.enter(SCOPE_PROGRAM);
this.nextToken();
const expr = this.parseExpression();
if (!this.match(types.eof)) {
this.unexpected();
}
expr.comments = this.state.comments;
return expr;
}
parseExpression(noIn, refShorthandDefaultPos) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos);
if (this.match(types.comma)) {
const node = this.startNodeAt(startPos, startLoc);
node.expressions = [expr];
while (this.eat(types.comma)) {
node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos));
}
this.toReferencedList(node.expressions);
return this.finishNode(node, "SequenceExpression");
}
return expr;
}
parseMaybeAssign(noIn, refShorthandDefaultPos, afterLeftParse, refNeedsArrowPos) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
if (this.isContextual("yield")) {
if (this.scope.inGenerator) {
let left = this.parseYield(noIn);
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startPos, startLoc);
}
return left;
} else {
this.state.exprAllowed = false;
}
}
const oldCommaAfterSpreadAt = this.state.commaAfterSpreadAt;
this.state.commaAfterSpreadAt = -1;
let failOnShorthandAssign;
if (refShorthandDefaultPos) {
failOnShorthandAssign = false;
} else {
refShorthandDefaultPos = {
start: 0
};
failOnShorthandAssign = true;
}
if (this.match(types.parenL) || this.match(types.name)) {
this.state.potentialArrowAt = this.state.start;
}
let left = this.parseMaybeConditional(noIn, refShorthandDefaultPos, refNeedsArrowPos);
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startPos, startLoc);
}
if (this.state.type.isAssign) {
const node = this.startNodeAt(startPos, startLoc);
const operator = this.state.value;
node.operator = operator;
if (operator === "??=") {
this.expectPlugin("nullishCoalescingOperator");
this.expectPlugin("logicalAssignment");
}
if (operator === "||=" || operator === "&&=") {
this.expectPlugin("logicalAssignment");
}
node.left = this.match(types.eq) ? this.toAssignable(left, undefined, "assignment expression") : left;
refShorthandDefaultPos.start = 0;
this.checkLVal(left, undefined, undefined, "assignment expression");
const maybePattern = unwrapParenthesizedExpression(left);
let patternErrorMsg;
if (maybePattern.type === "ObjectPattern") {
patternErrorMsg = "`({a}) = 0` use `({a} = 0)`";
} else if (maybePattern.type === "ArrayPattern") {
patternErrorMsg = "`([a]) = 0` use `([a] = 0)`";
}
if (patternErrorMsg && (left.extra && left.extra.parenthesized || left.type === "ParenthesizedExpression")) {
this.raise(maybePattern.start, `You're trying to assign to a parenthesized expression, eg. instead of ${patternErrorMsg}`);
}
if (patternErrorMsg) this.checkCommaAfterRestFromSpread();
this.state.commaAfterSpreadAt = oldCommaAfterSpreadAt;
this.next();
node.right = this.parseMaybeAssign(noIn);
return this.finishNode(node, "AssignmentExpression");
} else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
this.state.commaAfterSpreadAt = oldCommaAfterSpreadAt;
return left;
}
parseMaybeConditional(noIn, refShorthandDefaultPos, refNeedsArrowPos) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprOps(noIn, refShorthandDefaultPos);
if (expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt) {
return expr;
}
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
return this.parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos);
}
parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos) {
if (this.eat(types.question)) {
const node = this.startNodeAt(startPos, startLoc);
node.test = expr;
node.consequent = this.parseMaybeAssign();
this.expect(types.colon);
node.alternate = this.parseMaybeAssign(noIn);
return this.finishNode(node, "ConditionalExpression");
}
return expr;
}
parseExprOps(noIn, refShorthandDefaultPos) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseMaybeUnary(refShorthandDefaultPos);
if (expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt) {
return expr;
}
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
return expr;
}
return this.parseExprOp(expr, startPos, startLoc, -1, noIn);
}
parseExprOp(left, leftStartPos, leftStartLoc, minPrec, noIn) {
const prec = this.state.type.binop;
if (prec != null && (!noIn || !this.match(types._in))) {
if (prec > minPrec) {
const node = this.startNodeAt(leftStartPos, leftStartLoc);
const operator = this.state.value;
node.left = left;
node.operator = operator;
if (operator === "**" && left.type === "UnaryExpression" && (this.options.createParenthesizedExpressions || !(left.extra && left.extra.parenthesized))) {
this.raise(left.argument.start, "Illegal expression. Wrap left hand side or entire exponentiation in parentheses.");
}
const op = this.state.type;
if (op === types.pipeline) {
this.expectPlugin("pipelineOperator");
this.state.inPipeline = true;
this.checkPipelineAtInfixOperator(left, leftStartPos);
} else if (op === types.nullishCoalescing) {
this.expectPlugin("nullishCoalescingOperator");
}
this.next();
if (op === types.pipeline && this.getPluginOption("pipelineOperator", "proposal") === "minimal") {
if (this.match(types.name) && this.state.value === "await" && this.scope.inAsync) {
throw this.raise(this.state.start, `Unexpected "await" after pipeline body; await must have parentheses in minimal proposal`);
}
}
node.right = this.parseExprOpRightExpr(op, prec, noIn);
this.finishNode(node, op === types.logicalOR || op === types.logicalAND || op === types.nullishCoalescing ? "LogicalExpression" : "BinaryExpression");
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn);
}
}
return left;
}
parseExprOpRightExpr(op, prec, noIn) {
switch (op) {
case types.pipeline:
if (this.getPluginOption("pipelineOperator", "proposal") === "smart") {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
return this.withTopicPermittingContext(() => {
return this.parseSmartPipelineBody(this.parseExprOpBaseRightExpr(op, prec, noIn), startPos, startLoc);
});
}
default:
return this.parseExprOpBaseRightExpr(op, prec, noIn);
}
}
parseExprOpBaseRightExpr(op, prec, noIn) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
return this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, op.rightAssociative ? prec - 1 : prec, noIn);
}
parseMaybeUnary(refShorthandDefaultPos) {
if (this.isContextual("await") && (this.scope.inAsync || !this.scope.inFunction && this.options.allowAwaitOutsideFunction)) {
return this.parseAwait();
} else if (this.state.type.prefix) {
const node = this.startNode();
const update = this.match(types.incDec);
node.operator = this.state.value;
node.prefix = true;
if (node.operator === "throw") {
this.expectPlugin("throwExpressions");
}
this.next();
node.argument = this.parseMaybeUnary();
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
if (update) {
this.checkLVal(node.argument, undefined, undefined, "prefix operation");
} else if (this.state.strict && node.operator === "delete") {
const arg = node.argument;
if (arg.type === "Identifier") {
this.raise(node.start, "Deleting local variable in strict mode");
} else if (arg.type === "MemberExpression" && arg.property.type === "PrivateName") {
this.raise(node.start, "Deleting a private field is not allowed");
}
}
return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
}
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let expr = this.parseExprSubscripts(refShorthandDefaultPos);
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
while (this.state.type.postfix && !this.canInsertSemicolon()) {
const node = this.startNodeAt(startPos, startLoc);
node.operator = this.state.value;
node.prefix = false;
node.argument = expr;
this.checkLVal(expr, undefined, undefined, "postfix operation");
this.next();
expr = this.finishNode(node, "UpdateExpression");
}
return expr;
}
parseExprSubscripts(refShorthandDefaultPos) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprAtom(refShorthandDefaultPos);
if (expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt) {
return expr;
}
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
return expr;
}
return this.parseSubscripts(expr, startPos, startLoc);
}
parseSubscripts(base, startPos, startLoc, noCalls) {
const maybeAsyncArrow = this.atPossibleAsync(base);
const state = {
optionalChainMember: false,
stop: false
};
do {
base = this.parseSubscript(base, startPos, startLoc, noCalls, state, maybeAsyncArrow);
} while (!state.stop);
return base;
}
parseSubscript(base, startPos, startLoc, noCalls, state, maybeAsyncArrow) {
if (!noCalls && this.eat(types.doubleColon)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.callee = this.parseNoCallExpr();
state.stop = true;
return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls);
} else if (this.match(types.questionDot)) {
this.expectPlugin("optionalChaining");
state.optionalChainMember = true;
if (noCalls && this.lookahead().type === types.parenL) {
state.stop = true;
return base;
}
this.next();
const node = this.startNodeAt(startPos, startLoc);
if (this.eat(types.bracketL)) {
node.object = base;
node.property = this.parseExpression();
node.computed = true;
node.optional = true;
this.expect(types.bracketR);
return this.finishNode(node, "OptionalMemberExpression");
} else if (this.eat(types.parenL)) {
node.callee = base;
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
node.optional = true;
return this.finishNode(node, "OptionalCallExpression");
} else {
node.object = base;
node.property = this.parseIdentifier(true);
node.computed = false;
node.optional = true;
return this.finishNode(node, "OptionalMemberExpression");
}
} else if (this.eat(types.dot)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.property = this.parseMaybePrivateName();
node.computed = false;
if (state.optionalChainMember) {
node.optional = false;
return this.finishNode(node, "OptionalMemberExpression");
}
return this.finishNode(node, "MemberExpression");
} else if (this.eat(types.bracketL)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.property = this.parseExpression();
node.computed = true;
this.expect(types.bracketR);
if (state.optionalChainMember) {
node.optional = false;
return this.finishNode(node, "OptionalMemberExpression");
}
return this.finishNode(node, "MemberExpression");
} else if (!noCalls && this.match(types.parenL)) {
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
const oldYieldPos = this.state.yieldPos;
const oldAwaitPos = this.state.awaitPos;
this.state.maybeInArrowParameters = true;
this.state.yieldPos = 0;
this.state.awaitPos = 0;
this.next();
let node = this.startNodeAt(startPos, startLoc);
node.callee = base;
const oldCommaAfterSpreadAt = this.state.commaAfterSpreadAt;
this.state.commaAfterSpreadAt = -1;
node.arguments = this.parseCallExpressionArguments(types.parenR, maybeAsyncArrow, base.type === "Import", base.type !== "Super");
if (!state.optionalChainMember) {
this.finishCallExpression(node);
} else {
this.finishOptionalCallExpression(node);
}
if (maybeAsyncArrow && this.shouldParseAsyncArrow()) {
state.stop = true;
this.checkCommaAfterRestFromSpread();
node = this.parseAsyncArrowFromCallExpression(this.startNodeAt(startPos, startLoc), node);
this.checkYieldAwaitInDefaultParams();
this.state.yieldPos = oldYieldPos;
this.state.awaitPos = oldAwaitPos;
} else {
this.toReferencedListDeep(node.arguments);
this.state.yieldPos = oldYieldPos || this.state.yieldPos;
this.state.awaitPos = oldAwaitPos || this.state.awaitPos;
}
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
this.state.commaAfterSpreadAt = oldCommaAfterSpreadAt;
return node;
} else if (this.match(types.backQuote)) {
return this.parseTaggedTemplateExpression(startPos, startLoc, base, state);
} else {
state.stop = true;
return base;
}
}
parseTaggedTemplateExpression(startPos, startLoc, base, state, typeArguments) {
const node = this.startNodeAt(startPos, startLoc);
node.tag = base;
node.quasi = this.parseTemplate(true);
if (typeArguments) node.typeParameters = typeArguments;
if (state.optionalChainMember) {
this.raise(startPos, "Tagged Template Literals are not allowed in optionalChain");
}
return this.finishNode(node, "TaggedTemplateExpression");
}
atPossibleAsync(base) {
return base.type === "Identifier" && base.name === "async" && this.state.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async";
}
finishCallExpression(node) {
if (node.callee.type === "Import") {
if (node.arguments.length !== 1) {
this.raise(node.start, "import() requires exactly one argument");
}
const importArg = node.arguments[0];
if (importArg && importArg.type === "SpreadElement") {
this.raise(importArg.start, "... is not allowed in import()");
}
}
return this.finishNode(node, "CallExpression");
}
finishOptionalCallExpression(node) {
if (node.callee.type === "Import") {
if (node.arguments.length !== 1) {
this.raise(node.start, "import() requires exactly one argument");
}
const importArg = node.arguments[0];
if (importArg && importArg.type === "SpreadElement") {
this.raise(importArg.start, "... is not allowed in import()");
}
}
return this.finishNode(node, "OptionalCallExpression");
}
parseCallExpressionArguments(close, possibleAsyncArrow, dynamicImport, allowPlaceholder) {
const elts = [];
let innerParenStart;
let first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(types.comma);
if (this.eat(close)) {
if (dynamicImport) {
this.raise(this.state.lastTokStart, "Trailing comma is disallowed inside import(...) arguments");
}
break;
}
}
if (this.match(types.parenL) && !innerParenStart) {
innerParenStart = this.state.start;
}
elts.push(this.parseExprListItem(false, possibleAsyncArrow ? {
start: 0
} : undefined, possibleAsyncArrow ? {
start: 0
} : undefined, allowPlaceholder));
}
if (possibleAsyncArrow && innerParenStart && this.shouldParseAsyncArrow()) {
this.unexpected();
}
return elts;
}
shouldParseAsyncArrow() {
return this.match(types.arrow) && !this.canInsertSemicolon();
}
parseAsyncArrowFromCallExpression(node, call) {
this.expect(types.arrow);
this.parseArrowExpression(node, call.arguments, true);
return node;
}
parseNoCallExpr() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
}
parseExprAtom(refShorthandDefaultPos) {
if (this.state.type === types.slash) this.readRegexp();
const canBeArrow = this.state.potentialArrowAt === this.state.start;
let node;
switch (this.state.type) {
case types._super:
if (!this.scope.allowSuper && !this.options.allowSuperOutsideMethod) {
this.raise(this.state.start, "super is only allowed in object methods and classes");
}
node = this.startNode();
this.next();
if (this.match(types.parenL) && !this.scope.allowDirectSuper && !this.options.allowSuperOutsideMethod) {
this.raise(node.start, "super() is only valid inside a class constructor of a subclass. " + "Maybe a typo in the method name ('constructor') or not extending another class?");
}
if (!this.match(types.parenL) && !this.match(types.bracketL) && !this.match(types.dot)) {
this.unexpected();
}
return this.finishNode(node, "Super");
case types._import:
node = this.startNode();
this.next();
if (this.match(types.dot)) {
return this.parseImportMetaProperty(node);
}
this.expectPlugin("dynamicImport", node.start);
if (!this.match(types.parenL)) {
this.unexpected(null, types.parenL);
}
return this.finishNode(node, "Import");
case types._this:
node = this.startNode();
this.next();
return this.finishNode(node, "ThisExpression");
case types.name:
{
node = this.startNode();
const containsEsc = this.state.containsEsc;
const id = this.parseIdentifier();
if (!containsEsc && id.name === "async" && this.match(types._function) && !this.canInsertSemicolon()) {
this.next();
return this.parseFunction(node, undefined, true);
} else if (canBeArrow && !containsEsc && id.name === "async" && this.match(types.name) && !this.canInsertSemicolon()) {
const params = [this.parseIdentifier()];
this.expect(types.arrow);
this.parseArrowExpression(node, params, true);
return node;
}
if (canBeArrow && this.match(types.arrow) && !this.canInsertSemicolon()) {
this.next();
this.parseArrowExpression(node, [id], false);
return node;
}
return id;
}
case types._do:
{
this.expectPlugin("doExpressions");
const node = this.startNode();
this.next();
const oldLabels = this.state.labels;
this.state.labels = [];
node.body = this.parseBlock();
this.state.labels = oldLabels;
return this.finishNode(node, "DoExpression");
}
case types.regexp:
{
const value = this.state.value;
node = this.parseLiteral(value.value, "RegExpLiteral");
node.pattern = value.pattern;
node.flags = value.flags;
return node;
}
case types.num:
return this.parseLiteral(this.state.value, "NumericLiteral");
case types.bigint:
return this.parseLiteral(this.state.value, "BigIntLiteral");
case types.string:
return this.parseLiteral(this.state.value, "StringLiteral");
case types._null:
node = this.startNode();
this.next();
return this.finishNode(node, "NullLiteral");
case types._true:
case types._false:
return this.parseBooleanLiteral();
case types.parenL:
return this.parseParenAndDistinguishExpression(canBeArrow);
case types.bracketL:
node = this.startNode();
this.next();
node.elements = this.parseExprList(types.bracketR, true, refShorthandDefaultPos);
if (!this.state.maybeInArrowParameters) {
this.toReferencedList(node.elements);
}
return this.finishNode(node, "ArrayExpression");
case types.braceL:
return this.parseObj(false, refShorthandDefaultPos);
case types._function:
return this.parseFunctionExpression();
case types.at:
this.parseDecorators();
case types._class:
node = this.startNode();
this.takeDecorators(node);
return this.parseClass(node, false);
case types._new:
return this.parseNew();
case types.backQuote:
return this.parseTemplate(false);
case types.doubleColon:
{
node = this.startNode();
this.next();
node.object = null;
const callee = node.callee = this.parseNoCallExpr();
if (callee.type === "MemberExpression") {
return this.finishNode(node, "BindExpression");
} else {
throw this.raise(callee.start, "Binding should be performed on object property.");
}
}
case types.hash:
{
if (this.state.inPipeline) {
node = this.startNode();
if (this.getPluginOption("pipelineOperator", "proposal") !== "smart") {
this.raise(node.start, "Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option.");
}
this.next();
if (this.primaryTopicReferenceIsAllowedInCurrentTopicContext()) {
this.registerTopicReference();
return this.finishNode(node, "PipelinePrimaryTopicReference");
} else {
throw this.raise(node.start, `Topic reference was used in a lexical context without topic binding`);
}
}
}
default:
throw this.unexpected();
}
}
parseBooleanLiteral() {
const node = this.startNode();
node.value = this.match(types._true);
this.next();
return this.finishNode(node, "BooleanLiteral");
}
parseMaybePrivateName() {
const isPrivate = this.match(types.hash);
if (isPrivate) {
this.expectOnePlugin(["classPrivateProperties", "classPrivateMethods"]);
const node = this.startNode();
this.next();
this.assertNoSpace("Unexpected space between # and identifier");
node.id = this.parseIdentifier(true);
return this.finishNode(node, "PrivateName");
} else {
return this.parseIdentifier(true);
}
}
parseFunctionExpression() {
const node = this.startNode();
let meta = this.startNode();
this.next();
meta = this.createIdentifier(meta, "function");
if (this.scope.inGenerator && this.eat(types.dot)) {
return this.parseMetaProperty(node, meta, "sent");
}
return this.parseFunction(node);
}
parseMetaProperty(node, meta, propertyName) {
node.meta = meta;
if (meta.name === "function" && propertyName === "sent") {
if (this.isContextual(propertyName)) {
this.expectPlugin("functionSent");
} else if (!this.hasPlugin("functionSent")) {
this.unexpected();
}
}
const containsEsc = this.state.containsEsc;
node.property = this.parseIdentifier(true);
if (node.property.name !== propertyName || containsEsc) {
this.raise(node.property.start, `The only valid meta property for ${meta.name} is ${meta.name}.${propertyName}`);
}
return this.finishNode(node, "MetaProperty");
}
parseImportMetaProperty(node) {
const id = this.createIdentifier(this.startNodeAtNode(node), "import");
this.expect(types.dot);
if (this.isContextual("meta")) {
this.expectPlugin("importMeta");
} else if (!this.hasPlugin("importMeta")) {
this.raise(id.start, `Dynamic imports require a parameter: import('a.js')`);
}
if (!this.inModule) {
this.raise(id.start, `import.meta may appear only with 'sourceType: "module"'`, {
code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED"
});
}
this.sawUnambiguousESM = true;
return this.parseMetaProperty(node, id, "meta");
}
parseLiteral(value, type, startPos, startLoc) {
startPos = startPos || this.state.start;
startLoc = startLoc || this.state.startLoc;
const node = this.startNodeAt(startPos, startLoc);
this.addExtra(node, "rawValue", value);
this.addExtra(node, "raw", this.input.slice(startPos, this.state.end));
node.value = value;
this.next();
return this.finishNode(node, type);
}
parseParenAndDistinguishExpression(canBeArrow) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let val;
this.expect(types.parenL);
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
const oldYieldPos = this.state.yieldPos;
const oldAwaitPos = this.state.awaitPos;
this.state.maybeInArrowParameters = true;
this.state.yieldPos = 0;
this.state.awaitPos = 0;
const innerStartPos = this.state.start;
const innerStartLoc = this.state.startLoc;
const exprList = [];
const refShorthandDefaultPos = {
start: 0
};
const refNeedsArrowPos = {
start: 0
};
let first = true;
let spreadStart;
let optionalCommaStart;
while (!this.match(types.parenR)) {
if (first) {
first = false;
} else {
this.expect(types.comma, refNeedsArrowPos.start || null);
if (this.match(types.parenR)) {
optionalCommaStart = this.state.start;
break;
}
}
if (this.match(types.ellipsis)) {
const spreadNodeStartPos = this.state.start;
const spreadNodeStartLoc = this.state.startLoc;
spreadStart = this.state.start;
exprList.push(this.parseParenItem(this.parseRestBinding(), spreadNodeStartPos, spreadNodeStartLoc));
this.checkCommaAfterRest();
break;
} else {
exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem, refNeedsArrowPos));
}
}
const innerEndPos = this.state.start;
const innerEndLoc = this.state.startLoc;
this.expect(types.parenR);
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
let arrowNode = this.startNodeAt(startPos, startLoc);
if (canBeArrow && this.shouldParseArrow() && (arrowNode = this.parseArrow(arrowNode))) {
this.checkYieldAwaitInDefaultParams();
this.state.yieldPos = oldYieldPos;
this.state.awaitPos = oldAwaitPos;
for (let _i = 0; _i < exprList.length; _i++) {
const param = exprList[_i];
if (param.extra && param.extra.parenthesized) {
this.unexpected(param.extra.parenStart);
}
}
this.parseArrowExpression(arrowNode, exprList, false);
return arrowNode;
}
this.state.yieldPos = oldYieldPos || this.state.yieldPos;
this.state.awaitPos = oldAwaitPos || this.state.awaitPos;
if (!exprList.length) {
this.unexpected(this.state.lastTokStart);
}
if (optionalCommaStart) this.unexpected(optionalCommaStart);
if (spreadStart) this.unexpected(spreadStart);
if (refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
if (refNeedsArrowPos.start) this.unexpected(refNeedsArrowPos.start);
this.toReferencedListDeep(exprList, true);
if (exprList.length > 1) {
val = this.startNodeAt(innerStartPos, innerStartLoc);
val.expressions = exprList;
this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
} else {
val = exprList[0];
}
if (!this.options.createParenthesizedExpressions) {
this.addExtra(val, "parenthesized", true);
this.addExtra(val, "parenStart", startPos);
return val;
}
const parenExpression = this.startNodeAt(startPos, startLoc);
parenExpression.expression = val;
this.finishNode(parenExpression, "ParenthesizedExpression");
return parenExpression;
}
shouldParseArrow() {
return !this.canInsertSemicolon();
}
parseArrow(node) {
if (this.eat(types.arrow)) {
return node;
}
}
parseParenItem(node, startPos, startLoc) {
return node;
}
parseNew() {
const node = this.startNode();
const meta = this.parseIdentifier(true);
if (this.eat(types.dot)) {
const metaProp = this.parseMetaProperty(node, meta, "target");
if (!this.scope.inNonArrowFunction && !this.state.inClassProperty) {
let error = "new.target can only be used in functions";
if (this.hasPlugin("classProperties")) {
error += " or class properties";
}
this.raise(metaProp.start, error);
}
return metaProp;
}
node.callee = this.parseNoCallExpr();
if (node.callee.type === "Import") {
this.raise(node.callee.start, "Cannot use new with import(...)");
} else if (node.callee.type === "OptionalMemberExpression" || node.callee.type === "OptionalCallExpression") {
this.raise(this.state.lastTokEnd, "constructors in/after an Optional Chain are not allowed");
} else if (this.eat(types.questionDot)) {
this.raise(this.state.start, "constructors in/after an Optional Chain are not allowed");
}
this.parseNewArguments(node);
return this.finishNode(node, "NewExpression");
}
parseNewArguments(node) {
if (this.eat(types.parenL)) {
const args = this.parseExprList(types.parenR);
this.toReferencedList(args);
node.arguments = args;
} else {
node.arguments = [];
}
}
parseTemplateElement(isTagged) {
const elem = this.startNode();
if (this.state.value === null) {
if (!isTagged) {
this.raise(this.state.invalidTemplateEscapePosition || 0, "Invalid escape sequence in template");
} else {
this.state.invalidTemplateEscapePosition = null;
}
}
elem.value = {
raw: this.input.slice(this.state.start, this.state.end).replace(/\r\n?/g, "\n"),
cooked: this.state.value
};
this.next();
elem.tail = this.match(types.backQuote);
return this.finishNode(elem, "TemplateElement");
}
parseTemplate(isTagged) {
const node = this.startNode();
this.next();
node.expressions = [];
let curElt = this.parseTemplateElement(isTagged);
node.quasis = [curElt];
while (!curElt.tail) {
this.expect(types.dollarBraceL);
node.expressions.push(this.parseExpression());
this.expect(types.braceR);
node.quasis.push(curElt = this.parseTemplateElement(isTagged));
}
this.next();
return this.finishNode(node, "TemplateLiteral");
}
parseObj(isPattern, refShorthandDefaultPos) {
const propHash = Object.create(null);
let first = true;
const node = this.startNode();
node.properties = [];
this.next();
while (!this.eat(types.braceR)) {
if (first) {
first = false;
} else {
this.expect(types.comma);
if (this.eat(types.braceR)) break;
}
const prop = this.parseObjectMember(isPattern, refShorthandDefaultPos);
if (!isPattern) this.checkPropClash(prop, propHash);
if (prop.shorthand) {
this.addExtra(prop, "shorthand", true);
}
node.properties.push(prop);
}
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression");
}
isAsyncProp(prop) {
return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" && (this.match(types.name) || this.match(types.num) || this.match(types.string) || this.match(types.bracketL) || this.state.type.keyword || this.match(types.star)) && !this.hasPrecedingLineBreak();
}
parseObjectMember(isPattern, refShorthandDefaultPos) {
let decorators = [];
if (this.match(types.at)) {
if (this.hasPlugin("decorators")) {
this.raise(this.state.start, "Stage 2 decorators disallow object literal property decorators");
} else {
while (this.match(types.at)) {
decorators.push(this.parseDecorator());
}
}
}
const prop = this.startNode();
let isGenerator = false;
let isAsync = false;
let startPos;
let startLoc;
if (this.match(types.ellipsis)) {
if (decorators.length) this.unexpected();
if (isPattern) {
this.next();
prop.argument = this.parseIdentifier();
this.checkCommaAfterRest();
return this.finishNode(prop, "RestElement");
}
return this.parseSpread();
}
if (decorators.length) {
prop.decorators = decorators;
decorators = [];
}
prop.method = false;
if (isPattern || refShorthandDefaultPos) {
startPos = this.state.start;
startLoc = this.state.startLoc;
}
if (!isPattern) {
isGenerator = this.eat(types.star);
}
const containsEsc = this.state.containsEsc;
this.parsePropertyName(prop);
if (!isPattern && !containsEsc && !isGenerator && this.isAsyncProp(prop)) {
isAsync = true;
isGenerator = this.eat(types.star);
this.parsePropertyName(prop);
} else {
isAsync = false;
}
this.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos, containsEsc);
return prop;
}
isGetterOrSetterMethod(prop, isPattern) {
return !isPattern && !prop.computed && prop.key.type === "Identifier" && (prop.key.name === "get" || prop.key.name === "set") && (this.match(types.string) || this.match(types.num) || this.match(types.bracketL) || this.match(types.name) || !!this.state.type.keyword);
}
getGetterSetterExpectedParamCount(method) {
return method.kind === "get" ? 0 : 1;
}
checkGetterSetterParams(method) {
const paramCount = this.getGetterSetterExpectedParamCount(method);
const start = method.start;
if (method.params.length !== paramCount) {
if (method.kind === "get") {
this.raise(start, "getter must not have any formal parameters");
} else {
this.raise(start, "setter must have exactly one formal parameter");
}
}
if (method.kind === "set" && method.params[method.params.length - 1].type === "RestElement") {
this.raise(start, "setter function argument must not be a rest parameter");
}
}
parseObjectMethod(prop, isGenerator, isAsync, isPattern, containsEsc) {
if (isAsync || isGenerator || this.match(types.parenL)) {
if (isPattern) this.unexpected();
prop.kind = "method";
prop.method = true;
return this.parseMethod(prop, isGenerator, isAsync, false, false, "ObjectMethod");
}
if (!containsEsc && this.isGetterOrSetterMethod(prop, isPattern)) {
if (isGenerator || isAsync) this.unexpected();
prop.kind = prop.key.name;
this.parsePropertyName(prop);
this.parseMethod(prop, false, false, false, false, "ObjectMethod");
this.checkGetterSetterParams(prop);
return prop;
}
}
parseObjectProperty(prop, startPos, startLoc, isPattern, refShorthandDefaultPos) {
prop.shorthand = false;
if (this.eat(types.colon)) {
prop.value = isPattern ? this.parseMaybeDefault(this.state.start, this.state.startLoc) : this.parseMaybeAssign(false, refShorthandDefaultPos);
return this.finishNode(prop, "ObjectProperty");
}
if (!prop.computed && prop.key.type === "Identifier") {
this.checkReservedWord(prop.key.name, prop.key.start, true, true);
if (isPattern) {
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
} else if (this.match(types.eq) && refShorthandDefaultPos) {
if (!refShorthandDefaultPos.start) {
refShorthandDefaultPos.start = this.state.start;
}
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
} else {
prop.value = prop.key.__clone();
}
prop.shorthand = true;
return this.finishNode(prop, "ObjectProperty");
}
}
parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos, containsEsc) {
const node = this.parseObjectMethod(prop, isGenerator, isAsync, isPattern, containsEsc) || this.parseObjectProperty(prop, startPos, startLoc, isPattern, refShorthandDefaultPos);
if (!node) this.unexpected();
return node;
}
parsePropertyName(prop) {
if (this.eat(types.bracketL)) {
prop.computed = true;
prop.key = this.parseMaybeAssign();
this.expect(types.bracketR);
} else {
const oldInPropertyName = this.state.inPropertyName;
this.state.inPropertyName = true;
prop.key = this.match(types.num) || this.match(types.string) ? this.parseExprAtom() : this.parseMaybePrivateName();
if (prop.key.type !== "PrivateName") {
prop.computed = false;
}
this.state.inPropertyName = oldInPropertyName;
}
return prop.key;
}
initFunction(node, isAsync) {
node.id = null;
node.generator = false;
node.async = !!isAsync;
}
parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
const oldYieldPos = this.state.yieldPos;
const oldAwaitPos = this.state.awaitPos;
this.state.yieldPos = 0;
this.state.awaitPos = 0;
this.initFunction(node, isAsync);
node.generator = !!isGenerator;
const allowModifiers = isConstructor;
this.scope.enter(functionFlags(isAsync, node.generator) | SCOPE_SUPER | (inClassScope ? SCOPE_CLASS : 0) | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0));
this.parseFunctionParams(node, allowModifiers);
this.checkYieldAwaitInDefaultParams();
this.parseFunctionBodyAndFinish(node, type, true);
this.scope.exit();
this.state.yieldPos = oldYieldPos;
this.state.awaitPos = oldAwaitPos;
return node;
}
parseArrowExpression(node, params, isAsync) {
this.scope.enter(functionFlags(isAsync, false) | SCOPE_ARROW);
this.initFunction(node, isAsync);
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
const oldYieldPos = this.state.yieldPos;
const oldAwaitPos = this.state.awaitPos;
this.state.maybeInArrowParameters = false;
this.state.yieldPos = 0;
this.state.awaitPos = 0;
if (params) this.setArrowFunctionParameters(node, params);
this.parseFunctionBody(node, true);
this.scope.exit();
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
this.state.yieldPos = oldYieldPos;
this.state.awaitPos = oldAwaitPos;
return this.finishNode(node, "ArrowFunctionExpression");
}
setArrowFunctionParameters(node, params) {
node.params = this.toAssignableList(params, true, "arrow function parameters");
}
isStrictBody(node) {
const isBlockStatement = node.body.type === "BlockStatement";
if (isBlockStatement && node.body.directives.length) {
for (let _i2 = 0, _node$body$directives = node.body.directives; _i2 < _node$body$directives.length; _i2++) {
const directive = _node$body$directives[_i2];
if (directive.value.value === "use strict") {
return true;
}
}
}
return false;
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
this.parseFunctionBody(node, false, isMethod);
this.finishNode(node, type);
}
parseFunctionBody(node, allowExpression, isMethod = false) {
const isExpression = allowExpression && !this.match(types.braceL);
const oldStrict = this.state.strict;
let useStrict = false;
const oldInParameters = this.state.inParameters;
this.state.inParameters = false;
if (isExpression) {
node.body = this.parseMaybeAssign();
this.checkParams(node, false, allowExpression);
} else {
const nonSimple = !this.isSimpleParamList(node.params);
if (!oldStrict || nonSimple) {
useStrict = this.strictDirective(this.state.end);
if (useStrict && nonSimple) {
const errorPos = (node.kind === "method" || node.kind === "constructor") && !!node.key ? node.key.end : node.start;
this.raise(errorPos, "Illegal 'use strict' directive in function with non-simple parameter list");
}
}
const oldLabels = this.state.labels;
this.state.labels = [];
if (useStrict) this.state.strict = true;
this.checkParams(node, !oldStrict && !useStrict && !allowExpression && !isMethod && !nonSimple, allowExpression);
node.body = this.parseBlock(true, false);
this.state.labels = oldLabels;
}
this.state.inParameters = oldInParameters;
if (this.state.strict && node.id) {
this.checkLVal(node.id, BIND_OUTSIDE, undefined, "function name");
}
this.state.strict = oldStrict;
}
isSimpleParamList(params) {
for (let i = 0, len = params.length; i < len; i++) {
if (params[i].type !== "Identifier") return false;
}
return true;
}
checkParams(node, allowDuplicates, isArrowFunction) {
const nameHash = Object.create(null);
for (let i = 0; i < node.params.length; i++) {
this.checkLVal(node.params[i], BIND_VAR, allowDuplicates ? null : nameHash, "function paramter list");
}
}
parseExprList(close, allowEmpty, refShorthandDefaultPos) {
const elts = [];
let first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(types.comma);
if (this.eat(close)) break;
}
elts.push(this.parseExprListItem(allowEmpty, refShorthandDefaultPos));
}
return elts;
}
parseExprListItem(allowEmpty, refShorthandDefaultPos, refNeedsArrowPos, allowPlaceholder) {
let elt;
if (allowEmpty && this.match(types.comma)) {
elt = null;
} else if (this.match(types.ellipsis)) {
const spreadNodeStartPos = this.state.start;
const spreadNodeStartLoc = this.state.startLoc;
elt = this.parseParenItem(this.parseSpread(refShorthandDefaultPos, refNeedsArrowPos), spreadNodeStartPos, spreadNodeStartLoc);
} else if (this.match(types.question)) {
this.expectPlugin("partialApplication");
if (!allowPlaceholder) {
this.raise(this.state.start, "Unexpected argument placeholder");
}
const node = this.startNode();
this.next();
elt = this.finishNode(node, "ArgumentPlaceholder");
} else {
elt = this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem, refNeedsArrowPos);
}
return elt;
}
parseIdentifier(liberal) {
const node = this.startNode();
const name = this.parseIdentifierName(node.start, liberal);
return this.createIdentifier(node, name);
}
createIdentifier(node, name) {
node.name = name;
node.loc.identifierName = name;
return this.finishNode(node, "Identifier");
}
parseIdentifierName(pos, liberal) {
let name;
if (this.match(types.name)) {
name = this.state.value;
} else if (this.state.type.keyword) {
name = this.state.type.keyword;
if ((name === "class" || name === "function") && (this.state.lastTokEnd !== this.state.lastTokStart + 1 || this.input.charCodeAt(this.state.lastTokStart) !== 46)) {
this.state.context.pop();
}
} else {
throw this.unexpected();
}
if (!liberal) {
this.checkReservedWord(name, this.state.start, !!this.state.type.keyword, false);
}
this.next();
return name;
}
checkReservedWord(word, startLoc, checkKeywords, isBinding) {
if (this.scope.inGenerator && word === "yield") {
this.raise(startLoc, "Can not use 'yield' as identifier inside a generator");
}
if (this.scope.inAsync && word === "await") {
this.raise(startLoc, "Can not use 'await' as identifier inside an async function");
}
if (this.state.inClassProperty && word === "arguments") {
this.raise(startLoc, "'arguments' is not allowed in class field initializer");
}
if (checkKeywords && isKeyword(word)) {
this.raise(startLoc, `Unexpected keyword '${word}'`);
}
const reservedTest = !this.state.strict ? isReservedWord : isBinding ? isStrictBindReservedWord : isStrictReservedWord;
if (reservedTest(word, this.inModule)) {
if (!this.scope.inAsync && word === "await") {
this.raise(startLoc, "Can not use keyword 'await' outside an async function");
}
this.raise(startLoc, `Unexpected reserved word '${word}'`);
}
}
parseAwait() {
if (!this.state.awaitPos) {
this.state.awaitPos = this.state.start;
}
const node = this.startNode();
this.next();
if (this.state.inParameters) {
this.raise(node.start, "await is not allowed in async function parameters");
}
if (this.match(types.star)) {
this.raise(node.start, "await* has been removed from the async functions proposal. Use Promise.all() instead.");
}
node.argument = this.parseMaybeUnary();
return this.finishNode(node, "AwaitExpression");
}
parseYield(noIn) {
if (!this.state.yieldPos) {
this.state.yieldPos = this.state.start;
}
const node = this.startNode();
if (this.state.inParameters) {
this.raise(node.start, "yield is not allowed in generator parameters");
}
this.next();
if (this.match(types.semi) || !this.match(types.star) && !this.state.type.startsExpr || this.canInsertSemicolon()) {
node.delegate = false;
node.argument = null;
} else {
node.delegate = this.eat(types.star);
node.argument = this.parseMaybeAssign(noIn);
}
return this.finishNode(node, "YieldExpression");
}
checkPipelineAtInfixOperator(left, leftStartPos) {
if (this.getPluginOption("pipelineOperator", "proposal") === "smart") {
if (left.type === "SequenceExpression") {
throw this.raise(leftStartPos, `Pipeline head should not be a comma-separated sequence expression`);
}
}
}
parseSmartPipelineBody(childExpression, startPos, startLoc) {
const pipelineStyle = this.checkSmartPipelineBodyStyle(childExpression);
this.checkSmartPipelineBodyEarlyErrors(childExpression, pipelineStyle, startPos);
return this.parseSmartPipelineBodyInStyle(childExpression, pipelineStyle, startPos, startLoc);
}
checkSmartPipelineBodyEarlyErrors(childExpression, pipelineStyle, startPos) {
if (this.match(types.arrow)) {
throw this.raise(this.state.start, `Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized`);
} else if (pipelineStyle === "PipelineTopicExpression" && childExpression.type === "SequenceExpression") {
throw this.raise(startPos, `Pipeline body may not be a comma-separated sequence expression`);
}
}
parseSmartPipelineBodyInStyle(childExpression, pipelineStyle, startPos, startLoc) {
const bodyNode = this.startNodeAt(startPos, startLoc);
switch (pipelineStyle) {
case "PipelineBareFunction":
bodyNode.callee = childExpression;
break;
case "PipelineBareConstructor":
bodyNode.callee = childExpression.callee;
break;
case "PipelineBareAwaitedFunction":
bodyNode.callee = childExpression.argument;
break;
case "PipelineTopicExpression":
if (!this.topicReferenceWasUsedInCurrentTopicContext()) {
throw this.raise(startPos, `Pipeline is in topic style but does not use topic reference`);
}
bodyNode.expression = childExpression;
break;
default:
throw this.raise(startPos, `Unknown pipeline style ${pipelineStyle}`);
}
return this.finishNode(bodyNode, pipelineStyle);
}
checkSmartPipelineBodyStyle(expression) {
switch (expression.type) {
default:
return this.isSimpleReference(expression) ? "PipelineBareFunction" : "PipelineTopicExpression";
}
}
isSimpleReference(expression) {
switch (expression.type) {
case "MemberExpression":
return !expression.computed && this.isSimpleReference(expression.object);
case "Identifier":
return true;
default:
return false;
}
}
withTopicPermittingContext(callback) {
const outerContextTopicState = this.state.topicContext;
this.state.topicContext = {
maxNumOfResolvableTopics: 1,
maxTopicIndex: null
};
try {
return callback();
} finally {
this.state.topicContext = outerContextTopicState;
}
}
withTopicForbiddingContext(callback) {
const outerContextTopicState = this.state.topicContext;
this.state.topicContext = {
maxNumOfResolvableTopics: 0,
maxTopicIndex: null
};
try {
return callback();
} finally {
this.state.topicContext = outerContextTopicState;
}
}
registerTopicReference() {
this.state.topicContext.maxTopicIndex = 0;
}
primaryTopicReferenceIsAllowedInCurrentTopicContext() {
return this.state.topicContext.maxNumOfResolvableTopics >= 1;
}
topicReferenceWasUsedInCurrentTopicContext() {
return this.state.topicContext.maxTopicIndex != null && this.state.topicContext.maxTopicIndex >= 0;
}
}
const loopLabel = {
kind: "loop"
},
switchLabel = {
kind: "switch"
};
const FUNC_NO_FLAGS = 0b000,
FUNC_STATEMENT = 0b001,
FUNC_HANGING_STATEMENT = 0b010,
FUNC_NULLABLE_ID = 0b100;
class StatementParser extends ExpressionParser {
parseTopLevel(file, program) {
program.sourceType = this.options.sourceType;
program.interpreter = this.parseInterpreterDirective();
this.parseBlockBody(program, true, true, types.eof);
if (this.inModule && this.scope.undefinedExports.size > 0) {
for (let _i = 0, _Array$from = Array.from(this.scope.undefinedExports); _i < _Array$from.length; _i++) {
const [name] = _Array$from[_i];
const pos = this.scope.undefinedExports.get(name);
this.raise(pos, `Export '${name}' is not defined`);
}
}
file.program = this.finishNode(program, "Program");
file.comments = this.state.comments;
if (this.options.tokens) file.tokens = this.state.tokens;
return this.finishNode(file, "File");
}
stmtToDirective(stmt) {
const expr = stmt.expression;
const directiveLiteral = this.startNodeAt(expr.start, expr.loc.start);
const directive = this.startNodeAt(stmt.start, stmt.loc.start);
const raw = this.input.slice(expr.start, expr.end);
const val = directiveLiteral.value = raw.slice(1, -1);
this.addExtra(directiveLiteral, "raw", raw);
this.addExtra(directiveLiteral, "rawValue", val);
directive.value = this.finishNodeAt(directiveLiteral, "DirectiveLiteral", expr.end, expr.loc.end);
return this.finishNodeAt(directive, "Directive", stmt.end, stmt.loc.end);
}
parseInterpreterDirective() {
if (!this.match(types.interpreterDirective)) {
return null;
}
const node = this.startNode();
node.value = this.state.value;
this.next();
return this.finishNode(node, "InterpreterDirective");
}
isLet(context) {
if (!this.isContextual("let")) {
return false;
}
skipWhiteSpace.lastIndex = this.state.pos;
const skip = skipWhiteSpace.exec(this.input);
const next = this.state.pos + skip[0].length;
const nextCh = this.input.charCodeAt(next);
if (nextCh === 91) return true;
if (context) return false;
if (nextCh === 123) return true;
if (isIdentifierStart(nextCh)) {
let pos = next + 1;
while (isIdentifierChar(this.input.charCodeAt(pos))) {
++pos;
}
const ident = this.input.slice(next, pos);
if (!keywordRelationalOperator.test(ident)) return true;
}
return false;
}
parseStatement(context, topLevel) {
if (this.match(types.at)) {
this.parseDecorators(true);
}
return this.parseStatementContent(context, topLevel);
}
parseStatementContent(context, topLevel) {
let starttype = this.state.type;
const node = this.startNode();
let kind;
if (this.isLet(context)) {
starttype = types._var;
kind = "let";
}
switch (starttype) {
case types._break:
case types._continue:
return this.parseBreakContinueStatement(node, starttype.keyword);
case types._debugger:
return this.parseDebuggerStatement(node);
case types._do:
return this.parseDoStatement(node);
case types._for:
return this.parseForStatement(node);
case types._function:
if (this.lookahead().type === types.dot) break;
if (context) {
if (this.state.strict) {
this.raise(this.state.start, "In strict mode code, functions can only be declared at top level or inside a block");
} else if (context !== "if" && context !== "label") {
this.raise(this.state.start, "In non-strict mode code, functions can only be declared at top level, " + "inside a block, or as the body of an if statement");
}
}
return this.parseFunctionStatement(node, false, !context);
case types._class:
if (context) this.unexpected();
return this.parseClass(node, true);
case types._if:
return this.parseIfStatement(node);
case types._return:
return this.parseReturnStatement(node);
case types._switch:
return this.parseSwitchStatement(node);
case types._throw:
return this.parseThrowStatement(node);
case types._try:
return this.parseTryStatement(node);
case types._const:
case types._var:
kind = kind || this.state.value;
if (context && kind !== "var") {
this.unexpected(this.state.start, "Lexical declaration cannot appear in a single-statement context");
}
return this.parseVarStatement(node, kind);
case types._while:
return this.parseWhileStatement(node);
case types._with:
return this.parseWithStatement(node);
case types.braceL:
return this.parseBlock();
case types.semi:
return this.parseEmptyStatement(node);
case types._export:
case types._import:
{
const nextToken = this.lookahead();
if (nextToken.type === types.parenL || nextToken.type === types.dot) {
break;
}
if (!this.options.allowImportExportEverywhere && !topLevel) {
this.raise(this.state.start, "'import' and 'export' may only appear at the top level");
}
this.next();
let result;
if (starttype === types._import) {
result = this.parseImport(node);
if (result.type === "ImportDeclaration" && (!result.importKind || result.importKind === "value")) {
this.sawUnambiguousESM = true;
}
} else {
result = this.parseExport(node);
if (result.type === "ExportNamedDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportAllDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportDefaultDeclaration") {
this.sawUnambiguousESM = true;
}
}
this.assertModuleNodeAllowed(node);
return result;
}
default:
{
if (this.isAsyncFunction()) {
if (context) {
this.unexpected(null, "Async functions can only be declared at the top level or inside a block");
}
this.next();
return this.parseFunctionStatement(node, true, !context);
}
}
}
const maybeName = this.state.value;
const expr = this.parseExpression();
if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) {
return this.parseLabeledStatement(node, maybeName, expr, context);
} else {
return this.parseExpressionStatement(node, expr);
}
}
assertModuleNodeAllowed(node) {
if (!this.options.allowImportExportEverywhere && !this.inModule) {
this.raise(node.start, `'import' and 'export' may appear only with 'sourceType: "module"'`, {
code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED"
});
}
}
takeDecorators(node) {
const decorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
if (decorators.length) {
node.decorators = decorators;
this.resetStartLocationFromNode(node, decorators[0]);
this.state.decoratorStack[this.state.decoratorStack.length - 1] = [];
}
}
canHaveLeadingDecorator() {
return this.match(types._class);
}
parseDecorators(allowExport) {
const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
while (this.match(types.at)) {
const decorator = this.parseDecorator();
currentContextDecorators.push(decorator);
}
if (this.match(types._export)) {
if (!allowExport) {
this.unexpected();
}
if (this.hasPlugin("decorators") && !this.getPluginOption("decorators", "decoratorsBeforeExport")) {
this.raise(this.state.start, "Using the export keyword between a decorator and a class is not allowed. " + "Please use `export @dec class` instead.");
}
} else if (!this.canHaveLeadingDecorator()) {
this.raise(this.state.start, "Leading decorators must be attached to a class declaration");
}
}
parseDecorator() {
this.expectOnePlugin(["decorators-legacy", "decorators"]);
const node = this.startNode();
this.next();
if (this.hasPlugin("decorators")) {
this.state.decoratorStack.push([]);
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let expr;
if (this.eat(types.parenL)) {
expr = this.parseExpression();
this.expect(types.parenR);
} else {
expr = this.parseIdentifier(false);
while (this.eat(types.dot)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = expr;
node.property = this.parseIdentifier(true);
node.computed = false;
expr = this.finishNode(node, "MemberExpression");
}
}
node.expression = this.parseMaybeDecoratorArguments(expr);
this.state.decoratorStack.pop();
} else {
node.expression = this.parseMaybeAssign();
}
return this.finishNode(node, "Decorator");
}
parseMaybeDecoratorArguments(expr) {
if (this.eat(types.parenL)) {
const node = this.startNodeAtNode(expr);
node.callee = expr;
node.arguments = this.parseCallExpressionArguments(types.parenR, false);
this.toReferencedList(node.arguments);
return this.finishNode(node, "CallExpression");
}
return expr;
}
parseBreakContinueStatement(node, keyword) {
const isBreak = keyword === "break";
this.next();
if (this.isLineTerminator()) {
node.label = null;
} else {
node.label = this.parseIdentifier();
this.semicolon();
}
this.verifyBreakContinue(node, keyword);
return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
}
verifyBreakContinue(node, keyword) {
const isBreak = keyword === "break";
let i;
for (i = 0; i < this.state.labels.length; ++i) {
const lab = this.state.labels[i];
if (node.label == null || lab.name === node.label.name) {
if (lab.kind != null && (isBreak || lab.kind === "loop")) break;
if (node.label && isBreak) break;
}
}
if (i === this.state.labels.length) {
this.raise(node.start, "Unsyntactic " + keyword);
}
}
parseDebuggerStatement(node) {
this.next();
this.semicolon();
return this.finishNode(node, "DebuggerStatement");
}
parseHeaderExpression() {
this.expect(types.parenL);
const val = this.parseExpression();
this.expect(types.parenR);
return val;
}
parseDoStatement(node) {
this.next();
this.state.labels.push(loopLabel);
node.body = this.withTopicForbiddingContext(() => this.parseStatement("do"));
this.state.labels.pop();
this.expect(types._while);
node.test = this.parseHeaderExpression();
this.eat(types.semi);
return this.finishNode(node, "DoWhileStatement");
}
parseForStatement(node) {
this.next();
this.state.labels.push(loopLabel);
let awaitAt = -1;
if ((this.scope.inAsync || !this.scope.inFunction && this.options.allowAwaitOutsideFunction) && this.eatContextual("await")) {
awaitAt = this.state.lastTokStart;
}
this.scope.enter(SCOPE_OTHER);
this.expect(types.parenL);
if (this.match(types.semi)) {
if (awaitAt > -1) {
this.unexpected(awaitAt);
}
return this.parseFor(node, null);
}
const isLet = this.isLet();
if (this.match(types._var) || this.match(types._const) || isLet) {
const init = this.startNode();
const kind = isLet ? "let" : this.state.value;
this.next();
this.parseVar(init, true, kind);
this.finishNode(init, "VariableDeclaration");
if ((this.match(types._in) || this.isContextual("of")) && init.declarations.length === 1) {
return this.parseForIn(node, init, awaitAt);
}
if (awaitAt > -1) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
const refShorthandDefaultPos = {
start: 0
};
const init = this.parseExpression(true, refShorthandDefaultPos);
if (this.match(types._in) || this.isContextual("of")) {
const description = this.isContextual("of") ? "for-of statement" : "for-in statement";
this.toAssignable(init, undefined, description);
this.checkLVal(init, undefined, undefined, description);
return this.parseForIn(node, init, awaitAt);
} else if (refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
if (awaitAt > -1) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
parseFunctionStatement(node, isAsync, declarationPosition) {
this.next();
return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), isAsync);
}
parseIfStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
node.consequent = this.parseStatement("if");
node.alternate = this.eat(types._else) ? this.parseStatement("if") : null;
return this.finishNode(node, "IfStatement");
}
parseReturnStatement(node) {
if (!this.scope.inFunction && !this.options.allowReturnOutsideFunction) {
this.raise(this.state.start, "'return' outside of function");
}
this.next();
if (this.isLineTerminator()) {
node.argument = null;
} else {
node.argument = this.parseExpression();
this.semicolon();
}
return this.finishNode(node, "ReturnStatement");
}
parseSwitchStatement(node) {
this.next();
node.discriminant = this.parseHeaderExpression();
const cases = node.cases = [];
this.expect(types.braceL);
this.state.labels.push(switchLabel);
this.scope.enter(SCOPE_OTHER);
let cur;
for (let sawDefault; !this.match(types.braceR);) {
if (this.match(types._case) || this.match(types._default)) {
const isCase = this.match(types._case);
if (cur) this.finishNode(cur, "SwitchCase");
cases.push(cur = this.startNode());
cur.consequent = [];
this.next();
if (isCase) {
cur.test = this.parseExpression();
} else {
if (sawDefault) {
this.raise(this.state.lastTokStart, "Multiple default clauses");
}
sawDefault = true;
cur.test = null;
}
this.expect(types.colon);
} else {
if (cur) {
cur.consequent.push(this.parseStatement(null));
} else {
this.unexpected();
}
}
}
this.scope.exit();
if (cur) this.finishNode(cur, "SwitchCase");
this.next();
this.state.labels.pop();
return this.finishNode(node, "SwitchStatement");
}
parseThrowStatement(node) {
this.next();
if (lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start))) {
this.raise(this.state.lastTokEnd, "Illegal newline after throw");
}
node.argument = this.parseExpression();
this.semicolon();
return this.finishNode(node, "ThrowStatement");
}
parseTryStatement(node) {
this.next();
node.block = this.parseBlock();
node.handler = null;
if (this.match(types._catch)) {
const clause = this.startNode();
this.next();
if (this.match(types.parenL)) {
this.expect(types.parenL);
clause.param = this.parseBindingAtom();
const simple = clause.param.type === "Identifier";
this.scope.enter(simple ? SCOPE_SIMPLE_CATCH : 0);
this.checkLVal(clause.param, BIND_LEXICAL, null, "catch clause");
this.expect(types.parenR);
} else {
clause.param = null;
this.scope.enter(SCOPE_OTHER);
}
clause.body = this.withTopicForbiddingContext(() => this.parseBlock(false, false));
this.scope.exit();
node.handler = this.finishNode(clause, "CatchClause");
}
node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
if (!node.handler && !node.finalizer) {
this.raise(node.start, "Missing catch or finally clause");
}
return this.finishNode(node, "TryStatement");
}
parseVarStatement(node, kind) {
this.next();
this.parseVar(node, false, kind);
this.semicolon();
return this.finishNode(node, "VariableDeclaration");
}
parseWhileStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
this.state.labels.push(loopLabel);
node.body = this.withTopicForbiddingContext(() => this.parseStatement("while"));
this.state.labels.pop();
return this.finishNode(node, "WhileStatement");
}
parseWithStatement(node) {
if (this.state.strict) {
this.raise(this.state.start, "'with' in strict mode");
}
this.next();
node.object = this.parseHeaderExpression();
node.body = this.withTopicForbiddingContext(() => this.parseStatement("with"));
return this.finishNode(node, "WithStatement");
}
parseEmptyStatement(node) {
this.next();
return this.finishNode(node, "EmptyStatement");
}
parseLabeledStatement(node, maybeName, expr, context) {
for (let _i2 = 0, _this$state$labels = this.state.labels; _i2 < _this$state$labels.length; _i2++) {
const label = _this$state$labels[_i2];
if (label.name === maybeName) {
this.raise(expr.start, `Label '${maybeName}' is already declared`);
}
}
const kind = this.state.type.isLoop ? "loop" : this.match(types._switch) ? "switch" : null;
for (let i = this.state.labels.length - 1; i >= 0; i--) {
const label = this.state.labels[i];
if (label.statementStart === node.start) {
label.statementStart = this.state.start;
label.kind = kind;
} else {
break;
}
}
this.state.labels.push({
name: maybeName,
kind: kind,
statementStart: this.state.start
});
node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
this.state.labels.pop();
node.label = expr;
return this.finishNode(node, "LabeledStatement");
}
parseExpressionStatement(node, expr) {
node.expression = expr;
this.semicolon();
return this.finishNode(node, "ExpressionStatement");
}
parseBlock(allowDirectives = false, createNewLexicalScope = true) {
const node = this.startNode();
this.expect(types.braceL);
if (createNewLexicalScope) {
this.scope.enter(SCOPE_OTHER);
}
this.parseBlockBody(node, allowDirectives, false, types.braceR);
if (createNewLexicalScope) {
this.scope.exit();
}
return this.finishNode(node, "BlockStatement");
}
isValidDirective(stmt) {
return stmt.type === "ExpressionStatement" && stmt.expression.type === "StringLiteral" && !stmt.expression.extra.parenthesized;
}
parseBlockBody(node, allowDirectives, topLevel, end) {
const body = node.body = [];
const directives = node.directives = [];
this.parseBlockOrModuleBlockBody(body, allowDirectives ? directives : undefined, topLevel, end);
}
parseBlockOrModuleBlockBody(body, directives, topLevel, end) {
let parsedNonDirective = false;
let oldStrict;
let octalPosition;
while (!this.eat(end)) {
if (!parsedNonDirective && this.state.containsOctal && !octalPosition) {
octalPosition = this.state.octalPosition;
}
const stmt = this.parseStatement(null, topLevel);
if (directives && !parsedNonDirective && this.isValidDirective(stmt)) {
const directive = this.stmtToDirective(stmt);
directives.push(directive);
if (oldStrict === undefined && directive.value.value === "use strict") {
oldStrict = this.state.strict;
this.setStrict(true);
if (octalPosition) {
this.raise(octalPosition, "Octal literal in strict mode");
}
}
continue;
}
parsedNonDirective = true;
body.push(stmt);
}
if (oldStrict === false) {
this.setStrict(false);
}
}
parseFor(node, init) {
node.init = init;
this.expect(types.semi);
node.test = this.match(types.semi) ? null : this.parseExpression();
this.expect(types.semi);
node.update = this.match(types.parenR) ? null : this.parseExpression();
this.expect(types.parenR);
node.body = this.withTopicForbiddingContext(() => this.parseStatement("for"));
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, "ForStatement");
}
parseForIn(node, init, awaitAt) {
const isForIn = this.match(types._in);
this.next();
if (isForIn) {
if (awaitAt > -1) this.unexpected(awaitAt);
} else {
node.await = awaitAt > -1;
}
if (init.type === "VariableDeclaration" && init.declarations[0].init != null && (!isForIn || this.state.strict || init.kind !== "var" || init.declarations[0].id.type !== "Identifier")) {
this.raise(init.start, `${isForIn ? "for-in" : "for-of"} loop variable declaration may not have an initializer`);
} else if (init.type === "AssignmentPattern") {
this.raise(init.start, "Invalid left-hand side in for-loop");
}
node.left = init;
node.right = isForIn ? this.parseExpression() : this.parseMaybeAssign();
this.expect(types.parenR);
node.body = this.withTopicForbiddingContext(() => this.parseStatement("for"));
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement");
}
parseVar(node, isFor, kind) {
const declarations = node.declarations = [];
const isTypescript = this.hasPlugin("typescript");
node.kind = kind;
for (;;) {
const decl = this.startNode();
this.parseVarId(decl, kind);
if (this.eat(types.eq)) {
decl.init = this.parseMaybeAssign(isFor);
} else {
if (kind === "const" && !(this.match(types._in) || this.isContextual("of"))) {
if (!isTypescript) {
this.unexpected();
}
} else if (decl.id.type !== "Identifier" && !(isFor && (this.match(types._in) || this.isContextual("of")))) {
this.raise(this.state.lastTokEnd, "Complex binding patterns require an initialization value");
}
decl.init = null;
}
declarations.push(this.finishNode(decl, "VariableDeclarator"));
if (!this.eat(types.comma)) break;
}
return node;
}
parseVarId(decl, kind) {
if ((kind === "const" || kind === "let") && this.isContextual("let")) {
this.unexpected(null, "let is disallowed as a lexically bound name");
}
decl.id = this.parseBindingAtom();
this.checkLVal(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, undefined, "variable declaration");
}
parseFunction(node, statement = FUNC_NO_FLAGS, isAsync = false) {
const isStatement = statement & FUNC_STATEMENT;
const isHangingStatement = statement & FUNC_HANGING_STATEMENT;
const requireId = !!isStatement && !(statement & FUNC_NULLABLE_ID);
this.initFunction(node, isAsync);
if (this.match(types.star) && isHangingStatement) {
this.unexpected(this.state.start, "Generators can only be declared at the top level or inside a block");
}
node.generator = this.eat(types.star);
if (isStatement) {
node.id = this.parseFunctionId(requireId);
}
const oldInClassProperty = this.state.inClassProperty;
const oldYieldPos = this.state.yieldPos;
const oldAwaitPos = this.state.awaitPos;
this.state.inClassProperty = false;
this.state.yieldPos = 0;
this.state.awaitPos = 0;
this.scope.enter(functionFlags(node.async, node.generator));
if (!isStatement) {
node.id = this.parseFunctionId();
}
this.parseFunctionParams(node);
this.withTopicForbiddingContext(() => {
this.parseFunctionBodyAndFinish(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
});
this.scope.exit();
if (isStatement && !isHangingStatement) {
this.checkFunctionStatementId(node);
}
this.state.inClassProperty = oldInClassProperty;
this.state.yieldPos = oldYieldPos;
this.state.awaitPos = oldAwaitPos;
return node;
}
parseFunctionId(requireId) {
return requireId || this.match(types.name) ? this.parseIdentifier() : null;
}
parseFunctionParams(node, allowModifiers) {
const oldInParameters = this.state.inParameters;
this.state.inParameters = true;
this.expect(types.parenL);
node.params = this.parseBindingList(types.parenR, false, allowModifiers);
this.state.inParameters = oldInParameters;
this.checkYieldAwaitInDefaultParams();
}
checkFunctionStatementId(node) {
if (!node.id) return;
this.checkLVal(node.id, this.state.strict || node.generator || node.async ? this.scope.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION, null, "function name");
}
parseClass(node, isStatement, optionalId) {
this.next();
this.takeDecorators(node);
const oldStrict = this.state.strict;
this.state.strict = true;
this.parseClassId(node, isStatement, optionalId);
this.parseClassSuper(node);
node.body = this.parseClassBody(!!node.superClass);
this.state.strict = oldStrict;
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
}
isClassProperty() {
return this.match(types.eq) || this.match(types.semi) || this.match(types.braceR);
}
isClassMethod() {
return this.match(types.parenL);
}
isNonstaticConstructor(method) {
return !method.computed && !method.static && (method.key.name === "constructor" || method.key.value === "constructor");
}
parseClassBody(constructorAllowsSuper) {
this.state.classLevel++;
const state = {
hadConstructor: false
};
let decorators = [];
const classBody = this.startNode();
classBody.body = [];
this.expect(types.braceL);
this.withTopicForbiddingContext(() => {
while (!this.eat(types.braceR)) {
if (this.eat(types.semi)) {
if (decorators.length > 0) {
this.raise(this.state.lastTokEnd, "Decorators must not be followed by a semicolon");
}
continue;
}
if (this.match(types.at)) {
decorators.push(this.parseDecorator());
continue;
}
const member = this.startNode();
if (decorators.length) {
member.decorators = decorators;
this.resetStartLocationFromNode(member, decorators[0]);
decorators = [];
}
this.parseClassMember(classBody, member, state, constructorAllowsSuper);
if (member.kind === "constructor" && member.decorators && member.decorators.length > 0) {
this.raise(member.start, "Decorators can't be used with a constructor. Did you mean '@dec class { ... }'?");
}
}
});
if (decorators.length) {
this.raise(this.state.start, "You have trailing decorators with no method");
}
this.state.classLevel--;
return this.finishNode(classBody, "ClassBody");
}
parseClassMember(classBody, member, state, constructorAllowsSuper) {
let isStatic = false;
const containsEsc = this.state.containsEsc;
if (this.match(types.name) && this.state.value === "static") {
const key = this.parseIdentifier(true);
if (this.isClassMethod()) {
const method = member;
method.kind = "method";
method.computed = false;
method.key = key;
method.static = false;
this.pushClassMethod(classBody, method, false, false, false, false);
return;
} else if (this.isClassProperty()) {
const prop = member;
prop.computed = false;
prop.key = key;
prop.static = false;
classBody.body.push(this.parseClassProperty(prop));
return;
} else if (containsEsc) {
throw this.unexpected();
}
isStatic = true;
}
this.parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper);
}
parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper) {
const publicMethod = member;
const privateMethod = member;
const publicProp = member;
const privateProp = member;
const method = publicMethod;
const publicMember = publicMethod;
member.static = isStatic;
if (this.eat(types.star)) {
method.kind = "method";
this.parseClassPropertyName(method);
if (method.key.type === "PrivateName") {
this.pushClassPrivateMethod(classBody, privateMethod, true, false);
return;
}
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(publicMethod.key.start, "Constructor can't be a generator");
}
this.pushClassMethod(classBody, publicMethod, true, false, false, false);
return;
}
const containsEsc = this.state.containsEsc;
const key = this.parseClassPropertyName(member);
const isPrivate = key.type === "PrivateName";
const isSimple = key.type === "Identifier";
this.parsePostMemberNameModifiers(publicMember);
if (this.isClassMethod()) {
method.kind = "method";
if (isPrivate) {
this.pushClassPrivateMethod(classBody, privateMethod, false, false);
return;
}
const isConstructor = this.isNonstaticConstructor(publicMethod);
let allowsDirectSuper = false;
if (isConstructor) {
publicMethod.kind = "constructor";
if (publicMethod.decorators) {
this.raise(publicMethod.start, "You can't attach decorators to a class constructor");
}
if (state.hadConstructor && !this.hasPlugin("typescript")) {
this.raise(key.start, "Duplicate constructor in the same class");
}
state.hadConstructor = true;
allowsDirectSuper = constructorAllowsSuper;
}
this.pushClassMethod(classBody, publicMethod, false, false, isConstructor, allowsDirectSuper);
} else if (this.isClassProperty()) {
if (isPrivate) {
this.pushClassPrivateProperty(classBody, privateProp);
} else {
this.pushClassProperty(classBody, publicProp);
}
} else if (isSimple && key.name === "async" && !containsEsc && !this.isLineTerminator()) {
const isGenerator = this.eat(types.star);
method.kind = "method";
this.parseClassPropertyName(method);
if (method.key.type === "PrivateName") {
this.pushClassPrivateMethod(classBody, privateMethod, isGenerator, true);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(publicMethod.key.start, "Constructor can't be an async function");
}
this.pushClassMethod(classBody, publicMethod, isGenerator, true, false, false);
}
} else if (isSimple && (key.name === "get" || key.name === "set") && !containsEsc && !(this.match(types.star) && this.isLineTerminator())) {
method.kind = key.name;
this.parseClassPropertyName(publicMethod);
if (method.key.type === "PrivateName") {
this.pushClassPrivateMethod(classBody, privateMethod, false, false);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(publicMethod.key.start, "Constructor can't have get/set modifier");
}
this.pushClassMethod(classBody, publicMethod, false, false, false, false);
}
this.checkGetterSetterParams(publicMethod);
} else if (this.isLineTerminator()) {
if (isPrivate) {
this.pushClassPrivateProperty(classBody, privateProp);
} else {
this.pushClassProperty(classBody, publicProp);
}
} else {
this.unexpected();
}
}
parseClassPropertyName(member) {
const key = this.parsePropertyName(member);
if (!member.computed && member.static && (key.name === "prototype" || key.value === "prototype")) {
this.raise(key.start, "Classes may not have static property named prototype");
}
if (key.type === "PrivateName" && key.id.name === "constructor") {
this.raise(key.start, "Classes may not have a private field named '#constructor'");
}
return key;
}
pushClassProperty(classBody, prop) {
if (this.isNonstaticConstructor(prop)) {
this.raise(prop.key.start, "Classes may not have a non-static field named 'constructor'");
}
classBody.body.push(this.parseClassProperty(prop));
}
pushClassPrivateProperty(classBody, prop) {
this.expectPlugin("classPrivateProperties", prop.key.start);
classBody.body.push(this.parseClassPrivateProperty(prop));
}
pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
classBody.body.push(this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true));
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
this.expectPlugin("classPrivateMethods", method.key.start);
classBody.body.push(this.parseMethod(method, isGenerator, isAsync, false, false, "ClassPrivateMethod", true));
}
parsePostMemberNameModifiers(methodOrProp) {}
parseAccessModifier() {
return undefined;
}
parseClassPrivateProperty(node) {
this.state.inClassProperty = true;
this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
node.value = this.eat(types.eq) ? this.parseMaybeAssign() : null;
this.semicolon();
this.state.inClassProperty = false;
this.scope.exit();
return this.finishNode(node, "ClassPrivateProperty");
}
parseClassProperty(node) {
if (!node.typeAnnotation) {
this.expectPlugin("classProperties");
}
this.state.inClassProperty = true;
this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
if (this.match(types.eq)) {
this.expectPlugin("classProperties");
this.next();
node.value = this.parseMaybeAssign();
} else {
node.value = null;
}
this.semicolon();
this.state.inClassProperty = false;
this.scope.exit();
return this.finishNode(node, "ClassProperty");
}
parseClassId(node, isStatement, optionalId) {
if (this.match(types.name)) {
node.id = this.parseIdentifier();
if (isStatement) {
this.checkLVal(node.id, BIND_CLASS, undefined, "class name");
}
} else {
if (optionalId || !isStatement) {
node.id = null;
} else {
this.unexpected(null, "A class name is required");
}
}
}
parseClassSuper(node) {
node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
}
parseExport(node) {
const hasDefault = this.maybeParseExportDefaultSpecifier(node);
const parseAfterDefault = !hasDefault || this.eat(types.comma);
const hasStar = parseAfterDefault && this.eatExportStar(node);
const hasNamespace = hasStar && this.maybeParseExportNamespaceSpecifier(node);
const parseAfterNamespace = parseAfterDefault && (!hasNamespace || this.eat(types.comma));
const isFromRequired = hasDefault || hasStar;
if (hasStar && !hasNamespace) {
if (hasDefault) this.unexpected();
this.parseExportFrom(node, true);
return this.finishNode(node, "ExportAllDeclaration");
}
const hasSpecifiers = this.maybeParseExportNamedSpecifiers(node);
if (hasDefault && parseAfterDefault && !hasStar && !hasSpecifiers || hasNamespace && parseAfterNamespace && !hasSpecifiers) {
throw this.unexpected(null, types.braceL);
}
let hasDeclaration;
if (isFromRequired || hasSpecifiers) {
hasDeclaration = false;
this.parseExportFrom(node, isFromRequired);
} else {
hasDeclaration = this.maybeParseExportDeclaration(node);
}
if (isFromRequired || hasSpecifiers || hasDeclaration) {
this.checkExport(node, true, false, !!node.source);
return this.finishNode(node, "ExportNamedDeclaration");
}
if (this.eat(types._default)) {
node.declaration = this.parseExportDefaultExpression();
this.checkExport(node, true, true);
return this.finishNode(node, "ExportDefaultDeclaration");
}
throw this.unexpected(null, types.braceL);
}
eatExportStar(node) {
return this.eat(types.star);
}
maybeParseExportDefaultSpecifier(node) {
if (this.isExportDefaultSpecifier()) {
this.expectPlugin("exportDefaultFrom");
const specifier = this.startNode();
specifier.exported = this.parseIdentifier(true);
node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
return true;
}
return false;
}
maybeParseExportNamespaceSpecifier(node) {
if (this.isContextual("as")) {
if (!node.specifiers) node.specifiers = [];
this.expectPlugin("exportNamespaceFrom");
const specifier = this.startNodeAt(this.state.lastTokStart, this.state.lastTokStartLoc);
this.next();
specifier.exported = this.parseIdentifier(true);
node.specifiers.push(this.finishNode(specifier, "ExportNamespaceSpecifier"));
return true;
}
return false;
}
maybeParseExportNamedSpecifiers(node) {
if (this.match(types.braceL)) {
if (!node.specifiers) node.specifiers = [];
node.specifiers.push(...this.parseExportSpecifiers());
node.source = null;
node.declaration = null;
return true;
}
return false;
}
maybeParseExportDeclaration(node) {
if (this.shouldParseExportDeclaration()) {
if (this.isContextual("async")) {
const next = this.lookahead();
if (next.type !== types._function) {
this.unexpected(next.start, `Unexpected token, expected "function"`);
}
}
node.specifiers = [];
node.source = null;
node.declaration = this.parseExportDeclaration(node);
return true;
}
return false;
}
isAsyncFunction() {
if (!this.isContextual("async")) return false;
const {
pos
} = this.state;
skipWhiteSpace.lastIndex = pos;
const skip = skipWhiteSpace.exec(this.input);
if (!skip || !skip.length) return false;
const next = pos + skip[0].length;
return !lineBreak.test(this.input.slice(pos, next)) && this.input.slice(next, next + 8) === "function" && (next + 8 === this.length || !isIdentifierChar(this.input.charCodeAt(next + 8)));
}
parseExportDefaultExpression() {
const expr = this.startNode();
const isAsync = this.isAsyncFunction();
if (this.match(types._function) || isAsync) {
this.next();
if (isAsync) {
this.next();
}
return this.parseFunction(expr, FUNC_STATEMENT | FUNC_NULLABLE_ID, isAsync);
} else if (this.match(types._class)) {
return this.parseClass(expr, true, true);
} else if (this.match(types.at)) {
if (this.hasPlugin("decorators") && this.getPluginOption("decorators", "decoratorsBeforeExport")) {
this.unexpected(this.state.start, "Decorators must be placed *before* the 'export' keyword." + " You can set the 'decoratorsBeforeExport' option to false to use" + " the 'export @decorator class {}' syntax");
}
this.parseDecorators(false);
return this.parseClass(expr, true, true);
} else if (this.match(types._const) || this.match(types._var) || this.isLet()) {
return this.raise(this.state.start, "Only expressions, functions or classes are allowed as the `default` export.");
} else {
const res = this.parseMaybeAssign();
this.semicolon();
return res;
}
}
parseExportDeclaration(node) {
return this.parseStatement(null);
}
isExportDefaultSpecifier() {
if (this.match(types.name)) {
return this.state.value !== "async" && this.state.value !== "let";
}
if (!this.match(types._default)) {
return false;
}
const lookahead = this.lookahead();
return lookahead.type === types.comma || lookahead.type === types.name && lookahead.value === "from";
}
parseExportFrom(node, expect) {
if (this.eatContextual("from")) {
node.source = this.parseImportSource();
this.checkExport(node);
} else {
if (expect) {
this.unexpected();
} else {
node.source = null;
}
}
this.semicolon();
}
shouldParseExportDeclaration() {
if (this.match(types.at)) {
this.expectOnePlugin(["decorators", "decorators-legacy"]);
if (this.hasPlugin("decorators")) {
if (this.getPluginOption("decorators", "decoratorsBeforeExport")) {
this.unexpected(this.state.start, "Decorators must be placed *before* the 'export' keyword." + " You can set the 'decoratorsBeforeExport' option to false to use" + " the 'export @decorator class {}' syntax");
} else {
return true;
}
}
}
return this.state.type.keyword === "var" || this.state.type.keyword === "const" || this.state.type.keyword === "function" || this.state.type.keyword === "class" || this.isLet() || this.isAsyncFunction();
}
checkExport(node, checkNames, isDefault, isFrom) {
if (checkNames) {
if (isDefault) {
this.checkDuplicateExports(node, "default");
} else if (node.specifiers && node.specifiers.length) {
for (let _i3 = 0, _node$specifiers = node.specifiers; _i3 < _node$specifiers.length; _i3++) {
const specifier = _node$specifiers[_i3];
this.checkDuplicateExports(specifier, specifier.exported.name);
if (!isFrom && specifier.local) {
this.checkReservedWord(specifier.local.name, specifier.local.start, true, false);
this.scope.checkLocalExport(specifier.local);
}
}
} else if (node.declaration) {
if (node.declaration.type === "FunctionDeclaration" || node.declaration.type === "ClassDeclaration") {
const id = node.declaration.id;
if (!id) throw new Error("Assertion failure");
this.checkDuplicateExports(node, id.name);
} else if (node.declaration.type === "VariableDeclaration") {
for (let _i4 = 0, _node$declaration$dec = node.declaration.declarations; _i4 < _node$declaration$dec.length; _i4++) {
const declaration = _node$declaration$dec[_i4];
this.checkDeclaration(declaration.id);
}
}
}
}
const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
if (currentContextDecorators.length) {
const isClass = node.declaration && (node.declaration.type === "ClassDeclaration" || node.declaration.type === "ClassExpression");
if (!node.declaration || !isClass) {
throw this.raise(node.start, "You can only use decorators on an export when exporting a class");
}
this.takeDecorators(node.declaration);
}
}
checkDeclaration(node) {
if (node.type === "Identifier") {
this.checkDuplicateExports(node, node.name);
} else if (node.type === "ObjectPattern") {
for (let _i5 = 0, _node$properties = node.properties; _i5 < _node$properties.length; _i5++) {
const prop = _node$properties[_i5];
this.checkDeclaration(prop);
}
} else if (node.type === "ArrayPattern") {
for (let _i6 = 0, _node$elements = node.elements; _i6 < _node$elements.length; _i6++) {
const elem = _node$elements[_i6];
if (elem) {
this.checkDeclaration(elem);
}
}
} else if (node.type === "ObjectProperty") {
this.checkDeclaration(node.value);
} else if (node.type === "RestElement") {
this.checkDeclaration(node.argument);
} else if (node.type === "AssignmentPattern") {
this.checkDeclaration(node.left);
}
}
checkDuplicateExports(node, name) {
if (this.state.exportedIdentifiers.indexOf(name) > -1) {
throw this.raise(node.start, name === "default" ? "Only one default export allowed per module." : `\`${name}\` has already been exported. Exported identifiers must be unique.`);
}
this.state.exportedIdentifiers.push(name);
}
parseExportSpecifiers() {
const nodes = [];
let first = true;
this.expect(types.braceL);
while (!this.eat(types.braceR)) {
if (first) {
first = false;
} else {
this.expect(types.comma);
if (this.eat(types.braceR)) break;
}
const node = this.startNode();
node.local = this.parseIdentifier(true);
node.exported = this.eatContextual("as") ? this.parseIdentifier(true) : node.local.__clone();
nodes.push(this.finishNode(node, "ExportSpecifier"));
}
return nodes;
}
parseImport(node) {
node.specifiers = [];
if (!this.match(types.string)) {
const hasDefault = this.maybeParseDefaultImportSpecifier(node);
const parseNext = !hasDefault || this.eat(types.comma);
const hasStar = parseNext && this.maybeParseStarImportSpecifier(node);
if (parseNext && !hasStar) this.parseNamedImportSpecifiers(node);
this.expectContextual("from");
}
node.source = this.parseImportSource();
this.semicolon();
return this.finishNode(node, "ImportDeclaration");
}
parseImportSource() {
if (!this.match(types.string)) this.unexpected();
return this.parseExprAtom();
}
shouldParseDefaultImport(node) {
return this.match(types.name);
}
parseImportSpecifierLocal(node, specifier, type, contextDescription) {
specifier.local = this.parseIdentifier();
this.checkLVal(specifier.local, BIND_LEXICAL, undefined, contextDescription);
node.specifiers.push(this.finishNode(specifier, type));
}
maybeParseDefaultImportSpecifier(node) {
if (this.shouldParseDefaultImport(node)) {
this.parseImportSpecifierLocal(node, this.startNode(), "ImportDefaultSpecifier", "default import specifier");
return true;
}
return false;
}
maybeParseStarImportSpecifier(node) {
if (this.match(types.star)) {
const specifier = this.startNode();
this.next();
this.expectContextual("as");
this.parseImportSpecifierLocal(node, specifier, "ImportNamespaceSpecifier", "import namespace specifier");
return true;
}
return false;
}
parseNamedImportSpecifiers(node) {
let first = true;
this.expect(types.braceL);
while (!this.eat(types.braceR)) {
if (first) {
first = false;
} else {
if (this.eat(types.colon)) {
this.unexpected(null, "ES2015 named imports do not destructure. " + "Use another statement for destructuring after the import.");
}
this.expect(types.comma);
if (this.eat(types.braceR)) break;
}
this.parseImportSpecifier(node);
}
}
parseImportSpecifier(node) {
const specifier = this.startNode();
specifier.imported = this.parseIdentifier(true);
if (this.eatContextual("as")) {
specifier.local = this.parseIdentifier();
} else {
this.checkReservedWord(specifier.imported.name, specifier.start, true, true);
specifier.local = specifier.imported.__clone();
}
this.checkLVal(specifier.local, BIND_LEXICAL, undefined, "import specifier");
node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"));
}
}
class Parser extends StatementParser {
constructor(options, input) {
options = getOptions(options);
super(options, input);
const ScopeHandler = this.getScopeHandler();
this.options = options;
this.inModule = this.options.sourceType === "module";
this.scope = new ScopeHandler(this.raise.bind(this), this.inModule);
this.plugins = pluginsMap(this.options.plugins);
this.filename = options.sourceFilename;
}
getScopeHandler() {
return ScopeHandler;
}
parse() {
this.scope.enter(SCOPE_PROGRAM);
const file = this.startNode();
const program = this.startNode();
this.nextToken();
return this.parseTopLevel(file, program);
}
}
function pluginsMap(plugins) {
const pluginMap = new Map();
for (let _i = 0; _i < plugins.length; _i++) {
const plugin = plugins[_i];
const [name, options] = Array.isArray(plugin) ? plugin : [plugin, {}];
if (!pluginMap.has(name)) pluginMap.set(name, options || {});
}
return pluginMap;
}
function parse(input, options) {
if (options && options.sourceType === "unambiguous") {
options = Object.assign({}, options);
try {
options.sourceType = "module";
const parser = getParser(options, input);
const ast = parser.parse();
if (!parser.sawUnambiguousESM) ast.program.sourceType = "script";
return ast;
} catch (moduleError) {
try {
options.sourceType = "script";
return getParser(options, input).parse();
} catch (scriptError) {}
throw moduleError;
}
} else {
return getParser(options, input).parse();
}
}
function parseExpression(input, options) {
const parser = getParser(options, input);
if (parser.options.strictMode) {
parser.state.strict = true;
}
return parser.getExpression();
}
function getParser(options, input) {
let cls = Parser;
if (options && options.plugins) {
validatePlugins(options.plugins);
cls = getParserClass(options.plugins);
}
return new cls(options, input);
}
const parserClassCache = {};
function getParserClass(pluginsFromOptions) {
const pluginList = mixinPluginNames.filter(name => hasPlugin(pluginsFromOptions, name));
const key = pluginList.join("/");
let cls = parserClassCache[key];
if (!cls) {
cls = Parser;
for (let _i = 0; _i < pluginList.length; _i++) {
const plugin = pluginList[_i];
cls = mixinPlugins[plugin](cls);
}
parserClassCache[key] = cls;
}
return cls;
}
exports.parse = parse;
exports.parseExpression = parseExpression;
exports.tokTypes = types;
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