@babel/parser
Version:
A JavaScript parser
1,389 lines (1,387 loc) • 72.2 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = exports.ParseStatementFlag = exports.ParseFunctionFlag = void 0;
var _types = require("../tokenizer/types");
var _expression = require("./expression");
var _parseError = require("../parse-error");
var _identifier = require("../util/identifier");
var _scopeflags = require("../util/scopeflags");
var _util = require("./util");
var _productionParameter = require("../util/production-parameter");
var _expressionScope = require("../util/expression-scope");
var _tokenizer = require("../tokenizer");
var _location = require("../util/location");
var _node = require("./node");
var _lval = require("./lval");
const loopLabel = {
kind: "loop"
},
switchLabel = {
kind: "switch"
};
var ParseFunctionFlag = {
Expression: 0,
Declaration: 1,
HangingDeclaration: 2,
NullableId: 4,
Async: 8
};
exports.ParseFunctionFlag = ParseFunctionFlag;
var ParseStatementFlag = {
StatementOnly: 0,
AllowImportExport: 1,
AllowDeclaration: 2,
AllowFunctionDeclaration: 4,
AllowLabeledFunction: 8
};
exports.ParseStatementFlag = ParseStatementFlag;
const loneSurrogate = /[\uD800-\uDFFF]/u;
const keywordRelationalOperator = /in(?:stanceof)?/y;
function babel7CompatTokens(tokens, input) {
for (let i = 0; i < tokens.length; i++) {
const token = tokens[i];
const {
type
} = token;
if (typeof type === "number") {
{
if (type === 136) {
const {
loc,
start,
value,
end
} = token;
const hashEndPos = start + 1;
const hashEndLoc = (0, _location.createPositionWithColumnOffset)(loc.start, 1);
tokens.splice(i, 1, new _tokenizer.Token({
type: (0, _types.getExportedToken)(27),
value: "#",
start: start,
end: hashEndPos,
startLoc: loc.start,
endLoc: hashEndLoc
}), new _tokenizer.Token({
type: (0, _types.getExportedToken)(130),
value: value,
start: hashEndPos,
end: end,
startLoc: hashEndLoc,
endLoc: loc.end
}));
i++;
continue;
}
if ((0, _types.tokenIsTemplate)(type)) {
const {
loc,
start,
value,
end
} = token;
const backquoteEnd = start + 1;
const backquoteEndLoc = (0, _location.createPositionWithColumnOffset)(loc.start, 1);
let startToken;
if (input.charCodeAt(start) === 96) {
startToken = new _tokenizer.Token({
type: (0, _types.getExportedToken)(22),
value: "`",
start: start,
end: backquoteEnd,
startLoc: loc.start,
endLoc: backquoteEndLoc
});
} else {
startToken = new _tokenizer.Token({
type: (0, _types.getExportedToken)(8),
value: "}",
start: start,
end: backquoteEnd,
startLoc: loc.start,
endLoc: backquoteEndLoc
});
}
let templateValue, templateElementEnd, templateElementEndLoc, endToken;
if (type === 24) {
templateElementEnd = end - 1;
templateElementEndLoc = (0, _location.createPositionWithColumnOffset)(loc.end, -1);
templateValue = value === null ? null : value.slice(1, -1);
endToken = new _tokenizer.Token({
type: (0, _types.getExportedToken)(22),
value: "`",
start: templateElementEnd,
end: end,
startLoc: templateElementEndLoc,
endLoc: loc.end
});
} else {
templateElementEnd = end - 2;
templateElementEndLoc = (0, _location.createPositionWithColumnOffset)(loc.end, -2);
templateValue = value === null ? null : value.slice(1, -2);
endToken = new _tokenizer.Token({
type: (0, _types.getExportedToken)(23),
value: "${",
start: templateElementEnd,
end: end,
startLoc: templateElementEndLoc,
endLoc: loc.end
});
}
tokens.splice(i, 1, startToken, new _tokenizer.Token({
type: (0, _types.getExportedToken)(20),
value: templateValue,
start: backquoteEnd,
end: templateElementEnd,
startLoc: backquoteEndLoc,
endLoc: templateElementEndLoc
}), endToken);
i += 2;
continue;
}
}
token.type = (0, _types.getExportedToken)(type);
}
}
return tokens;
}
class StatementParser extends _expression.default {
parseTopLevel(file, program) {
file.program = this.parseProgram(program);
file.comments = this.state.comments;
if (this.options.tokens) {
file.tokens = babel7CompatTokens(this.tokens, this.input);
}
return this.finishNode(file, "File");
}
parseProgram(program, end = 137, sourceType = this.options.sourceType) {
program.sourceType = sourceType;
program.interpreter = this.parseInterpreterDirective();
this.parseBlockBody(program, true, true, end);
if (this.inModule && !this.options.allowUndeclaredExports && this.scope.undefinedExports.size > 0) {
for (const [localName, at] of Array.from(this.scope.undefinedExports)) {
this.raise(_parseError.Errors.ModuleExportUndefined, {
at,
localName
});
}
}
let finishedProgram;
if (end === 137) {
finishedProgram = this.finishNode(program, "Program");
} else {
finishedProgram = this.finishNodeAt(program, "Program", (0, _location.createPositionWithColumnOffset)(this.state.startLoc, -1));
}
return finishedProgram;
}
stmtToDirective(stmt) {
const directive = stmt;
directive.type = "Directive";
directive.value = directive.expression;
delete directive.expression;
const directiveLiteral = directive.value;
const expressionValue = directiveLiteral.value;
const raw = this.input.slice(directiveLiteral.start, directiveLiteral.end);
const val = directiveLiteral.value = raw.slice(1, -1);
this.addExtra(directiveLiteral, "raw", raw);
this.addExtra(directiveLiteral, "rawValue", val);
this.addExtra(directiveLiteral, "expressionValue", expressionValue);
directiveLiteral.type = "DirectiveLiteral";
return directive;
}
parseInterpreterDirective() {
if (!this.match(28)) {
return null;
}
const node = this.startNode();
node.value = this.state.value;
this.next();
return this.finishNode(node, "InterpreterDirective");
}
isLet() {
if (!this.isContextual(99)) {
return false;
}
return this.hasFollowingBindingAtom();
}
chStartsBindingIdentifier(ch, pos) {
if ((0, _identifier.isIdentifierStart)(ch)) {
keywordRelationalOperator.lastIndex = pos;
if (keywordRelationalOperator.test(this.input)) {
const endCh = this.codePointAtPos(keywordRelationalOperator.lastIndex);
if (!(0, _identifier.isIdentifierChar)(endCh) && endCh !== 92) {
return false;
}
}
return true;
} else if (ch === 92) {
return true;
} else {
return false;
}
}
chStartsBindingPattern(ch) {
return ch === 91 || ch === 123;
}
hasFollowingBindingAtom() {
const next = this.nextTokenStart();
const nextCh = this.codePointAtPos(next);
return this.chStartsBindingPattern(nextCh) || this.chStartsBindingIdentifier(nextCh, next);
}
hasInLineFollowingBindingIdentifier() {
const next = this.nextTokenInLineStart();
const nextCh = this.codePointAtPos(next);
return this.chStartsBindingIdentifier(nextCh, next);
}
startsUsingForOf() {
const {
type,
containsEsc
} = this.lookahead();
if (type === 101 && !containsEsc) {
return false;
} else if ((0, _types.tokenIsIdentifier)(type) && !this.hasFollowingLineBreak()) {
this.expectPlugin("explicitResourceManagement");
return true;
}
}
startsAwaitUsing() {
let next = this.nextTokenInLineStart();
if (this.isUnparsedContextual(next, "using")) {
next = this.nextTokenInLineStartSince(next + 5);
const nextCh = this.codePointAtPos(next);
if (this.chStartsBindingIdentifier(nextCh, next)) {
this.expectPlugin("explicitResourceManagement");
return true;
}
}
return false;
}
parseModuleItem() {
return this.parseStatementLike(ParseStatementFlag.AllowImportExport | ParseStatementFlag.AllowDeclaration | ParseStatementFlag.AllowFunctionDeclaration | ParseStatementFlag.AllowLabeledFunction);
}
parseStatementListItem() {
return this.parseStatementLike(ParseStatementFlag.AllowDeclaration | ParseStatementFlag.AllowFunctionDeclaration | (!this.options.annexB || this.state.strict ? 0 : ParseStatementFlag.AllowLabeledFunction));
}
parseStatementOrSloppyAnnexBFunctionDeclaration(allowLabeledFunction = false) {
let flags = ParseStatementFlag.StatementOnly;
if (this.options.annexB && !this.state.strict) {
flags |= ParseStatementFlag.AllowFunctionDeclaration;
if (allowLabeledFunction) {
flags |= ParseStatementFlag.AllowLabeledFunction;
}
}
return this.parseStatementLike(flags);
}
parseStatement() {
return this.parseStatementLike(ParseStatementFlag.StatementOnly);
}
parseStatementLike(flags) {
let decorators = null;
if (this.match(26)) {
decorators = this.parseDecorators(true);
}
return this.parseStatementContent(flags, decorators);
}
parseStatementContent(flags, decorators) {
const starttype = this.state.type;
const node = this.startNode();
const allowDeclaration = !!(flags & ParseStatementFlag.AllowDeclaration);
const allowFunctionDeclaration = !!(flags & ParseStatementFlag.AllowFunctionDeclaration);
const topLevel = flags & ParseStatementFlag.AllowImportExport;
switch (starttype) {
case 60:
return this.parseBreakContinueStatement(node, true);
case 63:
return this.parseBreakContinueStatement(node, false);
case 64:
return this.parseDebuggerStatement(node);
case 90:
return this.parseDoWhileStatement(node);
case 91:
return this.parseForStatement(node);
case 68:
if (this.lookaheadCharCode() === 46) break;
if (!allowFunctionDeclaration) {
this.raise(this.state.strict ? _parseError.Errors.StrictFunction : this.options.annexB ? _parseError.Errors.SloppyFunctionAnnexB : _parseError.Errors.SloppyFunction, {
at: this.state.startLoc
});
}
return this.parseFunctionStatement(node, false, !allowDeclaration && allowFunctionDeclaration);
case 80:
if (!allowDeclaration) this.unexpected();
return this.parseClass(this.maybeTakeDecorators(decorators, node), true);
case 69:
return this.parseIfStatement(node);
case 70:
return this.parseReturnStatement(node);
case 71:
return this.parseSwitchStatement(node);
case 72:
return this.parseThrowStatement(node);
case 73:
return this.parseTryStatement(node);
case 96:
if (!this.state.containsEsc && this.startsAwaitUsing()) {
if (!this.isAwaitAllowed()) {
this.raise(_parseError.Errors.AwaitUsingNotInAsyncContext, {
at: node
});
} else if (!allowDeclaration) {
this.raise(_parseError.Errors.UnexpectedLexicalDeclaration, {
at: node
});
}
this.next();
return this.parseVarStatement(node, "await using");
}
break;
case 105:
if (this.state.containsEsc || !this.hasInLineFollowingBindingIdentifier()) {
break;
}
this.expectPlugin("explicitResourceManagement");
if (!this.scope.inModule && this.scope.inTopLevel) {
this.raise(_parseError.Errors.UnexpectedUsingDeclaration, {
at: this.state.startLoc
});
} else if (!allowDeclaration) {
this.raise(_parseError.Errors.UnexpectedLexicalDeclaration, {
at: this.state.startLoc
});
}
return this.parseVarStatement(node, "using");
case 99:
{
if (this.state.containsEsc) {
break;
}
const next = this.nextTokenStart();
const nextCh = this.codePointAtPos(next);
if (nextCh !== 91) {
if (!allowDeclaration && this.hasFollowingLineBreak()) break;
if (!this.chStartsBindingIdentifier(nextCh, next) && nextCh !== 123) {
break;
}
}
}
case 75:
{
if (!allowDeclaration) {
this.raise(_parseError.Errors.UnexpectedLexicalDeclaration, {
at: this.state.startLoc
});
}
}
case 74:
{
const kind = this.state.value;
return this.parseVarStatement(node, kind);
}
case 92:
return this.parseWhileStatement(node);
case 76:
return this.parseWithStatement(node);
case 5:
return this.parseBlock();
case 13:
return this.parseEmptyStatement(node);
case 83:
{
const nextTokenCharCode = this.lookaheadCharCode();
if (nextTokenCharCode === 40 || nextTokenCharCode === 46) {
break;
}
}
case 82:
{
if (!this.options.allowImportExportEverywhere && !topLevel) {
this.raise(_parseError.Errors.UnexpectedImportExport, {
at: this.state.startLoc
});
}
this.next();
let result;
if (starttype === 83) {
result = this.parseImport(node);
if (result.type === "ImportDeclaration" && (!result.importKind || result.importKind === "value")) {
this.sawUnambiguousESM = true;
}
} else {
result = this.parseExport(node, decorators);
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(result);
return result;
}
default:
{
if (this.isAsyncFunction()) {
if (!allowDeclaration) {
this.raise(_parseError.Errors.AsyncFunctionInSingleStatementContext, {
at: this.state.startLoc
});
}
this.next();
return this.parseFunctionStatement(node, true, !allowDeclaration && allowFunctionDeclaration);
}
}
}
const maybeName = this.state.value;
const expr = this.parseExpression();
if ((0, _types.tokenIsIdentifier)(starttype) && expr.type === "Identifier" && this.eat(14)) {
return this.parseLabeledStatement(node, maybeName, expr, flags);
} else {
return this.parseExpressionStatement(node, expr, decorators);
}
}
assertModuleNodeAllowed(node) {
if (!this.options.allowImportExportEverywhere && !this.inModule) {
this.raise(_parseError.Errors.ImportOutsideModule, {
at: node
});
}
}
decoratorsEnabledBeforeExport() {
if (this.hasPlugin("decorators-legacy")) return true;
return this.hasPlugin("decorators") && this.getPluginOption("decorators", "decoratorsBeforeExport") !== false;
}
maybeTakeDecorators(maybeDecorators, classNode, exportNode) {
if (maybeDecorators) {
if (classNode.decorators && classNode.decorators.length > 0) {
if (typeof this.getPluginOption("decorators", "decoratorsBeforeExport") !== "boolean") {
this.raise(_parseError.Errors.DecoratorsBeforeAfterExport, {
at: classNode.decorators[0]
});
}
classNode.decorators.unshift(...maybeDecorators);
} else {
classNode.decorators = maybeDecorators;
}
this.resetStartLocationFromNode(classNode, maybeDecorators[0]);
if (exportNode) this.resetStartLocationFromNode(exportNode, classNode);
}
return classNode;
}
canHaveLeadingDecorator() {
return this.match(80);
}
parseDecorators(allowExport) {
const decorators = [];
do {
decorators.push(this.parseDecorator());
} while (this.match(26));
if (this.match(82)) {
if (!allowExport) {
this.unexpected();
}
if (!this.decoratorsEnabledBeforeExport()) {
this.raise(_parseError.Errors.DecoratorExportClass, {
at: this.state.startLoc
});
}
} else if (!this.canHaveLeadingDecorator()) {
throw this.raise(_parseError.Errors.UnexpectedLeadingDecorator, {
at: this.state.startLoc
});
}
return decorators;
}
parseDecorator() {
this.expectOnePlugin(["decorators", "decorators-legacy"]);
const node = this.startNode();
this.next();
if (this.hasPlugin("decorators")) {
const startLoc = this.state.startLoc;
let expr;
if (this.match(10)) {
const startLoc = this.state.startLoc;
this.next();
expr = this.parseExpression();
this.expect(11);
expr = this.wrapParenthesis(startLoc, expr);
const paramsStartLoc = this.state.startLoc;
node.expression = this.parseMaybeDecoratorArguments(expr);
if (this.getPluginOption("decorators", "allowCallParenthesized") === false && node.expression !== expr) {
this.raise(_parseError.Errors.DecoratorArgumentsOutsideParentheses, {
at: paramsStartLoc
});
}
} else {
expr = this.parseIdentifier(false);
while (this.eat(16)) {
const node = this.startNodeAt(startLoc);
node.object = expr;
if (this.match(136)) {
this.classScope.usePrivateName(this.state.value, this.state.startLoc);
node.property = this.parsePrivateName();
} else {
node.property = this.parseIdentifier(true);
}
node.computed = false;
expr = this.finishNode(node, "MemberExpression");
}
node.expression = this.parseMaybeDecoratorArguments(expr);
}
} else {
node.expression = this.parseExprSubscripts();
}
return this.finishNode(node, "Decorator");
}
parseMaybeDecoratorArguments(expr) {
if (this.eat(10)) {
const node = this.startNodeAtNode(expr);
node.callee = expr;
node.arguments = this.parseCallExpressionArguments(11, false);
this.toReferencedList(node.arguments);
return this.finishNode(node, "CallExpression");
}
return expr;
}
parseBreakContinueStatement(node, isBreak) {
this.next();
if (this.isLineTerminator()) {
node.label = null;
} else {
node.label = this.parseIdentifier();
this.semicolon();
}
this.verifyBreakContinue(node, isBreak);
return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
}
verifyBreakContinue(node, isBreak) {
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) {
const type = isBreak ? "BreakStatement" : "ContinueStatement";
this.raise(_parseError.Errors.IllegalBreakContinue, {
at: node,
type
});
}
}
parseDebuggerStatement(node) {
this.next();
this.semicolon();
return this.finishNode(node, "DebuggerStatement");
}
parseHeaderExpression() {
this.expect(10);
const val = this.parseExpression();
this.expect(11);
return val;
}
parseDoWhileStatement(node) {
this.next();
this.state.labels.push(loopLabel);
node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement());
this.state.labels.pop();
this.expect(92);
node.test = this.parseHeaderExpression();
this.eat(13);
return this.finishNode(node, "DoWhileStatement");
}
parseForStatement(node) {
this.next();
this.state.labels.push(loopLabel);
let awaitAt = null;
if (this.isAwaitAllowed() && this.eatContextual(96)) {
awaitAt = this.state.lastTokStartLoc;
}
this.scope.enter(_scopeflags.SCOPE_OTHER);
this.expect(10);
if (this.match(13)) {
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, null);
}
const startsWithLet = this.isContextual(99);
{
const startsWithAwaitUsing = this.isContextual(96) && this.startsAwaitUsing();
const starsWithUsingDeclaration = startsWithAwaitUsing || this.isContextual(105) && this.startsUsingForOf();
const isLetOrUsing = startsWithLet && this.hasFollowingBindingAtom() || starsWithUsingDeclaration;
if (this.match(74) || this.match(75) || isLetOrUsing) {
const initNode = this.startNode();
let kind;
if (startsWithAwaitUsing) {
kind = "await using";
if (!this.isAwaitAllowed()) {
this.raise(_parseError.Errors.AwaitUsingNotInAsyncContext, {
at: this.state.startLoc
});
}
this.next();
} else {
kind = this.state.value;
}
this.next();
this.parseVar(initNode, true, kind);
const init = this.finishNode(initNode, "VariableDeclaration");
const isForIn = this.match(58);
if (isForIn && starsWithUsingDeclaration) {
this.raise(_parseError.Errors.ForInUsing, {
at: init
});
}
if ((isForIn || this.isContextual(101)) && init.declarations.length === 1) {
return this.parseForIn(node, init, awaitAt);
}
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
}
const startsWithAsync = this.isContextual(95);
const refExpressionErrors = new _util.ExpressionErrors();
const init = this.parseExpression(true, refExpressionErrors);
const isForOf = this.isContextual(101);
if (isForOf) {
if (startsWithLet) {
this.raise(_parseError.Errors.ForOfLet, {
at: init
});
}
if (awaitAt === null && startsWithAsync && init.type === "Identifier") {
this.raise(_parseError.Errors.ForOfAsync, {
at: init
});
}
}
if (isForOf || this.match(58)) {
this.checkDestructuringPrivate(refExpressionErrors);
this.toAssignable(init, true);
const type = isForOf ? "ForOfStatement" : "ForInStatement";
this.checkLVal(init, {
in: {
type
}
});
return this.parseForIn(node, init, awaitAt);
} else {
this.checkExpressionErrors(refExpressionErrors, true);
}
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
parseFunctionStatement(node, isAsync, isHangingDeclaration) {
this.next();
return this.parseFunction(node, ParseFunctionFlag.Declaration | (isHangingDeclaration ? ParseFunctionFlag.HangingDeclaration : 0) | (isAsync ? ParseFunctionFlag.Async : 0));
}
parseIfStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
node.consequent = this.parseStatementOrSloppyAnnexBFunctionDeclaration();
node.alternate = this.eat(66) ? this.parseStatementOrSloppyAnnexBFunctionDeclaration() : null;
return this.finishNode(node, "IfStatement");
}
parseReturnStatement(node) {
if (!this.prodParam.hasReturn && !this.options.allowReturnOutsideFunction) {
this.raise(_parseError.Errors.IllegalReturn, {
at: this.state.startLoc
});
}
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(5);
this.state.labels.push(switchLabel);
this.scope.enter(_scopeflags.SCOPE_OTHER);
let cur;
for (let sawDefault; !this.match(8);) {
if (this.match(61) || this.match(65)) {
const isCase = this.match(61);
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(_parseError.Errors.MultipleDefaultsInSwitch, {
at: this.state.lastTokStartLoc
});
}
sawDefault = true;
cur.test = null;
}
this.expect(14);
} else {
if (cur) {
cur.consequent.push(this.parseStatementListItem());
} 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 (this.hasPrecedingLineBreak()) {
this.raise(_parseError.Errors.NewlineAfterThrow, {
at: this.state.lastTokEndLoc
});
}
node.argument = this.parseExpression();
this.semicolon();
return this.finishNode(node, "ThrowStatement");
}
parseCatchClauseParam() {
const param = this.parseBindingAtom();
this.scope.enter(this.options.annexB && param.type === "Identifier" ? _scopeflags.SCOPE_SIMPLE_CATCH : 0);
this.checkLVal(param, {
in: {
type: "CatchClause"
},
binding: _scopeflags.BIND_CATCH_PARAM
});
return param;
}
parseTryStatement(node) {
this.next();
node.block = this.parseBlock();
node.handler = null;
if (this.match(62)) {
const clause = this.startNode();
this.next();
if (this.match(10)) {
this.expect(10);
clause.param = this.parseCatchClauseParam();
this.expect(11);
} else {
clause.param = null;
this.scope.enter(_scopeflags.SCOPE_OTHER);
}
clause.body = this.withSmartMixTopicForbiddingContext(() => this.parseBlock(false, false));
this.scope.exit();
node.handler = this.finishNode(clause, "CatchClause");
}
node.finalizer = this.eat(67) ? this.parseBlock() : null;
if (!node.handler && !node.finalizer) {
this.raise(_parseError.Errors.NoCatchOrFinally, {
at: node
});
}
return this.finishNode(node, "TryStatement");
}
parseVarStatement(node, kind, allowMissingInitializer = false) {
this.next();
this.parseVar(node, false, kind, allowMissingInitializer);
this.semicolon();
return this.finishNode(node, "VariableDeclaration");
}
parseWhileStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
this.state.labels.push(loopLabel);
node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement());
this.state.labels.pop();
return this.finishNode(node, "WhileStatement");
}
parseWithStatement(node) {
if (this.state.strict) {
this.raise(_parseError.Errors.StrictWith, {
at: this.state.startLoc
});
}
this.next();
node.object = this.parseHeaderExpression();
node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement());
return this.finishNode(node, "WithStatement");
}
parseEmptyStatement(node) {
this.next();
return this.finishNode(node, "EmptyStatement");
}
parseLabeledStatement(node, maybeName, expr, flags) {
for (const label of this.state.labels) {
if (label.name === maybeName) {
this.raise(_parseError.Errors.LabelRedeclaration, {
at: expr,
labelName: maybeName
});
}
}
const kind = (0, _types.tokenIsLoop)(this.state.type) ? "loop" : this.match(71) ? "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 = flags & ParseStatementFlag.AllowLabeledFunction ? this.parseStatementOrSloppyAnnexBFunctionDeclaration(true) : this.parseStatement();
this.state.labels.pop();
node.label = expr;
return this.finishNode(node, "LabeledStatement");
}
parseExpressionStatement(node, expr, decorators) {
node.expression = expr;
this.semicolon();
return this.finishNode(node, "ExpressionStatement");
}
parseBlock(allowDirectives = false, createNewLexicalScope = true, afterBlockParse) {
const node = this.startNode();
if (allowDirectives) {
this.state.strictErrors.clear();
}
this.expect(5);
if (createNewLexicalScope) {
this.scope.enter(_scopeflags.SCOPE_OTHER);
}
this.parseBlockBody(node, allowDirectives, false, 8, afterBlockParse);
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, afterBlockParse) {
const body = node.body = [];
const directives = node.directives = [];
this.parseBlockOrModuleBlockBody(body, allowDirectives ? directives : undefined, topLevel, end, afterBlockParse);
}
parseBlockOrModuleBlockBody(body, directives, topLevel, end, afterBlockParse) {
const oldStrict = this.state.strict;
let hasStrictModeDirective = false;
let parsedNonDirective = false;
while (!this.match(end)) {
const stmt = topLevel ? this.parseModuleItem() : this.parseStatementListItem();
if (directives && !parsedNonDirective) {
if (this.isValidDirective(stmt)) {
const directive = this.stmtToDirective(stmt);
directives.push(directive);
if (!hasStrictModeDirective && directive.value.value === "use strict") {
hasStrictModeDirective = true;
this.setStrict(true);
}
continue;
}
parsedNonDirective = true;
this.state.strictErrors.clear();
}
body.push(stmt);
}
if (afterBlockParse) {
afterBlockParse.call(this, hasStrictModeDirective);
}
if (!oldStrict) {
this.setStrict(false);
}
this.next();
}
parseFor(node, init) {
node.init = init;
this.semicolon(false);
node.test = this.match(13) ? null : this.parseExpression();
this.semicolon(false);
node.update = this.match(11) ? null : this.parseExpression();
this.expect(11);
node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement());
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, "ForStatement");
}
parseForIn(node, init, awaitAt) {
const isForIn = this.match(58);
this.next();
if (isForIn) {
if (awaitAt !== null) this.unexpected(awaitAt);
} else {
node.await = awaitAt !== null;
}
if (init.type === "VariableDeclaration" && init.declarations[0].init != null && (!isForIn || !this.options.annexB || this.state.strict || init.kind !== "var" || init.declarations[0].id.type !== "Identifier")) {
this.raise(_parseError.Errors.ForInOfLoopInitializer, {
at: init,
type: isForIn ? "ForInStatement" : "ForOfStatement"
});
}
if (init.type === "AssignmentPattern") {
this.raise(_parseError.Errors.InvalidLhs, {
at: init,
ancestor: {
type: "ForStatement"
}
});
}
node.left = init;
node.right = isForIn ? this.parseExpression() : this.parseMaybeAssignAllowIn();
this.expect(11);
node.body = this.withSmartMixTopicForbiddingContext(() => this.parseStatement());
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement");
}
parseVar(node, isFor, kind, allowMissingInitializer = false) {
const declarations = node.declarations = [];
node.kind = kind;
for (;;) {
const decl = this.startNode();
this.parseVarId(decl, kind);
decl.init = !this.eat(29) ? null : isFor ? this.parseMaybeAssignDisallowIn() : this.parseMaybeAssignAllowIn();
if (decl.init === null && !allowMissingInitializer) {
if (decl.id.type !== "Identifier" && !(isFor && (this.match(58) || this.isContextual(101)))) {
this.raise(_parseError.Errors.DeclarationMissingInitializer, {
at: this.state.lastTokEndLoc,
kind: "destructuring"
});
} else if (kind === "const" && !(this.match(58) || this.isContextual(101))) {
this.raise(_parseError.Errors.DeclarationMissingInitializer, {
at: this.state.lastTokEndLoc,
kind: "const"
});
}
}
declarations.push(this.finishNode(decl, "VariableDeclarator"));
if (!this.eat(12)) break;
}
return node;
}
parseVarId(decl, kind) {
const id = this.parseBindingAtom();
this.checkLVal(id, {
in: {
type: "VariableDeclarator"
},
binding: kind === "var" ? _scopeflags.BIND_VAR : _scopeflags.BIND_LEXICAL
});
decl.id = id;
}
parseAsyncFunctionExpression(node) {
return this.parseFunction(node, ParseFunctionFlag.Async);
}
parseFunction(node, flags = ParseFunctionFlag.Expression) {
const hangingDeclaration = flags & ParseFunctionFlag.HangingDeclaration;
const isDeclaration = !!(flags & ParseFunctionFlag.Declaration);
const requireId = isDeclaration && !(flags & ParseFunctionFlag.NullableId);
const isAsync = !!(flags & ParseFunctionFlag.Async);
this.initFunction(node, isAsync);
if (this.match(55)) {
if (hangingDeclaration) {
this.raise(_parseError.Errors.GeneratorInSingleStatementContext, {
at: this.state.startLoc
});
}
this.next();
node.generator = true;
}
if (isDeclaration) {
node.id = this.parseFunctionId(requireId);
}
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
this.state.maybeInArrowParameters = false;
this.scope.enter(_scopeflags.SCOPE_FUNCTION);
this.prodParam.enter((0, _productionParameter.functionFlags)(isAsync, node.generator));
if (!isDeclaration) {
node.id = this.parseFunctionId();
}
this.parseFunctionParams(node, false);
this.withSmartMixTopicForbiddingContext(() => {
this.parseFunctionBodyAndFinish(node, isDeclaration ? "FunctionDeclaration" : "FunctionExpression");
});
this.prodParam.exit();
this.scope.exit();
if (isDeclaration && !hangingDeclaration) {
this.registerFunctionStatementId(node);
}
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return node;
}
parseFunctionId(requireId) {
return requireId || (0, _types.tokenIsIdentifier)(this.state.type) ? this.parseIdentifier() : null;
}
parseFunctionParams(node, isConstructor) {
this.expect(10);
this.expressionScope.enter((0, _expressionScope.newParameterDeclarationScope)());
node.params = this.parseBindingList(11, 41, _lval.ParseBindingListFlags.IS_FUNCTION_PARAMS | (isConstructor ? _lval.ParseBindingListFlags.IS_CONSTRUCTOR_PARAMS : 0));
this.expressionScope.exit();
}
registerFunctionStatementId(node) {
if (!node.id) return;
this.scope.declareName(node.id.name, !this.options.annexB || this.state.strict || node.generator || node.async ? this.scope.treatFunctionsAsVar ? _scopeflags.BIND_VAR : _scopeflags.BIND_LEXICAL : _scopeflags.BIND_FUNCTION, node.id.loc.start);
}
parseClass(node, isStatement, optionalId) {
this.next();
const oldStrict = this.state.strict;
this.state.strict = true;
this.parseClassId(node, isStatement, optionalId);
this.parseClassSuper(node);
node.body = this.parseClassBody(!!node.superClass, oldStrict);
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
}
isClassProperty() {
return this.match(29) || this.match(13) || this.match(8);
}
isClassMethod() {
return this.match(10);
}
isNonstaticConstructor(method) {
return !method.computed && !method.static && (method.key.name === "constructor" || method.key.value === "constructor");
}
parseClassBody(hadSuperClass, oldStrict) {
this.classScope.enter();
const state = {
hadConstructor: false,
hadSuperClass
};
let decorators = [];
const classBody = this.startNode();
classBody.body = [];
this.expect(5);
this.withSmartMixTopicForbiddingContext(() => {
while (!this.match(8)) {
if (this.eat(13)) {
if (decorators.length > 0) {
throw this.raise(_parseError.Errors.DecoratorSemicolon, {
at: this.state.lastTokEndLoc
});
}
continue;
}
if (this.match(26)) {
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);
if (member.kind === "constructor" && member.decorators && member.decorators.length > 0) {
this.raise(_parseError.Errors.DecoratorConstructor, {
at: member
});
}
}
});
this.state.strict = oldStrict;
this.next();
if (decorators.length) {
throw this.raise(_parseError.Errors.TrailingDecorator, {
at: this.state.startLoc
});
}
this.classScope.exit();
return this.finishNode(classBody, "ClassBody");
}
parseClassMemberFromModifier(classBody, member) {
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 true;
} else if (this.isClassProperty()) {
const prop = member;
prop.computed = false;
prop.key = key;
prop.static = false;
classBody.body.push(this.parseClassProperty(prop));
return true;
}
this.resetPreviousNodeTrailingComments(key);
return false;
}
parseClassMember(classBody, member, state) {
const isStatic = this.isContextual(104);
if (isStatic) {
if (this.parseClassMemberFromModifier(classBody, member)) {
return;
}
if (this.eat(5)) {
this.parseClassStaticBlock(classBody, member);
return;
}
}
this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
}
parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
const publicMethod = member;
const privateMethod = member;
const publicProp = member;
const privateProp = member;
const accessorProp = member;
const method = publicMethod;
const publicMember = publicMethod;
member.static = isStatic;
this.parsePropertyNamePrefixOperator(member);
if (this.eat(55)) {
method.kind = "method";
const isPrivateName = this.match(136);
this.parseClassElementName(method);
if (isPrivateName) {
this.pushClassPrivateMethod(classBody, privateMethod, true, false);
return;
}
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(_parseError.Errors.ConstructorIsGenerator, {
at: publicMethod.key
});
}
this.pushClassMethod(classBody, publicMethod, true, false, false, false);
return;
}
const isContextual = (0, _types.tokenIsIdentifier)(this.state.type) && !this.state.containsEsc;
const isPrivate = this.match(136);
const key = this.parseClassElementName(member);
const maybeQuestionTokenStartLoc = this.state.startLoc;
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 (state.hadConstructor && !this.hasPlugin("typescript")) {
this.raise(_parseError.Errors.DuplicateConstructor, {
at: key
});
}
if (isConstructor && this.hasPlugin("typescript") && member.override) {
this.raise(_parseError.Errors.OverrideOnConstructor, {
at: key
});
}
state.hadConstructor = true;
allowsDirectSuper = state.hadSuperClass;
}
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 (isContextual && key.name === "async" && !this.isLineTerminator()) {
this.resetPreviousNodeTrailingComments(key);
const isGenerator = this.eat(55);
if (publicMember.optional) {
this.unexpected(maybeQuestionTokenStartLoc);
}
method.kind = "method";
const isPrivate = this.match(136);
this.parseClassElementName(method);
this.parsePostMemberNameModifiers(publicMember);
if (isPrivate) {
this.pushClassPrivateMethod(classBody, privateMethod, isGenerator, true);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(_parseError.Errors.ConstructorIsAsync, {
at: publicMethod.key
});
}
this.pushClassMethod(classBody, publicMethod, isGenerator, true, false, false);
}
} else if (isContextual && (key.name === "get" || key.name === "set") && !(this.match(55) && this.isLineTerminator())) {
this.resetPreviousNodeTrailingComments(key);
method.kind = key.name;
const isPrivate = this.match(136);
this.parseClassElementName(publicMethod);
if (isPrivate) {
this.pushClassPrivateMethod(classBody, privateMethod, false, false);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(_parseError.Errors.ConstructorIsAccessor, {
at: publicMethod.key
});
}
this.pushClassMethod(classBody, publicMethod, false, false, false, false);
}
this.checkGetterSetterParams(publicMethod);
} else if (isContextual && key.name === "accessor" && !this.isLineTerminator()) {
this.expectPlugin("decoratorAutoAccessors");
this.resetPreviousNodeTrailingComments(key);
const isPrivate = this.match(136);
this.parseClassElementName(publicProp);
this.pushClassAccessorProperty(classBody, accessorProp, isPrivate);
} else if (this.isLineTerminator()) {
if (isPrivate) {
this.pushClassPrivateProperty(classBody, privateProp);
} else {
this.pushClassProperty(classBody, publicProp);
}
} else {
this.unexpected();
}
}
parseClassElementName(member) {
const {
type,
value
} = this.state;
if ((type === 130 || type === 131) && member.static && value === "prototype") {
this.raise(_parseError.Errors.StaticPrototype, {
at: this.state.startLoc
});
}
if (type === 136) {
if (value === "constructor") {
this.raise(_parseError.Errors.ConstructorClassPrivateField, {
at: this.state.startLoc
});
}
const key = this.parsePrivateName();
member.key = key;
return key;
}
return this.parsePropertyName(member);
}
parseClassStaticBlock(classBody, member) {
var _member$decorators;
this.scope.enter(_scopeflags.SCOPE_CLASS | _scopeflags.SCOPE_STATIC_BLOCK | _scopeflags.SCOPE_SUPER);
const oldLabels = this.state.labels;
this.state.labels = [];
this.prodParam.enter(_productionParameter.PARAM);
const body = member.body = [];
this.parseBlockOrModuleBlockBody(body, undefined, false, 8);
this.prodParam.exit();
this.scope.exit();
this.state.labels = oldLabels;
classBody.body.push(this.finishNode(member, "StaticBlock"));
if ((_member$decorators = member.decorators) != null && _member$decorators.length) {
this.raise(_parseError.Errors.DecoratorStaticBlock, {
at: member
});
}
}
pushClassProperty(classBody, prop) {
if (!prop.computed && (prop.key.name === "constructor" || prop.key.value === "constructor")) {
this.raise(_parseError.Errors.ConstructorClassField, {
at: prop.key
});
}
classBody.body.push(this.parseClassProperty(prop));
}
pushClassPrivateProperty(classBody, prop) {
const node = this.parseClassPrivateProperty(prop);
classBody.body.push(node);
this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), _scopeflags.CLASS_ELEMENT_OTHER, node.key.loc.start);
}
pushClassAccessorProperty(classBody, prop, isPrivate) {
if (!isPrivate && !prop.computed) {
const key = prop.key;
if (key.name === "constructor" || key.value === "constructor") {
this.raise(_parseError.Errors.ConstructorClassField, {
at: key
});
}
}
const node = this.parseClassAccessorProperty(prop);
classBody.body.push(node);
if (isPrivate) {
this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), _scopeflags.CLASS_ELEMENT_OTHER, node.key.loc.start);
}
}
pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
classBody.body.push(this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true));
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
const node = this.parseMethod(method, isGenerator, isAsync, false, false, "ClassPrivateMethod", true);
classBody.body.push(node);
const kind = node.kind === "get" ? node.static ? _scopeflags.CLASS_ELEMENT_STATIC_GETTER : _scopeflags.CLASS_ELEMENT_INSTANCE_GETTER : node.kind === "set" ? node.static ? _scopeflags.CLASS_ELEMENT_STATIC_SETTER : _scopeflags.CLASS_ELEMENT_INSTANCE_SETTER : _scopeflags.CLASS_ELEMENT_OTHER;
this.declareClassPrivateMethodInScope(node, kind);
}
declareClassPrivateMethodInScope(node, kind) {
this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), kind, node.key.loc.start);
}
parsePostMemberNameModifiers(methodOrProp) {}
parseClassPrivateProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, "ClassPrivateProperty");
}
parseClassProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, "ClassProperty");
}
parseClassAccessorProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, "ClassAccessorProperty");
}
parseInitializer(node) {
this.scope.enter(_scopeflags.SCOPE_CLASS | _scopeflags.SCOPE_SUPER);
this.expressionScope.enter((0, _expressionScope.newExpressionScope)());
this.prodParam.enter(_productionParameter.PARAM);
node.value = this.eat(29) ? this.parseMaybeAssignAllowIn() : null;
this.expressionScope.exit();
this.prodParam.exit();
this.scope.exit();
}
parseClassId(node, isStatement, optionalId, bindingType = _scopeflags.BIND_CLASS) {
if ((0, _types.tokenIsIdentifier)(this.state.type)) {
node.id = this.parseIdentifier();
if (isStatement) {
this.declareNameFromIdentifier(node.id, bindingType);
}
} else {
if (optionalId || !isStatement) {
node.id = null;
} else {
throw this.raise(_parseError.Errors.MissingClassName, {
at: this.state.startLoc
});
}
}
}
parseClassSuper(node) {
node.superClass = this.eat(81) ? this.parseExprSubscripts() : null;
}
parseExport(node, decorators) {
const maybeDefaultIdentifier = this.parseMaybeImportPhase(node, true);
const hasDefault = this.maybeParseExportDefaultSpecifier(node, maybeDefaultIdentifier);
const parseAfterDefault = !hasDefault || this.eat(12);
const hasStar = parseAfterDefault && this.eatExportStar(node);
const hasNamespace = hasStar && this.maybeParseExportNamespaceSpecifier(node);
const parseAfterNamespace = parseAfterDefault && (!hasNamespace || this.eat(12));
const isFromRequired = hasDefault || hasStar;
if (hasStar && !hasNamespace) {
if (hasDefault) this.unexpected();
if (decorators) {