eslint-config-chain-able
Version:
an opinionated ESLint configuration
1,219 lines (1,195 loc) • 266 kB
JavaScript
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/* 0 */
/***/ function(module, exports, __webpack_require__) {
/*
Copyright JS Foundation and other contributors, https://js.foundation/
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
"use strict";
var comment_handler_1 = __webpack_require__(1);
var parser_1 = __webpack_require__(3);
var jsx_parser_1 = __webpack_require__(11);
var tokenizer_1 = __webpack_require__(15);
function parse(code, options, delegate) {
var commentHandler = null;
var proxyDelegate = function (node, metadata) {
if (delegate) {
delegate(node, metadata);
}
if (commentHandler) {
commentHandler.visit(node, metadata);
}
};
var parserDelegate = (typeof delegate === 'function') ? proxyDelegate : null;
var collectComment = false;
if (options) {
collectComment = (typeof options.comment === 'boolean' && options.comment);
var attachComment = (typeof options.attachComment === 'boolean' && options.attachComment);
if (collectComment || attachComment) {
commentHandler = new comment_handler_1.CommentHandler();
commentHandler.attach = attachComment;
options.comment = true;
parserDelegate = proxyDelegate;
}
}
var parser;
if (options && typeof options.jsx === 'boolean' && options.jsx) {
parser = new jsx_parser_1.JSXParser(code, options, parserDelegate);
}
else {
parser = new parser_1.Parser(code, options, parserDelegate);
}
var ast = (parser.parseProgram());
if (collectComment) {
ast.comments = commentHandler.comments;
}
if (parser.config.tokens) {
ast.tokens = parser.tokens;
}
if (parser.config.tolerant) {
ast.errors = parser.errorHandler.errors;
}
return ast;
}
exports.parse = parse;
function tokenize(code, options, delegate) {
var tokenizer = new tokenizer_1.Tokenizer(code, options);
var tokens;
tokens = [];
try {
while (true) {
var token = tokenizer.getNextToken();
if (!token) {
break;
}
if (delegate) {
token = delegate(token);
}
tokens.push(token);
}
}
catch (e) {
tokenizer.errorHandler.tolerate(e);
}
if (tokenizer.errorHandler.tolerant) {
tokens.errors = tokenizer.errors();
}
return tokens;
}
exports.tokenize = tokenize;
var syntax_1 = __webpack_require__(2);
exports.Syntax = syntax_1.Syntax;
// Sync with *.json manifests.
exports.version = '3.1.3';
/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {
"use strict";
var syntax_1 = __webpack_require__(2);
var CommentHandler = (function () {
function CommentHandler() {
this.attach = false;
this.comments = [];
this.stack = [];
this.leading = [];
this.trailing = [];
}
CommentHandler.prototype.insertInnerComments = function (node, metadata) {
// innnerComments for properties empty block
// `function a() {/** comments **\/}`
if (node.type === syntax_1.Syntax.BlockStatement && node.body.length === 0) {
var innerComments = [];
for (var i = this.leading.length - 1; i >= 0; --i) {
var entry = this.leading[i];
if (metadata.end.offset >= entry.start) {
innerComments.unshift(entry.comment);
this.leading.splice(i, 1);
this.trailing.splice(i, 1);
}
}
if (innerComments.length) {
node.innerComments = innerComments;
}
}
};
CommentHandler.prototype.findTrailingComments = function (node, metadata) {
var trailingComments = [];
if (this.trailing.length > 0) {
for (var i = this.trailing.length - 1; i >= 0; --i) {
var entry_1 = this.trailing[i];
if (entry_1.start >= metadata.end.offset) {
trailingComments.unshift(entry_1.comment);
}
}
this.trailing.length = 0;
return trailingComments;
}
var entry = this.stack[this.stack.length - 1];
if (entry && entry.node.trailingComments) {
var firstComment = entry.node.trailingComments[0];
if (firstComment && firstComment.range[0] >= metadata.end.offset) {
trailingComments = entry.node.trailingComments;
delete entry.node.trailingComments;
}
}
return trailingComments;
};
CommentHandler.prototype.findLeadingComments = function (node, metadata) {
var leadingComments = [];
var target;
while (this.stack.length > 0) {
var entry = this.stack[this.stack.length - 1];
if (entry && entry.start >= metadata.start.offset) {
target = this.stack.pop().node;
}
else {
break;
}
}
if (target) {
var count = target.leadingComments ? target.leadingComments.length : 0;
for (var i = count - 1; i >= 0; --i) {
var comment = target.leadingComments[i];
if (comment.range[1] <= metadata.start.offset) {
leadingComments.unshift(comment);
target.leadingComments.splice(i, 1);
}
}
if (target.leadingComments && target.leadingComments.length === 0) {
delete target.leadingComments;
}
return leadingComments;
}
for (var i = this.leading.length - 1; i >= 0; --i) {
var entry = this.leading[i];
if (entry.start <= metadata.start.offset) {
leadingComments.unshift(entry.comment);
this.leading.splice(i, 1);
}
}
return leadingComments;
};
CommentHandler.prototype.visitNode = function (node, metadata) {
if (node.type === syntax_1.Syntax.Program && node.body.length > 0) {
return;
}
this.insertInnerComments(node, metadata);
var trailingComments = this.findTrailingComments(node, metadata);
var leadingComments = this.findLeadingComments(node, metadata);
if (leadingComments.length > 0) {
node.leadingComments = leadingComments;
}
if (trailingComments.length > 0) {
node.trailingComments = trailingComments;
}
this.stack.push({
node: node,
start: metadata.start.offset
});
};
CommentHandler.prototype.visitComment = function (node, metadata) {
var type = (node.type[0] === 'L') ? 'Line' : 'Block';
var comment = {
type: type,
value: node.value
};
if (node.range) {
comment.range = node.range;
}
if (node.loc) {
comment.loc = node.loc;
}
this.comments.push(comment);
if (this.attach) {
var entry = {
comment: {
type: type,
value: node.value,
range: [metadata.start.offset, metadata.end.offset]
},
start: metadata.start.offset
};
if (node.loc) {
entry.comment.loc = node.loc;
}
node.type = type;
this.leading.push(entry);
this.trailing.push(entry);
}
};
CommentHandler.prototype.visit = function (node, metadata) {
if (node.type === 'LineComment') {
this.visitComment(node, metadata);
}
else if (node.type === 'BlockComment') {
this.visitComment(node, metadata);
}
else if (this.attach) {
this.visitNode(node, metadata);
}
};
return CommentHandler;
}());
exports.CommentHandler = CommentHandler;
/***/ },
/* 2 */
/***/ function(module, exports) {
"use strict";
exports.Syntax = {
AssignmentExpression: 'AssignmentExpression',
AssignmentPattern: 'AssignmentPattern',
ArrayExpression: 'ArrayExpression',
ArrayPattern: 'ArrayPattern',
ArrowFunctionExpression: 'ArrowFunctionExpression',
BlockStatement: 'BlockStatement',
BinaryExpression: 'BinaryExpression',
BreakStatement: 'BreakStatement',
CallExpression: 'CallExpression',
CatchClause: 'CatchClause',
ClassBody: 'ClassBody',
ClassDeclaration: 'ClassDeclaration',
ClassExpression: 'ClassExpression',
ConditionalExpression: 'ConditionalExpression',
ContinueStatement: 'ContinueStatement',
DoWhileStatement: 'DoWhileStatement',
DebuggerStatement: 'DebuggerStatement',
EmptyStatement: 'EmptyStatement',
ExportAllDeclaration: 'ExportAllDeclaration',
ExportDefaultDeclaration: 'ExportDefaultDeclaration',
ExportNamedDeclaration: 'ExportNamedDeclaration',
ExportSpecifier: 'ExportSpecifier',
ExpressionStatement: 'ExpressionStatement',
ForStatement: 'ForStatement',
ForOfStatement: 'ForOfStatement',
ForInStatement: 'ForInStatement',
FunctionDeclaration: 'FunctionDeclaration',
FunctionExpression: 'FunctionExpression',
Identifier: 'Identifier',
IfStatement: 'IfStatement',
ImportDeclaration: 'ImportDeclaration',
ImportDefaultSpecifier: 'ImportDefaultSpecifier',
ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
ImportSpecifier: 'ImportSpecifier',
Literal: 'Literal',
LabeledStatement: 'LabeledStatement',
LogicalExpression: 'LogicalExpression',
MemberExpression: 'MemberExpression',
MetaProperty: 'MetaProperty',
MethodDefinition: 'MethodDefinition',
NewExpression: 'NewExpression',
ObjectExpression: 'ObjectExpression',
ObjectPattern: 'ObjectPattern',
Program: 'Program',
Property: 'Property',
RestElement: 'RestElement',
ReturnStatement: 'ReturnStatement',
SequenceExpression: 'SequenceExpression',
SpreadElement: 'SpreadElement',
Super: 'Super',
SwitchCase: 'SwitchCase',
SwitchStatement: 'SwitchStatement',
TaggedTemplateExpression: 'TaggedTemplateExpression',
TemplateElement: 'TemplateElement',
TemplateLiteral: 'TemplateLiteral',
ThisExpression: 'ThisExpression',
ThrowStatement: 'ThrowStatement',
TryStatement: 'TryStatement',
UnaryExpression: 'UnaryExpression',
UpdateExpression: 'UpdateExpression',
VariableDeclaration: 'VariableDeclaration',
VariableDeclarator: 'VariableDeclarator',
WhileStatement: 'WhileStatement',
WithStatement: 'WithStatement',
YieldExpression: 'YieldExpression'
};
/***/ },
/* 3 */
/***/ function(module, exports, __webpack_require__) {
"use strict";
var assert_1 = __webpack_require__(4);
var messages_1 = __webpack_require__(5);
var error_handler_1 = __webpack_require__(6);
var token_1 = __webpack_require__(7);
var scanner_1 = __webpack_require__(8);
var syntax_1 = __webpack_require__(2);
var Node = __webpack_require__(10);
var ArrowParameterPlaceHolder = 'ArrowParameterPlaceHolder';
var Parser = (function () {
function Parser(code, options, delegate) {
if (options === void 0) { options = {}; }
this.config = {
range: (typeof options.range === 'boolean') && options.range,
loc: (typeof options.loc === 'boolean') && options.loc,
source: null,
tokens: (typeof options.tokens === 'boolean') && options.tokens,
comment: (typeof options.comment === 'boolean') && options.comment,
tolerant: (typeof options.tolerant === 'boolean') && options.tolerant
};
if (this.config.loc && options.source && options.source !== null) {
this.config.source = String(options.source);
}
this.delegate = delegate;
this.errorHandler = new error_handler_1.ErrorHandler();
this.errorHandler.tolerant = this.config.tolerant;
this.scanner = new scanner_1.Scanner(code, this.errorHandler);
this.scanner.trackComment = this.config.comment;
this.operatorPrecedence = {
')': 0,
';': 0,
',': 0,
'=': 0,
']': 0,
'||': 1,
'&&': 2,
'|': 3,
'^': 4,
'&': 5,
'==': 6,
'!=': 6,
'===': 6,
'!==': 6,
'<': 7,
'>': 7,
'<=': 7,
'>=': 7,
'<<': 8,
'>>': 8,
'>>>': 8,
'+': 9,
'-': 9,
'*': 11,
'/': 11,
'%': 11
};
this.sourceType = (options && options.sourceType === 'module') ? 'module' : 'script';
this.lookahead = null;
this.hasLineTerminator = false;
this.context = {
allowIn: true,
allowYield: true,
firstCoverInitializedNameError: null,
isAssignmentTarget: false,
isBindingElement: false,
inFunctionBody: false,
inIteration: false,
inSwitch: false,
labelSet: {},
strict: (this.sourceType === 'module')
};
this.tokens = [];
this.startMarker = {
index: 0,
lineNumber: this.scanner.lineNumber,
lineStart: 0
};
this.lastMarker = {
index: 0,
lineNumber: this.scanner.lineNumber,
lineStart: 0
};
this.nextToken();
this.lastMarker = {
index: this.scanner.index,
lineNumber: this.scanner.lineNumber,
lineStart: this.scanner.lineStart
};
}
Parser.prototype.throwError = function (messageFormat) {
var values = [];
for (var _i = 1; _i < arguments.length; _i++) {
values[_i - 1] = arguments[_i];
}
var args = Array.prototype.slice.call(arguments, 1);
var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) {
assert_1.assert(idx < args.length, 'Message reference must be in range');
return args[idx];
});
var index = this.lastMarker.index;
var line = this.lastMarker.lineNumber;
var column = this.lastMarker.index - this.lastMarker.lineStart + 1;
throw this.errorHandler.createError(index, line, column, msg);
};
Parser.prototype.tolerateError = function (messageFormat) {
var values = [];
for (var _i = 1; _i < arguments.length; _i++) {
values[_i - 1] = arguments[_i];
}
var args = Array.prototype.slice.call(arguments, 1);
var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) {
assert_1.assert(idx < args.length, 'Message reference must be in range');
return args[idx];
});
var index = this.lastMarker.index;
var line = this.scanner.lineNumber;
var column = this.lastMarker.index - this.lastMarker.lineStart + 1;
this.errorHandler.tolerateError(index, line, column, msg);
};
// Throw an exception because of the token.
Parser.prototype.unexpectedTokenError = function (token, message) {
var msg = message || messages_1.Messages.UnexpectedToken;
var value;
if (token) {
if (!message) {
msg = (token.type === token_1.Token.EOF) ? messages_1.Messages.UnexpectedEOS :
(token.type === token_1.Token.Identifier) ? messages_1.Messages.UnexpectedIdentifier :
(token.type === token_1.Token.NumericLiteral) ? messages_1.Messages.UnexpectedNumber :
(token.type === token_1.Token.StringLiteral) ? messages_1.Messages.UnexpectedString :
(token.type === token_1.Token.Template) ? messages_1.Messages.UnexpectedTemplate :
messages_1.Messages.UnexpectedToken;
if (token.type === token_1.Token.Keyword) {
if (this.scanner.isFutureReservedWord(token.value)) {
msg = messages_1.Messages.UnexpectedReserved;
}
else if (this.context.strict && this.scanner.isStrictModeReservedWord(token.value)) {
msg = messages_1.Messages.StrictReservedWord;
}
}
}
value = (token.type === token_1.Token.Template) ? token.value.raw : token.value;
}
else {
value = 'ILLEGAL';
}
msg = msg.replace('%0', value);
if (token && typeof token.lineNumber === 'number') {
var index = token.start;
var line = token.lineNumber;
var column = token.start - this.lastMarker.lineStart + 1;
return this.errorHandler.createError(index, line, column, msg);
}
else {
var index = this.lastMarker.index;
var line = this.lastMarker.lineNumber;
var column = index - this.lastMarker.lineStart + 1;
return this.errorHandler.createError(index, line, column, msg);
}
};
Parser.prototype.throwUnexpectedToken = function (token, message) {
throw this.unexpectedTokenError(token, message);
};
Parser.prototype.tolerateUnexpectedToken = function (token, message) {
this.errorHandler.tolerate(this.unexpectedTokenError(token, message));
};
Parser.prototype.collectComments = function () {
if (!this.config.comment) {
this.scanner.scanComments();
}
else {
var comments = this.scanner.scanComments();
if (comments.length > 0 && this.delegate) {
for (var i = 0; i < comments.length; ++i) {
var e = comments[i];
var node = void 0;
node = {
type: e.multiLine ? 'BlockComment' : 'LineComment',
value: this.scanner.source.slice(e.slice[0], e.slice[1])
};
if (this.config.range) {
node.range = e.range;
}
if (this.config.loc) {
node.loc = e.loc;
}
var metadata = {
start: {
line: e.loc.start.line,
column: e.loc.start.column,
offset: e.range[0]
},
end: {
line: e.loc.end.line,
column: e.loc.end.column,
offset: e.range[1]
}
};
this.delegate(node, metadata);
}
}
}
};
// From internal representation to an external structure
Parser.prototype.getTokenRaw = function (token) {
return this.scanner.source.slice(token.start, token.end);
};
Parser.prototype.convertToken = function (token) {
var t;
t = {
type: token_1.TokenName[token.type],
value: this.getTokenRaw(token)
};
if (this.config.range) {
t.range = [token.start, token.end];
}
if (this.config.loc) {
t.loc = {
start: {
line: this.startMarker.lineNumber,
column: this.startMarker.index - this.startMarker.lineStart
},
end: {
line: this.scanner.lineNumber,
column: this.scanner.index - this.scanner.lineStart
}
};
}
if (token.regex) {
t.regex = token.regex;
}
return t;
};
Parser.prototype.nextToken = function () {
var token = this.lookahead;
this.lastMarker.index = this.scanner.index;
this.lastMarker.lineNumber = this.scanner.lineNumber;
this.lastMarker.lineStart = this.scanner.lineStart;
this.collectComments();
this.startMarker.index = this.scanner.index;
this.startMarker.lineNumber = this.scanner.lineNumber;
this.startMarker.lineStart = this.scanner.lineStart;
var next;
next = this.scanner.lex();
this.hasLineTerminator = (token && next) ? (token.lineNumber !== next.lineNumber) : false;
if (next && this.context.strict && next.type === token_1.Token.Identifier) {
if (this.scanner.isStrictModeReservedWord(next.value)) {
next.type = token_1.Token.Keyword;
}
}
this.lookahead = next;
if (this.config.tokens && next.type !== token_1.Token.EOF) {
this.tokens.push(this.convertToken(next));
}
return token;
};
Parser.prototype.nextRegexToken = function () {
this.collectComments();
var token = this.scanner.scanRegExp();
if (this.config.tokens) {
// Pop the previous token, '/' or '/='
// This is added from the lookahead token.
this.tokens.pop();
this.tokens.push(this.convertToken(token));
}
// Prime the next lookahead.
this.lookahead = token;
this.nextToken();
return token;
};
Parser.prototype.createNode = function () {
return {
index: this.startMarker.index,
line: this.startMarker.lineNumber,
column: this.startMarker.index - this.startMarker.lineStart
};
};
Parser.prototype.startNode = function (token) {
return {
index: token.start,
line: token.lineNumber,
column: token.start - token.lineStart
};
};
Parser.prototype.finalize = function (meta, node) {
if (this.config.range) {
node.range = [meta.index, this.lastMarker.index];
}
if (this.config.loc) {
node.loc = {
start: {
line: meta.line,
column: meta.column
},
end: {
line: this.lastMarker.lineNumber,
column: this.lastMarker.index - this.lastMarker.lineStart
}
};
if (this.config.source) {
node.loc.source = this.config.source;
}
}
if (this.delegate) {
var metadata = {
start: {
line: meta.line,
column: meta.column,
offset: meta.index
},
end: {
line: this.lastMarker.lineNumber,
column: this.lastMarker.index - this.lastMarker.lineStart,
offset: this.lastMarker.index
}
};
this.delegate(node, metadata);
}
return node;
};
// Expect the next token to match the specified punctuator.
// If not, an exception will be thrown.
Parser.prototype.expect = function (value) {
var token = this.nextToken();
if (token.type !== token_1.Token.Punctuator || token.value !== value) {
this.throwUnexpectedToken(token);
}
};
// Quietly expect a comma when in tolerant mode, otherwise delegates to expect().
Parser.prototype.expectCommaSeparator = function () {
if (this.config.tolerant) {
var token = this.lookahead;
if (token.type === token_1.Token.Punctuator && token.value === ',') {
this.nextToken();
}
else if (token.type === token_1.Token.Punctuator && token.value === ';') {
this.nextToken();
this.tolerateUnexpectedToken(token);
}
else {
this.tolerateUnexpectedToken(token, messages_1.Messages.UnexpectedToken);
}
}
else {
this.expect(',');
}
};
// Expect the next token to match the specified keyword.
// If not, an exception will be thrown.
Parser.prototype.expectKeyword = function (keyword) {
var token = this.nextToken();
if (token.type !== token_1.Token.Keyword || token.value !== keyword) {
this.throwUnexpectedToken(token);
}
};
// Return true if the next token matches the specified punctuator.
Parser.prototype.match = function (value) {
return this.lookahead.type === token_1.Token.Punctuator && this.lookahead.value === value;
};
// Return true if the next token matches the specified keyword
Parser.prototype.matchKeyword = function (keyword) {
return this.lookahead.type === token_1.Token.Keyword && this.lookahead.value === keyword;
};
// Return true if the next token matches the specified contextual keyword
// (where an identifier is sometimes a keyword depending on the context)
Parser.prototype.matchContextualKeyword = function (keyword) {
return this.lookahead.type === token_1.Token.Identifier && this.lookahead.value === keyword;
};
// Return true if the next token is an assignment operator
Parser.prototype.matchAssign = function () {
if (this.lookahead.type !== token_1.Token.Punctuator) {
return false;
}
var op = this.lookahead.value;
return op === '=' ||
op === '*=' ||
op === '**=' ||
op === '/=' ||
op === '%=' ||
op === '+=' ||
op === '-=' ||
op === '<<=' ||
op === '>>=' ||
op === '>>>=' ||
op === '&=' ||
op === '^=' ||
op === '|=';
};
// Cover grammar support.
//
// When an assignment expression position starts with an left parenthesis, the determination of the type
// of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)
// or the first comma. This situation also defers the determination of all the expressions nested in the pair.
//
// There are three productions that can be parsed in a parentheses pair that needs to be determined
// after the outermost pair is closed. They are:
//
// 1. AssignmentExpression
// 2. BindingElements
// 3. AssignmentTargets
//
// In order to avoid exponential backtracking, we use two flags to denote if the production can be
// binding element or assignment target.
//
// The three productions have the relationship:
//
// BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression
//
// with a single exception that CoverInitializedName when used directly in an Expression, generates
// an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the
// first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.
//
// isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not
// effect the current flags. This means the production the parser parses is only used as an expression. Therefore
// the CoverInitializedName check is conducted.
//
// inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates
// the flags outside of the parser. This means the production the parser parses is used as a part of a potential
// pattern. The CoverInitializedName check is deferred.
Parser.prototype.isolateCoverGrammar = function (parseFunction) {
var previousIsBindingElement = this.context.isBindingElement;
var previousIsAssignmentTarget = this.context.isAssignmentTarget;
var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError;
this.context.isBindingElement = true;
this.context.isAssignmentTarget = true;
this.context.firstCoverInitializedNameError = null;
var result = parseFunction.call(this);
if (this.context.firstCoverInitializedNameError !== null) {
this.throwUnexpectedToken(this.context.firstCoverInitializedNameError);
}
this.context.isBindingElement = previousIsBindingElement;
this.context.isAssignmentTarget = previousIsAssignmentTarget;
this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError;
return result;
};
Parser.prototype.inheritCoverGrammar = function (parseFunction) {
var previousIsBindingElement = this.context.isBindingElement;
var previousIsAssignmentTarget = this.context.isAssignmentTarget;
var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError;
this.context.isBindingElement = true;
this.context.isAssignmentTarget = true;
this.context.firstCoverInitializedNameError = null;
var result = parseFunction.call(this);
this.context.isBindingElement = this.context.isBindingElement && previousIsBindingElement;
this.context.isAssignmentTarget = this.context.isAssignmentTarget && previousIsAssignmentTarget;
this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError || this.context.firstCoverInitializedNameError;
return result;
};
Parser.prototype.consumeSemicolon = function () {
if (this.match(';')) {
this.nextToken();
}
else if (!this.hasLineTerminator) {
if (this.lookahead.type !== token_1.Token.EOF && !this.match('}')) {
this.throwUnexpectedToken(this.lookahead);
}
this.lastMarker.index = this.startMarker.index;
this.lastMarker.lineNumber = this.startMarker.lineNumber;
this.lastMarker.lineStart = this.startMarker.lineStart;
}
};
// ECMA-262 12.2 Primary Expressions
Parser.prototype.parsePrimaryExpression = function () {
var node = this.createNode();
var expr;
var value, token, raw;
switch (this.lookahead.type) {
case token_1.Token.Identifier:
if (this.sourceType === 'module' && this.lookahead.value === 'await') {
this.tolerateUnexpectedToken(this.lookahead);
}
expr = this.finalize(node, new Node.Identifier(this.nextToken().value));
break;
case token_1.Token.NumericLiteral:
case token_1.Token.StringLiteral:
if (this.context.strict && this.lookahead.octal) {
this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.StrictOctalLiteral);
}
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
token = this.nextToken();
raw = this.getTokenRaw(token);
expr = this.finalize(node, new Node.Literal(token.value, raw));
break;
case token_1.Token.BooleanLiteral:
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
token = this.nextToken();
token.value = (token.value === 'true');
raw = this.getTokenRaw(token);
expr = this.finalize(node, new Node.Literal(token.value, raw));
break;
case token_1.Token.NullLiteral:
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
token = this.nextToken();
token.value = null;
raw = this.getTokenRaw(token);
expr = this.finalize(node, new Node.Literal(token.value, raw));
break;
case token_1.Token.Template:
expr = this.parseTemplateLiteral();
break;
case token_1.Token.Punctuator:
value = this.lookahead.value;
switch (value) {
case '(':
this.context.isBindingElement = false;
expr = this.inheritCoverGrammar(this.parseGroupExpression);
break;
case '[':
expr = this.inheritCoverGrammar(this.parseArrayInitializer);
break;
case '{':
expr = this.inheritCoverGrammar(this.parseObjectInitializer);
break;
case '/':
case '/=':
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
this.scanner.index = this.startMarker.index;
token = this.nextRegexToken();
raw = this.getTokenRaw(token);
expr = this.finalize(node, new Node.RegexLiteral(token.value, raw, token.regex));
break;
default:
this.throwUnexpectedToken(this.nextToken());
}
break;
case token_1.Token.Keyword:
if (!this.context.strict && this.context.allowYield && this.matchKeyword('yield')) {
expr = this.parseIdentifierName();
}
else if (!this.context.strict && this.matchKeyword('let')) {
expr = this.finalize(node, new Node.Identifier(this.nextToken().value));
}
else {
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
if (this.matchKeyword('function')) {
expr = this.parseFunctionExpression();
}
else if (this.matchKeyword('this')) {
this.nextToken();
expr = this.finalize(node, new Node.ThisExpression());
}
else if (this.matchKeyword('class')) {
expr = this.parseClassExpression();
}
else {
this.throwUnexpectedToken(this.nextToken());
}
}
break;
default:
this.throwUnexpectedToken(this.nextToken());
}
return expr;
};
// ECMA-262 12.2.5 Array Initializer
Parser.prototype.parseSpreadElement = function () {
var node = this.createNode();
this.expect('...');
var arg = this.inheritCoverGrammar(this.parseAssignmentExpression);
return this.finalize(node, new Node.SpreadElement(arg));
};
Parser.prototype.parseArrayInitializer = function () {
var node = this.createNode();
var elements = [];
this.expect('[');
while (!this.match(']')) {
if (this.match(',')) {
this.nextToken();
elements.push(null);
}
else if (this.match('...')) {
var element = this.parseSpreadElement();
if (!this.match(']')) {
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
this.expect(',');
}
elements.push(element);
}
else {
elements.push(this.inheritCoverGrammar(this.parseAssignmentExpression));
if (!this.match(']')) {
this.expect(',');
}
}
}
this.expect(']');
return this.finalize(node, new Node.ArrayExpression(elements));
};
// ECMA-262 12.2.6 Object Initializer
Parser.prototype.parsePropertyMethod = function (params) {
this.context.isAssignmentTarget = false;
this.context.isBindingElement = false;
var previousStrict = this.context.strict;
var body = this.isolateCoverGrammar(this.parseFunctionSourceElements);
if (this.context.strict && params.firstRestricted) {
this.tolerateUnexpectedToken(params.firstRestricted, params.message);
}
if (this.context.strict && params.stricted) {
this.tolerateUnexpectedToken(params.stricted, params.message);
}
this.context.strict = previousStrict;
return body;
};
Parser.prototype.parsePropertyMethodFunction = function () {
var isGenerator = false;
var node = this.createNode();
var previousAllowYield = this.context.allowYield;
this.context.allowYield = false;
var params = this.parseFormalParameters();
var method = this.parsePropertyMethod(params);
this.context.allowYield = previousAllowYield;
return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator));
};
Parser.prototype.parseObjectPropertyKey = function () {
var node = this.createNode();
var token = this.nextToken();
var key = null;
switch (token.type) {
case token_1.Token.StringLiteral:
case token_1.Token.NumericLiteral:
if (this.context.strict && token.octal) {
this.tolerateUnexpectedToken(token, messages_1.Messages.StrictOctalLiteral);
}
var raw = this.getTokenRaw(token);
key = this.finalize(node, new Node.Literal(token.value, raw));
break;
case token_1.Token.Identifier:
case token_1.Token.BooleanLiteral:
case token_1.Token.NullLiteral:
case token_1.Token.Keyword:
key = this.finalize(node, new Node.Identifier(token.value));
break;
case token_1.Token.Punctuator:
if (token.value === '[') {
key = this.isolateCoverGrammar(this.parseAssignmentExpression);
this.expect(']');
}
else {
this.throwUnexpectedToken(token);
}
break;
default:
this.throwUnexpectedToken(token);
}
return key;
};
Parser.prototype.isPropertyKey = function (key, value) {
return (key.type === syntax_1.Syntax.Identifier && key.name === value) ||
(key.type === syntax_1.Syntax.Literal && key.value === value);
};
Parser.prototype.parseObjectProperty = function (hasProto) {
var node = this.createNode();
var token = this.lookahead;
var kind;
var key;
var value;
var computed = false;
var method = false;
var shorthand = false;
if (token.type === token_1.Token.Identifier) {
this.nextToken();
key = this.finalize(node, new Node.Identifier(token.value));
}
else if (this.match('*')) {
this.nextToken();
}
else {
computed = this.match('[');
key = this.parseObjectPropertyKey();
}
var lookaheadPropertyKey = this.qualifiedPropertyName(this.lookahead);
if (token.type === token_1.Token.Identifier && token.value === 'get' && lookaheadPropertyKey) {
kind = 'get';
computed = this.match('[');
key = this.parseObjectPropertyKey();
this.context.allowYield = false;
value = this.parseGetterMethod();
}
else if (token.type === token_1.Token.Identifier && token.value === 'set' && lookaheadPropertyKey) {
kind = 'set';
computed = this.match('[');
key = this.parseObjectPropertyKey();
value = this.parseSetterMethod();
}
else if (token.type === token_1.Token.Punctuator && token.value === '*' && lookaheadPropertyKey) {
kind = 'init';
computed = this.match('[');
key = this.parseObjectPropertyKey();
value = this.parseGeneratorMethod();
method = true;
}
else {
if (!key) {
this.throwUnexpectedToken(this.lookahead);
}
kind = 'init';
if (this.match(':')) {
if (!computed && this.isPropertyKey(key, '__proto__')) {
if (hasProto.value) {
this.tolerateError(messages_1.Messages.DuplicateProtoProperty);
}
hasProto.value = true;
}
this.nextToken();
value = this.inheritCoverGrammar(this.parseAssignmentExpression);
}
else if (this.match('(')) {
value = this.parsePropertyMethodFunction();
method = true;
}
else if (token.type === token_1.Token.Identifier) {
var id = this.finalize(node, new Node.Identifier(token.value));
if (this.match('=')) {
this.context.firstCoverInitializedNameError = this.lookahead;
this.nextToken();
shorthand = true;
var init = this.isolateCoverGrammar(this.parseAssignmentExpression);
value = this.finalize(node, new Node.AssignmentPattern(id, init));
}
else {
shorthand = true;
value = id;
}
}
else {
this.throwUnexpectedToken(this.nextToken());
}
}
return this.finalize(node, new Node.Property(kind, key, computed, value, method, shorthand));
};
Parser.prototype.parseObjectInitializer = function () {
var node = this.createNode();
this.expect('{');
var properties = [];
var hasProto = { value: false };
while (!this.match('}')) {
properties.push(this.parseObjectProperty(hasProto));
if (!this.match('}')) {
this.expectCommaSeparator();
}
}
this.expect('}');
return this.finalize(node, new Node.ObjectExpression(properties));
};
// ECMA-262 12.2.9 Template Literals
Parser.prototype.parseTemplateHead = function () {
assert_1.assert(this.lookahead.head, 'Template literal must start with a template head');
var node = this.createNode();
var token = this.nextToken();
var value = {
raw: token.value.raw,
cooked: token.value.cooked
};
return this.finalize(node, new Node.TemplateElement(value, token.tail));
};
Parser.prototype.parseTemplateElement = function () {
if (this.lookahead.type !== token_1.Token.Template) {
this.throwUnexpectedToken();
}
var node = this.createNode();
var token = this.nextToken();
var value = {
raw: token.value.raw,
cooked: token.value.cooked
};
return this.finalize(node, new Node.TemplateElement(value, token.tail));
};
Parser.prototype.parseTemplateLiteral = function () {
var node = this.createNode();
var expressions = [];
var quasis = [];
var quasi = this.parseTemplateHead();
quasis.push(quasi);
while (!quasi.tail) {
expressions.push(this.parseExpression());
quasi = this.parseTemplateElement();
quasis.push(quasi);
}
return this.finalize(node, new Node.TemplateLiteral(quasis, expressions));
};
// ECMA-262 12.2.10 The Grouping Operator
Parser.prototype.reinterpretExpressionAsPattern = function (expr) {
switch (expr.type) {
case syntax_1.Syntax.Identifier:
case syntax_1.Syntax.MemberExpression:
case syntax_1.Syntax.RestElement:
case syntax_1.Syntax.AssignmentPattern:
break;
case syntax_1.Syntax.SpreadElement:
expr.type = syntax_1.Syntax.RestElement;
this.reinterpretExpressionAsPattern(expr.argument);
break;
case syntax_1.Syntax.ArrayExpression:
expr.type = syntax_1.Syntax.ArrayPattern;
for (var i = 0; i < expr.elements.length; i++) {
if (expr.elements[i] !== null) {
this.reinterpretExpressionAsPattern(expr.elements[i]);
}
}
break;
case syntax_1.Syntax.ObjectExpression:
expr.type = syntax_1.Syntax.ObjectPattern;
for (var i = 0; i < expr.properties.length; i++) {
this.reinterpretExpressionAsPattern(expr.properties[i].value);
}
break;
case syntax_1.Syntax.AssignmentExpression:
expr.type = syntax_1.Syntax.AssignmentPattern;
delete expr.operator;
this.reinterpretExpressionAsPattern(expr.left);
break;
default:
// Allow other node type for tolerant parsing.
break;
}
};
Parser.prototype.parseGroupExpression = function () {
var expr;
this.expect('(');
if (this.match(')')) {
this.nextToken();
if (!this.match('=>')) {
this.expect('=>')