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3362 lines
119 KiB
3362 lines
119 KiB
/*********************************************************************** |
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A JavaScript tokenizer / parser / beautifier / compressor. |
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https://github.com/mishoo/UglifyJS2 |
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-------------------------------- (C) --------------------------------- |
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Author: Mihai Bazon |
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<mihai.bazon@gmail.com> |
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http://mihai.bazon.net/blog |
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Distributed under the BSD license: |
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com> |
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Parser based on parse-js (http://marijn.haverbeke.nl/parse-js/). |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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* Redistributions of source code must retain the above |
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copyright notice, this list of conditions and the following |
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disclaimer. |
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* Redistributions in binary form must reproduce the above |
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copyright notice, this list of conditions and the following |
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disclaimer in the documentation and/or other materials |
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provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY |
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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***********************************************************************/ |
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"use strict"; |
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import { |
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characters, |
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defaults, |
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makePredicate, |
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set_annotation, |
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} from "./utils/index.js"; |
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import { |
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AST_Accessor, |
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AST_Array, |
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AST_Arrow, |
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AST_Assign, |
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AST_Await, |
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AST_BigInt, |
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AST_Binary, |
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AST_BlockStatement, |
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AST_Break, |
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AST_Call, |
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AST_Case, |
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AST_Catch, |
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AST_Chain, |
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AST_ClassExpression, |
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AST_ClassPrivateProperty, |
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AST_ClassProperty, |
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AST_ConciseMethod, |
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AST_PrivateGetter, |
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AST_PrivateMethod, |
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AST_PrivateSetter, |
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AST_Conditional, |
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AST_Const, |
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AST_Continue, |
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AST_Debugger, |
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AST_Default, |
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AST_DefaultAssign, |
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AST_DefClass, |
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AST_Definitions, |
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AST_Defun, |
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AST_Destructuring, |
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AST_Directive, |
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AST_Do, |
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AST_Dot, |
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AST_DotHash, |
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AST_EmptyStatement, |
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AST_Expansion, |
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AST_Export, |
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AST_False, |
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AST_Finally, |
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AST_For, |
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AST_ForIn, |
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AST_ForOf, |
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AST_Function, |
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AST_Hole, |
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AST_If, |
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AST_Import, |
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AST_ImportMeta, |
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AST_IterationStatement, |
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AST_Label, |
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AST_LabeledStatement, |
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AST_LabelRef, |
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AST_Let, |
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AST_NameMapping, |
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AST_New, |
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AST_NewTarget, |
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AST_Node, |
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AST_Null, |
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AST_Number, |
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AST_Object, |
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AST_ObjectGetter, |
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AST_ObjectKeyVal, |
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AST_ObjectProperty, |
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AST_ObjectSetter, |
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AST_PrefixedTemplateString, |
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AST_PropAccess, |
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AST_RegExp, |
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AST_Return, |
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AST_Sequence, |
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AST_SimpleStatement, |
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AST_String, |
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AST_Sub, |
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AST_Super, |
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AST_Switch, |
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AST_SymbolCatch, |
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AST_SymbolClass, |
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AST_SymbolClassProperty, |
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AST_SymbolConst, |
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AST_SymbolDeclaration, |
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AST_SymbolDefClass, |
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AST_SymbolDefun, |
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AST_SymbolExport, |
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AST_SymbolExportForeign, |
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AST_SymbolFunarg, |
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AST_SymbolImport, |
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AST_SymbolImportForeign, |
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AST_SymbolLambda, |
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AST_SymbolLet, |
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AST_SymbolMethod, |
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AST_SymbolRef, |
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AST_SymbolVar, |
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AST_TemplateSegment, |
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AST_TemplateString, |
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AST_This, |
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AST_Throw, |
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AST_Token, |
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AST_Toplevel, |
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AST_True, |
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AST_Try, |
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AST_UnaryPostfix, |
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AST_UnaryPrefix, |
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AST_Var, |
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AST_VarDef, |
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AST_While, |
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AST_With, |
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AST_Yield, |
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_INLINE, |
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_NOINLINE, |
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_PURE |
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} from "./ast.js"; |
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var LATEST_RAW = ""; // Only used for numbers and template strings |
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var LATEST_TEMPLATE_END = true; |
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var KEYWORDS = "break case catch class const continue debugger default delete do else export extends finally for function if in instanceof let new return switch throw try typeof var void while with"; |
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var KEYWORDS_ATOM = "false null true"; |
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var RESERVED_WORDS = "enum import super this " + KEYWORDS_ATOM + " " + KEYWORDS; |
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var ALL_RESERVED_WORDS = "implements interface package private protected public static " + RESERVED_WORDS; |
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var KEYWORDS_BEFORE_EXPRESSION = "return new delete throw else case yield await"; |
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KEYWORDS = makePredicate(KEYWORDS); |
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RESERVED_WORDS = makePredicate(RESERVED_WORDS); |
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KEYWORDS_BEFORE_EXPRESSION = makePredicate(KEYWORDS_BEFORE_EXPRESSION); |
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KEYWORDS_ATOM = makePredicate(KEYWORDS_ATOM); |
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ALL_RESERVED_WORDS = makePredicate(ALL_RESERVED_WORDS); |
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var OPERATOR_CHARS = makePredicate(characters("+-*&%=<>!?|~^")); |
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var RE_NUM_LITERAL = /[0-9a-f]/i; |
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var RE_HEX_NUMBER = /^0x[0-9a-f]+$/i; |
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var RE_OCT_NUMBER = /^0[0-7]+$/; |
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var RE_ES6_OCT_NUMBER = /^0o[0-7]+$/i; |
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var RE_BIN_NUMBER = /^0b[01]+$/i; |
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var RE_DEC_NUMBER = /^\d*\.?\d*(?:e[+-]?\d*(?:\d\.?|\.?\d)\d*)?$/i; |
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var RE_BIG_INT = /^(0[xob])?[0-9a-f]+n$/i; |
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var OPERATORS = makePredicate([ |
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"in", |
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"instanceof", |
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"typeof", |
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"new", |
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"void", |
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"delete", |
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"++", |
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"--", |
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"+", |
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"-", |
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"!", |
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"~", |
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"&", |
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"|", |
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"^", |
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"*", |
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"**", |
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"/", |
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"%", |
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">>", |
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"<<", |
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">>>", |
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"<", |
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">", |
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"<=", |
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">=", |
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"==", |
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"===", |
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"!=", |
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"!==", |
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"?", |
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"=", |
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"+=", |
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"-=", |
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"||=", |
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"&&=", |
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"??=", |
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"/=", |
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"*=", |
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"**=", |
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"%=", |
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">>=", |
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"<<=", |
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">>>=", |
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"|=", |
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"^=", |
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"&=", |
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"&&", |
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"??", |
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"||", |
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]); |
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var WHITESPACE_CHARS = makePredicate(characters(" \u00a0\n\r\t\f\u000b\u200b\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000\uFEFF")); |
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var NEWLINE_CHARS = makePredicate(characters("\n\r\u2028\u2029")); |
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var PUNC_AFTER_EXPRESSION = makePredicate(characters(";]),:")); |
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var PUNC_BEFORE_EXPRESSION = makePredicate(characters("[{(,;:")); |
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var PUNC_CHARS = makePredicate(characters("[]{}(),;:")); |
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/* -----[ Tokenizer ]----- */ |
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// surrogate safe regexps adapted from https://github.com/mathiasbynens/unicode-8.0.0/tree/89b412d8a71ecca9ed593d9e9fa073ab64acfebe/Binary_Property |
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var UNICODE = { |
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ID_Start: /[$A-Z_a-z\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\u0561-\u0587\u05D0-\u05EA\u05F0-\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\u08A0-\u08B4\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\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\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\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-\u1877\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\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\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-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\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-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDE80-\uDE9C\uDEA0-\uDED0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDF00-\uDF19]|\uD806[\uDCA0-\uDCDF\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50\uDF93-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD83A[\uDC00-\uDCC4]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]/, |
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ID_Continue: /(?:[$0-9A-Z_a-z\xAA\xB5\xB7\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B4\u08E3-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0AF9\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58-\u0C5A\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D5F-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\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\u135D-\u135F\u1369-\u1371\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\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\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\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-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA8FD\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2F\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDCA-\uDDCC\uDDD0-\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE37\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF50\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDDD8-\uDDDD\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9\uDF00-\uDF19\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF])+/, |
|
}; |
|
|
|
function get_full_char(str, pos) { |
|
if (is_surrogate_pair_head(str.charCodeAt(pos))) { |
|
if (is_surrogate_pair_tail(str.charCodeAt(pos + 1))) { |
|
return str.charAt(pos) + str.charAt(pos + 1); |
|
} |
|
} else if (is_surrogate_pair_tail(str.charCodeAt(pos))) { |
|
if (is_surrogate_pair_head(str.charCodeAt(pos - 1))) { |
|
return str.charAt(pos - 1) + str.charAt(pos); |
|
} |
|
} |
|
return str.charAt(pos); |
|
} |
|
|
|
function get_full_char_code(str, pos) { |
|
// https://en.wikipedia.org/wiki/Universal_Character_Set_characters#Surrogates |
|
if (is_surrogate_pair_head(str.charCodeAt(pos))) { |
|
return 0x10000 + (str.charCodeAt(pos) - 0xd800 << 10) + str.charCodeAt(pos + 1) - 0xdc00; |
|
} |
|
return str.charCodeAt(pos); |
|
} |
|
|
|
function get_full_char_length(str) { |
|
var surrogates = 0; |
|
|
|
for (var i = 0; i < str.length; i++) { |
|
if (is_surrogate_pair_head(str.charCodeAt(i)) && is_surrogate_pair_tail(str.charCodeAt(i + 1))) { |
|
surrogates++; |
|
i++; |
|
} |
|
} |
|
|
|
return str.length - surrogates; |
|
} |
|
|
|
function from_char_code(code) { |
|
// Based on https://github.com/mathiasbynens/String.fromCodePoint/blob/master/fromcodepoint.js |
|
if (code > 0xFFFF) { |
|
code -= 0x10000; |
|
return (String.fromCharCode((code >> 10) + 0xD800) + |
|
String.fromCharCode((code % 0x400) + 0xDC00)); |
|
} |
|
return String.fromCharCode(code); |
|
} |
|
|
|
function is_surrogate_pair_head(code) { |
|
return code >= 0xd800 && code <= 0xdbff; |
|
} |
|
|
|
function is_surrogate_pair_tail(code) { |
|
return code >= 0xdc00 && code <= 0xdfff; |
|
} |
|
|
|
function is_digit(code) { |
|
return code >= 48 && code <= 57; |
|
} |
|
|
|
function is_identifier_start(ch) { |
|
return UNICODE.ID_Start.test(ch); |
|
} |
|
|
|
function is_identifier_char(ch) { |
|
return UNICODE.ID_Continue.test(ch); |
|
} |
|
|
|
const BASIC_IDENT = /^[a-z_$][a-z0-9_$]*$/i; |
|
|
|
function is_basic_identifier_string(str) { |
|
return BASIC_IDENT.test(str); |
|
} |
|
|
|
function is_identifier_string(str, allow_surrogates) { |
|
if (BASIC_IDENT.test(str)) { |
|
return true; |
|
} |
|
if (!allow_surrogates && /[\ud800-\udfff]/.test(str)) { |
|
return false; |
|
} |
|
var match = UNICODE.ID_Start.exec(str); |
|
if (!match || match.index !== 0) { |
|
return false; |
|
} |
|
|
|
str = str.slice(match[0].length); |
|
if (!str) { |
|
return true; |
|
} |
|
|
|
match = UNICODE.ID_Continue.exec(str); |
|
return !!match && match[0].length === str.length; |
|
} |
|
|
|
function parse_js_number(num, allow_e = true) { |
|
if (!allow_e && num.includes("e")) { |
|
return NaN; |
|
} |
|
if (RE_HEX_NUMBER.test(num)) { |
|
return parseInt(num.substr(2), 16); |
|
} else if (RE_OCT_NUMBER.test(num)) { |
|
return parseInt(num.substr(1), 8); |
|
} else if (RE_ES6_OCT_NUMBER.test(num)) { |
|
return parseInt(num.substr(2), 8); |
|
} else if (RE_BIN_NUMBER.test(num)) { |
|
return parseInt(num.substr(2), 2); |
|
} else if (RE_DEC_NUMBER.test(num)) { |
|
return parseFloat(num); |
|
} else { |
|
var val = parseFloat(num); |
|
if (val == num) return val; |
|
} |
|
} |
|
|
|
class JS_Parse_Error extends Error { |
|
constructor(message, filename, line, col, pos) { |
|
super(); |
|
|
|
this.name = "SyntaxError"; |
|
this.message = message; |
|
this.filename = filename; |
|
this.line = line; |
|
this.col = col; |
|
this.pos = pos; |
|
} |
|
} |
|
|
|
function js_error(message, filename, line, col, pos) { |
|
throw new JS_Parse_Error(message, filename, line, col, pos); |
|
} |
|
|
|
function is_token(token, type, val) { |
|
return token.type == type && (val == null || token.value == val); |
|
} |
|
|
|
var EX_EOF = {}; |
|
|
|
function tokenizer($TEXT, filename, html5_comments, shebang) { |
|
var S = { |
|
text : $TEXT, |
|
filename : filename, |
|
pos : 0, |
|
tokpos : 0, |
|
line : 1, |
|
tokline : 0, |
|
col : 0, |
|
tokcol : 0, |
|
newline_before : false, |
|
regex_allowed : false, |
|
brace_counter : 0, |
|
template_braces : [], |
|
comments_before : [], |
|
directives : {}, |
|
directive_stack : [] |
|
}; |
|
|
|
function peek() { return get_full_char(S.text, S.pos); } |
|
|
|
// Used because parsing ?. involves a lookahead for a digit |
|
function is_option_chain_op() { |
|
const must_be_dot = S.text.charCodeAt(S.pos + 1) === 46; |
|
if (!must_be_dot) return false; |
|
|
|
const cannot_be_digit = S.text.charCodeAt(S.pos + 2); |
|
return cannot_be_digit < 48 || cannot_be_digit > 57; |
|
} |
|
|
|
function next(signal_eof, in_string) { |
|
var ch = get_full_char(S.text, S.pos++); |
|
if (signal_eof && !ch) |
|
throw EX_EOF; |
|
if (NEWLINE_CHARS.has(ch)) { |
|
S.newline_before = S.newline_before || !in_string; |
|
++S.line; |
|
S.col = 0; |
|
if (ch == "\r" && peek() == "\n") { |
|
// treat a \r\n sequence as a single \n |
|
++S.pos; |
|
ch = "\n"; |
|
} |
|
} else { |
|
if (ch.length > 1) { |
|
++S.pos; |
|
++S.col; |
|
} |
|
++S.col; |
|
} |
|
return ch; |
|
} |
|
|
|
function forward(i) { |
|
while (i--) next(); |
|
} |
|
|
|
function looking_at(str) { |
|
return S.text.substr(S.pos, str.length) == str; |
|
} |
|
|
|
function find_eol() { |
|
var text = S.text; |
|
for (var i = S.pos, n = S.text.length; i < n; ++i) { |
|
var ch = text[i]; |
|
if (NEWLINE_CHARS.has(ch)) |
|
return i; |
|
} |
|
return -1; |
|
} |
|
|
|
function find(what, signal_eof) { |
|
var pos = S.text.indexOf(what, S.pos); |
|
if (signal_eof && pos == -1) throw EX_EOF; |
|
return pos; |
|
} |
|
|
|
function start_token() { |
|
S.tokline = S.line; |
|
S.tokcol = S.col; |
|
S.tokpos = S.pos; |
|
} |
|
|
|
var prev_was_dot = false; |
|
var previous_token = null; |
|
function token(type, value, is_comment) { |
|
S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX.has(value)) || |
|
(type == "keyword" && KEYWORDS_BEFORE_EXPRESSION.has(value)) || |
|
(type == "punc" && PUNC_BEFORE_EXPRESSION.has(value))) || |
|
(type == "arrow"); |
|
if (type == "punc" && (value == "." || value == "?.")) { |
|
prev_was_dot = true; |
|
} else if (!is_comment) { |
|
prev_was_dot = false; |
|
} |
|
const line = S.tokline; |
|
const col = S.tokcol; |
|
const pos = S.tokpos; |
|
const nlb = S.newline_before; |
|
const file = filename; |
|
let comments_before = []; |
|
let comments_after = []; |
|
|
|
if (!is_comment) { |
|
comments_before = S.comments_before; |
|
comments_after = S.comments_before = []; |
|
} |
|
S.newline_before = false; |
|
const tok = new AST_Token(type, value, line, col, pos, nlb, comments_before, comments_after, file); |
|
|
|
if (!is_comment) previous_token = tok; |
|
return tok; |
|
} |
|
|
|
function skip_whitespace() { |
|
while (WHITESPACE_CHARS.has(peek())) |
|
next(); |
|
} |
|
|
|
function read_while(pred) { |
|
var ret = "", ch, i = 0; |
|
while ((ch = peek()) && pred(ch, i++)) |
|
ret += next(); |
|
return ret; |
|
} |
|
|
|
function parse_error(err) { |
|
js_error(err, filename, S.tokline, S.tokcol, S.tokpos); |
|
} |
|
|
|
function read_num(prefix) { |
|
var has_e = false, after_e = false, has_x = false, has_dot = prefix == ".", is_big_int = false, numeric_separator = false; |
|
var num = read_while(function(ch, i) { |
|
if (is_big_int) return false; |
|
|
|
var code = ch.charCodeAt(0); |
|
switch (code) { |
|
case 95: // _ |
|
return (numeric_separator = true); |
|
case 98: case 66: // bB |
|
return (has_x = true); // Can occur in hex sequence, don't return false yet |
|
case 111: case 79: // oO |
|
case 120: case 88: // xX |
|
return has_x ? false : (has_x = true); |
|
case 101: case 69: // eE |
|
return has_x ? true : has_e ? false : (has_e = after_e = true); |
|
case 45: // - |
|
return after_e || (i == 0 && !prefix); |
|
case 43: // + |
|
return after_e; |
|
case (after_e = false, 46): // . |
|
return (!has_dot && !has_x && !has_e) ? (has_dot = true) : false; |
|
} |
|
|
|
if (ch === "n") { |
|
is_big_int = true; |
|
|
|
return true; |
|
} |
|
|
|
return RE_NUM_LITERAL.test(ch); |
|
}); |
|
if (prefix) num = prefix + num; |
|
|
|
LATEST_RAW = num; |
|
|
|
if (RE_OCT_NUMBER.test(num) && next_token.has_directive("use strict")) { |
|
parse_error("Legacy octal literals are not allowed in strict mode"); |
|
} |
|
if (numeric_separator) { |
|
if (num.endsWith("_")) { |
|
parse_error("Numeric separators are not allowed at the end of numeric literals"); |
|
} else if (num.includes("__")) { |
|
parse_error("Only one underscore is allowed as numeric separator"); |
|
} |
|
num = num.replace(/_/g, ""); |
|
} |
|
if (num.endsWith("n")) { |
|
const without_n = num.slice(0, -1); |
|
const allow_e = RE_HEX_NUMBER.test(without_n); |
|
const valid = parse_js_number(without_n, allow_e); |
|
if (!has_dot && RE_BIG_INT.test(num) && !isNaN(valid)) |
|
return token("big_int", without_n); |
|
parse_error("Invalid or unexpected token"); |
|
} |
|
var valid = parse_js_number(num); |
|
if (!isNaN(valid)) { |
|
return token("num", valid); |
|
} else { |
|
parse_error("Invalid syntax: " + num); |
|
} |
|
} |
|
|
|
function is_octal(ch) { |
|
return ch >= "0" && ch <= "7"; |
|
} |
|
|
|
function read_escaped_char(in_string, strict_hex, template_string) { |
|
var ch = next(true, in_string); |
|
switch (ch.charCodeAt(0)) { |
|
case 110 : return "\n"; |
|
case 114 : return "\r"; |
|
case 116 : return "\t"; |
|
case 98 : return "\b"; |
|
case 118 : return "\u000b"; // \v |
|
case 102 : return "\f"; |
|
case 120 : return String.fromCharCode(hex_bytes(2, strict_hex)); // \x |
|
case 117 : // \u |
|
if (peek() == "{") { |
|
next(true); |
|
if (peek() === "}") |
|
parse_error("Expecting hex-character between {}"); |
|
while (peek() == "0") next(true); // No significance |
|
var result, length = find("}", true) - S.pos; |
|
// Avoid 32 bit integer overflow (1 << 32 === 1) |
|
// We know first character isn't 0 and thus out of range anyway |
|
if (length > 6 || (result = hex_bytes(length, strict_hex)) > 0x10FFFF) { |
|
parse_error("Unicode reference out of bounds"); |
|
} |
|
next(true); |
|
return from_char_code(result); |
|
} |
|
return String.fromCharCode(hex_bytes(4, strict_hex)); |
|
case 10 : return ""; // newline |
|
case 13 : // \r |
|
if (peek() == "\n") { // DOS newline |
|
next(true, in_string); |
|
return ""; |
|
} |
|
} |
|
if (is_octal(ch)) { |
|
if (template_string && strict_hex) { |
|
const represents_null_character = ch === "0" && !is_octal(peek()); |
|
if (!represents_null_character) { |
|
parse_error("Octal escape sequences are not allowed in template strings"); |
|
} |
|
} |
|
return read_octal_escape_sequence(ch, strict_hex); |
|
} |
|
return ch; |
|
} |
|
|
|
function read_octal_escape_sequence(ch, strict_octal) { |
|
// Read |
|
var p = peek(); |
|
if (p >= "0" && p <= "7") { |
|
ch += next(true); |
|
if (ch[0] <= "3" && (p = peek()) >= "0" && p <= "7") |
|
ch += next(true); |
|
} |
|
|
|
// Parse |
|
if (ch === "0") return "\0"; |
|
if (ch.length > 0 && next_token.has_directive("use strict") && strict_octal) |
|
parse_error("Legacy octal escape sequences are not allowed in strict mode"); |
|
return String.fromCharCode(parseInt(ch, 8)); |
|
} |
|
|
|
function hex_bytes(n, strict_hex) { |
|
var num = 0; |
|
for (; n > 0; --n) { |
|
if (!strict_hex && isNaN(parseInt(peek(), 16))) { |
|
return parseInt(num, 16) || ""; |
|
} |
|
var digit = next(true); |
|
if (isNaN(parseInt(digit, 16))) |
|
parse_error("Invalid hex-character pattern in string"); |
|
num += digit; |
|
} |
|
return parseInt(num, 16); |
|
} |
|
|
|
var read_string = with_eof_error("Unterminated string constant", function() { |
|
const start_pos = S.pos; |
|
var quote = next(), ret = []; |
|
for (;;) { |
|
var ch = next(true, true); |
|
if (ch == "\\") ch = read_escaped_char(true, true); |
|
else if (ch == "\r" || ch == "\n") parse_error("Unterminated string constant"); |
|
else if (ch == quote) break; |
|
ret.push(ch); |
|
} |
|
var tok = token("string", ret.join("")); |
|
LATEST_RAW = S.text.slice(start_pos, S.pos); |
|
tok.quote = quote; |
|
return tok; |
|
}); |
|
|
|
var read_template_characters = with_eof_error("Unterminated template", function(begin) { |
|
if (begin) { |
|
S.template_braces.push(S.brace_counter); |
|
} |
|
var content = "", raw = "", ch, tok; |
|
next(true, true); |
|
while ((ch = next(true, true)) != "`") { |
|
if (ch == "\r") { |
|
if (peek() == "\n") ++S.pos; |
|
ch = "\n"; |
|
} else if (ch == "$" && peek() == "{") { |
|
next(true, true); |
|
S.brace_counter++; |
|
tok = token(begin ? "template_head" : "template_substitution", content); |
|
LATEST_RAW = raw; |
|
LATEST_TEMPLATE_END = false; |
|
return tok; |
|
} |
|
|
|
raw += ch; |
|
if (ch == "\\") { |
|
var tmp = S.pos; |
|
var prev_is_tag = previous_token && (previous_token.type === "name" || previous_token.type === "punc" && (previous_token.value === ")" || previous_token.value === "]")); |
|
ch = read_escaped_char(true, !prev_is_tag, true); |
|
raw += S.text.substr(tmp, S.pos - tmp); |
|
} |
|
|
|
content += ch; |
|
} |
|
S.template_braces.pop(); |
|
tok = token(begin ? "template_head" : "template_substitution", content); |
|
LATEST_RAW = raw; |
|
LATEST_TEMPLATE_END = true; |
|
return tok; |
|
}); |
|
|
|
function skip_line_comment(type) { |
|
var regex_allowed = S.regex_allowed; |
|
var i = find_eol(), ret; |
|
if (i == -1) { |
|
ret = S.text.substr(S.pos); |
|
S.pos = S.text.length; |
|
} else { |
|
ret = S.text.substring(S.pos, i); |
|
S.pos = i; |
|
} |
|
S.col = S.tokcol + (S.pos - S.tokpos); |
|
S.comments_before.push(token(type, ret, true)); |
|
S.regex_allowed = regex_allowed; |
|
return next_token; |
|
} |
|
|
|
var skip_multiline_comment = with_eof_error("Unterminated multiline comment", function() { |
|
var regex_allowed = S.regex_allowed; |
|
var i = find("*/", true); |
|
var text = S.text.substring(S.pos, i).replace(/\r\n|\r|\u2028|\u2029/g, "\n"); |
|
// update stream position |
|
forward(get_full_char_length(text) /* text length doesn't count \r\n as 2 char while S.pos - i does */ + 2); |
|
S.comments_before.push(token("comment2", text, true)); |
|
S.newline_before = S.newline_before || text.includes("\n"); |
|
S.regex_allowed = regex_allowed; |
|
return next_token; |
|
}); |
|
|
|
var read_name = with_eof_error("Unterminated identifier name", function() { |
|
var name = [], ch, escaped = false; |
|
var read_escaped_identifier_char = function() { |
|
escaped = true; |
|
next(); |
|
if (peek() !== "u") { |
|
parse_error("Expecting UnicodeEscapeSequence -- uXXXX or u{XXXX}"); |
|
} |
|
return read_escaped_char(false, true); |
|
}; |
|
|
|
// Read first character (ID_Start) |
|
if ((ch = peek()) === "\\") { |
|
ch = read_escaped_identifier_char(); |
|
if (!is_identifier_start(ch)) { |
|
parse_error("First identifier char is an invalid identifier char"); |
|
} |
|
} else if (is_identifier_start(ch)) { |
|
next(); |
|
} else { |
|
return ""; |
|
} |
|
|
|
name.push(ch); |
|
|
|
// Read ID_Continue |
|
while ((ch = peek()) != null) { |
|
if ((ch = peek()) === "\\") { |
|
ch = read_escaped_identifier_char(); |
|
if (!is_identifier_char(ch)) { |
|
parse_error("Invalid escaped identifier char"); |
|
} |
|
} else { |
|
if (!is_identifier_char(ch)) { |
|
break; |
|
} |
|
next(); |
|
} |
|
name.push(ch); |
|
} |
|
const name_str = name.join(""); |
|
if (RESERVED_WORDS.has(name_str) && escaped) { |
|
parse_error("Escaped characters are not allowed in keywords"); |
|
} |
|
return name_str; |
|
}); |
|
|
|
var read_regexp = with_eof_error("Unterminated regular expression", function(source) { |
|
var prev_backslash = false, ch, in_class = false; |
|
while ((ch = next(true))) if (NEWLINE_CHARS.has(ch)) { |
|
parse_error("Unexpected line terminator"); |
|
} else if (prev_backslash) { |
|
source += "\\" + ch; |
|
prev_backslash = false; |
|
} else if (ch == "[") { |
|
in_class = true; |
|
source += ch; |
|
} else if (ch == "]" && in_class) { |
|
in_class = false; |
|
source += ch; |
|
} else if (ch == "/" && !in_class) { |
|
break; |
|
} else if (ch == "\\") { |
|
prev_backslash = true; |
|
} else { |
|
source += ch; |
|
} |
|
const flags = read_name(); |
|
return token("regexp", "/" + source + "/" + flags); |
|
}); |
|
|
|
function read_operator(prefix) { |
|
function grow(op) { |
|
if (!peek()) return op; |
|
var bigger = op + peek(); |
|
if (OPERATORS.has(bigger)) { |
|
next(); |
|
return grow(bigger); |
|
} else { |
|
return op; |
|
} |
|
} |
|
return token("operator", grow(prefix || next())); |
|
} |
|
|
|
function handle_slash() { |
|
next(); |
|
switch (peek()) { |
|
case "/": |
|
next(); |
|
return skip_line_comment("comment1"); |
|
case "*": |
|
next(); |
|
return skip_multiline_comment(); |
|
} |
|
return S.regex_allowed ? read_regexp("") : read_operator("/"); |
|
} |
|
|
|
function handle_eq_sign() { |
|
next(); |
|
if (peek() === ">") { |
|
next(); |
|
return token("arrow", "=>"); |
|
} else { |
|
return read_operator("="); |
|
} |
|
} |
|
|
|
function handle_dot() { |
|
next(); |
|
if (is_digit(peek().charCodeAt(0))) { |
|
return read_num("."); |
|
} |
|
if (peek() === ".") { |
|
next(); // Consume second dot |
|
next(); // Consume third dot |
|
return token("expand", "..."); |
|
} |
|
|
|
return token("punc", "."); |
|
} |
|
|
|
function read_word() { |
|
var word = read_name(); |
|
if (prev_was_dot) return token("name", word); |
|
return KEYWORDS_ATOM.has(word) ? token("atom", word) |
|
: !KEYWORDS.has(word) ? token("name", word) |
|
: OPERATORS.has(word) ? token("operator", word) |
|
: token("keyword", word); |
|
} |
|
|
|
function read_private_word() { |
|
next(); |
|
return token("privatename", read_name()); |
|
} |
|
|
|
function with_eof_error(eof_error, cont) { |
|
return function(x) { |
|
try { |
|
return cont(x); |
|
} catch(ex) { |
|
if (ex === EX_EOF) parse_error(eof_error); |
|
else throw ex; |
|
} |
|
}; |
|
} |
|
|
|
function next_token(force_regexp) { |
|
if (force_regexp != null) |
|
return read_regexp(force_regexp); |
|
if (shebang && S.pos == 0 && looking_at("#!")) { |
|
start_token(); |
|
forward(2); |
|
skip_line_comment("comment5"); |
|
} |
|
for (;;) { |
|
skip_whitespace(); |
|
start_token(); |
|
if (html5_comments) { |
|
if (looking_at("<!--")) { |
|
forward(4); |
|
skip_line_comment("comment3"); |
|
continue; |
|
} |
|
if (looking_at("-->") && S.newline_before) { |
|
forward(3); |
|
skip_line_comment("comment4"); |
|
continue; |
|
} |
|
} |
|
var ch = peek(); |
|
if (!ch) return token("eof"); |
|
var code = ch.charCodeAt(0); |
|
switch (code) { |
|
case 34: case 39: return read_string(); |
|
case 46: return handle_dot(); |
|
case 47: { |
|
var tok = handle_slash(); |
|
if (tok === next_token) continue; |
|
return tok; |
|
} |
|
case 61: return handle_eq_sign(); |
|
case 63: { |
|
if (!is_option_chain_op()) break; // Handled below |
|
|
|
next(); // ? |
|
next(); // . |
|
|
|
return token("punc", "?."); |
|
} |
|
case 96: return read_template_characters(true); |
|
case 123: |
|
S.brace_counter++; |
|
break; |
|
case 125: |
|
S.brace_counter--; |
|
if (S.template_braces.length > 0 |
|
&& S.template_braces[S.template_braces.length - 1] === S.brace_counter) |
|
return read_template_characters(false); |
|
break; |
|
} |
|
if (is_digit(code)) return read_num(); |
|
if (PUNC_CHARS.has(ch)) return token("punc", next()); |
|
if (OPERATOR_CHARS.has(ch)) return read_operator(); |
|
if (code == 92 || is_identifier_start(ch)) return read_word(); |
|
if (code == 35) return read_private_word(); |
|
break; |
|
} |
|
parse_error("Unexpected character '" + ch + "'"); |
|
} |
|
|
|
next_token.next = next; |
|
next_token.peek = peek; |
|
|
|
next_token.context = function(nc) { |
|
if (nc) S = nc; |
|
return S; |
|
}; |
|
|
|
next_token.add_directive = function(directive) { |
|
S.directive_stack[S.directive_stack.length - 1].push(directive); |
|
|
|
if (S.directives[directive] === undefined) { |
|
S.directives[directive] = 1; |
|
} else { |
|
S.directives[directive]++; |
|
} |
|
}; |
|
|
|
next_token.push_directives_stack = function() { |
|
S.directive_stack.push([]); |
|
}; |
|
|
|
next_token.pop_directives_stack = function() { |
|
var directives = S.directive_stack[S.directive_stack.length - 1]; |
|
|
|
for (var i = 0; i < directives.length; i++) { |
|
S.directives[directives[i]]--; |
|
} |
|
|
|
S.directive_stack.pop(); |
|
}; |
|
|
|
next_token.has_directive = function(directive) { |
|
return S.directives[directive] > 0; |
|
}; |
|
|
|
return next_token; |
|
|
|
} |
|
|
|
/* -----[ Parser (constants) ]----- */ |
|
|
|
var UNARY_PREFIX = makePredicate([ |
|
"typeof", |
|
"void", |
|
"delete", |
|
"--", |
|
"++", |
|
"!", |
|
"~", |
|
"-", |
|
"+" |
|
]); |
|
|
|
var UNARY_POSTFIX = makePredicate([ "--", "++" ]); |
|
|
|
var ASSIGNMENT = makePredicate([ "=", "+=", "-=", "??=", "&&=", "||=", "/=", "*=", "**=", "%=", ">>=", "<<=", ">>>=", "|=", "^=", "&=" ]); |
|
|
|
var LOGICAL_ASSIGNMENT = makePredicate([ "??=", "&&=", "||=" ]); |
|
|
|
var PRECEDENCE = (function(a, ret) { |
|
for (var i = 0; i < a.length; ++i) { |
|
var b = a[i]; |
|
for (var j = 0; j < b.length; ++j) { |
|
ret[b[j]] = i + 1; |
|
} |
|
} |
|
return ret; |
|
})( |
|
[ |
|
["||"], |
|
["??"], |
|
["&&"], |
|
["|"], |
|
["^"], |
|
["&"], |
|
["==", "===", "!=", "!=="], |
|
["<", ">", "<=", ">=", "in", "instanceof"], |
|
[">>", "<<", ">>>"], |
|
["+", "-"], |
|
["*", "/", "%"], |
|
["**"] |
|
], |
|
{} |
|
); |
|
|
|
var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "big_int", "string", "regexp", "name" ]); |
|
|
|
/* -----[ Parser ]----- */ |
|
|
|
function parse($TEXT, options) { |
|
// maps start tokens to count of comments found outside of their parens |
|
// Example: /* I count */ ( /* I don't */ foo() ) |
|
// Useful because comments_before property of call with parens outside |
|
// contains both comments inside and outside these parens. Used to find the |
|
// right #__PURE__ comments for an expression |
|
const outer_comments_before_counts = new WeakMap(); |
|
|
|
options = defaults(options, { |
|
bare_returns : false, |
|
ecma : null, // Legacy |
|
expression : false, |
|
filename : null, |
|
html5_comments : true, |
|
module : false, |
|
shebang : true, |
|
strict : false, |
|
toplevel : null, |
|
}, true); |
|
|
|
var S = { |
|
input : (typeof $TEXT == "string" |
|
? tokenizer($TEXT, options.filename, |
|
options.html5_comments, options.shebang) |
|
: $TEXT), |
|
token : null, |
|
prev : null, |
|
peeked : null, |
|
in_function : 0, |
|
in_async : -1, |
|
in_generator : -1, |
|
in_directives : true, |
|
in_loop : 0, |
|
labels : [] |
|
}; |
|
|
|
S.token = next(); |
|
|
|
function is(type, value) { |
|
return is_token(S.token, type, value); |
|
} |
|
|
|
function peek() { return S.peeked || (S.peeked = S.input()); } |
|
|
|
function next() { |
|
S.prev = S.token; |
|
|
|
if (!S.peeked) peek(); |
|
S.token = S.peeked; |
|
S.peeked = null; |
|
S.in_directives = S.in_directives && ( |
|
S.token.type == "string" || is("punc", ";") |
|
); |
|
return S.token; |
|
} |
|
|
|
function prev() { |
|
return S.prev; |
|
} |
|
|
|
function croak(msg, line, col, pos) { |
|
var ctx = S.input.context(); |
|
js_error(msg, |
|
ctx.filename, |
|
line != null ? line : ctx.tokline, |
|
col != null ? col : ctx.tokcol, |
|
pos != null ? pos : ctx.tokpos); |
|
} |
|
|
|
function token_error(token, msg) { |
|
croak(msg, token.line, token.col); |
|
} |
|
|
|
function unexpected(token) { |
|
if (token == null) |
|
token = S.token; |
|
token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")"); |
|
} |
|
|
|
function expect_token(type, val) { |
|
if (is(type, val)) { |
|
return next(); |
|
} |
|
token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»"); |
|
} |
|
|
|
function expect(punc) { return expect_token("punc", punc); } |
|
|
|
function has_newline_before(token) { |
|
return token.nlb || !token.comments_before.every((comment) => !comment.nlb); |
|
} |
|
|
|
function can_insert_semicolon() { |
|
return !options.strict |
|
&& (is("eof") || is("punc", "}") || has_newline_before(S.token)); |
|
} |
|
|
|
function is_in_generator() { |
|
return S.in_generator === S.in_function; |
|
} |
|
|
|
function is_in_async() { |
|
return S.in_async === S.in_function; |
|
} |
|
|
|
function can_await() { |
|
return ( |
|
S.in_async === S.in_function |
|
|| S.in_function === 0 && S.input.has_directive("use strict") |
|
); |
|
} |
|
|
|
function semicolon(optional) { |
|
if (is("punc", ";")) next(); |
|
else if (!optional && !can_insert_semicolon()) unexpected(); |
|
} |
|
|
|
function parenthesised() { |
|
expect("("); |
|
var exp = expression(true); |
|
expect(")"); |
|
return exp; |
|
} |
|
|
|
function embed_tokens(parser) { |
|
return function _embed_tokens_wrapper(...args) { |
|
const start = S.token; |
|
const expr = parser(...args); |
|
expr.start = start; |
|
expr.end = prev(); |
|
return expr; |
|
}; |
|
} |
|
|
|
function handle_regexp() { |
|
if (is("operator", "/") || is("operator", "/=")) { |
|
S.peeked = null; |
|
S.token = S.input(S.token.value.substr(1)); // force regexp |
|
} |
|
} |
|
|
|
var statement = embed_tokens(function statement(is_export_default, is_for_body, is_if_body) { |
|
handle_regexp(); |
|
switch (S.token.type) { |
|
case "string": |
|
if (S.in_directives) { |
|
var token = peek(); |
|
if (!LATEST_RAW.includes("\\") |
|
&& (is_token(token, "punc", ";") |
|
|| is_token(token, "punc", "}") |
|
|| has_newline_before(token) |
|
|| is_token(token, "eof"))) { |
|
S.input.add_directive(S.token.value); |
|
} else { |
|
S.in_directives = false; |
|
} |
|
} |
|
var dir = S.in_directives, stat = simple_statement(); |
|
return dir && stat.body instanceof AST_String ? new AST_Directive(stat.body) : stat; |
|
case "template_head": |
|
case "num": |
|
case "big_int": |
|
case "regexp": |
|
case "operator": |
|
case "atom": |
|
return simple_statement(); |
|
|
|
case "name": |
|
if (S.token.value == "async" && is_token(peek(), "keyword", "function")) { |
|
next(); |
|
next(); |
|
if (is_for_body) { |
|
croak("functions are not allowed as the body of a loop"); |
|
} |
|
return function_(AST_Defun, false, true, is_export_default); |
|
} |
|
if (S.token.value == "import" && !is_token(peek(), "punc", "(") && !is_token(peek(), "punc", ".")) { |
|
next(); |
|
var node = import_statement(); |
|
semicolon(); |
|
return node; |
|
} |
|
return is_token(peek(), "punc", ":") |
|
? labeled_statement() |
|
: simple_statement(); |
|
|
|
case "punc": |
|
switch (S.token.value) { |
|
case "{": |
|
return new AST_BlockStatement({ |
|
start : S.token, |
|
body : block_(), |
|
end : prev() |
|
}); |
|
case "[": |
|
case "(": |
|
return simple_statement(); |
|
case ";": |
|
S.in_directives = false; |
|
next(); |
|
return new AST_EmptyStatement(); |
|
default: |
|
unexpected(); |
|
} |
|
|
|
case "keyword": |
|
switch (S.token.value) { |
|
case "break": |
|
next(); |
|
return break_cont(AST_Break); |
|
|
|
case "continue": |
|
next(); |
|
return break_cont(AST_Continue); |
|
|
|
case "debugger": |
|
next(); |
|
semicolon(); |
|
return new AST_Debugger(); |
|
|
|
case "do": |
|
next(); |
|
var body = in_loop(statement); |
|
expect_token("keyword", "while"); |
|
var condition = parenthesised(); |
|
semicolon(true); |
|
return new AST_Do({ |
|
body : body, |
|
condition : condition |
|
}); |
|
|
|
case "while": |
|
next(); |
|
return new AST_While({ |
|
condition : parenthesised(), |
|
body : in_loop(function() { return statement(false, true); }) |
|
}); |
|
|
|
case "for": |
|
next(); |
|
return for_(); |
|
|
|
case "class": |
|
next(); |
|
if (is_for_body) { |
|
croak("classes are not allowed as the body of a loop"); |
|
} |
|
if (is_if_body) { |
|
croak("classes are not allowed as the body of an if"); |
|
} |
|
return class_(AST_DefClass, is_export_default); |
|
|
|
case "function": |
|
next(); |
|
if (is_for_body) { |
|
croak("functions are not allowed as the body of a loop"); |
|
} |
|
return function_(AST_Defun, false, false, is_export_default); |
|
|
|
case "if": |
|
next(); |
|
return if_(); |
|
|
|
case "return": |
|
if (S.in_function == 0 && !options.bare_returns) |
|
croak("'return' outside of function"); |
|
next(); |
|
var value = null; |
|
if (is("punc", ";")) { |
|
next(); |
|
} else if (!can_insert_semicolon()) { |
|
value = expression(true); |
|
semicolon(); |
|
} |
|
return new AST_Return({ |
|
value: value |
|
}); |
|
|
|
case "switch": |
|
next(); |
|
return new AST_Switch({ |
|
expression : parenthesised(), |
|
body : in_loop(switch_body_) |
|
}); |
|
|
|
case "throw": |
|
next(); |
|
if (has_newline_before(S.token)) |
|
croak("Illegal newline after 'throw'"); |
|
var value = expression(true); |
|
semicolon(); |
|
return new AST_Throw({ |
|
value: value |
|
}); |
|
|
|
case "try": |
|
next(); |
|
return try_(); |
|
|
|
case "var": |
|
next(); |
|
var node = var_(); |
|
semicolon(); |
|
return node; |
|
|
|
case "let": |
|
next(); |
|
var node = let_(); |
|
semicolon(); |
|
return node; |
|
|
|
case "const": |
|
next(); |
|
var node = const_(); |
|
semicolon(); |
|
return node; |
|
|
|
case "with": |
|
if (S.input.has_directive("use strict")) { |
|
croak("Strict mode may not include a with statement"); |
|
} |
|
next(); |
|
return new AST_With({ |
|
expression : parenthesised(), |
|
body : statement() |
|
}); |
|
|
|
case "export": |
|
if (!is_token(peek(), "punc", "(")) { |
|
next(); |
|
var node = export_statement(); |
|
if (is("punc", ";")) semicolon(); |
|
return node; |
|
} |
|
} |
|
} |
|
unexpected(); |
|
}); |
|
|
|
function labeled_statement() { |
|
var label = as_symbol(AST_Label); |
|
if (label.name === "await" && is_in_async()) { |
|
token_error(S.prev, "await cannot be used as label inside async function"); |
|
} |
|
if (S.labels.some((l) => l.name === label.name)) { |
|
// ECMA-262, 12.12: An ECMAScript program is considered |
|
// syntactically incorrect if it contains a |
|
// LabelledStatement that is enclosed by a |
|
// LabelledStatement with the same Identifier as label. |
|
croak("Label " + label.name + " defined twice"); |
|
} |
|
expect(":"); |
|
S.labels.push(label); |
|
var stat = statement(); |
|
S.labels.pop(); |
|
if (!(stat instanceof AST_IterationStatement)) { |
|
// check for `continue` that refers to this label. |
|
// those should be reported as syntax errors. |
|
// https://github.com/mishoo/UglifyJS2/issues/287 |
|
label.references.forEach(function(ref) { |
|
if (ref instanceof AST_Continue) { |
|
ref = ref.label.start; |
|
croak("Continue label `" + label.name + "` refers to non-IterationStatement.", |
|
ref.line, ref.col, ref.pos); |
|
} |
|
}); |
|
} |
|
return new AST_LabeledStatement({ body: stat, label: label }); |
|
} |
|
|
|
function simple_statement(tmp) { |
|
return new AST_SimpleStatement({ body: (tmp = expression(true), semicolon(), tmp) }); |
|
} |
|
|
|
function break_cont(type) { |
|
var label = null, ldef; |
|
if (!can_insert_semicolon()) { |
|
label = as_symbol(AST_LabelRef, true); |
|
} |
|
if (label != null) { |
|
ldef = S.labels.find((l) => l.name === label.name); |
|
if (!ldef) |
|
croak("Undefined label " + label.name); |
|
label.thedef = ldef; |
|
} else if (S.in_loop == 0) |
|
croak(type.TYPE + " not inside a loop or switch"); |
|
semicolon(); |
|
var stat = new type({ label: label }); |
|
if (ldef) ldef.references.push(stat); |
|
return stat; |
|
} |
|
|
|
function for_() { |
|
var for_await_error = "`for await` invalid in this context"; |
|
var await_tok = S.token; |
|
if (await_tok.type == "name" && await_tok.value == "await") { |
|
if (!can_await()) { |
|
token_error(await_tok, for_await_error); |
|
} |
|
next(); |
|
} else { |
|
await_tok = false; |
|
} |
|
expect("("); |
|
var init = null; |
|
if (!is("punc", ";")) { |
|
init = |
|
is("keyword", "var") ? (next(), var_(true)) : |
|
is("keyword", "let") ? (next(), let_(true)) : |
|
is("keyword", "const") ? (next(), const_(true)) : |
|
expression(true, true); |
|
var is_in = is("operator", "in"); |
|
var is_of = is("name", "of"); |
|
if (await_tok && !is_of) { |
|
token_error(await_tok, for_await_error); |
|
} |
|
if (is_in || is_of) { |
|
if (init instanceof AST_Definitions) { |
|
if (init.definitions.length > 1) |
|
token_error(init.start, "Only one variable declaration allowed in for..in loop"); |
|
} else if (!(is_assignable(init) || (init = to_destructuring(init)) instanceof AST_Destructuring)) { |
|
token_error(init.start, "Invalid left-hand side in for..in loop"); |
|
} |
|
next(); |
|
if (is_in) { |
|
return for_in(init); |
|
} else { |
|
return for_of(init, !!await_tok); |
|
} |
|
} |
|
} else if (await_tok) { |
|
token_error(await_tok, for_await_error); |
|
} |
|
return regular_for(init); |
|
} |
|
|
|
function regular_for(init) { |
|
expect(";"); |
|
var test = is("punc", ";") ? null : expression(true); |
|
expect(";"); |
|
var step = is("punc", ")") ? null : expression(true); |
|
expect(")"); |
|
return new AST_For({ |
|
init : init, |
|
condition : test, |
|
step : step, |
|
body : in_loop(function() { return statement(false, true); }) |
|
}); |
|
} |
|
|
|
function for_of(init, is_await) { |
|
var lhs = init instanceof AST_Definitions ? init.definitions[0].name : null; |
|
var obj = expression(true); |
|
expect(")"); |
|
return new AST_ForOf({ |
|
await : is_await, |
|
init : init, |
|
name : lhs, |
|
object : obj, |
|
body : in_loop(function() { return statement(false, true); }) |
|
}); |
|
} |
|
|
|
function for_in(init) { |
|
var obj = expression(true); |
|
expect(")"); |
|
return new AST_ForIn({ |
|
init : init, |
|
object : obj, |
|
body : in_loop(function() { return statement(false, true); }) |
|
}); |
|
} |
|
|
|
var arrow_function = function(start, argnames, is_async) { |
|
if (has_newline_before(S.token)) { |
|
croak("Unexpected newline before arrow (=>)"); |
|
} |
|
|
|
expect_token("arrow", "=>"); |
|
|
|
var body = _function_body(is("punc", "{"), false, is_async); |
|
|
|
var end = |
|
body instanceof Array && body.length ? body[body.length - 1].end : |
|
body instanceof Array ? start : |
|
body.end; |
|
|
|
return new AST_Arrow({ |
|
start : start, |
|
end : end, |
|
async : is_async, |
|
argnames : argnames, |
|
body : body |
|
}); |
|
}; |
|
|
|
var function_ = function(ctor, is_generator_property, is_async, is_export_default) { |
|
var in_statement = ctor === AST_Defun; |
|
var is_generator = is("operator", "*"); |
|
if (is_generator) { |
|
next(); |
|
} |
|
|
|
var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null; |
|
if (in_statement && !name) { |
|
if (is_export_default) { |
|
ctor = AST_Function; |
|
} else { |
|
unexpected(); |
|
} |
|
} |
|
|
|
if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration)) |
|
unexpected(prev()); |
|
|
|
var args = []; |
|
var body = _function_body(true, is_generator || is_generator_property, is_async, name, args); |
|
return new ctor({ |
|
start : args.start, |
|
end : body.end, |
|
is_generator: is_generator, |
|
async : is_async, |
|
name : name, |
|
argnames: args, |
|
body : body |
|
}); |
|
}; |
|
|
|
function track_used_binding_identifiers(is_parameter, strict) { |
|
var parameters = new Set(); |
|
var duplicate = false; |
|
var default_assignment = false; |
|
var spread = false; |
|
var strict_mode = !!strict; |
|
var tracker = { |
|
add_parameter: function(token) { |
|
if (parameters.has(token.value)) { |
|
if (duplicate === false) { |
|
duplicate = token; |
|
} |
|
tracker.check_strict(); |
|
} else { |
|
parameters.add(token.value); |
|
if (is_parameter) { |
|
switch (token.value) { |
|
case "arguments": |
|
case "eval": |
|
case "yield": |
|
if (strict_mode) { |
|
token_error(token, "Unexpected " + token.value + " identifier as parameter inside strict mode"); |
|
} |
|
break; |
|
default: |
|
if (RESERVED_WORDS.has(token.value)) { |
|
unexpected(); |
|
} |
|
} |
|
} |
|
} |
|
}, |
|
mark_default_assignment: function(token) { |
|
if (default_assignment === false) { |
|
default_assignment = token; |
|
} |
|
}, |
|
mark_spread: function(token) { |
|
if (spread === false) { |
|
spread = token; |
|
} |
|
}, |
|
mark_strict_mode: function() { |
|
strict_mode = true; |
|
}, |
|
is_strict: function() { |
|
return default_assignment !== false || spread !== false || strict_mode; |
|
}, |
|
check_strict: function() { |
|
if (tracker.is_strict() && duplicate !== false) { |
|
token_error(duplicate, "Parameter " + duplicate.value + " was used already"); |
|
} |
|
} |
|
}; |
|
|
|
return tracker; |
|
} |
|
|
|
function parameters(params) { |
|
var used_parameters = track_used_binding_identifiers(true, S.input.has_directive("use strict")); |
|
|
|
expect("("); |
|
|
|
while (!is("punc", ")")) { |
|
var param = parameter(used_parameters); |
|
params.push(param); |
|
|
|
if (!is("punc", ")")) { |
|
expect(","); |
|
} |
|
|
|
if (param instanceof AST_Expansion) { |
|
break; |
|
} |
|
} |
|
|
|
next(); |
|
} |
|
|
|
function parameter(used_parameters, symbol_type) { |
|
var param; |
|
var expand = false; |
|
if (used_parameters === undefined) { |
|
used_parameters = track_used_binding_identifiers(true, S.input.has_directive("use strict")); |
|
} |
|
if (is("expand", "...")) { |
|
expand = S.token; |
|
used_parameters.mark_spread(S.token); |
|
next(); |
|
} |
|
param = binding_element(used_parameters, symbol_type); |
|
|
|
if (is("operator", "=") && expand === false) { |
|
used_parameters.mark_default_assignment(S.token); |
|
next(); |
|
param = new AST_DefaultAssign({ |
|
start: param.start, |
|
left: param, |
|
operator: "=", |
|
right: expression(false), |
|
end: S.token |
|
}); |
|
} |
|
|
|
if (expand !== false) { |
|
if (!is("punc", ")")) { |
|
unexpected(); |
|
} |
|
param = new AST_Expansion({ |
|
start: expand, |
|
expression: param, |
|
end: expand |
|
}); |
|
} |
|
used_parameters.check_strict(); |
|
|
|
return param; |
|
} |
|
|
|
function binding_element(used_parameters, symbol_type) { |
|
var elements = []; |
|
var first = true; |
|
var is_expand = false; |
|
var expand_token; |
|
var first_token = S.token; |
|
if (used_parameters === undefined) { |
|
used_parameters = track_used_binding_identifiers(false, S.input.has_directive("use strict")); |
|
} |
|
symbol_type = symbol_type === undefined ? AST_SymbolFunarg : symbol_type; |
|
if (is("punc", "[")) { |
|
next(); |
|
while (!is("punc", "]")) { |
|
if (first) { |
|
first = false; |
|
} else { |
|
expect(","); |
|
} |
|
|
|
if (is("expand", "...")) { |
|
is_expand = true; |
|
expand_token = S.token; |
|
used_parameters.mark_spread(S.token); |
|
next(); |
|
} |
|
if (is("punc")) { |
|
switch (S.token.value) { |
|
case ",": |
|
elements.push(new AST_Hole({ |
|
start: S.token, |
|
end: S.token |
|
})); |
|
continue; |
|
case "]": // Trailing comma after last element |
|
break; |
|
case "[": |
|
case "{": |
|
elements.push(binding_element(used_parameters, symbol_type)); |
|
break; |
|
default: |
|
unexpected(); |
|
} |
|
} else if (is("name")) { |
|
used_parameters.add_parameter(S.token); |
|
elements.push(as_symbol(symbol_type)); |
|
} else { |
|
croak("Invalid function parameter"); |
|
} |
|
if (is("operator", "=") && is_expand === false) { |
|
used_parameters.mark_default_assignment(S.token); |
|
next(); |
|
elements[elements.length - 1] = new AST_DefaultAssign({ |
|
start: elements[elements.length - 1].start, |
|
left: elements[elements.length - 1], |
|
operator: "=", |
|
right: expression(false), |
|
end: S.token |
|
}); |
|
} |
|
if (is_expand) { |
|
if (!is("punc", "]")) { |
|
croak("Rest element must be last element"); |
|
} |
|
elements[elements.length - 1] = new AST_Expansion({ |
|
start: expand_token, |
|
expression: elements[elements.length - 1], |
|
end: expand_token |
|
}); |
|
} |
|
} |
|
expect("]"); |
|
used_parameters.check_strict(); |
|
return new AST_Destructuring({ |
|
start: first_token, |
|
names: elements, |
|
is_array: true, |
|
end: prev() |
|
}); |
|
} else if (is("punc", "{")) { |
|
next(); |
|
while (!is("punc", "}")) { |
|
if (first) { |
|
first = false; |
|
} else { |
|
expect(","); |
|
} |
|
if (is("expand", "...")) { |
|
is_expand = true; |
|
expand_token = S.token; |
|
used_parameters.mark_spread(S.token); |
|
next(); |
|
} |
|
if (is("name") && (is_token(peek(), "punc") || is_token(peek(), "operator")) && [",", "}", "="].includes(peek().value)) { |
|
used_parameters.add_parameter(S.token); |
|
var start = prev(); |
|
var value = as_symbol(symbol_type); |
|
if (is_expand) { |
|
elements.push(new AST_Expansion({ |
|
start: expand_token, |
|
expression: value, |
|
end: value.end, |
|
})); |
|
} else { |
|
elements.push(new AST_ObjectKeyVal({ |
|
start: start, |
|
key: value.name, |
|
value: value, |
|
end: value.end, |
|
})); |
|
} |
|
} else if (is("punc", "}")) { |
|
continue; // Allow trailing hole |
|
} else { |
|
var property_token = S.token; |
|
var property = as_property_name(); |
|
if (property === null) { |
|
unexpected(prev()); |
|
} else if (prev().type === "name" && !is("punc", ":")) { |
|
elements.push(new AST_ObjectKeyVal({ |
|
start: prev(), |
|
key: property, |
|
value: new symbol_type({ |
|
start: prev(), |
|
name: property, |
|
end: prev() |
|
}), |
|
end: prev() |
|
})); |
|
} else { |
|
expect(":"); |
|
elements.push(new AST_ObjectKeyVal({ |
|
start: property_token, |
|
quote: property_token.quote, |
|
key: property, |
|
value: binding_element(used_parameters, symbol_type), |
|
end: prev() |
|
})); |
|
} |
|
} |
|
if (is_expand) { |
|
if (!is("punc", "}")) { |
|
croak("Rest element must be last element"); |
|
} |
|
} else if (is("operator", "=")) { |
|
used_parameters.mark_default_assignment(S.token); |
|
next(); |
|
elements[elements.length - 1].value = new AST_DefaultAssign({ |
|
start: elements[elements.length - 1].value.start, |
|
left: elements[elements.length - 1].value, |
|
operator: "=", |
|
right: expression(false), |
|
end: S.token |
|
}); |
|
} |
|
} |
|
expect("}"); |
|
used_parameters.check_strict(); |
|
return new AST_Destructuring({ |
|
start: first_token, |
|
names: elements, |
|
is_array: false, |
|
end: prev() |
|
}); |
|
} else if (is("name")) { |
|
used_parameters.add_parameter(S.token); |
|
return as_symbol(symbol_type); |
|
} else { |
|
croak("Invalid function parameter"); |
|
} |
|
} |
|
|
|
function params_or_seq_(allow_arrows, maybe_sequence) { |
|
var spread_token; |
|
var invalid_sequence; |
|
var trailing_comma; |
|
var a = []; |
|
expect("("); |
|
while (!is("punc", ")")) { |
|
if (spread_token) unexpected(spread_token); |
|
if (is("expand", "...")) { |
|
spread_token = S.token; |
|
if (maybe_sequence) invalid_sequence = S.token; |
|
next(); |
|
a.push(new AST_Expansion({ |
|
start: prev(), |
|
expression: expression(), |
|
end: S.token, |
|
})); |
|
} else { |
|
a.push(expression()); |
|
} |
|
if (!is("punc", ")")) { |
|
expect(","); |
|
if (is("punc", ")")) { |
|
trailing_comma = prev(); |
|
if (maybe_sequence) invalid_sequence = trailing_comma; |
|
} |
|
} |
|
} |
|
expect(")"); |
|
if (allow_arrows && is("arrow", "=>")) { |
|
if (spread_token && trailing_comma) unexpected(trailing_comma); |
|
} else if (invalid_sequence) { |
|
unexpected(invalid_sequence); |
|
} |
|
return a; |
|
} |
|
|
|
function _function_body(block, generator, is_async, name, args) { |
|
var loop = S.in_loop; |
|
var labels = S.labels; |
|
var current_generator = S.in_generator; |
|
var current_async = S.in_async; |
|
++S.in_function; |
|
if (generator) |
|
S.in_generator = S.in_function; |
|
if (is_async) |
|
S.in_async = S.in_function; |
|
if (args) parameters(args); |
|
if (block) |
|
S.in_directives = true; |
|
S.in_loop = 0; |
|
S.labels = []; |
|
if (block) { |
|
S.input.push_directives_stack(); |
|
var a = block_(); |
|
if (name) _verify_symbol(name); |
|
if (args) args.forEach(_verify_symbol); |
|
S.input.pop_directives_stack(); |
|
} else { |
|
var a = [new AST_Return({ |
|
start: S.token, |
|
value: expression(false), |
|
end: S.token |
|
})]; |
|
} |
|
--S.in_function; |
|
S.in_loop = loop; |
|
S.labels = labels; |
|
S.in_generator = current_generator; |
|
S.in_async = current_async; |
|
return a; |
|
} |
|
|
|
function _await_expression() { |
|
// Previous token must be "await" and not be interpreted as an identifier |
|
if (!can_await()) { |
|
croak("Unexpected await expression outside async function", |
|
S.prev.line, S.prev.col, S.prev.pos); |
|
} |
|
// the await expression is parsed as a unary expression in Babel |
|
return new AST_Await({ |
|
start: prev(), |
|
end: S.token, |
|
expression : maybe_unary(true), |
|
}); |
|
} |
|
|
|
function _yield_expression() { |
|
// Previous token must be keyword yield and not be interpret as an identifier |
|
if (!is_in_generator()) { |
|
croak("Unexpected yield expression outside generator function", |
|
S.prev.line, S.prev.col, S.prev.pos); |
|
} |
|
var start = S.token; |
|
var star = false; |
|
var has_expression = true; |
|
|
|
// Attempt to get expression or star (and then the mandatory expression) |
|
// behind yield on the same line. |
|
// |
|
// If nothing follows on the same line of the yieldExpression, |
|
// it should default to the value `undefined` for yield to return. |
|
// In that case, the `undefined` stored as `null` in ast. |
|
// |
|
// Note 1: It isn't allowed for yield* to close without an expression |
|
// Note 2: If there is a nlb between yield and star, it is interpret as |
|
// yield <explicit undefined> <inserted automatic semicolon> * |
|
if (can_insert_semicolon() || |
|
(is("punc") && PUNC_AFTER_EXPRESSION.has(S.token.value))) { |
|
has_expression = false; |
|
|
|
} else if (is("operator", "*")) { |
|
star = true; |
|
next(); |
|
} |
|
|
|
return new AST_Yield({ |
|
start : start, |
|
is_star : star, |
|
expression : has_expression ? expression() : null, |
|
end : prev() |
|
}); |
|
} |
|
|
|
function if_() { |
|
var cond = parenthesised(), body = statement(false, false, true), belse = null; |
|
if (is("keyword", "else")) { |
|
next(); |
|
belse = statement(false, false, true); |
|
} |
|
return new AST_If({ |
|
condition : cond, |
|
body : body, |
|
alternative : belse |
|
}); |
|
} |
|
|
|
function block_() { |
|
expect("{"); |
|
var a = []; |
|
while (!is("punc", "}")) { |
|
if (is("eof")) unexpected(); |
|
a.push(statement()); |
|
} |
|
next(); |
|
return a; |
|
} |
|
|
|
function switch_body_() { |
|
expect("{"); |
|
var a = [], cur = null, branch = null, tmp; |
|
while (!is("punc", "}")) { |
|
if (is("eof")) unexpected(); |
|
if (is("keyword", "case")) { |
|
if (branch) branch.end = prev(); |
|
cur = []; |
|
branch = new AST_Case({ |
|
start : (tmp = S.token, next(), tmp), |
|
expression : expression(true), |
|
body : cur |
|
}); |
|
a.push(branch); |
|
expect(":"); |
|
} else if (is("keyword", "default")) { |
|
if (branch) branch.end = prev(); |
|
cur = []; |
|
branch = new AST_Default({ |
|
start : (tmp = S.token, next(), expect(":"), tmp), |
|
body : cur |
|
}); |
|
a.push(branch); |
|
} else { |
|
if (!cur) unexpected(); |
|
cur.push(statement()); |
|
} |
|
} |
|
if (branch) branch.end = prev(); |
|
next(); |
|
return a; |
|
} |
|
|
|
function try_() { |
|
var body = block_(), bcatch = null, bfinally = null; |
|
if (is("keyword", "catch")) { |
|
var start = S.token; |
|
next(); |
|
if (is("punc", "{")) { |
|
var name = null; |
|
} else { |
|
expect("("); |
|
var name = parameter(undefined, AST_SymbolCatch); |
|
expect(")"); |
|
} |
|
bcatch = new AST_Catch({ |
|
start : start, |
|
argname : name, |
|
body : block_(), |
|
end : prev() |
|
}); |
|
} |
|
if (is("keyword", "finally")) { |
|
var start = S.token; |
|
next(); |
|
bfinally = new AST_Finally({ |
|
start : start, |
|
body : block_(), |
|
end : prev() |
|
}); |
|
} |
|
if (!bcatch && !bfinally) |
|
croak("Missing catch/finally blocks"); |
|
return new AST_Try({ |
|
body : body, |
|
bcatch : bcatch, |
|
bfinally : bfinally |
|
}); |
|
} |
|
|
|
function vardefs(no_in, kind) { |
|
var a = []; |
|
var def; |
|
for (;;) { |
|
var sym_type = |
|
kind === "var" ? AST_SymbolVar : |
|
kind === "const" ? AST_SymbolConst : |
|
kind === "let" ? AST_SymbolLet : null; |
|
if (is("punc", "{") || is("punc", "[")) { |
|
def = new AST_VarDef({ |
|
start: S.token, |
|
name: binding_element(undefined ,sym_type), |
|
value: is("operator", "=") ? (expect_token("operator", "="), expression(false, no_in)) : null, |
|
end: prev() |
|
}); |
|
} else { |
|
def = new AST_VarDef({ |
|
start : S.token, |
|
name : as_symbol(sym_type), |
|
value : is("operator", "=") |
|
? (next(), expression(false, no_in)) |
|
: !no_in && kind === "const" |
|
? croak("Missing initializer in const declaration") : null, |
|
end : prev() |
|
}); |
|
if (def.name.name == "import") croak("Unexpected token: import"); |
|
} |
|
a.push(def); |
|
if (!is("punc", ",")) |
|
break; |
|
next(); |
|
} |
|
return a; |
|
} |
|
|
|
var var_ = function(no_in) { |
|
return new AST_Var({ |
|
start : prev(), |
|
definitions : vardefs(no_in, "var"), |
|
end : prev() |
|
}); |
|
}; |
|
|
|
var let_ = function(no_in) { |
|
return new AST_Let({ |
|
start : prev(), |
|
definitions : vardefs(no_in, "let"), |
|
end : prev() |
|
}); |
|
}; |
|
|
|
var const_ = function(no_in) { |
|
return new AST_Const({ |
|
start : prev(), |
|
definitions : vardefs(no_in, "const"), |
|
end : prev() |
|
}); |
|
}; |
|
|
|
var new_ = function(allow_calls) { |
|
var start = S.token; |
|
expect_token("operator", "new"); |
|
if (is("punc", ".")) { |
|
next(); |
|
expect_token("name", "target"); |
|
return subscripts(new AST_NewTarget({ |
|
start : start, |
|
end : prev() |
|
}), allow_calls); |
|
} |
|
var newexp = expr_atom(false), args; |
|
if (is("punc", "(")) { |
|
next(); |
|
args = expr_list(")", true); |
|
} else { |
|
args = []; |
|
} |
|
var call = new AST_New({ |
|
start : start, |
|
expression : newexp, |
|
args : args, |
|
end : prev() |
|
}); |
|
annotate(call); |
|
return subscripts(call, allow_calls); |
|
}; |
|
|
|
function as_atom_node() { |
|
var tok = S.token, ret; |
|
switch (tok.type) { |
|
case "name": |
|
ret = _make_symbol(AST_SymbolRef); |
|
break; |
|
case "num": |
|
ret = new AST_Number({ |
|
start: tok, |
|
end: tok, |
|
value: tok.value, |
|
raw: LATEST_RAW |
|
}); |
|
break; |
|
case "big_int": |
|
ret = new AST_BigInt({ start: tok, end: tok, value: tok.value }); |
|
break; |
|
case "string": |
|
ret = new AST_String({ |
|
start : tok, |
|
end : tok, |
|
value : tok.value, |
|
quote : tok.quote |
|
}); |
|
break; |
|
case "regexp": |
|
const [_, source, flags] = tok.value.match(/^\/(.*)\/(\w*)$/); |
|
|
|
ret = new AST_RegExp({ start: tok, end: tok, value: { source, flags } }); |
|
break; |
|
case "atom": |
|
switch (tok.value) { |
|
case "false": |
|
ret = new AST_False({ start: tok, end: tok }); |
|
break; |
|
case "true": |
|
ret = new AST_True({ start: tok, end: tok }); |
|
break; |
|
case "null": |
|
ret = new AST_Null({ start: tok, end: tok }); |
|
break; |
|
} |
|
break; |
|
} |
|
next(); |
|
return ret; |
|
} |
|
|
|
function to_fun_args(ex, default_seen_above) { |
|
var insert_default = function(ex, default_value) { |
|
if (default_value) { |
|
return new AST_DefaultAssign({ |
|
start: ex.start, |
|
left: ex, |
|
operator: "=", |
|
right: default_value, |
|
end: default_value.end |
|
}); |
|
} |
|
return ex; |
|
}; |
|
if (ex instanceof AST_Object) { |
|
return insert_default(new AST_Destructuring({ |
|
start: ex.start, |
|
end: ex.end, |
|
is_array: false, |
|
names: ex.properties.map(prop => to_fun_args(prop)) |
|
}), default_seen_above); |
|
} else if (ex instanceof AST_ObjectKeyVal) { |
|
ex.value = to_fun_args(ex.value); |
|
return insert_default(ex, default_seen_above); |
|
} else if (ex instanceof AST_Hole) { |
|
return ex; |
|
} else if (ex instanceof AST_Destructuring) { |
|
ex.names = ex.names.map(name => to_fun_args(name)); |
|
return insert_default(ex, default_seen_above); |
|
} else if (ex instanceof AST_SymbolRef) { |
|
return insert_default(new AST_SymbolFunarg({ |
|
name: ex.name, |
|
start: ex.start, |
|
end: ex.end |
|
}), default_seen_above); |
|
} else if (ex instanceof AST_Expansion) { |
|
ex.expression = to_fun_args(ex.expression); |
|
return insert_default(ex, default_seen_above); |
|
} else if (ex instanceof AST_Array) { |
|
return insert_default(new AST_Destructuring({ |
|
start: ex.start, |
|
end: ex.end, |
|
is_array: true, |
|
names: ex.elements.map(elm => to_fun_args(elm)) |
|
}), default_seen_above); |
|
} else if (ex instanceof AST_Assign) { |
|
return insert_default(to_fun_args(ex.left, ex.right), default_seen_above); |
|
} else if (ex instanceof AST_DefaultAssign) { |
|
ex.left = to_fun_args(ex.left); |
|
return ex; |
|
} else { |
|
croak("Invalid function parameter", ex.start.line, ex.start.col); |
|
} |
|
} |
|
|
|
var expr_atom = function(allow_calls, allow_arrows) { |
|
if (is("operator", "new")) { |
|
return new_(allow_calls); |
|
} |
|
if (is("operator", "import")) { |
|
return import_meta(); |
|
} |
|
var start = S.token; |
|
var peeked; |
|
var async = is("name", "async") |
|
&& (peeked = peek()).value != "[" |
|
&& peeked.type != "arrow" |
|
&& as_atom_node(); |
|
if (is("punc")) { |
|
switch (S.token.value) { |
|
case "(": |
|
if (async && !allow_calls) break; |
|
var exprs = params_or_seq_(allow_arrows, !async); |
|
if (allow_arrows && is("arrow", "=>")) { |
|
return arrow_function(start, exprs.map(e => to_fun_args(e)), !!async); |
|
} |
|
var ex = async ? new AST_Call({ |
|
expression: async, |
|
args: exprs |
|
}) : exprs.length == 1 ? exprs[0] : new AST_Sequence({ |
|
expressions: exprs |
|
}); |
|
if (ex.start) { |
|
const outer_comments_before = start.comments_before.length; |
|
outer_comments_before_counts.set(start, outer_comments_before); |
|
ex.start.comments_before.unshift(...start.comments_before); |
|
start.comments_before = ex.start.comments_before; |
|
if (outer_comments_before == 0 && start.comments_before.length > 0) { |
|
var comment = start.comments_before[0]; |
|
if (!comment.nlb) { |
|
comment.nlb = start.nlb; |
|
start.nlb = false; |
|
} |
|
} |
|
start.comments_after = ex.start.comments_after; |
|
} |
|
ex.start = start; |
|
var end = prev(); |
|
if (ex.end) { |
|
end.comments_before = ex.end.comments_before; |
|
ex.end.comments_after.push(...end.comments_after); |
|
end.comments_after = ex.end.comments_after; |
|
} |
|
ex.end = end; |
|
if (ex instanceof AST_Call) annotate(ex); |
|
return subscripts(ex, allow_calls); |
|
case "[": |
|
return subscripts(array_(), allow_calls); |
|
case "{": |
|
return subscripts(object_or_destructuring_(), allow_calls); |
|
} |
|
if (!async) unexpected(); |
|
} |
|
if (allow_arrows && is("name") && is_token(peek(), "arrow")) { |
|
var param = new AST_SymbolFunarg({ |
|
name: S.token.value, |
|
start: start, |
|
end: start, |
|
}); |
|
next(); |
|
return arrow_function(start, [param], !!async); |
|
} |
|
if (is("keyword", "function")) { |
|
next(); |
|
var func = function_(AST_Function, false, !!async); |
|
func.start = start; |
|
func.end = prev(); |
|
return subscripts(func, allow_calls); |
|
} |
|
if (async) return subscripts(async, allow_calls); |
|
if (is("keyword", "class")) { |
|
next(); |
|
var cls = class_(AST_ClassExpression); |
|
cls.start = start; |
|
cls.end = prev(); |
|
return subscripts(cls, allow_calls); |
|
} |
|
if (is("template_head")) { |
|
return subscripts(template_string(), allow_calls); |
|
} |
|
if (ATOMIC_START_TOKEN.has(S.token.type)) { |
|
return subscripts(as_atom_node(), allow_calls); |
|
} |
|
unexpected(); |
|
}; |
|
|
|
function template_string() { |
|
var segments = [], start = S.token; |
|
|
|
segments.push(new AST_TemplateSegment({ |
|
start: S.token, |
|
raw: LATEST_RAW, |
|
value: S.token.value, |
|
end: S.token |
|
})); |
|
|
|
while (!LATEST_TEMPLATE_END) { |
|
next(); |
|
handle_regexp(); |
|
segments.push(expression(true)); |
|
|
|
segments.push(new AST_TemplateSegment({ |
|
start: S.token, |
|
raw: LATEST_RAW, |
|
value: S.token.value, |
|
end: S.token |
|
})); |
|
} |
|
next(); |
|
|
|
return new AST_TemplateString({ |
|
start: start, |
|
segments: segments, |
|
end: S.token |
|
}); |
|
} |
|
|
|
function expr_list(closing, allow_trailing_comma, allow_empty) { |
|
var first = true, a = []; |
|
while (!is("punc", closing)) { |
|
if (first) first = false; else expect(","); |
|
if (allow_trailing_comma && is("punc", closing)) break; |
|
if (is("punc", ",") && allow_empty) { |
|
a.push(new AST_Hole({ start: S.token, end: S.token })); |
|
} else if (is("expand", "...")) { |
|
next(); |
|
a.push(new AST_Expansion({start: prev(), expression: expression(),end: S.token})); |
|
} else { |
|
a.push(expression(false)); |
|
} |
|
} |
|
next(); |
|
return a; |
|
} |
|
|
|
var array_ = embed_tokens(function() { |
|
expect("["); |
|
return new AST_Array({ |
|
elements: expr_list("]", !options.strict, true) |
|
}); |
|
}); |
|
|
|
var create_accessor = embed_tokens((is_generator, is_async) => { |
|
return function_(AST_Accessor, is_generator, is_async); |
|
}); |
|
|
|
var object_or_destructuring_ = embed_tokens(function object_or_destructuring_() { |
|
var start = S.token, first = true, a = []; |
|
expect("{"); |
|
while (!is("punc", "}")) { |
|
if (first) first = false; else expect(","); |
|
if (!options.strict && is("punc", "}")) |
|
// allow trailing comma |
|
break; |
|
|
|
start = S.token; |
|
if (start.type == "expand") { |
|
next(); |
|
a.push(new AST_Expansion({ |
|
start: start, |
|
expression: expression(false), |
|
end: prev(), |
|
})); |
|
continue; |
|
} |
|
|
|
var name = as_property_name(); |
|
var value; |
|
|
|
// Check property and fetch value |
|
if (!is("punc", ":")) { |
|
var concise = concise_method_or_getset(name, start); |
|
if (concise) { |
|
a.push(concise); |
|
continue; |
|
} |
|
|
|
value = new AST_SymbolRef({ |
|
start: prev(), |
|
name: name, |
|
end: prev() |
|
}); |
|
} else if (name === null) { |
|
unexpected(prev()); |
|
} else { |
|
next(); // `:` - see first condition |
|
value = expression(false); |
|
} |
|
|
|
// Check for default value and alter value accordingly if necessary |
|
if (is("operator", "=")) { |
|
next(); |
|
value = new AST_Assign({ |
|
start: start, |
|
left: value, |
|
operator: "=", |
|
right: expression(false), |
|
logical: false, |
|
end: prev() |
|
}); |
|
} |
|
|
|
// Create property |
|
a.push(new AST_ObjectKeyVal({ |
|
start: start, |
|
quote: start.quote, |
|
key: name instanceof AST_Node ? name : "" + name, |
|
value: value, |
|
end: prev() |
|
})); |
|
} |
|
next(); |
|
return new AST_Object({ properties: a }); |
|
}); |
|
|
|
function class_(KindOfClass, is_export_default) { |
|
var start, method, class_name, extends_, a = []; |
|
|
|
S.input.push_directives_stack(); // Push directive stack, but not scope stack |
|
S.input.add_directive("use strict"); |
|
|
|
if (S.token.type == "name" && S.token.value != "extends") { |
|
class_name = as_symbol(KindOfClass === AST_DefClass ? AST_SymbolDefClass : AST_SymbolClass); |
|
} |
|
|
|
if (KindOfClass === AST_DefClass && !class_name) { |
|
if (is_export_default) { |
|
KindOfClass = AST_ClassExpression; |
|
} else { |
|
unexpected(); |
|
} |
|
} |
|
|
|
if (S.token.value == "extends") { |
|
next(); |
|
extends_ = expression(true); |
|
} |
|
|
|
expect("{"); |
|
|
|
while (is("punc", ";")) { next(); } // Leading semicolons are okay in class bodies. |
|
while (!is("punc", "}")) { |
|
start = S.token; |
|
method = concise_method_or_getset(as_property_name(), start, true); |
|
if (!method) { unexpected(); } |
|
a.push(method); |
|
while (is("punc", ";")) { next(); } |
|
} |
|
|
|
S.input.pop_directives_stack(); |
|
|
|
next(); |
|
|
|
return new KindOfClass({ |
|
start: start, |
|
name: class_name, |
|
extends: extends_, |
|
properties: a, |
|
end: prev(), |
|
}); |
|
} |
|
|
|
function concise_method_or_getset(name, start, is_class) { |
|
const get_symbol_ast = (name, SymbolClass = AST_SymbolMethod) => { |
|
if (typeof name === "string" || typeof name === "number") { |
|
return new SymbolClass({ |
|
start, |
|
name: "" + name, |
|
end: prev() |
|
}); |
|
} else if (name === null) { |
|
unexpected(); |
|
} |
|
return name; |
|
}; |
|
|
|
const is_not_method_start = () => |
|
!is("punc", "(") && !is("punc", ",") && !is("punc", "}") && !is("punc", ";") && !is("operator", "="); |
|
|
|
var is_async = false; |
|
var is_static = false; |
|
var is_generator = false; |
|
var is_private = false; |
|
var accessor_type = null; |
|
|
|
if (is_class && name === "static" && is_not_method_start()) { |
|
is_static = true; |
|
name = as_property_name(); |
|
} |
|
if (name === "async" && is_not_method_start()) { |
|
is_async = true; |
|
name = as_property_name(); |
|
} |
|
if (prev().type === "operator" && prev().value === "*") { |
|
is_generator = true; |
|
name = as_property_name(); |
|
} |
|
if ((name === "get" || name === "set") && is_not_method_start()) { |
|
accessor_type = name; |
|
name = as_property_name(); |
|
} |
|
if (prev().type === "privatename") { |
|
is_private = true; |
|
} |
|
|
|
const property_token = prev(); |
|
|
|
if (accessor_type != null) { |
|
if (!is_private) { |
|
const AccessorClass = accessor_type === "get" |
|
? AST_ObjectGetter |
|
: AST_ObjectSetter; |
|
|
|
name = get_symbol_ast(name); |
|
return new AccessorClass({ |
|
start, |
|
static: is_static, |
|
key: name, |
|
quote: name instanceof AST_SymbolMethod ? property_token.quote : undefined, |
|
value: create_accessor(), |
|
end: prev() |
|
}); |
|
} else { |
|
const AccessorClass = accessor_type === "get" |
|
? AST_PrivateGetter |
|
: AST_PrivateSetter; |
|
|
|
return new AccessorClass({ |
|
start, |
|
static: is_static, |
|
key: get_symbol_ast(name), |
|
value: create_accessor(), |
|
end: prev(), |
|
}); |
|
} |
|
} |
|
|
|
if (is("punc", "(")) { |
|
name = get_symbol_ast(name); |
|
const AST_MethodVariant = is_private |
|
? AST_PrivateMethod |
|
: AST_ConciseMethod; |
|
var node = new AST_MethodVariant({ |
|
start : start, |
|
static : is_static, |
|
is_generator: is_generator, |
|
async : is_async, |
|
key : name, |
|
quote : name instanceof AST_SymbolMethod ? |
|
property_token.quote : undefined, |
|
value : create_accessor(is_generator, is_async), |
|
end : prev() |
|
}); |
|
return node; |
|
} |
|
|
|
if (is_class) { |
|
const key = get_symbol_ast(name, AST_SymbolClassProperty); |
|
const quote = key instanceof AST_SymbolClassProperty |
|
? property_token.quote |
|
: undefined; |
|
const AST_ClassPropertyVariant = is_private |
|
? AST_ClassPrivateProperty |
|
: AST_ClassProperty; |
|
if (is("operator", "=")) { |
|
next(); |
|
return new AST_ClassPropertyVariant({ |
|
start, |
|
static: is_static, |
|
quote, |
|
key, |
|
value: expression(false), |
|
end: prev() |
|
}); |
|
} else if ( |
|
is("name") |
|
|| is("privatename") |
|
|| is("operator", "*") |
|
|| is("punc", ";") |
|
|| is("punc", "}") |
|
) { |
|
return new AST_ClassPropertyVariant({ |
|
start, |
|
static: is_static, |
|
quote, |
|
key, |
|
end: prev() |
|
}); |
|
} |
|
} |
|
} |
|
|
|
function maybe_import_assertion() { |
|
if (is("name", "assert") && !has_newline_before(S.token)) { |
|
next(); |
|
return object_or_destructuring_(); |
|
} |
|
return null; |
|
} |
|
|
|
function import_statement() { |
|
var start = prev(); |
|
|
|
var imported_name; |
|
var imported_names; |
|
if (is("name")) { |
|
imported_name = as_symbol(AST_SymbolImport); |
|
} |
|
|
|
if (is("punc", ",")) { |
|
next(); |
|
} |
|
|
|
imported_names = map_names(true); |
|
|
|
if (imported_names || imported_name) { |
|
expect_token("name", "from"); |
|
} |
|
var mod_str = S.token; |
|
if (mod_str.type !== "string") { |
|
unexpected(); |
|
} |
|
next(); |
|
|
|
const assert_clause = maybe_import_assertion(); |
|
|
|
return new AST_Import({ |
|
start, |
|
imported_name, |
|
imported_names, |
|
module_name: new AST_String({ |
|
start: mod_str, |
|
value: mod_str.value, |
|
quote: mod_str.quote, |
|
end: mod_str, |
|
}), |
|
assert_clause, |
|
end: S.token, |
|
}); |
|
} |
|
|
|
function import_meta() { |
|
var start = S.token; |
|
expect_token("operator", "import"); |
|
expect_token("punc", "."); |
|
expect_token("name", "meta"); |
|
return subscripts(new AST_ImportMeta({ |
|
start: start, |
|
end: prev() |
|
}), false); |
|
} |
|
|
|
function map_name(is_import) { |
|
function make_symbol(type) { |
|
return new type({ |
|
name: as_property_name(), |
|
start: prev(), |
|
end: prev() |
|
}); |
|
} |
|
|
|
var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign; |
|
var type = is_import ? AST_SymbolImport : AST_SymbolExport; |
|
var start = S.token; |
|
var foreign_name; |
|
var name; |
|
|
|
if (is_import) { |
|
foreign_name = make_symbol(foreign_type); |
|
} else { |
|
name = make_symbol(type); |
|
} |
|
if (is("name", "as")) { |
|
next(); // The "as" word |
|
if (is_import) { |
|
name = make_symbol(type); |
|
} else { |
|
foreign_name = make_symbol(foreign_type); |
|
} |
|
} else if (is_import) { |
|
name = new type(foreign_name); |
|
} else { |
|
foreign_name = new foreign_type(name); |
|
} |
|
|
|
return new AST_NameMapping({ |
|
start: start, |
|
foreign_name: foreign_name, |
|
name: name, |
|
end: prev(), |
|
}); |
|
} |
|
|
|
function map_nameAsterisk(is_import, name) { |
|
var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign; |
|
var type = is_import ? AST_SymbolImport : AST_SymbolExport; |
|
var start = S.token; |
|
var foreign_name; |
|
var end = prev(); |
|
|
|
name = name || new type({ |
|
name: "*", |
|
start: start, |
|
end: end, |
|
}); |
|
|
|
foreign_name = new foreign_type({ |
|
name: "*", |
|
start: start, |
|
end: end, |
|
}); |
|
|
|
return new AST_NameMapping({ |
|
start: start, |
|
foreign_name: foreign_name, |
|
name: name, |
|
end: end, |
|
}); |
|
} |
|
|
|
function map_names(is_import) { |
|
var names; |
|
if (is("punc", "{")) { |
|
next(); |
|
names = []; |
|
while (!is("punc", "}")) { |
|
names.push(map_name(is_import)); |
|
if (is("punc", ",")) { |
|
next(); |
|
} |
|
} |
|
next(); |
|
} else if (is("operator", "*")) { |
|
var name; |
|
next(); |
|
if (is_import && is("name", "as")) { |
|
next(); // The "as" word |
|
name = as_symbol(is_import ? AST_SymbolImport : AST_SymbolExportForeign); |
|
} |
|
names = [map_nameAsterisk(is_import, name)]; |
|
} |
|
return names; |
|
} |
|
|
|
function export_statement() { |
|
var start = S.token; |
|
var is_default; |
|
var exported_names; |
|
|
|
if (is("keyword", "default")) { |
|
is_default = true; |
|
next(); |
|
} else if (exported_names = map_names(false)) { |
|
if (is("name", "from")) { |
|
next(); |
|
|
|
var mod_str = S.token; |
|
if (mod_str.type !== "string") { |
|
unexpected(); |
|
} |
|
next(); |
|
|
|
const assert_clause = maybe_import_assertion(); |
|
|
|
return new AST_Export({ |
|
start: start, |
|
is_default: is_default, |
|
exported_names: exported_names, |
|
module_name: new AST_String({ |
|
start: mod_str, |
|
value: mod_str.value, |
|
quote: mod_str.quote, |
|
end: mod_str, |
|
}), |
|
end: prev(), |
|
assert_clause |
|
}); |
|
} else { |
|
return new AST_Export({ |
|
start: start, |
|
is_default: is_default, |
|
exported_names: exported_names, |
|
end: prev(), |
|
}); |
|
} |
|
} |
|
|
|
var node; |
|
var exported_value; |
|
var exported_definition; |
|
if (is("punc", "{") |
|
|| is_default |
|
&& (is("keyword", "class") || is("keyword", "function")) |
|
&& is_token(peek(), "punc")) { |
|
exported_value = expression(false); |
|
semicolon(); |
|
} else if ((node = statement(is_default)) instanceof AST_Definitions && is_default) { |
|
unexpected(node.start); |
|
} else if ( |
|
node instanceof AST_Definitions |
|
|| node instanceof AST_Defun |
|
|| node instanceof AST_DefClass |
|
) { |
|
exported_definition = node; |
|
} else if ( |
|
node instanceof AST_ClassExpression |
|
|| node instanceof AST_Function |
|
) { |
|
exported_value = node; |
|
} else if (node instanceof AST_SimpleStatement) { |
|
exported_value = node.body; |
|
} else { |
|
unexpected(node.start); |
|
} |
|
|
|
return new AST_Export({ |
|
start: start, |
|
is_default: is_default, |
|
exported_value: exported_value, |
|
exported_definition: exported_definition, |
|
end: prev(), |
|
assert_clause: null |
|
}); |
|
} |
|
|
|
function as_property_name() { |
|
var tmp = S.token; |
|
switch (tmp.type) { |
|
case "punc": |
|
if (tmp.value === "[") { |
|
next(); |
|
var ex = expression(false); |
|
expect("]"); |
|
return ex; |
|
} else unexpected(tmp); |
|
case "operator": |
|
if (tmp.value === "*") { |
|
next(); |
|
return null; |
|
} |
|
if (!["delete", "in", "instanceof", "new", "typeof", "void"].includes(tmp.value)) { |
|
unexpected(tmp); |
|
} |
|
/* falls through */ |
|
case "name": |
|
case "privatename": |
|
case "string": |
|
case "num": |
|
case "big_int": |
|
case "keyword": |
|
case "atom": |
|
next(); |
|
return tmp.value; |
|
default: |
|
unexpected(tmp); |
|
} |
|
} |
|
|
|
function as_name() { |
|
var tmp = S.token; |
|
if (tmp.type != "name" && tmp.type != "privatename") unexpected(); |
|
next(); |
|
return tmp.value; |
|
} |
|
|
|
function _make_symbol(type) { |
|
var name = S.token.value; |
|
return new (name == "this" ? AST_This : |
|
name == "super" ? AST_Super : |
|
type)({ |
|
name : String(name), |
|
start : S.token, |
|
end : S.token |
|
}); |
|
} |
|
|
|
function _verify_symbol(sym) { |
|
var name = sym.name; |
|
if (is_in_generator() && name == "yield") { |
|
token_error(sym.start, "Yield cannot be used as identifier inside generators"); |
|
} |
|
if (S.input.has_directive("use strict")) { |
|
if (name == "yield") { |
|
token_error(sym.start, "Unexpected yield identifier inside strict mode"); |
|
} |
|
if (sym instanceof AST_SymbolDeclaration && (name == "arguments" || name == "eval")) { |
|
token_error(sym.start, "Unexpected " + name + " in strict mode"); |
|
} |
|
} |
|
} |
|
|
|
function as_symbol(type, noerror) { |
|
if (!is("name")) { |
|
if (!noerror) croak("Name expected"); |
|
return null; |
|
} |
|
var sym = _make_symbol(type); |
|
_verify_symbol(sym); |
|
next(); |
|
return sym; |
|
} |
|
|
|
// Annotate AST_Call, AST_Lambda or AST_New with the special comments |
|
function annotate(node) { |
|
var start = node.start; |
|
var comments = start.comments_before; |
|
const comments_outside_parens = outer_comments_before_counts.get(start); |
|
var i = comments_outside_parens != null ? comments_outside_parens : comments.length; |
|
while (--i >= 0) { |
|
var comment = comments[i]; |
|
if (/[@#]__/.test(comment.value)) { |
|
if (/[@#]__PURE__/.test(comment.value)) { |
|
set_annotation(node, _PURE); |
|
break; |
|
} |
|
if (/[@#]__INLINE__/.test(comment.value)) { |
|
set_annotation(node, _INLINE); |
|
break; |
|
} |
|
if (/[@#]__NOINLINE__/.test(comment.value)) { |
|
set_annotation(node, _NOINLINE); |
|
break; |
|
} |
|
} |
|
} |
|
} |
|
|
|
var subscripts = function(expr, allow_calls, is_chain) { |
|
var start = expr.start; |
|
if (is("punc", ".")) { |
|
next(); |
|
const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot; |
|
return subscripts(new AST_DotVariant({ |
|
start : start, |
|
expression : expr, |
|
optional : false, |
|
property : as_name(), |
|
end : prev() |
|
}), allow_calls, is_chain); |
|
} |
|
if (is("punc", "[")) { |
|
next(); |
|
var prop = expression(true); |
|
expect("]"); |
|
return subscripts(new AST_Sub({ |
|
start : start, |
|
expression : expr, |
|
optional : false, |
|
property : prop, |
|
end : prev() |
|
}), allow_calls, is_chain); |
|
} |
|
if (allow_calls && is("punc", "(")) { |
|
next(); |
|
var call = new AST_Call({ |
|
start : start, |
|
expression : expr, |
|
optional : false, |
|
args : call_args(), |
|
end : prev() |
|
}); |
|
annotate(call); |
|
return subscripts(call, true, is_chain); |
|
} |
|
|
|
if (is("punc", "?.")) { |
|
next(); |
|
|
|
let chain_contents; |
|
|
|
if (allow_calls && is("punc", "(")) { |
|
next(); |
|
|
|
const call = new AST_Call({ |
|
start, |
|
optional: true, |
|
expression: expr, |
|
args: call_args(), |
|
end: prev() |
|
}); |
|
annotate(call); |
|
|
|
chain_contents = subscripts(call, true, true); |
|
} else if (is("name") || is("privatename")) { |
|
const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot; |
|
chain_contents = subscripts(new AST_DotVariant({ |
|
start, |
|
expression: expr, |
|
optional: true, |
|
property: as_name(), |
|
end: prev() |
|
}), allow_calls, true); |
|
} else if (is("punc", "[")) { |
|
next(); |
|
const property = expression(true); |
|
expect("]"); |
|
chain_contents = subscripts(new AST_Sub({ |
|
start, |
|
expression: expr, |
|
optional: true, |
|
property, |
|
end: prev() |
|
}), allow_calls, true); |
|
} |
|
|
|
if (!chain_contents) unexpected(); |
|
|
|
if (chain_contents instanceof AST_Chain) return chain_contents; |
|
|
|
return new AST_Chain({ |
|
start, |
|
expression: chain_contents, |
|
end: prev() |
|
}); |
|
} |
|
|
|
if (is("template_head")) { |
|
if (is_chain) { |
|
// a?.b`c` is a syntax error |
|
unexpected(); |
|
} |
|
|
|
return subscripts(new AST_PrefixedTemplateString({ |
|
start: start, |
|
prefix: expr, |
|
template_string: template_string(), |
|
end: prev() |
|
}), allow_calls); |
|
} |
|
|
|
return expr; |
|
}; |
|
|
|
function call_args() { |
|
var args = []; |
|
while (!is("punc", ")")) { |
|
if (is("expand", "...")) { |
|
next(); |
|
args.push(new AST_Expansion({ |
|
start: prev(), |
|
expression: expression(false), |
|
end: prev() |
|
})); |
|
} else { |
|
args.push(expression(false)); |
|
} |
|
if (!is("punc", ")")) { |
|
expect(","); |
|
} |
|
} |
|
next(); |
|
return args; |
|
} |
|
|
|
var maybe_unary = function(allow_calls, allow_arrows) { |
|
var start = S.token; |
|
if (start.type == "name" && start.value == "await" && can_await()) { |
|
next(); |
|
return _await_expression(); |
|
} |
|
if (is("operator") && UNARY_PREFIX.has(start.value)) { |
|
next(); |
|
handle_regexp(); |
|
var ex = make_unary(AST_UnaryPrefix, start, maybe_unary(allow_calls)); |
|
ex.start = start; |
|
ex.end = prev(); |
|
return ex; |
|
} |
|
var val = expr_atom(allow_calls, allow_arrows); |
|
while (is("operator") && UNARY_POSTFIX.has(S.token.value) && !has_newline_before(S.token)) { |
|
if (val instanceof AST_Arrow) unexpected(); |
|
val = make_unary(AST_UnaryPostfix, S.token, val); |
|
val.start = start; |
|
val.end = S.token; |
|
next(); |
|
} |
|
return val; |
|
}; |
|
|
|
function make_unary(ctor, token, expr) { |
|
var op = token.value; |
|
switch (op) { |
|
case "++": |
|
case "--": |
|
if (!is_assignable(expr)) |
|
croak("Invalid use of " + op + " operator", token.line, token.col, token.pos); |
|
break; |
|
case "delete": |
|
if (expr instanceof AST_SymbolRef && S.input.has_directive("use strict")) |
|
croak("Calling delete on expression not allowed in strict mode", expr.start.line, expr.start.col, expr.start.pos); |
|
break; |
|
} |
|
return new ctor({ operator: op, expression: expr }); |
|
} |
|
|
|
var expr_op = function(left, min_prec, no_in) { |
|
var op = is("operator") ? S.token.value : null; |
|
if (op == "in" && no_in) op = null; |
|
if (op == "**" && left instanceof AST_UnaryPrefix |
|
/* unary token in front not allowed - parenthesis required */ |
|
&& !is_token(left.start, "punc", "(") |
|
&& left.operator !== "--" && left.operator !== "++") |
|
unexpected(left.start); |
|
var prec = op != null ? PRECEDENCE[op] : null; |
|
if (prec != null && (prec > min_prec || (op === "**" && min_prec === prec))) { |
|
next(); |
|
var right = expr_op(maybe_unary(true), prec, no_in); |
|
return expr_op(new AST_Binary({ |
|
start : left.start, |
|
left : left, |
|
operator : op, |
|
right : right, |
|
end : right.end |
|
}), min_prec, no_in); |
|
} |
|
return left; |
|
}; |
|
|
|
function expr_ops(no_in) { |
|
return expr_op(maybe_unary(true, true), 0, no_in); |
|
} |
|
|
|
var maybe_conditional = function(no_in) { |
|
var start = S.token; |
|
var expr = expr_ops(no_in); |
|
if (is("operator", "?")) { |
|
next(); |
|
var yes = expression(false); |
|
expect(":"); |
|
return new AST_Conditional({ |
|
start : start, |
|
condition : expr, |
|
consequent : yes, |
|
alternative : expression(false, no_in), |
|
end : prev() |
|
}); |
|
} |
|
return expr; |
|
}; |
|
|
|
function is_assignable(expr) { |
|
return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef; |
|
} |
|
|
|
function to_destructuring(node) { |
|
if (node instanceof AST_Object) { |
|
node = new AST_Destructuring({ |
|
start: node.start, |
|
names: node.properties.map(to_destructuring), |
|
is_array: false, |
|
end: node.end |
|
}); |
|
} else if (node instanceof AST_Array) { |
|
var names = []; |
|
|
|
for (var i = 0; i < node.elements.length; i++) { |
|
// Only allow expansion as last element |
|
if (node.elements[i] instanceof AST_Expansion) { |
|
if (i + 1 !== node.elements.length) { |
|
token_error(node.elements[i].start, "Spread must the be last element in destructuring array"); |
|
} |
|
node.elements[i].expression = to_destructuring(node.elements[i].expression); |
|
} |
|
|
|
names.push(to_destructuring(node.elements[i])); |
|
} |
|
|
|
node = new AST_Destructuring({ |
|
start: node.start, |
|
names: names, |
|
is_array: true, |
|
end: node.end |
|
}); |
|
} else if (node instanceof AST_ObjectProperty) { |
|
node.value = to_destructuring(node.value); |
|
} else if (node instanceof AST_Assign) { |
|
node = new AST_DefaultAssign({ |
|
start: node.start, |
|
left: node.left, |
|
operator: "=", |
|
right: node.right, |
|
end: node.end |
|
}); |
|
} |
|
return node; |
|
} |
|
|
|
// In ES6, AssignmentExpression can also be an ArrowFunction |
|
var maybe_assign = function(no_in) { |
|
handle_regexp(); |
|
var start = S.token; |
|
|
|
if (start.type == "name" && start.value == "yield") { |
|
if (is_in_generator()) { |
|
next(); |
|
return _yield_expression(); |
|
} else if (S.input.has_directive("use strict")) { |
|
token_error(S.token, "Unexpected yield identifier inside strict mode"); |
|
} |
|
} |
|
|
|
var left = maybe_conditional(no_in); |
|
var val = S.token.value; |
|
|
|
if (is("operator") && ASSIGNMENT.has(val)) { |
|
if (is_assignable(left) || (left = to_destructuring(left)) instanceof AST_Destructuring) { |
|
next(); |
|
|
|
return new AST_Assign({ |
|
start : start, |
|
left : left, |
|
operator : val, |
|
right : maybe_assign(no_in), |
|
logical : LOGICAL_ASSIGNMENT.has(val), |
|
end : prev() |
|
}); |
|
} |
|
croak("Invalid assignment"); |
|
} |
|
return left; |
|
}; |
|
|
|
var expression = function(commas, no_in) { |
|
var start = S.token; |
|
var exprs = []; |
|
while (true) { |
|
exprs.push(maybe_assign(no_in)); |
|
if (!commas || !is("punc", ",")) break; |
|
next(); |
|
commas = true; |
|
} |
|
return exprs.length == 1 ? exprs[0] : new AST_Sequence({ |
|
start : start, |
|
expressions : exprs, |
|
end : peek() |
|
}); |
|
}; |
|
|
|
function in_loop(cont) { |
|
++S.in_loop; |
|
var ret = cont(); |
|
--S.in_loop; |
|
return ret; |
|
} |
|
|
|
if (options.expression) { |
|
return expression(true); |
|
} |
|
|
|
return (function parse_toplevel() { |
|
var start = S.token; |
|
var body = []; |
|
S.input.push_directives_stack(); |
|
if (options.module) S.input.add_directive("use strict"); |
|
while (!is("eof")) { |
|
body.push(statement()); |
|
} |
|
S.input.pop_directives_stack(); |
|
var end = prev(); |
|
var toplevel = options.toplevel; |
|
if (toplevel) { |
|
toplevel.body = toplevel.body.concat(body); |
|
toplevel.end = end; |
|
} else { |
|
toplevel = new AST_Toplevel({ start: start, body: body, end: end }); |
|
} |
|
return toplevel; |
|
})(); |
|
|
|
} |
|
|
|
export { |
|
get_full_char_code, |
|
get_full_char, |
|
is_identifier_char, |
|
is_basic_identifier_string, |
|
is_identifier_string, |
|
is_surrogate_pair_head, |
|
is_surrogate_pair_tail, |
|
js_error, |
|
JS_Parse_Error, |
|
parse, |
|
PRECEDENCE, |
|
ALL_RESERVED_WORDS, |
|
tokenizer, |
|
};
|
|
|