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1187 lines
43 KiB
1187 lines
43 KiB
// regjsparser
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//
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// ==================================================================
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//
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// See ECMA-262 Standard: 15.10.1
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//
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// NOTE: The ECMA-262 standard uses the term "Assertion" for /^/. Here the
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// term "Anchor" is used.
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//
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// Pattern ::
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// Disjunction
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//
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// Disjunction ::
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// Alternative
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// Alternative | Disjunction
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//
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// Alternative ::
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// [empty]
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// Alternative Term
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//
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// Term ::
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// Anchor
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// Atom
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// Atom Quantifier
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//
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// Anchor ::
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// ^
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// $
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// \ b
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// \ B
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// ( ? = Disjunction )
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// ( ? ! Disjunction )
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// ( ? < = Disjunction )
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// ( ? < ! Disjunction )
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//
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// Quantifier ::
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// QuantifierPrefix
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// QuantifierPrefix ?
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//
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// QuantifierPrefix ::
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// *
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// +
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// ?
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// { DecimalDigits }
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// { DecimalDigits , }
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// { DecimalDigits , DecimalDigits }
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//
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// Atom ::
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// PatternCharacter
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// .
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// \ AtomEscape
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// CharacterClass
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// ( GroupSpecifier Disjunction )
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// ( ? : Disjunction )
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//
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// PatternCharacter ::
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// SourceCharacter but not any of: ^ $ \ . * + ? ( ) [ ] { } |
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//
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// AtomEscape ::
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// DecimalEscape
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// CharacterEscape
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// CharacterClassEscape
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// k GroupName
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//
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// CharacterEscape[U] ::
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// ControlEscape
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// c ControlLetter
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// HexEscapeSequence
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// RegExpUnicodeEscapeSequence[?U] (ES6)
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// IdentityEscape[?U]
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//
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// ControlEscape ::
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// one of f n r t v
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// ControlLetter ::
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// one of
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// a b c d e f g h i j k l m n o p q r s t u v w x y z
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// A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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//
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// IdentityEscape ::
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// SourceCharacter but not c
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//
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// DecimalEscape ::
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// DecimalIntegerLiteral [lookahead ∉ DecimalDigit]
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//
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// CharacterClassEscape ::
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// one of d D s S w W
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//
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// CharacterClass ::
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// [ [lookahead ∉ {^}] ClassRanges ]
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// [ ^ ClassRanges ]
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//
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// ClassRanges ::
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// [empty]
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// NonemptyClassRanges
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//
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// NonemptyClassRanges ::
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// ClassAtom
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// ClassAtom NonemptyClassRangesNoDash
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// ClassAtom - ClassAtom ClassRanges
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//
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// NonemptyClassRangesNoDash ::
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// ClassAtom
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// ClassAtomNoDash NonemptyClassRangesNoDash
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// ClassAtomNoDash - ClassAtom ClassRanges
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//
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// ClassAtom ::
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// -
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// ClassAtomNoDash
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//
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// ClassAtomNoDash ::
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// SourceCharacter but not one of \ or ] or -
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// \ ClassEscape
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//
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// ClassEscape ::
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// DecimalEscape
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// b
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// CharacterEscape
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// CharacterClassEscape
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//
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// GroupSpecifier ::
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// [empty]
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// ? GroupName
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//
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// GroupName ::
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// < RegExpIdentifierName >
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//
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// RegExpIdentifierName ::
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// RegExpIdentifierStart
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// RegExpIdentifierName RegExpIdentifierContinue
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//
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// RegExpIdentifierStart ::
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// UnicodeIDStart
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// $
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// _
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// \ RegExpUnicodeEscapeSequence
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//
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// RegExpIdentifierContinue ::
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// UnicodeIDContinue
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// $
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// _
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// \ RegExpUnicodeEscapeSequence
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// <ZWNJ>
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// <ZWJ>
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(function() {
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var fromCodePoint = String.fromCodePoint || (function() {
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// Implementation taken from
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
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var stringFromCharCode = String.fromCharCode;
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var floor = Math.floor;
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return function fromCodePoint() {
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var MAX_SIZE = 0x4000;
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var codeUnits = [];
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var highSurrogate;
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var lowSurrogate;
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var index = -1;
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var length = arguments.length;
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if (!length) {
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return '';
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}
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var result = '';
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while (++index < length) {
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var codePoint = Number(arguments[index]);
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if (
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!isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
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codePoint < 0 || // not a valid Unicode code point
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codePoint > 0x10FFFF || // not a valid Unicode code point
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floor(codePoint) != codePoint // not an integer
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) {
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throw RangeError('Invalid code point: ' + codePoint);
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}
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if (codePoint <= 0xFFFF) { // BMP code point
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codeUnits.push(codePoint);
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} else { // Astral code point; split in surrogate halves
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// http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
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codePoint -= 0x10000;
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highSurrogate = (codePoint >> 10) + 0xD800;
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lowSurrogate = (codePoint % 0x400) + 0xDC00;
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codeUnits.push(highSurrogate, lowSurrogate);
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}
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if (index + 1 == length || codeUnits.length > MAX_SIZE) {
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result += stringFromCharCode.apply(null, codeUnits);
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codeUnits.length = 0;
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}
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}
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return result;
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};
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}());
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function parse(str, flags, features) {
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if (!features) {
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features = {};
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}
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function addRaw(node) {
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node.raw = str.substring(node.range[0], node.range[1]);
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return node;
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}
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function updateRawStart(node, start) {
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node.range[0] = start;
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return addRaw(node);
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}
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function createAnchor(kind, rawLength) {
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return addRaw({
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type: 'anchor',
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kind: kind,
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range: [
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pos - rawLength,
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pos
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]
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});
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}
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function createValue(kind, codePoint, from, to) {
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return addRaw({
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type: 'value',
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kind: kind,
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codePoint: codePoint,
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range: [from, to]
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});
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}
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function createEscaped(kind, codePoint, value, fromOffset) {
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fromOffset = fromOffset || 0;
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return createValue(kind, codePoint, pos - (value.length + fromOffset), pos);
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}
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function createCharacter(matches) {
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var _char = matches[0];
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var first = _char.charCodeAt(0);
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if (hasUnicodeFlag) {
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var second;
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if (_char.length === 1 && first >= 0xD800 && first <= 0xDBFF) {
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second = lookahead().charCodeAt(0);
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if (second >= 0xDC00 && second <= 0xDFFF) {
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// Unicode surrogate pair
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pos++;
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return createValue(
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'symbol',
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(first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000,
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pos - 2, pos);
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}
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}
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}
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return createValue('symbol', first, pos - 1, pos);
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}
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function createDisjunction(alternatives, from, to) {
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return addRaw({
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type: 'disjunction',
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body: alternatives,
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range: [
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from,
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to
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]
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});
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}
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function createDot() {
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return addRaw({
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type: 'dot',
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range: [
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pos - 1,
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pos
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]
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});
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}
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function createCharacterClassEscape(value) {
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return addRaw({
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type: 'characterClassEscape',
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value: value,
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range: [
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pos - 2,
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pos
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]
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});
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}
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function createReference(matchIndex) {
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return addRaw({
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type: 'reference',
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matchIndex: parseInt(matchIndex, 10),
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range: [
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pos - 1 - matchIndex.length,
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pos
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]
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});
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}
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function createNamedReference(name) {
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return addRaw({
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type: 'reference',
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name: name,
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range: [
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name.range[0] - 3,
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pos
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]
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});
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}
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function createGroup(behavior, disjunction, from, to) {
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return addRaw({
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type: 'group',
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behavior: behavior,
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body: disjunction,
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range: [
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from,
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to
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]
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});
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}
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function createQuantifier(min, max, from, to) {
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if (to == null) {
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from = pos - 1;
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to = pos;
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}
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return addRaw({
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type: 'quantifier',
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min: min,
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max: max,
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greedy: true,
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body: null, // set later on
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range: [
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from,
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to
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]
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});
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}
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function createAlternative(terms, from, to) {
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return addRaw({
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type: 'alternative',
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body: terms,
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range: [
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from,
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to
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]
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});
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}
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function createCharacterClass(classRanges, negative, from, to) {
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return addRaw({
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type: 'characterClass',
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body: classRanges,
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negative: negative,
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range: [
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from,
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to
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]
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});
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}
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function createClassRange(min, max, from, to) {
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// See 15.10.2.15:
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if (min.codePoint > max.codePoint) {
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bail('invalid range in character class', min.raw + '-' + max.raw, from, to);
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}
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return addRaw({
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type: 'characterClassRange',
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min: min,
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max: max,
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range: [
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from,
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to
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]
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});
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}
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function flattenBody(body) {
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if (body.type === 'alternative') {
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return body.body;
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} else {
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return [body];
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}
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}
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function isEmpty(obj) {
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return obj.type === 'empty';
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}
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function incr(amount) {
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amount = (amount || 1);
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var res = str.substring(pos, pos + amount);
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pos += (amount || 1);
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return res;
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}
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function skip(value) {
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if (!match(value)) {
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bail('character', value);
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}
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}
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function match(value) {
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if (str.indexOf(value, pos) === pos) {
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return incr(value.length);
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}
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}
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function lookahead() {
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return str[pos];
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}
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function current(value) {
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return str.indexOf(value, pos) === pos;
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}
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function next(value) {
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return str[pos + 1] === value;
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}
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function matchReg(regExp) {
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var subStr = str.substring(pos);
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var res = subStr.match(regExp);
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if (res) {
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res.range = [];
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res.range[0] = pos;
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incr(res[0].length);
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res.range[1] = pos;
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}
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return res;
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}
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function parseDisjunction() {
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// Disjunction ::
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// Alternative
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// Alternative | Disjunction
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var res = [], from = pos;
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res.push(parseAlternative());
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while (match('|')) {
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res.push(parseAlternative());
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}
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if (res.length === 1) {
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return res[0];
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}
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return createDisjunction(res, from, pos);
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}
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function parseAlternative() {
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var res = [], from = pos;
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var term;
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// Alternative ::
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// [empty]
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// Alternative Term
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while (term = parseTerm()) {
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res.push(term);
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}
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if (res.length === 1) {
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return res[0];
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}
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return createAlternative(res, from, pos);
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}
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function parseTerm() {
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// Term ::
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// Anchor
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// Atom
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// Atom Quantifier
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if (pos >= str.length || current('|') || current(')')) {
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return null; /* Means: The term is empty */
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}
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var anchor = parseAnchor();
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if (anchor) {
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return anchor;
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}
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var atom = parseAtomAndExtendedAtom();
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if (!atom) {
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bail('Expected atom');
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}
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var quantifier = parseQuantifier() || false;
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if (quantifier) {
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quantifier.body = flattenBody(atom);
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// The quantifier contains the atom. Therefore, the beginning of the
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// quantifier range is given by the beginning of the atom.
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updateRawStart(quantifier, atom.range[0]);
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return quantifier;
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}
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return atom;
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}
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function parseGroup(matchA, typeA, matchB, typeB) {
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var type = null, from = pos;
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if (match(matchA)) {
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type = typeA;
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} else if (match(matchB)) {
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type = typeB;
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} else {
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return false;
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}
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return finishGroup(type, from);
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}
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function finishGroup(type, from) {
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var body = parseDisjunction();
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if (!body) {
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bail('Expected disjunction');
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}
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skip(')');
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var group = createGroup(type, flattenBody(body), from, pos);
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|
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if (type == 'normal') {
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// Keep track of the number of closed groups. This is required for
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// parseDecimalEscape(). In case the string is parsed a second time the
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// value already holds the total count and no incrementation is required.
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if (firstIteration) {
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closedCaptureCounter++;
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}
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}
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return group;
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}
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|
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function parseAnchor() {
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// Anchor ::
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// ^
|
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// $
|
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// \ b
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// \ B
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// ( ? = Disjunction )
|
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// ( ? ! Disjunction )
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var res, from = pos;
|
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|
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if (match('^')) {
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return createAnchor('start', 1 /* rawLength */);
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} else if (match('$')) {
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return createAnchor('end', 1 /* rawLength */);
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} else if (match('\\b')) {
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return createAnchor('boundary', 2 /* rawLength */);
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} else if (match('\\B')) {
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return createAnchor('not-boundary', 2 /* rawLength */);
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} else {
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return parseGroup('(?=', 'lookahead', '(?!', 'negativeLookahead');
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}
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}
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|
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function parseQuantifier() {
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// Quantifier ::
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// QuantifierPrefix
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// QuantifierPrefix ?
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//
|
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// QuantifierPrefix ::
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// *
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// +
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// ?
|
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// { DecimalDigits }
|
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// { DecimalDigits , }
|
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// { DecimalDigits , DecimalDigits }
|
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|
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var res, from = pos;
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var quantifier;
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var min, max;
|
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if (match('*')) {
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quantifier = createQuantifier(0);
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}
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else if (match('+')) {
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quantifier = createQuantifier(1);
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}
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else if (match('?')) {
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quantifier = createQuantifier(0, 1);
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}
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else if (res = matchReg(/^\{([0-9]+)\}/)) {
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min = parseInt(res[1], 10);
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quantifier = createQuantifier(min, min, res.range[0], res.range[1]);
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}
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else if (res = matchReg(/^\{([0-9]+),\}/)) {
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min = parseInt(res[1], 10);
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quantifier = createQuantifier(min, undefined, res.range[0], res.range[1]);
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}
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else if (res = matchReg(/^\{([0-9]+),([0-9]+)\}/)) {
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min = parseInt(res[1], 10);
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max = parseInt(res[2], 10);
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if (min > max) {
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bail('numbers out of order in {} quantifier', '', from, pos);
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}
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quantifier = createQuantifier(min, max, res.range[0], res.range[1]);
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}
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if (quantifier) {
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if (match('?')) {
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quantifier.greedy = false;
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quantifier.range[1] += 1;
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}
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}
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return quantifier;
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}
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function parseAtomAndExtendedAtom() {
|
|
// Parsing Atom and ExtendedAtom together due to redundancy.
|
|
// ExtendedAtom is defined in Apendix B of the ECMA-262 standard.
|
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//
|
|
// SEE: https://www.ecma-international.org/ecma-262/10.0/index.html#prod-annexB-ExtendedPatternCharacter
|
|
//
|
|
// Atom ::
|
|
// PatternCharacter
|
|
// .
|
|
// \ AtomEscape
|
|
// CharacterClass
|
|
// ( GroupSpecifier Disjunction )
|
|
// ( ? : Disjunction )
|
|
// ExtendedAtom ::
|
|
// ExtendedPatternCharacter
|
|
// ExtendedPatternCharacter ::
|
|
// SourceCharacter but not one of ^$\.*+?()[|
|
|
|
|
var res;
|
|
|
|
// jviereck: allow ']', '}' here as well to be compatible with browser's
|
|
// implementations: ']'.match(/]/);
|
|
if (res = matchReg(/^[^^$\\.*+?()[\]{}|]/)) {
|
|
// PatternCharacter
|
|
return createCharacter(res);
|
|
}
|
|
else if (!hasUnicodeFlag && (res = matchReg(/^(?:]|})/))) {
|
|
// ExtendedPatternCharacter
|
|
return createCharacter(res);
|
|
}
|
|
else if (match('.')) {
|
|
// .
|
|
return createDot();
|
|
}
|
|
else if (match('\\')) {
|
|
// \ AtomEscape
|
|
res = parseAtomEscape();
|
|
if (!res) {
|
|
if (!hasUnicodeFlag && lookahead() == 'c') {
|
|
// B.1.4 ExtendedAtom
|
|
// \[lookahead = c]
|
|
return createValue('symbol', 92, pos - 1, pos);
|
|
}
|
|
bail('atomEscape');
|
|
}
|
|
return res;
|
|
}
|
|
else if (res = parseCharacterClass()) {
|
|
return res;
|
|
}
|
|
else if (features.lookbehind && (res = parseGroup('(?<=', 'lookbehind', '(?<!', 'negativeLookbehind'))) {
|
|
return res;
|
|
}
|
|
else if (features.namedGroups && match("(?<")) {
|
|
var name = parseIdentifier();
|
|
skip(">");
|
|
var group = finishGroup("normal", name.range[0] - 3);
|
|
group.name = name;
|
|
return group;
|
|
}
|
|
else {
|
|
// ( Disjunction )
|
|
// ( ? : Disjunction )
|
|
return parseGroup('(?:', 'ignore', '(', 'normal');
|
|
}
|
|
}
|
|
|
|
function parseUnicodeSurrogatePairEscape(firstEscape) {
|
|
if (hasUnicodeFlag) {
|
|
var first, second;
|
|
if (firstEscape.kind == 'unicodeEscape' &&
|
|
(first = firstEscape.codePoint) >= 0xD800 && first <= 0xDBFF &&
|
|
current('\\') && next('u') ) {
|
|
var prevPos = pos;
|
|
pos++;
|
|
var secondEscape = parseClassEscape();
|
|
if (secondEscape.kind == 'unicodeEscape' &&
|
|
(second = secondEscape.codePoint) >= 0xDC00 && second <= 0xDFFF) {
|
|
// Unicode surrogate pair
|
|
firstEscape.range[1] = secondEscape.range[1];
|
|
firstEscape.codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
|
|
firstEscape.type = 'value';
|
|
firstEscape.kind = 'unicodeCodePointEscape';
|
|
addRaw(firstEscape);
|
|
}
|
|
else {
|
|
pos = prevPos;
|
|
}
|
|
}
|
|
}
|
|
return firstEscape;
|
|
}
|
|
|
|
function parseClassEscape() {
|
|
return parseAtomEscape(true);
|
|
}
|
|
|
|
function parseAtomEscape(insideCharacterClass) {
|
|
// AtomEscape ::
|
|
// DecimalEscape
|
|
// CharacterEscape
|
|
// CharacterClassEscape
|
|
// k GroupName
|
|
|
|
var res, from = pos;
|
|
|
|
res = parseDecimalEscape() || parseNamedReference();
|
|
if (res) {
|
|
return res;
|
|
}
|
|
|
|
// For ClassEscape
|
|
if (insideCharacterClass) {
|
|
// b
|
|
if (match('b')) {
|
|
// 15.10.2.19
|
|
// The production ClassEscape :: b evaluates by returning the
|
|
// CharSet containing the one character <BS> (Unicode value 0008).
|
|
return createEscaped('singleEscape', 0x0008, '\\b');
|
|
} else if (match('B')) {
|
|
bail('\\B not possible inside of CharacterClass', '', from);
|
|
} else if (!hasUnicodeFlag && (res = matchReg(/^c([0-9])/))) {
|
|
// B.1.4
|
|
// c ClassControlLetter
|
|
return createEscaped('controlLetter', res[1] + 16, res[1], 2);
|
|
}
|
|
// [+U] -
|
|
if (match('-') && hasUnicodeFlag) {
|
|
return createEscaped('singleEscape', 0x002d, '\\-');
|
|
}
|
|
}
|
|
|
|
res = parseCharacterEscape();
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
function parseDecimalEscape() {
|
|
// DecimalEscape ::
|
|
// DecimalIntegerLiteral [lookahead ∉ DecimalDigit]
|
|
// CharacterClassEscape :: one of d D s S w W
|
|
|
|
var res, match;
|
|
|
|
if (res = matchReg(/^(?!0)\d+/)) {
|
|
match = res[0];
|
|
var refIdx = parseInt(res[0], 10);
|
|
if (refIdx <= closedCaptureCounter) {
|
|
// If the number is smaller than the normal-groups found so
|
|
// far, then it is a reference...
|
|
return createReference(res[0]);
|
|
} else {
|
|
// ... otherwise it needs to be interpreted as a octal (if the
|
|
// number is in an octal format). If it is NOT octal format,
|
|
// then the slash is ignored and the number is matched later
|
|
// as normal characters.
|
|
|
|
// Recall the negative decision to decide if the input must be parsed
|
|
// a second time with the total normal-groups.
|
|
backrefDenied.push(refIdx);
|
|
|
|
// Reset the position again, as maybe only parts of the previous
|
|
// matched numbers are actual octal numbers. E.g. in '019' only
|
|
// the '01' should be matched.
|
|
incr(-res[0].length);
|
|
if (res = matchReg(/^[0-7]{1,3}/)) {
|
|
return createEscaped('octal', parseInt(res[0], 8), res[0], 1);
|
|
} else {
|
|
// If we end up here, we have a case like /\91/. Then the
|
|
// first slash is to be ignored and the 9 & 1 to be treated
|
|
// like ordinary characters. Create a character for the
|
|
// first number only here - other number-characters
|
|
// (if available) will be matched later.
|
|
res = createCharacter(matchReg(/^[89]/));
|
|
return updateRawStart(res, res.range[0] - 1);
|
|
}
|
|
}
|
|
}
|
|
// Only allow octal numbers in the following. All matched numbers start
|
|
// with a zero (if the do not, the previous if-branch is executed).
|
|
// If the number is not octal format and starts with zero (e.g. `091`)
|
|
// then only the zeros `0` is treated here and the `91` are ordinary
|
|
// characters.
|
|
// Example:
|
|
// /\091/.exec('\091')[0].length === 3
|
|
else if (res = matchReg(/^[0-7]{1,3}/)) {
|
|
match = res[0];
|
|
if (/^0{1,3}$/.test(match)) {
|
|
// If they are all zeros, then only take the first one.
|
|
return createEscaped('null', 0x0000, '0', match.length + 1);
|
|
} else {
|
|
return createEscaped('octal', parseInt(match, 8), match, 1);
|
|
}
|
|
} else if (res = matchReg(/^[dDsSwW]/)) {
|
|
return createCharacterClassEscape(res[0]);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function parseNamedReference() {
|
|
if (features.namedGroups && matchReg(/^k<(?=.*?>)/)) {
|
|
var name = parseIdentifier();
|
|
skip('>');
|
|
return createNamedReference(name);
|
|
}
|
|
}
|
|
|
|
function parseRegExpUnicodeEscapeSequence() {
|
|
var res;
|
|
if (res = matchReg(/^u([0-9a-fA-F]{4})/)) {
|
|
// UnicodeEscapeSequence
|
|
return parseUnicodeSurrogatePairEscape(
|
|
createEscaped('unicodeEscape', parseInt(res[1], 16), res[1], 2)
|
|
);
|
|
} else if (hasUnicodeFlag && (res = matchReg(/^u\{([0-9a-fA-F]+)\}/))) {
|
|
// RegExpUnicodeEscapeSequence (ES6 Unicode code point escape)
|
|
return createEscaped('unicodeCodePointEscape', parseInt(res[1], 16), res[1], 4);
|
|
}
|
|
}
|
|
|
|
function parseCharacterEscape() {
|
|
// CharacterEscape ::
|
|
// ControlEscape
|
|
// c ControlLetter
|
|
// HexEscapeSequence
|
|
// UnicodeEscapeSequence
|
|
// IdentityEscape
|
|
|
|
var res;
|
|
var from = pos;
|
|
if (res = matchReg(/^[fnrtv]/)) {
|
|
// ControlEscape
|
|
var codePoint = 0;
|
|
switch (res[0]) {
|
|
case 't': codePoint = 0x009; break;
|
|
case 'n': codePoint = 0x00A; break;
|
|
case 'v': codePoint = 0x00B; break;
|
|
case 'f': codePoint = 0x00C; break;
|
|
case 'r': codePoint = 0x00D; break;
|
|
}
|
|
return createEscaped('singleEscape', codePoint, '\\' + res[0]);
|
|
} else if (res = matchReg(/^c([a-zA-Z])/)) {
|
|
// c ControlLetter
|
|
return createEscaped('controlLetter', res[1].charCodeAt(0) % 32, res[1], 2);
|
|
} else if (res = matchReg(/^x([0-9a-fA-F]{2})/)) {
|
|
// HexEscapeSequence
|
|
return createEscaped('hexadecimalEscape', parseInt(res[1], 16), res[1], 2);
|
|
} else if (res = parseRegExpUnicodeEscapeSequence()) {
|
|
if (!res || res.codePoint > 0x10FFFF) {
|
|
bail('Invalid escape sequence', null, from, pos);
|
|
}
|
|
return res;
|
|
} else if (features.unicodePropertyEscape && hasUnicodeFlag && (res = matchReg(/^([pP])\{([^\}]+)\}/))) {
|
|
// https://github.com/jviereck/regjsparser/issues/77
|
|
return addRaw({
|
|
type: 'unicodePropertyEscape',
|
|
negative: res[1] === 'P',
|
|
value: res[2],
|
|
range: [res.range[0] - 1, res.range[1]],
|
|
raw: res[0]
|
|
});
|
|
} else {
|
|
// IdentityEscape
|
|
return parseIdentityEscape();
|
|
}
|
|
}
|
|
|
|
function parseIdentifierAtom(check) {
|
|
var ch = lookahead();
|
|
var from = pos;
|
|
if (ch === '\\') {
|
|
incr();
|
|
var esc = parseRegExpUnicodeEscapeSequence();
|
|
if (!esc || !check(esc.codePoint)) {
|
|
bail('Invalid escape sequence', null, from, pos);
|
|
}
|
|
return fromCodePoint(esc.codePoint);
|
|
}
|
|
var code = ch.charCodeAt(0);
|
|
if (code >= 0xD800 && code <= 0xDBFF) {
|
|
ch += str[pos + 1];
|
|
var second = ch.charCodeAt(1);
|
|
if (second >= 0xDC00 && second <= 0xDFFF) {
|
|
// Unicode surrogate pair
|
|
code = (code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
|
|
}
|
|
}
|
|
if (!check(code)) return;
|
|
incr();
|
|
if (code > 0xFFFF) incr();
|
|
return ch;
|
|
}
|
|
|
|
function parseIdentifier() {
|
|
// RegExpIdentifierName ::
|
|
// RegExpIdentifierStart
|
|
// RegExpIdentifierName RegExpIdentifierContinue
|
|
//
|
|
// RegExpIdentifierStart ::
|
|
// UnicodeIDStart
|
|
// $
|
|
// _
|
|
// \ RegExpUnicodeEscapeSequence
|
|
//
|
|
// RegExpIdentifierContinue ::
|
|
// UnicodeIDContinue
|
|
// $
|
|
// _
|
|
// \ RegExpUnicodeEscapeSequence
|
|
// <ZWNJ>
|
|
// <ZWJ>
|
|
|
|
var start = pos;
|
|
var res = parseIdentifierAtom(isIdentifierStart);
|
|
if (!res) {
|
|
bail('Invalid identifier');
|
|
}
|
|
|
|
var ch;
|
|
while (ch = parseIdentifierAtom(isIdentifierPart)) {
|
|
res += ch;
|
|
}
|
|
|
|
return addRaw({
|
|
type: 'identifier',
|
|
value: res,
|
|
range: [start, pos]
|
|
});
|
|
}
|
|
|
|
function isIdentifierStart(ch) {
|
|
// Generated by `tools/generate-identifier-regex.js`.
|
|
var NonAsciiIdentifierStart = /[\$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\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u08A0-\u08B4\u08B6-\u08BD\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\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-\u1878\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\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-\u312F\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FEF\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7B9\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\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\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCB0-\uDCD3\uDCD8-\uDCFB\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-\uDE35\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDD00-\uDD23\uDF00-\uDF1C\uDF27\uDF30-\uDF45]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD44\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[\uDC00-\uDC34\uDC47-\uDC4A\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDF00-\uDF1A]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCDF\uDCFF\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE83\uDE86-\uDE89\uDE9D\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDEE0-\uDEF2]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE7F\uDF00-\uDF44\uDF50\uDF93-\uDF9F\uDFE0\uDFE1]|\uD821[\uDC00-\uDFF1]|\uD822[\uDC00-\uDEF2]|\uD82C[\uDC00-\uDD1E\uDD70-\uDEFB]|\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\uDD00-\uDD43]|\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\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]/;
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return (ch === 36) || (ch === 95) || // $ (dollar) and _ (underscore)
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(ch >= 65 && ch <= 90) || // A..Z
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(ch >= 97 && ch <= 122) || // a..z
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((ch >= 0x80) && NonAsciiIdentifierStart.test(fromCodePoint(ch)));
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}
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// Taken from the Esprima parser.
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function isIdentifierPart(ch) {
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// Generated by `tools/generate-identifier-regex.js`.
|
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var NonAsciiIdentifierPartOnly = /[0-9_\xB7\u0300-\u036F\u0387\u0483-\u0487\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u0610-\u061A\u064B-\u0669\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7\u06E8\u06EA-\u06ED\u06F0-\u06F9\u0711\u0730-\u074A\u07A6-\u07B0\u07C0-\u07C9\u07EB-\u07F3\u07FD\u0816-\u0819\u081B-\u0823\u0825-\u0827\u0829-\u082D\u0859-\u085B\u08D3-\u08E1\u08E3-\u0903\u093A-\u093C\u093E-\u094F\u0951-\u0957\u0962\u0963\u0966-\u096F\u0981-\u0983\u09BC\u09BE-\u09C4\u09C7\u09C8\u09CB-\u09CD\u09D7\u09E2\u09E3\u09E6-\u09EF\u09FE\u0A01-\u0A03\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A66-\u0A71\u0A75\u0A81-\u0A83\u0ABC\u0ABE-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AE2\u0AE3\u0AE6-\u0AEF\u0AFA-\u0AFF\u0B01-\u0B03\u0B3C\u0B3E-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B62\u0B63\u0B66-\u0B6F\u0B82\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD7\u0BE6-\u0BEF\u0C00-\u0C04\u0C3E-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C62\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0CBC\u0CBE-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CE2\u0CE3\u0CE6-\u0CEF\u0D00-\u0D03\u0D3B\u0D3C\u0D3E-\u0D44\u0D46-\u0D48\u0D4A-\u0D4D\u0D57\u0D62\u0D63\u0D66-\u0D6F\u0D82\u0D83\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E31\u0E34-\u0E3A\u0E47-\u0E4E\u0E50-\u0E59\u0EB1\u0EB4-\u0EB9\u0EBB\u0EBC\u0EC8-\u0ECD\u0ED0-\u0ED9\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E\u0F3F\u0F71-\u0F84\u0F86\u0F87\u0F8D-\u0F97\u0F99-\u0FBC\u0FC6\u102B-\u103E\u1040-\u1049\u1056-\u1059\u105E-\u1060\u1062-\u1064\u1067-\u106D\u1071-\u1074\u1082-\u108D\u108F-\u109D\u135D-\u135F\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17B4-\u17D3\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u18A9\u1920-\u192B\u1930-\u193B\u1946-\u194F\u19D0-\u19DA\u1A17-\u1A1B\u1A55-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AB0-\u1ABD\u1B00-\u1B04\u1B34-\u1B44\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1B82\u1BA1-\u1BAD\u1BB0-\u1BB9\u1BE6-\u1BF3\u1C24-\u1C37\u1C40-\u1C49\u1C50-\u1C59\u1CD0-\u1CD2\u1CD4-\u1CE8\u1CED\u1CF2-\u1CF4\u1CF7-\u1CF9\u1DC0-\u1DF9\u1DFB-\u1DFF\u200C\u200D\u203F\u2040\u2054\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2CEF-\u2CF1\u2D7F\u2DE0-\u2DFF\u302A-\u302F\u3099\u309A\uA620-\uA629\uA66F\uA674-\uA67D\uA69E\uA69F\uA6F0\uA6F1\uA802\uA806\uA80B\uA823-\uA827\uA880\uA881\uA8B4-\uA8C5\uA8D0-\uA8D9\uA8E0-\uA8F1\uA8FF-\uA909\uA926-\uA92D\uA947-\uA953\uA980-\uA983\uA9B3-\uA9C0\uA9D0-\uA9D9\uA9E5\uA9F0-\uA9F9\uAA29-\uAA36\uAA43\uAA4C\uAA4D\uAA50-\uAA59\uAA7B-\uAA7D\uAAB0\uAAB2-\uAAB4\uAAB7\uAAB8\uAABE\uAABF\uAAC1\uAAEB-\uAAEF\uAAF5\uAAF6\uABE3-\uABEA\uABEC\uABED\uABF0-\uABF9\uFB1E\uFE00-\uFE0F\uFE20-\uFE2F\uFE33\uFE34\uFE4D-\uFE4F\uFF10-\uFF19\uFF3F]|\uD800[\uDDFD\uDEE0\uDF76-\uDF7A]|\uD801[\uDCA0-\uDCA9]|\uD802[\uDE01-\uDE03\uDE05\uDE06\uDE0C-\uDE0F\uDE38-\uDE3A\uDE3F\uDEE5\uDEE6]|\uD803[\uDD24-\uDD27\uDD30-\uDD39\uDF46-\uDF50]|\uD804[\uDC00-\uDC02\uDC38-\uDC46\uDC66-\uDC6F\uDC7F-\uDC82\uDCB0-\uDCBA\uDCF0-\uDCF9\uDD00-\uDD02\uDD27-\uDD34\uDD36-\uDD3F\uDD45\uDD46\uDD73\uDD80-\uDD82\uDDB3-\uDDC0\uDDC9-\uDDCC\uDDD0-\uDDD9\uDE2C-\uDE37\uDE3E\uDEDF-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF3B\uDF3C\uDF3E-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF57\uDF62\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC35-\uDC46\uDC50-\uDC59\uDC5E\uDCB0-\uDCC3\uDCD0-\uDCD9\uDDAF-\uDDB5\uDDB8-\uDDC0\uDDDC\uDDDD\uDE30-\uDE40\uDE50-\uDE59\uDEAB-\uDEB7\uDEC0-\uDEC9\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDC2C-\uDC3A\uDCE0-\uDCE9\uDE01-\uDE0A\uDE33-\uDE39\uDE3B-\uDE3E\uDE47\uDE51-\uDE5B\uDE8A-\uDE99]|\uD807[\uDC2F-\uDC36\uDC38-\uDC3F\uDC50-\uDC59\uDC92-\uDCA7\uDCA9-\uDCB6\uDD31-\uDD36\uDD3A\uDD3C\uDD3D\uDD3F-\uDD45\uDD47\uDD50-\uDD59\uDD8A-\uDD8E\uDD90\uDD91\uDD93-\uDD97\uDDA0-\uDDA9\uDEF3-\uDEF6]|\uD81A[\uDE60-\uDE69\uDEF0-\uDEF4\uDF30-\uDF36\uDF50-\uDF59]|\uD81B[\uDF51-\uDF7E\uDF8F-\uDF92]|\uD82F[\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD838[\uDC00-\uDC06\uDC08-\uDC18\uDC1B-\uDC21\uDC23\uDC24\uDC26-\uDC2A]|\uD83A[\uDCD0-\uDCD6\uDD44-\uDD4A\uDD50-\uDD59]|\uDB40[\uDD00-\uDDEF]/;
|
|
|
|
return isIdentifierStart(ch) ||
|
|
(ch >= 48 && ch <= 57) || // 0..9
|
|
((ch >= 0x80) && NonAsciiIdentifierPartOnly.test(fromCodePoint(ch)));
|
|
}
|
|
|
|
function parseIdentityEscape() {
|
|
// IdentityEscape ::
|
|
// [+U] SyntaxCharacter
|
|
// [+U] /
|
|
// [~U] SourceCharacterIdentityEscape[?N]
|
|
// SourceCharacterIdentityEscape[?N] ::
|
|
// [~N] SourceCharacter but not c
|
|
// [+N] SourceCharacter but not one of c or k
|
|
|
|
|
|
var tmp;
|
|
var l = lookahead();
|
|
if (
|
|
(hasUnicodeFlag && /[\^\$\.\*\+\?\(\)\\\[\]\{\}\|\/]/.test(l)) ||
|
|
(!hasUnicodeFlag && l !== "c")
|
|
) {
|
|
if (l === "k" && features.lookbehind) {
|
|
return null;
|
|
}
|
|
tmp = incr();
|
|
return createEscaped('identifier', tmp.charCodeAt(0), tmp, 1);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function parseCharacterClass() {
|
|
// CharacterClass ::
|
|
// [ [lookahead ∉ {^}] ClassRanges ]
|
|
// [ ^ ClassRanges ]
|
|
|
|
var res, from = pos;
|
|
if (res = matchReg(/^\[\^/)) {
|
|
res = parseClassRanges();
|
|
skip(']');
|
|
return createCharacterClass(res, true, from, pos);
|
|
} else if (match('[')) {
|
|
res = parseClassRanges();
|
|
skip(']');
|
|
return createCharacterClass(res, false, from, pos);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function parseClassRanges() {
|
|
// ClassRanges ::
|
|
// [empty]
|
|
// NonemptyClassRanges
|
|
|
|
var res;
|
|
if (current(']')) {
|
|
// Empty array means nothing insinde of the ClassRange.
|
|
return [];
|
|
} else {
|
|
res = parseNonemptyClassRanges();
|
|
if (!res) {
|
|
bail('nonEmptyClassRanges');
|
|
}
|
|
return res;
|
|
}
|
|
}
|
|
|
|
function parseHelperClassRanges(atom) {
|
|
var from, to, res;
|
|
if (current('-') && !next(']')) {
|
|
// ClassAtom - ClassAtom ClassRanges
|
|
skip('-');
|
|
|
|
res = parseClassAtom();
|
|
if (!res) {
|
|
bail('classAtom');
|
|
}
|
|
to = pos;
|
|
var classRanges = parseClassRanges();
|
|
if (!classRanges) {
|
|
bail('classRanges');
|
|
}
|
|
from = atom.range[0];
|
|
if (classRanges.type === 'empty') {
|
|
return [createClassRange(atom, res, from, to)];
|
|
}
|
|
return [createClassRange(atom, res, from, to)].concat(classRanges);
|
|
}
|
|
|
|
res = parseNonemptyClassRangesNoDash();
|
|
if (!res) {
|
|
bail('nonEmptyClassRangesNoDash');
|
|
}
|
|
|
|
return [atom].concat(res);
|
|
}
|
|
|
|
function parseNonemptyClassRanges() {
|
|
// NonemptyClassRanges ::
|
|
// ClassAtom
|
|
// ClassAtom NonemptyClassRangesNoDash
|
|
// ClassAtom - ClassAtom ClassRanges
|
|
|
|
var atom = parseClassAtom();
|
|
if (!atom) {
|
|
bail('classAtom');
|
|
}
|
|
|
|
if (current(']')) {
|
|
// ClassAtom
|
|
return [atom];
|
|
}
|
|
|
|
// ClassAtom NonemptyClassRangesNoDash
|
|
// ClassAtom - ClassAtom ClassRanges
|
|
return parseHelperClassRanges(atom);
|
|
}
|
|
|
|
function parseNonemptyClassRangesNoDash() {
|
|
// NonemptyClassRangesNoDash ::
|
|
// ClassAtom
|
|
// ClassAtomNoDash NonemptyClassRangesNoDash
|
|
// ClassAtomNoDash - ClassAtom ClassRanges
|
|
|
|
var res = parseClassAtom();
|
|
if (!res) {
|
|
bail('classAtom');
|
|
}
|
|
if (current(']')) {
|
|
// ClassAtom
|
|
return res;
|
|
}
|
|
|
|
// ClassAtomNoDash NonemptyClassRangesNoDash
|
|
// ClassAtomNoDash - ClassAtom ClassRanges
|
|
return parseHelperClassRanges(res);
|
|
}
|
|
|
|
function parseClassAtom() {
|
|
// ClassAtom ::
|
|
// -
|
|
// ClassAtomNoDash
|
|
if (match('-')) {
|
|
return createCharacter('-');
|
|
} else {
|
|
return parseClassAtomNoDash();
|
|
}
|
|
}
|
|
|
|
function parseClassAtomNoDash() {
|
|
// ClassAtomNoDash ::
|
|
// SourceCharacter but not one of \ or ] or -
|
|
// \ ClassEscape
|
|
|
|
var res;
|
|
if (res = matchReg(/^[^\\\]-]/)) {
|
|
return createCharacter(res[0]);
|
|
} else if (match('\\')) {
|
|
res = parseClassEscape();
|
|
if (!res) {
|
|
bail('classEscape');
|
|
}
|
|
|
|
return parseUnicodeSurrogatePairEscape(res);
|
|
}
|
|
}
|
|
|
|
function bail(message, details, from, to) {
|
|
from = from == null ? pos : from;
|
|
to = to == null ? from : to;
|
|
|
|
var contextStart = Math.max(0, from - 10);
|
|
var contextEnd = Math.min(to + 10, str.length);
|
|
|
|
// Output a bit of context and a line pointing to where our error is.
|
|
//
|
|
// We are assuming that there are no actual newlines in the content as this is a regular expression.
|
|
var context = ' ' + str.substring(contextStart, contextEnd);
|
|
var pointer = ' ' + new Array(from - contextStart + 1).join(' ') + '^';
|
|
|
|
throw SyntaxError(message + ' at position ' + from + (details ? ': ' + details : '') + '\n' + context + '\n' + pointer);
|
|
}
|
|
|
|
var backrefDenied = [];
|
|
var closedCaptureCounter = 0;
|
|
var firstIteration = true;
|
|
var hasUnicodeFlag = (flags || "").indexOf("u") !== -1;
|
|
var pos = 0;
|
|
|
|
// Convert the input to a string and treat the empty string special.
|
|
str = String(str);
|
|
if (str === '') {
|
|
str = '(?:)';
|
|
}
|
|
|
|
var result = parseDisjunction();
|
|
|
|
if (result.range[1] !== str.length) {
|
|
bail('Could not parse entire input - got stuck', '', result.range[1]);
|
|
}
|
|
|
|
// The spec requires to interpret the `\2` in `/\2()()/` as backreference.
|
|
// As the parser collects the number of capture groups as the string is
|
|
// parsed it is impossible to make these decisions at the point when the
|
|
// `\2` is handled. In case the local decision turns out to be wrong after
|
|
// the parsing has finished, the input string is parsed a second time with
|
|
// the total number of capture groups set.
|
|
//
|
|
// SEE: https://github.com/jviereck/regjsparser/issues/70
|
|
for (var i = 0; i < backrefDenied.length; i++) {
|
|
if (backrefDenied[i] <= closedCaptureCounter) {
|
|
// Parse the input a second time.
|
|
pos = 0;
|
|
firstIteration = false;
|
|
return parseDisjunction();
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
var regjsparser = {
|
|
parse: parse
|
|
};
|
|
|
|
if (typeof module !== 'undefined' && module.exports) {
|
|
module.exports = regjsparser;
|
|
} else {
|
|
window.regjsparser = regjsparser;
|
|
}
|
|
|
|
}());
|