namespace ts { export type ErrorCallback = (message: DiagnosticMessage, length: number) => void; /* @internal */ export function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean { return token >= SyntaxKind.Identifier; } /* @internal */ export function tokenIsIdentifierOrKeywordOrGreaterThan(token: SyntaxKind): boolean { return token === SyntaxKind.GreaterThanToken || tokenIsIdentifierOrKeyword(token); } export interface Scanner { getStartPos(): number; getToken(): SyntaxKind; getTextPos(): number; getTokenPos(): number; getTokenText(): string; getTokenValue(): string; hasUnicodeEscape(): boolean; hasExtendedUnicodeEscape(): boolean; hasPrecedingLineBreak(): boolean; /* @internal */ hasPrecedingJSDocComment(): boolean; isIdentifier(): boolean; isReservedWord(): boolean; isUnterminated(): boolean; /* @internal */ getNumericLiteralFlags(): TokenFlags; /* @internal */ getCommentDirectives(): CommentDirective[] | undefined; /* @internal */ getTokenFlags(): TokenFlags; reScanGreaterToken(): SyntaxKind; reScanSlashToken(): SyntaxKind; reScanAsteriskEqualsToken(): SyntaxKind; reScanTemplateToken(isTaggedTemplate: boolean): SyntaxKind; reScanTemplateHeadOrNoSubstitutionTemplate(): SyntaxKind; scanJsxIdentifier(): SyntaxKind; scanJsxAttributeValue(): SyntaxKind; reScanJsxAttributeValue(): SyntaxKind; reScanJsxToken(): JsxTokenSyntaxKind; reScanLessThanToken(): SyntaxKind; reScanQuestionToken(): SyntaxKind; scanJsxToken(): JsxTokenSyntaxKind; scanJsDocToken(): JSDocSyntaxKind; scan(): SyntaxKind; getText(): string; /* @internal */ clearCommentDirectives(): void; // Sets the text for the scanner to scan. An optional subrange starting point and length // can be provided to have the scanner only scan a portion of the text. setText(text: string | undefined, start?: number, length?: number): void; setOnError(onError: ErrorCallback | undefined): void; setScriptTarget(scriptTarget: ScriptTarget): void; setLanguageVariant(variant: LanguageVariant): void; setTextPos(textPos: number): void; /* @internal */ setInJSDocType(inType: boolean): void; // Invokes the provided callback then unconditionally restores the scanner to the state it // was in immediately prior to invoking the callback. The result of invoking the callback // is returned from this function. lookAhead(callback: () => T): T; // Invokes the callback with the scanner set to scan the specified range. When the callback // returns, the scanner is restored to the state it was in before scanRange was called. scanRange(start: number, length: number, callback: () => T): T; // Invokes the provided callback. If the callback returns something falsy, then it restores // the scanner to the state it was in immediately prior to invoking the callback. If the // callback returns something truthy, then the scanner state is not rolled back. The result // of invoking the callback is returned from this function. tryScan(callback: () => T): T; } const textToKeywordObj: MapLike = { abstract: SyntaxKind.AbstractKeyword, any: SyntaxKind.AnyKeyword, as: SyntaxKind.AsKeyword, asserts: SyntaxKind.AssertsKeyword, bigint: SyntaxKind.BigIntKeyword, boolean: SyntaxKind.BooleanKeyword, break: SyntaxKind.BreakKeyword, case: SyntaxKind.CaseKeyword, catch: SyntaxKind.CatchKeyword, class: SyntaxKind.ClassKeyword, continue: SyntaxKind.ContinueKeyword, const: SyntaxKind.ConstKeyword, ["" + "constructor"]: SyntaxKind.ConstructorKeyword, debugger: SyntaxKind.DebuggerKeyword, declare: SyntaxKind.DeclareKeyword, default: SyntaxKind.DefaultKeyword, delete: SyntaxKind.DeleteKeyword, do: SyntaxKind.DoKeyword, else: SyntaxKind.ElseKeyword, enum: SyntaxKind.EnumKeyword, export: SyntaxKind.ExportKeyword, extends: SyntaxKind.ExtendsKeyword, false: SyntaxKind.FalseKeyword, finally: SyntaxKind.FinallyKeyword, for: SyntaxKind.ForKeyword, from: SyntaxKind.FromKeyword, function: SyntaxKind.FunctionKeyword, get: SyntaxKind.GetKeyword, if: SyntaxKind.IfKeyword, implements: SyntaxKind.ImplementsKeyword, import: SyntaxKind.ImportKeyword, in: SyntaxKind.InKeyword, infer: SyntaxKind.InferKeyword, instanceof: SyntaxKind.InstanceOfKeyword, interface: SyntaxKind.InterfaceKeyword, is: SyntaxKind.IsKeyword, keyof: SyntaxKind.KeyOfKeyword, let: SyntaxKind.LetKeyword, module: SyntaxKind.ModuleKeyword, namespace: SyntaxKind.NamespaceKeyword, never: SyntaxKind.NeverKeyword, new: SyntaxKind.NewKeyword, null: SyntaxKind.NullKeyword, number: SyntaxKind.NumberKeyword, object: SyntaxKind.ObjectKeyword, package: SyntaxKind.PackageKeyword, private: SyntaxKind.PrivateKeyword, protected: SyntaxKind.ProtectedKeyword, public: SyntaxKind.PublicKeyword, readonly: SyntaxKind.ReadonlyKeyword, require: SyntaxKind.RequireKeyword, global: SyntaxKind.GlobalKeyword, return: SyntaxKind.ReturnKeyword, set: SyntaxKind.SetKeyword, static: SyntaxKind.StaticKeyword, string: SyntaxKind.StringKeyword, super: SyntaxKind.SuperKeyword, switch: SyntaxKind.SwitchKeyword, symbol: SyntaxKind.SymbolKeyword, this: SyntaxKind.ThisKeyword, throw: SyntaxKind.ThrowKeyword, true: SyntaxKind.TrueKeyword, try: SyntaxKind.TryKeyword, type: SyntaxKind.TypeKeyword, typeof: SyntaxKind.TypeOfKeyword, undefined: SyntaxKind.UndefinedKeyword, unique: SyntaxKind.UniqueKeyword, unknown: SyntaxKind.UnknownKeyword, var: SyntaxKind.VarKeyword, void: SyntaxKind.VoidKeyword, while: SyntaxKind.WhileKeyword, with: SyntaxKind.WithKeyword, yield: SyntaxKind.YieldKeyword, async: SyntaxKind.AsyncKeyword, await: SyntaxKind.AwaitKeyword, of: SyntaxKind.OfKeyword, }; const textToKeyword = createMapFromTemplate(textToKeywordObj); const textToToken = createMapFromTemplate({ ...textToKeywordObj, "{": SyntaxKind.OpenBraceToken, "}": SyntaxKind.CloseBraceToken, "(": SyntaxKind.OpenParenToken, ")": SyntaxKind.CloseParenToken, "[": SyntaxKind.OpenBracketToken, "]": SyntaxKind.CloseBracketToken, ".": SyntaxKind.DotToken, "...": SyntaxKind.DotDotDotToken, ";": SyntaxKind.SemicolonToken, ",": SyntaxKind.CommaToken, "<": SyntaxKind.LessThanToken, ">": SyntaxKind.GreaterThanToken, "<=": SyntaxKind.LessThanEqualsToken, ">=": SyntaxKind.GreaterThanEqualsToken, "==": SyntaxKind.EqualsEqualsToken, "!=": SyntaxKind.ExclamationEqualsToken, "===": SyntaxKind.EqualsEqualsEqualsToken, "!==": SyntaxKind.ExclamationEqualsEqualsToken, "=>": SyntaxKind.EqualsGreaterThanToken, "+": SyntaxKind.PlusToken, "-": SyntaxKind.MinusToken, "**": SyntaxKind.AsteriskAsteriskToken, "*": SyntaxKind.AsteriskToken, "/": SyntaxKind.SlashToken, "%": SyntaxKind.PercentToken, "++": SyntaxKind.PlusPlusToken, "--": SyntaxKind.MinusMinusToken, "<<": SyntaxKind.LessThanLessThanToken, ">": SyntaxKind.GreaterThanGreaterThanToken, ">>>": SyntaxKind.GreaterThanGreaterThanGreaterThanToken, "&": SyntaxKind.AmpersandToken, "|": SyntaxKind.BarToken, "^": SyntaxKind.CaretToken, "!": SyntaxKind.ExclamationToken, "~": SyntaxKind.TildeToken, "&&": SyntaxKind.AmpersandAmpersandToken, "||": SyntaxKind.BarBarToken, "?": SyntaxKind.QuestionToken, "??": SyntaxKind.QuestionQuestionToken, "?.": SyntaxKind.QuestionDotToken, ":": SyntaxKind.ColonToken, "=": SyntaxKind.EqualsToken, "+=": SyntaxKind.PlusEqualsToken, "-=": SyntaxKind.MinusEqualsToken, "*=": SyntaxKind.AsteriskEqualsToken, "**=": SyntaxKind.AsteriskAsteriskEqualsToken, "/=": SyntaxKind.SlashEqualsToken, "%=": SyntaxKind.PercentEqualsToken, "<<=": SyntaxKind.LessThanLessThanEqualsToken, ">>=": SyntaxKind.GreaterThanGreaterThanEqualsToken, ">>>=": SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken, "&=": SyntaxKind.AmpersandEqualsToken, "|=": SyntaxKind.BarEqualsToken, "^=": SyntaxKind.CaretEqualsToken, "||=": SyntaxKind.BarBarEqualsToken, "&&=": SyntaxKind.AmpersandAmpersandEqualsToken, "??=": SyntaxKind.QuestionQuestionEqualsToken, "@": SyntaxKind.AtToken, "`": SyntaxKind.BacktickToken }); /* As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers IdentifierStart :: Can contain Unicode 3.0.0 categories: Uppercase letter (Lu), Lowercase letter (Ll), Titlecase letter (Lt), Modifier letter (Lm), Other letter (Lo), or Letter number (Nl). IdentifierPart :: = Can contain IdentifierStart + Unicode 3.0.0 categories: Non-spacing mark (Mn), Combining spacing mark (Mc), Decimal number (Nd), or Connector punctuation (Pc). Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at: http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt */ const unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, ]; const unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, ]; /* As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers IdentifierStart :: Can contain Unicode 6.2 categories: Uppercase letter (Lu), Lowercase letter (Ll), Titlecase letter (Lt), Modifier letter (Lm), Other letter (Lo), or Letter number (Nl). IdentifierPart :: Can contain IdentifierStart + Unicode 6.2 categories: Non-spacing mark (Mn), Combining spacing mark (Mc), Decimal number (Nd), Connector punctuation (Pc), , or . Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at: http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt */ const unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, ]; const unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, ]; /** * Generated by scripts/regenerate-unicode-identifier-parts.js on node v12.4.0 with unicode 12.1 * based on http://www.unicode.org/reports/tr31/ and https://www.ecma-international.org/ecma-262/6.0/#sec-names-and-keywords * unicodeESNextIdentifierStart corresponds to the ID_Start and Other_ID_Start property, and * unicodeESNextIdentifierPart corresponds to ID_Continue, Other_ID_Continue, plus ID_Start and Other_ID_Start */ const unicodeESNextIdentifierStart = [65, 90, 97, 122, 170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 895, 895, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1327, 1329, 1366, 1369, 1369, 1376, 1416, 1488, 1514, 1519, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2144, 2154, 2208, 2228, 2230, 2237, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2432, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2556, 2556, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2809, 2809, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3129, 3133, 3133, 3160, 3162, 3168, 3169, 3200, 3200, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3412, 3414, 3423, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3718, 3722, 3724, 3747, 3749, 3749, 3751, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5109, 5112, 5117, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5880, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6264, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6430, 6480, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7296, 7304, 7312, 7354, 7357, 7359, 7401, 7404, 7406, 7411, 7413, 7414, 7418, 7418, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8472, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12443, 12447, 12449, 12538, 12540, 12543, 12549, 12591, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40943, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42653, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42943, 42946, 42950, 42999, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43261, 43262, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43488, 43492, 43494, 43503, 43514, 43518, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43646, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43824, 43866, 43868, 43879, 43888, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, 65536, 65547, 65549, 65574, 65576, 65594, 65596, 65597, 65599, 65613, 65616, 65629, 65664, 65786, 65856, 65908, 66176, 66204, 66208, 66256, 66304, 66335, 66349, 66378, 66384, 66421, 66432, 66461, 66464, 66499, 66504, 66511, 66513, 66517, 66560, 66717, 66736, 66771, 66776, 66811, 66816, 66855, 66864, 66915, 67072, 67382, 67392, 67413, 67424, 67431, 67584, 67589, 67592, 67592, 67594, 67637, 67639, 67640, 67644, 67644, 67647, 67669, 67680, 67702, 67712, 67742, 67808, 67826, 67828, 67829, 67840, 67861, 67872, 67897, 67968, 68023, 68030, 68031, 68096, 68096, 68112, 68115, 68117, 68119, 68121, 68149, 68192, 68220, 68224, 68252, 68288, 68295, 68297, 68324, 68352, 68405, 68416, 68437, 68448, 68466, 68480, 68497, 68608, 68680, 68736, 68786, 68800, 68850, 68864, 68899, 69376, 69404, 69415, 69415, 69424, 69445, 69600, 69622, 69635, 69687, 69763, 69807, 69840, 69864, 69891, 69926, 69956, 69956, 69968, 70002, 70006, 70006, 70019, 70066, 70081, 70084, 70106, 70106, 70108, 70108, 70144, 70161, 70163, 70187, 70272, 70278, 70280, 70280, 70282, 70285, 70287, 70301, 70303, 70312, 70320, 70366, 70405, 70412, 70415, 70416, 70419, 70440, 70442, 70448, 70450, 70451, 70453, 70457, 70461, 70461, 70480, 70480, 70493, 70497, 70656, 70708, 70727, 70730, 70751, 70751, 70784, 70831, 70852, 70853, 70855, 70855, 71040, 71086, 71128, 71131, 71168, 71215, 71236, 71236, 71296, 71338, 71352, 71352, 71424, 71450, 71680, 71723, 71840, 71903, 71935, 71935, 72096, 72103, 72106, 72144, 72161, 72161, 72163, 72163, 72192, 72192, 72203, 72242, 72250, 72250, 72272, 72272, 72284, 72329, 72349, 72349, 72384, 72440, 72704, 72712, 72714, 72750, 72768, 72768, 72818, 72847, 72960, 72966, 72968, 72969, 72971, 73008, 73030, 73030, 73056, 73061, 73063, 73064, 73066, 73097, 73112, 73112, 73440, 73458, 73728, 74649, 74752, 74862, 74880, 75075, 77824, 78894, 82944, 83526, 92160, 92728, 92736, 92766, 92880, 92909, 92928, 92975, 92992, 92995, 93027, 93047, 93053, 93071, 93760, 93823, 93952, 94026, 94032, 94032, 94099, 94111, 94176, 94177, 94179, 94179, 94208, 100343, 100352, 101106, 110592, 110878, 110928, 110930, 110948, 110951, 110960, 111355, 113664, 113770, 113776, 113788, 113792, 113800, 113808, 113817, 119808, 119892, 119894, 119964, 119966, 119967, 119970, 119970, 119973, 119974, 119977, 119980, 119982, 119993, 119995, 119995, 119997, 120003, 120005, 120069, 120071, 120074, 120077, 120084, 120086, 120092, 120094, 120121, 120123, 120126, 120128, 120132, 120134, 120134, 120138, 120144, 120146, 120485, 120488, 120512, 120514, 120538, 120540, 120570, 120572, 120596, 120598, 120628, 120630, 120654, 120656, 120686, 120688, 120712, 120714, 120744, 120746, 120770, 120772, 120779, 123136, 123180, 123191, 123197, 123214, 123214, 123584, 123627, 124928, 125124, 125184, 125251, 125259, 125259, 126464, 126467, 126469, 126495, 126497, 126498, 126500, 126500, 126503, 126503, 126505, 126514, 126516, 126519, 126521, 126521, 126523, 126523, 126530, 126530, 126535, 126535, 126537, 126537, 126539, 126539, 126541, 126543, 126545, 126546, 126548, 126548, 126551, 126551, 126553, 126553, 126555, 126555, 126557, 126557, 126559, 126559, 126561, 126562, 126564, 126564, 126567, 126570, 126572, 126578, 126580, 126583, 126585, 126588, 126590, 126590, 126592, 126601, 126603, 126619, 126625, 126627, 126629, 126633, 126635, 126651, 131072, 173782, 173824, 177972, 177984, 178205, 178208, 183969, 183984, 191456, 194560, 195101]; const unicodeESNextIdentifierPart = [48, 57, 65, 90, 95, 95, 97, 122, 170, 170, 181, 181, 183, 183, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 895, 895, 902, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1327, 1329, 1366, 1369, 1369, 1376, 1416, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1519, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2045, 2045, 2048, 2093, 2112, 2139, 2144, 2154, 2208, 2228, 2230, 2237, 2259, 2273, 2275, 2403, 2406, 2415, 2417, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2556, 2556, 2558, 2558, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2809, 2815, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3072, 3084, 3086, 3088, 3090, 3112, 3114, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3162, 3168, 3171, 3174, 3183, 3200, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3328, 3331, 3333, 3340, 3342, 3344, 3346, 3396, 3398, 3400, 3402, 3406, 3412, 3415, 3423, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3558, 3567, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3718, 3722, 3724, 3747, 3749, 3749, 3751, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4969, 4977, 4992, 5007, 5024, 5109, 5112, 5117, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5880, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6264, 6272, 6314, 6320, 6389, 6400, 6430, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6618, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6832, 6845, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7296, 7304, 7312, 7354, 7357, 7359, 7376, 7378, 7380, 7418, 7424, 7673, 7675, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8472, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12447, 12449, 12538, 12540, 12543, 12549, 12591, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40943, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42737, 42775, 42783, 42786, 42888, 42891, 42943, 42946, 42950, 42999, 43047, 43072, 43123, 43136, 43205, 43216, 43225, 43232, 43255, 43259, 43259, 43261, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43488, 43518, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43824, 43866, 43868, 43879, 43888, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65071, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500, 65536, 65547, 65549, 65574, 65576, 65594, 65596, 65597, 65599, 65613, 65616, 65629, 65664, 65786, 65856, 65908, 66045, 66045, 66176, 66204, 66208, 66256, 66272, 66272, 66304, 66335, 66349, 66378, 66384, 66426, 66432, 66461, 66464, 66499, 66504, 66511, 66513, 66517, 66560, 66717, 66720, 66729, 66736, 66771, 66776, 66811, 66816, 66855, 66864, 66915, 67072, 67382, 67392, 67413, 67424, 67431, 67584, 67589, 67592, 67592, 67594, 67637, 67639, 67640, 67644, 67644, 67647, 67669, 67680, 67702, 67712, 67742, 67808, 67826, 67828, 67829, 67840, 67861, 67872, 67897, 67968, 68023, 68030, 68031, 68096, 68099, 68101, 68102, 68108, 68115, 68117, 68119, 68121, 68149, 68152, 68154, 68159, 68159, 68192, 68220, 68224, 68252, 68288, 68295, 68297, 68326, 68352, 68405, 68416, 68437, 68448, 68466, 68480, 68497, 68608, 68680, 68736, 68786, 68800, 68850, 68864, 68903, 68912, 68921, 69376, 69404, 69415, 69415, 69424, 69456, 69600, 69622, 69632, 69702, 69734, 69743, 69759, 69818, 69840, 69864, 69872, 69881, 69888, 69940, 69942, 69951, 69956, 69958, 69968, 70003, 70006, 70006, 70016, 70084, 70089, 70092, 70096, 70106, 70108, 70108, 70144, 70161, 70163, 70199, 70206, 70206, 70272, 70278, 70280, 70280, 70282, 70285, 70287, 70301, 70303, 70312, 70320, 70378, 70384, 70393, 70400, 70403, 70405, 70412, 70415, 70416, 70419, 70440, 70442, 70448, 70450, 70451, 70453, 70457, 70459, 70468, 70471, 70472, 70475, 70477, 70480, 70480, 70487, 70487, 70493, 70499, 70502, 70508, 70512, 70516, 70656, 70730, 70736, 70745, 70750, 70751, 70784, 70853, 70855, 70855, 70864, 70873, 71040, 71093, 71096, 71104, 71128, 71133, 71168, 71232, 71236, 71236, 71248, 71257, 71296, 71352, 71360, 71369, 71424, 71450, 71453, 71467, 71472, 71481, 71680, 71738, 71840, 71913, 71935, 71935, 72096, 72103, 72106, 72151, 72154, 72161, 72163, 72164, 72192, 72254, 72263, 72263, 72272, 72345, 72349, 72349, 72384, 72440, 72704, 72712, 72714, 72758, 72760, 72768, 72784, 72793, 72818, 72847, 72850, 72871, 72873, 72886, 72960, 72966, 72968, 72969, 72971, 73014, 73018, 73018, 73020, 73021, 73023, 73031, 73040, 73049, 73056, 73061, 73063, 73064, 73066, 73102, 73104, 73105, 73107, 73112, 73120, 73129, 73440, 73462, 73728, 74649, 74752, 74862, 74880, 75075, 77824, 78894, 82944, 83526, 92160, 92728, 92736, 92766, 92768, 92777, 92880, 92909, 92912, 92916, 92928, 92982, 92992, 92995, 93008, 93017, 93027, 93047, 93053, 93071, 93760, 93823, 93952, 94026, 94031, 94087, 94095, 94111, 94176, 94177, 94179, 94179, 94208, 100343, 100352, 101106, 110592, 110878, 110928, 110930, 110948, 110951, 110960, 111355, 113664, 113770, 113776, 113788, 113792, 113800, 113808, 113817, 113821, 113822, 119141, 119145, 119149, 119154, 119163, 119170, 119173, 119179, 119210, 119213, 119362, 119364, 119808, 119892, 119894, 119964, 119966, 119967, 119970, 119970, 119973, 119974, 119977, 119980, 119982, 119993, 119995, 119995, 119997, 120003, 120005, 120069, 120071, 120074, 120077, 120084, 120086, 120092, 120094, 120121, 120123, 120126, 120128, 120132, 120134, 120134, 120138, 120144, 120146, 120485, 120488, 120512, 120514, 120538, 120540, 120570, 120572, 120596, 120598, 120628, 120630, 120654, 120656, 120686, 120688, 120712, 120714, 120744, 120746, 120770, 120772, 120779, 120782, 120831, 121344, 121398, 121403, 121452, 121461, 121461, 121476, 121476, 121499, 121503, 121505, 121519, 122880, 122886, 122888, 122904, 122907, 122913, 122915, 122916, 122918, 122922, 123136, 123180, 123184, 123197, 123200, 123209, 123214, 123214, 123584, 123641, 124928, 125124, 125136, 125142, 125184, 125259, 125264, 125273, 126464, 126467, 126469, 126495, 126497, 126498, 126500, 126500, 126503, 126503, 126505, 126514, 126516, 126519, 126521, 126521, 126523, 126523, 126530, 126530, 126535, 126535, 126537, 126537, 126539, 126539, 126541, 126543, 126545, 126546, 126548, 126548, 126551, 126551, 126553, 126553, 126555, 126555, 126557, 126557, 126559, 126559, 126561, 126562, 126564, 126564, 126567, 126570, 126572, 126578, 126580, 126583, 126585, 126588, 126590, 126590, 126592, 126601, 126603, 126619, 126625, 126627, 126629, 126633, 126635, 126651, 131072, 173782, 173824, 177972, 177984, 178205, 178208, 183969, 183984, 191456, 194560, 195101, 917760, 917999]; /** * Test for whether a single line comment's text contains a directive. */ const commentDirectiveRegExSingleLine = /^\s*\/\/\/?\s*@(ts-expect-error|ts-ignore)/; /** * Test for whether a multi-line comment's last line contains a directive. */ const commentDirectiveRegExMultiLine = /^\s*(?:\/|\*)*\s*@(ts-expect-error|ts-ignore)/; function lookupInUnicodeMap(code: number, map: readonly number[]): boolean { // Bail out quickly if it couldn't possibly be in the map. if (code < map[0]) { return false; } // Perform binary search in one of the Unicode range maps let lo = 0; let hi: number = map.length; let mid: number; while (lo + 1 < hi) { mid = lo + (hi - lo) / 2; // mid has to be even to catch a range's beginning mid -= mid % 2; if (map[mid] <= code && code <= map[mid + 1]) { return true; } if (code < map[mid]) { hi = mid; } else { lo = mid + 2; } } return false; } /* @internal */ export function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget | undefined) { return languageVersion! >= ScriptTarget.ES2015 ? lookupInUnicodeMap(code, unicodeESNextIdentifierStart) : languageVersion === ScriptTarget.ES5 ? lookupInUnicodeMap(code, unicodeES5IdentifierStart) : lookupInUnicodeMap(code, unicodeES3IdentifierStart); } function isUnicodeIdentifierPart(code: number, languageVersion: ScriptTarget | undefined) { return languageVersion! >= ScriptTarget.ES2015 ? lookupInUnicodeMap(code, unicodeESNextIdentifierPart) : languageVersion === ScriptTarget.ES5 ? lookupInUnicodeMap(code, unicodeES5IdentifierPart) : lookupInUnicodeMap(code, unicodeES3IdentifierPart); } function makeReverseMap(source: ESMap): string[] { const result: string[] = []; source.forEach((value, name) => { result[value] = name; }); return result; } const tokenStrings = makeReverseMap(textToToken); export function tokenToString(t: SyntaxKind): string | undefined { return tokenStrings[t]; } /* @internal */ export function stringToToken(s: string): SyntaxKind | undefined { return textToToken.get(s); } /* @internal */ export function computeLineStarts(text: string): number[] { const result: number[] = new Array(); let pos = 0; let lineStart = 0; while (pos < text.length) { const ch = text.charCodeAt(pos); pos++; switch (ch) { case CharacterCodes.carriageReturn: if (text.charCodeAt(pos) === CharacterCodes.lineFeed) { pos++; } // falls through case CharacterCodes.lineFeed: result.push(lineStart); lineStart = pos; break; default: if (ch > CharacterCodes.maxAsciiCharacter && isLineBreak(ch)) { result.push(lineStart); lineStart = pos; } break; } } result.push(lineStart); return result; } export function getPositionOfLineAndCharacter(sourceFile: SourceFileLike, line: number, character: number): number; /* @internal */ export function getPositionOfLineAndCharacter(sourceFile: SourceFileLike, line: number, character: number, allowEdits?: true): number; // eslint-disable-line @typescript-eslint/unified-signatures export function getPositionOfLineAndCharacter(sourceFile: SourceFileLike, line: number, character: number, allowEdits?: true): number { return sourceFile.getPositionOfLineAndCharacter ? sourceFile.getPositionOfLineAndCharacter(line, character, allowEdits) : computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character, sourceFile.text, allowEdits); } /* @internal */ export function computePositionOfLineAndCharacter(lineStarts: readonly number[], line: number, character: number, debugText?: string, allowEdits?: true): number { if (line < 0 || line >= lineStarts.length) { if (allowEdits) { // Clamp line to nearest allowable value line = line < 0 ? 0 : line >= lineStarts.length ? lineStarts.length - 1 : line; } else { Debug.fail(`Bad line number. Line: ${line}, lineStarts.length: ${lineStarts.length} , line map is correct? ${debugText !== undefined ? arraysEqual(lineStarts, computeLineStarts(debugText)) : "unknown"}`); } } const res = lineStarts[line] + character; if (allowEdits) { // Clamp to nearest allowable values to allow the underlying to be edited without crashing (accuracy is lost, instead) // TODO: Somehow track edits between file as it was during the creation of sourcemap we have and the current file and // apply them to the computed position to improve accuracy return res > lineStarts[line + 1] ? lineStarts[line + 1] : typeof debugText === "string" && res > debugText.length ? debugText.length : res; } if (line < lineStarts.length - 1) { Debug.assert(res < lineStarts[line + 1]); } else if (debugText !== undefined) { Debug.assert(res <= debugText.length); // Allow single character overflow for trailing newline } return res; } /* @internal */ export function getLineStarts(sourceFile: SourceFileLike): readonly number[] { return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text)); } /* @internal */ export function computeLineAndCharacterOfPosition(lineStarts: readonly number[], position: number): LineAndCharacter { const lineNumber = computeLineOfPosition(lineStarts, position); return { line: lineNumber, character: position - lineStarts[lineNumber] }; } /** * @internal * We assume the first line starts at position 0 and 'position' is non-negative. */ export function computeLineOfPosition(lineStarts: readonly number[], position: number, lowerBound?: number) { let lineNumber = binarySearch(lineStarts, position, identity, compareValues, lowerBound); if (lineNumber < 0) { // If the actual position was not found, // the binary search returns the 2's-complement of the next line start // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20 // then the search will return -2. // // We want the index of the previous line start, so we subtract 1. // Review 2's-complement if this is confusing. lineNumber = ~lineNumber - 1; Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file"); } return lineNumber; } /** @internal */ export function getLinesBetweenPositions(sourceFile: SourceFileLike, pos1: number, pos2: number) { if (pos1 === pos2) return 0; const lineStarts = getLineStarts(sourceFile); const lower = Math.min(pos1, pos2); const isNegative = lower === pos2; const upper = isNegative ? pos1 : pos2; const lowerLine = computeLineOfPosition(lineStarts, lower); const upperLine = computeLineOfPosition(lineStarts, upper, lowerLine); return isNegative ? lowerLine - upperLine : upperLine - lowerLine; } export function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter { return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position); } export function isWhiteSpaceLike(ch: number): boolean { return isWhiteSpaceSingleLine(ch) || isLineBreak(ch); } /** Does not include line breaks. For that, see isWhiteSpaceLike. */ export function isWhiteSpaceSingleLine(ch: number): boolean { // Note: nextLine is in the Zs space, and should be considered to be a whitespace. // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript. return ch === CharacterCodes.space || ch === CharacterCodes.tab || ch === CharacterCodes.verticalTab || ch === CharacterCodes.formFeed || ch === CharacterCodes.nonBreakingSpace || ch === CharacterCodes.nextLine || ch === CharacterCodes.ogham || ch >= CharacterCodes.enQuad && ch <= CharacterCodes.zeroWidthSpace || ch === CharacterCodes.narrowNoBreakSpace || ch === CharacterCodes.mathematicalSpace || ch === CharacterCodes.ideographicSpace || ch === CharacterCodes.byteOrderMark; } export function isLineBreak(ch: number): boolean { // ES5 7.3: // The ECMAScript line terminator characters are listed in Table 3. // Table 3: Line Terminator Characters // Code Unit Value Name Formal Name // \u000A Line Feed // \u000D Carriage Return // \u2028 Line separator // \u2029 Paragraph separator // Only the characters in Table 3 are treated as line terminators. Other new line or line // breaking characters are treated as white space but not as line terminators. return ch === CharacterCodes.lineFeed || ch === CharacterCodes.carriageReturn || ch === CharacterCodes.lineSeparator || ch === CharacterCodes.paragraphSeparator; } function isDigit(ch: number): boolean { return ch >= CharacterCodes._0 && ch <= CharacterCodes._9; } function isHexDigit(ch: number): boolean { return isDigit(ch) || ch >= CharacterCodes.A && ch <= CharacterCodes.F || ch >= CharacterCodes.a && ch <= CharacterCodes.f; } function isCodePoint(code: number): boolean { return code <= 0x10FFFF; } /* @internal */ export function isOctalDigit(ch: number): boolean { return ch >= CharacterCodes._0 && ch <= CharacterCodes._7; } export function couldStartTrivia(text: string, pos: number): boolean { // Keep in sync with skipTrivia const ch = text.charCodeAt(pos); switch (ch) { case CharacterCodes.carriageReturn: case CharacterCodes.lineFeed: case CharacterCodes.tab: case CharacterCodes.verticalTab: case CharacterCodes.formFeed: case CharacterCodes.space: case CharacterCodes.slash: // starts of normal trivia // falls through case CharacterCodes.lessThan: case CharacterCodes.bar: case CharacterCodes.equals: case CharacterCodes.greaterThan: // Starts of conflict marker trivia return true; case CharacterCodes.hash: // Only if its the beginning can we have #! trivia return pos === 0; default: return ch > CharacterCodes.maxAsciiCharacter; } } /* @internal */ export function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments = false): number { if (positionIsSynthesized(pos)) { return pos; } // Keep in sync with couldStartTrivia while (true) { const ch = text.charCodeAt(pos); switch (ch) { case CharacterCodes.carriageReturn: if (text.charCodeAt(pos + 1) === CharacterCodes.lineFeed) { pos++; } // falls through case CharacterCodes.lineFeed: pos++; if (stopAfterLineBreak) { return pos; } continue; case CharacterCodes.tab: case CharacterCodes.verticalTab: case CharacterCodes.formFeed: case CharacterCodes.space: pos++; continue; case CharacterCodes.slash: if (stopAtComments) { break; } if (text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; while (pos < text.length) { if (isLineBreak(text.charCodeAt(pos))) { break; } pos++; } continue; } if (text.charCodeAt(pos + 1) === CharacterCodes.asterisk) { pos += 2; while (pos < text.length) { if (text.charCodeAt(pos) === CharacterCodes.asterisk && text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; break; } pos++; } continue; } break; case CharacterCodes.lessThan: case CharacterCodes.bar: case CharacterCodes.equals: case CharacterCodes.greaterThan: if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos); continue; } break; case CharacterCodes.hash: if (pos === 0 && isShebangTrivia(text, pos)) { pos = scanShebangTrivia(text, pos); continue; } break; default: if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpaceLike(ch))) { pos++; continue; } break; } return pos; } } // All conflict markers consist of the same character repeated seven times. If it is // a <<<<<<< or >>>>>>> marker then it is also followed by a space. const mergeConflictMarkerLength = "<<<<<<<".length; function isConflictMarkerTrivia(text: string, pos: number) { Debug.assert(pos >= 0); // Conflict markers must be at the start of a line. if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) { const ch = text.charCodeAt(pos); if ((pos + mergeConflictMarkerLength) < text.length) { for (let i = 0; i < mergeConflictMarkerLength; i++) { if (text.charCodeAt(pos + i) !== ch) { return false; } } return ch === CharacterCodes.equals || text.charCodeAt(pos + mergeConflictMarkerLength) === CharacterCodes.space; } } return false; } function scanConflictMarkerTrivia(text: string, pos: number, error?: (diag: DiagnosticMessage, pos?: number, len?: number) => void) { if (error) { error(Diagnostics.Merge_conflict_marker_encountered, pos, mergeConflictMarkerLength); } const ch = text.charCodeAt(pos); const len = text.length; if (ch === CharacterCodes.lessThan || ch === CharacterCodes.greaterThan) { while (pos < len && !isLineBreak(text.charCodeAt(pos))) { pos++; } } else { Debug.assert(ch === CharacterCodes.bar || ch === CharacterCodes.equals); // Consume everything from the start of a ||||||| or ======= marker to the start // of the next ======= or >>>>>>> marker. while (pos < len) { const currentChar = text.charCodeAt(pos); if ((currentChar === CharacterCodes.equals || currentChar === CharacterCodes.greaterThan) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) { break; } pos++; } } return pos; } const shebangTriviaRegex = /^#!.*/; /*@internal*/ export function isShebangTrivia(text: string, pos: number) { // Shebangs check must only be done at the start of the file Debug.assert(pos === 0); return shebangTriviaRegex.test(text); } /*@internal*/ export function scanShebangTrivia(text: string, pos: number) { const shebang = shebangTriviaRegex.exec(text)![0]; pos = pos + shebang.length; return pos; } /** * Invokes a callback for each comment range following the provided position. * * Single-line comment ranges include the leading double-slash characters but not the ending * line break. Multi-line comment ranges include the leading slash-asterisk and trailing * asterisk-slash characters. * * @param reduce If true, accumulates the result of calling the callback in a fashion similar * to reduceLeft. If false, iteration stops when the callback returns a truthy value. * @param text The source text to scan. * @param pos The position at which to start scanning. * @param trailing If false, whitespace is skipped until the first line break and comments * between that location and the next token are returned. If true, comments occurring * between the given position and the next line break are returned. * @param cb The callback to execute as each comment range is encountered. * @param state A state value to pass to each iteration of the callback. * @param initial An initial value to pass when accumulating results (when "reduce" is true). * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy * return value of the callback. */ function iterateCommentRanges(reduce: boolean, text: string, pos: number, trailing: boolean, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U | undefined) => U, state: T, initial?: U): U | undefined { let pendingPos!: number; let pendingEnd!: number; let pendingKind!: CommentKind; let pendingHasTrailingNewLine!: boolean; let hasPendingCommentRange = false; let collecting = trailing; let accumulator = initial; if (pos === 0) { collecting = true; const shebang = getShebang(text); if (shebang) { pos = shebang.length; } } scan: while (pos >= 0 && pos < text.length) { const ch = text.charCodeAt(pos); switch (ch) { case CharacterCodes.carriageReturn: if (text.charCodeAt(pos + 1) === CharacterCodes.lineFeed) { pos++; } // falls through case CharacterCodes.lineFeed: pos++; if (trailing) { break scan; } collecting = true; if (hasPendingCommentRange) { pendingHasTrailingNewLine = true; } continue; case CharacterCodes.tab: case CharacterCodes.verticalTab: case CharacterCodes.formFeed: case CharacterCodes.space: pos++; continue; case CharacterCodes.slash: const nextChar = text.charCodeAt(pos + 1); let hasTrailingNewLine = false; if (nextChar === CharacterCodes.slash || nextChar === CharacterCodes.asterisk) { const kind = nextChar === CharacterCodes.slash ? SyntaxKind.SingleLineCommentTrivia : SyntaxKind.MultiLineCommentTrivia; const startPos = pos; pos += 2; if (nextChar === CharacterCodes.slash) { while (pos < text.length) { if (isLineBreak(text.charCodeAt(pos))) { hasTrailingNewLine = true; break; } pos++; } } else { while (pos < text.length) { if (text.charCodeAt(pos) === CharacterCodes.asterisk && text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; break; } pos++; } } if (collecting) { if (hasPendingCommentRange) { accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator); if (!reduce && accumulator) { // If we are not reducing and we have a truthy result, return it. return accumulator; } } pendingPos = startPos; pendingEnd = pos; pendingKind = kind; pendingHasTrailingNewLine = hasTrailingNewLine; hasPendingCommentRange = true; } continue; } break scan; default: if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpaceLike(ch))) { if (hasPendingCommentRange && isLineBreak(ch)) { pendingHasTrailingNewLine = true; } pos++; continue; } break scan; } } if (hasPendingCommentRange) { accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator); } return accumulator; } export function forEachLeadingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined; export function forEachLeadingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined; export function forEachLeadingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined { return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state); } export function forEachTrailingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined; export function forEachTrailingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined; export function forEachTrailingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined { return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state); } export function reduceEachLeadingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) { return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial); } export function reduceEachTrailingCommentRange(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) { return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial); } function appendCommentRange(pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, _state: any, comments: CommentRange[]) { if (!comments) { comments = []; } comments.push({ kind, pos, end, hasTrailingNewLine }); return comments; } export function getLeadingCommentRanges(text: string, pos: number): CommentRange[] | undefined { return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined); } export function getTrailingCommentRanges(text: string, pos: number): CommentRange[] | undefined { return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined); } /** Optionally, get the shebang */ export function getShebang(text: string): string | undefined { const match = shebangTriviaRegex.exec(text); if (match) { return match[0]; } } export function isIdentifierStart(ch: number, languageVersion: ScriptTarget | undefined): boolean { return ch >= CharacterCodes.A && ch <= CharacterCodes.Z || ch >= CharacterCodes.a && ch <= CharacterCodes.z || ch === CharacterCodes.$ || ch === CharacterCodes._ || ch > CharacterCodes.maxAsciiCharacter && isUnicodeIdentifierStart(ch, languageVersion); } export function isIdentifierPart(ch: number, languageVersion: ScriptTarget | undefined, identifierVariant?: LanguageVariant): boolean { return ch >= CharacterCodes.A && ch <= CharacterCodes.Z || ch >= CharacterCodes.a && ch <= CharacterCodes.z || ch >= CharacterCodes._0 && ch <= CharacterCodes._9 || ch === CharacterCodes.$ || ch === CharacterCodes._ || // "-" and ":" are valid in JSX Identifiers (identifierVariant === LanguageVariant.JSX ? (ch === CharacterCodes.minus || ch === CharacterCodes.colon) : false) || ch > CharacterCodes.maxAsciiCharacter && isUnicodeIdentifierPart(ch, languageVersion); } /* @internal */ export function isIdentifierText(name: string, languageVersion: ScriptTarget | undefined, identifierVariant?: LanguageVariant): boolean { let ch = codePointAt(name, 0); if (!isIdentifierStart(ch, languageVersion)) { return false; } for (let i = charSize(ch); i < name.length; i += charSize(ch)) { if (!isIdentifierPart(ch = codePointAt(name, i), languageVersion, identifierVariant)) { return false; } } return true; } // Creates a scanner over a (possibly unspecified) range of a piece of text. export function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant = LanguageVariant.Standard, textInitial?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner { let text = textInitial!; // Current position (end position of text of current token) let pos: number; // end of text let end: number; // Start position of whitespace before current token let startPos: number; // Start position of text of current token let tokenPos: number; let token: SyntaxKind; let tokenValue!: string; let tokenFlags: TokenFlags; let commentDirectives: CommentDirective[] | undefined; let inJSDocType = 0; setText(text, start, length); const scanner: Scanner = { getStartPos: () => startPos, getTextPos: () => pos, getToken: () => token, getTokenPos: () => tokenPos, getTokenText: () => text.substring(tokenPos, pos), getTokenValue: () => tokenValue, hasUnicodeEscape: () => (tokenFlags & TokenFlags.UnicodeEscape) !== 0, hasExtendedUnicodeEscape: () => (tokenFlags & TokenFlags.ExtendedUnicodeEscape) !== 0, hasPrecedingLineBreak: () => (tokenFlags & TokenFlags.PrecedingLineBreak) !== 0, hasPrecedingJSDocComment: () => (tokenFlags & TokenFlags.PrecedingJSDocComment) !== 0, isIdentifier: () => token === SyntaxKind.Identifier || token > SyntaxKind.LastReservedWord, isReservedWord: () => token >= SyntaxKind.FirstReservedWord && token <= SyntaxKind.LastReservedWord, isUnterminated: () => (tokenFlags & TokenFlags.Unterminated) !== 0, getCommentDirectives: () => commentDirectives, getNumericLiteralFlags: () => tokenFlags & TokenFlags.NumericLiteralFlags, getTokenFlags: () => tokenFlags, reScanGreaterToken, reScanAsteriskEqualsToken, reScanSlashToken, reScanTemplateToken, reScanTemplateHeadOrNoSubstitutionTemplate, scanJsxIdentifier, scanJsxAttributeValue, reScanJsxAttributeValue, reScanJsxToken, reScanLessThanToken, reScanQuestionToken, scanJsxToken, scanJsDocToken, scan, getText, clearCommentDirectives, setText, setScriptTarget, setLanguageVariant, setOnError, setTextPos, setInJSDocType, tryScan, lookAhead, scanRange, }; if (Debug.isDebugging) { Object.defineProperty(scanner, "__debugShowCurrentPositionInText", { get: () => { const text = scanner.getText(); return text.slice(0, scanner.getStartPos()) + "║" + text.slice(scanner.getStartPos()); }, }); } return scanner; function error(message: DiagnosticMessage): void; function error(message: DiagnosticMessage, errPos: number, length: number): void; function error(message: DiagnosticMessage, errPos: number = pos, length?: number): void { if (onError) { const oldPos = pos; pos = errPos; onError(message, length || 0); pos = oldPos; } } function scanNumberFragment(): string { let start = pos; let allowSeparator = false; let isPreviousTokenSeparator = false; let result = ""; while (true) { const ch = text.charCodeAt(pos); if (ch === CharacterCodes._) { tokenFlags |= TokenFlags.ContainsSeparator; if (allowSeparator) { allowSeparator = false; isPreviousTokenSeparator = true; result += text.substring(start, pos); } else if (isPreviousTokenSeparator) { error(Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1); } else { error(Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1); } pos++; start = pos; continue; } if (isDigit(ch)) { allowSeparator = true; isPreviousTokenSeparator = false; pos++; continue; } break; } if (text.charCodeAt(pos - 1) === CharacterCodes._) { error(Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1); } return result + text.substring(start, pos); } function scanNumber(): { type: SyntaxKind, value: string } { const start = pos; const mainFragment = scanNumberFragment(); let decimalFragment: string | undefined; let scientificFragment: string | undefined; if (text.charCodeAt(pos) === CharacterCodes.dot) { pos++; decimalFragment = scanNumberFragment(); } let end = pos; if (text.charCodeAt(pos) === CharacterCodes.E || text.charCodeAt(pos) === CharacterCodes.e) { pos++; tokenFlags |= TokenFlags.Scientific; if (text.charCodeAt(pos) === CharacterCodes.plus || text.charCodeAt(pos) === CharacterCodes.minus) pos++; const preNumericPart = pos; const finalFragment = scanNumberFragment(); if (!finalFragment) { error(Diagnostics.Digit_expected); } else { scientificFragment = text.substring(end, preNumericPart) + finalFragment; end = pos; } } let result: string; if (tokenFlags & TokenFlags.ContainsSeparator) { result = mainFragment; if (decimalFragment) { result += "." + decimalFragment; } if (scientificFragment) { result += scientificFragment; } } else { result = text.substring(start, end); // No need to use all the fragments; no _ removal needed } if (decimalFragment !== undefined || tokenFlags & TokenFlags.Scientific) { checkForIdentifierStartAfterNumericLiteral(start, decimalFragment === undefined && !!(tokenFlags & TokenFlags.Scientific)); return { type: SyntaxKind.NumericLiteral, value: "" + +result // if value is not an integer, it can be safely coerced to a number }; } else { tokenValue = result; const type = checkBigIntSuffix(); // if value is an integer, check whether it is a bigint checkForIdentifierStartAfterNumericLiteral(start); return { type, value: tokenValue }; } } function checkForIdentifierStartAfterNumericLiteral(numericStart: number, isScientific?: boolean) { if (!isIdentifierStart(codePointAt(text, pos), languageVersion)) { return; } const identifierStart = pos; const { length } = scanIdentifierParts(); if (length === 1 && text[identifierStart] === "n") { if (isScientific) { error(Diagnostics.A_bigint_literal_cannot_use_exponential_notation, numericStart, identifierStart - numericStart + 1); } else { error(Diagnostics.A_bigint_literal_must_be_an_integer, numericStart, identifierStart - numericStart + 1); } } else { error(Diagnostics.An_identifier_or_keyword_cannot_immediately_follow_a_numeric_literal, identifierStart, length); pos = identifierStart; } } function scanOctalDigits(): number { const start = pos; while (isOctalDigit(text.charCodeAt(pos))) { pos++; } return +(text.substring(start, pos)); } /** * Scans the given number of hexadecimal digits in the text, * returning -1 if the given number is unavailable. */ function scanExactNumberOfHexDigits(count: number, canHaveSeparators: boolean): number { const valueString = scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false, canHaveSeparators); return valueString ? parseInt(valueString, 16) : -1; } /** * Scans as many hexadecimal digits as are available in the text, * returning "" if the given number of digits was unavailable. */ function scanMinimumNumberOfHexDigits(count: number, canHaveSeparators: boolean): string { return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true, canHaveSeparators); } function scanHexDigits(minCount: number, scanAsManyAsPossible: boolean, canHaveSeparators: boolean): string { let valueChars: number[] = []; let allowSeparator = false; let isPreviousTokenSeparator = false; while (valueChars.length < minCount || scanAsManyAsPossible) { let ch = text.charCodeAt(pos); if (canHaveSeparators && ch === CharacterCodes._) { tokenFlags |= TokenFlags.ContainsSeparator; if (allowSeparator) { allowSeparator = false; isPreviousTokenSeparator = true; } else if (isPreviousTokenSeparator) { error(Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1); } else { error(Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1); } pos++; continue; } allowSeparator = canHaveSeparators; if (ch >= CharacterCodes.A && ch <= CharacterCodes.F) { ch += CharacterCodes.a - CharacterCodes.A; // standardize hex literals to lowercase } else if (!((ch >= CharacterCodes._0 && ch <= CharacterCodes._9) || (ch >= CharacterCodes.a && ch <= CharacterCodes.f) )) { break; } valueChars.push(ch); pos++; isPreviousTokenSeparator = false; } if (valueChars.length < minCount) { valueChars = []; } if (text.charCodeAt(pos - 1) === CharacterCodes._) { error(Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1); } return String.fromCharCode(...valueChars); } function scanString(jsxAttributeString = false): string { const quote = text.charCodeAt(pos); pos++; let result = ""; let start = pos; while (true) { if (pos >= end) { result += text.substring(start, pos); tokenFlags |= TokenFlags.Unterminated; error(Diagnostics.Unterminated_string_literal); break; } const ch = text.charCodeAt(pos); if (ch === quote) { result += text.substring(start, pos); pos++; break; } if (ch === CharacterCodes.backslash && !jsxAttributeString) { result += text.substring(start, pos); result += scanEscapeSequence(); start = pos; continue; } if (isLineBreak(ch) && !jsxAttributeString) { result += text.substring(start, pos); tokenFlags |= TokenFlags.Unterminated; error(Diagnostics.Unterminated_string_literal); break; } pos++; } return result; } /** * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or * a literal component of a TemplateExpression. */ function scanTemplateAndSetTokenValue(isTaggedTemplate: boolean): SyntaxKind { const startedWithBacktick = text.charCodeAt(pos) === CharacterCodes.backtick; pos++; let start = pos; let contents = ""; let resultingToken: SyntaxKind; while (true) { if (pos >= end) { contents += text.substring(start, pos); tokenFlags |= TokenFlags.Unterminated; error(Diagnostics.Unterminated_template_literal); resultingToken = startedWithBacktick ? SyntaxKind.NoSubstitutionTemplateLiteral : SyntaxKind.TemplateTail; break; } const currChar = text.charCodeAt(pos); // '`' if (currChar === CharacterCodes.backtick) { contents += text.substring(start, pos); pos++; resultingToken = startedWithBacktick ? SyntaxKind.NoSubstitutionTemplateLiteral : SyntaxKind.TemplateTail; break; } // '${' if (currChar === CharacterCodes.$ && pos + 1 < end && text.charCodeAt(pos + 1) === CharacterCodes.openBrace) { contents += text.substring(start, pos); pos += 2; resultingToken = startedWithBacktick ? SyntaxKind.TemplateHead : SyntaxKind.TemplateMiddle; break; } // Escape character if (currChar === CharacterCodes.backslash) { contents += text.substring(start, pos); contents += scanEscapeSequence(isTaggedTemplate); start = pos; continue; } // Speculated ECMAScript 6 Spec 11.8.6.1: // and LineTerminatorSequences are normalized to for Template Values if (currChar === CharacterCodes.carriageReturn) { contents += text.substring(start, pos); pos++; if (pos < end && text.charCodeAt(pos) === CharacterCodes.lineFeed) { pos++; } contents += "\n"; start = pos; continue; } pos++; } Debug.assert(resultingToken !== undefined); tokenValue = contents; return resultingToken; } function scanEscapeSequence(isTaggedTemplate?: boolean): string { const start = pos; pos++; if (pos >= end) { error(Diagnostics.Unexpected_end_of_text); return ""; } const ch = text.charCodeAt(pos); pos++; switch (ch) { case CharacterCodes._0: // '\01' if (isTaggedTemplate && pos < end && isDigit(text.charCodeAt(pos))) { pos++; tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } return "\0"; case CharacterCodes.b: return "\b"; case CharacterCodes.t: return "\t"; case CharacterCodes.n: return "\n"; case CharacterCodes.v: return "\v"; case CharacterCodes.f: return "\f"; case CharacterCodes.r: return "\r"; case CharacterCodes.singleQuote: return "\'"; case CharacterCodes.doubleQuote: return "\""; case CharacterCodes.u: if (isTaggedTemplate) { // '\u' or '\u0' or '\u00' or '\u000' for (let escapePos = pos; escapePos < pos + 4; escapePos++) { if (escapePos < end && !isHexDigit(text.charCodeAt(escapePos)) && text.charCodeAt(escapePos) !== CharacterCodes.openBrace) { pos = escapePos; tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } } } // '\u{DDDDDDDD}' if (pos < end && text.charCodeAt(pos) === CharacterCodes.openBrace) { pos++; // '\u{' if (isTaggedTemplate && !isHexDigit(text.charCodeAt(pos))) { tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } if (isTaggedTemplate) { const savePos = pos; const escapedValueString = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ false); const escapedValue = escapedValueString ? parseInt(escapedValueString, 16) : -1; // '\u{Not Code Point' or '\u{CodePoint' if (!isCodePoint(escapedValue) || text.charCodeAt(pos) !== CharacterCodes.closeBrace) { tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } else { pos = savePos; } } tokenFlags |= TokenFlags.ExtendedUnicodeEscape; return scanExtendedUnicodeEscape(); } tokenFlags |= TokenFlags.UnicodeEscape; // '\uDDDD' return scanHexadecimalEscape(/*numDigits*/ 4); case CharacterCodes.x: if (isTaggedTemplate) { if (!isHexDigit(text.charCodeAt(pos))) { tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } else if (!isHexDigit(text.charCodeAt(pos + 1))) { pos++; tokenFlags |= TokenFlags.ContainsInvalidEscape; return text.substring(start, pos); } } // '\xDD' return scanHexadecimalEscape(/*numDigits*/ 2); // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence), // the line terminator is interpreted to be "the empty code unit sequence". case CharacterCodes.carriageReturn: if (pos < end && text.charCodeAt(pos) === CharacterCodes.lineFeed) { pos++; } // falls through case CharacterCodes.lineFeed: case CharacterCodes.lineSeparator: case CharacterCodes.paragraphSeparator: return ""; default: return String.fromCharCode(ch); } } function scanHexadecimalEscape(numDigits: number): string { const escapedValue = scanExactNumberOfHexDigits(numDigits, /*canHaveSeparators*/ false); if (escapedValue >= 0) { return String.fromCharCode(escapedValue); } else { error(Diagnostics.Hexadecimal_digit_expected); return ""; } } function scanExtendedUnicodeEscape(): string { const escapedValueString = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ false); const escapedValue = escapedValueString ? parseInt(escapedValueString, 16) : -1; let isInvalidExtendedEscape = false; // Validate the value of the digit if (escapedValue < 0) { error(Diagnostics.Hexadecimal_digit_expected); isInvalidExtendedEscape = true; } else if (escapedValue > 0x10FFFF) { error(Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive); isInvalidExtendedEscape = true; } if (pos >= end) { error(Diagnostics.Unexpected_end_of_text); isInvalidExtendedEscape = true; } else if (text.charCodeAt(pos) === CharacterCodes.closeBrace) { // Only swallow the following character up if it's a '}'. pos++; } else { error(Diagnostics.Unterminated_Unicode_escape_sequence); isInvalidExtendedEscape = true; } if (isInvalidExtendedEscape) { return ""; } return utf16EncodeAsString(escapedValue); } // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX' // and return code point value if valid Unicode escape is found. Otherwise return -1. function peekUnicodeEscape(): number { if (pos + 5 < end && text.charCodeAt(pos + 1) === CharacterCodes.u) { const start = pos; pos += 2; const value = scanExactNumberOfHexDigits(4, /*canHaveSeparators*/ false); pos = start; return value; } return -1; } function peekExtendedUnicodeEscape(): number { if (languageVersion >= ScriptTarget.ES2015 && codePointAt(text, pos + 1) === CharacterCodes.u && codePointAt(text, pos + 2) === CharacterCodes.openBrace) { const start = pos; pos += 3; const escapedValueString = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ false); const escapedValue = escapedValueString ? parseInt(escapedValueString, 16) : -1; pos = start; return escapedValue; } return -1; } function scanIdentifierParts(): string { let result = ""; let start = pos; while (pos < end) { let ch = codePointAt(text, pos); if (isIdentifierPart(ch, languageVersion)) { pos += charSize(ch); } else if (ch === CharacterCodes.backslash) { ch = peekExtendedUnicodeEscape(); if (ch >= 0 && isIdentifierPart(ch, languageVersion)) { pos += 3; tokenFlags |= TokenFlags.ExtendedUnicodeEscape; result += scanExtendedUnicodeEscape(); start = pos; continue; } ch = peekUnicodeEscape(); if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) { break; } tokenFlags |= TokenFlags.UnicodeEscape; result += text.substring(start, pos); result += utf16EncodeAsString(ch); // Valid Unicode escape is always six characters pos += 6; start = pos; } else { break; } } result += text.substring(start, pos); return result; } function getIdentifierToken(): SyntaxKind.Identifier | KeywordSyntaxKind { // Reserved words are between 2 and 11 characters long and start with a lowercase letter const len = tokenValue.length; if (len >= 2 && len <= 11) { const ch = tokenValue.charCodeAt(0); if (ch >= CharacterCodes.a && ch <= CharacterCodes.z) { const keyword = textToKeyword.get(tokenValue); if (keyword !== undefined) { return token = keyword; } } } return token = SyntaxKind.Identifier; } function scanBinaryOrOctalDigits(base: 2 | 8): string { let value = ""; // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b. // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O. let separatorAllowed = false; let isPreviousTokenSeparator = false; while (true) { const ch = text.charCodeAt(pos); // Numeric separators are allowed anywhere within a numeric literal, except not at the beginning, or following another separator if (ch === CharacterCodes._) { tokenFlags |= TokenFlags.ContainsSeparator; if (separatorAllowed) { separatorAllowed = false; isPreviousTokenSeparator = true; } else if (isPreviousTokenSeparator) { error(Diagnostics.Multiple_consecutive_numeric_separators_are_not_permitted, pos, 1); } else { error(Diagnostics.Numeric_separators_are_not_allowed_here, pos, 1); } pos++; continue; } separatorAllowed = true; if (!isDigit(ch) || ch - CharacterCodes._0 >= base) { break; } value += text[pos]; pos++; isPreviousTokenSeparator = false; } if (text.charCodeAt(pos - 1) === CharacterCodes._) { // Literal ends with underscore - not allowed error(Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1); } return value; } function checkBigIntSuffix(): SyntaxKind { if (text.charCodeAt(pos) === CharacterCodes.n) { tokenValue += "n"; // Use base 10 instead of base 2 or base 8 for shorter literals if (tokenFlags & TokenFlags.BinaryOrOctalSpecifier) { tokenValue = parsePseudoBigInt(tokenValue) + "n"; } pos++; return SyntaxKind.BigIntLiteral; } else { // not a bigint, so can convert to number in simplified form // Number() may not support 0b or 0o, so use parseInt() instead const numericValue = tokenFlags & TokenFlags.BinarySpecifier ? parseInt(tokenValue.slice(2), 2) // skip "0b" : tokenFlags & TokenFlags.OctalSpecifier ? parseInt(tokenValue.slice(2), 8) // skip "0o" : +tokenValue; tokenValue = "" + numericValue; return SyntaxKind.NumericLiteral; } } function scan(): SyntaxKind { startPos = pos; tokenFlags = TokenFlags.None; let asteriskSeen = false; while (true) { tokenPos = pos; if (pos >= end) { return token = SyntaxKind.EndOfFileToken; } let ch = codePointAt(text, pos); // Special handling for shebang if (ch === CharacterCodes.hash && pos === 0 && isShebangTrivia(text, pos)) { pos = scanShebangTrivia(text, pos); if (skipTrivia) { continue; } else { return token = SyntaxKind.ShebangTrivia; } } switch (ch) { case CharacterCodes.lineFeed: case CharacterCodes.carriageReturn: tokenFlags |= TokenFlags.PrecedingLineBreak; if (skipTrivia) { pos++; continue; } else { if (ch === CharacterCodes.carriageReturn && pos + 1 < end && text.charCodeAt(pos + 1) === CharacterCodes.lineFeed) { // consume both CR and LF pos += 2; } else { pos++; } return token = SyntaxKind.NewLineTrivia; } case CharacterCodes.tab: case CharacterCodes.verticalTab: case CharacterCodes.formFeed: case CharacterCodes.space: case CharacterCodes.nonBreakingSpace: case CharacterCodes.ogham: case CharacterCodes.enQuad: case CharacterCodes.emQuad: case CharacterCodes.enSpace: case CharacterCodes.emSpace: case CharacterCodes.threePerEmSpace: case CharacterCodes.fourPerEmSpace: case CharacterCodes.sixPerEmSpace: case CharacterCodes.figureSpace: case CharacterCodes.punctuationSpace: case CharacterCodes.thinSpace: case CharacterCodes.hairSpace: case CharacterCodes.zeroWidthSpace: case CharacterCodes.narrowNoBreakSpace: case CharacterCodes.mathematicalSpace: case CharacterCodes.ideographicSpace: case CharacterCodes.byteOrderMark: if (skipTrivia) { pos++; continue; } else { while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) { pos++; } return token = SyntaxKind.WhitespaceTrivia; } case CharacterCodes.exclamation: if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.ExclamationEqualsEqualsToken; } return pos += 2, token = SyntaxKind.ExclamationEqualsToken; } pos++; return token = SyntaxKind.ExclamationToken; case CharacterCodes.doubleQuote: case CharacterCodes.singleQuote: tokenValue = scanString(); return token = SyntaxKind.StringLiteral; case CharacterCodes.backtick: return token = scanTemplateAndSetTokenValue(/* isTaggedTemplate */ false); case CharacterCodes.percent: if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.PercentEqualsToken; } pos++; return token = SyntaxKind.PercentToken; case CharacterCodes.ampersand: if (text.charCodeAt(pos + 1) === CharacterCodes.ampersand) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.AmpersandAmpersandEqualsToken; } return pos += 2, token = SyntaxKind.AmpersandAmpersandToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.AmpersandEqualsToken; } pos++; return token = SyntaxKind.AmpersandToken; case CharacterCodes.openParen: pos++; return token = SyntaxKind.OpenParenToken; case CharacterCodes.closeParen: pos++; return token = SyntaxKind.CloseParenToken; case CharacterCodes.asterisk: if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.AsteriskEqualsToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.asterisk) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.AsteriskAsteriskEqualsToken; } return pos += 2, token = SyntaxKind.AsteriskAsteriskToken; } pos++; if (inJSDocType && !asteriskSeen && (tokenFlags & TokenFlags.PrecedingLineBreak)) { // decoration at the start of a JSDoc comment line asteriskSeen = true; continue; } return token = SyntaxKind.AsteriskToken; case CharacterCodes.plus: if (text.charCodeAt(pos + 1) === CharacterCodes.plus) { return pos += 2, token = SyntaxKind.PlusPlusToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.PlusEqualsToken; } pos++; return token = SyntaxKind.PlusToken; case CharacterCodes.comma: pos++; return token = SyntaxKind.CommaToken; case CharacterCodes.minus: if (text.charCodeAt(pos + 1) === CharacterCodes.minus) { return pos += 2, token = SyntaxKind.MinusMinusToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.MinusEqualsToken; } pos++; return token = SyntaxKind.MinusToken; case CharacterCodes.dot: if (isDigit(text.charCodeAt(pos + 1))) { tokenValue = scanNumber().value; return token = SyntaxKind.NumericLiteral; } if (text.charCodeAt(pos + 1) === CharacterCodes.dot && text.charCodeAt(pos + 2) === CharacterCodes.dot) { return pos += 3, token = SyntaxKind.DotDotDotToken; } pos++; return token = SyntaxKind.DotToken; case CharacterCodes.slash: // Single-line comment if (text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; while (pos < end) { if (isLineBreak(text.charCodeAt(pos))) { break; } pos++; } commentDirectives = appendIfCommentDirective( commentDirectives, text.slice(tokenPos, pos), commentDirectiveRegExSingleLine, tokenPos, ); if (skipTrivia) { continue; } else { return token = SyntaxKind.SingleLineCommentTrivia; } } // Multi-line comment if (text.charCodeAt(pos + 1) === CharacterCodes.asterisk) { pos += 2; if (text.charCodeAt(pos) === CharacterCodes.asterisk && text.charCodeAt(pos + 1) !== CharacterCodes.slash) { tokenFlags |= TokenFlags.PrecedingJSDocComment; } let commentClosed = false; let lastLineStart = tokenPos; while (pos < end) { const ch = text.charCodeAt(pos); if (ch === CharacterCodes.asterisk && text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; commentClosed = true; break; } pos++; if (isLineBreak(ch)) { lastLineStart = pos; tokenFlags |= TokenFlags.PrecedingLineBreak; } } commentDirectives = appendIfCommentDirective(commentDirectives, text.slice(lastLineStart, pos), commentDirectiveRegExMultiLine, lastLineStart); if (!commentClosed) { error(Diagnostics.Asterisk_Slash_expected); } if (skipTrivia) { continue; } else { if (!commentClosed) { tokenFlags |= TokenFlags.Unterminated; } return token = SyntaxKind.MultiLineCommentTrivia; } } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.SlashEqualsToken; } pos++; return token = SyntaxKind.SlashToken; case CharacterCodes._0: if (pos + 2 < end && (text.charCodeAt(pos + 1) === CharacterCodes.X || text.charCodeAt(pos + 1) === CharacterCodes.x)) { pos += 2; tokenValue = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ true); if (!tokenValue) { error(Diagnostics.Hexadecimal_digit_expected); tokenValue = "0"; } tokenValue = "0x" + tokenValue; tokenFlags |= TokenFlags.HexSpecifier; return token = checkBigIntSuffix(); } else if (pos + 2 < end && (text.charCodeAt(pos + 1) === CharacterCodes.B || text.charCodeAt(pos + 1) === CharacterCodes.b)) { pos += 2; tokenValue = scanBinaryOrOctalDigits(/* base */ 2); if (!tokenValue) { error(Diagnostics.Binary_digit_expected); tokenValue = "0"; } tokenValue = "0b" + tokenValue; tokenFlags |= TokenFlags.BinarySpecifier; return token = checkBigIntSuffix(); } else if (pos + 2 < end && (text.charCodeAt(pos + 1) === CharacterCodes.O || text.charCodeAt(pos + 1) === CharacterCodes.o)) { pos += 2; tokenValue = scanBinaryOrOctalDigits(/* base */ 8); if (!tokenValue) { error(Diagnostics.Octal_digit_expected); tokenValue = "0"; } tokenValue = "0o" + tokenValue; tokenFlags |= TokenFlags.OctalSpecifier; return token = checkBigIntSuffix(); } // Try to parse as an octal if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) { tokenValue = "" + scanOctalDigits(); tokenFlags |= TokenFlags.Octal; return token = SyntaxKind.NumericLiteral; } // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do). // falls through case CharacterCodes._1: case CharacterCodes._2: case CharacterCodes._3: case CharacterCodes._4: case CharacterCodes._5: case CharacterCodes._6: case CharacterCodes._7: case CharacterCodes._8: case CharacterCodes._9: ({ type: token, value: tokenValue } = scanNumber()); return token; case CharacterCodes.colon: pos++; return token = SyntaxKind.ColonToken; case CharacterCodes.semicolon: pos++; return token = SyntaxKind.SemicolonToken; case CharacterCodes.lessThan: if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos, error); if (skipTrivia) { continue; } else { return token = SyntaxKind.ConflictMarkerTrivia; } } if (text.charCodeAt(pos + 1) === CharacterCodes.lessThan) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.LessThanLessThanEqualsToken; } return pos += 2, token = SyntaxKind.LessThanLessThanToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.LessThanEqualsToken; } if (languageVariant === LanguageVariant.JSX && text.charCodeAt(pos + 1) === CharacterCodes.slash && text.charCodeAt(pos + 2) !== CharacterCodes.asterisk) { return pos += 2, token = SyntaxKind.LessThanSlashToken; } pos++; return token = SyntaxKind.LessThanToken; case CharacterCodes.equals: if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos, error); if (skipTrivia) { continue; } else { return token = SyntaxKind.ConflictMarkerTrivia; } } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.EqualsEqualsEqualsToken; } return pos += 2, token = SyntaxKind.EqualsEqualsToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.greaterThan) { return pos += 2, token = SyntaxKind.EqualsGreaterThanToken; } pos++; return token = SyntaxKind.EqualsToken; case CharacterCodes.greaterThan: if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos, error); if (skipTrivia) { continue; } else { return token = SyntaxKind.ConflictMarkerTrivia; } } pos++; return token = SyntaxKind.GreaterThanToken; case CharacterCodes.question: if (text.charCodeAt(pos + 1) === CharacterCodes.dot && !isDigit(text.charCodeAt(pos + 2))) { return pos += 2, token = SyntaxKind.QuestionDotToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.question) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.QuestionQuestionEqualsToken; } return pos += 2, token = SyntaxKind.QuestionQuestionToken; } pos++; return token = SyntaxKind.QuestionToken; case CharacterCodes.openBracket: pos++; return token = SyntaxKind.OpenBracketToken; case CharacterCodes.closeBracket: pos++; return token = SyntaxKind.CloseBracketToken; case CharacterCodes.caret: if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.CaretEqualsToken; } pos++; return token = SyntaxKind.CaretToken; case CharacterCodes.openBrace: pos++; return token = SyntaxKind.OpenBraceToken; case CharacterCodes.bar: if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos, error); if (skipTrivia) { continue; } else { return token = SyntaxKind.ConflictMarkerTrivia; } } if (text.charCodeAt(pos + 1) === CharacterCodes.bar) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.BarBarEqualsToken; } return pos += 2, token = SyntaxKind.BarBarToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.BarEqualsToken; } pos++; return token = SyntaxKind.BarToken; case CharacterCodes.closeBrace: pos++; return token = SyntaxKind.CloseBraceToken; case CharacterCodes.tilde: pos++; return token = SyntaxKind.TildeToken; case CharacterCodes.at: pos++; return token = SyntaxKind.AtToken; case CharacterCodes.backslash: const extendedCookedChar = peekExtendedUnicodeEscape(); if (extendedCookedChar >= 0 && isIdentifierStart(extendedCookedChar, languageVersion)) { pos += 3; tokenFlags |= TokenFlags.ExtendedUnicodeEscape; tokenValue = scanExtendedUnicodeEscape() + scanIdentifierParts(); return token = getIdentifierToken(); } const cookedChar = peekUnicodeEscape(); if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) { pos += 6; tokenFlags |= TokenFlags.UnicodeEscape; tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts(); return token = getIdentifierToken(); } error(Diagnostics.Invalid_character); pos++; return token = SyntaxKind.Unknown; case CharacterCodes.hash: if (pos !== 0 && text[pos + 1] === "!") { error(Diagnostics.can_only_be_used_at_the_start_of_a_file); pos++; return token = SyntaxKind.Unknown; } pos++; if (isIdentifierStart(ch = text.charCodeAt(pos), languageVersion)) { pos++; while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion)) pos++; tokenValue = text.substring(tokenPos, pos); if (ch === CharacterCodes.backslash) { tokenValue += scanIdentifierParts(); } } else { tokenValue = "#"; error(Diagnostics.Invalid_character); } return token = SyntaxKind.PrivateIdentifier; default: if (isIdentifierStart(ch, languageVersion)) { pos += charSize(ch); while (pos < end && isIdentifierPart(ch = codePointAt(text, pos), languageVersion)) pos += charSize(ch); tokenValue = text.substring(tokenPos, pos); if (ch === CharacterCodes.backslash) { tokenValue += scanIdentifierParts(); } return token = getIdentifierToken(); } else if (isWhiteSpaceSingleLine(ch)) { pos += charSize(ch); continue; } else if (isLineBreak(ch)) { tokenFlags |= TokenFlags.PrecedingLineBreak; pos += charSize(ch); continue; } error(Diagnostics.Invalid_character); pos += charSize(ch); return token = SyntaxKind.Unknown; } } } function reScanGreaterToken(): SyntaxKind { if (token === SyntaxKind.GreaterThanToken) { if (text.charCodeAt(pos) === CharacterCodes.greaterThan) { if (text.charCodeAt(pos + 1) === CharacterCodes.greaterThan) { if (text.charCodeAt(pos + 2) === CharacterCodes.equals) { return pos += 3, token = SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken; } return pos += 2, token = SyntaxKind.GreaterThanGreaterThanGreaterThanToken; } if (text.charCodeAt(pos + 1) === CharacterCodes.equals) { return pos += 2, token = SyntaxKind.GreaterThanGreaterThanEqualsToken; } pos++; return token = SyntaxKind.GreaterThanGreaterThanToken; } if (text.charCodeAt(pos) === CharacterCodes.equals) { pos++; return token = SyntaxKind.GreaterThanEqualsToken; } } return token; } function reScanAsteriskEqualsToken(): SyntaxKind { Debug.assert(token === SyntaxKind.AsteriskEqualsToken, "'reScanAsteriskEqualsToken' should only be called on a '*='"); pos = tokenPos + 1; return token = SyntaxKind.EqualsToken; } function reScanSlashToken(): SyntaxKind { if (token === SyntaxKind.SlashToken || token === SyntaxKind.SlashEqualsToken) { let p = tokenPos + 1; let inEscape = false; let inCharacterClass = false; while (true) { // If we reach the end of a file, or hit a newline, then this is an unterminated // regex. Report error and return what we have so far. if (p >= end) { tokenFlags |= TokenFlags.Unterminated; error(Diagnostics.Unterminated_regular_expression_literal); break; } const ch = text.charCodeAt(p); if (isLineBreak(ch)) { tokenFlags |= TokenFlags.Unterminated; error(Diagnostics.Unterminated_regular_expression_literal); break; } if (inEscape) { // Parsing an escape character; // reset the flag and just advance to the next char. inEscape = false; } else if (ch === CharacterCodes.slash && !inCharacterClass) { // A slash within a character class is permissible, // but in general it signals the end of the regexp literal. p++; break; } else if (ch === CharacterCodes.openBracket) { inCharacterClass = true; } else if (ch === CharacterCodes.backslash) { inEscape = true; } else if (ch === CharacterCodes.closeBracket) { inCharacterClass = false; } p++; } while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) { p++; } pos = p; tokenValue = text.substring(tokenPos, pos); token = SyntaxKind.RegularExpressionLiteral; } return token; } function appendIfCommentDirective( commentDirectives: CommentDirective[] | undefined, text: string, commentDirectiveRegEx: RegExp, lineStart: number, ) { const type = getDirectiveFromComment(text, commentDirectiveRegEx); if (type === undefined) { return commentDirectives; } return append( commentDirectives, { range: { pos: lineStart, end: pos }, type, }, ); } function getDirectiveFromComment(text: string, commentDirectiveRegEx: RegExp) { const match = commentDirectiveRegEx.exec(text); if (!match) { return undefined; } switch (match[1]) { case "ts-expect-error": return CommentDirectiveType.ExpectError; case "ts-ignore": return CommentDirectiveType.Ignore; } return undefined; } /** * Unconditionally back up and scan a template expression portion. */ function reScanTemplateToken(isTaggedTemplate: boolean): SyntaxKind { Debug.assert(token === SyntaxKind.CloseBraceToken, "'reScanTemplateToken' should only be called on a '}'"); pos = tokenPos; return token = scanTemplateAndSetTokenValue(isTaggedTemplate); } function reScanTemplateHeadOrNoSubstitutionTemplate(): SyntaxKind { pos = tokenPos; return token = scanTemplateAndSetTokenValue(/* isTaggedTemplate */ true); } function reScanJsxToken(): JsxTokenSyntaxKind { pos = tokenPos = startPos; return token = scanJsxToken(); } function reScanLessThanToken(): SyntaxKind { if (token === SyntaxKind.LessThanLessThanToken) { pos = tokenPos + 1; return token = SyntaxKind.LessThanToken; } return token; } function reScanQuestionToken(): SyntaxKind { Debug.assert(token === SyntaxKind.QuestionQuestionToken, "'reScanQuestionToken' should only be called on a '??'"); pos = tokenPos + 1; return token = SyntaxKind.QuestionToken; } function scanJsxToken(): JsxTokenSyntaxKind { startPos = tokenPos = pos; if (pos >= end) { return token = SyntaxKind.EndOfFileToken; } let char = text.charCodeAt(pos); if (char === CharacterCodes.lessThan) { if (text.charCodeAt(pos + 1) === CharacterCodes.slash) { pos += 2; return token = SyntaxKind.LessThanSlashToken; } pos++; return token = SyntaxKind.LessThanToken; } if (char === CharacterCodes.openBrace) { pos++; return token = SyntaxKind.OpenBraceToken; } // First non-whitespace character on this line. let firstNonWhitespace = 0; let lastNonWhitespace = -1; // These initial values are special because the first line is: // firstNonWhitespace = 0 to indicate that we want leading whitespace, while (pos < end) { // We want to keep track of the last non-whitespace (but including // newlines character for hitting the end of the JSX Text region) if (!isWhiteSpaceSingleLine(char)) { lastNonWhitespace = pos; } char = text.charCodeAt(pos); if (char === CharacterCodes.openBrace) { break; } if (char === CharacterCodes.lessThan) { if (isConflictMarkerTrivia(text, pos)) { pos = scanConflictMarkerTrivia(text, pos, error); return token = SyntaxKind.ConflictMarkerTrivia; } break; } if (char === CharacterCodes.greaterThan) { error(Diagnostics.Unexpected_token_Did_you_mean_or_gt, pos, 1); } if (char === CharacterCodes.closeBrace) { error(Diagnostics.Unexpected_token_Did_you_mean_or_rbrace, pos, 1); } if (lastNonWhitespace > 0) lastNonWhitespace++; // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces. // i.e (- : whitespace) //

---- //

becomes

// //

----

becomes

----

if (isLineBreak(char) && firstNonWhitespace === 0) { firstNonWhitespace = -1; } else if (!isWhiteSpaceLike(char)) { firstNonWhitespace = pos; } pos++; } const endPosition = lastNonWhitespace === -1 ? pos : lastNonWhitespace; tokenValue = text.substring(startPos, endPosition); return firstNonWhitespace === -1 ? SyntaxKind.JsxTextAllWhiteSpaces : SyntaxKind.JsxText; } // Scans a JSX identifier; these differ from normal identifiers in that // they allow dashes function scanJsxIdentifier(): SyntaxKind { if (tokenIsIdentifierOrKeyword(token)) { // An identifier or keyword has already been parsed - check for a `-` and then append it and everything after it to the token // Do note that this means that `scanJsxIdentifier` effectively _mutates_ the visible token without advancing to a new token // Any caller should be expecting this behavior and should only read the pos or token value after calling it. while (pos < end) { const ch = text.charCodeAt(pos); if (ch === CharacterCodes.minus) { tokenValue += "-"; pos++; continue; } const oldPos = pos; tokenValue += scanIdentifierParts(); // reuse `scanIdentifierParts` so unicode escapes are handled if (pos === oldPos) { break; } } } return token; } function scanJsxAttributeValue(): SyntaxKind { startPos = pos; switch (text.charCodeAt(pos)) { case CharacterCodes.doubleQuote: case CharacterCodes.singleQuote: tokenValue = scanString(/*jsxAttributeString*/ true); return token = SyntaxKind.StringLiteral; default: // If this scans anything other than `{`, it's a parse error. return scan(); } } function reScanJsxAttributeValue(): SyntaxKind { pos = tokenPos = startPos; return scanJsxAttributeValue(); } function scanJsDocToken(): JSDocSyntaxKind { startPos = tokenPos = pos; tokenFlags = TokenFlags.None; if (pos >= end) { return token = SyntaxKind.EndOfFileToken; } const ch = codePointAt(text, pos); pos += charSize(ch); switch (ch) { case CharacterCodes.tab: case CharacterCodes.verticalTab: case CharacterCodes.formFeed: case CharacterCodes.space: while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) { pos++; } return token = SyntaxKind.WhitespaceTrivia; case CharacterCodes.at: return token = SyntaxKind.AtToken; case CharacterCodes.carriageReturn: if (text.charCodeAt(pos) === CharacterCodes.lineFeed) { pos++; } // falls through case CharacterCodes.lineFeed: tokenFlags |= TokenFlags.PrecedingLineBreak; return token = SyntaxKind.NewLineTrivia; case CharacterCodes.asterisk: return token = SyntaxKind.AsteriskToken; case CharacterCodes.openBrace: return token = SyntaxKind.OpenBraceToken; case CharacterCodes.closeBrace: return token = SyntaxKind.CloseBraceToken; case CharacterCodes.openBracket: return token = SyntaxKind.OpenBracketToken; case CharacterCodes.closeBracket: return token = SyntaxKind.CloseBracketToken; case CharacterCodes.lessThan: return token = SyntaxKind.LessThanToken; case CharacterCodes.greaterThan: return token = SyntaxKind.GreaterThanToken; case CharacterCodes.equals: return token = SyntaxKind.EqualsToken; case CharacterCodes.comma: return token = SyntaxKind.CommaToken; case CharacterCodes.dot: return token = SyntaxKind.DotToken; case CharacterCodes.backtick: return token = SyntaxKind.BacktickToken; case CharacterCodes.backslash: pos--; const extendedCookedChar = peekExtendedUnicodeEscape(); if (extendedCookedChar >= 0 && isIdentifierStart(extendedCookedChar, languageVersion)) { pos += 3; tokenFlags |= TokenFlags.ExtendedUnicodeEscape; tokenValue = scanExtendedUnicodeEscape() + scanIdentifierParts(); return token = getIdentifierToken(); } const cookedChar = peekUnicodeEscape(); if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) { pos += 6; tokenFlags |= TokenFlags.UnicodeEscape; tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts(); return token = getIdentifierToken(); } pos++; return token = SyntaxKind.Unknown; } if (isIdentifierStart(ch, languageVersion)) { let char = ch; while (pos < end && isIdentifierPart(char = codePointAt(text, pos), languageVersion) || text.charCodeAt(pos) === CharacterCodes.minus) pos += charSize(char); tokenValue = text.substring(tokenPos, pos); if (char === CharacterCodes.backslash) { tokenValue += scanIdentifierParts(); } return token = getIdentifierToken(); } else { return token = SyntaxKind.Unknown; } } function speculationHelper(callback: () => T, isLookahead: boolean): T { const savePos = pos; const saveStartPos = startPos; const saveTokenPos = tokenPos; const saveToken = token; const saveTokenValue = tokenValue; const saveTokenFlags = tokenFlags; const result = callback(); // If our callback returned something 'falsy' or we're just looking ahead, // then unconditionally restore us to where we were. if (!result || isLookahead) { pos = savePos; startPos = saveStartPos; tokenPos = saveTokenPos; token = saveToken; tokenValue = saveTokenValue; tokenFlags = saveTokenFlags; } return result; } function scanRange(start: number, length: number, callback: () => T): T { const saveEnd = end; const savePos = pos; const saveStartPos = startPos; const saveTokenPos = tokenPos; const saveToken = token; const saveTokenValue = tokenValue; const saveTokenFlags = tokenFlags; const saveErrorExpectations = commentDirectives; setText(text, start, length); const result = callback(); end = saveEnd; pos = savePos; startPos = saveStartPos; tokenPos = saveTokenPos; token = saveToken; tokenValue = saveTokenValue; tokenFlags = saveTokenFlags; commentDirectives = saveErrorExpectations; return result; } function lookAhead(callback: () => T): T { return speculationHelper(callback, /*isLookahead*/ true); } function tryScan(callback: () => T): T { return speculationHelper(callback, /*isLookahead*/ false); } function getText(): string { return text; } function clearCommentDirectives() { commentDirectives = undefined; } function setText(newText: string | undefined, start: number | undefined, length: number | undefined) { text = newText || ""; end = length === undefined ? text.length : start! + length; setTextPos(start || 0); } function setOnError(errorCallback: ErrorCallback | undefined) { onError = errorCallback; } function setScriptTarget(scriptTarget: ScriptTarget) { languageVersion = scriptTarget; } function setLanguageVariant(variant: LanguageVariant) { languageVariant = variant; } function setTextPos(textPos: number) { Debug.assert(textPos >= 0); pos = textPos; startPos = textPos; tokenPos = textPos; token = SyntaxKind.Unknown; tokenValue = undefined!; tokenFlags = TokenFlags.None; } function setInJSDocType(inType: boolean) { inJSDocType += inType ? 1 : -1; } } /* @internal */ const codePointAt: (s: string, i: number) => number = (String.prototype as any).codePointAt ? (s, i) => (s as any).codePointAt(i) : function codePointAt(str, i): number { // from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt const size = str.length; // Account for out-of-bounds indices: if (i < 0 || i >= size) { return undefined!; // String.codePointAt returns `undefined` for OOB indexes } // Get the first code unit const first = str.charCodeAt(i); // check if it’s the start of a surrogate pair if (first >= 0xD800 && first <= 0xDBFF && size > i + 1) { // high surrogate and there is a next code unit const second = str.charCodeAt(i + 1); if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; } } return first; }; /* @internal */ function charSize(ch: number) { if (ch >= 0x10000) { return 2; } return 1; } // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec. function utf16EncodeAsStringFallback(codePoint: number) { Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF); if (codePoint <= 65535) { return String.fromCharCode(codePoint); } const codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800; const codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00; return String.fromCharCode(codeUnit1, codeUnit2); } const utf16EncodeAsStringWorker: (codePoint: number) => string = (String as any).fromCodePoint ? codePoint => (String as any).fromCodePoint(codePoint) : utf16EncodeAsStringFallback; /* @internal */ export function utf16EncodeAsString(codePoint: number) { return utf16EncodeAsStringWorker(codePoint); } }