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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;
isIdentifier(): boolean;
isReservedWord(): boolean;
isUnterminated(): boolean;
/* @internal */
getTokenFlags(): TokenFlags;
reScanGreaterToken(): SyntaxKind;
reScanSlashToken(): SyntaxKind;
reScanTemplateToken(): SyntaxKind;
scanJsxIdentifier(): SyntaxKind;
scanJsxAttributeValue(): SyntaxKind;
reScanJsxToken(): JsxTokenSyntaxKind;
reScanLessThanToken(): SyntaxKind;
reScanQuestionToken(): SyntaxKind;
scanJsxToken(): JsxTokenSyntaxKind;
scanJsDocToken(): JSDocSyntaxKind;
scan(): SyntaxKind;
getText(): string;
// 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<T>(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<T>(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<T>(callback: () => T): T;
}
const textToKeywordObj: MapLike<KeywordSyntaxKind> = {
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<SyntaxKind>({
...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.LessThanSlashToken,
">>": 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.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),
<ZWNJ>, or
<ZWJ>.
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];
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: Map<number>): 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 */
/**
* We assume the first line starts at position 0 and 'position' is non-negative.
*/
export function computeLineAndCharacterOfPosition(lineStarts: readonly number[], position: number): LineAndCharacter {
let lineNumber = binarySearch(lineStarts, position, identity, compareValues);
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 {
line: lineNumber,
character: position - lineStarts[lineNumber]
};
}
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 <LF>
// \u000D Carriage Return <CR>
// \u2028 Line separator <LS>
// \u2029 Paragraph separator <PS>
// 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;
}
/* @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<T, U>(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<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
export function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined;
export function forEachLeadingCommentRange<T, U>(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<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
export function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined;
export function forEachTrailingCommentRange<T, U>(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<T, U>(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<T, U>(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): boolean {
return ch >= CharacterCodes.A && ch <= CharacterCodes.Z || ch >= CharacterCodes.a && ch <= CharacterCodes.z ||
ch >= CharacterCodes._0 && ch <= CharacterCodes._9 || ch === CharacterCodes.$ || ch === CharacterCodes._ ||
ch > CharacterCodes.maxAsciiCharacter && isUnicodeIdentifierPart(ch, languageVersion);
}
/* @internal */
export function isIdentifierText(name: string, languageVersion: ScriptTarget | undefined): 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)) {
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 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,
isIdentifier: () => token === SyntaxKind.Identifier || token > SyntaxKind.LastReservedWord,
isReservedWord: () => token >= SyntaxKind.FirstReservedWord && token <= SyntaxKind.LastReservedWord,
isUnterminated: () => (tokenFlags & TokenFlags.Unterminated) !== 0,
getTokenFlags: () => tokenFlags,
reScanGreaterToken,
reScanSlashToken,
reScanTemplateToken,
scanJsxIdentifier,
scanJsxAttributeValue,
reScanJsxToken,
reScanLessThanToken,
reScanQuestionToken,
scanJsxToken,
scanJsDocToken,
scan,
getText,
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(): 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();
start = pos;
continue;
}
// Speculated ECMAScript 6 Spec 11.8.6.1:
// <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> 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(): string {
pos++;
if (pos >= end) {
error(Diagnostics.Unexpected_end_of_text);
return "";
}
const ch = text.charCodeAt(pos);
pos++;
switch (ch) {
case CharacterCodes._0:
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:
// '\u{DDDDDDDD}'
if (pos < end && text.charCodeAt(pos) === CharacterCodes.openBrace) {
tokenFlags |= TokenFlags.ExtendedUnicodeEscape;
pos++;
return scanExtendedUnicodeEscape();
}
tokenFlags |= TokenFlags.UnicodeEscape;
// '\uDDDD'
return scanHexadecimalEscape(/*numDigits*/ 4);
case CharacterCodes.x:
// '\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);
}
// Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
function utf16EncodeAsString(codePoint: number): string {
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);
}
// 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();
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) {
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++;
}
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;
while (pos < end) {
const ch = text.charCodeAt(pos);
if (ch === CharacterCodes.asterisk && text.charCodeAt(pos + 1) === CharacterCodes.slash) {
pos += 2;
commentClosed = true;
break;
}
if (isLineBreak(ch)) {
tokenFlags |= TokenFlags.PrecedingLineBreak;
}
pos++;
}
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:
pos++;
if (text.charCodeAt(pos) === CharacterCodes.dot && !isDigit(text.charCodeAt(pos + 1))) {
pos++;
return token = SyntaxKind.QuestionDotToken;
}
if (text.charCodeAt(pos) === CharacterCodes.question) {
pos++;
return token = SyntaxKind.QuestionQuestionToken;
}
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) {
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;
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 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;
}
/**
* Unconditionally back up and scan a template expression portion.
*/
function reScanTemplateToken(): SyntaxKind {
Debug.assert(token === SyntaxKind.CloseBraceToken, "'reScanTemplateToken' should only be called on a '}'");
pos = tokenPos;
return token = scanTemplateAndSetTokenValue();
}
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;
// These initial values are special because the first line is:
// firstNonWhitespace = 0 to indicate that we want leading whitespace,
while (pos < end) {
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;
}
// FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
// i.e (- : whitespace)
// <div>----
// </div> becomes <div></div>
//
// <div>----</div> becomes <div>----</div>
if (isLineBreak(char) && firstNonWhitespace === 0) {
firstNonWhitespace = -1;
}
else if (!isWhiteSpaceLike(char)) {
firstNonWhitespace = pos;
}
pos++;
}
tokenValue = text.substring(startPos, pos);
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 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.lineFeed:
case CharacterCodes.carriageReturn:
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<T>(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<T>(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;
setText(text, start, length);
const result = callback();
end = saveEnd;
pos = savePos;
startPos = saveStartPos;
tokenPos = saveTokenPos;
token = saveToken;
tokenValue = saveTokenValue;
tokenFlags = saveTokenFlags;
return result;
}
function lookAhead<T>(callback: () => T): T {
return speculationHelper(callback, /*isLookahead*/ true);
}
function tryScan<T>(callback: () => T): T {
return speculationHelper(callback, /*isLookahead*/ false);
}
function getText(): string {
return text;
}
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;
}
}
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