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Showing 1 changed file with 8 additions and 19 deletions.
27 changes: 8 additions & 19 deletions src/lexer/string.ts
Original file line number Diff line number Diff line change
@@ -197,22 +197,22 @@ export function parseEscape(parser: ParserState, context: Context, first: number
return code;
} else {
if ((CharTypes[ch] & CharFlags.Hex) === 0) return Escape.InvalidHex; // first one is mandatory
const c2 = parser.source.charCodeAt(parser.index + 1);
if ((CharTypes[c2] & CharFlags.Hex) === 0) return Escape.InvalidHex;
const c3 = parser.source.charCodeAt(parser.index + 2);
if ((CharTypes[c3] & CharFlags.Hex) === 0) return Escape.InvalidHex;
const c4 = parser.source.charCodeAt(parser.index + 3);
if ((CharTypes[c4] & CharFlags.Hex) === 0) return Escape.InvalidHex;
const ch2 = parser.source.charCodeAt(parser.index + 1);
if ((CharTypes[ch2] & CharFlags.Hex) === 0) return Escape.InvalidHex;
const ch3 = parser.source.charCodeAt(parser.index + 2);
if ((CharTypes[ch3] & CharFlags.Hex) === 0) return Escape.InvalidHex;
const ch4 = parser.source.charCodeAt(parser.index + 3);
if ((CharTypes[ch4] & CharFlags.Hex) === 0) return Escape.InvalidHex;

parser.index += 3;
parser.column += 3;

return (toHex(ch) << 12) | (toHex(c2) << 8) | (toHex(c3) << 4) | toHex(c4);
return (toHex(ch) << 12) | (toHex(ch2) << 8) | (toHex(ch3) << 4) | toHex(ch4);
}
}

default:
return nextUnicodeChar(parser);
return first;
}
}

@@ -236,14 +236,3 @@ export function handleStringError(state: ParserState, code: Escape, isTemplate:
default:
}
}
export function nextUnicodeChar(parser: ParserState) {
let { index } = parser;
const hi = parser.source.charCodeAt(index++);

if (hi < 0xd800 || hi > 0xdbff) return hi;
if (index === parser.source.length) return hi;
const lo = parser.source.charCodeAt(index);

if (lo < 0xdc00 || lo > 0xdfff) return hi;
return ((hi & 0x3ff) << 10) | (lo & 0x3ff) | 0x10000;
}

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