[79a0317] | 1 | 'use strict';
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| 2 | var uncurryThis = require('../internals/function-uncurry-this');
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| 3 | var toObject = require('../internals/to-object');
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| 4 |
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| 5 | var floor = Math.floor;
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| 6 | var charAt = uncurryThis(''.charAt);
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| 7 | var replace = uncurryThis(''.replace);
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| 8 | var stringSlice = uncurryThis(''.slice);
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| 9 | // eslint-disable-next-line redos/no-vulnerable -- safe
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| 10 | var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
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| 11 | var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
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| 12 |
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| 13 | // `GetSubstitution` abstract operation
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| 14 | // https://tc39.es/ecma262/#sec-getsubstitution
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| 15 | module.exports = function (matched, str, position, captures, namedCaptures, replacement) {
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| 16 | var tailPos = position + matched.length;
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| 17 | var m = captures.length;
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| 18 | var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
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| 19 | if (namedCaptures !== undefined) {
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| 20 | namedCaptures = toObject(namedCaptures);
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| 21 | symbols = SUBSTITUTION_SYMBOLS;
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| 22 | }
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| 23 | return replace(replacement, symbols, function (match, ch) {
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| 24 | var capture;
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| 25 | switch (charAt(ch, 0)) {
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| 26 | case '$': return '$';
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| 27 | case '&': return matched;
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| 28 | case '`': return stringSlice(str, 0, position);
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| 29 | case "'": return stringSlice(str, tailPos);
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| 30 | case '<':
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| 31 | capture = namedCaptures[stringSlice(ch, 1, -1)];
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| 32 | break;
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| 33 | default: // \d\d?
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| 34 | var n = +ch;
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| 35 | if (n === 0) return match;
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| 36 | if (n > m) {
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| 37 | var f = floor(n / 10);
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| 38 | if (f === 0) return match;
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| 39 | if (f <= m) return captures[f - 1] === undefined ? charAt(ch, 1) : captures[f - 1] + charAt(ch, 1);
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| 40 | return match;
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| 41 | }
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| 42 | capture = captures[n - 1];
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| 43 | }
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| 44 | return capture === undefined ? '' : capture;
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| 45 | });
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| 46 | };
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