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codeql-action/node_modules/es-abstract/2017/GetSubstitution.js
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'use strict'; | |
var GetIntrinsic = require('get-intrinsic'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var $parseInt = GetIntrinsic('%parseInt%'); | |
var inspect = require('object-inspect'); | |
var regexTester = require('safe-regex-test'); | |
var callBound = require('call-bind/callBound'); | |
var every = require('../helpers/every'); | |
var isDigit = regexTester(/^[0-9]$/); | |
var $charAt = callBound('String.prototype.charAt'); | |
var $strSlice = callBound('String.prototype.slice'); | |
var IsArray = require('./IsArray'); | |
var Type = require('./Type'); | |
var isInteger = require('../helpers/isInteger'); | |
var isStringOrHole = require('../helpers/isStringOrHole'); | |
// https://262.ecma-international.org/6.0/#sec-getsubstitution | |
// eslint-disable-next-line max-statements, max-lines-per-function | |
module.exports = function GetSubstitution(matched, str, position, captures, replacement) { | |
if (Type(matched) !== 'String') { | |
throw new $TypeError('Assertion failed: `matched` must be a String'); | |
} | |
var matchLength = matched.length; | |
if (Type(str) !== 'String') { | |
throw new $TypeError('Assertion failed: `str` must be a String'); | |
} | |
var stringLength = str.length; | |
if (!isInteger(position) || position < 0 || position > stringLength) { | |
throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, and less than or equal to the length of `string`, got ' + inspect(position)); | |
} | |
if (!IsArray(captures) || !every(captures, isStringOrHole)) { | |
throw new $TypeError('Assertion failed: `captures` must be a List of Strings, got ' + inspect(captures)); | |
} | |
if (Type(replacement) !== 'String') { | |
throw new $TypeError('Assertion failed: `replacement` must be a String'); | |
} | |
var tailPos = position + matchLength; | |
var m = captures.length; | |
var result = ''; | |
for (var i = 0; i < replacement.length; i += 1) { | |
// if this is a $, and it's not the end of the replacement | |
var current = $charAt(replacement, i); | |
var isLast = (i + 1) >= replacement.length; | |
var nextIsLast = (i + 2) >= replacement.length; | |
if (current === '$' && !isLast) { | |
var next = $charAt(replacement, i + 1); | |
if (next === '$') { | |
result += '$'; | |
i += 1; | |
} else if (next === '&') { | |
result += matched; | |
i += 1; | |
} else if (next === '`') { | |
result += position === 0 ? '' : $strSlice(str, 0, position - 1); | |
i += 1; | |
} else if (next === "'") { | |
result += tailPos >= stringLength ? '' : $strSlice(str, tailPos); | |
i += 1; | |
} else { | |
var nextNext = nextIsLast ? null : $charAt(replacement, i + 2); | |
if (isDigit(next) && next !== '0' && (nextIsLast || !isDigit(nextNext))) { | |
// $1 through $9, and not followed by a digit | |
var n = $parseInt(next, 10); | |
// if (n > m, impl-defined) | |
result += n <= m && Type(captures[n - 1]) === 'Undefined' ? '' : captures[n - 1]; | |
i += 1; | |
} else if (isDigit(next) && (nextIsLast || isDigit(nextNext))) { | |
// $00 through $99 | |
var nn = next + nextNext; | |
var nnI = $parseInt(nn, 10) - 1; | |
// if nn === '00' or nn > m, impl-defined | |
result += nn <= m && Type(captures[nnI]) === 'Undefined' ? '' : captures[nnI]; | |
i += 2; | |
} else { | |
result += '$'; | |
} | |
} | |
} else { | |
// the final $, or else not a $ | |
result += $charAt(replacement, i); | |
} | |
} | |
return result; | |
}; |