bdde081050
Added test to ensure that release notes are parsed properly Updated to latest dependencies to fix security vulnerability Updated GH Actions Workflow to run test before updating tag Updated README.md to reflect proper whatsnew documentation.
105 lines
3.5 KiB
JavaScript
105 lines
3.5 KiB
JavaScript
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'use strict';
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var GetIntrinsic = require('../GetIntrinsic');
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var $TypeError = GetIntrinsic('%TypeError%');
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var $parseInt = GetIntrinsic('%parseInt%');
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var inspect = require('object-inspect');
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var regexTester = require('../helpers/regexTester');
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var callBound = require('../helpers/callBound');
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var every = require('../helpers/every');
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var isDigit = regexTester(/^[0-9]$/);
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var $charAt = callBound('String.prototype.charAt');
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var $strSlice = callBound('String.prototype.slice');
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var IsArray = require('./IsArray');
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var IsInteger = require('./IsInteger');
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var Type = require('./Type');
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var canDistinguishSparseFromUndefined = 0 in [undefined]; // IE 6 - 8 have a bug where this returns false
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var isStringOrHole = function (capture, index, arr) {
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return Type(capture) === 'String' || (canDistinguishSparseFromUndefined ? !(index in arr) : Type(capture) === 'Undefined');
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};
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// https://www.ecma-international.org/ecma-262/6.0/#sec-getsubstitution
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// eslint-disable-next-line max-statements, max-params, max-lines-per-function
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module.exports = function GetSubstitution(matched, str, position, captures, replacement) {
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if (Type(matched) !== 'String') {
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throw new $TypeError('Assertion failed: `matched` must be a String');
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}
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var matchLength = matched.length;
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if (Type(str) !== 'String') {
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throw new $TypeError('Assertion failed: `str` must be a String');
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}
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var stringLength = str.length;
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if (!IsInteger(position) || position < 0 || position > stringLength) {
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throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, and less than or equal to the length of `string`, got ' + inspect(position));
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}
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if (!IsArray(captures) || !every(captures, isStringOrHole)) {
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throw new $TypeError('Assertion failed: `captures` must be a List of Strings, got ' + inspect(captures));
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}
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if (Type(replacement) !== 'String') {
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throw new $TypeError('Assertion failed: `replacement` must be a String');
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}
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var tailPos = position + matchLength;
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var m = captures.length;
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var result = '';
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for (var i = 0; i < replacement.length; i += 1) {
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// if this is a $, and it's not the end of the replacement
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var current = $charAt(replacement, i);
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var isLast = (i + 1) >= replacement.length;
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var nextIsLast = (i + 2) >= replacement.length;
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if (current === '$' && !isLast) {
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var next = $charAt(replacement, i + 1);
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if (next === '$') {
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result += '$';
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i += 1;
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} else if (next === '&') {
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result += matched;
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i += 1;
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} else if (next === '`') {
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result += position === 0 ? '' : $strSlice(str, 0, position - 1);
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i += 1;
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} else if (next === "'") {
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result += tailPos >= stringLength ? '' : $strSlice(str, tailPos);
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i += 1;
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} else {
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var nextNext = nextIsLast ? null : $charAt(replacement, i + 2);
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if (isDigit(next) && next !== '0' && (nextIsLast || !isDigit(nextNext))) {
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// $1 through $9, and not followed by a digit
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var n = $parseInt(next, 10);
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// if (n > m, impl-defined)
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result += (n <= m && Type(captures[n - 1]) === 'Undefined') ? '' : captures[n - 1];
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i += 1;
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} else if (isDigit(next) && (nextIsLast || isDigit(nextNext))) {
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// $00 through $99
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var nn = next + nextNext;
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var nnI = $parseInt(nn, 10) - 1;
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// if nn === '00' or nn > m, impl-defined
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result += (nn <= m && Type(captures[nnI]) === 'Undefined') ? '' : captures[nnI];
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i += 2;
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} else {
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result += '$';
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}
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}
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} else {
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// the final $, or else not a $
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result += $charAt(replacement, i);
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}
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}
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return result;
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};
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