67 lines
2.6 KiB
JavaScript
67 lines
2.6 KiB
JavaScript
'use strict';
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var $TypeError = require('es-errors/type');
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var ArrayCreate = require('./ArrayCreate');
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var CreateDataPropertyOrThrow = require('./CreateDataPropertyOrThrow');
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var GetMatchIndexPair = require('./GetMatchIndexPair');
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var IsArray = require('./IsArray');
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var OrdinaryObjectCreate = require('./OrdinaryObjectCreate');
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var ToString = require('./ToString');
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var every = require('../helpers/every');
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var isMatchRecord = require('../helpers/records/match-record');
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var isStringOrUndefined = function isStringOrUndefined(s) {
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return typeof s === 'undefined' || typeof s === 'string';
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};
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var isMatchRecordOrUndefined = function isMatchRecordOrUndefined(m) {
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return typeof m === 'undefined' || isMatchRecord(m);
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};
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var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1;
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// https://262.ecma-international.org/13.0/#sec-getmatchindexpair
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module.exports = function MakeMatchIndicesIndexPairArray(S, indices, groupNames, hasGroups) {
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if (typeof S !== 'string') {
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throw new $TypeError('Assertion failed: `S` must be a String');
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}
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if (!IsArray(indices) || !every(indices, isMatchRecordOrUndefined)) {
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throw new $TypeError('Assertion failed: `indices` must be a List of either Match Records or `undefined`');
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}
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if (!IsArray(groupNames) || !every(groupNames, isStringOrUndefined)) {
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throw new $TypeError('Assertion failed: `groupNames` must be a List of either Strings or `undefined`');
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}
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if (typeof hasGroups !== 'boolean') {
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throw new $TypeError('Assertion failed: `hasGroups` must be a Boolean');
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}
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var n = indices.length; // step 1
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if (!(n < MAX_ARRAY_LENGTH)) {
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throw new $TypeError('Assertion failed: `indices` length must be less than the max array size, 2**32 - 1');
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}
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if (groupNames.length !== n - 1) {
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throw new $TypeError('Assertion failed: `groupNames` must have exactly one fewer item than `indices`');
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}
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var A = ArrayCreate(n); // step 5
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var groups = hasGroups ? OrdinaryObjectCreate(null) : void undefined; // step 6-7
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CreateDataPropertyOrThrow(A, 'groups', groups); // step 8
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for (var i = 0; i < n; i += 1) { // step 9
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var matchIndices = indices[i]; // step 9.a
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// eslint-disable-next-line no-negated-condition
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var matchIndexPair = typeof matchIndices !== 'undefined' ? GetMatchIndexPair(S, matchIndices) : void undefined; // step 9.b-9.c
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CreateDataPropertyOrThrow(A, ToString(i), matchIndexPair); // step 9.d
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if (i > 0 && typeof groupNames[i - 1] !== 'undefined') { // step 9.e
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if (!groups) {
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throw new $TypeError('if `hasGroups` is `false`, `groupNames` can only contain `undefined` values');
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}
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CreateDataPropertyOrThrow(groups, groupNames[i - 1], matchIndexPair); // step 9.e.i
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}
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}
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return A; // step 10
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};
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