| [d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var StrictEqualityComparison = require('./StrictEqualityComparison');
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| 4 | var StringToBigInt = require('./StringToBigInt');
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| 5 | var ToNumber = require('./ToNumber');
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| 6 | var ToPrimitive = require('./ToPrimitive');
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| 7 | var Type = require('./Type');
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| 8 |
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| 9 | var isNaN = require('../helpers/isNaN');
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| 10 |
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| 11 | // https://262.ecma-international.org/11.0/#sec-abstract-equality-comparison
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| 12 |
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| 13 | module.exports = function AbstractEqualityComparison(x, y) {
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| 14 | var xType = Type(x);
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| 15 | var yType = Type(y);
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| 16 | if (xType === yType) {
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| 17 | return StrictEqualityComparison(x, y);
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| 18 | }
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| 19 | if (x == null && y == null) {
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| 20 | return true;
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| 21 | }
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| 22 | if (xType === 'Number' && yType === 'String') {
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| 23 | return AbstractEqualityComparison(x, ToNumber(y));
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| 24 | }
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| 25 | if (xType === 'String' && yType === 'Number') {
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| 26 | return AbstractEqualityComparison(ToNumber(x), y);
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| 27 | }
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| 28 | if (xType === 'BigInt' && yType === 'String') {
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| 29 | var n = StringToBigInt(y);
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| 30 | if (isNaN(n)) {
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| 31 | return false;
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| 32 | }
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| 33 | return AbstractEqualityComparison(x, n);
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| 34 | }
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| 35 | if (xType === 'String' && yType === 'BigInt') {
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| 36 | return AbstractEqualityComparison(y, x);
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| 37 | }
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| 38 | if (xType === 'Boolean') {
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| 39 | return AbstractEqualityComparison(ToNumber(x), y);
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| 40 | }
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| 41 | if (yType === 'Boolean') {
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| 42 | return AbstractEqualityComparison(x, ToNumber(y));
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| 43 | }
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| 44 | if ((xType === 'String' || xType === 'Number' || xType === 'BigInt' || xType === 'Symbol') && yType === 'Object') {
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| 45 | return AbstractEqualityComparison(x, ToPrimitive(y));
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| 46 | }
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| 47 | if (xType === 'Object' && (yType === 'String' || yType === 'Number' || yType === 'BigInt' || yType === 'Symbol')) {
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| 48 | return AbstractEqualityComparison(ToPrimitive(x), y);
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| 49 | }
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| 50 | if ((xType === 'BigInt' && yType === 'Number') || (xType === 'Number' && yType === 'BigInt')) {
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| 51 | if (isNaN(x) || isNaN(y) || x === Infinity || y === Infinity || x === -Infinity || y === -Infinity) {
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| 52 | return false;
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| 53 | }
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| 54 | return x == y; // eslint-disable-line eqeqeq
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| 55 | }
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| 56 | return false;
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| 57 | };
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