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20 lines
520 B
JavaScript
20 lines
520 B
JavaScript
'use strict';
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var callBound = require('../helpers/callBound');
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var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true);
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var Type = require('./Type');
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// https://ecma-international.org/ecma-262/9.0/#sec-thissymbolvalue
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module.exports = function thisSymbolValue(value) {
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if (!$SymbolValueOf) {
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throw new SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
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}
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if (Type(value) === 'Symbol') {
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return value;
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}
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return $SymbolValueOf(value);
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};
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