forked from lix-project/lix-website
19 lines
533 B
JavaScript
19 lines
533 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var $SyntaxError = require('es-errors/syntax');
|
||
|
|
var callBound = require('call-bind/callBound');
|
||
|
|
|
||
|
|
var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true);
|
||
|
|
|
||
|
|
// https://262.ecma-international.org/9.0/#sec-thissymbolvalue
|
||
|
|
|
||
|
|
module.exports = function thisSymbolValue(value) {
|
||
|
|
if (!$SymbolValueOf) {
|
||
|
|
throw new $SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
|
||
|
|
}
|
||
|
|
if (typeof value === 'symbol') {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
return $SymbolValueOf(value);
|
||
|
|
};
|