16 lines
434 B
JavaScript
16 lines
434 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var $TypeError = require('es-errors/type');
|
||
|
|
|
||
|
|
var callBound = require('call-bound');
|
||
|
|
|
||
|
|
var $SymbolToString = callBound('Symbol.prototype.toString', true);
|
||
|
|
|
||
|
|
// https://262.ecma-international.org/6.0/#sec-symboldescriptivestring
|
||
|
|
|
||
|
|
module.exports = function SymbolDescriptiveString(sym) {
|
||
|
|
if (typeof sym !== 'symbol') {
|
||
|
|
throw new $TypeError('Assertion failed: `sym` must be a Symbol');
|
||
|
|
}
|
||
|
|
return $SymbolToString(sym);
|
||
|
|
};
|