| '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); | |
| }; |