| | |
| | | var isCallable = require('../internals/is-callable'); |
| | | var global = require('../internals/global'); |
| | | var getBuiltIn = require('../internals/get-built-in'); |
| | | var isCallable = require('../internals/is-callable'); |
| | | var isPrototypeOf = require('../internals/object-is-prototype-of'); |
| | | var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid'); |
| | | |
| | | var Object = global.Object; |
| | | |
| | | module.exports = USE_SYMBOL_AS_UID ? function (it) { |
| | | return typeof it == 'symbol'; |
| | | } : function (it) { |
| | | var $Symbol = getBuiltIn('Symbol'); |
| | | return isCallable($Symbol) && Object(it) instanceof $Symbol; |
| | | return isCallable($Symbol) && isPrototypeOf($Symbol.prototype, Object(it)); |
| | | }; |