| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var callBound = require('call-bind/callBound'); |
| |
| var $SyntaxError = GetIntrinsic('%SyntaxError%'); |
| var getGlobalSymbolDescription = GetIntrinsic('%Symbol.keyFor%', true); |
| var thisSymbolValue = callBound('%Symbol.prototype.valueOf%', true); |
| var symToStr = callBound('Symbol.prototype.toString', true); |
| |
| var getInferredName = require('./getInferredName'); |
| |
| /* eslint-disable consistent-return */ |
| module.exports = callBound('%Symbol.prototype.description%', true) || function getSymbolDescription(symbol) { |
| if (!thisSymbolValue) { |
| throw new $SyntaxError('Symbols are not supported in this environment'); |
| } |
| |
| // will throw if not a symbol primitive or wrapper object |
| var sym = thisSymbolValue(symbol); |
| |
| if (getInferredName) { |
| var name = getInferredName(sym); |
| if (name === '') { |
| return; |
| } |
| return name.slice(1, -1); // name.slice('['.length, -']'.length); |
| } |
| |
| var desc; |
| if (getGlobalSymbolDescription) { |
| desc = getGlobalSymbolDescription(sym); |
| if (typeof desc === 'string') { |
| return desc; |
| } |
| } |
| |
| desc = symToStr(sym).slice(7, -1); // str.slice('Symbol('.length, -')'.length); |
| if (desc) { |
| return desc; |
| } |
| }; |