44 lines
1.2 KiB
JavaScript
Executable file
44 lines
1.2 KiB
JavaScript
Executable file
'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;
|
|
}
|
|
};
|