ghaction-upx/node_modules/es-abstract/helpers/getSymbolDescription.js
2020-01-23 08:49:02 +00:00

31 lines
852 B
JavaScript

'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var callBound = require('./callBound');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var symToStr = callBound('Symbol.prototype.toString', true);
var getInferredName = require('./getInferredName');
module.exports = function getSymbolDescription(symbol) {
if (!symToStr) {
throw new $SyntaxError('Symbols are not supported in this environment');
}
var str = symToStr(symbol); // will throw if not a symbol
if (getInferredName) {
var name = getInferredName(symbol);
if (name === '') { return; }
// eslint-disable-next-line consistent-return
return name.slice(1, -1); // name.slice('['.length, -']'.length);
}
var desc = str.slice(7, -1); // str.slice('Symbol('.length, -')'.length);
if (desc) {
// eslint-disable-next-line consistent-return
return desc;
}
};