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27 lines
914 B
27 lines
914 B
'use strict';
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var DESCRIPTORS = require('../internals/descriptors');
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var FUNCTION_NAME_EXISTS = require('../internals/function-name').EXISTS;
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var uncurryThis = require('../internals/function-uncurry-this');
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var defineBuiltInAccessor = require('../internals/define-built-in-accessor');
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var FunctionPrototype = Function.prototype;
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var functionToString = uncurryThis(FunctionPrototype.toString);
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var nameRE = /function\b(?:\s|\/\*[\S\s]*?\*\/|\/\/[^\n\r]*[\n\r]+)*([^\s(/]*)/;
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var regExpExec = uncurryThis(nameRE.exec);
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var NAME = 'name';
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// Function instances `.name` property
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// https://tc39.es/ecma262/#sec-function-instances-name
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if (DESCRIPTORS && !FUNCTION_NAME_EXISTS) {
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defineBuiltInAccessor(FunctionPrototype, NAME, {
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configurable: true,
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get: function () {
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try {
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return regExpExec(nameRE, functionToString(this))[1];
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} catch (error) {
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return '';
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}
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}
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});
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}
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