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44 lines
1.3 KiB
44 lines
1.3 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var has = require('has'); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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var getSymbolDescription = require('get-symbol-description'); |
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var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); |
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var IsExtensible = require('./IsExtensible'); |
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var Type = require('./Type'); |
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// https://ecma-international.org/ecma-262/6.0/#sec-setfunctionname |
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module.exports = function SetFunctionName(F, name) { |
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if (typeof F !== 'function') { |
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throw new $TypeError('Assertion failed: `F` must be a function'); |
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} |
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if (!IsExtensible(F) || has(F, 'name')) { |
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throw new $TypeError('Assertion failed: `F` must be extensible, and must not have a `name` own property'); |
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} |
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var nameType = Type(name); |
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if (nameType !== 'Symbol' && nameType !== 'String') { |
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throw new $TypeError('Assertion failed: `name` must be a Symbol or a String'); |
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} |
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if (nameType === 'Symbol') { |
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var description = getSymbolDescription(name); |
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// eslint-disable-next-line no-param-reassign |
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name = typeof description === 'undefined' ? '' : '[' + description + ']'; |
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} |
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if (arguments.length > 2) { |
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var prefix = arguments[2]; |
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// eslint-disable-next-line no-param-reassign |
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name = prefix + ' ' + name; |
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} |
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return DefinePropertyOrThrow(F, 'name', { |
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'[[Value]]': name, |
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'[[Writable]]': false, |
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'[[Enumerable]]': false, |
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'[[Configurable]]': true |
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}); |
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};
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