45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
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'use strict';
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var GetIntrinsic = require('../GetIntrinsic');
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var has = require('has');
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var $TypeError = GetIntrinsic('%TypeError%');
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var getSymbolDescription = require('../helpers/getSymbolDescription');
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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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