| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | 'use strict'; |
| 2 | |
| 3 | var GetIntrinsic = require('get-intrinsic'); |
| 4 | |
| 5 | var has = require('has'); |
| 6 | |
| 7 | var $TypeError = GetIntrinsic('%TypeError%'); |
| 8 | |
| 9 | var getSymbolDescription = require('../helpers/getSymbolDescription'); |
| 10 | |
| 11 | var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); |
| 12 | var IsExtensible = require('./IsExtensible'); |
| 13 | var Type = require('./Type'); |
| 14 | |
| 15 | // https://ecma-international.org/ecma-262/6.0/#sec-setfunctionname |
| 16 | |
| 17 | module.exports = function SetFunctionName(F, name) { |
| 18 | if (typeof F !== 'function') { |
| 19 | throw new $TypeError('Assertion failed: `F` must be a function'); |
| 20 | } |
| 21 | if (!IsExtensible(F) || has(F, 'name')) { |
| 22 | throw new $TypeError('Assertion failed: `F` must be extensible, and must not have a `name` own property'); |
| 23 | } |
| 24 | var nameType = Type(name); |
| 25 | if (nameType !== 'Symbol' && nameType !== 'String') { |
| 26 | throw new $TypeError('Assertion failed: `name` must be a Symbol or a String'); |
| 27 | } |
| 28 | if (nameType === 'Symbol') { |
| 29 | var description = getSymbolDescription(name); |
| 30 | // eslint-disable-next-line no-param-reassign |
| 31 | name = typeof description === 'undefined' ? '' : '[' + description + ']'; |
| 32 | } |
| 33 | if (arguments.length > 2) { |
| 34 | var prefix = arguments[2]; |
| 35 | // eslint-disable-next-line no-param-reassign |
| 36 | name = prefix + ' ' + name; |
| 37 | } |
| 38 | return DefinePropertyOrThrow(F, 'name', { |
| 39 | '[[Value]]': name, |
| 40 | '[[Writable]]': false, |
| 41 | '[[Enumerable]]': false, |
| 42 | '[[Configurable]]': true |
| 43 | }); |
| 44 | }; |