Skip to content
Permalink
9bfb9ba527
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
44 lines (37 sloc) 1.34 KB
'use strict';
var GetIntrinsic = require('get-intrinsic');
var has = require('has');
var $TypeError = GetIntrinsic('%TypeError%');
var getSymbolDescription = require('get-symbol-description');
var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
var IsExtensible = require('./IsExtensible');
var Type = require('./Type');
// https://262.ecma-international.org/6.0/#sec-setfunctionname
module.exports = function SetFunctionName(F, name) {
if (typeof F !== 'function') {
throw new $TypeError('Assertion failed: `F` must be a function');
}
if (!IsExtensible(F) || has(F, 'name')) {
throw new $TypeError('Assertion failed: `F` must be extensible, and must not have a `name` own property');
}
var nameType = Type(name);
if (nameType !== 'Symbol' && nameType !== 'String') {
throw new $TypeError('Assertion failed: `name` must be a Symbol or a String');
}
if (nameType === 'Symbol') {
var description = getSymbolDescription(name);
// eslint-disable-next-line no-param-reassign
name = typeof description === 'undefined' ? '' : '[' + description + ']';
}
if (arguments.length > 2) {
var prefix = arguments[2];
// eslint-disable-next-line no-param-reassign
name = prefix + ' ' + name;
}
return DefinePropertyOrThrow(F, 'name', {
'[[Value]]': name,
'[[Writable]]': false,
'[[Enumerable]]': false,
'[[Configurable]]': true
});
};