diff options
Diffstat (limited to 'src/node_modules/es-abstract/2015/SetFunctionName.js')
-rw-r--r-- | src/node_modules/es-abstract/2015/SetFunctionName.js | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/node_modules/es-abstract/2015/SetFunctionName.js b/src/node_modules/es-abstract/2015/SetFunctionName.js new file mode 100644 index 0000000..f93324a --- /dev/null +++ b/src/node_modules/es-abstract/2015/SetFunctionName.js @@ -0,0 +1,44 @@ +'use strict'; + +var GetIntrinsic = require('../GetIntrinsic'); + +var has = require('has'); + +var $TypeError = GetIntrinsic('%TypeError%'); + +var getSymbolDescription = require('../helpers/getSymbolDescription'); + +var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); +var IsExtensible = require('./IsExtensible'); +var Type = require('./Type'); + +// https://ecma-international.org/ecma-262/6.0/#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 + }); +}; |