Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| module
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: >
Imported binding reflects state of exported default binding ("anonymous"
generator function declaration)
esid: sec-moduledeclarationinstantiation
info: |
[...]
17. For each element d in lexDeclarations do
a. For each element dn of the BoundNames of d do
i. If IsConstantDeclaration of d is true, then
[...]
ii. Else,
1. Perform ! envRec.CreateMutableBinding(dn, false).
iii. If d is a GeneratorDeclaration production or a
FunctionDeclaration production, then
1. Let fo be the result of performing InstantiateFunctionObject
for d with argument env.
2. Call envRec.InitializeBinding(dn, fo).
[...]
14.4.12 Runtime Semantics: InstantiateFunctionObject
GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
1. If the function code for GeneratorDeclaration is strict mode code, let
strict be true. Otherwise let strict be false.
2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, scope, strict).
3. Let prototype be ObjectCreate(%GeneratorPrototype%).
4. Perform DefinePropertyOrThrow(F, "prototype",
PropertyDescriptor{[[Value]]: prototype, [[Writable]]: true,
[[Enumerable]]: false, [[Configurable]]: false}).
5. Perform SetFunctionName(F, "default").
6. Return F.
14.4 Generator Function Definitions
Syntax
GeneratorDeclaration[Yield, Default] :
function * BindingIdentifier[?Yield] ( FormalParameters[Yield] ) { GeneratorBody }
[+Default] function * ( FormalParameters[Yield] ) { GeneratorBody }
flags: [module]
features: [generators]
---*/
assert.sameValue(g().next().value, 23, 'generator function value is hoisted');
assert.sameValue(g.name, 'default', 'correct name is assigned');
import g from './instn-named-bndng-dflt-gen-anon.js';
export default function* () { return 23; };
reportCompare(0, 0);