tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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instn-named-bndng-dflt-gen-anon.js (2183B)

      1 // |reftest| module
      2 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 description: >
      6    Imported binding reflects state of exported default binding ("anonymous"
      7    generator function declaration)
      8 esid: sec-moduledeclarationinstantiation
      9 info: |
     10    [...]
     11    17. For each element d in lexDeclarations do
     12        a. For each element dn of the BoundNames of d do
     13           i. If IsConstantDeclaration of d is true, then
     14              [...]
     15           ii. Else,
     16               1. Perform ! envRec.CreateMutableBinding(dn, false).
     17           iii. If d is a GeneratorDeclaration production or a
     18                FunctionDeclaration production, then
     19                1. Let fo be the result of performing InstantiateFunctionObject
     20                   for d with argument env.
     21                2. Call envRec.InitializeBinding(dn, fo).
     22    [...]
     23 
     24    14.4.12 Runtime Semantics: InstantiateFunctionObject
     25 
     26    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
     27 
     28    1. If the function code for GeneratorDeclaration is strict mode code, let
     29       strict be true. Otherwise let strict be false.
     30    2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
     31       GeneratorBody, scope, strict).
     32    3. Let prototype be ObjectCreate(%GeneratorPrototype%).
     33    4. Perform DefinePropertyOrThrow(F, "prototype",
     34       PropertyDescriptor{[[Value]]: prototype, [[Writable]]: true,
     35       [[Enumerable]]: false, [[Configurable]]: false}).
     36    5. Perform SetFunctionName(F, "default").
     37    6. Return F.
     38 
     39    14.4 Generator Function Definitions
     40 
     41    Syntax
     42 
     43    GeneratorDeclaration[Yield, Default] :
     44         function * BindingIdentifier[?Yield] ( FormalParameters[Yield] ) { GeneratorBody }
     45         [+Default] function * ( FormalParameters[Yield] ) { GeneratorBody }
     46 flags: [module]
     47 features: [generators]
     48 ---*/
     49 
     50 assert.sameValue(g().next().value, 23, 'generator function value is hoisted');
     51 assert.sameValue(g.name, 'default', 'correct name is assigned');
     52 
     53 import g from './instn-named-bndng-dflt-gen-anon.js';
     54 export default function* () { return 23; };
     55 
     56 reportCompare(0, 0);