tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-obj-ptrn-rest-getter.js (1808B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/obj-ptrn-rest-getter.case
      3 // - src/dstr-binding/default/gen-func-decl-dflt.template
      4 /*---
      5 description: Getter is called when obj is being deconstructed to a rest Object (generator function declaration (default parameter))
      6 esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [object-rest, generators, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 includes: [propertyHelper.js]
     10 info: |
     11    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
     12 
     13        [...]
     14        2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
     15           GeneratorBody, scope, strict).
     16        [...]
     17 
     18    9.2.1 [[Call]] ( thisArgument, argumentsList)
     19 
     20    [...]
     21    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     22    [...]
     23 
     24    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     25 
     26    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     27    [...]
     28 
     29    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     30 
     31    [...]
     32    23. Let iteratorRecord be Record {[[iterator]]:
     33        CreateListIterator(argumentsList), [[done]]: false}.
     34    24. If hasDuplicates is true, then
     35        [...]
     36    25. Else,
     37        b. Let formalStatus be IteratorBindingInitialization for formals with
     38           iteratorRecord and env as arguments.
     39    [...]
     40 ---*/
     41 var count = 0;
     42 
     43 var callCount = 0;
     44 function* f({...x} = { get v() { count++; return 2; } }) {
     45  assert.sameValue(count, 1);
     46 
     47  verifyProperty(x, "v", {
     48    enumerable: true,
     49    writable: true,
     50    configurable: true,
     51    value: 2
     52  });
     53  callCount = callCount + 1;
     54 };
     55 f().next();
     56 assert.sameValue(callCount, 1, 'generator function invoked exactly once');
     57 
     58 reportCompare(0, 0);