tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-obj-ptrn-empty.js (1834B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/obj-ptrn-empty.case
      3 // - src/dstr-binding/default/gen-func-expr-dflt.template
      4 /*---
      5 description: No property access occurs for an "empty" object binding pattern (generator function expression (default parameter))
      6 esid: sec-generator-function-definitions-runtime-semantics-evaluation
      7 features: [generators, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
     11 
     12        [...]
     13        3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
     14           GeneratorBody, scope, strict).
     15        [...]
     16 
     17    9.2.1 [[Call]] ( thisArgument, argumentsList)
     18 
     19    [...]
     20    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     21    [...]
     22 
     23    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     24 
     25    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     26    [...]
     27 
     28    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     29 
     30    [...]
     31    23. Let iteratorRecord be Record {[[iterator]]:
     32        CreateListIterator(argumentsList), [[done]]: false}.
     33    24. If hasDuplicates is true, then
     34        [...]
     35    25. Else,
     36        b. Let formalStatus be IteratorBindingInitialization for formals with
     37           iteratorRecord and env as arguments.
     38    [...]
     39 
     40    Runtime Semantics: BindingInitialization
     41 
     42    ObjectBindingPattern : { }
     43 
     44    1. Return NormalCompletion(empty).
     45 ---*/
     46 var accessCount = 0;
     47 var obj = Object.defineProperty({}, 'attr', {
     48  get: function() {
     49    accessCount += 1;
     50  }
     51 });
     52 
     53 var callCount = 0;
     54 var f;
     55 f = function*({} = obj) {
     56  assert.sameValue(accessCount, 0);
     57  callCount = callCount + 1;
     58 };
     59 
     60 f().next();
     61 assert.sameValue(callCount, 1, 'generator function invoked exactly once');
     62 
     63 reportCompare(0, 0);