tor-browser

The Tor Browser
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dflt-ary-ptrn-elem-id-init-fn-name-gen.js (2208B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-gen.case
      3 // - src/dstr-binding/default/func-decl-dflt.template
      4 /*---
      5 description: SingleNameBinding assigns name to "anonymous" generator functions (function declaration (default parameter))
      6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [generators, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    FunctionDeclaration :
     11        function BindingIdentifier ( FormalParameters ) { FunctionBody }
     12 
     13        [...]
     14        3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
     15           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    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     42 
     43    SingleNameBinding : BindingIdentifier Initializeropt
     44 
     45    [...]
     46    6. If Initializer is present and v is undefined, then
     47       a. Let defaultValue be the result of evaluating Initializer.
     48       b. Let v be GetValue(defaultValue).
     49       c. ReturnIfAbrupt(v).
     50       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
     51          [...]
     52    7. If environment is undefined, return PutValue(lhs, v).
     53    8. Return InitializeReferencedBinding(lhs, v).
     54 
     55 ---*/
     56 
     57 var callCount = 0;
     58 function f([gen = function* () {}, xGen = function* x() {}] = []) {
     59  assert.sameValue(gen.name, 'gen');
     60  assert.notSameValue(xGen.name, 'xGen');
     61  callCount = callCount + 1;
     62 };
     63 f();
     64 assert.sameValue(callCount, 1, 'function invoked exactly once');
     65 
     66 reportCompare(0, 0);