tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-dflt-ary-ptrn-elem-obj-prop-id.js (2473B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elem-obj-prop-id.case
      3 // - src/dstr-binding/default/meth-dflt.template
      4 /*---
      5 description: BindingElement with object binding pattern and initializer is not used (method (default parameter))
      6 esid: sec-runtime-semantics-definemethod
      7 features: [destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     11 
     12    [...]
     13    6. Let closure be FunctionCreate(kind, StrictFormalParameters,
     14       FunctionBody, scope, strict). If functionPrototype was passed as a
     15       parameter then pass its value as the functionPrototype optional argument
     16       of FunctionCreate.
     17    [...]
     18 
     19    9.2.1 [[Call]] ( thisArgument, argumentsList)
     20 
     21    [...]
     22    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     23    [...]
     24 
     25    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     26 
     27    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     28    [...]
     29 
     30    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     31 
     32    [...]
     33    23. Let iteratorRecord be Record {[[iterator]]:
     34        CreateListIterator(argumentsList), [[done]]: false}.
     35    24. If hasDuplicates is true, then
     36        [...]
     37    25. Else,
     38        b. Let formalStatus be IteratorBindingInitialization for formals with
     39           iteratorRecord and env as arguments.
     40    [...]
     41 
     42    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     43 
     44    BindingElement : BindingPatternInitializer opt
     45 
     46    [...]
     47    2. If iteratorRecord.[[done]] is true, let v be undefined.
     48    3. If Initializer is present and v is undefined, then
     49       a. Let defaultValue be the result of evaluating Initializer.
     50       b. Let v be ? GetValue(defaultValue).
     51    4. Return the result of performing BindingInitialization of BindingPattern
     52       with v and environment as the arguments.
     53 ---*/
     54 
     55 var callCount = 0;
     56 var obj = {
     57  method([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }] = [{ u: 777, w: 888, y: 999 }]) {
     58    assert.sameValue(v, 777);
     59    assert.sameValue(x, 888);
     60    assert.sameValue(z, 999);
     61 
     62    assert.throws(ReferenceError, function() {
     63      u;
     64    });
     65    assert.throws(ReferenceError, function() {
     66      w;
     67    });
     68    assert.throws(ReferenceError, function() {
     69      y;
     70    });
     71    callCount = callCount + 1;
     72  }
     73 };
     74 
     75 obj.method();
     76 assert.sameValue(callCount, 1, 'method invoked exactly once');
     77 
     78 reportCompare(0, 0);