tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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obj-ptrn-prop-obj-init.js (2020B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/obj-ptrn-prop-obj-init.case
      3 // - src/dstr-binding/default/arrow-function.template
      4 /*---
      5 description: Object binding pattern with "nested" object binding pattern using initializer (arrow function expression)
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    ArrowFunction : ArrowParameters => ConciseBody
     11 
     12    [...]
     13    4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
     14    [...]
     15 
     16    9.2.1 [[Call]] ( thisArgument, argumentsList)
     17 
     18    [...]
     19    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     20    [...]
     21 
     22    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     23 
     24    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     25    [...]
     26 
     27    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     28 
     29    [...]
     30    23. Let iteratorRecord be Record {[[iterator]]:
     31        CreateListIterator(argumentsList), [[done]]: false}.
     32    24. If hasDuplicates is true, then
     33        [...]
     34    25. Else,
     35        b. Let formalStatus be IteratorBindingInitialization for formals with
     36           iteratorRecord and env as arguments.
     37    [...]
     38 
     39    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
     40 
     41    [...]
     42    3. If Initializer is present and v is undefined, then
     43       a. Let defaultValue be the result of evaluating Initializer.
     44       b. Let v be GetValue(defaultValue).
     45       c. ReturnIfAbrupt(v).
     46    4. Return the result of performing BindingInitialization for BindingPattern
     47       passing v and environment as arguments.
     48 ---*/
     49 
     50 var callCount = 0;
     51 var f;
     52 f = ({ w: { x, y, z } = { x: 4, y: 5, z: 6 } }) => {
     53  assert.sameValue(x, 4);
     54  assert.sameValue(y, 5);
     55  assert.sameValue(z, 6);
     56 
     57  assert.throws(ReferenceError, function() {
     58    w;
     59  });
     60  callCount = callCount + 1;
     61 };
     62 
     63 f({ w: undefined });
     64 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     65 
     66 reportCompare(0, 0);