Source code
Revision control
Copy as Markdown
Other Tools
// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-obj-id-init.case
// - src/dstr-binding/default/func-expr-dflt.template
/*---
description: BindingElement with object binding pattern and initializer is used (function expression (default parameter))
esid: sec-function-definitions-runtime-semantics-evaluation
features: [destructuring-binding, default-parameters]
flags: [generated]
info: |
FunctionExpression : function ( FormalParameters ) { FunctionBody }
[...]
3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
BindingElement : BindingPatternInitializer opt
[...]
2. If iteratorRecord.[[done]] is true, let v be undefined.
3. If Initializer is present and v is undefined, then
a. Let defaultValue be the result of evaluating Initializer.
b. Let v be ? GetValue(defaultValue).
4. Return the result of performing BindingInitialization of BindingPattern
with v and environment as the arguments.
---*/
var callCount = 0;
var f;
f = function([{ x, y, z } = { x: 44, y: 55, z: 66 }] = []) {
assert.sameValue(x, 44);
assert.sameValue(y, 55);
assert.sameValue(z, 66);
callCount = callCount + 1;
};
f();
assert.sameValue(callCount, 1, 'function invoked exactly once');
reportCompare(0, 0);