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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-rest-ary-elem.case
// - src/dstr-binding/default/gen-func-expr.template
/*---
description: Rest element containing an array BindingElementList pattern (generator function expression)
esid: sec-generator-function-definitions-runtime-semantics-evaluation
es6id: 14.4.14
features: [generators, destructuring-binding]
flags: [generated]
info: |
GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
[...]
3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, 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
BindingRestElement : ... BindingPattern
1. Let A be ArrayCreate(0).
[...]
3. Repeat
[...]
b. If iteratorRecord.[[done]] is true, then
i. Return the result of performing BindingInitialization of
BindingPattern with A and environment as the arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var f;
f = function*([...[x, y, z]]) {
assert.sameValue(x, 3);
assert.sameValue(y, 4);
assert.sameValue(z, 5);
callCount = callCount + 1;
};
f([3, 4, 5]).next();
assert.sameValue(callCount, 1, 'generator function invoked exactly once');
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