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79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-elision.case
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// - src/dstr-binding/default/func-expr.template
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/*---
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description: Elision advances iterator (function expression)
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esid: sec-function-definitions-runtime-semantics-evaluation
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es6id: 14.1.20
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features: [generator, destructuring-binding]
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flags: [generated]
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info: |
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FunctionExpression : function ( FormalParameters ) { FunctionBody }
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[...]
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3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
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scope, strict).
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[...]
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9.2.1 [[Call]] ( thisArgument, argumentsList)
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[...]
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7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
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[...]
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9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
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1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
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[...]
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9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
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[...]
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23. Let iteratorRecord be Record {[[iterator]]:
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CreateListIterator(argumentsList), [[done]]: false}.
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24. If hasDuplicates is true, then
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[...]
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25. Else,
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b. Let formalStatus be IteratorBindingInitialization for formals with
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iteratorRecord and env as arguments.
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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ArrayBindingPattern : [ Elision ]
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1. Return the result of performing
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IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
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as the argument.
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12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
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Elision : ,
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1. If iteratorRecord.[[done]] is false, then
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a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
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c. ReturnIfAbrupt(next).
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d. If next is false, set iteratorRecord.[[done]] to true.
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2. Return NormalCompletion(empty).
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---*/
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var first = 0;
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var second = 0;
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function* g() {
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first += 1;
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yield;
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second += 1;
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};
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var callCount = 0;
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var f;
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f = function([,]) {
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assert.sameValue(first, 1);
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assert.sameValue(second, 0);
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callCount = callCount + 1;
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};
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f(g());
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assert.sameValue(callCount, 1, 'function invoked exactly once');
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