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71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-obj-prop-id.case
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// - src/dstr-binding/default/gen-func-expr-dflt.template
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/*---
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description: Rest element containing an object binding pattern (generator function expression (default parameter))
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esid: sec-generator-function-definitions-runtime-semantics-evaluation
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es6id: 14.4.14
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features: [destructuring-binding, default-parameters]
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flags: [generated]
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info: |
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GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
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[...]
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3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
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GeneratorBody, 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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BindingRestElement : ... BindingPattern
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1. Let A be ArrayCreate(0).
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[...]
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3. Repeat
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[...]
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b. If iteratorRecord.[[done]] is true, then
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i. Return the result of performing BindingInitialization of
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BindingPattern with A and environment as the arguments.
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[...]
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---*/
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let length = "outer";
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var callCount = 0;
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var f;
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f = function*([...{ 0: v, 1: w, 2: x, 3: y, length: z }] = [7, 8, 9]) {
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assert.sameValue(v, 7);
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assert.sameValue(w, 8);
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assert.sameValue(x, 9);
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assert.sameValue(y, undefined);
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assert.sameValue(z, 3);
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assert.sameValue(length, "outer", "the length prop is not set as a binding name");
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callCount = callCount + 1;
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};
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f().next();
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assert.sameValue(callCount, 1, 'generator function invoked exactly once');
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