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78 lines
2.6 KiB
JavaScript
78 lines
2.6 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
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// - src/dstr-binding/error/cls-expr-async-gen-meth-dflt.template
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/*---
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description: Error forwarding when IteratorStep returns an abrupt completion (class expression async generator method (default parameter))
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esid: sec-class-definitions-runtime-semantics-evaluation
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features: [generators, async-iteration]
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flags: [generated]
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info: |
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ClassExpression : class BindingIdentifieropt ClassTail
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1. If BindingIdentifieropt is not present, let className be undefined.
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2. Else, let className be StringValue of BindingIdentifier.
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3. Let value be the result of ClassDefinitionEvaluation of ClassTail
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with argument className.
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[...]
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14.5.14 Runtime Semantics: ClassDefinitionEvaluation
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21. For each ClassElement m in order from methods
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a. If IsStatic of m is false, then
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i. Let status be the result of performing
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PropertyDefinitionEvaluation for m with arguments proto and
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false.
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[...]
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Runtime Semantics: PropertyDefinitionEvaluation
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AsyncGeneratorMethod :
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async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
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{ AsyncGeneratorBody }
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1. Let propKey be the result of evaluating PropertyName.
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2. ReturnIfAbrupt(propKey).
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3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
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Otherwise let strict be false.
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4. Let scope be the running execution context's LexicalEnvironment.
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5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
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AsyncGeneratorBody, scope, strict).
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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BindingRestElement : ... BindingIdentifier
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1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
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environment).
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2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
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a. If iteratorRecord.[[done]] is false,
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i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
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true.
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iii. ReturnIfAbrupt(next).
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---*/
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var first = 0;
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var second = 0;
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var iter = function*() {
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first += 1;
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throw new Test262Error();
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second += 1;
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}();
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var C = class {
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async *method([...x] = iter) {
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}
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};
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var method = C.prototype.method;
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assert.throws(Test262Error, function() {
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method();
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});
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iter.next();
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assert.sameValue(first, 1);
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assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
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