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59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-runtime-semantics-classdefinitionevaluation
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description: >
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Attempting to call `super()` in a null-extending class throws a TypeError,
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because %FunctionPrototype% cannot be called as constructor function.
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info: |
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Runtime Semantics: ClassDefinitionEvaluation
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[...]
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5. If ClassHeritageopt is not present, then
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[...]
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6. Else,
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[...]
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b. Let superclass be the result of evaluating ClassHeritage.
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[...]
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e. If superclass is null, then
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[...]
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ii. Let constructorParent be the intrinsic object %FunctionPrototype%.
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[...]
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15. Let constructorInfo be the result of performing DefineMethod for constructor with arguments proto and constructorParent as the optional functionPrototype argument.
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[...]
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12.3.5.1 Runtime Semantics: Evaluation
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SuperCall : super Arguments
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[...]
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3. Let func be ? GetSuperConstructor().
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4. Let argList be ArgumentListEvaluation of Arguments.
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[...]
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12.3.5.2 Runtime Semantics: GetSuperConstructor ( )
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[...]
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5. Let superConstructor be ! activeFunction.[[GetPrototypeOf]]().
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6. If IsConstructor(superConstructor) is false, throw a TypeError exception.
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[...]
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---*/
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var unreachable = 0;
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var reachable = 0;
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class C extends null {
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constructor() {
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reachable += 1;
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super(unreachable += 1);
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unreachable += 1;
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}
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}
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assert.throws(TypeError, function() {
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new C();
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});
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assert.sameValue(reachable, 1);
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assert.sameValue(unreachable, 0);
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