mirror of https://github.com/tc39/test262.git
59 lines
1.9 KiB
JavaScript
59 lines
1.9 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-super-keyword
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es6id: 12.3.5
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description: SuperProperty's "this" value
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info: |
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1. Let propertyKey be StringValue of IdentifierName.
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2. If the code matched by the syntactic production that is being evaluated is
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strict mode code, let strict be true, else let strict be false.
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3. Return ? MakeSuperPropertyReference(propertyKey, strict).
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12.3.5.3 Runtime Semantics: MakeSuperPropertyReference
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1. Let env be GetThisEnvironment( ).
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2. If env.HasSuperBinding() is false, throw a ReferenceError exception.
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3. Let actualThis be ? env.GetThisBinding().
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4. Let baseValue be ? env.GetSuperBase().
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5. Let bv be ? RequireObjectCoercible(baseValue).
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6. Return a value of type Reference that is a Super Reference whose base
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value component is bv, whose referenced name component is propertyKey,
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whose thisValue component is actualThis, and whose strict reference flag
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is strict.
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GetValue (V)
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1. ReturnIfAbrupt(V).
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2. If Type(V) is not Reference, return V.
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3. Let base be GetBase(V).
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4. If IsUnresolvableReference(V) is true, throw a ReferenceError exception.
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5. If IsPropertyReference(V) is true, then
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a. If HasPrimitiveBase(V) is true, then
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i. Assert: In this case, base will never be null or undefined.
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ii. Let base be ! ToObject(base).
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b. Return ? base.[[Get]](GetReferencedName(V), GetThisValue(V)).
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---*/
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var viaCall;
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var viaMember;
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class Parent {
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getThis() {
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return this;
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}
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get This() {
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return this;
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}
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}
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class C extends Parent {
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method() {
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viaCall = super.getThis();
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viaMember = super.This;
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}
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}
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C.prototype.method();
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assert.sameValue(viaCall, C.prototype, 'via CallExpression');
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assert.sameValue(viaMember, C.prototype, 'via MemberExpression');
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