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54 lines
1.7 KiB
Text
54 lines
1.7 KiB
Text
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This is a "No Compile Test" suite.
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// http://dev.chromium.org/developers/testing/no-compile-tests
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#include "base/callback.h"
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namespace base {
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class Parent {
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};
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class Child : Parent {
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};
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#if defined(NCTEST_EQUALS_REQUIRES_SAMETYPE) // [r"fatal error: invalid operands to binary expression \('RepeatingCallback<void \(\)>' and 'RepeatingCallback<int \(\)>'\)"]
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// Attempting to call comparison function on two callbacks of different type.
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//
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// This should be a compile time failure because each callback type should be
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// considered distinct.
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void WontCompile() {
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RepeatingCallback<void()> c1;
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RepeatingCallback<int()> c2;
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c1 == c2;
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}
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#elif defined(NCTEST_CONSTRUCTION_FROM_SUBTYPE) // [r"fatal error: no viable conversion from 'RepeatingCallback<base::Parent \(\)>' to 'RepeatingCallback<base::Child \(\)>'"]
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// Construction of RepeatingCallback<A> from RepeatingCallback<B> if A is
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// supertype of B.
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//
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// While this is technically safe, most people aren't used to it when coding
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// C++ so if this is happening, it is almost certainly an error.
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void WontCompile() {
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RepeatingCallback<Parent()> cb_a;
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RepeatingCallback<Child()> cb_b = cb_a;
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}
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#elif defined(NCTEST_ASSIGNMENT_FROM_SUBTYPE) // [r"fatal error: no viable overloaded '='"]
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// Assignment of RepeatingCallback<A> from RepeatingCallback<B> if A is
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// supertype of B. See explanation for NCTEST_CONSTRUCTION_FROM_SUBTYPE.
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void WontCompile() {
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RepeatingCallback<Parent()> cb_a;
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RepeatingCallback<Child()> cb_b;
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cb_a = cb_b;
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}
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#endif
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} // namespace base
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