You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.6 KiB
54 lines
1.6 KiB
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// This is a "No Compile Test" suite.
|
|
// http://dev.chromium.org/developers/testing/no-compile-tests
|
|
|
|
#include "base/callback.h"
|
|
|
|
namespace base {
|
|
|
|
class Parent {
|
|
};
|
|
|
|
class Child : Parent {
|
|
};
|
|
|
|
#if defined(NCTEST_EQUALS_REQUIRES_SAMETYPE) // [r"fatal error: no viable conversion from 'RepeatingCallback<int \(\)>' to 'const RepeatingCallback<void \(\)>'"]
|
|
|
|
// Attempting to call comparison function on two callbacks of different type.
|
|
//
|
|
// This should be a compile time failure because each callback type should be
|
|
// considered distinct.
|
|
void WontCompile() {
|
|
Closure c1;
|
|
Callback<int()> c2;
|
|
c1.Equals(c2);
|
|
}
|
|
|
|
#elif defined(NCTEST_CONSTRUCTION_FROM_SUBTYPE) // [r"fatal error: no viable conversion from 'Callback<base::Parent \(\)>' to 'Callback<base::Child \(\)>'"]
|
|
|
|
// Construction of Callback<A> from Callback<B> if A is supertype of B.
|
|
//
|
|
// While this is technically safe, most people aren't used to it when coding
|
|
// C++ so if this is happening, it is almost certainly an error.
|
|
void WontCompile() {
|
|
Callback<Parent()> cb_a;
|
|
Callback<Child()> cb_b = cb_a;
|
|
}
|
|
|
|
#elif defined(NCTEST_ASSIGNMENT_FROM_SUBTYPE) // [r"fatal error: no viable overloaded '='"]
|
|
|
|
// Assignment of Callback<A> from Callback<B> if A is supertype of B.
|
|
// See explanation for NCTEST_CONSTRUCTION_FROM_SUBTYPE
|
|
void WontCompile() {
|
|
Callback<Parent()> cb_a;
|
|
Callback<Child()> cb_b;
|
|
cb_a = cb_b;
|
|
}
|
|
|
|
#endif
|
|
|
|
} // namespace base
|