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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "mozilla/TypeTraits.h"
using mozilla::IsConvertible;
class A { };
class B : public A { };
class C : private A { };
class D { };
static void
TestIsConvertible()
{
// Pointer type convertibility
MOZ_ASSERT((IsConvertible<A*, A*>::value),
"A* should convert to A*");
MOZ_ASSERT((IsConvertible<B*, A*>::value),
"B* should convert to A*");
MOZ_ASSERT((!IsConvertible<A*, B*>::value),
"A* shouldn't convert to B*");
MOZ_ASSERT((!IsConvertible<A*, C*>::value),
"A* shouldn't convert to C*");
MOZ_ASSERT((!IsConvertible<A*, D*>::value),
"A* shouldn't convert to unrelated D*");
MOZ_ASSERT((!IsConvertible<D*, A*>::value),
"D* shouldn't convert to unrelated A*");
// Instance type convertibility
MOZ_ASSERT((IsConvertible<A, A>::value),
"A is A");
MOZ_ASSERT((IsConvertible<B, A>::value),
"B converts to A");
MOZ_ASSERT((!IsConvertible<D, A>::value),
"D and A are unrelated");
MOZ_ASSERT((!IsConvertible<A, D>::value),
"A and D are unrelated");
// These cases seem to require C++11 support to properly implement them, so
// for now just disable them.
//MOZ_ASSERT((!IsConvertible<C*, A*>::value),
// "C* shouldn't convert to A* (private inheritance)");
//MOZ_ASSERT((!IsConvertible<C, A>::value),
// "C doesn't convert to A (private inheritance)");
}
int
main()
{
TestIsConvertible();
}
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