gcc/libstdc++-v3/testsuite/20_util/auto_ptr.cc

292 lines
5.6 KiB
C++
Raw Normal View History

// Copyright (C) 2000 Free Software Foundation
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 20.4.5 Template class auto_ptr [lib.auto.ptr]
#include <memory>
#include <debug_assert.h>
struct A
{
A() { ++ctor_count; }
virtual ~A() { ++dtor_count; }
static long ctor_count;
static long dtor_count;
};
long A::ctor_count = 0;
long A::dtor_count = 0;
struct B : A
{
B() { ++ctor_count; }
virtual ~B() { ++dtor_count; }
static long ctor_count;
static long dtor_count;
};
long B::ctor_count = 0;
long B::dtor_count = 0;
struct reset_count_struct
{
~reset_count_struct()
{
A::ctor_count = 0;
A::dtor_count = 0;
B::ctor_count = 0;
B::dtor_count = 0;
}
};
// 20.4.5.1 auto_ptr constructors [lib.auto.ptr.cons]
// Construction from pointer
int
test01()
{
reset_count_struct reset;
bool test = true;
std::auto_ptr<A> A_default;
VERIFY( A_default.get() == 0 );
VERIFY( A::ctor_count == 0 );
VERIFY( A::dtor_count == 0 );
VERIFY( B::ctor_count == 0 );
VERIFY( B::dtor_count == 0 );
std::auto_ptr<A> A_from_A(new A);
VERIFY( A_from_A.get() != 0 );
VERIFY( A::ctor_count == 1 );
VERIFY( A::dtor_count == 0 );
VERIFY( B::ctor_count == 0 );
VERIFY( B::dtor_count == 0 );
std::auto_ptr<A> A_from_B(new B);
VERIFY( A_from_B.get() != 0 );
VERIFY( A::ctor_count == 2 );
VERIFY( A::dtor_count == 0 );
VERIFY( B::ctor_count == 1 );
VERIFY( B::dtor_count == 0 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// Construction from std::auto_ptr
int
test02()
{
reset_count_struct reset;
bool test = true;
std::auto_ptr<A> A_from_A(new A);
std::auto_ptr<B> B_from_B(new B);
std::auto_ptr<A> A_from_ptr_A(A_from_A);
std::auto_ptr<A> A_from_ptr_B(B_from_B);
VERIFY( A_from_A.get() == 0 );
VERIFY( B_from_B.get() == 0 );
VERIFY( A_from_ptr_A.get() != 0 );
VERIFY( A_from_ptr_B.get() != 0 );
VERIFY( A::ctor_count == 2 );
VERIFY( A::dtor_count == 0 );
VERIFY( B::ctor_count == 1 );
VERIFY( B::dtor_count == 0 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// Assignment from std::auto_ptr
int
test03()
{
reset_count_struct reset;
bool test = true;
std::auto_ptr<A> A_from_ptr_A;
std::auto_ptr<A> A_from_ptr_B;
std::auto_ptr<A> A_from_A(new A);
std::auto_ptr<B> B_from_B(new B);
A_from_ptr_A = A_from_A;
A_from_ptr_B = B_from_B;
VERIFY( A_from_A.get() == 0 );
VERIFY( B_from_B.get() == 0 );
VERIFY( A_from_ptr_A.get() != 0 );
VERIFY( A_from_ptr_B.get() != 0 );
VERIFY( A::ctor_count == 2 );
VERIFY( A::dtor_count == 0 );
VERIFY( B::ctor_count == 1 );
VERIFY( B::dtor_count == 0 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// Destruction
int
test04()
{
reset_count_struct reset;
bool test = true;
{/*lifetine scope*/
std::auto_ptr<A> A_from_A(new A);
std::auto_ptr<A> A_from_B(new B);
std::auto_ptr<B> B_from_B(new B);
}/*destructors called here*/
VERIFY( A::ctor_count == 3 );
VERIFY( A::dtor_count == 3 );
VERIFY( B::ctor_count == 2 );
VERIFY( B::dtor_count == 2 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// Class member construction/destruction
template <typename T>
class pimpl
{
public:
pimpl() : p_impl(new T) {}
private:
std::auto_ptr<T> p_impl;
};
int
test05()
{
bool test = true;
reset_count_struct reset;
pimpl<A>();
pimpl<B>();
VERIFY( A::ctor_count == 2 );
VERIFY( A::dtor_count == 2 );
VERIFY( B::ctor_count == 1 );
VERIFY( B::dtor_count == 1 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// 20.4.5.2 auto_ptr members [lib.auto.ptr.members]
// Member access
int
test06()
{
reset_count_struct reset;
bool test = true;
std::auto_ptr<A> A_from_A(new A);
std::auto_ptr<A> A_from_A_ptr(A_from_A.release());
VERIFY( A_from_A.get() == 0 );
VERIFY( A_from_A_ptr.get() != 0 );
VERIFY( A_from_A->ctor_count == 1 );
VERIFY( (*A_from_A).dtor_count == 0 );
A* A_ptr = A_from_A_ptr.get();
A_from_A_ptr.reset(A_ptr);
VERIFY( A_from_A_ptr.get() == A_ptr );
VERIFY( A_from_A_ptr->ctor_count == 1 );
VERIFY( (*A_from_A_ptr).dtor_count == 0 );
A_from_A_ptr.reset(new A);
VERIFY( A_from_A_ptr.get() != A_ptr );
VERIFY( A_from_A_ptr->ctor_count == 2 );
VERIFY( (*A_from_A_ptr).dtor_count == 1 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
// 20.4.5.3 auto_ptr conversions [lib.auto.ptr.conv]
// Parameters and return values
template <typename T>
static std::auto_ptr<T> source()
{
return std::auto_ptr<T>(new T);
}
template <typename T>
static void drain(std::auto_ptr<T>)
{}
int
test07()
{
bool test = true;
reset_count_struct reset;
drain(source<A>());
drain<A>(source<B>());
drain(source<B>());
VERIFY( A::ctor_count == 3 );
VERIFY( A::dtor_count == 3 );
VERIFY( B::ctor_count == 2 );
VERIFY( B::dtor_count == 2 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return 0;
}
int
main()
{
test01();
test02();
test03();
test04();
test05();
test06();
test07();
return 0;
}