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Merged revision(s) 81780 from trunk: Use explicit operator bool when available; add nullptr support to shared_ptr. Fixes #4116.

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[SVN r81862]
This commit is contained in:
Peter Dimov
2012-12-11 18:35:21 +00:00
parent b306c9751f
commit d42ce87557
9 changed files with 386 additions and 3 deletions
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140
test/sp_nullptr_test.cpp Normal file
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//
// sp_nullptr_test.cpp
//
// Copyright 2012 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/shared_ptr.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <cstddef>
#include <memory>
#if !defined( BOOST_NO_CXX11_NULLPTR )
struct X
{
static int instances;
X()
{
++instances;
}
~X()
{
--instances;
}
private:
X( X const & );
X & operator=( X const & );
};
int X::instances = 0;
void f( std::nullptr_t )
{
}
int main()
{
{
boost::shared_ptr<void> p( nullptr );
BOOST_TEST( p.get() == 0 );
BOOST_TEST( p.use_count() == 0 );
BOOST_TEST( p == nullptr );
BOOST_TEST( nullptr == p );
BOOST_TEST( !( p != nullptr ) );
BOOST_TEST( !( nullptr != p ) );
}
{
boost::shared_ptr<int> p( nullptr, f );
BOOST_TEST( p.get() == 0 );
BOOST_TEST( p.use_count() == 1 );
BOOST_TEST( p == nullptr );
BOOST_TEST( nullptr == p );
BOOST_TEST( !( p != nullptr ) );
BOOST_TEST( !( nullptr != p ) );
}
{
boost::shared_ptr<int> p( nullptr, f, std::allocator<int>() );
BOOST_TEST( p.get() == 0 );
BOOST_TEST( p.use_count() == 1 );
BOOST_TEST( p == nullptr );
BOOST_TEST( nullptr == p );
BOOST_TEST( !( p != nullptr ) );
BOOST_TEST( !( nullptr != p ) );
}
{
boost::shared_ptr<int> p( new int );
BOOST_TEST( p.get() != 0 );
BOOST_TEST( p.use_count() == 1 );
BOOST_TEST( p != nullptr );
BOOST_TEST( nullptr != p );
BOOST_TEST( !( p == nullptr ) );
BOOST_TEST( !( nullptr == p ) );
p = nullptr;
BOOST_TEST( p.get() == 0 );
BOOST_TEST( p.use_count() == 0 );
BOOST_TEST( p == nullptr );
BOOST_TEST( nullptr == p );
BOOST_TEST( !( p != nullptr ) );
BOOST_TEST( !( nullptr != p ) );
}
{
BOOST_TEST( X::instances == 0 );
boost::shared_ptr<X> p( new X );
BOOST_TEST( X::instances == 1 );
BOOST_TEST( p.get() != 0 );
BOOST_TEST( p.use_count() == 1 );
BOOST_TEST( p != nullptr );
BOOST_TEST( nullptr != p );
BOOST_TEST( !( p == nullptr ) );
BOOST_TEST( !( nullptr == p ) );
p = nullptr;
BOOST_TEST( X::instances == 0 );
BOOST_TEST( p.get() == 0 );
BOOST_TEST( p.use_count() == 0 );
BOOST_TEST( p == nullptr );
BOOST_TEST( nullptr == p );
BOOST_TEST( !( p != nullptr ) );
BOOST_TEST( !( nullptr != p ) );
}
return boost::report_errors();
}
#else
int main()
{
return 0;
}
#endif