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Add hash_value for shared_ptr; prevents hash_value( bool ) from being used. Refs #5216.

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[SVN r69260]
This commit is contained in:
Peter Dimov
2011-02-24 23:24:54 +00:00
parent e3d2f2ee6b
commit 69aa01ec00
3 changed files with 46 additions and 1 deletions
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12
include/boost/smart_ptr/shared_ptr.hpp
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@ -41,6 +41,7 @@
#include <algorithm> // for std::swap
#include <functional> // for std::less
#include <typeinfo> // for std::bad_cast
#include <cstddef> // for std::size_t
#if !defined(BOOST_NO_IOSTREAM)
#if !defined(BOOST_NO_IOSFWD)
@ -722,7 +723,16 @@ template<class T> inline bool atomic_compare_exchange_explicit( shared_ptr<T> *
return atomic_compare_exchange( p, v, w ); // std::move( w )
}
#endif
#endif // !defined(BOOST_SP_NO_ATOMIC_ACCESS)
// hash_value
template< class T > struct hash;
template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p )
{
return boost::hash< T* >()( p.get() );
}
} // namespace boost

1
test/Jamfile.v2
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@ -65,5 +65,6 @@ import testing ;
[ run atomic_count_test2.cpp ]
[ run sp_typeinfo_test.cpp ]
[ compile make_shared_fp_test.cpp ]
[ run sp_hash_test.cpp ]
;
}

34
test/sp_hash_test.cpp Normal file
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@ -0,0 +1,34 @@
//
// sp_hash_test.cpp
//
// Copyright 2011 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/functional/hash.hpp>
#include <boost/detail/lightweight_test.hpp>
int main()
{
boost::hash< boost::shared_ptr<int> > hasher;
boost::shared_ptr< int > p1, p2( p1 ), p3( new int ), p4( p3 ), p5( new int );
BOOST_TEST_EQ( p1, p2 );
BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
BOOST_TEST_NE( p1, p3 );
BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
BOOST_TEST_EQ( p3, p4 );
BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
BOOST_TEST_NE( p3, p5 );
BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
return boost::report_errors();
}