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Add owner_hash

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This commit is contained in:
Peter Dimov
2020-06-05 18:45:00 +03:00
parent 1c61e54b13
commit fad0c20263
3 changed files with 117 additions and 0 deletions
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27
include/boost/smart_ptr/owner_hash.hpp Normal file
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#ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
#define BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
// Copyright 2020 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/config.hpp>
#include <cstddef>
namespace boost
{
template<class T> struct owner_hash
{
typedef std::size_t result_type;
typedef T argument_type;
std::size_t operator()( T const & t ) const BOOST_NOEXCEPT
{
return t.owner_hash_value();
}
};
} // namespace boost
#endif // #ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED

2
test/Jamfile
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@ -405,3 +405,5 @@ run wp_hash_test.cpp ;
run wp_hash_test2.cpp ;
run wp_unordered_test.cpp ;
run owner_hash_test.cpp ;

88
test/owner_hash_test.cpp Normal file
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// Copyright 2020 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/smart_ptr/owner_hash.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <boost/core/lightweight_test.hpp>
template<class T> std::size_t hash( T const& t )
{
return boost::owner_hash<T>()( t );
}
int main()
{
boost::shared_ptr<int> p1( new int );
boost::shared_ptr<int> p2( p1 );
BOOST_TEST_EQ( hash( p1 ), hash( p2 ) );
boost::shared_ptr<int> p3( new int );
BOOST_TEST_NE( hash( p1 ), hash( p3 ) );
boost::shared_ptr<int> p4;
boost::shared_ptr<int> p5;
BOOST_TEST_EQ( hash( p4 ), hash( p5 ) );
BOOST_TEST_NE( hash( p4 ), hash( p3 ) );
boost::shared_ptr<int> p6( static_cast<int*>(0) );
BOOST_TEST_NE( hash( p4 ), hash( p6 ) );
boost::shared_ptr<void> p7( p1 );
BOOST_TEST_EQ( hash( p1 ), hash( p7 ) );
boost::shared_ptr<void> p8;
BOOST_TEST_NE( hash( p1 ), hash( p8 ) );
BOOST_TEST_EQ( hash( p4 ), hash( p8 ) );
boost::weak_ptr<int> q1( p1 );
BOOST_TEST_EQ( hash( p1 ), hash( q1 ) );
boost::weak_ptr<int> q2( p1 );
BOOST_TEST_EQ( hash( q1 ), hash( q2 ) );
boost::weak_ptr<int> q3( p3 );
BOOST_TEST_NE( hash( p1 ), hash( q3 ) );
BOOST_TEST_NE( hash( q1 ), hash( q3 ) );
boost::weak_ptr<int> q4;
BOOST_TEST_EQ( hash( p4 ), hash( q4 ) );
BOOST_TEST_NE( hash( q1 ), hash( q4 ) );
boost::weak_ptr<void> q5;
BOOST_TEST_EQ( hash( q4 ), hash( q5 ) );
boost::weak_ptr<void> q7( p7 );
BOOST_TEST_EQ( hash( p1 ), hash( q7 ) );
BOOST_TEST_EQ( hash( q1 ), hash( q7 ) );
p1.reset();
p2.reset();
p3.reset();
p7.reset();
BOOST_TEST( q1.expired() );
BOOST_TEST( q2.expired() );
BOOST_TEST( q3.expired() );
BOOST_TEST( q7.expired() );
BOOST_TEST_EQ( hash( q1 ), hash( q2 ) );
BOOST_TEST_EQ( hash( q1 ), hash( q7 ) );
BOOST_TEST_NE( hash( q1 ), hash( q3 ) );
BOOST_TEST_NE( hash( q1 ), hash( q4 ) );
return boost::report_errors();
}