// Copyright 2021, 2022 Peter Dimov.

// Distributed under the Boost Software License, Version 1.0.

// https://www.boost.org/LICENSE_1_0.txt

#if defined(__GNUC__) && __GNUC__ == 8

# pragma GCC diagnostic ignored "-Wsign-conversion"

#endif

#include <boost/container_hash/hash.hpp>

#include <boost/core/lightweight_test.hpp>

#include <boost/config.hpp>

#include <boost/config/pragma_message.hpp>

#if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)

BOOST_PRAGMA_MESSAGE( "Test skipped, BOOST_NO_CXX11_HDR_UNORDERED_SET is defined" )

int main() {}

#elif defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && defined(_CPPLIB_VER) && _CPPLIB_VER >= 520

BOOST_PRAGMA_MESSAGE( "Test skipped, _CPPLIB_VER >= 520 and BOOST_NO_CXX11_VARIADIC_TEMPLATES is defined" )

int main() {}

#else

#include <unordered_set>

template<class T> void test()

{

typedef std::unordered_multiset<T> set;

typedef boost::hash<set> hash;

int const N = 32;

std::size_t h[ N ];

set v;

for( int i = 0; i < N; ++i )

{

h[ i ] = hash()( v );

BOOST_TEST_EQ( h[ i ], hash()( v ) );

for( int j = 0; j < i; ++j )

{

BOOST_TEST_NE( h[ j ], h[ i ] );

}

v.insert( T() );

}

}

int main()

{

test<int>();

test<float>();

test<double>();

return boost::report_errors();

}

#endif