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// (C) Copyright John Maddock 2005.
// Use, modification and distribution are subject to 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)
#ifdef TEST_STD_HEADERS
#include <functional>
#else
#include <boost/tr1/functional.hpp>
#endif
#include <string>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_base_of.hpp>
#include "verify_return.hpp"
template <class T>
void check_hash(T t)
{
typedef std::tr1::hash<T> hash_type;
typedef typename hash_type::argument_type arg_type;
typedef typename hash_type::result_type result_type;
BOOST_STATIC_ASSERT((::boost::is_same<result_type, std::size_t>::value));
BOOST_STATIC_ASSERT((::boost::is_same<arg_type, T>::value));
BOOST_STATIC_ASSERT((::boost::is_base_of<std::unary_function<arg_type, result_type>, hash_type>::value));
hash_type h;
const hash_type& ch = h;
verify_return_type(ch(t), std::size_t(0));
}
class UDT;
int main()
{
check_hash(0);
check_hash(0u);
check_hash(0L);
check_hash(0uL);
check_hash(static_cast<short>(0));
check_hash(static_cast<unsigned short>(0));
check_hash(static_cast<signed char>(0));
check_hash(static_cast<unsigned char>(0));
check_hash(static_cast<char>(0));
check_hash(static_cast<wchar_t>(0));
check_hash(static_cast<bool>(0));
check_hash(static_cast<float>(0));
check_hash(static_cast<double>(0));
check_hash(static_cast<long double>(0));
check_hash(std::string(""));
check_hash(std::wstring(L""));
check_hash(static_cast<UDT*>(0));
check_hash(static_cast<const UDT*>(0));
check_hash(static_cast<volatile UDT*>(0));
check_hash(static_cast<const volatile UDT*>(0));
return 0;
}
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