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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <functional>
// template <class T>
// struct hash
// : public unary_function<T, size_t>
// {
// size_t operator()(T val) const;
// };
// Not very portable
#include <functional>
#include <cassert>
#include <type_traits>
#include <limits>
template <class T>
void
test()
{
static_assert((std::is_base_of<std::unary_function<T, std::size_t>,
std::hash<T> >::value), "");
std::hash<T> h;
for (int i = 0; i <= 5; ++i)
{
T t(i);
if (sizeof(T) <= sizeof(std::size_t))
assert(h(t) == t);
}
}
int main()
{
test<bool>();
test<char>();
test<signed char>();
test<unsigned char>();
test<char16_t>();
test<char32_t>();
test<wchar_t>();
test<short>();
test<unsigned short>();
test<int>();
test<unsigned int>();
test<long>();
test<unsigned long>();
test<long long>();
test<unsigned long long>();
}
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