forked from OSchip/llvm-project
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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>();
|
|
}
|