forked from mirror/libcxx
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.3 KiB
C++
56 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 <string>
|
|
#include <cassert>
|
|
#include <type_traits>
|
|
|
|
#include "test_macros.h"
|
|
|
|
template <class T>
|
|
void
|
|
test()
|
|
{
|
|
typedef std::hash<T> H;
|
|
static_assert((std::is_same<typename H::argument_type, T>::value), "" );
|
|
static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
|
|
ASSERT_NOEXCEPT(H()(T()));
|
|
|
|
H h;
|
|
std::string g1 = "1234567890";
|
|
std::string g2 = "1234567891";
|
|
T s1(g1.begin(), g1.end());
|
|
T s2(g2.begin(), g2.end());
|
|
assert(h(s1) != h(s2));
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test<std::string>();
|
|
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
|
|
test<std::u8string>();
|
|
#endif
|
|
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
|
|
test<std::u16string>();
|
|
test<std::u32string>();
|
|
#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
|
|
test<std::wstring>();
|
|
}
|