| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // template <class T> |
| // struct hash |
| // : public unary_function<T, size_t> |
| // { |
| // size_t operator()(T val) const; |
| // }; |
| |
| // Not very portable |
| |
| #include <string_view> |
| #include <string> |
| #include <cassert> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| using std::string_view; |
| |
| template <class SV> |
| void |
| test() |
| { |
| typedef std::hash<SV> H; |
| static_assert((std::is_same<typename H::argument_type, SV>::value), "" ); |
| static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" ); |
| |
| typedef typename SV::value_type char_type; |
| typedef std::basic_string<char_type> String; |
| typedef std::hash<String> SH; |
| ASSERT_NOEXCEPT(H()(SV())); |
| |
| char_type g1 [ 10 ]; |
| char_type g2 [ 10 ]; |
| for ( int i = 0; i < 10; ++i ) |
| g1[i] = g2[9-i] = static_cast<char_type>('0' + i); |
| H h; |
| SH sh; |
| SV s1(g1, 10); |
| String ss1(s1); |
| SV s2(g2, 10); |
| String ss2(s2); |
| assert(h(s1) == h(s1)); |
| assert(h(s1) != h(s2)); |
| assert(sh(ss1) == h(s1)); |
| assert(sh(ss2) == h(s2)); |
| } |
| |
| int main(int, char**) |
| { |
| test<std::string_view>(); |
| #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L |
| test<std::u8string_view>(); |
| #endif |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| test<std::u16string_view>(); |
| test<std::u32string_view>(); |
| #endif |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test<std::wstring_view>(); |
| #endif |
| |
| return 0; |
| } |