1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <system_error> 10 // 11 // template <> 12 // struct hash<error_condition>; 13 14 #include <system_error> 15 #include <cassert> 16 #include <cstddef> 17 #include <functional> 18 #include <type_traits> 19 20 #include "test_macros.h" 21 22 void 23 test(int i) 24 { 25 typedef std::error_condition T; 26 typedef std::hash<T> H; 27 #if TEST_STD_VER <= 14 28 static_assert((std::is_same<H::argument_type, T>::value), "" ); 29 static_assert((std::is_same<H::result_type, std::size_t>::value), "" ); 30 #endif 31 ASSERT_NOEXCEPT(H()(T())); 32 H h; 33 T ec(i, std::system_category()); 34 const std::size_t result = h(ec); 35 LIBCPP_ASSERT(result == static_cast<std::size_t>(i)); 36 ((void)result); // Prevent unused warning 37 } 38 39 int main(int, char**) 40 { 41 test(0); 42 test(2); 43 test(10); 44 45 return 0; 46 } 47