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 // UNSUPPORTED: c++03, c++11, c++14 10 11 // <charconv> 12 13 // struct to_chars_result 14 // friend bool operator==(const to_chars_result&, const to_chars_result&) = default; 15 16 // [charconv.syn]/2 17 // The types to_chars_result and from_chars_result have the data members and 18 // special members specified above. They have no base classes or members other 19 // than those specified. 20 21 #include <charconv> 22 23 #include <cassert> 24 #include <compare> 25 #include <concepts> 26 #include <system_error> 27 #include <type_traits> 28 29 #include "test_macros.h" 30 31 constexpr bool test() { 32 std::to_chars_result lhs{nullptr, std::errc{}}; 33 #if TEST_STD_VER > 17 34 std::to_chars_result rhs{nullptr, std::errc{}}; 35 assert(lhs == rhs); 36 assert(!(lhs != rhs)); 37 #endif 38 auto [ptr, ec] = lhs; 39 static_assert(std::is_same_v<decltype(ptr), char*>); 40 assert(ptr == lhs.ptr); 41 static_assert(std::is_same_v<decltype(ec), std::errc>); 42 assert(ec == lhs.ec); 43 44 return true; 45 } 46 47 int main(int, char**) { 48 #if TEST_STD_VER > 17 49 static_assert(std::equality_comparable<std::to_chars_result>); 50 static_assert(!std::totally_ordered<std::to_chars_result>); 51 static_assert(!std::three_way_comparable<std::to_chars_result>); 52 #endif 53 54 assert(test()); 55 static_assert(test()); 56 57 return 0; 58 } 59