d2baefae68
All supported compilers that support C++20 now support concepts. So, remove `_LIB_LIBCPP_HAS_NO_CONCEPTS` in favor of `_LIBCPP_STD_VER > 17`. Similarly in the tests, remove `// UNSUPPORTED: libcpp-no-concepts`. Differential Revision: https://reviews.llvm.org/D121528
57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// <charconv>
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// struct from_chars_result
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// friend bool operator==(const from_chars_result&, const from_chars_result&) = default;
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// [charconv.syn]/2
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// The types to_chars_result and from_chars_result have the data members and
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// special members specified above. They have no base classes or members other
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// than those specified.
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#include <charconv>
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#include <cassert>
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#include <compare>
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#include <concepts>
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#include "test_macros.h"
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constexpr bool test() {
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std::from_chars_result lhs{nullptr, std::errc{}};
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#if TEST_STD_VER > 17
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std::from_chars_result rhs{nullptr, std::errc{}};
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assert(lhs == rhs);
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assert(!(lhs != rhs));
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#endif
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auto [ptr, ec] = lhs;
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static_assert(std::is_same_v<decltype(ptr), const char*>);
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assert(ptr == lhs.ptr);
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static_assert(std::is_same_v<decltype(ec), std::errc>);
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assert(ec == lhs.ec);
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return true;
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}
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int main(int, char**) {
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#if TEST_STD_VER > 17
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static_assert(std::equality_comparable<std::from_chars_result>);
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static_assert(!std::totally_ordered<std::from_chars_result>);
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static_assert(!std::three_way_comparable<std::from_chars_result>);
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#endif
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assert(test());
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static_assert(test());
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return 0;
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}
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