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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
// <charconv>
// struct from_chars_result
// constexpr explicit operator bool() const noexcept { return ec == errc{}; }
#include <charconv>
#include <cassert>
#include <system_error>
#include <type_traits>
#include "test_macros.h"
static_assert(!std::is_convertible_v<std::from_chars_result, bool>);
static_assert(std::is_constructible_v<bool, std::from_chars_result>);
constexpr bool test() {
// True
{
std::from_chars_result value{nullptr, std::errc{}};
assert(bool(value) == true);
static_assert(noexcept(bool(value)) == true);
}
// False
{
std::from_chars_result value{nullptr, std::errc::value_too_large};
assert(bool(value) == false);
static_assert(noexcept(bool(value)) == true);
}
return true;
}
int main(int, char**) {
assert(test());
static_assert(test());
return 0;
}
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