//===----------------------------------------------------------------------===//
//
// 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
// <system_error>
// class error_category
// constexpr error_category() noexcept;
#include <system_error>
#include <type_traits>
#include <string>
#include <cassert>
#include "test_macros.h"
class test1
: public std::error_category
{
public:
constexpr test1() = default; // won't compile if error_category() is not constexpr
virtual const char* name() const noexcept {return nullptr;}
virtual std::string message(int) const {return std::string();}
};
int main(int, char**)
{
static_assert(std::is_nothrow_default_constructible<test1>::value,
"error_category() must exist and be noexcept");
return 0;
}