46 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <system_error>10 11// class error_code12 13// template <ErrorCodeEnum E> error_code& operator=(E e);14 15#include <system_error>16#include <cassert>17#include <type_traits>18 19#include "test_macros.h"20 21enum testing22{23 zero, one, two24};25 26template <>27struct std::is_error_code_enum<testing> : public std::true_type {};28 29std::error_code30make_error_code(testing x)31{32 return std::error_code(static_cast<int>(x), std::generic_category());33}34 35int main(int, char**)36{37 {38 std::error_code ec;39 ec = two;40 assert(ec.value() == 2);41 assert(ec.category() == std::generic_category());42 }43 44 return 0;45}46