| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03, c++11 |
| // <system_error> |
| |
| // class error_category |
| |
| // constexpr error_category() noexcept; |
| |
| #include <system_error> |
| #include <type_traits> |
| #include <string> |
| #include <cassert> |
| |
| 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() |
| { |
| static_assert(std::is_nothrow_default_constructible<test1>::value, |
| "error_category() must exist and be noexcept"); |
| } |