| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef SUPPORT_TEST_FORMAT_STRING_HPP |
| #define SUPPORT_TEST_FORMAT_STRING_HPP |
| |
| #include <concepts> |
| #include <format> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| #if TEST_STD_VER < 20 |
| # error "The format header requires at least C++20" |
| #endif |
| |
| // Wrapper for basic_format_string. |
| // |
| // This layer of indirection is used since it's not possible to use |
| // std::basic_format_string<CharT, Args...> in the test function directly. |
| // |
| // In C++20 the basic-format-string was an exposition only type. In C++23 is |
| // has been replaced with basic_format_string. Both libc++ and MSVC STL offer |
| // it as an extension in C++20. |
| #if TEST_STD_VER > 20 || defined(_LIBCPP_VERSION) || defined(_MSVC_STL_VERSION) |
| # ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| template <class CharT, class... Args> |
| using test_format_string = |
| std::conditional_t<std::same_as<CharT, char>, std::format_string<Args...>, std::wformat_string<Args...>>; |
| # else |
| template <class CharT, class... Args> |
| using test_format_string = std::format_string<Args...>; |
| # endif |
| |
| #else // TEST_STD_VER > 20 || defined(_LIBCPP_VERSION) || defined( _MSVC_STL_VERSION) |
| |
| # error |
| "Please create a vendor specific version of the test typedef and file a review at https://reviews.llvm.org/" |
| |
| #endif // TEST_STD_VER > 20 || defined(_LIBCPP_VERSION) || defined( _MSVC_STL_VERSION) |
| |
| #endif // SUPPORT_TEST_FORMAT_STRING_HPP |