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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <concepts> 10 #include <format> 11 #include <utility> 12 13 #include "test_macros.h" 14 15 /// Returns whether the basic_format_arg contains a type T with the expected value. 16 template <class Context, class T> 17 bool test_basic_format_arg(std::basic_format_arg<Context> arg, T expected) { 18 auto visitor = [expected](auto a) { 19 if constexpr (std::same_as<decltype(a), T>) 20 return a == expected; 21 else 22 return false; 23 }; 24 #if TEST_STD_VER >= 26 && defined(TEST_HAS_EXPLICIT_THIS_PARAMETER) 25 return arg.visit(std::move(visitor)); 26 #else 27 return std::visit_format_arg(std::move(visitor), arg); 28 #endif 29 } 30