1 //===----------------------------------------------------------------------===// 2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 3 // See https://llvm.org/LICENSE.txt for license information. 4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 5 // 6 //===----------------------------------------------------------------------===// 7 8 #include <concepts> 9 #include <format> 10 #include <utility> 11 12 #include "test_macros.h" 13 14 /// Returns whether the basic_format_arg contains a type T with the expected value. 15 template <class Context, class T> 16 bool test_basic_format_arg(std::basic_format_arg<Context> arg, T expected) { 17 auto visitor = [expected](auto a) { 18 if constexpr (std::same_as<decltype(a), T>) 19 return a == expected; 20 else 21 return false; 22 }; 23 #if TEST_STD_VER >= 26 && defined(TEST_HAS_EXPLICIT_THIS_PARAMETER) 24 return arg.visit(std::move(visitor)); 25 #else 26 return std::visit_format_arg(std::move(visitor), arg); 27 #endif 28 } 29