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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#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.16template <class Context, class T>17bool 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 else22 return false;23 };24#if TEST_STD_VER >= 2625 return arg.visit(std::move(visitor));26#else27 return std::visit_format_arg(std::move(visitor), arg);28#endif29}30