7d9b5aa65b
Implements parts of: `P2637R3` https://wg21.link/P2637R3 (https://eel.is/c++draft/variant.visit) Implements: `basic_format_arg.visit()` `basic_format_arg.visit<R>()` Deprecates: `std::visit_format_arg()` The tests are as close as possible to the non-member function tests. To land after: https://github.com/llvm/llvm-project/pull/76447, https://github.com/llvm/llvm-project/pull/76268 --------- Co-authored-by: Zingam <zingam@outlook.com>
29 lines
974 B
C++
29 lines
974 B
C++
//===----------------------------------------------------------------------===//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <concepts>
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#include <format>
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#include <utility>
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#include "test_macros.h"
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/// Returns whether the basic_format_arg contains a type T with the expected value.
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template <class Context, class T>
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bool test_basic_format_arg(std::basic_format_arg<Context> arg, T expected) {
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auto visitor = [expected](auto a) {
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if constexpr (std::same_as<decltype(a), T>)
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return a == expected;
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else
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return false;
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};
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#if TEST_STD_VER >= 26 && defined(TEST_HAS_EXPLICIT_THIS_PARAMETER)
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return arg.visit(std::move(visitor));
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#else
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return std::visit_format_arg(std::move(visitor), arg);
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#endif
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}
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