0922ce56f4
This implements the struct `__format_arg_store` and its dependencies: * the class basic_format_arg, * the class basic_format_args, * the class basic_format_context, * the function make_format_args, * the function wmake_format_args, * the function visit_format_arg, * several Standard required typedefs. The following parts will be implemented in a later patch: * the child class `basic_format_arg::handle`, * the function `basic_format_arg::basic_format_arg(const T* p)`. The following extension has been implemented: * the class basic_format_arg supports `__[u]int128_t` on platform where libc++ supports 128 bit integrals. Implements parts of: * P0645 Text Formatting Completes: * LWG3371 visit_format_arg and make_format_args are not hidden friends * LWG3542 basic_format_arg mishandles basic_string_view with custom traits Note https://mordante.github.io/blog/2021/06/05/format.html gives a bit more information about the goals and non-goals of this initial patch series. Reviewed By: #libc, ldionne, vitaut Differential Revision: https://reviews.llvm.org/D103357
25 lines
830 B
C++
25 lines
830 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 "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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return std::visit_format_arg(
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[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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arg);
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}
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