Nikolas Klauser e78f53d1e8
Reapply "[libc++][C++03] Copy the LLVM 19 headers (#108999)" (#112127)
This reverts commit 68c04b0ae62d8431d72d8b47fc13008002ee4387.

This disables the IWYU mapping that caused the failure, since
the headers aren't reachable for now.

This is the first part of the "Freezing C++03 headers" proposal
explained in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58.

This patch mechanically copies the headers as of the LLVM 19.1 release
into a subdirectory of libc++ so that we can start using these headers
when building in C++03 mode. We are going to be backporting important
changes to that copy of the headers until the LLVM 21 release. After the
LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy
of the headers.

This patch only performs a copy of the headers -- these headers are
still unused by the rest of the codebase.
2024-10-24 00:17:37 +02:00

63 lines
1.6 KiB
C++

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_EXPECTED
#define _LIBCPP_EXPECTED
/*
Header <expected> synopsis
namespace std {
// [expected.unexpected], class template unexpected
template<class E> class unexpected;
// [expected.bad], class template bad_expected_access
template<class E> class bad_expected_access;
// [expected.bad.void], specialization for void
template<> class bad_expected_access<void>;
// in-place construction of unexpected values
struct unexpect_t {
explicit unexpect_t() = default;
};
inline constexpr unexpect_t unexpect{};
// [expected.expected], class template expected
template<class T, class E> class expected;
// [expected.void], partial specialization of expected for void types
template<class T, class E> requires is_void_v<T> class expected<T, E>;
}
*/
#include <__config>
#if _LIBCPP_STD_VER >= 23
# include <__expected/bad_expected_access.h>
# include <__expected/expected.h>
# include <__expected/unexpect.h>
# include <__expected/unexpected.h>
#endif
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <cstddef>
# include <initializer_list>
# include <new>
#endif
#endif // _LIBCPP_EXPECTED