e78f53d1e8
This reverts commit 68c04b0ae6.
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.
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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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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#ifndef _LIBCPP_SOURCE_LOCATION
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#define _LIBCPP_SOURCE_LOCATION
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/* source_location synopsis
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namespace std {
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struct source_location {
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static consteval source_location current() noexcept;
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constexpr source_location() noexcept;
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constexpr uint_least32_t line() const noexcept;
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constexpr uint_least32_t column() const noexcept;
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constexpr const char* file_name() const noexcept;
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constexpr const char* function_name() const noexcept;
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};
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}
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*/
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#include <__config>
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#include <cstdint>
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#include <version>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 20
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class source_location {
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// The names source_location::__impl, _M_file_name, _M_function_name, _M_line, and _M_column
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// are hard-coded in the compiler and must not be changed here.
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struct __impl {
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const char* _M_file_name;
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const char* _M_function_name;
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unsigned _M_line;
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unsigned _M_column;
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};
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const __impl* __ptr_ = nullptr;
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// GCC returns the type 'const void*' from the builtin, while clang returns
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// `const __impl*`. Per C++ [expr.const], casts from void* are not permitted
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// in constant evaluation, so we don't want to use `void*` as the argument
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// type unless the builtin returned that, anyhow, and the invalid cast is
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// unavoidable.
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using __bsl_ty = decltype(__builtin_source_location());
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public:
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// The defaulted __ptr argument is necessary so that the builtin is evaluated
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// in the context of the caller. An explicit value should never be provided.
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static consteval source_location current(__bsl_ty __ptr = __builtin_source_location()) noexcept {
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source_location __sl;
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__sl.__ptr_ = static_cast<const __impl*>(__ptr);
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return __sl;
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}
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_LIBCPP_HIDE_FROM_ABI constexpr source_location() noexcept = default;
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_LIBCPP_HIDE_FROM_ABI constexpr uint_least32_t line() const noexcept {
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return __ptr_ != nullptr ? __ptr_->_M_line : 0;
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}
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_LIBCPP_HIDE_FROM_ABI constexpr uint_least32_t column() const noexcept {
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return __ptr_ != nullptr ? __ptr_->_M_column : 0;
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}
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_LIBCPP_HIDE_FROM_ABI constexpr const char* file_name() const noexcept {
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return __ptr_ != nullptr ? __ptr_->_M_file_name : "";
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}
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_LIBCPP_HIDE_FROM_ABI constexpr const char* function_name() const noexcept {
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return __ptr_ != nullptr ? __ptr_->_M_function_name : "";
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}
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};
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_SOURCE_LOCATION
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