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ba87515fea
Currently, the library-internal feature test macros are only defined if the feature is not available, and always have the prefix `_LIBCPP_HAS_NO_`. This patch changes that, so that they are always defined and have the prefix `_LIBCPP_HAS_` instead. This changes the canonical use of these macros to `#if _LIBCPP_HAS_FEATURE`, which means that using an undefined macro (e.g. due to a missing include) is diagnosed now. While this is rather unlikely currently, a similar change in `<__configuration/availability.h>` caught a few bugs. This also improves readability, since it removes the double-negation of `#ifndef _LIBCPP_HAS_NO_FEATURE`. The current patch only touches the macros defined in `<__config>`. If people are happy with this approach, I'll make a follow-up PR to also change the macros defined in `<__config_site>`.
89 lines
2.9 KiB
C++
89 lines
2.9 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___FILESYSTEM_FILESYSTEM_ERROR_H
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#define _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
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#include <__config>
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#include <__filesystem/path.h>
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#include <__memory/shared_ptr.h>
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#include <__system_error/error_code.h>
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#include <__system_error/system_error.h>
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#include <__utility/forward.h>
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#include <__verbose_abort>
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#include <string>
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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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#if _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
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class _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_EXPORTED_FROM_ABI filesystem_error : public system_error {
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public:
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_LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, error_code __ec)
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: system_error(__ec, __what), __storage_(make_shared<_Storage>(path(), path())) {
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__create_what(0);
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}
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_LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, error_code __ec)
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: system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, path())) {
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__create_what(1);
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}
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_LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, const path& __p2, error_code __ec)
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: system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, __p2)) {
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__create_what(2);
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}
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_LIBCPP_HIDE_FROM_ABI const path& path1() const noexcept { return __storage_->__p1_; }
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_LIBCPP_HIDE_FROM_ABI const path& path2() const noexcept { return __storage_->__p2_; }
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_LIBCPP_HIDE_FROM_ABI filesystem_error(const filesystem_error&) = default;
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~filesystem_error() override; // key function
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_LIBCPP_HIDE_FROM_ABI_VIRTUAL
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const char* what() const noexcept override { return __storage_->__what_.c_str(); }
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void __create_what(int __num_paths);
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private:
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struct _LIBCPP_HIDDEN _Storage {
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_LIBCPP_HIDE_FROM_ABI _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
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path __p1_;
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path __p2_;
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string __what_;
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};
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shared_ptr<_Storage> __storage_;
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};
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# if _LIBCPP_HAS_EXCEPTIONS
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template <class... _Args>
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[[__noreturn__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
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__throw_filesystem_error(_Args&&... __args) {
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throw filesystem_error(std::forward<_Args>(__args)...);
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}
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# else
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template <class... _Args>
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[[__noreturn__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
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__throw_filesystem_error(_Args&&...) {
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_LIBCPP_VERBOSE_ABORT("filesystem_error was thrown in -fno-exceptions mode");
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}
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# endif
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_LIBCPP_END_NAMESPACE_FILESYSTEM
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#endif // _LIBCPP_STD_VER >= 17
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#endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
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