1// -*- C++ -*-
 2//===----------------------------------------------------------------------===//
 3//
 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 5// See https://llvm.org/LICENSE.txt for license information.
 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 7//
 8//===----------------------------------------------------------------------===//
 9
10#ifndef _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
11#define _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
12
13#include <__config>
14#include <__filesystem/path.h>
15#include <__memory/shared_ptr.h>
16#include <__system_error/error_code.h>
17#include <__system_error/system_error.h>
18#include <__utility/forward.h>
19#include <__verbose_abort>
20#include <string>
21
22#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
23#  pragma GCC system_header
24#endif
25
26#if _LIBCPP_STD_VER >= 17
27
28_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
29
30class _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_EXPORTED_FROM_ABI filesystem_error : public system_error {
31public:
32  _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, error_code __ec)
33      : system_error(__ec, __what), __storage_(make_shared<_Storage>(path(), path())) {
34    __create_what(0);
35  }
36
37  _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, error_code __ec)
38      : system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, path())) {
39    __create_what(1);
40  }
41
42  _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, const path& __p2, error_code __ec)
43      : system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, __p2)) {
44    __create_what(2);
45  }
46
47  _LIBCPP_HIDE_FROM_ABI const path& path1() const noexcept { return __storage_->__p1_; }
48
49  _LIBCPP_HIDE_FROM_ABI const path& path2() const noexcept { return __storage_->__p2_; }
50
51  _LIBCPP_HIDE_FROM_ABI filesystem_error(const filesystem_error&) = default;
52  ~filesystem_error() override; // key function
53
54  _LIBCPP_HIDE_FROM_ABI_VIRTUAL
55  const char* what() const noexcept override { return __storage_->__what_.c_str(); }
56
57  void __create_what(int __num_paths);
58
59private:
60  struct _LIBCPP_HIDDEN _Storage {
61    _LIBCPP_HIDE_FROM_ABI _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
62
63    path __p1_;
64    path __p2_;
65    string __what_;
66  };
67  shared_ptr<_Storage> __storage_;
68};
69
70#  if _LIBCPP_HAS_EXCEPTIONS
71template <class... _Args>
72[[__noreturn__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
73__throw_filesystem_error(_Args&&... __args) {
74  throw filesystem_error(std::forward<_Args>(__args)...);
75}
76#  else
77template <class... _Args>
78[[__noreturn__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
79__throw_filesystem_error(_Args&&...) {
80  _LIBCPP_VERBOSE_ABORT("filesystem_error was thrown in -fno-exceptions mode");
81}
82#  endif
83
84_LIBCPP_END_NAMESPACE_FILESYSTEM
85
86#endif // _LIBCPP_STD_VER >= 17
87
88#endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H