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 <__availability>
14 #include <__config>
15 #include <__filesystem/path.h>
16 #include <__memory/shared_ptr.h>
17 #include <__utility/forward.h>
18 #include <iosfwd>
19 #include <new>
20 #include <system_error>
21 #include <type_traits>
22 
23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24 #  pragma GCC system_header
25 #endif
26 
27 #ifndef _LIBCPP_CXX03_LANG
28 
29 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
30 
31 class _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error {
32 public:
33   _LIBCPP_INLINE_VISIBILITY
34   filesystem_error(const string& __what, error_code __ec)
35       : system_error(__ec, __what),
36         __storage_(make_shared<_Storage>(path(), path())) {
37     __create_what(0);
38   }
39 
40   _LIBCPP_INLINE_VISIBILITY
41   filesystem_error(const string& __what, const path& __p1, error_code __ec)
42       : system_error(__ec, __what),
43         __storage_(make_shared<_Storage>(__p1, path())) {
44     __create_what(1);
45   }
46 
47   _LIBCPP_INLINE_VISIBILITY
48   filesystem_error(const string& __what, const path& __p1, const path& __p2,
49                    error_code __ec)
50       : system_error(__ec, __what),
51         __storage_(make_shared<_Storage>(__p1, __p2)) {
52     __create_what(2);
53   }
54 
55   _LIBCPP_INLINE_VISIBILITY
56   const path& path1() const noexcept { return __storage_->__p1_; }
57 
58   _LIBCPP_INLINE_VISIBILITY
59   const path& path2() const noexcept { return __storage_->__p2_; }
60 
61   filesystem_error(const filesystem_error&) = default;
62   ~filesystem_error() override; // key function
63 
64   _LIBCPP_HIDE_FROM_ABI_VIRTUAL
65   const char* what() const noexcept override {
66     return __storage_->__what_.c_str();
67   }
68 
69   void __create_what(int __num_paths);
70 
71 private:
72   struct _LIBCPP_HIDDEN _Storage {
73     _LIBCPP_INLINE_VISIBILITY
74     _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
75 
76     path __p1_;
77     path __p2_;
78     string __what_;
79   };
80   shared_ptr<_Storage> __storage_;
81 };
82 
83 // TODO(ldionne): We need to pop the pragma and push it again after
84 //                filesystem_error to work around PR41078.
85 _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
86 
87 template <class... _Args>
88 _LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
89 #ifndef _LIBCPP_NO_EXCEPTIONS
90 void __throw_filesystem_error(_Args&&... __args) {
91   throw filesystem_error(_VSTD::forward<_Args>(__args)...);
92 }
93 #else
94 void __throw_filesystem_error(_Args&&...) {
95   _VSTD::abort();
96 }
97 #endif
98 _LIBCPP_AVAILABILITY_FILESYSTEM_POP
99 
100 _LIBCPP_END_NAMESPACE_FILESYSTEM
101 
102 #endif // _LIBCPP_CXX03_LANG
103 
104 #endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
105