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 <__system_error/error_code.h>
18 #include <__system_error/system_error.h>
19 #include <__utility/forward.h>
20 #include <__verbose_abort>
21 #include <iosfwd>
22 #include <new>
23 #include <string>
24 
25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
26 #  pragma GCC system_header
27 #endif
28 
29 #ifndef _LIBCPP_CXX03_LANG
30 
31 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
32 
33 class _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_EXPORTED_FROM_ABI filesystem_error : public system_error {
34 public:
35   _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, error_code __ec)
36       : system_error(__ec, __what), __storage_(make_shared<_Storage>(path(), path())) {
37     __create_what(0);
38   }
39 
40   _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, error_code __ec)
41       : system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, path())) {
42     __create_what(1);
43   }
44 
45   _LIBCPP_HIDE_FROM_ABI filesystem_error(const string& __what, const path& __p1, const path& __p2, error_code __ec)
46       : system_error(__ec, __what), __storage_(make_shared<_Storage>(__p1, __p2)) {
47     __create_what(2);
48   }
49 
50   _LIBCPP_HIDE_FROM_ABI const path& path1() const noexcept { return __storage_->__p1_; }
51 
52   _LIBCPP_HIDE_FROM_ABI const path& path2() const noexcept { return __storage_->__p2_; }
53 
54   _LIBCPP_HIDE_FROM_ABI filesystem_error(const filesystem_error&) = default;
55   ~filesystem_error() override; // key function
56 
57   _LIBCPP_HIDE_FROM_ABI_VIRTUAL
58   const char* what() const noexcept override { return __storage_->__what_.c_str(); }
59 
60   void __create_what(int __num_paths);
61 
62 private:
63   struct _LIBCPP_HIDDEN _Storage {
64     _LIBCPP_HIDE_FROM_ABI _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
65 
66     path __p1_;
67     path __p2_;
68     string __what_;
69   };
70   shared_ptr<_Storage> __storage_;
71 };
72 
73 #  ifndef _LIBCPP_HAS_NO_EXCEPTIONS
74 template <class... _Args>
75 _LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
76 __throw_filesystem_error(_Args&&... __args) {
77   throw filesystem_error(_VSTD::forward<_Args>(__args)...);
78 }
79 #  else
80 template <class... _Args>
81 _LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY void
82 __throw_filesystem_error(_Args&&...) {
83   _LIBCPP_VERBOSE_ABORT("filesystem_error was thrown in -fno-exceptions mode");
84 }
85 #  endif
86 
87 _LIBCPP_END_NAMESPACE_FILESYSTEM
88 
89 #endif // _LIBCPP_CXX03_LANG
90 
91 #endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H
92