libcxx/include/__filesystem/filesystem_error.h

   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