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