libcxx/src/filesystem/filesystem_error.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <__config>
  10 #include <__utility/unreachable.h>
  11 #include <filesystem>
  12 #include <system_error>
  13
  14 #include "format_string.h"
  15
  16 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
  17
  18 filesystem_error::~filesystem_error() {}
  19
  20 void filesystem_error::__create_what(int __num_paths) {
  21   const char* derived_what = system_error::what();
  22   __storage_->__what_ = [&]() -> string {
  23     switch (__num_paths) {
  24     case 0:
  25       return detail::format_string("filesystem error: %s", derived_what);
  26     case 1:
  27       return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "]",
  28                                    derived_what, path1().c_str());
  29     case 2:
  30       return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "] [" PATH_CSTR_FMT "]",
  31                                    derived_what, path1().c_str(), path2().c_str());
  32     }
  33     __libcpp_unreachable();
  34   }();
  35 }
  36
  37 _LIBCPP_END_NAMESPACE_FILESYSTEM