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
38