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 <__memory/shared_ptr.h>
11#include <__utility/unreachable.h>
12#include <filesystem>
13#include <system_error>
14
15#include "format_string.h"
16
17_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
18
19filesystem_error::~filesystem_error() {}
20
21void filesystem_error::__create_what(int __num_paths) {
22  const char* derived_what = system_error::what();
23  __storage_->__what_      = [&]() -> string {
24    switch (__num_paths) {
25    case 0:
26      return detail::format_string("filesystem error: %s", derived_what);
27    case 1:
28      return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "]", derived_what, path1().c_str());
29    case 2:
30      return detail::format_string(
31          "filesystem error: %s [" PATH_CSTR_FMT "] [" PATH_CSTR_FMT "]",
32          derived_what,
33          path1().c_str(),
34          path2().c_str());
35    }
36    __libcpp_unreachable();
37  }();
38}
39
40_LIBCPP_END_NAMESPACE_FILESYSTEM