libstdc++-v3/testsuite/27_io/filesystem/filesystem_error/copy.cc

   1 // Copyright (C) 2018-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++17 } }
  19 // { dg-require-filesystem-ts "" }
  20
  21 #include <filesystem>
  22 #include <testsuite_hooks.h>
  23
  24 using std::filesystem::filesystem_error;
  25
  26 // The COW std::string does not have noexcept copies, because copying a
  27 // "leaked" string can throw (and for fully-dynamic strings, copying the
  28 // empty rep can also throw).
  29 // That's OK, because we know that the std::string in the std::runtime_error
  30 // or std::logic_error base class won't be leaked (and usually won't be empty).
  31 // The is_nothrow_xxx type traits don't know that though, so we can only
  32 // check them for the cxx11 ABI, which uses __cow_string, which has noexcept
  33 // copies.
  34 #if _GLIBCXX_USE_CXX11_ABI
  35 // PR libstdc++/83306
  36 static_assert(std::is_nothrow_copy_constructible_v<filesystem_error>);
  37 static_assert(std::is_nothrow_copy_assignable_v<filesystem_error>);
  38 #endif
  39
  40 void
  41 test01()
  42 {
  43   const char* const str = "error test";
  44   const std::error_code ec = make_error_code(std::errc::is_a_directory);
  45   const filesystem_error e1(str, ec);
  46   auto e2 = e1;
  47   VERIFY( e2.path1().empty() );
  48   VERIFY( e2.path2().empty() );
  49   VERIFY( std::string_view(e2.what()).find(str) != std::string_view::npos );
  50   VERIFY( e2.code() == ec );
  51
  52   const filesystem_error e3(str, "test/path/one", ec);
  53   auto e4 = e3;
  54   VERIFY( e4.path1() == "test/path/one" );
  55   VERIFY( e4.path2().empty() );
  56   VERIFY( std::string_view(e4.what()).find(str) != std::string_view::npos );
  57   VERIFY( e2.code() == ec );
  58
  59   const filesystem_error e5(str, "test/path/one", "/test/path/two", ec);
  60   auto e6 = e5;
  61   VERIFY( e6.path1() == "test/path/one" );
  62   VERIFY( e6.path2() == "/test/path/two" );
  63   VERIFY( std::string_view(e6.what()).find(str) != std::string_view::npos );
  64   VERIFY( e2.code() == ec );
  65 }
  66
  67 void
  68 test02()
  69 {
  70   const char* const str = "error test";
  71   const std::error_code ec = make_error_code(std::errc::is_a_directory);
  72   const filesystem_error e1(str, ec);
  73   filesystem_error e2("", {});
  74   e2 = e1;
  75   VERIFY( e2.path1().empty() );
  76   VERIFY( e2.path2().empty() );
  77   VERIFY( std::string_view(e2.what()).find(str) != std::string_view::npos );
  78   VERIFY( e2.code() == ec );
  79
  80   const filesystem_error e3(str, "test/path/one", ec);
  81   filesystem_error e4("", {});
  82   e4 = e3;
  83   VERIFY( e4.path1() == "test/path/one" );
  84   VERIFY( e4.path2().empty() );
  85   VERIFY( std::string_view(e4.what()).find(str) != std::string_view::npos );
  86   VERIFY( e2.code() == ec );
  87
  88   const filesystem_error e5(str, "test/path/one", "/test/path/two", ec);
  89   filesystem_error e6("", {});
  90   e6 = e5;
  91   VERIFY( e6.path1() == "test/path/one" );
  92   VERIFY( e6.path2() == "/test/path/two" );
  93   VERIFY( std::string_view(e6.what()).find(str) != std::string_view::npos );
  94   VERIFY( e2.code() == ec );
  95 }
  96
  97 void
  98 test03()
  99 {
 100   filesystem_error e("test", std::error_code());
 101   VERIFY( e.path1().empty() );
 102   VERIFY( e.path2().empty() );
 103   auto e2 = std::move(e);
 104   // Observers must still be usable on moved-from object:
 105   VERIFY( e.path1().empty() );
 106   VERIFY( e.path2().empty() );
 107   VERIFY( e.what() != nullptr );
 108   e2 = std::move(e);
 109   VERIFY( e.path1().empty() );
 110   VERIFY( e.path2().empty() );
 111   VERIFY( e.what() != nullptr );
 112 }
 113
 114 int
 115 main()
 116 {
 117   test01();
 118   test02();
 119   test03();
 120 }