libstdc++-v3/testsuite/27_io/filesystem/path/decompose/filename.cc

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2014-2022 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // C++17 30.10.7.4.9 path decomposition [fs.path.decompose]
  21
  22 #include <filesystem>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_fs.h>
  25
  26 using std::filesystem::path;
  27
  28 void
  29 test01()
  30 {
  31   // [fs.path.decompose] p7
  32   VERIFY( path("/foo/bar.txt").filename() == "bar.txt" );
  33   VERIFY( path("/foo/bar").filename()     == "bar"     );
  34   VERIFY( path("/foo/bar/").filename()    == ""        );
  35   VERIFY( path("/").filename()            == ""        );
  36 #ifdef __CYGWIN__
  37   VERIFY( path("//host").filename()       == ""        );
  38 #else
  39   VERIFY( path("//host").filename()       == "host"    );
  40 #endif
  41   VERIFY( path(".").filename()            == "."       );
  42   VERIFY( path("..").filename()           == ".."      );
  43 }
  44
  45 void
  46 test02()
  47 {
  48   for (const path p : __gnu_test::test_paths)
  49   {
  50     path f = p.filename();
  51     if (p.empty())
  52       VERIFY( f.empty() );
  53     else
  54     {
  55       const path back = *--p.end();
  56       if (back.has_root_path())
  57         VERIFY( f.empty() );
  58       else
  59         VERIFY( f == back );
  60     }
  61   }
  62 }
  63
  64 int
  65 main()
  66 {
  67   test01();
  68   test02();
  69 }