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

   1 // { dg-options "-std=gnu++17 -lstdc++fs" }
   2 // { dg-do run { target c++17 } }
   3 // { dg-require-filesystem-ts "" }
   4
   5 // Copyright (C) 2014-2018 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 8.4.9 path decomposition [path.decompose]
  23
  24 #include <filesystem>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_fs.h>
  27
  28 using std::filesystem::path;
  29
  30 void
  31 test01()
  32 {
  33   path p1 = "foo";
  34   VERIFY( p1.relative_path() == p1 );
  35   path p2 = "foo/bar";
  36   VERIFY( p2.relative_path() == p2 );
  37   path p3 = "/foo/bar";
  38   VERIFY( p3.relative_path() == p2 );
  39 }
  40
  41 #include <iostream> // XXX
  42
  43 void
  44 test02()
  45 {
  46   for (const path& p : __gnu_test::test_paths)
  47   {
  48     bool after_root = false;
  49     const path prel = p.relative_path();
  50     VERIFY( !prel.has_root_name() );
  51     path rel;
  52     for (const auto& cmpt : p)
  53     {
  54       if (!cmpt.has_root_path())
  55         after_root = true;
  56       if (after_root)
  57         rel /= cmpt;
  58     }
  59     if (prel != rel)
  60       std::cout << prel << ' ' << rel << '\n';
  61     VERIFY( prel == rel );
  62   }
  63 }
  64
  65 int
  66 main()
  67 {
  68   test01();
  69   test02();
  70 }