1 // { dg-options "-std=gnu++17" }
2 // { dg-do run { target c++17 } }
3 
4 // Copyright (C) 2014-2020 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library.  This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 // GNU General Public License for more details.
16 
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3.  If not see
19 // <http://www.gnu.org/licenses/>.
20 
21 // 8.4.9 path decomposition [path.decompose]
22 
23 #include <filesystem>
24 #include <testsuite_hooks.h>
25 #include <testsuite_fs.h>
26 
27 using std::filesystem::path;
28 
29 void
test01()30 test01()
31 {
32   path p0;
33   VERIFY( p0.parent_path() == p0 );
34   path p1 = "foo";
35   VERIFY( p1.parent_path() == p0 );
36   path p2 = "foo/bar";
37   VERIFY( p2.parent_path() == p1 );
38   path p3 = "/foo/bar";
39   VERIFY( p3.parent_path() == path("/foo") );
40   VERIFY( p3.parent_path().parent_path() == path("/") );
41   VERIFY( p3.parent_path().parent_path().parent_path() == path("/") );
42   path p4 = "/";
43   VERIFY( p4.parent_path() == p4 );
44 }
45 
46 void
test02()47 test02()
48 {
49   for (const path& p : __gnu_test::test_paths)
50   {
51     if (p.begin() == p.end())
52       continue;
53     if (p.has_relative_path())
54     {
55       path pp;
56       for (auto i = p.begin(), end = --p.end(); i != end; ++i)
57       {
58 	pp /= *i;
59       }
60       VERIFY( p.parent_path() == pp );
61     }
62     else
63       VERIFY( p.parent_path() == p );
64   }
65 }
66 
67 int
main()68 main()
69 {
70   test01();
71   test02();
72 }
73