libstdc++-v3/testsuite/27_io/filesystem/path/generation/proximate.cc

   1 // Copyright (C) 2017-2020 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-options "-std=gnu++17" }
  19 // { dg-do run { target c++17 } }
  20
  21 #include <filesystem>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_fs.h>
  24
  25 using std::filesystem::path;
  26 using __gnu_test::compare_paths;
  27
  28 // Normalize directory-separators
  29 std::string operator""_norm(const char* s, std::size_t n)
  30 {
  31   std::string str(s, n);
  32 #if defined(__MING32__) || defined(__MINGW64__)
  33   for (auto& c : str)
  34     if (c == '/')
  35       c = '\\';
  36 #endif
  37   return str;
  38 }
  39
  40 void
  41 test01()
  42 {
  43   // C++17 [fs.path.gen] p5
  44   compare_paths( path("/a/d").lexically_proximate("/a/b/c"), "../../d"_norm );
  45   compare_paths( path("/a/b/c").lexically_proximate("/a/d"), "../b/c"_norm );
  46   compare_paths( path("a/b/c").lexically_proximate("a"), "b/c"_norm );
  47   compare_paths( path("a/b/c").lexically_proximate("a/b/c/x/y"), "../.."_norm );
  48   compare_paths( path("a/b/c").lexically_proximate("a/b/c"), "."_norm );
  49   compare_paths( path("a/b").lexically_proximate("c/d"), "../../a/b"_norm );
  50 }
  51
  52 void
  53 test02()
  54 {
  55   path p = "a/b/c";
  56   compare_paths( p.lexically_proximate(p), "." );
  57   compare_paths( p.lexically_proximate("a/../a/b/../b/c/../c/."),
  58                  "../../b/c"_norm );
  59   compare_paths( p.lexically_proximate("../../../"), p );
  60 }
  61
  62 int
  63 main()
  64 {
  65   test01();
  66   test02();
  67 }