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()30test01() 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()47test02() 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()68main() 69 { 70 test01(); 71 test02(); 72 } 73