libstdc++-v3/testsuite/25_algorithms/includes/constrained.cc

   1 // Copyright (C) 2020-2025 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-do run { target c++20 } }
  19
  20 #include <algorithm>
  21 #include <functional>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_iterators.h>
  24
  25 using __gnu_test::test_container;
  26 using __gnu_test::test_range;
  27 using __gnu_test::input_iterator_wrapper;
  28 using __gnu_test::forward_iterator_wrapper;
  29
  30 namespace ranges = std::ranges;
  31
  32 void
  33 test01()
  34 {
  35   int x[] = {1,2,3,4,5,6,7};
  36   int y[] = {2,4,6};
  37   test_range<int, input_iterator_wrapper> rx(x), ry(y);
  38
  39   VERIFY( ranges::includes(rx, ry) );
  40
  41   rx.bounds.first = x;
  42   ry.bounds.first = y;
  43   VERIFY( ranges::includes(rx, ry,
  44                            ranges::greater{},
  45                            std::negate<>{},
  46                            std::negate<>{}) );
  47
  48   test_container<int, forward_iterator_wrapper> cx(x), cy(y);
  49   VERIFY( ranges::includes(cx.begin(), cx.end(),
  50                            cy.begin(), cy.end(),
  51                            {},
  52                            [] (int a) { return a+1; },
  53                            [] (int a) { return a+2; }) );
  54
  55   VERIFY( ranges::includes(x, x+1, y, y) );
  56 }
  57
  58 constexpr bool
  59 test03()
  60 {
  61   bool ok = true;
  62   ok &= ranges::includes((int[]){1,2,3},
  63                          (int[]){1});
  64   ok &= !ranges::includes((int[]){1,2,3},
  65                           (int[]){1,2,3,4});
  66   return true;
  67 }
  68
  69 int
  70 main()
  71 {
  72   test01();
  73   static_assert(test03());
  74 }