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

   1 // Copyright (C) 2020-2024 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 <testsuite_hooks.h>
  22 #include <testsuite_iterators.h>
  23
  24 using __gnu_test::test_container;
  25 using __gnu_test::test_range;
  26 using __gnu_test::input_iterator_wrapper;
  27 using __gnu_test::forward_iterator_wrapper;
  28 using __gnu_test::bidirectional_iterator_wrapper;
  29
  30 namespace ranges = std::ranges;
  31
  32 struct X
  33 {
  34   int i;
  35   int moved = 0;
  36
  37   constexpr X(int a) : i(a) { }
  38
  39   constexpr X(const X&) = delete;
  40   constexpr X& operator=(const X&) = delete;
  41
  42   constexpr X(X&& other)
  43   {
  44     *this = std::move(other);
  45   }
  46
  47   constexpr X&
  48   operator=(X&& other)
  49   {
  50     other.moved++;
  51     i = other.i;
  52     return *this;
  53   }
  54
  55   friend constexpr bool
  56   operator==(const X& a, const X& b)
  57   { return a.i == b.i; }
  58 };
  59
  60 void
  61 test01()
  62 {
  63     {
  64       X x[7] = { 1, 2, 3, 4, 5, 6, 7 };
  65       X y[7] = { 2, 4, 3, 5, 8, 9, 1 };
  66       X z[7] = { 1, 2, 3, 4, 5, 6, 7 };
  67       X w[7] = { 2, 4, 3, 5, 8, 9, 1 };
  68       auto [x_iter, y_iter] = ranges::swap_ranges(x, y);
  69       VERIFY( ranges::equal(y, z) && x_iter == x+7 && y_iter == y+7 );
  70       VERIFY( ranges::equal(x, w) );
  71     }
  72
  73     {
  74       int x[3] = { 1, 2, 3 };
  75       int y[4] = { 2, 4, 6, 0 };
  76       int z[3] = { 1, 2, 3 };
  77       int w[3] = { 2, 4, 6 };
  78       test_container<int, forward_iterator_wrapper> cx(x);
  79       test_container<int, forward_iterator_wrapper> cy(y);
  80       auto [x_iter, y_iter] = ranges::swap_ranges(cx, cy);
  81       VERIFY( ranges::equal(y, y+3, z, z+3) );
  82       VERIFY( x_iter.ptr == x+3 && y_iter.ptr == y+3 );
  83       VERIFY( y[3] == 0 );
  84       VERIFY( ranges::equal(x, w) );
  85     }
  86
  87     {
  88       int x[3] = { 1, 2, 3 };
  89       int y[4] = { 2, 4, 6, 0 };
  90       int z[3] = { 1, 2, 3 };
  91       int w[3] = { 2, 4, 6 };
  92       test_range<int, input_iterator_wrapper> cx(x);
  93       test_range<int, input_iterator_wrapper> cy(y);
  94       auto [y_iter, x_iter] = ranges::swap_ranges(cy, cx);
  95       VERIFY( ranges::equal(y, y+3, z, z+3) );
  96       VERIFY( x_iter.ptr == x+3 && y_iter.ptr == y+3 );
  97       VERIFY( y[3] == 0 );
  98       VERIFY( ranges::equal(x, w) );
  99     }
 100 }
 101
 102 constexpr bool
 103 test02()
 104 {
 105   bool ok = true;
 106   X x[7] = { 1, 2, 3, 4, 5, 6, 7 };
 107   X y[7] = { 2, 4, 3, 5, 8, 9, 1 };
 108   X z[7] = { 1, 2, 3, 4, 5, 6, 7 };
 109   X w[7] = { 2, 4, 3, 5, 8, 9, 1 };
 110   auto [x_iter, y_iter] = ranges::swap_ranges(x, y);
 111   ok &= ranges::equal(y, z) && x_iter == x+7 && y_iter == y+7;
 112   ok &= ranges::equal(x, w);
 113   return ok;
 114 }
 115
 116 int
 117 main()
 118 {
 119   test01();
 120   static_assert(test02());
 121 }
 122
 123