libstdc++-v3/testsuite/25_algorithms/replace/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 <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
  29 namespace ranges = std::ranges;
  30
  31 struct X
  32 {
  33   int i;
  34
  35   friend constexpr bool
  36   operator==(const X& a, const X& b)
  37   {
  38     return a.i == b.i;
  39   }
  40 };
  41
  42 void
  43 test01()
  44 {
  45     {
  46       X x[6] = { {2}, {2}, {6}, {8}, {10}, {11} };
  47       X y[6] = { {2}, {2}, {6}, {9}, {10}, {11} };
  48       auto res = ranges::replace(x, x+5, 8, X{9}, &X::i);
  49       VERIFY( res == x+5 );
  50       VERIFY( ranges::equal(x, y) );
  51     }
  52
  53     {
  54       X x[6] = { {2}, {2}, {6}, {8}, {10}, {11} };
  55       X y[6] = { {2}, {2}, {6}, {8}, {10}, {11} };
  56       auto res = ranges::replace(x, x+5, 7, X{9}, &X::i);
  57       VERIFY( res == x+5 );
  58       VERIFY( ranges::equal(x, y) );
  59     }
  60
  61     {
  62       X x[6] = { {2}, {2}, {6}, {8}, {10}, {11} };
  63       X y[6] = { {7}, {7}, {6}, {8}, {10}, {11} };
  64       test_container<X, forward_iterator_wrapper> cx(x), cy(y);
  65       auto res = ranges::replace(cx, 2, X{7}, &X::i);
  66       VERIFY( res == cx.end() );
  67       VERIFY( ranges::equal(cx, cy) );
  68     }
  69
  70     {
  71       int x[6] = { {2}, {2}, {6}, {8}, {10}, {2} };
  72       int y[6] = { {7}, {7}, {6}, {8}, {10}, {7} };
  73       test_range<int, input_iterator_wrapper> rx(x), ry(y);
  74       auto res = ranges::replace(rx, 2, 7);
  75       VERIFY( res == rx.end() );
  76
  77       rx.bounds.first = x;
  78       ry.bounds.first = y;
  79       VERIFY( ranges::equal(rx, ry) );
  80     }
  81 }
  82
  83 struct Y { int i; int j; };
  84
  85 constexpr bool
  86 test02()
  87 {
  88   bool ok = true;
  89   Y x[] = { {3,2}, {2,4}, {3,6} };
  90   Y y[] = { {4,5}, {2,4}, {4,5} };
  91   auto res = ranges::replace(x, 3, Y{4,5}, &Y::i);
  92   ok &= res == x+3;
  93   ok &= ranges::equal(x, y, {}, &Y::i, &Y::i);
  94   ok &= ranges::equal(x, y, {}, &Y::j, &Y::j);
  95   return ok;
  96 }
  97
  98 int
  99 main()
 100 {
 101   test01();
 102   static_assert(test02());
 103 }