libstdc++-v3/testsuite/25_algorithms/is_permutation/1.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // 2011-01-13  Paolo Carlini  <paolo.carlini@oracle.com>
   4 //
   5 // Copyright (C) 2011-2025 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 25.2.12 [alg.is_permutation] Is permutation
  23
  24 #include <algorithm>
  25 #include <functional>
  26 #include <testsuite_hooks.h>
  27
  28 struct my_equal_to
  29 {
  30   bool
  31   operator()(int __x, int __y) const
  32   { return __x % 10 == __y % 10; }
  33 };
  34
  35 const int arr0[] = { 11, 22, 33, 44, 55 };
  36
  37 void
  38 do_test(int arr1[5], bool np = true)
  39 {
  40   do
  41     VERIFY( std::is_permutation(arr1, arr1 + 5, arr0) == np );
  42   while (std::next_permutation(arr1, arr1 + 5));
  43 }
  44
  45 template<typename Predicate>
  46   void
  47   do_test(int arr1[5], Predicate pred, bool np = true)
  48   {
  49     do
  50       VERIFY( std::is_permutation(arr1, arr1 + 5, arr0, pred) == np );
  51     while (std::next_permutation(arr1, arr1 + 5));
  52   }
  53
  54 void test01()
  55 {
  56   int arr1[] = { 11, 22, 33, 44, 55 };
  57   do_test(arr1);
  58
  59   int arr2[] = { 11, 33, 33, 44, 55 };
  60   do_test(arr2, false);
  61
  62   int arr3[] = { 33, 33, 33, 44, 44 };
  63   do_test(arr3, false);
  64
  65   int arr4[] = { 11, 22, 33, 44, 55 };
  66   do_test(arr4, std::equal_to<int>());
  67
  68   int arr5[] = { 11, 33, 33, 44, 55 };
  69   do_test(arr5, std::equal_to<int>(), false);
  70
  71   int arr6[] = { 33, 33, 33, 44, 44 };
  72   do_test(arr6, std::equal_to<int>(), false);
  73
  74   int arr7[] = { 1, 2, 3, 4, 5 };
  75   do_test(arr7, my_equal_to());
  76
  77   int arr8[] = { 1, 3, 3, 4, 5 };
  78   do_test(arr8, my_equal_to(), false);
  79
  80   int arr9[] = { 3, 3, 3, 4, 4 };
  81   do_test(arr9, my_equal_to(), false);
  82
  83   int arr10[] = { 111, 222, 333, 444, 555 };
  84   do_test(arr10, my_equal_to());
  85
  86   int arr11[] = { 1, 222, 33, 4, 55 };
  87   do_test(arr11, my_equal_to());
  88
  89   int arr12[] = { 111, 333, 333, 444, 555 };
  90   do_test(arr12, my_equal_to(), false);
  91
  92   int arr13[] = { 333, 333, 333, 444, 444 };
  93   do_test(arr13, my_equal_to(), false);
  94 }
  95
  96 int main()
  97 {
  98   test01();
  99   return 0;
 100 }