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

   1 // Copyright (C) 2005-2020 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 // 25.2.4 remove
  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::forward_iterator_wrapper;
  26
  27 typedef test_container<int, forward_iterator_wrapper> Container;
  28
  29 bool equal1(int val) { return val == 1; }
  30 bool equal0(int val) { return val == 0; }
  31
  32 void
  33 test1()
  34 {
  35   int array[1];
  36   Container con(array, array);
  37   VERIFY(std::remove_if(con.begin(), con.end(), equal1).ptr == array);
  38 }
  39
  40 void
  41 test2()
  42 {
  43   int array[] = {1};
  44   Container con(array, array + 1);
  45   VERIFY(std::remove_if(con.begin(), con.end(), equal0).ptr == array + 1);
  46   VERIFY(std::remove_if(con.begin(), con.end(), equal1).ptr == array);
  47 }
  48
  49 void
  50 test3()
  51 {
  52   int array[] = {0, 1, 0, 1, 0, 0, 1, 1};
  53   Container con(array, array + 8);
  54   VERIFY(std::remove_if(con.begin(), con.end(), equal1).ptr == array + 4);
  55   VERIFY(array[0] == 0 && array[1] == 0 && array[2] == 0 &&
  56          array[3] == 0);
  57 }
  58
  59 int
  60 main()
  61 {
  62   test1();
  63   test2();
  64   test3();
  65 }