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

   1 // Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // 25.3.1.3 [lib.partial.sort]
  20
  21 #include <algorithm>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_iterators.h>
  24
  25 using __gnu_test::test_container;
  26 using __gnu_test::random_access_iterator_wrapper;
  27 using std::partial_sort;
  28
  29 typedef test_container<int, random_access_iterator_wrapper> Container;
  30
  31 void
  32 test1()
  33 {
  34   int array[]={2,1,0};
  35   Container con1(array, array + 2);
  36   Container con2(array, array);
  37   partial_sort(con2.begin(), con2.begin(), con2.end());
  38   partial_sort(con1.begin(), con1.begin(), con1.end());
  39   partial_sort(con1.begin(), con1.end(), con1.end());
  40 }
  41
  42 void
  43 test2()
  44 {
  45   int array[] = {6, 5, 4, 3, 2, 1, 0};
  46   Container con(array, array + 7);
  47   partial_sort(con.begin(), con.it(3), con.end());
  48   VERIFY(array[0] == 0 && array[1] == 1 && array[2] == 2);
  49 }
  50
  51 void
  52 test3()
  53 {
  54   int array[] = {0, 6, 1, 5, 2, 4, 3};
  55   Container con(array,array + 7);
  56   partial_sort(con.begin(), con.it(3), con.end());
  57   VERIFY(array[0] == 0 && array[1] == 1 && array[2] == 2);
  58 }
  59
  60 int
  61 main()
  62 {
  63   test1();
  64   test2();
  65   test3();
  66 }