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

   1 // Copyright (C) 2005-2024 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 // 25.3.3.4 [lib.binary.search]
  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 using std::binary_search;
  27
  28 typedef test_container<int, forward_iterator_wrapper> Container;
  29
  30 void
  31 test1()
  32 {
  33   int array[] = {0};
  34   Container con(array, array);
  35   VERIFY(!binary_search(con.begin(), con.end(), 1));
  36 }
  37
  38 void
  39 test2()
  40 {
  41   int array[] = {0, 2, 4, 6, 8};
  42   Container con(array, array + 5);
  43   for(int i = 0; i < 10; i += 2)
  44     VERIFY(binary_search(con.begin(), con.end(), i));
  45   for(int i = -1; i < 11; i += 2)
  46     VERIFY(!binary_search(con.begin(), con.end(), i));
  47 }
  48
  49 int main()
  50 {
  51   test1();
  52   test2();
  53 }