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

   1 // Copyright (C) 2005-2014 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 // 25.3.4 [lib.alg.merge]
  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::bidirectional_iterator_wrapper;
  26 using std::inplace_merge;
  27
  28 typedef test_container<int, bidirectional_iterator_wrapper> container;
  29
  30 void
  31 test1()
  32 {
  33   int array[] = { 1 };
  34   container con1(array, array);
  35   inplace_merge(con1.begin(), con1.end(), con1.end());
  36   container con2(array, array + 1);
  37   inplace_merge(con2.begin(), con2.end(), con2.end());
  38   inplace_merge(con2.begin(), con2.begin(), con2.end());
  39 }
  40
  41 void
  42 test2()
  43 {
  44   bool test __attribute__((unused)) = true;
  45
  46   int array[] = { 0, 2, 4, 1, 3, 5 };
  47   container con(array, array + 6);
  48   inplace_merge(con.begin(), con.it(3), con.end());
  49   VERIFY( array[0] == 0 && array[1] == 1 && array[2] == 2
  50           && array[3] == 3 && array[4] == 4 && array[5] == 5 );
  51 }
  52
  53 struct S
  54 {
  55   int a;
  56   int b;
  57   S(int _a, int _b) : a(_a), b(_b) { }
  58   S() { }
  59   bool
  60   operator<(const S& _s) const
  61   { return a < _s.a; }
  62 };
  63
  64 void
  65 test3()
  66 {
  67   bool test __attribute__((unused)) = true;
  68
  69   S s[4];
  70   s[0].a = 0;
  71   s[1].a = 1;
  72   s[2].a = 0;
  73   s[3].a = 1;
  74   s[0].b = 0;
  75   s[1].b = 0;
  76   s[2].b = 1;
  77   s[3].b = 1;
  78   inplace_merge(s, s + 2, s + 4);
  79   VERIFY( s[0].b == 0 && s[1].b == 1 && s[2].b == 0 && s[3].b == 1 );
  80 }
  81
  82 int
  83 main()
  84 {
  85   test1();
  86   test2();
  87   test3();
  88   return 0;
  89 }