libstdc++-v3/testsuite/ext/pb_ds/example/basic_set.cc

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 3, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  22
  23 // Permission to use, copy, modify, sell, and distribute this software
  24 // is hereby granted without fee, provided that the above copyright
  25 // notice appears in all copies, and that both that copyright notice
  26 // and this permission notice appear in supporting documentation. None
  27 // of the above authors, nor IBM Haifa Research Laboratories, make any
  28 // representation about the suitability of this software for any
  29 // purpose. It is provided "as is" without express or implied
  30 // warranty.
  31
  32 /**
  33  * @file basic_set_example.cpp
  34  * A basic example showing how to use sets.
  35  */
  36
  37 /**
  38  * This example shows how to use "sets". It defines a
  39  * function performing a sequence of operations on
  40  * a generic container. It then calls this function with some containers.
  41  */
  42
  43 #include <iostream>
  44 #include <cassert>
  45 #include <ext/pb_ds/assoc_container.hpp>
  46 #include <ext/pb_ds/tag_and_trait.hpp>
  47
  48 using namespace std;
  49 using namespace __gnu_pbds;
  50
  51 // The following function performs a sequence of operations on an
  52 // associative container object storing integers.
  53 template<class Cntnr>
  54 void
  55 some_op_sequence(Cntnr& r_c)
  56 {
  57   assert(r_c.empty());
  58   assert(r_c.size() == 0);
  59
  60   r_c.insert(1);
  61   r_c.insert(2);
  62
  63   assert(!r_c.empty());
  64   assert(r_c.size() == 2);
  65
  66   cout << "All value types in the container:" << endl;
  67   for (typename Cntnr::const_iterator it = r_c.begin(); it != r_c.end();
  68        ++it)
  69     cout <<* it << " ";
  70
  71   cout << endl;
  72
  73   r_c.clear();
  74
  75   assert(r_c.empty());
  76   assert(r_c.size() == 0);
  77 }
  78
  79 int main()
  80 {
  81   {
  82     // Perform operations on a collision-chaining hash set.
  83     cc_hash_table<int, null_type> c;
  84     some_op_sequence(c);
  85   }
  86
  87   {
  88     // Perform operations on a general-probing hash set.
  89     gp_hash_table<int, null_type> c;
  90     some_op_sequence(c);
  91   }
  92
  93   {
  94     // Perform operations on a red-black tree set.
  95     tree<int, null_type> c;
  96     some_op_sequence(c);
  97   }
  98
  99   {
 100     // Perform operations on a splay tree set.
 101     tree<
 102       int,
 103       null_type,
 104       less<int>,
 105       splay_tree_tag> c;
 106     some_op_sequence(c);
 107   }
 108
 109   {
 110     // Perform operations on a splay tree set.
 111     tree<
 112       int,
 113       null_type,
 114       less<int>,
 115       ov_tree_tag> c;
 116     some_op_sequence(c);
 117   }
 118
 119   {
 120     // Perform operations on a list-update set.
 121     list_update<int, null_type> c;
 122     some_op_sequence(c);
 123   }
 124
 125   return 0;
 126 }