server/supernova/utilities/exists.hpp

   1 //  templated exists
   2 //  Copyright (C) 2008 Tim Blechmann
   3 //
   4 //  This program is free software; you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation; either version 2 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program 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
  15 //  along with this program; see the file COPYING.  If not, write to
  16 //  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 //  Boston, MA 02111-1307, USA.
  18
  19 #ifndef EXISTS_HPP
  20 #define EXISTS_HPP
  21
  22 namespace nova
  23 {
  24
  25 template<typename container>
  26 bool exists (container const & c, typename container::key_type const & k)
  27 {
  28     return c.find(k) != c.end();
  29 }
  30
  31 } /* namespace nova */
  32
  33 #endif /* EXISTS_HPP */