Drizzled Public API Documentation

comp_creator.h

00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008 Sun Microsystems, Inc.
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00020 #pragma once
00021 
00022 namespace drizzled
00023 {
00024 
00025 class Item;
00026 class Item_bool_func2;
00027 
00028 class Comp_creator
00029 {
00030 public:
00031   Comp_creator() {}                           /* Remove gcc warning */
00032   virtual ~Comp_creator() {}                  /* Remove gcc warning */
00033   virtual Item_bool_func2* create(Item *a, Item *b) const = 0;
00034   virtual const char* symbol(bool invert) const = 0;
00035   virtual bool eqne_op() const = 0;
00036   virtual bool l_op() const = 0;
00037 };
00038 
00039 typedef Comp_creator* (*chooser_compare_func_creator)(bool invert);
00040 
00041 Comp_creator *comp_eq_creator(bool invert);
00042 Comp_creator *comp_ge_creator(bool invert);
00043 Comp_creator *comp_gt_creator(bool invert);
00044 Comp_creator *comp_le_creator(bool invert);
00045 Comp_creator *comp_lt_creator(bool invert);
00046 Comp_creator *comp_ne_creator(bool invert);
00047 
00048 } /* namespace drizzled */
00049