MathTypeLibrary(libmath++)  0.0.3
visitor.h
1 // Math Type Library
3 // $Id: visitor.h,v 1.4 2002/04/29 19:34:30 cparpart Exp $
4 // (This file contains the abstract interface to the expression tree visitor)
5 //
6 // Copyright (c) 2002 by Christian Parpart <cparpart@surakware.net>
7 //
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
12 //
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
17 //
18 // You should have received a copy of the GNU Library General Public License
19 // along with this library; see the file COPYING.LIB. If not, write to
20 // the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 // Boston, MA 02111-1307, USA.
23 #ifndef libmath_visitor_h
24 #define libmath_visitor_h
25 
26 namespace math {
27 
28 template<class> class TNumberNode; // numbers
29 template<class> class TSymbolNode; // symbols ("e", "pi", "t", ...")
30 template<class> class TParamNode; // usually the symbol "x"
31 
32 template<class> class TPlusNode; // operations 1st degree
33 template<class> class TNegNode;
34 
35 template<class> class TMulNode; // operations 2nd degree
36 template<class> class TDivNode;
37 
38 template<class> class TPowNode; // operations 3rd degree
39 
40 template<class> class TSqrtNode; // build-in functions
41 template<class> class TSinNode;
42 template<class> class TCosNode;
43 template<class> class TTanNode;
44 template<class> class TCoTanNode;
45 template<class> class TLnNode;
46 
47 template<class> class TFuncNode; // user defined functions
48 
49 template<class> class TIfNode; // extended functions
50 
51 template<class> class TEquNode; // equations
52 template<class> class TUnEquNode;
53 template<class> class TGreaterNode;
54 template<class> class TLessNode;
55 template<class> class TGreaterEquNode;
56 template<class> class TLessEquNode;
57 
63 template<typename T>
64 class TNodeVisitor {
65 public:
66  virtual ~TNodeVisitor() {};
67 
68  virtual void visit(TNumberNode<T> *) = 0;
69  virtual void visit(TSymbolNode<T> *) = 0;
70  virtual void visit(TParamNode<T> *) = 0;
71 
72  virtual void visit(TPlusNode<T> *) = 0;
73  virtual void visit(TNegNode<T> *) = 0;
74 
75  virtual void visit(TMulNode<T> *) = 0;
76  virtual void visit(TDivNode<T> *) = 0;
77 
78  virtual void visit(TPowNode<T> *) = 0;
79  virtual void visit(TSqrtNode<T> *) = 0;
80 
81  virtual void visit(TSinNode<T> *) = 0;
82  virtual void visit(TCosNode<T> *) = 0;
83  virtual void visit(TTanNode<T> *) = 0;
84  virtual void visit(TLnNode<T> *) = 0;
85 
86  virtual void visit(TFuncNode<T> *) = 0;
87  virtual void visit(TIfNode<T> *) = 0;
88 
89  virtual void visit(TEquNode<T> *) = 0;
90  virtual void visit(TUnEquNode<T> *) = 0;
91  virtual void visit(TGreaterNode<T> *) = 0;
92  virtual void visit(TLessNode<T> *) = 0;
93  virtual void visit(TGreaterEquNode<T> *) = 0;
94  virtual void visit(TLessEquNode<T> *) = 0;
95 };
96 
97 } // namespace math
98 
99 #endif