|
2980
|
1 /* |
|
|
2 |
|
|
3 Copyright (C) 1996, 1997 John W. Eaton |
|
|
4 |
|
|
5 This file is part of Octave. |
|
|
6 |
|
|
7 Octave is free software; you can redistribute it and/or modify it |
|
|
8 under the terms of the GNU General Public License as published by the |
|
|
9 Free Software Foundation; either version 2, or (at your option) any |
|
|
10 later version. |
|
|
11 |
|
|
12 Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
15 for more details. |
|
|
16 |
|
|
17 You should have received a copy of the GNU General Public License |
|
|
18 along with Octave; see the file COPYING. If not, write to the Free |
|
5307
|
19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
|
|
20 02110-1301, USA. |
|
2980
|
21 |
|
|
22 */ |
|
|
23 |
|
|
24 #if !defined (octave_tree_binop_h) |
|
|
25 #define octave_tree_binop_h 1 |
|
|
26 |
|
|
27 #include <string> |
|
|
28 |
|
|
29 class tree_walker; |
|
|
30 |
|
|
31 class octave_value; |
|
|
32 class octave_value_list; |
|
|
33 class octave_lvalue; |
|
|
34 |
|
|
35 #include "ov.h" |
|
|
36 #include "pt-exp.h" |
|
|
37 |
|
|
38 // Binary expressions. |
|
|
39 |
|
|
40 class |
|
|
41 tree_binary_expression : public tree_expression |
|
|
42 { |
|
|
43 public: |
|
|
44 |
|
|
45 tree_binary_expression (int l = -1, int c = -1, |
|
|
46 octave_value::binary_op t |
|
|
47 = octave_value::unknown_binary_op) |
|
|
48 : tree_expression (l, c), op_lhs (0), op_rhs (0), etype (t) { } |
|
|
49 |
|
|
50 tree_binary_expression (tree_expression *a, tree_expression *b, |
|
|
51 int l = -1, int c = -1, |
|
|
52 octave_value::binary_op t |
|
|
53 = octave_value::unknown_binary_op) |
|
|
54 : tree_expression (l, c), op_lhs (a), op_rhs (b), etype (t) { } |
|
|
55 |
|
|
56 ~tree_binary_expression (void) |
|
|
57 { |
|
|
58 delete op_lhs; |
|
|
59 delete op_rhs; |
|
|
60 } |
|
|
61 |
|
4267
|
62 bool has_magic_end (void) const |
|
|
63 { |
|
|
64 return ((op_lhs && op_lhs->has_magic_end ()) |
|
|
65 || (op_rhs && op_rhs->has_magic_end ())); |
|
|
66 } |
|
|
67 |
|
4023
|
68 bool is_binary_expression (void) const { return true; } |
|
|
69 |
|
3933
|
70 bool rvalue_ok (void) const { return true; } |
|
2980
|
71 |
|
|
72 octave_value rvalue (void); |
|
|
73 |
|
3010
|
74 octave_value_list rvalue (int nargout); |
|
2980
|
75 |
|
|
76 void eval_error (void); |
|
|
77 |
|
3523
|
78 std::string oper (void) const; |
|
2980
|
79 |
|
4023
|
80 octave_value::binary_op op_type (void) const { return etype; } |
|
|
81 |
|
2980
|
82 tree_expression *lhs (void) { return op_lhs; } |
|
|
83 tree_expression *rhs (void) { return op_rhs; } |
|
|
84 |
|
|
85 void accept (tree_walker& tw); |
|
|
86 |
|
|
87 protected: |
|
|
88 |
|
|
89 // The operands for the expression. |
|
|
90 tree_expression *op_lhs; |
|
|
91 tree_expression *op_rhs; |
|
|
92 |
|
|
93 private: |
|
|
94 |
|
|
95 // The type of the expression. |
|
|
96 octave_value::binary_op etype; |
|
2988
|
97 |
|
|
98 // No copying! |
|
|
99 |
|
|
100 tree_binary_expression (const tree_binary_expression&); |
|
|
101 |
|
|
102 tree_binary_expression& operator = (const tree_binary_expression&); |
|
2980
|
103 }; |
|
|
104 |
|
|
105 // Boolean expressions. |
|
|
106 |
|
|
107 class |
|
|
108 tree_boolean_expression : public tree_binary_expression |
|
|
109 { |
|
|
110 public: |
|
|
111 |
|
|
112 enum type |
|
|
113 { |
|
|
114 unknown, |
|
|
115 bool_and, |
|
|
116 bool_or |
|
|
117 }; |
|
|
118 |
|
|
119 tree_boolean_expression (int l = -1, int c = -1, type t = unknown) |
|
|
120 : tree_binary_expression (l, c), etype (t) { } |
|
|
121 |
|
|
122 tree_boolean_expression (tree_expression *a, tree_expression *b, |
|
|
123 int l = -1, int c = -1, type t = unknown) |
|
|
124 : tree_binary_expression (a, b, l, c), etype (t) { } |
|
|
125 |
|
|
126 ~tree_boolean_expression (void) { } |
|
|
127 |
|
4023
|
128 bool is_boolean_expression (void) const { return true; } |
|
|
129 |
|
3933
|
130 bool rvalue_ok (void) const { return true; } |
|
2980
|
131 |
|
|
132 octave_value rvalue (void); |
|
|
133 |
|
|
134 octave_value_list rvalue (int nargout); |
|
|
135 |
|
3523
|
136 std::string oper (void) const; |
|
2980
|
137 |
|
4023
|
138 type op_type (void) const { return etype; } |
|
|
139 |
|
2980
|
140 private: |
|
|
141 |
|
|
142 // The type of the expression. |
|
|
143 type etype; |
|
2988
|
144 |
|
|
145 // No copying! |
|
|
146 |
|
|
147 tree_boolean_expression (const tree_boolean_expression&); |
|
|
148 |
|
|
149 tree_boolean_expression& operator = (const tree_boolean_expression&); |
|
2980
|
150 }; |
|
|
151 |
|
|
152 #endif |
|
|
153 |
|
|
154 /* |
|
|
155 ;;; Local Variables: *** |
|
|
156 ;;; mode: C++ *** |
|
|
157 ;;; End: *** |
|
|
158 */ |
