Mercurial > octave-nkf
annotate src/pt-assign.h @ 7961:a5d1e27ee1f4 ss-3-1-51
3.1.51 snapshot
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 22 Jul 2008 11:40:48 -0400 |
| parents | 71f068b22fcc |
| children | 3100283874d7 |
| rev | line source |
|---|---|
| 2980 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2006, |
| 4 2007 John W. Eaton | |
| 2980 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2980 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2980 | 21 |
| 22 */ | |
| 23 | |
| 24 #if !defined (octave_tree_assign_h) | |
| 25 #define octave_tree_assign_h 1 | |
| 26 | |
| 3503 | 27 #include <iostream> |
| 2980 | 28 #include <string> |
| 29 | |
| 30 class tree_argument_list; | |
| 31 class tree_walker; | |
| 32 | |
| 33 class octave_value; | |
| 34 class octave_value_list; | |
| 35 class octave_lvalue; | |
| 36 | |
| 37 #include "ov.h" | |
| 38 #include "pt-exp.h" | |
| 7336 | 39 #include "symtab.h" |
| 2980 | 40 |
| 41 // Simple assignment expressions. | |
| 42 | |
| 43 class | |
| 44 tree_simple_assignment : public tree_expression | |
| 45 { | |
| 46 public: | |
| 47 | |
| 48 tree_simple_assignment (bool plhs = false, int l = -1, int c = -1, | |
| 3527 | 49 octave_value::assign_op t = octave_value::op_asn_eq) |
| 2980 | 50 : tree_expression (l, c), lhs (0), rhs (0), preserve (plhs), etype (t) { } |
| 51 | |
| 52 tree_simple_assignment (tree_expression *le, tree_expression *re, | |
| 53 bool plhs = false, int l = -1, int c = -1, | |
| 6253 | 54 octave_value::assign_op t = octave_value::op_asn_eq); |
| 2980 | 55 |
| 56 ~tree_simple_assignment (void); | |
| 57 | |
| 4267 | 58 bool has_magic_end (void) const { return (rhs && rhs->has_magic_end ()); } |
| 59 | |
| 3933 | 60 bool rvalue_ok (void) const { return true; } |
| 2980 | 61 |
| 62 octave_value rvalue (void); | |
| 63 | |
| 64 octave_value_list rvalue (int nargout); | |
| 65 | |
| 3933 | 66 bool is_assignment_expression (void) const { return true; } |
| 2980 | 67 |
| 68 void eval_error (void); | |
| 69 | |
| 3523 | 70 std::string oper (void) const; |
| 2980 | 71 |
| 72 tree_expression *left_hand_side (void) { return lhs; } | |
| 73 | |
| 74 tree_expression *right_hand_side (void) { return rhs; } | |
| 75 | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
76 tree_expression *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
77 symbol_table::context_id context); |
| 5861 | 78 |
| 2980 | 79 void accept (tree_walker& tw); |
| 80 | |
| 7087 | 81 octave_value::assign_op op_type (void) const { return etype; } |
| 82 | |
| 2980 | 83 private: |
| 84 | |
| 85 void do_assign (octave_lvalue& ult, const octave_value_list& args, | |
| 86 const octave_value& rhs_val); | |
| 87 | |
| 88 void do_assign (octave_lvalue& ult, const octave_value& rhs_val); | |
| 89 | |
| 90 // The left hand side of the assignment. | |
| 91 tree_expression *lhs; | |
| 92 | |
| 93 // The right hand side of the assignment. | |
| 94 tree_expression *rhs; | |
| 95 | |
| 96 // True if we should not delete the lhs. | |
| 97 bool preserve; | |
| 98 | |
| 5794 | 99 // True if this is an assignment to the automatic variable ans. |
| 2980 | 100 bool ans_ass; |
| 101 | |
| 102 // The type of the expression. | |
| 103 octave_value::assign_op etype; | |
| 2988 | 104 |
| 105 // No copying! | |
| 106 | |
| 2989 | 107 tree_simple_assignment (const tree_simple_assignment&); |
| 2988 | 108 |
| 2989 | 109 tree_simple_assignment& operator = (const tree_simple_assignment&); |
| 2980 | 110 }; |
| 111 | |
| 112 // Multi-valued assignment expressions. | |
| 113 | |
| 114 class | |
| 115 tree_multi_assignment : public tree_expression | |
| 116 { | |
| 117 public: | |
| 118 | |
| 3208 | 119 tree_multi_assignment (bool plhs = false, int l = -1, int c = -1, |
| 3527 | 120 octave_value::assign_op t = octave_value::op_asn_eq) |
| 3208 | 121 : tree_expression (l, c), lhs (0), rhs (0), preserve (plhs), etype(t) { } |
| 2980 | 122 |
| 123 tree_multi_assignment (tree_argument_list *lst, tree_expression *r, | |
| 3208 | 124 bool plhs = false, int l = -1, int c = -1, |
| 6253 | 125 octave_value::assign_op t = octave_value::op_asn_eq); |
| 2980 | 126 |
| 127 ~tree_multi_assignment (void); | |
| 128 | |
| 4267 | 129 bool has_magic_end (void) const { return (rhs && rhs->has_magic_end ()); } |
| 130 | |
| 3933 | 131 bool is_assignment_expression (void) const { return true; } |
| 2980 | 132 |
| 3933 | 133 bool rvalue_ok (void) const { return true; } |
| 2980 | 134 |
| 135 octave_value rvalue (void); | |
| 136 | |
| 137 octave_value_list rvalue (int nargout); | |
| 138 | |
| 139 void eval_error (void); | |
| 140 | |
| 3523 | 141 std::string oper (void) const; |
| 3208 | 142 |
| 2980 | 143 tree_argument_list *left_hand_side (void) { return lhs; } |
| 144 | |
| 145 tree_expression *right_hand_side (void) { return rhs; } | |
| 146 | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
147 tree_expression *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
148 symbol_table::context_id context); |
| 5861 | 149 |
| 2980 | 150 void accept (tree_walker& tw); |
| 7087 | 151 |
| 152 octave_value::assign_op op_type (void) const { return etype; } | |
| 2980 | 153 |
| 154 private: | |
| 155 | |
| 3208 | 156 // The left hand side of the assignment. |
| 2980 | 157 tree_argument_list *lhs; |
| 3208 | 158 |
| 159 // The right hand side of the assignment. | |
| 2980 | 160 tree_expression *rhs; |
| 2988 | 161 |
| 3208 | 162 // True if we should not delete the lhs. |
| 163 bool preserve; | |
| 164 | |
| 165 // The type of the expression. | |
| 166 octave_value::assign_op etype; | |
| 167 | |
| 2988 | 168 // No copying! |
| 169 | |
| 2989 | 170 tree_multi_assignment (const tree_multi_assignment&); |
| 2988 | 171 |
| 2989 | 172 tree_multi_assignment& operator = (const tree_multi_assignment&); |
| 2980 | 173 }; |
| 174 | |
| 175 #endif | |
| 176 | |
| 177 /* | |
| 178 ;;; Local Variables: *** | |
| 179 ;;; mode: C++ *** | |
| 180 ;;; End: *** | |
| 181 */ |