Mercurial > octave
annotate src/pt-assign.h @ 11586:12df7854fa7c
strip trailing whitespace from source files
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 20 Jan 2011 17:24:59 -0500 |
| parents | cda4aa780d58 |
| children | 72c96de7a403 |
| rev | line source |
|---|---|
| 2980 | 1 /* |
| 2 | |
| 11523 | 3 Copyright (C) 1996-2011 John W. Eaton |
| 2980 | 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 | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 2980 | 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 | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 2980 | 20 |
| 21 */ | |
| 22 | |
| 23 #if !defined (octave_tree_assign_h) | |
| 24 #define octave_tree_assign_h 1 | |
| 25 | |
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26 #include <iosfwd> |
| 2980 | 27 #include <string> |
| 28 | |
| 29 class tree_argument_list; | |
| 30 class tree_walker; | |
| 31 | |
| 32 class octave_value; | |
| 33 class octave_value_list; | |
| 34 class octave_lvalue; | |
| 35 | |
| 36 #include "ov.h" | |
| 37 #include "pt-exp.h" | |
| 7336 | 38 #include "symtab.h" |
| 2980 | 39 |
| 40 // Simple assignment expressions. | |
| 41 | |
| 42 class | |
| 43 tree_simple_assignment : public tree_expression | |
| 44 { | |
| 45 public: | |
| 46 | |
| 47 tree_simple_assignment (bool plhs = false, int l = -1, int c = -1, | |
| 10313 | 48 octave_value::assign_op t = octave_value::op_asn_eq) |
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49 : tree_expression (l, c), lhs (0), rhs (0), preserve (plhs), ans_ass (), |
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50 etype (t), first_execution (true) { } |
| 2980 | 51 |
| 52 tree_simple_assignment (tree_expression *le, tree_expression *re, | |
| 10313 | 53 bool plhs = false, int l = -1, int c = -1, |
| 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 |
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62 octave_value rvalue1 (int nargout = 1); |
| 2980 | 63 |
| 64 octave_value_list rvalue (int nargout); | |
| 65 | |
| 3933 | 66 bool is_assignment_expression (void) const { return true; } |
| 2980 | 67 |
| 3523 | 68 std::string oper (void) const; |
| 2980 | 69 |
| 70 tree_expression *left_hand_side (void) { return lhs; } | |
| 71 | |
| 72 tree_expression *right_hand_side (void) { return rhs; } | |
| 73 | |
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74 tree_expression *dup (symbol_table::scope_id scope, |
| 10313 | 75 symbol_table::context_id context) const; |
| 5861 | 76 |
| 2980 | 77 void accept (tree_walker& tw); |
| 78 | |
| 7087 | 79 octave_value::assign_op op_type (void) const { return etype; } |
| 80 | |
| 2980 | 81 private: |
| 82 | |
| 83 void do_assign (octave_lvalue& ult, const octave_value_list& args, | |
| 10313 | 84 const octave_value& rhs_val); |
| 2980 | 85 |
| 86 void do_assign (octave_lvalue& ult, const octave_value& rhs_val); | |
| 87 | |
| 88 // The left hand side of the assignment. | |
| 89 tree_expression *lhs; | |
| 90 | |
| 91 // The right hand side of the assignment. | |
| 92 tree_expression *rhs; | |
| 93 | |
| 94 // True if we should not delete the lhs. | |
| 95 bool preserve; | |
| 96 | |
| 5794 | 97 // True if this is an assignment to the automatic variable ans. |
| 2980 | 98 bool ans_ass; |
| 99 | |
| 100 // The type of the expression. | |
| 101 octave_value::assign_op etype; | |
| 2988 | 102 |
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103 // true only on first rvalue() call. |
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104 bool first_execution; |
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105 |
| 2988 | 106 // No copying! |
| 107 | |
| 2989 | 108 tree_simple_assignment (const tree_simple_assignment&); |
| 2988 | 109 |
| 2989 | 110 tree_simple_assignment& operator = (const tree_simple_assignment&); |
| 2980 | 111 }; |
| 112 | |
| 113 // Multi-valued assignment expressions. | |
| 114 | |
| 115 class | |
| 116 tree_multi_assignment : public tree_expression | |
| 117 { | |
| 118 public: | |
| 119 | |
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120 tree_multi_assignment (bool plhs = false, int l = -1, int c = -1) |
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121 : tree_expression (l, c), lhs (0), rhs (0), preserve (plhs), |
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122 first_execution (true) { } |
| 2980 | 123 |
| 124 tree_multi_assignment (tree_argument_list *lst, tree_expression *r, | |
| 10313 | 125 bool plhs = false, int l = -1, int c = -1); |
| 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 |
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parents:
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135 octave_value rvalue1 (int nargout = 1); |
| 2980 | 136 |
| 137 octave_value_list rvalue (int nargout); | |
| 138 | |
| 3523 | 139 std::string oper (void) const; |
| 3208 | 140 |
| 2980 | 141 tree_argument_list *left_hand_side (void) { return lhs; } |
| 142 | |
| 143 tree_expression *right_hand_side (void) { return rhs; } | |
| 144 | |
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scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
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changeset
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145 tree_expression *dup (symbol_table::scope_id scope, |
| 10313 | 146 symbol_table::context_id context) const; |
| 5861 | 147 |
| 2980 | 148 void accept (tree_walker& tw); |
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John W. Eaton <jwe@octave.org>
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149 |
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Jaroslav Hajek <highegg@gmail.com>
parents:
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150 octave_value::assign_op op_type (void) const { return octave_value::op_asn_eq; } |
| 2980 | 151 |
| 152 private: | |
| 153 | |
| 3208 | 154 // The left hand side of the assignment. |
| 2980 | 155 tree_argument_list *lhs; |
| 3208 | 156 |
| 157 // The right hand side of the assignment. | |
| 2980 | 158 tree_expression *rhs; |
| 2988 | 159 |
| 3208 | 160 // True if we should not delete the lhs. |
| 161 bool preserve; | |
| 162 | |
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8037
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check for obsolete built-in variable assignment at first execution rather than parse time
Jaroslav Hajek <highegg@gmail.com>
parents:
8011
diff
changeset
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163 // true only on first rvalue() call. |
|
0be8cf23b95c
check for obsolete built-in variable assignment at first execution rather than parse time
Jaroslav Hajek <highegg@gmail.com>
parents:
8011
diff
changeset
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164 bool first_execution; |
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0be8cf23b95c
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Jaroslav Hajek <highegg@gmail.com>
parents:
8011
diff
changeset
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165 |
| 2988 | 166 // No copying! |
| 167 | |
| 2989 | 168 tree_multi_assignment (const tree_multi_assignment&); |
| 2988 | 169 |
| 2989 | 170 tree_multi_assignment& operator = (const tree_multi_assignment&); |
| 2980 | 171 }; |
| 172 | |
| 173 #endif |