Mercurial > octave-nkf
annotate src/pt-stmt.h @ 12312:b10ea6efdc58 release-3-4-x ss-3-3-91
version is now 3.3.91
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 31 Jan 2011 08:36:58 -0500 |
| parents | fd0a3ac60b0e |
| children | 72c96de7a403 |
| rev | line source |
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| 2982 | 1 /* |
| 2 | |
| 11523 | 3 Copyright (C) 1996-2011 John W. Eaton |
| 2982 | 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. | |
| 2982 | 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/>. | |
| 2982 | 20 |
| 21 */ | |
| 22 | |
| 23 #if !defined (octave_tree_stmt_h) | |
| 24 #define octave_tree_stmt_h 1 | |
| 25 | |
| 26 class octave_value_list; | |
| 27 | |
| 28 class tree_command; | |
| 29 class tree_expression; | |
| 30 | |
| 31 class tree_walker; | |
| 32 | |
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33 #include <deque> |
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34 |
| 4219 | 35 #include "base-list.h" |
| 3665 | 36 #include "comment-list.h" |
| 7336 | 37 #include "symtab.h" |
| 3665 | 38 |
| 2982 | 39 // A statement is either a command to execute or an expression to |
| 40 // evaluate. | |
| 41 | |
| 42 class | |
| 43 tree_statement | |
| 44 { | |
| 45 public: | |
| 46 | |
| 47 tree_statement (void) | |
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48 : cmd (0), expr (0), comm (0) { } |
| 2982 | 49 |
| 3665 | 50 tree_statement (tree_command *c, octave_comment_list *cl) |
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51 : cmd (c), expr (0), comm (cl) { } |
| 2982 | 52 |
| 3665 | 53 tree_statement (tree_expression *e, octave_comment_list *cl) |
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54 : cmd (0), expr (e), comm (cl) { } |
| 2982 | 55 |
| 56 ~tree_statement (void); | |
| 57 | |
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58 void set_print_flag (bool print_flag); |
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59 |
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60 bool print_result (void); |
| 2982 | 61 |
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62 bool is_command (void) const { return cmd != 0; } |
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63 |
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64 bool is_expression (void) const { return expr != 0; } |
| 2982 | 65 |
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66 void set_breakpoint (void); |
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67 |
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68 void delete_breakpoint (void); |
| 2982 | 69 |
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70 bool is_breakpoint (void) const; |
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71 |
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72 int line (void) const; |
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73 int column (void) const; |
| 2982 | 74 |
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75 void echo_code (void); |
| 2982 | 76 |
| 77 tree_command *command (void) { return cmd; } | |
| 78 | |
| 79 tree_expression *expression (void) { return expr; } | |
| 80 | |
| 3665 | 81 octave_comment_list *comment_text (void) { return comm; } |
| 82 | |
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83 bool is_null_statement (void) const { return ! (cmd || expr || comm); } |
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84 |
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85 bool is_end_of_fcn_or_script (void) const; |
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86 |
| 4935 | 87 // Allow modification of this statement. Note that there is no |
| 88 // checking. If you use these, are you sure you knwo what you are | |
| 89 // doing? | |
| 90 | |
| 91 void set_command (tree_command *c) { cmd = c; } | |
| 92 | |
| 93 void set_expression (tree_expression *e) { expr = e; } | |
| 94 | |
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95 tree_statement *dup (symbol_table::scope_id scope, |
| 10313 | 96 symbol_table::context_id context) const; |
| 5861 | 97 |
| 2982 | 98 void accept (tree_walker& tw); |
| 99 | |
| 100 private: | |
| 101 | |
| 102 // Only one of cmd or expr can be valid at once. | |
| 103 | |
| 104 // Command to execute. | |
| 105 tree_command *cmd; | |
| 106 | |
| 107 // Expression to evaluate. | |
| 108 tree_expression *expr; | |
| 109 | |
| 3665 | 110 // Comment associated with this statement. |
| 111 octave_comment_list *comm; | |
| 112 | |
| 2988 | 113 // No copying! |
| 114 tree_statement (const tree_statement&); | |
| 115 | |
| 116 tree_statement& operator = (const tree_statement&); | |
| 2982 | 117 }; |
| 118 | |
| 119 // A list of statements to evaluate. | |
| 120 | |
| 121 class | |
| 4219 | 122 tree_statement_list : public octave_base_list<tree_statement *> |
| 2982 | 123 { |
| 124 public: | |
| 125 | |
| 126 tree_statement_list (void) | |
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127 : function_body (false), anon_function_body (false), |
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128 script_body (false) { } |
| 2982 | 129 |
| 130 tree_statement_list (tree_statement *s) | |
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131 : function_body (false), anon_function_body (false), |
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132 script_body (false) { append (s); } |
| 2982 | 133 |
| 134 ~tree_statement_list (void) | |
| 135 { | |
| 4219 | 136 while (! empty ()) |
| 10313 | 137 { |
| 138 iterator p = begin (); | |
| 139 delete *p; | |
| 140 erase (p); | |
| 141 } | |
| 2982 | 142 } |
| 143 | |
| 144 void mark_as_function_body (void) { function_body = true; } | |
| 145 | |
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146 void mark_as_anon_function_body (void) { anon_function_body = true; } |
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147 |
| 7736 | 148 void mark_as_script_body (void) { script_body = true; } |
| 149 | |
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150 bool is_function_body (void) const { return function_body; } |
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151 |
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152 bool is_anon_function_body (void) const { return anon_function_body; } |
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153 |
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154 bool is_script_body (void) const { return script_body; } |
| 2982 | 155 |
| 3770 | 156 int set_breakpoint (int line); |
| 157 | |
| 158 void delete_breakpoint (int line); | |
| 159 | |
| 160 octave_value_list list_breakpoints (void); | |
| 161 | |
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162 tree_statement_list *dup (symbol_table::scope_id scope, |
| 10313 | 163 symbol_table::context_id context) const; |
| 5861 | 164 |
| 2982 | 165 void accept (tree_walker& tw); |
| 166 | |
| 167 private: | |
| 168 | |
| 169 // Does this list of statements make up the body of a function? | |
| 170 bool function_body; | |
| 2988 | 171 |
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172 // Does this list of statements make up the body of a function? |
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173 bool anon_function_body; |
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174 |
| 7736 | 175 // Does this list of statements make up the body of a script? |
| 176 bool script_body; | |
| 177 | |
| 2988 | 178 // No copying! |
| 179 | |
| 180 tree_statement_list (const tree_statement_list&); | |
| 181 | |
| 182 tree_statement_list& operator = (const tree_statement_list&); | |
| 2982 | 183 }; |
| 184 | |
| 185 #endif |