Mercurial > hg > octave-nkf
annotate libinterp/parse-tree/pt-stmt.h @ 16325:fc565603ccbb
also accept "." as possibly beginning a command
* lex.ll ("."): If it looks like a command, parse it like one.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 16 Mar 2013 04:43:30 -0400 |
| parents | 2fc554ffbc28 |
| children | 7ca7e7d5eb91 |
| rev | line source |
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| 2982 | 1 /* |
| 2 | |
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3 Copyright (C) 1996-2012 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" |
| 14899 | 38 #include "pt.h" |
| 3665 | 39 |
| 2982 | 40 // A statement is either a command to execute or an expression to |
| 41 // evaluate. | |
| 42 | |
| 43 class | |
| 14899 | 44 tree_statement : public tree |
| 2982 | 45 { |
| 46 public: | |
| 47 | |
| 48 tree_statement (void) | |
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49 : cmd (0), expr (0), comm (0) { } |
| 2982 | 50 |
| 3665 | 51 tree_statement (tree_command *c, octave_comment_list *cl) |
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52 : cmd (c), expr (0), comm (cl) { } |
| 2982 | 53 |
| 3665 | 54 tree_statement (tree_expression *e, octave_comment_list *cl) |
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55 : cmd (0), expr (e), comm (cl) { } |
| 2982 | 56 |
| 57 ~tree_statement (void); | |
| 58 | |
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59 void set_print_flag (bool print_flag); |
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60 |
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61 bool print_result (void); |
| 2982 | 62 |
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63 bool is_command (void) const { return cmd != 0; } |
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64 |
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65 bool is_expression (void) const { return expr != 0; } |
| 2982 | 66 |
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67 void set_breakpoint (void); |
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68 |
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69 void delete_breakpoint (void); |
| 2982 | 70 |
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71 bool is_breakpoint (void) const; |
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72 |
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73 int line (void) const; |
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74 int column (void) const; |
| 2982 | 75 |
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76 void echo_code (void); |
| 2982 | 77 |
| 78 tree_command *command (void) { return cmd; } | |
| 79 | |
| 80 tree_expression *expression (void) { return expr; } | |
| 81 | |
| 3665 | 82 octave_comment_list *comment_text (void) { return comm; } |
| 83 | |
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84 bool is_null_statement (void) const { return ! (cmd || expr || comm); } |
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85 |
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86 bool is_end_of_fcn_or_script (void) const; |
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87 |
| 4935 | 88 // Allow modification of this statement. Note that there is no |
| 89 // checking. If you use these, are you sure you knwo what you are | |
| 90 // doing? | |
| 91 | |
| 92 void set_command (tree_command *c) { cmd = c; } | |
| 93 | |
| 94 void set_expression (tree_expression *e) { expr = e; } | |
| 95 | |
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96 tree_statement *dup (symbol_table::scope_id scope, |
| 10313 | 97 symbol_table::context_id context) const; |
| 5861 | 98 |
| 2982 | 99 void accept (tree_walker& tw); |
| 100 | |
| 101 private: | |
| 102 | |
| 103 // Only one of cmd or expr can be valid at once. | |
| 104 | |
| 105 // Command to execute. | |
| 106 tree_command *cmd; | |
| 107 | |
| 108 // Expression to evaluate. | |
| 109 tree_expression *expr; | |
| 110 | |
| 3665 | 111 // Comment associated with this statement. |
| 112 octave_comment_list *comm; | |
| 113 | |
| 2988 | 114 // No copying! |
| 115 tree_statement (const tree_statement&); | |
| 116 | |
| 117 tree_statement& operator = (const tree_statement&); | |
| 2982 | 118 }; |
| 119 | |
| 120 // A list of statements to evaluate. | |
| 121 | |
| 122 class | |
| 4219 | 123 tree_statement_list : public octave_base_list<tree_statement *> |
| 2982 | 124 { |
| 125 public: | |
| 126 | |
| 127 tree_statement_list (void) | |
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128 : function_body (false), anon_function_body (false), |
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129 script_body (false) { } |
| 2982 | 130 |
| 131 tree_statement_list (tree_statement *s) | |
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132 : function_body (false), anon_function_body (false), |
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133 script_body (false) { append (s); } |
| 2982 | 134 |
| 135 ~tree_statement_list (void) | |
| 136 { | |
| 4219 | 137 while (! empty ()) |
| 10313 | 138 { |
| 139 iterator p = begin (); | |
| 140 delete *p; | |
| 141 erase (p); | |
| 142 } | |
| 2982 | 143 } |
| 144 | |
| 145 void mark_as_function_body (void) { function_body = true; } | |
| 146 | |
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147 void mark_as_anon_function_body (void) { anon_function_body = true; } |
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148 |
| 7736 | 149 void mark_as_script_body (void) { script_body = true; } |
| 150 | |
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151 bool is_function_body (void) const { return function_body; } |
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152 |
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153 bool is_anon_function_body (void) const { return anon_function_body; } |
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154 |
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155 bool is_script_body (void) const { return script_body; } |
| 2982 | 156 |
| 3770 | 157 int set_breakpoint (int line); |
| 158 | |
| 159 void delete_breakpoint (int line); | |
| 160 | |
| 161 octave_value_list list_breakpoints (void); | |
| 162 | |
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163 tree_statement_list *dup (symbol_table::scope_id scope, |
| 10313 | 164 symbol_table::context_id context) const; |
| 5861 | 165 |
| 2982 | 166 void accept (tree_walker& tw); |
| 167 | |
| 168 private: | |
| 169 | |
| 170 // Does this list of statements make up the body of a function? | |
| 171 bool function_body; | |
| 2988 | 172 |
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173 // Does this list of statements make up the body of a function? |
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174 bool anon_function_body; |
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175 |
| 7736 | 176 // Does this list of statements make up the body of a script? |
| 177 bool script_body; | |
| 178 | |
| 2988 | 179 // No copying! |
| 180 | |
| 181 tree_statement_list (const tree_statement_list&); | |
| 182 | |
| 183 tree_statement_list& operator = (const tree_statement_list&); | |
| 2982 | 184 }; |
| 185 | |
| 186 #endif |