Mercurial > hg > octave-nkf
annotate src/toplev.h @ 9383:d57f0c56195f
improve error handling
author | Jaroslav Hajek <highegg@gmail.com> |
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date | Tue, 23 Jun 2009 15:48:40 +0200 |
parents | 1c2d2c9f4a8d |
children | 17af7cce7d1b |
rev | line source |
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1 | 1 /* |
2 | |
7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, |
8920 | 4 2003, 2004, 2005, 2006, 2007, 2008 John W. Eaton |
1 | 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. | |
1 | 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/>. | |
1 | 21 |
22 */ | |
23 | |
1670 | 24 #if !defined (octave_toplev_h) |
25 #define octave_toplev_h 1 | |
1 | 26 |
1355 | 27 #include <cstdio> |
1 | 28 |
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29 #include <deque> |
3503 | 30 #include <string> |
31 | |
2086 | 32 class octave_value; |
2796 | 33 class octave_value_list; |
5743 | 34 class octave_function; |
5744 | 35 class octave_user_script; |
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36 class tree_statement; |
578 | 37 class tree_statement_list; |
1572 | 38 class charMatrix; |
1 | 39 |
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40 #include "quit.h" |
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41 |
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42 #include "input.h" |
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43 #include "oct-map.h" |
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44 |
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45 |
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46 typedef void (*octave_exit_func) (int); |
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47 extern OCTINTERP_API octave_exit_func octave_exit; |
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48 |
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49 extern OCTINTERP_API bool quit_allowed; |
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50 |
9383 | 51 extern OCTINTERP_API bool quitting_gracefully; |
52 | |
53 extern OCTINTERP_API int exit_status; | |
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54 |
7250 | 55 extern OCTINTERP_API void |
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56 clean_up_and_exit (int); |
574 | 57 |
7250 | 58 extern OCTINTERP_API void recover_from_exception (void); |
7202 | 59 |
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60 extern OCTINTERP_API int main_loop (void); |
1907 | 61 |
7250 | 62 extern OCTINTERP_API void |
2796 | 63 do_octave_atexit (void); |
2077 | 64 |
7409 | 65 extern OCTINTERP_API void |
66 octave_add_atexit_function (const std::string& fname); | |
67 | |
68 extern OCTINTERP_API bool | |
69 octave_remove_atexit_function (const std::string& fname); | |
70 | |
1 | 71 // Current command to execute. |
7250 | 72 extern OCTINTERP_API tree_statement_list *global_command; |
1 | 73 |
4217 | 74 // TRUE means we are ready to interpret commands, but not everything |
75 // is ready for interactive use. | |
7185 | 76 extern OCTINTERP_API bool octave_interpreter_ready; |
4217 | 77 |
4172 | 78 // TRUE means we've processed all the init code and we are good to go. |
7185 | 79 extern OCTINTERP_API bool octave_initialized; |
4172 | 80 |
5743 | 81 class |
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82 OCTINTERP_API |
5743 | 83 octave_call_stack |
84 { | |
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85 private: |
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86 |
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87 struct call_stack_elt |
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88 { |
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89 call_stack_elt (octave_function *f, symbol_table::scope_id s, |
7901 | 90 symbol_table::context_id c, size_t p = 0) |
91 : fcn (f), stmt (0), scope (s), context (c), prev (p) { } | |
92 | |
93 call_stack_elt (const call_stack_elt& elt) | |
94 : fcn (elt.fcn), stmt (elt.stmt), scope (elt.scope), | |
95 context (elt.context), prev (elt.prev) { } | |
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96 |
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97 octave_function *fcn; |
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98 tree_statement *stmt; |
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99 symbol_table::scope_id scope; |
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100 symbol_table::context_id context; |
7901 | 101 size_t prev; |
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102 }; |
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103 |
5743 | 104 protected: |
105 | |
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106 octave_call_stack (void) : cs (), curr_frame (0) { } |
5743 | 107 |
108 public: | |
109 | |
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110 typedef std::deque<call_stack_elt>::iterator iterator; |
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111 typedef std::deque<call_stack_elt>::const_iterator const_iterator; |
7901 | 112 |
113 typedef std::deque<call_stack_elt>::reverse_iterator reverse_iterator; | |
114 typedef std::deque<call_stack_elt>::const_reverse_iterator const_reverse_iterator; | |
115 | |
5743 | 116 static bool instance_ok (void) |
117 { | |
118 bool retval = true; | |
119 | |
120 if (! instance) | |
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121 { |
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122 instance = new octave_call_stack (); |
5743 | 123 |
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124 if (instance) |
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125 instance->do_push (0, symbol_table::top_scope (), 0); |
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126 else |
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127 { |
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128 ::error ("unable to create call stack object!"); |
5743 | 129 |
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130 retval = false; |
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131 } |
5743 | 132 } |
133 | |
134 return retval; | |
135 } | |
136 | |
137 // Current function (top of stack). | |
5744 | 138 static octave_function *current (void) { return top (); } |
5743 | 139 |
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140 // Current statement (top of stack). |
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141 static tree_statement *current_statement (void) { return top_statement (); } |
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142 |
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143 // Current line in current function. |
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144 static int current_line (void) |
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145 { |
7877 | 146 return instance_ok () ? instance->do_current_line () : -1; |
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147 } |
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148 |
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149 // Current column in current function. |
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150 static int current_column (void) |
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151 { |
7877 | 152 return instance_ok () ? instance->do_current_column () : -1; |
153 } | |
154 | |
155 // Line in user code caller. | |
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156 static int caller_user_code_line (void) |
7877 | 157 { |
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158 return instance_ok () ? instance->do_caller_user_code_line () : -1; |
7877 | 159 } |
160 | |
161 // Column in user code caller. | |
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162 static int caller_user_code_column (void) |
7877 | 163 { |
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164 return instance_ok () ? instance->do_caller_user_code_column () : -1; |
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165 } |
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166 |
5743 | 167 // Caller function, may be built-in. |
168 static octave_function *caller (void) | |
169 { | |
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170 return instance_ok () ? instance->do_caller () : 0; |
5743 | 171 } |
172 | |
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173 static size_t current_frame (void) |
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174 { |
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175 return instance_ok () ? instance->do_current_frame () : 0; |
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176 } |
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177 |
7890 | 178 static size_t size (void) |
179 { | |
180 return instance_ok () ? instance->do_size () : 0; | |
181 } | |
182 | |
7901 | 183 static size_t num_user_code_frames (octave_idx_type& curr_user_frame) |
184 { | |
185 return instance_ok () | |
186 ? instance->do_num_user_code_frames (curr_user_frame) : 0; | |
187 } | |
188 | |
189 static symbol_table::scope_id current_scope (void) | |
190 { | |
191 return instance_ok () ? instance->do_current_scope () : 0; | |
192 } | |
193 | |
194 static symbol_table::context_id current_context (void) | |
195 { | |
196 return instance_ok () ? instance->do_current_context () : 0; | |
197 } | |
198 | |
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199 // Function at location N on the call stack (N == 0 is current), may |
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200 // be built-in. |
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201 static octave_function *element (size_t n) |
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202 { |
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203 return instance_ok () ? instance->do_element (n) : 0; |
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204 } |
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205 |
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206 // First user-defined function on the stack. |
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207 static octave_user_code *caller_user_code (size_t nskip = 0) |
5743 | 208 { |
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209 return instance_ok () ? instance->do_caller_user_code (nskip) : 0; |
5743 | 210 } |
211 | |
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212 static void |
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213 push (octave_function *f, |
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214 symbol_table::scope_id scope = symbol_table::current_scope (), |
7901 | 215 symbol_table::context_id context = symbol_table::current_context ()) |
5743 | 216 { |
217 if (instance_ok ()) | |
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218 instance->do_push (f, scope, context); |
5743 | 219 } |
220 | |
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221 static void |
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222 push (symbol_table::scope_id scope = symbol_table::current_scope (), |
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223 symbol_table::context_id context = symbol_table::current_context ()) |
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224 { |
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225 if (instance_ok ()) |
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226 instance->do_push (0, scope, context); |
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227 } |
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228 |
5744 | 229 static octave_function *top (void) |
230 { | |
231 return instance_ok () ? instance->do_top (): 0; | |
232 } | |
233 | |
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234 static tree_statement *top_statement (void) |
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235 { |
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236 return instance_ok () ? instance->do_top_statement (): 0; |
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237 } |
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238 |
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239 static void set_statement (tree_statement *s) |
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240 { |
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241 if (instance_ok ()) |
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242 instance->do_set_statement (s); |
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243 } |
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244 |
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245 static bool goto_frame (size_t n = 0, bool verbose = false) |
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246 { |
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247 return instance_ok () ? instance->do_goto_frame (n, verbose) : false; |
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248 } |
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249 |
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250 static bool goto_frame_relative (int n, bool verbose = false) |
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251 { |
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252 return instance_ok () |
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253 ? instance->do_goto_frame_relative (n, verbose) : false; |
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254 } |
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255 |
7901 | 256 static void goto_caller_frame (void) |
257 { | |
258 if (instance_ok ()) | |
259 instance->do_goto_caller_frame (); | |
260 } | |
261 | |
262 static void goto_base_frame (void) | |
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263 { |
7901 | 264 if (instance_ok ()) |
265 instance->do_goto_base_frame (); | |
266 } | |
267 | |
268 static Octave_map backtrace (size_t nskip, octave_idx_type& curr_user_frame) | |
269 { | |
270 return instance_ok () | |
271 ? instance->do_backtrace (nskip, curr_user_frame) : Octave_map (); | |
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272 } |
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273 |
5743 | 274 static void pop (void) |
275 { | |
276 if (instance_ok ()) | |
277 instance->do_pop (); | |
278 } | |
279 | |
280 // A function for popping the top of the call stack that is suitable | |
281 // for use as an unwind_protect handler. | |
282 static void unwind_pop (void *) { pop (); } | |
283 | |
284 static void clear (void) | |
285 { | |
286 if (instance_ok ()) | |
287 instance->do_clear (); | |
288 } | |
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289 |
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290 static void backtrace_error_message (void) |
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291 { |
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292 if (instance_ok ()) |
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293 instance->do_backtrace_error_message (); |
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294 } |
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295 |
5743 | 296 private: |
297 | |
298 // The current call stack. | |
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299 std::deque<call_stack_elt> cs; |
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301 size_t curr_frame; |
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302 |
5743 | 303 static octave_call_stack *instance; |
304 | |
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305 int do_current_line (void) const; |
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306 |
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307 int do_current_column (void) const; |
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308 |
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309 int do_caller_user_code_line (void) const; |
7877 | 310 |
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311 int do_caller_user_code_column (void) const; |
7877 | 312 |
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313 octave_function *do_caller (void) const |
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314 { |
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315 return curr_frame > 1 ? cs[curr_frame-1].fcn : cs[0].fcn; |
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316 } |
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317 |
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318 size_t do_current_frame (void) { return curr_frame; } |
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319 |
7890 | 320 size_t do_size (void) { return cs.size (); } |
321 | |
7901 | 322 size_t do_num_user_code_frames (octave_idx_type& curr_user_frame) const; |
323 | |
324 symbol_table::scope_id do_current_scope (void) const | |
325 { | |
326 return curr_frame > 0 && curr_frame < cs.size () | |
327 ? cs[curr_frame].scope : 0; | |
328 } | |
329 | |
330 symbol_table::context_id do_current_context (void) const | |
331 { | |
332 return curr_frame > 0 && curr_frame < cs.size () | |
333 ? cs[curr_frame].context : 0; | |
334 } | |
335 | |
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336 octave_function *do_element (size_t n) |
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337 { |
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338 octave_function *retval = 0; |
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339 |
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340 if (cs.size () > n) |
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341 { |
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342 call_stack_elt& elt = cs[n]; |
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343 retval = elt.fcn; |
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344 } |
5743 | 345 |
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346 return retval; |
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347 } |
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348 |
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349 octave_user_code *do_caller_user_code (size_t nskip) const; |
5744 | 350 |
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351 void do_push (octave_function *f, symbol_table::scope_id scope, |
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352 symbol_table::context_id context) |
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353 { |
7901 | 354 size_t prev_frame = curr_frame; |
355 curr_frame = cs.size (); | |
356 cs.push_back (call_stack_elt (f, scope, context, prev_frame)); | |
357 symbol_table::set_scope_and_context (scope, context); | |
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358 } |
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359 |
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360 octave_function *do_top (void) const |
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361 { |
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362 octave_function *retval = 0; |
5744 | 363 |
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364 if (! cs.empty ()) |
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365 { |
7890 | 366 const call_stack_elt& elt = cs.back (); |
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367 retval = elt.fcn; |
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368 } |
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369 |
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370 return retval; |
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371 } |
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372 |
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373 tree_statement *do_top_statement (void) const |
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374 { |
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375 tree_statement *retval = 0; |
5743 | 376 |
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377 if (! cs.empty ()) |
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378 { |
7890 | 379 const call_stack_elt& elt = cs.back (); |
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380 retval = elt.stmt; |
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381 } |
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382 |
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383 return retval; |
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384 } |
5743 | 385 |
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386 void do_set_statement (tree_statement *s) |
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387 { |
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388 if (! cs.empty ()) |
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389 { |
7890 | 390 call_stack_elt& elt = cs.back (); |
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391 elt.stmt = s; |
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392 } |
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393 } |
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394 |
7901 | 395 Octave_map do_backtrace (size_t nskip, |
396 octave_idx_type& curr_user_frame) const; | |
5744 | 397 |
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398 bool do_goto_frame (size_t n, bool verbose); |
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399 |
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400 bool do_goto_frame_relative (int n, bool verbose); |
40c428ea3408
initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
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401 |
7901 | 402 void do_goto_caller_frame (void); |
403 | |
404 void do_goto_base_frame (void); | |
405 | |
5743 | 406 void do_pop (void) |
407 { | |
7901 | 408 if (cs.size () > 1) |
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initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
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changeset
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409 { |
7901 | 410 const call_stack_elt& elt = cs.back (); |
411 curr_frame = elt.prev; | |
7890 | 412 cs.pop_back (); |
7901 | 413 const call_stack_elt& new_elt = cs[curr_frame]; |
414 symbol_table::set_scope_and_context (new_elt.scope, new_elt.context); | |
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initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
7736
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changeset
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415 } |
5743 | 416 } |
417 | |
418 void do_clear (void) { cs.clear (); } | |
8011
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improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
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419 |
8013
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call backtrace_error_message in eval functions, not when popping stack
John W. Eaton <jwe@octave.org>
parents:
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420 void do_backtrace_error_message (void) const; |
5743 | 421 }; |
422 | |
1 | 423 #endif |
424 | |
425 /* | |
426 ;;; Local Variables: *** | |
427 ;;; mode: C++ *** | |
428 ;;; End: *** | |
429 */ |