Mercurial > octave
annotate libinterp/corefcn/toplev.h @ 20956:850e3d2533d4
maint: Eliminate more useless statements after error().
* __ilu__.cc, display.cc, file-io.cc, graphics.cc, graphics.in.h, hex2num.cc,
load-save.cc, ls-mat-ascii.cc, oct-errno.in.cc, pager.cc, sighandlers.cc,
sub2ind.cc, symtab.h, syscalls.cc, toplev.h, txt-eng-ft.cc, __eigs__.cc,
ov-bool-mat.cc, ov-classdef.h, ov-cx-mat.cc, ov-fcn-handle.cc,
ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-re-mat.cc, ov-str-mat.cc, ov-struct.cc,
ov-typeinfo.cc, ov-usr-fcn.cc:
maint: Eliminate more useless statements after error().
author | Rik <rik@octave.org> |
---|---|
date | Sun, 20 Dec 2015 13:26:17 -0800 |
parents | 6eff66fb8a02 |
children | 1473547f50f5 |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2015 John W. Eaton |
1 | 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. | |
1 | 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/>. | |
1 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_toplev_h) |
1670 | 24 #define octave_toplev_h 1 |
1 | 25 |
1355 | 26 #include <cstdio> |
1 | 27 |
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28 #include <deque> |
3503 | 29 #include <string> |
30 | |
2086 | 31 class octave_value; |
2796 | 32 class octave_value_list; |
5743 | 33 class octave_function; |
5744 | 34 class octave_user_script; |
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35 class tree_statement; |
578 | 36 class tree_statement_list; |
1572 | 37 class charMatrix; |
1 | 38 |
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39 #include "quit.h" |
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40 |
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41 #include "input.h" |
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42 #include "oct-map.h" |
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43 #include "symtab.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 status, bool safe_to_return = false); |
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 |
7409 | 63 octave_add_atexit_function (const std::string& fname); |
64 | |
65 extern OCTINTERP_API bool | |
66 octave_remove_atexit_function (const std::string& fname); | |
67 | |
4217 | 68 // TRUE means we are ready to interpret commands, but not everything |
69 // is ready for interactive use. | |
7185 | 70 extern OCTINTERP_API bool octave_interpreter_ready; |
4217 | 71 |
4172 | 72 // TRUE means we've processed all the init code and we are good to go. |
7185 | 73 extern OCTINTERP_API bool octave_initialized; |
4172 | 74 |
5743 | 75 class |
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76 OCTINTERP_API |
5743 | 77 octave_call_stack |
78 { | |
79 protected: | |
80 | |
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81 octave_call_stack (void) : cs (), curr_frame (0) { } |
5743 | 82 |
83 public: | |
84 | |
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85 class stack_frame |
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86 { |
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87 public: |
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88 |
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89 friend class octave_call_stack; |
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90 |
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91 stack_frame (octave_function *fcn = 0, symbol_table::scope_id scope = 0, |
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92 symbol_table::context_id context = 0, size_t prev = 0) |
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93 : m_fcn (fcn), m_line (-1), m_column (-1), m_scope (scope), |
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94 m_context (context), m_prev (prev) |
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95 { } |
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96 |
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97 stack_frame (const stack_frame& elt) |
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98 : m_fcn (elt.m_fcn), m_line (elt.m_line), m_column (elt.m_column), |
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99 m_scope (elt.m_scope), m_context (elt.m_context), m_prev (elt.m_prev) |
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100 { } |
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101 |
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102 int line (void) const { return m_line; } |
7901 | 103 |
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104 int column (void) const { return m_column; } |
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105 |
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106 std::string fcn_file_name (void) const; |
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107 |
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108 std::string fcn_name (bool print_subfn = true) const; |
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109 |
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110 bool operator== (const stack_frame &rhs) const; |
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111 |
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112 private: |
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113 |
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114 octave_function *m_fcn; |
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115 int m_line; |
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116 int m_column; |
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117 symbol_table::scope_id m_scope; |
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118 symbol_table::context_id m_context; |
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119 size_t m_prev; |
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120 }; |
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121 |
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122 typedef std::deque<stack_frame>::iterator iterator; |
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123 typedef std::deque<stack_frame>::const_iterator const_iterator; |
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124 |
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125 typedef std::deque<stack_frame>::reverse_iterator reverse_iterator; |
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126 typedef std::deque<stack_frame>::const_reverse_iterator const_reverse_iterator; |
7901 | 127 |
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128 static void create_instance (void); |
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129 |
5743 | 130 static bool instance_ok (void) |
131 { | |
132 bool retval = true; | |
133 | |
134 if (! instance) | |
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135 create_instance (); |
5743 | 136 |
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137 if (! instance) |
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138 error ("unable to create call stack object!"); |
5743 | 139 |
140 return retval; | |
141 } | |
142 | |
143 // Current function (top of stack). | |
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144 static octave_function *current (void) |
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145 { |
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146 return instance_ok () ? instance->do_current () : 0; |
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147 } |
5743 | 148 |
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149 // Current line in current function. |
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150 static int current_line (void) |
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151 { |
7877 | 152 return instance_ok () ? instance->do_current_line () : -1; |
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153 } |
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154 |
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155 // Current column in current function. |
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156 static int current_column (void) |
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157 { |
7877 | 158 return instance_ok () ? instance->do_current_column () : -1; |
159 } | |
160 | |
161 // Line in user code caller. | |
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162 static int caller_user_code_line (void) |
7877 | 163 { |
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164 return instance_ok () ? instance->do_caller_user_code_line () : -1; |
7877 | 165 } |
166 | |
167 // Column in user code caller. | |
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168 static int caller_user_code_column (void) |
7877 | 169 { |
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170 return instance_ok () ? instance->do_caller_user_code_column () : -1; |
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171 } |
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172 |
5743 | 173 // Caller function, may be built-in. |
174 static octave_function *caller (void) | |
175 { | |
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176 return instance_ok () ? instance->do_caller () : 0; |
5743 | 177 } |
178 | |
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179 static size_t current_frame (void) |
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180 { |
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181 return instance_ok () ? instance->do_current_frame () : 0; |
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182 } |
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183 |
7890 | 184 static size_t size (void) |
185 { | |
186 return instance_ok () ? instance->do_size () : 0; | |
187 } | |
188 | |
7901 | 189 static size_t num_user_code_frames (octave_idx_type& curr_user_frame) |
190 { | |
191 return instance_ok () | |
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192 ? instance->do_num_user_code_frames (curr_user_frame) : 0; |
7901 | 193 } |
194 | |
195 static symbol_table::scope_id current_scope (void) | |
196 { | |
197 return instance_ok () ? instance->do_current_scope () : 0; | |
198 } | |
199 | |
200 static symbol_table::context_id current_context (void) | |
201 { | |
202 return instance_ok () ? instance->do_current_context () : 0; | |
203 } | |
204 | |
20946 | 205 #if 0 |
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206 static stack_frame frame (size_t idx) |
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207 { |
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208 return instance_ok () ? instance->do_frame (idx) : stack_frame (); |
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209 } |
20946 | 210 #endif |
211 | |
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212 // Function at location N on the call stack (N == 0 is current), may |
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213 // be built-in. |
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214 static octave_function *element (size_t n) |
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215 { |
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216 return instance_ok () ? instance->do_element (n) : 0; |
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217 } |
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218 |
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219 // First user-defined function on the stack. |
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220 static octave_user_code *caller_user_code (size_t nskip = 0) |
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222 return instance_ok () ? instance->do_caller_user_code (nskip) : 0; |
5743 | 223 } |
224 | |
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225 // Return TRUE if all elements on the call stack are scripts. |
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226 static bool all_scripts (void) |
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227 { |
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228 return instance_ok () ? instance->do_all_scripts () : false; |
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229 } |
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230 |
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231 static void |
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232 push (octave_function *f, |
10313 | 233 symbol_table::scope_id scope = symbol_table::current_scope (), |
234 symbol_table::context_id context = symbol_table::current_context ()) | |
5743 | 235 { |
236 if (instance_ok ()) | |
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237 instance->do_push (f, scope, context); |
5743 | 238 } |
239 | |
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240 static void |
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241 push (symbol_table::scope_id scope = symbol_table::current_scope (), |
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243 { |
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244 if (instance_ok ()) |
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245 instance->do_push (0, scope, context); |
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246 } |
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247 |
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248 static void set_location (int l, int c) |
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249 { |
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250 if (instance_ok ()) |
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251 instance->do_set_location (l, c); |
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252 } |
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253 |
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254 static void set_line (int l) |
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255 { |
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256 if (instance_ok ()) |
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257 instance->do_set_line (l); |
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258 } |
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259 |
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260 static void set_column (int c) |
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261 { |
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262 if (instance_ok ()) |
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263 instance->do_set_column (c); |
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264 } |
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265 |
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266 static bool goto_frame (size_t n = 0, bool verbose = false) |
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267 { |
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268 return instance_ok () ? instance->do_goto_frame (n, verbose) : false; |
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269 } |
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270 |
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271 static void restore_frame (size_t n) |
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272 { |
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273 goto_frame (n); |
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274 } |
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275 |
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276 static bool goto_frame_relative (int n, bool verbose = false) |
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277 { |
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278 return instance_ok () |
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279 ? instance->do_goto_frame_relative (n, verbose) : false; |
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280 } |
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281 |
7901 | 282 static void goto_caller_frame (void) |
283 { | |
284 if (instance_ok ()) | |
285 instance->do_goto_caller_frame (); | |
286 } | |
287 | |
288 static void goto_base_frame (void) | |
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289 { |
7901 | 290 if (instance_ok ()) |
291 instance->do_goto_base_frame (); | |
292 } | |
293 | |
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294 static octave_map backtrace (size_t nskip = 0) |
7901 | 295 { |
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296 octave_idx_type curr_user_frame = -1; |
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297 |
7901 | 298 return instance_ok () |
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299 ? instance->do_backtrace (nskip, curr_user_frame, true) |
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300 : octave_map (); |
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301 } |
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302 |
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303 static octave_map backtrace (size_t nskip, octave_idx_type& curr_user_frame, |
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304 bool print_subfn = true) |
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305 { |
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306 return instance_ok () |
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307 ? instance->do_backtrace (nskip, curr_user_frame, print_subfn) |
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308 : octave_map (); |
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309 } |
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310 |
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311 static std::list<octave_call_stack::stack_frame> |
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312 backtrace_frames (size_t nskip = 0) |
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313 { |
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314 octave_idx_type curr_user_frame = -1; |
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315 |
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316 return instance_ok () |
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317 ? instance->do_backtrace_frames (nskip, curr_user_frame) |
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318 : std::list<octave_call_stack::stack_frame> (); |
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319 } |
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320 |
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321 static std::list<octave_call_stack::stack_frame> |
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322 backtrace_frames (size_t nskip, octave_idx_type& curr_user_frame) |
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323 { |
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324 return instance_ok () |
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325 ? instance->do_backtrace_frames (nskip, curr_user_frame) |
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326 : std::list<octave_call_stack::stack_frame> (); |
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327 } |
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328 |
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329 static octave_map empty_backtrace (void); |
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330 |
5743 | 331 static void pop (void) |
332 { | |
333 if (instance_ok ()) | |
334 instance->do_pop (); | |
335 } | |
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336 |
5743 | 337 static void clear (void) |
338 { | |
339 if (instance_ok ()) | |
340 instance->do_clear (); | |
341 } | |
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342 |
5743 | 343 private: |
344 | |
345 // The current call stack. | |
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346 std::deque<stack_frame> cs; |
5743 | 347 |
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348 size_t curr_frame; |
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349 |
5743 | 350 static octave_call_stack *instance; |
351 | |
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352 static void cleanup_instance (void) { delete instance; instance = 0; } |
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353 |
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354 int do_current_line (void) const; |
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355 |
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356 int do_current_column (void) const; |
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357 |
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358 int do_caller_user_code_line (void) const; |
7877 | 359 |
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360 int do_caller_user_code_column (void) const; |
7877 | 361 |
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362 octave_function *do_caller (void) const |
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363 { |
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364 return curr_frame > 1 ? cs[curr_frame-1].m_fcn : cs[0].m_fcn; |
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365 } |
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366 |
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367 size_t do_current_frame (void) { return curr_frame; } |
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368 |
7890 | 369 size_t do_size (void) { return cs.size (); } |
370 | |
7901 | 371 size_t do_num_user_code_frames (octave_idx_type& curr_user_frame) const; |
372 | |
373 symbol_table::scope_id do_current_scope (void) const | |
374 { | |
375 return curr_frame > 0 && curr_frame < cs.size () | |
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376 ? cs[curr_frame].m_scope : 0; |
7901 | 377 } |
378 | |
379 symbol_table::context_id do_current_context (void) const | |
380 { | |
381 return curr_frame > 0 && curr_frame < cs.size () | |
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382 ? cs[curr_frame].m_context : 0; |
7901 | 383 } |
384 | |
20946 | 385 #if 0 |
386 const stack_frame& do_frame (size_t idx) | |
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387 { |
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388 static stack_frame foobar; |
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389 |
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390 return idx < cs.size () ? cs[idx] : foobar; |
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391 } |
20946 | 392 #endif |
393 | |
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394 octave_function *do_element (size_t n) |
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395 { |
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396 octave_function *retval = 0; |
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397 |
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398 if (cs.size () > n) |
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399 { |
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400 stack_frame& elt = cs[n]; |
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401 retval = elt.m_fcn; |
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402 } |
5743 | 403 |
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404 return retval; |
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405 } |
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406 |
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407 octave_user_code *do_caller_user_code (size_t nskip) const; |
5744 | 408 |
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409 bool do_all_scripts (void) const; |
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410 |
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411 void do_push (octave_function *fcn, symbol_table::scope_id scope, |
10313 | 412 symbol_table::context_id context) |
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413 { |
7901 | 414 size_t prev_frame = curr_frame; |
415 curr_frame = cs.size (); | |
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416 cs.push_back (stack_frame (fcn, scope, context, prev_frame)); |
7901 | 417 symbol_table::set_scope_and_context (scope, context); |
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418 } |
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419 |
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420 octave_function *do_current (void) const |
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421 { |
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422 octave_function *retval = 0; |
5744 | 423 |
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424 if (! cs.empty ()) |
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425 { |
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426 const stack_frame& elt = cs[curr_frame]; |
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427 retval = elt.m_fcn; |
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428 } |
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429 |
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430 return retval; |
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431 } |
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432 |
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433 void do_set_location (int l, int c) |
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434 { |
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435 if (! cs.empty ()) |
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436 { |
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437 stack_frame& elt = cs.back (); |
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438 |
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439 elt.m_line = l; |
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440 elt.m_column = c; |
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441 } |
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442 } |
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443 |
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444 void do_set_line (int l) |
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445 { |
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446 if (! cs.empty ()) |
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447 { |
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448 stack_frame& elt = cs.back (); |
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449 |
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450 elt.m_line = l; |
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451 } |
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452 } |
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453 |
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454 void do_set_column (int c) |
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455 { |
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456 if (! cs.empty ()) |
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457 { |
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458 stack_frame& elt = cs.back (); |
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459 |
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460 elt.m_column = c; |
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461 } |
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462 } |
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463 |
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464 std::list<octave_call_stack::stack_frame> |
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465 do_backtrace_frames (size_t nskip, octave_idx_type& curr_user_frame) const; |
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466 |
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467 octave_map do_backtrace (size_t nskip, |
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468 octave_idx_type& curr_user_frame, |
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469 bool print_subfn) const; |
5744 | 470 |
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471 bool do_goto_frame (size_t n, bool verbose); |
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472 |
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473 bool do_goto_frame_relative (int n, bool verbose); |
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474 |
7901 | 475 void do_goto_caller_frame (void); |
476 | |
477 void do_goto_base_frame (void); | |
478 | |
5743 | 479 void do_pop (void) |
480 { | |
7901 | 481 if (cs.size () > 1) |
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482 { |
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483 const stack_frame& elt = cs.back (); |
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484 curr_frame = elt.m_prev; |
10313 | 485 cs.pop_back (); |
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486 const stack_frame& new_elt = cs[curr_frame]; |
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487 symbol_table::set_scope_and_context (new_elt.m_scope, new_elt.m_context); |
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488 } |
5743 | 489 } |
490 | |
491 void do_clear (void) { cs.clear (); } | |
492 }; | |
493 | |
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494 // Call a function with exceptions handled to avoid problems with |
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495 // errors while shutting down. |
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496 |
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497 #define OCTAVE_IGNORE_EXCEPTION(E) \ |
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498 catch (E) \ |
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499 { \ |
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500 std::cerr << "error: ignoring " #E " while preparing to exit" << std::endl; \ |
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501 recover_from_exception (); \ |
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502 } |
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503 |
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504 #define OCTAVE_SAFE_CALL(F, ARGS) \ |
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505 do \ |
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506 { \ |
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parents:
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507 try \ |
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parents:
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508 { \ |
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509 unwind_protect frame; \ |
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parents:
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510 \ |
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parents:
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511 frame.protect_var (Vdebug_on_error); \ |
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parents:
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512 frame.protect_var (Vdebug_on_warning); \ |
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parents:
13983
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513 \ |
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parents:
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514 Vdebug_on_error = false; \ |
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parents:
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515 Vdebug_on_warning = false; \ |
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parents:
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516 \ |
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parents:
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517 F ARGS; \ |
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parents:
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518 } \ |
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519 OCTAVE_IGNORE_EXCEPTION (const octave_interrupt_exception&) \ |
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520 OCTAVE_IGNORE_EXCEPTION (const octave_execution_exception&) \ |
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521 OCTAVE_IGNORE_EXCEPTION (const std::bad_alloc&) \ |
14014
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parents:
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522 } \ |
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parents:
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523 while (0) |
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524 |
1 | 525 #endif |