Mercurial > vim
annotate src/ex_eval.c @ 19774:00a1b89256ea v8.2.0443
patch 8.2.0443: clipboard code is spread out
Commit: https://github.com/vim/vim/commit/45fffdf10b7cb6e59794e76e9b8a2930fcb4b192
Author: Bram Moolenaar <Bram@vim.org>
Date: Tue Mar 24 21:42:01 2020 +0100
patch 8.2.0443: clipboard code is spread out
Problem: Clipboard code is spread out.
Solution: Move clipboard code to its own file. (Yegappan Lakshmanan,
closes #5827)
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Tue, 24 Mar 2020 21:45:04 +0100 |
| parents | 94eda51ba9ba |
| children | 5feb426d2ea1 |
| rev | line source |
|---|---|
|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 * ex_eval.c: functions for Ex command line for the +eval feature. | |
| 12 */ | |
| 13 | |
| 14 #include "vim.h" | |
| 15 | |
| 16 #if defined(FEAT_EVAL) || defined(PROTO) | |
| 17 | |
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18 static char *get_end_emsg(cstack_T *cstack); |
| 7 | 19 |
| 20 /* | |
| 21 * Exception handling terms: | |
| 22 * | |
| 23 * :try ":try" command \ | |
| 24 * ... try block | | |
| 25 * :catch RE ":catch" command | | |
| 26 * ... catch clause |- try conditional | |
| 27 * :finally ":finally" command | | |
| 28 * ... finally clause | | |
| 29 * :endtry ":endtry" command / | |
| 30 * | |
| 31 * The try conditional may have any number of catch clauses and at most one | |
| 32 * finally clause. A ":throw" command can be inside the try block, a catch | |
| 33 * clause, the finally clause, or in a function called or script sourced from | |
| 34 * there or even outside the try conditional. Try conditionals may be nested. | |
| 35 */ | |
| 36 | |
| 37 /* | |
| 38 * Configuration whether an exception is thrown on error or interrupt. When | |
| 39 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or | |
| 40 * interrupt (got_int) under an active try conditional terminates the script | |
| 41 * after the non-active finally clauses of all active try conditionals have been | |
| 42 * executed. Otherwise, errors and/or interrupts are converted into catchable | |
| 43 * exceptions (did_throw additionally set), which terminate the script only if | |
| 44 * not caught. For user exceptions, only did_throw is set. (Note: got_int can | |
| 4352 | 45 * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not |
| 7 | 46 * a reliant test that the exception currently being thrown is an interrupt |
| 47 * exception. Similarly, did_emsg can be set afterwards on an error in an | |
| 48 * (unskipped) conditional command inside an inactive conditional, so did_throw | |
| 49 * && did_emsg is not a reliant test that the exception currently being thrown | |
| 50 * is an error exception.) - The macros can be defined as expressions checking | |
| 51 * for a variable that is allowed to be changed during execution of a script. | |
| 52 */ | |
| 53 #if 0 | |
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54 // Expressions used for testing during the development phase. |
| 7 | 55 # define THROW_ON_ERROR (!eval_to_number("$VIMNOERRTHROW")) |
| 56 # define THROW_ON_INTERRUPT (!eval_to_number("$VIMNOINTTHROW")) | |
| 57 # define THROW_TEST | |
| 58 #else | |
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59 // Values used for the Vim release. |
| 7 | 60 # define THROW_ON_ERROR TRUE |
| 1880 | 61 # define THROW_ON_ERROR_TRUE |
| 7 | 62 # define THROW_ON_INTERRUPT TRUE |
| 1880 | 63 # define THROW_ON_INTERRUPT_TRUE |
| 7 | 64 #endif |
| 65 | |
| 66 /* | |
| 67 * When several errors appear in a row, setting "force_abort" is delayed until | |
| 68 * the failing command returned. "cause_abort" is set to TRUE meanwhile, in | |
| 69 * order to indicate that situation. This is useful when "force_abort" was set | |
| 70 * during execution of a function call from an expression: the aborting of the | |
| 71 * expression evaluation is done without producing any error messages, but all | |
| 72 * error messages on parsing errors during the expression evaluation are given | |
| 73 * (even if a try conditional is active). | |
| 74 */ | |
| 75 static int cause_abort = FALSE; | |
| 76 | |
| 77 /* | |
| 1214 | 78 * Return TRUE when immediately aborting on error, or when an interrupt |
| 7 | 79 * occurred or an exception was thrown but not caught. Use for ":{range}call" |
| 80 * to check whether an aborted function that does not handle a range itself | |
| 81 * should be called again for the next line in the range. Also used for | |
| 82 * cancelling expression evaluation after a function call caused an immediate | |
| 83 * abort. Note that the first emsg() call temporarily resets "force_abort" | |
| 84 * until the throw point for error messages has been reached. That is, during | |
| 85 * cancellation of an expression evaluation after an aborting function call or | |
| 86 * due to a parsing error, aborting() always returns the same value. | |
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87 * "got_int" is also set by calling interrupt(). |
| 7 | 88 */ |
| 89 int | |
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90 aborting(void) |
| 7 | 91 { |
| 92 return (did_emsg && force_abort) || got_int || did_throw; | |
| 93 } | |
| 94 | |
| 95 /* | |
| 96 * The value of "force_abort" is temporarily reset by the first emsg() call | |
| 97 * during an expression evaluation, and "cause_abort" is used instead. It might | |
| 98 * be necessary to restore "force_abort" even before the throw point for the | |
| 99 * error message has been reached. update_force_abort() should be called then. | |
| 100 */ | |
| 101 void | |
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102 update_force_abort(void) |
| 7 | 103 { |
| 104 if (cause_abort) | |
| 105 force_abort = TRUE; | |
| 106 } | |
| 107 | |
| 108 /* | |
| 109 * Return TRUE if a command with a subcommand resulting in "retcode" should | |
| 110 * abort the script processing. Can be used to suppress an autocommand after | |
| 111 * execution of a failing subcommand as long as the error message has not been | |
| 112 * displayed and actually caused the abortion. | |
| 113 */ | |
| 114 int | |
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115 should_abort(int retcode) |
| 7 | 116 { |
| 117 return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting()); | |
| 118 } | |
| 119 | |
| 120 /* | |
| 121 * Return TRUE if a function with the "abort" flag should not be considered | |
| 122 * ended on an error. This means that parsing commands is continued in order | |
| 123 * to find finally clauses to be executed, and that some errors in skipped | |
| 124 * commands are still reported. | |
| 125 */ | |
| 126 int | |
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127 aborted_in_try(void) |
| 7 | 128 { |
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129 // This function is only called after an error. In this case, "force_abort" |
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130 // determines whether searching for finally clauses is necessary. |
| 7 | 131 return force_abort; |
| 132 } | |
| 133 | |
| 134 /* | |
| 135 * cause_errthrow(): Cause a throw of an error exception if appropriate. | |
| 136 * Return TRUE if the error message should not be displayed by emsg(). | |
| 137 * Sets "ignore", if the emsg() call should be ignored completely. | |
| 138 * | |
| 139 * When several messages appear in the same command, the first is usually the | |
| 140 * most specific one and used as the exception value. The "severe" flag can be | |
| 141 * set to TRUE, if a later but severer message should be used instead. | |
| 142 */ | |
| 143 int | |
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144 cause_errthrow( |
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145 char_u *mesg, |
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146 int severe, |
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147 int *ignore) |
| 7 | 148 { |
| 149 struct msglist *elem; | |
| 150 struct msglist **plist; | |
| 151 | |
| 152 /* | |
| 839 | 153 * Do nothing when displaying the interrupt message or reporting an |
| 154 * uncaught exception (which has already been discarded then) at the top | |
| 155 * level. Also when no exception can be thrown. The message will be | |
| 156 * displayed by emsg(). | |
| 7 | 157 */ |
| 158 if (suppress_errthrow) | |
| 159 return FALSE; | |
| 160 | |
| 161 /* | |
| 839 | 162 * If emsg() has not been called previously, temporarily reset |
| 163 * "force_abort" until the throw point for error messages has been | |
| 164 * reached. This ensures that aborting() returns the same value for all | |
| 165 * errors that appear in the same command. This means particularly that | |
| 166 * for parsing errors during expression evaluation emsg() will be called | |
| 167 * multiply, even when the expression is evaluated from a finally clause | |
| 168 * that was activated due to an aborting error, interrupt, or exception. | |
| 7 | 169 */ |
| 170 if (!did_emsg) | |
| 171 { | |
| 172 cause_abort = force_abort; | |
| 173 force_abort = FALSE; | |
| 174 } | |
| 175 | |
| 176 /* | |
| 177 * If no try conditional is active and no exception is being thrown and | |
| 178 * there has not been an error in a try conditional or a throw so far, do | |
| 839 | 179 * nothing (for compatibility of non-EH scripts). The message will then |
| 180 * be displayed by emsg(). When ":silent!" was used and we are not | |
| 181 * currently throwing an exception, do nothing. The message text will | |
| 182 * then be stored to v:errmsg by emsg() without displaying it. | |
| 7 | 183 */ |
| 184 if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw) | |
| 185 return FALSE; | |
| 186 | |
| 187 /* | |
| 188 * Ignore an interrupt message when inside a try conditional or when an | |
| 839 | 189 * exception is being thrown or when an error in a try conditional or |
| 190 * throw has been detected previously. This is important in order that an | |
| 7 | 191 * interrupt exception is catchable by the innermost try conditional and |
| 192 * not replaced by an interrupt message error exception. | |
| 193 */ | |
| 194 if (mesg == (char_u *)_(e_interr)) | |
| 195 { | |
| 196 *ignore = TRUE; | |
| 197 return TRUE; | |
| 198 } | |
| 199 | |
| 200 /* | |
| 201 * Ensure that all commands in nested function calls and sourced files | |
| 202 * are aborted immediately. | |
| 203 */ | |
| 204 cause_abort = TRUE; | |
| 205 | |
| 206 /* | |
| 207 * When an exception is being thrown, some commands (like conditionals) are | |
| 208 * not skipped. Errors in those commands may affect what of the subsequent | |
| 209 * commands are regarded part of catch and finally clauses. Catching the | |
| 210 * exception would then cause execution of commands not intended by the | |
| 211 * user, who wouldn't even get aware of the problem. Therefor, discard the | |
| 212 * exception currently being thrown to prevent it from being caught. Just | |
| 213 * execute finally clauses and terminate. | |
| 214 */ | |
| 215 if (did_throw) | |
| 216 { | |
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217 // When discarding an interrupt exception, reset got_int to prevent the |
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218 // same interrupt being converted to an exception again and discarding |
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219 // the error exception we are about to throw here. |
| 7 | 220 if (current_exception->type == ET_INTERRUPT) |
| 221 got_int = FALSE; | |
| 222 discard_current_exception(); | |
| 223 } | |
| 224 | |
| 225 #ifdef THROW_TEST | |
| 226 if (!THROW_ON_ERROR) | |
| 227 { | |
| 228 /* | |
| 229 * Print error message immediately without searching for a matching | |
| 230 * catch clause; just finally clauses are executed before the script | |
| 231 * is terminated. | |
| 232 */ | |
| 233 return FALSE; | |
| 234 } | |
| 235 else | |
| 236 #endif | |
| 237 { | |
| 238 /* | |
| 239 * Prepare the throw of an error exception, so that everything will | |
| 240 * be aborted (except for executing finally clauses), until the error | |
| 241 * exception is caught; if still uncaught at the top level, the error | |
| 242 * message will be displayed and the script processing terminated | |
| 243 * then. - This function has no access to the conditional stack. | |
| 244 * Thus, the actual throw is made after the failing command has | |
| 245 * returned. - Throw only the first of several errors in a row, except | |
| 246 * a severe error is following. | |
| 247 */ | |
| 248 if (msg_list != NULL) | |
| 249 { | |
| 250 plist = msg_list; | |
| 251 while (*plist != NULL) | |
| 252 plist = &(*plist)->next; | |
| 253 | |
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254 elem = ALLOC_ONE(struct msglist); |
| 7 | 255 if (elem == NULL) |
| 256 { | |
| 257 suppress_errthrow = TRUE; | |
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258 emsg(_(e_outofmem)); |
| 7 | 259 } |
| 260 else | |
| 261 { | |
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262 elem->msg = (char *)vim_strsave(mesg); |
| 7 | 263 if (elem->msg == NULL) |
| 264 { | |
| 265 vim_free(elem); | |
| 266 suppress_errthrow = TRUE; | |
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267 emsg(_(e_outofmem)); |
| 7 | 268 } |
| 269 else | |
| 270 { | |
| 271 elem->next = NULL; | |
| 272 elem->throw_msg = NULL; | |
| 273 *plist = elem; | |
| 274 if (plist == msg_list || severe) | |
| 275 { | |
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276 char *tmsg; |
| 7 | 277 |
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278 // Skip the extra "Vim " prefix for message "E458". |
| 7 | 279 tmsg = elem->msg; |
| 280 if (STRNCMP(tmsg, "Vim E", 5) == 0 | |
| 281 && VIM_ISDIGIT(tmsg[5]) | |
| 282 && VIM_ISDIGIT(tmsg[6]) | |
| 283 && VIM_ISDIGIT(tmsg[7]) | |
| 284 && tmsg[8] == ':' | |
| 285 && tmsg[9] == ' ') | |
| 286 (*msg_list)->throw_msg = &tmsg[4]; | |
| 287 else | |
| 288 (*msg_list)->throw_msg = tmsg; | |
| 289 } | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 return TRUE; | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 /* | |
| 298 * Free a "msg_list" and the messages it contains. | |
| 299 */ | |
| 300 static void | |
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301 free_msglist(struct msglist *l) |
| 7 | 302 { |
| 303 struct msglist *messages, *next; | |
| 304 | |
| 305 messages = l; | |
| 306 while (messages != NULL) | |
| 307 { | |
| 308 next = messages->next; | |
| 309 vim_free(messages->msg); | |
| 310 vim_free(messages); | |
| 311 messages = next; | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 /* | |
| 5517 | 316 * Free global "*msg_list" and the messages it contains, then set "*msg_list" |
| 317 * to NULL. | |
| 318 */ | |
| 319 void | |
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320 free_global_msglist(void) |
| 5517 | 321 { |
| 322 free_msglist(*msg_list); | |
| 323 *msg_list = NULL; | |
| 324 } | |
| 325 | |
| 326 /* | |
| 7 | 327 * Throw the message specified in the call to cause_errthrow() above as an |
| 328 * error exception. If cstack is NULL, postpone the throw until do_cmdline() | |
| 329 * has returned (see do_one_cmd()). | |
| 330 */ | |
| 331 void | |
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332 do_errthrow(cstack_T *cstack, char_u *cmdname) |
| 7 | 333 { |
| 334 /* | |
| 335 * Ensure that all commands in nested function calls and sourced files | |
| 336 * are aborted immediately. | |
| 337 */ | |
| 338 if (cause_abort) | |
| 339 { | |
| 340 cause_abort = FALSE; | |
| 341 force_abort = TRUE; | |
| 342 } | |
| 343 | |
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344 // If no exception is to be thrown or the conversion should be done after |
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345 // returning to a previous invocation of do_one_cmd(), do nothing. |
| 1046 | 346 if (msg_list == NULL || *msg_list == NULL) |
| 7 | 347 return; |
| 348 | |
| 349 if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL) | |
| 350 free_msglist(*msg_list); | |
| 351 else | |
| 352 { | |
| 353 if (cstack != NULL) | |
| 354 do_throw(cstack); | |
| 355 else | |
| 356 need_rethrow = TRUE; | |
| 357 } | |
| 358 *msg_list = NULL; | |
| 359 } | |
| 360 | |
| 361 /* | |
| 362 * do_intthrow(): Replace the current exception by an interrupt or interrupt | |
| 363 * exception if appropriate. Return TRUE if the current exception is discarded, | |
| 364 * FALSE otherwise. | |
| 365 */ | |
| 366 int | |
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367 do_intthrow(cstack_T *cstack) |
| 7 | 368 { |
| 369 /* | |
| 370 * If no interrupt occurred or no try conditional is active and no exception | |
| 371 * is being thrown, do nothing (for compatibility of non-EH scripts). | |
| 372 */ | |
| 373 if (!got_int || (trylevel == 0 && !did_throw)) | |
| 374 return FALSE; | |
| 375 | |
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376 #ifdef THROW_TEST // avoid warning for condition always true |
| 7 | 377 if (!THROW_ON_INTERRUPT) |
| 378 { | |
| 379 /* | |
| 380 * The interrupt aborts everything except for executing finally clauses. | |
| 381 * Discard any user or error or interrupt exception currently being | |
| 382 * thrown. | |
| 383 */ | |
| 384 if (did_throw) | |
| 385 discard_current_exception(); | |
| 386 } | |
| 387 else | |
| 388 #endif | |
| 389 { | |
| 390 /* | |
| 391 * Throw an interrupt exception, so that everything will be aborted | |
| 392 * (except for executing finally clauses), until the interrupt exception | |
| 393 * is caught; if still uncaught at the top level, the script processing | |
| 394 * will be terminated then. - If an interrupt exception is already | |
| 395 * being thrown, do nothing. | |
| 396 * | |
| 397 */ | |
| 398 if (did_throw) | |
| 399 { | |
| 400 if (current_exception->type == ET_INTERRUPT) | |
| 401 return FALSE; | |
| 402 | |
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403 // An interrupt exception replaces any user or error exception. |
| 7 | 404 discard_current_exception(); |
| 405 } | |
| 406 if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL) | |
| 407 do_throw(cstack); | |
| 408 } | |
| 409 | |
| 410 return TRUE; | |
| 411 } | |
| 412 | |
| 413 /* | |
| 5517 | 414 * Get an exception message that is to be stored in current_exception->value. |
| 7 | 415 */ |
|
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416 char * |
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417 get_exception_string( |
|
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
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|
418 void *value, |
|
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commit https://github.com/vim/vim/commit/8a5883b7488e492419dde7e1637cc72f2d566ba4
Christian Brabandt <cb@256bit.org>
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|
419 except_type_T type, |
|
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changeset
|
420 char_u *cmdname, |
|
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
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|
421 int *should_free) |
| 7 | 422 { |
|
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423 char *ret; |
|
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|
424 char *mesg; |
| 7 | 425 int cmdlen; |
|
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|
426 char *p, *val; |
| 7 | 427 |
| 428 if (type == ET_ERROR) | |
| 429 { | |
|
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commit https://github.com/vim/vim/commit/9ef00be261115acb5bae3b3ca45c1d86a19ba2c7
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|
430 *should_free = TRUE; |
| 5517 | 431 mesg = ((struct msglist *)value)->throw_msg; |
| 7 | 432 if (cmdname != NULL && *cmdname != NUL) |
| 433 { | |
| 835 | 434 cmdlen = (int)STRLEN(cmdname); |
|
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|
435 ret = (char *)vim_strnsave((char_u *)"Vim(", |
| 7 | 436 4 + cmdlen + 2 + (int)STRLEN(mesg)); |
| 5517 | 437 if (ret == NULL) |
| 438 return ret; | |
| 439 STRCPY(&ret[4], cmdname); | |
| 440 STRCPY(&ret[4 + cmdlen], "):"); | |
| 441 val = ret + 4 + cmdlen + 2; | |
| 7 | 442 } |
| 443 else | |
| 444 { | |
|
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445 ret = (char *)vim_strnsave((char_u *)"Vim:", 4 + (int)STRLEN(mesg)); |
| 5517 | 446 if (ret == NULL) |
| 447 return ret; | |
| 448 val = ret + 4; | |
| 7 | 449 } |
| 450 | |
|
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451 // msg_add_fname may have been used to prefix the message with a file |
|
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452 // name in quotes. In the exception value, put the file name in |
|
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|
453 // parentheses and move it to the end. |
| 7 | 454 for (p = mesg; ; p++) |
| 455 { | |
| 456 if (*p == NUL | |
| 457 || (*p == 'E' | |
| 458 && VIM_ISDIGIT(p[1]) | |
| 459 && (p[2] == ':' | |
| 460 || (VIM_ISDIGIT(p[2]) | |
| 461 && (p[3] == ':' | |
| 462 || (VIM_ISDIGIT(p[3]) | |
| 463 && p[4] == ':')))))) | |
| 464 { | |
| 273 | 465 if (*p == NUL || p == mesg) |
|
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466 STRCAT(val, mesg); // 'E123' missing or at beginning |
| 7 | 467 else |
| 468 { | |
|
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469 // '"filename" E123: message text' |
| 7 | 470 if (mesg[0] != '"' || p-2 < &mesg[1] || |
| 471 p[-2] != '"' || p[-1] != ' ') | |
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472 // "E123:" is part of the file name. |
| 7 | 473 continue; |
| 474 | |
| 475 STRCAT(val, p); | |
| 476 p[-2] = NUL; | |
| 477 sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]); | |
| 478 p[-2] = '"'; | |
| 479 } | |
| 480 break; | |
| 481 } | |
| 482 } | |
| 483 } | |
| 484 else | |
| 5517 | 485 { |
| 486 *should_free = FALSE; | |
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487 ret = value; |
| 5517 | 488 } |
| 489 | |
| 490 return ret; | |
| 491 } | |
| 492 | |
| 493 | |
| 494 /* | |
| 495 * Throw a new exception. Return FAIL when out of memory or it was tried to | |
| 496 * throw an illegal user exception. "value" is the exception string for a | |
| 497 * user or interrupt exception, or points to a message list in case of an | |
| 498 * error exception. | |
| 499 */ | |
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500 int |
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501 throw_exception(void *value, except_type_T type, char_u *cmdname) |
| 5517 | 502 { |
| 503 except_T *excp; | |
| 504 int should_free; | |
| 505 | |
| 506 /* | |
| 507 * Disallow faking Interrupt or error exceptions as user exceptions. They | |
| 508 * would be treated differently from real interrupt or error exceptions | |
| 509 * when no active try block is found, see do_cmdline(). | |
| 510 */ | |
| 511 if (type == ET_USER) | |
| 512 { | |
| 513 if (STRNCMP((char_u *)value, "Vim", 3) == 0 | |
| 514 && (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':' | |
| 515 || ((char_u *)value)[3] == '(')) | |
| 516 { | |
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517 emsg(_("E608: Cannot :throw exceptions with 'Vim' prefix")); |
| 5517 | 518 goto fail; |
| 519 } | |
| 520 } | |
| 521 | |
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522 excp = ALLOC_ONE(except_T); |
| 5517 | 523 if (excp == NULL) |
| 524 goto nomem; | |
| 525 | |
| 526 if (type == ET_ERROR) | |
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527 // Store the original message and prefix the exception value with |
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528 // "Vim:" or, if a command name is given, "Vim(cmdname):". |
| 5517 | 529 excp->messages = (struct msglist *)value; |
| 530 | |
| 531 excp->value = get_exception_string(value, type, cmdname, &should_free); | |
| 532 if (excp->value == NULL && should_free) | |
| 533 goto nomem; | |
| 7 | 534 |
| 535 excp->type = type; | |
|
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536 excp->throw_name = estack_sfile(); |
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537 if (excp->throw_name == NULL) |
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538 excp->throw_name = vim_strsave((char_u *)""); |
| 7 | 539 if (excp->throw_name == NULL) |
| 540 { | |
| 5517 | 541 if (should_free) |
| 7 | 542 vim_free(excp->value); |
| 543 goto nomem; | |
| 544 } | |
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changeset
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545 excp->throw_lnum = SOURCING_LNUM; |
| 7 | 546 |
| 547 if (p_verbose >= 13 || debug_break_level > 0) | |
| 548 { | |
| 549 int save_msg_silent = msg_silent; | |
| 550 | |
| 551 if (debug_break_level > 0) | |
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|
552 msg_silent = FALSE; // display messages |
| 293 | 553 else |
| 554 verbose_enter(); | |
| 7 | 555 ++no_wait_return; |
| 293 | 556 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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557 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 558 |
|
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559 smsg(_("Exception thrown: %s"), excp->value); |
|
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changeset
|
560 msg_puts("\n"); // don't overwrite this either |
| 293 | 561 |
| 562 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 563 cmdline_row = msg_row; | |
| 7 | 564 --no_wait_return; |
| 565 if (debug_break_level > 0) | |
| 566 msg_silent = save_msg_silent; | |
| 293 | 567 else |
| 568 verbose_leave(); | |
| 7 | 569 } |
| 570 | |
| 571 current_exception = excp; | |
| 572 return OK; | |
| 573 | |
| 574 nomem: | |
| 575 vim_free(excp); | |
| 576 suppress_errthrow = TRUE; | |
|
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changeset
|
577 emsg(_(e_outofmem)); |
| 7 | 578 fail: |
| 579 current_exception = NULL; | |
| 580 return FAIL; | |
| 581 } | |
| 582 | |
| 583 /* | |
| 584 * Discard an exception. "was_finished" is set when the exception has been | |
| 585 * caught and the catch clause has been ended normally. | |
| 586 */ | |
| 587 static void | |
|
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diff
changeset
|
588 discard_exception(except_T *excp, int was_finished) |
| 7 | 589 { |
| 590 char_u *saved_IObuff; | |
| 591 | |
| 592 if (excp == NULL) | |
| 593 { | |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
594 internal_error("discard_exception()"); |
| 7 | 595 return; |
| 596 } | |
| 597 | |
| 598 if (p_verbose >= 13 || debug_break_level > 0) | |
| 599 { | |
| 600 int save_msg_silent = msg_silent; | |
| 601 | |
| 602 saved_IObuff = vim_strsave(IObuff); | |
| 603 if (debug_break_level > 0) | |
|
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changeset
|
604 msg_silent = FALSE; // display messages |
| 293 | 605 else |
| 606 verbose_enter(); | |
| 7 | 607 ++no_wait_return; |
| 293 | 608 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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changeset
|
609 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 273 | 610 smsg(was_finished |
|
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changeset
|
611 ? _("Exception finished: %s") |
|
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changeset
|
612 : _("Exception discarded: %s"), |
| 7 | 613 excp->value); |
|
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changeset
|
614 msg_puts("\n"); // don't overwrite this either |
| 293 | 615 if (debug_break_level > 0 || *p_vfile == NUL) |
| 616 cmdline_row = msg_row; | |
| 7 | 617 --no_wait_return; |
| 618 if (debug_break_level > 0) | |
| 619 msg_silent = save_msg_silent; | |
| 293 | 620 else |
| 621 verbose_leave(); | |
| 7 | 622 STRCPY(IObuff, saved_IObuff); |
| 623 vim_free(saved_IObuff); | |
| 624 } | |
| 625 if (excp->type != ET_INTERRUPT) | |
| 626 vim_free(excp->value); | |
| 627 if (excp->type == ET_ERROR) | |
| 628 free_msglist(excp->messages); | |
| 629 vim_free(excp->throw_name); | |
| 630 vim_free(excp); | |
| 631 } | |
| 632 | |
| 633 /* | |
| 634 * Discard the exception currently being thrown. | |
| 635 */ | |
| 636 void | |
|
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diff
changeset
|
637 discard_current_exception(void) |
| 7 | 638 { |
|
11645
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patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
639 if (current_exception != NULL) |
|
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patch 8.0.0705: crash when there is an error in a timer callback
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diff
changeset
|
640 { |
|
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patch 8.0.0705: crash when there is an error in a timer callback
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diff
changeset
|
641 discard_exception(current_exception, FALSE); |
|
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patch 8.0.0705: crash when there is an error in a timer callback
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diff
changeset
|
642 current_exception = NULL; |
|
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patch 8.0.0705: crash when there is an error in a timer callback
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diff
changeset
|
643 } |
| 7 | 644 did_throw = FALSE; |
| 645 need_rethrow = FALSE; | |
| 646 } | |
| 647 | |
| 648 /* | |
| 649 * Put an exception on the caught stack. | |
| 650 */ | |
|
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|
651 void |
|
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Christian Brabandt <cb@256bit.org>
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7801
diff
changeset
|
652 catch_exception(except_T *excp) |
| 7 | 653 { |
| 654 excp->caught = caught_stack; | |
| 655 caught_stack = excp; | |
|
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changeset
|
656 set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1); |
| 7 | 657 if (*excp->throw_name != NUL) |
| 658 { | |
| 659 if (excp->throw_lnum != 0) | |
| 273 | 660 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"), |
| 661 excp->throw_name, (long)excp->throw_lnum); | |
| 7 | 662 else |
| 273 | 663 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name); |
| 7 | 664 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 665 } | |
| 666 else | |
|
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changeset
|
667 // throw_name not set on an exception from a command that was typed. |
| 7 | 668 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 669 | |
| 670 if (p_verbose >= 13 || debug_break_level > 0) | |
| 671 { | |
| 672 int save_msg_silent = msg_silent; | |
| 673 | |
| 674 if (debug_break_level > 0) | |
|
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changeset
|
675 msg_silent = FALSE; // display messages |
| 293 | 676 else |
| 677 verbose_enter(); | |
| 7 | 678 ++no_wait_return; |
| 293 | 679 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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changeset
|
680 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 681 |
|
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patch 8.1.0743: giving error messages is not flexible
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changeset
|
682 smsg(_("Exception caught: %s"), excp->value); |
|
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changeset
|
683 msg_puts("\n"); // don't overwrite this either |
| 293 | 684 |
| 685 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 686 cmdline_row = msg_row; | |
| 7 | 687 --no_wait_return; |
| 688 if (debug_break_level > 0) | |
| 689 msg_silent = save_msg_silent; | |
| 293 | 690 else |
| 691 verbose_leave(); | |
| 7 | 692 } |
| 693 } | |
| 694 | |
| 695 /* | |
| 696 * Remove an exception from the caught stack. | |
| 697 */ | |
| 698 static void | |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
699 finish_exception(except_T *excp) |
| 7 | 700 { |
| 701 if (excp != caught_stack) | |
|
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66f1b5bf3fa6
commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
702 internal_error("finish_exception()"); |
| 7 | 703 caught_stack = caught_stack->caught; |
| 704 if (caught_stack != NULL) | |
| 705 { | |
|
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Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
706 set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1); |
| 7 | 707 if (*caught_stack->throw_name != NUL) |
| 708 { | |
| 709 if (caught_stack->throw_lnum != 0) | |
| 273 | 710 vim_snprintf((char *)IObuff, IOSIZE, |
| 7 | 711 _("%s, line %ld"), caught_stack->throw_name, |
| 712 (long)caught_stack->throw_lnum); | |
| 713 else | |
| 273 | 714 vim_snprintf((char *)IObuff, IOSIZE, "%s", |
| 715 caught_stack->throw_name); | |
| 7 | 716 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 717 } | |
| 718 else | |
|
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719 // throw_name not set on an exception from a command that was |
|
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720 // typed. |
| 7 | 721 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 722 } | |
| 723 else | |
| 724 { | |
| 725 set_vim_var_string(VV_EXCEPTION, NULL, -1); | |
| 726 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 727 } | |
| 728 | |
|
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729 // Discard the exception, but use the finish message for 'verbose'. |
| 7 | 730 discard_exception(excp, TRUE); |
| 731 } | |
| 732 | |
| 733 /* | |
| 734 * Flags specifying the message displayed by report_pending. | |
| 735 */ | |
| 736 #define RP_MAKE 0 | |
| 737 #define RP_RESUME 1 | |
| 738 #define RP_DISCARD 2 | |
| 739 | |
| 740 /* | |
| 741 * Report information about something pending in a finally clause if required by | |
| 742 * the 'verbose' option or when debugging. "action" tells whether something is | |
| 743 * made pending or something pending is resumed or discarded. "pending" tells | |
| 744 * what is pending. "value" specifies the return value for a pending ":return" | |
| 745 * or the exception value for a pending exception. | |
| 746 */ | |
| 747 static void | |
|
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748 report_pending(int action, int pending, void *value) |
| 7 | 749 { |
|
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750 char *mesg; |
| 7 | 751 char *s; |
| 752 int save_msg_silent; | |
| 753 | |
| 754 | |
| 755 switch (action) | |
| 756 { | |
| 757 case RP_MAKE: | |
|
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758 mesg = _("%s made pending"); |
| 7 | 759 break; |
| 760 case RP_RESUME: | |
|
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761 mesg = _("%s resumed"); |
| 7 | 762 break; |
|
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763 // case RP_DISCARD: |
| 7 | 764 default: |
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765 mesg = _("%s discarded"); |
| 7 | 766 break; |
| 767 } | |
| 768 | |
| 769 switch (pending) | |
| 770 { | |
| 771 case CSTP_NONE: | |
| 772 return; | |
| 773 | |
| 774 case CSTP_CONTINUE: | |
| 775 s = ":continue"; | |
| 776 break; | |
| 777 case CSTP_BREAK: | |
| 778 s = ":break"; | |
| 779 break; | |
| 780 case CSTP_FINISH: | |
| 781 s = ":finish"; | |
| 782 break; | |
| 783 case CSTP_RETURN: | |
|
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784 // ":return" command producing value, allocated |
| 7 | 785 s = (char *)get_return_cmd(value); |
| 786 break; | |
| 787 | |
| 788 default: | |
| 789 if (pending & CSTP_THROW) | |
| 790 { | |
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791 vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception")); |
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792 mesg = (char *)vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4); |
| 7 | 793 STRCAT(mesg, ": %s"); |
| 794 s = (char *)((except_T *)value)->value; | |
| 795 } | |
| 796 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT)) | |
| 797 s = _("Error and interrupt"); | |
| 798 else if (pending & CSTP_ERROR) | |
| 799 s = _("Error"); | |
|
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800 else // if (pending & CSTP_INTERRUPT) |
| 7 | 801 s = _("Interrupt"); |
| 802 } | |
| 803 | |
| 804 save_msg_silent = msg_silent; | |
| 805 if (debug_break_level > 0) | |
|
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806 msg_silent = FALSE; // display messages |
| 7 | 807 ++no_wait_return; |
|
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808 msg_scroll = TRUE; // always scroll up, don't overwrite |
|
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809 smsg(mesg, s); |
|
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810 msg_puts("\n"); // don't overwrite this either |
| 7 | 811 cmdline_row = msg_row; |
| 812 --no_wait_return; | |
| 813 if (debug_break_level > 0) | |
| 814 msg_silent = save_msg_silent; | |
| 815 | |
| 816 if (pending == CSTP_RETURN) | |
| 817 vim_free(s); | |
| 818 else if (pending & CSTP_THROW) | |
| 819 vim_free(mesg); | |
| 820 } | |
| 821 | |
| 822 /* | |
| 823 * If something is made pending in a finally clause, report it if required by | |
| 824 * the 'verbose' option or when debugging. | |
| 825 */ | |
| 826 void | |
|
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827 report_make_pending(int pending, void *value) |
| 7 | 828 { |
| 829 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 830 { |
| 831 if (debug_break_level <= 0) | |
| 832 verbose_enter(); | |
| 7 | 833 report_pending(RP_MAKE, pending, value); |
| 293 | 834 if (debug_break_level <= 0) |
| 835 verbose_leave(); | |
| 836 } | |
| 7 | 837 } |
| 838 | |
| 839 /* | |
| 840 * If something pending in a finally clause is resumed at the ":endtry", report | |
| 841 * it if required by the 'verbose' option or when debugging. | |
| 842 */ | |
|
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843 static void |
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844 report_resume_pending(int pending, void *value) |
| 7 | 845 { |
| 846 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 847 { |
| 848 if (debug_break_level <= 0) | |
| 849 verbose_enter(); | |
| 7 | 850 report_pending(RP_RESUME, pending, value); |
| 293 | 851 if (debug_break_level <= 0) |
| 852 verbose_leave(); | |
| 853 } | |
| 7 | 854 } |
| 855 | |
| 856 /* | |
| 857 * If something pending in a finally clause is discarded, report it if required | |
| 858 * by the 'verbose' option or when debugging. | |
| 859 */ | |
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860 static void |
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861 report_discard_pending(int pending, void *value) |
| 7 | 862 { |
| 863 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 864 { |
| 865 if (debug_break_level <= 0) | |
| 866 verbose_enter(); | |
| 7 | 867 report_pending(RP_DISCARD, pending, value); |
| 293 | 868 if (debug_break_level <= 0) |
| 869 verbose_leave(); | |
| 870 } | |
| 7 | 871 } |
| 872 | |
| 873 | |
| 874 /* | |
|
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875 * ":eval". |
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876 */ |
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877 void |
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878 ex_eval(exarg_T *eap) |
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879 { |
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880 typval_T tv; |
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881 |
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882 if (eval0(eap->arg, &tv, &eap->nextcmd, !eap->skip) == OK) |
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883 clear_tv(&tv); |
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884 } |
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885 |
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886 /* |
| 7 | 887 * ":if". |
| 888 */ | |
| 889 void | |
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890 ex_if(exarg_T *eap) |
| 7 | 891 { |
| 892 int error; | |
| 893 int skip; | |
| 894 int result; | |
|
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895 cstack_T *cstack = eap->cstack; |
| 7 | 896 |
| 897 if (cstack->cs_idx == CSTACK_LEN - 1) | |
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898 eap->errmsg = N_("E579: :if nesting too deep"); |
| 7 | 899 else |
| 900 { | |
| 901 ++cstack->cs_idx; | |
| 902 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 903 | |
| 904 /* | |
| 905 * Don't do something after an error, interrupt, or throw, or when there | |
| 906 * is a surrounding conditional and it was not active. | |
| 907 */ | |
| 908 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 909 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 910 | |
| 911 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 912 | |
| 913 if (!skip && !error) | |
| 914 { | |
| 915 if (result) | |
| 916 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 917 } | |
| 918 else | |
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919 // set TRUE, so this conditional will never get active |
| 7 | 920 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 921 } | |
| 922 } | |
| 923 | |
| 924 /* | |
| 925 * ":endif". | |
| 926 */ | |
| 927 void | |
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928 ex_endif(exarg_T *eap) |
| 7 | 929 { |
| 930 did_endif = TRUE; | |
| 931 if (eap->cstack->cs_idx < 0 | |
| 79 | 932 || (eap->cstack->cs_flags[eap->cstack->cs_idx] |
| 933 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
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934 eap->errmsg = N_(e_endif_without_if); |
| 7 | 935 else |
| 936 { | |
| 937 /* | |
| 938 * When debugging or a breakpoint was encountered, display the debug | |
| 939 * prompt (if not already done). This shows the user that an ":endif" | |
| 940 * is executed when the ":if" or a previous ":elseif" was not TRUE. | |
| 941 * Handle a ">quit" debug command as if an interrupt had occurred before | |
| 942 * the ":endif". That is, throw an interrupt exception if appropriate. | |
| 943 * Doing this here prevents an exception for a parsing error being | |
| 944 * discarded by throwing the interrupt exception later on. | |
| 945 */ | |
| 359 | 946 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE) |
| 947 && dbg_check_skipped(eap)) | |
| 7 | 948 (void)do_intthrow(eap->cstack); |
| 949 | |
| 950 --eap->cstack->cs_idx; | |
| 951 } | |
| 952 } | |
| 953 | |
| 954 /* | |
| 955 * ":else" and ":elseif". | |
| 956 */ | |
| 957 void | |
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958 ex_else(exarg_T *eap) |
| 7 | 959 { |
| 960 int error; | |
| 961 int skip; | |
| 962 int result; | |
|
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963 cstack_T *cstack = eap->cstack; |
| 7 | 964 |
| 965 /* | |
| 966 * Don't do something after an error, interrupt, or throw, or when there is | |
| 967 * a surrounding conditional and it was not active. | |
| 968 */ | |
| 969 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 970 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 971 | |
| 972 if (cstack->cs_idx < 0 | |
| 75 | 973 || (cstack->cs_flags[cstack->cs_idx] |
| 974 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
| 7 | 975 { |
| 976 if (eap->cmdidx == CMD_else) | |
| 977 { | |
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978 eap->errmsg = N_(e_else_without_if); |
| 7 | 979 return; |
| 980 } | |
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981 eap->errmsg = N_(e_elseif_without_if); |
| 7 | 982 skip = TRUE; |
| 983 } | |
| 984 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) | |
| 985 { | |
| 986 if (eap->cmdidx == CMD_else) | |
| 987 { | |
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988 eap->errmsg = N_("E583: multiple :else"); |
| 7 | 989 return; |
| 990 } | |
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991 eap->errmsg = N_("E584: :elseif after :else"); |
| 7 | 992 skip = TRUE; |
| 993 } | |
| 994 | |
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995 // if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it |
| 7 | 996 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) |
| 997 { | |
| 998 if (eap->errmsg == NULL) | |
| 999 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
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1000 skip = TRUE; // don't evaluate an ":elseif" |
| 7 | 1001 } |
| 1002 else | |
| 1003 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE; | |
| 1004 | |
| 1005 /* | |
| 1006 * When debugging or a breakpoint was encountered, display the debug prompt | |
| 1007 * (if not already done). This shows the user that an ":else" or ":elseif" | |
| 1008 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle | |
| 1009 * a ">quit" debug command as if an interrupt had occurred before the | |
| 1010 * ":else" or ":elseif". That is, set "skip" and throw an interrupt | |
| 1011 * exception if appropriate. Doing this here prevents that an exception | |
| 1012 * for a parsing errors is discarded when throwing the interrupt exception | |
| 1013 * later on. | |
| 1014 */ | |
| 1015 if (!skip && dbg_check_skipped(eap) && got_int) | |
| 1016 { | |
| 1017 (void)do_intthrow(cstack); | |
| 1018 skip = TRUE; | |
| 1019 } | |
| 1020 | |
| 1021 if (eap->cmdidx == CMD_elseif) | |
| 1022 { | |
| 1023 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
|
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1024 // When throwing error exceptions, we want to throw always the first |
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1025 // of several errors in a row. This is what actually happens when |
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1026 // a conditional error was detected above and there is another failure |
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1027 // when parsing the expression. Since the skip flag is set in this |
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1028 // case, the parsing error will be ignored by emsg(). |
| 7 | 1029 |
| 1030 if (!skip && !error) | |
| 1031 { | |
| 1032 if (result) | |
| 1033 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 1034 else | |
| 1035 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 1036 } | |
| 1037 else if (eap->errmsg == NULL) | |
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1038 // set TRUE, so this conditional will never get active |
| 7 | 1039 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 1040 } | |
| 1041 else | |
| 1042 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE; | |
| 1043 } | |
| 1044 | |
| 1045 /* | |
| 75 | 1046 * Handle ":while" and ":for". |
| 7 | 1047 */ |
| 1048 void | |
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1049 ex_while(exarg_T *eap) |
| 7 | 1050 { |
| 1051 int error; | |
| 1052 int skip; | |
| 1053 int result; | |
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1054 cstack_T *cstack = eap->cstack; |
| 7 | 1055 |
| 1056 if (cstack->cs_idx == CSTACK_LEN - 1) | |
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1057 eap->errmsg = N_("E585: :while/:for nesting too deep"); |
| 7 | 1058 else |
| 1059 { | |
| 1060 /* | |
| 75 | 1061 * The loop flag is set when we have jumped back from the matching |
| 1062 * ":endwhile" or ":endfor". When not set, need to initialise this | |
| 1063 * cstack entry. | |
| 7 | 1064 */ |
| 75 | 1065 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) |
| 7 | 1066 { |
| 1067 ++cstack->cs_idx; | |
| 75 | 1068 ++cstack->cs_looplevel; |
| 7 | 1069 cstack->cs_line[cstack->cs_idx] = -1; |
| 1070 } | |
| 75 | 1071 cstack->cs_flags[cstack->cs_idx] = |
| 1072 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR; | |
| 7 | 1073 |
| 1074 /* | |
| 75 | 1075 * Don't do something after an error, interrupt, or throw, or when |
| 1076 * there is a surrounding conditional and it was not active. | |
| 7 | 1077 */ |
| 1078 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1079 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 75 | 1080 if (eap->cmdidx == CMD_while) |
| 1081 { | |
| 1082 /* | |
| 1083 * ":while bool-expr" | |
| 1084 */ | |
| 1085 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 1086 } | |
| 1087 else | |
| 1088 { | |
| 1089 void *fi; | |
| 1090 | |
| 1091 /* | |
| 1092 * ":for var in list-expr" | |
| 1093 */ | |
| 1094 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) | |
| 1095 { | |
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1096 // Jumping here from a ":continue" or ":endfor": use the |
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1097 // previously evaluated list. |
| 79 | 1098 fi = cstack->cs_forinfo[cstack->cs_idx]; |
| 75 | 1099 error = FALSE; |
| 1100 } | |
| 1101 else | |
| 1102 { | |
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1103 // Evaluate the argument and get the info in a structure. |
| 75 | 1104 fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip); |
| 79 | 1105 cstack->cs_forinfo[cstack->cs_idx] = fi; |
| 75 | 1106 } |
| 1107 | |
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1108 // use the element at the start of the list and advance |
| 75 | 1109 if (!error && fi != NULL && !skip) |
| 1110 result = next_for_item(fi, eap->arg); | |
| 1111 else | |
| 1112 result = FALSE; | |
| 1113 | |
| 1114 if (!result) | |
| 1115 { | |
| 1116 free_for_info(fi); | |
| 79 | 1117 cstack->cs_forinfo[cstack->cs_idx] = NULL; |
| 75 | 1118 } |
| 1119 } | |
| 7 | 1120 |
| 1121 /* | |
| 75 | 1122 * If this cstack entry was just initialised and is active, set the |
| 1123 * loop flag, so do_cmdline() will set the line number in cs_line[]. | |
| 1124 * If executing the command a second time, clear the loop flag. | |
| 7 | 1125 */ |
| 1126 if (!skip && !error && result) | |
| 1127 { | |
| 75 | 1128 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE); |
| 1129 cstack->cs_lflags ^= CSL_HAD_LOOP; | |
| 7 | 1130 } |
| 1131 else | |
| 1132 { | |
| 75 | 1133 cstack->cs_lflags &= ~CSL_HAD_LOOP; |
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1134 // If the ":while" evaluates to FALSE or ":for" is past the end of |
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1135 // the list, show the debug prompt at the ":endwhile"/":endfor" as |
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1136 // if there was a ":break" in a ":while"/":for" evaluating to |
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1137 // TRUE. |
| 7 | 1138 if (!skip && !error) |
| 1139 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE; | |
| 1140 } | |
| 1141 } | |
| 1142 } | |
| 1143 | |
| 1144 /* | |
| 1145 * ":continue" | |
| 1146 */ | |
| 1147 void | |
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1148 ex_continue(exarg_T *eap) |
| 7 | 1149 { |
| 1150 int idx; | |
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1151 cstack_T *cstack = eap->cstack; |
| 7 | 1152 |
| 75 | 1153 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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1154 eap->errmsg = N_(e_continue); |
| 7 | 1155 else |
| 1156 { | |
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1157 // Try to find the matching ":while". This might stop at a try |
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1158 // conditional not in its finally clause (which is then to be executed |
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1159 // next). Therefor, inactivate all conditionals except the ":while" |
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1160 // itself (if reached). |
| 75 | 1161 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 840 | 1162 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1163 { |
| 79 | 1164 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 7 | 1165 |
| 1166 /* | |
| 75 | 1167 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the |
| 7 | 1168 * matching ":while". |
| 1169 */ | |
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1170 cstack->cs_lflags |= CSL_HAD_CONT; // let do_cmdline() handle it |
| 7 | 1171 } |
| 1172 else | |
| 1173 { | |
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1174 // If a try conditional not in its finally clause is reached first, |
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1175 // make the ":continue" pending for execution at the ":endtry". |
| 7 | 1176 cstack->cs_pending[idx] = CSTP_CONTINUE; |
| 1177 report_make_pending(CSTP_CONTINUE, NULL); | |
| 1178 } | |
| 1179 } | |
| 1180 } | |
| 1181 | |
| 1182 /* | |
| 1183 * ":break" | |
| 1184 */ | |
| 1185 void | |
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1186 ex_break(exarg_T *eap) |
| 7 | 1187 { |
| 1188 int idx; | |
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1189 cstack_T *cstack = eap->cstack; |
| 7 | 1190 |
| 75 | 1191 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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1192 eap->errmsg = N_(e_break); |
| 7 | 1193 else |
| 1194 { | |
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1195 // Inactivate conditionals until the matching ":while" or a try |
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1196 // conditional not in its finally clause (which is then to be |
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1197 // executed next) is found. In the latter case, make the ":break" |
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1198 // pending for execution at the ":endtry". |
| 75 | 1199 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE); |
| 840 | 1200 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1201 { |
| 1202 cstack->cs_pending[idx] = CSTP_BREAK; | |
| 1203 report_make_pending(CSTP_BREAK, NULL); | |
| 1204 } | |
| 1205 } | |
| 1206 } | |
| 1207 | |
| 1208 /* | |
| 75 | 1209 * ":endwhile" and ":endfor" |
| 7 | 1210 */ |
| 1211 void | |
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1212 ex_endwhile(exarg_T *eap) |
| 7 | 1213 { |
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1214 cstack_T *cstack = eap->cstack; |
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1215 int idx; |
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1216 char *err; |
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1217 int csf; |
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1218 int fl; |
| 7 | 1219 |
| 75 | 1220 if (eap->cmdidx == CMD_endwhile) |
| 1221 { | |
| 1222 err = e_while; | |
| 1223 csf = CSF_WHILE; | |
| 1224 } | |
| 1225 else | |
| 1226 { | |
| 1227 err = e_for; | |
| 1228 csf = CSF_FOR; | |
| 1229 } | |
| 1230 | |
| 1231 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) | |
| 1232 eap->errmsg = err; | |
| 7 | 1233 else |
| 1234 { | |
| 75 | 1235 fl = cstack->cs_flags[cstack->cs_idx]; |
| 1236 if (!(fl & csf)) | |
| 7 | 1237 { |
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1238 // If we are in a ":while" or ":for" but used the wrong endloop |
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1239 // command, do not rewind to the next enclosing ":for"/":while". |
| 75 | 1240 if (fl & CSF_WHILE) |
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1241 eap->errmsg = _("E732: Using :endfor with :while"); |
| 75 | 1242 else if (fl & CSF_FOR) |
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1243 eap->errmsg = _("E733: Using :endwhile with :for"); |
| 114 | 1244 } |
| 1245 if (!(fl & (CSF_WHILE | CSF_FOR))) | |
| 1246 { | |
| 1247 if (!(fl & CSF_TRY)) | |
| 75 | 1248 eap->errmsg = e_endif; |
| 1249 else if (fl & CSF_FINALLY) | |
| 1250 eap->errmsg = e_endtry; | |
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1251 // Try to find the matching ":while" and report what's missing. |
| 7 | 1252 for (idx = cstack->cs_idx; idx > 0; --idx) |
| 1253 { | |
| 75 | 1254 fl = cstack->cs_flags[idx]; |
| 1255 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) | |
| 7 | 1256 { |
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1257 // Give up at a try conditional not in its finally clause. |
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1258 // Ignore the ":endwhile"/":endfor". |
| 75 | 1259 eap->errmsg = err; |
| 7 | 1260 return; |
| 1261 } | |
| 75 | 1262 if (fl & csf) |
| 7 | 1263 break; |
| 1264 } | |
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1265 // Cleanup and rewind all contained (and unclosed) conditionals. |
| 75 | 1266 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 7 | 1267 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 1268 } | |
| 1269 | |
| 1270 /* | |
| 1271 * When debugging or a breakpoint was encountered, display the debug | |
| 1272 * prompt (if not already done). This shows the user that an | |
| 75 | 1273 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or |
| 1274 * after a ":break". Handle a ">quit" debug command as if an | |
| 1275 * interrupt had occurred before the ":endwhile"/":endfor". That is, | |
| 1276 * throw an interrupt exception if appropriate. Doing this here | |
| 1277 * prevents that an exception for a parsing error is discarded when | |
| 1278 * throwing the interrupt exception later on. | |
| 7 | 1279 */ |
| 1280 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE | |
| 1281 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE) | |
| 1282 && dbg_check_skipped(eap)) | |
| 1283 (void)do_intthrow(cstack); | |
| 1284 | |
| 1285 /* | |
| 75 | 1286 * Set loop flag, so do_cmdline() will jump back to the matching |
| 1287 * ":while" or ":for". | |
| 7 | 1288 */ |
| 75 | 1289 cstack->cs_lflags |= CSL_HAD_ENDLOOP; |
| 7 | 1290 } |
| 1291 } | |
| 1292 | |
| 1293 | |
| 1294 /* | |
| 1295 * ":throw expr" | |
| 1296 */ | |
| 1297 void | |
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1298 ex_throw(exarg_T *eap) |
| 7 | 1299 { |
| 1300 char_u *arg = eap->arg; | |
| 1301 char_u *value; | |
| 1302 | |
| 1303 if (*arg != NUL && *arg != '|' && *arg != '\n') | |
| 1304 value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip); | |
| 1305 else | |
| 1306 { | |
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1307 emsg(_(e_argreq)); |
| 7 | 1308 value = NULL; |
| 1309 } | |
| 1310 | |
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1311 // On error or when an exception is thrown during argument evaluation, do |
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1312 // not throw. |
| 7 | 1313 if (!eap->skip && value != NULL) |
| 1314 { | |
| 1315 if (throw_exception(value, ET_USER, NULL) == FAIL) | |
| 1316 vim_free(value); | |
| 1317 else | |
| 1318 do_throw(eap->cstack); | |
| 1319 } | |
| 1320 } | |
| 1321 | |
| 1322 /* | |
| 21 | 1323 * Throw the current exception through the specified cstack. Common routine |
| 1324 * for ":throw" (user exception) and error and interrupt exceptions. Also | |
| 1325 * used for rethrowing an uncaught exception. | |
| 7 | 1326 */ |
| 1327 void | |
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1328 do_throw(cstack_T *cstack) |
| 7 | 1329 { |
| 1330 int idx; | |
| 1331 int inactivate_try = FALSE; | |
| 1332 | |
| 1333 /* | |
| 1334 * Cleanup and inactivate up to the next surrounding try conditional that | |
| 1335 * is not in its finally clause. Normally, do not inactivate the try | |
| 1336 * conditional itself, so that its ACTIVE flag can be tested below. But | |
| 1337 * if a previous error or interrupt has not been converted to an exception, | |
| 1338 * inactivate the try conditional, too, as if the conversion had been done, | |
| 21 | 1339 * and reset the did_emsg or got_int flag, so this won't happen again at |
| 1340 * the next surrounding try conditional. | |
| 7 | 1341 */ |
| 1880 | 1342 #ifndef THROW_ON_ERROR_TRUE |
| 7 | 1343 if (did_emsg && !THROW_ON_ERROR) |
| 1344 { | |
| 1345 inactivate_try = TRUE; | |
| 1346 did_emsg = FALSE; | |
| 1347 } | |
| 1880 | 1348 #endif |
| 1349 #ifndef THROW_ON_INTERRUPT_TRUE | |
| 7 | 1350 if (got_int && !THROW_ON_INTERRUPT) |
| 1351 { | |
| 1352 inactivate_try = TRUE; | |
| 1353 got_int = FALSE; | |
| 1354 } | |
| 1880 | 1355 #endif |
| 7 | 1356 idx = cleanup_conditionals(cstack, 0, inactivate_try); |
| 1357 if (idx >= 0) | |
| 1358 { | |
| 1359 /* | |
| 1360 * If this try conditional is active and we are before its first | |
| 21 | 1361 * ":catch", set THROWN so that the ":catch" commands will check |
| 1362 * whether the exception matches. When the exception came from any of | |
| 1363 * the catch clauses, it will be made pending at the ":finally" (if | |
| 1364 * present) and rethrown at the ":endtry". This will also happen if | |
| 1365 * the try conditional is inactive. This is the case when we are | |
| 1366 * throwing an exception due to an error or interrupt on the way from | |
| 1367 * a preceding ":continue", ":break", ":return", ":finish", error or | |
| 1368 * interrupt (not converted to an exception) to the finally clause or | |
| 1369 * from a preceding throw of a user or error or interrupt exception to | |
| 1370 * the matching catch clause or the finally clause. | |
| 7 | 1371 */ |
| 1372 if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1373 { | |
| 1374 if (cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 1375 cstack->cs_flags[idx] |= CSF_THROWN; | |
| 1376 else | |
|
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1377 // THROWN may have already been set for a catchable exception |
|
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1378 // that has been discarded. Ensure it is reset for the new |
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1379 // exception. |
| 7 | 1380 cstack->cs_flags[idx] &= ~CSF_THROWN; |
| 1381 } | |
| 1382 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 1383 cstack->cs_exception[idx] = current_exception; | |
| 1384 } | |
| 1385 #if 0 | |
|
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1386 // TODO: Add optimization below. Not yet done because of interface |
|
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|
1387 // problems to eval.c and ex_cmds2.c. (Servatius) |
| 7 | 1388 else |
| 1389 { | |
| 1390 /* | |
| 1391 * There are no catch clauses to check or finally clauses to execute. | |
| 1392 * End the current script or function. The exception will be rethrown | |
| 1393 * in the caller. | |
| 1394 */ | |
| 1395 if (getline_equal(eap->getline, eap->cookie, get_func_line)) | |
| 1396 current_funccal->returned = TRUE; | |
| 1397 elseif (eap->get_func_line == getsourceline) | |
| 1398 ((struct source_cookie *)eap->cookie)->finished = TRUE; | |
| 1399 } | |
| 1400 #endif | |
| 1401 | |
| 1402 did_throw = TRUE; | |
| 1403 } | |
| 1404 | |
| 1405 /* | |
| 1406 * ":try" | |
| 1407 */ | |
| 1408 void | |
|
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|
1409 ex_try(exarg_T *eap) |
| 7 | 1410 { |
| 1411 int skip; | |
|
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1412 cstack_T *cstack = eap->cstack; |
| 7 | 1413 |
| 1414 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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1415 eap->errmsg = N_("E601: :try nesting too deep"); |
| 7 | 1416 else |
| 1417 { | |
| 1418 ++cstack->cs_idx; | |
| 1419 ++cstack->cs_trylevel; | |
| 1420 cstack->cs_flags[cstack->cs_idx] = CSF_TRY; | |
| 1421 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE; | |
| 1422 | |
| 1423 /* | |
| 1424 * Don't do something after an error, interrupt, or throw, or when there | |
| 1425 * is a surrounding conditional and it was not active. | |
| 1426 */ | |
| 1427 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1428 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1429 | |
| 1430 if (!skip) | |
| 1431 { | |
|
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1432 // Set ACTIVE and TRUE. TRUE means that the corresponding ":catch" |
|
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1433 // commands should check for a match if an exception is thrown and |
|
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|
1434 // that the finally clause needs to be executed. |
| 7 | 1435 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE; |
| 1436 | |
| 1437 /* | |
| 1438 * ":silent!", even when used in a try conditional, disables | |
| 1439 * displaying of error messages and conversion of errors to | |
| 1440 * exceptions. When the silent commands again open a try | |
| 1441 * conditional, save "emsg_silent" and reset it so that errors are | |
| 1442 * again converted to exceptions. The value is restored when that | |
| 1443 * try conditional is left. If it is left normally, the commands | |
| 1444 * following the ":endtry" are again silent. If it is left by | |
| 1445 * a ":continue", ":break", ":return", or ":finish", the commands | |
| 1446 * executed next are again silent. If it is left due to an | |
| 1447 * aborting error, an interrupt, or an exception, restoring | |
| 1448 * "emsg_silent" does not matter since we are already in the | |
| 1449 * aborting state and/or the exception has already been thrown. | |
| 1450 * The effect is then just freeing the memory that was allocated | |
| 1451 * to save the value. | |
| 1452 */ | |
| 1453 if (emsg_silent) | |
| 1454 { | |
| 1455 eslist_T *elem; | |
| 1456 | |
|
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1457 elem = ALLOC_ONE(struct eslist_elem); |
| 7 | 1458 if (elem == NULL) |
|
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1459 emsg(_(e_outofmem)); |
| 7 | 1460 else |
| 1461 { | |
| 1462 elem->saved_emsg_silent = emsg_silent; | |
| 1463 elem->next = cstack->cs_emsg_silent_list; | |
| 1464 cstack->cs_emsg_silent_list = elem; | |
| 1465 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT; | |
| 1466 emsg_silent = 0; | |
| 1467 } | |
| 1468 } | |
| 1469 } | |
| 1470 | |
| 1471 } | |
| 1472 } | |
| 1473 | |
| 1474 /* | |
| 1475 * ":catch /{pattern}/" and ":catch" | |
| 1476 */ | |
| 1477 void | |
|
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|
1478 ex_catch(exarg_T *eap) |
| 7 | 1479 { |
| 1480 int idx = 0; | |
| 1481 int give_up = FALSE; | |
| 1482 int skip = FALSE; | |
| 1483 int caught = FALSE; | |
| 1484 char_u *end; | |
| 1485 int save_char = 0; | |
| 1486 char_u *save_cpo; | |
| 1487 regmatch_T regmatch; | |
| 1488 int prev_got_int; | |
|
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1489 cstack_T *cstack = eap->cstack; |
| 7 | 1490 char_u *pat; |
| 1491 | |
| 1492 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1493 { | |
|
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1494 eap->errmsg = e_catch; |
| 7 | 1495 give_up = TRUE; |
| 1496 } | |
| 1497 else | |
| 1498 { | |
| 1499 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1500 { | |
|
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1501 // Report what's missing if the matching ":try" is not in its |
|
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|
1502 // finally clause. |
| 75 | 1503 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1504 skip = TRUE; |
| 1505 } | |
| 1506 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1507 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1508 break; | |
| 1509 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1510 { | |
|
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1511 // Give up for a ":catch" after ":finally" and ignore it. |
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1512 // Just parse. |
|
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|
1513 eap->errmsg = N_("E604: :catch after :finally"); |
| 7 | 1514 give_up = TRUE; |
| 1515 } | |
| 79 | 1516 else |
| 75 | 1517 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1518 &cstack->cs_looplevel); | |
| 7 | 1519 } |
| 1520 | |
|
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1521 if (ends_excmd(*eap->arg)) // no argument, catch all errors |
| 7 | 1522 { |
| 1523 pat = (char_u *)".*"; | |
| 1524 end = NULL; | |
| 1525 eap->nextcmd = find_nextcmd(eap->arg); | |
| 1526 } | |
| 1527 else | |
| 1528 { | |
| 1529 pat = eap->arg + 1; | |
| 1530 end = skip_regexp(pat, *eap->arg, TRUE, NULL); | |
| 1531 } | |
| 1532 | |
| 1533 if (!give_up) | |
| 1534 { | |
| 1535 /* | |
| 1536 * Don't do something when no exception has been thrown or when the | |
| 1537 * corresponding try block never got active (because of an inactive | |
| 1538 * surrounding conditional or after an error or interrupt or throw). | |
| 1539 */ | |
| 1540 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE)) | |
| 1541 skip = TRUE; | |
| 1542 | |
| 1543 /* | |
| 1544 * Check for a match only if an exception is thrown but not caught by | |
| 1545 * a previous ":catch". An exception that has replaced a discarded | |
| 1546 * exception is not checked (THROWN is not set then). | |
| 1547 */ | |
| 1548 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN) | |
| 1549 && !(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1550 { | |
| 1551 if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1))) | |
| 1552 { | |
|
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1553 emsg(_(e_trailing)); |
| 7 | 1554 return; |
| 1555 } | |
| 1556 | |
|
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1557 // When debugging or a breakpoint was encountered, display the |
|
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1558 // debug prompt (if not already done) before checking for a match. |
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1559 // This is a helpful hint for the user when the regular expression |
|
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1560 // matching fails. Handle a ">quit" debug command as if an |
|
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1561 // interrupt had occurred before the ":catch". That is, discard |
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1562 // the original exception, replace it by an interrupt exception, |
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1563 // and don't catch it in this try block. |
| 7 | 1564 if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) |
| 1565 { | |
|
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1566 // Terminate the pattern and avoid the 'l' flag in 'cpoptions' |
|
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|
1567 // while compiling it. |
| 7 | 1568 if (end != NULL) |
| 1569 { | |
| 1570 save_char = *end; | |
| 1571 *end = NUL; | |
| 1572 } | |
| 1573 save_cpo = p_cpo; | |
| 1574 p_cpo = (char_u *)""; | |
|
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1575 // Disable error messages, it will make current_exception |
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1576 // invalid. |
|
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|
1577 ++emsg_off; |
| 1333 | 1578 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); |
|
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|
1579 --emsg_off; |
| 7 | 1580 regmatch.rm_ic = FALSE; |
| 1581 if (end != NULL) | |
| 1582 *end = save_char; | |
| 1583 p_cpo = save_cpo; | |
| 1584 if (regmatch.regprog == NULL) | |
|
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|
1585 semsg(_(e_invarg2), pat); |
| 7 | 1586 else |
| 1587 { | |
| 1588 /* | |
| 1589 * Save the value of got_int and reset it. We don't want | |
| 1590 * a previous interruption cancel matching, only hitting | |
| 1591 * CTRL-C while matching should abort it. | |
| 1592 */ | |
| 1593 prev_got_int = got_int; | |
| 1594 got_int = FALSE; | |
|
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1595 caught = vim_regexec_nl(®match, |
|
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1596 (char_u *)current_exception->value, (colnr_T)0); |
| 7 | 1597 got_int |= prev_got_int; |
|
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|
1598 vim_regfree(regmatch.regprog); |
| 7 | 1599 } |
| 1600 } | |
| 1601 } | |
| 1602 | |
| 1603 if (caught) | |
| 1604 { | |
|
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1605 // Make this ":catch" clause active and reset did_emsg, got_int, |
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1606 // and did_throw. Put the exception on the caught stack. |
| 7 | 1607 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT; |
| 1608 did_emsg = got_int = did_throw = FALSE; | |
| 1609 catch_exception((except_T *)cstack->cs_exception[idx]); | |
|
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1610 // It's mandatory that the current exception is stored in the cstack |
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1611 // so that it can be discarded at the next ":catch", ":finally", or |
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1612 // ":endtry" or when the catch clause is left by a ":continue", |
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1613 // ":break", ":return", ":finish", error, interrupt, or another |
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1614 // exception. |
| 7 | 1615 if (cstack->cs_exception[cstack->cs_idx] != current_exception) |
|
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|
1616 internal_error("ex_catch()"); |
| 7 | 1617 } |
| 1618 else | |
| 1619 { | |
| 1620 /* | |
| 1621 * If there is a preceding catch clause and it caught the exception, | |
| 1622 * finish the exception now. This happens also after errors except | |
| 1623 * when this ":catch" was after the ":finally" or not within | |
| 1624 * a ":try". Make the try conditional inactive so that the | |
| 1625 * following catch clauses are skipped. On an error or interrupt | |
| 1626 * after the preceding try block or catch clause was left by | |
| 1627 * a ":continue", ":break", ":return", or ":finish", discard the | |
| 1628 * pending action. | |
| 1629 */ | |
| 1630 cleanup_conditionals(cstack, CSF_TRY, TRUE); | |
| 1631 } | |
| 1632 } | |
| 1633 | |
| 1634 if (end != NULL) | |
| 1635 eap->nextcmd = find_nextcmd(end); | |
| 1636 } | |
| 1637 | |
| 1638 /* | |
| 1639 * ":finally" | |
| 1640 */ | |
| 1641 void | |
|
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|
1642 ex_finally(exarg_T *eap) |
| 7 | 1643 { |
| 1644 int idx; | |
| 1645 int skip = FALSE; | |
| 1646 int pending = CSTP_NONE; | |
|
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1647 cstack_T *cstack = eap->cstack; |
| 7 | 1648 |
| 1649 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1650 eap->errmsg = e_finally; |
| 7 | 1651 else |
| 1652 { | |
| 1653 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1654 { | |
| 75 | 1655 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1656 for (idx = cstack->cs_idx - 1; idx > 0; --idx) |
| 1657 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1658 break; | |
|
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1659 // Make this error pending, so that the commands in the following |
|
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1660 // finally clause can be executed. This overrules also a pending |
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|
1661 // ":continue", ":break", ":return", or ":finish". |
| 7 | 1662 pending = CSTP_ERROR; |
| 1663 } | |
| 1664 else | |
| 1665 idx = cstack->cs_idx; | |
| 1666 | |
| 1667 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1668 { | |
|
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1669 // Give up for a multiple ":finally" and ignore it. |
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1670 eap->errmsg = e_finally_dup; |
| 7 | 1671 return; |
| 1672 } | |
| 79 | 1673 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 75 | 1674 &cstack->cs_looplevel); |
| 7 | 1675 |
| 1676 /* | |
| 1677 * Don't do something when the corresponding try block never got active | |
| 1678 * (because of an inactive surrounding conditional or after an error or | |
| 1679 * interrupt or throw) or for a ":finally" without ":try" or a multiple | |
| 1680 * ":finally". After every other error (did_emsg or the conditional | |
| 1681 * errors detected above) or after an interrupt (got_int) or an | |
| 1682 * exception (did_throw), the finally clause must be executed. | |
| 1683 */ | |
| 1684 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1685 | |
| 1686 if (!skip) | |
| 1687 { | |
|
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1688 // When debugging or a breakpoint was encountered, display the |
|
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1689 // debug prompt (if not already done). The user then knows that the |
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1690 // finally clause is executed. |
| 7 | 1691 if (dbg_check_skipped(eap)) |
| 1692 { | |
|
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1693 // Handle a ">quit" debug command as if an interrupt had |
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1694 // occurred before the ":finally". That is, discard the |
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1695 // original exception and replace it by an interrupt |
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1696 // exception. |
| 7 | 1697 (void)do_intthrow(cstack); |
| 1698 } | |
| 1699 | |
| 1700 /* | |
| 1701 * If there is a preceding catch clause and it caught the exception, | |
| 1702 * finish the exception now. This happens also after errors except | |
| 1703 * when this is a multiple ":finally" or one not within a ":try". | |
| 1704 * After an error or interrupt, this also discards a pending | |
| 1705 * ":continue", ":break", ":finish", or ":return" from the preceding | |
| 1706 * try block or catch clause. | |
| 1707 */ | |
| 1708 cleanup_conditionals(cstack, CSF_TRY, FALSE); | |
| 1709 | |
| 1710 /* | |
| 1711 * Make did_emsg, got_int, did_throw pending. If set, they overrule | |
| 1712 * a pending ":continue", ":break", ":return", or ":finish". Then | |
| 1713 * we have particularly to discard a pending return value (as done | |
| 1714 * by the call to cleanup_conditionals() above when did_emsg or | |
| 1715 * got_int is set). The pending values are restored by the | |
| 1716 * ":endtry", except if there is a new error, interrupt, exception, | |
| 1717 * ":continue", ":break", ":return", or ":finish" in the following | |
| 75 | 1718 * finally clause. A missing ":endwhile", ":endfor" or ":endif" |
| 1719 * detected here is treated as if did_emsg and did_throw had | |
| 1720 * already been set, respectively in case that the error is not | |
| 1721 * converted to an exception, did_throw had already been unset. | |
| 1722 * We must not set did_emsg here since that would suppress the | |
| 1723 * error message. | |
| 7 | 1724 */ |
| 1725 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) | |
| 1726 { | |
| 1727 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) | |
| 1728 { | |
| 1729 report_discard_pending(CSTP_RETURN, | |
| 68 | 1730 cstack->cs_rettv[cstack->cs_idx]); |
| 1731 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]); | |
| 7 | 1732 } |
| 1733 if (pending == CSTP_ERROR && !did_emsg) | |
| 1734 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0; | |
| 1735 else | |
| 1736 pending |= did_throw ? CSTP_THROW : 0; | |
| 1737 pending |= did_emsg ? CSTP_ERROR : 0; | |
| 1738 pending |= got_int ? CSTP_INTERRUPT : 0; | |
| 1739 cstack->cs_pending[cstack->cs_idx] = pending; | |
| 1740 | |
|
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1741 // It's mandatory that the current exception is stored in the |
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1742 // cstack so that it can be rethrown at the ":endtry" or be |
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1743 // discarded if the finally clause is left by a ":continue", |
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1744 // ":break", ":return", ":finish", error, interrupt, or another |
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1745 // exception. When emsg() is called for a missing ":endif" or |
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1746 // a missing ":endwhile"/":endfor" detected here, the |
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1747 // exception will be discarded. |
| 79 | 1748 if (did_throw && cstack->cs_exception[cstack->cs_idx] |
| 1749 != current_exception) | |
|
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1750 internal_error("ex_finally()"); |
| 7 | 1751 } |
| 1752 | |
| 1753 /* | |
| 75 | 1754 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg, |
| 22 | 1755 * got_int, and did_throw and make the finally clause active. |
| 1756 * This will happen after emsg() has been called for a missing | |
| 75 | 1757 * ":endif" or a missing ":endwhile"/":endfor" detected here, so |
| 1758 * that the following finally clause will be executed even then. | |
| 7 | 1759 */ |
| 75 | 1760 cstack->cs_lflags |= CSL_HAD_FINA; |
| 7 | 1761 } |
| 1762 } | |
| 1763 } | |
| 1764 | |
| 1765 /* | |
| 1766 * ":endtry" | |
| 1767 */ | |
| 1768 void | |
|
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1769 ex_endtry(exarg_T *eap) |
| 7 | 1770 { |
| 1771 int idx; | |
| 1772 int skip; | |
| 1773 int rethrow = FALSE; | |
| 1774 int pending = CSTP_NONE; | |
| 68 | 1775 void *rettv = NULL; |
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1776 cstack_T *cstack = eap->cstack; |
| 7 | 1777 |
| 1778 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
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1779 eap->errmsg = e_no_endtry; |
| 7 | 1780 else |
| 1781 { | |
| 1782 /* | |
| 1783 * Don't do something after an error, interrupt or throw in the try | |
| 1784 * block, catch clause, or finally clause preceding this ":endtry" or | |
| 1785 * when an error or interrupt occurred after a ":continue", ":break", | |
| 1786 * ":return", or ":finish" in a try block or catch clause preceding this | |
| 1787 * ":endtry" or when the try block never got active (because of an | |
| 1788 * inactive surrounding conditional or after an error or interrupt or | |
| 1789 * throw) or when there is a surrounding conditional and it has been | |
| 1790 * made inactive by a ":continue", ":break", ":return", or ":finish" in | |
| 1791 * the finally clause. The latter case need not be tested since then | |
| 1792 * anything pending has already been discarded. */ | |
| 1793 skip = did_emsg || got_int || did_throw || | |
| 1794 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1795 | |
| 1796 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1797 { | |
| 75 | 1798 eap->errmsg = get_end_emsg(cstack); |
|
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1799 // Find the matching ":try" and report what's missing. |
| 7 | 1800 idx = cstack->cs_idx; |
| 1801 do | |
| 1802 --idx; | |
| 1803 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY)); | |
| 75 | 1804 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1805 &cstack->cs_looplevel); | |
| 7 | 1806 skip = TRUE; |
| 1807 | |
| 1808 /* | |
| 1809 * If an exception is being thrown, discard it to prevent it from | |
| 1810 * being rethrown at the end of this function. It would be | |
| 1811 * discarded by the error message, anyway. Resets did_throw. | |
| 1812 * This does not affect the script termination due to the error | |
| 1813 * since "trylevel" is decremented after emsg() has been called. | |
| 1814 */ | |
| 1815 if (did_throw) | |
| 1816 discard_current_exception(); | |
| 1817 } | |
| 1818 else | |
| 1819 { | |
| 1820 idx = cstack->cs_idx; | |
| 1821 | |
| 1822 /* | |
| 1823 * If we stopped with the exception currently being thrown at this | |
| 1824 * try conditional since we didn't know that it doesn't have | |
| 1825 * a finally clause, we need to rethrow it after closing the try | |
| 1826 * conditional. | |
| 1827 */ | |
| 1828 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE) | |
| 1829 && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1830 rethrow = TRUE; | |
| 1831 } | |
| 1832 | |
|
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1833 // If there was no finally clause, show the user when debugging or |
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1834 // a breakpoint was encountered that the end of the try conditional has |
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1835 // been reached: display the debug prompt (if not already done). Do |
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1836 // this on normal control flow or when an exception was thrown, but not |
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1837 // on an interrupt or error not converted to an exception or when |
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1838 // a ":break", ":continue", ":return", or ":finish" is pending. These |
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1839 // actions are carried out immediately. |
| 7 | 1840 if ((rethrow || (!skip |
| 1841 && !(cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1842 && !cstack->cs_pending[idx])) | |
| 1843 && dbg_check_skipped(eap)) | |
| 1844 { | |
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1845 // Handle a ">quit" debug command as if an interrupt had occurred |
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1846 // before the ":endtry". That is, throw an interrupt exception and |
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1847 // set "skip" and "rethrow". |
| 7 | 1848 if (got_int) |
| 1849 { | |
| 1850 skip = TRUE; | |
| 1851 (void)do_intthrow(cstack); | |
|
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1852 // The do_intthrow() call may have reset did_throw or |
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1853 // cstack->cs_pending[idx]. |
| 7 | 1854 rethrow = FALSE; |
| 1855 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1856 rethrow = TRUE; | |
| 1857 } | |
| 1858 } | |
| 1859 | |
| 1860 /* | |
| 1861 * If a ":return" is pending, we need to resume it after closing the | |
| 1862 * try conditional; remember the return value. If there was a finally | |
| 1863 * clause making an exception pending, we need to rethrow it. Make it | |
| 1864 * the exception currently being thrown. | |
| 1865 */ | |
| 1866 if (!skip) | |
| 1867 { | |
| 1868 pending = cstack->cs_pending[idx]; | |
| 1869 cstack->cs_pending[idx] = CSTP_NONE; | |
| 1870 if (pending == CSTP_RETURN) | |
| 68 | 1871 rettv = cstack->cs_rettv[idx]; |
| 7 | 1872 else if (pending & CSTP_THROW) |
| 1873 current_exception = cstack->cs_exception[idx]; | |
| 1874 } | |
| 1875 | |
| 1876 /* | |
| 1877 * Discard anything pending on an error, interrupt, or throw in the | |
| 1878 * finally clause. If there was no ":finally", discard a pending | |
| 1879 * ":continue", ":break", ":return", or ":finish" if an error or | |
| 1880 * interrupt occurred afterwards, but before the ":endtry" was reached. | |
| 1881 * If an exception was caught by the last of the catch clauses and there | |
| 1882 * was no finally clause, finish the exception now. This happens also | |
| 1883 * after errors except when this ":endtry" is not within a ":try". | |
| 1884 * Restore "emsg_silent" if it has been reset by this try conditional. | |
| 1885 */ | |
| 840 | 1886 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE); |
| 7 | 1887 |
| 1888 --cstack->cs_idx; | |
| 1889 --cstack->cs_trylevel; | |
| 1890 | |
| 1891 if (!skip) | |
| 1892 { | |
| 1893 report_resume_pending(pending, | |
| 68 | 1894 (pending == CSTP_RETURN) ? rettv : |
| 7 | 1895 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 1896 switch (pending) | |
| 1897 { | |
| 1898 case CSTP_NONE: | |
| 1899 break; | |
| 1900 | |
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1901 // Reactivate a pending ":continue", ":break", ":return", |
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1902 // ":finish" from the try block or a catch clause of this try |
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1903 // conditional. This is skipped, if there was an error in an |
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1904 // (unskipped) conditional command or an interrupt afterwards |
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1905 // or if the finally clause is present and executed a new error, |
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1906 // interrupt, throw, ":continue", ":break", ":return", or |
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1907 // ":finish". |
| 7 | 1908 case CSTP_CONTINUE: |
| 1909 ex_continue(eap); | |
| 1910 break; | |
| 1911 case CSTP_BREAK: | |
| 1912 ex_break(eap); | |
| 1913 break; | |
| 1914 case CSTP_RETURN: | |
| 68 | 1915 do_return(eap, FALSE, FALSE, rettv); |
| 7 | 1916 break; |
| 1917 case CSTP_FINISH: | |
| 1918 do_finish(eap, FALSE); | |
| 1919 break; | |
| 1920 | |
|
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1921 // When the finally clause was entered due to an error, |
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1922 // interrupt or throw (as opposed to a ":continue", ":break", |
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1923 // ":return", or ":finish"), restore the pending values of |
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1924 // did_emsg, got_int, and did_throw. This is skipped, if there |
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1925 // was a new error, interrupt, throw, ":continue", ":break", |
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1926 // ":return", or ":finish". in the finally clause. |
| 7 | 1927 default: |
| 1928 if (pending & CSTP_ERROR) | |
| 1929 did_emsg = TRUE; | |
| 1930 if (pending & CSTP_INTERRUPT) | |
| 1931 got_int = TRUE; | |
| 1932 if (pending & CSTP_THROW) | |
| 1933 rethrow = TRUE; | |
| 1934 break; | |
| 1935 } | |
| 1936 } | |
| 1937 | |
| 1938 if (rethrow) | |
|
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1939 // Rethrow the current exception (within this cstack). |
| 7 | 1940 do_throw(cstack); |
| 1941 } | |
| 1942 } | |
| 1943 | |
| 1944 /* | |
| 36 | 1945 * enter_cleanup() and leave_cleanup() |
| 1946 * | |
| 1947 * Functions to be called before/after invoking a sequence of autocommands for | |
| 1948 * cleanup for a failed command. (Failure means here that a call to emsg() | |
| 1949 * has been made, an interrupt occurred, or there is an uncaught exception | |
| 1950 * from a previous autocommand execution of the same command.) | |
| 24 | 1951 * |
| 36 | 1952 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same |
| 1953 * pointer to leave_cleanup(). The cleanup_T structure stores the pending | |
| 1954 * error/interrupt/exception state. | |
| 1955 */ | |
| 1956 | |
| 1957 /* | |
| 1958 * This function works a bit like ex_finally() except that there was not | |
| 1959 * actually an extra try block around the part that failed and an error or | |
| 1960 * interrupt has not (yet) been converted to an exception. This function | |
| 1961 * saves the error/interrupt/ exception state and prepares for the call to | |
| 1962 * do_cmdline() that is going to be made for the cleanup autocommand | |
| 1963 * execution. | |
| 24 | 1964 */ |
| 1965 void | |
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1966 enter_cleanup(cleanup_T *csp) |
| 24 | 1967 { |
| 1968 int pending = CSTP_NONE; | |
| 1969 | |
| 1970 /* | |
| 1971 * Postpone did_emsg, got_int, did_throw. The pending values will be | |
| 1972 * restored by leave_cleanup() except if there was an aborting error, | |
| 1973 * interrupt, or uncaught exception after this function ends. | |
| 1974 */ | |
| 1975 if (did_emsg || got_int || did_throw || need_rethrow) | |
| 1976 { | |
| 1977 csp->pending = (did_emsg ? CSTP_ERROR : 0) | |
| 1978 | (got_int ? CSTP_INTERRUPT : 0) | |
| 1979 | (did_throw ? CSTP_THROW : 0) | |
| 1980 | (need_rethrow ? CSTP_THROW : 0); | |
| 1981 | |
|
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1982 // If we are currently throwing an exception (did_throw), save it as |
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1983 // well. On an error not yet converted to an exception, update |
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1984 // "force_abort" and reset "cause_abort" (as do_errthrow() would do). |
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1985 // This is needed for the do_cmdline() call that is going to be made |
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1986 // for autocommand execution. We need not save *msg_list because |
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1987 // there is an extra instance for every call of do_cmdline(), anyway. |
| 24 | 1988 if (did_throw || need_rethrow) |
|
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1989 { |
| 24 | 1990 csp->exception = current_exception; |
|
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1991 current_exception = NULL; |
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1992 } |
| 24 | 1993 else |
| 1994 { | |
| 1995 csp->exception = NULL; | |
| 1996 if (did_emsg) | |
| 1997 { | |
| 1998 force_abort |= cause_abort; | |
| 1999 cause_abort = FALSE; | |
| 2000 } | |
| 2001 } | |
| 2002 did_emsg = got_int = did_throw = need_rethrow = FALSE; | |
| 2003 | |
|
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2004 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2005 report_make_pending(pending, csp->exception); |
| 2006 } | |
| 2007 else | |
| 2008 { | |
| 2009 csp->pending = CSTP_NONE; | |
| 2010 csp->exception = NULL; | |
| 2011 } | |
| 2012 } | |
| 2013 | |
| 2014 /* | |
| 36 | 2015 * See comment above enter_cleanup() for how this function is used. |
| 2016 * | |
| 2017 * This function is a bit like ex_endtry() except that there was not actually | |
| 2018 * an extra try block around the part that failed and an error or interrupt | |
| 2019 * had not (yet) been converted to an exception when the cleanup autocommand | |
| 2020 * sequence was invoked. | |
| 2021 * | |
| 2022 * This function has to be called with the address of the cleanup_T structure | |
| 2023 * filled by enter_cleanup() as an argument; it restores the error/interrupt/ | |
| 2024 * exception state saved by that function - except there was an aborting | |
| 2025 * error, an interrupt or an uncaught exception during execution of the | |
| 2026 * cleanup autocommands. In the latter case, the saved error/interrupt/ | |
| 2027 * exception state is discarded. | |
| 24 | 2028 */ |
| 2029 void | |
|
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2030 leave_cleanup(cleanup_T *csp) |
| 24 | 2031 { |
| 2032 int pending = csp->pending; | |
| 2033 | |
|
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2034 if (pending == CSTP_NONE) // nothing to do |
| 24 | 2035 return; |
| 2036 | |
|
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2037 // If there was an aborting error, an interrupt, or an uncaught exception |
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2038 // after the corresponding call to enter_cleanup(), discard what has been |
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2039 // made pending by it. Report this to the user if required by the |
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2040 // 'verbose' option or when debugging. |
| 24 | 2041 if (aborting() || need_rethrow) |
| 2042 { | |
| 2043 if (pending & CSTP_THROW) | |
|
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2044 // Cancel the pending exception (includes report). |
| 24 | 2045 discard_exception((except_T *)csp->exception, FALSE); |
| 2046 else | |
| 2047 report_discard_pending(pending, NULL); | |
| 2048 | |
|
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2049 // If an error was about to be converted to an exception when |
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2050 // enter_cleanup() was called, free the message list. |
| 1046 | 2051 if (msg_list != NULL) |
| 5517 | 2052 free_global_msglist(); |
| 24 | 2053 } |
| 2054 | |
| 2055 /* | |
| 2056 * If there was no new error, interrupt, or throw between the calls | |
| 2057 * to enter_cleanup() and leave_cleanup(), restore the pending | |
| 2058 * error/interrupt/exception state. | |
| 2059 */ | |
| 2060 else | |
| 2061 { | |
| 2062 /* | |
| 2063 * If there was an exception being thrown when enter_cleanup() was | |
| 2064 * called, we need to rethrow it. Make it the exception currently | |
| 2065 * being thrown. | |
| 2066 */ | |
| 2067 if (pending & CSTP_THROW) | |
| 2068 current_exception = csp->exception; | |
| 2069 | |
| 2070 /* | |
| 2071 * If an error was about to be converted to an exception when | |
| 2072 * enter_cleanup() was called, let "cause_abort" take the part of | |
| 2073 * "force_abort" (as done by cause_errthrow()). | |
| 2074 */ | |
| 2075 else if (pending & CSTP_ERROR) | |
| 2076 { | |
| 2077 cause_abort = force_abort; | |
| 2078 force_abort = FALSE; | |
| 2079 } | |
| 2080 | |
| 2081 /* | |
| 2082 * Restore the pending values of did_emsg, got_int, and did_throw. | |
| 2083 */ | |
| 2084 if (pending & CSTP_ERROR) | |
| 2085 did_emsg = TRUE; | |
| 2086 if (pending & CSTP_INTERRUPT) | |
| 2087 got_int = TRUE; | |
| 2088 if (pending & CSTP_THROW) | |
|
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2089 need_rethrow = TRUE; // did_throw will be set by do_one_cmd() |
| 24 | 2090 |
|
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2091 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2092 report_resume_pending(pending, |
| 36 | 2093 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 24 | 2094 } |
| 2095 } | |
| 2096 | |
| 2097 | |
| 2098 /* | |
| 7 | 2099 * Make conditionals inactive and discard what's pending in finally clauses |
| 2100 * until the conditional type searched for or a try conditional not in its | |
| 79 | 2101 * finally clause is reached. If this is in an active catch clause, finish |
| 2102 * the caught exception. | |
| 2103 * Return the cstack index where the search stopped. | |
| 75 | 2104 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0, |
| 2105 * the latter meaning the innermost try conditional not in its finally clause. | |
| 2106 * "inclusive" tells whether the conditional searched for should be made | |
| 4352 | 2107 * inactive itself (a try conditional not in its finally clause possibly find |
| 75 | 2108 * before is always made inactive). If "inclusive" is TRUE and |
| 2109 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of | |
| 2110 * "emsg_silent", if reset when the try conditional finally reached was | |
| 4352 | 2111 * entered, is restored (used by ex_endtry()). This is normally done only |
| 75 | 2112 * when such a try conditional is left. |
| 7 | 2113 */ |
| 2114 int | |
|
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2115 cleanup_conditionals( |
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2116 cstack_T *cstack, |
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2117 int searched_cond, |
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2118 int inclusive) |
| 7 | 2119 { |
| 2120 int idx; | |
| 2121 int stop = FALSE; | |
| 2122 | |
| 2123 for (idx = cstack->cs_idx; idx >= 0; --idx) | |
| 2124 { | |
| 2125 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 2126 { | |
| 2127 /* | |
| 2128 * Discard anything pending in a finally clause and continue the | |
| 2129 * search. There may also be a pending ":continue", ":break", | |
| 2130 * ":return", or ":finish" before the finally clause. We must not | |
| 2131 * discard it, unless an error or interrupt occurred afterwards. | |
| 2132 */ | |
| 359 | 2133 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) |
| 7 | 2134 { |
| 2135 switch (cstack->cs_pending[idx]) | |
| 2136 { | |
| 2137 case CSTP_NONE: | |
| 2138 break; | |
| 2139 | |
| 2140 case CSTP_CONTINUE: | |
| 2141 case CSTP_BREAK: | |
| 2142 case CSTP_FINISH: | |
| 2143 report_discard_pending(cstack->cs_pending[idx], NULL); | |
| 2144 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2145 break; | |
| 2146 | |
| 2147 case CSTP_RETURN: | |
| 2148 report_discard_pending(CSTP_RETURN, | |
| 68 | 2149 cstack->cs_rettv[idx]); |
| 2150 discard_pending_return(cstack->cs_rettv[idx]); | |
| 7 | 2151 cstack->cs_pending[idx] = CSTP_NONE; |
| 2152 break; | |
| 2153 | |
| 2154 default: | |
| 2155 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 2156 { | |
| 2157 if (cstack->cs_pending[idx] & CSTP_THROW) | |
| 2158 { | |
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2159 // Cancel the pending exception. This is in the |
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2160 // finally clause, so that the stack of the |
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2161 // caught exceptions is not involved. |
| 7 | 2162 discard_exception((except_T *) |
| 2163 cstack->cs_exception[idx], | |
| 2164 FALSE); | |
| 2165 } | |
| 2166 else | |
| 2167 report_discard_pending(cstack->cs_pending[idx], | |
| 2168 NULL); | |
| 2169 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2170 } | |
| 2171 break; | |
| 2172 } | |
| 2173 } | |
| 2174 | |
| 2175 /* | |
| 2176 * Stop at a try conditional not in its finally clause. If this try | |
| 2177 * conditional is in an active catch clause, finish the caught | |
| 2178 * exception. | |
| 2179 */ | |
| 2180 if (!(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 2181 { | |
| 2182 if ((cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 2183 && (cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 2184 finish_exception((except_T *)cstack->cs_exception[idx]); | |
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2185 // Stop at this try conditional - except the try block never |
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2186 // got active (because of an inactive surrounding conditional |
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2187 // or when the ":try" appeared after an error or interrupt or |
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2188 // throw). |
| 7 | 2189 if (cstack->cs_flags[idx] & CSF_TRUE) |
| 2190 { | |
| 2191 if (searched_cond == 0 && !inclusive) | |
| 2192 break; | |
| 2193 stop = TRUE; | |
| 2194 } | |
| 2195 } | |
| 2196 } | |
| 2197 | |
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2198 // Stop on the searched conditional type (even when the surrounding |
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2199 // conditional is not active or something has been made pending). |
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2200 // If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT, |
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2201 // check first whether "emsg_silent" needs to be restored. |
| 7 | 2202 if (cstack->cs_flags[idx] & searched_cond) |
| 2203 { | |
| 2204 if (!inclusive) | |
| 2205 break; | |
| 2206 stop = TRUE; | |
| 2207 } | |
| 2208 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 2209 if (stop && searched_cond != (CSF_TRY | CSF_SILENT)) | |
| 2210 break; | |
| 2211 | |
| 2212 /* | |
| 1214 | 2213 * When leaving a try conditional that reset "emsg_silent" on its |
| 2214 * entry after saving the original value, restore that value here and | |
| 2215 * free the memory used to store it. | |
| 7 | 2216 */ |
| 2217 if ((cstack->cs_flags[idx] & CSF_TRY) | |
| 359 | 2218 && (cstack->cs_flags[idx] & CSF_SILENT)) |
| 7 | 2219 { |
| 2220 eslist_T *elem; | |
| 2221 | |
| 2222 elem = cstack->cs_emsg_silent_list; | |
| 2223 cstack->cs_emsg_silent_list = elem->next; | |
| 2224 emsg_silent = elem->saved_emsg_silent; | |
| 2225 vim_free(elem); | |
| 2226 cstack->cs_flags[idx] &= ~CSF_SILENT; | |
| 2227 } | |
| 2228 if (stop) | |
| 2229 break; | |
| 2230 } | |
| 2231 return idx; | |
| 2232 } | |
| 2233 | |
| 2234 /* | |
| 75 | 2235 * Return an appropriate error message for a missing endwhile/endfor/endif. |
| 2236 */ | |
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2237 static char * |
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2238 get_end_emsg(cstack_T *cstack) |
| 75 | 2239 { |
| 2240 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE) | |
| 2241 return e_endwhile; | |
| 2242 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) | |
| 2243 return e_endfor; | |
| 2244 return e_endif; | |
| 2245 } | |
| 2246 | |
| 2247 | |
| 2248 /* | |
| 7 | 2249 * Rewind conditionals until index "idx" is reached. "cond_type" and |
| 2250 * "cond_level" specify a conditional type and the address of a level variable | |
| 2251 * which is to be decremented with each skipped conditional of the specified | |
| 2252 * type. | |
| 79 | 2253 * Also free "for info" structures where needed. |
| 7 | 2254 */ |
| 79 | 2255 void |
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2256 rewind_conditionals( |
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2257 cstack_T *cstack, |
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2258 int idx, |
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2259 int cond_type, |
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2260 int *cond_level) |
| 7 | 2261 { |
| 2262 while (cstack->cs_idx > idx) | |
| 2263 { | |
| 2264 if (cstack->cs_flags[cstack->cs_idx] & cond_type) | |
| 2265 --*cond_level; | |
| 79 | 2266 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
| 2267 free_for_info(cstack->cs_forinfo[cstack->cs_idx]); | |
| 7 | 2268 --cstack->cs_idx; |
| 2269 } | |
| 2270 } | |
| 2271 | |
| 2272 /* | |
| 2273 * ":endfunction" when not after a ":function" | |
| 2274 */ | |
| 2275 void | |
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2276 ex_endfunction(exarg_T *eap UNUSED) |
| 7 | 2277 { |
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2278 emsg(_("E193: :endfunction not inside a function")); |
| 7 | 2279 } |
| 2280 | |
| 2281 /* | |
| 75 | 2282 * Return TRUE if the string "p" looks like a ":while" or ":for" command. |
| 7 | 2283 */ |
| 2284 int | |
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2285 has_loop_cmd(char_u *p) |
| 7 | 2286 { |
| 1447 | 2287 int len; |
| 2288 | |
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2289 // skip modifiers, white space and ':' |
| 1447 | 2290 for (;;) |
| 2291 { | |
| 2292 while (*p == ' ' || *p == '\t' || *p == ':') | |
| 2293 ++p; | |
| 2294 len = modifier_len(p); | |
| 2295 if (len == 0) | |
| 2296 break; | |
| 2297 p += len; | |
| 2298 } | |
| 75 | 2299 if ((p[0] == 'w' && p[1] == 'h') |
| 2300 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r')) | |
| 7 | 2301 return TRUE; |
| 2302 return FALSE; | |
| 2303 } | |
| 2304 | |
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2305 #endif // FEAT_EVAL |