Mercurial > vim
annotate src/ex_eval.c @ 17447:c8bdaff91140
Added tag v8.1.1721 for changeset dcc4120f841294dfadbc2c59e479a669410474b5
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sat, 20 Jul 2019 19:15:05 +0200 |
| parents | ce04ebdf26b8 |
| children | 072efa9ca875 |
| 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 int throw_exception(void *, except_type_T, char_u *); |
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19 static char *get_end_emsg(struct condstack *cstack); |
| 7 | 20 |
| 21 /* | |
| 22 * Exception handling terms: | |
| 23 * | |
| 24 * :try ":try" command \ | |
| 25 * ... try block | | |
| 26 * :catch RE ":catch" command | | |
| 27 * ... catch clause |- try conditional | |
| 28 * :finally ":finally" command | | |
| 29 * ... finally clause | | |
| 30 * :endtry ":endtry" command / | |
| 31 * | |
| 32 * The try conditional may have any number of catch clauses and at most one | |
| 33 * finally clause. A ":throw" command can be inside the try block, a catch | |
| 34 * clause, the finally clause, or in a function called or script sourced from | |
| 35 * there or even outside the try conditional. Try conditionals may be nested. | |
| 36 */ | |
| 37 | |
| 38 /* | |
| 39 * Configuration whether an exception is thrown on error or interrupt. When | |
| 40 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or | |
| 41 * interrupt (got_int) under an active try conditional terminates the script | |
| 42 * after the non-active finally clauses of all active try conditionals have been | |
| 43 * executed. Otherwise, errors and/or interrupts are converted into catchable | |
| 44 * exceptions (did_throw additionally set), which terminate the script only if | |
| 45 * not caught. For user exceptions, only did_throw is set. (Note: got_int can | |
| 4352 | 46 * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not |
| 7 | 47 * a reliant test that the exception currently being thrown is an interrupt |
| 48 * exception. Similarly, did_emsg can be set afterwards on an error in an | |
| 49 * (unskipped) conditional command inside an inactive conditional, so did_throw | |
| 50 * && did_emsg is not a reliant test that the exception currently being thrown | |
| 51 * is an error exception.) - The macros can be defined as expressions checking | |
| 52 * for a variable that is allowed to be changed during execution of a script. | |
| 53 */ | |
| 54 #if 0 | |
| 55 /* Expressions used for testing during the development phase. */ | |
| 56 # define THROW_ON_ERROR (!eval_to_number("$VIMNOERRTHROW")) | |
| 57 # define THROW_ON_INTERRUPT (!eval_to_number("$VIMNOINTTHROW")) | |
| 58 # define THROW_TEST | |
| 59 #else | |
| 60 /* Values used for the Vim release. */ | |
| 61 # define THROW_ON_ERROR TRUE | |
| 1880 | 62 # define THROW_ON_ERROR_TRUE |
| 7 | 63 # define THROW_ON_INTERRUPT TRUE |
| 1880 | 64 # define THROW_ON_INTERRUPT_TRUE |
| 7 | 65 #endif |
| 66 | |
| 67 /* | |
| 68 * When several errors appear in a row, setting "force_abort" is delayed until | |
| 69 * the failing command returned. "cause_abort" is set to TRUE meanwhile, in | |
| 70 * order to indicate that situation. This is useful when "force_abort" was set | |
| 71 * during execution of a function call from an expression: the aborting of the | |
| 72 * expression evaluation is done without producing any error messages, but all | |
| 73 * error messages on parsing errors during the expression evaluation are given | |
| 74 * (even if a try conditional is active). | |
| 75 */ | |
| 76 static int cause_abort = FALSE; | |
| 77 | |
| 78 /* | |
| 1214 | 79 * Return TRUE when immediately aborting on error, or when an interrupt |
| 7 | 80 * occurred or an exception was thrown but not caught. Use for ":{range}call" |
| 81 * to check whether an aborted function that does not handle a range itself | |
| 82 * should be called again for the next line in the range. Also used for | |
| 83 * cancelling expression evaluation after a function call caused an immediate | |
| 84 * abort. Note that the first emsg() call temporarily resets "force_abort" | |
| 85 * until the throw point for error messages has been reached. That is, during | |
| 86 * cancellation of an expression evaluation after an aborting function call or | |
| 87 * due to a parsing error, aborting() always returns the same value. | |
| 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 { |
| 129 /* This function is only called after an error. In this case, "force_abort" | |
| 130 * determines whether searching for finally clauses is necessary. */ | |
| 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 { | |
| 217 /* When discarding an interrupt exception, reset got_int to prevent the | |
| 218 * same interrupt being converted to an exception again and discarding | |
| 219 * the error exception we are about to throw here. */ | |
| 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 |
| 278 /* Skip the extra "Vim " prefix for message "E458". */ | |
| 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(struct condstack *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 | |
| 344 /* If no exception is to be thrown or the conversion should be done after | |
| 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(struct condstack *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 | |
| 376 #ifdef THROW_TEST /* avoid warning for condition always true */ | |
| 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 | |
| 403 /* An interrupt exception replaces any user or error exception. */ | |
| 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( |
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418 void *value, |
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419 except_type_T type, |
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420 char_u *cmdname, |
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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 { | |
|
8418
89f38c77e11e
commit https://github.com/vim/vim/commit/9ef00be261115acb5bae3b3ca45c1d86a19ba2c7
Christian Brabandt <cb@256bit.org>
parents:
7973
diff
changeset
|
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); |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
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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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
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 | |
| 451 /* msg_add_fname may have been used to prefix the message with a file | |
| 452 * name in quotes. In the exception value, put the file name in | |
| 453 * parentheses and move it to the end. */ | |
| 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) |
| 466 STRCAT(val, mesg); /* 'E123' missing or at beginning */ | |
| 7 | 467 else |
| 468 { | |
| 469 /* '"filename" E123: message text' */ | |
| 470 if (mesg[0] != '"' || p-2 < &mesg[1] || | |
| 471 p[-2] != '"' || p[-1] != ' ') | |
| 472 /* "E123:" is part of the file name. */ | |
| 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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patch 8.1.0743: giving error messages is not flexible
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parents:
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diff
changeset
|
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 */ | |
| 500 static int | |
|
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commit https://github.com/vim/vim/commit/8a5883b7488e492419dde7e1637cc72f2d566ba4
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
|
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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changeset
|
517 emsg(_("E608: Cannot :throw exceptions with 'Vim' prefix")); |
| 5517 | 518 goto fail; |
| 519 } | |
| 520 } | |
| 521 | |
|
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patch 8.1.1414: alloc() returning "char_u *" causes a lot of type casts
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diff
changeset
|
522 excp = ALLOC_ONE(except_T); |
| 5517 | 523 if (excp == NULL) |
| 524 goto nomem; | |
| 525 | |
| 526 if (type == ET_ERROR) | |
| 527 /* Store the original message and prefix the exception value with | |
| 528 * "Vim:" or, if a command name is given, "Vim(cmdname):". */ | |
| 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; | |
| 536 excp->throw_name = vim_strsave(sourcing_name == NULL | |
| 537 ? (char_u *)"" : sourcing_name); | |
| 538 if (excp->throw_name == NULL) | |
| 539 { | |
| 5517 | 540 if (should_free) |
| 7 | 541 vim_free(excp->value); |
| 542 goto nomem; | |
| 543 } | |
| 544 excp->throw_lnum = sourcing_lnum; | |
| 545 | |
| 546 if (p_verbose >= 13 || debug_break_level > 0) | |
| 547 { | |
| 548 int save_msg_silent = msg_silent; | |
| 549 | |
| 550 if (debug_break_level > 0) | |
| 551 msg_silent = FALSE; /* display messages */ | |
| 293 | 552 else |
| 553 verbose_enter(); | |
| 7 | 554 ++no_wait_return; |
| 293 | 555 if (debug_break_level > 0 || *p_vfile == NUL) |
| 556 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 557 | |
|
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changeset
|
558 smsg(_("Exception thrown: %s"), excp->value); |
|
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patch 8.1.0779: argument for message functions is inconsistent
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changeset
|
559 msg_puts("\n"); /* don't overwrite this either */ |
| 293 | 560 |
| 561 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 562 cmdline_row = msg_row; | |
| 7 | 563 --no_wait_return; |
| 564 if (debug_break_level > 0) | |
| 565 msg_silent = save_msg_silent; | |
| 293 | 566 else |
| 567 verbose_leave(); | |
| 7 | 568 } |
| 569 | |
| 570 current_exception = excp; | |
| 571 return OK; | |
| 572 | |
| 573 nomem: | |
| 574 vim_free(excp); | |
| 575 suppress_errthrow = TRUE; | |
|
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patch 8.1.0743: giving error messages is not flexible
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diff
changeset
|
576 emsg(_(e_outofmem)); |
| 7 | 577 fail: |
| 578 current_exception = NULL; | |
| 579 return FAIL; | |
| 580 } | |
| 581 | |
| 582 /* | |
| 583 * Discard an exception. "was_finished" is set when the exception has been | |
| 584 * caught and the catch clause has been ended normally. | |
| 585 */ | |
| 586 static void | |
|
7819
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
587 discard_exception(except_T *excp, int was_finished) |
| 7 | 588 { |
| 589 char_u *saved_IObuff; | |
| 590 | |
| 591 if (excp == NULL) | |
| 592 { | |
|
10359
66f1b5bf3fa6
commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
593 internal_error("discard_exception()"); |
| 7 | 594 return; |
| 595 } | |
| 596 | |
| 597 if (p_verbose >= 13 || debug_break_level > 0) | |
| 598 { | |
| 599 int save_msg_silent = msg_silent; | |
| 600 | |
| 601 saved_IObuff = vim_strsave(IObuff); | |
| 602 if (debug_break_level > 0) | |
| 603 msg_silent = FALSE; /* display messages */ | |
| 293 | 604 else |
| 605 verbose_enter(); | |
| 7 | 606 ++no_wait_return; |
| 293 | 607 if (debug_break_level > 0 || *p_vfile == NUL) |
| 608 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 273 | 609 smsg(was_finished |
|
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diff
changeset
|
610 ? _("Exception finished: %s") |
|
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parents:
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diff
changeset
|
611 : _("Exception discarded: %s"), |
| 7 | 612 excp->value); |
|
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diff
changeset
|
613 msg_puts("\n"); /* don't overwrite this either */ |
| 293 | 614 if (debug_break_level > 0 || *p_vfile == NUL) |
| 615 cmdline_row = msg_row; | |
| 7 | 616 --no_wait_return; |
| 617 if (debug_break_level > 0) | |
| 618 msg_silent = save_msg_silent; | |
| 293 | 619 else |
| 620 verbose_leave(); | |
| 7 | 621 STRCPY(IObuff, saved_IObuff); |
| 622 vim_free(saved_IObuff); | |
| 623 } | |
| 624 if (excp->type != ET_INTERRUPT) | |
| 625 vim_free(excp->value); | |
| 626 if (excp->type == ET_ERROR) | |
| 627 free_msglist(excp->messages); | |
| 628 vim_free(excp->throw_name); | |
| 629 vim_free(excp); | |
| 630 } | |
| 631 | |
| 632 /* | |
| 633 * Discard the exception currently being thrown. | |
| 634 */ | |
| 635 void | |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
636 discard_current_exception(void) |
| 7 | 637 { |
|
11645
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patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
|
638 if (current_exception != NULL) |
|
50f2a4ad1cfa
patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
|
639 { |
|
50f2a4ad1cfa
patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
10361
diff
changeset
|
640 discard_exception(current_exception, FALSE); |
|
50f2a4ad1cfa
patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
10361
diff
changeset
|
641 current_exception = NULL; |
|
50f2a4ad1cfa
patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
10361
diff
changeset
|
642 } |
| 7 | 643 did_throw = FALSE; |
| 644 need_rethrow = FALSE; | |
| 645 } | |
| 646 | |
| 647 /* | |
| 648 * Put an exception on the caught stack. | |
| 649 */ | |
| 650 static void | |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
651 catch_exception(except_T *excp) |
| 7 | 652 { |
| 653 excp->caught = caught_stack; | |
| 654 caught_stack = excp; | |
|
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parents:
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diff
changeset
|
655 set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1); |
| 7 | 656 if (*excp->throw_name != NUL) |
| 657 { | |
| 658 if (excp->throw_lnum != 0) | |
| 273 | 659 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"), |
| 660 excp->throw_name, (long)excp->throw_lnum); | |
| 7 | 661 else |
| 273 | 662 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name); |
| 7 | 663 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 664 } | |
| 665 else | |
| 666 /* throw_name not set on an exception from a command that was typed. */ | |
| 667 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 668 | |
| 669 if (p_verbose >= 13 || debug_break_level > 0) | |
| 670 { | |
| 671 int save_msg_silent = msg_silent; | |
| 672 | |
| 673 if (debug_break_level > 0) | |
| 674 msg_silent = FALSE; /* display messages */ | |
| 293 | 675 else |
| 676 verbose_enter(); | |
| 7 | 677 ++no_wait_return; |
| 293 | 678 if (debug_break_level > 0 || *p_vfile == NUL) |
| 679 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 680 | |
|
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diff
changeset
|
681 smsg(_("Exception caught: %s"), excp->value); |
|
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diff
changeset
|
682 msg_puts("\n"); /* don't overwrite this either */ |
| 293 | 683 |
| 684 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 685 cmdline_row = msg_row; | |
| 7 | 686 --no_wait_return; |
| 687 if (debug_break_level > 0) | |
| 688 msg_silent = save_msg_silent; | |
| 293 | 689 else |
| 690 verbose_leave(); | |
| 7 | 691 } |
| 692 } | |
| 693 | |
| 694 /* | |
| 695 * Remove an exception from the caught stack. | |
| 696 */ | |
| 697 static void | |
|
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f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
698 finish_exception(except_T *excp) |
| 7 | 699 { |
| 700 if (excp != caught_stack) | |
|
10359
66f1b5bf3fa6
commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
701 internal_error("finish_exception()"); |
| 7 | 702 caught_stack = caught_stack->caught; |
| 703 if (caught_stack != NULL) | |
| 704 { | |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
705 set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1); |
| 7 | 706 if (*caught_stack->throw_name != NUL) |
| 707 { | |
| 708 if (caught_stack->throw_lnum != 0) | |
| 273 | 709 vim_snprintf((char *)IObuff, IOSIZE, |
| 7 | 710 _("%s, line %ld"), caught_stack->throw_name, |
| 711 (long)caught_stack->throw_lnum); | |
| 712 else | |
| 273 | 713 vim_snprintf((char *)IObuff, IOSIZE, "%s", |
| 714 caught_stack->throw_name); | |
| 7 | 715 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 716 } | |
| 717 else | |
| 718 /* throw_name not set on an exception from a command that was | |
| 719 * typed. */ | |
| 720 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 721 } | |
| 722 else | |
| 723 { | |
| 724 set_vim_var_string(VV_EXCEPTION, NULL, -1); | |
| 725 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 726 } | |
| 727 | |
| 728 /* Discard the exception, but use the finish message for 'verbose'. */ | |
| 729 discard_exception(excp, TRUE); | |
| 730 } | |
| 731 | |
| 732 /* | |
| 733 * Flags specifying the message displayed by report_pending. | |
| 734 */ | |
| 735 #define RP_MAKE 0 | |
| 736 #define RP_RESUME 1 | |
| 737 #define RP_DISCARD 2 | |
| 738 | |
| 739 /* | |
| 740 * Report information about something pending in a finally clause if required by | |
| 741 * the 'verbose' option or when debugging. "action" tells whether something is | |
| 742 * made pending or something pending is resumed or discarded. "pending" tells | |
| 743 * what is pending. "value" specifies the return value for a pending ":return" | |
| 744 * or the exception value for a pending exception. | |
| 745 */ | |
| 746 static void | |
|
7819
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
747 report_pending(int action, int pending, void *value) |
| 7 | 748 { |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
749 char *mesg; |
| 7 | 750 char *s; |
| 751 int save_msg_silent; | |
| 752 | |
| 753 | |
| 754 switch (action) | |
| 755 { | |
| 756 case RP_MAKE: | |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
757 mesg = _("%s made pending"); |
| 7 | 758 break; |
| 759 case RP_RESUME: | |
|
15470
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
760 mesg = _("%s resumed"); |
| 7 | 761 break; |
| 762 /* case RP_DISCARD: */ | |
| 763 default: | |
|
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55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
764 mesg = _("%s discarded"); |
| 7 | 765 break; |
| 766 } | |
| 767 | |
| 768 switch (pending) | |
| 769 { | |
| 770 case CSTP_NONE: | |
| 771 return; | |
| 772 | |
| 773 case CSTP_CONTINUE: | |
| 774 s = ":continue"; | |
| 775 break; | |
| 776 case CSTP_BREAK: | |
| 777 s = ":break"; | |
| 778 break; | |
| 779 case CSTP_FINISH: | |
| 780 s = ":finish"; | |
| 781 break; | |
| 782 case CSTP_RETURN: | |
| 783 /* ":return" command producing value, allocated */ | |
| 784 s = (char *)get_return_cmd(value); | |
| 785 break; | |
| 786 | |
| 787 default: | |
| 788 if (pending & CSTP_THROW) | |
| 789 { | |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
790 vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception")); |
|
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
791 mesg = (char *)vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4); |
| 7 | 792 STRCAT(mesg, ": %s"); |
| 793 s = (char *)((except_T *)value)->value; | |
| 794 } | |
| 795 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT)) | |
| 796 s = _("Error and interrupt"); | |
| 797 else if (pending & CSTP_ERROR) | |
| 798 s = _("Error"); | |
| 799 else /* if (pending & CSTP_INTERRUPT) */ | |
| 800 s = _("Interrupt"); | |
| 801 } | |
| 802 | |
| 803 save_msg_silent = msg_silent; | |
| 804 if (debug_break_level > 0) | |
| 805 msg_silent = FALSE; /* display messages */ | |
| 806 ++no_wait_return; | |
| 807 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
808 smsg(mesg, s); |
|
15543
dd725a8ab112
patch 8.1.0779: argument for message functions is inconsistent
Bram Moolenaar <Bram@vim.org>
parents:
15470
diff
changeset
|
809 msg_puts("\n"); /* don't overwrite this either */ |
| 7 | 810 cmdline_row = msg_row; |
| 811 --no_wait_return; | |
| 812 if (debug_break_level > 0) | |
| 813 msg_silent = save_msg_silent; | |
| 814 | |
| 815 if (pending == CSTP_RETURN) | |
| 816 vim_free(s); | |
| 817 else if (pending & CSTP_THROW) | |
| 818 vim_free(mesg); | |
| 819 } | |
| 820 | |
| 821 /* | |
| 822 * If something is made pending in a finally clause, report it if required by | |
| 823 * the 'verbose' option or when debugging. | |
| 824 */ | |
| 825 void | |
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826 report_make_pending(int pending, void *value) |
| 7 | 827 { |
| 828 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 829 { |
| 830 if (debug_break_level <= 0) | |
| 831 verbose_enter(); | |
| 7 | 832 report_pending(RP_MAKE, pending, value); |
| 293 | 833 if (debug_break_level <= 0) |
| 834 verbose_leave(); | |
| 835 } | |
| 7 | 836 } |
| 837 | |
| 838 /* | |
| 839 * If something pending in a finally clause is resumed at the ":endtry", report | |
| 840 * it if required by the 'verbose' option or when debugging. | |
| 841 */ | |
| 842 void | |
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843 report_resume_pending(int pending, void *value) |
| 7 | 844 { |
| 845 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 846 { |
| 847 if (debug_break_level <= 0) | |
| 848 verbose_enter(); | |
| 7 | 849 report_pending(RP_RESUME, pending, value); |
| 293 | 850 if (debug_break_level <= 0) |
| 851 verbose_leave(); | |
| 852 } | |
| 7 | 853 } |
| 854 | |
| 855 /* | |
| 856 * If something pending in a finally clause is discarded, report it if required | |
| 857 * by the 'verbose' option or when debugging. | |
| 858 */ | |
| 859 void | |
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860 report_discard_pending(int pending, void *value) |
| 7 | 861 { |
| 862 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 863 { |
| 864 if (debug_break_level <= 0) | |
| 865 verbose_enter(); | |
| 7 | 866 report_pending(RP_DISCARD, pending, value); |
| 293 | 867 if (debug_break_level <= 0) |
| 868 verbose_leave(); | |
| 869 } | |
| 7 | 870 } |
| 871 | |
| 872 | |
| 873 /* | |
| 874 * ":if". | |
| 875 */ | |
| 876 void | |
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877 ex_if(exarg_T *eap) |
| 7 | 878 { |
| 879 int error; | |
| 880 int skip; | |
| 881 int result; | |
| 882 struct condstack *cstack = eap->cstack; | |
| 883 | |
| 884 if (cstack->cs_idx == CSTACK_LEN - 1) | |
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885 eap->errmsg = N_("E579: :if nesting too deep"); |
| 7 | 886 else |
| 887 { | |
| 888 ++cstack->cs_idx; | |
| 889 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 890 | |
| 891 /* | |
| 892 * Don't do something after an error, interrupt, or throw, or when there | |
| 893 * is a surrounding conditional and it was not active. | |
| 894 */ | |
| 895 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 896 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 897 | |
| 898 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 899 | |
| 900 if (!skip && !error) | |
| 901 { | |
| 902 if (result) | |
| 903 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 904 } | |
| 905 else | |
| 906 /* set TRUE, so this conditional will never get active */ | |
| 907 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 908 } | |
| 909 } | |
| 910 | |
| 911 /* | |
| 912 * ":endif". | |
| 913 */ | |
| 914 void | |
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915 ex_endif(exarg_T *eap) |
| 7 | 916 { |
| 917 did_endif = TRUE; | |
| 918 if (eap->cstack->cs_idx < 0 | |
| 79 | 919 || (eap->cstack->cs_flags[eap->cstack->cs_idx] |
| 920 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
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921 eap->errmsg = N_("E580: :endif without :if"); |
| 7 | 922 else |
| 923 { | |
| 924 /* | |
| 925 * When debugging or a breakpoint was encountered, display the debug | |
| 926 * prompt (if not already done). This shows the user that an ":endif" | |
| 927 * is executed when the ":if" or a previous ":elseif" was not TRUE. | |
| 928 * Handle a ">quit" debug command as if an interrupt had occurred before | |
| 929 * the ":endif". That is, throw an interrupt exception if appropriate. | |
| 930 * Doing this here prevents an exception for a parsing error being | |
| 931 * discarded by throwing the interrupt exception later on. | |
| 932 */ | |
| 359 | 933 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE) |
| 934 && dbg_check_skipped(eap)) | |
| 7 | 935 (void)do_intthrow(eap->cstack); |
| 936 | |
| 937 --eap->cstack->cs_idx; | |
| 938 } | |
| 939 } | |
| 940 | |
| 941 /* | |
| 942 * ":else" and ":elseif". | |
| 943 */ | |
| 944 void | |
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945 ex_else(exarg_T *eap) |
| 7 | 946 { |
| 947 int error; | |
| 948 int skip; | |
| 949 int result; | |
| 950 struct condstack *cstack = eap->cstack; | |
| 951 | |
| 952 /* | |
| 953 * Don't do something after an error, interrupt, or throw, or when there is | |
| 954 * a surrounding conditional and it was not active. | |
| 955 */ | |
| 956 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 957 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 958 | |
| 959 if (cstack->cs_idx < 0 | |
| 75 | 960 || (cstack->cs_flags[cstack->cs_idx] |
| 961 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
| 7 | 962 { |
| 963 if (eap->cmdidx == CMD_else) | |
| 964 { | |
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965 eap->errmsg = N_("E581: :else without :if"); |
| 7 | 966 return; |
| 967 } | |
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968 eap->errmsg = N_("E582: :elseif without :if"); |
| 7 | 969 skip = TRUE; |
| 970 } | |
| 971 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) | |
| 972 { | |
| 973 if (eap->cmdidx == CMD_else) | |
| 974 { | |
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975 eap->errmsg = N_("E583: multiple :else"); |
| 7 | 976 return; |
| 977 } | |
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978 eap->errmsg = N_("E584: :elseif after :else"); |
| 7 | 979 skip = TRUE; |
| 980 } | |
| 981 | |
| 982 /* if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it */ | |
| 983 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) | |
| 984 { | |
| 985 if (eap->errmsg == NULL) | |
| 986 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 987 skip = TRUE; /* don't evaluate an ":elseif" */ | |
| 988 } | |
| 989 else | |
| 990 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE; | |
| 991 | |
| 992 /* | |
| 993 * When debugging or a breakpoint was encountered, display the debug prompt | |
| 994 * (if not already done). This shows the user that an ":else" or ":elseif" | |
| 995 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle | |
| 996 * a ">quit" debug command as if an interrupt had occurred before the | |
| 997 * ":else" or ":elseif". That is, set "skip" and throw an interrupt | |
| 998 * exception if appropriate. Doing this here prevents that an exception | |
| 999 * for a parsing errors is discarded when throwing the interrupt exception | |
| 1000 * later on. | |
| 1001 */ | |
| 1002 if (!skip && dbg_check_skipped(eap) && got_int) | |
| 1003 { | |
| 1004 (void)do_intthrow(cstack); | |
| 1005 skip = TRUE; | |
| 1006 } | |
| 1007 | |
| 1008 if (eap->cmdidx == CMD_elseif) | |
| 1009 { | |
| 1010 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 1011 /* When throwing error exceptions, we want to throw always the first | |
| 1012 * of several errors in a row. This is what actually happens when | |
| 1013 * a conditional error was detected above and there is another failure | |
| 1014 * when parsing the expression. Since the skip flag is set in this | |
| 1015 * case, the parsing error will be ignored by emsg(). */ | |
| 1016 | |
| 1017 if (!skip && !error) | |
| 1018 { | |
| 1019 if (result) | |
| 1020 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 1021 else | |
| 1022 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 1023 } | |
| 1024 else if (eap->errmsg == NULL) | |
| 1025 /* set TRUE, so this conditional will never get active */ | |
| 1026 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 1027 } | |
| 1028 else | |
| 1029 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE; | |
| 1030 } | |
| 1031 | |
| 1032 /* | |
| 75 | 1033 * Handle ":while" and ":for". |
| 7 | 1034 */ |
| 1035 void | |
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1036 ex_while(exarg_T *eap) |
| 7 | 1037 { |
| 1038 int error; | |
| 1039 int skip; | |
| 1040 int result; | |
| 1041 struct condstack *cstack = eap->cstack; | |
| 1042 | |
| 1043 if (cstack->cs_idx == CSTACK_LEN - 1) | |
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1044 eap->errmsg = N_("E585: :while/:for nesting too deep"); |
| 7 | 1045 else |
| 1046 { | |
| 1047 /* | |
| 75 | 1048 * The loop flag is set when we have jumped back from the matching |
| 1049 * ":endwhile" or ":endfor". When not set, need to initialise this | |
| 1050 * cstack entry. | |
| 7 | 1051 */ |
| 75 | 1052 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) |
| 7 | 1053 { |
| 1054 ++cstack->cs_idx; | |
| 75 | 1055 ++cstack->cs_looplevel; |
| 7 | 1056 cstack->cs_line[cstack->cs_idx] = -1; |
| 1057 } | |
| 75 | 1058 cstack->cs_flags[cstack->cs_idx] = |
| 1059 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR; | |
| 7 | 1060 |
| 1061 /* | |
| 75 | 1062 * Don't do something after an error, interrupt, or throw, or when |
| 1063 * there is a surrounding conditional and it was not active. | |
| 7 | 1064 */ |
| 1065 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1066 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 75 | 1067 if (eap->cmdidx == CMD_while) |
| 1068 { | |
| 1069 /* | |
| 1070 * ":while bool-expr" | |
| 1071 */ | |
| 1072 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 1073 } | |
| 1074 else | |
| 1075 { | |
| 1076 void *fi; | |
| 1077 | |
| 1078 /* | |
| 1079 * ":for var in list-expr" | |
| 1080 */ | |
| 1081 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) | |
| 1082 { | |
| 1083 /* Jumping here from a ":continue" or ":endfor": use the | |
| 1084 * previously evaluated list. */ | |
| 79 | 1085 fi = cstack->cs_forinfo[cstack->cs_idx]; |
| 75 | 1086 error = FALSE; |
| 1087 } | |
| 1088 else | |
| 1089 { | |
| 1090 /* Evaluate the argument and get the info in a structure. */ | |
| 1091 fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip); | |
| 79 | 1092 cstack->cs_forinfo[cstack->cs_idx] = fi; |
| 75 | 1093 } |
| 1094 | |
| 1095 /* use the element at the start of the list and advance */ | |
| 1096 if (!error && fi != NULL && !skip) | |
| 1097 result = next_for_item(fi, eap->arg); | |
| 1098 else | |
| 1099 result = FALSE; | |
| 1100 | |
| 1101 if (!result) | |
| 1102 { | |
| 1103 free_for_info(fi); | |
| 79 | 1104 cstack->cs_forinfo[cstack->cs_idx] = NULL; |
| 75 | 1105 } |
| 1106 } | |
| 7 | 1107 |
| 1108 /* | |
| 75 | 1109 * If this cstack entry was just initialised and is active, set the |
| 1110 * loop flag, so do_cmdline() will set the line number in cs_line[]. | |
| 1111 * If executing the command a second time, clear the loop flag. | |
| 7 | 1112 */ |
| 1113 if (!skip && !error && result) | |
| 1114 { | |
| 75 | 1115 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE); |
| 1116 cstack->cs_lflags ^= CSL_HAD_LOOP; | |
| 7 | 1117 } |
| 1118 else | |
| 1119 { | |
| 75 | 1120 cstack->cs_lflags &= ~CSL_HAD_LOOP; |
| 1121 /* If the ":while" evaluates to FALSE or ":for" is past the end of | |
| 1122 * the list, show the debug prompt at the ":endwhile"/":endfor" as | |
| 1123 * if there was a ":break" in a ":while"/":for" evaluating to | |
| 1124 * TRUE. */ | |
| 7 | 1125 if (!skip && !error) |
| 1126 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE; | |
| 1127 } | |
| 1128 } | |
| 1129 } | |
| 1130 | |
| 1131 /* | |
| 1132 * ":continue" | |
| 1133 */ | |
| 1134 void | |
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1135 ex_continue(exarg_T *eap) |
| 7 | 1136 { |
| 1137 int idx; | |
| 1138 struct condstack *cstack = eap->cstack; | |
| 1139 | |
| 75 | 1140 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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1141 eap->errmsg = N_("E586: :continue without :while or :for"); |
| 7 | 1142 else |
| 1143 { | |
| 1144 /* Try to find the matching ":while". This might stop at a try | |
| 1145 * conditional not in its finally clause (which is then to be executed | |
| 1146 * next). Therefor, inactivate all conditionals except the ":while" | |
| 1147 * itself (if reached). */ | |
| 75 | 1148 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 840 | 1149 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1150 { |
| 79 | 1151 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 7 | 1152 |
| 1153 /* | |
| 75 | 1154 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the |
| 7 | 1155 * matching ":while". |
| 1156 */ | |
| 75 | 1157 cstack->cs_lflags |= CSL_HAD_CONT; /* let do_cmdline() handle it */ |
| 7 | 1158 } |
| 1159 else | |
| 1160 { | |
| 1161 /* If a try conditional not in its finally clause is reached first, | |
| 1162 * make the ":continue" pending for execution at the ":endtry". */ | |
| 1163 cstack->cs_pending[idx] = CSTP_CONTINUE; | |
| 1164 report_make_pending(CSTP_CONTINUE, NULL); | |
| 1165 } | |
| 1166 } | |
| 1167 } | |
| 1168 | |
| 1169 /* | |
| 1170 * ":break" | |
| 1171 */ | |
| 1172 void | |
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changeset
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1173 ex_break(exarg_T *eap) |
| 7 | 1174 { |
| 1175 int idx; | |
| 1176 struct condstack *cstack = eap->cstack; | |
| 1177 | |
| 75 | 1178 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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changeset
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1179 eap->errmsg = N_("E587: :break without :while or :for"); |
| 7 | 1180 else |
| 1181 { | |
| 1182 /* Inactivate conditionals until the matching ":while" or a try | |
| 1183 * conditional not in its finally clause (which is then to be | |
| 1184 * executed next) is found. In the latter case, make the ":break" | |
| 1185 * pending for execution at the ":endtry". */ | |
| 75 | 1186 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE); |
| 840 | 1187 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1188 { |
| 1189 cstack->cs_pending[idx] = CSTP_BREAK; | |
| 1190 report_make_pending(CSTP_BREAK, NULL); | |
| 1191 } | |
| 1192 } | |
| 1193 } | |
| 1194 | |
| 1195 /* | |
| 75 | 1196 * ":endwhile" and ":endfor" |
| 7 | 1197 */ |
| 1198 void | |
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1199 ex_endwhile(exarg_T *eap) |
| 7 | 1200 { |
| 1201 struct condstack *cstack = eap->cstack; | |
| 75 | 1202 int idx; |
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1203 char *err; |
| 75 | 1204 int csf; |
| 1205 int fl; | |
| 7 | 1206 |
| 75 | 1207 if (eap->cmdidx == CMD_endwhile) |
| 1208 { | |
| 1209 err = e_while; | |
| 1210 csf = CSF_WHILE; | |
| 1211 } | |
| 1212 else | |
| 1213 { | |
| 1214 err = e_for; | |
| 1215 csf = CSF_FOR; | |
| 1216 } | |
| 1217 | |
| 1218 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) | |
| 1219 eap->errmsg = err; | |
| 7 | 1220 else |
| 1221 { | |
| 75 | 1222 fl = cstack->cs_flags[cstack->cs_idx]; |
| 1223 if (!(fl & csf)) | |
| 7 | 1224 { |
| 114 | 1225 /* If we are in a ":while" or ":for" but used the wrong endloop |
| 1226 * command, do not rewind to the next enclosing ":for"/":while". */ | |
| 75 | 1227 if (fl & CSF_WHILE) |
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1228 eap->errmsg = _("E732: Using :endfor with :while"); |
| 75 | 1229 else if (fl & CSF_FOR) |
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1230 eap->errmsg = _("E733: Using :endwhile with :for"); |
| 114 | 1231 } |
| 1232 if (!(fl & (CSF_WHILE | CSF_FOR))) | |
| 1233 { | |
| 1234 if (!(fl & CSF_TRY)) | |
| 75 | 1235 eap->errmsg = e_endif; |
| 1236 else if (fl & CSF_FINALLY) | |
| 1237 eap->errmsg = e_endtry; | |
| 7 | 1238 /* Try to find the matching ":while" and report what's missing. */ |
| 1239 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1240 { | |
| 75 | 1241 fl = cstack->cs_flags[idx]; |
| 1242 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) | |
| 7 | 1243 { |
| 1244 /* Give up at a try conditional not in its finally clause. | |
| 75 | 1245 * Ignore the ":endwhile"/":endfor". */ |
| 1246 eap->errmsg = err; | |
| 7 | 1247 return; |
| 1248 } | |
| 75 | 1249 if (fl & csf) |
| 7 | 1250 break; |
| 1251 } | |
| 1252 /* Cleanup and rewind all contained (and unclosed) conditionals. */ | |
| 75 | 1253 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 7 | 1254 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 1255 } | |
| 1256 | |
| 1257 /* | |
| 1258 * When debugging or a breakpoint was encountered, display the debug | |
| 1259 * prompt (if not already done). This shows the user that an | |
| 75 | 1260 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or |
| 1261 * after a ":break". Handle a ">quit" debug command as if an | |
| 1262 * interrupt had occurred before the ":endwhile"/":endfor". That is, | |
| 1263 * throw an interrupt exception if appropriate. Doing this here | |
| 1264 * prevents that an exception for a parsing error is discarded when | |
| 1265 * throwing the interrupt exception later on. | |
| 7 | 1266 */ |
| 1267 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE | |
| 1268 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE) | |
| 1269 && dbg_check_skipped(eap)) | |
| 1270 (void)do_intthrow(cstack); | |
| 1271 | |
| 1272 /* | |
| 75 | 1273 * Set loop flag, so do_cmdline() will jump back to the matching |
| 1274 * ":while" or ":for". | |
| 7 | 1275 */ |
| 75 | 1276 cstack->cs_lflags |= CSL_HAD_ENDLOOP; |
| 7 | 1277 } |
| 1278 } | |
| 1279 | |
| 1280 | |
| 1281 /* | |
| 1282 * ":throw expr" | |
| 1283 */ | |
| 1284 void | |
|
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diff
changeset
|
1285 ex_throw(exarg_T *eap) |
| 7 | 1286 { |
| 1287 char_u *arg = eap->arg; | |
| 1288 char_u *value; | |
| 1289 | |
| 1290 if (*arg != NUL && *arg != '|' && *arg != '\n') | |
| 1291 value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip); | |
| 1292 else | |
| 1293 { | |
|
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|
1294 emsg(_(e_argreq)); |
| 7 | 1295 value = NULL; |
| 1296 } | |
| 1297 | |
| 1298 /* On error or when an exception is thrown during argument evaluation, do | |
| 1299 * not throw. */ | |
| 1300 if (!eap->skip && value != NULL) | |
| 1301 { | |
| 1302 if (throw_exception(value, ET_USER, NULL) == FAIL) | |
| 1303 vim_free(value); | |
| 1304 else | |
| 1305 do_throw(eap->cstack); | |
| 1306 } | |
| 1307 } | |
| 1308 | |
| 1309 /* | |
| 21 | 1310 * Throw the current exception through the specified cstack. Common routine |
| 1311 * for ":throw" (user exception) and error and interrupt exceptions. Also | |
| 1312 * used for rethrowing an uncaught exception. | |
| 7 | 1313 */ |
| 1314 void | |
|
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diff
changeset
|
1315 do_throw(struct condstack *cstack) |
| 7 | 1316 { |
| 1317 int idx; | |
| 1318 int inactivate_try = FALSE; | |
| 1319 | |
| 1320 /* | |
| 1321 * Cleanup and inactivate up to the next surrounding try conditional that | |
| 1322 * is not in its finally clause. Normally, do not inactivate the try | |
| 1323 * conditional itself, so that its ACTIVE flag can be tested below. But | |
| 1324 * if a previous error or interrupt has not been converted to an exception, | |
| 1325 * inactivate the try conditional, too, as if the conversion had been done, | |
| 21 | 1326 * and reset the did_emsg or got_int flag, so this won't happen again at |
| 1327 * the next surrounding try conditional. | |
| 7 | 1328 */ |
| 1880 | 1329 #ifndef THROW_ON_ERROR_TRUE |
| 7 | 1330 if (did_emsg && !THROW_ON_ERROR) |
| 1331 { | |
| 1332 inactivate_try = TRUE; | |
| 1333 did_emsg = FALSE; | |
| 1334 } | |
| 1880 | 1335 #endif |
| 1336 #ifndef THROW_ON_INTERRUPT_TRUE | |
| 7 | 1337 if (got_int && !THROW_ON_INTERRUPT) |
| 1338 { | |
| 1339 inactivate_try = TRUE; | |
| 1340 got_int = FALSE; | |
| 1341 } | |
| 1880 | 1342 #endif |
| 7 | 1343 idx = cleanup_conditionals(cstack, 0, inactivate_try); |
| 1344 if (idx >= 0) | |
| 1345 { | |
| 1346 /* | |
| 1347 * If this try conditional is active and we are before its first | |
| 21 | 1348 * ":catch", set THROWN so that the ":catch" commands will check |
| 1349 * whether the exception matches. When the exception came from any of | |
| 1350 * the catch clauses, it will be made pending at the ":finally" (if | |
| 1351 * present) and rethrown at the ":endtry". This will also happen if | |
| 1352 * the try conditional is inactive. This is the case when we are | |
| 1353 * throwing an exception due to an error or interrupt on the way from | |
| 1354 * a preceding ":continue", ":break", ":return", ":finish", error or | |
| 1355 * interrupt (not converted to an exception) to the finally clause or | |
| 1356 * from a preceding throw of a user or error or interrupt exception to | |
| 1357 * the matching catch clause or the finally clause. | |
| 7 | 1358 */ |
| 1359 if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1360 { | |
| 1361 if (cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 1362 cstack->cs_flags[idx] |= CSF_THROWN; | |
| 1363 else | |
| 1364 /* THROWN may have already been set for a catchable exception | |
| 1365 * that has been discarded. Ensure it is reset for the new | |
| 1366 * exception. */ | |
| 1367 cstack->cs_flags[idx] &= ~CSF_THROWN; | |
| 1368 } | |
| 1369 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 1370 cstack->cs_exception[idx] = current_exception; | |
| 1371 } | |
| 1372 #if 0 | |
| 21 | 1373 /* TODO: Add optimization below. Not yet done because of interface |
| 1374 * problems to eval.c and ex_cmds2.c. (Servatius) */ | |
| 7 | 1375 else |
| 1376 { | |
| 1377 /* | |
| 1378 * There are no catch clauses to check or finally clauses to execute. | |
| 1379 * End the current script or function. The exception will be rethrown | |
| 1380 * in the caller. | |
| 1381 */ | |
| 1382 if (getline_equal(eap->getline, eap->cookie, get_func_line)) | |
| 1383 current_funccal->returned = TRUE; | |
| 1384 elseif (eap->get_func_line == getsourceline) | |
| 1385 ((struct source_cookie *)eap->cookie)->finished = TRUE; | |
| 1386 } | |
| 1387 #endif | |
| 1388 | |
| 1389 did_throw = TRUE; | |
| 1390 } | |
| 1391 | |
| 1392 /* | |
| 1393 * ":try" | |
| 1394 */ | |
| 1395 void | |
|
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changeset
|
1396 ex_try(exarg_T *eap) |
| 7 | 1397 { |
| 1398 int skip; | |
| 1399 struct condstack *cstack = eap->cstack; | |
| 1400 | |
| 1401 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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1402 eap->errmsg = N_("E601: :try nesting too deep"); |
| 7 | 1403 else |
| 1404 { | |
| 1405 ++cstack->cs_idx; | |
| 1406 ++cstack->cs_trylevel; | |
| 1407 cstack->cs_flags[cstack->cs_idx] = CSF_TRY; | |
| 1408 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE; | |
| 1409 | |
| 1410 /* | |
| 1411 * Don't do something after an error, interrupt, or throw, or when there | |
| 1412 * is a surrounding conditional and it was not active. | |
| 1413 */ | |
| 1414 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1415 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1416 | |
| 1417 if (!skip) | |
| 1418 { | |
| 1419 /* Set ACTIVE and TRUE. TRUE means that the corresponding ":catch" | |
| 1420 * commands should check for a match if an exception is thrown and | |
| 1421 * that the finally clause needs to be executed. */ | |
| 1422 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE; | |
| 1423 | |
| 1424 /* | |
| 1425 * ":silent!", even when used in a try conditional, disables | |
| 1426 * displaying of error messages and conversion of errors to | |
| 1427 * exceptions. When the silent commands again open a try | |
| 1428 * conditional, save "emsg_silent" and reset it so that errors are | |
| 1429 * again converted to exceptions. The value is restored when that | |
| 1430 * try conditional is left. If it is left normally, the commands | |
| 1431 * following the ":endtry" are again silent. If it is left by | |
| 1432 * a ":continue", ":break", ":return", or ":finish", the commands | |
| 1433 * executed next are again silent. If it is left due to an | |
| 1434 * aborting error, an interrupt, or an exception, restoring | |
| 1435 * "emsg_silent" does not matter since we are already in the | |
| 1436 * aborting state and/or the exception has already been thrown. | |
| 1437 * The effect is then just freeing the memory that was allocated | |
| 1438 * to save the value. | |
| 1439 */ | |
| 1440 if (emsg_silent) | |
| 1441 { | |
| 1442 eslist_T *elem; | |
| 1443 | |
|
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1444 elem = ALLOC_ONE(struct eslist_elem); |
| 7 | 1445 if (elem == NULL) |
|
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1446 emsg(_(e_outofmem)); |
| 7 | 1447 else |
| 1448 { | |
| 1449 elem->saved_emsg_silent = emsg_silent; | |
| 1450 elem->next = cstack->cs_emsg_silent_list; | |
| 1451 cstack->cs_emsg_silent_list = elem; | |
| 1452 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT; | |
| 1453 emsg_silent = 0; | |
| 1454 } | |
| 1455 } | |
| 1456 } | |
| 1457 | |
| 1458 } | |
| 1459 } | |
| 1460 | |
| 1461 /* | |
| 1462 * ":catch /{pattern}/" and ":catch" | |
| 1463 */ | |
| 1464 void | |
|
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|
1465 ex_catch(exarg_T *eap) |
| 7 | 1466 { |
| 1467 int idx = 0; | |
| 1468 int give_up = FALSE; | |
| 1469 int skip = FALSE; | |
| 1470 int caught = FALSE; | |
| 1471 char_u *end; | |
| 1472 int save_char = 0; | |
| 1473 char_u *save_cpo; | |
| 1474 regmatch_T regmatch; | |
| 1475 int prev_got_int; | |
| 1476 struct condstack *cstack = eap->cstack; | |
| 1477 char_u *pat; | |
| 1478 | |
| 1479 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1480 { | |
|
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1481 eap->errmsg = N_("E603: :catch without :try"); |
| 7 | 1482 give_up = TRUE; |
| 1483 } | |
| 1484 else | |
| 1485 { | |
| 1486 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1487 { | |
| 1488 /* Report what's missing if the matching ":try" is not in its | |
| 1489 * finally clause. */ | |
| 75 | 1490 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1491 skip = TRUE; |
| 1492 } | |
| 1493 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1494 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1495 break; | |
| 1496 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1497 { | |
| 1498 /* Give up for a ":catch" after ":finally" and ignore it. | |
| 1499 * Just parse. */ | |
|
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1500 eap->errmsg = N_("E604: :catch after :finally"); |
| 7 | 1501 give_up = TRUE; |
| 1502 } | |
| 79 | 1503 else |
| 75 | 1504 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1505 &cstack->cs_looplevel); | |
| 7 | 1506 } |
| 1507 | |
| 1508 if (ends_excmd(*eap->arg)) /* no argument, catch all errors */ | |
| 1509 { | |
| 1510 pat = (char_u *)".*"; | |
| 1511 end = NULL; | |
| 1512 eap->nextcmd = find_nextcmd(eap->arg); | |
| 1513 } | |
| 1514 else | |
| 1515 { | |
| 1516 pat = eap->arg + 1; | |
| 1517 end = skip_regexp(pat, *eap->arg, TRUE, NULL); | |
| 1518 } | |
| 1519 | |
| 1520 if (!give_up) | |
| 1521 { | |
| 1522 /* | |
| 1523 * Don't do something when no exception has been thrown or when the | |
| 1524 * corresponding try block never got active (because of an inactive | |
| 1525 * surrounding conditional or after an error or interrupt or throw). | |
| 1526 */ | |
| 1527 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE)) | |
| 1528 skip = TRUE; | |
| 1529 | |
| 1530 /* | |
| 1531 * Check for a match only if an exception is thrown but not caught by | |
| 1532 * a previous ":catch". An exception that has replaced a discarded | |
| 1533 * exception is not checked (THROWN is not set then). | |
| 1534 */ | |
| 1535 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN) | |
| 1536 && !(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1537 { | |
| 1538 if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1))) | |
| 1539 { | |
|
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1540 emsg(_(e_trailing)); |
| 7 | 1541 return; |
| 1542 } | |
| 1543 | |
| 1544 /* When debugging or a breakpoint was encountered, display the | |
| 1545 * debug prompt (if not already done) before checking for a match. | |
| 1546 * This is a helpful hint for the user when the regular expression | |
| 1547 * matching fails. Handle a ">quit" debug command as if an | |
| 1548 * interrupt had occurred before the ":catch". That is, discard | |
| 1549 * the original exception, replace it by an interrupt exception, | |
| 1550 * and don't catch it in this try block. */ | |
| 1551 if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) | |
| 1552 { | |
| 1553 /* Terminate the pattern and avoid the 'l' flag in 'cpoptions' | |
| 1554 * while compiling it. */ | |
| 1555 if (end != NULL) | |
| 1556 { | |
| 1557 save_char = *end; | |
| 1558 *end = NUL; | |
| 1559 } | |
| 1560 save_cpo = p_cpo; | |
| 1561 p_cpo = (char_u *)""; | |
|
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|
1562 /* Disable error messages, it will make current_exception |
|
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|
1563 * invalid. */ |
|
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|
1564 ++emsg_off; |
| 1333 | 1565 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); |
|
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|
1566 --emsg_off; |
| 7 | 1567 regmatch.rm_ic = FALSE; |
| 1568 if (end != NULL) | |
| 1569 *end = save_char; | |
| 1570 p_cpo = save_cpo; | |
| 1571 if (regmatch.regprog == NULL) | |
|
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1572 semsg(_(e_invarg2), pat); |
| 7 | 1573 else |
| 1574 { | |
| 1575 /* | |
| 1576 * Save the value of got_int and reset it. We don't want | |
| 1577 * a previous interruption cancel matching, only hitting | |
| 1578 * CTRL-C while matching should abort it. | |
| 1579 */ | |
| 1580 prev_got_int = got_int; | |
| 1581 got_int = FALSE; | |
|
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1582 caught = vim_regexec_nl(®match, |
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|
1583 (char_u *)current_exception->value, (colnr_T)0); |
| 7 | 1584 got_int |= prev_got_int; |
|
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|
1585 vim_regfree(regmatch.regprog); |
| 7 | 1586 } |
| 1587 } | |
| 1588 } | |
| 1589 | |
| 1590 if (caught) | |
| 1591 { | |
| 1592 /* Make this ":catch" clause active and reset did_emsg, got_int, | |
| 1593 * and did_throw. Put the exception on the caught stack. */ | |
| 1594 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT; | |
| 1595 did_emsg = got_int = did_throw = FALSE; | |
| 1596 catch_exception((except_T *)cstack->cs_exception[idx]); | |
| 1597 /* It's mandatory that the current exception is stored in the cstack | |
| 1598 * so that it can be discarded at the next ":catch", ":finally", or | |
| 1599 * ":endtry" or when the catch clause is left by a ":continue", | |
| 1600 * ":break", ":return", ":finish", error, interrupt, or another | |
| 1601 * exception. */ | |
| 1602 if (cstack->cs_exception[cstack->cs_idx] != current_exception) | |
|
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changeset
|
1603 internal_error("ex_catch()"); |
| 7 | 1604 } |
| 1605 else | |
| 1606 { | |
| 1607 /* | |
| 1608 * If there is a preceding catch clause and it caught the exception, | |
| 1609 * finish the exception now. This happens also after errors except | |
| 1610 * when this ":catch" was after the ":finally" or not within | |
| 1611 * a ":try". Make the try conditional inactive so that the | |
| 1612 * following catch clauses are skipped. On an error or interrupt | |
| 1613 * after the preceding try block or catch clause was left by | |
| 1614 * a ":continue", ":break", ":return", or ":finish", discard the | |
| 1615 * pending action. | |
| 1616 */ | |
| 1617 cleanup_conditionals(cstack, CSF_TRY, TRUE); | |
| 1618 } | |
| 1619 } | |
| 1620 | |
| 1621 if (end != NULL) | |
| 1622 eap->nextcmd = find_nextcmd(end); | |
| 1623 } | |
| 1624 | |
| 1625 /* | |
| 1626 * ":finally" | |
| 1627 */ | |
| 1628 void | |
|
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1629 ex_finally(exarg_T *eap) |
| 7 | 1630 { |
| 1631 int idx; | |
| 1632 int skip = FALSE; | |
| 1633 int pending = CSTP_NONE; | |
| 1634 struct condstack *cstack = eap->cstack; | |
| 1635 | |
| 1636 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1637 eap->errmsg = N_("E606: :finally without :try"); |
| 7 | 1638 else |
| 1639 { | |
| 1640 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1641 { | |
| 75 | 1642 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1643 for (idx = cstack->cs_idx - 1; idx > 0; --idx) |
| 1644 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1645 break; | |
| 1646 /* Make this error pending, so that the commands in the following | |
| 1647 * finally clause can be executed. This overrules also a pending | |
| 1648 * ":continue", ":break", ":return", or ":finish". */ | |
| 1649 pending = CSTP_ERROR; | |
| 1650 } | |
| 1651 else | |
| 1652 idx = cstack->cs_idx; | |
| 1653 | |
| 1654 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1655 { | |
| 1656 /* Give up for a multiple ":finally" and ignore it. */ | |
|
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1657 eap->errmsg = N_("E607: multiple :finally"); |
| 7 | 1658 return; |
| 1659 } | |
| 79 | 1660 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 75 | 1661 &cstack->cs_looplevel); |
| 7 | 1662 |
| 1663 /* | |
| 1664 * Don't do something when the corresponding try block never got active | |
| 1665 * (because of an inactive surrounding conditional or after an error or | |
| 1666 * interrupt or throw) or for a ":finally" without ":try" or a multiple | |
| 1667 * ":finally". After every other error (did_emsg or the conditional | |
| 1668 * errors detected above) or after an interrupt (got_int) or an | |
| 1669 * exception (did_throw), the finally clause must be executed. | |
| 1670 */ | |
| 1671 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1672 | |
| 1673 if (!skip) | |
| 1674 { | |
| 1675 /* When debugging or a breakpoint was encountered, display the | |
| 1676 * debug prompt (if not already done). The user then knows that the | |
| 1677 * finally clause is executed. */ | |
| 1678 if (dbg_check_skipped(eap)) | |
| 1679 { | |
| 1680 /* Handle a ">quit" debug command as if an interrupt had | |
| 1681 * occurred before the ":finally". That is, discard the | |
| 1682 * original exception and replace it by an interrupt | |
| 1683 * exception. */ | |
| 1684 (void)do_intthrow(cstack); | |
| 1685 } | |
| 1686 | |
| 1687 /* | |
| 1688 * If there is a preceding catch clause and it caught the exception, | |
| 1689 * finish the exception now. This happens also after errors except | |
| 1690 * when this is a multiple ":finally" or one not within a ":try". | |
| 1691 * After an error or interrupt, this also discards a pending | |
| 1692 * ":continue", ":break", ":finish", or ":return" from the preceding | |
| 1693 * try block or catch clause. | |
| 1694 */ | |
| 1695 cleanup_conditionals(cstack, CSF_TRY, FALSE); | |
| 1696 | |
| 1697 /* | |
| 1698 * Make did_emsg, got_int, did_throw pending. If set, they overrule | |
| 1699 * a pending ":continue", ":break", ":return", or ":finish". Then | |
| 1700 * we have particularly to discard a pending return value (as done | |
| 1701 * by the call to cleanup_conditionals() above when did_emsg or | |
| 1702 * got_int is set). The pending values are restored by the | |
| 1703 * ":endtry", except if there is a new error, interrupt, exception, | |
| 1704 * ":continue", ":break", ":return", or ":finish" in the following | |
| 75 | 1705 * finally clause. A missing ":endwhile", ":endfor" or ":endif" |
| 1706 * detected here is treated as if did_emsg and did_throw had | |
| 1707 * already been set, respectively in case that the error is not | |
| 1708 * converted to an exception, did_throw had already been unset. | |
| 1709 * We must not set did_emsg here since that would suppress the | |
| 1710 * error message. | |
| 7 | 1711 */ |
| 1712 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) | |
| 1713 { | |
| 1714 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) | |
| 1715 { | |
| 1716 report_discard_pending(CSTP_RETURN, | |
| 68 | 1717 cstack->cs_rettv[cstack->cs_idx]); |
| 1718 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]); | |
| 7 | 1719 } |
| 1720 if (pending == CSTP_ERROR && !did_emsg) | |
| 1721 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0; | |
| 1722 else | |
| 1723 pending |= did_throw ? CSTP_THROW : 0; | |
| 1724 pending |= did_emsg ? CSTP_ERROR : 0; | |
| 1725 pending |= got_int ? CSTP_INTERRUPT : 0; | |
| 1726 cstack->cs_pending[cstack->cs_idx] = pending; | |
| 1727 | |
| 1728 /* It's mandatory that the current exception is stored in the | |
| 1729 * cstack so that it can be rethrown at the ":endtry" or be | |
| 1730 * discarded if the finally clause is left by a ":continue", | |
| 1731 * ":break", ":return", ":finish", error, interrupt, or another | |
| 1732 * exception. When emsg() is called for a missing ":endif" or | |
| 75 | 1733 * a missing ":endwhile"/":endfor" detected here, the |
| 1734 * exception will be discarded. */ | |
| 79 | 1735 if (did_throw && cstack->cs_exception[cstack->cs_idx] |
| 1736 != current_exception) | |
|
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|
1737 internal_error("ex_finally()"); |
| 7 | 1738 } |
| 1739 | |
| 1740 /* | |
| 75 | 1741 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg, |
| 22 | 1742 * got_int, and did_throw and make the finally clause active. |
| 1743 * This will happen after emsg() has been called for a missing | |
| 75 | 1744 * ":endif" or a missing ":endwhile"/":endfor" detected here, so |
| 1745 * that the following finally clause will be executed even then. | |
| 7 | 1746 */ |
| 75 | 1747 cstack->cs_lflags |= CSL_HAD_FINA; |
| 7 | 1748 } |
| 1749 } | |
| 1750 } | |
| 1751 | |
| 1752 /* | |
| 1753 * ":endtry" | |
| 1754 */ | |
| 1755 void | |
|
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|
1756 ex_endtry(exarg_T *eap) |
| 7 | 1757 { |
| 1758 int idx; | |
| 1759 int skip; | |
| 1760 int rethrow = FALSE; | |
| 1761 int pending = CSTP_NONE; | |
| 68 | 1762 void *rettv = NULL; |
| 7 | 1763 struct condstack *cstack = eap->cstack; |
| 1764 | |
| 1765 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1766 eap->errmsg = N_("E602: :endtry without :try"); |
| 7 | 1767 else |
| 1768 { | |
| 1769 /* | |
| 1770 * Don't do something after an error, interrupt or throw in the try | |
| 1771 * block, catch clause, or finally clause preceding this ":endtry" or | |
| 1772 * when an error or interrupt occurred after a ":continue", ":break", | |
| 1773 * ":return", or ":finish" in a try block or catch clause preceding this | |
| 1774 * ":endtry" or when the try block never got active (because of an | |
| 1775 * inactive surrounding conditional or after an error or interrupt or | |
| 1776 * throw) or when there is a surrounding conditional and it has been | |
| 1777 * made inactive by a ":continue", ":break", ":return", or ":finish" in | |
| 1778 * the finally clause. The latter case need not be tested since then | |
| 1779 * anything pending has already been discarded. */ | |
| 1780 skip = did_emsg || got_int || did_throw || | |
| 1781 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1782 | |
| 1783 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1784 { | |
| 75 | 1785 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1786 /* Find the matching ":try" and report what's missing. */ |
| 1787 idx = cstack->cs_idx; | |
| 1788 do | |
| 1789 --idx; | |
| 1790 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY)); | |
| 75 | 1791 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1792 &cstack->cs_looplevel); | |
| 7 | 1793 skip = TRUE; |
| 1794 | |
| 1795 /* | |
| 1796 * If an exception is being thrown, discard it to prevent it from | |
| 1797 * being rethrown at the end of this function. It would be | |
| 1798 * discarded by the error message, anyway. Resets did_throw. | |
| 1799 * This does not affect the script termination due to the error | |
| 1800 * since "trylevel" is decremented after emsg() has been called. | |
| 1801 */ | |
| 1802 if (did_throw) | |
| 1803 discard_current_exception(); | |
| 1804 } | |
| 1805 else | |
| 1806 { | |
| 1807 idx = cstack->cs_idx; | |
| 1808 | |
| 1809 /* | |
| 1810 * If we stopped with the exception currently being thrown at this | |
| 1811 * try conditional since we didn't know that it doesn't have | |
| 1812 * a finally clause, we need to rethrow it after closing the try | |
| 1813 * conditional. | |
| 1814 */ | |
| 1815 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE) | |
| 1816 && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1817 rethrow = TRUE; | |
| 1818 } | |
| 1819 | |
| 1820 /* If there was no finally clause, show the user when debugging or | |
| 1821 * a breakpoint was encountered that the end of the try conditional has | |
| 1822 * been reached: display the debug prompt (if not already done). Do | |
| 1823 * this on normal control flow or when an exception was thrown, but not | |
| 1824 * on an interrupt or error not converted to an exception or when | |
| 1825 * a ":break", ":continue", ":return", or ":finish" is pending. These | |
| 1826 * actions are carried out immediately. | |
| 1827 */ | |
| 1828 if ((rethrow || (!skip | |
| 1829 && !(cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1830 && !cstack->cs_pending[idx])) | |
| 1831 && dbg_check_skipped(eap)) | |
| 1832 { | |
| 1833 /* Handle a ">quit" debug command as if an interrupt had occurred | |
| 1834 * before the ":endtry". That is, throw an interrupt exception and | |
| 1835 * set "skip" and "rethrow". */ | |
| 1836 if (got_int) | |
| 1837 { | |
| 1838 skip = TRUE; | |
| 1839 (void)do_intthrow(cstack); | |
| 1840 /* The do_intthrow() call may have reset did_throw or | |
| 1841 * cstack->cs_pending[idx].*/ | |
| 1842 rethrow = FALSE; | |
| 1843 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1844 rethrow = TRUE; | |
| 1845 } | |
| 1846 } | |
| 1847 | |
| 1848 /* | |
| 1849 * If a ":return" is pending, we need to resume it after closing the | |
| 1850 * try conditional; remember the return value. If there was a finally | |
| 1851 * clause making an exception pending, we need to rethrow it. Make it | |
| 1852 * the exception currently being thrown. | |
| 1853 */ | |
| 1854 if (!skip) | |
| 1855 { | |
| 1856 pending = cstack->cs_pending[idx]; | |
| 1857 cstack->cs_pending[idx] = CSTP_NONE; | |
| 1858 if (pending == CSTP_RETURN) | |
| 68 | 1859 rettv = cstack->cs_rettv[idx]; |
| 7 | 1860 else if (pending & CSTP_THROW) |
| 1861 current_exception = cstack->cs_exception[idx]; | |
| 1862 } | |
| 1863 | |
| 1864 /* | |
| 1865 * Discard anything pending on an error, interrupt, or throw in the | |
| 1866 * finally clause. If there was no ":finally", discard a pending | |
| 1867 * ":continue", ":break", ":return", or ":finish" if an error or | |
| 1868 * interrupt occurred afterwards, but before the ":endtry" was reached. | |
| 1869 * If an exception was caught by the last of the catch clauses and there | |
| 1870 * was no finally clause, finish the exception now. This happens also | |
| 1871 * after errors except when this ":endtry" is not within a ":try". | |
| 1872 * Restore "emsg_silent" if it has been reset by this try conditional. | |
| 1873 */ | |
| 840 | 1874 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE); |
| 7 | 1875 |
| 1876 --cstack->cs_idx; | |
| 1877 --cstack->cs_trylevel; | |
| 1878 | |
| 1879 if (!skip) | |
| 1880 { | |
| 1881 report_resume_pending(pending, | |
| 68 | 1882 (pending == CSTP_RETURN) ? rettv : |
| 7 | 1883 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 1884 switch (pending) | |
| 1885 { | |
| 1886 case CSTP_NONE: | |
| 1887 break; | |
| 1888 | |
| 1889 /* Reactivate a pending ":continue", ":break", ":return", | |
| 1890 * ":finish" from the try block or a catch clause of this try | |
| 1891 * conditional. This is skipped, if there was an error in an | |
| 1892 * (unskipped) conditional command or an interrupt afterwards | |
| 1893 * or if the finally clause is present and executed a new error, | |
| 1894 * interrupt, throw, ":continue", ":break", ":return", or | |
| 1895 * ":finish". */ | |
| 1896 case CSTP_CONTINUE: | |
| 1897 ex_continue(eap); | |
| 1898 break; | |
| 1899 case CSTP_BREAK: | |
| 1900 ex_break(eap); | |
| 1901 break; | |
| 1902 case CSTP_RETURN: | |
| 68 | 1903 do_return(eap, FALSE, FALSE, rettv); |
| 7 | 1904 break; |
| 1905 case CSTP_FINISH: | |
| 1906 do_finish(eap, FALSE); | |
| 1907 break; | |
| 1908 | |
| 1909 /* When the finally clause was entered due to an error, | |
| 1910 * interrupt or throw (as opposed to a ":continue", ":break", | |
| 1911 * ":return", or ":finish"), restore the pending values of | |
| 1912 * did_emsg, got_int, and did_throw. This is skipped, if there | |
| 1913 * was a new error, interrupt, throw, ":continue", ":break", | |
| 1914 * ":return", or ":finish". in the finally clause. */ | |
| 1915 default: | |
| 1916 if (pending & CSTP_ERROR) | |
| 1917 did_emsg = TRUE; | |
| 1918 if (pending & CSTP_INTERRUPT) | |
| 1919 got_int = TRUE; | |
| 1920 if (pending & CSTP_THROW) | |
| 1921 rethrow = TRUE; | |
| 1922 break; | |
| 1923 } | |
| 1924 } | |
| 1925 | |
| 1926 if (rethrow) | |
| 1927 /* Rethrow the current exception (within this cstack). */ | |
| 1928 do_throw(cstack); | |
| 1929 } | |
| 1930 } | |
| 1931 | |
| 1932 /* | |
| 36 | 1933 * enter_cleanup() and leave_cleanup() |
| 1934 * | |
| 1935 * Functions to be called before/after invoking a sequence of autocommands for | |
| 1936 * cleanup for a failed command. (Failure means here that a call to emsg() | |
| 1937 * has been made, an interrupt occurred, or there is an uncaught exception | |
| 1938 * from a previous autocommand execution of the same command.) | |
| 24 | 1939 * |
| 36 | 1940 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same |
| 1941 * pointer to leave_cleanup(). The cleanup_T structure stores the pending | |
| 1942 * error/interrupt/exception state. | |
| 1943 */ | |
| 1944 | |
| 1945 /* | |
| 1946 * This function works a bit like ex_finally() except that there was not | |
| 1947 * actually an extra try block around the part that failed and an error or | |
| 1948 * interrupt has not (yet) been converted to an exception. This function | |
| 1949 * saves the error/interrupt/ exception state and prepares for the call to | |
| 1950 * do_cmdline() that is going to be made for the cleanup autocommand | |
| 1951 * execution. | |
| 24 | 1952 */ |
| 1953 void | |
|
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1954 enter_cleanup(cleanup_T *csp) |
| 24 | 1955 { |
| 1956 int pending = CSTP_NONE; | |
| 1957 | |
| 1958 /* | |
| 1959 * Postpone did_emsg, got_int, did_throw. The pending values will be | |
| 1960 * restored by leave_cleanup() except if there was an aborting error, | |
| 1961 * interrupt, or uncaught exception after this function ends. | |
| 1962 */ | |
| 1963 if (did_emsg || got_int || did_throw || need_rethrow) | |
| 1964 { | |
| 1965 csp->pending = (did_emsg ? CSTP_ERROR : 0) | |
| 1966 | (got_int ? CSTP_INTERRUPT : 0) | |
| 1967 | (did_throw ? CSTP_THROW : 0) | |
| 1968 | (need_rethrow ? CSTP_THROW : 0); | |
| 1969 | |
| 1970 /* If we are currently throwing an exception (did_throw), save it as | |
| 1971 * well. On an error not yet converted to an exception, update | |
| 1972 * "force_abort" and reset "cause_abort" (as do_errthrow() would do). | |
| 1973 * This is needed for the do_cmdline() call that is going to be made | |
| 1974 * for autocommand execution. We need not save *msg_list because | |
| 1975 * there is an extra instance for every call of do_cmdline(), anyway. | |
| 1976 */ | |
| 1977 if (did_throw || need_rethrow) | |
|
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1978 { |
| 24 | 1979 csp->exception = current_exception; |
|
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1980 current_exception = NULL; |
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1981 } |
| 24 | 1982 else |
| 1983 { | |
| 1984 csp->exception = NULL; | |
| 1985 if (did_emsg) | |
| 1986 { | |
| 1987 force_abort |= cause_abort; | |
| 1988 cause_abort = FALSE; | |
| 1989 } | |
| 1990 } | |
| 1991 did_emsg = got_int = did_throw = need_rethrow = FALSE; | |
| 1992 | |
| 1993 /* Report if required by the 'verbose' option or when debugging. */ | |
| 1994 report_make_pending(pending, csp->exception); | |
| 1995 } | |
| 1996 else | |
| 1997 { | |
| 1998 csp->pending = CSTP_NONE; | |
| 1999 csp->exception = NULL; | |
| 2000 } | |
| 2001 } | |
| 2002 | |
| 2003 /* | |
| 36 | 2004 * See comment above enter_cleanup() for how this function is used. |
| 2005 * | |
| 2006 * This function is a bit like ex_endtry() except that there was not actually | |
| 2007 * an extra try block around the part that failed and an error or interrupt | |
| 2008 * had not (yet) been converted to an exception when the cleanup autocommand | |
| 2009 * sequence was invoked. | |
| 2010 * | |
| 2011 * This function has to be called with the address of the cleanup_T structure | |
| 2012 * filled by enter_cleanup() as an argument; it restores the error/interrupt/ | |
| 2013 * exception state saved by that function - except there was an aborting | |
| 2014 * error, an interrupt or an uncaught exception during execution of the | |
| 2015 * cleanup autocommands. In the latter case, the saved error/interrupt/ | |
| 2016 * exception state is discarded. | |
| 24 | 2017 */ |
| 2018 void | |
|
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2019 leave_cleanup(cleanup_T *csp) |
| 24 | 2020 { |
| 2021 int pending = csp->pending; | |
| 2022 | |
| 2023 if (pending == CSTP_NONE) /* nothing to do */ | |
| 2024 return; | |
| 2025 | |
| 2026 /* If there was an aborting error, an interrupt, or an uncaught exception | |
| 2027 * after the corresponding call to enter_cleanup(), discard what has been | |
| 2028 * made pending by it. Report this to the user if required by the | |
| 2029 * 'verbose' option or when debugging. */ | |
| 2030 if (aborting() || need_rethrow) | |
| 2031 { | |
| 2032 if (pending & CSTP_THROW) | |
| 2033 /* Cancel the pending exception (includes report). */ | |
| 2034 discard_exception((except_T *)csp->exception, FALSE); | |
| 2035 else | |
| 2036 report_discard_pending(pending, NULL); | |
| 2037 | |
| 2038 /* If an error was about to be converted to an exception when | |
| 2039 * enter_cleanup() was called, free the message list. */ | |
| 1046 | 2040 if (msg_list != NULL) |
| 5517 | 2041 free_global_msglist(); |
| 24 | 2042 } |
| 2043 | |
| 2044 /* | |
| 2045 * If there was no new error, interrupt, or throw between the calls | |
| 2046 * to enter_cleanup() and leave_cleanup(), restore the pending | |
| 2047 * error/interrupt/exception state. | |
| 2048 */ | |
| 2049 else | |
| 2050 { | |
| 2051 /* | |
| 2052 * If there was an exception being thrown when enter_cleanup() was | |
| 2053 * called, we need to rethrow it. Make it the exception currently | |
| 2054 * being thrown. | |
| 2055 */ | |
| 2056 if (pending & CSTP_THROW) | |
| 2057 current_exception = csp->exception; | |
| 2058 | |
| 2059 /* | |
| 2060 * If an error was about to be converted to an exception when | |
| 2061 * enter_cleanup() was called, let "cause_abort" take the part of | |
| 2062 * "force_abort" (as done by cause_errthrow()). | |
| 2063 */ | |
| 2064 else if (pending & CSTP_ERROR) | |
| 2065 { | |
| 2066 cause_abort = force_abort; | |
| 2067 force_abort = FALSE; | |
| 2068 } | |
| 2069 | |
| 2070 /* | |
| 2071 * Restore the pending values of did_emsg, got_int, and did_throw. | |
| 2072 */ | |
| 2073 if (pending & CSTP_ERROR) | |
| 2074 did_emsg = TRUE; | |
| 2075 if (pending & CSTP_INTERRUPT) | |
| 2076 got_int = TRUE; | |
| 2077 if (pending & CSTP_THROW) | |
| 2078 need_rethrow = TRUE; /* did_throw will be set by do_one_cmd() */ | |
| 2079 | |
| 2080 /* Report if required by the 'verbose' option or when debugging. */ | |
| 2081 report_resume_pending(pending, | |
| 36 | 2082 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 24 | 2083 } |
| 2084 } | |
| 2085 | |
| 2086 | |
| 2087 /* | |
| 7 | 2088 * Make conditionals inactive and discard what's pending in finally clauses |
| 2089 * until the conditional type searched for or a try conditional not in its | |
| 79 | 2090 * finally clause is reached. If this is in an active catch clause, finish |
| 2091 * the caught exception. | |
| 2092 * Return the cstack index where the search stopped. | |
| 75 | 2093 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0, |
| 2094 * the latter meaning the innermost try conditional not in its finally clause. | |
| 2095 * "inclusive" tells whether the conditional searched for should be made | |
| 4352 | 2096 * inactive itself (a try conditional not in its finally clause possibly find |
| 75 | 2097 * before is always made inactive). If "inclusive" is TRUE and |
| 2098 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of | |
| 2099 * "emsg_silent", if reset when the try conditional finally reached was | |
| 4352 | 2100 * entered, is restored (used by ex_endtry()). This is normally done only |
| 75 | 2101 * when such a try conditional is left. |
| 7 | 2102 */ |
| 2103 int | |
|
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2104 cleanup_conditionals( |
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2105 struct condstack *cstack, |
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2106 int searched_cond, |
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2107 int inclusive) |
| 7 | 2108 { |
| 2109 int idx; | |
| 2110 int stop = FALSE; | |
| 2111 | |
| 2112 for (idx = cstack->cs_idx; idx >= 0; --idx) | |
| 2113 { | |
| 2114 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 2115 { | |
| 2116 /* | |
| 2117 * Discard anything pending in a finally clause and continue the | |
| 2118 * search. There may also be a pending ":continue", ":break", | |
| 2119 * ":return", or ":finish" before the finally clause. We must not | |
| 2120 * discard it, unless an error or interrupt occurred afterwards. | |
| 2121 */ | |
| 359 | 2122 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) |
| 7 | 2123 { |
| 2124 switch (cstack->cs_pending[idx]) | |
| 2125 { | |
| 2126 case CSTP_NONE: | |
| 2127 break; | |
| 2128 | |
| 2129 case CSTP_CONTINUE: | |
| 2130 case CSTP_BREAK: | |
| 2131 case CSTP_FINISH: | |
| 2132 report_discard_pending(cstack->cs_pending[idx], NULL); | |
| 2133 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2134 break; | |
| 2135 | |
| 2136 case CSTP_RETURN: | |
| 2137 report_discard_pending(CSTP_RETURN, | |
| 68 | 2138 cstack->cs_rettv[idx]); |
| 2139 discard_pending_return(cstack->cs_rettv[idx]); | |
| 7 | 2140 cstack->cs_pending[idx] = CSTP_NONE; |
| 2141 break; | |
| 2142 | |
| 2143 default: | |
| 2144 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 2145 { | |
| 2146 if (cstack->cs_pending[idx] & CSTP_THROW) | |
| 2147 { | |
| 2148 /* Cancel the pending exception. This is in the | |
| 2149 * finally clause, so that the stack of the | |
| 2150 * caught exceptions is not involved. */ | |
| 2151 discard_exception((except_T *) | |
| 2152 cstack->cs_exception[idx], | |
| 2153 FALSE); | |
| 2154 } | |
| 2155 else | |
| 2156 report_discard_pending(cstack->cs_pending[idx], | |
| 2157 NULL); | |
| 2158 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2159 } | |
| 2160 break; | |
| 2161 } | |
| 2162 } | |
| 2163 | |
| 2164 /* | |
| 2165 * Stop at a try conditional not in its finally clause. If this try | |
| 2166 * conditional is in an active catch clause, finish the caught | |
| 2167 * exception. | |
| 2168 */ | |
| 2169 if (!(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 2170 { | |
| 2171 if ((cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 2172 && (cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 2173 finish_exception((except_T *)cstack->cs_exception[idx]); | |
| 2174 /* Stop at this try conditional - except the try block never | |
| 2175 * got active (because of an inactive surrounding conditional | |
| 2176 * or when the ":try" appeared after an error or interrupt or | |
| 2177 * throw). */ | |
| 2178 if (cstack->cs_flags[idx] & CSF_TRUE) | |
| 2179 { | |
| 2180 if (searched_cond == 0 && !inclusive) | |
| 2181 break; | |
| 2182 stop = TRUE; | |
| 2183 } | |
| 2184 } | |
| 2185 } | |
| 2186 | |
| 2187 /* Stop on the searched conditional type (even when the surrounding | |
| 2188 * conditional is not active or something has been made pending). | |
| 2189 * If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT, | |
| 2190 * check first whether "emsg_silent" needs to be restored. */ | |
| 2191 if (cstack->cs_flags[idx] & searched_cond) | |
| 2192 { | |
| 2193 if (!inclusive) | |
| 2194 break; | |
| 2195 stop = TRUE; | |
| 2196 } | |
| 2197 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 2198 if (stop && searched_cond != (CSF_TRY | CSF_SILENT)) | |
| 2199 break; | |
| 2200 | |
| 2201 /* | |
| 1214 | 2202 * When leaving a try conditional that reset "emsg_silent" on its |
| 2203 * entry after saving the original value, restore that value here and | |
| 2204 * free the memory used to store it. | |
| 7 | 2205 */ |
| 2206 if ((cstack->cs_flags[idx] & CSF_TRY) | |
| 359 | 2207 && (cstack->cs_flags[idx] & CSF_SILENT)) |
| 7 | 2208 { |
| 2209 eslist_T *elem; | |
| 2210 | |
| 2211 elem = cstack->cs_emsg_silent_list; | |
| 2212 cstack->cs_emsg_silent_list = elem->next; | |
| 2213 emsg_silent = elem->saved_emsg_silent; | |
| 2214 vim_free(elem); | |
| 2215 cstack->cs_flags[idx] &= ~CSF_SILENT; | |
| 2216 } | |
| 2217 if (stop) | |
| 2218 break; | |
| 2219 } | |
| 2220 return idx; | |
| 2221 } | |
| 2222 | |
| 2223 /* | |
| 75 | 2224 * Return an appropriate error message for a missing endwhile/endfor/endif. |
| 2225 */ | |
|
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2226 static char * |
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2227 get_end_emsg(struct condstack *cstack) |
| 75 | 2228 { |
| 2229 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE) | |
| 2230 return e_endwhile; | |
| 2231 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) | |
| 2232 return e_endfor; | |
| 2233 return e_endif; | |
| 2234 } | |
| 2235 | |
| 2236 | |
| 2237 /* | |
| 7 | 2238 * Rewind conditionals until index "idx" is reached. "cond_type" and |
| 2239 * "cond_level" specify a conditional type and the address of a level variable | |
| 2240 * which is to be decremented with each skipped conditional of the specified | |
| 2241 * type. | |
| 79 | 2242 * Also free "for info" structures where needed. |
| 7 | 2243 */ |
| 79 | 2244 void |
|
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2245 rewind_conditionals( |
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f86adafb28d4
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2246 struct condstack *cstack, |
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2247 int idx, |
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2248 int cond_type, |
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f86adafb28d4
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parents:
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2249 int *cond_level) |
| 7 | 2250 { |
| 2251 while (cstack->cs_idx > idx) | |
| 2252 { | |
| 2253 if (cstack->cs_flags[cstack->cs_idx] & cond_type) | |
| 2254 --*cond_level; | |
| 79 | 2255 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
| 2256 free_for_info(cstack->cs_forinfo[cstack->cs_idx]); | |
| 7 | 2257 --cstack->cs_idx; |
| 2258 } | |
| 2259 } | |
| 2260 | |
| 2261 /* | |
| 2262 * ":endfunction" when not after a ":function" | |
| 2263 */ | |
| 2264 void | |
|
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2265 ex_endfunction(exarg_T *eap UNUSED) |
| 7 | 2266 { |
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2267 emsg(_("E193: :endfunction not inside a function")); |
| 7 | 2268 } |
| 2269 | |
| 2270 /* | |
| 75 | 2271 * Return TRUE if the string "p" looks like a ":while" or ":for" command. |
| 7 | 2272 */ |
| 2273 int | |
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2274 has_loop_cmd(char_u *p) |
| 7 | 2275 { |
| 1447 | 2276 int len; |
| 2277 | |
| 2278 /* skip modifiers, white space and ':' */ | |
| 2279 for (;;) | |
| 2280 { | |
| 2281 while (*p == ' ' || *p == '\t' || *p == ':') | |
| 2282 ++p; | |
| 2283 len = modifier_len(p); | |
| 2284 if (len == 0) | |
| 2285 break; | |
| 2286 p += len; | |
| 2287 } | |
| 75 | 2288 if ((p[0] == 'w' && p[1] == 'h') |
| 2289 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r')) | |
| 7 | 2290 return TRUE; |
| 2291 return FALSE; | |
| 2292 } | |
| 2293 | |
| 2294 #endif /* FEAT_EVAL */ |