Mercurial > vim
annotate src/ex_eval.c @ 5621:be61f315eafe v7.4.157
updated for version 7.4.157
Problem: Error number used twice. (Yukihiro Nakadaira)
Solution: Change the one not referred in the docs.
| author | Bram Moolenaar <bram@vim.org> |
|---|---|
| date | Thu, 23 Jan 2014 18:12:49 +0100 |
| parents | 064e2a080e2e |
| children | a1e71a01dbd6 |
| rev | line source |
|---|---|
| 7 | 1 /* vi:set ts=8 sts=4 sw=4: |
| 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 | |
| 18 static void free_msglist __ARGS((struct msglist *l)); | |
| 19 static int throw_exception __ARGS((void *, int, char_u *)); | |
| 75 | 20 static char_u *get_end_emsg __ARGS((struct condstack *cstack)); |
| 7 | 21 |
| 22 /* | |
| 23 * Exception handling terms: | |
| 24 * | |
| 25 * :try ":try" command \ | |
| 26 * ... try block | | |
| 27 * :catch RE ":catch" command | | |
| 28 * ... catch clause |- try conditional | |
| 29 * :finally ":finally" command | | |
| 30 * ... finally clause | | |
| 31 * :endtry ":endtry" command / | |
| 32 * | |
| 33 * The try conditional may have any number of catch clauses and at most one | |
| 34 * finally clause. A ":throw" command can be inside the try block, a catch | |
| 35 * clause, the finally clause, or in a function called or script sourced from | |
| 36 * there or even outside the try conditional. Try conditionals may be nested. | |
| 37 */ | |
| 38 | |
| 39 /* | |
| 40 * Configuration whether an exception is thrown on error or interrupt. When | |
| 41 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or | |
| 42 * interrupt (got_int) under an active try conditional terminates the script | |
| 43 * after the non-active finally clauses of all active try conditionals have been | |
| 44 * executed. Otherwise, errors and/or interrupts are converted into catchable | |
| 45 * exceptions (did_throw additionally set), which terminate the script only if | |
| 46 * not caught. For user exceptions, only did_throw is set. (Note: got_int can | |
| 4352 | 47 * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not |
| 7 | 48 * a reliant test that the exception currently being thrown is an interrupt |
| 49 * exception. Similarly, did_emsg can be set afterwards on an error in an | |
| 50 * (unskipped) conditional command inside an inactive conditional, so did_throw | |
| 51 * && did_emsg is not a reliant test that the exception currently being thrown | |
| 52 * is an error exception.) - The macros can be defined as expressions checking | |
| 53 * for a variable that is allowed to be changed during execution of a script. | |
| 54 */ | |
| 55 #if 0 | |
| 56 /* Expressions used for testing during the development phase. */ | |
| 57 # define THROW_ON_ERROR (!eval_to_number("$VIMNOERRTHROW")) | |
| 58 # define THROW_ON_INTERRUPT (!eval_to_number("$VIMNOINTTHROW")) | |
| 59 # define THROW_TEST | |
| 60 #else | |
| 61 /* Values used for the Vim release. */ | |
| 62 # define THROW_ON_ERROR TRUE | |
| 1880 | 63 # define THROW_ON_ERROR_TRUE |
| 7 | 64 # define THROW_ON_INTERRUPT TRUE |
| 1880 | 65 # define THROW_ON_INTERRUPT_TRUE |
| 7 | 66 #endif |
| 67 | |
| 68 static void catch_exception __ARGS((except_T *excp)); | |
| 69 static void finish_exception __ARGS((except_T *excp)); | |
| 70 static void discard_exception __ARGS((except_T *excp, int was_finished)); | |
| 71 static void report_pending __ARGS((int action, int pending, void *value)); | |
| 72 | |
| 73 /* | |
| 74 * When several errors appear in a row, setting "force_abort" is delayed until | |
| 75 * the failing command returned. "cause_abort" is set to TRUE meanwhile, in | |
| 76 * order to indicate that situation. This is useful when "force_abort" was set | |
| 77 * during execution of a function call from an expression: the aborting of the | |
| 78 * expression evaluation is done without producing any error messages, but all | |
| 79 * error messages on parsing errors during the expression evaluation are given | |
| 80 * (even if a try conditional is active). | |
| 81 */ | |
| 82 static int cause_abort = FALSE; | |
| 83 | |
| 84 /* | |
| 1214 | 85 * Return TRUE when immediately aborting on error, or when an interrupt |
| 7 | 86 * occurred or an exception was thrown but not caught. Use for ":{range}call" |
| 87 * to check whether an aborted function that does not handle a range itself | |
| 88 * should be called again for the next line in the range. Also used for | |
| 89 * cancelling expression evaluation after a function call caused an immediate | |
| 90 * abort. Note that the first emsg() call temporarily resets "force_abort" | |
| 91 * until the throw point for error messages has been reached. That is, during | |
| 92 * cancellation of an expression evaluation after an aborting function call or | |
| 93 * due to a parsing error, aborting() always returns the same value. | |
| 94 */ | |
| 95 int | |
| 96 aborting() | |
| 97 { | |
| 98 return (did_emsg && force_abort) || got_int || did_throw; | |
| 99 } | |
| 100 | |
| 101 /* | |
| 102 * The value of "force_abort" is temporarily reset by the first emsg() call | |
| 103 * during an expression evaluation, and "cause_abort" is used instead. It might | |
| 104 * be necessary to restore "force_abort" even before the throw point for the | |
| 105 * error message has been reached. update_force_abort() should be called then. | |
| 106 */ | |
| 107 void | |
| 108 update_force_abort() | |
| 109 { | |
| 110 if (cause_abort) | |
| 111 force_abort = TRUE; | |
| 112 } | |
| 113 | |
| 114 /* | |
| 115 * Return TRUE if a command with a subcommand resulting in "retcode" should | |
| 116 * abort the script processing. Can be used to suppress an autocommand after | |
| 117 * execution of a failing subcommand as long as the error message has not been | |
| 118 * displayed and actually caused the abortion. | |
| 119 */ | |
| 120 int | |
| 121 should_abort(retcode) | |
| 122 int retcode; | |
| 123 { | |
| 124 return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting()); | |
| 125 } | |
| 126 | |
| 127 /* | |
| 128 * Return TRUE if a function with the "abort" flag should not be considered | |
| 129 * ended on an error. This means that parsing commands is continued in order | |
| 130 * to find finally clauses to be executed, and that some errors in skipped | |
| 131 * commands are still reported. | |
| 132 */ | |
| 133 int | |
| 134 aborted_in_try() | |
| 135 { | |
| 136 /* This function is only called after an error. In this case, "force_abort" | |
| 137 * determines whether searching for finally clauses is necessary. */ | |
| 138 return force_abort; | |
| 139 } | |
| 140 | |
| 141 /* | |
| 142 * cause_errthrow(): Cause a throw of an error exception if appropriate. | |
| 143 * Return TRUE if the error message should not be displayed by emsg(). | |
| 144 * Sets "ignore", if the emsg() call should be ignored completely. | |
| 145 * | |
| 146 * When several messages appear in the same command, the first is usually the | |
| 147 * most specific one and used as the exception value. The "severe" flag can be | |
| 148 * set to TRUE, if a later but severer message should be used instead. | |
| 149 */ | |
| 150 int | |
| 151 cause_errthrow(mesg, severe, ignore) | |
| 152 char_u *mesg; | |
| 153 int severe; | |
| 154 int *ignore; | |
| 155 { | |
| 156 struct msglist *elem; | |
| 157 struct msglist **plist; | |
| 158 | |
| 159 /* | |
| 839 | 160 * Do nothing when displaying the interrupt message or reporting an |
| 161 * uncaught exception (which has already been discarded then) at the top | |
| 162 * level. Also when no exception can be thrown. The message will be | |
| 163 * displayed by emsg(). | |
| 7 | 164 */ |
| 165 if (suppress_errthrow) | |
| 166 return FALSE; | |
| 167 | |
| 168 /* | |
| 839 | 169 * If emsg() has not been called previously, temporarily reset |
| 170 * "force_abort" until the throw point for error messages has been | |
| 171 * reached. This ensures that aborting() returns the same value for all | |
| 172 * errors that appear in the same command. This means particularly that | |
| 173 * for parsing errors during expression evaluation emsg() will be called | |
| 174 * multiply, even when the expression is evaluated from a finally clause | |
| 175 * that was activated due to an aborting error, interrupt, or exception. | |
| 7 | 176 */ |
| 177 if (!did_emsg) | |
| 178 { | |
| 179 cause_abort = force_abort; | |
| 180 force_abort = FALSE; | |
| 181 } | |
| 182 | |
| 183 /* | |
| 184 * If no try conditional is active and no exception is being thrown and | |
| 185 * there has not been an error in a try conditional or a throw so far, do | |
| 839 | 186 * nothing (for compatibility of non-EH scripts). The message will then |
| 187 * be displayed by emsg(). When ":silent!" was used and we are not | |
| 188 * currently throwing an exception, do nothing. The message text will | |
| 189 * then be stored to v:errmsg by emsg() without displaying it. | |
| 7 | 190 */ |
| 191 if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw) | |
| 192 return FALSE; | |
| 193 | |
| 194 /* | |
| 195 * Ignore an interrupt message when inside a try conditional or when an | |
| 839 | 196 * exception is being thrown or when an error in a try conditional or |
| 197 * throw has been detected previously. This is important in order that an | |
| 7 | 198 * interrupt exception is catchable by the innermost try conditional and |
| 199 * not replaced by an interrupt message error exception. | |
| 200 */ | |
| 201 if (mesg == (char_u *)_(e_interr)) | |
| 202 { | |
| 203 *ignore = TRUE; | |
| 204 return TRUE; | |
| 205 } | |
| 206 | |
| 207 /* | |
| 208 * Ensure that all commands in nested function calls and sourced files | |
| 209 * are aborted immediately. | |
| 210 */ | |
| 211 cause_abort = TRUE; | |
| 212 | |
| 213 /* | |
| 214 * When an exception is being thrown, some commands (like conditionals) are | |
| 215 * not skipped. Errors in those commands may affect what of the subsequent | |
| 216 * commands are regarded part of catch and finally clauses. Catching the | |
| 217 * exception would then cause execution of commands not intended by the | |
| 218 * user, who wouldn't even get aware of the problem. Therefor, discard the | |
| 219 * exception currently being thrown to prevent it from being caught. Just | |
| 220 * execute finally clauses and terminate. | |
| 221 */ | |
| 222 if (did_throw) | |
| 223 { | |
| 224 /* When discarding an interrupt exception, reset got_int to prevent the | |
| 225 * same interrupt being converted to an exception again and discarding | |
| 226 * the error exception we are about to throw here. */ | |
| 227 if (current_exception->type == ET_INTERRUPT) | |
| 228 got_int = FALSE; | |
| 229 discard_current_exception(); | |
| 230 } | |
| 231 | |
| 232 #ifdef THROW_TEST | |
| 233 if (!THROW_ON_ERROR) | |
| 234 { | |
| 235 /* | |
| 236 * Print error message immediately without searching for a matching | |
| 237 * catch clause; just finally clauses are executed before the script | |
| 238 * is terminated. | |
| 239 */ | |
| 240 return FALSE; | |
| 241 } | |
| 242 else | |
| 243 #endif | |
| 244 { | |
| 245 /* | |
| 246 * Prepare the throw of an error exception, so that everything will | |
| 247 * be aborted (except for executing finally clauses), until the error | |
| 248 * exception is caught; if still uncaught at the top level, the error | |
| 249 * message will be displayed and the script processing terminated | |
| 250 * then. - This function has no access to the conditional stack. | |
| 251 * Thus, the actual throw is made after the failing command has | |
| 252 * returned. - Throw only the first of several errors in a row, except | |
| 253 * a severe error is following. | |
| 254 */ | |
| 255 if (msg_list != NULL) | |
| 256 { | |
| 257 plist = msg_list; | |
| 258 while (*plist != NULL) | |
| 259 plist = &(*plist)->next; | |
| 260 | |
| 261 elem = (struct msglist *)alloc((unsigned)sizeof(struct msglist)); | |
| 262 if (elem == NULL) | |
| 263 { | |
| 264 suppress_errthrow = TRUE; | |
| 265 EMSG(_(e_outofmem)); | |
| 266 } | |
| 267 else | |
| 268 { | |
| 269 elem->msg = vim_strsave(mesg); | |
| 270 if (elem->msg == NULL) | |
| 271 { | |
| 272 vim_free(elem); | |
| 273 suppress_errthrow = TRUE; | |
| 274 EMSG(_(e_outofmem)); | |
| 275 } | |
| 276 else | |
| 277 { | |
| 278 elem->next = NULL; | |
| 279 elem->throw_msg = NULL; | |
| 280 *plist = elem; | |
| 281 if (plist == msg_list || severe) | |
| 282 { | |
| 283 char_u *tmsg; | |
| 284 | |
| 285 /* Skip the extra "Vim " prefix for message "E458". */ | |
| 286 tmsg = elem->msg; | |
| 287 if (STRNCMP(tmsg, "Vim E", 5) == 0 | |
| 288 && VIM_ISDIGIT(tmsg[5]) | |
| 289 && VIM_ISDIGIT(tmsg[6]) | |
| 290 && VIM_ISDIGIT(tmsg[7]) | |
| 291 && tmsg[8] == ':' | |
| 292 && tmsg[9] == ' ') | |
| 293 (*msg_list)->throw_msg = &tmsg[4]; | |
| 294 else | |
| 295 (*msg_list)->throw_msg = tmsg; | |
| 296 } | |
| 297 } | |
| 298 } | |
| 299 } | |
| 300 return TRUE; | |
| 301 } | |
| 302 } | |
| 303 | |
| 304 /* | |
| 305 * Free a "msg_list" and the messages it contains. | |
| 306 */ | |
| 307 static void | |
| 308 free_msglist(l) | |
| 309 struct msglist *l; | |
| 310 { | |
| 311 struct msglist *messages, *next; | |
| 312 | |
| 313 messages = l; | |
| 314 while (messages != NULL) | |
| 315 { | |
| 316 next = messages->next; | |
| 317 vim_free(messages->msg); | |
| 318 vim_free(messages); | |
| 319 messages = next; | |
| 320 } | |
| 321 } | |
| 322 | |
| 323 /* | |
| 5517 | 324 * Free global "*msg_list" and the messages it contains, then set "*msg_list" |
| 325 * to NULL. | |
| 326 */ | |
| 327 void | |
| 328 free_global_msglist() | |
| 329 { | |
| 330 free_msglist(*msg_list); | |
| 331 *msg_list = NULL; | |
| 332 } | |
| 333 | |
| 334 /* | |
| 7 | 335 * Throw the message specified in the call to cause_errthrow() above as an |
| 336 * error exception. If cstack is NULL, postpone the throw until do_cmdline() | |
| 337 * has returned (see do_one_cmd()). | |
| 338 */ | |
| 339 void | |
| 340 do_errthrow(cstack, cmdname) | |
| 341 struct condstack *cstack; | |
| 342 char_u *cmdname; | |
| 343 { | |
| 344 /* | |
| 345 * Ensure that all commands in nested function calls and sourced files | |
| 346 * are aborted immediately. | |
| 347 */ | |
| 348 if (cause_abort) | |
| 349 { | |
| 350 cause_abort = FALSE; | |
| 351 force_abort = TRUE; | |
| 352 } | |
| 353 | |
| 354 /* If no exception is to be thrown or the conversion should be done after | |
| 355 * returning to a previous invocation of do_one_cmd(), do nothing. */ | |
| 1046 | 356 if (msg_list == NULL || *msg_list == NULL) |
| 7 | 357 return; |
| 358 | |
| 359 if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL) | |
| 360 free_msglist(*msg_list); | |
| 361 else | |
| 362 { | |
| 363 if (cstack != NULL) | |
| 364 do_throw(cstack); | |
| 365 else | |
| 366 need_rethrow = TRUE; | |
| 367 } | |
| 368 *msg_list = NULL; | |
| 369 } | |
| 370 | |
| 371 /* | |
| 372 * do_intthrow(): Replace the current exception by an interrupt or interrupt | |
| 373 * exception if appropriate. Return TRUE if the current exception is discarded, | |
| 374 * FALSE otherwise. | |
| 375 */ | |
| 376 int | |
| 377 do_intthrow(cstack) | |
| 378 struct condstack *cstack; | |
| 379 { | |
| 380 /* | |
| 381 * If no interrupt occurred or no try conditional is active and no exception | |
| 382 * is being thrown, do nothing (for compatibility of non-EH scripts). | |
| 383 */ | |
| 384 if (!got_int || (trylevel == 0 && !did_throw)) | |
| 385 return FALSE; | |
| 386 | |
| 387 #ifdef THROW_TEST /* avoid warning for condition always true */ | |
| 388 if (!THROW_ON_INTERRUPT) | |
| 389 { | |
| 390 /* | |
| 391 * The interrupt aborts everything except for executing finally clauses. | |
| 392 * Discard any user or error or interrupt exception currently being | |
| 393 * thrown. | |
| 394 */ | |
| 395 if (did_throw) | |
| 396 discard_current_exception(); | |
| 397 } | |
| 398 else | |
| 399 #endif | |
| 400 { | |
| 401 /* | |
| 402 * Throw an interrupt exception, so that everything will be aborted | |
| 403 * (except for executing finally clauses), until the interrupt exception | |
| 404 * is caught; if still uncaught at the top level, the script processing | |
| 405 * will be terminated then. - If an interrupt exception is already | |
| 406 * being thrown, do nothing. | |
| 407 * | |
| 408 */ | |
| 409 if (did_throw) | |
| 410 { | |
| 411 if (current_exception->type == ET_INTERRUPT) | |
| 412 return FALSE; | |
| 413 | |
| 414 /* An interrupt exception replaces any user or error exception. */ | |
| 415 discard_current_exception(); | |
| 416 } | |
| 417 if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL) | |
| 418 do_throw(cstack); | |
| 419 } | |
| 420 | |
| 421 return TRUE; | |
| 422 } | |
| 423 | |
| 424 /* | |
| 5517 | 425 * Get an exception message that is to be stored in current_exception->value. |
| 7 | 426 */ |
| 5517 | 427 char_u * |
| 428 get_exception_string(value, type, cmdname, should_free) | |
| 7 | 429 void *value; |
| 430 int type; | |
| 431 char_u *cmdname; | |
| 5517 | 432 int *should_free; |
| 7 | 433 { |
| 5517 | 434 char_u *ret, *mesg; |
| 7 | 435 int cmdlen; |
| 5517 | 436 char_u *p, *val; |
| 7 | 437 |
| 438 if (type == ET_ERROR) | |
| 439 { | |
| 5517 | 440 *should_free = FALSE; |
| 441 mesg = ((struct msglist *)value)->throw_msg; | |
| 7 | 442 if (cmdname != NULL && *cmdname != NUL) |
| 443 { | |
| 835 | 444 cmdlen = (int)STRLEN(cmdname); |
| 5517 | 445 ret = vim_strnsave((char_u *)"Vim(", |
| 7 | 446 4 + cmdlen + 2 + (int)STRLEN(mesg)); |
| 5517 | 447 if (ret == NULL) |
| 448 return ret; | |
| 449 STRCPY(&ret[4], cmdname); | |
| 450 STRCPY(&ret[4 + cmdlen], "):"); | |
| 451 val = ret + 4 + cmdlen + 2; | |
| 7 | 452 } |
| 453 else | |
| 454 { | |
| 5517 | 455 ret = vim_strnsave((char_u *)"Vim:", 4 + (int)STRLEN(mesg)); |
| 456 if (ret == NULL) | |
| 457 return ret; | |
| 458 val = ret + 4; | |
| 7 | 459 } |
| 460 | |
| 461 /* msg_add_fname may have been used to prefix the message with a file | |
| 462 * name in quotes. In the exception value, put the file name in | |
| 463 * parentheses and move it to the end. */ | |
| 464 for (p = mesg; ; p++) | |
| 465 { | |
| 466 if (*p == NUL | |
| 467 || (*p == 'E' | |
| 468 && VIM_ISDIGIT(p[1]) | |
| 469 && (p[2] == ':' | |
| 470 || (VIM_ISDIGIT(p[2]) | |
| 471 && (p[3] == ':' | |
| 472 || (VIM_ISDIGIT(p[3]) | |
| 473 && p[4] == ':')))))) | |
| 474 { | |
| 273 | 475 if (*p == NUL || p == mesg) |
| 476 STRCAT(val, mesg); /* 'E123' missing or at beginning */ | |
| 7 | 477 else |
| 478 { | |
| 479 /* '"filename" E123: message text' */ | |
| 480 if (mesg[0] != '"' || p-2 < &mesg[1] || | |
| 481 p[-2] != '"' || p[-1] != ' ') | |
| 482 /* "E123:" is part of the file name. */ | |
| 483 continue; | |
| 484 | |
| 485 STRCAT(val, p); | |
| 486 p[-2] = NUL; | |
| 487 sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]); | |
| 488 p[-2] = '"'; | |
| 489 } | |
| 490 break; | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 else | |
| 5517 | 495 { |
| 496 *should_free = FALSE; | |
| 497 ret = (char_u *) value; | |
| 498 } | |
| 499 | |
| 500 return ret; | |
| 501 } | |
| 502 | |
| 503 | |
| 504 /* | |
| 505 * Throw a new exception. Return FAIL when out of memory or it was tried to | |
| 506 * throw an illegal user exception. "value" is the exception string for a | |
| 507 * user or interrupt exception, or points to a message list in case of an | |
| 508 * error exception. | |
| 509 */ | |
| 510 static int | |
| 511 throw_exception(value, type, cmdname) | |
| 512 void *value; | |
| 513 int type; | |
| 514 char_u *cmdname; | |
| 515 { | |
| 516 except_T *excp; | |
| 517 int should_free; | |
| 518 | |
| 519 /* | |
| 520 * Disallow faking Interrupt or error exceptions as user exceptions. They | |
| 521 * would be treated differently from real interrupt or error exceptions | |
| 522 * when no active try block is found, see do_cmdline(). | |
| 523 */ | |
| 524 if (type == ET_USER) | |
| 525 { | |
| 526 if (STRNCMP((char_u *)value, "Vim", 3) == 0 | |
| 527 && (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':' | |
| 528 || ((char_u *)value)[3] == '(')) | |
| 529 { | |
| 530 EMSG(_("E608: Cannot :throw exceptions with 'Vim' prefix")); | |
| 531 goto fail; | |
| 532 } | |
| 533 } | |
| 534 | |
| 535 excp = (except_T *)alloc((unsigned)sizeof(except_T)); | |
| 536 if (excp == NULL) | |
| 537 goto nomem; | |
| 538 | |
| 539 if (type == ET_ERROR) | |
| 540 /* Store the original message and prefix the exception value with | |
| 541 * "Vim:" or, if a command name is given, "Vim(cmdname):". */ | |
| 542 excp->messages = (struct msglist *)value; | |
| 543 | |
| 544 excp->value = get_exception_string(value, type, cmdname, &should_free); | |
| 545 if (excp->value == NULL && should_free) | |
| 546 goto nomem; | |
| 7 | 547 |
| 548 excp->type = type; | |
| 549 excp->throw_name = vim_strsave(sourcing_name == NULL | |
| 550 ? (char_u *)"" : sourcing_name); | |
| 551 if (excp->throw_name == NULL) | |
| 552 { | |
| 5517 | 553 if (should_free) |
| 7 | 554 vim_free(excp->value); |
| 555 goto nomem; | |
| 556 } | |
| 557 excp->throw_lnum = sourcing_lnum; | |
| 558 | |
| 559 if (p_verbose >= 13 || debug_break_level > 0) | |
| 560 { | |
| 561 int save_msg_silent = msg_silent; | |
| 562 | |
| 563 if (debug_break_level > 0) | |
| 564 msg_silent = FALSE; /* display messages */ | |
| 293 | 565 else |
| 566 verbose_enter(); | |
| 7 | 567 ++no_wait_return; |
| 293 | 568 if (debug_break_level > 0 || *p_vfile == NUL) |
| 569 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 570 | |
| 273 | 571 smsg((char_u *)_("Exception thrown: %s"), excp->value); |
| 7 | 572 msg_puts((char_u *)"\n"); /* don't overwrite this either */ |
| 293 | 573 |
| 574 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 575 cmdline_row = msg_row; | |
| 7 | 576 --no_wait_return; |
| 577 if (debug_break_level > 0) | |
| 578 msg_silent = save_msg_silent; | |
| 293 | 579 else |
| 580 verbose_leave(); | |
| 7 | 581 } |
| 582 | |
| 583 current_exception = excp; | |
| 584 return OK; | |
| 585 | |
| 586 nomem: | |
| 587 vim_free(excp); | |
| 588 suppress_errthrow = TRUE; | |
| 589 EMSG(_(e_outofmem)); | |
| 590 fail: | |
| 591 current_exception = NULL; | |
| 592 return FAIL; | |
| 593 } | |
| 594 | |
| 595 /* | |
| 596 * Discard an exception. "was_finished" is set when the exception has been | |
| 597 * caught and the catch clause has been ended normally. | |
| 598 */ | |
| 599 static void | |
| 600 discard_exception(excp, was_finished) | |
| 601 except_T *excp; | |
| 602 int was_finished; | |
| 603 { | |
| 604 char_u *saved_IObuff; | |
| 605 | |
| 606 if (excp == NULL) | |
| 607 { | |
| 608 EMSG(_(e_internal)); | |
| 609 return; | |
| 610 } | |
| 611 | |
| 612 if (p_verbose >= 13 || debug_break_level > 0) | |
| 613 { | |
| 614 int save_msg_silent = msg_silent; | |
| 615 | |
| 616 saved_IObuff = vim_strsave(IObuff); | |
| 617 if (debug_break_level > 0) | |
| 618 msg_silent = FALSE; /* display messages */ | |
| 293 | 619 else |
| 620 verbose_enter(); | |
| 7 | 621 ++no_wait_return; |
| 293 | 622 if (debug_break_level > 0 || *p_vfile == NUL) |
| 623 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 273 | 624 smsg(was_finished |
| 7 | 625 ? (char_u *)_("Exception finished: %s") |
| 626 : (char_u *)_("Exception discarded: %s"), | |
| 627 excp->value); | |
| 628 msg_puts((char_u *)"\n"); /* don't overwrite this either */ | |
| 293 | 629 if (debug_break_level > 0 || *p_vfile == NUL) |
| 630 cmdline_row = msg_row; | |
| 7 | 631 --no_wait_return; |
| 632 if (debug_break_level > 0) | |
| 633 msg_silent = save_msg_silent; | |
| 293 | 634 else |
| 635 verbose_leave(); | |
| 7 | 636 STRCPY(IObuff, saved_IObuff); |
| 637 vim_free(saved_IObuff); | |
| 638 } | |
| 639 if (excp->type != ET_INTERRUPT) | |
| 640 vim_free(excp->value); | |
| 641 if (excp->type == ET_ERROR) | |
| 642 free_msglist(excp->messages); | |
| 643 vim_free(excp->throw_name); | |
| 644 vim_free(excp); | |
| 645 } | |
| 646 | |
| 647 /* | |
| 648 * Discard the exception currently being thrown. | |
| 649 */ | |
| 650 void | |
| 651 discard_current_exception() | |
| 652 { | |
| 653 discard_exception(current_exception, FALSE); | |
| 654 current_exception = NULL; | |
| 655 did_throw = FALSE; | |
| 656 need_rethrow = FALSE; | |
| 657 } | |
| 658 | |
| 659 /* | |
| 660 * Put an exception on the caught stack. | |
| 661 */ | |
| 662 static void | |
| 663 catch_exception(excp) | |
| 664 except_T *excp; | |
| 665 { | |
| 666 excp->caught = caught_stack; | |
| 667 caught_stack = excp; | |
| 668 set_vim_var_string(VV_EXCEPTION, excp->value, -1); | |
| 669 if (*excp->throw_name != NUL) | |
| 670 { | |
| 671 if (excp->throw_lnum != 0) | |
| 273 | 672 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"), |
| 673 excp->throw_name, (long)excp->throw_lnum); | |
| 7 | 674 else |
| 273 | 675 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name); |
| 7 | 676 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 677 } | |
| 678 else | |
| 679 /* throw_name not set on an exception from a command that was typed. */ | |
| 680 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 681 | |
| 682 if (p_verbose >= 13 || debug_break_level > 0) | |
| 683 { | |
| 684 int save_msg_silent = msg_silent; | |
| 685 | |
| 686 if (debug_break_level > 0) | |
| 687 msg_silent = FALSE; /* display messages */ | |
| 293 | 688 else |
| 689 verbose_enter(); | |
| 7 | 690 ++no_wait_return; |
| 293 | 691 if (debug_break_level > 0 || *p_vfile == NUL) |
| 692 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 693 | |
| 273 | 694 smsg((char_u *)_("Exception caught: %s"), excp->value); |
| 7 | 695 msg_puts((char_u *)"\n"); /* don't overwrite this either */ |
| 293 | 696 |
| 697 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 698 cmdline_row = msg_row; | |
| 7 | 699 --no_wait_return; |
| 700 if (debug_break_level > 0) | |
| 701 msg_silent = save_msg_silent; | |
| 293 | 702 else |
| 703 verbose_leave(); | |
| 7 | 704 } |
| 705 } | |
| 706 | |
| 707 /* | |
| 708 * Remove an exception from the caught stack. | |
| 709 */ | |
| 710 static void | |
| 711 finish_exception(excp) | |
| 712 except_T *excp; | |
| 713 { | |
| 714 if (excp != caught_stack) | |
| 715 EMSG(_(e_internal)); | |
| 716 caught_stack = caught_stack->caught; | |
| 717 if (caught_stack != NULL) | |
| 718 { | |
| 719 set_vim_var_string(VV_EXCEPTION, caught_stack->value, -1); | |
| 720 if (*caught_stack->throw_name != NUL) | |
| 721 { | |
| 722 if (caught_stack->throw_lnum != 0) | |
| 273 | 723 vim_snprintf((char *)IObuff, IOSIZE, |
| 7 | 724 _("%s, line %ld"), caught_stack->throw_name, |
| 725 (long)caught_stack->throw_lnum); | |
| 726 else | |
| 273 | 727 vim_snprintf((char *)IObuff, IOSIZE, "%s", |
| 728 caught_stack->throw_name); | |
| 7 | 729 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 730 } | |
| 731 else | |
| 732 /* throw_name not set on an exception from a command that was | |
| 733 * typed. */ | |
| 734 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 735 } | |
| 736 else | |
| 737 { | |
| 738 set_vim_var_string(VV_EXCEPTION, NULL, -1); | |
| 739 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 740 } | |
| 741 | |
| 742 /* Discard the exception, but use the finish message for 'verbose'. */ | |
| 743 discard_exception(excp, TRUE); | |
| 744 } | |
| 745 | |
| 746 /* | |
| 747 * Flags specifying the message displayed by report_pending. | |
| 748 */ | |
| 749 #define RP_MAKE 0 | |
| 750 #define RP_RESUME 1 | |
| 751 #define RP_DISCARD 2 | |
| 752 | |
| 753 /* | |
| 754 * Report information about something pending in a finally clause if required by | |
| 755 * the 'verbose' option or when debugging. "action" tells whether something is | |
| 756 * made pending or something pending is resumed or discarded. "pending" tells | |
| 757 * what is pending. "value" specifies the return value for a pending ":return" | |
| 758 * or the exception value for a pending exception. | |
| 759 */ | |
| 760 static void | |
| 761 report_pending(action, pending, value) | |
| 762 int action; | |
| 763 int pending; | |
| 764 void *value; | |
| 765 { | |
| 766 char_u *mesg; | |
| 767 char *s; | |
| 768 int save_msg_silent; | |
| 769 | |
| 770 | |
| 771 switch (action) | |
| 772 { | |
| 773 case RP_MAKE: | |
| 774 mesg = (char_u *)_("%s made pending"); | |
| 775 break; | |
| 776 case RP_RESUME: | |
| 777 mesg = (char_u *)_("%s resumed"); | |
| 778 break; | |
| 779 /* case RP_DISCARD: */ | |
| 780 default: | |
| 781 mesg = (char_u *)_("%s discarded"); | |
| 782 break; | |
| 783 } | |
| 784 | |
| 785 switch (pending) | |
| 786 { | |
| 787 case CSTP_NONE: | |
| 788 return; | |
| 789 | |
| 790 case CSTP_CONTINUE: | |
| 791 s = ":continue"; | |
| 792 break; | |
| 793 case CSTP_BREAK: | |
| 794 s = ":break"; | |
| 795 break; | |
| 796 case CSTP_FINISH: | |
| 797 s = ":finish"; | |
| 798 break; | |
| 799 case CSTP_RETURN: | |
| 800 /* ":return" command producing value, allocated */ | |
| 801 s = (char *)get_return_cmd(value); | |
| 802 break; | |
| 803 | |
| 804 default: | |
| 805 if (pending & CSTP_THROW) | |
| 806 { | |
| 273 | 807 vim_snprintf((char *)IObuff, IOSIZE, |
| 808 (char *)mesg, _("Exception")); | |
| 7 | 809 mesg = vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4); |
| 810 STRCAT(mesg, ": %s"); | |
| 811 s = (char *)((except_T *)value)->value; | |
| 812 } | |
| 813 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT)) | |
| 814 s = _("Error and interrupt"); | |
| 815 else if (pending & CSTP_ERROR) | |
| 816 s = _("Error"); | |
| 817 else /* if (pending & CSTP_INTERRUPT) */ | |
| 818 s = _("Interrupt"); | |
| 819 } | |
| 820 | |
| 821 save_msg_silent = msg_silent; | |
| 822 if (debug_break_level > 0) | |
| 823 msg_silent = FALSE; /* display messages */ | |
| 824 ++no_wait_return; | |
| 825 msg_scroll = TRUE; /* always scroll up, don't overwrite */ | |
| 273 | 826 smsg(mesg, (char_u *)s); |
| 7 | 827 msg_puts((char_u *)"\n"); /* don't overwrite this either */ |
| 828 cmdline_row = msg_row; | |
| 829 --no_wait_return; | |
| 830 if (debug_break_level > 0) | |
| 831 msg_silent = save_msg_silent; | |
| 832 | |
| 833 if (pending == CSTP_RETURN) | |
| 834 vim_free(s); | |
| 835 else if (pending & CSTP_THROW) | |
| 836 vim_free(mesg); | |
| 837 } | |
| 838 | |
| 839 /* | |
| 840 * If something is made pending in a finally clause, report it if required by | |
| 841 * the 'verbose' option or when debugging. | |
| 842 */ | |
| 843 void | |
| 844 report_make_pending(pending, value) | |
| 845 int pending; | |
| 846 void *value; | |
| 847 { | |
| 848 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 849 { |
| 850 if (debug_break_level <= 0) | |
| 851 verbose_enter(); | |
| 7 | 852 report_pending(RP_MAKE, pending, value); |
| 293 | 853 if (debug_break_level <= 0) |
| 854 verbose_leave(); | |
| 855 } | |
| 7 | 856 } |
| 857 | |
| 858 /* | |
| 859 * If something pending in a finally clause is resumed at the ":endtry", report | |
| 860 * it if required by the 'verbose' option or when debugging. | |
| 861 */ | |
| 862 void | |
| 863 report_resume_pending(pending, value) | |
| 864 int pending; | |
| 865 void *value; | |
| 866 { | |
| 867 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 868 { |
| 869 if (debug_break_level <= 0) | |
| 870 verbose_enter(); | |
| 7 | 871 report_pending(RP_RESUME, pending, value); |
| 293 | 872 if (debug_break_level <= 0) |
| 873 verbose_leave(); | |
| 874 } | |
| 7 | 875 } |
| 876 | |
| 877 /* | |
| 878 * If something pending in a finally clause is discarded, report it if required | |
| 879 * by the 'verbose' option or when debugging. | |
| 880 */ | |
| 881 void | |
| 882 report_discard_pending(pending, value) | |
| 883 int pending; | |
| 884 void *value; | |
| 885 { | |
| 886 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 887 { |
| 888 if (debug_break_level <= 0) | |
| 889 verbose_enter(); | |
| 7 | 890 report_pending(RP_DISCARD, pending, value); |
| 293 | 891 if (debug_break_level <= 0) |
| 892 verbose_leave(); | |
| 893 } | |
| 7 | 894 } |
| 895 | |
| 896 | |
| 897 /* | |
| 898 * ":if". | |
| 899 */ | |
| 900 void | |
| 901 ex_if(eap) | |
| 902 exarg_T *eap; | |
| 903 { | |
| 904 int error; | |
| 905 int skip; | |
| 906 int result; | |
| 907 struct condstack *cstack = eap->cstack; | |
| 908 | |
| 909 if (cstack->cs_idx == CSTACK_LEN - 1) | |
| 910 eap->errmsg = (char_u *)N_("E579: :if nesting too deep"); | |
| 911 else | |
| 912 { | |
| 913 ++cstack->cs_idx; | |
| 914 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 915 | |
| 916 /* | |
| 917 * Don't do something after an error, interrupt, or throw, or when there | |
| 918 * is a surrounding conditional and it was not active. | |
| 919 */ | |
| 920 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 921 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 922 | |
| 923 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 924 | |
| 925 if (!skip && !error) | |
| 926 { | |
| 927 if (result) | |
| 928 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 929 } | |
| 930 else | |
| 931 /* set TRUE, so this conditional will never get active */ | |
| 932 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 933 } | |
| 934 } | |
| 935 | |
| 936 /* | |
| 937 * ":endif". | |
| 938 */ | |
| 939 void | |
| 940 ex_endif(eap) | |
| 941 exarg_T *eap; | |
| 942 { | |
| 943 did_endif = TRUE; | |
| 944 if (eap->cstack->cs_idx < 0 | |
| 79 | 945 || (eap->cstack->cs_flags[eap->cstack->cs_idx] |
| 946 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
| 7 | 947 eap->errmsg = (char_u *)N_("E580: :endif without :if"); |
| 948 else | |
| 949 { | |
| 950 /* | |
| 951 * When debugging or a breakpoint was encountered, display the debug | |
| 952 * prompt (if not already done). This shows the user that an ":endif" | |
| 953 * is executed when the ":if" or a previous ":elseif" was not TRUE. | |
| 954 * Handle a ">quit" debug command as if an interrupt had occurred before | |
| 955 * the ":endif". That is, throw an interrupt exception if appropriate. | |
| 956 * Doing this here prevents an exception for a parsing error being | |
| 957 * discarded by throwing the interrupt exception later on. | |
| 958 */ | |
| 359 | 959 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE) |
| 960 && dbg_check_skipped(eap)) | |
| 7 | 961 (void)do_intthrow(eap->cstack); |
| 962 | |
| 963 --eap->cstack->cs_idx; | |
| 964 } | |
| 965 } | |
| 966 | |
| 967 /* | |
| 968 * ":else" and ":elseif". | |
| 969 */ | |
| 970 void | |
| 971 ex_else(eap) | |
| 972 exarg_T *eap; | |
| 973 { | |
| 974 int error; | |
| 975 int skip; | |
| 976 int result; | |
| 977 struct condstack *cstack = eap->cstack; | |
| 978 | |
| 979 /* | |
| 980 * Don't do something after an error, interrupt, or throw, or when there is | |
| 981 * a surrounding conditional and it was not active. | |
| 982 */ | |
| 983 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 984 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 985 | |
| 986 if (cstack->cs_idx < 0 | |
| 75 | 987 || (cstack->cs_flags[cstack->cs_idx] |
| 988 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
| 7 | 989 { |
| 990 if (eap->cmdidx == CMD_else) | |
| 991 { | |
| 992 eap->errmsg = (char_u *)N_("E581: :else without :if"); | |
| 993 return; | |
| 994 } | |
| 995 eap->errmsg = (char_u *)N_("E582: :elseif without :if"); | |
| 996 skip = TRUE; | |
| 997 } | |
| 998 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) | |
| 999 { | |
| 1000 if (eap->cmdidx == CMD_else) | |
| 1001 { | |
| 1002 eap->errmsg = (char_u *)N_("E583: multiple :else"); | |
| 1003 return; | |
| 1004 } | |
| 1005 eap->errmsg = (char_u *)N_("E584: :elseif after :else"); | |
| 1006 skip = TRUE; | |
| 1007 } | |
| 1008 | |
| 1009 /* if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it */ | |
| 1010 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) | |
| 1011 { | |
| 1012 if (eap->errmsg == NULL) | |
| 1013 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 1014 skip = TRUE; /* don't evaluate an ":elseif" */ | |
| 1015 } | |
| 1016 else | |
| 1017 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE; | |
| 1018 | |
| 1019 /* | |
| 1020 * When debugging or a breakpoint was encountered, display the debug prompt | |
| 1021 * (if not already done). This shows the user that an ":else" or ":elseif" | |
| 1022 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle | |
| 1023 * a ">quit" debug command as if an interrupt had occurred before the | |
| 1024 * ":else" or ":elseif". That is, set "skip" and throw an interrupt | |
| 1025 * exception if appropriate. Doing this here prevents that an exception | |
| 1026 * for a parsing errors is discarded when throwing the interrupt exception | |
| 1027 * later on. | |
| 1028 */ | |
| 1029 if (!skip && dbg_check_skipped(eap) && got_int) | |
| 1030 { | |
| 1031 (void)do_intthrow(cstack); | |
| 1032 skip = TRUE; | |
| 1033 } | |
| 1034 | |
| 1035 if (eap->cmdidx == CMD_elseif) | |
| 1036 { | |
| 1037 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 1038 /* When throwing error exceptions, we want to throw always the first | |
| 1039 * of several errors in a row. This is what actually happens when | |
| 1040 * a conditional error was detected above and there is another failure | |
| 1041 * when parsing the expression. Since the skip flag is set in this | |
| 1042 * case, the parsing error will be ignored by emsg(). */ | |
| 1043 | |
| 1044 if (!skip && !error) | |
| 1045 { | |
| 1046 if (result) | |
| 1047 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 1048 else | |
| 1049 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 1050 } | |
| 1051 else if (eap->errmsg == NULL) | |
| 1052 /* set TRUE, so this conditional will never get active */ | |
| 1053 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
| 1054 } | |
| 1055 else | |
| 1056 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE; | |
| 1057 } | |
| 1058 | |
| 1059 /* | |
| 75 | 1060 * Handle ":while" and ":for". |
| 7 | 1061 */ |
| 1062 void | |
| 1063 ex_while(eap) | |
| 1064 exarg_T *eap; | |
| 1065 { | |
| 1066 int error; | |
| 1067 int skip; | |
| 1068 int result; | |
| 1069 struct condstack *cstack = eap->cstack; | |
| 1070 | |
| 1071 if (cstack->cs_idx == CSTACK_LEN - 1) | |
| 75 | 1072 eap->errmsg = (char_u *)N_("E585: :while/:for nesting too deep"); |
| 7 | 1073 else |
| 1074 { | |
| 1075 /* | |
| 75 | 1076 * The loop flag is set when we have jumped back from the matching |
| 1077 * ":endwhile" or ":endfor". When not set, need to initialise this | |
| 1078 * cstack entry. | |
| 7 | 1079 */ |
| 75 | 1080 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) |
| 7 | 1081 { |
| 1082 ++cstack->cs_idx; | |
| 75 | 1083 ++cstack->cs_looplevel; |
| 7 | 1084 cstack->cs_line[cstack->cs_idx] = -1; |
| 1085 } | |
| 75 | 1086 cstack->cs_flags[cstack->cs_idx] = |
| 1087 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR; | |
| 7 | 1088 |
| 1089 /* | |
| 75 | 1090 * Don't do something after an error, interrupt, or throw, or when |
| 1091 * there is a surrounding conditional and it was not active. | |
| 7 | 1092 */ |
| 1093 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1094 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 75 | 1095 if (eap->cmdidx == CMD_while) |
| 1096 { | |
| 1097 /* | |
| 1098 * ":while bool-expr" | |
| 1099 */ | |
| 1100 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip); | |
| 1101 } | |
| 1102 else | |
| 1103 { | |
| 1104 void *fi; | |
| 1105 | |
| 1106 /* | |
| 1107 * ":for var in list-expr" | |
| 1108 */ | |
| 1109 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) | |
| 1110 { | |
| 1111 /* Jumping here from a ":continue" or ":endfor": use the | |
| 1112 * previously evaluated list. */ | |
| 79 | 1113 fi = cstack->cs_forinfo[cstack->cs_idx]; |
| 75 | 1114 error = FALSE; |
| 1115 } | |
| 1116 else | |
| 1117 { | |
| 1118 /* Evaluate the argument and get the info in a structure. */ | |
| 1119 fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip); | |
| 79 | 1120 cstack->cs_forinfo[cstack->cs_idx] = fi; |
| 75 | 1121 } |
| 1122 | |
| 1123 /* use the element at the start of the list and advance */ | |
| 1124 if (!error && fi != NULL && !skip) | |
| 1125 result = next_for_item(fi, eap->arg); | |
| 1126 else | |
| 1127 result = FALSE; | |
| 1128 | |
| 1129 if (!result) | |
| 1130 { | |
| 1131 free_for_info(fi); | |
| 79 | 1132 cstack->cs_forinfo[cstack->cs_idx] = NULL; |
| 75 | 1133 } |
| 1134 } | |
| 7 | 1135 |
| 1136 /* | |
| 75 | 1137 * If this cstack entry was just initialised and is active, set the |
| 1138 * loop flag, so do_cmdline() will set the line number in cs_line[]. | |
| 1139 * If executing the command a second time, clear the loop flag. | |
| 7 | 1140 */ |
| 1141 if (!skip && !error && result) | |
| 1142 { | |
| 75 | 1143 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE); |
| 1144 cstack->cs_lflags ^= CSL_HAD_LOOP; | |
| 7 | 1145 } |
| 1146 else | |
| 1147 { | |
| 75 | 1148 cstack->cs_lflags &= ~CSL_HAD_LOOP; |
| 1149 /* If the ":while" evaluates to FALSE or ":for" is past the end of | |
| 1150 * the list, show the debug prompt at the ":endwhile"/":endfor" as | |
| 1151 * if there was a ":break" in a ":while"/":for" evaluating to | |
| 1152 * TRUE. */ | |
| 7 | 1153 if (!skip && !error) |
| 1154 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE; | |
| 1155 } | |
| 1156 } | |
| 1157 } | |
| 1158 | |
| 1159 /* | |
| 1160 * ":continue" | |
| 1161 */ | |
| 1162 void | |
| 1163 ex_continue(eap) | |
| 1164 exarg_T *eap; | |
| 1165 { | |
| 1166 int idx; | |
| 1167 struct condstack *cstack = eap->cstack; | |
| 1168 | |
| 75 | 1169 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
| 1170 eap->errmsg = (char_u *)N_("E586: :continue without :while or :for"); | |
| 7 | 1171 else |
| 1172 { | |
| 1173 /* Try to find the matching ":while". This might stop at a try | |
| 1174 * conditional not in its finally clause (which is then to be executed | |
| 1175 * next). Therefor, inactivate all conditionals except the ":while" | |
| 1176 * itself (if reached). */ | |
| 75 | 1177 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 840 | 1178 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1179 { |
| 79 | 1180 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 7 | 1181 |
| 1182 /* | |
| 75 | 1183 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the |
| 7 | 1184 * matching ":while". |
| 1185 */ | |
| 75 | 1186 cstack->cs_lflags |= CSL_HAD_CONT; /* let do_cmdline() handle it */ |
| 7 | 1187 } |
| 1188 else | |
| 1189 { | |
| 1190 /* If a try conditional not in its finally clause is reached first, | |
| 1191 * make the ":continue" pending for execution at the ":endtry". */ | |
| 1192 cstack->cs_pending[idx] = CSTP_CONTINUE; | |
| 1193 report_make_pending(CSTP_CONTINUE, NULL); | |
| 1194 } | |
| 1195 } | |
| 1196 } | |
| 1197 | |
| 1198 /* | |
| 1199 * ":break" | |
| 1200 */ | |
| 1201 void | |
| 1202 ex_break(eap) | |
| 1203 exarg_T *eap; | |
| 1204 { | |
| 1205 int idx; | |
| 1206 struct condstack *cstack = eap->cstack; | |
| 1207 | |
| 75 | 1208 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
| 1209 eap->errmsg = (char_u *)N_("E587: :break without :while or :for"); | |
| 7 | 1210 else |
| 1211 { | |
| 1212 /* Inactivate conditionals until the matching ":while" or a try | |
| 1213 * conditional not in its finally clause (which is then to be | |
| 1214 * executed next) is found. In the latter case, make the ":break" | |
| 1215 * pending for execution at the ":endtry". */ | |
| 75 | 1216 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE); |
| 840 | 1217 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1218 { |
| 1219 cstack->cs_pending[idx] = CSTP_BREAK; | |
| 1220 report_make_pending(CSTP_BREAK, NULL); | |
| 1221 } | |
| 1222 } | |
| 1223 } | |
| 1224 | |
| 1225 /* | |
| 75 | 1226 * ":endwhile" and ":endfor" |
| 7 | 1227 */ |
| 1228 void | |
| 1229 ex_endwhile(eap) | |
| 1230 exarg_T *eap; | |
| 1231 { | |
| 1232 struct condstack *cstack = eap->cstack; | |
| 75 | 1233 int idx; |
| 1234 char_u *err; | |
| 1235 int csf; | |
| 1236 int fl; | |
| 7 | 1237 |
| 75 | 1238 if (eap->cmdidx == CMD_endwhile) |
| 1239 { | |
| 1240 err = e_while; | |
| 1241 csf = CSF_WHILE; | |
| 1242 } | |
| 1243 else | |
| 1244 { | |
| 1245 err = e_for; | |
| 1246 csf = CSF_FOR; | |
| 1247 } | |
| 1248 | |
| 1249 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) | |
| 1250 eap->errmsg = err; | |
| 7 | 1251 else |
| 1252 { | |
| 75 | 1253 fl = cstack->cs_flags[cstack->cs_idx]; |
| 1254 if (!(fl & csf)) | |
| 7 | 1255 { |
| 114 | 1256 /* If we are in a ":while" or ":for" but used the wrong endloop |
| 1257 * command, do not rewind to the next enclosing ":for"/":while". */ | |
| 75 | 1258 if (fl & CSF_WHILE) |
| 114 | 1259 eap->errmsg = (char_u *)_("E732: Using :endfor with :while"); |
| 75 | 1260 else if (fl & CSF_FOR) |
| 114 | 1261 eap->errmsg = (char_u *)_("E733: Using :endwhile with :for"); |
| 1262 } | |
| 1263 if (!(fl & (CSF_WHILE | CSF_FOR))) | |
| 1264 { | |
| 1265 if (!(fl & CSF_TRY)) | |
| 75 | 1266 eap->errmsg = e_endif; |
| 1267 else if (fl & CSF_FINALLY) | |
| 1268 eap->errmsg = e_endtry; | |
| 7 | 1269 /* Try to find the matching ":while" and report what's missing. */ |
| 1270 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1271 { | |
| 75 | 1272 fl = cstack->cs_flags[idx]; |
| 1273 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) | |
| 7 | 1274 { |
| 1275 /* Give up at a try conditional not in its finally clause. | |
| 75 | 1276 * Ignore the ":endwhile"/":endfor". */ |
| 1277 eap->errmsg = err; | |
| 7 | 1278 return; |
| 1279 } | |
| 75 | 1280 if (fl & csf) |
| 7 | 1281 break; |
| 1282 } | |
| 1283 /* Cleanup and rewind all contained (and unclosed) conditionals. */ | |
| 75 | 1284 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 7 | 1285 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 1286 } | |
| 1287 | |
| 1288 /* | |
| 1289 * When debugging or a breakpoint was encountered, display the debug | |
| 1290 * prompt (if not already done). This shows the user that an | |
| 75 | 1291 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or |
| 1292 * after a ":break". Handle a ">quit" debug command as if an | |
| 1293 * interrupt had occurred before the ":endwhile"/":endfor". That is, | |
| 1294 * throw an interrupt exception if appropriate. Doing this here | |
| 1295 * prevents that an exception for a parsing error is discarded when | |
| 1296 * throwing the interrupt exception later on. | |
| 7 | 1297 */ |
| 1298 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE | |
| 1299 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE) | |
| 1300 && dbg_check_skipped(eap)) | |
| 1301 (void)do_intthrow(cstack); | |
| 1302 | |
| 1303 /* | |
| 75 | 1304 * Set loop flag, so do_cmdline() will jump back to the matching |
| 1305 * ":while" or ":for". | |
| 7 | 1306 */ |
| 75 | 1307 cstack->cs_lflags |= CSL_HAD_ENDLOOP; |
| 7 | 1308 } |
| 1309 } | |
| 1310 | |
| 1311 | |
| 1312 /* | |
| 1313 * ":throw expr" | |
| 1314 */ | |
| 1315 void | |
| 1316 ex_throw(eap) | |
| 1317 exarg_T *eap; | |
| 1318 { | |
| 1319 char_u *arg = eap->arg; | |
| 1320 char_u *value; | |
| 1321 | |
| 1322 if (*arg != NUL && *arg != '|' && *arg != '\n') | |
| 1323 value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip); | |
| 1324 else | |
| 1325 { | |
| 1326 EMSG(_(e_argreq)); | |
| 1327 value = NULL; | |
| 1328 } | |
| 1329 | |
| 1330 /* On error or when an exception is thrown during argument evaluation, do | |
| 1331 * not throw. */ | |
| 1332 if (!eap->skip && value != NULL) | |
| 1333 { | |
| 1334 if (throw_exception(value, ET_USER, NULL) == FAIL) | |
| 1335 vim_free(value); | |
| 1336 else | |
| 1337 do_throw(eap->cstack); | |
| 1338 } | |
| 1339 } | |
| 1340 | |
| 1341 /* | |
| 21 | 1342 * Throw the current exception through the specified cstack. Common routine |
| 1343 * for ":throw" (user exception) and error and interrupt exceptions. Also | |
| 1344 * used for rethrowing an uncaught exception. | |
| 7 | 1345 */ |
| 1346 void | |
| 1347 do_throw(cstack) | |
| 1348 struct condstack *cstack; | |
| 1349 { | |
| 1350 int idx; | |
| 1351 int inactivate_try = FALSE; | |
| 1352 | |
| 1353 /* | |
| 1354 * Cleanup and inactivate up to the next surrounding try conditional that | |
| 1355 * is not in its finally clause. Normally, do not inactivate the try | |
| 1356 * conditional itself, so that its ACTIVE flag can be tested below. But | |
| 1357 * if a previous error or interrupt has not been converted to an exception, | |
| 1358 * inactivate the try conditional, too, as if the conversion had been done, | |
| 21 | 1359 * and reset the did_emsg or got_int flag, so this won't happen again at |
| 1360 * the next surrounding try conditional. | |
| 7 | 1361 */ |
| 1880 | 1362 #ifndef THROW_ON_ERROR_TRUE |
| 7 | 1363 if (did_emsg && !THROW_ON_ERROR) |
| 1364 { | |
| 1365 inactivate_try = TRUE; | |
| 1366 did_emsg = FALSE; | |
| 1367 } | |
| 1880 | 1368 #endif |
| 1369 #ifndef THROW_ON_INTERRUPT_TRUE | |
| 7 | 1370 if (got_int && !THROW_ON_INTERRUPT) |
| 1371 { | |
| 1372 inactivate_try = TRUE; | |
| 1373 got_int = FALSE; | |
| 1374 } | |
| 1880 | 1375 #endif |
| 7 | 1376 idx = cleanup_conditionals(cstack, 0, inactivate_try); |
| 1377 if (idx >= 0) | |
| 1378 { | |
| 1379 /* | |
| 1380 * If this try conditional is active and we are before its first | |
| 21 | 1381 * ":catch", set THROWN so that the ":catch" commands will check |
| 1382 * whether the exception matches. When the exception came from any of | |
| 1383 * the catch clauses, it will be made pending at the ":finally" (if | |
| 1384 * present) and rethrown at the ":endtry". This will also happen if | |
| 1385 * the try conditional is inactive. This is the case when we are | |
| 1386 * throwing an exception due to an error or interrupt on the way from | |
| 1387 * a preceding ":continue", ":break", ":return", ":finish", error or | |
| 1388 * interrupt (not converted to an exception) to the finally clause or | |
| 1389 * from a preceding throw of a user or error or interrupt exception to | |
| 1390 * the matching catch clause or the finally clause. | |
| 7 | 1391 */ |
| 1392 if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1393 { | |
| 1394 if (cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 1395 cstack->cs_flags[idx] |= CSF_THROWN; | |
| 1396 else | |
| 1397 /* THROWN may have already been set for a catchable exception | |
| 1398 * that has been discarded. Ensure it is reset for the new | |
| 1399 * exception. */ | |
| 1400 cstack->cs_flags[idx] &= ~CSF_THROWN; | |
| 1401 } | |
| 1402 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 1403 cstack->cs_exception[idx] = current_exception; | |
| 1404 } | |
| 1405 #if 0 | |
| 21 | 1406 /* TODO: Add optimization below. Not yet done because of interface |
| 1407 * problems to eval.c and ex_cmds2.c. (Servatius) */ | |
| 7 | 1408 else |
| 1409 { | |
| 1410 /* | |
| 1411 * There are no catch clauses to check or finally clauses to execute. | |
| 1412 * End the current script or function. The exception will be rethrown | |
| 1413 * in the caller. | |
| 1414 */ | |
| 1415 if (getline_equal(eap->getline, eap->cookie, get_func_line)) | |
| 1416 current_funccal->returned = TRUE; | |
| 1417 elseif (eap->get_func_line == getsourceline) | |
| 1418 ((struct source_cookie *)eap->cookie)->finished = TRUE; | |
| 1419 } | |
| 1420 #endif | |
| 1421 | |
| 1422 did_throw = TRUE; | |
| 1423 } | |
| 1424 | |
| 1425 /* | |
| 1426 * ":try" | |
| 1427 */ | |
| 1428 void | |
| 1429 ex_try(eap) | |
| 1430 exarg_T *eap; | |
| 1431 { | |
| 1432 int skip; | |
| 1433 struct condstack *cstack = eap->cstack; | |
| 1434 | |
| 1435 if (cstack->cs_idx == CSTACK_LEN - 1) | |
| 1436 eap->errmsg = (char_u *)N_("E601: :try nesting too deep"); | |
| 1437 else | |
| 1438 { | |
| 1439 ++cstack->cs_idx; | |
| 1440 ++cstack->cs_trylevel; | |
| 1441 cstack->cs_flags[cstack->cs_idx] = CSF_TRY; | |
| 1442 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE; | |
| 1443 | |
| 1444 /* | |
| 1445 * Don't do something after an error, interrupt, or throw, or when there | |
| 1446 * is a surrounding conditional and it was not active. | |
| 1447 */ | |
| 1448 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1449 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1450 | |
| 1451 if (!skip) | |
| 1452 { | |
| 1453 /* Set ACTIVE and TRUE. TRUE means that the corresponding ":catch" | |
| 1454 * commands should check for a match if an exception is thrown and | |
| 1455 * that the finally clause needs to be executed. */ | |
| 1456 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE; | |
| 1457 | |
| 1458 /* | |
| 1459 * ":silent!", even when used in a try conditional, disables | |
| 1460 * displaying of error messages and conversion of errors to | |
| 1461 * exceptions. When the silent commands again open a try | |
| 1462 * conditional, save "emsg_silent" and reset it so that errors are | |
| 1463 * again converted to exceptions. The value is restored when that | |
| 1464 * try conditional is left. If it is left normally, the commands | |
| 1465 * following the ":endtry" are again silent. If it is left by | |
| 1466 * a ":continue", ":break", ":return", or ":finish", the commands | |
| 1467 * executed next are again silent. If it is left due to an | |
| 1468 * aborting error, an interrupt, or an exception, restoring | |
| 1469 * "emsg_silent" does not matter since we are already in the | |
| 1470 * aborting state and/or the exception has already been thrown. | |
| 1471 * The effect is then just freeing the memory that was allocated | |
| 1472 * to save the value. | |
| 1473 */ | |
| 1474 if (emsg_silent) | |
| 1475 { | |
| 1476 eslist_T *elem; | |
| 1477 | |
| 1478 elem = (eslist_T *)alloc((unsigned)sizeof(struct eslist_elem)); | |
| 1479 if (elem == NULL) | |
| 1480 EMSG(_(e_outofmem)); | |
| 1481 else | |
| 1482 { | |
| 1483 elem->saved_emsg_silent = emsg_silent; | |
| 1484 elem->next = cstack->cs_emsg_silent_list; | |
| 1485 cstack->cs_emsg_silent_list = elem; | |
| 1486 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT; | |
| 1487 emsg_silent = 0; | |
| 1488 } | |
| 1489 } | |
| 1490 } | |
| 1491 | |
| 1492 } | |
| 1493 } | |
| 1494 | |
| 1495 /* | |
| 1496 * ":catch /{pattern}/" and ":catch" | |
| 1497 */ | |
| 1498 void | |
| 1499 ex_catch(eap) | |
| 1500 exarg_T *eap; | |
| 1501 { | |
| 1502 int idx = 0; | |
| 1503 int give_up = FALSE; | |
| 1504 int skip = FALSE; | |
| 1505 int caught = FALSE; | |
| 1506 char_u *end; | |
| 1507 int save_char = 0; | |
| 1508 char_u *save_cpo; | |
| 1509 regmatch_T regmatch; | |
| 1510 int prev_got_int; | |
| 1511 struct condstack *cstack = eap->cstack; | |
| 1512 char_u *pat; | |
| 1513 | |
| 1514 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1515 { | |
| 1516 eap->errmsg = (char_u *)N_("E603: :catch without :try"); | |
| 1517 give_up = TRUE; | |
| 1518 } | |
| 1519 else | |
| 1520 { | |
| 1521 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1522 { | |
| 1523 /* Report what's missing if the matching ":try" is not in its | |
| 1524 * finally clause. */ | |
| 75 | 1525 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1526 skip = TRUE; |
| 1527 } | |
| 1528 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1529 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1530 break; | |
| 1531 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1532 { | |
| 1533 /* Give up for a ":catch" after ":finally" and ignore it. | |
| 1534 * Just parse. */ | |
| 1535 eap->errmsg = (char_u *)N_("E604: :catch after :finally"); | |
| 1536 give_up = TRUE; | |
| 1537 } | |
| 79 | 1538 else |
| 75 | 1539 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1540 &cstack->cs_looplevel); | |
| 7 | 1541 } |
| 1542 | |
| 1543 if (ends_excmd(*eap->arg)) /* no argument, catch all errors */ | |
| 1544 { | |
| 1545 pat = (char_u *)".*"; | |
| 1546 end = NULL; | |
| 1547 eap->nextcmd = find_nextcmd(eap->arg); | |
| 1548 } | |
| 1549 else | |
| 1550 { | |
| 1551 pat = eap->arg + 1; | |
| 1552 end = skip_regexp(pat, *eap->arg, TRUE, NULL); | |
| 1553 } | |
| 1554 | |
| 1555 if (!give_up) | |
| 1556 { | |
| 1557 /* | |
| 1558 * Don't do something when no exception has been thrown or when the | |
| 1559 * corresponding try block never got active (because of an inactive | |
| 1560 * surrounding conditional or after an error or interrupt or throw). | |
| 1561 */ | |
| 1562 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE)) | |
| 1563 skip = TRUE; | |
| 1564 | |
| 1565 /* | |
| 1566 * Check for a match only if an exception is thrown but not caught by | |
| 1567 * a previous ":catch". An exception that has replaced a discarded | |
| 1568 * exception is not checked (THROWN is not set then). | |
| 1569 */ | |
| 1570 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN) | |
| 1571 && !(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1572 { | |
| 1573 if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1))) | |
| 1574 { | |
| 1575 EMSG(_(e_trailing)); | |
| 1576 return; | |
| 1577 } | |
| 1578 | |
| 1579 /* When debugging or a breakpoint was encountered, display the | |
| 1580 * debug prompt (if not already done) before checking for a match. | |
| 1581 * This is a helpful hint for the user when the regular expression | |
| 1582 * matching fails. Handle a ">quit" debug command as if an | |
| 1583 * interrupt had occurred before the ":catch". That is, discard | |
| 1584 * the original exception, replace it by an interrupt exception, | |
| 1585 * and don't catch it in this try block. */ | |
| 1586 if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) | |
| 1587 { | |
| 1588 /* Terminate the pattern and avoid the 'l' flag in 'cpoptions' | |
| 1589 * while compiling it. */ | |
| 1590 if (end != NULL) | |
| 1591 { | |
| 1592 save_char = *end; | |
| 1593 *end = NUL; | |
| 1594 } | |
| 1595 save_cpo = p_cpo; | |
| 1596 p_cpo = (char_u *)""; | |
| 1333 | 1597 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); |
| 7 | 1598 regmatch.rm_ic = FALSE; |
| 1599 if (end != NULL) | |
| 1600 *end = save_char; | |
| 1601 p_cpo = save_cpo; | |
| 1602 if (regmatch.regprog == NULL) | |
| 1603 EMSG2(_(e_invarg2), pat); | |
| 1604 else | |
| 1605 { | |
| 1606 /* | |
| 1607 * Save the value of got_int and reset it. We don't want | |
| 1608 * a previous interruption cancel matching, only hitting | |
| 1609 * CTRL-C while matching should abort it. | |
| 1610 */ | |
| 1611 prev_got_int = got_int; | |
| 1612 got_int = FALSE; | |
| 1613 caught = vim_regexec_nl(®match, current_exception->value, | |
| 1614 (colnr_T)0); | |
| 1615 got_int |= prev_got_int; | |
|
4805
66803af09906
updated for version 7.3.1149
Bram Moolenaar <bram@vim.org>
parents:
4352
diff
changeset
|
1616 vim_regfree(regmatch.regprog); |
| 7 | 1617 } |
| 1618 } | |
| 1619 } | |
| 1620 | |
| 1621 if (caught) | |
| 1622 { | |
| 1623 /* Make this ":catch" clause active and reset did_emsg, got_int, | |
| 1624 * and did_throw. Put the exception on the caught stack. */ | |
| 1625 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT; | |
| 1626 did_emsg = got_int = did_throw = FALSE; | |
| 1627 catch_exception((except_T *)cstack->cs_exception[idx]); | |
| 1628 /* It's mandatory that the current exception is stored in the cstack | |
| 1629 * so that it can be discarded at the next ":catch", ":finally", or | |
| 1630 * ":endtry" or when the catch clause is left by a ":continue", | |
| 1631 * ":break", ":return", ":finish", error, interrupt, or another | |
| 1632 * exception. */ | |
| 1633 if (cstack->cs_exception[cstack->cs_idx] != current_exception) | |
| 1634 EMSG(_(e_internal)); | |
| 1635 } | |
| 1636 else | |
| 1637 { | |
| 1638 /* | |
| 1639 * If there is a preceding catch clause and it caught the exception, | |
| 1640 * finish the exception now. This happens also after errors except | |
| 1641 * when this ":catch" was after the ":finally" or not within | |
| 1642 * a ":try". Make the try conditional inactive so that the | |
| 1643 * following catch clauses are skipped. On an error or interrupt | |
| 1644 * after the preceding try block or catch clause was left by | |
| 1645 * a ":continue", ":break", ":return", or ":finish", discard the | |
| 1646 * pending action. | |
| 1647 */ | |
| 1648 cleanup_conditionals(cstack, CSF_TRY, TRUE); | |
| 1649 } | |
| 1650 } | |
| 1651 | |
| 1652 if (end != NULL) | |
| 1653 eap->nextcmd = find_nextcmd(end); | |
| 1654 } | |
| 1655 | |
| 1656 /* | |
| 1657 * ":finally" | |
| 1658 */ | |
| 1659 void | |
| 1660 ex_finally(eap) | |
| 1661 exarg_T *eap; | |
| 1662 { | |
| 1663 int idx; | |
| 1664 int skip = FALSE; | |
| 1665 int pending = CSTP_NONE; | |
| 1666 struct condstack *cstack = eap->cstack; | |
| 1667 | |
| 1668 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1669 eap->errmsg = (char_u *)N_("E606: :finally without :try"); | |
| 1670 else | |
| 1671 { | |
| 1672 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1673 { | |
| 75 | 1674 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1675 for (idx = cstack->cs_idx - 1; idx > 0; --idx) |
| 1676 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1677 break; | |
| 1678 /* Make this error pending, so that the commands in the following | |
| 1679 * finally clause can be executed. This overrules also a pending | |
| 1680 * ":continue", ":break", ":return", or ":finish". */ | |
| 1681 pending = CSTP_ERROR; | |
| 1682 } | |
| 1683 else | |
| 1684 idx = cstack->cs_idx; | |
| 1685 | |
| 1686 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1687 { | |
| 1688 /* Give up for a multiple ":finally" and ignore it. */ | |
| 1689 eap->errmsg = (char_u *)N_("E607: multiple :finally"); | |
| 1690 return; | |
| 1691 } | |
| 79 | 1692 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 75 | 1693 &cstack->cs_looplevel); |
| 7 | 1694 |
| 1695 /* | |
| 1696 * Don't do something when the corresponding try block never got active | |
| 1697 * (because of an inactive surrounding conditional or after an error or | |
| 1698 * interrupt or throw) or for a ":finally" without ":try" or a multiple | |
| 1699 * ":finally". After every other error (did_emsg or the conditional | |
| 1700 * errors detected above) or after an interrupt (got_int) or an | |
| 1701 * exception (did_throw), the finally clause must be executed. | |
| 1702 */ | |
| 1703 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1704 | |
| 1705 if (!skip) | |
| 1706 { | |
| 1707 /* When debugging or a breakpoint was encountered, display the | |
| 1708 * debug prompt (if not already done). The user then knows that the | |
| 1709 * finally clause is executed. */ | |
| 1710 if (dbg_check_skipped(eap)) | |
| 1711 { | |
| 1712 /* Handle a ">quit" debug command as if an interrupt had | |
| 1713 * occurred before the ":finally". That is, discard the | |
| 1714 * original exception and replace it by an interrupt | |
| 1715 * exception. */ | |
| 1716 (void)do_intthrow(cstack); | |
| 1717 } | |
| 1718 | |
| 1719 /* | |
| 1720 * If there is a preceding catch clause and it caught the exception, | |
| 1721 * finish the exception now. This happens also after errors except | |
| 1722 * when this is a multiple ":finally" or one not within a ":try". | |
| 1723 * After an error or interrupt, this also discards a pending | |
| 1724 * ":continue", ":break", ":finish", or ":return" from the preceding | |
| 1725 * try block or catch clause. | |
| 1726 */ | |
| 1727 cleanup_conditionals(cstack, CSF_TRY, FALSE); | |
| 1728 | |
| 1729 /* | |
| 1730 * Make did_emsg, got_int, did_throw pending. If set, they overrule | |
| 1731 * a pending ":continue", ":break", ":return", or ":finish". Then | |
| 1732 * we have particularly to discard a pending return value (as done | |
| 1733 * by the call to cleanup_conditionals() above when did_emsg or | |
| 1734 * got_int is set). The pending values are restored by the | |
| 1735 * ":endtry", except if there is a new error, interrupt, exception, | |
| 1736 * ":continue", ":break", ":return", or ":finish" in the following | |
| 75 | 1737 * finally clause. A missing ":endwhile", ":endfor" or ":endif" |
| 1738 * detected here is treated as if did_emsg and did_throw had | |
| 1739 * already been set, respectively in case that the error is not | |
| 1740 * converted to an exception, did_throw had already been unset. | |
| 1741 * We must not set did_emsg here since that would suppress the | |
| 1742 * error message. | |
| 7 | 1743 */ |
| 1744 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) | |
| 1745 { | |
| 1746 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) | |
| 1747 { | |
| 1748 report_discard_pending(CSTP_RETURN, | |
| 68 | 1749 cstack->cs_rettv[cstack->cs_idx]); |
| 1750 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]); | |
| 7 | 1751 } |
| 1752 if (pending == CSTP_ERROR && !did_emsg) | |
| 1753 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0; | |
| 1754 else | |
| 1755 pending |= did_throw ? CSTP_THROW : 0; | |
| 1756 pending |= did_emsg ? CSTP_ERROR : 0; | |
| 1757 pending |= got_int ? CSTP_INTERRUPT : 0; | |
| 1758 cstack->cs_pending[cstack->cs_idx] = pending; | |
| 1759 | |
| 1760 /* It's mandatory that the current exception is stored in the | |
| 1761 * cstack so that it can be rethrown at the ":endtry" or be | |
| 1762 * discarded if the finally clause is left by a ":continue", | |
| 1763 * ":break", ":return", ":finish", error, interrupt, or another | |
| 1764 * exception. When emsg() is called for a missing ":endif" or | |
| 75 | 1765 * a missing ":endwhile"/":endfor" detected here, the |
| 1766 * exception will be discarded. */ | |
| 79 | 1767 if (did_throw && cstack->cs_exception[cstack->cs_idx] |
| 1768 != current_exception) | |
| 7 | 1769 EMSG(_(e_internal)); |
| 1770 } | |
| 1771 | |
| 1772 /* | |
| 75 | 1773 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg, |
| 22 | 1774 * got_int, and did_throw and make the finally clause active. |
| 1775 * This will happen after emsg() has been called for a missing | |
| 75 | 1776 * ":endif" or a missing ":endwhile"/":endfor" detected here, so |
| 1777 * that the following finally clause will be executed even then. | |
| 7 | 1778 */ |
| 75 | 1779 cstack->cs_lflags |= CSL_HAD_FINA; |
| 7 | 1780 } |
| 1781 } | |
| 1782 } | |
| 1783 | |
| 1784 /* | |
| 1785 * ":endtry" | |
| 1786 */ | |
| 1787 void | |
| 1788 ex_endtry(eap) | |
| 1789 exarg_T *eap; | |
| 1790 { | |
| 1791 int idx; | |
| 1792 int skip; | |
| 1793 int rethrow = FALSE; | |
| 1794 int pending = CSTP_NONE; | |
| 68 | 1795 void *rettv = NULL; |
| 7 | 1796 struct condstack *cstack = eap->cstack; |
| 1797 | |
| 1798 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1799 eap->errmsg = (char_u *)N_("E602: :endtry without :try"); | |
| 1800 else | |
| 1801 { | |
| 1802 /* | |
| 1803 * Don't do something after an error, interrupt or throw in the try | |
| 1804 * block, catch clause, or finally clause preceding this ":endtry" or | |
| 1805 * when an error or interrupt occurred after a ":continue", ":break", | |
| 1806 * ":return", or ":finish" in a try block or catch clause preceding this | |
| 1807 * ":endtry" or when the try block never got active (because of an | |
| 1808 * inactive surrounding conditional or after an error or interrupt or | |
| 1809 * throw) or when there is a surrounding conditional and it has been | |
| 1810 * made inactive by a ":continue", ":break", ":return", or ":finish" in | |
| 1811 * the finally clause. The latter case need not be tested since then | |
| 1812 * anything pending has already been discarded. */ | |
| 1813 skip = did_emsg || got_int || did_throw || | |
| 1814 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1815 | |
| 1816 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1817 { | |
| 75 | 1818 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1819 /* Find the matching ":try" and report what's missing. */ |
| 1820 idx = cstack->cs_idx; | |
| 1821 do | |
| 1822 --idx; | |
| 1823 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY)); | |
| 75 | 1824 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1825 &cstack->cs_looplevel); | |
| 7 | 1826 skip = TRUE; |
| 1827 | |
| 1828 /* | |
| 1829 * If an exception is being thrown, discard it to prevent it from | |
| 1830 * being rethrown at the end of this function. It would be | |
| 1831 * discarded by the error message, anyway. Resets did_throw. | |
| 1832 * This does not affect the script termination due to the error | |
| 1833 * since "trylevel" is decremented after emsg() has been called. | |
| 1834 */ | |
| 1835 if (did_throw) | |
| 1836 discard_current_exception(); | |
| 1837 } | |
| 1838 else | |
| 1839 { | |
| 1840 idx = cstack->cs_idx; | |
| 1841 | |
| 1842 /* | |
| 1843 * If we stopped with the exception currently being thrown at this | |
| 1844 * try conditional since we didn't know that it doesn't have | |
| 1845 * a finally clause, we need to rethrow it after closing the try | |
| 1846 * conditional. | |
| 1847 */ | |
| 1848 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE) | |
| 1849 && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1850 rethrow = TRUE; | |
| 1851 } | |
| 1852 | |
| 1853 /* If there was no finally clause, show the user when debugging or | |
| 1854 * a breakpoint was encountered that the end of the try conditional has | |
| 1855 * been reached: display the debug prompt (if not already done). Do | |
| 1856 * this on normal control flow or when an exception was thrown, but not | |
| 1857 * on an interrupt or error not converted to an exception or when | |
| 1858 * a ":break", ":continue", ":return", or ":finish" is pending. These | |
| 1859 * actions are carried out immediately. | |
| 1860 */ | |
| 1861 if ((rethrow || (!skip | |
| 1862 && !(cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1863 && !cstack->cs_pending[idx])) | |
| 1864 && dbg_check_skipped(eap)) | |
| 1865 { | |
| 1866 /* Handle a ">quit" debug command as if an interrupt had occurred | |
| 1867 * before the ":endtry". That is, throw an interrupt exception and | |
| 1868 * set "skip" and "rethrow". */ | |
| 1869 if (got_int) | |
| 1870 { | |
| 1871 skip = TRUE; | |
| 1872 (void)do_intthrow(cstack); | |
| 1873 /* The do_intthrow() call may have reset did_throw or | |
| 1874 * cstack->cs_pending[idx].*/ | |
| 1875 rethrow = FALSE; | |
| 1876 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1877 rethrow = TRUE; | |
| 1878 } | |
| 1879 } | |
| 1880 | |
| 1881 /* | |
| 1882 * If a ":return" is pending, we need to resume it after closing the | |
| 1883 * try conditional; remember the return value. If there was a finally | |
| 1884 * clause making an exception pending, we need to rethrow it. Make it | |
| 1885 * the exception currently being thrown. | |
| 1886 */ | |
| 1887 if (!skip) | |
| 1888 { | |
| 1889 pending = cstack->cs_pending[idx]; | |
| 1890 cstack->cs_pending[idx] = CSTP_NONE; | |
| 1891 if (pending == CSTP_RETURN) | |
| 68 | 1892 rettv = cstack->cs_rettv[idx]; |
| 7 | 1893 else if (pending & CSTP_THROW) |
| 1894 current_exception = cstack->cs_exception[idx]; | |
| 1895 } | |
| 1896 | |
| 1897 /* | |
| 1898 * Discard anything pending on an error, interrupt, or throw in the | |
| 1899 * finally clause. If there was no ":finally", discard a pending | |
| 1900 * ":continue", ":break", ":return", or ":finish" if an error or | |
| 1901 * interrupt occurred afterwards, but before the ":endtry" was reached. | |
| 1902 * If an exception was caught by the last of the catch clauses and there | |
| 1903 * was no finally clause, finish the exception now. This happens also | |
| 1904 * after errors except when this ":endtry" is not within a ":try". | |
| 1905 * Restore "emsg_silent" if it has been reset by this try conditional. | |
| 1906 */ | |
| 840 | 1907 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE); |
| 7 | 1908 |
| 1909 --cstack->cs_idx; | |
| 1910 --cstack->cs_trylevel; | |
| 1911 | |
| 1912 if (!skip) | |
| 1913 { | |
| 1914 report_resume_pending(pending, | |
| 68 | 1915 (pending == CSTP_RETURN) ? rettv : |
| 7 | 1916 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 1917 switch (pending) | |
| 1918 { | |
| 1919 case CSTP_NONE: | |
| 1920 break; | |
| 1921 | |
| 1922 /* Reactivate a pending ":continue", ":break", ":return", | |
| 1923 * ":finish" from the try block or a catch clause of this try | |
| 1924 * conditional. This is skipped, if there was an error in an | |
| 1925 * (unskipped) conditional command or an interrupt afterwards | |
| 1926 * or if the finally clause is present and executed a new error, | |
| 1927 * interrupt, throw, ":continue", ":break", ":return", or | |
| 1928 * ":finish". */ | |
| 1929 case CSTP_CONTINUE: | |
| 1930 ex_continue(eap); | |
| 1931 break; | |
| 1932 case CSTP_BREAK: | |
| 1933 ex_break(eap); | |
| 1934 break; | |
| 1935 case CSTP_RETURN: | |
| 68 | 1936 do_return(eap, FALSE, FALSE, rettv); |
| 7 | 1937 break; |
| 1938 case CSTP_FINISH: | |
| 1939 do_finish(eap, FALSE); | |
| 1940 break; | |
| 1941 | |
| 1942 /* When the finally clause was entered due to an error, | |
| 1943 * interrupt or throw (as opposed to a ":continue", ":break", | |
| 1944 * ":return", or ":finish"), restore the pending values of | |
| 1945 * did_emsg, got_int, and did_throw. This is skipped, if there | |
| 1946 * was a new error, interrupt, throw, ":continue", ":break", | |
| 1947 * ":return", or ":finish". in the finally clause. */ | |
| 1948 default: | |
| 1949 if (pending & CSTP_ERROR) | |
| 1950 did_emsg = TRUE; | |
| 1951 if (pending & CSTP_INTERRUPT) | |
| 1952 got_int = TRUE; | |
| 1953 if (pending & CSTP_THROW) | |
| 1954 rethrow = TRUE; | |
| 1955 break; | |
| 1956 } | |
| 1957 } | |
| 1958 | |
| 1959 if (rethrow) | |
| 1960 /* Rethrow the current exception (within this cstack). */ | |
| 1961 do_throw(cstack); | |
| 1962 } | |
| 1963 } | |
| 1964 | |
| 1965 /* | |
| 36 | 1966 * enter_cleanup() and leave_cleanup() |
| 1967 * | |
| 1968 * Functions to be called before/after invoking a sequence of autocommands for | |
| 1969 * cleanup for a failed command. (Failure means here that a call to emsg() | |
| 1970 * has been made, an interrupt occurred, or there is an uncaught exception | |
| 1971 * from a previous autocommand execution of the same command.) | |
| 24 | 1972 * |
| 36 | 1973 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same |
| 1974 * pointer to leave_cleanup(). The cleanup_T structure stores the pending | |
| 1975 * error/interrupt/exception state. | |
| 1976 */ | |
| 1977 | |
| 1978 /* | |
| 1979 * This function works a bit like ex_finally() except that there was not | |
| 1980 * actually an extra try block around the part that failed and an error or | |
| 1981 * interrupt has not (yet) been converted to an exception. This function | |
| 1982 * saves the error/interrupt/ exception state and prepares for the call to | |
| 1983 * do_cmdline() that is going to be made for the cleanup autocommand | |
| 1984 * execution. | |
| 24 | 1985 */ |
| 1986 void | |
| 1987 enter_cleanup(csp) | |
| 1988 cleanup_T *csp; | |
| 1989 { | |
| 1990 int pending = CSTP_NONE; | |
| 1991 | |
| 1992 /* | |
| 1993 * Postpone did_emsg, got_int, did_throw. The pending values will be | |
| 1994 * restored by leave_cleanup() except if there was an aborting error, | |
| 1995 * interrupt, or uncaught exception after this function ends. | |
| 1996 */ | |
| 1997 if (did_emsg || got_int || did_throw || need_rethrow) | |
| 1998 { | |
| 1999 csp->pending = (did_emsg ? CSTP_ERROR : 0) | |
| 2000 | (got_int ? CSTP_INTERRUPT : 0) | |
| 2001 | (did_throw ? CSTP_THROW : 0) | |
| 2002 | (need_rethrow ? CSTP_THROW : 0); | |
| 2003 | |
| 2004 /* If we are currently throwing an exception (did_throw), save it as | |
| 2005 * well. On an error not yet converted to an exception, update | |
| 2006 * "force_abort" and reset "cause_abort" (as do_errthrow() would do). | |
| 2007 * This is needed for the do_cmdline() call that is going to be made | |
| 2008 * for autocommand execution. We need not save *msg_list because | |
| 2009 * there is an extra instance for every call of do_cmdline(), anyway. | |
| 2010 */ | |
| 2011 if (did_throw || need_rethrow) | |
| 2012 csp->exception = current_exception; | |
| 2013 else | |
| 2014 { | |
| 2015 csp->exception = NULL; | |
| 2016 if (did_emsg) | |
| 2017 { | |
| 2018 force_abort |= cause_abort; | |
| 2019 cause_abort = FALSE; | |
| 2020 } | |
| 2021 } | |
| 2022 did_emsg = got_int = did_throw = need_rethrow = FALSE; | |
| 2023 | |
| 2024 /* Report if required by the 'verbose' option or when debugging. */ | |
| 2025 report_make_pending(pending, csp->exception); | |
| 2026 } | |
| 2027 else | |
| 2028 { | |
| 2029 csp->pending = CSTP_NONE; | |
| 2030 csp->exception = NULL; | |
| 2031 } | |
| 2032 } | |
| 2033 | |
| 2034 /* | |
| 36 | 2035 * See comment above enter_cleanup() for how this function is used. |
| 2036 * | |
| 2037 * This function is a bit like ex_endtry() except that there was not actually | |
| 2038 * an extra try block around the part that failed and an error or interrupt | |
| 2039 * had not (yet) been converted to an exception when the cleanup autocommand | |
| 2040 * sequence was invoked. | |
| 2041 * | |
| 2042 * This function has to be called with the address of the cleanup_T structure | |
| 2043 * filled by enter_cleanup() as an argument; it restores the error/interrupt/ | |
| 2044 * exception state saved by that function - except there was an aborting | |
| 2045 * error, an interrupt or an uncaught exception during execution of the | |
| 2046 * cleanup autocommands. In the latter case, the saved error/interrupt/ | |
| 2047 * exception state is discarded. | |
| 24 | 2048 */ |
| 2049 void | |
| 2050 leave_cleanup(csp) | |
| 2051 cleanup_T *csp; | |
| 2052 { | |
| 2053 int pending = csp->pending; | |
| 2054 | |
| 2055 if (pending == CSTP_NONE) /* nothing to do */ | |
| 2056 return; | |
| 2057 | |
| 2058 /* If there was an aborting error, an interrupt, or an uncaught exception | |
| 2059 * after the corresponding call to enter_cleanup(), discard what has been | |
| 2060 * made pending by it. Report this to the user if required by the | |
| 2061 * 'verbose' option or when debugging. */ | |
| 2062 if (aborting() || need_rethrow) | |
| 2063 { | |
| 2064 if (pending & CSTP_THROW) | |
| 2065 /* Cancel the pending exception (includes report). */ | |
| 2066 discard_exception((except_T *)csp->exception, FALSE); | |
| 2067 else | |
| 2068 report_discard_pending(pending, NULL); | |
| 2069 | |
| 2070 /* If an error was about to be converted to an exception when | |
| 2071 * enter_cleanup() was called, free the message list. */ | |
| 1046 | 2072 if (msg_list != NULL) |
| 5517 | 2073 free_global_msglist(); |
| 24 | 2074 } |
| 2075 | |
| 2076 /* | |
| 2077 * If there was no new error, interrupt, or throw between the calls | |
| 2078 * to enter_cleanup() and leave_cleanup(), restore the pending | |
| 2079 * error/interrupt/exception state. | |
| 2080 */ | |
| 2081 else | |
| 2082 { | |
| 2083 /* | |
| 2084 * If there was an exception being thrown when enter_cleanup() was | |
| 2085 * called, we need to rethrow it. Make it the exception currently | |
| 2086 * being thrown. | |
| 2087 */ | |
| 2088 if (pending & CSTP_THROW) | |
| 2089 current_exception = csp->exception; | |
| 2090 | |
| 2091 /* | |
| 2092 * If an error was about to be converted to an exception when | |
| 2093 * enter_cleanup() was called, let "cause_abort" take the part of | |
| 2094 * "force_abort" (as done by cause_errthrow()). | |
| 2095 */ | |
| 2096 else if (pending & CSTP_ERROR) | |
| 2097 { | |
| 2098 cause_abort = force_abort; | |
| 2099 force_abort = FALSE; | |
| 2100 } | |
| 2101 | |
| 2102 /* | |
| 2103 * Restore the pending values of did_emsg, got_int, and did_throw. | |
| 2104 */ | |
| 2105 if (pending & CSTP_ERROR) | |
| 2106 did_emsg = TRUE; | |
| 2107 if (pending & CSTP_INTERRUPT) | |
| 2108 got_int = TRUE; | |
| 2109 if (pending & CSTP_THROW) | |
| 2110 need_rethrow = TRUE; /* did_throw will be set by do_one_cmd() */ | |
| 2111 | |
| 2112 /* Report if required by the 'verbose' option or when debugging. */ | |
| 2113 report_resume_pending(pending, | |
| 36 | 2114 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 24 | 2115 } |
| 2116 } | |
| 2117 | |
| 2118 | |
| 2119 /* | |
| 7 | 2120 * Make conditionals inactive and discard what's pending in finally clauses |
| 2121 * until the conditional type searched for or a try conditional not in its | |
| 79 | 2122 * finally clause is reached. If this is in an active catch clause, finish |
| 2123 * the caught exception. | |
| 2124 * Return the cstack index where the search stopped. | |
| 75 | 2125 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0, |
| 2126 * the latter meaning the innermost try conditional not in its finally clause. | |
| 2127 * "inclusive" tells whether the conditional searched for should be made | |
| 4352 | 2128 * inactive itself (a try conditional not in its finally clause possibly find |
| 75 | 2129 * before is always made inactive). If "inclusive" is TRUE and |
| 2130 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of | |
| 2131 * "emsg_silent", if reset when the try conditional finally reached was | |
| 4352 | 2132 * entered, is restored (used by ex_endtry()). This is normally done only |
| 75 | 2133 * when such a try conditional is left. |
| 7 | 2134 */ |
| 2135 int | |
| 2136 cleanup_conditionals(cstack, searched_cond, inclusive) | |
| 2137 struct condstack *cstack; | |
| 2138 int searched_cond; | |
| 2139 int inclusive; | |
| 2140 { | |
| 2141 int idx; | |
| 2142 int stop = FALSE; | |
| 2143 | |
| 2144 for (idx = cstack->cs_idx; idx >= 0; --idx) | |
| 2145 { | |
| 2146 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 2147 { | |
| 2148 /* | |
| 2149 * Discard anything pending in a finally clause and continue the | |
| 2150 * search. There may also be a pending ":continue", ":break", | |
| 2151 * ":return", or ":finish" before the finally clause. We must not | |
| 2152 * discard it, unless an error or interrupt occurred afterwards. | |
| 2153 */ | |
| 359 | 2154 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) |
| 7 | 2155 { |
| 2156 switch (cstack->cs_pending[idx]) | |
| 2157 { | |
| 2158 case CSTP_NONE: | |
| 2159 break; | |
| 2160 | |
| 2161 case CSTP_CONTINUE: | |
| 2162 case CSTP_BREAK: | |
| 2163 case CSTP_FINISH: | |
| 2164 report_discard_pending(cstack->cs_pending[idx], NULL); | |
| 2165 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2166 break; | |
| 2167 | |
| 2168 case CSTP_RETURN: | |
| 2169 report_discard_pending(CSTP_RETURN, | |
| 68 | 2170 cstack->cs_rettv[idx]); |
| 2171 discard_pending_return(cstack->cs_rettv[idx]); | |
| 7 | 2172 cstack->cs_pending[idx] = CSTP_NONE; |
| 2173 break; | |
| 2174 | |
| 2175 default: | |
| 2176 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 2177 { | |
| 2178 if (cstack->cs_pending[idx] & CSTP_THROW) | |
| 2179 { | |
| 2180 /* Cancel the pending exception. This is in the | |
| 2181 * finally clause, so that the stack of the | |
| 2182 * caught exceptions is not involved. */ | |
| 2183 discard_exception((except_T *) | |
| 2184 cstack->cs_exception[idx], | |
| 2185 FALSE); | |
| 2186 } | |
| 2187 else | |
| 2188 report_discard_pending(cstack->cs_pending[idx], | |
| 2189 NULL); | |
| 2190 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2191 } | |
| 2192 break; | |
| 2193 } | |
| 2194 } | |
| 2195 | |
| 2196 /* | |
| 2197 * Stop at a try conditional not in its finally clause. If this try | |
| 2198 * conditional is in an active catch clause, finish the caught | |
| 2199 * exception. | |
| 2200 */ | |
| 2201 if (!(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 2202 { | |
| 2203 if ((cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 2204 && (cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 2205 finish_exception((except_T *)cstack->cs_exception[idx]); | |
| 2206 /* Stop at this try conditional - except the try block never | |
| 2207 * got active (because of an inactive surrounding conditional | |
| 2208 * or when the ":try" appeared after an error or interrupt or | |
| 2209 * throw). */ | |
| 2210 if (cstack->cs_flags[idx] & CSF_TRUE) | |
| 2211 { | |
| 2212 if (searched_cond == 0 && !inclusive) | |
| 2213 break; | |
| 2214 stop = TRUE; | |
| 2215 } | |
| 2216 } | |
| 2217 } | |
| 2218 | |
| 2219 /* Stop on the searched conditional type (even when the surrounding | |
| 2220 * conditional is not active or something has been made pending). | |
| 2221 * If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT, | |
| 2222 * check first whether "emsg_silent" needs to be restored. */ | |
| 2223 if (cstack->cs_flags[idx] & searched_cond) | |
| 2224 { | |
| 2225 if (!inclusive) | |
| 2226 break; | |
| 2227 stop = TRUE; | |
| 2228 } | |
| 2229 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 2230 if (stop && searched_cond != (CSF_TRY | CSF_SILENT)) | |
| 2231 break; | |
| 2232 | |
| 2233 /* | |
| 1214 | 2234 * When leaving a try conditional that reset "emsg_silent" on its |
| 2235 * entry after saving the original value, restore that value here and | |
| 2236 * free the memory used to store it. | |
| 7 | 2237 */ |
| 2238 if ((cstack->cs_flags[idx] & CSF_TRY) | |
| 359 | 2239 && (cstack->cs_flags[idx] & CSF_SILENT)) |
| 7 | 2240 { |
| 2241 eslist_T *elem; | |
| 2242 | |
| 2243 elem = cstack->cs_emsg_silent_list; | |
| 2244 cstack->cs_emsg_silent_list = elem->next; | |
| 2245 emsg_silent = elem->saved_emsg_silent; | |
| 2246 vim_free(elem); | |
| 2247 cstack->cs_flags[idx] &= ~CSF_SILENT; | |
| 2248 } | |
| 2249 if (stop) | |
| 2250 break; | |
| 2251 } | |
| 2252 return idx; | |
| 2253 } | |
| 2254 | |
| 2255 /* | |
| 75 | 2256 * Return an appropriate error message for a missing endwhile/endfor/endif. |
| 2257 */ | |
| 2258 static char_u * | |
| 2259 get_end_emsg(cstack) | |
| 2260 struct condstack *cstack; | |
| 2261 { | |
| 2262 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE) | |
| 2263 return e_endwhile; | |
| 2264 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) | |
| 2265 return e_endfor; | |
| 2266 return e_endif; | |
| 2267 } | |
| 2268 | |
| 2269 | |
| 2270 /* | |
| 7 | 2271 * Rewind conditionals until index "idx" is reached. "cond_type" and |
| 2272 * "cond_level" specify a conditional type and the address of a level variable | |
| 2273 * which is to be decremented with each skipped conditional of the specified | |
| 2274 * type. | |
| 79 | 2275 * Also free "for info" structures where needed. |
| 7 | 2276 */ |
| 79 | 2277 void |
| 7 | 2278 rewind_conditionals(cstack, idx, cond_type, cond_level) |
| 2279 struct condstack *cstack; | |
| 2280 int idx; | |
| 2281 int cond_type; | |
| 2282 int *cond_level; | |
| 2283 { | |
| 2284 while (cstack->cs_idx > idx) | |
| 2285 { | |
| 2286 if (cstack->cs_flags[cstack->cs_idx] & cond_type) | |
| 2287 --*cond_level; | |
| 79 | 2288 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
| 2289 free_for_info(cstack->cs_forinfo[cstack->cs_idx]); | |
| 7 | 2290 --cstack->cs_idx; |
| 2291 } | |
| 2292 } | |
| 2293 | |
| 2294 /* | |
| 2295 * ":endfunction" when not after a ":function" | |
| 2296 */ | |
| 2297 void | |
| 2298 ex_endfunction(eap) | |
| 1880 | 2299 exarg_T *eap UNUSED; |
| 7 | 2300 { |
| 2301 EMSG(_("E193: :endfunction not inside a function")); | |
| 2302 } | |
| 2303 | |
| 2304 /* | |
| 75 | 2305 * Return TRUE if the string "p" looks like a ":while" or ":for" command. |
| 7 | 2306 */ |
| 2307 int | |
| 75 | 2308 has_loop_cmd(p) |
| 7 | 2309 char_u *p; |
| 2310 { | |
| 1447 | 2311 int len; |
| 2312 | |
| 2313 /* skip modifiers, white space and ':' */ | |
| 2314 for (;;) | |
| 2315 { | |
| 2316 while (*p == ' ' || *p == '\t' || *p == ':') | |
| 2317 ++p; | |
| 2318 len = modifier_len(p); | |
| 2319 if (len == 0) | |
| 2320 break; | |
| 2321 p += len; | |
| 2322 } | |
| 75 | 2323 if ((p[0] == 'w' && p[1] == 'h') |
| 2324 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r')) | |
| 7 | 2325 return TRUE; |
| 2326 return FALSE; | |
| 2327 } | |
| 2328 | |
| 2329 #endif /* FEAT_EVAL */ |