Mercurial > vim
annotate src/ex_eval.c @ 21067:85b078be8036
Added tag v8.2.1084 for changeset 48cfc37fe4fc6d6fb2c77a5ddab31f45bf26ab80
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Mon, 29 Jun 2020 20:30:04 +0200 |
| parents | 111f877e63d9 |
| children | b0baa80cb53f |
| rev | line source |
|---|---|
|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 * ex_eval.c: functions for Ex command line for the +eval feature. | |
| 12 */ | |
| 13 | |
| 14 #include "vim.h" | |
| 15 | |
| 16 #if defined(FEAT_EVAL) || defined(PROTO) | |
| 17 | |
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18 static char *get_end_emsg(cstack_T *cstack); |
| 7 | 19 |
| 20 /* | |
| 21 * Exception handling terms: | |
| 22 * | |
| 23 * :try ":try" command \ | |
| 24 * ... try block | | |
| 25 * :catch RE ":catch" command | | |
| 26 * ... catch clause |- try conditional | |
| 27 * :finally ":finally" command | | |
| 28 * ... finally clause | | |
| 29 * :endtry ":endtry" command / | |
| 30 * | |
| 31 * The try conditional may have any number of catch clauses and at most one | |
| 32 * finally clause. A ":throw" command can be inside the try block, a catch | |
| 33 * clause, the finally clause, or in a function called or script sourced from | |
| 34 * there or even outside the try conditional. Try conditionals may be nested. | |
| 35 */ | |
| 36 | |
| 37 /* | |
| 38 * Configuration whether an exception is thrown on error or interrupt. When | |
| 39 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or | |
| 40 * interrupt (got_int) under an active try conditional terminates the script | |
| 41 * after the non-active finally clauses of all active try conditionals have been | |
| 42 * executed. Otherwise, errors and/or interrupts are converted into catchable | |
| 43 * exceptions (did_throw additionally set), which terminate the script only if | |
| 44 * not caught. For user exceptions, only did_throw is set. (Note: got_int can | |
| 4352 | 45 * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not |
| 7 | 46 * a reliant test that the exception currently being thrown is an interrupt |
| 47 * exception. Similarly, did_emsg can be set afterwards on an error in an | |
| 48 * (unskipped) conditional command inside an inactive conditional, so did_throw | |
| 49 * && did_emsg is not a reliant test that the exception currently being thrown | |
| 50 * is an error exception.) - The macros can be defined as expressions checking | |
| 51 * for a variable that is allowed to be changed during execution of a script. | |
| 52 */ | |
| 53 #if 0 | |
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54 // Expressions used for testing during the development phase. |
| 7 | 55 # define THROW_ON_ERROR (!eval_to_number("$VIMNOERRTHROW")) |
| 56 # define THROW_ON_INTERRUPT (!eval_to_number("$VIMNOINTTHROW")) | |
| 57 # define THROW_TEST | |
| 58 #else | |
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59 // Values used for the Vim release. |
| 7 | 60 # define THROW_ON_ERROR TRUE |
| 1880 | 61 # define THROW_ON_ERROR_TRUE |
| 7 | 62 # define THROW_ON_INTERRUPT TRUE |
| 1880 | 63 # define THROW_ON_INTERRUPT_TRUE |
| 7 | 64 #endif |
| 65 | |
| 66 /* | |
| 67 * When several errors appear in a row, setting "force_abort" is delayed until | |
| 68 * the failing command returned. "cause_abort" is set to TRUE meanwhile, in | |
| 69 * order to indicate that situation. This is useful when "force_abort" was set | |
| 70 * during execution of a function call from an expression: the aborting of the | |
| 71 * expression evaluation is done without producing any error messages, but all | |
| 72 * error messages on parsing errors during the expression evaluation are given | |
| 73 * (even if a try conditional is active). | |
| 74 */ | |
| 75 static int cause_abort = FALSE; | |
| 76 | |
| 77 /* | |
| 1214 | 78 * Return TRUE when immediately aborting on error, or when an interrupt |
| 7 | 79 * occurred or an exception was thrown but not caught. Use for ":{range}call" |
| 80 * to check whether an aborted function that does not handle a range itself | |
| 81 * should be called again for the next line in the range. Also used for | |
| 82 * cancelling expression evaluation after a function call caused an immediate | |
| 83 * abort. Note that the first emsg() call temporarily resets "force_abort" | |
| 84 * until the throw point for error messages has been reached. That is, during | |
| 85 * cancellation of an expression evaluation after an aborting function call or | |
| 86 * due to a parsing error, aborting() always returns the same value. | |
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87 * "got_int" is also set by calling interrupt(). |
| 7 | 88 */ |
| 89 int | |
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90 aborting(void) |
| 7 | 91 { |
| 92 return (did_emsg && force_abort) || got_int || did_throw; | |
| 93 } | |
| 94 | |
| 95 /* | |
| 96 * The value of "force_abort" is temporarily reset by the first emsg() call | |
| 97 * during an expression evaluation, and "cause_abort" is used instead. It might | |
| 98 * be necessary to restore "force_abort" even before the throw point for the | |
| 99 * error message has been reached. update_force_abort() should be called then. | |
| 100 */ | |
| 101 void | |
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102 update_force_abort(void) |
| 7 | 103 { |
| 104 if (cause_abort) | |
| 105 force_abort = TRUE; | |
| 106 } | |
| 107 | |
| 108 /* | |
| 109 * Return TRUE if a command with a subcommand resulting in "retcode" should | |
| 110 * abort the script processing. Can be used to suppress an autocommand after | |
| 111 * execution of a failing subcommand as long as the error message has not been | |
| 112 * displayed and actually caused the abortion. | |
| 113 */ | |
| 114 int | |
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115 should_abort(int retcode) |
| 7 | 116 { |
| 117 return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting()); | |
| 118 } | |
| 119 | |
| 120 /* | |
| 121 * Return TRUE if a function with the "abort" flag should not be considered | |
| 122 * ended on an error. This means that parsing commands is continued in order | |
| 123 * to find finally clauses to be executed, and that some errors in skipped | |
| 124 * commands are still reported. | |
| 125 */ | |
| 126 int | |
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127 aborted_in_try(void) |
| 7 | 128 { |
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129 // This function is only called after an error. In this case, "force_abort" |
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130 // determines whether searching for finally clauses is necessary. |
| 7 | 131 return force_abort; |
| 132 } | |
| 133 | |
| 134 /* | |
| 135 * cause_errthrow(): Cause a throw of an error exception if appropriate. | |
| 136 * Return TRUE if the error message should not be displayed by emsg(). | |
| 137 * Sets "ignore", if the emsg() call should be ignored completely. | |
| 138 * | |
| 139 * When several messages appear in the same command, the first is usually the | |
| 140 * most specific one and used as the exception value. The "severe" flag can be | |
| 141 * set to TRUE, if a later but severer message should be used instead. | |
| 142 */ | |
| 143 int | |
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144 cause_errthrow( |
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145 char_u *mesg, |
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146 int severe, |
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147 int *ignore) |
| 7 | 148 { |
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149 msglist_T *elem; |
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150 msglist_T **plist; |
| 7 | 151 |
| 152 /* | |
| 839 | 153 * Do nothing when displaying the interrupt message or reporting an |
| 154 * uncaught exception (which has already been discarded then) at the top | |
| 155 * level. Also when no exception can be thrown. The message will be | |
| 156 * displayed by emsg(). | |
| 7 | 157 */ |
| 158 if (suppress_errthrow) | |
| 159 return FALSE; | |
| 160 | |
| 161 /* | |
| 839 | 162 * If emsg() has not been called previously, temporarily reset |
| 163 * "force_abort" until the throw point for error messages has been | |
| 164 * reached. This ensures that aborting() returns the same value for all | |
| 165 * errors that appear in the same command. This means particularly that | |
| 166 * for parsing errors during expression evaluation emsg() will be called | |
| 167 * multiply, even when the expression is evaluated from a finally clause | |
| 168 * that was activated due to an aborting error, interrupt, or exception. | |
| 7 | 169 */ |
| 170 if (!did_emsg) | |
| 171 { | |
| 172 cause_abort = force_abort; | |
| 173 force_abort = FALSE; | |
| 174 } | |
| 175 | |
| 176 /* | |
| 177 * If no try conditional is active and no exception is being thrown and | |
| 178 * there has not been an error in a try conditional or a throw so far, do | |
| 839 | 179 * nothing (for compatibility of non-EH scripts). The message will then |
| 180 * be displayed by emsg(). When ":silent!" was used and we are not | |
| 181 * currently throwing an exception, do nothing. The message text will | |
| 182 * then be stored to v:errmsg by emsg() without displaying it. | |
| 7 | 183 */ |
| 184 if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw) | |
| 185 return FALSE; | |
| 186 | |
| 187 /* | |
| 188 * Ignore an interrupt message when inside a try conditional or when an | |
| 839 | 189 * exception is being thrown or when an error in a try conditional or |
| 190 * throw has been detected previously. This is important in order that an | |
| 7 | 191 * interrupt exception is catchable by the innermost try conditional and |
| 192 * not replaced by an interrupt message error exception. | |
| 193 */ | |
| 194 if (mesg == (char_u *)_(e_interr)) | |
| 195 { | |
| 196 *ignore = TRUE; | |
| 197 return TRUE; | |
| 198 } | |
| 199 | |
| 200 /* | |
| 201 * Ensure that all commands in nested function calls and sourced files | |
| 202 * are aborted immediately. | |
| 203 */ | |
| 204 cause_abort = TRUE; | |
| 205 | |
| 206 /* | |
| 207 * When an exception is being thrown, some commands (like conditionals) are | |
| 208 * not skipped. Errors in those commands may affect what of the subsequent | |
| 209 * commands are regarded part of catch and finally clauses. Catching the | |
| 210 * exception would then cause execution of commands not intended by the | |
| 211 * user, who wouldn't even get aware of the problem. Therefor, discard the | |
| 212 * exception currently being thrown to prevent it from being caught. Just | |
| 213 * execute finally clauses and terminate. | |
| 214 */ | |
| 215 if (did_throw) | |
| 216 { | |
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217 // When discarding an interrupt exception, reset got_int to prevent the |
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218 // same interrupt being converted to an exception again and discarding |
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219 // the error exception we are about to throw here. |
| 7 | 220 if (current_exception->type == ET_INTERRUPT) |
| 221 got_int = FALSE; | |
| 222 discard_current_exception(); | |
| 223 } | |
| 224 | |
| 225 #ifdef THROW_TEST | |
| 226 if (!THROW_ON_ERROR) | |
| 227 { | |
| 228 /* | |
| 229 * Print error message immediately without searching for a matching | |
| 230 * catch clause; just finally clauses are executed before the script | |
| 231 * is terminated. | |
| 232 */ | |
| 233 return FALSE; | |
| 234 } | |
| 235 else | |
| 236 #endif | |
| 237 { | |
| 238 /* | |
| 239 * Prepare the throw of an error exception, so that everything will | |
| 240 * be aborted (except for executing finally clauses), until the error | |
| 241 * exception is caught; if still uncaught at the top level, the error | |
| 242 * message will be displayed and the script processing terminated | |
| 243 * then. - This function has no access to the conditional stack. | |
| 244 * Thus, the actual throw is made after the failing command has | |
| 245 * returned. - Throw only the first of several errors in a row, except | |
| 246 * a severe error is following. | |
| 247 */ | |
| 248 if (msg_list != NULL) | |
| 249 { | |
| 250 plist = msg_list; | |
| 251 while (*plist != NULL) | |
| 252 plist = &(*plist)->next; | |
| 253 | |
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254 elem = ALLOC_CLEAR_ONE(msglist_T); |
| 7 | 255 if (elem == NULL) |
| 256 { | |
| 257 suppress_errthrow = TRUE; | |
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258 emsg(_(e_outofmem)); |
| 7 | 259 } |
| 260 else | |
| 261 { | |
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262 elem->msg = (char *)vim_strsave(mesg); |
| 7 | 263 if (elem->msg == NULL) |
| 264 { | |
| 265 vim_free(elem); | |
| 266 suppress_errthrow = TRUE; | |
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267 emsg(_(e_outofmem)); |
| 7 | 268 } |
| 269 else | |
| 270 { | |
| 271 elem->next = NULL; | |
| 272 elem->throw_msg = NULL; | |
| 273 *plist = elem; | |
| 274 if (plist == msg_list || severe) | |
| 275 { | |
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276 char *tmsg; |
| 7 | 277 |
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278 // Skip the extra "Vim " prefix for message "E458". |
| 7 | 279 tmsg = elem->msg; |
| 280 if (STRNCMP(tmsg, "Vim E", 5) == 0 | |
| 281 && VIM_ISDIGIT(tmsg[5]) | |
| 282 && VIM_ISDIGIT(tmsg[6]) | |
| 283 && VIM_ISDIGIT(tmsg[7]) | |
| 284 && tmsg[8] == ':' | |
| 285 && tmsg[9] == ' ') | |
| 286 (*msg_list)->throw_msg = &tmsg[4]; | |
| 287 else | |
| 288 (*msg_list)->throw_msg = tmsg; | |
| 289 } | |
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290 |
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291 // Get the source name and lnum now, it may change before |
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292 // reaching do_errthrow(). |
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293 elem->sfile = estack_sfile(); |
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294 elem->slnum = SOURCING_LNUM; |
| 7 | 295 } |
| 296 } | |
| 297 } | |
| 298 return TRUE; | |
| 299 } | |
| 300 } | |
| 301 | |
| 302 /* | |
| 303 * Free a "msg_list" and the messages it contains. | |
| 304 */ | |
| 305 static void | |
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306 free_msglist(msglist_T *l) |
| 7 | 307 { |
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308 msglist_T *messages, *next; |
| 7 | 309 |
| 310 messages = l; | |
| 311 while (messages != NULL) | |
| 312 { | |
| 313 next = messages->next; | |
| 314 vim_free(messages->msg); | |
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315 vim_free(messages->sfile); |
| 7 | 316 vim_free(messages); |
| 317 messages = next; | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 /* | |
| 5517 | 322 * Free global "*msg_list" and the messages it contains, then set "*msg_list" |
| 323 * to NULL. | |
| 324 */ | |
| 325 void | |
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326 free_global_msglist(void) |
| 5517 | 327 { |
| 328 free_msglist(*msg_list); | |
| 329 *msg_list = NULL; | |
| 330 } | |
| 331 | |
| 332 /* | |
| 7 | 333 * Throw the message specified in the call to cause_errthrow() above as an |
| 334 * error exception. If cstack is NULL, postpone the throw until do_cmdline() | |
| 335 * has returned (see do_one_cmd()). | |
| 336 */ | |
| 337 void | |
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338 do_errthrow(cstack_T *cstack, char_u *cmdname) |
| 7 | 339 { |
| 340 /* | |
| 341 * Ensure that all commands in nested function calls and sourced files | |
| 342 * are aborted immediately. | |
| 343 */ | |
| 344 if (cause_abort) | |
| 345 { | |
| 346 cause_abort = FALSE; | |
| 347 force_abort = TRUE; | |
| 348 } | |
| 349 | |
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350 // If no exception is to be thrown or the conversion should be done after |
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351 // returning to a previous invocation of do_one_cmd(), do nothing. |
| 1046 | 352 if (msg_list == NULL || *msg_list == NULL) |
| 7 | 353 return; |
| 354 | |
| 355 if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL) | |
| 356 free_msglist(*msg_list); | |
| 357 else | |
| 358 { | |
| 359 if (cstack != NULL) | |
| 360 do_throw(cstack); | |
| 361 else | |
| 362 need_rethrow = TRUE; | |
| 363 } | |
| 364 *msg_list = NULL; | |
| 365 } | |
| 366 | |
| 367 /* | |
| 368 * do_intthrow(): Replace the current exception by an interrupt or interrupt | |
| 369 * exception if appropriate. Return TRUE if the current exception is discarded, | |
| 370 * FALSE otherwise. | |
| 371 */ | |
| 372 int | |
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373 do_intthrow(cstack_T *cstack) |
| 7 | 374 { |
| 375 /* | |
| 376 * If no interrupt occurred or no try conditional is active and no exception | |
| 377 * is being thrown, do nothing (for compatibility of non-EH scripts). | |
| 378 */ | |
| 379 if (!got_int || (trylevel == 0 && !did_throw)) | |
| 380 return FALSE; | |
| 381 | |
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patch 8.1.2379: using old C style comments
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changeset
|
382 #ifdef THROW_TEST // avoid warning for condition always true |
| 7 | 383 if (!THROW_ON_INTERRUPT) |
| 384 { | |
| 385 /* | |
| 386 * The interrupt aborts everything except for executing finally clauses. | |
| 387 * Discard any user or error or interrupt exception currently being | |
| 388 * thrown. | |
| 389 */ | |
| 390 if (did_throw) | |
| 391 discard_current_exception(); | |
| 392 } | |
| 393 else | |
| 394 #endif | |
| 395 { | |
| 396 /* | |
| 397 * Throw an interrupt exception, so that everything will be aborted | |
| 398 * (except for executing finally clauses), until the interrupt exception | |
| 399 * is caught; if still uncaught at the top level, the script processing | |
| 400 * will be terminated then. - If an interrupt exception is already | |
| 401 * being thrown, do nothing. | |
| 402 * | |
| 403 */ | |
| 404 if (did_throw) | |
| 405 { | |
| 406 if (current_exception->type == ET_INTERRUPT) | |
| 407 return FALSE; | |
| 408 | |
|
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diff
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|
409 // An interrupt exception replaces any user or error exception. |
| 7 | 410 discard_current_exception(); |
| 411 } | |
| 412 if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL) | |
| 413 do_throw(cstack); | |
| 414 } | |
| 415 | |
| 416 return TRUE; | |
| 417 } | |
| 418 | |
| 419 /* | |
| 5517 | 420 * Get an exception message that is to be stored in current_exception->value. |
| 7 | 421 */ |
|
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patch 8.1.0743: giving error messages is not flexible
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|
422 char * |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
423 get_exception_string( |
|
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
424 void *value, |
|
10361
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commit https://github.com/vim/vim/commit/8a5883b7488e492419dde7e1637cc72f2d566ba4
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
425 except_type_T type, |
|
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|
426 char_u *cmdname, |
|
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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changeset
|
427 int *should_free) |
| 7 | 428 { |
|
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patch 8.1.0743: giving error messages is not flexible
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changeset
|
429 char *ret; |
|
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patch 8.1.0743: giving error messages is not flexible
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|
430 char *mesg; |
| 7 | 431 int cmdlen; |
|
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changeset
|
432 char *p, *val; |
| 7 | 433 |
| 434 if (type == ET_ERROR) | |
| 435 { | |
|
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commit https://github.com/vim/vim/commit/9ef00be261115acb5bae3b3ca45c1d86a19ba2c7
Christian Brabandt <cb@256bit.org>
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changeset
|
436 *should_free = TRUE; |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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|
437 mesg = ((msglist_T *)value)->throw_msg; |
| 7 | 438 if (cmdname != NULL && *cmdname != NUL) |
| 439 { | |
| 835 | 440 cmdlen = (int)STRLEN(cmdname); |
|
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patch 8.1.0743: giving error messages is not flexible
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|
441 ret = (char *)vim_strnsave((char_u *)"Vim(", |
|
20830
9064044fd4f6
patch 8.2.0967: unnecessary type casts for vim_strnsave()
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|
442 4 + cmdlen + 2 + STRLEN(mesg)); |
| 5517 | 443 if (ret == NULL) |
| 444 return ret; | |
| 445 STRCPY(&ret[4], cmdname); | |
| 446 STRCPY(&ret[4 + cmdlen], "):"); | |
| 447 val = ret + 4 + cmdlen + 2; | |
| 7 | 448 } |
| 449 else | |
| 450 { | |
|
20830
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patch 8.2.0967: unnecessary type casts for vim_strnsave()
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451 ret = (char *)vim_strnsave((char_u *)"Vim:", 4 + STRLEN(mesg)); |
| 5517 | 452 if (ret == NULL) |
| 453 return ret; | |
| 454 val = ret + 4; | |
| 7 | 455 } |
| 456 | |
|
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457 // msg_add_fname may have been used to prefix the message with a file |
|
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458 // name in quotes. In the exception value, put the file name in |
|
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patch 8.1.2379: using old C style comments
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changeset
|
459 // parentheses and move it to the end. |
| 7 | 460 for (p = mesg; ; p++) |
| 461 { | |
| 462 if (*p == NUL | |
| 463 || (*p == 'E' | |
| 464 && VIM_ISDIGIT(p[1]) | |
| 465 && (p[2] == ':' | |
| 466 || (VIM_ISDIGIT(p[2]) | |
| 467 && (p[3] == ':' | |
| 468 || (VIM_ISDIGIT(p[3]) | |
| 469 && p[4] == ':')))))) | |
| 470 { | |
| 273 | 471 if (*p == NUL || p == mesg) |
|
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472 STRCAT(val, mesg); // 'E123' missing or at beginning |
| 7 | 473 else |
| 474 { | |
|
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|
475 // '"filename" E123: message text' |
| 7 | 476 if (mesg[0] != '"' || p-2 < &mesg[1] || |
| 477 p[-2] != '"' || p[-1] != ' ') | |
|
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|
478 // "E123:" is part of the file name. |
| 7 | 479 continue; |
| 480 | |
| 481 STRCAT(val, p); | |
| 482 p[-2] = NUL; | |
| 483 sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]); | |
| 484 p[-2] = '"'; | |
| 485 } | |
| 486 break; | |
| 487 } | |
| 488 } | |
| 489 } | |
| 490 else | |
| 5517 | 491 { |
| 492 *should_free = FALSE; | |
|
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|
493 ret = value; |
| 5517 | 494 } |
| 495 | |
| 496 return ret; | |
| 497 } | |
| 498 | |
| 499 | |
| 500 /* | |
| 501 * Throw a new exception. Return FAIL when out of memory or it was tried to | |
| 502 * throw an illegal user exception. "value" is the exception string for a | |
| 503 * user or interrupt exception, or points to a message list in case of an | |
| 504 * error exception. | |
| 505 */ | |
|
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patch 8.2.0149: maintaining a Vim9 branch separately is more work
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506 int |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
507 throw_exception(void *value, except_type_T type, char_u *cmdname) |
| 5517 | 508 { |
| 509 except_T *excp; | |
| 510 int should_free; | |
| 511 | |
| 512 /* | |
| 513 * Disallow faking Interrupt or error exceptions as user exceptions. They | |
| 514 * would be treated differently from real interrupt or error exceptions | |
| 515 * when no active try block is found, see do_cmdline(). | |
| 516 */ | |
| 517 if (type == ET_USER) | |
| 518 { | |
| 519 if (STRNCMP((char_u *)value, "Vim", 3) == 0 | |
| 520 && (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':' | |
| 521 || ((char_u *)value)[3] == '(')) | |
| 522 { | |
|
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523 emsg(_("E608: Cannot :throw exceptions with 'Vim' prefix")); |
| 5517 | 524 goto fail; |
| 525 } | |
| 526 } | |
| 527 | |
|
16825
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patch 8.1.1414: alloc() returning "char_u *" causes a lot of type casts
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changeset
|
528 excp = ALLOC_ONE(except_T); |
| 5517 | 529 if (excp == NULL) |
| 530 goto nomem; | |
| 531 | |
| 532 if (type == ET_ERROR) | |
|
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changeset
|
533 // Store the original message and prefix the exception value with |
|
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changeset
|
534 // "Vim:" or, if a command name is given, "Vim(cmdname):". |
|
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changeset
|
535 excp->messages = (msglist_T *)value; |
| 5517 | 536 |
| 537 excp->value = get_exception_string(value, type, cmdname, &should_free); | |
| 538 if (excp->value == NULL && should_free) | |
| 539 goto nomem; | |
| 7 | 540 |
| 541 excp->type = type; | |
|
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changeset
|
542 if (type == ET_ERROR && ((msglist_T *)value)->sfile != NULL) |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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|
543 { |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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changeset
|
544 msglist_T *entry = (msglist_T *)value; |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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changeset
|
545 |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
546 excp->throw_name = entry->sfile; |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
547 entry->sfile = NULL; |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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changeset
|
548 excp->throw_lnum = entry->slnum; |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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|
549 } |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
550 else |
| 7 | 551 { |
|
20538
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patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
552 excp->throw_name = estack_sfile(); |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
553 if (excp->throw_name == NULL) |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
554 excp->throw_name = vim_strsave((char_u *)""); |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
555 if (excp->throw_name == NULL) |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
556 { |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
557 if (should_free) |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
558 vim_free(excp->value); |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
559 goto nomem; |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
560 } |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
561 excp->throw_lnum = SOURCING_LNUM; |
| 7 | 562 } |
| 563 | |
| 564 if (p_verbose >= 13 || debug_break_level > 0) | |
| 565 { | |
| 566 int save_msg_silent = msg_silent; | |
| 567 | |
| 568 if (debug_break_level > 0) | |
|
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changeset
|
569 msg_silent = FALSE; // display messages |
| 293 | 570 else |
| 571 verbose_enter(); | |
| 7 | 572 ++no_wait_return; |
| 293 | 573 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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patch 8.1.2379: using old C style comments
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changeset
|
574 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 575 |
|
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patch 8.1.0743: giving error messages is not flexible
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diff
changeset
|
576 smsg(_("Exception thrown: %s"), excp->value); |
|
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patch 8.1.2379: using old C style comments
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
577 msg_puts("\n"); // don't overwrite this either |
| 293 | 578 |
| 579 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 580 cmdline_row = msg_row; | |
| 7 | 581 --no_wait_return; |
| 582 if (debug_break_level > 0) | |
| 583 msg_silent = save_msg_silent; | |
| 293 | 584 else |
| 585 verbose_leave(); | |
| 7 | 586 } |
| 587 | |
| 588 current_exception = excp; | |
| 589 return OK; | |
| 590 | |
| 591 nomem: | |
| 592 vim_free(excp); | |
| 593 suppress_errthrow = TRUE; | |
|
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patch 8.1.0743: giving error messages is not flexible
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diff
changeset
|
594 emsg(_(e_outofmem)); |
| 7 | 595 fail: |
| 596 current_exception = NULL; | |
| 597 return FAIL; | |
| 598 } | |
| 599 | |
| 600 /* | |
| 601 * Discard an exception. "was_finished" is set when the exception has been | |
| 602 * caught and the catch clause has been ended normally. | |
| 603 */ | |
| 604 static void | |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
605 discard_exception(except_T *excp, int was_finished) |
| 7 | 606 { |
| 607 char_u *saved_IObuff; | |
| 608 | |
| 609 if (excp == NULL) | |
| 610 { | |
|
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commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
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10042
diff
changeset
|
611 internal_error("discard_exception()"); |
| 7 | 612 return; |
| 613 } | |
| 614 | |
| 615 if (p_verbose >= 13 || debug_break_level > 0) | |
| 616 { | |
| 617 int save_msg_silent = msg_silent; | |
| 618 | |
| 619 saved_IObuff = vim_strsave(IObuff); | |
| 620 if (debug_break_level > 0) | |
|
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changeset
|
621 msg_silent = FALSE; // display messages |
| 293 | 622 else |
| 623 verbose_enter(); | |
| 7 | 624 ++no_wait_return; |
| 293 | 625 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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changeset
|
626 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 273 | 627 smsg(was_finished |
|
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diff
changeset
|
628 ? _("Exception finished: %s") |
|
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diff
changeset
|
629 : _("Exception discarded: %s"), |
| 7 | 630 excp->value); |
|
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changeset
|
631 msg_puts("\n"); // don't overwrite this either |
| 293 | 632 if (debug_break_level > 0 || *p_vfile == NUL) |
| 633 cmdline_row = msg_row; | |
| 7 | 634 --no_wait_return; |
| 635 if (debug_break_level > 0) | |
| 636 msg_silent = save_msg_silent; | |
| 293 | 637 else |
| 638 verbose_leave(); | |
| 7 | 639 STRCPY(IObuff, saved_IObuff); |
| 640 vim_free(saved_IObuff); | |
| 641 } | |
| 642 if (excp->type != ET_INTERRUPT) | |
| 643 vim_free(excp->value); | |
| 644 if (excp->type == ET_ERROR) | |
| 645 free_msglist(excp->messages); | |
| 646 vim_free(excp->throw_name); | |
| 647 vim_free(excp); | |
| 648 } | |
| 649 | |
| 650 /* | |
| 651 * Discard the exception currently being thrown. | |
| 652 */ | |
| 653 void | |
|
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Christian Brabandt <cb@256bit.org>
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7801
diff
changeset
|
654 discard_current_exception(void) |
| 7 | 655 { |
|
11645
50f2a4ad1cfa
patch 8.0.0705: crash when there is an error in a timer callback
Christian Brabandt <cb@256bit.org>
parents:
10361
diff
changeset
|
656 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
|
657 { |
|
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
|
658 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
|
659 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
|
660 } |
| 7 | 661 did_throw = FALSE; |
| 662 need_rethrow = FALSE; | |
| 663 } | |
| 664 | |
| 665 /* | |
| 666 * Put an exception on the caught stack. | |
| 667 */ | |
|
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patch 8.2.0149: maintaining a Vim9 branch separately is more work
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
668 void |
|
7819
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
669 catch_exception(except_T *excp) |
| 7 | 670 { |
| 671 excp->caught = caught_stack; | |
| 672 caught_stack = excp; | |
|
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changeset
|
673 set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1); |
| 7 | 674 if (*excp->throw_name != NUL) |
| 675 { | |
| 676 if (excp->throw_lnum != 0) | |
| 273 | 677 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"), |
| 678 excp->throw_name, (long)excp->throw_lnum); | |
| 7 | 679 else |
| 273 | 680 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name); |
| 7 | 681 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 682 } | |
| 683 else | |
|
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parents:
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diff
changeset
|
684 // throw_name not set on an exception from a command that was typed. |
| 7 | 685 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 686 | |
| 687 if (p_verbose >= 13 || debug_break_level > 0) | |
| 688 { | |
| 689 int save_msg_silent = msg_silent; | |
| 690 | |
| 691 if (debug_break_level > 0) | |
|
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changeset
|
692 msg_silent = FALSE; // display messages |
| 293 | 693 else |
| 694 verbose_enter(); | |
| 7 | 695 ++no_wait_return; |
| 293 | 696 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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diff
changeset
|
697 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 698 |
|
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patch 8.1.0743: giving error messages is not flexible
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diff
changeset
|
699 smsg(_("Exception caught: %s"), excp->value); |
|
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parents:
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diff
changeset
|
700 msg_puts("\n"); // don't overwrite this either |
| 293 | 701 |
| 702 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 703 cmdline_row = msg_row; | |
| 7 | 704 --no_wait_return; |
| 705 if (debug_break_level > 0) | |
| 706 msg_silent = save_msg_silent; | |
| 293 | 707 else |
| 708 verbose_leave(); | |
| 7 | 709 } |
| 710 } | |
| 711 | |
| 712 /* | |
| 713 * Remove an exception from the caught stack. | |
| 714 */ | |
| 715 static void | |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
716 finish_exception(except_T *excp) |
| 7 | 717 { |
| 718 if (excp != caught_stack) | |
|
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commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
719 internal_error("finish_exception()"); |
| 7 | 720 caught_stack = caught_stack->caught; |
| 721 if (caught_stack != NULL) | |
| 722 { | |
|
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changeset
|
723 set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1); |
| 7 | 724 if (*caught_stack->throw_name != NUL) |
| 725 { | |
| 726 if (caught_stack->throw_lnum != 0) | |
| 273 | 727 vim_snprintf((char *)IObuff, IOSIZE, |
| 7 | 728 _("%s, line %ld"), caught_stack->throw_name, |
| 729 (long)caught_stack->throw_lnum); | |
| 730 else | |
| 273 | 731 vim_snprintf((char *)IObuff, IOSIZE, "%s", |
| 732 caught_stack->throw_name); | |
| 7 | 733 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 734 } | |
| 735 else | |
|
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736 // throw_name not set on an exception from a command that was |
|
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changeset
|
737 // typed. |
| 7 | 738 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 739 } | |
| 740 else | |
| 741 { | |
| 742 set_vim_var_string(VV_EXCEPTION, NULL, -1); | |
| 743 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 744 } | |
| 745 | |
|
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changeset
|
746 // Discard the exception, but use the finish message for 'verbose'. |
| 7 | 747 discard_exception(excp, TRUE); |
| 748 } | |
| 749 | |
| 750 /* | |
| 751 * Flags specifying the message displayed by report_pending. | |
| 752 */ | |
| 753 #define RP_MAKE 0 | |
| 754 #define RP_RESUME 1 | |
| 755 #define RP_DISCARD 2 | |
| 756 | |
| 757 /* | |
| 758 * Report information about something pending in a finally clause if required by | |
| 759 * the 'verbose' option or when debugging. "action" tells whether something is | |
| 760 * made pending or something pending is resumed or discarded. "pending" tells | |
| 761 * what is pending. "value" specifies the return value for a pending ":return" | |
| 762 * or the exception value for a pending exception. | |
| 763 */ | |
| 764 static void | |
|
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
765 report_pending(int action, int pending, void *value) |
| 7 | 766 { |
|
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diff
changeset
|
767 char *mesg; |
| 7 | 768 char *s; |
| 769 int save_msg_silent; | |
| 770 | |
| 771 | |
| 772 switch (action) | |
| 773 { | |
| 774 case RP_MAKE: | |
|
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changeset
|
775 mesg = _("%s made pending"); |
| 7 | 776 break; |
| 777 case RP_RESUME: | |
|
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changeset
|
778 mesg = _("%s resumed"); |
| 7 | 779 break; |
|
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diff
changeset
|
780 // case RP_DISCARD: |
| 7 | 781 default: |
|
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parents:
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diff
changeset
|
782 mesg = _("%s discarded"); |
| 7 | 783 break; |
| 784 } | |
| 785 | |
| 786 switch (pending) | |
| 787 { | |
| 788 case CSTP_NONE: | |
| 789 return; | |
| 790 | |
| 791 case CSTP_CONTINUE: | |
| 792 s = ":continue"; | |
| 793 break; | |
| 794 case CSTP_BREAK: | |
| 795 s = ":break"; | |
| 796 break; | |
| 797 case CSTP_FINISH: | |
| 798 s = ":finish"; | |
| 799 break; | |
| 800 case CSTP_RETURN: | |
|
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changeset
|
801 // ":return" command producing value, allocated |
| 7 | 802 s = (char *)get_return_cmd(value); |
| 803 break; | |
| 804 | |
| 805 default: | |
| 806 if (pending & CSTP_THROW) | |
| 807 { | |
|
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changeset
|
808 vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception")); |
|
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patch 8.2.0967: unnecessary type casts for vim_strnsave()
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parents:
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changeset
|
809 mesg = (char *)vim_strnsave(IObuff, STRLEN(IObuff) + 4); |
| 7 | 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"); | |
|
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817 else // if (pending & CSTP_INTERRUPT) |
| 7 | 818 s = _("Interrupt"); |
| 819 } | |
| 820 | |
| 821 save_msg_silent = msg_silent; | |
| 822 if (debug_break_level > 0) | |
|
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823 msg_silent = FALSE; // display messages |
| 7 | 824 ++no_wait_return; |
|
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825 msg_scroll = TRUE; // always scroll up, don't overwrite |
|
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826 smsg(mesg, s); |
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changeset
|
827 msg_puts("\n"); // don't overwrite this either |
| 7 | 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 | |
|
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Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
|
844 report_make_pending(int pending, void *value) |
| 7 | 845 { |
| 846 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 847 { |
| 848 if (debug_break_level <= 0) | |
| 849 verbose_enter(); | |
| 7 | 850 report_pending(RP_MAKE, pending, value); |
| 293 | 851 if (debug_break_level <= 0) |
| 852 verbose_leave(); | |
| 853 } | |
| 7 | 854 } |
| 855 | |
| 856 /* | |
| 857 * If something pending in a finally clause is resumed at the ":endtry", report | |
| 858 * it if required by the 'verbose' option or when debugging. | |
| 859 */ | |
|
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changeset
|
860 static void |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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diff
changeset
|
861 report_resume_pending(int pending, void *value) |
| 7 | 862 { |
| 863 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 864 { |
| 865 if (debug_break_level <= 0) | |
| 866 verbose_enter(); | |
| 7 | 867 report_pending(RP_RESUME, pending, value); |
| 293 | 868 if (debug_break_level <= 0) |
| 869 verbose_leave(); | |
| 870 } | |
| 7 | 871 } |
| 872 | |
| 873 /* | |
| 874 * If something pending in a finally clause is discarded, report it if required | |
| 875 * by the 'verbose' option or when debugging. | |
| 876 */ | |
|
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877 static void |
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diff
changeset
|
878 report_discard_pending(int pending, void *value) |
| 7 | 879 { |
| 880 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 881 { |
| 882 if (debug_break_level <= 0) | |
| 883 verbose_enter(); | |
| 7 | 884 report_pending(RP_DISCARD, pending, value); |
| 293 | 885 if (debug_break_level <= 0) |
| 886 verbose_leave(); | |
| 887 } | |
| 7 | 888 } |
| 889 | |
| 890 | |
| 891 /* | |
|
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changeset
|
892 * ":eval". |
|
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changeset
|
893 */ |
|
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parents:
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changeset
|
894 void |
|
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changeset
|
895 ex_eval(exarg_T *eap) |
|
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changeset
|
896 { |
|
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changeset
|
897 typval_T tv; |
|
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changeset
|
898 evalarg_T evalarg; |
|
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changeset
|
899 |
|
21040
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patch 8.2.1071: Vim9: no line break allowed inside a lambda
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changeset
|
900 CLEAR_FIELD(evalarg); |
|
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changeset
|
901 evalarg.eval_flags = eap->skip ? 0 : EVAL_EVALUATE; |
|
21058
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changeset
|
902 if (getline_equal(eap->getline, eap->cookie, getsourceline)) |
|
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diff
changeset
|
903 { |
|
111f877e63d9
patch 8.2.1080: Vim9: no line break allowed in a for loop
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changeset
|
904 evalarg.eval_getline = eap->getline; |
|
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changeset
|
905 evalarg.eval_cookie = eap->cookie; |
|
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changeset
|
906 } |
|
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changeset
|
907 |
|
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patch 8.2.1049: Vim9: leaking memory when using continuation line
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changeset
|
908 if (eval0(eap->arg, &tv, eap, &evalarg) == OK) |
|
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changeset
|
909 clear_tv(&tv); |
|
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|
910 |
|
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|
911 clear_evalarg(&evalarg, eap); |
|
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changeset
|
912 } |
|
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parents:
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changeset
|
913 |
|
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parents:
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diff
changeset
|
914 /* |
| 7 | 915 * ":if". |
| 916 */ | |
| 917 void | |
|
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diff
changeset
|
918 ex_if(exarg_T *eap) |
| 7 | 919 { |
| 920 int error; | |
| 921 int skip; | |
| 922 int result; | |
|
18904
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patch 8.2.0013: not using a typedef for condstack
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changeset
|
923 cstack_T *cstack = eap->cstack; |
| 7 | 924 |
| 925 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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changeset
|
926 eap->errmsg = N_("E579: :if nesting too deep"); |
| 7 | 927 else |
| 928 { | |
| 929 ++cstack->cs_idx; | |
| 930 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 931 | |
| 932 /* | |
| 933 * Don't do something after an error, interrupt, or throw, or when there | |
| 934 * is a surrounding conditional and it was not active. | |
| 935 */ | |
| 936 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 937 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 938 | |
|
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changeset
|
939 result = eval_to_bool(eap->arg, &error, eap, skip); |
| 7 | 940 |
| 941 if (!skip && !error) | |
| 942 { | |
| 943 if (result) | |
| 944 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 945 } | |
| 946 else | |
|
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947 // set TRUE, so this conditional will never get active |
| 7 | 948 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 949 } | |
| 950 } | |
| 951 | |
| 952 /* | |
| 953 * ":endif". | |
| 954 */ | |
| 955 void | |
|
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956 ex_endif(exarg_T *eap) |
| 7 | 957 { |
| 958 did_endif = TRUE; | |
| 959 if (eap->cstack->cs_idx < 0 | |
| 79 | 960 || (eap->cstack->cs_flags[eap->cstack->cs_idx] |
| 961 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
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962 eap->errmsg = N_(e_endif_without_if); |
| 7 | 963 else |
| 964 { | |
| 965 /* | |
| 966 * When debugging or a breakpoint was encountered, display the debug | |
| 967 * prompt (if not already done). This shows the user that an ":endif" | |
| 968 * is executed when the ":if" or a previous ":elseif" was not TRUE. | |
| 969 * Handle a ">quit" debug command as if an interrupt had occurred before | |
| 970 * the ":endif". That is, throw an interrupt exception if appropriate. | |
| 971 * Doing this here prevents an exception for a parsing error being | |
| 972 * discarded by throwing the interrupt exception later on. | |
| 973 */ | |
| 359 | 974 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE) |
| 975 && dbg_check_skipped(eap)) | |
| 7 | 976 (void)do_intthrow(eap->cstack); |
| 977 | |
| 978 --eap->cstack->cs_idx; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 /* | |
| 983 * ":else" and ":elseif". | |
| 984 */ | |
| 985 void | |
|
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986 ex_else(exarg_T *eap) |
| 7 | 987 { |
| 988 int error; | |
| 989 int skip; | |
| 990 int result; | |
|
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991 cstack_T *cstack = eap->cstack; |
| 7 | 992 |
| 993 /* | |
| 994 * Don't do something after an error, interrupt, or throw, or when there is | |
| 995 * a surrounding conditional and it was not active. | |
| 996 */ | |
| 997 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 998 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 999 | |
| 1000 if (cstack->cs_idx < 0 | |
| 75 | 1001 || (cstack->cs_flags[cstack->cs_idx] |
| 1002 & (CSF_WHILE | CSF_FOR | CSF_TRY))) | |
| 7 | 1003 { |
| 1004 if (eap->cmdidx == CMD_else) | |
| 1005 { | |
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1006 eap->errmsg = N_(e_else_without_if); |
| 7 | 1007 return; |
| 1008 } | |
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1009 eap->errmsg = N_(e_elseif_without_if); |
| 7 | 1010 skip = TRUE; |
| 1011 } | |
| 1012 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) | |
| 1013 { | |
| 1014 if (eap->cmdidx == CMD_else) | |
| 1015 { | |
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1016 eap->errmsg = N_("E583: multiple :else"); |
| 7 | 1017 return; |
| 1018 } | |
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1019 eap->errmsg = N_("E584: :elseif after :else"); |
| 7 | 1020 skip = TRUE; |
| 1021 } | |
| 1022 | |
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1023 // if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it |
| 7 | 1024 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) |
| 1025 { | |
| 1026 if (eap->errmsg == NULL) | |
| 1027 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
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1028 skip = TRUE; // don't evaluate an ":elseif" |
| 7 | 1029 } |
| 1030 else | |
| 1031 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE; | |
| 1032 | |
| 1033 /* | |
| 1034 * When debugging or a breakpoint was encountered, display the debug prompt | |
| 1035 * (if not already done). This shows the user that an ":else" or ":elseif" | |
| 1036 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle | |
| 1037 * a ">quit" debug command as if an interrupt had occurred before the | |
| 1038 * ":else" or ":elseif". That is, set "skip" and throw an interrupt | |
| 1039 * exception if appropriate. Doing this here prevents that an exception | |
| 1040 * for a parsing errors is discarded when throwing the interrupt exception | |
| 1041 * later on. | |
| 1042 */ | |
| 1043 if (!skip && dbg_check_skipped(eap) && got_int) | |
| 1044 { | |
| 1045 (void)do_intthrow(cstack); | |
| 1046 skip = TRUE; | |
| 1047 } | |
| 1048 | |
| 1049 if (eap->cmdidx == CMD_elseif) | |
| 1050 { | |
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1051 result = eval_to_bool(eap->arg, &error, eap, skip); |
|
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1052 |
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1053 // When throwing error exceptions, we want to throw always the first |
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1054 // of several errors in a row. This is what actually happens when |
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1055 // a conditional error was detected above and there is another failure |
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1056 // when parsing the expression. Since the skip flag is set in this |
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1057 // case, the parsing error will be ignored by emsg(). |
| 7 | 1058 if (!skip && !error) |
| 1059 { | |
| 1060 if (result) | |
| 1061 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 1062 else | |
| 1063 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 1064 } | |
| 1065 else if (eap->errmsg == NULL) | |
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1066 // set TRUE, so this conditional will never get active |
| 7 | 1067 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 1068 } | |
| 1069 else | |
| 1070 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE; | |
| 1071 } | |
| 1072 | |
| 1073 /* | |
| 75 | 1074 * Handle ":while" and ":for". |
| 7 | 1075 */ |
| 1076 void | |
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1077 ex_while(exarg_T *eap) |
| 7 | 1078 { |
| 1079 int error; | |
| 1080 int skip; | |
| 1081 int result; | |
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1082 cstack_T *cstack = eap->cstack; |
| 7 | 1083 |
| 1084 if (cstack->cs_idx == CSTACK_LEN - 1) | |
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1085 eap->errmsg = N_("E585: :while/:for nesting too deep"); |
| 7 | 1086 else |
| 1087 { | |
| 1088 /* | |
| 75 | 1089 * The loop flag is set when we have jumped back from the matching |
| 1090 * ":endwhile" or ":endfor". When not set, need to initialise this | |
| 1091 * cstack entry. | |
| 7 | 1092 */ |
| 75 | 1093 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) |
| 7 | 1094 { |
| 1095 ++cstack->cs_idx; | |
| 75 | 1096 ++cstack->cs_looplevel; |
| 7 | 1097 cstack->cs_line[cstack->cs_idx] = -1; |
| 1098 } | |
| 75 | 1099 cstack->cs_flags[cstack->cs_idx] = |
| 1100 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR; | |
| 7 | 1101 |
| 1102 /* | |
| 75 | 1103 * Don't do something after an error, interrupt, or throw, or when |
| 1104 * there is a surrounding conditional and it was not active. | |
| 7 | 1105 */ |
| 1106 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1107 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 75 | 1108 if (eap->cmdidx == CMD_while) |
| 1109 { | |
| 1110 /* | |
| 1111 * ":while bool-expr" | |
| 1112 */ | |
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1113 result = eval_to_bool(eap->arg, &error, eap, skip); |
| 75 | 1114 } |
| 1115 else | |
| 1116 { | |
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1117 void *fi; |
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1118 evalarg_T evalarg; |
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1119 |
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1120 CLEAR_FIELD(evalarg); |
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1121 evalarg.eval_flags = skip ? 0 : EVAL_EVALUATE; |
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1122 if (getline_equal(eap->getline, eap->cookie, getsourceline)) |
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1123 { |
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1124 evalarg.eval_getline = eap->getline; |
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1125 evalarg.eval_cookie = eap->cookie; |
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1126 } |
| 75 | 1127 |
| 1128 /* | |
| 1129 * ":for var in list-expr" | |
| 1130 */ | |
| 1131 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) | |
| 1132 { | |
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1133 // Jumping here from a ":continue" or ":endfor": use the |
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1134 // previously evaluated list. |
| 79 | 1135 fi = cstack->cs_forinfo[cstack->cs_idx]; |
| 75 | 1136 error = FALSE; |
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1137 |
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1138 // the "in expr" is not used, skip over it |
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1139 skip_for_lines(fi, &evalarg); |
| 75 | 1140 } |
| 1141 else | |
| 1142 { | |
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1143 // Evaluate the argument and get the info in a structure. |
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1144 fi = eval_for_line(eap->arg, &error, eap, &evalarg); |
| 79 | 1145 cstack->cs_forinfo[cstack->cs_idx] = fi; |
| 75 | 1146 } |
| 1147 | |
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1148 // use the element at the start of the list and advance |
| 75 | 1149 if (!error && fi != NULL && !skip) |
| 1150 result = next_for_item(fi, eap->arg); | |
| 1151 else | |
| 1152 result = FALSE; | |
| 1153 | |
| 1154 if (!result) | |
| 1155 { | |
| 1156 free_for_info(fi); | |
| 79 | 1157 cstack->cs_forinfo[cstack->cs_idx] = NULL; |
| 75 | 1158 } |
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1159 clear_evalarg(&evalarg, eap); |
| 75 | 1160 } |
| 7 | 1161 |
| 1162 /* | |
| 75 | 1163 * If this cstack entry was just initialised and is active, set the |
| 1164 * loop flag, so do_cmdline() will set the line number in cs_line[]. | |
| 1165 * If executing the command a second time, clear the loop flag. | |
| 7 | 1166 */ |
| 1167 if (!skip && !error && result) | |
| 1168 { | |
| 75 | 1169 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE); |
| 1170 cstack->cs_lflags ^= CSL_HAD_LOOP; | |
| 7 | 1171 } |
| 1172 else | |
| 1173 { | |
| 75 | 1174 cstack->cs_lflags &= ~CSL_HAD_LOOP; |
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1175 // If the ":while" evaluates to FALSE or ":for" is past the end of |
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1176 // the list, show the debug prompt at the ":endwhile"/":endfor" as |
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1177 // if there was a ":break" in a ":while"/":for" evaluating to |
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1178 // TRUE. |
| 7 | 1179 if (!skip && !error) |
| 1180 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE; | |
| 1181 } | |
| 1182 } | |
| 1183 } | |
| 1184 | |
| 1185 /* | |
| 1186 * ":continue" | |
| 1187 */ | |
| 1188 void | |
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1189 ex_continue(exarg_T *eap) |
| 7 | 1190 { |
| 1191 int idx; | |
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1192 cstack_T *cstack = eap->cstack; |
| 7 | 1193 |
| 75 | 1194 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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1195 eap->errmsg = N_(e_continue); |
| 7 | 1196 else |
| 1197 { | |
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1198 // Try to find the matching ":while". This might stop at a try |
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1199 // conditional not in its finally clause (which is then to be executed |
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1200 // next). Therefor, inactivate all conditionals except the ":while" |
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1201 // itself (if reached). |
| 75 | 1202 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 840 | 1203 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1204 { |
| 79 | 1205 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 7 | 1206 |
| 1207 /* | |
| 75 | 1208 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the |
| 7 | 1209 * matching ":while". |
| 1210 */ | |
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1211 cstack->cs_lflags |= CSL_HAD_CONT; // let do_cmdline() handle it |
| 7 | 1212 } |
| 1213 else | |
| 1214 { | |
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1215 // If a try conditional not in its finally clause is reached first, |
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1216 // make the ":continue" pending for execution at the ":endtry". |
| 7 | 1217 cstack->cs_pending[idx] = CSTP_CONTINUE; |
| 1218 report_make_pending(CSTP_CONTINUE, NULL); | |
| 1219 } | |
| 1220 } | |
| 1221 } | |
| 1222 | |
| 1223 /* | |
| 1224 * ":break" | |
| 1225 */ | |
| 1226 void | |
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1227 ex_break(exarg_T *eap) |
| 7 | 1228 { |
| 1229 int idx; | |
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1230 cstack_T *cstack = eap->cstack; |
| 7 | 1231 |
| 75 | 1232 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
|
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1233 eap->errmsg = N_(e_break); |
| 7 | 1234 else |
| 1235 { | |
|
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1236 // Inactivate conditionals until the matching ":while" or a try |
|
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1237 // conditional not in its finally clause (which is then to be |
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1238 // executed next) is found. In the latter case, make the ":break" |
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1239 // pending for execution at the ":endtry". |
| 75 | 1240 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE); |
| 840 | 1241 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1242 { |
| 1243 cstack->cs_pending[idx] = CSTP_BREAK; | |
| 1244 report_make_pending(CSTP_BREAK, NULL); | |
| 1245 } | |
| 1246 } | |
| 1247 } | |
| 1248 | |
| 1249 /* | |
| 75 | 1250 * ":endwhile" and ":endfor" |
| 7 | 1251 */ |
| 1252 void | |
|
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1253 ex_endwhile(exarg_T *eap) |
| 7 | 1254 { |
|
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1255 cstack_T *cstack = eap->cstack; |
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1256 int idx; |
|
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1257 char *err; |
|
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1258 int csf; |
|
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1259 int fl; |
| 7 | 1260 |
| 75 | 1261 if (eap->cmdidx == CMD_endwhile) |
| 1262 { | |
| 1263 err = e_while; | |
| 1264 csf = CSF_WHILE; | |
| 1265 } | |
| 1266 else | |
| 1267 { | |
| 1268 err = e_for; | |
| 1269 csf = CSF_FOR; | |
| 1270 } | |
| 1271 | |
| 1272 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) | |
| 1273 eap->errmsg = err; | |
| 7 | 1274 else |
| 1275 { | |
| 75 | 1276 fl = cstack->cs_flags[cstack->cs_idx]; |
| 1277 if (!(fl & csf)) | |
| 7 | 1278 { |
|
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1279 // If we are in a ":while" or ":for" but used the wrong endloop |
|
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1280 // command, do not rewind to the next enclosing ":for"/":while". |
| 75 | 1281 if (fl & CSF_WHILE) |
|
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1282 eap->errmsg = _("E732: Using :endfor with :while"); |
| 75 | 1283 else if (fl & CSF_FOR) |
|
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1284 eap->errmsg = _("E733: Using :endwhile with :for"); |
| 114 | 1285 } |
| 1286 if (!(fl & (CSF_WHILE | CSF_FOR))) | |
| 1287 { | |
| 1288 if (!(fl & CSF_TRY)) | |
| 75 | 1289 eap->errmsg = e_endif; |
| 1290 else if (fl & CSF_FINALLY) | |
| 1291 eap->errmsg = e_endtry; | |
|
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1292 // Try to find the matching ":while" and report what's missing. |
| 7 | 1293 for (idx = cstack->cs_idx; idx > 0; --idx) |
| 1294 { | |
| 75 | 1295 fl = cstack->cs_flags[idx]; |
| 1296 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) | |
| 7 | 1297 { |
|
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1298 // Give up at a try conditional not in its finally clause. |
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1299 // Ignore the ":endwhile"/":endfor". |
| 75 | 1300 eap->errmsg = err; |
| 7 | 1301 return; |
| 1302 } | |
| 75 | 1303 if (fl & csf) |
| 7 | 1304 break; |
| 1305 } | |
|
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1306 // Cleanup and rewind all contained (and unclosed) conditionals. |
| 75 | 1307 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 7 | 1308 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 1309 } | |
| 1310 | |
| 1311 /* | |
| 1312 * When debugging or a breakpoint was encountered, display the debug | |
| 1313 * prompt (if not already done). This shows the user that an | |
| 75 | 1314 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or |
| 1315 * after a ":break". Handle a ">quit" debug command as if an | |
| 1316 * interrupt had occurred before the ":endwhile"/":endfor". That is, | |
| 1317 * throw an interrupt exception if appropriate. Doing this here | |
| 1318 * prevents that an exception for a parsing error is discarded when | |
| 1319 * throwing the interrupt exception later on. | |
| 7 | 1320 */ |
| 1321 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE | |
| 1322 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE) | |
| 1323 && dbg_check_skipped(eap)) | |
| 1324 (void)do_intthrow(cstack); | |
| 1325 | |
| 1326 /* | |
| 75 | 1327 * Set loop flag, so do_cmdline() will jump back to the matching |
| 1328 * ":while" or ":for". | |
| 7 | 1329 */ |
| 75 | 1330 cstack->cs_lflags |= CSL_HAD_ENDLOOP; |
| 7 | 1331 } |
| 1332 } | |
| 1333 | |
| 1334 | |
| 1335 /* | |
| 1336 * ":throw expr" | |
| 1337 */ | |
| 1338 void | |
|
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1339 ex_throw(exarg_T *eap) |
| 7 | 1340 { |
| 1341 char_u *arg = eap->arg; | |
| 1342 char_u *value; | |
| 1343 | |
| 1344 if (*arg != NUL && *arg != '|' && *arg != '\n') | |
|
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1345 value = eval_to_string_skip(arg, eap, eap->skip); |
| 7 | 1346 else |
| 1347 { | |
|
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1348 emsg(_(e_argreq)); |
| 7 | 1349 value = NULL; |
| 1350 } | |
| 1351 | |
|
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1352 // On error or when an exception is thrown during argument evaluation, do |
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1353 // not throw. |
| 7 | 1354 if (!eap->skip && value != NULL) |
| 1355 { | |
| 1356 if (throw_exception(value, ET_USER, NULL) == FAIL) | |
| 1357 vim_free(value); | |
| 1358 else | |
| 1359 do_throw(eap->cstack); | |
| 1360 } | |
| 1361 } | |
| 1362 | |
| 1363 /* | |
| 21 | 1364 * Throw the current exception through the specified cstack. Common routine |
| 1365 * for ":throw" (user exception) and error and interrupt exceptions. Also | |
| 1366 * used for rethrowing an uncaught exception. | |
| 7 | 1367 */ |
| 1368 void | |
|
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1369 do_throw(cstack_T *cstack) |
| 7 | 1370 { |
| 1371 int idx; | |
| 1372 int inactivate_try = FALSE; | |
| 1373 | |
| 1374 /* | |
| 1375 * Cleanup and inactivate up to the next surrounding try conditional that | |
| 1376 * is not in its finally clause. Normally, do not inactivate the try | |
| 1377 * conditional itself, so that its ACTIVE flag can be tested below. But | |
| 1378 * if a previous error or interrupt has not been converted to an exception, | |
| 1379 * inactivate the try conditional, too, as if the conversion had been done, | |
| 21 | 1380 * and reset the did_emsg or got_int flag, so this won't happen again at |
| 1381 * the next surrounding try conditional. | |
| 7 | 1382 */ |
| 1880 | 1383 #ifndef THROW_ON_ERROR_TRUE |
| 7 | 1384 if (did_emsg && !THROW_ON_ERROR) |
| 1385 { | |
| 1386 inactivate_try = TRUE; | |
| 1387 did_emsg = FALSE; | |
| 1388 } | |
| 1880 | 1389 #endif |
| 1390 #ifndef THROW_ON_INTERRUPT_TRUE | |
| 7 | 1391 if (got_int && !THROW_ON_INTERRUPT) |
| 1392 { | |
| 1393 inactivate_try = TRUE; | |
| 1394 got_int = FALSE; | |
| 1395 } | |
| 1880 | 1396 #endif |
| 7 | 1397 idx = cleanup_conditionals(cstack, 0, inactivate_try); |
| 1398 if (idx >= 0) | |
| 1399 { | |
| 1400 /* | |
| 1401 * If this try conditional is active and we are before its first | |
| 21 | 1402 * ":catch", set THROWN so that the ":catch" commands will check |
| 1403 * whether the exception matches. When the exception came from any of | |
| 1404 * the catch clauses, it will be made pending at the ":finally" (if | |
| 1405 * present) and rethrown at the ":endtry". This will also happen if | |
| 1406 * the try conditional is inactive. This is the case when we are | |
| 1407 * throwing an exception due to an error or interrupt on the way from | |
| 1408 * a preceding ":continue", ":break", ":return", ":finish", error or | |
| 1409 * interrupt (not converted to an exception) to the finally clause or | |
| 1410 * from a preceding throw of a user or error or interrupt exception to | |
| 1411 * the matching catch clause or the finally clause. | |
| 7 | 1412 */ |
| 1413 if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1414 { | |
| 1415 if (cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 1416 cstack->cs_flags[idx] |= CSF_THROWN; | |
| 1417 else | |
|
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1418 // THROWN may have already been set for a catchable exception |
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1419 // that has been discarded. Ensure it is reset for the new |
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1420 // exception. |
| 7 | 1421 cstack->cs_flags[idx] &= ~CSF_THROWN; |
| 1422 } | |
| 1423 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 1424 cstack->cs_exception[idx] = current_exception; | |
| 1425 } | |
| 1426 #if 0 | |
|
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1427 // TODO: Add optimization below. Not yet done because of interface |
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1428 // problems to eval.c and ex_cmds2.c. (Servatius) |
| 7 | 1429 else |
| 1430 { | |
| 1431 /* | |
| 1432 * There are no catch clauses to check or finally clauses to execute. | |
| 1433 * End the current script or function. The exception will be rethrown | |
| 1434 * in the caller. | |
| 1435 */ | |
| 1436 if (getline_equal(eap->getline, eap->cookie, get_func_line)) | |
| 1437 current_funccal->returned = TRUE; | |
| 1438 elseif (eap->get_func_line == getsourceline) | |
| 1439 ((struct source_cookie *)eap->cookie)->finished = TRUE; | |
| 1440 } | |
| 1441 #endif | |
| 1442 | |
| 1443 did_throw = TRUE; | |
| 1444 } | |
| 1445 | |
| 1446 /* | |
| 1447 * ":try" | |
| 1448 */ | |
| 1449 void | |
|
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1450 ex_try(exarg_T *eap) |
| 7 | 1451 { |
| 1452 int skip; | |
|
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1453 cstack_T *cstack = eap->cstack; |
| 7 | 1454 |
| 1455 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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1456 eap->errmsg = N_("E601: :try nesting too deep"); |
| 7 | 1457 else |
| 1458 { | |
| 1459 ++cstack->cs_idx; | |
| 1460 ++cstack->cs_trylevel; | |
| 1461 cstack->cs_flags[cstack->cs_idx] = CSF_TRY; | |
| 1462 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE; | |
| 1463 | |
| 1464 /* | |
| 1465 * Don't do something after an error, interrupt, or throw, or when there | |
| 1466 * is a surrounding conditional and it was not active. | |
| 1467 */ | |
| 1468 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1469 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1470 | |
| 1471 if (!skip) | |
| 1472 { | |
|
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1473 // Set ACTIVE and TRUE. TRUE means that the corresponding ":catch" |
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1474 // commands should check for a match if an exception is thrown and |
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1475 // that the finally clause needs to be executed. |
| 7 | 1476 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE; |
| 1477 | |
| 1478 /* | |
| 1479 * ":silent!", even when used in a try conditional, disables | |
| 1480 * displaying of error messages and conversion of errors to | |
| 1481 * exceptions. When the silent commands again open a try | |
| 1482 * conditional, save "emsg_silent" and reset it so that errors are | |
| 1483 * again converted to exceptions. The value is restored when that | |
| 1484 * try conditional is left. If it is left normally, the commands | |
| 1485 * following the ":endtry" are again silent. If it is left by | |
| 1486 * a ":continue", ":break", ":return", or ":finish", the commands | |
| 1487 * executed next are again silent. If it is left due to an | |
| 1488 * aborting error, an interrupt, or an exception, restoring | |
| 1489 * "emsg_silent" does not matter since we are already in the | |
| 1490 * aborting state and/or the exception has already been thrown. | |
| 1491 * The effect is then just freeing the memory that was allocated | |
| 1492 * to save the value. | |
| 1493 */ | |
| 1494 if (emsg_silent) | |
| 1495 { | |
| 1496 eslist_T *elem; | |
| 1497 | |
|
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1498 elem = ALLOC_ONE(struct eslist_elem); |
| 7 | 1499 if (elem == NULL) |
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1500 emsg(_(e_outofmem)); |
| 7 | 1501 else |
| 1502 { | |
| 1503 elem->saved_emsg_silent = emsg_silent; | |
| 1504 elem->next = cstack->cs_emsg_silent_list; | |
| 1505 cstack->cs_emsg_silent_list = elem; | |
| 1506 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT; | |
| 1507 emsg_silent = 0; | |
| 1508 } | |
| 1509 } | |
| 1510 } | |
| 1511 | |
| 1512 } | |
| 1513 } | |
| 1514 | |
| 1515 /* | |
| 1516 * ":catch /{pattern}/" and ":catch" | |
| 1517 */ | |
| 1518 void | |
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1519 ex_catch(exarg_T *eap) |
| 7 | 1520 { |
| 1521 int idx = 0; | |
| 1522 int give_up = FALSE; | |
| 1523 int skip = FALSE; | |
| 1524 int caught = FALSE; | |
| 1525 char_u *end; | |
| 1526 int save_char = 0; | |
| 1527 char_u *save_cpo; | |
| 1528 regmatch_T regmatch; | |
| 1529 int prev_got_int; | |
|
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1530 cstack_T *cstack = eap->cstack; |
| 7 | 1531 char_u *pat; |
| 1532 | |
| 1533 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1534 { | |
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1535 eap->errmsg = e_catch; |
| 7 | 1536 give_up = TRUE; |
| 1537 } | |
| 1538 else | |
| 1539 { | |
| 1540 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1541 { | |
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1542 // Report what's missing if the matching ":try" is not in its |
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1543 // finally clause. |
| 75 | 1544 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1545 skip = TRUE; |
| 1546 } | |
| 1547 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1548 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1549 break; | |
| 1550 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1551 { | |
|
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1552 // Give up for a ":catch" after ":finally" and ignore it. |
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1553 // Just parse. |
|
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1554 eap->errmsg = N_("E604: :catch after :finally"); |
| 7 | 1555 give_up = TRUE; |
| 1556 } | |
| 79 | 1557 else |
| 75 | 1558 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1559 &cstack->cs_looplevel); | |
| 7 | 1560 } |
| 1561 | |
|
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diff
changeset
|
1562 if (ends_excmd2(eap->cmd, eap->arg)) // no argument, catch all errors |
| 7 | 1563 { |
| 1564 pat = (char_u *)".*"; | |
| 1565 end = NULL; | |
| 1566 eap->nextcmd = find_nextcmd(eap->arg); | |
| 1567 } | |
| 1568 else | |
| 1569 { | |
| 1570 pat = eap->arg + 1; | |
|
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|
1571 end = skip_regexp_err(pat, *eap->arg, TRUE); |
|
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1572 if (end == NULL) |
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1573 give_up = TRUE; |
| 7 | 1574 } |
| 1575 | |
| 1576 if (!give_up) | |
| 1577 { | |
| 1578 /* | |
| 1579 * Don't do something when no exception has been thrown or when the | |
| 1580 * corresponding try block never got active (because of an inactive | |
| 1581 * surrounding conditional or after an error or interrupt or throw). | |
| 1582 */ | |
| 1583 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE)) | |
| 1584 skip = TRUE; | |
| 1585 | |
| 1586 /* | |
| 1587 * Check for a match only if an exception is thrown but not caught by | |
| 1588 * a previous ":catch". An exception that has replaced a discarded | |
| 1589 * exception is not checked (THROWN is not set then). | |
| 1590 */ | |
| 1591 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN) | |
| 1592 && !(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1593 { | |
|
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|
1594 if (end != NULL && *end != NUL |
|
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|
1595 && !ends_excmd2(end, skipwhite(end + 1))) |
| 7 | 1596 { |
|
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|
1597 emsg(_(e_trailing)); |
| 7 | 1598 return; |
| 1599 } | |
| 1600 | |
|
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1601 // When debugging or a breakpoint was encountered, display the |
|
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|
1602 // debug prompt (if not already done) before checking for a match. |
|
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1603 // This is a helpful hint for the user when the regular expression |
|
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1604 // matching fails. Handle a ">quit" debug command as if an |
|
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|
1605 // interrupt had occurred before the ":catch". That is, discard |
|
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1606 // the original exception, replace it by an interrupt exception, |
|
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1607 // and don't catch it in this try block. |
| 7 | 1608 if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) |
| 1609 { | |
|
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1610 // Terminate the pattern and avoid the 'l' flag in 'cpoptions' |
|
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1611 // while compiling it. |
| 7 | 1612 if (end != NULL) |
| 1613 { | |
| 1614 save_char = *end; | |
| 1615 *end = NUL; | |
| 1616 } | |
| 1617 save_cpo = p_cpo; | |
| 1618 p_cpo = (char_u *)""; | |
|
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1619 // Disable error messages, it will make current_exception |
|
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1620 // invalid. |
|
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1621 ++emsg_off; |
| 1333 | 1622 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); |
|
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|
1623 --emsg_off; |
| 7 | 1624 regmatch.rm_ic = FALSE; |
| 1625 if (end != NULL) | |
| 1626 *end = save_char; | |
| 1627 p_cpo = save_cpo; | |
| 1628 if (regmatch.regprog == NULL) | |
|
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|
1629 semsg(_(e_invarg2), pat); |
| 7 | 1630 else |
| 1631 { | |
| 1632 /* | |
| 1633 * Save the value of got_int and reset it. We don't want | |
| 1634 * a previous interruption cancel matching, only hitting | |
| 1635 * CTRL-C while matching should abort it. | |
| 1636 */ | |
| 1637 prev_got_int = got_int; | |
| 1638 got_int = FALSE; | |
|
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1639 caught = vim_regexec_nl(®match, |
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1640 (char_u *)current_exception->value, (colnr_T)0); |
| 7 | 1641 got_int |= prev_got_int; |
|
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1642 vim_regfree(regmatch.regprog); |
| 7 | 1643 } |
| 1644 } | |
| 1645 } | |
| 1646 | |
| 1647 if (caught) | |
| 1648 { | |
|
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1649 // Make this ":catch" clause active and reset did_emsg, got_int, |
|
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|
1650 // and did_throw. Put the exception on the caught stack. |
| 7 | 1651 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT; |
| 1652 did_emsg = got_int = did_throw = FALSE; | |
| 1653 catch_exception((except_T *)cstack->cs_exception[idx]); | |
|
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1654 // It's mandatory that the current exception is stored in the cstack |
|
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1655 // so that it can be discarded at the next ":catch", ":finally", or |
|
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1656 // ":endtry" or when the catch clause is left by a ":continue", |
|
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1657 // ":break", ":return", ":finish", error, interrupt, or another |
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1658 // exception. |
| 7 | 1659 if (cstack->cs_exception[cstack->cs_idx] != current_exception) |
|
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|
1660 internal_error("ex_catch()"); |
| 7 | 1661 } |
| 1662 else | |
| 1663 { | |
| 1664 /* | |
| 1665 * If there is a preceding catch clause and it caught the exception, | |
| 1666 * finish the exception now. This happens also after errors except | |
| 1667 * when this ":catch" was after the ":finally" or not within | |
| 1668 * a ":try". Make the try conditional inactive so that the | |
| 1669 * following catch clauses are skipped. On an error or interrupt | |
| 1670 * after the preceding try block or catch clause was left by | |
| 1671 * a ":continue", ":break", ":return", or ":finish", discard the | |
| 1672 * pending action. | |
| 1673 */ | |
| 1674 cleanup_conditionals(cstack, CSF_TRY, TRUE); | |
| 1675 } | |
| 1676 } | |
| 1677 | |
| 1678 if (end != NULL) | |
| 1679 eap->nextcmd = find_nextcmd(end); | |
| 1680 } | |
| 1681 | |
| 1682 /* | |
| 1683 * ":finally" | |
| 1684 */ | |
| 1685 void | |
|
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1686 ex_finally(exarg_T *eap) |
| 7 | 1687 { |
| 1688 int idx; | |
| 1689 int skip = FALSE; | |
| 1690 int pending = CSTP_NONE; | |
|
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1691 cstack_T *cstack = eap->cstack; |
| 7 | 1692 |
| 1693 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1694 eap->errmsg = e_finally; |
| 7 | 1695 else |
| 1696 { | |
| 1697 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1698 { | |
| 75 | 1699 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1700 for (idx = cstack->cs_idx - 1; idx > 0; --idx) |
| 1701 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1702 break; | |
|
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1703 // Make this error pending, so that the commands in the following |
|
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1704 // finally clause can be executed. This overrules also a pending |
|
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1705 // ":continue", ":break", ":return", or ":finish". |
| 7 | 1706 pending = CSTP_ERROR; |
| 1707 } | |
| 1708 else | |
| 1709 idx = cstack->cs_idx; | |
| 1710 | |
| 1711 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1712 { | |
|
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1713 // Give up for a multiple ":finally" and ignore it. |
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1714 eap->errmsg = e_finally_dup; |
| 7 | 1715 return; |
| 1716 } | |
| 79 | 1717 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 75 | 1718 &cstack->cs_looplevel); |
| 7 | 1719 |
| 1720 /* | |
| 1721 * Don't do something when the corresponding try block never got active | |
| 1722 * (because of an inactive surrounding conditional or after an error or | |
| 1723 * interrupt or throw) or for a ":finally" without ":try" or a multiple | |
| 1724 * ":finally". After every other error (did_emsg or the conditional | |
| 1725 * errors detected above) or after an interrupt (got_int) or an | |
| 1726 * exception (did_throw), the finally clause must be executed. | |
| 1727 */ | |
| 1728 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1729 | |
| 1730 if (!skip) | |
| 1731 { | |
|
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1732 // When debugging or a breakpoint was encountered, display the |
|
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1733 // debug prompt (if not already done). The user then knows that the |
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1734 // finally clause is executed. |
| 7 | 1735 if (dbg_check_skipped(eap)) |
| 1736 { | |
|
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1737 // Handle a ">quit" debug command as if an interrupt had |
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1738 // occurred before the ":finally". That is, discard the |
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1739 // original exception and replace it by an interrupt |
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1740 // exception. |
| 7 | 1741 (void)do_intthrow(cstack); |
| 1742 } | |
| 1743 | |
| 1744 /* | |
| 1745 * If there is a preceding catch clause and it caught the exception, | |
| 1746 * finish the exception now. This happens also after errors except | |
| 1747 * when this is a multiple ":finally" or one not within a ":try". | |
| 1748 * After an error or interrupt, this also discards a pending | |
| 1749 * ":continue", ":break", ":finish", or ":return" from the preceding | |
| 1750 * try block or catch clause. | |
| 1751 */ | |
| 1752 cleanup_conditionals(cstack, CSF_TRY, FALSE); | |
| 1753 | |
| 1754 /* | |
| 1755 * Make did_emsg, got_int, did_throw pending. If set, they overrule | |
| 1756 * a pending ":continue", ":break", ":return", or ":finish". Then | |
| 1757 * we have particularly to discard a pending return value (as done | |
| 1758 * by the call to cleanup_conditionals() above when did_emsg or | |
| 1759 * got_int is set). The pending values are restored by the | |
| 1760 * ":endtry", except if there is a new error, interrupt, exception, | |
| 1761 * ":continue", ":break", ":return", or ":finish" in the following | |
| 75 | 1762 * finally clause. A missing ":endwhile", ":endfor" or ":endif" |
| 1763 * detected here is treated as if did_emsg and did_throw had | |
| 1764 * already been set, respectively in case that the error is not | |
| 1765 * converted to an exception, did_throw had already been unset. | |
| 1766 * We must not set did_emsg here since that would suppress the | |
| 1767 * error message. | |
| 7 | 1768 */ |
| 1769 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) | |
| 1770 { | |
| 1771 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) | |
| 1772 { | |
| 1773 report_discard_pending(CSTP_RETURN, | |
| 68 | 1774 cstack->cs_rettv[cstack->cs_idx]); |
| 1775 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]); | |
| 7 | 1776 } |
| 1777 if (pending == CSTP_ERROR && !did_emsg) | |
| 1778 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0; | |
| 1779 else | |
| 1780 pending |= did_throw ? CSTP_THROW : 0; | |
| 1781 pending |= did_emsg ? CSTP_ERROR : 0; | |
| 1782 pending |= got_int ? CSTP_INTERRUPT : 0; | |
| 1783 cstack->cs_pending[cstack->cs_idx] = pending; | |
| 1784 | |
|
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1785 // It's mandatory that the current exception is stored in the |
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1786 // cstack so that it can be rethrown at the ":endtry" or be |
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1787 // discarded if the finally clause is left by a ":continue", |
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1788 // ":break", ":return", ":finish", error, interrupt, or another |
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1789 // exception. When emsg() is called for a missing ":endif" or |
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1790 // a missing ":endwhile"/":endfor" detected here, the |
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1791 // exception will be discarded. |
| 79 | 1792 if (did_throw && cstack->cs_exception[cstack->cs_idx] |
| 1793 != current_exception) | |
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1794 internal_error("ex_finally()"); |
| 7 | 1795 } |
| 1796 | |
| 1797 /* | |
| 75 | 1798 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg, |
| 22 | 1799 * got_int, and did_throw and make the finally clause active. |
| 1800 * This will happen after emsg() has been called for a missing | |
| 75 | 1801 * ":endif" or a missing ":endwhile"/":endfor" detected here, so |
| 1802 * that the following finally clause will be executed even then. | |
| 7 | 1803 */ |
| 75 | 1804 cstack->cs_lflags |= CSL_HAD_FINA; |
| 7 | 1805 } |
| 1806 } | |
| 1807 } | |
| 1808 | |
| 1809 /* | |
| 1810 * ":endtry" | |
| 1811 */ | |
| 1812 void | |
|
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1813 ex_endtry(exarg_T *eap) |
| 7 | 1814 { |
| 1815 int idx; | |
| 1816 int skip; | |
| 1817 int rethrow = FALSE; | |
| 1818 int pending = CSTP_NONE; | |
| 68 | 1819 void *rettv = NULL; |
|
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1820 cstack_T *cstack = eap->cstack; |
| 7 | 1821 |
| 1822 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1823 eap->errmsg = e_no_endtry; |
| 7 | 1824 else |
| 1825 { | |
| 1826 /* | |
| 1827 * Don't do something after an error, interrupt or throw in the try | |
| 1828 * block, catch clause, or finally clause preceding this ":endtry" or | |
| 1829 * when an error or interrupt occurred after a ":continue", ":break", | |
| 1830 * ":return", or ":finish" in a try block or catch clause preceding this | |
| 1831 * ":endtry" or when the try block never got active (because of an | |
| 1832 * inactive surrounding conditional or after an error or interrupt or | |
| 1833 * throw) or when there is a surrounding conditional and it has been | |
| 1834 * made inactive by a ":continue", ":break", ":return", or ":finish" in | |
| 1835 * the finally clause. The latter case need not be tested since then | |
| 1836 * anything pending has already been discarded. */ | |
| 1837 skip = did_emsg || got_int || did_throw || | |
| 1838 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1839 | |
| 1840 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1841 { | |
| 75 | 1842 eap->errmsg = get_end_emsg(cstack); |
|
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1843 // Find the matching ":try" and report what's missing. |
| 7 | 1844 idx = cstack->cs_idx; |
| 1845 do | |
| 1846 --idx; | |
| 1847 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY)); | |
| 75 | 1848 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1849 &cstack->cs_looplevel); | |
| 7 | 1850 skip = TRUE; |
| 1851 | |
| 1852 /* | |
| 1853 * If an exception is being thrown, discard it to prevent it from | |
| 1854 * being rethrown at the end of this function. It would be | |
| 1855 * discarded by the error message, anyway. Resets did_throw. | |
| 1856 * This does not affect the script termination due to the error | |
| 1857 * since "trylevel" is decremented after emsg() has been called. | |
| 1858 */ | |
| 1859 if (did_throw) | |
| 1860 discard_current_exception(); | |
| 1861 } | |
| 1862 else | |
| 1863 { | |
| 1864 idx = cstack->cs_idx; | |
| 1865 | |
| 1866 /* | |
| 1867 * If we stopped with the exception currently being thrown at this | |
| 1868 * try conditional since we didn't know that it doesn't have | |
| 1869 * a finally clause, we need to rethrow it after closing the try | |
| 1870 * conditional. | |
| 1871 */ | |
| 1872 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE) | |
| 1873 && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1874 rethrow = TRUE; | |
| 1875 } | |
| 1876 | |
|
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1877 // If there was no finally clause, show the user when debugging or |
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1878 // a breakpoint was encountered that the end of the try conditional has |
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1879 // been reached: display the debug prompt (if not already done). Do |
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1880 // this on normal control flow or when an exception was thrown, but not |
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1881 // on an interrupt or error not converted to an exception or when |
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1882 // a ":break", ":continue", ":return", or ":finish" is pending. These |
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1883 // actions are carried out immediately. |
| 7 | 1884 if ((rethrow || (!skip |
| 1885 && !(cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1886 && !cstack->cs_pending[idx])) | |
| 1887 && dbg_check_skipped(eap)) | |
| 1888 { | |
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1889 // Handle a ">quit" debug command as if an interrupt had occurred |
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1890 // before the ":endtry". That is, throw an interrupt exception and |
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1891 // set "skip" and "rethrow". |
| 7 | 1892 if (got_int) |
| 1893 { | |
| 1894 skip = TRUE; | |
| 1895 (void)do_intthrow(cstack); | |
|
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1896 // The do_intthrow() call may have reset did_throw or |
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1897 // cstack->cs_pending[idx]. |
| 7 | 1898 rethrow = FALSE; |
| 1899 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1900 rethrow = TRUE; | |
| 1901 } | |
| 1902 } | |
| 1903 | |
| 1904 /* | |
| 1905 * If a ":return" is pending, we need to resume it after closing the | |
| 1906 * try conditional; remember the return value. If there was a finally | |
| 1907 * clause making an exception pending, we need to rethrow it. Make it | |
| 1908 * the exception currently being thrown. | |
| 1909 */ | |
| 1910 if (!skip) | |
| 1911 { | |
| 1912 pending = cstack->cs_pending[idx]; | |
| 1913 cstack->cs_pending[idx] = CSTP_NONE; | |
| 1914 if (pending == CSTP_RETURN) | |
| 68 | 1915 rettv = cstack->cs_rettv[idx]; |
| 7 | 1916 else if (pending & CSTP_THROW) |
| 1917 current_exception = cstack->cs_exception[idx]; | |
| 1918 } | |
| 1919 | |
| 1920 /* | |
| 1921 * Discard anything pending on an error, interrupt, or throw in the | |
| 1922 * finally clause. If there was no ":finally", discard a pending | |
| 1923 * ":continue", ":break", ":return", or ":finish" if an error or | |
| 1924 * interrupt occurred afterwards, but before the ":endtry" was reached. | |
| 1925 * If an exception was caught by the last of the catch clauses and there | |
| 1926 * was no finally clause, finish the exception now. This happens also | |
| 1927 * after errors except when this ":endtry" is not within a ":try". | |
| 1928 * Restore "emsg_silent" if it has been reset by this try conditional. | |
| 1929 */ | |
| 840 | 1930 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE); |
| 7 | 1931 |
| 1932 --cstack->cs_idx; | |
| 1933 --cstack->cs_trylevel; | |
| 1934 | |
| 1935 if (!skip) | |
| 1936 { | |
| 1937 report_resume_pending(pending, | |
| 68 | 1938 (pending == CSTP_RETURN) ? rettv : |
| 7 | 1939 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 1940 switch (pending) | |
| 1941 { | |
| 1942 case CSTP_NONE: | |
| 1943 break; | |
| 1944 | |
|
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1945 // Reactivate a pending ":continue", ":break", ":return", |
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1946 // ":finish" from the try block or a catch clause of this try |
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1947 // conditional. This is skipped, if there was an error in an |
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1948 // (unskipped) conditional command or an interrupt afterwards |
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1949 // or if the finally clause is present and executed a new error, |
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1950 // interrupt, throw, ":continue", ":break", ":return", or |
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1951 // ":finish". |
| 7 | 1952 case CSTP_CONTINUE: |
| 1953 ex_continue(eap); | |
| 1954 break; | |
| 1955 case CSTP_BREAK: | |
| 1956 ex_break(eap); | |
| 1957 break; | |
| 1958 case CSTP_RETURN: | |
| 68 | 1959 do_return(eap, FALSE, FALSE, rettv); |
| 7 | 1960 break; |
| 1961 case CSTP_FINISH: | |
| 1962 do_finish(eap, FALSE); | |
| 1963 break; | |
| 1964 | |
|
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1965 // When the finally clause was entered due to an error, |
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1966 // interrupt or throw (as opposed to a ":continue", ":break", |
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1967 // ":return", or ":finish"), restore the pending values of |
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1968 // did_emsg, got_int, and did_throw. This is skipped, if there |
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1969 // was a new error, interrupt, throw, ":continue", ":break", |
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1970 // ":return", or ":finish". in the finally clause. |
| 7 | 1971 default: |
| 1972 if (pending & CSTP_ERROR) | |
| 1973 did_emsg = TRUE; | |
| 1974 if (pending & CSTP_INTERRUPT) | |
| 1975 got_int = TRUE; | |
| 1976 if (pending & CSTP_THROW) | |
| 1977 rethrow = TRUE; | |
| 1978 break; | |
| 1979 } | |
| 1980 } | |
| 1981 | |
| 1982 if (rethrow) | |
|
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1983 // Rethrow the current exception (within this cstack). |
| 7 | 1984 do_throw(cstack); |
| 1985 } | |
| 1986 } | |
| 1987 | |
| 1988 /* | |
| 36 | 1989 * enter_cleanup() and leave_cleanup() |
| 1990 * | |
| 1991 * Functions to be called before/after invoking a sequence of autocommands for | |
| 1992 * cleanup for a failed command. (Failure means here that a call to emsg() | |
| 1993 * has been made, an interrupt occurred, or there is an uncaught exception | |
| 1994 * from a previous autocommand execution of the same command.) | |
| 24 | 1995 * |
| 36 | 1996 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same |
| 1997 * pointer to leave_cleanup(). The cleanup_T structure stores the pending | |
| 1998 * error/interrupt/exception state. | |
| 1999 */ | |
| 2000 | |
| 2001 /* | |
| 2002 * This function works a bit like ex_finally() except that there was not | |
| 2003 * actually an extra try block around the part that failed and an error or | |
| 2004 * interrupt has not (yet) been converted to an exception. This function | |
| 2005 * saves the error/interrupt/ exception state and prepares for the call to | |
| 2006 * do_cmdline() that is going to be made for the cleanup autocommand | |
| 2007 * execution. | |
| 24 | 2008 */ |
| 2009 void | |
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2010 enter_cleanup(cleanup_T *csp) |
| 24 | 2011 { |
| 2012 int pending = CSTP_NONE; | |
| 2013 | |
| 2014 /* | |
| 2015 * Postpone did_emsg, got_int, did_throw. The pending values will be | |
| 2016 * restored by leave_cleanup() except if there was an aborting error, | |
| 2017 * interrupt, or uncaught exception after this function ends. | |
| 2018 */ | |
| 2019 if (did_emsg || got_int || did_throw || need_rethrow) | |
| 2020 { | |
| 2021 csp->pending = (did_emsg ? CSTP_ERROR : 0) | |
| 2022 | (got_int ? CSTP_INTERRUPT : 0) | |
| 2023 | (did_throw ? CSTP_THROW : 0) | |
| 2024 | (need_rethrow ? CSTP_THROW : 0); | |
| 2025 | |
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2026 // If we are currently throwing an exception (did_throw), save it as |
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2027 // well. On an error not yet converted to an exception, update |
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2028 // "force_abort" and reset "cause_abort" (as do_errthrow() would do). |
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2029 // This is needed for the do_cmdline() call that is going to be made |
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2030 // for autocommand execution. We need not save *msg_list because |
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2031 // there is an extra instance for every call of do_cmdline(), anyway. |
| 24 | 2032 if (did_throw || need_rethrow) |
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2033 { |
| 24 | 2034 csp->exception = current_exception; |
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2035 current_exception = NULL; |
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2036 } |
| 24 | 2037 else |
| 2038 { | |
| 2039 csp->exception = NULL; | |
| 2040 if (did_emsg) | |
| 2041 { | |
| 2042 force_abort |= cause_abort; | |
| 2043 cause_abort = FALSE; | |
| 2044 } | |
| 2045 } | |
| 2046 did_emsg = got_int = did_throw = need_rethrow = FALSE; | |
| 2047 | |
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2048 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2049 report_make_pending(pending, csp->exception); |
| 2050 } | |
| 2051 else | |
| 2052 { | |
| 2053 csp->pending = CSTP_NONE; | |
| 2054 csp->exception = NULL; | |
| 2055 } | |
| 2056 } | |
| 2057 | |
| 2058 /* | |
| 36 | 2059 * See comment above enter_cleanup() for how this function is used. |
| 2060 * | |
| 2061 * This function is a bit like ex_endtry() except that there was not actually | |
| 2062 * an extra try block around the part that failed and an error or interrupt | |
| 2063 * had not (yet) been converted to an exception when the cleanup autocommand | |
| 2064 * sequence was invoked. | |
| 2065 * | |
| 2066 * This function has to be called with the address of the cleanup_T structure | |
| 2067 * filled by enter_cleanup() as an argument; it restores the error/interrupt/ | |
| 2068 * exception state saved by that function - except there was an aborting | |
| 2069 * error, an interrupt or an uncaught exception during execution of the | |
| 2070 * cleanup autocommands. In the latter case, the saved error/interrupt/ | |
| 2071 * exception state is discarded. | |
| 24 | 2072 */ |
| 2073 void | |
|
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2074 leave_cleanup(cleanup_T *csp) |
| 24 | 2075 { |
| 2076 int pending = csp->pending; | |
| 2077 | |
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2078 if (pending == CSTP_NONE) // nothing to do |
| 24 | 2079 return; |
| 2080 | |
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2081 // If there was an aborting error, an interrupt, or an uncaught exception |
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2082 // after the corresponding call to enter_cleanup(), discard what has been |
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2083 // made pending by it. Report this to the user if required by the |
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2084 // 'verbose' option or when debugging. |
| 24 | 2085 if (aborting() || need_rethrow) |
| 2086 { | |
| 2087 if (pending & CSTP_THROW) | |
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2088 // Cancel the pending exception (includes report). |
| 24 | 2089 discard_exception((except_T *)csp->exception, FALSE); |
| 2090 else | |
| 2091 report_discard_pending(pending, NULL); | |
| 2092 | |
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2093 // If an error was about to be converted to an exception when |
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2094 // enter_cleanup() was called, free the message list. |
| 1046 | 2095 if (msg_list != NULL) |
| 5517 | 2096 free_global_msglist(); |
| 24 | 2097 } |
| 2098 | |
| 2099 /* | |
| 2100 * If there was no new error, interrupt, or throw between the calls | |
| 2101 * to enter_cleanup() and leave_cleanup(), restore the pending | |
| 2102 * error/interrupt/exception state. | |
| 2103 */ | |
| 2104 else | |
| 2105 { | |
| 2106 /* | |
| 2107 * If there was an exception being thrown when enter_cleanup() was | |
| 2108 * called, we need to rethrow it. Make it the exception currently | |
| 2109 * being thrown. | |
| 2110 */ | |
| 2111 if (pending & CSTP_THROW) | |
| 2112 current_exception = csp->exception; | |
| 2113 | |
| 2114 /* | |
| 2115 * If an error was about to be converted to an exception when | |
| 2116 * enter_cleanup() was called, let "cause_abort" take the part of | |
| 2117 * "force_abort" (as done by cause_errthrow()). | |
| 2118 */ | |
| 2119 else if (pending & CSTP_ERROR) | |
| 2120 { | |
| 2121 cause_abort = force_abort; | |
| 2122 force_abort = FALSE; | |
| 2123 } | |
| 2124 | |
| 2125 /* | |
| 2126 * Restore the pending values of did_emsg, got_int, and did_throw. | |
| 2127 */ | |
| 2128 if (pending & CSTP_ERROR) | |
| 2129 did_emsg = TRUE; | |
| 2130 if (pending & CSTP_INTERRUPT) | |
| 2131 got_int = TRUE; | |
| 2132 if (pending & CSTP_THROW) | |
|
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2133 need_rethrow = TRUE; // did_throw will be set by do_one_cmd() |
| 24 | 2134 |
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2135 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2136 report_resume_pending(pending, |
| 36 | 2137 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 24 | 2138 } |
| 2139 } | |
| 2140 | |
| 2141 | |
| 2142 /* | |
| 7 | 2143 * Make conditionals inactive and discard what's pending in finally clauses |
| 2144 * until the conditional type searched for or a try conditional not in its | |
| 79 | 2145 * finally clause is reached. If this is in an active catch clause, finish |
| 2146 * the caught exception. | |
| 2147 * Return the cstack index where the search stopped. | |
| 75 | 2148 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0, |
| 2149 * the latter meaning the innermost try conditional not in its finally clause. | |
| 2150 * "inclusive" tells whether the conditional searched for should be made | |
| 4352 | 2151 * inactive itself (a try conditional not in its finally clause possibly find |
| 75 | 2152 * before is always made inactive). If "inclusive" is TRUE and |
| 2153 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of | |
| 2154 * "emsg_silent", if reset when the try conditional finally reached was | |
| 4352 | 2155 * entered, is restored (used by ex_endtry()). This is normally done only |
| 75 | 2156 * when such a try conditional is left. |
| 7 | 2157 */ |
| 2158 int | |
|
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2159 cleanup_conditionals( |
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2160 cstack_T *cstack, |
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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2161 int searched_cond, |
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f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
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2162 int inclusive) |
| 7 | 2163 { |
| 2164 int idx; | |
| 2165 int stop = FALSE; | |
| 2166 | |
| 2167 for (idx = cstack->cs_idx; idx >= 0; --idx) | |
| 2168 { | |
| 2169 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 2170 { | |
| 2171 /* | |
| 2172 * Discard anything pending in a finally clause and continue the | |
| 2173 * search. There may also be a pending ":continue", ":break", | |
| 2174 * ":return", or ":finish" before the finally clause. We must not | |
| 2175 * discard it, unless an error or interrupt occurred afterwards. | |
| 2176 */ | |
| 359 | 2177 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) |
| 7 | 2178 { |
| 2179 switch (cstack->cs_pending[idx]) | |
| 2180 { | |
| 2181 case CSTP_NONE: | |
| 2182 break; | |
| 2183 | |
| 2184 case CSTP_CONTINUE: | |
| 2185 case CSTP_BREAK: | |
| 2186 case CSTP_FINISH: | |
| 2187 report_discard_pending(cstack->cs_pending[idx], NULL); | |
| 2188 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2189 break; | |
| 2190 | |
| 2191 case CSTP_RETURN: | |
| 2192 report_discard_pending(CSTP_RETURN, | |
| 68 | 2193 cstack->cs_rettv[idx]); |
| 2194 discard_pending_return(cstack->cs_rettv[idx]); | |
| 7 | 2195 cstack->cs_pending[idx] = CSTP_NONE; |
| 2196 break; | |
| 2197 | |
| 2198 default: | |
| 2199 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 2200 { | |
| 2201 if (cstack->cs_pending[idx] & CSTP_THROW) | |
| 2202 { | |
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2203 // Cancel the pending exception. This is in the |
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2204 // finally clause, so that the stack of the |
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2205 // caught exceptions is not involved. |
| 7 | 2206 discard_exception((except_T *) |
| 2207 cstack->cs_exception[idx], | |
| 2208 FALSE); | |
| 2209 } | |
| 2210 else | |
| 2211 report_discard_pending(cstack->cs_pending[idx], | |
| 2212 NULL); | |
| 2213 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2214 } | |
| 2215 break; | |
| 2216 } | |
| 2217 } | |
| 2218 | |
| 2219 /* | |
| 2220 * Stop at a try conditional not in its finally clause. If this try | |
| 2221 * conditional is in an active catch clause, finish the caught | |
| 2222 * exception. | |
| 2223 */ | |
| 2224 if (!(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 2225 { | |
| 2226 if ((cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 2227 && (cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 2228 finish_exception((except_T *)cstack->cs_exception[idx]); | |
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2229 // Stop at this try conditional - except the try block never |
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2230 // got active (because of an inactive surrounding conditional |
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2231 // or when the ":try" appeared after an error or interrupt or |
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2232 // throw). |
| 7 | 2233 if (cstack->cs_flags[idx] & CSF_TRUE) |
| 2234 { | |
| 2235 if (searched_cond == 0 && !inclusive) | |
| 2236 break; | |
| 2237 stop = TRUE; | |
| 2238 } | |
| 2239 } | |
| 2240 } | |
| 2241 | |
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2242 // Stop on the searched conditional type (even when the surrounding |
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2243 // conditional is not active or something has been made pending). |
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2244 // If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT, |
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2245 // check first whether "emsg_silent" needs to be restored. |
| 7 | 2246 if (cstack->cs_flags[idx] & searched_cond) |
| 2247 { | |
| 2248 if (!inclusive) | |
| 2249 break; | |
| 2250 stop = TRUE; | |
| 2251 } | |
| 2252 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 2253 if (stop && searched_cond != (CSF_TRY | CSF_SILENT)) | |
| 2254 break; | |
| 2255 | |
| 2256 /* | |
| 1214 | 2257 * When leaving a try conditional that reset "emsg_silent" on its |
| 2258 * entry after saving the original value, restore that value here and | |
| 2259 * free the memory used to store it. | |
| 7 | 2260 */ |
| 2261 if ((cstack->cs_flags[idx] & CSF_TRY) | |
| 359 | 2262 && (cstack->cs_flags[idx] & CSF_SILENT)) |
| 7 | 2263 { |
| 2264 eslist_T *elem; | |
| 2265 | |
| 2266 elem = cstack->cs_emsg_silent_list; | |
| 2267 cstack->cs_emsg_silent_list = elem->next; | |
| 2268 emsg_silent = elem->saved_emsg_silent; | |
| 2269 vim_free(elem); | |
| 2270 cstack->cs_flags[idx] &= ~CSF_SILENT; | |
| 2271 } | |
| 2272 if (stop) | |
| 2273 break; | |
| 2274 } | |
| 2275 return idx; | |
| 2276 } | |
| 2277 | |
| 2278 /* | |
| 75 | 2279 * Return an appropriate error message for a missing endwhile/endfor/endif. |
| 2280 */ | |
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2281 static char * |
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2282 get_end_emsg(cstack_T *cstack) |
| 75 | 2283 { |
| 2284 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE) | |
| 2285 return e_endwhile; | |
| 2286 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) | |
| 2287 return e_endfor; | |
| 2288 return e_endif; | |
| 2289 } | |
| 2290 | |
| 2291 | |
| 2292 /* | |
| 7 | 2293 * Rewind conditionals until index "idx" is reached. "cond_type" and |
| 2294 * "cond_level" specify a conditional type and the address of a level variable | |
| 2295 * which is to be decremented with each skipped conditional of the specified | |
| 2296 * type. | |
| 79 | 2297 * Also free "for info" structures where needed. |
| 7 | 2298 */ |
| 79 | 2299 void |
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2300 rewind_conditionals( |
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2301 cstack_T *cstack, |
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
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diff
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2302 int idx, |
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f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
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2303 int cond_type, |
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f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
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2304 int *cond_level) |
| 7 | 2305 { |
| 2306 while (cstack->cs_idx > idx) | |
| 2307 { | |
| 2308 if (cstack->cs_flags[cstack->cs_idx] & cond_type) | |
| 2309 --*cond_level; | |
| 79 | 2310 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
| 2311 free_for_info(cstack->cs_forinfo[cstack->cs_idx]); | |
| 7 | 2312 --cstack->cs_idx; |
| 2313 } | |
| 2314 } | |
| 2315 | |
| 2316 /* | |
| 2317 * ":endfunction" when not after a ":function" | |
| 2318 */ | |
| 2319 void | |
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2320 ex_endfunction(exarg_T *eap) |
| 7 | 2321 { |
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2322 if (eap->cmdidx == CMD_enddef) |
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2323 emsg(_("E193: :enddef not inside a function")); |
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2324 else |
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2325 emsg(_("E193: :endfunction not inside a function")); |
| 7 | 2326 } |
| 2327 | |
| 2328 /* | |
| 75 | 2329 * Return TRUE if the string "p" looks like a ":while" or ":for" command. |
| 7 | 2330 */ |
| 2331 int | |
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2332 has_loop_cmd(char_u *p) |
| 7 | 2333 { |
| 1447 | 2334 int len; |
| 2335 | |
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2336 // skip modifiers, white space and ':' |
| 1447 | 2337 for (;;) |
| 2338 { | |
| 2339 while (*p == ' ' || *p == '\t' || *p == ':') | |
| 2340 ++p; | |
| 2341 len = modifier_len(p); | |
| 2342 if (len == 0) | |
| 2343 break; | |
| 2344 p += len; | |
| 2345 } | |
| 75 | 2346 if ((p[0] == 'w' && p[1] == 'h') |
| 2347 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r')) | |
| 7 | 2348 return TRUE; |
| 2349 return FALSE; | |
| 2350 } | |
| 2351 | |
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2352 #endif // FEAT_EVAL |