Mercurial > vim
annotate src/ex_eval.c @ 23752:7425d3e5804e v8.2.2417
patch 8.2.2417: condition stack values may be used when not set
Commit: https://github.com/vim/vim/commit/3e492c2d5fbd4ae395ffddfc059a3c414604b951
Author: Bram Moolenaar <Bram@vim.org>
Date: Wed Jan 27 21:37:13 2021 +0100
patch 8.2.2417: condition stack values may be used when not set
Problem: Condition stack values may be used when not set.
Solution: Clear cs_script_var_len and cs_block_id just in case they get used
later. (issue #7733)
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Wed, 27 Jan 2021 21:45:03 +0100 |
| parents | f8382c4e6551 |
| children | 29b15fbc2bcb |
| 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(ESTACK_NONE); |
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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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|
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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changeset
|
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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changeset
|
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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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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|
427 int *should_free) |
| 7 | 428 { |
|
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|
429 char *ret; |
|
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|
430 char *mesg; |
| 7 | 431 int cmdlen; |
|
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|
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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diff
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
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patch 8.2.0967: unnecessary type casts for vim_strnsave()
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changeset
|
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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changeset
|
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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diff
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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patch 8.1.2379: using old C style comments
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changeset
|
533 // Store the original message and prefix the exception value with |
|
8f05b3cf8557
patch 8.1.2379: using old C style comments
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changeset
|
534 // "Vim:" or, if a command name is given, "Vim(cmdname):". |
|
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patch 8.2.0823: Vim9: script reload test is disabled
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diff
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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patch 8.2.0823: Vim9: script reload test is disabled
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diff
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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diff
changeset
|
543 { |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
544 msglist_T *entry = (msglist_T *)value; |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
545 |
|
9f921ba86d05
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; |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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diff
changeset
|
548 excp->throw_lnum = entry->slnum; |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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changeset
|
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 { |
|
22208
a607f02fd17a
patch 8.2.1653: expand('<stack>') does not include the final line number
Bram Moolenaar <Bram@vim.org>
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21493
diff
changeset
|
552 excp->throw_name = estack_sfile(ESTACK_NONE); |
|
20538
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
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parents:
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diff
changeset
|
553 if (excp->throw_name == NULL) |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
Bram Moolenaar <Bram@vim.org>
parents:
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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
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parents:
20397
diff
changeset
|
555 if (excp->throw_name == NULL) |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
556 { |
|
9f921ba86d05
patch 8.2.0823: Vim9: script reload test is disabled
Bram Moolenaar <Bram@vim.org>
parents:
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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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diff
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) |
|
18779
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patch 8.1.2379: using old C style comments
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diff
changeset
|
574 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 575 |
|
15470
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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); |
|
18779
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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; | |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
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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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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
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7801
diff
changeset
|
605 discard_exception(except_T *excp, int was_finished) |
| 7 | 606 { |
| 607 char_u *saved_IObuff; | |
| 608 | |
|
23235
22037d6da577
patch 8.2.2163: crash when discarded exception is the current exception
Bram Moolenaar <Bram@vim.org>
parents:
22643
diff
changeset
|
609 if (current_exception == excp) |
|
22037d6da577
patch 8.2.2163: crash when discarded exception is the current exception
Bram Moolenaar <Bram@vim.org>
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22643
diff
changeset
|
610 current_exception = NULL; |
| 7 | 611 if (excp == NULL) |
| 612 { | |
|
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commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
613 internal_error("discard_exception()"); |
| 7 | 614 return; |
| 615 } | |
| 616 | |
| 617 if (p_verbose >= 13 || debug_break_level > 0) | |
| 618 { | |
| 619 int save_msg_silent = msg_silent; | |
| 620 | |
| 621 saved_IObuff = vim_strsave(IObuff); | |
| 622 if (debug_break_level > 0) | |
|
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changeset
|
623 msg_silent = FALSE; // display messages |
| 293 | 624 else |
| 625 verbose_enter(); | |
| 7 | 626 ++no_wait_return; |
| 293 | 627 if (debug_break_level > 0 || *p_vfile == NUL) |
|
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changeset
|
628 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 273 | 629 smsg(was_finished |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
630 ? _("Exception finished: %s") |
|
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
631 : _("Exception discarded: %s"), |
| 7 | 632 excp->value); |
|
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changeset
|
633 msg_puts("\n"); // don't overwrite this either |
| 293 | 634 if (debug_break_level > 0 || *p_vfile == NUL) |
| 635 cmdline_row = msg_row; | |
| 7 | 636 --no_wait_return; |
| 637 if (debug_break_level > 0) | |
| 638 msg_silent = save_msg_silent; | |
| 293 | 639 else |
| 640 verbose_leave(); | |
| 7 | 641 STRCPY(IObuff, saved_IObuff); |
| 642 vim_free(saved_IObuff); | |
| 643 } | |
| 644 if (excp->type != ET_INTERRUPT) | |
| 645 vim_free(excp->value); | |
| 646 if (excp->type == ET_ERROR) | |
| 647 free_msglist(excp->messages); | |
| 648 vim_free(excp->throw_name); | |
| 649 vim_free(excp); | |
| 650 } | |
| 651 | |
| 652 /* | |
| 653 * Discard the exception currently being thrown. | |
| 654 */ | |
| 655 void | |
|
7819
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Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
656 discard_current_exception(void) |
| 7 | 657 { |
|
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
|
658 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:
10361
diff
changeset
|
659 discard_exception(current_exception, FALSE); |
| 7 | 660 did_throw = FALSE; |
| 661 need_rethrow = FALSE; | |
| 662 } | |
| 663 | |
| 664 /* | |
| 665 * Put an exception on the caught stack. | |
| 666 */ | |
|
19181
94eda51ba9ba
patch 8.2.0149: maintaining a Vim9 branch separately is more work
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
667 void |
|
7819
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
668 catch_exception(except_T *excp) |
| 7 | 669 { |
| 670 excp->caught = caught_stack; | |
| 671 caught_stack = excp; | |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
672 set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1); |
| 7 | 673 if (*excp->throw_name != NUL) |
| 674 { | |
| 675 if (excp->throw_lnum != 0) | |
| 273 | 676 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"), |
| 677 excp->throw_name, (long)excp->throw_lnum); | |
| 7 | 678 else |
| 273 | 679 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name); |
| 7 | 680 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 681 } | |
| 682 else | |
|
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patch 8.1.2379: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
683 // throw_name not set on an exception from a command that was typed. |
| 7 | 684 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 685 | |
| 686 if (p_verbose >= 13 || debug_break_level > 0) | |
| 687 { | |
| 688 int save_msg_silent = msg_silent; | |
| 689 | |
| 690 if (debug_break_level > 0) | |
|
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parents:
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diff
changeset
|
691 msg_silent = FALSE; // display messages |
| 293 | 692 else |
| 693 verbose_enter(); | |
| 7 | 694 ++no_wait_return; |
| 293 | 695 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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parents:
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diff
changeset
|
696 msg_scroll = TRUE; // always scroll up, don't overwrite |
| 293 | 697 |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
698 smsg(_("Exception caught: %s"), excp->value); |
|
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patch 8.1.2379: using old C style comments
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parents:
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diff
changeset
|
699 msg_puts("\n"); // don't overwrite this either |
| 293 | 700 |
| 701 if (debug_break_level > 0 || *p_vfile == NUL) | |
| 702 cmdline_row = msg_row; | |
| 7 | 703 --no_wait_return; |
| 704 if (debug_break_level > 0) | |
| 705 msg_silent = save_msg_silent; | |
| 293 | 706 else |
| 707 verbose_leave(); | |
| 7 | 708 } |
| 709 } | |
| 710 | |
| 711 /* | |
| 712 * Remove an exception from the caught stack. | |
| 713 */ | |
| 714 static void | |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
715 finish_exception(except_T *excp) |
| 7 | 716 { |
| 717 if (excp != caught_stack) | |
|
10359
66f1b5bf3fa6
commit https://github.com/vim/vim/commit/95f096030ed1a8afea028f2ea295d6f6a70f466f
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
718 internal_error("finish_exception()"); |
| 7 | 719 caught_stack = caught_stack->caught; |
| 720 if (caught_stack != NULL) | |
| 721 { | |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
722 set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1); |
| 7 | 723 if (*caught_stack->throw_name != NUL) |
| 724 { | |
| 725 if (caught_stack->throw_lnum != 0) | |
| 273 | 726 vim_snprintf((char *)IObuff, IOSIZE, |
| 7 | 727 _("%s, line %ld"), caught_stack->throw_name, |
| 728 (long)caught_stack->throw_lnum); | |
| 729 else | |
| 273 | 730 vim_snprintf((char *)IObuff, IOSIZE, "%s", |
| 731 caught_stack->throw_name); | |
| 7 | 732 set_vim_var_string(VV_THROWPOINT, IObuff, -1); |
| 733 } | |
| 734 else | |
|
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changeset
|
735 // throw_name not set on an exception from a command that was |
|
8f05b3cf8557
patch 8.1.2379: using old C style comments
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parents:
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diff
changeset
|
736 // typed. |
| 7 | 737 set_vim_var_string(VV_THROWPOINT, NULL, -1); |
| 738 } | |
| 739 else | |
| 740 { | |
| 741 set_vim_var_string(VV_EXCEPTION, NULL, -1); | |
| 742 set_vim_var_string(VV_THROWPOINT, NULL, -1); | |
| 743 } | |
| 744 | |
|
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patch 8.1.2379: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
745 // Discard the exception, but use the finish message for 'verbose'. |
| 7 | 746 discard_exception(excp, TRUE); |
| 747 } | |
| 748 | |
| 749 /* | |
| 750 * Flags specifying the message displayed by report_pending. | |
| 751 */ | |
| 752 #define RP_MAKE 0 | |
| 753 #define RP_RESUME 1 | |
| 754 #define RP_DISCARD 2 | |
| 755 | |
| 756 /* | |
| 757 * Report information about something pending in a finally clause if required by | |
| 758 * the 'verbose' option or when debugging. "action" tells whether something is | |
| 759 * made pending or something pending is resumed or discarded. "pending" tells | |
| 760 * what is pending. "value" specifies the return value for a pending ":return" | |
| 761 * or the exception value for a pending exception. | |
| 762 */ | |
| 763 static void | |
|
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
764 report_pending(int action, int pending, void *value) |
| 7 | 765 { |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
14862
diff
changeset
|
766 char *mesg; |
| 7 | 767 char *s; |
| 768 int save_msg_silent; | |
| 769 | |
| 770 | |
| 771 switch (action) | |
| 772 { | |
| 773 case RP_MAKE: | |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
774 mesg = _("%s made pending"); |
| 7 | 775 break; |
| 776 case RP_RESUME: | |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
777 mesg = _("%s resumed"); |
| 7 | 778 break; |
|
18779
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patch 8.1.2379: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18699
diff
changeset
|
779 // case RP_DISCARD: |
| 7 | 780 default: |
|
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
781 mesg = _("%s discarded"); |
| 7 | 782 break; |
| 783 } | |
| 784 | |
| 785 switch (pending) | |
| 786 { | |
| 787 case CSTP_NONE: | |
| 788 return; | |
| 789 | |
| 790 case CSTP_CONTINUE: | |
| 791 s = ":continue"; | |
| 792 break; | |
| 793 case CSTP_BREAK: | |
| 794 s = ":break"; | |
| 795 break; | |
| 796 case CSTP_FINISH: | |
| 797 s = ":finish"; | |
| 798 break; | |
| 799 case CSTP_RETURN: | |
|
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parents:
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diff
changeset
|
800 // ":return" command producing value, allocated |
| 7 | 801 s = (char *)get_return_cmd(value); |
| 802 break; | |
| 803 | |
| 804 default: | |
| 805 if (pending & CSTP_THROW) | |
| 806 { | |
|
15470
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Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
807 vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception")); |
|
20830
9064044fd4f6
patch 8.2.0967: unnecessary type casts for vim_strnsave()
Bram Moolenaar <Bram@vim.org>
parents:
20538
diff
changeset
|
808 mesg = (char *)vim_strnsave(IObuff, STRLEN(IObuff) + 4); |
| 7 | 809 STRCAT(mesg, ": %s"); |
| 810 s = (char *)((except_T *)value)->value; | |
| 811 } | |
| 812 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT)) | |
| 813 s = _("Error and interrupt"); | |
| 814 else if (pending & CSTP_ERROR) | |
| 815 s = _("Error"); | |
|
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parents:
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changeset
|
816 else // if (pending & CSTP_INTERRUPT) |
| 7 | 817 s = _("Interrupt"); |
| 818 } | |
| 819 | |
| 820 save_msg_silent = msg_silent; | |
| 821 if (debug_break_level > 0) | |
|
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parents:
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changeset
|
822 msg_silent = FALSE; // display messages |
| 7 | 823 ++no_wait_return; |
|
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parents:
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changeset
|
824 msg_scroll = TRUE; // always scroll up, don't overwrite |
|
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
825 smsg(mesg, s); |
|
18779
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patch 8.1.2379: using old C style comments
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parents:
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diff
changeset
|
826 msg_puts("\n"); // don't overwrite this either |
| 7 | 827 cmdline_row = msg_row; |
| 828 --no_wait_return; | |
| 829 if (debug_break_level > 0) | |
| 830 msg_silent = save_msg_silent; | |
| 831 | |
| 832 if (pending == CSTP_RETURN) | |
| 833 vim_free(s); | |
| 834 else if (pending & CSTP_THROW) | |
| 835 vim_free(mesg); | |
| 836 } | |
| 837 | |
| 838 /* | |
| 839 * If something is made pending in a finally clause, report it if required by | |
| 840 * the 'verbose' option or when debugging. | |
| 841 */ | |
| 842 void | |
|
7819
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
843 report_make_pending(int pending, void *value) |
| 7 | 844 { |
| 845 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 846 { |
| 847 if (debug_break_level <= 0) | |
| 848 verbose_enter(); | |
| 7 | 849 report_pending(RP_MAKE, pending, value); |
| 293 | 850 if (debug_break_level <= 0) |
| 851 verbose_leave(); | |
| 852 } | |
| 7 | 853 } |
| 854 | |
| 855 /* | |
| 856 * If something pending in a finally clause is resumed at the ":endtry", report | |
| 857 * it if required by the 'verbose' option or when debugging. | |
| 858 */ | |
|
17789
0f7ae8010787
patch 8.1.1891: functions used in one file are global
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
859 static void |
|
7819
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
860 report_resume_pending(int pending, void *value) |
| 7 | 861 { |
| 862 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 863 { |
| 864 if (debug_break_level <= 0) | |
| 865 verbose_enter(); | |
| 7 | 866 report_pending(RP_RESUME, pending, value); |
| 293 | 867 if (debug_break_level <= 0) |
| 868 verbose_leave(); | |
| 869 } | |
| 7 | 870 } |
| 871 | |
| 872 /* | |
| 873 * If something pending in a finally clause is discarded, report it if required | |
| 874 * by the 'verbose' option or when debugging. | |
| 875 */ | |
|
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patch 8.1.1891: functions used in one file are global
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
876 static void |
|
7819
f86adafb28d4
commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
7801
diff
changeset
|
877 report_discard_pending(int pending, void *value) |
| 7 | 878 { |
| 879 if (p_verbose >= 14 || debug_break_level > 0) | |
| 293 | 880 { |
| 881 if (debug_break_level <= 0) | |
| 882 verbose_enter(); | |
| 7 | 883 report_pending(RP_DISCARD, pending, value); |
| 293 | 884 if (debug_break_level <= 0) |
| 885 verbose_leave(); | |
| 886 } | |
| 7 | 887 } |
| 888 | |
| 889 | |
| 890 /* | |
|
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patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
891 * ":eval". |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
892 */ |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
893 void |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
894 ex_eval(exarg_T *eap) |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
895 { |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
896 typval_T tv; |
|
20992
7ee565134d4a
patch 8.2.1047: Vim9: script cannot use line continuation like :def function
Bram Moolenaar <Bram@vim.org>
parents:
20830
diff
changeset
|
897 evalarg_T evalarg; |
|
17620
072efa9ca875
patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
898 |
|
21118
b0baa80cb53f
patch 8.2.1110: Vim9: line continuation does not work in function arguments
Bram Moolenaar <Bram@vim.org>
parents:
21058
diff
changeset
|
899 fill_evalarg_from_eap(&evalarg, eap, eap->skip); |
|
20992
7ee565134d4a
patch 8.2.1047: Vim9: script cannot use line continuation like :def function
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
900 |
|
20996
3af71cbcfdbe
patch 8.2.1049: Vim9: leaking memory when using continuation line
Bram Moolenaar <Bram@vim.org>
parents:
20992
diff
changeset
|
901 if (eval0(eap->arg, &tv, eap, &evalarg) == OK) |
|
17620
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patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
902 clear_tv(&tv); |
|
21058
111f877e63d9
patch 8.2.1080: Vim9: no line break allowed in a for loop
Bram Moolenaar <Bram@vim.org>
parents:
21040
diff
changeset
|
903 |
|
111f877e63d9
patch 8.2.1080: Vim9: no line break allowed in a for loop
Bram Moolenaar <Bram@vim.org>
parents:
21040
diff
changeset
|
904 clear_evalarg(&evalarg, eap); |
|
17620
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patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
905 } |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
906 |
|
072efa9ca875
patch 8.1.1807: more functions can be used as a method
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parents:
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diff
changeset
|
907 /* |
|
22551
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
908 * Start a new scope/block. Caller should have checked that cs_idx is not |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
909 * exceeding CSTACK_LEN. |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
910 */ |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
911 static void |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
912 enter_block(cstack_T *cstack) |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
913 { |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
914 ++cstack->cs_idx; |
|
86a115a80262
patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
22208
diff
changeset
|
915 if (in_vim9script()) |
|
22594
209c7aa56325
patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
parents:
22555
diff
changeset
|
916 { |
|
209c7aa56325
patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
parents:
22555
diff
changeset
|
917 scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid); |
|
209c7aa56325
patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
918 |
|
209c7aa56325
patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
parents:
22555
diff
changeset
|
919 cstack->cs_script_var_len[cstack->cs_idx] = si->sn_var_vals.ga_len; |
|
22596
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
parents:
22594
diff
changeset
|
920 cstack->cs_block_id[cstack->cs_idx] = ++si->sn_last_block_id; |
|
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
921 si->sn_current_block_id = si->sn_last_block_id; |
|
22594
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patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
922 } |
|
23752
7425d3e5804e
patch 8.2.2417: condition stack values may be used when not set
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
923 else |
|
7425d3e5804e
patch 8.2.2417: condition stack values may be used when not set
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
924 { |
|
7425d3e5804e
patch 8.2.2417: condition stack values may be used when not set
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
925 // Just in case in_vim9script() does not return the same value when the |
|
7425d3e5804e
patch 8.2.2417: condition stack values may be used when not set
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
926 // block ends. |
|
7425d3e5804e
patch 8.2.2417: condition stack values may be used when not set
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diff
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|
927 cstack->cs_script_var_len[cstack->cs_idx] = 0; |
|
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patch 8.2.2417: condition stack values may be used when not set
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changeset
|
928 cstack->cs_block_id[cstack->cs_idx] = 0; |
|
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patch 8.2.2417: condition stack values may be used when not set
Bram Moolenaar <Bram@vim.org>
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diff
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|
929 } |
|
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patch 8.2.1824: Vim9: variables at the script level escape their scope
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|
930 } |
|
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changeset
|
931 |
|
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changeset
|
932 static void |
|
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diff
changeset
|
933 leave_block(cstack_T *cstack) |
|
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changeset
|
934 { |
|
22594
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diff
changeset
|
935 if (in_vim9script() && SCRIPT_ID_VALID(current_sctx.sc_sid)) |
|
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patch 8.2.1824: Vim9: variables at the script level escape their scope
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changeset
|
936 { |
|
22553
3ed3bed38e0f
patch 8.2.1825: Vim9: accessing freed memory
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
937 scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid); |
|
22594
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patch 8.2.1845: Vim9: function defined in a block can't use block variables
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
938 int i; |
|
22643
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
939 int func_defined = |
|
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
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changeset
|
940 cstack->cs_flags[cstack->cs_idx] & CSF_FUNC_DEF; |
|
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|
941 |
|
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changeset
|
942 for (i = cstack->cs_script_var_len[cstack->cs_idx]; |
|
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changeset
|
943 i < si->sn_var_vals.ga_len; ++i) |
|
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parents:
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|
944 { |
|
22594
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diff
changeset
|
945 svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + i; |
|
22553
3ed3bed38e0f
patch 8.2.1825: Vim9: accessing freed memory
Bram Moolenaar <Bram@vim.org>
parents:
22551
diff
changeset
|
946 |
|
22643
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
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changeset
|
947 // sv_name is set to NULL if it was already removed. This happens |
|
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
parents:
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changeset
|
948 // when it was defined in an inner block and no functions were |
|
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
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|
949 // defined there. |
|
22594
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changeset
|
950 if (sv->sv_name != NULL) |
|
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Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
951 // Remove a variable declared inside the block, if it still |
|
22643
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
952 // exists, from sn_vars and move the value into sn_all_vars |
|
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
953 // if "func_defined" is non-zero. |
|
71b57779177d
patch 8.2.1870: Vim9: no need to keep all script variables
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
954 hide_script_var(si, i, func_defined); |
|
22551
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patch 8.2.1824: Vim9: variables at the script level escape their scope
Bram Moolenaar <Bram@vim.org>
parents:
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changeset
|
955 } |
|
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parents:
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diff
changeset
|
956 |
|
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patch 8.2.1845: Vim9: function defined in a block can't use block variables
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changeset
|
957 // TODO: is this needed? |
|
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Bram Moolenaar <Bram@vim.org>
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changeset
|
958 cstack->cs_script_var_len[cstack->cs_idx] = si->sn_var_vals.ga_len; |
|
22596
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
parents:
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changeset
|
959 |
|
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
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changeset
|
960 if (cstack->cs_idx == 0) |
|
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
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changeset
|
961 si->sn_current_block_id = 0; |
|
107eae953b87
patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
962 else |
|
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patch 8.2.1846: Vim9: block variables are not found in compiled function
Bram Moolenaar <Bram@vim.org>
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changeset
|
963 si->sn_current_block_id = cstack->cs_block_id[cstack->cs_idx - 1]; |
|
22551
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|
964 } |
|
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changeset
|
965 --cstack->cs_idx; |
|
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|
966 } |
|
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|
967 |
|
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changeset
|
968 /* |
| 7 | 969 * ":if". |
| 970 */ | |
| 971 void | |
|
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f86adafb28d4
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
972 ex_if(exarg_T *eap) |
| 7 | 973 { |
| 974 int error; | |
| 975 int skip; | |
| 976 int result; | |
|
18904
2bdc2e1f6e1f
patch 8.2.0013: not using a typedef for condstack
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parents:
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diff
changeset
|
977 cstack_T *cstack = eap->cstack; |
| 7 | 978 |
| 979 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
21459
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patch 8.2.1280: Ex command error cannot contain an argument
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|
980 eap->errmsg = _("E579: :if nesting too deep"); |
| 7 | 981 else |
| 982 { | |
|
22551
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changeset
|
983 enter_block(cstack); |
| 7 | 984 cstack->cs_flags[cstack->cs_idx] = 0; |
| 985 | |
| 986 /* | |
|
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diff
changeset
|
987 * Don't do something after an error, interrupt, or throw, or when |
|
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diff
changeset
|
988 * there is a surrounding conditional and it was not active. |
| 7 | 989 */ |
| 990 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 991 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 992 | |
|
20996
3af71cbcfdbe
patch 8.2.1049: Vim9: leaking memory when using continuation line
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diff
changeset
|
993 result = eval_to_bool(eap->arg, &error, eap, skip); |
| 7 | 994 |
| 995 if (!skip && !error) | |
| 996 { | |
| 997 if (result) | |
| 998 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 999 } | |
| 1000 else | |
|
18779
8f05b3cf8557
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Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
1001 // set TRUE, so this conditional will never get active |
| 7 | 1002 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 1003 } | |
| 1004 } | |
| 1005 | |
| 1006 /* | |
| 1007 * ":endif". | |
| 1008 */ | |
| 1009 void | |
|
7819
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commit https://github.com/vim/vim/commit/78c0b7d43e5048fd71d12816659667834170c76d
Christian Brabandt <cb@256bit.org>
parents:
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changeset
|
1010 ex_endif(exarg_T *eap) |
| 7 | 1011 { |
|
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|
1012 cstack_T *cstack = eap->cstack; |
|
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|
1013 |
| 7 | 1014 did_endif = TRUE; |
|
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|
1015 if (cstack->cs_idx < 0 |
|
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|
1016 || (cstack->cs_flags[cstack->cs_idx] |
|
22555
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Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
1017 & (CSF_WHILE | CSF_FOR | CSF_TRY | CSF_BLOCK))) |
|
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|
1018 eap->errmsg = _(e_endif_without_if); |
| 7 | 1019 else |
| 1020 { | |
| 1021 /* | |
| 1022 * When debugging or a breakpoint was encountered, display the debug | |
| 1023 * prompt (if not already done). This shows the user that an ":endif" | |
| 1024 * is executed when the ":if" or a previous ":elseif" was not TRUE. | |
| 1025 * Handle a ">quit" debug command as if an interrupt had occurred before | |
| 1026 * the ":endif". That is, throw an interrupt exception if appropriate. | |
| 1027 * Doing this here prevents an exception for a parsing error being | |
| 1028 * discarded by throwing the interrupt exception later on. | |
| 1029 */ | |
|
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changeset
|
1030 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) |
| 359 | 1031 && dbg_check_skipped(eap)) |
|
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changeset
|
1032 (void)do_intthrow(cstack); |
| 7 | 1033 |
|
22551
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changeset
|
1034 leave_block(cstack); |
| 7 | 1035 } |
| 1036 } | |
| 1037 | |
| 1038 /* | |
| 1039 * ":else" and ":elseif". | |
| 1040 */ | |
| 1041 void | |
|
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7801
diff
changeset
|
1042 ex_else(exarg_T *eap) |
| 7 | 1043 { |
| 1044 int error; | |
| 1045 int skip; | |
| 1046 int result; | |
|
18904
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changeset
|
1047 cstack_T *cstack = eap->cstack; |
| 7 | 1048 |
| 1049 /* | |
| 1050 * Don't do something after an error, interrupt, or throw, or when there is | |
| 1051 * a surrounding conditional and it was not active. | |
| 1052 */ | |
| 1053 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1054 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1055 | |
| 1056 if (cstack->cs_idx < 0 | |
| 75 | 1057 || (cstack->cs_flags[cstack->cs_idx] |
|
22555
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diff
changeset
|
1058 & (CSF_WHILE | CSF_FOR | CSF_TRY | CSF_BLOCK))) |
| 7 | 1059 { |
| 1060 if (eap->cmdidx == CMD_else) | |
| 1061 { | |
|
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changeset
|
1062 eap->errmsg = _(e_else_without_if); |
| 7 | 1063 return; |
| 1064 } | |
|
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changeset
|
1065 eap->errmsg = _(e_elseif_without_if); |
| 7 | 1066 skip = TRUE; |
| 1067 } | |
| 1068 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) | |
| 1069 { | |
| 1070 if (eap->cmdidx == CMD_else) | |
| 1071 { | |
|
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|
1072 eap->errmsg = _("E583: multiple :else"); |
| 7 | 1073 return; |
| 1074 } | |
|
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changeset
|
1075 eap->errmsg = _("E584: :elseif after :else"); |
| 7 | 1076 skip = TRUE; |
| 1077 } | |
| 1078 | |
|
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changeset
|
1079 // if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it |
| 7 | 1080 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) |
| 1081 { | |
| 1082 if (eap->errmsg == NULL) | |
| 1083 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; | |
|
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changeset
|
1084 skip = TRUE; // don't evaluate an ":elseif" |
| 7 | 1085 } |
| 1086 else | |
| 1087 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE; | |
| 1088 | |
| 1089 /* | |
| 1090 * When debugging or a breakpoint was encountered, display the debug prompt | |
| 1091 * (if not already done). This shows the user that an ":else" or ":elseif" | |
| 1092 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle | |
| 1093 * a ">quit" debug command as if an interrupt had occurred before the | |
| 1094 * ":else" or ":elseif". That is, set "skip" and throw an interrupt | |
| 1095 * exception if appropriate. Doing this here prevents that an exception | |
| 1096 * for a parsing errors is discarded when throwing the interrupt exception | |
| 1097 * later on. | |
| 1098 */ | |
| 1099 if (!skip && dbg_check_skipped(eap) && got_int) | |
| 1100 { | |
| 1101 (void)do_intthrow(cstack); | |
| 1102 skip = TRUE; | |
| 1103 } | |
| 1104 | |
| 1105 if (eap->cmdidx == CMD_elseif) | |
| 1106 { | |
|
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patch 8.2.1049: Vim9: leaking memory when using continuation line
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changeset
|
1107 result = eval_to_bool(eap->arg, &error, eap, skip); |
|
20113
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patch 8.2.0612: Vim9: no check for space before #comment
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changeset
|
1108 |
|
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changeset
|
1109 // When throwing error exceptions, we want to throw always the first |
|
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changeset
|
1110 // of several errors in a row. This is what actually happens when |
|
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1111 // a conditional error was detected above and there is another failure |
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1112 // when parsing the expression. Since the skip flag is set in this |
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1113 // case, the parsing error will be ignored by emsg(). |
| 7 | 1114 if (!skip && !error) |
| 1115 { | |
| 1116 if (result) | |
| 1117 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE; | |
| 1118 else | |
| 1119 cstack->cs_flags[cstack->cs_idx] = 0; | |
| 1120 } | |
| 1121 else if (eap->errmsg == NULL) | |
|
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1122 // set TRUE, so this conditional will never get active |
| 7 | 1123 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE; |
| 1124 } | |
| 1125 else | |
| 1126 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE; | |
| 1127 } | |
| 1128 | |
| 1129 /* | |
| 75 | 1130 * Handle ":while" and ":for". |
| 7 | 1131 */ |
| 1132 void | |
|
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|
1133 ex_while(exarg_T *eap) |
| 7 | 1134 { |
| 1135 int error; | |
| 1136 int skip; | |
| 1137 int result; | |
|
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1138 cstack_T *cstack = eap->cstack; |
| 7 | 1139 |
| 1140 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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1141 eap->errmsg = _("E585: :while/:for nesting too deep"); |
| 7 | 1142 else |
| 1143 { | |
| 1144 /* | |
| 75 | 1145 * The loop flag is set when we have jumped back from the matching |
| 1146 * ":endwhile" or ":endfor". When not set, need to initialise this | |
| 1147 * cstack entry. | |
| 7 | 1148 */ |
| 75 | 1149 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) |
| 7 | 1150 { |
|
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1151 enter_block(cstack); |
| 75 | 1152 ++cstack->cs_looplevel; |
| 7 | 1153 cstack->cs_line[cstack->cs_idx] = -1; |
| 1154 } | |
| 75 | 1155 cstack->cs_flags[cstack->cs_idx] = |
| 1156 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR; | |
| 7 | 1157 |
| 1158 /* | |
| 75 | 1159 * Don't do something after an error, interrupt, or throw, or when |
| 1160 * there is a surrounding conditional and it was not active. | |
| 7 | 1161 */ |
| 1162 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1163 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 75 | 1164 if (eap->cmdidx == CMD_while) |
| 1165 { | |
| 1166 /* | |
| 1167 * ":while bool-expr" | |
| 1168 */ | |
|
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1169 result = eval_to_bool(eap->arg, &error, eap, skip); |
| 75 | 1170 } |
| 1171 else | |
| 1172 { | |
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1173 void *fi; |
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1174 evalarg_T evalarg; |
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1175 |
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1176 CLEAR_FIELD(evalarg); |
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1177 evalarg.eval_flags = skip ? 0 : EVAL_EVALUATE; |
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1178 if (getline_equal(eap->getline, eap->cookie, getsourceline)) |
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1179 { |
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1180 evalarg.eval_getline = eap->getline; |
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1181 evalarg.eval_cookie = eap->cookie; |
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|
1182 } |
| 75 | 1183 |
| 1184 /* | |
| 1185 * ":for var in list-expr" | |
| 1186 */ | |
| 1187 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) | |
| 1188 { | |
|
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1189 // Jumping here from a ":continue" or ":endfor": use the |
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1190 // previously evaluated list. |
| 79 | 1191 fi = cstack->cs_forinfo[cstack->cs_idx]; |
| 75 | 1192 error = FALSE; |
|
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1193 |
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1194 // the "in expr" is not used, skip over it |
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|
1195 skip_for_lines(fi, &evalarg); |
| 75 | 1196 } |
| 1197 else | |
| 1198 { | |
|
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1199 // Evaluate the argument and get the info in a structure. |
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1200 fi = eval_for_line(eap->arg, &error, eap, &evalarg); |
| 79 | 1201 cstack->cs_forinfo[cstack->cs_idx] = fi; |
| 75 | 1202 } |
| 1203 | |
|
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1204 // use the element at the start of the list and advance |
| 75 | 1205 if (!error && fi != NULL && !skip) |
| 1206 result = next_for_item(fi, eap->arg); | |
| 1207 else | |
| 1208 result = FALSE; | |
| 1209 | |
| 1210 if (!result) | |
| 1211 { | |
| 1212 free_for_info(fi); | |
| 79 | 1213 cstack->cs_forinfo[cstack->cs_idx] = NULL; |
| 75 | 1214 } |
|
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1215 clear_evalarg(&evalarg, eap); |
| 75 | 1216 } |
| 7 | 1217 |
| 1218 /* | |
| 75 | 1219 * If this cstack entry was just initialised and is active, set the |
| 1220 * loop flag, so do_cmdline() will set the line number in cs_line[]. | |
| 1221 * If executing the command a second time, clear the loop flag. | |
| 7 | 1222 */ |
| 1223 if (!skip && !error && result) | |
| 1224 { | |
| 75 | 1225 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE); |
| 1226 cstack->cs_lflags ^= CSL_HAD_LOOP; | |
| 7 | 1227 } |
| 1228 else | |
| 1229 { | |
| 75 | 1230 cstack->cs_lflags &= ~CSL_HAD_LOOP; |
|
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1231 // If the ":while" evaluates to FALSE or ":for" is past the end of |
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1232 // the list, show the debug prompt at the ":endwhile"/":endfor" as |
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1233 // if there was a ":break" in a ":while"/":for" evaluating to |
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1234 // TRUE. |
| 7 | 1235 if (!skip && !error) |
| 1236 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE; | |
| 1237 } | |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 /* | |
| 1242 * ":continue" | |
| 1243 */ | |
| 1244 void | |
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1245 ex_continue(exarg_T *eap) |
| 7 | 1246 { |
| 1247 int idx; | |
|
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1248 cstack_T *cstack = eap->cstack; |
| 7 | 1249 |
| 75 | 1250 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
|
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1251 eap->errmsg = _(e_continue); |
| 7 | 1252 else |
| 1253 { | |
|
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1254 // Try to find the matching ":while". This might stop at a try |
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1255 // conditional not in its finally clause (which is then to be executed |
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1256 // next). Therefor, inactivate all conditionals except the ":while" |
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1257 // itself (if reached). |
| 75 | 1258 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 840 | 1259 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1260 { |
| 79 | 1261 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 7 | 1262 |
| 1263 /* | |
| 75 | 1264 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the |
| 7 | 1265 * matching ":while". |
| 1266 */ | |
|
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1267 cstack->cs_lflags |= CSL_HAD_CONT; // let do_cmdline() handle it |
| 7 | 1268 } |
| 1269 else | |
| 1270 { | |
|
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1271 // If a try conditional not in its finally clause is reached first, |
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1272 // make the ":continue" pending for execution at the ":endtry". |
| 7 | 1273 cstack->cs_pending[idx] = CSTP_CONTINUE; |
| 1274 report_make_pending(CSTP_CONTINUE, NULL); | |
| 1275 } | |
| 1276 } | |
| 1277 } | |
| 1278 | |
| 1279 /* | |
| 1280 * ":break" | |
| 1281 */ | |
| 1282 void | |
|
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|
1283 ex_break(exarg_T *eap) |
| 7 | 1284 { |
| 1285 int idx; | |
|
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1286 cstack_T *cstack = eap->cstack; |
| 7 | 1287 |
| 75 | 1288 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) |
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1289 eap->errmsg = _(e_break); |
| 7 | 1290 else |
| 1291 { | |
|
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1292 // Inactivate conditionals until the matching ":while" or a try |
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1293 // conditional not in its finally clause (which is then to be |
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1294 // executed next) is found. In the latter case, make the ":break" |
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1295 // pending for execution at the ":endtry". |
| 75 | 1296 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE); |
| 840 | 1297 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) |
| 7 | 1298 { |
| 1299 cstack->cs_pending[idx] = CSTP_BREAK; | |
| 1300 report_make_pending(CSTP_BREAK, NULL); | |
| 1301 } | |
| 1302 } | |
| 1303 } | |
| 1304 | |
| 1305 /* | |
| 75 | 1306 * ":endwhile" and ":endfor" |
| 7 | 1307 */ |
| 1308 void | |
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|
1309 ex_endwhile(exarg_T *eap) |
| 7 | 1310 { |
|
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1311 cstack_T *cstack = eap->cstack; |
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1312 int idx; |
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1313 char *err; |
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1314 int csf; |
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1315 int fl; |
| 7 | 1316 |
| 75 | 1317 if (eap->cmdidx == CMD_endwhile) |
| 1318 { | |
| 1319 err = e_while; | |
| 1320 csf = CSF_WHILE; | |
| 1321 } | |
| 1322 else | |
| 1323 { | |
| 1324 err = e_for; | |
| 1325 csf = CSF_FOR; | |
| 1326 } | |
| 1327 | |
| 1328 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0) | |
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1329 eap->errmsg = _(err); |
| 7 | 1330 else |
| 1331 { | |
| 75 | 1332 fl = cstack->cs_flags[cstack->cs_idx]; |
| 1333 if (!(fl & csf)) | |
| 7 | 1334 { |
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1335 // If we are in a ":while" or ":for" but used the wrong endloop |
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1336 // command, do not rewind to the next enclosing ":for"/":while". |
| 75 | 1337 if (fl & CSF_WHILE) |
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1338 eap->errmsg = _("E732: Using :endfor with :while"); |
| 75 | 1339 else if (fl & CSF_FOR) |
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1340 eap->errmsg = _("E733: Using :endwhile with :for"); |
| 114 | 1341 } |
| 1342 if (!(fl & (CSF_WHILE | CSF_FOR))) | |
| 1343 { | |
| 1344 if (!(fl & CSF_TRY)) | |
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1345 eap->errmsg = _(e_endif); |
| 75 | 1346 else if (fl & CSF_FINALLY) |
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1347 eap->errmsg = _(e_endtry); |
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1348 // Try to find the matching ":while" and report what's missing. |
| 7 | 1349 for (idx = cstack->cs_idx; idx > 0; --idx) |
| 1350 { | |
| 75 | 1351 fl = cstack->cs_flags[idx]; |
| 1352 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) | |
| 7 | 1353 { |
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1354 // Give up at a try conditional not in its finally clause. |
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1355 // Ignore the ":endwhile"/":endfor". |
|
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1356 eap->errmsg = _(err); |
| 7 | 1357 return; |
| 1358 } | |
| 75 | 1359 if (fl & csf) |
| 7 | 1360 break; |
| 1361 } | |
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1362 // Cleanup and rewind all contained (and unclosed) conditionals. |
| 75 | 1363 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE); |
| 7 | 1364 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel); |
| 1365 } | |
| 1366 | |
| 1367 /* | |
| 1368 * When debugging or a breakpoint was encountered, display the debug | |
| 1369 * prompt (if not already done). This shows the user that an | |
| 75 | 1370 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or |
| 1371 * after a ":break". Handle a ">quit" debug command as if an | |
| 1372 * interrupt had occurred before the ":endwhile"/":endfor". That is, | |
| 1373 * throw an interrupt exception if appropriate. Doing this here | |
| 1374 * prevents that an exception for a parsing error is discarded when | |
| 1375 * throwing the interrupt exception later on. | |
| 7 | 1376 */ |
| 1377 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE | |
| 1378 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE) | |
| 1379 && dbg_check_skipped(eap)) | |
| 1380 (void)do_intthrow(cstack); | |
| 1381 | |
| 1382 /* | |
| 75 | 1383 * Set loop flag, so do_cmdline() will jump back to the matching |
| 1384 * ":while" or ":for". | |
| 7 | 1385 */ |
| 75 | 1386 cstack->cs_lflags |= CSL_HAD_ENDLOOP; |
| 7 | 1387 } |
| 1388 } | |
| 1389 | |
|
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1390 /* |
|
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1391 * "{" start of a block in Vim9 script |
|
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1392 */ |
|
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1393 void |
|
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1394 ex_block(exarg_T *eap) |
|
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1395 { |
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1396 cstack_T *cstack = eap->cstack; |
|
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1397 |
|
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1398 if (cstack->cs_idx == CSTACK_LEN - 1) |
|
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1399 eap->errmsg = _("E579: block nesting too deep"); |
|
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1400 else |
|
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1401 { |
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1402 enter_block(cstack); |
|
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1403 cstack->cs_flags[cstack->cs_idx] = CSF_BLOCK | CSF_ACTIVE | CSF_TRUE; |
|
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1404 } |
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1405 } |
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1406 |
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1407 /* |
|
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1408 * "}" end of a block in Vim9 script |
|
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1409 */ |
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1410 void |
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1411 ex_endblock(exarg_T *eap) |
|
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1412 { |
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1413 cstack_T *cstack = eap->cstack; |
|
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1414 |
|
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1415 if (cstack->cs_idx < 0 |
|
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1416 || (cstack->cs_flags[cstack->cs_idx] & CSF_BLOCK) == 0) |
|
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1417 eap->errmsg = _(e_endblock_without_block); |
|
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1418 else |
|
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1419 leave_block(cstack); |
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1420 } |
| 7 | 1421 |
| 1422 /* | |
| 1423 * ":throw expr" | |
| 1424 */ | |
| 1425 void | |
|
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|
1426 ex_throw(exarg_T *eap) |
| 7 | 1427 { |
| 1428 char_u *arg = eap->arg; | |
| 1429 char_u *value; | |
| 1430 | |
| 1431 if (*arg != NUL && *arg != '|' && *arg != '\n') | |
|
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1432 value = eval_to_string_skip(arg, eap, eap->skip); |
| 7 | 1433 else |
| 1434 { | |
|
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1435 emsg(_(e_argreq)); |
| 7 | 1436 value = NULL; |
| 1437 } | |
| 1438 | |
|
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1439 // On error or when an exception is thrown during argument evaluation, do |
|
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1440 // not throw. |
| 7 | 1441 if (!eap->skip && value != NULL) |
| 1442 { | |
| 1443 if (throw_exception(value, ET_USER, NULL) == FAIL) | |
| 1444 vim_free(value); | |
| 1445 else | |
| 1446 do_throw(eap->cstack); | |
| 1447 } | |
| 1448 } | |
| 1449 | |
| 1450 /* | |
| 21 | 1451 * Throw the current exception through the specified cstack. Common routine |
| 1452 * for ":throw" (user exception) and error and interrupt exceptions. Also | |
| 1453 * used for rethrowing an uncaught exception. | |
| 7 | 1454 */ |
| 1455 void | |
|
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1456 do_throw(cstack_T *cstack) |
| 7 | 1457 { |
| 1458 int idx; | |
| 1459 int inactivate_try = FALSE; | |
| 1460 | |
| 1461 /* | |
| 1462 * Cleanup and inactivate up to the next surrounding try conditional that | |
| 1463 * is not in its finally clause. Normally, do not inactivate the try | |
| 1464 * conditional itself, so that its ACTIVE flag can be tested below. But | |
| 1465 * if a previous error or interrupt has not been converted to an exception, | |
| 1466 * inactivate the try conditional, too, as if the conversion had been done, | |
| 21 | 1467 * and reset the did_emsg or got_int flag, so this won't happen again at |
| 1468 * the next surrounding try conditional. | |
| 7 | 1469 */ |
| 1880 | 1470 #ifndef THROW_ON_ERROR_TRUE |
| 7 | 1471 if (did_emsg && !THROW_ON_ERROR) |
| 1472 { | |
| 1473 inactivate_try = TRUE; | |
| 1474 did_emsg = FALSE; | |
| 1475 } | |
| 1880 | 1476 #endif |
| 1477 #ifndef THROW_ON_INTERRUPT_TRUE | |
| 7 | 1478 if (got_int && !THROW_ON_INTERRUPT) |
| 1479 { | |
| 1480 inactivate_try = TRUE; | |
| 1481 got_int = FALSE; | |
| 1482 } | |
| 1880 | 1483 #endif |
| 7 | 1484 idx = cleanup_conditionals(cstack, 0, inactivate_try); |
| 1485 if (idx >= 0) | |
| 1486 { | |
| 1487 /* | |
| 1488 * If this try conditional is active and we are before its first | |
| 21 | 1489 * ":catch", set THROWN so that the ":catch" commands will check |
| 1490 * whether the exception matches. When the exception came from any of | |
| 1491 * the catch clauses, it will be made pending at the ":finally" (if | |
| 1492 * present) and rethrown at the ":endtry". This will also happen if | |
| 1493 * the try conditional is inactive. This is the case when we are | |
| 1494 * throwing an exception due to an error or interrupt on the way from | |
| 1495 * a preceding ":continue", ":break", ":return", ":finish", error or | |
| 1496 * interrupt (not converted to an exception) to the finally clause or | |
| 1497 * from a preceding throw of a user or error or interrupt exception to | |
| 1498 * the matching catch clause or the finally clause. | |
| 7 | 1499 */ |
| 1500 if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1501 { | |
| 1502 if (cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 1503 cstack->cs_flags[idx] |= CSF_THROWN; | |
| 1504 else | |
|
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1505 // THROWN may have already been set for a catchable exception |
|
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1506 // that has been discarded. Ensure it is reset for the new |
|
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1507 // exception. |
| 7 | 1508 cstack->cs_flags[idx] &= ~CSF_THROWN; |
| 1509 } | |
| 1510 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 1511 cstack->cs_exception[idx] = current_exception; | |
| 1512 } | |
| 1513 #if 0 | |
|
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1514 // TODO: Add optimization below. Not yet done because of interface |
|
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1515 // problems to eval.c and ex_cmds2.c. (Servatius) |
| 7 | 1516 else |
| 1517 { | |
| 1518 /* | |
| 1519 * There are no catch clauses to check or finally clauses to execute. | |
| 1520 * End the current script or function. The exception will be rethrown | |
| 1521 * in the caller. | |
| 1522 */ | |
| 1523 if (getline_equal(eap->getline, eap->cookie, get_func_line)) | |
| 1524 current_funccal->returned = TRUE; | |
| 1525 elseif (eap->get_func_line == getsourceline) | |
| 1526 ((struct source_cookie *)eap->cookie)->finished = TRUE; | |
| 1527 } | |
| 1528 #endif | |
| 1529 | |
| 1530 did_throw = TRUE; | |
| 1531 } | |
| 1532 | |
| 1533 /* | |
| 1534 * ":try" | |
| 1535 */ | |
| 1536 void | |
|
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1537 ex_try(exarg_T *eap) |
| 7 | 1538 { |
| 1539 int skip; | |
|
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1540 cstack_T *cstack = eap->cstack; |
| 7 | 1541 |
| 1542 if (cstack->cs_idx == CSTACK_LEN - 1) | |
|
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1543 eap->errmsg = _("E601: :try nesting too deep"); |
| 7 | 1544 else |
| 1545 { | |
|
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|
1546 enter_block(cstack); |
| 7 | 1547 ++cstack->cs_trylevel; |
| 1548 cstack->cs_flags[cstack->cs_idx] = CSF_TRY; | |
| 1549 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE; | |
| 1550 | |
| 1551 /* | |
| 1552 * Don't do something after an error, interrupt, or throw, or when there | |
| 1553 * is a surrounding conditional and it was not active. | |
| 1554 */ | |
| 1555 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0 | |
| 1556 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE)); | |
| 1557 | |
| 1558 if (!skip) | |
| 1559 { | |
|
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1560 // Set ACTIVE and TRUE. TRUE means that the corresponding ":catch" |
|
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1561 // commands should check for a match if an exception is thrown and |
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1562 // that the finally clause needs to be executed. |
| 7 | 1563 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE; |
| 1564 | |
| 1565 /* | |
| 1566 * ":silent!", even when used in a try conditional, disables | |
| 1567 * displaying of error messages and conversion of errors to | |
| 1568 * exceptions. When the silent commands again open a try | |
| 1569 * conditional, save "emsg_silent" and reset it so that errors are | |
| 1570 * again converted to exceptions. The value is restored when that | |
| 1571 * try conditional is left. If it is left normally, the commands | |
| 1572 * following the ":endtry" are again silent. If it is left by | |
| 1573 * a ":continue", ":break", ":return", or ":finish", the commands | |
| 1574 * executed next are again silent. If it is left due to an | |
| 1575 * aborting error, an interrupt, or an exception, restoring | |
| 1576 * "emsg_silent" does not matter since we are already in the | |
| 1577 * aborting state and/or the exception has already been thrown. | |
| 1578 * The effect is then just freeing the memory that was allocated | |
| 1579 * to save the value. | |
| 1580 */ | |
| 1581 if (emsg_silent) | |
| 1582 { | |
| 1583 eslist_T *elem; | |
| 1584 | |
|
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1585 elem = ALLOC_ONE(struct eslist_elem); |
| 7 | 1586 if (elem == NULL) |
|
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1587 emsg(_(e_outofmem)); |
| 7 | 1588 else |
| 1589 { | |
| 1590 elem->saved_emsg_silent = emsg_silent; | |
| 1591 elem->next = cstack->cs_emsg_silent_list; | |
| 1592 cstack->cs_emsg_silent_list = elem; | |
| 1593 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT; | |
| 1594 emsg_silent = 0; | |
| 1595 } | |
| 1596 } | |
| 1597 } | |
| 1598 | |
| 1599 } | |
| 1600 } | |
| 1601 | |
| 1602 /* | |
| 1603 * ":catch /{pattern}/" and ":catch" | |
| 1604 */ | |
| 1605 void | |
|
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|
1606 ex_catch(exarg_T *eap) |
| 7 | 1607 { |
| 1608 int idx = 0; | |
| 1609 int give_up = FALSE; | |
| 1610 int skip = FALSE; | |
| 1611 int caught = FALSE; | |
| 1612 char_u *end; | |
| 1613 int save_char = 0; | |
| 1614 char_u *save_cpo; | |
| 1615 regmatch_T regmatch; | |
| 1616 int prev_got_int; | |
|
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1617 cstack_T *cstack = eap->cstack; |
| 7 | 1618 char_u *pat; |
| 1619 | |
| 1620 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
| 1621 { | |
|
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1622 eap->errmsg = _(e_catch); |
| 7 | 1623 give_up = TRUE; |
| 1624 } | |
| 1625 else | |
| 1626 { | |
| 1627 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1628 { | |
|
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1629 // Report what's missing if the matching ":try" is not in its |
|
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1630 // finally clause. |
| 75 | 1631 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1632 skip = TRUE; |
| 1633 } | |
| 1634 for (idx = cstack->cs_idx; idx > 0; --idx) | |
| 1635 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1636 break; | |
| 1637 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1638 { | |
|
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1639 // Give up for a ":catch" after ":finally" and ignore it. |
|
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1640 // Just parse. |
|
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changeset
|
1641 eap->errmsg = _("E604: :catch after :finally"); |
| 7 | 1642 give_up = TRUE; |
| 1643 } | |
| 79 | 1644 else |
| 75 | 1645 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1646 &cstack->cs_looplevel); | |
| 7 | 1647 } |
| 1648 | |
|
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parents:
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diff
changeset
|
1649 if (ends_excmd2(eap->cmd, eap->arg)) // no argument, catch all errors |
| 7 | 1650 { |
| 1651 pat = (char_u *)".*"; | |
| 1652 end = NULL; | |
| 1653 eap->nextcmd = find_nextcmd(eap->arg); | |
| 1654 } | |
| 1655 else | |
| 1656 { | |
| 1657 pat = eap->arg + 1; | |
|
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|
1658 end = skip_regexp_err(pat, *eap->arg, TRUE); |
|
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|
1659 if (end == NULL) |
|
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|
1660 give_up = TRUE; |
| 7 | 1661 } |
| 1662 | |
| 1663 if (!give_up) | |
| 1664 { | |
| 1665 /* | |
| 1666 * Don't do something when no exception has been thrown or when the | |
| 1667 * corresponding try block never got active (because of an inactive | |
| 1668 * surrounding conditional or after an error or interrupt or throw). | |
| 1669 */ | |
| 1670 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE)) | |
| 1671 skip = TRUE; | |
| 1672 | |
| 1673 /* | |
| 1674 * Check for a match only if an exception is thrown but not caught by | |
| 1675 * a previous ":catch". An exception that has replaced a discarded | |
| 1676 * exception is not checked (THROWN is not set then). | |
| 1677 */ | |
| 1678 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN) | |
| 1679 && !(cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 1680 { | |
|
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|
1681 if (end != NULL && *end != NUL |
|
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|
1682 && !ends_excmd2(end, skipwhite(end + 1))) |
| 7 | 1683 { |
|
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patch 8.2.1281: the "trailing characters" error can be hard to understand
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|
1684 semsg(_(e_trailing_arg), end); |
| 7 | 1685 return; |
| 1686 } | |
| 1687 | |
|
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|
1688 // When debugging or a breakpoint was encountered, display the |
|
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|
1689 // debug prompt (if not already done) before checking for a match. |
|
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1690 // This is a helpful hint for the user when the regular expression |
|
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|
1691 // matching fails. Handle a ">quit" debug command as if an |
|
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|
1692 // interrupt had occurred before the ":catch". That is, discard |
|
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|
1693 // the original exception, replace it by an interrupt exception, |
|
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1694 // and don't catch it in this try block. |
| 7 | 1695 if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) |
| 1696 { | |
|
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1697 // Terminate the pattern and avoid the 'l' flag in 'cpoptions' |
|
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|
1698 // while compiling it. |
| 7 | 1699 if (end != NULL) |
| 1700 { | |
| 1701 save_char = *end; | |
| 1702 *end = NUL; | |
| 1703 } | |
| 1704 save_cpo = p_cpo; | |
|
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|
1705 p_cpo = empty_option; |
|
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1706 // Disable error messages, it will make current_exception |
|
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1707 // invalid. |
|
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|
1708 ++emsg_off; |
| 1333 | 1709 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); |
|
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|
1710 --emsg_off; |
| 7 | 1711 regmatch.rm_ic = FALSE; |
| 1712 if (end != NULL) | |
| 1713 *end = save_char; | |
| 1714 p_cpo = save_cpo; | |
| 1715 if (regmatch.regprog == NULL) | |
|
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|
1716 semsg(_(e_invarg2), pat); |
| 7 | 1717 else |
| 1718 { | |
| 1719 /* | |
| 1720 * Save the value of got_int and reset it. We don't want | |
| 1721 * a previous interruption cancel matching, only hitting | |
| 1722 * CTRL-C while matching should abort it. | |
| 1723 */ | |
| 1724 prev_got_int = got_int; | |
| 1725 got_int = FALSE; | |
|
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|
1726 caught = vim_regexec_nl(®match, |
|
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|
1727 (char_u *)current_exception->value, (colnr_T)0); |
| 7 | 1728 got_int |= prev_got_int; |
|
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1729 vim_regfree(regmatch.regprog); |
| 7 | 1730 } |
| 1731 } | |
| 1732 } | |
| 1733 | |
| 1734 if (caught) | |
| 1735 { | |
|
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1736 // Make this ":catch" clause active and reset did_emsg, got_int, |
|
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|
1737 // and did_throw. Put the exception on the caught stack. |
| 7 | 1738 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT; |
| 1739 did_emsg = got_int = did_throw = FALSE; | |
| 1740 catch_exception((except_T *)cstack->cs_exception[idx]); | |
|
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|
1741 // It's mandatory that the current exception is stored in the cstack |
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1742 // so that it can be discarded at the next ":catch", ":finally", or |
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|
1743 // ":endtry" or when the catch clause is left by a ":continue", |
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1744 // ":break", ":return", ":finish", error, interrupt, or another |
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1745 // exception. |
| 7 | 1746 if (cstack->cs_exception[cstack->cs_idx] != current_exception) |
|
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|
1747 internal_error("ex_catch()"); |
| 7 | 1748 } |
| 1749 else | |
| 1750 { | |
| 1751 /* | |
| 1752 * If there is a preceding catch clause and it caught the exception, | |
| 1753 * finish the exception now. This happens also after errors except | |
| 1754 * when this ":catch" was after the ":finally" or not within | |
| 1755 * a ":try". Make the try conditional inactive so that the | |
| 1756 * following catch clauses are skipped. On an error or interrupt | |
| 1757 * after the preceding try block or catch clause was left by | |
| 1758 * a ":continue", ":break", ":return", or ":finish", discard the | |
| 1759 * pending action. | |
| 1760 */ | |
| 1761 cleanup_conditionals(cstack, CSF_TRY, TRUE); | |
| 1762 } | |
| 1763 } | |
| 1764 | |
| 1765 if (end != NULL) | |
| 1766 eap->nextcmd = find_nextcmd(end); | |
| 1767 } | |
| 1768 | |
| 1769 /* | |
| 1770 * ":finally" | |
| 1771 */ | |
| 1772 void | |
|
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|
1773 ex_finally(exarg_T *eap) |
| 7 | 1774 { |
| 1775 int idx; | |
| 1776 int skip = FALSE; | |
| 1777 int pending = CSTP_NONE; | |
|
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1778 cstack_T *cstack = eap->cstack; |
| 7 | 1779 |
| 1780 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
|
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1781 eap->errmsg = _(e_finally); |
| 7 | 1782 else |
| 1783 { | |
| 1784 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1785 { | |
| 75 | 1786 eap->errmsg = get_end_emsg(cstack); |
| 7 | 1787 for (idx = cstack->cs_idx - 1; idx > 0; --idx) |
| 1788 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 1789 break; | |
|
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1790 // Make this error pending, so that the commands in the following |
|
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1791 // finally clause can be executed. This overrules also a pending |
|
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1792 // ":continue", ":break", ":return", or ":finish". |
| 7 | 1793 pending = CSTP_ERROR; |
| 1794 } | |
| 1795 else | |
| 1796 idx = cstack->cs_idx; | |
| 1797 | |
| 1798 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1799 { | |
|
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1800 // Give up for a multiple ":finally" and ignore it. |
|
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1801 eap->errmsg = _(e_finally_dup); |
| 7 | 1802 return; |
| 1803 } | |
| 79 | 1804 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 75 | 1805 &cstack->cs_looplevel); |
| 7 | 1806 |
| 1807 /* | |
| 1808 * Don't do something when the corresponding try block never got active | |
| 1809 * (because of an inactive surrounding conditional or after an error or | |
| 1810 * interrupt or throw) or for a ":finally" without ":try" or a multiple | |
| 1811 * ":finally". After every other error (did_emsg or the conditional | |
| 1812 * errors detected above) or after an interrupt (got_int) or an | |
| 1813 * exception (did_throw), the finally clause must be executed. | |
| 1814 */ | |
| 1815 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1816 | |
| 1817 if (!skip) | |
| 1818 { | |
|
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1819 // When debugging or a breakpoint was encountered, display the |
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1820 // debug prompt (if not already done). The user then knows that the |
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1821 // finally clause is executed. |
| 7 | 1822 if (dbg_check_skipped(eap)) |
| 1823 { | |
|
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1824 // Handle a ">quit" debug command as if an interrupt had |
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1825 // occurred before the ":finally". That is, discard the |
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1826 // original exception and replace it by an interrupt |
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1827 // exception. |
| 7 | 1828 (void)do_intthrow(cstack); |
| 1829 } | |
| 1830 | |
| 1831 /* | |
| 1832 * If there is a preceding catch clause and it caught the exception, | |
| 1833 * finish the exception now. This happens also after errors except | |
| 1834 * when this is a multiple ":finally" or one not within a ":try". | |
| 1835 * After an error or interrupt, this also discards a pending | |
| 1836 * ":continue", ":break", ":finish", or ":return" from the preceding | |
| 1837 * try block or catch clause. | |
| 1838 */ | |
| 1839 cleanup_conditionals(cstack, CSF_TRY, FALSE); | |
| 1840 | |
| 1841 /* | |
| 1842 * Make did_emsg, got_int, did_throw pending. If set, they overrule | |
| 1843 * a pending ":continue", ":break", ":return", or ":finish". Then | |
| 1844 * we have particularly to discard a pending return value (as done | |
| 1845 * by the call to cleanup_conditionals() above when did_emsg or | |
| 1846 * got_int is set). The pending values are restored by the | |
| 1847 * ":endtry", except if there is a new error, interrupt, exception, | |
| 1848 * ":continue", ":break", ":return", or ":finish" in the following | |
| 75 | 1849 * finally clause. A missing ":endwhile", ":endfor" or ":endif" |
| 1850 * detected here is treated as if did_emsg and did_throw had | |
| 1851 * already been set, respectively in case that the error is not | |
| 1852 * converted to an exception, did_throw had already been unset. | |
| 1853 * We must not set did_emsg here since that would suppress the | |
| 1854 * error message. | |
| 7 | 1855 */ |
| 1856 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) | |
| 1857 { | |
| 1858 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) | |
| 1859 { | |
| 1860 report_discard_pending(CSTP_RETURN, | |
| 68 | 1861 cstack->cs_rettv[cstack->cs_idx]); |
| 1862 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]); | |
| 7 | 1863 } |
| 1864 if (pending == CSTP_ERROR && !did_emsg) | |
| 1865 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0; | |
| 1866 else | |
| 1867 pending |= did_throw ? CSTP_THROW : 0; | |
| 1868 pending |= did_emsg ? CSTP_ERROR : 0; | |
| 1869 pending |= got_int ? CSTP_INTERRUPT : 0; | |
| 1870 cstack->cs_pending[cstack->cs_idx] = pending; | |
| 1871 | |
|
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1872 // It's mandatory that the current exception is stored in the |
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1873 // cstack so that it can be rethrown at the ":endtry" or be |
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1874 // discarded if the finally clause is left by a ":continue", |
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1875 // ":break", ":return", ":finish", error, interrupt, or another |
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1876 // exception. When emsg() is called for a missing ":endif" or |
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1877 // a missing ":endwhile"/":endfor" detected here, the |
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1878 // exception will be discarded. |
| 79 | 1879 if (did_throw && cstack->cs_exception[cstack->cs_idx] |
| 1880 != current_exception) | |
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|
1881 internal_error("ex_finally()"); |
| 7 | 1882 } |
| 1883 | |
| 1884 /* | |
| 75 | 1885 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg, |
| 22 | 1886 * got_int, and did_throw and make the finally clause active. |
| 1887 * This will happen after emsg() has been called for a missing | |
| 75 | 1888 * ":endif" or a missing ":endwhile"/":endfor" detected here, so |
| 1889 * that the following finally clause will be executed even then. | |
| 7 | 1890 */ |
| 75 | 1891 cstack->cs_lflags |= CSL_HAD_FINA; |
| 7 | 1892 } |
| 1893 } | |
| 1894 } | |
| 1895 | |
| 1896 /* | |
| 1897 * ":endtry" | |
| 1898 */ | |
| 1899 void | |
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1900 ex_endtry(exarg_T *eap) |
| 7 | 1901 { |
| 1902 int idx; | |
| 1903 int skip; | |
| 1904 int rethrow = FALSE; | |
| 1905 int pending = CSTP_NONE; | |
| 68 | 1906 void *rettv = NULL; |
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1907 cstack_T *cstack = eap->cstack; |
| 7 | 1908 |
| 1909 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) | |
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1910 eap->errmsg = _(e_no_endtry); |
| 7 | 1911 else |
| 1912 { | |
| 1913 /* | |
| 1914 * Don't do something after an error, interrupt or throw in the try | |
| 1915 * block, catch clause, or finally clause preceding this ":endtry" or | |
| 1916 * when an error or interrupt occurred after a ":continue", ":break", | |
| 1917 * ":return", or ":finish" in a try block or catch clause preceding this | |
| 1918 * ":endtry" or when the try block never got active (because of an | |
| 1919 * inactive surrounding conditional or after an error or interrupt or | |
| 1920 * throw) or when there is a surrounding conditional and it has been | |
| 1921 * made inactive by a ":continue", ":break", ":return", or ":finish" in | |
| 1922 * the finally clause. The latter case need not be tested since then | |
| 1923 * anything pending has already been discarded. */ | |
| 1924 skip = did_emsg || got_int || did_throw || | |
| 1925 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE); | |
| 1926 | |
| 1927 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) | |
| 1928 { | |
| 75 | 1929 eap->errmsg = get_end_emsg(cstack); |
|
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1930 // Find the matching ":try" and report what's missing. |
| 7 | 1931 idx = cstack->cs_idx; |
| 1932 do | |
| 1933 --idx; | |
| 1934 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY)); | |
| 75 | 1935 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR, |
| 1936 &cstack->cs_looplevel); | |
| 7 | 1937 skip = TRUE; |
| 1938 | |
| 1939 /* | |
| 1940 * If an exception is being thrown, discard it to prevent it from | |
| 1941 * being rethrown at the end of this function. It would be | |
| 1942 * discarded by the error message, anyway. Resets did_throw. | |
| 1943 * This does not affect the script termination due to the error | |
| 1944 * since "trylevel" is decremented after emsg() has been called. | |
| 1945 */ | |
| 1946 if (did_throw) | |
| 1947 discard_current_exception(); | |
| 1948 } | |
| 1949 else | |
| 1950 { | |
| 1951 idx = cstack->cs_idx; | |
| 1952 | |
| 1953 /* | |
| 1954 * If we stopped with the exception currently being thrown at this | |
| 1955 * try conditional since we didn't know that it doesn't have | |
| 1956 * a finally clause, we need to rethrow it after closing the try | |
| 1957 * conditional. | |
| 1958 */ | |
| 1959 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE) | |
| 1960 && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1961 rethrow = TRUE; | |
| 1962 } | |
| 1963 | |
|
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1964 // If there was no finally clause, show the user when debugging or |
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1965 // a breakpoint was encountered that the end of the try conditional has |
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1966 // been reached: display the debug prompt (if not already done). Do |
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1967 // this on normal control flow or when an exception was thrown, but not |
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1968 // on an interrupt or error not converted to an exception or when |
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1969 // a ":break", ":continue", ":return", or ":finish" is pending. These |
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1970 // actions are carried out immediately. |
| 7 | 1971 if ((rethrow || (!skip |
| 1972 && !(cstack->cs_flags[idx] & CSF_FINALLY) | |
| 1973 && !cstack->cs_pending[idx])) | |
| 1974 && dbg_check_skipped(eap)) | |
| 1975 { | |
|
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1976 // Handle a ">quit" debug command as if an interrupt had occurred |
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1977 // before the ":endtry". That is, throw an interrupt exception and |
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1978 // set "skip" and "rethrow". |
| 7 | 1979 if (got_int) |
| 1980 { | |
| 1981 skip = TRUE; | |
| 1982 (void)do_intthrow(cstack); | |
|
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1983 // The do_intthrow() call may have reset did_throw or |
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1984 // cstack->cs_pending[idx]. |
| 7 | 1985 rethrow = FALSE; |
| 1986 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 1987 rethrow = TRUE; | |
| 1988 } | |
| 1989 } | |
| 1990 | |
| 1991 /* | |
| 1992 * If a ":return" is pending, we need to resume it after closing the | |
| 1993 * try conditional; remember the return value. If there was a finally | |
| 1994 * clause making an exception pending, we need to rethrow it. Make it | |
| 1995 * the exception currently being thrown. | |
| 1996 */ | |
| 1997 if (!skip) | |
| 1998 { | |
| 1999 pending = cstack->cs_pending[idx]; | |
| 2000 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2001 if (pending == CSTP_RETURN) | |
| 68 | 2002 rettv = cstack->cs_rettv[idx]; |
| 7 | 2003 else if (pending & CSTP_THROW) |
| 2004 current_exception = cstack->cs_exception[idx]; | |
| 2005 } | |
| 2006 | |
| 2007 /* | |
| 2008 * Discard anything pending on an error, interrupt, or throw in the | |
| 2009 * finally clause. If there was no ":finally", discard a pending | |
| 2010 * ":continue", ":break", ":return", or ":finish" if an error or | |
| 2011 * interrupt occurred afterwards, but before the ":endtry" was reached. | |
| 2012 * If an exception was caught by the last of the catch clauses and there | |
| 2013 * was no finally clause, finish the exception now. This happens also | |
| 2014 * after errors except when this ":endtry" is not within a ":try". | |
| 2015 * Restore "emsg_silent" if it has been reset by this try conditional. | |
| 2016 */ | |
| 840 | 2017 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE); |
| 7 | 2018 |
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2019 leave_block(cstack); |
| 7 | 2020 --cstack->cs_trylevel; |
| 2021 | |
| 2022 if (!skip) | |
| 2023 { | |
| 2024 report_resume_pending(pending, | |
| 68 | 2025 (pending == CSTP_RETURN) ? rettv : |
| 7 | 2026 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 2027 switch (pending) | |
| 2028 { | |
| 2029 case CSTP_NONE: | |
| 2030 break; | |
| 2031 | |
|
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2032 // Reactivate a pending ":continue", ":break", ":return", |
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2033 // ":finish" from the try block or a catch clause of this try |
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2034 // conditional. This is skipped, if there was an error in an |
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2035 // (unskipped) conditional command or an interrupt afterwards |
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2036 // or if the finally clause is present and executed a new error, |
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2037 // interrupt, throw, ":continue", ":break", ":return", or |
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2038 // ":finish". |
| 7 | 2039 case CSTP_CONTINUE: |
| 2040 ex_continue(eap); | |
| 2041 break; | |
| 2042 case CSTP_BREAK: | |
| 2043 ex_break(eap); | |
| 2044 break; | |
| 2045 case CSTP_RETURN: | |
| 68 | 2046 do_return(eap, FALSE, FALSE, rettv); |
| 7 | 2047 break; |
| 2048 case CSTP_FINISH: | |
| 2049 do_finish(eap, FALSE); | |
| 2050 break; | |
| 2051 | |
|
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2052 // When the finally clause was entered due to an error, |
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2053 // interrupt or throw (as opposed to a ":continue", ":break", |
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2054 // ":return", or ":finish"), restore the pending values of |
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2055 // did_emsg, got_int, and did_throw. This is skipped, if there |
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2056 // was a new error, interrupt, throw, ":continue", ":break", |
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2057 // ":return", or ":finish". in the finally clause. |
| 7 | 2058 default: |
| 2059 if (pending & CSTP_ERROR) | |
| 2060 did_emsg = TRUE; | |
| 2061 if (pending & CSTP_INTERRUPT) | |
| 2062 got_int = TRUE; | |
| 2063 if (pending & CSTP_THROW) | |
| 2064 rethrow = TRUE; | |
| 2065 break; | |
| 2066 } | |
| 2067 } | |
| 2068 | |
| 2069 if (rethrow) | |
|
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2070 // Rethrow the current exception (within this cstack). |
| 7 | 2071 do_throw(cstack); |
| 2072 } | |
| 2073 } | |
| 2074 | |
| 2075 /* | |
| 36 | 2076 * enter_cleanup() and leave_cleanup() |
| 2077 * | |
| 2078 * Functions to be called before/after invoking a sequence of autocommands for | |
| 2079 * cleanup for a failed command. (Failure means here that a call to emsg() | |
| 2080 * has been made, an interrupt occurred, or there is an uncaught exception | |
| 2081 * from a previous autocommand execution of the same command.) | |
| 24 | 2082 * |
| 36 | 2083 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same |
| 2084 * pointer to leave_cleanup(). The cleanup_T structure stores the pending | |
| 2085 * error/interrupt/exception state. | |
| 2086 */ | |
| 2087 | |
| 2088 /* | |
| 2089 * This function works a bit like ex_finally() except that there was not | |
| 2090 * actually an extra try block around the part that failed and an error or | |
| 2091 * interrupt has not (yet) been converted to an exception. This function | |
| 2092 * saves the error/interrupt/ exception state and prepares for the call to | |
| 2093 * do_cmdline() that is going to be made for the cleanup autocommand | |
| 2094 * execution. | |
| 24 | 2095 */ |
| 2096 void | |
|
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2097 enter_cleanup(cleanup_T *csp) |
| 24 | 2098 { |
| 2099 int pending = CSTP_NONE; | |
| 2100 | |
| 2101 /* | |
| 2102 * Postpone did_emsg, got_int, did_throw. The pending values will be | |
| 2103 * restored by leave_cleanup() except if there was an aborting error, | |
| 2104 * interrupt, or uncaught exception after this function ends. | |
| 2105 */ | |
| 2106 if (did_emsg || got_int || did_throw || need_rethrow) | |
| 2107 { | |
| 2108 csp->pending = (did_emsg ? CSTP_ERROR : 0) | |
| 2109 | (got_int ? CSTP_INTERRUPT : 0) | |
| 2110 | (did_throw ? CSTP_THROW : 0) | |
| 2111 | (need_rethrow ? CSTP_THROW : 0); | |
| 2112 | |
|
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2113 // If we are currently throwing an exception (did_throw), save it as |
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2114 // well. On an error not yet converted to an exception, update |
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2115 // "force_abort" and reset "cause_abort" (as do_errthrow() would do). |
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2116 // This is needed for the do_cmdline() call that is going to be made |
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2117 // for autocommand execution. We need not save *msg_list because |
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2118 // there is an extra instance for every call of do_cmdline(), anyway. |
| 24 | 2119 if (did_throw || need_rethrow) |
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2120 { |
| 24 | 2121 csp->exception = current_exception; |
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2122 current_exception = NULL; |
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2123 } |
| 24 | 2124 else |
| 2125 { | |
| 2126 csp->exception = NULL; | |
| 2127 if (did_emsg) | |
| 2128 { | |
| 2129 force_abort |= cause_abort; | |
| 2130 cause_abort = FALSE; | |
| 2131 } | |
| 2132 } | |
| 2133 did_emsg = got_int = did_throw = need_rethrow = FALSE; | |
| 2134 | |
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2135 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2136 report_make_pending(pending, csp->exception); |
| 2137 } | |
| 2138 else | |
| 2139 { | |
| 2140 csp->pending = CSTP_NONE; | |
| 2141 csp->exception = NULL; | |
| 2142 } | |
| 2143 } | |
| 2144 | |
| 2145 /* | |
| 36 | 2146 * See comment above enter_cleanup() for how this function is used. |
| 2147 * | |
| 2148 * This function is a bit like ex_endtry() except that there was not actually | |
| 2149 * an extra try block around the part that failed and an error or interrupt | |
| 2150 * had not (yet) been converted to an exception when the cleanup autocommand | |
| 2151 * sequence was invoked. | |
| 2152 * | |
| 2153 * This function has to be called with the address of the cleanup_T structure | |
| 2154 * filled by enter_cleanup() as an argument; it restores the error/interrupt/ | |
| 2155 * exception state saved by that function - except there was an aborting | |
| 2156 * error, an interrupt or an uncaught exception during execution of the | |
| 2157 * cleanup autocommands. In the latter case, the saved error/interrupt/ | |
| 2158 * exception state is discarded. | |
| 24 | 2159 */ |
| 2160 void | |
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2161 leave_cleanup(cleanup_T *csp) |
| 24 | 2162 { |
| 2163 int pending = csp->pending; | |
| 2164 | |
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2165 if (pending == CSTP_NONE) // nothing to do |
| 24 | 2166 return; |
| 2167 | |
|
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2168 // If there was an aborting error, an interrupt, or an uncaught exception |
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2169 // after the corresponding call to enter_cleanup(), discard what has been |
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2170 // made pending by it. Report this to the user if required by the |
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2171 // 'verbose' option or when debugging. |
| 24 | 2172 if (aborting() || need_rethrow) |
| 2173 { | |
| 2174 if (pending & CSTP_THROW) | |
|
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2175 // Cancel the pending exception (includes report). |
| 24 | 2176 discard_exception((except_T *)csp->exception, FALSE); |
| 2177 else | |
| 2178 report_discard_pending(pending, NULL); | |
| 2179 | |
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2180 // If an error was about to be converted to an exception when |
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2181 // enter_cleanup() was called, free the message list. |
| 1046 | 2182 if (msg_list != NULL) |
| 5517 | 2183 free_global_msglist(); |
| 24 | 2184 } |
| 2185 | |
| 2186 /* | |
| 2187 * If there was no new error, interrupt, or throw between the calls | |
| 2188 * to enter_cleanup() and leave_cleanup(), restore the pending | |
| 2189 * error/interrupt/exception state. | |
| 2190 */ | |
| 2191 else | |
| 2192 { | |
| 2193 /* | |
| 2194 * If there was an exception being thrown when enter_cleanup() was | |
| 2195 * called, we need to rethrow it. Make it the exception currently | |
| 2196 * being thrown. | |
| 2197 */ | |
| 2198 if (pending & CSTP_THROW) | |
| 2199 current_exception = csp->exception; | |
| 2200 | |
| 2201 /* | |
| 2202 * If an error was about to be converted to an exception when | |
| 2203 * enter_cleanup() was called, let "cause_abort" take the part of | |
| 2204 * "force_abort" (as done by cause_errthrow()). | |
| 2205 */ | |
| 2206 else if (pending & CSTP_ERROR) | |
| 2207 { | |
| 2208 cause_abort = force_abort; | |
| 2209 force_abort = FALSE; | |
| 2210 } | |
| 2211 | |
| 2212 /* | |
| 2213 * Restore the pending values of did_emsg, got_int, and did_throw. | |
| 2214 */ | |
| 2215 if (pending & CSTP_ERROR) | |
| 2216 did_emsg = TRUE; | |
| 2217 if (pending & CSTP_INTERRUPT) | |
| 2218 got_int = TRUE; | |
| 2219 if (pending & CSTP_THROW) | |
|
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2220 need_rethrow = TRUE; // did_throw will be set by do_one_cmd() |
| 24 | 2221 |
|
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2222 // Report if required by the 'verbose' option or when debugging. |
| 24 | 2223 report_resume_pending(pending, |
| 36 | 2224 (pending & CSTP_THROW) ? (void *)current_exception : NULL); |
| 24 | 2225 } |
| 2226 } | |
| 2227 | |
| 2228 | |
| 2229 /* | |
| 7 | 2230 * Make conditionals inactive and discard what's pending in finally clauses |
| 2231 * until the conditional type searched for or a try conditional not in its | |
| 79 | 2232 * finally clause is reached. If this is in an active catch clause, finish |
| 2233 * the caught exception. | |
| 2234 * Return the cstack index where the search stopped. | |
| 75 | 2235 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0, |
| 2236 * the latter meaning the innermost try conditional not in its finally clause. | |
| 2237 * "inclusive" tells whether the conditional searched for should be made | |
| 4352 | 2238 * inactive itself (a try conditional not in its finally clause possibly find |
| 75 | 2239 * before is always made inactive). If "inclusive" is TRUE and |
| 2240 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of | |
| 2241 * "emsg_silent", if reset when the try conditional finally reached was | |
| 4352 | 2242 * entered, is restored (used by ex_endtry()). This is normally done only |
| 75 | 2243 * when such a try conditional is left. |
| 7 | 2244 */ |
| 2245 int | |
|
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2246 cleanup_conditionals( |
|
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2247 cstack_T *cstack, |
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2248 int searched_cond, |
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|
2249 int inclusive) |
| 7 | 2250 { |
| 2251 int idx; | |
| 2252 int stop = FALSE; | |
| 2253 | |
| 2254 for (idx = cstack->cs_idx; idx >= 0; --idx) | |
| 2255 { | |
| 2256 if (cstack->cs_flags[idx] & CSF_TRY) | |
| 2257 { | |
| 2258 /* | |
| 2259 * Discard anything pending in a finally clause and continue the | |
| 2260 * search. There may also be a pending ":continue", ":break", | |
| 2261 * ":return", or ":finish" before the finally clause. We must not | |
| 2262 * discard it, unless an error or interrupt occurred afterwards. | |
| 2263 */ | |
| 359 | 2264 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) |
| 7 | 2265 { |
| 2266 switch (cstack->cs_pending[idx]) | |
| 2267 { | |
| 2268 case CSTP_NONE: | |
| 2269 break; | |
| 2270 | |
| 2271 case CSTP_CONTINUE: | |
| 2272 case CSTP_BREAK: | |
| 2273 case CSTP_FINISH: | |
| 2274 report_discard_pending(cstack->cs_pending[idx], NULL); | |
| 2275 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2276 break; | |
| 2277 | |
| 2278 case CSTP_RETURN: | |
| 2279 report_discard_pending(CSTP_RETURN, | |
| 68 | 2280 cstack->cs_rettv[idx]); |
| 2281 discard_pending_return(cstack->cs_rettv[idx]); | |
| 7 | 2282 cstack->cs_pending[idx] = CSTP_NONE; |
| 2283 break; | |
| 2284 | |
| 2285 default: | |
| 2286 if (cstack->cs_flags[idx] & CSF_FINALLY) | |
| 2287 { | |
| 2288 if (cstack->cs_pending[idx] & CSTP_THROW) | |
| 2289 { | |
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2290 // Cancel the pending exception. This is in the |
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2291 // finally clause, so that the stack of the |
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2292 // caught exceptions is not involved. |
|
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2293 discard_exception( |
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2294 (except_T *)cstack->cs_exception[idx], |
| 7 | 2295 FALSE); |
| 2296 } | |
| 2297 else | |
| 2298 report_discard_pending(cstack->cs_pending[idx], | |
| 2299 NULL); | |
| 2300 cstack->cs_pending[idx] = CSTP_NONE; | |
| 2301 } | |
| 2302 break; | |
| 2303 } | |
| 2304 } | |
| 2305 | |
| 2306 /* | |
| 2307 * Stop at a try conditional not in its finally clause. If this try | |
| 2308 * conditional is in an active catch clause, finish the caught | |
| 2309 * exception. | |
| 2310 */ | |
| 2311 if (!(cstack->cs_flags[idx] & CSF_FINALLY)) | |
| 2312 { | |
| 2313 if ((cstack->cs_flags[idx] & CSF_ACTIVE) | |
| 2314 && (cstack->cs_flags[idx] & CSF_CAUGHT)) | |
| 2315 finish_exception((except_T *)cstack->cs_exception[idx]); | |
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2316 // Stop at this try conditional - except the try block never |
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2317 // got active (because of an inactive surrounding conditional |
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2318 // or when the ":try" appeared after an error or interrupt or |
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2319 // throw). |
| 7 | 2320 if (cstack->cs_flags[idx] & CSF_TRUE) |
| 2321 { | |
| 2322 if (searched_cond == 0 && !inclusive) | |
| 2323 break; | |
| 2324 stop = TRUE; | |
| 2325 } | |
| 2326 } | |
| 2327 } | |
| 2328 | |
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2329 // Stop on the searched conditional type (even when the surrounding |
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2330 // conditional is not active or something has been made pending). |
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2331 // If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT, |
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2332 // check first whether "emsg_silent" needs to be restored. |
| 7 | 2333 if (cstack->cs_flags[idx] & searched_cond) |
| 2334 { | |
| 2335 if (!inclusive) | |
| 2336 break; | |
| 2337 stop = TRUE; | |
| 2338 } | |
| 2339 cstack->cs_flags[idx] &= ~CSF_ACTIVE; | |
| 2340 if (stop && searched_cond != (CSF_TRY | CSF_SILENT)) | |
| 2341 break; | |
| 2342 | |
| 2343 /* | |
| 1214 | 2344 * When leaving a try conditional that reset "emsg_silent" on its |
| 2345 * entry after saving the original value, restore that value here and | |
| 2346 * free the memory used to store it. | |
| 7 | 2347 */ |
| 2348 if ((cstack->cs_flags[idx] & CSF_TRY) | |
| 359 | 2349 && (cstack->cs_flags[idx] & CSF_SILENT)) |
| 7 | 2350 { |
| 2351 eslist_T *elem; | |
| 2352 | |
| 2353 elem = cstack->cs_emsg_silent_list; | |
| 2354 cstack->cs_emsg_silent_list = elem->next; | |
| 2355 emsg_silent = elem->saved_emsg_silent; | |
| 2356 vim_free(elem); | |
| 2357 cstack->cs_flags[idx] &= ~CSF_SILENT; | |
| 2358 } | |
| 2359 if (stop) | |
| 2360 break; | |
| 2361 } | |
| 2362 return idx; | |
| 2363 } | |
| 2364 | |
| 2365 /* | |
| 75 | 2366 * Return an appropriate error message for a missing endwhile/endfor/endif. |
| 2367 */ | |
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2368 static char * |
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2369 get_end_emsg(cstack_T *cstack) |
| 75 | 2370 { |
| 2371 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE) | |
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2372 return _(e_endwhile); |
| 75 | 2373 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
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2374 return _(e_endfor); |
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2375 return _(e_endif); |
| 75 | 2376 } |
| 2377 | |
| 2378 | |
| 2379 /* | |
| 7 | 2380 * Rewind conditionals until index "idx" is reached. "cond_type" and |
| 2381 * "cond_level" specify a conditional type and the address of a level variable | |
| 2382 * which is to be decremented with each skipped conditional of the specified | |
| 2383 * type. | |
| 79 | 2384 * Also free "for info" structures where needed. |
| 7 | 2385 */ |
| 79 | 2386 void |
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2387 rewind_conditionals( |
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2388 cstack_T *cstack, |
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2389 int idx, |
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2390 int cond_type, |
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2391 int *cond_level) |
| 7 | 2392 { |
| 2393 while (cstack->cs_idx > idx) | |
| 2394 { | |
| 2395 if (cstack->cs_flags[cstack->cs_idx] & cond_type) | |
| 2396 --*cond_level; | |
| 79 | 2397 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR) |
| 2398 free_for_info(cstack->cs_forinfo[cstack->cs_idx]); | |
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2399 leave_block(cstack); |
| 7 | 2400 } |
| 2401 } | |
| 2402 | |
| 2403 /* | |
| 2404 * ":endfunction" when not after a ":function" | |
| 2405 */ | |
| 2406 void | |
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2407 ex_endfunction(exarg_T *eap) |
| 7 | 2408 { |
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2409 if (eap->cmdidx == CMD_enddef) |
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2410 emsg(_("E193: :enddef not inside a function")); |
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2411 else |
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2412 emsg(_("E193: :endfunction not inside a function")); |
| 7 | 2413 } |
| 2414 | |
| 2415 /* | |
| 75 | 2416 * Return TRUE if the string "p" looks like a ":while" or ":for" command. |
| 7 | 2417 */ |
| 2418 int | |
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2419 has_loop_cmd(char_u *p) |
| 7 | 2420 { |
| 1447 | 2421 int len; |
| 2422 | |
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2423 // skip modifiers, white space and ':' |
| 1447 | 2424 for (;;) |
| 2425 { | |
| 2426 while (*p == ' ' || *p == '\t' || *p == ':') | |
| 2427 ++p; | |
| 2428 len = modifier_len(p); | |
| 2429 if (len == 0) | |
| 2430 break; | |
| 2431 p += len; | |
| 2432 } | |
| 75 | 2433 if ((p[0] == 'w' && p[1] == 'h') |
| 2434 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r')) | |
| 7 | 2435 return TRUE; |
| 2436 return FALSE; | |
| 2437 } | |
| 2438 | |
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2439 #endif // FEAT_EVAL |