Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1 | /* vi:set ts=8 sts=4 sw=4 noet: |
| 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 | * vim9cmds.c: Dealing with commands of a compiled function |
| 12 | */ |
| 13 | |
| 14 | #define USING_FLOAT_STUFF |
| 15 | #include "vim.h" |
| 16 | |
| 17 | #if defined(FEAT_EVAL) || defined(PROTO) |
| 18 | |
| 19 | // When not generating protos this is included in proto.h |
| 20 | #ifdef PROTO |
| 21 | # include "vim9.h" |
| 22 | #endif |
| 23 | |
| 24 | /* |
| 25 | * Get the index of the current instruction. |
| 26 | * This compensates for a preceding ISN_CMDMOD and ISN_PROF_START. |
| 27 | */ |
| 28 | static int |
| 29 | current_instr_idx(cctx_T *cctx) |
| 30 | { |
| 31 | garray_T *instr = &cctx->ctx_instr; |
| 32 | int idx = instr->ga_len; |
| 33 | |
| 34 | while (idx > 0) |
| 35 | { |
| 36 | if (cctx->ctx_has_cmdmod && ((isn_T *)instr->ga_data)[idx - 1] |
| 37 | .isn_type == ISN_CMDMOD) |
| 38 | { |
| 39 | --idx; |
| 40 | continue; |
| 41 | } |
| 42 | #ifdef FEAT_PROFILE |
| 43 | if (((isn_T *)instr->ga_data)[idx - 1].isn_type == ISN_PROF_START) |
| 44 | { |
| 45 | --idx; |
| 46 | continue; |
| 47 | } |
| 48 | #endif |
| 49 | if (((isn_T *)instr->ga_data)[idx - 1].isn_type == ISN_DEBUG) |
| 50 | { |
| 51 | --idx; |
| 52 | continue; |
| 53 | } |
| 54 | break; |
| 55 | } |
| 56 | return idx; |
| 57 | } |
| 58 | /* |
| 59 | * Remove local variables above "new_top". |
| 60 | */ |
| 61 | static void |
| 62 | unwind_locals(cctx_T *cctx, int new_top) |
| 63 | { |
| 64 | if (cctx->ctx_locals.ga_len > new_top) |
| 65 | { |
| 66 | int idx; |
| 67 | lvar_T *lvar; |
| 68 | |
| 69 | for (idx = new_top; idx < cctx->ctx_locals.ga_len; ++idx) |
| 70 | { |
| 71 | lvar = ((lvar_T *)cctx->ctx_locals.ga_data) + idx; |
| 72 | vim_free(lvar->lv_name); |
| 73 | } |
| 74 | } |
| 75 | cctx->ctx_locals.ga_len = new_top; |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Free all local variables. |
| 80 | */ |
| 81 | void |
| 82 | free_locals(cctx_T *cctx) |
| 83 | { |
| 84 | unwind_locals(cctx, 0); |
| 85 | ga_clear(&cctx->ctx_locals); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* |
| 90 | * Check if "name" can be "unlet". |
| 91 | */ |
| 92 | int |
| 93 | check_vim9_unlet(char_u *name) |
| 94 | { |
| 95 | if (name[1] != ':' || vim_strchr((char_u *)"gwtb", *name) == NULL) |
| 96 | { |
| 97 | // "unlet s:var" is allowed in legacy script. |
| 98 | if (*name == 's' && !script_is_vim9()) |
| 99 | return OK; |
| 100 | semsg(_(e_cannot_unlet_str), name); |
| 101 | return FAIL; |
| 102 | } |
| 103 | return OK; |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Callback passed to ex_unletlock(). |
| 108 | */ |
| 109 | static int |
| 110 | compile_unlet( |
| 111 | lval_T *lvp, |
| 112 | char_u *name_end, |
| 113 | exarg_T *eap, |
| 114 | int deep UNUSED, |
| 115 | void *coookie) |
| 116 | { |
| 117 | cctx_T *cctx = coookie; |
| 118 | char_u *p = lvp->ll_name; |
| 119 | int cc = *name_end; |
| 120 | int ret = OK; |
| 121 | |
| 122 | if (cctx->ctx_skip == SKIP_YES) |
| 123 | return OK; |
| 124 | |
| 125 | *name_end = NUL; |
| 126 | if (*p == '$') |
| 127 | { |
| 128 | // :unlet $ENV_VAR |
| 129 | ret = generate_UNLET(cctx, ISN_UNLETENV, p + 1, eap->forceit); |
| 130 | } |
| 131 | else if (vim_strchr(p, '.') != NULL || vim_strchr(p, '[') != NULL) |
| 132 | { |
| 133 | lhs_T lhs; |
| 134 | |
| 135 | // This is similar to assigning: lookup the list/dict, compile the |
| 136 | // idx/key. Then instead of storing the value unlet the item. |
| 137 | // unlet {list}[idx] |
| 138 | // unlet {dict}[key] dict.key |
| 139 | // |
| 140 | // Figure out the LHS type and other properties. |
| 141 | // |
| 142 | ret = compile_lhs(p, &lhs, CMD_unlet, FALSE, 0, cctx); |
| 143 | |
| 144 | // : unlet an indexed item |
| 145 | if (!lhs.lhs_has_index) |
| 146 | { |
| 147 | iemsg("called compile_lhs() without an index"); |
| 148 | ret = FAIL; |
| 149 | } |
| 150 | else |
| 151 | { |
| 152 | // Use the info in "lhs" to unlet the item at the index in the |
| 153 | // list or dict. |
| 154 | ret = compile_assign_unlet(p, &lhs, FALSE, &t_void, cctx); |
| 155 | } |
| 156 | |
| 157 | vim_free(lhs.lhs_name); |
| 158 | } |
| 159 | else if (check_vim9_unlet(p) == FAIL) |
| 160 | { |
| 161 | ret = FAIL; |
| 162 | } |
| 163 | else |
| 164 | { |
| 165 | // Normal name. Only supports g:, w:, t: and b: namespaces. |
| 166 | ret = generate_UNLET(cctx, ISN_UNLET, p, eap->forceit); |
| 167 | } |
| 168 | |
| 169 | *name_end = cc; |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | * Callback passed to ex_unletlock(). |
| 175 | */ |
| 176 | static int |
| 177 | compile_lock_unlock( |
| 178 | lval_T *lvp, |
| 179 | char_u *name_end, |
| 180 | exarg_T *eap, |
| 181 | int deep UNUSED, |
| 182 | void *coookie) |
| 183 | { |
| 184 | cctx_T *cctx = coookie; |
| 185 | int cc = *name_end; |
| 186 | char_u *p = lvp->ll_name; |
| 187 | int ret = OK; |
| 188 | size_t len; |
| 189 | char_u *buf; |
| 190 | isntype_T isn = ISN_EXEC; |
| 191 | |
| 192 | if (cctx->ctx_skip == SKIP_YES) |
| 193 | return OK; |
| 194 | |
| 195 | // Cannot use :lockvar and :unlockvar on local variables. |
| 196 | if (p[1] != ':') |
| 197 | { |
| 198 | char_u *end = find_name_end(p, NULL, NULL, FNE_CHECK_START); |
| 199 | |
| 200 | if (lookup_local(p, end - p, NULL, cctx) == OK) |
| 201 | { |
| 202 | char_u *s = p; |
| 203 | |
| 204 | if (*end != '.' && *end != '[') |
| 205 | { |
| 206 | emsg(_(e_cannot_lock_unlock_local_variable)); |
| 207 | return FAIL; |
| 208 | } |
| 209 | |
| 210 | // For "d.member" put the local variable on the stack, it will be |
| 211 | // passed to ex_lockvar() indirectly. |
| 212 | if (compile_load(&s, end, cctx, FALSE, FALSE) == FAIL) |
| 213 | return FAIL; |
| 214 | isn = ISN_LOCKUNLOCK; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | // Checking is done at runtime. |
| 219 | *name_end = NUL; |
| 220 | len = name_end - p + 20; |
| 221 | buf = alloc(len); |
| 222 | if (buf == NULL) |
| 223 | ret = FAIL; |
| 224 | else |
| 225 | { |
| 226 | vim_snprintf((char *)buf, len, "%s %s", |
| 227 | eap->cmdidx == CMD_lockvar ? "lockvar" : "unlockvar", |
| 228 | p); |
| 229 | ret = generate_EXEC_copy(cctx, isn, buf); |
| 230 | |
| 231 | vim_free(buf); |
| 232 | *name_end = cc; |
| 233 | } |
| 234 | return ret; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * compile "unlet var", "lock var" and "unlock var" |
| 239 | * "arg" points to "var". |
| 240 | */ |
| 241 | char_u * |
| 242 | compile_unletlock(char_u *arg, exarg_T *eap, cctx_T *cctx) |
| 243 | { |
| 244 | ex_unletlock(eap, arg, 0, GLV_NO_AUTOLOAD | GLV_COMPILING, |
| 245 | eap->cmdidx == CMD_unlet ? compile_unlet : compile_lock_unlock, |
| 246 | cctx); |
| 247 | return eap->nextcmd == NULL ? (char_u *)"" : eap->nextcmd; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * generate a jump to the ":endif"/":endfor"/":endwhile"/":finally"/":endtry". |
| 252 | */ |
| 253 | static int |
| 254 | compile_jump_to_end(endlabel_T **el, jumpwhen_T when, cctx_T *cctx) |
| 255 | { |
| 256 | garray_T *instr = &cctx->ctx_instr; |
| 257 | endlabel_T *endlabel = ALLOC_CLEAR_ONE(endlabel_T); |
| 258 | |
| 259 | if (endlabel == NULL) |
| 260 | return FAIL; |
| 261 | endlabel->el_next = *el; |
| 262 | *el = endlabel; |
| 263 | endlabel->el_end_label = instr->ga_len; |
| 264 | |
| 265 | generate_JUMP(cctx, when, 0); |
| 266 | return OK; |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | compile_fill_jump_to_end(endlabel_T **el, int jump_where, cctx_T *cctx) |
| 271 | { |
| 272 | garray_T *instr = &cctx->ctx_instr; |
| 273 | |
| 274 | while (*el != NULL) |
| 275 | { |
| 276 | endlabel_T *cur = (*el); |
| 277 | isn_T *isn; |
| 278 | |
| 279 | isn = ((isn_T *)instr->ga_data) + cur->el_end_label; |
| 280 | isn->isn_arg.jump.jump_where = jump_where; |
| 281 | *el = cur->el_next; |
| 282 | vim_free(cur); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | static void |
| 287 | compile_free_jump_to_end(endlabel_T **el) |
| 288 | { |
| 289 | while (*el != NULL) |
| 290 | { |
| 291 | endlabel_T *cur = (*el); |
| 292 | |
| 293 | *el = cur->el_next; |
| 294 | vim_free(cur); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Create a new scope and set up the generic items. |
| 300 | */ |
| 301 | static scope_T * |
| 302 | new_scope(cctx_T *cctx, scopetype_T type) |
| 303 | { |
| 304 | scope_T *scope = ALLOC_CLEAR_ONE(scope_T); |
| 305 | |
| 306 | if (scope == NULL) |
| 307 | return NULL; |
| 308 | scope->se_outer = cctx->ctx_scope; |
| 309 | cctx->ctx_scope = scope; |
| 310 | scope->se_type = type; |
| 311 | scope->se_local_count = cctx->ctx_locals.ga_len; |
| 312 | return scope; |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * Free the current scope and go back to the outer scope. |
| 317 | */ |
| 318 | void |
| 319 | drop_scope(cctx_T *cctx) |
| 320 | { |
| 321 | scope_T *scope = cctx->ctx_scope; |
| 322 | |
| 323 | if (scope == NULL) |
| 324 | { |
| 325 | iemsg("calling drop_scope() without a scope"); |
| 326 | return; |
| 327 | } |
| 328 | cctx->ctx_scope = scope->se_outer; |
| 329 | switch (scope->se_type) |
| 330 | { |
| 331 | case IF_SCOPE: |
| 332 | compile_free_jump_to_end(&scope->se_u.se_if.is_end_label); break; |
| 333 | case FOR_SCOPE: |
| 334 | compile_free_jump_to_end(&scope->se_u.se_for.fs_end_label); break; |
| 335 | case WHILE_SCOPE: |
| 336 | compile_free_jump_to_end(&scope->se_u.se_while.ws_end_label); break; |
| 337 | case TRY_SCOPE: |
| 338 | compile_free_jump_to_end(&scope->se_u.se_try.ts_end_label); break; |
| 339 | case NO_SCOPE: |
| 340 | case BLOCK_SCOPE: |
| 341 | break; |
| 342 | } |
| 343 | vim_free(scope); |
| 344 | } |
| 345 | |
| 346 | static int |
| 347 | misplaced_cmdmod(cctx_T *cctx) |
| 348 | { |
| 349 | garray_T *instr = &cctx->ctx_instr; |
| 350 | |
| 351 | if (cctx->ctx_has_cmdmod |
| 352 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1].isn_type |
| 353 | == ISN_CMDMOD) |
| 354 | { |
| 355 | emsg(_(e_misplaced_command_modifier)); |
| 356 | return TRUE; |
| 357 | } |
| 358 | return FALSE; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * compile "if expr" |
| 363 | * |
| 364 | * "if expr" Produces instructions: |
| 365 | * EVAL expr Push result of "expr" |
| 366 | * JUMP_IF_FALSE end |
| 367 | * ... body ... |
| 368 | * end: |
| 369 | * |
| 370 | * "if expr | else" Produces instructions: |
| 371 | * EVAL expr Push result of "expr" |
| 372 | * JUMP_IF_FALSE else |
| 373 | * ... body ... |
| 374 | * JUMP_ALWAYS end |
| 375 | * else: |
| 376 | * ... body ... |
| 377 | * end: |
| 378 | * |
| 379 | * "if expr1 | elseif expr2 | else" Produces instructions: |
| 380 | * EVAL expr Push result of "expr" |
| 381 | * JUMP_IF_FALSE elseif |
| 382 | * ... body ... |
| 383 | * JUMP_ALWAYS end |
| 384 | * elseif: |
| 385 | * EVAL expr Push result of "expr" |
| 386 | * JUMP_IF_FALSE else |
| 387 | * ... body ... |
| 388 | * JUMP_ALWAYS end |
| 389 | * else: |
| 390 | * ... body ... |
| 391 | * end: |
| 392 | */ |
| 393 | char_u * |
| 394 | compile_if(char_u *arg, cctx_T *cctx) |
| 395 | { |
| 396 | char_u *p = arg; |
| 397 | garray_T *instr = &cctx->ctx_instr; |
| 398 | int instr_count = instr->ga_len; |
| 399 | scope_T *scope; |
| 400 | skip_T skip_save = cctx->ctx_skip; |
| 401 | ppconst_T ppconst; |
| 402 | |
| 403 | CLEAR_FIELD(ppconst); |
| 404 | if (compile_expr1(&p, cctx, &ppconst) == FAIL) |
| 405 | { |
| 406 | clear_ppconst(&ppconst); |
| 407 | return NULL; |
| 408 | } |
| 409 | if (!ends_excmd2(arg, skipwhite(p))) |
| 410 | { |
Bram Moolenaar | 74409f6 | 2022-01-01 15:58:22 +0000 | [diff] [blame] | 411 | semsg(_(e_trailing_characters_str), p); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 412 | return NULL; |
| 413 | } |
| 414 | if (cctx->ctx_skip == SKIP_YES) |
| 415 | clear_ppconst(&ppconst); |
| 416 | else if (instr->ga_len == instr_count && ppconst.pp_used == 1) |
| 417 | { |
| 418 | int error = FALSE; |
| 419 | int v; |
| 420 | |
| 421 | // The expression results in a constant. |
| 422 | v = tv_get_bool_chk(&ppconst.pp_tv[0], &error); |
| 423 | clear_ppconst(&ppconst); |
| 424 | if (error) |
| 425 | return NULL; |
| 426 | cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES; |
| 427 | } |
| 428 | else |
| 429 | { |
| 430 | // Not a constant, generate instructions for the expression. |
| 431 | cctx->ctx_skip = SKIP_UNKNOWN; |
| 432 | if (generate_ppconst(cctx, &ppconst) == FAIL) |
| 433 | return NULL; |
| 434 | if (bool_on_stack(cctx) == FAIL) |
| 435 | return NULL; |
| 436 | } |
| 437 | |
| 438 | // CMDMOD_REV must come before the jump |
| 439 | generate_undo_cmdmods(cctx); |
| 440 | |
| 441 | scope = new_scope(cctx, IF_SCOPE); |
| 442 | if (scope == NULL) |
| 443 | return NULL; |
| 444 | scope->se_skip_save = skip_save; |
| 445 | // "is_had_return" will be reset if any block does not end in :return |
| 446 | scope->se_u.se_if.is_had_return = TRUE; |
| 447 | |
| 448 | if (cctx->ctx_skip == SKIP_UNKNOWN) |
| 449 | { |
| 450 | // "where" is set when ":elseif", "else" or ":endif" is found |
| 451 | scope->se_u.se_if.is_if_label = instr->ga_len; |
| 452 | generate_JUMP(cctx, JUMP_IF_FALSE, 0); |
| 453 | } |
| 454 | else |
| 455 | scope->se_u.se_if.is_if_label = -1; |
| 456 | |
| 457 | #ifdef FEAT_PROFILE |
| 458 | if (cctx->ctx_compile_type == CT_PROFILE && cctx->ctx_skip == SKIP_YES |
| 459 | && skip_save != SKIP_YES) |
| 460 | { |
| 461 | // generated a profile start, need to generate a profile end, since it |
| 462 | // won't be done after returning |
| 463 | cctx->ctx_skip = SKIP_NOT; |
| 464 | generate_instr(cctx, ISN_PROF_END); |
| 465 | cctx->ctx_skip = SKIP_YES; |
| 466 | } |
| 467 | #endif |
| 468 | |
| 469 | return p; |
| 470 | } |
| 471 | |
| 472 | char_u * |
| 473 | compile_elseif(char_u *arg, cctx_T *cctx) |
| 474 | { |
| 475 | char_u *p = arg; |
| 476 | garray_T *instr = &cctx->ctx_instr; |
| 477 | int instr_count; |
| 478 | isn_T *isn; |
| 479 | scope_T *scope = cctx->ctx_scope; |
| 480 | ppconst_T ppconst; |
| 481 | skip_T save_skip = cctx->ctx_skip; |
| 482 | |
| 483 | if (scope == NULL || scope->se_type != IF_SCOPE) |
| 484 | { |
| 485 | emsg(_(e_elseif_without_if)); |
| 486 | return NULL; |
| 487 | } |
| 488 | unwind_locals(cctx, scope->se_local_count); |
| 489 | if (!cctx->ctx_had_return) |
| 490 | scope->se_u.se_if.is_had_return = FALSE; |
| 491 | |
| 492 | if (cctx->ctx_skip == SKIP_NOT) |
| 493 | { |
| 494 | // previous block was executed, this one and following will not |
| 495 | cctx->ctx_skip = SKIP_YES; |
| 496 | scope->se_u.se_if.is_seen_skip_not = TRUE; |
| 497 | } |
| 498 | if (scope->se_u.se_if.is_seen_skip_not) |
| 499 | { |
| 500 | // A previous block was executed, skip over expression and bail out. |
| 501 | // Do not count the "elseif" for profiling and cmdmod |
| 502 | instr->ga_len = current_instr_idx(cctx); |
| 503 | |
| 504 | skip_expr_cctx(&p, cctx); |
| 505 | return p; |
| 506 | } |
| 507 | |
| 508 | if (cctx->ctx_skip == SKIP_UNKNOWN) |
| 509 | { |
| 510 | int moved_cmdmod = FALSE; |
| 511 | int saved_debug = FALSE; |
| 512 | isn_T debug_isn; |
| 513 | |
| 514 | // Move any CMDMOD instruction to after the jump |
| 515 | if (((isn_T *)instr->ga_data)[instr->ga_len - 1].isn_type == ISN_CMDMOD) |
| 516 | { |
| 517 | if (GA_GROW_FAILS(instr, 1)) |
| 518 | return NULL; |
| 519 | ((isn_T *)instr->ga_data)[instr->ga_len] = |
| 520 | ((isn_T *)instr->ga_data)[instr->ga_len - 1]; |
| 521 | --instr->ga_len; |
| 522 | moved_cmdmod = TRUE; |
| 523 | } |
| 524 | |
| 525 | // Remove the already generated ISN_DEBUG, it is written below the |
| 526 | // ISN_FOR instruction. |
| 527 | if (cctx->ctx_compile_type == CT_DEBUG && instr->ga_len > 0 |
| 528 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1] |
| 529 | .isn_type == ISN_DEBUG) |
| 530 | { |
| 531 | --instr->ga_len; |
| 532 | debug_isn = ((isn_T *)instr->ga_data)[instr->ga_len]; |
| 533 | saved_debug = TRUE; |
| 534 | } |
| 535 | |
| 536 | if (compile_jump_to_end(&scope->se_u.se_if.is_end_label, |
| 537 | JUMP_ALWAYS, cctx) == FAIL) |
| 538 | return NULL; |
| 539 | // previous "if" or "elseif" jumps here |
| 540 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label; |
| 541 | isn->isn_arg.jump.jump_where = instr->ga_len; |
| 542 | |
| 543 | if (moved_cmdmod) |
| 544 | ++instr->ga_len; |
| 545 | |
| 546 | if (saved_debug) |
| 547 | { |
| 548 | // move the debug instruction here |
| 549 | if (GA_GROW_FAILS(instr, 1)) |
| 550 | return NULL; |
| 551 | ((isn_T *)instr->ga_data)[instr->ga_len] = debug_isn; |
| 552 | ++instr->ga_len; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | // compile "expr"; if we know it evaluates to FALSE skip the block |
| 557 | CLEAR_FIELD(ppconst); |
| 558 | if (cctx->ctx_skip == SKIP_YES) |
| 559 | { |
| 560 | cctx->ctx_skip = SKIP_UNKNOWN; |
| 561 | #ifdef FEAT_PROFILE |
| 562 | if (cctx->ctx_compile_type == CT_PROFILE) |
| 563 | // the previous block was skipped, need to profile this line |
| 564 | generate_instr(cctx, ISN_PROF_START); |
| 565 | #endif |
| 566 | if (cctx->ctx_compile_type == CT_DEBUG) |
| 567 | // the previous block was skipped, may want to debug this line |
| 568 | generate_instr_debug(cctx); |
| 569 | } |
| 570 | |
| 571 | instr_count = instr->ga_len; |
| 572 | if (compile_expr1(&p, cctx, &ppconst) == FAIL) |
| 573 | { |
| 574 | clear_ppconst(&ppconst); |
| 575 | return NULL; |
| 576 | } |
| 577 | cctx->ctx_skip = save_skip; |
| 578 | if (!ends_excmd2(arg, skipwhite(p))) |
| 579 | { |
| 580 | clear_ppconst(&ppconst); |
Bram Moolenaar | 74409f6 | 2022-01-01 15:58:22 +0000 | [diff] [blame] | 581 | semsg(_(e_trailing_characters_str), p); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 582 | return NULL; |
| 583 | } |
| 584 | if (scope->se_skip_save == SKIP_YES) |
| 585 | clear_ppconst(&ppconst); |
| 586 | else if (instr->ga_len == instr_count && ppconst.pp_used == 1) |
| 587 | { |
| 588 | int error = FALSE; |
| 589 | int v; |
| 590 | |
| 591 | // The expression result is a constant. |
| 592 | v = tv_get_bool_chk(&ppconst.pp_tv[0], &error); |
| 593 | if (error) |
| 594 | { |
| 595 | clear_ppconst(&ppconst); |
| 596 | return NULL; |
| 597 | } |
| 598 | cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES; |
| 599 | clear_ppconst(&ppconst); |
| 600 | scope->se_u.se_if.is_if_label = -1; |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | // Not a constant, generate instructions for the expression. |
| 605 | cctx->ctx_skip = SKIP_UNKNOWN; |
| 606 | if (generate_ppconst(cctx, &ppconst) == FAIL) |
| 607 | return NULL; |
| 608 | if (bool_on_stack(cctx) == FAIL) |
| 609 | return NULL; |
| 610 | |
| 611 | // CMDMOD_REV must come before the jump |
| 612 | generate_undo_cmdmods(cctx); |
| 613 | |
| 614 | // "where" is set when ":elseif", "else" or ":endif" is found |
| 615 | scope->se_u.se_if.is_if_label = instr->ga_len; |
| 616 | generate_JUMP(cctx, JUMP_IF_FALSE, 0); |
| 617 | } |
| 618 | |
| 619 | return p; |
| 620 | } |
| 621 | |
| 622 | char_u * |
| 623 | compile_else(char_u *arg, cctx_T *cctx) |
| 624 | { |
| 625 | char_u *p = arg; |
| 626 | garray_T *instr = &cctx->ctx_instr; |
| 627 | isn_T *isn; |
| 628 | scope_T *scope = cctx->ctx_scope; |
| 629 | |
| 630 | if (scope == NULL || scope->se_type != IF_SCOPE) |
| 631 | { |
| 632 | emsg(_(e_else_without_if)); |
| 633 | return NULL; |
| 634 | } |
| 635 | unwind_locals(cctx, scope->se_local_count); |
| 636 | if (!cctx->ctx_had_return) |
| 637 | scope->se_u.se_if.is_had_return = FALSE; |
| 638 | scope->se_u.se_if.is_seen_else = TRUE; |
| 639 | |
| 640 | #ifdef FEAT_PROFILE |
| 641 | if (cctx->ctx_compile_type == CT_PROFILE) |
| 642 | { |
| 643 | if (cctx->ctx_skip == SKIP_NOT |
| 644 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1] |
| 645 | .isn_type == ISN_PROF_START) |
| 646 | // the previous block was executed, do not count "else" for |
| 647 | // profiling |
| 648 | --instr->ga_len; |
| 649 | if (cctx->ctx_skip == SKIP_YES && !scope->se_u.se_if.is_seen_skip_not) |
| 650 | { |
| 651 | // the previous block was not executed, this one will, do count the |
| 652 | // "else" for profiling |
| 653 | cctx->ctx_skip = SKIP_NOT; |
| 654 | generate_instr(cctx, ISN_PROF_END); |
| 655 | generate_instr(cctx, ISN_PROF_START); |
| 656 | cctx->ctx_skip = SKIP_YES; |
| 657 | } |
| 658 | } |
| 659 | #endif |
| 660 | |
| 661 | if (!scope->se_u.se_if.is_seen_skip_not && scope->se_skip_save != SKIP_YES) |
| 662 | { |
| 663 | // jump from previous block to the end, unless the else block is empty |
| 664 | if (cctx->ctx_skip == SKIP_UNKNOWN) |
| 665 | { |
| 666 | if (!cctx->ctx_had_return |
| 667 | && compile_jump_to_end(&scope->se_u.se_if.is_end_label, |
| 668 | JUMP_ALWAYS, cctx) == FAIL) |
| 669 | return NULL; |
| 670 | } |
| 671 | |
| 672 | if (cctx->ctx_skip == SKIP_UNKNOWN) |
| 673 | { |
| 674 | if (scope->se_u.se_if.is_if_label >= 0) |
| 675 | { |
| 676 | // previous "if" or "elseif" jumps here |
| 677 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label; |
| 678 | isn->isn_arg.jump.jump_where = instr->ga_len; |
| 679 | scope->se_u.se_if.is_if_label = -1; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | if (cctx->ctx_skip != SKIP_UNKNOWN) |
| 684 | cctx->ctx_skip = cctx->ctx_skip == SKIP_YES ? SKIP_NOT : SKIP_YES; |
| 685 | } |
| 686 | |
| 687 | return p; |
| 688 | } |
| 689 | |
| 690 | char_u * |
| 691 | compile_endif(char_u *arg, cctx_T *cctx) |
| 692 | { |
| 693 | scope_T *scope = cctx->ctx_scope; |
| 694 | ifscope_T *ifscope; |
| 695 | garray_T *instr = &cctx->ctx_instr; |
| 696 | isn_T *isn; |
| 697 | |
| 698 | if (misplaced_cmdmod(cctx)) |
| 699 | return NULL; |
| 700 | |
| 701 | if (scope == NULL || scope->se_type != IF_SCOPE) |
| 702 | { |
| 703 | emsg(_(e_endif_without_if)); |
| 704 | return NULL; |
| 705 | } |
| 706 | ifscope = &scope->se_u.se_if; |
| 707 | unwind_locals(cctx, scope->se_local_count); |
| 708 | if (!cctx->ctx_had_return) |
| 709 | ifscope->is_had_return = FALSE; |
| 710 | |
| 711 | if (scope->se_u.se_if.is_if_label >= 0) |
| 712 | { |
| 713 | // previous "if" or "elseif" jumps here |
| 714 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label; |
| 715 | isn->isn_arg.jump.jump_where = instr->ga_len; |
| 716 | } |
| 717 | // Fill in the "end" label in jumps at the end of the blocks. |
| 718 | compile_fill_jump_to_end(&ifscope->is_end_label, instr->ga_len, cctx); |
| 719 | |
| 720 | #ifdef FEAT_PROFILE |
| 721 | // even when skipping we count the endif as executed, unless the block it's |
| 722 | // in is skipped |
| 723 | if (cctx->ctx_compile_type == CT_PROFILE && cctx->ctx_skip == SKIP_YES |
| 724 | && scope->se_skip_save != SKIP_YES) |
| 725 | { |
| 726 | cctx->ctx_skip = SKIP_NOT; |
| 727 | generate_instr(cctx, ISN_PROF_START); |
| 728 | } |
| 729 | #endif |
| 730 | cctx->ctx_skip = scope->se_skip_save; |
| 731 | |
| 732 | // If all the blocks end in :return and there is an :else then the |
| 733 | // had_return flag is set. |
| 734 | cctx->ctx_had_return = ifscope->is_had_return && ifscope->is_seen_else; |
| 735 | |
| 736 | drop_scope(cctx); |
| 737 | return arg; |
| 738 | } |
| 739 | |
| 740 | /* |
| 741 | * Compile "for var in expr": |
| 742 | * |
| 743 | * Produces instructions: |
| 744 | * PUSHNR -1 |
| 745 | * STORE loop-idx Set index to -1 |
| 746 | * EVAL expr result of "expr" on top of stack |
| 747 | * top: FOR loop-idx, end Increment index, use list on bottom of stack |
| 748 | * - if beyond end, jump to "end" |
| 749 | * - otherwise get item from list and push it |
| 750 | * STORE var Store item in "var" |
| 751 | * ... body ... |
| 752 | * JUMP top Jump back to repeat |
| 753 | * end: DROP Drop the result of "expr" |
| 754 | * |
| 755 | * Compile "for [var1, var2] in expr" - as above, but instead of "STORE var": |
| 756 | * UNPACK 2 Split item in 2 |
| 757 | * STORE var1 Store item in "var1" |
| 758 | * STORE var2 Store item in "var2" |
| 759 | */ |
| 760 | char_u * |
| 761 | compile_for(char_u *arg_start, cctx_T *cctx) |
| 762 | { |
| 763 | char_u *arg; |
| 764 | char_u *arg_end; |
| 765 | char_u *name = NULL; |
| 766 | char_u *p; |
| 767 | char_u *wp; |
| 768 | int var_count = 0; |
| 769 | int var_list = FALSE; |
| 770 | int semicolon = FALSE; |
| 771 | size_t varlen; |
| 772 | garray_T *stack = &cctx->ctx_type_stack; |
| 773 | garray_T *instr = &cctx->ctx_instr; |
| 774 | scope_T *scope; |
| 775 | lvar_T *loop_lvar; // loop iteration variable |
| 776 | lvar_T *var_lvar; // variable for "var" |
| 777 | type_T *vartype; |
| 778 | type_T *item_type = &t_any; |
| 779 | int idx; |
| 780 | int prev_lnum = cctx->ctx_prev_lnum; |
| 781 | |
| 782 | p = skip_var_list(arg_start, TRUE, &var_count, &semicolon, FALSE); |
| 783 | if (p == NULL) |
| 784 | return NULL; |
| 785 | if (var_count == 0) |
| 786 | var_count = 1; |
| 787 | else |
| 788 | var_list = TRUE; // can also be a list of one variable |
| 789 | |
| 790 | // consume "in" |
| 791 | wp = p; |
| 792 | if (may_get_next_line_error(wp, &p, cctx) == FAIL) |
| 793 | return NULL; |
| 794 | if (STRNCMP(p, "in", 2) != 0 || !IS_WHITE_OR_NUL(p[2])) |
| 795 | { |
| 796 | if (*p == ':' && wp != p) |
| 797 | semsg(_(e_no_white_space_allowed_before_colon_str), p); |
| 798 | else |
| 799 | emsg(_(e_missing_in)); |
| 800 | return NULL; |
| 801 | } |
| 802 | wp = p + 2; |
| 803 | if (may_get_next_line_error(wp, &p, cctx) == FAIL) |
| 804 | return NULL; |
| 805 | |
| 806 | // Remove the already generated ISN_DEBUG, it is written below the ISN_FOR |
| 807 | // instruction. |
| 808 | if (cctx->ctx_compile_type == CT_DEBUG && instr->ga_len > 0 |
| 809 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1] |
| 810 | .isn_type == ISN_DEBUG) |
| 811 | { |
| 812 | --instr->ga_len; |
| 813 | prev_lnum = ((isn_T *)instr->ga_data)[instr->ga_len] |
| 814 | .isn_arg.debug.dbg_break_lnum; |
| 815 | } |
| 816 | |
| 817 | scope = new_scope(cctx, FOR_SCOPE); |
| 818 | if (scope == NULL) |
| 819 | return NULL; |
| 820 | |
| 821 | // Reserve a variable to store the loop iteration counter and initialize it |
| 822 | // to -1. |
| 823 | loop_lvar = reserve_local(cctx, (char_u *)"", 0, FALSE, &t_number); |
| 824 | if (loop_lvar == NULL) |
| 825 | { |
| 826 | // out of memory |
| 827 | drop_scope(cctx); |
| 828 | return NULL; |
| 829 | } |
| 830 | generate_STORENR(cctx, loop_lvar->lv_idx, -1); |
| 831 | |
| 832 | // compile "expr", it remains on the stack until "endfor" |
| 833 | arg = p; |
| 834 | if (compile_expr0(&arg, cctx) == FAIL) |
| 835 | { |
| 836 | drop_scope(cctx); |
| 837 | return NULL; |
| 838 | } |
| 839 | arg_end = arg; |
| 840 | |
| 841 | if (cctx->ctx_skip != SKIP_YES) |
| 842 | { |
Dominique Pelle | af4a61a | 2021-12-27 17:21:41 +0000 | [diff] [blame] | 843 | // If we know the type of "var" and it is not a supported type we can |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 844 | // give an error now. |
| 845 | vartype = ((type_T **)stack->ga_data)[stack->ga_len - 1]; |
Bram Moolenaar | 59618fe | 2021-12-21 12:32:17 +0000 | [diff] [blame] | 846 | if (vartype->tt_type != VAR_LIST |
| 847 | && vartype->tt_type != VAR_STRING |
| 848 | && vartype->tt_type != VAR_BLOB |
| 849 | && vartype->tt_type != VAR_ANY |
| 850 | && vartype->tt_type != VAR_UNKNOWN) |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 851 | { |
| 852 | semsg(_(e_for_loop_on_str_not_supported), |
| 853 | vartype_name(vartype->tt_type)); |
| 854 | drop_scope(cctx); |
| 855 | return NULL; |
| 856 | } |
| 857 | |
| 858 | if (vartype->tt_type == VAR_STRING) |
| 859 | item_type = &t_string; |
| 860 | else if (vartype->tt_type == VAR_BLOB) |
| 861 | item_type = &t_number; |
| 862 | else if (vartype->tt_type == VAR_LIST |
| 863 | && vartype->tt_member->tt_type != VAR_ANY) |
| 864 | { |
| 865 | if (!var_list) |
| 866 | item_type = vartype->tt_member; |
| 867 | else if (vartype->tt_member->tt_type == VAR_LIST |
| 868 | && vartype->tt_member->tt_member->tt_type != VAR_ANY) |
| 869 | item_type = vartype->tt_member->tt_member; |
| 870 | } |
| 871 | |
| 872 | // CMDMOD_REV must come before the FOR instruction. |
| 873 | generate_undo_cmdmods(cctx); |
| 874 | |
| 875 | // "for_end" is set when ":endfor" is found |
| 876 | scope->se_u.se_for.fs_top_label = current_instr_idx(cctx); |
| 877 | |
| 878 | generate_FOR(cctx, loop_lvar->lv_idx); |
| 879 | |
| 880 | arg = arg_start; |
| 881 | if (var_list) |
| 882 | { |
| 883 | generate_UNPACK(cctx, var_count, semicolon); |
| 884 | arg = skipwhite(arg + 1); // skip white after '[' |
| 885 | |
| 886 | // the list item is replaced by a number of items |
| 887 | if (GA_GROW_FAILS(stack, var_count - 1)) |
| 888 | { |
| 889 | drop_scope(cctx); |
| 890 | return NULL; |
| 891 | } |
| 892 | --stack->ga_len; |
| 893 | for (idx = 0; idx < var_count; ++idx) |
| 894 | { |
| 895 | ((type_T **)stack->ga_data)[stack->ga_len] = |
| 896 | (semicolon && idx == 0) ? vartype : item_type; |
| 897 | ++stack->ga_len; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | for (idx = 0; idx < var_count; ++idx) |
| 902 | { |
| 903 | assign_dest_T dest = dest_local; |
| 904 | int opt_flags = 0; |
| 905 | int vimvaridx = -1; |
| 906 | type_T *type = &t_any; |
| 907 | type_T *lhs_type = &t_any; |
| 908 | where_T where = WHERE_INIT; |
| 909 | |
| 910 | p = skip_var_one(arg, FALSE); |
| 911 | varlen = p - arg; |
| 912 | name = vim_strnsave(arg, varlen); |
| 913 | if (name == NULL) |
| 914 | goto failed; |
| 915 | if (*p == ':') |
| 916 | { |
| 917 | p = skipwhite(p + 1); |
| 918 | lhs_type = parse_type(&p, cctx->ctx_type_list, TRUE); |
| 919 | } |
| 920 | |
| 921 | if (get_var_dest(name, &dest, CMD_for, &opt_flags, |
| 922 | &vimvaridx, &type, cctx) == FAIL) |
| 923 | goto failed; |
| 924 | if (dest != dest_local) |
| 925 | { |
| 926 | if (generate_store_var(cctx, dest, opt_flags, vimvaridx, |
| 927 | 0, 0, type, name) == FAIL) |
| 928 | goto failed; |
| 929 | } |
| 930 | else if (varlen == 1 && *arg == '_') |
| 931 | { |
| 932 | // Assigning to "_": drop the value. |
| 933 | if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL) |
| 934 | goto failed; |
| 935 | } |
| 936 | else |
| 937 | { |
| 938 | // Script var is not supported. |
| 939 | if (STRNCMP(name, "s:", 2) == 0) |
| 940 | { |
| 941 | emsg(_(e_cannot_use_script_variable_in_for_loop)); |
| 942 | goto failed; |
| 943 | } |
| 944 | |
| 945 | if (!valid_varname(arg, (int)varlen, FALSE)) |
| 946 | goto failed; |
| 947 | if (lookup_local(arg, varlen, NULL, cctx) == OK) |
| 948 | { |
| 949 | semsg(_(e_variable_already_declared), arg); |
| 950 | goto failed; |
| 951 | } |
| 952 | |
| 953 | // Reserve a variable to store "var". |
| 954 | where.wt_index = var_list ? idx + 1 : 0; |
| 955 | where.wt_variable = TRUE; |
| 956 | if (lhs_type == &t_any) |
| 957 | lhs_type = item_type; |
| 958 | else if (item_type != &t_unknown |
| 959 | && (item_type == &t_any |
| 960 | ? need_type(item_type, lhs_type, |
| 961 | -1, 0, cctx, FALSE, FALSE) |
| 962 | : check_type(lhs_type, item_type, TRUE, where)) |
| 963 | == FAIL) |
| 964 | goto failed; |
| 965 | var_lvar = reserve_local(cctx, arg, varlen, TRUE, lhs_type); |
| 966 | if (var_lvar == NULL) |
| 967 | // out of memory or used as an argument |
| 968 | goto failed; |
| 969 | |
| 970 | if (semicolon && idx == var_count - 1) |
| 971 | var_lvar->lv_type = vartype; |
| 972 | else |
| 973 | var_lvar->lv_type = item_type; |
| 974 | generate_STORE(cctx, ISN_STORE, var_lvar->lv_idx, NULL); |
| 975 | } |
| 976 | |
| 977 | if (*p == ',' || *p == ';') |
| 978 | ++p; |
| 979 | arg = skipwhite(p); |
| 980 | vim_free(name); |
| 981 | } |
| 982 | |
| 983 | if (cctx->ctx_compile_type == CT_DEBUG) |
| 984 | { |
| 985 | int save_prev_lnum = cctx->ctx_prev_lnum; |
| 986 | |
| 987 | // Add ISN_DEBUG here, so that the loop variables can be inspected. |
| 988 | // Use the prev_lnum from the ISN_DEBUG instruction removed above. |
| 989 | cctx->ctx_prev_lnum = prev_lnum; |
| 990 | generate_instr_debug(cctx); |
| 991 | cctx->ctx_prev_lnum = save_prev_lnum; |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | return arg_end; |
| 996 | |
| 997 | failed: |
| 998 | vim_free(name); |
| 999 | drop_scope(cctx); |
| 1000 | return NULL; |
| 1001 | } |
| 1002 | |
| 1003 | /* |
| 1004 | * compile "endfor" |
| 1005 | */ |
| 1006 | char_u * |
| 1007 | compile_endfor(char_u *arg, cctx_T *cctx) |
| 1008 | { |
| 1009 | garray_T *instr = &cctx->ctx_instr; |
| 1010 | scope_T *scope = cctx->ctx_scope; |
| 1011 | forscope_T *forscope; |
| 1012 | isn_T *isn; |
| 1013 | |
| 1014 | if (misplaced_cmdmod(cctx)) |
| 1015 | return NULL; |
| 1016 | |
| 1017 | if (scope == NULL || scope->se_type != FOR_SCOPE) |
| 1018 | { |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1019 | emsg(_(e_endfor_without_for)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1020 | return NULL; |
| 1021 | } |
| 1022 | forscope = &scope->se_u.se_for; |
| 1023 | cctx->ctx_scope = scope->se_outer; |
| 1024 | if (cctx->ctx_skip != SKIP_YES) |
| 1025 | { |
| 1026 | unwind_locals(cctx, scope->se_local_count); |
| 1027 | |
| 1028 | // At end of ":for" scope jump back to the FOR instruction. |
| 1029 | generate_JUMP(cctx, JUMP_ALWAYS, forscope->fs_top_label); |
| 1030 | |
| 1031 | // Fill in the "end" label in the FOR statement so it can jump here. |
| 1032 | isn = ((isn_T *)instr->ga_data) + forscope->fs_top_label; |
| 1033 | isn->isn_arg.forloop.for_end = instr->ga_len; |
| 1034 | |
| 1035 | // Fill in the "end" label any BREAK statements |
| 1036 | compile_fill_jump_to_end(&forscope->fs_end_label, instr->ga_len, cctx); |
| 1037 | |
| 1038 | // Below the ":for" scope drop the "expr" list from the stack. |
| 1039 | if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL) |
| 1040 | return NULL; |
| 1041 | } |
| 1042 | |
| 1043 | vim_free(scope); |
| 1044 | |
| 1045 | return arg; |
| 1046 | } |
| 1047 | |
| 1048 | /* |
| 1049 | * compile "while expr" |
| 1050 | * |
| 1051 | * Produces instructions: |
| 1052 | * top: EVAL expr Push result of "expr" |
| 1053 | * JUMP_IF_FALSE end jump if false |
| 1054 | * ... body ... |
| 1055 | * JUMP top Jump back to repeat |
| 1056 | * end: |
| 1057 | * |
| 1058 | */ |
| 1059 | char_u * |
| 1060 | compile_while(char_u *arg, cctx_T *cctx) |
| 1061 | { |
| 1062 | char_u *p = arg; |
| 1063 | scope_T *scope; |
| 1064 | |
| 1065 | scope = new_scope(cctx, WHILE_SCOPE); |
| 1066 | if (scope == NULL) |
| 1067 | return NULL; |
| 1068 | |
| 1069 | // "endwhile" jumps back here, one before when profiling or using cmdmods |
| 1070 | scope->se_u.se_while.ws_top_label = current_instr_idx(cctx); |
| 1071 | |
| 1072 | // compile "expr" |
| 1073 | if (compile_expr0(&p, cctx) == FAIL) |
| 1074 | return NULL; |
| 1075 | |
| 1076 | if (!ends_excmd2(arg, skipwhite(p))) |
| 1077 | { |
Bram Moolenaar | 74409f6 | 2022-01-01 15:58:22 +0000 | [diff] [blame] | 1078 | semsg(_(e_trailing_characters_str), p); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1079 | return NULL; |
| 1080 | } |
| 1081 | |
| 1082 | if (cctx->ctx_skip != SKIP_YES) |
| 1083 | { |
| 1084 | if (bool_on_stack(cctx) == FAIL) |
| 1085 | return FAIL; |
| 1086 | |
| 1087 | // CMDMOD_REV must come before the jump |
| 1088 | generate_undo_cmdmods(cctx); |
| 1089 | |
| 1090 | // "while_end" is set when ":endwhile" is found |
| 1091 | if (compile_jump_to_end(&scope->se_u.se_while.ws_end_label, |
| 1092 | JUMP_IF_FALSE, cctx) == FAIL) |
| 1093 | return FAIL; |
| 1094 | } |
| 1095 | |
| 1096 | return p; |
| 1097 | } |
| 1098 | |
| 1099 | /* |
| 1100 | * compile "endwhile" |
| 1101 | */ |
| 1102 | char_u * |
| 1103 | compile_endwhile(char_u *arg, cctx_T *cctx) |
| 1104 | { |
| 1105 | scope_T *scope = cctx->ctx_scope; |
| 1106 | garray_T *instr = &cctx->ctx_instr; |
| 1107 | |
| 1108 | if (misplaced_cmdmod(cctx)) |
| 1109 | return NULL; |
| 1110 | if (scope == NULL || scope->se_type != WHILE_SCOPE) |
| 1111 | { |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1112 | emsg(_(e_endwhile_without_while)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1113 | return NULL; |
| 1114 | } |
| 1115 | cctx->ctx_scope = scope->se_outer; |
| 1116 | if (cctx->ctx_skip != SKIP_YES) |
| 1117 | { |
| 1118 | unwind_locals(cctx, scope->se_local_count); |
| 1119 | |
| 1120 | #ifdef FEAT_PROFILE |
| 1121 | // count the endwhile before jumping |
| 1122 | may_generate_prof_end(cctx, cctx->ctx_lnum); |
| 1123 | #endif |
| 1124 | |
| 1125 | // At end of ":for" scope jump back to the FOR instruction. |
| 1126 | generate_JUMP(cctx, JUMP_ALWAYS, scope->se_u.se_while.ws_top_label); |
| 1127 | |
| 1128 | // Fill in the "end" label in the WHILE statement so it can jump here. |
| 1129 | // And in any jumps for ":break" |
| 1130 | compile_fill_jump_to_end(&scope->se_u.se_while.ws_end_label, |
| 1131 | instr->ga_len, cctx); |
| 1132 | } |
| 1133 | |
| 1134 | vim_free(scope); |
| 1135 | |
| 1136 | return arg; |
| 1137 | } |
| 1138 | |
| 1139 | /* |
| 1140 | * compile "continue" |
| 1141 | */ |
| 1142 | char_u * |
| 1143 | compile_continue(char_u *arg, cctx_T *cctx) |
| 1144 | { |
| 1145 | scope_T *scope = cctx->ctx_scope; |
| 1146 | int try_scopes = 0; |
| 1147 | int loop_label; |
| 1148 | |
| 1149 | for (;;) |
| 1150 | { |
| 1151 | if (scope == NULL) |
| 1152 | { |
| 1153 | emsg(_(e_continue)); |
| 1154 | return NULL; |
| 1155 | } |
| 1156 | if (scope->se_type == FOR_SCOPE) |
| 1157 | { |
| 1158 | loop_label = scope->se_u.se_for.fs_top_label; |
| 1159 | break; |
| 1160 | } |
| 1161 | if (scope->se_type == WHILE_SCOPE) |
| 1162 | { |
| 1163 | loop_label = scope->se_u.se_while.ws_top_label; |
| 1164 | break; |
| 1165 | } |
| 1166 | if (scope->se_type == TRY_SCOPE) |
| 1167 | ++try_scopes; |
| 1168 | scope = scope->se_outer; |
| 1169 | } |
| 1170 | |
| 1171 | if (try_scopes > 0) |
| 1172 | // Inside one or more try/catch blocks we first need to jump to the |
| 1173 | // "finally" or "endtry" to cleanup. |
| 1174 | generate_TRYCONT(cctx, try_scopes, loop_label); |
| 1175 | else |
| 1176 | // Jump back to the FOR or WHILE instruction. |
| 1177 | generate_JUMP(cctx, JUMP_ALWAYS, loop_label); |
| 1178 | |
| 1179 | return arg; |
| 1180 | } |
| 1181 | |
| 1182 | /* |
| 1183 | * compile "break" |
| 1184 | */ |
| 1185 | char_u * |
| 1186 | compile_break(char_u *arg, cctx_T *cctx) |
| 1187 | { |
| 1188 | scope_T *scope = cctx->ctx_scope; |
| 1189 | endlabel_T **el; |
| 1190 | |
| 1191 | for (;;) |
| 1192 | { |
| 1193 | if (scope == NULL) |
| 1194 | { |
| 1195 | emsg(_(e_break)); |
| 1196 | return NULL; |
| 1197 | } |
| 1198 | if (scope->se_type == FOR_SCOPE || scope->se_type == WHILE_SCOPE) |
| 1199 | break; |
| 1200 | scope = scope->se_outer; |
| 1201 | } |
| 1202 | |
| 1203 | // Jump to the end of the FOR or WHILE loop. |
| 1204 | if (scope->se_type == FOR_SCOPE) |
| 1205 | el = &scope->se_u.se_for.fs_end_label; |
| 1206 | else |
| 1207 | el = &scope->se_u.se_while.ws_end_label; |
| 1208 | if (compile_jump_to_end(el, JUMP_ALWAYS, cctx) == FAIL) |
| 1209 | return FAIL; |
| 1210 | |
| 1211 | return arg; |
| 1212 | } |
| 1213 | |
| 1214 | /* |
| 1215 | * compile "{" start of block |
| 1216 | */ |
| 1217 | char_u * |
| 1218 | compile_block(char_u *arg, cctx_T *cctx) |
| 1219 | { |
| 1220 | if (new_scope(cctx, BLOCK_SCOPE) == NULL) |
| 1221 | return NULL; |
| 1222 | return skipwhite(arg + 1); |
| 1223 | } |
| 1224 | |
| 1225 | /* |
| 1226 | * compile end of block: drop one scope |
| 1227 | */ |
| 1228 | void |
| 1229 | compile_endblock(cctx_T *cctx) |
| 1230 | { |
| 1231 | scope_T *scope = cctx->ctx_scope; |
| 1232 | |
| 1233 | cctx->ctx_scope = scope->se_outer; |
| 1234 | unwind_locals(cctx, scope->se_local_count); |
| 1235 | vim_free(scope); |
| 1236 | } |
| 1237 | |
| 1238 | /* |
| 1239 | * Compile "try". |
| 1240 | * Creates a new scope for the try-endtry, pointing to the first catch and |
| 1241 | * finally. |
| 1242 | * Creates another scope for the "try" block itself. |
| 1243 | * TRY instruction sets up exception handling at runtime. |
| 1244 | * |
| 1245 | * "try" |
| 1246 | * TRY -> catch1, -> finally push trystack entry |
| 1247 | * ... try block |
| 1248 | * "throw {exception}" |
| 1249 | * EVAL {exception} |
| 1250 | * THROW create exception |
| 1251 | * ... try block |
| 1252 | * " catch {expr}" |
| 1253 | * JUMP -> finally |
| 1254 | * catch1: PUSH exception |
| 1255 | * EVAL {expr} |
| 1256 | * MATCH |
| 1257 | * JUMP nomatch -> catch2 |
| 1258 | * CATCH remove exception |
| 1259 | * ... catch block |
| 1260 | * " catch" |
| 1261 | * JUMP -> finally |
| 1262 | * catch2: CATCH remove exception |
| 1263 | * ... catch block |
| 1264 | * " finally" |
| 1265 | * finally: |
| 1266 | * ... finally block |
| 1267 | * " endtry" |
| 1268 | * ENDTRY pop trystack entry, may rethrow |
| 1269 | */ |
| 1270 | char_u * |
| 1271 | compile_try(char_u *arg, cctx_T *cctx) |
| 1272 | { |
| 1273 | garray_T *instr = &cctx->ctx_instr; |
| 1274 | scope_T *try_scope; |
| 1275 | scope_T *scope; |
| 1276 | |
| 1277 | if (misplaced_cmdmod(cctx)) |
| 1278 | return NULL; |
| 1279 | |
| 1280 | // scope that holds the jumps that go to catch/finally/endtry |
| 1281 | try_scope = new_scope(cctx, TRY_SCOPE); |
| 1282 | if (try_scope == NULL) |
| 1283 | return NULL; |
| 1284 | |
| 1285 | if (cctx->ctx_skip != SKIP_YES) |
| 1286 | { |
| 1287 | isn_T *isn; |
| 1288 | |
| 1289 | // "try_catch" is set when the first ":catch" is found or when no catch |
| 1290 | // is found and ":finally" is found. |
| 1291 | // "try_finally" is set when ":finally" is found |
| 1292 | // "try_endtry" is set when ":endtry" is found |
| 1293 | try_scope->se_u.se_try.ts_try_label = instr->ga_len; |
| 1294 | if ((isn = generate_instr(cctx, ISN_TRY)) == NULL) |
| 1295 | return NULL; |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1296 | isn->isn_arg.tryref.try_ref = ALLOC_CLEAR_ONE(tryref_T); |
| 1297 | if (isn->isn_arg.tryref.try_ref == NULL) |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1298 | return NULL; |
| 1299 | } |
| 1300 | |
| 1301 | // scope for the try block itself |
| 1302 | scope = new_scope(cctx, BLOCK_SCOPE); |
| 1303 | if (scope == NULL) |
| 1304 | return NULL; |
| 1305 | |
| 1306 | return arg; |
| 1307 | } |
| 1308 | |
| 1309 | /* |
| 1310 | * Compile "catch {expr}". |
| 1311 | */ |
| 1312 | char_u * |
| 1313 | compile_catch(char_u *arg, cctx_T *cctx UNUSED) |
| 1314 | { |
| 1315 | scope_T *scope = cctx->ctx_scope; |
| 1316 | garray_T *instr = &cctx->ctx_instr; |
| 1317 | char_u *p; |
| 1318 | isn_T *isn; |
| 1319 | |
| 1320 | if (misplaced_cmdmod(cctx)) |
| 1321 | return NULL; |
| 1322 | |
| 1323 | // end block scope from :try or :catch |
| 1324 | if (scope != NULL && scope->se_type == BLOCK_SCOPE) |
| 1325 | compile_endblock(cctx); |
| 1326 | scope = cctx->ctx_scope; |
| 1327 | |
| 1328 | // Error if not in a :try scope |
| 1329 | if (scope == NULL || scope->se_type != TRY_SCOPE) |
| 1330 | { |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1331 | emsg(_(e_catch_without_try)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1332 | return NULL; |
| 1333 | } |
| 1334 | |
| 1335 | if (scope->se_u.se_try.ts_caught_all) |
| 1336 | { |
| 1337 | emsg(_(e_catch_unreachable_after_catch_all)); |
| 1338 | return NULL; |
| 1339 | } |
| 1340 | |
| 1341 | if (cctx->ctx_skip != SKIP_YES) |
| 1342 | { |
| 1343 | #ifdef FEAT_PROFILE |
| 1344 | // the profile-start should be after the jump |
| 1345 | if (cctx->ctx_compile_type == CT_PROFILE |
| 1346 | && instr->ga_len > 0 |
| 1347 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1] |
| 1348 | .isn_type == ISN_PROF_START) |
| 1349 | --instr->ga_len; |
| 1350 | #endif |
| 1351 | // Jump from end of previous block to :finally or :endtry |
| 1352 | if (compile_jump_to_end(&scope->se_u.se_try.ts_end_label, |
| 1353 | JUMP_ALWAYS, cctx) == FAIL) |
| 1354 | return NULL; |
| 1355 | |
| 1356 | // End :try or :catch scope: set value in ISN_TRY instruction |
| 1357 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label; |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1358 | if (isn->isn_arg.tryref.try_ref->try_catch == 0) |
| 1359 | isn->isn_arg.tryref.try_ref->try_catch = instr->ga_len; |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1360 | if (scope->se_u.se_try.ts_catch_label != 0) |
| 1361 | { |
| 1362 | // Previous catch without match jumps here |
| 1363 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_catch_label; |
| 1364 | isn->isn_arg.jump.jump_where = instr->ga_len; |
| 1365 | } |
| 1366 | #ifdef FEAT_PROFILE |
| 1367 | if (cctx->ctx_compile_type == CT_PROFILE) |
| 1368 | { |
| 1369 | // a "throw" that jumps here needs to be counted |
| 1370 | generate_instr(cctx, ISN_PROF_END); |
| 1371 | // the "catch" is also counted |
| 1372 | generate_instr(cctx, ISN_PROF_START); |
| 1373 | } |
| 1374 | #endif |
| 1375 | if (cctx->ctx_compile_type == CT_DEBUG) |
| 1376 | generate_instr_debug(cctx); |
| 1377 | } |
| 1378 | |
| 1379 | p = skipwhite(arg); |
| 1380 | if (ends_excmd2(arg, p)) |
| 1381 | { |
| 1382 | scope->se_u.se_try.ts_caught_all = TRUE; |
| 1383 | scope->se_u.se_try.ts_catch_label = 0; |
| 1384 | } |
| 1385 | else |
| 1386 | { |
| 1387 | char_u *end; |
| 1388 | char_u *pat; |
| 1389 | char_u *tofree = NULL; |
| 1390 | int dropped = 0; |
| 1391 | int len; |
| 1392 | |
| 1393 | // Push v:exception, push {expr} and MATCH |
| 1394 | generate_instr_type(cctx, ISN_PUSHEXC, &t_string); |
| 1395 | |
| 1396 | end = skip_regexp_ex(p + 1, *p, TRUE, &tofree, &dropped, NULL); |
| 1397 | if (*end != *p) |
| 1398 | { |
| 1399 | semsg(_(e_separator_mismatch_str), p); |
| 1400 | vim_free(tofree); |
| 1401 | return FAIL; |
| 1402 | } |
| 1403 | if (tofree == NULL) |
| 1404 | len = (int)(end - (p + 1)); |
| 1405 | else |
| 1406 | len = (int)(end - tofree); |
| 1407 | pat = vim_strnsave(tofree == NULL ? p + 1 : tofree, len); |
| 1408 | vim_free(tofree); |
| 1409 | p += len + 2 + dropped; |
| 1410 | if (pat == NULL) |
| 1411 | return FAIL; |
| 1412 | if (generate_PUSHS(cctx, &pat) == FAIL) |
| 1413 | return FAIL; |
| 1414 | |
| 1415 | if (generate_COMPARE(cctx, EXPR_MATCH, FALSE) == FAIL) |
| 1416 | return NULL; |
| 1417 | |
| 1418 | scope->se_u.se_try.ts_catch_label = instr->ga_len; |
| 1419 | if (generate_JUMP(cctx, JUMP_IF_FALSE, 0) == FAIL) |
| 1420 | return NULL; |
| 1421 | } |
| 1422 | |
| 1423 | if (cctx->ctx_skip != SKIP_YES && generate_instr(cctx, ISN_CATCH) == NULL) |
| 1424 | return NULL; |
| 1425 | |
| 1426 | if (new_scope(cctx, BLOCK_SCOPE) == NULL) |
| 1427 | return NULL; |
| 1428 | return p; |
| 1429 | } |
| 1430 | |
| 1431 | char_u * |
| 1432 | compile_finally(char_u *arg, cctx_T *cctx) |
| 1433 | { |
| 1434 | scope_T *scope = cctx->ctx_scope; |
| 1435 | garray_T *instr = &cctx->ctx_instr; |
| 1436 | isn_T *isn; |
| 1437 | int this_instr; |
| 1438 | |
| 1439 | if (misplaced_cmdmod(cctx)) |
| 1440 | return NULL; |
| 1441 | |
| 1442 | // end block scope from :try or :catch |
| 1443 | if (scope != NULL && scope->se_type == BLOCK_SCOPE) |
| 1444 | compile_endblock(cctx); |
| 1445 | scope = cctx->ctx_scope; |
| 1446 | |
| 1447 | // Error if not in a :try scope |
| 1448 | if (scope == NULL || scope->se_type != TRY_SCOPE) |
| 1449 | { |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1450 | emsg(_(e_finally_without_try)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1451 | return NULL; |
| 1452 | } |
| 1453 | |
| 1454 | if (cctx->ctx_skip != SKIP_YES) |
| 1455 | { |
| 1456 | // End :catch or :finally scope: set value in ISN_TRY instruction |
| 1457 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label; |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1458 | if (isn->isn_arg.tryref.try_ref->try_finally != 0) |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1459 | { |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1460 | emsg(_(e_multiple_finally)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1461 | return NULL; |
| 1462 | } |
| 1463 | |
| 1464 | this_instr = instr->ga_len; |
| 1465 | #ifdef FEAT_PROFILE |
| 1466 | if (cctx->ctx_compile_type == CT_PROFILE |
| 1467 | && ((isn_T *)instr->ga_data)[this_instr - 1] |
| 1468 | .isn_type == ISN_PROF_START) |
| 1469 | { |
| 1470 | // jump to the profile start of the "finally" |
| 1471 | --this_instr; |
| 1472 | |
| 1473 | // jump to the profile end above it |
| 1474 | if (this_instr > 0 && ((isn_T *)instr->ga_data)[this_instr - 1] |
| 1475 | .isn_type == ISN_PROF_END) |
| 1476 | --this_instr; |
| 1477 | } |
| 1478 | #endif |
| 1479 | |
| 1480 | // Fill in the "end" label in jumps at the end of the blocks. |
| 1481 | compile_fill_jump_to_end(&scope->se_u.se_try.ts_end_label, |
| 1482 | this_instr, cctx); |
| 1483 | |
| 1484 | // If there is no :catch then an exception jumps to :finally. |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1485 | if (isn->isn_arg.tryref.try_ref->try_catch == 0) |
| 1486 | isn->isn_arg.tryref.try_ref->try_catch = this_instr; |
| 1487 | isn->isn_arg.tryref.try_ref->try_finally = this_instr; |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1488 | if (scope->se_u.se_try.ts_catch_label != 0) |
| 1489 | { |
| 1490 | // Previous catch without match jumps here |
| 1491 | isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_catch_label; |
| 1492 | isn->isn_arg.jump.jump_where = this_instr; |
| 1493 | scope->se_u.se_try.ts_catch_label = 0; |
| 1494 | } |
| 1495 | if (generate_instr(cctx, ISN_FINALLY) == NULL) |
| 1496 | return NULL; |
| 1497 | } |
| 1498 | |
| 1499 | return arg; |
| 1500 | } |
| 1501 | |
| 1502 | char_u * |
| 1503 | compile_endtry(char_u *arg, cctx_T *cctx) |
| 1504 | { |
| 1505 | scope_T *scope = cctx->ctx_scope; |
| 1506 | garray_T *instr = &cctx->ctx_instr; |
| 1507 | isn_T *try_isn; |
| 1508 | |
| 1509 | if (misplaced_cmdmod(cctx)) |
| 1510 | return NULL; |
| 1511 | |
| 1512 | // end block scope from :catch or :finally |
| 1513 | if (scope != NULL && scope->se_type == BLOCK_SCOPE) |
| 1514 | compile_endblock(cctx); |
| 1515 | scope = cctx->ctx_scope; |
| 1516 | |
| 1517 | // Error if not in a :try scope |
| 1518 | if (scope == NULL || scope->se_type != TRY_SCOPE) |
| 1519 | { |
| 1520 | if (scope == NULL) |
Bram Moolenaar | 436b5ad | 2021-12-31 22:49:24 +0000 | [diff] [blame] | 1521 | emsg(_(e_endtry_without_try)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1522 | else if (scope->se_type == WHILE_SCOPE) |
Bram Moolenaar | 1a99222 | 2021-12-31 17:25:48 +0000 | [diff] [blame] | 1523 | emsg(_(e_missing_endwhile)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1524 | else if (scope->se_type == FOR_SCOPE) |
Bram Moolenaar | 1a99222 | 2021-12-31 17:25:48 +0000 | [diff] [blame] | 1525 | emsg(_(e_missing_endfor)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1526 | else |
Bram Moolenaar | 1a99222 | 2021-12-31 17:25:48 +0000 | [diff] [blame] | 1527 | emsg(_(e_missing_endif)); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1528 | return NULL; |
| 1529 | } |
| 1530 | |
| 1531 | try_isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label; |
| 1532 | if (cctx->ctx_skip != SKIP_YES) |
| 1533 | { |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1534 | if (try_isn->isn_arg.tryref.try_ref->try_catch == 0 |
| 1535 | && try_isn->isn_arg.tryref.try_ref->try_finally == 0) |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1536 | { |
| 1537 | emsg(_(e_missing_catch_or_finally)); |
| 1538 | return NULL; |
| 1539 | } |
| 1540 | |
| 1541 | #ifdef FEAT_PROFILE |
| 1542 | if (cctx->ctx_compile_type == CT_PROFILE |
| 1543 | && ((isn_T *)instr->ga_data)[instr->ga_len - 1] |
| 1544 | .isn_type == ISN_PROF_START) |
| 1545 | // move the profile start after "endtry" so that it's not counted when |
| 1546 | // the exception is rethrown. |
| 1547 | --instr->ga_len; |
| 1548 | #endif |
| 1549 | |
| 1550 | // Fill in the "end" label in jumps at the end of the blocks, if not |
| 1551 | // done by ":finally". |
| 1552 | compile_fill_jump_to_end(&scope->se_u.se_try.ts_end_label, |
| 1553 | instr->ga_len, cctx); |
| 1554 | |
| 1555 | if (scope->se_u.se_try.ts_catch_label != 0) |
| 1556 | { |
| 1557 | // Last catch without match jumps here |
| 1558 | isn_T *isn = ((isn_T *)instr->ga_data) |
| 1559 | + scope->se_u.se_try.ts_catch_label; |
| 1560 | isn->isn_arg.jump.jump_where = instr->ga_len; |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | compile_endblock(cctx); |
| 1565 | |
| 1566 | if (cctx->ctx_skip != SKIP_YES) |
| 1567 | { |
| 1568 | // End :catch or :finally scope: set instruction index in ISN_TRY |
| 1569 | // instruction |
Bram Moolenaar | 0d80710 | 2021-12-21 09:42:09 +0000 | [diff] [blame] | 1570 | try_isn->isn_arg.tryref.try_ref->try_endtry = instr->ga_len; |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 1571 | if (cctx->ctx_skip != SKIP_YES |
| 1572 | && generate_instr(cctx, ISN_ENDTRY) == NULL) |
| 1573 | return NULL; |
| 1574 | #ifdef FEAT_PROFILE |
| 1575 | if (cctx->ctx_compile_type == CT_PROFILE) |
| 1576 | generate_instr(cctx, ISN_PROF_START); |
| 1577 | #endif |
| 1578 | } |
| 1579 | return arg; |
| 1580 | } |
| 1581 | |
| 1582 | /* |
| 1583 | * compile "throw {expr}" |
| 1584 | */ |
| 1585 | char_u * |
| 1586 | compile_throw(char_u *arg, cctx_T *cctx UNUSED) |
| 1587 | { |
| 1588 | char_u *p = skipwhite(arg); |
| 1589 | |
| 1590 | if (compile_expr0(&p, cctx) == FAIL) |
| 1591 | return NULL; |
| 1592 | if (cctx->ctx_skip == SKIP_YES) |
| 1593 | return p; |
| 1594 | if (may_generate_2STRING(-1, FALSE, cctx) == FAIL) |
| 1595 | return NULL; |
| 1596 | if (generate_instr_drop(cctx, ISN_THROW, 1) == NULL) |
| 1597 | return NULL; |
| 1598 | |
| 1599 | return p; |
| 1600 | } |
| 1601 | |
| 1602 | char_u * |
| 1603 | compile_eval(char_u *arg, cctx_T *cctx) |
| 1604 | { |
| 1605 | char_u *p = arg; |
| 1606 | int name_only; |
| 1607 | long lnum = SOURCING_LNUM; |
| 1608 | |
| 1609 | // find_ex_command() will consider a variable name an expression, assuming |
| 1610 | // that something follows on the next line. Check that something actually |
| 1611 | // follows, otherwise it's probably a misplaced command. |
| 1612 | name_only = cmd_is_name_only(arg); |
| 1613 | |
| 1614 | if (compile_expr0(&p, cctx) == FAIL) |
| 1615 | return NULL; |
| 1616 | |
| 1617 | if (name_only && lnum == SOURCING_LNUM) |
| 1618 | { |
| 1619 | semsg(_(e_expression_without_effect_str), arg); |
| 1620 | return NULL; |
| 1621 | } |
| 1622 | |
| 1623 | // drop the result |
| 1624 | generate_instr_drop(cctx, ISN_DROP, 1); |
| 1625 | |
| 1626 | return skipwhite(p); |
| 1627 | } |
| 1628 | |
| 1629 | /* |
| 1630 | * compile "echo expr" |
| 1631 | * compile "echomsg expr" |
| 1632 | * compile "echoerr expr" |
| 1633 | * compile "echoconsole expr" |
| 1634 | * compile "execute expr" |
| 1635 | */ |
| 1636 | char_u * |
| 1637 | compile_mult_expr(char_u *arg, int cmdidx, cctx_T *cctx) |
| 1638 | { |
| 1639 | char_u *p = arg; |
| 1640 | char_u *prev = arg; |
| 1641 | char_u *expr_start; |
| 1642 | int count = 0; |
| 1643 | int start_ctx_lnum = cctx->ctx_lnum; |
| 1644 | garray_T *stack = &cctx->ctx_type_stack; |
| 1645 | type_T *type; |
| 1646 | |
| 1647 | for (;;) |
| 1648 | { |
| 1649 | if (ends_excmd2(prev, p)) |
| 1650 | break; |
| 1651 | expr_start = p; |
| 1652 | if (compile_expr0(&p, cctx) == FAIL) |
| 1653 | return NULL; |
| 1654 | |
| 1655 | if (cctx->ctx_skip != SKIP_YES) |
| 1656 | { |
| 1657 | // check for non-void type |
| 1658 | type = ((type_T **)stack->ga_data)[stack->ga_len - 1]; |
| 1659 | if (type->tt_type == VAR_VOID) |
| 1660 | { |
| 1661 | semsg(_(e_expression_does_not_result_in_value_str), expr_start); |
| 1662 | return NULL; |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | ++count; |
| 1667 | prev = p; |
| 1668 | p = skipwhite(p); |
| 1669 | } |
| 1670 | |
| 1671 | if (count > 0) |
| 1672 | { |
| 1673 | long save_lnum = cctx->ctx_lnum; |
| 1674 | |
| 1675 | // Use the line number where the command started. |
| 1676 | cctx->ctx_lnum = start_ctx_lnum; |
| 1677 | |
| 1678 | if (cmdidx == CMD_echo || cmdidx == CMD_echon) |
| 1679 | generate_ECHO(cctx, cmdidx == CMD_echo, count); |
| 1680 | else if (cmdidx == CMD_execute) |
| 1681 | generate_MULT_EXPR(cctx, ISN_EXECUTE, count); |
| 1682 | else if (cmdidx == CMD_echomsg) |
| 1683 | generate_MULT_EXPR(cctx, ISN_ECHOMSG, count); |
| 1684 | else if (cmdidx == CMD_echoconsole) |
| 1685 | generate_MULT_EXPR(cctx, ISN_ECHOCONSOLE, count); |
| 1686 | else |
| 1687 | generate_MULT_EXPR(cctx, ISN_ECHOERR, count); |
| 1688 | |
| 1689 | cctx->ctx_lnum = save_lnum; |
| 1690 | } |
| 1691 | return p; |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * If "eap" has a range that is not a constant generate an ISN_RANGE |
| 1696 | * instruction to compute it and return OK. |
| 1697 | * Otherwise return FAIL, the caller must deal with any range. |
| 1698 | */ |
| 1699 | static int |
| 1700 | compile_variable_range(exarg_T *eap, cctx_T *cctx) |
| 1701 | { |
| 1702 | char_u *range_end = skip_range(eap->cmd, TRUE, NULL); |
| 1703 | char_u *p = skipdigits(eap->cmd); |
| 1704 | |
| 1705 | if (p == range_end) |
| 1706 | return FAIL; |
| 1707 | return generate_RANGE(cctx, vim_strnsave(eap->cmd, range_end - eap->cmd)); |
| 1708 | } |
| 1709 | |
| 1710 | /* |
| 1711 | * :put r |
| 1712 | * :put ={expr} |
| 1713 | */ |
| 1714 | char_u * |
| 1715 | compile_put(char_u *arg, exarg_T *eap, cctx_T *cctx) |
| 1716 | { |
| 1717 | char_u *line = arg; |
| 1718 | linenr_T lnum; |
| 1719 | char *errormsg; |
| 1720 | int above = eap->forceit; |
| 1721 | |
| 1722 | eap->regname = *line; |
| 1723 | |
| 1724 | if (eap->regname == '=') |
| 1725 | { |
| 1726 | char_u *p = line + 1; |
| 1727 | |
| 1728 | if (compile_expr0(&p, cctx) == FAIL) |
| 1729 | return NULL; |
| 1730 | line = p; |
| 1731 | } |
| 1732 | else if (eap->regname != NUL) |
| 1733 | ++line; |
| 1734 | |
| 1735 | if (compile_variable_range(eap, cctx) == OK) |
| 1736 | { |
| 1737 | lnum = above ? LNUM_VARIABLE_RANGE_ABOVE : LNUM_VARIABLE_RANGE; |
| 1738 | } |
| 1739 | else |
| 1740 | { |
| 1741 | // Either no range or a number. |
| 1742 | // "errormsg" will not be set because the range is ADDR_LINES. |
| 1743 | if (parse_cmd_address(eap, &errormsg, FALSE) == FAIL) |
| 1744 | // cannot happen |
| 1745 | return NULL; |
| 1746 | if (eap->addr_count == 0) |
| 1747 | lnum = -1; |
| 1748 | else |
| 1749 | lnum = eap->line2; |
| 1750 | if (above) |
| 1751 | --lnum; |
| 1752 | } |
| 1753 | |
| 1754 | generate_PUT(cctx, eap->regname, lnum); |
| 1755 | return line; |
| 1756 | } |
| 1757 | |
| 1758 | /* |
| 1759 | * A command that is not compiled, execute with legacy code. |
| 1760 | */ |
| 1761 | char_u * |
| 1762 | compile_exec(char_u *line_arg, exarg_T *eap, cctx_T *cctx) |
| 1763 | { |
| 1764 | char_u *line = line_arg; |
| 1765 | char_u *p; |
| 1766 | int has_expr = FALSE; |
| 1767 | char_u *nextcmd = (char_u *)""; |
| 1768 | char_u *tofree = NULL; |
| 1769 | char_u *cmd_arg = NULL; |
| 1770 | |
| 1771 | if (cctx->ctx_skip == SKIP_YES) |
| 1772 | goto theend; |
| 1773 | |
| 1774 | // If there was a prececing command modifier, drop it and include it in the |
| 1775 | // EXEC command. |
| 1776 | if (cctx->ctx_has_cmdmod) |
| 1777 | { |
| 1778 | garray_T *instr = &cctx->ctx_instr; |
| 1779 | isn_T *isn = ((isn_T *)instr->ga_data) + instr->ga_len - 1; |
| 1780 | |
| 1781 | if (isn->isn_type == ISN_CMDMOD) |
| 1782 | { |
| 1783 | vim_regfree(isn->isn_arg.cmdmod.cf_cmdmod |
| 1784 | ->cmod_filter_regmatch.regprog); |
| 1785 | vim_free(isn->isn_arg.cmdmod.cf_cmdmod); |
| 1786 | --instr->ga_len; |
| 1787 | cctx->ctx_has_cmdmod = FALSE; |
| 1788 | } |
| 1789 | } |
| 1790 | |
| 1791 | if (eap->cmdidx >= 0 && eap->cmdidx < CMD_SIZE) |
| 1792 | { |
| 1793 | long argt = eap->argt; |
| 1794 | int usefilter = FALSE; |
| 1795 | |
| 1796 | has_expr = argt & (EX_XFILE | EX_EXPAND); |
| 1797 | |
| 1798 | // If the command can be followed by a bar, find the bar and truncate |
| 1799 | // it, so that the following command can be compiled. |
| 1800 | // The '|' is overwritten with a NUL, it is put back below. |
| 1801 | if ((eap->cmdidx == CMD_write || eap->cmdidx == CMD_read) |
| 1802 | && *eap->arg == '!') |
| 1803 | // :w !filter or :r !filter or :r! filter |
| 1804 | usefilter = TRUE; |
| 1805 | if ((argt & EX_TRLBAR) && !usefilter) |
| 1806 | { |
| 1807 | eap->argt = argt; |
| 1808 | separate_nextcmd(eap); |
| 1809 | if (eap->nextcmd != NULL) |
| 1810 | nextcmd = eap->nextcmd; |
| 1811 | } |
| 1812 | else if (eap->cmdidx == CMD_wincmd) |
| 1813 | { |
| 1814 | p = eap->arg; |
| 1815 | if (*p != NUL) |
| 1816 | ++p; |
| 1817 | if (*p == 'g' || *p == Ctrl_G) |
| 1818 | ++p; |
| 1819 | p = skipwhite(p); |
| 1820 | if (*p == '|') |
| 1821 | { |
| 1822 | *p = NUL; |
| 1823 | nextcmd = p + 1; |
| 1824 | } |
| 1825 | } |
| 1826 | else if (eap->cmdidx == CMD_command || eap->cmdidx == CMD_autocmd) |
| 1827 | { |
| 1828 | // If there is a trailing '{' read lines until the '}' |
| 1829 | p = eap->arg + STRLEN(eap->arg) - 1; |
| 1830 | while (p > eap->arg && VIM_ISWHITE(*p)) |
| 1831 | --p; |
| 1832 | if (*p == '{') |
| 1833 | { |
| 1834 | exarg_T ea; |
| 1835 | int flags; // unused |
| 1836 | int start_lnum = SOURCING_LNUM; |
| 1837 | |
| 1838 | CLEAR_FIELD(ea); |
| 1839 | ea.arg = eap->arg; |
| 1840 | fill_exarg_from_cctx(&ea, cctx); |
| 1841 | (void)may_get_cmd_block(&ea, p, &tofree, &flags); |
| 1842 | if (tofree != NULL) |
| 1843 | { |
| 1844 | *p = NUL; |
| 1845 | line = concat_str(line, tofree); |
| 1846 | if (line == NULL) |
| 1847 | goto theend; |
| 1848 | vim_free(tofree); |
| 1849 | tofree = line; |
| 1850 | SOURCING_LNUM = start_lnum; |
| 1851 | } |
| 1852 | } |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | if (eap->cmdidx == CMD_syntax && STRNCMP(eap->arg, "include ", 8) == 0) |
| 1857 | { |
| 1858 | // expand filename in "syntax include [@group] filename" |
| 1859 | has_expr = TRUE; |
| 1860 | eap->arg = skipwhite(eap->arg + 7); |
| 1861 | if (*eap->arg == '@') |
| 1862 | eap->arg = skiptowhite(eap->arg); |
| 1863 | } |
| 1864 | |
| 1865 | if ((eap->cmdidx == CMD_global || eap->cmdidx == CMD_vglobal) |
| 1866 | && STRLEN(eap->arg) > 4) |
| 1867 | { |
| 1868 | int delim = *eap->arg; |
| 1869 | |
| 1870 | p = skip_regexp_ex(eap->arg + 1, delim, TRUE, NULL, NULL, NULL); |
| 1871 | if (*p == delim) |
| 1872 | cmd_arg = p + 1; |
| 1873 | } |
| 1874 | |
| 1875 | if (eap->cmdidx == CMD_folddoopen || eap->cmdidx == CMD_folddoclosed) |
| 1876 | cmd_arg = eap->arg; |
| 1877 | |
| 1878 | if (cmd_arg != NULL) |
| 1879 | { |
| 1880 | exarg_T nea; |
| 1881 | |
| 1882 | CLEAR_FIELD(nea); |
| 1883 | nea.cmd = cmd_arg; |
| 1884 | p = find_ex_command(&nea, NULL, lookup_scriptitem, NULL); |
| 1885 | if (nea.cmdidx < CMD_SIZE) |
| 1886 | { |
| 1887 | has_expr = excmd_get_argt(nea.cmdidx) & (EX_XFILE | EX_EXPAND); |
| 1888 | if (has_expr) |
| 1889 | eap->arg = skiptowhite(eap->arg); |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | if (has_expr && (p = (char_u *)strstr((char *)eap->arg, "`=")) != NULL) |
| 1894 | { |
| 1895 | int count = 0; |
| 1896 | char_u *start = skipwhite(line); |
| 1897 | |
| 1898 | // :cmd xxx`=expr1`yyy`=expr2`zzz |
| 1899 | // PUSHS ":cmd xxx" |
| 1900 | // eval expr1 |
| 1901 | // PUSHS "yyy" |
| 1902 | // eval expr2 |
| 1903 | // PUSHS "zzz" |
| 1904 | // EXECCONCAT 5 |
| 1905 | for (;;) |
| 1906 | { |
| 1907 | if (p > start) |
| 1908 | { |
| 1909 | char_u *val = vim_strnsave(start, p - start); |
| 1910 | |
| 1911 | generate_PUSHS(cctx, &val); |
| 1912 | ++count; |
| 1913 | } |
| 1914 | p += 2; |
| 1915 | if (compile_expr0(&p, cctx) == FAIL) |
| 1916 | return NULL; |
| 1917 | may_generate_2STRING(-1, TRUE, cctx); |
| 1918 | ++count; |
| 1919 | p = skipwhite(p); |
| 1920 | if (*p != '`') |
| 1921 | { |
| 1922 | emsg(_(e_missing_backtick)); |
| 1923 | return NULL; |
| 1924 | } |
| 1925 | start = p + 1; |
| 1926 | |
| 1927 | p = (char_u *)strstr((char *)start, "`="); |
| 1928 | if (p == NULL) |
| 1929 | { |
| 1930 | if (*skipwhite(start) != NUL) |
| 1931 | { |
| 1932 | char_u *val = vim_strsave(start); |
| 1933 | |
| 1934 | generate_PUSHS(cctx, &val); |
| 1935 | ++count; |
| 1936 | } |
| 1937 | break; |
| 1938 | } |
| 1939 | } |
| 1940 | generate_EXECCONCAT(cctx, count); |
| 1941 | } |
| 1942 | else |
| 1943 | generate_EXEC_copy(cctx, ISN_EXEC, line); |
| 1944 | |
| 1945 | theend: |
| 1946 | if (*nextcmd != NUL) |
| 1947 | { |
| 1948 | // the parser expects a pointer to the bar, put it back |
| 1949 | --nextcmd; |
| 1950 | *nextcmd = '|'; |
| 1951 | } |
| 1952 | vim_free(tofree); |
| 1953 | |
| 1954 | return nextcmd; |
| 1955 | } |
| 1956 | |
| 1957 | /* |
| 1958 | * A script command with heredoc, e.g. |
| 1959 | * ruby << EOF |
| 1960 | * command |
| 1961 | * EOF |
| 1962 | * Has been turned into one long line with NL characters by |
| 1963 | * get_function_body(): |
| 1964 | * ruby << EOF<NL> command<NL>EOF |
| 1965 | */ |
| 1966 | char_u * |
| 1967 | compile_script(char_u *line, cctx_T *cctx) |
| 1968 | { |
| 1969 | if (cctx->ctx_skip != SKIP_YES) |
| 1970 | { |
| 1971 | isn_T *isn; |
| 1972 | |
| 1973 | if ((isn = generate_instr(cctx, ISN_EXEC_SPLIT)) == NULL) |
| 1974 | return NULL; |
| 1975 | isn->isn_arg.string = vim_strsave(line); |
| 1976 | } |
| 1977 | return (char_u *)""; |
| 1978 | } |
| 1979 | |
| 1980 | |
| 1981 | /* |
| 1982 | * :s/pat/repl/ |
| 1983 | */ |
| 1984 | char_u * |
| 1985 | compile_substitute(char_u *arg, exarg_T *eap, cctx_T *cctx) |
| 1986 | { |
| 1987 | char_u *cmd = eap->arg; |
| 1988 | char_u *expr = (char_u *)strstr((char *)cmd, "\\="); |
| 1989 | |
| 1990 | if (expr != NULL) |
| 1991 | { |
| 1992 | int delimiter = *cmd++; |
| 1993 | |
| 1994 | // There is a \=expr, find it in the substitute part. |
| 1995 | cmd = skip_regexp_ex(cmd, delimiter, magic_isset(), NULL, NULL, NULL); |
| 1996 | if (cmd[0] == delimiter && cmd[1] == '\\' && cmd[2] == '=') |
| 1997 | { |
| 1998 | garray_T save_ga = cctx->ctx_instr; |
| 1999 | char_u *end; |
| 2000 | int expr_res; |
| 2001 | int trailing_error; |
| 2002 | int instr_count; |
| 2003 | isn_T *instr; |
| 2004 | isn_T *isn; |
| 2005 | |
| 2006 | cmd += 3; |
| 2007 | end = skip_substitute(cmd, delimiter); |
| 2008 | |
| 2009 | // Temporarily reset the list of instructions so that the jump |
| 2010 | // labels are correct. |
| 2011 | cctx->ctx_instr.ga_len = 0; |
| 2012 | cctx->ctx_instr.ga_maxlen = 0; |
| 2013 | cctx->ctx_instr.ga_data = NULL; |
| 2014 | expr_res = compile_expr0(&cmd, cctx); |
| 2015 | if (end[-1] == NUL) |
| 2016 | end[-1] = delimiter; |
| 2017 | cmd = skipwhite(cmd); |
| 2018 | trailing_error = *cmd != delimiter && *cmd != NUL; |
| 2019 | |
| 2020 | if (expr_res == FAIL || trailing_error |
| 2021 | || GA_GROW_FAILS(&cctx->ctx_instr, 1)) |
| 2022 | { |
| 2023 | if (trailing_error) |
Bram Moolenaar | 74409f6 | 2022-01-01 15:58:22 +0000 | [diff] [blame] | 2024 | semsg(_(e_trailing_characters_str), cmd); |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 2025 | clear_instr_ga(&cctx->ctx_instr); |
| 2026 | cctx->ctx_instr = save_ga; |
| 2027 | return NULL; |
| 2028 | } |
| 2029 | |
| 2030 | // Move the generated instructions into the ISN_SUBSTITUTE |
| 2031 | // instructions, then restore the list of instructions before |
| 2032 | // adding the ISN_SUBSTITUTE instruction. |
| 2033 | instr_count = cctx->ctx_instr.ga_len; |
| 2034 | instr = cctx->ctx_instr.ga_data; |
| 2035 | instr[instr_count].isn_type = ISN_FINISH; |
| 2036 | |
| 2037 | cctx->ctx_instr = save_ga; |
| 2038 | if ((isn = generate_instr(cctx, ISN_SUBSTITUTE)) == NULL) |
| 2039 | { |
| 2040 | int idx; |
| 2041 | |
| 2042 | for (idx = 0; idx < instr_count; ++idx) |
| 2043 | delete_instr(instr + idx); |
| 2044 | vim_free(instr); |
| 2045 | return NULL; |
| 2046 | } |
| 2047 | isn->isn_arg.subs.subs_cmd = vim_strsave(arg); |
| 2048 | isn->isn_arg.subs.subs_instr = instr; |
| 2049 | |
| 2050 | // skip over flags |
| 2051 | if (*end == '&') |
| 2052 | ++end; |
| 2053 | while (ASCII_ISALPHA(*end) || *end == '#') |
| 2054 | ++end; |
| 2055 | return end; |
| 2056 | } |
| 2057 | } |
| 2058 | |
| 2059 | return compile_exec(arg, eap, cctx); |
| 2060 | } |
| 2061 | |
| 2062 | char_u * |
| 2063 | compile_redir(char_u *line, exarg_T *eap, cctx_T *cctx) |
| 2064 | { |
| 2065 | char_u *arg = eap->arg; |
| 2066 | lhs_T *lhs = &cctx->ctx_redir_lhs; |
| 2067 | |
| 2068 | if (lhs->lhs_name != NULL) |
| 2069 | { |
| 2070 | if (STRNCMP(arg, "END", 3) == 0) |
| 2071 | { |
| 2072 | if (lhs->lhs_append) |
| 2073 | { |
| 2074 | // First load the current variable value. |
| 2075 | if (compile_load_lhs_with_index(lhs, lhs->lhs_whole, |
| 2076 | cctx) == FAIL) |
| 2077 | return NULL; |
| 2078 | } |
| 2079 | |
| 2080 | // Gets the redirected text and put it on the stack, then store it |
| 2081 | // in the variable. |
| 2082 | generate_instr_type(cctx, ISN_REDIREND, &t_string); |
| 2083 | |
| 2084 | if (lhs->lhs_append) |
| 2085 | generate_instr_drop(cctx, ISN_CONCAT, 1); |
| 2086 | |
| 2087 | if (lhs->lhs_has_index) |
| 2088 | { |
| 2089 | // Use the info in "lhs" to store the value at the index in the |
| 2090 | // list or dict. |
| 2091 | if (compile_assign_unlet(lhs->lhs_whole, lhs, TRUE, |
| 2092 | &t_string, cctx) == FAIL) |
| 2093 | return NULL; |
| 2094 | } |
Bram Moolenaar | 5cd6479 | 2021-12-25 18:23:24 +0000 | [diff] [blame] | 2095 | else if (generate_store_lhs(cctx, lhs, -1, FALSE) == FAIL) |
Bram Moolenaar | dc7c366 | 2021-12-20 15:04:29 +0000 | [diff] [blame] | 2096 | return NULL; |
| 2097 | |
| 2098 | VIM_CLEAR(lhs->lhs_name); |
| 2099 | VIM_CLEAR(lhs->lhs_whole); |
| 2100 | return arg + 3; |
| 2101 | } |
| 2102 | emsg(_(e_cannot_nest_redir)); |
| 2103 | return NULL; |
| 2104 | } |
| 2105 | |
| 2106 | if (arg[0] == '=' && arg[1] == '>') |
| 2107 | { |
| 2108 | int append = FALSE; |
| 2109 | |
| 2110 | // redirect to a variable is compiled |
| 2111 | arg += 2; |
| 2112 | if (*arg == '>') |
| 2113 | { |
| 2114 | ++arg; |
| 2115 | append = TRUE; |
| 2116 | } |
| 2117 | arg = skipwhite(arg); |
| 2118 | |
| 2119 | if (compile_assign_lhs(arg, lhs, CMD_redir, |
| 2120 | FALSE, FALSE, 1, cctx) == FAIL) |
| 2121 | return NULL; |
| 2122 | if (need_type(&t_string, lhs->lhs_member_type, |
| 2123 | -1, 0, cctx, FALSE, FALSE) == FAIL) |
| 2124 | return NULL; |
| 2125 | generate_instr(cctx, ISN_REDIRSTART); |
| 2126 | lhs->lhs_append = append; |
| 2127 | if (lhs->lhs_has_index) |
| 2128 | { |
| 2129 | lhs->lhs_whole = vim_strnsave(arg, lhs->lhs_varlen_total); |
| 2130 | if (lhs->lhs_whole == NULL) |
| 2131 | return NULL; |
| 2132 | } |
| 2133 | |
| 2134 | return arg + lhs->lhs_varlen_total; |
| 2135 | } |
| 2136 | |
| 2137 | // other redirects are handled like at script level |
| 2138 | return compile_exec(line, eap, cctx); |
| 2139 | } |
| 2140 | |
| 2141 | #if defined(FEAT_QUICKFIX) || defined(PROTO) |
| 2142 | char_u * |
| 2143 | compile_cexpr(char_u *line, exarg_T *eap, cctx_T *cctx) |
| 2144 | { |
| 2145 | isn_T *isn; |
| 2146 | char_u *p; |
| 2147 | |
| 2148 | isn = generate_instr(cctx, ISN_CEXPR_AUCMD); |
| 2149 | if (isn == NULL) |
| 2150 | return NULL; |
| 2151 | isn->isn_arg.number = eap->cmdidx; |
| 2152 | |
| 2153 | p = eap->arg; |
| 2154 | if (compile_expr0(&p, cctx) == FAIL) |
| 2155 | return NULL; |
| 2156 | |
| 2157 | isn = generate_instr(cctx, ISN_CEXPR_CORE); |
| 2158 | if (isn == NULL) |
| 2159 | return NULL; |
| 2160 | isn->isn_arg.cexpr.cexpr_ref = ALLOC_ONE(cexprref_T); |
| 2161 | if (isn->isn_arg.cexpr.cexpr_ref == NULL) |
| 2162 | return NULL; |
| 2163 | isn->isn_arg.cexpr.cexpr_ref->cer_cmdidx = eap->cmdidx; |
| 2164 | isn->isn_arg.cexpr.cexpr_ref->cer_forceit = eap->forceit; |
| 2165 | isn->isn_arg.cexpr.cexpr_ref->cer_cmdline = vim_strsave(skipwhite(line)); |
| 2166 | |
| 2167 | return p; |
| 2168 | } |
| 2169 | #endif |
| 2170 | |
| 2171 | /* |
| 2172 | * Compile "return [expr]". |
| 2173 | * When "legacy" is TRUE evaluate [expr] with legacy syntax |
| 2174 | */ |
| 2175 | char_u * |
| 2176 | compile_return(char_u *arg, int check_return_type, int legacy, cctx_T *cctx) |
| 2177 | { |
| 2178 | char_u *p = arg; |
| 2179 | garray_T *stack = &cctx->ctx_type_stack; |
| 2180 | type_T *stack_type; |
| 2181 | |
| 2182 | if (*p != NUL && *p != '|' && *p != '\n') |
| 2183 | { |
| 2184 | if (legacy) |
| 2185 | { |
| 2186 | int save_flags = cmdmod.cmod_flags; |
| 2187 | |
| 2188 | generate_LEGACY_EVAL(cctx, p); |
| 2189 | if (need_type(&t_any, cctx->ctx_ufunc->uf_ret_type, -1, |
| 2190 | 0, cctx, FALSE, FALSE) == FAIL) |
| 2191 | return NULL; |
| 2192 | cmdmod.cmod_flags |= CMOD_LEGACY; |
| 2193 | (void)skip_expr(&p, NULL); |
| 2194 | cmdmod.cmod_flags = save_flags; |
| 2195 | } |
| 2196 | else |
| 2197 | { |
| 2198 | // compile return argument into instructions |
| 2199 | if (compile_expr0(&p, cctx) == FAIL) |
| 2200 | return NULL; |
| 2201 | } |
| 2202 | |
| 2203 | if (cctx->ctx_skip != SKIP_YES) |
| 2204 | { |
| 2205 | // "check_return_type" with uf_ret_type set to &t_unknown is used |
| 2206 | // for an inline function without a specified return type. Set the |
| 2207 | // return type here. |
| 2208 | stack_type = ((type_T **)stack->ga_data)[stack->ga_len - 1]; |
| 2209 | if ((check_return_type && (cctx->ctx_ufunc->uf_ret_type == NULL |
| 2210 | || cctx->ctx_ufunc->uf_ret_type == &t_unknown |
| 2211 | || cctx->ctx_ufunc->uf_ret_type == &t_any)) |
| 2212 | || (!check_return_type |
| 2213 | && cctx->ctx_ufunc->uf_ret_type == &t_unknown)) |
| 2214 | { |
| 2215 | cctx->ctx_ufunc->uf_ret_type = stack_type; |
| 2216 | } |
| 2217 | else |
| 2218 | { |
| 2219 | if (cctx->ctx_ufunc->uf_ret_type->tt_type == VAR_VOID |
| 2220 | && stack_type->tt_type != VAR_VOID |
| 2221 | && stack_type->tt_type != VAR_UNKNOWN) |
| 2222 | { |
| 2223 | emsg(_(e_returning_value_in_function_without_return_type)); |
| 2224 | return NULL; |
| 2225 | } |
| 2226 | if (need_type(stack_type, cctx->ctx_ufunc->uf_ret_type, -1, |
| 2227 | 0, cctx, FALSE, FALSE) == FAIL) |
| 2228 | return NULL; |
| 2229 | } |
| 2230 | } |
| 2231 | } |
| 2232 | else |
| 2233 | { |
| 2234 | // "check_return_type" cannot be TRUE, only used for a lambda which |
| 2235 | // always has an argument. |
| 2236 | if (cctx->ctx_ufunc->uf_ret_type->tt_type != VAR_VOID |
| 2237 | && cctx->ctx_ufunc->uf_ret_type->tt_type != VAR_UNKNOWN) |
| 2238 | { |
| 2239 | emsg(_(e_missing_return_value)); |
| 2240 | return NULL; |
| 2241 | } |
| 2242 | |
| 2243 | // No argument, return zero. |
| 2244 | generate_PUSHNR(cctx, 0); |
| 2245 | } |
| 2246 | |
| 2247 | // Undo any command modifiers. |
| 2248 | generate_undo_cmdmods(cctx); |
| 2249 | |
| 2250 | if (cctx->ctx_skip != SKIP_YES && generate_instr(cctx, ISN_RETURN) == NULL) |
| 2251 | return NULL; |
| 2252 | |
| 2253 | // "return val | endif" is possible |
| 2254 | return skipwhite(p); |
| 2255 | } |
| 2256 | |
| 2257 | /* |
| 2258 | * Check if the separator for a :global or :substitute command is OK. |
| 2259 | */ |
| 2260 | int |
| 2261 | check_global_and_subst(char_u *cmd, char_u *arg) |
| 2262 | { |
| 2263 | if (arg == cmd + 1 && vim_strchr((char_u *)":-.", *arg) != NULL) |
| 2264 | { |
| 2265 | semsg(_(e_separator_not_supported_str), arg); |
| 2266 | return FAIL; |
| 2267 | } |
| 2268 | if (VIM_ISWHITE(cmd[1])) |
| 2269 | { |
| 2270 | semsg(_(e_no_white_space_allowed_before_separator_str), cmd); |
| 2271 | return FAIL; |
| 2272 | } |
| 2273 | return OK; |
| 2274 | } |
| 2275 | |
| 2276 | |
| 2277 | #endif // defined(FEAT_EVAL) |