Commit | Line | Data |
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a0d0e21e | 1 | /* perly.y |
a687059c | 2 | * |
f05e27e5 | 3 | * Copyright (c) 1991-2002, 2003, 2004, 2005, 2006 Larry Wall |
2eee27d7 | 4 | * Copyright (c) 2007, 2008, 2009, 2010, 2011 by Larry Wall and others |
a687059c | 5 | * |
9ef589d8 LW |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. | |
8d063cd8 | 8 | * |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
12 | * 'I see,' laughed Strider. 'I look foul and feel fair. Is that it? | |
4ac71550 | 13 | * All that is gold does not glitter, not all those who wander are lost.' |
f05e27e5 | 14 | * |
4ac71550 TC |
15 | * [p.171 of _The Lord of the Rings_, I/x: "Strider"] |
16 | */ | |
17 | ||
18 | /* | |
f05e27e5 | 19 | * This file holds the grammar for the Perl language. If edited, you need |
166f8a29 DM |
20 | * to run regen_perly.pl, which re-creates the files perly.h, perly.tab |
21 | * and perly.act which are derived from this. | |
22 | * | |
23 | * The main job of of this grammar is to call the various newFOO() | |
24 | * functions in op.c to build a syntax tree of OP structs. | |
61296642 | 25 | * It relies on the lexer in toke.c to do the tokenizing. |
29522234 DM |
26 | * |
27 | * Note: due to the way that the cleanup code works WRT to freeing ops on | |
28 | * the parse stack, it is dangerous to assign to the $n variables within | |
29 | * an action. | |
166f8a29 DM |
30 | */ |
31 | ||
0de566d7 | 32 | /* Make the parser re-entrant. */ |
8d063cd8 | 33 | |
0de566d7 | 34 | %pure_parser |
8d063cd8 | 35 | |
28ac2b49 | 36 | %start grammar |
9d116dd7 | 37 | |
8d063cd8 | 38 | %union { |
d5c6462e DM |
39 | I32 ival; /* __DEFAULT__ (marker for regen_perly.pl; |
40 | must always be 1st union member) */ | |
79072805 LW |
41 | char *pval; |
42 | OP *opval; | |
43 | GV *gvval; | |
8d063cd8 LW |
44 | } |
45 | ||
78cdf107 | 46 | %token <ival> GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ |
28ac2b49 | 47 | |
b5bbe64a | 48 | %token <ival> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';' '=' '.' |
f0fcb552 | 49 | |
ea25a9b2 | 50 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST |
7eb971ee | 51 | %token <opval> FUNC0OP FUNC0SUB UNIOPSUB LSTOPSUB |
88e1f1a2 | 52 | %token <opval> PLUGEXPR PLUGSTMT |
b5bbe64a JH |
53 | %token <pval> LABEL |
54 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE | |
55 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR | |
56 | %token <ival> GIVEN WHEN DEFAULT | |
57 | %token <ival> LOOPEX DOTDOT YADAYADA | |
58 | %token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP | |
59 | %token <ival> RELOP EQOP MULOP ADDOP | |
60 | %token <ival> DOLSHARP DO HASHBRACK NOAMP | |
61 | %token <ival> LOCAL MY REQUIRE | |
62 | %token <ival> COLONATTR FORMLBRACK FORMRBRACK | |
f05e27e5 | 63 | |
727a8fe5 | 64 | %type <ival> grammar remember mremember |
f05e27e5 | 65 | %type <ival> startsub startanonsub startformsub |
b5bbe64a | 66 | |
b5a64814 | 67 | %type <ival> mintro |
f05e27e5 | 68 | |
8e720305 | 69 | %type <opval> stmtseq fullstmt labfullstmt barestmt block mblock else |
fad39ff1 | 70 | %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff |
76eba8ab | 71 | %type <opval> sliceme kvslice gelem |
09b1cffe Z |
72 | %type <opval> listexpr nexpr texpr iexpr mexpr mnexpr miexpr |
73 | %type <opval> optlistexpr optexpr indirob listop method | |
30d9c59b | 74 | %type <opval> formname subname proto optsubbody cont my_scalar formblock |
f05e27e5 | 75 | %type <opval> subattrlist myattrlist myattrterm myterm |
30d9c59b | 76 | %type <opval> realsubbody subsignature termbinop termunop anonymous termdo |
705fe0e5 | 77 | %type <opval> formstmtseq formline formarg |
79072805 | 78 | |
b5bbe64a | 79 | %nonassoc <ival> PREC_LOW |
fad39ff1 SM |
80 | %nonassoc LOOPEX |
81 | ||
b5bbe64a JH |
82 | %left <ival> OROP DOROP |
83 | %left <ival> ANDOP | |
84 | %right <ival> NOTOP | |
36477c24 | 85 | %nonassoc LSTOP LSTOPSUB |
b5bbe64a JH |
86 | %left <ival> ',' |
87 | %right <ival> ASSIGNOP | |
88 | %right <ival> '?' ':' | |
be25f609 | 89 | %nonassoc DOTDOT YADAYADA |
b5bbe64a JH |
90 | %left <ival> OROR DORDOR |
91 | %left <ival> ANDAND | |
92 | %left <ival> BITOROP | |
93 | %left <ival> BITANDOP | |
a687059c LW |
94 | %nonassoc EQOP |
95 | %nonassoc RELOP | |
36477c24 | 96 | %nonassoc UNIOP UNIOPSUB |
20515881 | 97 | %nonassoc REQUIRE |
b5bbe64a | 98 | %left <ival> SHIFTOP |
a687059c LW |
99 | %left ADDOP |
100 | %left MULOP | |
b5bbe64a JH |
101 | %left <ival> MATCHOP |
102 | %right <ival> '!' '~' UMINUS REFGEN | |
103 | %right <ival> POWOP | |
104 | %nonassoc <ival> PREINC PREDEC POSTINC POSTDEC POSTJOIN | |
105 | %left <ival> ARROW | |
106 | %nonassoc <ival> ')' | |
107 | %left <ival> '(' | |
fad39ff1 | 108 | %left '[' '{' |
8d063cd8 LW |
109 | |
110 | %% /* RULES */ | |
111 | ||
28ac2b49 | 112 | /* Top-level choice of what kind of thing yyparse was called to parse */ |
727a8fe5 Z |
113 | grammar : GRAMPROG |
114 | { | |
115 | PL_parser->expect = XSTATE; | |
116 | } | |
117 | remember stmtseq | |
118 | { | |
119 | newPROG(block_end($3,$4)); | |
120 | $$ = 0; | |
121 | } | |
78cdf107 Z |
122 | | GRAMEXPR |
123 | { | |
124 | parser->expect = XTERM; | |
125 | } | |
09b1cffe | 126 | optexpr |
78cdf107 Z |
127 | { |
128 | PL_eval_root = $3; | |
129 | $$ = 0; | |
130 | } | |
e53d8f76 Z |
131 | | GRAMBLOCK |
132 | { | |
133 | parser->expect = XBLOCK; | |
134 | } | |
135 | block | |
136 | { | |
5f211341 | 137 | PL_pad_reset_pending = TRUE; |
8359b381 Z |
138 | PL_eval_root = $3; |
139 | $$ = 0; | |
140 | yyunlex(); | |
141 | parser->yychar = YYEOF; | |
142 | } | |
143 | | GRAMBARESTMT | |
144 | { | |
145 | parser->expect = XSTATE; | |
146 | } | |
147 | barestmt | |
148 | { | |
149 | PL_pad_reset_pending = TRUE; | |
e53d8f76 Z |
150 | PL_eval_root = $3; |
151 | $$ = 0; | |
152 | yyunlex(); | |
153 | parser->yychar = YYEOF; | |
154 | } | |
9eb5c532 | 155 | | GRAMFULLSTMT |
28ac2b49 | 156 | { |
9eb5c532 Z |
157 | parser->expect = XSTATE; |
158 | } | |
159 | fullstmt | |
160 | { | |
5f211341 | 161 | PL_pad_reset_pending = TRUE; |
9eb5c532 | 162 | PL_eval_root = $3; |
28ac2b49 Z |
163 | $$ = 0; |
164 | yyunlex(); | |
165 | parser->yychar = YYEOF; | |
166 | } | |
07ffcb73 Z |
167 | | GRAMSTMTSEQ |
168 | { | |
169 | parser->expect = XSTATE; | |
170 | } | |
5f211341 | 171 | stmtseq |
07ffcb73 Z |
172 | { |
173 | PL_eval_root = $3; | |
174 | $$ = 0; | |
175 | } | |
176 | ; | |
177 | ||
891be019 | 178 | /* An ordinary block */ |
5f211341 | 179 | block : '{' remember stmtseq '}' |
b5bbe64a JH |
180 | { if (PL_parser->copline > (line_t)$1) |
181 | PL_parser->copline = (line_t)$1; | |
f05e27e5 | 182 | $$ = block_end($2, $3); |
f05e27e5 | 183 | } |
a0d0e21e LW |
184 | ; |
185 | ||
7c70caa5 | 186 | /* format body */ |
705fe0e5 | 187 | formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.' |
b5bbe64a JH |
188 | { if (PL_parser->copline > (line_t)$1) |
189 | PL_parser->copline = (line_t)$1; | |
705fe0e5 | 190 | $$ = block_end($2, $5); |
7c70caa5 FC |
191 | } |
192 | ; | |
193 | ||
55497cff | 194 | remember: /* NULL */ /* start a full lexical scope */ |
195 | { $$ = block_start(TRUE); } | |
196 | ; | |
197 | ||
5f211341 | 198 | mblock : '{' mremember stmtseq '}' |
b5bbe64a JH |
199 | { if (PL_parser->copline > (line_t)$1) |
200 | PL_parser->copline = (line_t)$1; | |
f05e27e5 | 201 | $$ = block_end($2, $3); |
f05e27e5 | 202 | } |
55497cff | 203 | ; |
204 | ||
205 | mremember: /* NULL */ /* start a partial lexical scope */ | |
206 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
207 | ; |
208 | ||
eae48c89 | 209 | /* A sequence of statements in the program */ |
5f211341 | 210 | stmtseq : /* NULL */ |
bcabcc50 | 211 | { $$ = (OP*)NULL; } |
5f211341 | 212 | | stmtseq fullstmt |
2fcb4757 | 213 | { $$ = op_append_list(OP_LINESEQ, $1, $2); |
3280af22 | 214 | PL_pad_reset_pending = TRUE; |
503de470 DM |
215 | if ($1 && $2) |
216 | PL_hints |= HINT_BLOCK_SCOPE; | |
217 | } | |
8d063cd8 LW |
218 | ; |
219 | ||
705fe0e5 FC |
220 | /* A sequence of format lines */ |
221 | formstmtseq: /* NULL */ | |
222 | { $$ = (OP*)NULL; } | |
223 | | formstmtseq formline | |
224 | { $$ = op_append_list(OP_LINESEQ, $1, $2); | |
225 | PL_pad_reset_pending = TRUE; | |
226 | if ($1 && $2) | |
227 | PL_hints |= HINT_BLOCK_SCOPE; | |
228 | } | |
229 | ; | |
230 | ||
8e720305 Z |
231 | /* A statement in the program, including optional labels */ |
232 | fullstmt: barestmt | |
eae48c89 | 233 | { |
b5bbe64a | 234 | $$ = $1 ? newSTATEOP(0, NULL, $1) : NULL; |
eae48c89 | 235 | } |
8e720305 Z |
236 | | labfullstmt |
237 | { $$ = $1; } | |
238 | ; | |
239 | ||
240 | labfullstmt: LABEL barestmt | |
241 | { | |
b5bbe64a | 242 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 Z |
243 | } |
244 | | LABEL labfullstmt | |
245 | { | |
b5bbe64a | 246 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 | 247 | } |
eae48c89 Z |
248 | ; |
249 | ||
250 | /* A bare statement, lacking label and other aspects of state op */ | |
251 | barestmt: PLUGSTMT | |
0d863452 | 252 | { $$ = $1; } |
7c70caa5 | 253 | | FORMAT startformsub formname formblock |
f05e27e5 | 254 | { |
eae48c89 | 255 | CV *fmtcv = PL_compcv; |
eae48c89 Z |
256 | newFORM($2, $3, $4); |
257 | $$ = (OP*)NULL; | |
4a273b91 | 258 | if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) { |
eae48c89 | 259 | SvREFCNT_inc_simple_void(fmtcv); |
cc76b5cc | 260 | pad_add_anon(fmtcv, OP_NULL); |
f05e27e5 | 261 | } |
eae48c89 | 262 | } |
50278755 FC |
263 | | SUB subname startsub |
264 | { | |
265 | if ($2->op_type == OP_CONST) { | |
266 | const char *const name = | |
267 | SvPV_nolen_const(((SVOP*)$2)->op_sv); | |
268 | if (strEQ(name, "BEGIN") || strEQ(name, "END") | |
764212cf FC |
269 | || strEQ(name, "INIT") || strEQ(name, "CHECK") |
270 | || strEQ(name, "UNITCHECK")) | |
271 | CvSPECIAL_on(PL_compcv); | |
50278755 | 272 | } |
e07561e6 FC |
273 | else |
274 | /* State subs inside anonymous subs need to be | |
275 | clonable themselves. */ | |
6d5c2147 FC |
276 | if (CvANON(CvOUTSIDE(PL_compcv)) |
277 | || CvCLONE(CvOUTSIDE(PL_compcv)) | |
278 | || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST( | |
279 | CvOUTSIDE(PL_compcv) | |
280 | ))[$2->op_targ])) | |
e07561e6 | 281 | CvCLONE_on(PL_compcv); |
764212cf FC |
282 | PL_parser->in_my = 0; |
283 | PL_parser->in_my_stash = NULL; | |
284 | } | |
30d9c59b | 285 | proto subattrlist optsubbody |
eae48c89 Z |
286 | { |
287 | SvREFCNT_inc_simple_void(PL_compcv); | |
50278755 FC |
288 | $2->op_type == OP_CONST |
289 | ? newATTRSUB($3, $2, $5, $6, $7) | |
290 | : newMYSUB($3, $2, $5, $6, $7) | |
50278755 | 291 | ; |
eae48c89 | 292 | $$ = (OP*)NULL; |
764212cf | 293 | intro_my(); |
f05e27e5 | 294 | } |
eae48c89 | 295 | | PACKAGE WORD WORD ';' |
5f211341 | 296 | { |
eae48c89 Z |
297 | package($3); |
298 | if ($2) | |
299 | package_version($2); | |
300 | $$ = (OP*)NULL; | |
eae48c89 Z |
301 | } |
302 | | USE startsub | |
303 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } | |
09b1cffe | 304 | WORD WORD optlistexpr ';' |
eae48c89 Z |
305 | { |
306 | SvREFCNT_inc_simple_void(PL_compcv); | |
b5bbe64a | 307 | utilize($1, $2, $4, $5, $6); |
eae48c89 | 308 | $$ = (OP*)NULL; |
eae48c89 | 309 | } |
417a992d | 310 | | IF '(' remember mexpr ')' mblock else |
eae48c89 | 311 | { |
3ad73efd Z |
312 | $$ = block_end($3, |
313 | newCONDOP(0, $4, op_scope($6), $7)); | |
b5bbe64a | 314 | PL_parser->copline = (line_t)$1; |
eae48c89 | 315 | } |
417a992d | 316 | | UNLESS '(' remember miexpr ')' mblock else |
eae48c89 | 317 | { |
3ad73efd Z |
318 | $$ = block_end($3, |
319 | newCONDOP(0, $4, op_scope($6), $7)); | |
b5bbe64a | 320 | PL_parser->copline = (line_t)$1; |
eae48c89 | 321 | } |
b5a64814 | 322 | | GIVEN '(' remember mexpr ')' mblock |
eae48c89 | 323 | { |
b5a64814 | 324 | const PADOFFSET offset = pad_findmy_pvs("$_", 0); |
eae48c89 | 325 | $$ = block_end($3, |
b5a64814 FC |
326 | newGIVENOP($4, op_scope($6), |
327 | offset == NOT_IN_PAD | |
328 | || PAD_COMPNAME_FLAGS_isOUR(offset) | |
329 | ? 0 | |
330 | : offset)); | |
b5bbe64a | 331 | PL_parser->copline = (line_t)$1; |
eae48c89 | 332 | } |
417a992d | 333 | | WHEN '(' remember mexpr ')' mblock |
3ad73efd | 334 | { $$ = block_end($3, newWHENOP($4, op_scope($6))); } |
eae48c89 | 335 | | DEFAULT block |
3ad73efd | 336 | { $$ = newWHENOP(0, op_scope($2)); } |
417a992d | 337 | | WHILE '(' remember texpr ')' mintro mblock cont |
eae48c89 Z |
338 | { |
339 | $$ = block_end($3, | |
340 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 341 | $4, $7, $8, $6)); |
b5bbe64a | 342 | PL_parser->copline = (line_t)$1; |
eae48c89 | 343 | } |
417a992d | 344 | | UNTIL '(' remember iexpr ')' mintro mblock cont |
eae48c89 Z |
345 | { |
346 | $$ = block_end($3, | |
94bf0465 Z |
347 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
348 | $4, $7, $8, $6)); | |
b5bbe64a | 349 | PL_parser->copline = (line_t)$1; |
eae48c89 | 350 | } |
417a992d | 351 | | FOR '(' remember mnexpr ';' texpr ';' mintro mnexpr ')' |
eae48c89 Z |
352 | mblock |
353 | { | |
b5bbe64a | 354 | OP *initop = $4; |
eae48c89 | 355 | OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
94bf0465 | 356 | scalar($6), $11, $9, $8); |
eae48c89 Z |
357 | if (initop) { |
358 | forop = op_prepend_elem(OP_LINESEQ, initop, | |
359 | op_append_elem(OP_LINESEQ, | |
360 | newOP(OP_UNSTACK, OPf_SPECIAL), | |
361 | forop)); | |
5f211341 | 362 | } |
eae48c89 | 363 | $$ = block_end($3, forop); |
b5bbe64a | 364 | PL_parser->copline = (line_t)$1; |
eae48c89 | 365 | } |
417a992d | 366 | | FOR MY remember my_scalar '(' mexpr ')' mblock cont |
eae48c89 | 367 | { |
94bf0465 | 368 | $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); |
b5bbe64a | 369 | PL_parser->copline = (line_t)$1; |
eae48c89 | 370 | } |
417a992d | 371 | | FOR scalar '(' remember mexpr ')' mblock cont |
eae48c89 | 372 | { |
94bf0465 | 373 | $$ = block_end($4, newFOROP(0, |
3ad73efd | 374 | op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); |
b5bbe64a | 375 | PL_parser->copline = (line_t)$1; |
eae48c89 | 376 | } |
417a992d | 377 | | FOR '(' remember mexpr ')' mblock cont |
eae48c89 Z |
378 | { |
379 | $$ = block_end($3, | |
94bf0465 | 380 | newFOROP(0, (OP*)NULL, $4, $6, $7)); |
b5bbe64a | 381 | PL_parser->copline = (line_t)$1; |
eae48c89 Z |
382 | } |
383 | | block cont | |
384 | { | |
385 | /* a block is a loop that happens once */ | |
386 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 387 | (OP*)NULL, $1, $2, 0); |
eae48c89 Z |
388 | } |
389 | | PACKAGE WORD WORD '{' remember | |
390 | { | |
eae48c89 | 391 | package($3); |
eae48c89 | 392 | if ($2) { |
eae48c89 | 393 | package_version($2); |
eae48c89 Z |
394 | } |
395 | } | |
396 | stmtseq '}' | |
397 | { | |
398 | /* a block is a loop that happens once */ | |
94bf0465 | 399 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
eae48c89 | 400 | (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); |
b5bbe64a JH |
401 | if (PL_parser->copline > (line_t)$4) |
402 | PL_parser->copline = (line_t)$4; | |
eae48c89 Z |
403 | } |
404 | | sideff ';' | |
405 | { | |
406 | PL_parser->expect = XSTATE; | |
407 | $$ = $1; | |
eae48c89 Z |
408 | } |
409 | | ';' | |
410 | { | |
411 | PL_parser->expect = XSTATE; | |
b5bbe64a | 412 | $$ = (OP*)NULL; |
eae48c89 | 413 | PL_parser->copline = NOLINE; |
5f211341 | 414 | } |
8d063cd8 LW |
415 | ; |
416 | ||
705fe0e5 FC |
417 | /* Format line */ |
418 | formline: THING formarg | |
419 | { OP *list; | |
420 | if ($2) { | |
421 | OP *term = $2; | |
705fe0e5 FC |
422 | list = op_append_elem(OP_LIST, $1, term); |
423 | } | |
424 | else { | |
705fe0e5 | 425 | list = $1; |
705fe0e5 FC |
426 | } |
427 | if (PL_parser->copline == NOLINE) | |
428 | PL_parser->copline = CopLINE(PL_curcop)-1; | |
429 | else PL_parser->copline--; | |
430 | $$ = newSTATEOP(0, NULL, | |
431 | convert(OP_FORMLINE, 0, list)); | |
432 | } | |
433 | ; | |
434 | ||
435 | formarg : /* NULL */ | |
436 | { $$ = NULL; } | |
437 | | FORMLBRACK stmtseq FORMRBRACK | |
438 | { $$ = op_unscope($2); } | |
439 | ; | |
440 | ||
891be019 | 441 | /* An expression which may have a side-effect */ |
a687059c | 442 | sideff : error |
bcabcc50 | 443 | { $$ = (OP*)NULL; } |
a687059c | 444 | | expr |
79072805 | 445 | { $$ = $1; } |
a687059c | 446 | | expr IF expr |
b5bbe64a | 447 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 448 | | expr UNLESS expr |
b5bbe64a | 449 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 450 | | expr WHILE expr |
b5bbe64a | 451 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 452 | | expr UNTIL iexpr |
b5bbe64a | 453 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); } |
ecca16b0 | 454 | | expr FOR expr |
94bf0465 | 455 | { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL); |
b5bbe64a | 456 | PL_parser->copline = (line_t)$2; } |
f20dcd76 | 457 | | expr WHEN expr |
3ad73efd | 458 | { $$ = newWHENOP($3, op_scope($1)); } |
79072805 LW |
459 | ; |
460 | ||
891be019 | 461 | /* else and elsif blocks */ |
79072805 | 462 | else : /* NULL */ |
bcabcc50 | 463 | { $$ = (OP*)NULL; } |
55497cff | 464 | | ELSE mblock |
3ad73efd Z |
465 | { |
466 | ($2)->op_flags |= OPf_PARENS; | |
467 | $$ = op_scope($2); | |
f05e27e5 | 468 | } |
417a992d | 469 | | ELSIF '(' mexpr ')' mblock else |
b5bbe64a | 470 | { PL_parser->copline = (line_t)$1; |
3ad73efd Z |
471 | $$ = newCONDOP(0, |
472 | newSTATEOP(OPf_SPECIAL,NULL,$3), | |
473 | op_scope($5), $6); | |
474 | PL_hints |= HINT_BLOCK_SCOPE; | |
f05e27e5 | 475 | } |
79072805 LW |
476 | ; |
477 | ||
891be019 | 478 | /* Continue blocks */ |
79072805 | 479 | cont : /* NULL */ |
bcabcc50 | 480 | { $$ = (OP*)NULL; } |
79072805 | 481 | | CONTINUE block |
b5bbe64a | 482 | { $$ = op_scope($2); } |
79072805 LW |
483 | ; |
484 | ||
a034e688 DM |
485 | /* determine whether there are any new my declarations */ |
486 | mintro : /* NULL */ | |
487 | { $$ = (PL_min_intro_pending && | |
488 | PL_max_intro_pending >= PL_min_intro_pending); | |
489 | intro_my(); } | |
490 | ||
891be019 | 491 | /* Normal expression */ |
8d063cd8 | 492 | nexpr : /* NULL */ |
bcabcc50 | 493 | { $$ = (OP*)NULL; } |
8d063cd8 LW |
494 | | sideff |
495 | ; | |
496 | ||
891be019 | 497 | /* Boolean expression */ |
8d063cd8 | 498 | texpr : /* NULL means true */ |
f05e27e5 DM |
499 | { YYSTYPE tmplval; |
500 | (void)scan_num("1", &tmplval); | |
501 | $$ = tmplval.opval; } | |
8d063cd8 LW |
502 | | expr |
503 | ; | |
504 | ||
891be019 | 505 | /* Inverted boolean expression */ |
55497cff | 506 | iexpr : expr |
507 | { $$ = invert(scalar($1)); } | |
508 | ; | |
509 | ||
891be019 | 510 | /* Expression with its own lexical scope */ |
55497cff | 511 | mexpr : expr |
bbce6d69 | 512 | { $$ = $1; intro_my(); } |
513 | ; | |
514 | ||
515 | mnexpr : nexpr | |
516 | { $$ = $1; intro_my(); } | |
55497cff | 517 | ; |
518 | ||
55497cff | 519 | miexpr : iexpr |
bbce6d69 | 520 | { $$ = $1; intro_my(); } |
55497cff | 521 | ; |
522 | ||
44a8e56a | 523 | formname: WORD { $$ = $1; } |
bcabcc50 | 524 | | /* NULL */ { $$ = (OP*)NULL; } |
8d063cd8 LW |
525 | ; |
526 | ||
fa83b5b6 | 527 | startsub: /* NULL */ /* start a regular subroutine scope */ |
a8ff2fa6 DM |
528 | { $$ = start_subparse(FALSE, 0); |
529 | SAVEFREESV(PL_compcv); } | |
f05e27e5 | 530 | |
28757baa | 531 | ; |
532 | ||
533 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
a8ff2fa6 DM |
534 | { $$ = start_subparse(FALSE, CVf_ANON); |
535 | SAVEFREESV(PL_compcv); } | |
28757baa | 536 | ; |
537 | ||
44a8e56a | 538 | startformsub: /* NULL */ /* start a format subroutine scope */ |
a8ff2fa6 DM |
539 | { $$ = start_subparse(TRUE, 0); |
540 | SAVEFREESV(PL_compcv); } | |
44a8e56a | 541 | ; |
542 | ||
891be019 | 543 | /* Name of a subroutine - must be a bareword, could be special */ |
50278755 | 544 | subname : WORD |
4210d3f1 | 545 | | PRIVATEREF |
a0d0e21e LW |
546 | ; |
547 | ||
891be019 | 548 | /* Subroutine prototype */ |
4633a7c4 | 549 | proto : /* NULL */ |
bcabcc50 | 550 | { $$ = (OP*)NULL; } |
4633a7c4 LW |
551 | | THING |
552 | ; | |
28757baa | 553 | |
891be019 | 554 | /* Optional list of subroutine attributes */ |
09bef843 | 555 | subattrlist: /* NULL */ |
bcabcc50 | 556 | { $$ = (OP*)NULL; } |
09bef843 | 557 | | COLONATTR THING |
b5bbe64a | 558 | { $$ = $2; } |
09bef843 | 559 | | COLONATTR |
b5bbe64a | 560 | { $$ = (OP*)NULL; } |
09bef843 SB |
561 | ; |
562 | ||
891be019 | 563 | /* List of attributes for a "my" variable declaration */ |
09bef843 | 564 | myattrlist: COLONATTR THING |
b5bbe64a | 565 | { $$ = $2; } |
09bef843 | 566 | | COLONATTR |
b5bbe64a | 567 | { $$ = (OP*)NULL; } |
09bef843 SB |
568 | ; |
569 | ||
30d9c59b Z |
570 | /* Optional subroutine signature */ |
571 | subsignature: /* NULL */ { $$ = (OP*)NULL; } | |
572 | | '(' | |
573 | { | |
574 | if (!FEATURE_SIGNATURES_IS_ENABLED) | |
575 | Perl_croak(aTHX_ "Experimental " | |
576 | "subroutine signatures not enabled"); | |
577 | Perl_ck_warner_d(aTHX_ | |
578 | packWARN(WARN_EXPERIMENTAL__SIGNATURES), | |
579 | "The signatures feature is experimental"); | |
580 | $<opval>$ = parse_subsignature(); | |
581 | } | |
582 | ')' | |
583 | { | |
584 | $$ = op_append_list(OP_LINESEQ, $<opval>2, | |
585 | newSTATEOP(0, NULL, sawparens(newNULLLIST()))); | |
586 | PL_parser->expect = XBLOCK; | |
587 | } | |
588 | ; | |
589 | ||
590 | /* Subroutine body - block with optional signature */ | |
591 | realsubbody: remember subsignature '{' stmtseq '}' | |
592 | { | |
b5bbe64a JH |
593 | if (PL_parser->copline > (line_t)$3) |
594 | PL_parser->copline = (line_t)$3; | |
30d9c59b Z |
595 | $$ = block_end($1, |
596 | op_append_list(OP_LINESEQ, $2, $4)); | |
30d9c59b Z |
597 | } |
598 | ; | |
599 | ||
600 | /* Optional subroutine body, for named subroutine declaration */ | |
601 | optsubbody: realsubbody { $$ = $1; } | |
b5bbe64a | 602 | | ';' { $$ = (OP*)NULL; |
53a7735b | 603 | PL_parser->expect = XSTATE; |
f05e27e5 | 604 | } |
8d063cd8 LW |
605 | ; |
606 | ||
891be019 | 607 | /* Ordinary expressions; logical combinations */ |
a0d0e21e | 608 | expr : expr ANDOP expr |
b5bbe64a | 609 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
a0d0e21e | 610 | | expr OROP expr |
b5bbe64a | 611 | { $$ = newLOGOP($2, 0, $1, $3); } |
c963b151 | 612 | | expr DOROP expr |
b5bbe64a | 613 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
09b1cffe | 614 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
615 | ; |
616 | ||
891be019 | 617 | /* Expressions are a list of terms joined by commas */ |
09b1cffe | 618 | listexpr: listexpr ',' |
b5bbe64a | 619 | { $$ = $1; } |
09b1cffe | 620 | | listexpr ',' term |
f05e27e5 | 621 | { |
29522234 | 622 | OP* term = $3; |
2fcb4757 | 623 | $$ = op_append_elem(OP_LIST, $1, term); |
f05e27e5 | 624 | } |
fad39ff1 | 625 | | term %prec PREC_LOW |
8d063cd8 LW |
626 | ; |
627 | ||
891be019 | 628 | /* List operators */ |
09b1cffe | 629 | listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ |
b5bbe64a JH |
630 | { $$ = convert($1, OPf_STACKED, |
631 | op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); | |
f05e27e5 | 632 | } |
891be019 | 633 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
b5bbe64a JH |
634 | { $$ = convert($1, OPf_STACKED, |
635 | op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); | |
f05e27e5 | 636 | } |
417a992d | 637 | | term ARROW method '(' optexpr ')' /* $foo->bar(list) */ |
4633a7c4 | 638 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
639 | op_append_elem(OP_LIST, |
640 | op_prepend_elem(OP_LIST, scalar($1), $5), | |
f05e27e5 | 641 | newUNOP(OP_METHOD, 0, $3))); |
f05e27e5 | 642 | } |
891be019 | 643 | | term ARROW method /* $foo->bar */ |
b1524f17 | 644 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 645 | op_append_elem(OP_LIST, scalar($1), |
f05e27e5 | 646 | newUNOP(OP_METHOD, 0, $3))); |
f05e27e5 | 647 | } |
09b1cffe | 648 | | METHOD indirob optlistexpr /* new Class @args */ |
4633a7c4 | 649 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
650 | op_append_elem(OP_LIST, |
651 | op_prepend_elem(OP_LIST, $2, $3), | |
f05e27e5 DM |
652 | newUNOP(OP_METHOD, 0, $1))); |
653 | } | |
09b1cffe | 654 | | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ |
4633a7c4 | 655 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
656 | op_append_elem(OP_LIST, |
657 | op_prepend_elem(OP_LIST, $2, $4), | |
f05e27e5 | 658 | newUNOP(OP_METHOD, 0, $1))); |
f05e27e5 | 659 | } |
09b1cffe | 660 | | LSTOP optlistexpr /* print @args */ |
b5bbe64a | 661 | { $$ = convert($1, 0, $2); } |
09b1cffe | 662 | | FUNC '(' optexpr ')' /* print (@args) */ |
b5bbe64a | 663 | { $$ = convert($1, 0, $3); } |
718a7425 | 664 | | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ |
5a5094bd | 665 | { SvREFCNT_inc_simple_void(PL_compcv); |
bcabcc50 | 666 | $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } |
09b1cffe | 667 | optlistexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 668 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
669 | op_append_elem(OP_LIST, |
670 | op_prepend_elem(OP_LIST, $<opval>4, $5), $1)); | |
f05e27e5 | 671 | } |
a687059c LW |
672 | ; |
673 | ||
891be019 | 674 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
675 | method : METHOD |
676 | | scalar | |
677 | ; | |
678 | ||
891be019 | 679 | /* Some kind of subscripted expression */ |
89f35911 | 680 | subscripted: gelem '{' expr ';' '}' /* *main::{something} */ |
891be019 SC |
681 | /* In this and all the hash accessors, ';' is |
682 | * provided by the tokeniser */ | |
264e1af3 | 683 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); |
53a7735b | 684 | PL_parser->expect = XOPERATOR; |
f05e27e5 | 685 | } |
891be019 | 686 | | scalar '[' expr ']' /* $array[$element] */ |
f05e27e5 | 687 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); |
f05e27e5 | 688 | } |
891be019 | 689 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
690 | { $$ = newBINOP(OP_AELEM, 0, |
691 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 692 | scalar($4)); |
f05e27e5 | 693 | } |
891be019 | 694 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
695 | { $$ = newBINOP(OP_AELEM, 0, |
696 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 697 | scalar($3)); |
f05e27e5 | 698 | } |
5a63ceef | 699 | | scalar '{' expr ';' '}' /* $foo{bar();} */ |
fad39ff1 | 700 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
53a7735b | 701 | PL_parser->expect = XOPERATOR; |
f05e27e5 | 702 | } |
891be019 | 703 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
704 | { $$ = newBINOP(OP_HELEM, 0, |
705 | ref(newHVREF($1),OP_RV2HV), | |
706 | jmaybe($4)); | |
53a7735b | 707 | PL_parser->expect = XOPERATOR; |
f05e27e5 | 708 | } |
891be019 | 709 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
710 | { $$ = newBINOP(OP_HELEM, 0, |
711 | ref(newHVREF($1),OP_RV2HV), | |
712 | jmaybe($3)); | |
53a7735b | 713 | PL_parser->expect = XOPERATOR; |
f05e27e5 | 714 | } |
891be019 | 715 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 | 716 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 717 | newCVREF(0, scalar($1))); } |
891be019 | 718 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 | 719 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 720 | op_append_elem(OP_LIST, $4, |
b5bbe64a | 721 | newCVREF(0, scalar($1)))); } |
fad39ff1 | 722 | |
417a992d | 723 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 | 724 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 725 | op_append_elem(OP_LIST, $3, |
b5bbe64a | 726 | newCVREF(0, scalar($1)))); } |
417a992d | 727 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 | 728 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 729 | newCVREF(0, scalar($1))); } |
9a9798c2 | 730 | | '(' expr ')' '[' expr ']' /* list slice */ |
b5bbe64a | 731 | { $$ = newSLICEOP(0, $5, $2); } |
ea25a9b2 | 732 | | QWLIST '[' expr ']' /* list literal slice */ |
b5bbe64a | 733 | { $$ = newSLICEOP(0, $3, $1); } |
9a9798c2 | 734 | | '(' ')' '[' expr ']' /* empty list slice! */ |
b5bbe64a | 735 | { $$ = newSLICEOP(0, $4, (OP*)NULL); } |
891be019 | 736 | ; |
fad39ff1 | 737 | |
891be019 | 738 | /* Binary operators between terms */ |
f05e27e5 | 739 | termbinop: term ASSIGNOP term /* $x = $y */ |
b5bbe64a | 740 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 741 | | term POWOP term /* $x ** $y */ |
b5bbe64a | 742 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 743 | | term MULOP term /* $x * $y, $x x $y */ |
b5bbe64a | 744 | { if ($2 != OP_REPEAT) |
79072805 | 745 | scalar($1); |
b5bbe64a | 746 | $$ = newBINOP($2, 0, $1, scalar($3)); |
f05e27e5 | 747 | } |
891be019 | 748 | | term ADDOP term /* $x + $y */ |
b5bbe64a | 749 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 750 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
b5bbe64a | 751 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 752 | | term RELOP term /* $x > $y, etc. */ |
b5bbe64a | 753 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 754 | | term EQOP term /* $x == $y, $x eq $y */ |
b5bbe64a | 755 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 756 | | term BITANDOP term /* $x & $y */ |
b5bbe64a | 757 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 758 | | term BITOROP term /* $x | $y */ |
b5bbe64a | 759 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 760 | | term DOTDOT term /* $x..$y, $x...$y */ |
b5bbe64a | 761 | { $$ = newRANGE($2, scalar($1), scalar($3)); } |
891be019 | 762 | | term ANDAND term /* $x && $y */ |
b5bbe64a | 763 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 764 | | term OROR term /* $x || $y */ |
b5bbe64a | 765 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 | 766 | | term DORDOR term /* $x // $y */ |
b5bbe64a | 767 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
891be019 | 768 | | term MATCHOP term /* $x =~ /$y/ */ |
b5bbe64a | 769 | { $$ = bind_match($2, $1, $3); } |
891be019 | 770 | ; |
8d063cd8 | 771 | |
891be019 SC |
772 | /* Unary operators and terms */ |
773 | termunop : '-' term %prec UMINUS /* -$x */ | |
b5bbe64a | 774 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 775 | | '+' term %prec UMINUS /* +$x */ |
b5bbe64a JH |
776 | { $$ = $2; } |
777 | ||
891be019 | 778 | | '!' term /* !$x */ |
b5bbe64a | 779 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 780 | | '~' term /* ~$x */ |
b5bbe64a | 781 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2)); } |
891be019 | 782 | | term POSTINC /* $x++ */ |
79072805 | 783 | { $$ = newUNOP(OP_POSTINC, 0, |
b5bbe64a | 784 | op_lvalue(scalar($1), OP_POSTINC)); } |
891be019 | 785 | | term POSTDEC /* $x-- */ |
79072805 | 786 | { $$ = newUNOP(OP_POSTDEC, 0, |
b5bbe64a | 787 | op_lvalue(scalar($1), OP_POSTDEC));} |
cc624add FC |
788 | | term POSTJOIN /* implicit join after interpolated ->@ */ |
789 | { $$ = convert(OP_JOIN, 0, | |
790 | op_append_elem( | |
791 | OP_LIST, | |
792 | newSVREF(scalar( | |
793 | newSVOP(OP_CONST,0, | |
794 | newSVpvs("\"")) | |
795 | )), | |
796 | $1 | |
797 | )); | |
cc624add | 798 | } |
891be019 | 799 | | PREINC term /* ++$x */ |
79072805 | 800 | { $$ = newUNOP(OP_PREINC, 0, |
b5bbe64a | 801 | op_lvalue(scalar($2), OP_PREINC)); } |
891be019 | 802 | | PREDEC term /* --$x */ |
79072805 | 803 | { $$ = newUNOP(OP_PREDEC, 0, |
b5bbe64a | 804 | op_lvalue(scalar($2), OP_PREDEC)); } |
891be019 SC |
805 | |
806 | ; | |
807 | ||
808 | /* Constructors for anonymous data */ | |
809 | anonymous: '[' expr ']' | |
b5bbe64a | 810 | { $$ = newANONLIST($2); } |
891be019 | 811 | | '[' ']' |
b5bbe64a | 812 | { $$ = newANONLIST((OP*)NULL);} |
891be019 | 813 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ |
b5bbe64a | 814 | { $$ = newANONHASH($2); } |
891be019 | 815 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
b5bbe64a | 816 | { $$ = newANONHASH((OP*)NULL); } |
30d9c59b | 817 | | ANONSUB startanonsub proto subattrlist realsubbody %prec '(' |
5a5094bd | 818 | { SvREFCNT_inc_simple_void(PL_compcv); |
b5bbe64a | 819 | $$ = newANONATTRSUB($2, $3, $4, $5); } |
891be019 SC |
820 | |
821 | ; | |
822 | ||
823 | /* Things called with "do" */ | |
824 | termdo : DO term %prec UNIOP /* do $filename */ | |
b5bbe64a | 825 | { $$ = dofile($2, $1);} |
891be019 | 826 | | DO block %prec '(' /* do { code */ |
b5bbe64a | 827 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));} |
891be019 SC |
828 | ; |
829 | ||
830 | term : termbinop | |
831 | | termunop | |
832 | | anonymous | |
833 | | termdo | |
e9bdcc27 | 834 | | term '?' term ':' term |
b5bbe64a | 835 | { $$ = newCONDOP(0, $1, $3, $5); } |
891be019 | 836 | | REFGEN term /* \$x, \@y, \%z */ |
b5bbe64a | 837 | { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN)); } |
09bef843 SB |
838 | | myattrterm %prec UNIOP |
839 | { $$ = $1; } | |
840 | | LOCAL term %prec UNIOP | |
b5bbe64a | 841 | { $$ = localize($2,$1); } |
a0d0e21e | 842 | | '(' expr ')' |
b5bbe64a | 843 | { $$ = sawparens($2); } |
ea25a9b2 | 844 | | QWLIST |
b5bbe64a | 845 | { $$ = $1; } |
8d063cd8 | 846 | | '(' ')' |
b5bbe64a | 847 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 848 | | scalar %prec '(' |
8d063cd8 | 849 | { $$ = $1; } |
79072805 | 850 | | star %prec '(' |
8d063cd8 | 851 | { $$ = $1; } |
79072805 | 852 | | hsh %prec '(' |
8d063cd8 | 853 | { $$ = $1; } |
79072805 | 854 | | ary %prec '(' |
8d063cd8 | 855 | { $$ = $1; } |
891be019 | 856 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 857 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
858 | | subscripted |
859 | { $$ = $1; } | |
89f35911 | 860 | | sliceme '[' expr ']' /* array slice */ |
2fcb4757 | 861 | { $$ = op_prepend_elem(OP_ASLICE, |
79072805 | 862 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
863 | newLISTOP(OP_ASLICE, 0, |
864 | list($3), | |
f05e27e5 | 865 | ref($1, OP_ASLICE))); |
429a2555 FC |
866 | if ($$ && $1) |
867 | $$->op_private |= | |
868 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 869 | } |
76eba8ab | 870 | | kvslice '[' expr ']' /* array key/value slice */ |
6dd3e0f2 RZ |
871 | { $$ = op_prepend_elem(OP_KVASLICE, |
872 | newOP(OP_PUSHMARK, 0), | |
873 | newLISTOP(OP_KVASLICE, 0, | |
874 | list($3), | |
875 | ref(oopsAV($1), OP_KVASLICE))); | |
95a31aad FC |
876 | if ($$ && $1) |
877 | $$->op_private |= | |
878 | $1->op_private & OPpSLICEWARNING; | |
6dd3e0f2 | 879 | } |
89f35911 | 880 | | sliceme '{' expr ';' '}' /* @hash{@keys} */ |
2fcb4757 | 881 | { $$ = op_prepend_elem(OP_HSLICE, |
79072805 | 882 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
883 | newLISTOP(OP_HSLICE, 0, |
884 | list($3), | |
a0d0e21e | 885 | ref(oopsHV($1), OP_HSLICE))); |
429a2555 FC |
886 | if ($$ && $1) |
887 | $$->op_private |= | |
888 | $1->op_private & OPpSLICEWARNING; | |
53a7735b | 889 | PL_parser->expect = XOPERATOR; |
f05e27e5 | 890 | } |
76eba8ab | 891 | | kvslice '{' expr ';' '}' /* %hash{@keys} */ |
5cae3edb RZ |
892 | { $$ = op_prepend_elem(OP_KVHSLICE, |
893 | newOP(OP_PUSHMARK, 0), | |
894 | newLISTOP(OP_KVHSLICE, 0, | |
895 | list($3), | |
896 | ref($1, OP_KVHSLICE))); | |
95a31aad FC |
897 | if ($$ && $1) |
898 | $$->op_private |= | |
899 | $1->op_private & OPpSLICEWARNING; | |
5cae3edb | 900 | PL_parser->expect = XOPERATOR; |
5cae3edb | 901 | } |
79072805 LW |
902 | | THING %prec '(' |
903 | { $$ = $1; } | |
891be019 | 904 | | amper /* &foo; */ |
c07a80fd | 905 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
fb602e32 | 906 | | amper '(' ')' /* &foo() or foo() */ |
f05e27e5 | 907 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); |
f05e27e5 | 908 | } |
fb602e32 | 909 | | amper '(' expr ')' /* &foo(@args) or foo(@args) */ |
f05e27e5 DM |
910 | { |
911 | $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, | |
2fcb4757 | 912 | op_append_elem(OP_LIST, $3, scalar($1))); |
f05e27e5 | 913 | } |
fb602e32 | 914 | | NOAMP subname optlistexpr /* foo @args (no parens) */ |
a0d0e21e | 915 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 916 | op_append_elem(OP_LIST, $3, scalar($2))); |
f05e27e5 | 917 | } |
89f35911 | 918 | | term ARROW '$' '*' |
b5bbe64a | 919 | { $$ = newSVREF($1); } |
89f35911 | 920 | | term ARROW '@' '*' |
b5bbe64a | 921 | { $$ = newAVREF($1); } |
89f35911 | 922 | | term ARROW '%' '*' |
b5bbe64a | 923 | { $$ = newHVREF($1); } |
89f35911 FC |
924 | | term ARROW '&' '*' |
925 | { $$ = newUNOP(OP_ENTERSUB, 0, | |
b5bbe64a | 926 | scalar(newCVREF($3,$1))); } |
89f35911 | 927 | | term ARROW '*' '*' %prec '(' |
b5bbe64a | 928 | { $$ = newGVREF(0,$1); } |
891be019 | 929 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
b5bbe64a JH |
930 | { $$ = newOP($1, OPf_SPECIAL); |
931 | PL_hints |= HINT_BLOCK_SCOPE; } | |
a0d0e21e | 932 | | LOOPEX term |
b5bbe64a | 933 | { $$ = newLOOPEX($1,$2); } |
09b1cffe | 934 | | NOTOP listexpr /* not $foo */ |
b5bbe64a | 935 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 936 | | UNIOP /* Unary op, $_ implied */ |
b5bbe64a | 937 | { $$ = newOP($1, 0); } |
f05e27e5 | 938 | | UNIOP block /* eval { foo }* */ |
b5bbe64a | 939 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 940 | | UNIOP term /* Unary op */ |
b5bbe64a | 941 | { $$ = newUNOP($1, 0, $2); } |
d2fdf8fd | 942 | | REQUIRE /* require, $_ implied */ |
b5bbe64a | 943 | { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); } |
d2fdf8fd | 944 | | REQUIRE term /* require Foo */ |
b5bbe64a | 945 | { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); } |
3cd0a11a RGS |
946 | | UNIOPSUB |
947 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | |
891be019 | 948 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 | 949 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 950 | op_append_elem(OP_LIST, $2, scalar($1))); } |
891be019 | 951 | | FUNC0 /* Nullary operator */ |
b5bbe64a | 952 | { $$ = newOP($1, 0); } |
ae986130 | 953 | | FUNC0 '(' ')' |
b5bbe64a | 954 | { $$ = newOP($1, 0);} |
7eb971ee FC |
955 | | FUNC0OP /* Same as above, but op created in toke.c */ |
956 | { $$ = $1; } | |
957 | | FUNC0OP '(' ')' | |
b5bbe64a | 958 | { $$ = $1; } |
891be019 | 959 | | FUNC0SUB /* Sub treated as nullop */ |
b5bbe64a | 960 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 961 | | FUNC1 '(' ')' /* not () */ |
b5bbe64a JH |
962 | { $$ = ($1 == OP_NOT) |
963 | ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) | |
964 | : newOP($1, OPf_SPECIAL); } | |
891be019 | 965 | | FUNC1 '(' expr ')' /* not($foo) */ |
b5bbe64a | 966 | { $$ = newUNOP($1, 0, $3); } |
d63c20f2 DM |
967 | | PMFUNC /* m//, s///, qr//, tr/// */ |
968 | { | |
969 | if ( $1->op_type != OP_TRANS | |
970 | && $1->op_type != OP_TRANSR | |
971 | && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV)) | |
972 | { | |
973 | $<ival>$ = start_subparse(FALSE, CVf_ANON); | |
974 | SAVEFREESV(PL_compcv); | |
975 | } else | |
976 | $<ival>$ = 0; | |
977 | } | |
978 | '(' listexpr ')' | |
b5bbe64a | 979 | { $$ = pmruntime($1, $4, 1, $<ival>2); } |
79072805 | 980 | | WORD |
378cc40b | 981 | | listop |
be25f609 | 982 | | YADAYADA |
983 | { | |
984 | $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0), | |
985 | newSVOP(OP_CONST, 0, newSVpvs("Unimplemented"))); | |
986 | } | |
88e1f1a2 | 987 | | PLUGEXPR |
8d063cd8 LW |
988 | ; |
989 | ||
891be019 | 990 | /* "my" declarations, with optional attributes */ |
09bef843 | 991 | myattrterm: MY myterm myattrlist |
b5bbe64a | 992 | { $$ = my_attrs($2,$3); } |
09bef843 | 993 | | MY myterm |
b5bbe64a | 994 | { $$ = localize($2,$1); } |
09bef843 SB |
995 | ; |
996 | ||
891be019 | 997 | /* Things that can be "my"'d */ |
09bef843 | 998 | myterm : '(' expr ')' |
b5bbe64a | 999 | { $$ = sawparens($2); } |
09bef843 | 1000 | | '(' ')' |
b5bbe64a JH |
1001 | { $$ = sawparens(newNULLLIST()); } |
1002 | ||
09bef843 SB |
1003 | | scalar %prec '(' |
1004 | { $$ = $1; } | |
1005 | | hsh %prec '(' | |
1006 | { $$ = $1; } | |
1007 | | ary %prec '(' | |
1008 | { $$ = $1; } | |
1009 | ; | |
1010 | ||
891be019 | 1011 | /* Basic list expressions */ |
09b1cffe | 1012 | optlistexpr: /* NULL */ %prec PREC_LOW |
bcabcc50 | 1013 | { $$ = (OP*)NULL; } |
09b1cffe | 1014 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
1015 | { $$ = $1; } |
1016 | ; | |
1017 | ||
09b1cffe | 1018 | optexpr: /* NULL */ |
bcabcc50 | 1019 | { $$ = (OP*)NULL; } |
79072805 LW |
1020 | | expr |
1021 | { $$ = $1; } | |
1022 | ; | |
1023 | ||
891be019 SC |
1024 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
1025 | lexical */ | |
55497cff | 1026 | my_scalar: scalar |
12bd6ede | 1027 | { PL_parser->in_my = 0; $$ = my($1); } |
55497cff | 1028 | ; |
1029 | ||
79072805 | 1030 | amper : '&' indirob |
b5bbe64a | 1031 | { $$ = newCVREF($1,$2); } |
a687059c LW |
1032 | ; |
1033 | ||
79072805 | 1034 | scalar : '$' indirob |
b5bbe64a | 1035 | { $$ = newSVREF($2); } |
a687059c LW |
1036 | ; |
1037 | ||
79072805 | 1038 | ary : '@' indirob |
f05e27e5 | 1039 | { $$ = newAVREF($2); |
b5bbe64a | 1040 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1041 | } |
79072805 LW |
1042 | ; |
1043 | ||
1044 | hsh : '%' indirob | |
f05e27e5 | 1045 | { $$ = newHVREF($2); |
b5bbe64a | 1046 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1047 | } |
79072805 LW |
1048 | ; |
1049 | ||
1050 | arylen : DOLSHARP indirob | |
b5bbe64a | 1051 | { $$ = newAVREF($2); } |
ff25e5db | 1052 | | term ARROW DOLSHARP '*' |
b5bbe64a | 1053 | { $$ = newAVREF($1); } |
79072805 LW |
1054 | ; |
1055 | ||
1056 | star : '*' indirob | |
b5bbe64a | 1057 | { $$ = newGVREF(0,$2); } |
79072805 LW |
1058 | ; |
1059 | ||
89f35911 FC |
1060 | sliceme : ary |
1061 | | term ARROW '@' | |
b5bbe64a | 1062 | { $$ = newAVREF($1); } |
89f35911 FC |
1063 | ; |
1064 | ||
76eba8ab FC |
1065 | kvslice : hsh |
1066 | | term ARROW '%' | |
b5bbe64a | 1067 | { $$ = newHVREF($1); } |
76eba8ab FC |
1068 | ; |
1069 | ||
89f35911 FC |
1070 | gelem : star |
1071 | | term ARROW '*' | |
b5bbe64a | 1072 | { $$ = newGVREF(0,$1); } |
89f35911 FC |
1073 | ; |
1074 | ||
891be019 | 1075 | /* Indirect objects */ |
79072805 LW |
1076 | indirob : WORD |
1077 | { $$ = scalar($1); } | |
fad39ff1 | 1078 | | scalar %prec PREC_LOW |
f05e27e5 | 1079 | { $$ = scalar($1); } |
79072805 | 1080 | | block |
3ad73efd | 1081 | { $$ = op_scope($1); } |
79072805 | 1082 | |
93a17b20 LW |
1083 | | PRIVATEREF |
1084 | { $$ = $1; } | |
8d063cd8 | 1085 | ; |