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 | |
d39c26a6 FC |
74 | %type <opval> formname subname proto optsubbody cont my_scalar my_var |
75 | %type <opval> refgen_topic formblock | |
f05e27e5 | 76 | %type <opval> subattrlist myattrlist myattrterm myterm |
30d9c59b | 77 | %type <opval> realsubbody subsignature termbinop termunop anonymous termdo |
705fe0e5 | 78 | %type <opval> formstmtseq formline formarg |
79072805 | 79 | |
b5bbe64a | 80 | %nonassoc <ival> PREC_LOW |
fad39ff1 SM |
81 | %nonassoc LOOPEX |
82 | ||
b5bbe64a JH |
83 | %left <ival> OROP DOROP |
84 | %left <ival> ANDOP | |
85 | %right <ival> NOTOP | |
36477c24 | 86 | %nonassoc LSTOP LSTOPSUB |
b5bbe64a JH |
87 | %left <ival> ',' |
88 | %right <ival> ASSIGNOP | |
89 | %right <ival> '?' ':' | |
be25f609 | 90 | %nonassoc DOTDOT YADAYADA |
b5bbe64a JH |
91 | %left <ival> OROR DORDOR |
92 | %left <ival> ANDAND | |
93 | %left <ival> BITOROP | |
94 | %left <ival> BITANDOP | |
a687059c LW |
95 | %nonassoc EQOP |
96 | %nonassoc RELOP | |
36477c24 | 97 | %nonassoc UNIOP UNIOPSUB |
20515881 | 98 | %nonassoc REQUIRE |
b5bbe64a | 99 | %left <ival> SHIFTOP |
a687059c LW |
100 | %left ADDOP |
101 | %left MULOP | |
b5bbe64a JH |
102 | %left <ival> MATCHOP |
103 | %right <ival> '!' '~' UMINUS REFGEN | |
104 | %right <ival> POWOP | |
105 | %nonassoc <ival> PREINC PREDEC POSTINC POSTDEC POSTJOIN | |
106 | %left <ival> ARROW | |
107 | %nonassoc <ival> ')' | |
108 | %left <ival> '(' | |
fad39ff1 | 109 | %left '[' '{' |
8d063cd8 LW |
110 | |
111 | %% /* RULES */ | |
112 | ||
28ac2b49 | 113 | /* Top-level choice of what kind of thing yyparse was called to parse */ |
727a8fe5 Z |
114 | grammar : GRAMPROG |
115 | { | |
624fa8bd | 116 | parser->expect = XSTATE; |
727a8fe5 Z |
117 | } |
118 | remember stmtseq | |
119 | { | |
120 | newPROG(block_end($3,$4)); | |
8635e3c2 | 121 | PL_compiling.cop_seq = 0; |
727a8fe5 Z |
122 | $$ = 0; |
123 | } | |
78cdf107 Z |
124 | | GRAMEXPR |
125 | { | |
126 | parser->expect = XTERM; | |
127 | } | |
09b1cffe | 128 | optexpr |
78cdf107 Z |
129 | { |
130 | PL_eval_root = $3; | |
131 | $$ = 0; | |
132 | } | |
e53d8f76 Z |
133 | | GRAMBLOCK |
134 | { | |
135 | parser->expect = XBLOCK; | |
136 | } | |
137 | block | |
138 | { | |
5f211341 | 139 | PL_pad_reset_pending = TRUE; |
8359b381 Z |
140 | PL_eval_root = $3; |
141 | $$ = 0; | |
142 | yyunlex(); | |
143 | parser->yychar = YYEOF; | |
144 | } | |
145 | | GRAMBARESTMT | |
146 | { | |
147 | parser->expect = XSTATE; | |
148 | } | |
149 | barestmt | |
150 | { | |
151 | PL_pad_reset_pending = TRUE; | |
e53d8f76 Z |
152 | PL_eval_root = $3; |
153 | $$ = 0; | |
154 | yyunlex(); | |
155 | parser->yychar = YYEOF; | |
156 | } | |
9eb5c532 | 157 | | GRAMFULLSTMT |
28ac2b49 | 158 | { |
9eb5c532 Z |
159 | parser->expect = XSTATE; |
160 | } | |
161 | fullstmt | |
162 | { | |
5f211341 | 163 | PL_pad_reset_pending = TRUE; |
9eb5c532 | 164 | PL_eval_root = $3; |
28ac2b49 Z |
165 | $$ = 0; |
166 | yyunlex(); | |
167 | parser->yychar = YYEOF; | |
168 | } | |
07ffcb73 Z |
169 | | GRAMSTMTSEQ |
170 | { | |
171 | parser->expect = XSTATE; | |
172 | } | |
5f211341 | 173 | stmtseq |
07ffcb73 Z |
174 | { |
175 | PL_eval_root = $3; | |
176 | $$ = 0; | |
177 | } | |
178 | ; | |
179 | ||
891be019 | 180 | /* An ordinary block */ |
5f211341 | 181 | block : '{' remember stmtseq '}' |
624fa8bd FC |
182 | { if (parser->copline > (line_t)$1) |
183 | parser->copline = (line_t)$1; | |
f05e27e5 | 184 | $$ = block_end($2, $3); |
f05e27e5 | 185 | } |
a0d0e21e LW |
186 | ; |
187 | ||
7c70caa5 | 188 | /* format body */ |
705fe0e5 | 189 | formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.' |
624fa8bd FC |
190 | { if (parser->copline > (line_t)$1) |
191 | parser->copline = (line_t)$1; | |
705fe0e5 | 192 | $$ = block_end($2, $5); |
7c70caa5 FC |
193 | } |
194 | ; | |
195 | ||
55497cff | 196 | remember: /* NULL */ /* start a full lexical scope */ |
34b54951 FC |
197 | { $$ = block_start(TRUE); |
198 | parser->parsed_sub = 0; } | |
55497cff | 199 | ; |
200 | ||
5f211341 | 201 | mblock : '{' mremember stmtseq '}' |
624fa8bd FC |
202 | { if (parser->copline > (line_t)$1) |
203 | parser->copline = (line_t)$1; | |
f05e27e5 | 204 | $$ = block_end($2, $3); |
f05e27e5 | 205 | } |
55497cff | 206 | ; |
207 | ||
208 | mremember: /* NULL */ /* start a partial lexical scope */ | |
34b54951 FC |
209 | { $$ = block_start(FALSE); |
210 | parser->parsed_sub = 0; } | |
8d063cd8 LW |
211 | ; |
212 | ||
eae48c89 | 213 | /* A sequence of statements in the program */ |
5f211341 | 214 | stmtseq : /* NULL */ |
bcabcc50 | 215 | { $$ = (OP*)NULL; } |
5f211341 | 216 | | stmtseq fullstmt |
2fcb4757 | 217 | { $$ = op_append_list(OP_LINESEQ, $1, $2); |
3280af22 | 218 | PL_pad_reset_pending = TRUE; |
503de470 DM |
219 | if ($1 && $2) |
220 | PL_hints |= HINT_BLOCK_SCOPE; | |
221 | } | |
8d063cd8 LW |
222 | ; |
223 | ||
705fe0e5 FC |
224 | /* A sequence of format lines */ |
225 | formstmtseq: /* NULL */ | |
226 | { $$ = (OP*)NULL; } | |
227 | | formstmtseq formline | |
228 | { $$ = op_append_list(OP_LINESEQ, $1, $2); | |
229 | PL_pad_reset_pending = TRUE; | |
230 | if ($1 && $2) | |
231 | PL_hints |= HINT_BLOCK_SCOPE; | |
232 | } | |
233 | ; | |
234 | ||
8e720305 Z |
235 | /* A statement in the program, including optional labels */ |
236 | fullstmt: barestmt | |
eae48c89 | 237 | { |
b5bbe64a | 238 | $$ = $1 ? newSTATEOP(0, NULL, $1) : NULL; |
eae48c89 | 239 | } |
8e720305 Z |
240 | | labfullstmt |
241 | { $$ = $1; } | |
242 | ; | |
243 | ||
244 | labfullstmt: LABEL barestmt | |
245 | { | |
b5bbe64a | 246 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 Z |
247 | } |
248 | | LABEL labfullstmt | |
249 | { | |
b5bbe64a | 250 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 | 251 | } |
eae48c89 Z |
252 | ; |
253 | ||
254 | /* A bare statement, lacking label and other aspects of state op */ | |
255 | barestmt: PLUGSTMT | |
0d863452 | 256 | { $$ = $1; } |
7c70caa5 | 257 | | FORMAT startformsub formname formblock |
f05e27e5 | 258 | { |
eae48c89 | 259 | CV *fmtcv = PL_compcv; |
eae48c89 Z |
260 | newFORM($2, $3, $4); |
261 | $$ = (OP*)NULL; | |
4a273b91 | 262 | if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) { |
eae48c89 | 263 | SvREFCNT_inc_simple_void(fmtcv); |
cc76b5cc | 264 | pad_add_anon(fmtcv, OP_NULL); |
f05e27e5 | 265 | } |
8b9fb2f9 | 266 | parser->parsed_sub = 1; |
eae48c89 | 267 | } |
50278755 FC |
268 | | SUB subname startsub |
269 | { | |
270 | if ($2->op_type == OP_CONST) { | |
271 | const char *const name = | |
272 | SvPV_nolen_const(((SVOP*)$2)->op_sv); | |
273 | if (strEQ(name, "BEGIN") || strEQ(name, "END") | |
764212cf FC |
274 | || strEQ(name, "INIT") || strEQ(name, "CHECK") |
275 | || strEQ(name, "UNITCHECK")) | |
276 | CvSPECIAL_on(PL_compcv); | |
50278755 | 277 | } |
e07561e6 FC |
278 | else |
279 | /* State subs inside anonymous subs need to be | |
280 | clonable themselves. */ | |
6d5c2147 FC |
281 | if (CvANON(CvOUTSIDE(PL_compcv)) |
282 | || CvCLONE(CvOUTSIDE(PL_compcv)) | |
283 | || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST( | |
284 | CvOUTSIDE(PL_compcv) | |
285 | ))[$2->op_targ])) | |
e07561e6 | 286 | CvCLONE_on(PL_compcv); |
624fa8bd FC |
287 | parser->in_my = 0; |
288 | parser->in_my_stash = NULL; | |
764212cf | 289 | } |
30d9c59b | 290 | proto subattrlist optsubbody |
eae48c89 Z |
291 | { |
292 | SvREFCNT_inc_simple_void(PL_compcv); | |
50278755 FC |
293 | $2->op_type == OP_CONST |
294 | ? newATTRSUB($3, $2, $5, $6, $7) | |
295 | : newMYSUB($3, $2, $5, $6, $7) | |
50278755 | 296 | ; |
eae48c89 | 297 | $$ = (OP*)NULL; |
764212cf | 298 | intro_my(); |
34b54951 | 299 | parser->parsed_sub = 1; |
f05e27e5 | 300 | } |
eae48c89 | 301 | | PACKAGE WORD WORD ';' |
5f211341 | 302 | { |
eae48c89 Z |
303 | package($3); |
304 | if ($2) | |
305 | package_version($2); | |
306 | $$ = (OP*)NULL; | |
eae48c89 Z |
307 | } |
308 | | USE startsub | |
309 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } | |
09b1cffe | 310 | WORD WORD optlistexpr ';' |
eae48c89 Z |
311 | { |
312 | SvREFCNT_inc_simple_void(PL_compcv); | |
b5bbe64a | 313 | utilize($1, $2, $4, $5, $6); |
34b54951 | 314 | parser->parsed_sub = 1; |
eae48c89 | 315 | $$ = (OP*)NULL; |
eae48c89 | 316 | } |
417a992d | 317 | | IF '(' remember mexpr ')' mblock else |
eae48c89 | 318 | { |
3ad73efd Z |
319 | $$ = block_end($3, |
320 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 321 | parser->copline = (line_t)$1; |
eae48c89 | 322 | } |
417a992d | 323 | | UNLESS '(' remember miexpr ')' mblock else |
eae48c89 | 324 | { |
3ad73efd Z |
325 | $$ = block_end($3, |
326 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 327 | parser->copline = (line_t)$1; |
eae48c89 | 328 | } |
b5a64814 | 329 | | GIVEN '(' remember mexpr ')' mblock |
eae48c89 | 330 | { |
b5a64814 | 331 | const PADOFFSET offset = pad_findmy_pvs("$_", 0); |
eae48c89 | 332 | $$ = block_end($3, |
b5a64814 FC |
333 | newGIVENOP($4, op_scope($6), |
334 | offset == NOT_IN_PAD | |
335 | || PAD_COMPNAME_FLAGS_isOUR(offset) | |
336 | ? 0 | |
337 | : offset)); | |
624fa8bd | 338 | parser->copline = (line_t)$1; |
eae48c89 | 339 | } |
417a992d | 340 | | WHEN '(' remember mexpr ')' mblock |
3ad73efd | 341 | { $$ = block_end($3, newWHENOP($4, op_scope($6))); } |
eae48c89 | 342 | | DEFAULT block |
3ad73efd | 343 | { $$ = newWHENOP(0, op_scope($2)); } |
417a992d | 344 | | WHILE '(' remember texpr ')' mintro mblock cont |
eae48c89 Z |
345 | { |
346 | $$ = block_end($3, | |
347 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 348 | $4, $7, $8, $6)); |
624fa8bd | 349 | parser->copline = (line_t)$1; |
eae48c89 | 350 | } |
417a992d | 351 | | UNTIL '(' remember iexpr ')' mintro mblock cont |
eae48c89 Z |
352 | { |
353 | $$ = block_end($3, | |
94bf0465 Z |
354 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
355 | $4, $7, $8, $6)); | |
624fa8bd | 356 | parser->copline = (line_t)$1; |
eae48c89 | 357 | } |
2d0e3c96 FC |
358 | | FOR '(' remember mnexpr ';' |
359 | { parser->expect = XTERM; } | |
360 | texpr ';' | |
361 | { parser->expect = XTERM; } | |
362 | mintro mnexpr ')' | |
eae48c89 Z |
363 | mblock |
364 | { | |
b5bbe64a | 365 | OP *initop = $4; |
eae48c89 | 366 | OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
2d0e3c96 | 367 | scalar($7), $13, $11, $10); |
eae48c89 Z |
368 | if (initop) { |
369 | forop = op_prepend_elem(OP_LINESEQ, initop, | |
370 | op_append_elem(OP_LINESEQ, | |
371 | newOP(OP_UNSTACK, OPf_SPECIAL), | |
372 | forop)); | |
5f211341 | 373 | } |
0f602692 | 374 | PL_hints |= HINT_BLOCK_SCOPE; |
eae48c89 | 375 | $$ = block_end($3, forop); |
624fa8bd | 376 | parser->copline = (line_t)$1; |
eae48c89 | 377 | } |
417a992d | 378 | | FOR MY remember my_scalar '(' mexpr ')' mblock cont |
eae48c89 | 379 | { |
94bf0465 | 380 | $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); |
624fa8bd | 381 | parser->copline = (line_t)$1; |
eae48c89 | 382 | } |
417a992d | 383 | | FOR scalar '(' remember mexpr ')' mblock cont |
eae48c89 | 384 | { |
94bf0465 | 385 | $$ = block_end($4, newFOROP(0, |
3ad73efd | 386 | op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); |
624fa8bd | 387 | parser->copline = (line_t)$1; |
eae48c89 | 388 | } |
d39c26a6 FC |
389 | | FOR REFGEN MY remember my_var |
390 | { parser->in_my = 0; $<opval>$ = my($5); } | |
391 | '(' mexpr ')' mblock cont | |
392 | { | |
393 | $$ = block_end( | |
394 | $4, | |
395 | newFOROP(0, | |
396 | op_lvalue( | |
397 | newUNOP(OP_REFGEN, 0, | |
96801525 | 398 | $<opval>6), |
d39c26a6 FC |
399 | OP_ENTERLOOP), |
400 | $8, $10, $11) | |
401 | ); | |
402 | parser->copline = (line_t)$1; | |
403 | } | |
404 | | FOR REFGEN refgen_topic '(' remember mexpr ')' mblock cont | |
405 | { | |
406 | $$ = block_end($5, newFOROP( | |
407 | 0, op_lvalue(newUNOP(OP_REFGEN, 0, | |
96801525 | 408 | $3), |
d39c26a6 FC |
409 | OP_ENTERLOOP), $6, $8, $9)); |
410 | parser->copline = (line_t)$1; | |
411 | } | |
417a992d | 412 | | FOR '(' remember mexpr ')' mblock cont |
eae48c89 Z |
413 | { |
414 | $$ = block_end($3, | |
94bf0465 | 415 | newFOROP(0, (OP*)NULL, $4, $6, $7)); |
624fa8bd | 416 | parser->copline = (line_t)$1; |
eae48c89 Z |
417 | } |
418 | | block cont | |
419 | { | |
420 | /* a block is a loop that happens once */ | |
421 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 422 | (OP*)NULL, $1, $2, 0); |
eae48c89 Z |
423 | } |
424 | | PACKAGE WORD WORD '{' remember | |
425 | { | |
eae48c89 | 426 | package($3); |
eae48c89 | 427 | if ($2) { |
eae48c89 | 428 | package_version($2); |
eae48c89 Z |
429 | } |
430 | } | |
431 | stmtseq '}' | |
432 | { | |
433 | /* a block is a loop that happens once */ | |
94bf0465 | 434 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
eae48c89 | 435 | (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); |
624fa8bd FC |
436 | if (parser->copline > (line_t)$4) |
437 | parser->copline = (line_t)$4; | |
eae48c89 Z |
438 | } |
439 | | sideff ';' | |
440 | { | |
eae48c89 | 441 | $$ = $1; |
eae48c89 Z |
442 | } |
443 | | ';' | |
444 | { | |
b5bbe64a | 445 | $$ = (OP*)NULL; |
624fa8bd | 446 | parser->copline = NOLINE; |
5f211341 | 447 | } |
8d063cd8 LW |
448 | ; |
449 | ||
705fe0e5 FC |
450 | /* Format line */ |
451 | formline: THING formarg | |
452 | { OP *list; | |
453 | if ($2) { | |
454 | OP *term = $2; | |
705fe0e5 FC |
455 | list = op_append_elem(OP_LIST, $1, term); |
456 | } | |
457 | else { | |
705fe0e5 | 458 | list = $1; |
705fe0e5 | 459 | } |
624fa8bd FC |
460 | if (parser->copline == NOLINE) |
461 | parser->copline = CopLINE(PL_curcop)-1; | |
462 | else parser->copline--; | |
705fe0e5 | 463 | $$ = newSTATEOP(0, NULL, |
03d05f6e | 464 | op_convert_list(OP_FORMLINE, 0, list)); |
705fe0e5 FC |
465 | } |
466 | ; | |
467 | ||
468 | formarg : /* NULL */ | |
469 | { $$ = NULL; } | |
470 | | FORMLBRACK stmtseq FORMRBRACK | |
471 | { $$ = op_unscope($2); } | |
472 | ; | |
473 | ||
891be019 | 474 | /* An expression which may have a side-effect */ |
a687059c | 475 | sideff : error |
bcabcc50 | 476 | { $$ = (OP*)NULL; } |
a687059c | 477 | | expr |
79072805 | 478 | { $$ = $1; } |
a687059c | 479 | | expr IF expr |
b5bbe64a | 480 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 481 | | expr UNLESS expr |
b5bbe64a | 482 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 483 | | expr WHILE expr |
b5bbe64a | 484 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 485 | | expr UNTIL iexpr |
b5bbe64a | 486 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); } |
ecca16b0 | 487 | | expr FOR expr |
94bf0465 | 488 | { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL); |
624fa8bd | 489 | parser->copline = (line_t)$2; } |
f20dcd76 | 490 | | expr WHEN expr |
3ad73efd | 491 | { $$ = newWHENOP($3, op_scope($1)); } |
79072805 LW |
492 | ; |
493 | ||
891be019 | 494 | /* else and elsif blocks */ |
79072805 | 495 | else : /* NULL */ |
bcabcc50 | 496 | { $$ = (OP*)NULL; } |
55497cff | 497 | | ELSE mblock |
3ad73efd Z |
498 | { |
499 | ($2)->op_flags |= OPf_PARENS; | |
500 | $$ = op_scope($2); | |
f05e27e5 | 501 | } |
417a992d | 502 | | ELSIF '(' mexpr ')' mblock else |
624fa8bd | 503 | { parser->copline = (line_t)$1; |
3ad73efd Z |
504 | $$ = newCONDOP(0, |
505 | newSTATEOP(OPf_SPECIAL,NULL,$3), | |
506 | op_scope($5), $6); | |
507 | PL_hints |= HINT_BLOCK_SCOPE; | |
f05e27e5 | 508 | } |
79072805 LW |
509 | ; |
510 | ||
891be019 | 511 | /* Continue blocks */ |
79072805 | 512 | cont : /* NULL */ |
bcabcc50 | 513 | { $$ = (OP*)NULL; } |
79072805 | 514 | | CONTINUE block |
b5bbe64a | 515 | { $$ = op_scope($2); } |
79072805 LW |
516 | ; |
517 | ||
a034e688 DM |
518 | /* determine whether there are any new my declarations */ |
519 | mintro : /* NULL */ | |
520 | { $$ = (PL_min_intro_pending && | |
521 | PL_max_intro_pending >= PL_min_intro_pending); | |
522 | intro_my(); } | |
523 | ||
891be019 | 524 | /* Normal expression */ |
8d063cd8 | 525 | nexpr : /* NULL */ |
bcabcc50 | 526 | { $$ = (OP*)NULL; } |
8d063cd8 LW |
527 | | sideff |
528 | ; | |
529 | ||
891be019 | 530 | /* Boolean expression */ |
8d063cd8 | 531 | texpr : /* NULL means true */ |
f05e27e5 DM |
532 | { YYSTYPE tmplval; |
533 | (void)scan_num("1", &tmplval); | |
534 | $$ = tmplval.opval; } | |
8d063cd8 LW |
535 | | expr |
536 | ; | |
537 | ||
891be019 | 538 | /* Inverted boolean expression */ |
55497cff | 539 | iexpr : expr |
540 | { $$ = invert(scalar($1)); } | |
541 | ; | |
542 | ||
891be019 | 543 | /* Expression with its own lexical scope */ |
55497cff | 544 | mexpr : expr |
bbce6d69 | 545 | { $$ = $1; intro_my(); } |
546 | ; | |
547 | ||
548 | mnexpr : nexpr | |
549 | { $$ = $1; intro_my(); } | |
55497cff | 550 | ; |
551 | ||
55497cff | 552 | miexpr : iexpr |
bbce6d69 | 553 | { $$ = $1; intro_my(); } |
55497cff | 554 | ; |
555 | ||
44a8e56a | 556 | formname: WORD { $$ = $1; } |
bcabcc50 | 557 | | /* NULL */ { $$ = (OP*)NULL; } |
8d063cd8 LW |
558 | ; |
559 | ||
fa83b5b6 | 560 | startsub: /* NULL */ /* start a regular subroutine scope */ |
a8ff2fa6 DM |
561 | { $$ = start_subparse(FALSE, 0); |
562 | SAVEFREESV(PL_compcv); } | |
f05e27e5 | 563 | |
28757baa | 564 | ; |
565 | ||
566 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
a8ff2fa6 DM |
567 | { $$ = start_subparse(FALSE, CVf_ANON); |
568 | SAVEFREESV(PL_compcv); } | |
28757baa | 569 | ; |
570 | ||
44a8e56a | 571 | startformsub: /* NULL */ /* start a format subroutine scope */ |
a8ff2fa6 DM |
572 | { $$ = start_subparse(TRUE, 0); |
573 | SAVEFREESV(PL_compcv); } | |
44a8e56a | 574 | ; |
575 | ||
891be019 | 576 | /* Name of a subroutine - must be a bareword, could be special */ |
50278755 | 577 | subname : WORD |
4210d3f1 | 578 | | PRIVATEREF |
a0d0e21e LW |
579 | ; |
580 | ||
891be019 | 581 | /* Subroutine prototype */ |
4633a7c4 | 582 | proto : /* NULL */ |
bcabcc50 | 583 | { $$ = (OP*)NULL; } |
4633a7c4 LW |
584 | | THING |
585 | ; | |
28757baa | 586 | |
891be019 | 587 | /* Optional list of subroutine attributes */ |
09bef843 | 588 | subattrlist: /* NULL */ |
bcabcc50 | 589 | { $$ = (OP*)NULL; } |
09bef843 | 590 | | COLONATTR THING |
b5bbe64a | 591 | { $$ = $2; } |
09bef843 | 592 | | COLONATTR |
b5bbe64a | 593 | { $$ = (OP*)NULL; } |
09bef843 SB |
594 | ; |
595 | ||
891be019 | 596 | /* List of attributes for a "my" variable declaration */ |
09bef843 | 597 | myattrlist: COLONATTR THING |
b5bbe64a | 598 | { $$ = $2; } |
09bef843 | 599 | | COLONATTR |
b5bbe64a | 600 | { $$ = (OP*)NULL; } |
09bef843 SB |
601 | ; |
602 | ||
30d9c59b Z |
603 | /* Optional subroutine signature */ |
604 | subsignature: /* NULL */ { $$ = (OP*)NULL; } | |
605 | | '(' | |
606 | { | |
607 | if (!FEATURE_SIGNATURES_IS_ENABLED) | |
608 | Perl_croak(aTHX_ "Experimental " | |
609 | "subroutine signatures not enabled"); | |
610 | Perl_ck_warner_d(aTHX_ | |
611 | packWARN(WARN_EXPERIMENTAL__SIGNATURES), | |
612 | "The signatures feature is experimental"); | |
613 | $<opval>$ = parse_subsignature(); | |
614 | } | |
615 | ')' | |
616 | { | |
617 | $$ = op_append_list(OP_LINESEQ, $<opval>2, | |
618 | newSTATEOP(0, NULL, sawparens(newNULLLIST()))); | |
624fa8bd | 619 | parser->expect = XBLOCK; |
30d9c59b Z |
620 | } |
621 | ; | |
622 | ||
623 | /* Subroutine body - block with optional signature */ | |
624 | realsubbody: remember subsignature '{' stmtseq '}' | |
625 | { | |
624fa8bd FC |
626 | if (parser->copline > (line_t)$3) |
627 | parser->copline = (line_t)$3; | |
30d9c59b Z |
628 | $$ = block_end($1, |
629 | op_append_list(OP_LINESEQ, $2, $4)); | |
30d9c59b Z |
630 | } |
631 | ; | |
632 | ||
633 | /* Optional subroutine body, for named subroutine declaration */ | |
634 | optsubbody: realsubbody { $$ = $1; } | |
2d0e3c96 | 635 | | ';' { $$ = (OP*)NULL; } |
8d063cd8 LW |
636 | ; |
637 | ||
891be019 | 638 | /* Ordinary expressions; logical combinations */ |
a0d0e21e | 639 | expr : expr ANDOP expr |
b5bbe64a | 640 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
a0d0e21e | 641 | | expr OROP expr |
b5bbe64a | 642 | { $$ = newLOGOP($2, 0, $1, $3); } |
c963b151 | 643 | | expr DOROP expr |
b5bbe64a | 644 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
09b1cffe | 645 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
646 | ; |
647 | ||
891be019 | 648 | /* Expressions are a list of terms joined by commas */ |
09b1cffe | 649 | listexpr: listexpr ',' |
b5bbe64a | 650 | { $$ = $1; } |
09b1cffe | 651 | | listexpr ',' term |
f05e27e5 | 652 | { |
29522234 | 653 | OP* term = $3; |
2fcb4757 | 654 | $$ = op_append_elem(OP_LIST, $1, term); |
f05e27e5 | 655 | } |
fad39ff1 | 656 | | term %prec PREC_LOW |
8d063cd8 LW |
657 | ; |
658 | ||
891be019 | 659 | /* List operators */ |
09b1cffe | 660 | listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ |
03d05f6e | 661 | { $$ = op_convert_list($1, OPf_STACKED, |
b5bbe64a | 662 | op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); |
f05e27e5 | 663 | } |
891be019 | 664 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
03d05f6e | 665 | { $$ = op_convert_list($1, OPf_STACKED, |
b5bbe64a | 666 | op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); |
f05e27e5 | 667 | } |
417a992d | 668 | | term ARROW method '(' optexpr ')' /* $foo->bar(list) */ |
03d05f6e | 669 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
670 | op_append_elem(OP_LIST, |
671 | op_prepend_elem(OP_LIST, scalar($1), $5), | |
b46e009d | 672 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 673 | } |
891be019 | 674 | | term ARROW method /* $foo->bar */ |
03d05f6e | 675 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 676 | op_append_elem(OP_LIST, scalar($1), |
b46e009d | 677 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 678 | } |
09b1cffe | 679 | | METHOD indirob optlistexpr /* new Class @args */ |
03d05f6e | 680 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
681 | op_append_elem(OP_LIST, |
682 | op_prepend_elem(OP_LIST, $2, $3), | |
b46e009d | 683 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 684 | } |
09b1cffe | 685 | | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ |
03d05f6e | 686 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
687 | op_append_elem(OP_LIST, |
688 | op_prepend_elem(OP_LIST, $2, $4), | |
b46e009d | 689 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 690 | } |
09b1cffe | 691 | | LSTOP optlistexpr /* print @args */ |
03d05f6e | 692 | { $$ = op_convert_list($1, 0, $2); } |
09b1cffe | 693 | | FUNC '(' optexpr ')' /* print (@args) */ |
03d05f6e | 694 | { $$ = op_convert_list($1, 0, $3); } |
718a7425 | 695 | | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ |
5a5094bd | 696 | { SvREFCNT_inc_simple_void(PL_compcv); |
bcabcc50 | 697 | $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } |
09b1cffe | 698 | optlistexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 699 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
700 | op_append_elem(OP_LIST, |
701 | op_prepend_elem(OP_LIST, $<opval>4, $5), $1)); | |
f05e27e5 | 702 | } |
a687059c LW |
703 | ; |
704 | ||
891be019 | 705 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
706 | method : METHOD |
707 | | scalar | |
708 | ; | |
709 | ||
891be019 | 710 | /* Some kind of subscripted expression */ |
89f35911 | 711 | subscripted: gelem '{' expr ';' '}' /* *main::{something} */ |
891be019 SC |
712 | /* In this and all the hash accessors, ';' is |
713 | * provided by the tokeniser */ | |
5c86b6df | 714 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } |
891be019 | 715 | | scalar '[' expr ']' /* $array[$element] */ |
f05e27e5 | 716 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); |
f05e27e5 | 717 | } |
891be019 | 718 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
719 | { $$ = newBINOP(OP_AELEM, 0, |
720 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 721 | scalar($4)); |
f05e27e5 | 722 | } |
891be019 | 723 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
724 | { $$ = newBINOP(OP_AELEM, 0, |
725 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 726 | scalar($3)); |
f05e27e5 | 727 | } |
5a63ceef | 728 | | scalar '{' expr ';' '}' /* $foo{bar();} */ |
fad39ff1 | 729 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
f05e27e5 | 730 | } |
891be019 | 731 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
732 | { $$ = newBINOP(OP_HELEM, 0, |
733 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 734 | jmaybe($4)); } |
891be019 | 735 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
736 | { $$ = newBINOP(OP_HELEM, 0, |
737 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 738 | jmaybe($3)); } |
891be019 | 739 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 | 740 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 741 | newCVREF(0, scalar($1))); } |
891be019 | 742 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 | 743 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 744 | op_append_elem(OP_LIST, $4, |
b5bbe64a | 745 | newCVREF(0, scalar($1)))); } |
fad39ff1 | 746 | |
417a992d | 747 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 | 748 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 749 | op_append_elem(OP_LIST, $3, |
b5bbe64a | 750 | newCVREF(0, scalar($1)))); } |
417a992d | 751 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 | 752 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 753 | newCVREF(0, scalar($1))); } |
9a9798c2 | 754 | | '(' expr ')' '[' expr ']' /* list slice */ |
b5bbe64a | 755 | { $$ = newSLICEOP(0, $5, $2); } |
ea25a9b2 | 756 | | QWLIST '[' expr ']' /* list literal slice */ |
b5bbe64a | 757 | { $$ = newSLICEOP(0, $3, $1); } |
9a9798c2 | 758 | | '(' ')' '[' expr ']' /* empty list slice! */ |
b5bbe64a | 759 | { $$ = newSLICEOP(0, $4, (OP*)NULL); } |
891be019 | 760 | ; |
fad39ff1 | 761 | |
891be019 | 762 | /* Binary operators between terms */ |
f05e27e5 | 763 | termbinop: term ASSIGNOP term /* $x = $y */ |
b5bbe64a | 764 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 765 | | term POWOP term /* $x ** $y */ |
b5bbe64a | 766 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 767 | | term MULOP term /* $x * $y, $x x $y */ |
b5bbe64a | 768 | { if ($2 != OP_REPEAT) |
79072805 | 769 | scalar($1); |
b5bbe64a | 770 | $$ = newBINOP($2, 0, $1, scalar($3)); |
f05e27e5 | 771 | } |
891be019 | 772 | | term ADDOP term /* $x + $y */ |
b5bbe64a | 773 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 774 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
b5bbe64a | 775 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 776 | | term RELOP term /* $x > $y, etc. */ |
b5bbe64a | 777 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 778 | | term EQOP term /* $x == $y, $x eq $y */ |
b5bbe64a | 779 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 780 | | term BITANDOP term /* $x & $y */ |
b5bbe64a | 781 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 782 | | term BITOROP term /* $x | $y */ |
b5bbe64a | 783 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 784 | | term DOTDOT term /* $x..$y, $x...$y */ |
b5bbe64a | 785 | { $$ = newRANGE($2, scalar($1), scalar($3)); } |
891be019 | 786 | | term ANDAND term /* $x && $y */ |
b5bbe64a | 787 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 788 | | term OROR term /* $x || $y */ |
b5bbe64a | 789 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 | 790 | | term DORDOR term /* $x // $y */ |
b5bbe64a | 791 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
891be019 | 792 | | term MATCHOP term /* $x =~ /$y/ */ |
b5bbe64a | 793 | { $$ = bind_match($2, $1, $3); } |
891be019 | 794 | ; |
8d063cd8 | 795 | |
891be019 SC |
796 | /* Unary operators and terms */ |
797 | termunop : '-' term %prec UMINUS /* -$x */ | |
b5bbe64a | 798 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 799 | | '+' term %prec UMINUS /* +$x */ |
b5bbe64a JH |
800 | { $$ = $2; } |
801 | ||
891be019 | 802 | | '!' term /* !$x */ |
b5bbe64a | 803 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 804 | | '~' term /* ~$x */ |
b5bbe64a | 805 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2)); } |
891be019 | 806 | | term POSTINC /* $x++ */ |
79072805 | 807 | { $$ = newUNOP(OP_POSTINC, 0, |
b5bbe64a | 808 | op_lvalue(scalar($1), OP_POSTINC)); } |
891be019 | 809 | | term POSTDEC /* $x-- */ |
79072805 | 810 | { $$ = newUNOP(OP_POSTDEC, 0, |
b5bbe64a | 811 | op_lvalue(scalar($1), OP_POSTDEC));} |
cc624add | 812 | | term POSTJOIN /* implicit join after interpolated ->@ */ |
03d05f6e | 813 | { $$ = op_convert_list(OP_JOIN, 0, |
cc624add FC |
814 | op_append_elem( |
815 | OP_LIST, | |
816 | newSVREF(scalar( | |
817 | newSVOP(OP_CONST,0, | |
818 | newSVpvs("\"")) | |
819 | )), | |
820 | $1 | |
821 | )); | |
cc624add | 822 | } |
891be019 | 823 | | PREINC term /* ++$x */ |
79072805 | 824 | { $$ = newUNOP(OP_PREINC, 0, |
b5bbe64a | 825 | op_lvalue(scalar($2), OP_PREINC)); } |
891be019 | 826 | | PREDEC term /* --$x */ |
79072805 | 827 | { $$ = newUNOP(OP_PREDEC, 0, |
b5bbe64a | 828 | op_lvalue(scalar($2), OP_PREDEC)); } |
891be019 SC |
829 | |
830 | ; | |
831 | ||
832 | /* Constructors for anonymous data */ | |
833 | anonymous: '[' expr ']' | |
b5bbe64a | 834 | { $$ = newANONLIST($2); } |
891be019 | 835 | | '[' ']' |
b5bbe64a | 836 | { $$ = newANONLIST((OP*)NULL);} |
891be019 | 837 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ |
b5bbe64a | 838 | { $$ = newANONHASH($2); } |
891be019 | 839 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
b5bbe64a | 840 | { $$ = newANONHASH((OP*)NULL); } |
30d9c59b | 841 | | ANONSUB startanonsub proto subattrlist realsubbody %prec '(' |
5a5094bd | 842 | { SvREFCNT_inc_simple_void(PL_compcv); |
b5bbe64a | 843 | $$ = newANONATTRSUB($2, $3, $4, $5); } |
891be019 SC |
844 | |
845 | ; | |
846 | ||
847 | /* Things called with "do" */ | |
848 | termdo : DO term %prec UNIOP /* do $filename */ | |
b5bbe64a | 849 | { $$ = dofile($2, $1);} |
891be019 | 850 | | DO block %prec '(' /* do { code */ |
b5bbe64a | 851 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));} |
891be019 SC |
852 | ; |
853 | ||
854 | term : termbinop | |
855 | | termunop | |
856 | | anonymous | |
857 | | termdo | |
e9bdcc27 | 858 | | term '?' term ':' term |
b5bbe64a | 859 | { $$ = newCONDOP(0, $1, $3, $5); } |
891be019 | 860 | | REFGEN term /* \$x, \@y, \%z */ |
b5bbe64a | 861 | { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN)); } |
09bef843 SB |
862 | | myattrterm %prec UNIOP |
863 | { $$ = $1; } | |
864 | | LOCAL term %prec UNIOP | |
b5bbe64a | 865 | { $$ = localize($2,$1); } |
a0d0e21e | 866 | | '(' expr ')' |
b5bbe64a | 867 | { $$ = sawparens($2); } |
ea25a9b2 | 868 | | QWLIST |
b5bbe64a | 869 | { $$ = $1; } |
8d063cd8 | 870 | | '(' ')' |
b5bbe64a | 871 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 872 | | scalar %prec '(' |
8d063cd8 | 873 | { $$ = $1; } |
79072805 | 874 | | star %prec '(' |
8d063cd8 | 875 | { $$ = $1; } |
79072805 | 876 | | hsh %prec '(' |
8d063cd8 | 877 | { $$ = $1; } |
79072805 | 878 | | ary %prec '(' |
8d063cd8 | 879 | { $$ = $1; } |
891be019 | 880 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 881 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
882 | | subscripted |
883 | { $$ = $1; } | |
89f35911 | 884 | | sliceme '[' expr ']' /* array slice */ |
2fcb4757 | 885 | { $$ = op_prepend_elem(OP_ASLICE, |
79072805 | 886 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
887 | newLISTOP(OP_ASLICE, 0, |
888 | list($3), | |
f05e27e5 | 889 | ref($1, OP_ASLICE))); |
429a2555 FC |
890 | if ($$ && $1) |
891 | $$->op_private |= | |
892 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 893 | } |
76eba8ab | 894 | | kvslice '[' expr ']' /* array key/value slice */ |
6dd3e0f2 RZ |
895 | { $$ = op_prepend_elem(OP_KVASLICE, |
896 | newOP(OP_PUSHMARK, 0), | |
897 | newLISTOP(OP_KVASLICE, 0, | |
898 | list($3), | |
899 | ref(oopsAV($1), OP_KVASLICE))); | |
95a31aad FC |
900 | if ($$ && $1) |
901 | $$->op_private |= | |
902 | $1->op_private & OPpSLICEWARNING; | |
6dd3e0f2 | 903 | } |
89f35911 | 904 | | sliceme '{' expr ';' '}' /* @hash{@keys} */ |
2fcb4757 | 905 | { $$ = op_prepend_elem(OP_HSLICE, |
79072805 | 906 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
907 | newLISTOP(OP_HSLICE, 0, |
908 | list($3), | |
a0d0e21e | 909 | ref(oopsHV($1), OP_HSLICE))); |
429a2555 FC |
910 | if ($$ && $1) |
911 | $$->op_private |= | |
912 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 913 | } |
76eba8ab | 914 | | kvslice '{' expr ';' '}' /* %hash{@keys} */ |
5cae3edb RZ |
915 | { $$ = op_prepend_elem(OP_KVHSLICE, |
916 | newOP(OP_PUSHMARK, 0), | |
917 | newLISTOP(OP_KVHSLICE, 0, | |
918 | list($3), | |
919 | ref($1, OP_KVHSLICE))); | |
95a31aad FC |
920 | if ($$ && $1) |
921 | $$->op_private |= | |
922 | $1->op_private & OPpSLICEWARNING; | |
5cae3edb | 923 | } |
79072805 LW |
924 | | THING %prec '(' |
925 | { $$ = $1; } | |
891be019 | 926 | | amper /* &foo; */ |
c07a80fd | 927 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
fb602e32 | 928 | | amper '(' ')' /* &foo() or foo() */ |
f05e27e5 | 929 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); |
f05e27e5 | 930 | } |
fb602e32 | 931 | | amper '(' expr ')' /* &foo(@args) or foo(@args) */ |
f05e27e5 DM |
932 | { |
933 | $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, | |
2fcb4757 | 934 | op_append_elem(OP_LIST, $3, scalar($1))); |
f05e27e5 | 935 | } |
fb602e32 | 936 | | NOAMP subname optlistexpr /* foo @args (no parens) */ |
a0d0e21e | 937 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 938 | op_append_elem(OP_LIST, $3, scalar($2))); |
f05e27e5 | 939 | } |
89f35911 | 940 | | term ARROW '$' '*' |
b5bbe64a | 941 | { $$ = newSVREF($1); } |
89f35911 | 942 | | term ARROW '@' '*' |
b5bbe64a | 943 | { $$ = newAVREF($1); } |
89f35911 | 944 | | term ARROW '%' '*' |
b5bbe64a | 945 | { $$ = newHVREF($1); } |
89f35911 FC |
946 | | term ARROW '&' '*' |
947 | { $$ = newUNOP(OP_ENTERSUB, 0, | |
b5bbe64a | 948 | scalar(newCVREF($3,$1))); } |
89f35911 | 949 | | term ARROW '*' '*' %prec '(' |
b5bbe64a | 950 | { $$ = newGVREF(0,$1); } |
891be019 | 951 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
b5bbe64a JH |
952 | { $$ = newOP($1, OPf_SPECIAL); |
953 | PL_hints |= HINT_BLOCK_SCOPE; } | |
a0d0e21e | 954 | | LOOPEX term |
b5bbe64a | 955 | { $$ = newLOOPEX($1,$2); } |
09b1cffe | 956 | | NOTOP listexpr /* not $foo */ |
b5bbe64a | 957 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 958 | | UNIOP /* Unary op, $_ implied */ |
b5bbe64a | 959 | { $$ = newOP($1, 0); } |
f05e27e5 | 960 | | UNIOP block /* eval { foo }* */ |
b5bbe64a | 961 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 962 | | UNIOP term /* Unary op */ |
b5bbe64a | 963 | { $$ = newUNOP($1, 0, $2); } |
d2fdf8fd | 964 | | REQUIRE /* require, $_ implied */ |
b5bbe64a | 965 | { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); } |
d2fdf8fd | 966 | | REQUIRE term /* require Foo */ |
b5bbe64a | 967 | { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); } |
3cd0a11a RGS |
968 | | UNIOPSUB |
969 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | |
891be019 | 970 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 | 971 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 972 | op_append_elem(OP_LIST, $2, scalar($1))); } |
891be019 | 973 | | FUNC0 /* Nullary operator */ |
b5bbe64a | 974 | { $$ = newOP($1, 0); } |
ae986130 | 975 | | FUNC0 '(' ')' |
b5bbe64a | 976 | { $$ = newOP($1, 0);} |
7eb971ee FC |
977 | | FUNC0OP /* Same as above, but op created in toke.c */ |
978 | { $$ = $1; } | |
979 | | FUNC0OP '(' ')' | |
b5bbe64a | 980 | { $$ = $1; } |
891be019 | 981 | | FUNC0SUB /* Sub treated as nullop */ |
b5bbe64a | 982 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 983 | | FUNC1 '(' ')' /* not () */ |
b5bbe64a JH |
984 | { $$ = ($1 == OP_NOT) |
985 | ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) | |
986 | : newOP($1, OPf_SPECIAL); } | |
891be019 | 987 | | FUNC1 '(' expr ')' /* not($foo) */ |
b5bbe64a | 988 | { $$ = newUNOP($1, 0, $3); } |
d63c20f2 DM |
989 | | PMFUNC /* m//, s///, qr//, tr/// */ |
990 | { | |
991 | if ( $1->op_type != OP_TRANS | |
992 | && $1->op_type != OP_TRANSR | |
993 | && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV)) | |
994 | { | |
995 | $<ival>$ = start_subparse(FALSE, CVf_ANON); | |
996 | SAVEFREESV(PL_compcv); | |
997 | } else | |
998 | $<ival>$ = 0; | |
999 | } | |
1000 | '(' listexpr ')' | |
b5bbe64a | 1001 | { $$ = pmruntime($1, $4, 1, $<ival>2); } |
79072805 | 1002 | | WORD |
378cc40b | 1003 | | listop |
be25f609 | 1004 | | YADAYADA |
1005 | { | |
1006 | $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0), | |
1007 | newSVOP(OP_CONST, 0, newSVpvs("Unimplemented"))); | |
1008 | } | |
88e1f1a2 | 1009 | | PLUGEXPR |
8d063cd8 LW |
1010 | ; |
1011 | ||
891be019 | 1012 | /* "my" declarations, with optional attributes */ |
09bef843 | 1013 | myattrterm: MY myterm myattrlist |
b5bbe64a | 1014 | { $$ = my_attrs($2,$3); } |
09bef843 | 1015 | | MY myterm |
b5bbe64a | 1016 | { $$ = localize($2,$1); } |
09bef843 SB |
1017 | ; |
1018 | ||
891be019 | 1019 | /* Things that can be "my"'d */ |
09bef843 | 1020 | myterm : '(' expr ')' |
b5bbe64a | 1021 | { $$ = sawparens($2); } |
09bef843 | 1022 | | '(' ')' |
b5bbe64a JH |
1023 | { $$ = sawparens(newNULLLIST()); } |
1024 | ||
09bef843 SB |
1025 | | scalar %prec '(' |
1026 | { $$ = $1; } | |
1027 | | hsh %prec '(' | |
1028 | { $$ = $1; } | |
1029 | | ary %prec '(' | |
1030 | { $$ = $1; } | |
1031 | ; | |
1032 | ||
891be019 | 1033 | /* Basic list expressions */ |
09b1cffe | 1034 | optlistexpr: /* NULL */ %prec PREC_LOW |
bcabcc50 | 1035 | { $$ = (OP*)NULL; } |
09b1cffe | 1036 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
1037 | { $$ = $1; } |
1038 | ; | |
1039 | ||
09b1cffe | 1040 | optexpr: /* NULL */ |
bcabcc50 | 1041 | { $$ = (OP*)NULL; } |
79072805 LW |
1042 | | expr |
1043 | { $$ = $1; } | |
1044 | ; | |
1045 | ||
891be019 SC |
1046 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
1047 | lexical */ | |
55497cff | 1048 | my_scalar: scalar |
624fa8bd | 1049 | { parser->in_my = 0; $$ = my($1); } |
55497cff | 1050 | ; |
1051 | ||
d39c26a6 FC |
1052 | my_var : scalar |
1053 | | ary | |
1054 | | hsh | |
1055 | ; | |
1056 | ||
1057 | refgen_topic: my_var | |
1058 | | amper | |
1059 | ; | |
1060 | ||
79072805 | 1061 | amper : '&' indirob |
b5bbe64a | 1062 | { $$ = newCVREF($1,$2); } |
a687059c LW |
1063 | ; |
1064 | ||
79072805 | 1065 | scalar : '$' indirob |
b5bbe64a | 1066 | { $$ = newSVREF($2); } |
a687059c LW |
1067 | ; |
1068 | ||
79072805 | 1069 | ary : '@' indirob |
f05e27e5 | 1070 | { $$ = newAVREF($2); |
b5bbe64a | 1071 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1072 | } |
79072805 LW |
1073 | ; |
1074 | ||
1075 | hsh : '%' indirob | |
f05e27e5 | 1076 | { $$ = newHVREF($2); |
b5bbe64a | 1077 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1078 | } |
79072805 LW |
1079 | ; |
1080 | ||
1081 | arylen : DOLSHARP indirob | |
b5bbe64a | 1082 | { $$ = newAVREF($2); } |
ff25e5db | 1083 | | term ARROW DOLSHARP '*' |
b5bbe64a | 1084 | { $$ = newAVREF($1); } |
79072805 LW |
1085 | ; |
1086 | ||
1087 | star : '*' indirob | |
b5bbe64a | 1088 | { $$ = newGVREF(0,$2); } |
79072805 LW |
1089 | ; |
1090 | ||
89f35911 FC |
1091 | sliceme : ary |
1092 | | term ARROW '@' | |
b5bbe64a | 1093 | { $$ = newAVREF($1); } |
89f35911 FC |
1094 | ; |
1095 | ||
76eba8ab FC |
1096 | kvslice : hsh |
1097 | | term ARROW '%' | |
b5bbe64a | 1098 | { $$ = newHVREF($1); } |
76eba8ab FC |
1099 | ; |
1100 | ||
89f35911 FC |
1101 | gelem : star |
1102 | | term ARROW '*' | |
b5bbe64a | 1103 | { $$ = newGVREF(0,$1); } |
89f35911 FC |
1104 | ; |
1105 | ||
891be019 | 1106 | /* Indirect objects */ |
79072805 LW |
1107 | indirob : WORD |
1108 | { $$ = scalar($1); } | |
fad39ff1 | 1109 | | scalar %prec PREC_LOW |
f05e27e5 | 1110 | { $$ = scalar($1); } |
79072805 | 1111 | | block |
3ad73efd | 1112 | { $$ = op_scope($1); } |
79072805 | 1113 | |
93a17b20 LW |
1114 | | PRIVATEREF |
1115 | { $$ = $1; } | |
8d063cd8 | 1116 | ; |