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 | $$ = (OP*)NULL; | |
4a273b91 | 262 | if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) { |
74a9453a | 263 | pad_add_weakref(fmtcv); |
f05e27e5 | 264 | } |
8b9fb2f9 | 265 | parser->parsed_sub = 1; |
eae48c89 | 266 | } |
50278755 FC |
267 | | SUB subname startsub |
268 | { | |
269 | if ($2->op_type == OP_CONST) { | |
270 | const char *const name = | |
271 | SvPV_nolen_const(((SVOP*)$2)->op_sv); | |
272 | if (strEQ(name, "BEGIN") || strEQ(name, "END") | |
764212cf FC |
273 | || strEQ(name, "INIT") || strEQ(name, "CHECK") |
274 | || strEQ(name, "UNITCHECK")) | |
275 | CvSPECIAL_on(PL_compcv); | |
50278755 | 276 | } |
e07561e6 FC |
277 | else |
278 | /* State subs inside anonymous subs need to be | |
279 | clonable themselves. */ | |
6d5c2147 FC |
280 | if (CvANON(CvOUTSIDE(PL_compcv)) |
281 | || CvCLONE(CvOUTSIDE(PL_compcv)) | |
282 | || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST( | |
283 | CvOUTSIDE(PL_compcv) | |
284 | ))[$2->op_targ])) | |
e07561e6 | 285 | CvCLONE_on(PL_compcv); |
624fa8bd FC |
286 | parser->in_my = 0; |
287 | parser->in_my_stash = NULL; | |
764212cf | 288 | } |
30d9c59b | 289 | proto subattrlist optsubbody |
eae48c89 Z |
290 | { |
291 | SvREFCNT_inc_simple_void(PL_compcv); | |
50278755 FC |
292 | $2->op_type == OP_CONST |
293 | ? newATTRSUB($3, $2, $5, $6, $7) | |
294 | : newMYSUB($3, $2, $5, $6, $7) | |
50278755 | 295 | ; |
eae48c89 | 296 | $$ = (OP*)NULL; |
764212cf | 297 | intro_my(); |
34b54951 | 298 | parser->parsed_sub = 1; |
f05e27e5 | 299 | } |
eae48c89 | 300 | | PACKAGE WORD WORD ';' |
5f211341 | 301 | { |
eae48c89 Z |
302 | package($3); |
303 | if ($2) | |
304 | package_version($2); | |
305 | $$ = (OP*)NULL; | |
eae48c89 Z |
306 | } |
307 | | USE startsub | |
308 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } | |
09b1cffe | 309 | WORD WORD optlistexpr ';' |
eae48c89 Z |
310 | { |
311 | SvREFCNT_inc_simple_void(PL_compcv); | |
b5bbe64a | 312 | utilize($1, $2, $4, $5, $6); |
34b54951 | 313 | parser->parsed_sub = 1; |
eae48c89 | 314 | $$ = (OP*)NULL; |
eae48c89 | 315 | } |
417a992d | 316 | | IF '(' remember mexpr ')' mblock else |
eae48c89 | 317 | { |
3ad73efd Z |
318 | $$ = block_end($3, |
319 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 320 | parser->copline = (line_t)$1; |
eae48c89 | 321 | } |
417a992d | 322 | | UNLESS '(' remember miexpr ')' mblock else |
eae48c89 | 323 | { |
3ad73efd Z |
324 | $$ = block_end($3, |
325 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 326 | parser->copline = (line_t)$1; |
eae48c89 | 327 | } |
b5a64814 | 328 | | GIVEN '(' remember mexpr ')' mblock |
eae48c89 | 329 | { |
b5a64814 | 330 | const PADOFFSET offset = pad_findmy_pvs("$_", 0); |
eae48c89 | 331 | $$ = block_end($3, |
b5a64814 FC |
332 | newGIVENOP($4, op_scope($6), |
333 | offset == NOT_IN_PAD | |
334 | || PAD_COMPNAME_FLAGS_isOUR(offset) | |
335 | ? 0 | |
336 | : offset)); | |
624fa8bd | 337 | parser->copline = (line_t)$1; |
eae48c89 | 338 | } |
417a992d | 339 | | WHEN '(' remember mexpr ')' mblock |
3ad73efd | 340 | { $$ = block_end($3, newWHENOP($4, op_scope($6))); } |
eae48c89 | 341 | | DEFAULT block |
3ad73efd | 342 | { $$ = newWHENOP(0, op_scope($2)); } |
417a992d | 343 | | WHILE '(' remember texpr ')' mintro mblock cont |
eae48c89 Z |
344 | { |
345 | $$ = block_end($3, | |
346 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 347 | $4, $7, $8, $6)); |
624fa8bd | 348 | parser->copline = (line_t)$1; |
eae48c89 | 349 | } |
417a992d | 350 | | UNTIL '(' remember iexpr ')' mintro mblock cont |
eae48c89 Z |
351 | { |
352 | $$ = block_end($3, | |
94bf0465 Z |
353 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
354 | $4, $7, $8, $6)); | |
624fa8bd | 355 | parser->copline = (line_t)$1; |
eae48c89 | 356 | } |
2d0e3c96 FC |
357 | | FOR '(' remember mnexpr ';' |
358 | { parser->expect = XTERM; } | |
359 | texpr ';' | |
360 | { parser->expect = XTERM; } | |
361 | mintro mnexpr ')' | |
eae48c89 Z |
362 | mblock |
363 | { | |
b5bbe64a | 364 | OP *initop = $4; |
eae48c89 | 365 | OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
2d0e3c96 | 366 | scalar($7), $13, $11, $10); |
eae48c89 Z |
367 | if (initop) { |
368 | forop = op_prepend_elem(OP_LINESEQ, initop, | |
369 | op_append_elem(OP_LINESEQ, | |
370 | newOP(OP_UNSTACK, OPf_SPECIAL), | |
371 | forop)); | |
5f211341 | 372 | } |
0f602692 | 373 | PL_hints |= HINT_BLOCK_SCOPE; |
eae48c89 | 374 | $$ = block_end($3, forop); |
624fa8bd | 375 | parser->copline = (line_t)$1; |
eae48c89 | 376 | } |
417a992d | 377 | | FOR MY remember my_scalar '(' mexpr ')' mblock cont |
eae48c89 | 378 | { |
94bf0465 | 379 | $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); |
624fa8bd | 380 | parser->copline = (line_t)$1; |
eae48c89 | 381 | } |
417a992d | 382 | | FOR scalar '(' remember mexpr ')' mblock cont |
eae48c89 | 383 | { |
94bf0465 | 384 | $$ = block_end($4, newFOROP(0, |
3ad73efd | 385 | op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); |
624fa8bd | 386 | parser->copline = (line_t)$1; |
eae48c89 | 387 | } |
d39c26a6 FC |
388 | | FOR REFGEN MY remember my_var |
389 | { parser->in_my = 0; $<opval>$ = my($5); } | |
390 | '(' mexpr ')' mblock cont | |
391 | { | |
392 | $$ = block_end( | |
393 | $4, | |
394 | newFOROP(0, | |
395 | op_lvalue( | |
396 | newUNOP(OP_REFGEN, 0, | |
96801525 | 397 | $<opval>6), |
d39c26a6 FC |
398 | OP_ENTERLOOP), |
399 | $8, $10, $11) | |
400 | ); | |
401 | parser->copline = (line_t)$1; | |
402 | } | |
403 | | FOR REFGEN refgen_topic '(' remember mexpr ')' mblock cont | |
404 | { | |
405 | $$ = block_end($5, newFOROP( | |
406 | 0, op_lvalue(newUNOP(OP_REFGEN, 0, | |
96801525 | 407 | $3), |
d39c26a6 FC |
408 | OP_ENTERLOOP), $6, $8, $9)); |
409 | parser->copline = (line_t)$1; | |
410 | } | |
417a992d | 411 | | FOR '(' remember mexpr ')' mblock cont |
eae48c89 Z |
412 | { |
413 | $$ = block_end($3, | |
94bf0465 | 414 | newFOROP(0, (OP*)NULL, $4, $6, $7)); |
624fa8bd | 415 | parser->copline = (line_t)$1; |
eae48c89 Z |
416 | } |
417 | | block cont | |
418 | { | |
419 | /* a block is a loop that happens once */ | |
420 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 421 | (OP*)NULL, $1, $2, 0); |
eae48c89 Z |
422 | } |
423 | | PACKAGE WORD WORD '{' remember | |
424 | { | |
eae48c89 | 425 | package($3); |
eae48c89 | 426 | if ($2) { |
eae48c89 | 427 | package_version($2); |
eae48c89 Z |
428 | } |
429 | } | |
430 | stmtseq '}' | |
431 | { | |
432 | /* a block is a loop that happens once */ | |
94bf0465 | 433 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
eae48c89 | 434 | (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); |
624fa8bd FC |
435 | if (parser->copline > (line_t)$4) |
436 | parser->copline = (line_t)$4; | |
eae48c89 Z |
437 | } |
438 | | sideff ';' | |
439 | { | |
eae48c89 | 440 | $$ = $1; |
eae48c89 Z |
441 | } |
442 | | ';' | |
443 | { | |
b5bbe64a | 444 | $$ = (OP*)NULL; |
624fa8bd | 445 | parser->copline = NOLINE; |
5f211341 | 446 | } |
8d063cd8 LW |
447 | ; |
448 | ||
705fe0e5 FC |
449 | /* Format line */ |
450 | formline: THING formarg | |
451 | { OP *list; | |
452 | if ($2) { | |
453 | OP *term = $2; | |
705fe0e5 FC |
454 | list = op_append_elem(OP_LIST, $1, term); |
455 | } | |
456 | else { | |
705fe0e5 | 457 | list = $1; |
705fe0e5 | 458 | } |
624fa8bd FC |
459 | if (parser->copline == NOLINE) |
460 | parser->copline = CopLINE(PL_curcop)-1; | |
461 | else parser->copline--; | |
705fe0e5 | 462 | $$ = newSTATEOP(0, NULL, |
03d05f6e | 463 | op_convert_list(OP_FORMLINE, 0, list)); |
705fe0e5 FC |
464 | } |
465 | ; | |
466 | ||
467 | formarg : /* NULL */ | |
468 | { $$ = NULL; } | |
469 | | FORMLBRACK stmtseq FORMRBRACK | |
470 | { $$ = op_unscope($2); } | |
471 | ; | |
472 | ||
891be019 | 473 | /* An expression which may have a side-effect */ |
a687059c | 474 | sideff : error |
bcabcc50 | 475 | { $$ = (OP*)NULL; } |
a687059c | 476 | | expr |
79072805 | 477 | { $$ = $1; } |
a687059c | 478 | | expr IF expr |
b5bbe64a | 479 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 480 | | expr UNLESS expr |
b5bbe64a | 481 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 482 | | expr WHILE expr |
b5bbe64a | 483 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 484 | | expr UNTIL iexpr |
b5bbe64a | 485 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); } |
ecca16b0 | 486 | | expr FOR expr |
94bf0465 | 487 | { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL); |
624fa8bd | 488 | parser->copline = (line_t)$2; } |
f20dcd76 | 489 | | expr WHEN expr |
3ad73efd | 490 | { $$ = newWHENOP($3, op_scope($1)); } |
79072805 LW |
491 | ; |
492 | ||
891be019 | 493 | /* else and elsif blocks */ |
79072805 | 494 | else : /* NULL */ |
bcabcc50 | 495 | { $$ = (OP*)NULL; } |
55497cff | 496 | | ELSE mblock |
3ad73efd Z |
497 | { |
498 | ($2)->op_flags |= OPf_PARENS; | |
499 | $$ = op_scope($2); | |
f05e27e5 | 500 | } |
417a992d | 501 | | ELSIF '(' mexpr ')' mblock else |
624fa8bd | 502 | { parser->copline = (line_t)$1; |
3ad73efd Z |
503 | $$ = newCONDOP(0, |
504 | newSTATEOP(OPf_SPECIAL,NULL,$3), | |
505 | op_scope($5), $6); | |
506 | PL_hints |= HINT_BLOCK_SCOPE; | |
f05e27e5 | 507 | } |
79072805 LW |
508 | ; |
509 | ||
891be019 | 510 | /* Continue blocks */ |
79072805 | 511 | cont : /* NULL */ |
bcabcc50 | 512 | { $$ = (OP*)NULL; } |
79072805 | 513 | | CONTINUE block |
b5bbe64a | 514 | { $$ = op_scope($2); } |
79072805 LW |
515 | ; |
516 | ||
a034e688 DM |
517 | /* determine whether there are any new my declarations */ |
518 | mintro : /* NULL */ | |
519 | { $$ = (PL_min_intro_pending && | |
520 | PL_max_intro_pending >= PL_min_intro_pending); | |
521 | intro_my(); } | |
522 | ||
891be019 | 523 | /* Normal expression */ |
8d063cd8 | 524 | nexpr : /* NULL */ |
bcabcc50 | 525 | { $$ = (OP*)NULL; } |
8d063cd8 LW |
526 | | sideff |
527 | ; | |
528 | ||
891be019 | 529 | /* Boolean expression */ |
8d063cd8 | 530 | texpr : /* NULL means true */ |
f05e27e5 DM |
531 | { YYSTYPE tmplval; |
532 | (void)scan_num("1", &tmplval); | |
533 | $$ = tmplval.opval; } | |
8d063cd8 LW |
534 | | expr |
535 | ; | |
536 | ||
891be019 | 537 | /* Inverted boolean expression */ |
55497cff | 538 | iexpr : expr |
539 | { $$ = invert(scalar($1)); } | |
540 | ; | |
541 | ||
891be019 | 542 | /* Expression with its own lexical scope */ |
55497cff | 543 | mexpr : expr |
bbce6d69 | 544 | { $$ = $1; intro_my(); } |
545 | ; | |
546 | ||
547 | mnexpr : nexpr | |
548 | { $$ = $1; intro_my(); } | |
55497cff | 549 | ; |
550 | ||
55497cff | 551 | miexpr : iexpr |
bbce6d69 | 552 | { $$ = $1; intro_my(); } |
55497cff | 553 | ; |
554 | ||
44a8e56a | 555 | formname: WORD { $$ = $1; } |
bcabcc50 | 556 | | /* NULL */ { $$ = (OP*)NULL; } |
8d063cd8 LW |
557 | ; |
558 | ||
fa83b5b6 | 559 | startsub: /* NULL */ /* start a regular subroutine scope */ |
a8ff2fa6 DM |
560 | { $$ = start_subparse(FALSE, 0); |
561 | SAVEFREESV(PL_compcv); } | |
f05e27e5 | 562 | |
28757baa | 563 | ; |
564 | ||
565 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
a8ff2fa6 DM |
566 | { $$ = start_subparse(FALSE, CVf_ANON); |
567 | SAVEFREESV(PL_compcv); } | |
28757baa | 568 | ; |
569 | ||
44a8e56a | 570 | startformsub: /* NULL */ /* start a format subroutine scope */ |
a8ff2fa6 DM |
571 | { $$ = start_subparse(TRUE, 0); |
572 | SAVEFREESV(PL_compcv); } | |
44a8e56a | 573 | ; |
574 | ||
891be019 | 575 | /* Name of a subroutine - must be a bareword, could be special */ |
50278755 | 576 | subname : WORD |
4210d3f1 | 577 | | PRIVATEREF |
a0d0e21e LW |
578 | ; |
579 | ||
891be019 | 580 | /* Subroutine prototype */ |
4633a7c4 | 581 | proto : /* NULL */ |
bcabcc50 | 582 | { $$ = (OP*)NULL; } |
4633a7c4 LW |
583 | | THING |
584 | ; | |
28757baa | 585 | |
891be019 | 586 | /* Optional list of subroutine attributes */ |
09bef843 | 587 | subattrlist: /* NULL */ |
bcabcc50 | 588 | { $$ = (OP*)NULL; } |
09bef843 | 589 | | COLONATTR THING |
b5bbe64a | 590 | { $$ = $2; } |
09bef843 | 591 | | COLONATTR |
b5bbe64a | 592 | { $$ = (OP*)NULL; } |
09bef843 SB |
593 | ; |
594 | ||
891be019 | 595 | /* List of attributes for a "my" variable declaration */ |
09bef843 | 596 | myattrlist: COLONATTR THING |
b5bbe64a | 597 | { $$ = $2; } |
09bef843 | 598 | | COLONATTR |
b5bbe64a | 599 | { $$ = (OP*)NULL; } |
09bef843 SB |
600 | ; |
601 | ||
30d9c59b Z |
602 | /* Optional subroutine signature */ |
603 | subsignature: /* NULL */ { $$ = (OP*)NULL; } | |
604 | | '(' | |
605 | { | |
606 | if (!FEATURE_SIGNATURES_IS_ENABLED) | |
607 | Perl_croak(aTHX_ "Experimental " | |
608 | "subroutine signatures not enabled"); | |
609 | Perl_ck_warner_d(aTHX_ | |
610 | packWARN(WARN_EXPERIMENTAL__SIGNATURES), | |
611 | "The signatures feature is experimental"); | |
612 | $<opval>$ = parse_subsignature(); | |
613 | } | |
614 | ')' | |
615 | { | |
616 | $$ = op_append_list(OP_LINESEQ, $<opval>2, | |
617 | newSTATEOP(0, NULL, sawparens(newNULLLIST()))); | |
624fa8bd | 618 | parser->expect = XBLOCK; |
30d9c59b Z |
619 | } |
620 | ; | |
621 | ||
622 | /* Subroutine body - block with optional signature */ | |
623 | realsubbody: remember subsignature '{' stmtseq '}' | |
624 | { | |
624fa8bd FC |
625 | if (parser->copline > (line_t)$3) |
626 | parser->copline = (line_t)$3; | |
30d9c59b Z |
627 | $$ = block_end($1, |
628 | op_append_list(OP_LINESEQ, $2, $4)); | |
30d9c59b Z |
629 | } |
630 | ; | |
631 | ||
632 | /* Optional subroutine body, for named subroutine declaration */ | |
633 | optsubbody: realsubbody { $$ = $1; } | |
2d0e3c96 | 634 | | ';' { $$ = (OP*)NULL; } |
8d063cd8 LW |
635 | ; |
636 | ||
891be019 | 637 | /* Ordinary expressions; logical combinations */ |
a0d0e21e | 638 | expr : expr ANDOP expr |
b5bbe64a | 639 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
a0d0e21e | 640 | | expr OROP expr |
b5bbe64a | 641 | { $$ = newLOGOP($2, 0, $1, $3); } |
c963b151 | 642 | | expr DOROP expr |
b5bbe64a | 643 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
09b1cffe | 644 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
645 | ; |
646 | ||
891be019 | 647 | /* Expressions are a list of terms joined by commas */ |
09b1cffe | 648 | listexpr: listexpr ',' |
b5bbe64a | 649 | { $$ = $1; } |
09b1cffe | 650 | | listexpr ',' term |
f05e27e5 | 651 | { |
29522234 | 652 | OP* term = $3; |
2fcb4757 | 653 | $$ = op_append_elem(OP_LIST, $1, term); |
f05e27e5 | 654 | } |
fad39ff1 | 655 | | term %prec PREC_LOW |
8d063cd8 LW |
656 | ; |
657 | ||
891be019 | 658 | /* List operators */ |
09b1cffe | 659 | listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ |
03d05f6e | 660 | { $$ = op_convert_list($1, OPf_STACKED, |
b5bbe64a | 661 | op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); |
f05e27e5 | 662 | } |
891be019 | 663 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
03d05f6e | 664 | { $$ = op_convert_list($1, OPf_STACKED, |
b5bbe64a | 665 | op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); |
f05e27e5 | 666 | } |
417a992d | 667 | | term ARROW method '(' optexpr ')' /* $foo->bar(list) */ |
03d05f6e | 668 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
669 | op_append_elem(OP_LIST, |
670 | op_prepend_elem(OP_LIST, scalar($1), $5), | |
b46e009d | 671 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 672 | } |
891be019 | 673 | | term ARROW method /* $foo->bar */ |
03d05f6e | 674 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 675 | op_append_elem(OP_LIST, scalar($1), |
b46e009d | 676 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 677 | } |
09b1cffe | 678 | | METHOD indirob optlistexpr /* new Class @args */ |
03d05f6e | 679 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
680 | op_append_elem(OP_LIST, |
681 | op_prepend_elem(OP_LIST, $2, $3), | |
b46e009d | 682 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 683 | } |
09b1cffe | 684 | | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ |
03d05f6e | 685 | { $$ = op_convert_list(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
686 | op_append_elem(OP_LIST, |
687 | op_prepend_elem(OP_LIST, $2, $4), | |
b46e009d | 688 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 689 | } |
09b1cffe | 690 | | LSTOP optlistexpr /* print @args */ |
03d05f6e | 691 | { $$ = op_convert_list($1, 0, $2); } |
09b1cffe | 692 | | FUNC '(' optexpr ')' /* print (@args) */ |
03d05f6e | 693 | { $$ = op_convert_list($1, 0, $3); } |
718a7425 | 694 | | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ |
5a5094bd | 695 | { SvREFCNT_inc_simple_void(PL_compcv); |
bcabcc50 | 696 | $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } |
09b1cffe | 697 | optlistexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 698 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
699 | op_append_elem(OP_LIST, |
700 | op_prepend_elem(OP_LIST, $<opval>4, $5), $1)); | |
f05e27e5 | 701 | } |
a687059c LW |
702 | ; |
703 | ||
891be019 | 704 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
705 | method : METHOD |
706 | | scalar | |
707 | ; | |
708 | ||
891be019 | 709 | /* Some kind of subscripted expression */ |
89f35911 | 710 | subscripted: gelem '{' expr ';' '}' /* *main::{something} */ |
891be019 SC |
711 | /* In this and all the hash accessors, ';' is |
712 | * provided by the tokeniser */ | |
5c86b6df | 713 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } |
891be019 | 714 | | scalar '[' expr ']' /* $array[$element] */ |
f05e27e5 | 715 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); |
f05e27e5 | 716 | } |
891be019 | 717 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
718 | { $$ = newBINOP(OP_AELEM, 0, |
719 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 720 | scalar($4)); |
f05e27e5 | 721 | } |
891be019 | 722 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
723 | { $$ = newBINOP(OP_AELEM, 0, |
724 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 725 | scalar($3)); |
f05e27e5 | 726 | } |
5a63ceef | 727 | | scalar '{' expr ';' '}' /* $foo{bar();} */ |
fad39ff1 | 728 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
f05e27e5 | 729 | } |
891be019 | 730 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
731 | { $$ = newBINOP(OP_HELEM, 0, |
732 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 733 | jmaybe($4)); } |
891be019 | 734 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
735 | { $$ = newBINOP(OP_HELEM, 0, |
736 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 737 | jmaybe($3)); } |
891be019 | 738 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 | 739 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 740 | newCVREF(0, scalar($1))); } |
891be019 | 741 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 | 742 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 743 | op_append_elem(OP_LIST, $4, |
b5bbe64a | 744 | newCVREF(0, scalar($1)))); } |
fad39ff1 | 745 | |
417a992d | 746 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 | 747 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 748 | op_append_elem(OP_LIST, $3, |
b5bbe64a | 749 | newCVREF(0, scalar($1)))); } |
417a992d | 750 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 | 751 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 752 | newCVREF(0, scalar($1))); } |
9a9798c2 | 753 | | '(' expr ')' '[' expr ']' /* list slice */ |
b5bbe64a | 754 | { $$ = newSLICEOP(0, $5, $2); } |
ea25a9b2 | 755 | | QWLIST '[' expr ']' /* list literal slice */ |
b5bbe64a | 756 | { $$ = newSLICEOP(0, $3, $1); } |
9a9798c2 | 757 | | '(' ')' '[' expr ']' /* empty list slice! */ |
b5bbe64a | 758 | { $$ = newSLICEOP(0, $4, (OP*)NULL); } |
891be019 | 759 | ; |
fad39ff1 | 760 | |
891be019 | 761 | /* Binary operators between terms */ |
f05e27e5 | 762 | termbinop: term ASSIGNOP term /* $x = $y */ |
b5bbe64a | 763 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 764 | | term POWOP term /* $x ** $y */ |
b5bbe64a | 765 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 766 | | term MULOP term /* $x * $y, $x x $y */ |
b5bbe64a | 767 | { if ($2 != OP_REPEAT) |
79072805 | 768 | scalar($1); |
b5bbe64a | 769 | $$ = newBINOP($2, 0, $1, scalar($3)); |
f05e27e5 | 770 | } |
891be019 | 771 | | term ADDOP term /* $x + $y */ |
b5bbe64a | 772 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 773 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
b5bbe64a | 774 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 775 | | term RELOP term /* $x > $y, etc. */ |
b5bbe64a | 776 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 777 | | term EQOP term /* $x == $y, $x eq $y */ |
b5bbe64a | 778 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 779 | | term BITANDOP term /* $x & $y */ |
b5bbe64a | 780 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 781 | | term BITOROP term /* $x | $y */ |
b5bbe64a | 782 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 783 | | term DOTDOT term /* $x..$y, $x...$y */ |
b5bbe64a | 784 | { $$ = newRANGE($2, scalar($1), scalar($3)); } |
891be019 | 785 | | term ANDAND term /* $x && $y */ |
b5bbe64a | 786 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 787 | | term OROR term /* $x || $y */ |
b5bbe64a | 788 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 | 789 | | term DORDOR term /* $x // $y */ |
b5bbe64a | 790 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
891be019 | 791 | | term MATCHOP term /* $x =~ /$y/ */ |
b5bbe64a | 792 | { $$ = bind_match($2, $1, $3); } |
891be019 | 793 | ; |
8d063cd8 | 794 | |
891be019 SC |
795 | /* Unary operators and terms */ |
796 | termunop : '-' term %prec UMINUS /* -$x */ | |
b5bbe64a | 797 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 798 | | '+' term %prec UMINUS /* +$x */ |
b5bbe64a JH |
799 | { $$ = $2; } |
800 | ||
891be019 | 801 | | '!' term /* !$x */ |
b5bbe64a | 802 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 803 | | '~' term /* ~$x */ |
b5bbe64a | 804 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2)); } |
891be019 | 805 | | term POSTINC /* $x++ */ |
79072805 | 806 | { $$ = newUNOP(OP_POSTINC, 0, |
b5bbe64a | 807 | op_lvalue(scalar($1), OP_POSTINC)); } |
891be019 | 808 | | term POSTDEC /* $x-- */ |
79072805 | 809 | { $$ = newUNOP(OP_POSTDEC, 0, |
b5bbe64a | 810 | op_lvalue(scalar($1), OP_POSTDEC));} |
cc624add | 811 | | term POSTJOIN /* implicit join after interpolated ->@ */ |
03d05f6e | 812 | { $$ = op_convert_list(OP_JOIN, 0, |
cc624add FC |
813 | op_append_elem( |
814 | OP_LIST, | |
815 | newSVREF(scalar( | |
816 | newSVOP(OP_CONST,0, | |
817 | newSVpvs("\"")) | |
818 | )), | |
819 | $1 | |
820 | )); | |
cc624add | 821 | } |
891be019 | 822 | | PREINC term /* ++$x */ |
79072805 | 823 | { $$ = newUNOP(OP_PREINC, 0, |
b5bbe64a | 824 | op_lvalue(scalar($2), OP_PREINC)); } |
891be019 | 825 | | PREDEC term /* --$x */ |
79072805 | 826 | { $$ = newUNOP(OP_PREDEC, 0, |
b5bbe64a | 827 | op_lvalue(scalar($2), OP_PREDEC)); } |
891be019 SC |
828 | |
829 | ; | |
830 | ||
831 | /* Constructors for anonymous data */ | |
832 | anonymous: '[' expr ']' | |
b5bbe64a | 833 | { $$ = newANONLIST($2); } |
891be019 | 834 | | '[' ']' |
b5bbe64a | 835 | { $$ = newANONLIST((OP*)NULL);} |
891be019 | 836 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ |
b5bbe64a | 837 | { $$ = newANONHASH($2); } |
891be019 | 838 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
b5bbe64a | 839 | { $$ = newANONHASH((OP*)NULL); } |
30d9c59b | 840 | | ANONSUB startanonsub proto subattrlist realsubbody %prec '(' |
5a5094bd | 841 | { SvREFCNT_inc_simple_void(PL_compcv); |
b5bbe64a | 842 | $$ = newANONATTRSUB($2, $3, $4, $5); } |
891be019 SC |
843 | |
844 | ; | |
845 | ||
846 | /* Things called with "do" */ | |
847 | termdo : DO term %prec UNIOP /* do $filename */ | |
b5bbe64a | 848 | { $$ = dofile($2, $1);} |
891be019 | 849 | | DO block %prec '(' /* do { code */ |
b5bbe64a | 850 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));} |
891be019 SC |
851 | ; |
852 | ||
853 | term : termbinop | |
854 | | termunop | |
855 | | anonymous | |
856 | | termdo | |
e9bdcc27 | 857 | | term '?' term ':' term |
b5bbe64a | 858 | { $$ = newCONDOP(0, $1, $3, $5); } |
891be019 | 859 | | REFGEN term /* \$x, \@y, \%z */ |
b5bbe64a | 860 | { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN)); } |
09bef843 SB |
861 | | myattrterm %prec UNIOP |
862 | { $$ = $1; } | |
863 | | LOCAL term %prec UNIOP | |
b5bbe64a | 864 | { $$ = localize($2,$1); } |
a0d0e21e | 865 | | '(' expr ')' |
b5bbe64a | 866 | { $$ = sawparens($2); } |
ea25a9b2 | 867 | | QWLIST |
b5bbe64a | 868 | { $$ = $1; } |
8d063cd8 | 869 | | '(' ')' |
b5bbe64a | 870 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 871 | | scalar %prec '(' |
8d063cd8 | 872 | { $$ = $1; } |
79072805 | 873 | | star %prec '(' |
8d063cd8 | 874 | { $$ = $1; } |
79072805 | 875 | | hsh %prec '(' |
8d063cd8 | 876 | { $$ = $1; } |
79072805 | 877 | | ary %prec '(' |
8d063cd8 | 878 | { $$ = $1; } |
891be019 | 879 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 880 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
881 | | subscripted |
882 | { $$ = $1; } | |
89f35911 | 883 | | sliceme '[' expr ']' /* array slice */ |
2fcb4757 | 884 | { $$ = op_prepend_elem(OP_ASLICE, |
79072805 | 885 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
886 | newLISTOP(OP_ASLICE, 0, |
887 | list($3), | |
f05e27e5 | 888 | ref($1, OP_ASLICE))); |
429a2555 FC |
889 | if ($$ && $1) |
890 | $$->op_private |= | |
891 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 892 | } |
76eba8ab | 893 | | kvslice '[' expr ']' /* array key/value slice */ |
6dd3e0f2 RZ |
894 | { $$ = op_prepend_elem(OP_KVASLICE, |
895 | newOP(OP_PUSHMARK, 0), | |
896 | newLISTOP(OP_KVASLICE, 0, | |
897 | list($3), | |
898 | ref(oopsAV($1), OP_KVASLICE))); | |
95a31aad FC |
899 | if ($$ && $1) |
900 | $$->op_private |= | |
901 | $1->op_private & OPpSLICEWARNING; | |
6dd3e0f2 | 902 | } |
89f35911 | 903 | | sliceme '{' expr ';' '}' /* @hash{@keys} */ |
2fcb4757 | 904 | { $$ = op_prepend_elem(OP_HSLICE, |
79072805 | 905 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
906 | newLISTOP(OP_HSLICE, 0, |
907 | list($3), | |
a0d0e21e | 908 | ref(oopsHV($1), OP_HSLICE))); |
429a2555 FC |
909 | if ($$ && $1) |
910 | $$->op_private |= | |
911 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 912 | } |
76eba8ab | 913 | | kvslice '{' expr ';' '}' /* %hash{@keys} */ |
5cae3edb RZ |
914 | { $$ = op_prepend_elem(OP_KVHSLICE, |
915 | newOP(OP_PUSHMARK, 0), | |
916 | newLISTOP(OP_KVHSLICE, 0, | |
917 | list($3), | |
918 | ref($1, OP_KVHSLICE))); | |
95a31aad FC |
919 | if ($$ && $1) |
920 | $$->op_private |= | |
921 | $1->op_private & OPpSLICEWARNING; | |
5cae3edb | 922 | } |
79072805 LW |
923 | | THING %prec '(' |
924 | { $$ = $1; } | |
891be019 | 925 | | amper /* &foo; */ |
c07a80fd | 926 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
fb602e32 | 927 | | amper '(' ')' /* &foo() or foo() */ |
f05e27e5 | 928 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); |
f05e27e5 | 929 | } |
fb602e32 | 930 | | amper '(' expr ')' /* &foo(@args) or foo(@args) */ |
f05e27e5 DM |
931 | { |
932 | $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, | |
2fcb4757 | 933 | op_append_elem(OP_LIST, $3, scalar($1))); |
f05e27e5 | 934 | } |
fb602e32 | 935 | | NOAMP subname optlistexpr /* foo @args (no parens) */ |
a0d0e21e | 936 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 937 | op_append_elem(OP_LIST, $3, scalar($2))); |
f05e27e5 | 938 | } |
89f35911 | 939 | | term ARROW '$' '*' |
b5bbe64a | 940 | { $$ = newSVREF($1); } |
89f35911 | 941 | | term ARROW '@' '*' |
b5bbe64a | 942 | { $$ = newAVREF($1); } |
89f35911 | 943 | | term ARROW '%' '*' |
b5bbe64a | 944 | { $$ = newHVREF($1); } |
89f35911 FC |
945 | | term ARROW '&' '*' |
946 | { $$ = newUNOP(OP_ENTERSUB, 0, | |
b5bbe64a | 947 | scalar(newCVREF($3,$1))); } |
89f35911 | 948 | | term ARROW '*' '*' %prec '(' |
b5bbe64a | 949 | { $$ = newGVREF(0,$1); } |
891be019 | 950 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
b5bbe64a JH |
951 | { $$ = newOP($1, OPf_SPECIAL); |
952 | PL_hints |= HINT_BLOCK_SCOPE; } | |
a0d0e21e | 953 | | LOOPEX term |
b5bbe64a | 954 | { $$ = newLOOPEX($1,$2); } |
09b1cffe | 955 | | NOTOP listexpr /* not $foo */ |
b5bbe64a | 956 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 957 | | UNIOP /* Unary op, $_ implied */ |
b5bbe64a | 958 | { $$ = newOP($1, 0); } |
f05e27e5 | 959 | | UNIOP block /* eval { foo }* */ |
b5bbe64a | 960 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 961 | | UNIOP term /* Unary op */ |
b5bbe64a | 962 | { $$ = newUNOP($1, 0, $2); } |
d2fdf8fd | 963 | | REQUIRE /* require, $_ implied */ |
b5bbe64a | 964 | { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); } |
d2fdf8fd | 965 | | REQUIRE term /* require Foo */ |
b5bbe64a | 966 | { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); } |
3cd0a11a RGS |
967 | | UNIOPSUB |
968 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | |
891be019 | 969 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 | 970 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 971 | op_append_elem(OP_LIST, $2, scalar($1))); } |
891be019 | 972 | | FUNC0 /* Nullary operator */ |
b5bbe64a | 973 | { $$ = newOP($1, 0); } |
ae986130 | 974 | | FUNC0 '(' ')' |
b5bbe64a | 975 | { $$ = newOP($1, 0);} |
7eb971ee FC |
976 | | FUNC0OP /* Same as above, but op created in toke.c */ |
977 | { $$ = $1; } | |
978 | | FUNC0OP '(' ')' | |
b5bbe64a | 979 | { $$ = $1; } |
891be019 | 980 | | FUNC0SUB /* Sub treated as nullop */ |
b5bbe64a | 981 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 982 | | FUNC1 '(' ')' /* not () */ |
b5bbe64a JH |
983 | { $$ = ($1 == OP_NOT) |
984 | ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) | |
985 | : newOP($1, OPf_SPECIAL); } | |
891be019 | 986 | | FUNC1 '(' expr ')' /* not($foo) */ |
b5bbe64a | 987 | { $$ = newUNOP($1, 0, $3); } |
d63c20f2 DM |
988 | | PMFUNC /* m//, s///, qr//, tr/// */ |
989 | { | |
990 | if ( $1->op_type != OP_TRANS | |
991 | && $1->op_type != OP_TRANSR | |
992 | && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV)) | |
993 | { | |
994 | $<ival>$ = start_subparse(FALSE, CVf_ANON); | |
995 | SAVEFREESV(PL_compcv); | |
996 | } else | |
997 | $<ival>$ = 0; | |
998 | } | |
999 | '(' listexpr ')' | |
b5bbe64a | 1000 | { $$ = pmruntime($1, $4, 1, $<ival>2); } |
79072805 | 1001 | | WORD |
378cc40b | 1002 | | listop |
be25f609 | 1003 | | YADAYADA |
1004 | { | |
1005 | $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0), | |
1006 | newSVOP(OP_CONST, 0, newSVpvs("Unimplemented"))); | |
1007 | } | |
88e1f1a2 | 1008 | | PLUGEXPR |
8d063cd8 LW |
1009 | ; |
1010 | ||
891be019 | 1011 | /* "my" declarations, with optional attributes */ |
09bef843 | 1012 | myattrterm: MY myterm myattrlist |
b5bbe64a | 1013 | { $$ = my_attrs($2,$3); } |
09bef843 | 1014 | | MY myterm |
b5bbe64a | 1015 | { $$ = localize($2,$1); } |
09bef843 SB |
1016 | ; |
1017 | ||
891be019 | 1018 | /* Things that can be "my"'d */ |
09bef843 | 1019 | myterm : '(' expr ')' |
b5bbe64a | 1020 | { $$ = sawparens($2); } |
09bef843 | 1021 | | '(' ')' |
b5bbe64a JH |
1022 | { $$ = sawparens(newNULLLIST()); } |
1023 | ||
09bef843 SB |
1024 | | scalar %prec '(' |
1025 | { $$ = $1; } | |
1026 | | hsh %prec '(' | |
1027 | { $$ = $1; } | |
1028 | | ary %prec '(' | |
1029 | { $$ = $1; } | |
1030 | ; | |
1031 | ||
891be019 | 1032 | /* Basic list expressions */ |
09b1cffe | 1033 | optlistexpr: /* NULL */ %prec PREC_LOW |
bcabcc50 | 1034 | { $$ = (OP*)NULL; } |
09b1cffe | 1035 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
1036 | { $$ = $1; } |
1037 | ; | |
1038 | ||
09b1cffe | 1039 | optexpr: /* NULL */ |
bcabcc50 | 1040 | { $$ = (OP*)NULL; } |
79072805 LW |
1041 | | expr |
1042 | { $$ = $1; } | |
1043 | ; | |
1044 | ||
891be019 SC |
1045 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
1046 | lexical */ | |
55497cff | 1047 | my_scalar: scalar |
624fa8bd | 1048 | { parser->in_my = 0; $$ = my($1); } |
55497cff | 1049 | ; |
1050 | ||
d39c26a6 FC |
1051 | my_var : scalar |
1052 | | ary | |
1053 | | hsh | |
1054 | ; | |
1055 | ||
1056 | refgen_topic: my_var | |
1057 | | amper | |
1058 | ; | |
1059 | ||
79072805 | 1060 | amper : '&' indirob |
b5bbe64a | 1061 | { $$ = newCVREF($1,$2); } |
a687059c LW |
1062 | ; |
1063 | ||
79072805 | 1064 | scalar : '$' indirob |
b5bbe64a | 1065 | { $$ = newSVREF($2); } |
a687059c LW |
1066 | ; |
1067 | ||
79072805 | 1068 | ary : '@' indirob |
f05e27e5 | 1069 | { $$ = newAVREF($2); |
b5bbe64a | 1070 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1071 | } |
79072805 LW |
1072 | ; |
1073 | ||
1074 | hsh : '%' indirob | |
f05e27e5 | 1075 | { $$ = newHVREF($2); |
b5bbe64a | 1076 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1077 | } |
79072805 LW |
1078 | ; |
1079 | ||
1080 | arylen : DOLSHARP indirob | |
b5bbe64a | 1081 | { $$ = newAVREF($2); } |
ff25e5db | 1082 | | term ARROW DOLSHARP '*' |
b5bbe64a | 1083 | { $$ = newAVREF($1); } |
79072805 LW |
1084 | ; |
1085 | ||
1086 | star : '*' indirob | |
b5bbe64a | 1087 | { $$ = newGVREF(0,$2); } |
79072805 LW |
1088 | ; |
1089 | ||
89f35911 FC |
1090 | sliceme : ary |
1091 | | term ARROW '@' | |
b5bbe64a | 1092 | { $$ = newAVREF($1); } |
89f35911 FC |
1093 | ; |
1094 | ||
76eba8ab FC |
1095 | kvslice : hsh |
1096 | | term ARROW '%' | |
b5bbe64a | 1097 | { $$ = newHVREF($1); } |
76eba8ab FC |
1098 | ; |
1099 | ||
89f35911 FC |
1100 | gelem : star |
1101 | | term ARROW '*' | |
b5bbe64a | 1102 | { $$ = newGVREF(0,$1); } |
89f35911 FC |
1103 | ; |
1104 | ||
891be019 | 1105 | /* Indirect objects */ |
79072805 LW |
1106 | indirob : WORD |
1107 | { $$ = scalar($1); } | |
fad39ff1 | 1108 | | scalar %prec PREC_LOW |
f05e27e5 | 1109 | { $$ = scalar($1); } |
79072805 | 1110 | | block |
3ad73efd | 1111 | { $$ = op_scope($1); } |
79072805 | 1112 | |
93a17b20 LW |
1113 | | PRIVATEREF |
1114 | { $$ = $1; } | |
8d063cd8 | 1115 | ; |