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)); | |
121 | $$ = 0; | |
122 | } | |
78cdf107 Z |
123 | | GRAMEXPR |
124 | { | |
125 | parser->expect = XTERM; | |
126 | } | |
09b1cffe | 127 | optexpr |
78cdf107 Z |
128 | { |
129 | PL_eval_root = $3; | |
130 | $$ = 0; | |
131 | } | |
e53d8f76 Z |
132 | | GRAMBLOCK |
133 | { | |
134 | parser->expect = XBLOCK; | |
135 | } | |
136 | block | |
137 | { | |
5f211341 | 138 | PL_pad_reset_pending = TRUE; |
8359b381 Z |
139 | PL_eval_root = $3; |
140 | $$ = 0; | |
141 | yyunlex(); | |
142 | parser->yychar = YYEOF; | |
143 | } | |
144 | | GRAMBARESTMT | |
145 | { | |
146 | parser->expect = XSTATE; | |
147 | } | |
148 | barestmt | |
149 | { | |
150 | PL_pad_reset_pending = TRUE; | |
e53d8f76 Z |
151 | PL_eval_root = $3; |
152 | $$ = 0; | |
153 | yyunlex(); | |
154 | parser->yychar = YYEOF; | |
155 | } | |
9eb5c532 | 156 | | GRAMFULLSTMT |
28ac2b49 | 157 | { |
9eb5c532 Z |
158 | parser->expect = XSTATE; |
159 | } | |
160 | fullstmt | |
161 | { | |
5f211341 | 162 | PL_pad_reset_pending = TRUE; |
9eb5c532 | 163 | PL_eval_root = $3; |
28ac2b49 Z |
164 | $$ = 0; |
165 | yyunlex(); | |
166 | parser->yychar = YYEOF; | |
167 | } | |
07ffcb73 Z |
168 | | GRAMSTMTSEQ |
169 | { | |
170 | parser->expect = XSTATE; | |
171 | } | |
5f211341 | 172 | stmtseq |
07ffcb73 Z |
173 | { |
174 | PL_eval_root = $3; | |
175 | $$ = 0; | |
176 | } | |
177 | ; | |
178 | ||
891be019 | 179 | /* An ordinary block */ |
5f211341 | 180 | block : '{' remember stmtseq '}' |
624fa8bd FC |
181 | { if (parser->copline > (line_t)$1) |
182 | parser->copline = (line_t)$1; | |
f05e27e5 | 183 | $$ = block_end($2, $3); |
f05e27e5 | 184 | } |
a0d0e21e LW |
185 | ; |
186 | ||
7c70caa5 | 187 | /* format body */ |
705fe0e5 | 188 | formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.' |
624fa8bd FC |
189 | { if (parser->copline > (line_t)$1) |
190 | parser->copline = (line_t)$1; | |
705fe0e5 | 191 | $$ = block_end($2, $5); |
7c70caa5 FC |
192 | } |
193 | ; | |
194 | ||
55497cff | 195 | remember: /* NULL */ /* start a full lexical scope */ |
196 | { $$ = block_start(TRUE); } | |
197 | ; | |
198 | ||
5f211341 | 199 | mblock : '{' mremember stmtseq '}' |
624fa8bd FC |
200 | { if (parser->copline > (line_t)$1) |
201 | parser->copline = (line_t)$1; | |
f05e27e5 | 202 | $$ = block_end($2, $3); |
f05e27e5 | 203 | } |
55497cff | 204 | ; |
205 | ||
206 | mremember: /* NULL */ /* start a partial lexical scope */ | |
207 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
208 | ; |
209 | ||
eae48c89 | 210 | /* A sequence of statements in the program */ |
5f211341 | 211 | stmtseq : /* NULL */ |
bcabcc50 | 212 | { $$ = (OP*)NULL; } |
5f211341 | 213 | | stmtseq fullstmt |
2fcb4757 | 214 | { $$ = op_append_list(OP_LINESEQ, $1, $2); |
3280af22 | 215 | PL_pad_reset_pending = TRUE; |
503de470 DM |
216 | if ($1 && $2) |
217 | PL_hints |= HINT_BLOCK_SCOPE; | |
218 | } | |
8d063cd8 LW |
219 | ; |
220 | ||
705fe0e5 FC |
221 | /* A sequence of format lines */ |
222 | formstmtseq: /* NULL */ | |
223 | { $$ = (OP*)NULL; } | |
224 | | formstmtseq formline | |
225 | { $$ = op_append_list(OP_LINESEQ, $1, $2); | |
226 | PL_pad_reset_pending = TRUE; | |
227 | if ($1 && $2) | |
228 | PL_hints |= HINT_BLOCK_SCOPE; | |
229 | } | |
230 | ; | |
231 | ||
8e720305 Z |
232 | /* A statement in the program, including optional labels */ |
233 | fullstmt: barestmt | |
eae48c89 | 234 | { |
b5bbe64a | 235 | $$ = $1 ? newSTATEOP(0, NULL, $1) : NULL; |
eae48c89 | 236 | } |
8e720305 Z |
237 | | labfullstmt |
238 | { $$ = $1; } | |
239 | ; | |
240 | ||
241 | labfullstmt: LABEL barestmt | |
242 | { | |
b5bbe64a | 243 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 Z |
244 | } |
245 | | LABEL labfullstmt | |
246 | { | |
b5bbe64a | 247 | $$ = newSTATEOP(SVf_UTF8 * $1[strlen($1)+1], $1, $2); |
8e720305 | 248 | } |
eae48c89 Z |
249 | ; |
250 | ||
251 | /* A bare statement, lacking label and other aspects of state op */ | |
252 | barestmt: PLUGSTMT | |
0d863452 | 253 | { $$ = $1; } |
7c70caa5 | 254 | | FORMAT startformsub formname formblock |
f05e27e5 | 255 | { |
eae48c89 | 256 | CV *fmtcv = PL_compcv; |
eae48c89 Z |
257 | newFORM($2, $3, $4); |
258 | $$ = (OP*)NULL; | |
4a273b91 | 259 | if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) { |
eae48c89 | 260 | SvREFCNT_inc_simple_void(fmtcv); |
cc76b5cc | 261 | pad_add_anon(fmtcv, OP_NULL); |
f05e27e5 | 262 | } |
eae48c89 | 263 | } |
50278755 FC |
264 | | SUB subname startsub |
265 | { | |
266 | if ($2->op_type == OP_CONST) { | |
267 | const char *const name = | |
268 | SvPV_nolen_const(((SVOP*)$2)->op_sv); | |
269 | if (strEQ(name, "BEGIN") || strEQ(name, "END") | |
764212cf FC |
270 | || strEQ(name, "INIT") || strEQ(name, "CHECK") |
271 | || strEQ(name, "UNITCHECK")) | |
272 | CvSPECIAL_on(PL_compcv); | |
50278755 | 273 | } |
e07561e6 FC |
274 | else |
275 | /* State subs inside anonymous subs need to be | |
276 | clonable themselves. */ | |
6d5c2147 FC |
277 | if (CvANON(CvOUTSIDE(PL_compcv)) |
278 | || CvCLONE(CvOUTSIDE(PL_compcv)) | |
279 | || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST( | |
280 | CvOUTSIDE(PL_compcv) | |
281 | ))[$2->op_targ])) | |
e07561e6 | 282 | CvCLONE_on(PL_compcv); |
624fa8bd FC |
283 | parser->in_my = 0; |
284 | parser->in_my_stash = NULL; | |
764212cf | 285 | } |
30d9c59b | 286 | proto subattrlist optsubbody |
eae48c89 Z |
287 | { |
288 | SvREFCNT_inc_simple_void(PL_compcv); | |
50278755 FC |
289 | $2->op_type == OP_CONST |
290 | ? newATTRSUB($3, $2, $5, $6, $7) | |
291 | : newMYSUB($3, $2, $5, $6, $7) | |
50278755 | 292 | ; |
eae48c89 | 293 | $$ = (OP*)NULL; |
764212cf | 294 | intro_my(); |
f05e27e5 | 295 | } |
eae48c89 | 296 | | PACKAGE WORD WORD ';' |
5f211341 | 297 | { |
eae48c89 Z |
298 | package($3); |
299 | if ($2) | |
300 | package_version($2); | |
301 | $$ = (OP*)NULL; | |
eae48c89 Z |
302 | } |
303 | | USE startsub | |
304 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } | |
09b1cffe | 305 | WORD WORD optlistexpr ';' |
eae48c89 Z |
306 | { |
307 | SvREFCNT_inc_simple_void(PL_compcv); | |
b5bbe64a | 308 | utilize($1, $2, $4, $5, $6); |
eae48c89 | 309 | $$ = (OP*)NULL; |
eae48c89 | 310 | } |
417a992d | 311 | | IF '(' remember mexpr ')' mblock else |
eae48c89 | 312 | { |
3ad73efd Z |
313 | $$ = block_end($3, |
314 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 315 | parser->copline = (line_t)$1; |
eae48c89 | 316 | } |
417a992d | 317 | | UNLESS '(' remember miexpr ')' mblock else |
eae48c89 | 318 | { |
3ad73efd Z |
319 | $$ = block_end($3, |
320 | newCONDOP(0, $4, op_scope($6), $7)); | |
624fa8bd | 321 | parser->copline = (line_t)$1; |
eae48c89 | 322 | } |
b5a64814 | 323 | | GIVEN '(' remember mexpr ')' mblock |
eae48c89 | 324 | { |
b5a64814 | 325 | const PADOFFSET offset = pad_findmy_pvs("$_", 0); |
eae48c89 | 326 | $$ = block_end($3, |
b5a64814 FC |
327 | newGIVENOP($4, op_scope($6), |
328 | offset == NOT_IN_PAD | |
329 | || PAD_COMPNAME_FLAGS_isOUR(offset) | |
330 | ? 0 | |
331 | : offset)); | |
624fa8bd | 332 | parser->copline = (line_t)$1; |
eae48c89 | 333 | } |
417a992d | 334 | | WHEN '(' remember mexpr ')' mblock |
3ad73efd | 335 | { $$ = block_end($3, newWHENOP($4, op_scope($6))); } |
eae48c89 | 336 | | DEFAULT block |
3ad73efd | 337 | { $$ = newWHENOP(0, op_scope($2)); } |
417a992d | 338 | | WHILE '(' remember texpr ')' mintro mblock cont |
eae48c89 Z |
339 | { |
340 | $$ = block_end($3, | |
341 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 342 | $4, $7, $8, $6)); |
624fa8bd | 343 | parser->copline = (line_t)$1; |
eae48c89 | 344 | } |
417a992d | 345 | | UNTIL '(' remember iexpr ')' mintro mblock cont |
eae48c89 Z |
346 | { |
347 | $$ = block_end($3, | |
94bf0465 Z |
348 | newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
349 | $4, $7, $8, $6)); | |
624fa8bd | 350 | parser->copline = (line_t)$1; |
eae48c89 | 351 | } |
2d0e3c96 FC |
352 | | FOR '(' remember mnexpr ';' |
353 | { parser->expect = XTERM; } | |
354 | texpr ';' | |
355 | { parser->expect = XTERM; } | |
356 | mintro mnexpr ')' | |
eae48c89 Z |
357 | mblock |
358 | { | |
b5bbe64a | 359 | OP *initop = $4; |
eae48c89 | 360 | OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
2d0e3c96 | 361 | scalar($7), $13, $11, $10); |
eae48c89 Z |
362 | if (initop) { |
363 | forop = op_prepend_elem(OP_LINESEQ, initop, | |
364 | op_append_elem(OP_LINESEQ, | |
365 | newOP(OP_UNSTACK, OPf_SPECIAL), | |
366 | forop)); | |
5f211341 | 367 | } |
eae48c89 | 368 | $$ = block_end($3, forop); |
624fa8bd | 369 | parser->copline = (line_t)$1; |
eae48c89 | 370 | } |
417a992d | 371 | | FOR MY remember my_scalar '(' mexpr ')' mblock cont |
eae48c89 | 372 | { |
94bf0465 | 373 | $$ = block_end($3, newFOROP(0, $4, $6, $8, $9)); |
624fa8bd | 374 | parser->copline = (line_t)$1; |
eae48c89 | 375 | } |
417a992d | 376 | | FOR scalar '(' remember mexpr ')' mblock cont |
eae48c89 | 377 | { |
94bf0465 | 378 | $$ = block_end($4, newFOROP(0, |
3ad73efd | 379 | op_lvalue($2, OP_ENTERLOOP), $5, $7, $8)); |
624fa8bd | 380 | parser->copline = (line_t)$1; |
eae48c89 | 381 | } |
d39c26a6 FC |
382 | | FOR REFGEN MY remember my_var |
383 | { parser->in_my = 0; $<opval>$ = my($5); } | |
384 | '(' mexpr ')' mblock cont | |
385 | { | |
386 | $$ = block_end( | |
387 | $4, | |
388 | newFOROP(0, | |
389 | op_lvalue( | |
390 | newUNOP(OP_REFGEN, 0, | |
391 | op_lvalue($<opval>6, | |
392 | OP_REFGEN)), | |
393 | OP_ENTERLOOP), | |
394 | $8, $10, $11) | |
395 | ); | |
396 | parser->copline = (line_t)$1; | |
397 | } | |
398 | | FOR REFGEN refgen_topic '(' remember mexpr ')' mblock cont | |
399 | { | |
400 | $$ = block_end($5, newFOROP( | |
401 | 0, op_lvalue(newUNOP(OP_REFGEN, 0, | |
402 | op_lvalue($3, | |
403 | OP_REFGEN)), | |
404 | OP_ENTERLOOP), $6, $8, $9)); | |
405 | parser->copline = (line_t)$1; | |
406 | } | |
417a992d | 407 | | FOR '(' remember mexpr ')' mblock cont |
eae48c89 Z |
408 | { |
409 | $$ = block_end($3, | |
94bf0465 | 410 | newFOROP(0, (OP*)NULL, $4, $6, $7)); |
624fa8bd | 411 | parser->copline = (line_t)$1; |
eae48c89 Z |
412 | } |
413 | | block cont | |
414 | { | |
415 | /* a block is a loop that happens once */ | |
416 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, | |
94bf0465 | 417 | (OP*)NULL, $1, $2, 0); |
eae48c89 Z |
418 | } |
419 | | PACKAGE WORD WORD '{' remember | |
420 | { | |
eae48c89 | 421 | package($3); |
eae48c89 | 422 | if ($2) { |
eae48c89 | 423 | package_version($2); |
eae48c89 Z |
424 | } |
425 | } | |
426 | stmtseq '}' | |
427 | { | |
428 | /* a block is a loop that happens once */ | |
94bf0465 | 429 | $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL, |
eae48c89 | 430 | (OP*)NULL, block_end($5, $7), (OP*)NULL, 0); |
624fa8bd FC |
431 | if (parser->copline > (line_t)$4) |
432 | parser->copline = (line_t)$4; | |
eae48c89 Z |
433 | } |
434 | | sideff ';' | |
435 | { | |
eae48c89 | 436 | $$ = $1; |
eae48c89 Z |
437 | } |
438 | | ';' | |
439 | { | |
b5bbe64a | 440 | $$ = (OP*)NULL; |
624fa8bd | 441 | parser->copline = NOLINE; |
5f211341 | 442 | } |
8d063cd8 LW |
443 | ; |
444 | ||
705fe0e5 FC |
445 | /* Format line */ |
446 | formline: THING formarg | |
447 | { OP *list; | |
448 | if ($2) { | |
449 | OP *term = $2; | |
705fe0e5 FC |
450 | list = op_append_elem(OP_LIST, $1, term); |
451 | } | |
452 | else { | |
705fe0e5 | 453 | list = $1; |
705fe0e5 | 454 | } |
624fa8bd FC |
455 | if (parser->copline == NOLINE) |
456 | parser->copline = CopLINE(PL_curcop)-1; | |
457 | else parser->copline--; | |
705fe0e5 FC |
458 | $$ = newSTATEOP(0, NULL, |
459 | convert(OP_FORMLINE, 0, list)); | |
460 | } | |
461 | ; | |
462 | ||
463 | formarg : /* NULL */ | |
464 | { $$ = NULL; } | |
465 | | FORMLBRACK stmtseq FORMRBRACK | |
466 | { $$ = op_unscope($2); } | |
467 | ; | |
468 | ||
891be019 | 469 | /* An expression which may have a side-effect */ |
a687059c | 470 | sideff : error |
bcabcc50 | 471 | { $$ = (OP*)NULL; } |
a687059c | 472 | | expr |
79072805 | 473 | { $$ = $1; } |
a687059c | 474 | | expr IF expr |
b5bbe64a | 475 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 476 | | expr UNLESS expr |
b5bbe64a | 477 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 478 | | expr WHILE expr |
b5bbe64a | 479 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 480 | | expr UNTIL iexpr |
b5bbe64a | 481 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1); } |
ecca16b0 | 482 | | expr FOR expr |
94bf0465 | 483 | { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL); |
624fa8bd | 484 | parser->copline = (line_t)$2; } |
f20dcd76 | 485 | | expr WHEN expr |
3ad73efd | 486 | { $$ = newWHENOP($3, op_scope($1)); } |
79072805 LW |
487 | ; |
488 | ||
891be019 | 489 | /* else and elsif blocks */ |
79072805 | 490 | else : /* NULL */ |
bcabcc50 | 491 | { $$ = (OP*)NULL; } |
55497cff | 492 | | ELSE mblock |
3ad73efd Z |
493 | { |
494 | ($2)->op_flags |= OPf_PARENS; | |
495 | $$ = op_scope($2); | |
f05e27e5 | 496 | } |
417a992d | 497 | | ELSIF '(' mexpr ')' mblock else |
624fa8bd | 498 | { parser->copline = (line_t)$1; |
3ad73efd Z |
499 | $$ = newCONDOP(0, |
500 | newSTATEOP(OPf_SPECIAL,NULL,$3), | |
501 | op_scope($5), $6); | |
502 | PL_hints |= HINT_BLOCK_SCOPE; | |
f05e27e5 | 503 | } |
79072805 LW |
504 | ; |
505 | ||
891be019 | 506 | /* Continue blocks */ |
79072805 | 507 | cont : /* NULL */ |
bcabcc50 | 508 | { $$ = (OP*)NULL; } |
79072805 | 509 | | CONTINUE block |
b5bbe64a | 510 | { $$ = op_scope($2); } |
79072805 LW |
511 | ; |
512 | ||
a034e688 DM |
513 | /* determine whether there are any new my declarations */ |
514 | mintro : /* NULL */ | |
515 | { $$ = (PL_min_intro_pending && | |
516 | PL_max_intro_pending >= PL_min_intro_pending); | |
517 | intro_my(); } | |
518 | ||
891be019 | 519 | /* Normal expression */ |
8d063cd8 | 520 | nexpr : /* NULL */ |
bcabcc50 | 521 | { $$ = (OP*)NULL; } |
8d063cd8 LW |
522 | | sideff |
523 | ; | |
524 | ||
891be019 | 525 | /* Boolean expression */ |
8d063cd8 | 526 | texpr : /* NULL means true */ |
f05e27e5 DM |
527 | { YYSTYPE tmplval; |
528 | (void)scan_num("1", &tmplval); | |
529 | $$ = tmplval.opval; } | |
8d063cd8 LW |
530 | | expr |
531 | ; | |
532 | ||
891be019 | 533 | /* Inverted boolean expression */ |
55497cff | 534 | iexpr : expr |
535 | { $$ = invert(scalar($1)); } | |
536 | ; | |
537 | ||
891be019 | 538 | /* Expression with its own lexical scope */ |
55497cff | 539 | mexpr : expr |
bbce6d69 | 540 | { $$ = $1; intro_my(); } |
541 | ; | |
542 | ||
543 | mnexpr : nexpr | |
544 | { $$ = $1; intro_my(); } | |
55497cff | 545 | ; |
546 | ||
55497cff | 547 | miexpr : iexpr |
bbce6d69 | 548 | { $$ = $1; intro_my(); } |
55497cff | 549 | ; |
550 | ||
44a8e56a | 551 | formname: WORD { $$ = $1; } |
bcabcc50 | 552 | | /* NULL */ { $$ = (OP*)NULL; } |
8d063cd8 LW |
553 | ; |
554 | ||
fa83b5b6 | 555 | startsub: /* NULL */ /* start a regular subroutine scope */ |
a8ff2fa6 DM |
556 | { $$ = start_subparse(FALSE, 0); |
557 | SAVEFREESV(PL_compcv); } | |
f05e27e5 | 558 | |
28757baa | 559 | ; |
560 | ||
561 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
a8ff2fa6 DM |
562 | { $$ = start_subparse(FALSE, CVf_ANON); |
563 | SAVEFREESV(PL_compcv); } | |
28757baa | 564 | ; |
565 | ||
44a8e56a | 566 | startformsub: /* NULL */ /* start a format subroutine scope */ |
a8ff2fa6 DM |
567 | { $$ = start_subparse(TRUE, 0); |
568 | SAVEFREESV(PL_compcv); } | |
44a8e56a | 569 | ; |
570 | ||
891be019 | 571 | /* Name of a subroutine - must be a bareword, could be special */ |
50278755 | 572 | subname : WORD |
4210d3f1 | 573 | | PRIVATEREF |
a0d0e21e LW |
574 | ; |
575 | ||
891be019 | 576 | /* Subroutine prototype */ |
4633a7c4 | 577 | proto : /* NULL */ |
bcabcc50 | 578 | { $$ = (OP*)NULL; } |
4633a7c4 LW |
579 | | THING |
580 | ; | |
28757baa | 581 | |
891be019 | 582 | /* Optional list of subroutine attributes */ |
09bef843 | 583 | subattrlist: /* NULL */ |
bcabcc50 | 584 | { $$ = (OP*)NULL; } |
09bef843 | 585 | | COLONATTR THING |
b5bbe64a | 586 | { $$ = $2; } |
09bef843 | 587 | | COLONATTR |
b5bbe64a | 588 | { $$ = (OP*)NULL; } |
09bef843 SB |
589 | ; |
590 | ||
891be019 | 591 | /* List of attributes for a "my" variable declaration */ |
09bef843 | 592 | myattrlist: COLONATTR THING |
b5bbe64a | 593 | { $$ = $2; } |
09bef843 | 594 | | COLONATTR |
b5bbe64a | 595 | { $$ = (OP*)NULL; } |
09bef843 SB |
596 | ; |
597 | ||
30d9c59b Z |
598 | /* Optional subroutine signature */ |
599 | subsignature: /* NULL */ { $$ = (OP*)NULL; } | |
600 | | '(' | |
601 | { | |
602 | if (!FEATURE_SIGNATURES_IS_ENABLED) | |
603 | Perl_croak(aTHX_ "Experimental " | |
604 | "subroutine signatures not enabled"); | |
605 | Perl_ck_warner_d(aTHX_ | |
606 | packWARN(WARN_EXPERIMENTAL__SIGNATURES), | |
607 | "The signatures feature is experimental"); | |
608 | $<opval>$ = parse_subsignature(); | |
609 | } | |
610 | ')' | |
611 | { | |
612 | $$ = op_append_list(OP_LINESEQ, $<opval>2, | |
613 | newSTATEOP(0, NULL, sawparens(newNULLLIST()))); | |
624fa8bd | 614 | parser->expect = XBLOCK; |
30d9c59b Z |
615 | } |
616 | ; | |
617 | ||
618 | /* Subroutine body - block with optional signature */ | |
619 | realsubbody: remember subsignature '{' stmtseq '}' | |
620 | { | |
624fa8bd FC |
621 | if (parser->copline > (line_t)$3) |
622 | parser->copline = (line_t)$3; | |
30d9c59b Z |
623 | $$ = block_end($1, |
624 | op_append_list(OP_LINESEQ, $2, $4)); | |
30d9c59b Z |
625 | } |
626 | ; | |
627 | ||
628 | /* Optional subroutine body, for named subroutine declaration */ | |
629 | optsubbody: realsubbody { $$ = $1; } | |
2d0e3c96 | 630 | | ';' { $$ = (OP*)NULL; } |
8d063cd8 LW |
631 | ; |
632 | ||
891be019 | 633 | /* Ordinary expressions; logical combinations */ |
a0d0e21e | 634 | expr : expr ANDOP expr |
b5bbe64a | 635 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
a0d0e21e | 636 | | expr OROP expr |
b5bbe64a | 637 | { $$ = newLOGOP($2, 0, $1, $3); } |
c963b151 | 638 | | expr DOROP expr |
b5bbe64a | 639 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
09b1cffe | 640 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
641 | ; |
642 | ||
891be019 | 643 | /* Expressions are a list of terms joined by commas */ |
09b1cffe | 644 | listexpr: listexpr ',' |
b5bbe64a | 645 | { $$ = $1; } |
09b1cffe | 646 | | listexpr ',' term |
f05e27e5 | 647 | { |
29522234 | 648 | OP* term = $3; |
2fcb4757 | 649 | $$ = op_append_elem(OP_LIST, $1, term); |
f05e27e5 | 650 | } |
fad39ff1 | 651 | | term %prec PREC_LOW |
8d063cd8 LW |
652 | ; |
653 | ||
891be019 | 654 | /* List operators */ |
09b1cffe | 655 | listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */ |
b5bbe64a JH |
656 | { $$ = convert($1, OPf_STACKED, |
657 | op_prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); | |
f05e27e5 | 658 | } |
891be019 | 659 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
b5bbe64a JH |
660 | { $$ = convert($1, OPf_STACKED, |
661 | op_prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); | |
f05e27e5 | 662 | } |
417a992d | 663 | | term ARROW method '(' optexpr ')' /* $foo->bar(list) */ |
4633a7c4 | 664 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
665 | op_append_elem(OP_LIST, |
666 | op_prepend_elem(OP_LIST, scalar($1), $5), | |
b46e009d | 667 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 668 | } |
891be019 | 669 | | term ARROW method /* $foo->bar */ |
b1524f17 | 670 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 671 | op_append_elem(OP_LIST, scalar($1), |
b46e009d | 672 | newMETHOP(OP_METHOD, 0, $3))); |
f05e27e5 | 673 | } |
09b1cffe | 674 | | METHOD indirob optlistexpr /* new Class @args */ |
4633a7c4 | 675 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
676 | op_append_elem(OP_LIST, |
677 | op_prepend_elem(OP_LIST, $2, $3), | |
b46e009d | 678 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 679 | } |
09b1cffe | 680 | | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */ |
4633a7c4 | 681 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
682 | op_append_elem(OP_LIST, |
683 | op_prepend_elem(OP_LIST, $2, $4), | |
b46e009d | 684 | newMETHOP(OP_METHOD, 0, $1))); |
f05e27e5 | 685 | } |
09b1cffe | 686 | | LSTOP optlistexpr /* print @args */ |
b5bbe64a | 687 | { $$ = convert($1, 0, $2); } |
09b1cffe | 688 | | FUNC '(' optexpr ')' /* print (@args) */ |
b5bbe64a | 689 | { $$ = convert($1, 0, $3); } |
718a7425 | 690 | | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ |
5a5094bd | 691 | { SvREFCNT_inc_simple_void(PL_compcv); |
bcabcc50 | 692 | $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); } |
09b1cffe | 693 | optlistexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 694 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 Z |
695 | op_append_elem(OP_LIST, |
696 | op_prepend_elem(OP_LIST, $<opval>4, $5), $1)); | |
f05e27e5 | 697 | } |
a687059c LW |
698 | ; |
699 | ||
891be019 | 700 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
701 | method : METHOD |
702 | | scalar | |
703 | ; | |
704 | ||
891be019 | 705 | /* Some kind of subscripted expression */ |
89f35911 | 706 | subscripted: gelem '{' expr ';' '}' /* *main::{something} */ |
891be019 SC |
707 | /* In this and all the hash accessors, ';' is |
708 | * provided by the tokeniser */ | |
5c86b6df | 709 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } |
891be019 | 710 | | scalar '[' expr ']' /* $array[$element] */ |
f05e27e5 | 711 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); |
f05e27e5 | 712 | } |
891be019 | 713 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
714 | { $$ = newBINOP(OP_AELEM, 0, |
715 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 716 | scalar($4)); |
f05e27e5 | 717 | } |
891be019 | 718 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
719 | { $$ = newBINOP(OP_AELEM, 0, |
720 | ref(newAVREF($1),OP_RV2AV), | |
f05e27e5 | 721 | scalar($3)); |
f05e27e5 | 722 | } |
5a63ceef | 723 | | scalar '{' expr ';' '}' /* $foo{bar();} */ |
fad39ff1 | 724 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
f05e27e5 | 725 | } |
891be019 | 726 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
727 | { $$ = newBINOP(OP_HELEM, 0, |
728 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 729 | jmaybe($4)); } |
891be019 | 730 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
731 | { $$ = newBINOP(OP_HELEM, 0, |
732 | ref(newHVREF($1),OP_RV2HV), | |
5c86b6df | 733 | jmaybe($3)); } |
891be019 | 734 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 | 735 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 736 | newCVREF(0, scalar($1))); } |
891be019 | 737 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 | 738 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 739 | op_append_elem(OP_LIST, $4, |
b5bbe64a | 740 | newCVREF(0, scalar($1)))); } |
fad39ff1 | 741 | |
417a992d | 742 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 | 743 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 744 | op_append_elem(OP_LIST, $3, |
b5bbe64a | 745 | newCVREF(0, scalar($1)))); } |
417a992d | 746 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 | 747 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
b5bbe64a | 748 | newCVREF(0, scalar($1))); } |
9a9798c2 | 749 | | '(' expr ')' '[' expr ']' /* list slice */ |
b5bbe64a | 750 | { $$ = newSLICEOP(0, $5, $2); } |
ea25a9b2 | 751 | | QWLIST '[' expr ']' /* list literal slice */ |
b5bbe64a | 752 | { $$ = newSLICEOP(0, $3, $1); } |
9a9798c2 | 753 | | '(' ')' '[' expr ']' /* empty list slice! */ |
b5bbe64a | 754 | { $$ = newSLICEOP(0, $4, (OP*)NULL); } |
891be019 | 755 | ; |
fad39ff1 | 756 | |
891be019 | 757 | /* Binary operators between terms */ |
f05e27e5 | 758 | termbinop: term ASSIGNOP term /* $x = $y */ |
b5bbe64a | 759 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 760 | | term POWOP term /* $x ** $y */ |
b5bbe64a | 761 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 762 | | term MULOP term /* $x * $y, $x x $y */ |
b5bbe64a | 763 | { if ($2 != OP_REPEAT) |
79072805 | 764 | scalar($1); |
b5bbe64a | 765 | $$ = newBINOP($2, 0, $1, scalar($3)); |
f05e27e5 | 766 | } |
891be019 | 767 | | term ADDOP term /* $x + $y */ |
b5bbe64a | 768 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 769 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
b5bbe64a | 770 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 771 | | term RELOP term /* $x > $y, etc. */ |
b5bbe64a | 772 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 773 | | term EQOP term /* $x == $y, $x eq $y */ |
b5bbe64a | 774 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 775 | | term BITANDOP term /* $x & $y */ |
b5bbe64a | 776 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 777 | | term BITOROP term /* $x | $y */ |
b5bbe64a | 778 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 779 | | term DOTDOT term /* $x..$y, $x...$y */ |
b5bbe64a | 780 | { $$ = newRANGE($2, scalar($1), scalar($3)); } |
891be019 | 781 | | term ANDAND term /* $x && $y */ |
b5bbe64a | 782 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 783 | | term OROR term /* $x || $y */ |
b5bbe64a | 784 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 | 785 | | term DORDOR term /* $x // $y */ |
b5bbe64a | 786 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
891be019 | 787 | | term MATCHOP term /* $x =~ /$y/ */ |
b5bbe64a | 788 | { $$ = bind_match($2, $1, $3); } |
891be019 | 789 | ; |
8d063cd8 | 790 | |
891be019 SC |
791 | /* Unary operators and terms */ |
792 | termunop : '-' term %prec UMINUS /* -$x */ | |
b5bbe64a | 793 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 794 | | '+' term %prec UMINUS /* +$x */ |
b5bbe64a JH |
795 | { $$ = $2; } |
796 | ||
891be019 | 797 | | '!' term /* !$x */ |
b5bbe64a | 798 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 799 | | '~' term /* ~$x */ |
b5bbe64a | 800 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2)); } |
891be019 | 801 | | term POSTINC /* $x++ */ |
79072805 | 802 | { $$ = newUNOP(OP_POSTINC, 0, |
b5bbe64a | 803 | op_lvalue(scalar($1), OP_POSTINC)); } |
891be019 | 804 | | term POSTDEC /* $x-- */ |
79072805 | 805 | { $$ = newUNOP(OP_POSTDEC, 0, |
b5bbe64a | 806 | op_lvalue(scalar($1), OP_POSTDEC));} |
cc624add FC |
807 | | term POSTJOIN /* implicit join after interpolated ->@ */ |
808 | { $$ = convert(OP_JOIN, 0, | |
809 | op_append_elem( | |
810 | OP_LIST, | |
811 | newSVREF(scalar( | |
812 | newSVOP(OP_CONST,0, | |
813 | newSVpvs("\"")) | |
814 | )), | |
815 | $1 | |
816 | )); | |
cc624add | 817 | } |
891be019 | 818 | | PREINC term /* ++$x */ |
79072805 | 819 | { $$ = newUNOP(OP_PREINC, 0, |
b5bbe64a | 820 | op_lvalue(scalar($2), OP_PREINC)); } |
891be019 | 821 | | PREDEC term /* --$x */ |
79072805 | 822 | { $$ = newUNOP(OP_PREDEC, 0, |
b5bbe64a | 823 | op_lvalue(scalar($2), OP_PREDEC)); } |
891be019 SC |
824 | |
825 | ; | |
826 | ||
827 | /* Constructors for anonymous data */ | |
828 | anonymous: '[' expr ']' | |
b5bbe64a | 829 | { $$ = newANONLIST($2); } |
891be019 | 830 | | '[' ']' |
b5bbe64a | 831 | { $$ = newANONLIST((OP*)NULL);} |
891be019 | 832 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ |
b5bbe64a | 833 | { $$ = newANONHASH($2); } |
891be019 | 834 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
b5bbe64a | 835 | { $$ = newANONHASH((OP*)NULL); } |
30d9c59b | 836 | | ANONSUB startanonsub proto subattrlist realsubbody %prec '(' |
5a5094bd | 837 | { SvREFCNT_inc_simple_void(PL_compcv); |
b5bbe64a | 838 | $$ = newANONATTRSUB($2, $3, $4, $5); } |
891be019 SC |
839 | |
840 | ; | |
841 | ||
842 | /* Things called with "do" */ | |
843 | termdo : DO term %prec UNIOP /* do $filename */ | |
b5bbe64a | 844 | { $$ = dofile($2, $1);} |
891be019 | 845 | | DO block %prec '(' /* do { code */ |
b5bbe64a | 846 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));} |
891be019 SC |
847 | ; |
848 | ||
849 | term : termbinop | |
850 | | termunop | |
851 | | anonymous | |
852 | | termdo | |
e9bdcc27 | 853 | | term '?' term ':' term |
b5bbe64a | 854 | { $$ = newCONDOP(0, $1, $3, $5); } |
891be019 | 855 | | REFGEN term /* \$x, \@y, \%z */ |
b5bbe64a | 856 | { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN)); } |
09bef843 SB |
857 | | myattrterm %prec UNIOP |
858 | { $$ = $1; } | |
859 | | LOCAL term %prec UNIOP | |
b5bbe64a | 860 | { $$ = localize($2,$1); } |
a0d0e21e | 861 | | '(' expr ')' |
b5bbe64a | 862 | { $$ = sawparens($2); } |
ea25a9b2 | 863 | | QWLIST |
b5bbe64a | 864 | { $$ = $1; } |
8d063cd8 | 865 | | '(' ')' |
b5bbe64a | 866 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 867 | | scalar %prec '(' |
8d063cd8 | 868 | { $$ = $1; } |
79072805 | 869 | | star %prec '(' |
8d063cd8 | 870 | { $$ = $1; } |
79072805 | 871 | | hsh %prec '(' |
8d063cd8 | 872 | { $$ = $1; } |
79072805 | 873 | | ary %prec '(' |
8d063cd8 | 874 | { $$ = $1; } |
891be019 | 875 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 876 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
877 | | subscripted |
878 | { $$ = $1; } | |
89f35911 | 879 | | sliceme '[' expr ']' /* array slice */ |
2fcb4757 | 880 | { $$ = op_prepend_elem(OP_ASLICE, |
79072805 | 881 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
882 | newLISTOP(OP_ASLICE, 0, |
883 | list($3), | |
f05e27e5 | 884 | ref($1, OP_ASLICE))); |
429a2555 FC |
885 | if ($$ && $1) |
886 | $$->op_private |= | |
887 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 888 | } |
76eba8ab | 889 | | kvslice '[' expr ']' /* array key/value slice */ |
6dd3e0f2 RZ |
890 | { $$ = op_prepend_elem(OP_KVASLICE, |
891 | newOP(OP_PUSHMARK, 0), | |
892 | newLISTOP(OP_KVASLICE, 0, | |
893 | list($3), | |
894 | ref(oopsAV($1), OP_KVASLICE))); | |
95a31aad FC |
895 | if ($$ && $1) |
896 | $$->op_private |= | |
897 | $1->op_private & OPpSLICEWARNING; | |
6dd3e0f2 | 898 | } |
89f35911 | 899 | | sliceme '{' expr ';' '}' /* @hash{@keys} */ |
2fcb4757 | 900 | { $$ = op_prepend_elem(OP_HSLICE, |
79072805 | 901 | newOP(OP_PUSHMARK, 0), |
79072805 LW |
902 | newLISTOP(OP_HSLICE, 0, |
903 | list($3), | |
a0d0e21e | 904 | ref(oopsHV($1), OP_HSLICE))); |
429a2555 FC |
905 | if ($$ && $1) |
906 | $$->op_private |= | |
907 | $1->op_private & OPpSLICEWARNING; | |
f05e27e5 | 908 | } |
76eba8ab | 909 | | kvslice '{' expr ';' '}' /* %hash{@keys} */ |
5cae3edb RZ |
910 | { $$ = op_prepend_elem(OP_KVHSLICE, |
911 | newOP(OP_PUSHMARK, 0), | |
912 | newLISTOP(OP_KVHSLICE, 0, | |
913 | list($3), | |
914 | ref($1, OP_KVHSLICE))); | |
95a31aad FC |
915 | if ($$ && $1) |
916 | $$->op_private |= | |
917 | $1->op_private & OPpSLICEWARNING; | |
5cae3edb | 918 | } |
79072805 LW |
919 | | THING %prec '(' |
920 | { $$ = $1; } | |
891be019 | 921 | | amper /* &foo; */ |
c07a80fd | 922 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
fb602e32 | 923 | | amper '(' ')' /* &foo() or foo() */ |
f05e27e5 | 924 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); |
f05e27e5 | 925 | } |
fb602e32 | 926 | | amper '(' expr ')' /* &foo(@args) or foo(@args) */ |
f05e27e5 DM |
927 | { |
928 | $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, | |
2fcb4757 | 929 | op_append_elem(OP_LIST, $3, scalar($1))); |
f05e27e5 | 930 | } |
fb602e32 | 931 | | NOAMP subname optlistexpr /* foo @args (no parens) */ |
a0d0e21e | 932 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 933 | op_append_elem(OP_LIST, $3, scalar($2))); |
f05e27e5 | 934 | } |
89f35911 | 935 | | term ARROW '$' '*' |
b5bbe64a | 936 | { $$ = newSVREF($1); } |
89f35911 | 937 | | term ARROW '@' '*' |
b5bbe64a | 938 | { $$ = newAVREF($1); } |
89f35911 | 939 | | term ARROW '%' '*' |
b5bbe64a | 940 | { $$ = newHVREF($1); } |
89f35911 FC |
941 | | term ARROW '&' '*' |
942 | { $$ = newUNOP(OP_ENTERSUB, 0, | |
b5bbe64a | 943 | scalar(newCVREF($3,$1))); } |
89f35911 | 944 | | term ARROW '*' '*' %prec '(' |
b5bbe64a | 945 | { $$ = newGVREF(0,$1); } |
891be019 | 946 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
b5bbe64a JH |
947 | { $$ = newOP($1, OPf_SPECIAL); |
948 | PL_hints |= HINT_BLOCK_SCOPE; } | |
a0d0e21e | 949 | | LOOPEX term |
b5bbe64a | 950 | { $$ = newLOOPEX($1,$2); } |
09b1cffe | 951 | | NOTOP listexpr /* not $foo */ |
b5bbe64a | 952 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 953 | | UNIOP /* Unary op, $_ implied */ |
b5bbe64a | 954 | { $$ = newOP($1, 0); } |
f05e27e5 | 955 | | UNIOP block /* eval { foo }* */ |
b5bbe64a | 956 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 957 | | UNIOP term /* Unary op */ |
b5bbe64a | 958 | { $$ = newUNOP($1, 0, $2); } |
d2fdf8fd | 959 | | REQUIRE /* require, $_ implied */ |
b5bbe64a | 960 | { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); } |
d2fdf8fd | 961 | | REQUIRE term /* require Foo */ |
b5bbe64a | 962 | { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); } |
3cd0a11a RGS |
963 | | UNIOPSUB |
964 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } | |
891be019 | 965 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 | 966 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
2fcb4757 | 967 | op_append_elem(OP_LIST, $2, scalar($1))); } |
891be019 | 968 | | FUNC0 /* Nullary operator */ |
b5bbe64a | 969 | { $$ = newOP($1, 0); } |
ae986130 | 970 | | FUNC0 '(' ')' |
b5bbe64a | 971 | { $$ = newOP($1, 0);} |
7eb971ee FC |
972 | | FUNC0OP /* Same as above, but op created in toke.c */ |
973 | { $$ = $1; } | |
974 | | FUNC0OP '(' ')' | |
b5bbe64a | 975 | { $$ = $1; } |
891be019 | 976 | | FUNC0SUB /* Sub treated as nullop */ |
b5bbe64a | 977 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 978 | | FUNC1 '(' ')' /* not () */ |
b5bbe64a JH |
979 | { $$ = ($1 == OP_NOT) |
980 | ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) | |
981 | : newOP($1, OPf_SPECIAL); } | |
891be019 | 982 | | FUNC1 '(' expr ')' /* not($foo) */ |
b5bbe64a | 983 | { $$ = newUNOP($1, 0, $3); } |
d63c20f2 DM |
984 | | PMFUNC /* m//, s///, qr//, tr/// */ |
985 | { | |
986 | if ( $1->op_type != OP_TRANS | |
987 | && $1->op_type != OP_TRANSR | |
988 | && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV)) | |
989 | { | |
990 | $<ival>$ = start_subparse(FALSE, CVf_ANON); | |
991 | SAVEFREESV(PL_compcv); | |
992 | } else | |
993 | $<ival>$ = 0; | |
994 | } | |
995 | '(' listexpr ')' | |
b5bbe64a | 996 | { $$ = pmruntime($1, $4, 1, $<ival>2); } |
79072805 | 997 | | WORD |
378cc40b | 998 | | listop |
be25f609 | 999 | | YADAYADA |
1000 | { | |
1001 | $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0), | |
1002 | newSVOP(OP_CONST, 0, newSVpvs("Unimplemented"))); | |
1003 | } | |
88e1f1a2 | 1004 | | PLUGEXPR |
8d063cd8 LW |
1005 | ; |
1006 | ||
891be019 | 1007 | /* "my" declarations, with optional attributes */ |
09bef843 | 1008 | myattrterm: MY myterm myattrlist |
b5bbe64a | 1009 | { $$ = my_attrs($2,$3); } |
09bef843 | 1010 | | MY myterm |
b5bbe64a | 1011 | { $$ = localize($2,$1); } |
09bef843 SB |
1012 | ; |
1013 | ||
891be019 | 1014 | /* Things that can be "my"'d */ |
09bef843 | 1015 | myterm : '(' expr ')' |
b5bbe64a | 1016 | { $$ = sawparens($2); } |
09bef843 | 1017 | | '(' ')' |
b5bbe64a JH |
1018 | { $$ = sawparens(newNULLLIST()); } |
1019 | ||
09bef843 SB |
1020 | | scalar %prec '(' |
1021 | { $$ = $1; } | |
1022 | | hsh %prec '(' | |
1023 | { $$ = $1; } | |
1024 | | ary %prec '(' | |
1025 | { $$ = $1; } | |
1026 | ; | |
1027 | ||
891be019 | 1028 | /* Basic list expressions */ |
09b1cffe | 1029 | optlistexpr: /* NULL */ %prec PREC_LOW |
bcabcc50 | 1030 | { $$ = (OP*)NULL; } |
09b1cffe | 1031 | | listexpr %prec PREC_LOW |
a0d0e21e LW |
1032 | { $$ = $1; } |
1033 | ; | |
1034 | ||
09b1cffe | 1035 | optexpr: /* NULL */ |
bcabcc50 | 1036 | { $$ = (OP*)NULL; } |
79072805 LW |
1037 | | expr |
1038 | { $$ = $1; } | |
1039 | ; | |
1040 | ||
891be019 SC |
1041 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
1042 | lexical */ | |
55497cff | 1043 | my_scalar: scalar |
624fa8bd | 1044 | { parser->in_my = 0; $$ = my($1); } |
55497cff | 1045 | ; |
1046 | ||
d39c26a6 FC |
1047 | my_var : scalar |
1048 | | ary | |
1049 | | hsh | |
1050 | ; | |
1051 | ||
1052 | refgen_topic: my_var | |
1053 | | amper | |
1054 | ; | |
1055 | ||
79072805 | 1056 | amper : '&' indirob |
b5bbe64a | 1057 | { $$ = newCVREF($1,$2); } |
a687059c LW |
1058 | ; |
1059 | ||
79072805 | 1060 | scalar : '$' indirob |
b5bbe64a | 1061 | { $$ = newSVREF($2); } |
a687059c LW |
1062 | ; |
1063 | ||
79072805 | 1064 | ary : '@' indirob |
f05e27e5 | 1065 | { $$ = newAVREF($2); |
b5bbe64a | 1066 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1067 | } |
79072805 LW |
1068 | ; |
1069 | ||
1070 | hsh : '%' indirob | |
f05e27e5 | 1071 | { $$ = newHVREF($2); |
b5bbe64a | 1072 | if ($$) $$->op_private |= $1; |
f05e27e5 | 1073 | } |
79072805 LW |
1074 | ; |
1075 | ||
1076 | arylen : DOLSHARP indirob | |
b5bbe64a | 1077 | { $$ = newAVREF($2); } |
ff25e5db | 1078 | | term ARROW DOLSHARP '*' |
b5bbe64a | 1079 | { $$ = newAVREF($1); } |
79072805 LW |
1080 | ; |
1081 | ||
1082 | star : '*' indirob | |
b5bbe64a | 1083 | { $$ = newGVREF(0,$2); } |
79072805 LW |
1084 | ; |
1085 | ||
89f35911 FC |
1086 | sliceme : ary |
1087 | | term ARROW '@' | |
b5bbe64a | 1088 | { $$ = newAVREF($1); } |
89f35911 FC |
1089 | ; |
1090 | ||
76eba8ab FC |
1091 | kvslice : hsh |
1092 | | term ARROW '%' | |
b5bbe64a | 1093 | { $$ = newHVREF($1); } |
76eba8ab FC |
1094 | ; |
1095 | ||
89f35911 FC |
1096 | gelem : star |
1097 | | term ARROW '*' | |
b5bbe64a | 1098 | { $$ = newGVREF(0,$1); } |
89f35911 FC |
1099 | ; |
1100 | ||
891be019 | 1101 | /* Indirect objects */ |
79072805 LW |
1102 | indirob : WORD |
1103 | { $$ = scalar($1); } | |
fad39ff1 | 1104 | | scalar %prec PREC_LOW |
f05e27e5 | 1105 | { $$ = scalar($1); } |
79072805 | 1106 | | block |
3ad73efd | 1107 | { $$ = op_scope($1); } |
79072805 | 1108 | |
93a17b20 LW |
1109 | | PRIVATEREF |
1110 | { $$ = $1; } | |
8d063cd8 | 1111 | ; |