This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
stop eval "sub{" leaking
[perl5.git] / madly.y
1 /*    perly.y
2  *
3  *    Copyright (c) 1991-2002, 2003, 2004 Larry Wall
4  *
5  *    You may distribute under the terms of either the GNU General Public
6  *    License or the Artistic License, as specified in the README file.
7  *
8  */
9
10 /*
11  * 'I see,' laughed Strider.  'I look foul and feel fair.  Is that it?
12  * All that is gold does not glitter, not all those who wander are lost.'
13  */
14
15 /*  Make the parser re-entrant. */
16
17 /* FIXME for MAD - is the new mintro on while and until important?  */
18 %pure_parser
19
20 %start prog
21
22 %union {
23     I32 ival;
24     char *pval;
25     TOKEN* tkval;
26     OP *opval;
27     GV *gvval;
28 }
29
30 %token <tkval> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*'
31
32 %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF
33 %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB
34 %token <tkval> LABEL
35 %token <tkval> FORMAT SUB ANONSUB PACKAGE USE
36 %token <tkval> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
37 %token <tkval> GIVEN WHEN DEFAULT
38 %token <tkval> LOOPEX DOTDOT
39 %token <tkval> FUNC0 FUNC1 FUNC UNIOP LSTOP
40 %token <tkval> RELOP EQOP MULOP ADDOP
41 %token <tkval> DOLSHARP DO HASHBRACK NOAMP
42 %token <tkval> LOCAL MY MYSUB REQUIRE
43 %token <tkval> COLONATTR
44
45 %type <ival> prog progstart remember mremember savescope
46 %type <ival>  startsub startanonsub startformsub
47 /* FIXME for MAD - are these two ival? */
48 %type <ival> mydefsv mintro
49
50 %type <tkval> '&' ';'
51
52 %type <opval> decl format subrout mysubrout package use peg
53
54 %type <opval> block mblock lineseq line loop cond else
55 %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
56 %type <opval> argexpr nexpr texpr iexpr mexpr mnexpr miexpr
57 %type <opval> listexpr listexprcom indirob listop method
58 %type <opval> formname subname proto subbody cont my_scalar
59 %type <opval> subattrlist myattrlist myattrterm myterm
60 %type <opval> termbinop termunop anonymous termdo
61 %type <opval> switch case
62 %type <tkval> label
63
64 %nonassoc <tkval> PREC_LOW
65 %nonassoc LOOPEX
66
67 %left <tkval> OROP DOROP
68 %left <tkval> ANDOP
69 %right <tkval> NOTOP
70 %nonassoc LSTOP LSTOPSUB
71 %left <tkval> ','
72 %right <tkval> ASSIGNOP
73 %right <tkval> '?' ':'
74 %nonassoc DOTDOT
75 %left <tkval> OROR DORDOR
76 %left <tkval> ANDAND
77 %left <tkval> BITOROP
78 %left <tkval> BITANDOP
79 %nonassoc EQOP
80 %nonassoc RELOP
81 %nonassoc UNIOP UNIOPSUB
82 %nonassoc REQUIRE
83 %left <tkval> SHIFTOP
84 %left ADDOP
85 %left MULOP
86 %left <tkval> MATCHOP
87 %right <tkval> '!' '~' UMINUS REFGEN
88 %right <tkval> POWOP
89 %nonassoc <tkval> PREINC PREDEC POSTINC POSTDEC
90 %left <tkval> ARROW
91 %nonassoc <tkval> ')'
92 %left <tkval> '('
93 %left '[' '{'
94
95 %token <tkval> PEG
96
97 %% /* RULES */
98
99 /* The whole program */
100 prog    :       progstart
101         /*CONTINUED*/   lineseq
102                         { $$ = $1; newPROG(block_end($1,$2)); }
103         ;
104
105 /* An ordinary block */
106 block   :       '{' remember lineseq '}'
107                         { if (PL_copline > (line_t)($1)->tk_lval.ival)
108                               PL_copline = (line_t)($1)->tk_lval.ival;
109                           $$ = block_end($2, $3);
110                           token_getmad($1,$$,'{');
111                           token_getmad($4,$$,'}');
112                         }
113         ;
114
115 remember:       /* NULL */      /* start a full lexical scope */
116                         { $$ = block_start(TRUE); }
117         ;
118
119 mydefsv:        /* NULL */      /* lexicalize $_ */
120                         { $$ = (I32) allocmy("$_"); }
121         ;
122
123 progstart:
124                 {
125                     PL_expect = XSTATE; $$ = block_start(TRUE);
126                 }
127         ;
128
129
130 mblock  :       '{' mremember lineseq '}'
131                         { if (PL_copline > (line_t)($1)->tk_lval.ival)
132                               PL_copline = (line_t)($1)->tk_lval.ival;
133                           $$ = block_end($2, $3);
134                           token_getmad($1,$$,'{');
135                           token_getmad($4,$$,'}');
136                         }
137         ;
138
139 mremember:      /* NULL */      /* start a partial lexical scope */
140                         { $$ = block_start(FALSE); }
141         ;
142
143 savescope:      /* NULL */      /* remember stack pos in case of error */
144                 { $$ = PL_savestack_ix; }
145
146 /* A collection of "lines" in the program */
147 lineseq :       /* NULL */
148                         { $$ = Nullop; }
149         |       lineseq decl
150 /*                      { $$ = $1 } */
151                         { $$ = append_list(OP_LINESEQ,
152                                 (LISTOP*)$1, (LISTOP*)$2); }
153         |       lineseq savescope line
154                         {   LEAVE_SCOPE($2);
155                             $$ = append_list(OP_LINESEQ,
156                                 (LISTOP*)$1, (LISTOP*)$3);
157                             PL_pad_reset_pending = TRUE;
158                             if ($1 && $3) PL_hints |= HINT_BLOCK_SCOPE; }
159         ;
160
161 /* A "line" in the program */
162 line    :       label cond
163                         { $$ = newSTATEOP(0, ($1)->tk_lval.pval, $2);
164                           token_getmad($1,((LISTOP*)$$)->op_first,'L'); }
165         |       loop    /* loops add their own labels */
166         |       switch  /* ... and so do switches */
167                         { $$ = $1; }
168         |       label case
169                         { $$ = newSTATEOP(0, ($1)->tk_lval.pval, $2); }
170         |       label ';'
171                         {
172                           if (($1)->tk_lval.pval) {
173                               $$ = newSTATEOP(0, ($1)->tk_lval.pval, newOP(OP_NULL, 0));
174                               token_getmad($1,$$,'L');
175                               token_getmad($2,((LISTOP*)$$)->op_first,';');
176                           }
177                           else {
178                               $$ = newOP(OP_NULL, 0);
179                               PL_copline = NOLINE;
180                               token_free($1);
181                               token_getmad($2,$$,';');
182                           }
183                           PL_expect = XSTATE;
184                         }
185         |       label sideff ';'
186                         { OP* op;
187                           $$ = newSTATEOP(0, ($1)->tk_lval.pval, $2);
188                           PL_expect = XSTATE;
189                           /* sideff might already have a nexstate */
190                           op = ((LISTOP*)$$)->op_first;
191                           if (op) {
192                               while (op->op_sibling &&
193                                  op->op_sibling->op_type == OP_NEXTSTATE)
194                                     op = op->op_sibling;
195                               token_getmad($1,op,'L');
196                               token_getmad($3,op,';');
197                           }
198                         }
199         ;
200
201 /* An expression which may have a side-effect */
202 sideff  :       error
203                         { $$ = Nullop; }
204         |       expr
205                         { $$ = $1; }
206         |       expr IF expr
207                         { $$ = newLOGOP(OP_AND, 0, $3, $1);
208                           token_getmad($2,$$,'i');
209                         }
210         |       expr UNLESS expr
211                         { $$ = newLOGOP(OP_OR, 0, $3, $1);
212                           token_getmad($2,$$,'i');
213                         }
214         |       expr WHILE expr
215                         { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1);
216                           token_getmad($2,$$,'w');
217                         }
218         |       expr UNTIL iexpr
219                         { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);
220                           token_getmad($2,$$,'w');
221                         }
222         |       expr FOR expr
223                         { $$ = newFOROP(0, Nullch, (line_t)($2)->tk_lval.ival,
224                                         Nullop, $3, $1, Nullop);
225                           token_getmad($2,((LISTOP*)$$)->op_first->op_sibling,'w');
226                         }
227         ;
228
229 /* else and elsif blocks */
230 else    :       /* NULL */
231                         { $$ = Nullop; }
232         |       ELSE mblock
233                         { ($2)->op_flags |= OPf_PARENS; $$ = scope($2);
234                           token_getmad($1,$$,'o');
235                         }
236         |       ELSIF '(' mexpr ')' mblock else
237                         { PL_copline = (line_t)($1)->tk_lval.ival;
238                             $$ = newCONDOP(0, $3, scope($5), $6);
239                             PL_hints |= HINT_BLOCK_SCOPE;
240                           token_getmad($1,$$,'I');
241                           token_getmad($2,$$,'(');
242                           token_getmad($4,$$,')');
243                         }
244         ;
245
246 /* Real conditional expressions */
247 cond    :       IF '(' remember mexpr ')' mblock else
248                         { PL_copline = (line_t)($1)->tk_lval.ival;
249                             $$ = block_end($3,
250                                    newCONDOP(0, $4, scope($6), $7));
251                           token_getmad($1,$$,'I');
252                           token_getmad($2,$$,'(');
253                           token_getmad($5,$$,')');
254                         }
255         |       UNLESS '(' remember miexpr ')' mblock else
256                         { PL_copline = (line_t)($1)->tk_lval.ival;
257                             $$ = block_end($3,
258                                    newCONDOP(0, $4, scope($6), $7));
259                           token_getmad($1,$$,'I');
260                           token_getmad($2,$$,'(');
261                           token_getmad($5,$$,')');
262                         }
263         ;
264
265 /* Cases for a switch statement */
266 case    :       WHEN '(' remember mexpr ')' mblock
267         { $$ = block_end($3,
268                 newWHENOP($4, scope($6))); }
269         |       DEFAULT block
270         { $$ = newWHENOP(0, scope($2)); }
271         ;
272
273 /* Continue blocks */
274 cont    :       /* NULL */
275                         { $$ = Nullop; }
276         |       CONTINUE block
277                         { $$ = scope($2);
278                           token_getmad($1,$$,'o');
279                         }
280         ;
281
282 /* Loops: while, until, for, and a bare block */
283 loop    :       label WHILE '(' remember texpr ')' mintro mblock cont
284                         { OP *innerop;
285                           PL_copline = (line_t)$2;
286                             $$ = block_end($4,
287                                    newSTATEOP(0, ($1)->tk_lval.pval,
288                                      innerop = newWHILEOP(0, 1, (LOOP*)Nullop,
289                                                 ($2)->tk_lval.ival, $5, $8, $9, $7)));
290                           token_getmad($1,innerop,'L');
291                           token_getmad($2,innerop,'W');
292                           token_getmad($3,innerop,'(');
293                           token_getmad($6,innerop,')');
294                         }
295
296         |       label UNTIL '(' remember iexpr ')' mintro mblock cont
297                         { OP *innerop;
298                           PL_copline = (line_t)$2;
299                             $$ = block_end($4,
300                                    newSTATEOP(0, ($1)->tk_lval.pval,
301                                      newWHILEOP(0, 1, (LOOP*)Nullop,
302                                                 ($2)->tk_lval.ival, $5, $8, $9, $7)));
303                           token_getmad($1,innerop,'L');
304                           token_getmad($2,innerop,'W');
305                           token_getmad($3,innerop,'(');
306                           token_getmad($6,innerop,')');
307                         }
308         |       label FOR MY remember my_scalar '(' mexpr ')' mblock cont
309                         { OP *innerop;
310                           $$ = block_end($4,
311                              innerop = newFOROP(0, ($1)->tk_lval.pval, (line_t)($2)->tk_lval.ival, $5, $7, $9, $10));
312                           token_getmad($1,((LISTOP*)innerop)->op_first,'L');
313                           token_getmad($2,((LISTOP*)innerop)->op_first->op_sibling,'W');
314                           token_getmad($3,((LISTOP*)innerop)->op_first->op_sibling,'d');
315                           token_getmad($6,((LISTOP*)innerop)->op_first->op_sibling,'(');
316                           token_getmad($8,((LISTOP*)innerop)->op_first->op_sibling,')');
317                         }
318         |       label FOR scalar '(' remember mexpr ')' mblock cont
319                         { OP *innerop;
320                           $$ = block_end($5,
321                              innerop = newFOROP(0, ($1)->tk_lval.pval, (line_t)($2)->tk_lval.ival, mod($3, OP_ENTERLOOP),
322                                           $6, $8, $9));
323                           token_getmad($1,((LISTOP*)innerop)->op_first,'L');
324                           token_getmad($2,((LISTOP*)innerop)->op_first->op_sibling,'W');
325                           token_getmad($4,((LISTOP*)innerop)->op_first->op_sibling,'(');
326                           token_getmad($7,((LISTOP*)innerop)->op_first->op_sibling,')');
327                         }
328         |       label FOR '(' remember mexpr ')' mblock cont
329                         { OP *innerop;
330                           $$ = block_end($4,
331                              innerop = newFOROP(0, ($1)->tk_lval.pval, (line_t)($2)->tk_lval.ival, Nullop, $5, $7, $8));
332                           token_getmad($1,((LISTOP*)innerop)->op_first,'L');
333                           token_getmad($2,((LISTOP*)innerop)->op_first->op_sibling,'W');
334                           token_getmad($3,((LISTOP*)innerop)->op_first->op_sibling,'(');
335                           token_getmad($6,((LISTOP*)innerop)->op_first->op_sibling,')');
336                         }
337         |       label FOR '(' remember mnexpr ';' texpr ';' mintro mnexpr ')'
338                     mblock
339                         /* basically fake up an initialize-while lineseq */
340                         { OP *forop;
341                           PL_copline = (line_t)($2)->tk_lval.ival;
342                           forop = newSTATEOP(0, ($1)->tk_lval.pval,
343                                             newWHILEOP(0, 1, (LOOP*)Nullop,
344                                                 ($2)->tk_lval.ival, scalar($7),
345                                                 $12, $10, $9));
346                           if (!$5)
347                                 $5 = newOP(OP_NULL, 0);
348                           forop = newUNOP(OP_NULL, 0, append_elem(OP_LINESEQ,
349                                 newSTATEOP(0,
350                                            (($1)->tk_lval.pval
351                                            ?savepv(($1)->tk_lval.pval):Nullch),
352                                            $5),
353                                 forop));
354
355                           token_getmad($2,forop,'3');
356                           token_getmad($3,forop,'(');
357                           token_getmad($6,forop,'1');
358                           token_getmad($8,forop,'2');
359                           token_getmad($11,forop,')');
360                           token_getmad($1,forop,'L');
361                           $$ = block_end($4, forop); }
362         |       label block cont  /* a block is a loop that happens once */
363                         { $$ = newSTATEOP(0, ($1)->tk_lval.pval,
364                                  newWHILEOP(0, 1, (LOOP*)Nullop,
365                                             NOLINE, Nullop, $2, $3, 0));
366                           token_getmad($1,((LISTOP*)$$)->op_first,'L'); }
367         ;
368
369 /* Switch blocks */
370 switch  :       label GIVEN '(' remember mydefsv mexpr ')' mblock
371                         { PL_copline = (line_t) $2;
372                             $$ = block_end($4,
373                                 newSTATEOP(0, ($1)->tk_lval.pval,
374                                     newGIVENOP($6, scope($8),
375                                         (PADOFFSET) $5) )); }
376         ;
377
378 /* determine whether there are any new my declarations */
379 mintro  :       /* NULL */
380                         { $$ = (PL_min_intro_pending &&
381                             PL_max_intro_pending >=  PL_min_intro_pending);
382                           intro_my(); }
383
384 /* Normal expression */
385 nexpr   :       /* NULL */
386                         { $$ = Nullop; }
387         |       sideff
388         ;
389
390 /* Boolean expression */
391 texpr   :       /* NULL means true */
392                         { YYSTYPE tmplval;
393                           (void)scan_num("1", &tmplval);
394                           $$ = tmplval.opval; }
395         |       expr
396         ;
397
398 /* Inverted boolean expression */
399 iexpr   :       expr
400                         { $$ = invert(scalar($1)); }
401         ;
402
403 /* Expression with its own lexical scope */
404 mexpr   :       expr
405                         { $$ = $1; intro_my(); }
406         ;
407
408 mnexpr  :       nexpr
409                         { $$ = $1; intro_my(); }
410         ;
411
412 miexpr  :       iexpr
413                         { $$ = $1; intro_my(); }
414         ;
415
416 /* Optional "MAIN:"-style loop labels */
417 label   :       /* empty */
418                         { YYSTYPE tmplval;
419                           tmplval.pval = Nullch;
420                           $$ = newTOKEN(OP_NULL, tmplval, 0); }
421         |       LABEL
422         ;
423
424 /* Some kind of declaration - just hang on peg in the parse tree */
425 decl    :       format
426                         { $$ = $1; }
427         |       subrout
428                         { $$ = $1; }
429         |       mysubrout
430                         { $$ = $1; }
431         |       package
432                         { $$ = $1; }
433         |       use
434                         { $$ = $1; }
435         |       peg
436                         { $$ = $1; }
437         ;
438
439 peg     :       PEG
440                         { $$ = newOP(OP_NULL,0);
441                           token_getmad($1,$$,'p');
442                         }
443         ;
444
445 format  :       FORMAT startformsub formname block
446                         { SvREFCNT_inc(PL_compcv);
447                           $$ = newFORM($2, $3, $4);
448                           prepend_madprops($1->tk_mad, $$, 'F');
449                           $1->tk_mad = 0;
450                           token_free($1);
451                         }
452         ;
453
454 formname:       WORD            { $$ = $1; }
455         |       /* NULL */      { $$ = Nullop; }
456         ;
457
458 /* Unimplemented "my sub foo { }" */
459 mysubrout:      MYSUB startsub subname proto subattrlist subbody
460                         { SvREFCNT_inc(PL_compcv);
461                           $$ = newMYSUB($2, $3, $4, $5, $6);
462                           token_getmad($1,$$,'d');
463                         }
464         ;
465
466 /* Subroutine definition */
467 subrout :       SUB startsub subname proto subattrlist subbody
468                         { SvREFCNT_inc(PL_compcv);
469                           OP* o = newSVOP(OP_ANONCODE, 0,
470                             (SV*)newATTRSUB($2, $3, $4, $5, $6));
471                           $$ = newOP(OP_NULL,0);
472                           op_getmad(o,$$,'&');
473                           op_getmad($3,$$,'n');
474                           op_getmad($4,$$,'s');
475                           op_getmad($5,$$,'a');
476                           token_getmad($1,$$,'d');
477                           append_madprops($6->op_madprop, $$, 0);
478                           $6->op_madprop = 0;
479                         }
480         ;
481
482 startsub:       /* NULL */      /* start a regular subroutine scope */
483                         { $$ = start_subparse(FALSE, 0);
484                             SAVEFREESV(PL_compcv); }
485
486         ;
487
488 startanonsub:   /* NULL */      /* start an anonymous subroutine scope */
489                         { $$ = start_subparse(FALSE, CVf_ANON);
490                             SAVEFREESV(PL_compcv); }
491         ;
492
493 startformsub:   /* NULL */      /* start a format subroutine scope */
494                         { $$ = start_subparse(TRUE, 0);
495                             SAVEFREESV(PL_compcv); }
496         ;
497
498 /* Name of a subroutine - must be a bareword, could be special */
499 subname :       WORD    { const char *const name = SvPV_nolen_const(((SVOP*)$1)->op_sv);
500                           if (strEQ(name, "BEGIN") || strEQ(name, "END")
501                               || strEQ(name, "INIT") || strEQ(name, "CHECK"))
502                               CvSPECIAL_on(PL_compcv);
503                           $$ = $1; }
504         ;
505
506 /* Subroutine prototype */
507 proto   :       /* NULL */
508                         { $$ = Nullop; }
509         |       THING
510         ;
511
512 /* Optional list of subroutine attributes */
513 subattrlist:    /* NULL */
514                         { $$ = Nullop; }
515         |       COLONATTR THING
516                         { $$ = $2;
517                           token_getmad($1,$$,':');
518                         }
519         |       COLONATTR
520                         { $$ = newOP(OP_NULL, 0);
521                           token_getmad($1,$$,':');
522                         }
523         ;
524
525 /* List of attributes for a "my" variable declaration */
526 myattrlist:     COLONATTR THING
527                         { $$ = $2;
528                           token_getmad($1,$$,':');
529                         }
530         |       COLONATTR
531                         { $$ = newOP(OP_NULL, 0);
532                           token_getmad($1,$$,':');
533                         }
534         ;
535
536 /* Subroutine body - either null or a block */
537 subbody :       block   { $$ = $1; }
538         |       ';'     { $$ = newOP(OP_NULL,0); PL_expect = XSTATE;
539                           token_getmad($1,$$,';');
540                         }
541         ;
542
543 package :       PACKAGE WORD ';'
544                         { $$ = package($2);
545                           token_getmad($1,$$,'o');
546                           token_getmad($3,$$,';');
547                         }
548         ;
549
550 use     :       USE startsub
551                         { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
552                     WORD WORD listexpr ';'
553                         { SvREFCNT_inc(PL_compcv);
554                           $$ = utilize(($1)->tk_lval.ival, $2, $4, $5, $6);
555                           token_getmad($1,$$,'o');
556                           token_getmad($7,$$,';');
557                           if (PL_rsfp_filters && AvFILLp(PL_rsfp_filters) >= 0)
558                               append_madprops(newMADPROP('!', MAD_PV, "", 0), $$, 0);
559                         }
560         ;
561
562 /* Ordinary expressions; logical combinations */
563 expr    :       expr ANDOP expr
564                         { $$ = newLOGOP(OP_AND, 0, $1, $3);
565                           token_getmad($2,$$,'o');
566                         }
567         |       expr OROP expr
568                         { $$ = newLOGOP(($2)->tk_lval.ival, 0, $1, $3);
569                           token_getmad($2,$$,'o');
570                         }
571         |       expr DOROP expr
572                         { $$ = newLOGOP(OP_DOR, 0, $1, $3);
573                           token_getmad($2,$$,'o');
574                         }
575         |       argexpr %prec PREC_LOW
576         ;
577
578 /* Expressions are a list of terms joined by commas */
579 argexpr :       argexpr ','
580                         { OP* op = newNULLLIST();
581                           token_getmad($2,op,',');
582                           $$ = append_elem(OP_LIST, $1, op);
583                         }
584         |       argexpr ',' term
585                         { 
586                           $3 = newUNOP(OP_NULL, 0, $3);
587                           token_getmad($2,$3,',');
588                           $$ = append_elem(OP_LIST, $1, $3);
589                         }
590         |       term %prec PREC_LOW
591         ;
592
593 /* List operators */
594 listop  :       LSTOP indirob argexpr          /* print $fh @args */
595                         { $$ = convert(($1)->tk_lval.ival, OPf_STACKED,
596                                 prepend_elem(OP_LIST, newGVREF(($1)->tk_lval.ival,$2), $3) );
597                           token_getmad($1,$$,'o');
598                         }
599         |       FUNC '(' indirob expr ')'      /* print ($fh @args */
600                         { $$ = convert(($1)->tk_lval.ival, OPf_STACKED,
601                                 prepend_elem(OP_LIST, newGVREF(($1)->tk_lval.ival,$3), $4) );
602                           token_getmad($1,$$,'o');
603                           token_getmad($2,$$,'(');
604                           token_getmad($5,$$,')');
605                         }
606         |       term ARROW method '(' listexprcom ')' /* $foo->bar(list) */
607                         { $$ = convert(OP_ENTERSUB, OPf_STACKED,
608                                 append_elem(OP_LIST,
609                                     prepend_elem(OP_LIST, scalar($1), $5),
610                                     newUNOP(OP_METHOD, 0, $3)));
611                           token_getmad($2,$$,'A');
612                           token_getmad($4,$$,'(');
613                           token_getmad($6,$$,')');
614                         }
615         |       term ARROW method                     /* $foo->bar */
616                         { $$ = convert(OP_ENTERSUB, OPf_STACKED,
617                                 append_elem(OP_LIST, scalar($1),
618                                     newUNOP(OP_METHOD, 0, $3)));
619                           token_getmad($2,$$,'A');
620                         }
621         |       METHOD indirob listexpr              /* new Class @args */
622                         { $$ = convert(OP_ENTERSUB, OPf_STACKED,
623                                 append_elem(OP_LIST,
624                                     prepend_elem(OP_LIST, $2, $3),
625                                     newUNOP(OP_METHOD, 0, $1)));
626                         }
627         |       FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */
628                         { $$ = convert(OP_ENTERSUB, OPf_STACKED,
629                                 append_elem(OP_LIST,
630                                     prepend_elem(OP_LIST, $2, $4),
631                                     newUNOP(OP_METHOD, 0, $1)));
632                           token_getmad($3,$$,'(');
633                           token_getmad($5,$$,')');
634                         }
635         |       LSTOP listexpr                       /* print @args */
636                         { $$ = convert(($1)->tk_lval.ival, 0, $2);
637                           token_getmad($1,$$,'o');
638                         }
639         |       FUNC '(' listexprcom ')'             /* print (@args) */
640                         { $$ = convert(($1)->tk_lval.ival, 0, $3);
641                           token_getmad($1,$$,'o');
642                           token_getmad($2,$$,'(');
643                           token_getmad($4,$$,')');
644                         }
645         |       LSTOPSUB startanonsub block          /* map { foo } ... */
646                         { SvREFCNT_inc(PL_compcv);
647                           $3 = newANONATTRSUB($2, 0, Nullop, $3); }
648                     listexpr            %prec LSTOP  /* ... @bar */
649                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
650                                  append_elem(OP_LIST,
651                                    prepend_elem(OP_LIST, $3, $5), $1));
652                         }
653         ;
654
655 /* Names of methods. May use $object->$methodname */
656 method  :       METHOD
657         |       scalar
658         ;
659
660 /* Some kind of subscripted expression */
661 subscripted:    star '{' expr ';' '}'        /* *main::{something} */
662                         /* In this and all the hash accessors, ';' is
663                          * provided by the tokeniser */
664                         { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3));
665                             PL_expect = XOPERATOR;
666                           token_getmad($2,$$,'{');
667                           token_getmad($4,$$,';');
668                           token_getmad($5,$$,'}');
669                         }
670         |       scalar '[' expr ']'          /* $array[$element] */
671                         { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3));
672                           token_getmad($2,$$,'[');
673                           token_getmad($4,$$,']');
674                         }
675         |       term ARROW '[' expr ']'      /* somearef->[$element] */
676                         { $$ = newBINOP(OP_AELEM, 0,
677                                         ref(newAVREF($1),OP_RV2AV),
678                                         scalar($4));
679                           token_getmad($2,$$,'a');
680                           token_getmad($3,$$,'[');
681                           token_getmad($5,$$,']');
682                         }
683         |       subscripted '[' expr ']'    /* $foo->[$bar]->[$baz] */
684                         { $$ = newBINOP(OP_AELEM, 0,
685                                         ref(newAVREF($1),OP_RV2AV),
686                                         scalar($3));
687                           token_getmad($2,$$,'[');
688                           token_getmad($4,$$,']');
689                         }
690         |       scalar '{' expr ';' '}'    /* $foo->{bar();} */
691                         { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
692                             PL_expect = XOPERATOR;
693                           token_getmad($2,$$,'{');
694                           token_getmad($4,$$,';');
695                           token_getmad($5,$$,'}');
696                         }
697         |       term ARROW '{' expr ';' '}' /* somehref->{bar();} */
698                         { $$ = newBINOP(OP_HELEM, 0,
699                                         ref(newHVREF($1),OP_RV2HV),
700                                         jmaybe($4));
701                             PL_expect = XOPERATOR;
702                           token_getmad($2,$$,'a');
703                           token_getmad($3,$$,'{');
704                           token_getmad($5,$$,';');
705                           token_getmad($6,$$,'}');
706                         }
707         |       subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */
708                         { $$ = newBINOP(OP_HELEM, 0,
709                                         ref(newHVREF($1),OP_RV2HV),
710                                         jmaybe($3));
711                             PL_expect = XOPERATOR;
712                           token_getmad($2,$$,'{');
713                           token_getmad($4,$$,';');
714                           token_getmad($5,$$,'}');
715                         }
716         |       term ARROW '(' ')'          /* $subref->() */
717                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
718                                    newCVREF(0, scalar($1)));
719                           token_getmad($2,$$,'a');
720                           token_getmad($3,$$,'(');
721                           token_getmad($4,$$,')');
722                         }
723         |       term ARROW '(' expr ')'     /* $subref->(@args) */
724                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
725                                    append_elem(OP_LIST, $4,
726                                        newCVREF(0, scalar($1))));
727                           token_getmad($2,$$,'a');
728                           token_getmad($3,$$,'(');
729                           token_getmad($5,$$,')');
730                         }
731
732         |       subscripted '(' expr ')'   /* $foo->{bar}->(@args) */
733                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
734                                    append_elem(OP_LIST, $3,
735                                                newCVREF(0, scalar($1))));
736                           token_getmad($2,$$,'(');
737                           token_getmad($4,$$,')');
738                         }
739         |       subscripted '(' ')'        /* $foo->{bar}->() */
740                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
741                                    newCVREF(0, scalar($1)));
742                           token_getmad($2,$$,'(');
743                           token_getmad($3,$$,')');
744                         }
745         |       '(' expr ')' '[' expr ']'            /* list slice */
746                         { $$ = newSLICEOP(0, $5, $2);
747                           token_getmad($1,$$,'(');
748                           token_getmad($3,$$,')');
749                           token_getmad($4,$$,'[');
750                           token_getmad($6,$$,']');
751                         }
752         |       '(' ')' '[' expr ']'                 /* empty list slice! */
753                         { $$ = newSLICEOP(0, $4, Nullop);
754                           token_getmad($1,$$,'(');
755                           token_getmad($2,$$,')');
756                           token_getmad($3,$$,'[');
757                           token_getmad($5,$$,']');
758                         }
759     ;
760
761 /* Binary operators between terms */
762 termbinop:      term ASSIGNOP term             /* $x = $y */
763                         { $$ = newASSIGNOP(OPf_STACKED, $1, ($2)->tk_lval.ival, $3);
764                           token_getmad($2,$$,'o');
765                         }
766         |       term POWOP term                        /* $x ** $y */
767                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
768                           token_getmad($2,$$,'o');
769                         }
770         |       term MULOP term                        /* $x * $y, $x x $y */
771                         {   if (($2)->tk_lval.ival != OP_REPEAT)
772                                 scalar($1);
773                             $$ = newBINOP(($2)->tk_lval.ival, 0, $1, scalar($3));
774                           token_getmad($2,$$,'o');
775                         }
776         |       term ADDOP term                        /* $x + $y */
777                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
778                           token_getmad($2,$$,'o');
779                         }
780         |       term SHIFTOP term                      /* $x >> $y, $x << $y */
781                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
782                           token_getmad($2,$$,'o');
783                         }
784         |       term RELOP term                        /* $x > $y, etc. */
785                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
786                           token_getmad($2,$$,'o');
787                         }
788         |       term EQOP term                         /* $x == $y, $x eq $y */
789                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
790                           token_getmad($2,$$,'o');
791                         }
792         |       term BITANDOP term                     /* $x & $y */
793                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
794                           token_getmad($2,$$,'o');
795                         }
796         |       term BITOROP term                      /* $x | $y */
797                         { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
798                           token_getmad($2,$$,'o');
799                         }
800         |       term DOTDOT term                       /* $x..$y, $x...$y */
801                         { UNOP *op;
802                           $$ = newRANGE(($2)->tk_lval.ival, scalar($1), scalar($3));
803                           op = (UNOP*)$$;
804                           op = (UNOP*)op->op_first;     /* get to flop */
805                           op = (UNOP*)op->op_first;     /* get to flip */
806                           op = (UNOP*)op->op_first;     /* get to range */
807                           token_getmad($2,(OP*)op,'o');
808                         }
809         |       term ANDAND term                       /* $x && $y */
810                         { $$ = newLOGOP(OP_AND, 0, $1, $3);
811                           token_getmad($2,$$,'o');
812                         }
813         |       term OROR term                         /* $x || $y */
814                         { $$ = newLOGOP(OP_OR, 0, $1, $3);
815                           token_getmad($2,$$,'o');
816                         }
817         |       term DORDOR term                       /* $x // $y */
818                         { $$ = newLOGOP(OP_DOR, 0, $1, $3);
819                           token_getmad($2,$$,'o');
820                         }
821         |       term MATCHOP term                      /* $x =~ /$y/ */
822                         { $$ = bind_match(($2)->tk_lval.ival, $1, $3);
823                           if ($$->op_type == OP_NOT)
824                               token_getmad($2,((UNOP*)$$)->op_first,'~');
825                             else
826                               token_getmad($2,$$,'~');
827                         }
828     ;
829
830 /* Unary operators and terms */
831 termunop : '-' term %prec UMINUS                       /* -$x */
832                         { $$ = newUNOP(OP_NEGATE, 0, scalar($2));
833                           token_getmad($1,$$,'o');
834                         }
835         |       '+' term %prec UMINUS                  /* +$x */
836                         { $$ = newUNOP(OP_NULL, 0, $2);
837                           token_getmad($1,$$,'+');
838                         }
839         |       '!' term                               /* !$x */
840                         { $$ = newUNOP(OP_NOT, 0, scalar($2));
841                           token_getmad($1,$$,'o');
842                         }
843         |       '~' term                               /* ~$x */
844                         { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));
845                           token_getmad($1,$$,'o');
846                         }
847         |       term POSTINC                           /* $x++ */
848                         { $$ = newUNOP(OP_POSTINC, 0,
849                                         mod(scalar($1), OP_POSTINC));
850                           token_getmad($2,$$,'o');
851                         }
852         |       term POSTDEC                           /* $x-- */
853                         { $$ = newUNOP(OP_POSTDEC, 0,
854                                         mod(scalar($1), OP_POSTDEC));
855                           token_getmad($2,$$,'o');
856                         }
857         |       PREINC term                            /* ++$x */
858                         { $$ = newUNOP(OP_PREINC, 0,
859                                         mod(scalar($2), OP_PREINC));
860                           token_getmad($1,$$,'o');
861                         }
862         |       PREDEC term                            /* --$x */
863                         { $$ = newUNOP(OP_PREDEC, 0,
864                                         mod(scalar($2), OP_PREDEC));
865                           token_getmad($1,$$,'o');
866                         }
867
868     ;
869
870 /* Constructors for anonymous data */
871 anonymous:      '[' expr ']'
872                         { $$ = newANONLIST($2);
873                           token_getmad($1,$$,'[');
874                           token_getmad($3,$$,']');
875                         }
876         |       '[' ']'
877                         { $$ = newANONLIST(Nullop);
878                           token_getmad($1,$$,'[');
879                           token_getmad($2,$$,']');
880                         }
881         |       HASHBRACK expr ';' '}'  %prec '(' /* { foo => "Bar" } */
882                         { $$ = newANONHASH($2);
883                           token_getmad($1,$$,'{');
884                           token_getmad($3,$$,';');
885                           token_getmad($4,$$,'}');
886                         }
887         |       HASHBRACK ';' '}'       %prec '(' /* { } (';' by tokener) */
888                         { $$ = newANONHASH(Nullop);
889                           token_getmad($1,$$,'{');
890                           token_getmad($2,$$,';');
891                           token_getmad($3,$$,'}');
892                         }
893         |       ANONSUB startanonsub proto subattrlist block    %prec '('
894                         { SvREFCNT_inc(PL_compcv);
895                           $$ = newANONATTRSUB($2, $3, $4, $5);
896                           token_getmad($1,$$,'o');
897                           op_getmad($3,$$,'s');
898                           op_getmad($4,$$,'a');
899                         }
900
901     ;
902
903 /* Things called with "do" */
904 termdo  :       DO term %prec UNIOP                     /* do $filename */
905                         { $$ = dofile($2, $1);
906                           token_getmad($1,$$,'o');
907                         }
908         |       DO block        %prec '('               /* do { code */
909                         { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2));
910                           token_getmad($1,$$,'D');
911                         }
912         |       DO WORD '(' ')'                         /* do somesub() */
913                         { $$ = newUNOP(OP_ENTERSUB,
914                             OPf_SPECIAL|OPf_STACKED,
915                             prepend_elem(OP_LIST,
916                                 scalar(newCVREF(
917                                     (OPpENTERSUB_AMPER<<8),
918                                     scalar($2)
919                                 )),Nullop)); dep();
920                           token_getmad($1,$$,'o');
921                           token_getmad($3,$$,'(');
922                           token_getmad($4,$$,')');
923                         }
924         |       DO WORD '(' expr ')'                    /* do somesub(@args) */
925                         { $$ = newUNOP(OP_ENTERSUB,
926                             OPf_SPECIAL|OPf_STACKED,
927                             append_elem(OP_LIST,
928                                 $4,
929                                 scalar(newCVREF(
930                                     (OPpENTERSUB_AMPER<<8),
931                                     scalar($2)
932                                 )))); dep();
933                           token_getmad($1,$$,'o');
934                           token_getmad($3,$$,'(');
935                           token_getmad($5,$$,')');
936                         }
937         |       DO scalar '(' ')'                      /* do $subref () */
938                         { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
939                             prepend_elem(OP_LIST,
940                                 scalar(newCVREF(0,scalar($2))), Nullop)); dep();
941                           token_getmad($1,$$,'o');
942                           token_getmad($3,$$,'(');
943                           token_getmad($4,$$,')');
944                         }
945         |       DO scalar '(' expr ')'                 /* do $subref (@args) */
946                         { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
947                             prepend_elem(OP_LIST,
948                                 $4,
949                                 scalar(newCVREF(0,scalar($2))))); dep();
950                           token_getmad($1,$$,'o');
951                           token_getmad($3,$$,'(');
952                           token_getmad($5,$$,')');
953                         }
954
955         ;
956
957 term    :       termbinop
958         |       termunop
959         |       anonymous
960         |       termdo
961         |       term '?' term ':' term
962                         { $$ = newCONDOP(0, $1, $3, $5);
963                           token_getmad($2,$$,'?');
964                           token_getmad($4,$$,':');
965                         }
966         |       REFGEN term                          /* \$x, \@y, \%z */
967                         { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN));
968                           token_getmad($1,$$,'o');
969                         }
970         |       myattrterm      %prec UNIOP
971                         { $$ = $1; }
972         |       LOCAL term      %prec UNIOP
973                         { $$ = localize($2,($1)->tk_lval.ival);
974                           token_getmad($1,$$,'d');
975                         }
976         |       '(' expr ')'
977                         { $$ = sawparens(newUNOP(OP_NULL,0,$2));
978                           token_getmad($1,$$,'(');
979                           token_getmad($3,$$,')');
980                         }
981         |       '(' ')'
982                         { $$ = sawparens(newNULLLIST());
983                           token_getmad($1,$$,'(');
984                           token_getmad($2,$$,')');
985                         }
986         |       scalar  %prec '('
987                         { $$ = $1; }
988         |       star    %prec '('
989                         { $$ = $1; }
990         |       hsh     %prec '('
991                         { $$ = $1; }
992         |       ary     %prec '('
993                         { $$ = $1; }
994         |       arylen  %prec '('                    /* $#x, $#{ something } */
995                         { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
996         |       subscripted
997                         { $$ = $1; }
998         |       ary '[' expr ']'                     /* array slice */
999                         { $$ = prepend_elem(OP_ASLICE,
1000                                 newOP(OP_PUSHMARK, 0),
1001                                     newLISTOP(OP_ASLICE, 0,
1002                                         list($3),
1003                                         ref($1, OP_ASLICE)));
1004                           token_getmad($2,$$,'[');
1005                           token_getmad($4,$$,']');
1006                         }
1007         |       ary '{' expr ';' '}'                 /* @hash{@keys} */
1008                         { $$ = prepend_elem(OP_HSLICE,
1009                                 newOP(OP_PUSHMARK, 0),
1010                                     newLISTOP(OP_HSLICE, 0,
1011                                         list($3),
1012                                         ref(oopsHV($1), OP_HSLICE)));
1013                             PL_expect = XOPERATOR;
1014                           token_getmad($2,$$,'{');
1015                           token_getmad($4,$$,';');
1016                           token_getmad($5,$$,'}');
1017                         }
1018         |       THING   %prec '('
1019                         { $$ = $1; }
1020         |       amper                                /* &foo; */
1021                         { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
1022         |       amper '(' ')'                        /* &foo() */
1023                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1));
1024                           token_getmad($2,$$,'(');
1025                           token_getmad($3,$$,')');
1026                         }
1027         |       amper '(' expr ')'                   /* &foo(@args) */
1028                         { OP* op;
1029                           $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1030                                 append_elem(OP_LIST, $3, scalar($1)));
1031                           op = $$;
1032                           if (op->op_type == OP_CONST) { /* defeat const fold */
1033                             op = (OP*)op->op_madprop->mad_val;
1034                           }
1035                           token_getmad($2,op,'(');
1036                           token_getmad($4,op,')');
1037                         }
1038         |       NOAMP WORD listexpr                  /* foo(@args) */
1039                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1040                             append_elem(OP_LIST, $3, scalar($2)));
1041                           token_getmad($1,$$,'o');
1042                         }
1043         |       LOOPEX  /* loop exiting command (goto, last, dump, etc) */
1044                         { $$ = newOP(($1)->tk_lval.ival, OPf_SPECIAL);
1045                             PL_hints |= HINT_BLOCK_SCOPE;
1046                           token_getmad($1,$$,'o');
1047                         }
1048         |       LOOPEX term
1049                         { $$ = newLOOPEX(($1)->tk_lval.ival,$2);
1050                           token_getmad($1,$$,'o');
1051                         }
1052         |       NOTOP argexpr                        /* not $foo */
1053                         { $$ = newUNOP(OP_NOT, 0, scalar($2));
1054                           token_getmad($1,$$,'o');
1055                         }
1056         |       UNIOP                                /* Unary op, $_ implied */
1057                         { $$ = newOP(($1)->tk_lval.ival, 0);
1058                           token_getmad($1,$$,'o');
1059                         }
1060         |       UNIOP block                          /* eval { foo }, I *think* */
1061                         { $$ = newUNOP(($1)->tk_lval.ival, 0, $2);
1062                           token_getmad($1,$$,'o');
1063                         }
1064         |       UNIOP term                           /* Unary op */
1065                         { $$ = newUNOP(($1)->tk_lval.ival, 0, $2);
1066                           token_getmad($1,$$,'o');
1067                         }
1068         |       REQUIRE                              /* require, $_ implied *//* FIMXE for MAD needed? */
1069                         { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); }
1070         |       REQUIRE term                         /* require Foo *//* FIMXE for MAD needed? */
1071                         { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); }
1072         |       UNIOPSUB term                        /* Sub treated as unop */
1073                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1074                             append_elem(OP_LIST, $2, scalar($1))); }
1075         |       FUNC0                                /* Nullary operator */
1076                         { $$ = newOP(($1)->tk_lval.ival, 0);
1077                           token_getmad($1,$$,'o');
1078                         }
1079         |       FUNC0 '(' ')'
1080                         { $$ = newOP(($1)->tk_lval.ival, 0);
1081                           token_getmad($1,$$,'o');
1082                           token_getmad($2,$$,'(');
1083                           token_getmad($3,$$,')');
1084                         }
1085         |       FUNC0SUB                             /* Sub treated as nullop */
1086                         { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1087                                 scalar($1)); }
1088         |       FUNC1 '(' ')'                        /* not () */
1089                         { $$ = newOP(($1)->tk_lval.ival, OPf_SPECIAL);
1090                           token_getmad($1,$$,'o');
1091                           token_getmad($2,$$,'(');
1092                           token_getmad($3,$$,')');
1093                         }
1094         |       FUNC1 '(' expr ')'                   /* not($foo) */
1095                         { $$ = newUNOP(($1)->tk_lval.ival, 0, $3);
1096                           token_getmad($1,$$,'o');
1097                           token_getmad($2,$$,'(');
1098                           token_getmad($4,$$,')');
1099                         }
1100         |       PMFUNC '(' argexpr ')'          /* m//, s///, tr/// */
1101                         { $$ = pmruntime($1, $3, 1);
1102                           token_getmad($2,$$,'(');
1103                           token_getmad($4,$$,')');
1104                         }
1105         |       WORD
1106         |       listop
1107         ;
1108
1109 /* "my" declarations, with optional attributes */
1110 myattrterm:     MY myterm myattrlist
1111                         { $$ = my_attrs($2,$3);
1112                           token_getmad($1,$$,'d');
1113                           append_madprops($3->op_madprop, $$, 'a');
1114                           $3->op_madprop = 0;
1115                         }
1116         |       MY myterm
1117                         { $$ = localize($2,($1)->tk_lval.ival);
1118                           token_getmad($1,$$,'d');
1119                         }
1120         ;
1121
1122 /* Things that can be "my"'d */
1123 myterm  :       '(' expr ')'
1124                         { $$ = sawparens($2);
1125                           token_getmad($1,$$,'(');
1126                           token_getmad($3,$$,')');
1127                         }
1128         |       '(' ')'
1129                         { $$ = sawparens(newNULLLIST());
1130                           token_getmad($1,$$,'(');
1131                           token_getmad($2,$$,')');
1132                         }
1133         |       scalar  %prec '('
1134                         { $$ = $1; }
1135         |       hsh     %prec '('
1136                         { $$ = $1; }
1137         |       ary     %prec '('
1138                         { $$ = $1; }
1139         ;
1140
1141 /* Basic list expressions */
1142 listexpr:       /* NULL */ %prec PREC_LOW
1143                         { $$ = Nullop; }
1144         |       argexpr    %prec PREC_LOW
1145                         { $$ = $1; }
1146         ;
1147
1148 listexprcom:    /* NULL */
1149                         { $$ = Nullop; }
1150         |       expr
1151                         { $$ = $1; }
1152         |       expr ','
1153                         { OP* op = newNULLLIST();
1154                           token_getmad($2,op,',');
1155                           $$ = append_elem(OP_LIST, $1, op);
1156                         }
1157         ;
1158
1159 /* A little bit of trickery to make "for my $foo (@bar)" actually be
1160    lexical */
1161 my_scalar:      scalar
1162                         { PL_in_my = 0; $$ = my($1); }
1163         ;
1164
1165 amper   :       '&' indirob
1166                         { $$ = newCVREF(($1)->tk_lval.ival,$2);
1167                           token_getmad($1,$$,'&');
1168                         }
1169         ;
1170
1171 scalar  :       '$' indirob
1172                         { $$ = newSVREF($2);
1173                           token_getmad($1,$$,'$');
1174                         }
1175         ;
1176
1177 ary     :       '@' indirob
1178                         { $$ = newAVREF($2);
1179                           token_getmad($1,$$,'@');
1180                         }
1181         ;
1182
1183 hsh     :       '%' indirob
1184                         { $$ = newHVREF($2);
1185                           token_getmad($1,$$,'%');
1186                         }
1187         ;
1188
1189 arylen  :       DOLSHARP indirob
1190                         { $$ = newAVREF($2);
1191                           token_getmad($1,$$,'l');
1192                         }
1193         ;
1194
1195 star    :       '*' indirob
1196                         { $$ = newGVREF(0,$2);
1197                           token_getmad($1,$$,'*');
1198                         }
1199         ;
1200
1201 /* Indirect objects */
1202 indirob :       WORD
1203                         { $$ = scalar($1); }
1204         |       scalar %prec PREC_LOW
1205                         { $$ = scalar($1); }
1206         |       block
1207                         { $$ = scope($1); }
1208
1209         |       PRIVATEREF
1210                         { $$ = $1; }
1211         ;