3 * Copyright (c) 1991-2002, 2003, 2004 Larry Wall
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.
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.'
15 /* Make the parser re-entrant. */
17 /* FIXME for MAD - is the new mintro on while and until important? */
30 %token <tkval> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*'
32 %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF
33 %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB
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
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
52 %type <opval> decl format subrout mysubrout package use peg
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
64 %nonassoc <tkval> PREC_LOW
67 %left <tkval> OROP DOROP
70 %nonassoc LSTOP LSTOPSUB
72 %right <tkval> ASSIGNOP
73 %right <tkval> '?' ':'
75 %left <tkval> OROR DORDOR
78 %left <tkval> BITANDOP
81 %nonassoc UNIOP UNIOPSUB
87 %right <tkval> '!' '~' UMINUS REFGEN
89 %nonassoc <tkval> PREINC PREDEC POSTINC POSTDEC
99 /* The whole program */
101 /*CONTINUED*/ lineseq
102 { $$ = $1; newPROG(block_end($1,$2)); }
105 /* An ordinary block */
106 block : '{' remember lineseq '}'
107 { if (PL_copline > (line_t)($1)->tk_lval.ival)
108 PL_copline = (line_t)($1)->tk_lval.ival;
109 $$ = block_end($2, $3);
110 token_getmad($1,$$,'{');
111 token_getmad($4,$$,'}');
115 remember: /* NULL */ /* start a full lexical scope */
116 { $$ = block_start(TRUE); }
119 mydefsv: /* NULL */ /* lexicalize $_ */
120 { $$ = (I32) allocmy("$_"); }
125 PL_expect = XSTATE; $$ = block_start(TRUE);
130 mblock : '{' mremember lineseq '}'
131 { if (PL_copline > (line_t)($1)->tk_lval.ival)
132 PL_copline = (line_t)($1)->tk_lval.ival;
133 $$ = block_end($2, $3);
134 token_getmad($1,$$,'{');
135 token_getmad($4,$$,'}');
139 mremember: /* NULL */ /* start a partial lexical scope */
140 { $$ = block_start(FALSE); }
143 savescope: /* NULL */ /* remember stack pos in case of error */
144 { $$ = PL_savestack_ix; }
146 /* A collection of "lines" in the program */
151 { $$ = append_list(OP_LINESEQ,
152 (LISTOP*)$1, (LISTOP*)$2); }
153 | lineseq savescope line
155 $$ = append_list(OP_LINESEQ,
156 (LISTOP*)$1, (LISTOP*)$3);
157 PL_pad_reset_pending = TRUE;
158 if ($1 && $3) PL_hints |= HINT_BLOCK_SCOPE; }
161 /* A "line" in the program */
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 */
169 { $$ = newSTATEOP(0, ($1)->tk_lval.pval, $2); }
172 if (($1)->tk_lval.pval) {
173 $$ = newSTATEOP(0, ($1)->tk_lval.pval, newOP(OP_NULL, 0));
174 token_getmad($1,$$,'L');
175 token_getmad($2,((LISTOP*)$$)->op_first,';');
178 $$ = newOP(OP_NULL, 0);
181 token_getmad($2,$$,';');
187 $$ = newSTATEOP(0, ($1)->tk_lval.pval, $2);
189 /* sideff might already have a nexstate */
190 op = ((LISTOP*)$$)->op_first;
192 while (op->op_sibling &&
193 op->op_sibling->op_type == OP_NEXTSTATE)
195 token_getmad($1,op,'L');
196 token_getmad($3,op,';');
201 /* An expression which may have a side-effect */
207 { $$ = newLOGOP(OP_AND, 0, $3, $1);
208 token_getmad($2,$$,'i');
211 { $$ = newLOGOP(OP_OR, 0, $3, $1);
212 token_getmad($2,$$,'i');
215 { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1);
216 token_getmad($2,$$,'w');
219 { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);
220 token_getmad($2,$$,'w');
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');
229 /* else and elsif blocks */
233 { ($2)->op_flags |= OPf_PARENS; $$ = scope($2);
234 token_getmad($1,$$,'o');
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,$$,'(');
242 token_getmad($4,$$,')');
246 /* Real conditional expressions */
247 cond : IF '(' remember mexpr ')' mblock else
248 { PL_copline = (line_t)($1)->tk_lval.ival;
250 newCONDOP(0, $4, scope($6), $7));
251 token_getmad($1,$$,'I');
252 token_getmad($2,$$,'(');
253 token_getmad($5,$$,')');
255 | UNLESS '(' remember miexpr ')' mblock else
256 { PL_copline = (line_t)($1)->tk_lval.ival;
258 newCONDOP(0, $4, scope($6), $7));
259 token_getmad($1,$$,'I');
260 token_getmad($2,$$,'(');
261 token_getmad($5,$$,')');
265 /* Cases for a switch statement */
266 case : WHEN '(' remember mexpr ')' mblock
268 newWHENOP($4, scope($6))); }
270 { $$ = newWHENOP(0, scope($2)); }
273 /* Continue blocks */
278 token_getmad($1,$$,'o');
282 /* Loops: while, until, for, and a bare block */
283 loop : label WHILE '(' remember texpr ')' mintro mblock cont
285 PL_copline = (line_t)$2;
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,')');
296 | label UNTIL '(' remember iexpr ')' mintro mblock cont
298 PL_copline = (line_t)$2;
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,')');
308 | label FOR MY remember my_scalar '(' mexpr ')' mblock cont
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,')');
318 | label FOR scalar '(' remember mexpr ')' mblock cont
321 innerop = newFOROP(0, ($1)->tk_lval.pval, (line_t)($2)->tk_lval.ival, mod($3, OP_ENTERLOOP),
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,')');
328 | label FOR '(' remember mexpr ')' mblock cont
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,')');
337 | label FOR '(' remember mnexpr ';' texpr ';' mintro mnexpr ')'
339 /* basically fake up an initialize-while lineseq */
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),
347 $5 = newOP(OP_NULL, 0);
348 forop = newUNOP(OP_NULL, 0, append_elem(OP_LINESEQ,
351 ?savepv(($1)->tk_lval.pval):Nullch),
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*)$$)->op_first,'L'); }
370 switch : label GIVEN '(' remember mydefsv mexpr ')' mblock
371 { PL_copline = (line_t) $2;
373 newSTATEOP(0, ($1)->tk_lval.pval,
374 newGIVENOP($6, scope($8),
375 (PADOFFSET) $5) )); }
378 /* determine whether there are any new my declarations */
380 { $$ = (PL_min_intro_pending &&
381 PL_max_intro_pending >= PL_min_intro_pending);
384 /* Normal expression */
390 /* Boolean expression */
391 texpr : /* NULL means true */
393 (void)scan_num("1", &tmplval);
394 $$ = tmplval.opval; }
398 /* Inverted boolean expression */
400 { $$ = invert(scalar($1)); }
403 /* Expression with its own lexical scope */
405 { $$ = $1; intro_my(); }
409 { $$ = $1; intro_my(); }
413 { $$ = $1; intro_my(); }
416 /* Optional "MAIN:"-style loop labels */
419 tmplval.pval = Nullch;
420 $$ = newTOKEN(OP_NULL, tmplval, 0); }
424 /* Some kind of declaration - just hang on peg in the parse tree */
440 { $$ = newOP(OP_NULL,0);
441 token_getmad($1,$$,'p');
445 format : FORMAT startformsub formname block
446 { $$ = newFORM($2, $3, $4);
447 prepend_madprops($1->tk_mad, $$, 'F');
453 formname: WORD { $$ = $1; }
454 | /* NULL */ { $$ = Nullop; }
457 /* Unimplemented "my sub foo { }" */
458 mysubrout: MYSUB startsub subname proto subattrlist subbody
459 { $$ = newMYSUB($2, $3, $4, $5, $6);
460 token_getmad($1,$$,'d');
464 /* Subroutine definition */
465 subrout : SUB startsub subname proto subattrlist subbody
466 { OP* o = newSVOP(OP_ANONCODE, 0,
467 (SV*)newATTRSUB($2, $3, $4, $5, $6));
468 $$ = newOP(OP_NULL,0);
470 op_getmad($3,$$,'n');
471 op_getmad($4,$$,'s');
472 op_getmad($5,$$,'a');
473 token_getmad($1,$$,'d');
474 append_madprops($6->op_madprop, $$, 0);
479 startsub: /* NULL */ /* start a regular subroutine scope */
480 { $$ = start_subparse(FALSE, 0); }
483 startanonsub: /* NULL */ /* start an anonymous subroutine scope */
484 { $$ = start_subparse(FALSE, CVf_ANON); }
487 startformsub: /* NULL */ /* start a format subroutine scope */
488 { $$ = start_subparse(TRUE, 0); }
491 /* Name of a subroutine - must be a bareword, could be special */
492 subname : WORD { const char *const name = SvPV_nolen_const(((SVOP*)$1)->op_sv);
493 if (strEQ(name, "BEGIN") || strEQ(name, "END")
494 || strEQ(name, "INIT") || strEQ(name, "CHECK"))
495 CvSPECIAL_on(PL_compcv);
499 /* Subroutine prototype */
505 /* Optional list of subroutine attributes */
506 subattrlist: /* NULL */
510 token_getmad($1,$$,':');
513 { $$ = newOP(OP_NULL, 0);
514 token_getmad($1,$$,':');
518 /* List of attributes for a "my" variable declaration */
519 myattrlist: COLONATTR THING
521 token_getmad($1,$$,':');
524 { $$ = newOP(OP_NULL, 0);
525 token_getmad($1,$$,':');
529 /* Subroutine body - either null or a block */
530 subbody : block { $$ = $1; }
531 | ';' { $$ = newOP(OP_NULL,0); PL_expect = XSTATE;
532 token_getmad($1,$$,';');
536 package : PACKAGE WORD ';'
538 token_getmad($1,$$,'o');
539 token_getmad($3,$$,';');
544 { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
545 WORD WORD listexpr ';'
546 { $$ = utilize(($1)->tk_lval.ival, $2, $4, $5, $6);
547 token_getmad($1,$$,'o');
548 token_getmad($7,$$,';');
549 if (PL_rsfp_filters && AvFILLp(PL_rsfp_filters) >= 0)
550 append_madprops(newMADPROP('!', MAD_PV, "", 0), $$, 0);
554 /* Ordinary expressions; logical combinations */
555 expr : expr ANDOP expr
556 { $$ = newLOGOP(OP_AND, 0, $1, $3);
557 token_getmad($2,$$,'o');
560 { $$ = newLOGOP(($2)->tk_lval.ival, 0, $1, $3);
561 token_getmad($2,$$,'o');
564 { $$ = newLOGOP(OP_DOR, 0, $1, $3);
565 token_getmad($2,$$,'o');
567 | argexpr %prec PREC_LOW
570 /* Expressions are a list of terms joined by commas */
571 argexpr : argexpr ','
572 { OP* op = newNULLLIST();
573 token_getmad($2,op,',');
574 $$ = append_elem(OP_LIST, $1, op);
578 $3 = newUNOP(OP_NULL, 0, $3);
579 token_getmad($2,$3,',');
580 $$ = append_elem(OP_LIST, $1, $3);
582 | term %prec PREC_LOW
586 listop : LSTOP indirob argexpr /* print $fh @args */
587 { $$ = convert(($1)->tk_lval.ival, OPf_STACKED,
588 prepend_elem(OP_LIST, newGVREF(($1)->tk_lval.ival,$2), $3) );
589 token_getmad($1,$$,'o');
591 | FUNC '(' indirob expr ')' /* print ($fh @args */
592 { $$ = convert(($1)->tk_lval.ival, OPf_STACKED,
593 prepend_elem(OP_LIST, newGVREF(($1)->tk_lval.ival,$3), $4) );
594 token_getmad($1,$$,'o');
595 token_getmad($2,$$,'(');
596 token_getmad($5,$$,')');
598 | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */
599 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
601 prepend_elem(OP_LIST, scalar($1), $5),
602 newUNOP(OP_METHOD, 0, $3)));
603 token_getmad($2,$$,'A');
604 token_getmad($4,$$,'(');
605 token_getmad($6,$$,')');
607 | term ARROW method /* $foo->bar */
608 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
609 append_elem(OP_LIST, scalar($1),
610 newUNOP(OP_METHOD, 0, $3)));
611 token_getmad($2,$$,'A');
613 | METHOD indirob listexpr /* new Class @args */
614 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
616 prepend_elem(OP_LIST, $2, $3),
617 newUNOP(OP_METHOD, 0, $1)));
619 | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */
620 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
622 prepend_elem(OP_LIST, $2, $4),
623 newUNOP(OP_METHOD, 0, $1)));
624 token_getmad($3,$$,'(');
625 token_getmad($5,$$,')');
627 | LSTOP listexpr /* print @args */
628 { $$ = convert(($1)->tk_lval.ival, 0, $2);
629 token_getmad($1,$$,'o');
631 | FUNC '(' listexprcom ')' /* print (@args) */
632 { $$ = convert(($1)->tk_lval.ival, 0, $3);
633 token_getmad($1,$$,'o');
634 token_getmad($2,$$,'(');
635 token_getmad($4,$$,')');
637 | LSTOPSUB startanonsub block /* map { foo } ... */
638 { $3 = newANONATTRSUB($2, 0, Nullop, $3); }
639 listexpr %prec LSTOP /* ... @bar */
640 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
642 prepend_elem(OP_LIST, $3, $5), $1));
646 /* Names of methods. May use $object->$methodname */
651 /* Some kind of subscripted expression */
652 subscripted: star '{' expr ';' '}' /* *main::{something} */
653 /* In this and all the hash accessors, ';' is
654 * provided by the tokeniser */
655 { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3));
656 PL_expect = XOPERATOR;
657 token_getmad($2,$$,'{');
658 token_getmad($4,$$,';');
659 token_getmad($5,$$,'}');
661 | scalar '[' expr ']' /* $array[$element] */
662 { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3));
663 token_getmad($2,$$,'[');
664 token_getmad($4,$$,']');
666 | term ARROW '[' expr ']' /* somearef->[$element] */
667 { $$ = newBINOP(OP_AELEM, 0,
668 ref(newAVREF($1),OP_RV2AV),
670 token_getmad($2,$$,'a');
671 token_getmad($3,$$,'[');
672 token_getmad($5,$$,']');
674 | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */
675 { $$ = newBINOP(OP_AELEM, 0,
676 ref(newAVREF($1),OP_RV2AV),
678 token_getmad($2,$$,'[');
679 token_getmad($4,$$,']');
681 | scalar '{' expr ';' '}' /* $foo->{bar();} */
682 { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
683 PL_expect = XOPERATOR;
684 token_getmad($2,$$,'{');
685 token_getmad($4,$$,';');
686 token_getmad($5,$$,'}');
688 | term ARROW '{' expr ';' '}' /* somehref->{bar();} */
689 { $$ = newBINOP(OP_HELEM, 0,
690 ref(newHVREF($1),OP_RV2HV),
692 PL_expect = XOPERATOR;
693 token_getmad($2,$$,'a');
694 token_getmad($3,$$,'{');
695 token_getmad($5,$$,';');
696 token_getmad($6,$$,'}');
698 | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */
699 { $$ = newBINOP(OP_HELEM, 0,
700 ref(newHVREF($1),OP_RV2HV),
702 PL_expect = XOPERATOR;
703 token_getmad($2,$$,'{');
704 token_getmad($4,$$,';');
705 token_getmad($5,$$,'}');
707 | term ARROW '(' ')' /* $subref->() */
708 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
709 newCVREF(0, scalar($1)));
710 token_getmad($2,$$,'a');
711 token_getmad($3,$$,'(');
712 token_getmad($4,$$,')');
714 | term ARROW '(' expr ')' /* $subref->(@args) */
715 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
716 append_elem(OP_LIST, $4,
717 newCVREF(0, scalar($1))));
718 token_getmad($2,$$,'a');
719 token_getmad($3,$$,'(');
720 token_getmad($5,$$,')');
723 | subscripted '(' expr ')' /* $foo->{bar}->(@args) */
724 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
725 append_elem(OP_LIST, $3,
726 newCVREF(0, scalar($1))));
727 token_getmad($2,$$,'(');
728 token_getmad($4,$$,')');
730 | subscripted '(' ')' /* $foo->{bar}->() */
731 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
732 newCVREF(0, scalar($1)));
733 token_getmad($2,$$,'(');
734 token_getmad($3,$$,')');
736 | '(' expr ')' '[' expr ']' /* list slice */
737 { $$ = newSLICEOP(0, $5, $2);
738 token_getmad($1,$$,'(');
739 token_getmad($3,$$,')');
740 token_getmad($4,$$,'[');
741 token_getmad($6,$$,']');
743 | '(' ')' '[' expr ']' /* empty list slice! */
744 { $$ = newSLICEOP(0, $4, Nullop);
745 token_getmad($1,$$,'(');
746 token_getmad($2,$$,')');
747 token_getmad($3,$$,'[');
748 token_getmad($5,$$,']');
752 /* Binary operators between terms */
753 termbinop: term ASSIGNOP term /* $x = $y */
754 { $$ = newASSIGNOP(OPf_STACKED, $1, ($2)->tk_lval.ival, $3);
755 token_getmad($2,$$,'o');
757 | term POWOP term /* $x ** $y */
758 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
759 token_getmad($2,$$,'o');
761 | term MULOP term /* $x * $y, $x x $y */
762 { if (($2)->tk_lval.ival != OP_REPEAT)
764 $$ = newBINOP(($2)->tk_lval.ival, 0, $1, scalar($3));
765 token_getmad($2,$$,'o');
767 | term ADDOP term /* $x + $y */
768 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
769 token_getmad($2,$$,'o');
771 | term SHIFTOP term /* $x >> $y, $x << $y */
772 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
773 token_getmad($2,$$,'o');
775 | term RELOP term /* $x > $y, etc. */
776 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
777 token_getmad($2,$$,'o');
779 | term EQOP term /* $x == $y, $x eq $y */
780 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
781 token_getmad($2,$$,'o');
783 | term BITANDOP term /* $x & $y */
784 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
785 token_getmad($2,$$,'o');
787 | term BITOROP term /* $x | $y */
788 { $$ = newBINOP(($2)->tk_lval.ival, 0, scalar($1), scalar($3));
789 token_getmad($2,$$,'o');
791 | term DOTDOT term /* $x..$y, $x...$y */
793 $$ = newRANGE(($2)->tk_lval.ival, scalar($1), scalar($3));
795 op = (UNOP*)op->op_first; /* get to flop */
796 op = (UNOP*)op->op_first; /* get to flip */
797 op = (UNOP*)op->op_first; /* get to range */
798 token_getmad($2,(OP*)op,'o');
800 | term ANDAND term /* $x && $y */
801 { $$ = newLOGOP(OP_AND, 0, $1, $3);
802 token_getmad($2,$$,'o');
804 | term OROR term /* $x || $y */
805 { $$ = newLOGOP(OP_OR, 0, $1, $3);
806 token_getmad($2,$$,'o');
808 | term DORDOR term /* $x // $y */
809 { $$ = newLOGOP(OP_DOR, 0, $1, $3);
810 token_getmad($2,$$,'o');
812 | term MATCHOP term /* $x =~ /$y/ */
813 { $$ = bind_match(($2)->tk_lval.ival, $1, $3);
814 if ($$->op_type == OP_NOT)
815 token_getmad($2,((UNOP*)$$)->op_first,'~');
817 token_getmad($2,$$,'~');
821 /* Unary operators and terms */
822 termunop : '-' term %prec UMINUS /* -$x */
823 { $$ = newUNOP(OP_NEGATE, 0, scalar($2));
824 token_getmad($1,$$,'o');
826 | '+' term %prec UMINUS /* +$x */
827 { $$ = newUNOP(OP_NULL, 0, $2);
828 token_getmad($1,$$,'+');
831 { $$ = newUNOP(OP_NOT, 0, scalar($2));
832 token_getmad($1,$$,'o');
835 { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));
836 token_getmad($1,$$,'o');
838 | term POSTINC /* $x++ */
839 { $$ = newUNOP(OP_POSTINC, 0,
840 mod(scalar($1), OP_POSTINC));
841 token_getmad($2,$$,'o');
843 | term POSTDEC /* $x-- */
844 { $$ = newUNOP(OP_POSTDEC, 0,
845 mod(scalar($1), OP_POSTDEC));
846 token_getmad($2,$$,'o');
848 | PREINC term /* ++$x */
849 { $$ = newUNOP(OP_PREINC, 0,
850 mod(scalar($2), OP_PREINC));
851 token_getmad($1,$$,'o');
853 | PREDEC term /* --$x */
854 { $$ = newUNOP(OP_PREDEC, 0,
855 mod(scalar($2), OP_PREDEC));
856 token_getmad($1,$$,'o');
861 /* Constructors for anonymous data */
862 anonymous: '[' expr ']'
863 { $$ = newANONLIST($2);
864 token_getmad($1,$$,'[');
865 token_getmad($3,$$,']');
868 { $$ = newANONLIST(Nullop);
869 token_getmad($1,$$,'[');
870 token_getmad($2,$$,']');
872 | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
873 { $$ = newANONHASH($2);
874 token_getmad($1,$$,'{');
875 token_getmad($3,$$,';');
876 token_getmad($4,$$,'}');
878 | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
879 { $$ = newANONHASH(Nullop);
880 token_getmad($1,$$,'{');
881 token_getmad($2,$$,';');
882 token_getmad($3,$$,'}');
884 | ANONSUB startanonsub proto subattrlist block %prec '('
885 { $$ = newANONATTRSUB($2, $3, $4, $5);
886 token_getmad($1,$$,'o');
887 op_getmad($3,$$,'s');
888 op_getmad($4,$$,'a');
893 /* Things called with "do" */
894 termdo : DO term %prec UNIOP /* do $filename */
895 { $$ = dofile($2, $1);
896 token_getmad($1,$$,'o');
898 | DO block %prec '(' /* do { code */
899 { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2));
900 token_getmad($1,$$,'D');
902 | DO WORD '(' ')' /* do somesub() */
903 { $$ = newUNOP(OP_ENTERSUB,
904 OPf_SPECIAL|OPf_STACKED,
905 prepend_elem(OP_LIST,
907 (OPpENTERSUB_AMPER<<8),
910 token_getmad($1,$$,'o');
911 token_getmad($3,$$,'(');
912 token_getmad($4,$$,')');
914 | DO WORD '(' expr ')' /* do somesub(@args) */
915 { $$ = newUNOP(OP_ENTERSUB,
916 OPf_SPECIAL|OPf_STACKED,
920 (OPpENTERSUB_AMPER<<8),
923 token_getmad($1,$$,'o');
924 token_getmad($3,$$,'(');
925 token_getmad($5,$$,')');
927 | DO scalar '(' ')' /* do $subref () */
928 { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
929 prepend_elem(OP_LIST,
930 scalar(newCVREF(0,scalar($2))), Nullop)); dep();
931 token_getmad($1,$$,'o');
932 token_getmad($3,$$,'(');
933 token_getmad($4,$$,')');
935 | DO scalar '(' expr ')' /* do $subref (@args) */
936 { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
937 prepend_elem(OP_LIST,
939 scalar(newCVREF(0,scalar($2))))); dep();
940 token_getmad($1,$$,'o');
941 token_getmad($3,$$,'(');
942 token_getmad($5,$$,')');
951 | term '?' term ':' term
952 { $$ = newCONDOP(0, $1, $3, $5);
953 token_getmad($2,$$,'?');
954 token_getmad($4,$$,':');
956 | REFGEN term /* \$x, \@y, \%z */
957 { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN));
958 token_getmad($1,$$,'o');
960 | myattrterm %prec UNIOP
962 | LOCAL term %prec UNIOP
963 { $$ = localize($2,($1)->tk_lval.ival);
964 token_getmad($1,$$,'d');
967 { $$ = sawparens(newUNOP(OP_NULL,0,$2));
968 token_getmad($1,$$,'(');
969 token_getmad($3,$$,')');
972 { $$ = sawparens(newNULLLIST());
973 token_getmad($1,$$,'(');
974 token_getmad($2,$$,')');
984 | arylen %prec '(' /* $#x, $#{ something } */
985 { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
988 | ary '[' expr ']' /* array slice */
989 { $$ = prepend_elem(OP_ASLICE,
990 newOP(OP_PUSHMARK, 0),
991 newLISTOP(OP_ASLICE, 0,
993 ref($1, OP_ASLICE)));
994 token_getmad($2,$$,'[');
995 token_getmad($4,$$,']');
997 | ary '{' expr ';' '}' /* @hash{@keys} */
998 { $$ = prepend_elem(OP_HSLICE,
999 newOP(OP_PUSHMARK, 0),
1000 newLISTOP(OP_HSLICE, 0,
1002 ref(oopsHV($1), OP_HSLICE)));
1003 PL_expect = XOPERATOR;
1004 token_getmad($2,$$,'{');
1005 token_getmad($4,$$,';');
1006 token_getmad($5,$$,'}');
1011 { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
1012 | amper '(' ')' /* &foo() */
1013 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1));
1014 token_getmad($2,$$,'(');
1015 token_getmad($3,$$,')');
1017 | amper '(' expr ')' /* &foo(@args) */
1019 $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1020 append_elem(OP_LIST, $3, scalar($1)));
1022 if (op->op_type == OP_CONST) { /* defeat const fold */
1023 op = (OP*)op->op_madprop->mad_val;
1025 token_getmad($2,op,'(');
1026 token_getmad($4,op,')');
1028 | NOAMP WORD listexpr /* foo(@args) */
1029 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1030 append_elem(OP_LIST, $3, scalar($2)));
1031 token_getmad($1,$$,'o');
1033 | LOOPEX /* loop exiting command (goto, last, dump, etc) */
1034 { $$ = newOP(($1)->tk_lval.ival, OPf_SPECIAL);
1035 PL_hints |= HINT_BLOCK_SCOPE;
1036 token_getmad($1,$$,'o');
1039 { $$ = newLOOPEX(($1)->tk_lval.ival,$2);
1040 token_getmad($1,$$,'o');
1042 | NOTOP argexpr /* not $foo */
1043 { $$ = newUNOP(OP_NOT, 0, scalar($2));
1044 token_getmad($1,$$,'o');
1046 | UNIOP /* Unary op, $_ implied */
1047 { $$ = newOP(($1)->tk_lval.ival, 0);
1048 token_getmad($1,$$,'o');
1050 | UNIOP block /* eval { foo }, I *think* */
1051 { $$ = newUNOP(($1)->tk_lval.ival, 0, $2);
1052 token_getmad($1,$$,'o');
1054 | UNIOP term /* Unary op */
1055 { $$ = newUNOP(($1)->tk_lval.ival, 0, $2);
1056 token_getmad($1,$$,'o');
1058 | REQUIRE /* require, $_ implied *//* FIMXE for MAD needed? */
1059 { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0); }
1060 | REQUIRE term /* require Foo *//* FIMXE for MAD needed? */
1061 { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2); }
1062 | UNIOPSUB term /* Sub treated as unop */
1063 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1064 append_elem(OP_LIST, $2, scalar($1))); }
1065 | FUNC0 /* Nullary operator */
1066 { $$ = newOP(($1)->tk_lval.ival, 0);
1067 token_getmad($1,$$,'o');
1070 { $$ = newOP(($1)->tk_lval.ival, 0);
1071 token_getmad($1,$$,'o');
1072 token_getmad($2,$$,'(');
1073 token_getmad($3,$$,')');
1075 | FUNC0SUB /* Sub treated as nullop */
1076 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
1078 | FUNC1 '(' ')' /* not () */
1079 { $$ = newOP(($1)->tk_lval.ival, OPf_SPECIAL);
1080 token_getmad($1,$$,'o');
1081 token_getmad($2,$$,'(');
1082 token_getmad($3,$$,')');
1084 | FUNC1 '(' expr ')' /* not($foo) */
1085 { $$ = newUNOP(($1)->tk_lval.ival, 0, $3);
1086 token_getmad($1,$$,'o');
1087 token_getmad($2,$$,'(');
1088 token_getmad($4,$$,')');
1090 | PMFUNC '(' argexpr ')' /* m//, s///, tr/// */
1091 { $$ = pmruntime($1, $3, 1);
1092 token_getmad($2,$$,'(');
1093 token_getmad($4,$$,')');
1099 /* "my" declarations, with optional attributes */
1100 myattrterm: MY myterm myattrlist
1101 { $$ = my_attrs($2,$3);
1102 token_getmad($1,$$,'d');
1103 append_madprops($3->op_madprop, $$, 'a');
1107 { $$ = localize($2,($1)->tk_lval.ival);
1108 token_getmad($1,$$,'d');
1112 /* Things that can be "my"'d */
1113 myterm : '(' expr ')'
1114 { $$ = sawparens($2);
1115 token_getmad($1,$$,'(');
1116 token_getmad($3,$$,')');
1119 { $$ = sawparens(newNULLLIST());
1120 token_getmad($1,$$,'(');
1121 token_getmad($2,$$,')');
1131 /* Basic list expressions */
1132 listexpr: /* NULL */ %prec PREC_LOW
1134 | argexpr %prec PREC_LOW
1138 listexprcom: /* NULL */
1143 { OP* op = newNULLLIST();
1144 token_getmad($2,op,',');
1145 $$ = append_elem(OP_LIST, $1, op);
1149 /* A little bit of trickery to make "for my $foo (@bar)" actually be
1152 { PL_in_my = 0; $$ = my($1); }
1156 { $$ = newCVREF(($1)->tk_lval.ival,$2);
1157 token_getmad($1,$$,'&');
1161 scalar : '$' indirob
1162 { $$ = newSVREF($2);
1163 token_getmad($1,$$,'$');
1168 { $$ = newAVREF($2);
1169 token_getmad($1,$$,'@');
1174 { $$ = newHVREF($2);
1175 token_getmad($1,$$,'%');
1179 arylen : DOLSHARP indirob
1180 { $$ = newAVREF($2);
1181 token_getmad($1,$$,'l');
1186 { $$ = newGVREF(0,$2);
1187 token_getmad($1,$$,'*');
1191 /* Indirect objects */
1193 { $$ = scalar($1); }
1194 | scalar %prec PREC_LOW
1195 { $$ = scalar($1); }