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