| 1 | /* perly.y |
| 2 | * |
| 3 | * Copyright (c) 1991-1994, 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 that wander are lost.' |
| 13 | */ |
| 14 | |
| 15 | %{ |
| 16 | #include "EXTERN.h" |
| 17 | #include "perl.h" |
| 18 | |
| 19 | static void |
| 20 | dep() |
| 21 | { |
| 22 | deprecate("\"do\" to call subroutines"); |
| 23 | } |
| 24 | |
| 25 | %} |
| 26 | |
| 27 | %start prog |
| 28 | |
| 29 | %union { |
| 30 | I32 ival; |
| 31 | char *pval; |
| 32 | OP *opval; |
| 33 | GV *gvval; |
| 34 | } |
| 35 | |
| 36 | %token <ival> '{' ')' |
| 37 | |
| 38 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF |
| 39 | %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB |
| 40 | %token <pval> LABEL |
| 41 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE |
| 42 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR |
| 43 | %token <ival> LOOPEX DOTDOT |
| 44 | %token <ival> FUNC0 FUNC1 FUNC |
| 45 | %token <ival> RELOP EQOP MULOP ADDOP |
| 46 | %token <ival> DOLSHARP DO LOCAL HASHBRACK NOAMP |
| 47 | |
| 48 | %type <ival> prog decl format remember startsub '&' |
| 49 | %type <opval> block lineseq line loop cond nexpr else argexpr |
| 50 | %type <opval> expr term scalar ary hsh arylen star amper sideff |
| 51 | %type <opval> listexpr listexprcom indirob |
| 52 | %type <opval> texpr listop method proto |
| 53 | %type <pval> label |
| 54 | %type <opval> cont |
| 55 | |
| 56 | %left <ival> OROP |
| 57 | %left ANDOP |
| 58 | %right NOTOP |
| 59 | %nonassoc <ival> LSTOP |
| 60 | %left ',' |
| 61 | %right <ival> ASSIGNOP |
| 62 | %right '?' ':' |
| 63 | %nonassoc DOTDOT |
| 64 | %left OROR |
| 65 | %left ANDAND |
| 66 | %left <ival> BITOROP |
| 67 | %left <ival> BITANDOP |
| 68 | %nonassoc EQOP |
| 69 | %nonassoc RELOP |
| 70 | %nonassoc <ival> UNIOP |
| 71 | %left <ival> SHIFTOP |
| 72 | %left ADDOP |
| 73 | %left MULOP |
| 74 | %left <ival> MATCHOP |
| 75 | %right '!' '~' UMINUS REFGEN |
| 76 | %right <ival> POWOP |
| 77 | %nonassoc PREINC PREDEC POSTINC POSTDEC |
| 78 | %left ARROW |
| 79 | %left '(' |
| 80 | |
| 81 | %% /* RULES */ |
| 82 | |
| 83 | prog : /* NULL */ |
| 84 | { |
| 85 | #if defined(YYDEBUG) && defined(DEBUGGING) |
| 86 | yydebug = (debug & 1); |
| 87 | #endif |
| 88 | expect = XSTATE; |
| 89 | } |
| 90 | /*CONTINUED*/ lineseq |
| 91 | { newPROG($2); } |
| 92 | ; |
| 93 | |
| 94 | block : '{' remember lineseq '}' |
| 95 | { $$ = block_end($1,$2,$3); } |
| 96 | ; |
| 97 | |
| 98 | remember: /* NULL */ /* start a lexical scope */ |
| 99 | { $$ = block_start(); } |
| 100 | ; |
| 101 | |
| 102 | lineseq : /* NULL */ |
| 103 | { $$ = Nullop; } |
| 104 | | lineseq decl |
| 105 | { $$ = $1; } |
| 106 | | lineseq line |
| 107 | { $$ = append_list(OP_LINESEQ, |
| 108 | (LISTOP*)$1, (LISTOP*)$2); |
| 109 | pad_reset_pending = TRUE; |
| 110 | if ($1 && $2) hints |= HINT_BLOCK_SCOPE; } |
| 111 | ; |
| 112 | |
| 113 | line : label cond |
| 114 | { $$ = newSTATEOP(0, $1, $2); } |
| 115 | | loop /* loops add their own labels */ |
| 116 | | label ';' |
| 117 | { if ($1 != Nullch) { |
| 118 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
| 119 | } |
| 120 | else { |
| 121 | $$ = Nullop; |
| 122 | copline = NOLINE; |
| 123 | } |
| 124 | expect = XSTATE; } |
| 125 | | label sideff ';' |
| 126 | { $$ = newSTATEOP(0, $1, $2); |
| 127 | expect = XSTATE; } |
| 128 | ; |
| 129 | |
| 130 | sideff : error |
| 131 | { $$ = Nullop; } |
| 132 | | expr |
| 133 | { $$ = $1; } |
| 134 | | expr IF expr |
| 135 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
| 136 | | expr UNLESS expr |
| 137 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
| 138 | | expr WHILE expr |
| 139 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
| 140 | | expr UNTIL expr |
| 141 | { $$ = newLOOPOP(OPf_PARENS, 1, invert(scalar($3)), $1);} |
| 142 | ; |
| 143 | |
| 144 | else : /* NULL */ |
| 145 | { $$ = Nullop; } |
| 146 | | ELSE block |
| 147 | { $$ = scope($2); } |
| 148 | | ELSIF '(' expr ')' block else |
| 149 | { copline = $1; |
| 150 | $$ = newSTATEOP(0, 0, |
| 151 | newCONDOP(0, $3, scope($5), $6)); |
| 152 | hints |= HINT_BLOCK_SCOPE; } |
| 153 | ; |
| 154 | |
| 155 | cond : IF '(' expr ')' block else |
| 156 | { copline = $1; |
| 157 | $$ = newCONDOP(0, $3, scope($5), $6); } |
| 158 | | UNLESS '(' expr ')' block else |
| 159 | { copline = $1; |
| 160 | $$ = newCONDOP(0, |
| 161 | invert(scalar($3)), scope($5), $6); } |
| 162 | | IF block block else |
| 163 | { copline = $1; |
| 164 | deprecate("if BLOCK BLOCK"); |
| 165 | $$ = newCONDOP(0, scope($2), scope($3), $4); } |
| 166 | | UNLESS block block else |
| 167 | { copline = $1; |
| 168 | deprecate("unless BLOCK BLOCK"); |
| 169 | $$ = newCONDOP(0, invert(scalar(scope($2))), |
| 170 | scope($3), $4); } |
| 171 | ; |
| 172 | |
| 173 | cont : /* NULL */ |
| 174 | { $$ = Nullop; } |
| 175 | | CONTINUE block |
| 176 | { $$ = scope($2); } |
| 177 | ; |
| 178 | |
| 179 | loop : label WHILE '(' texpr ')' block cont |
| 180 | { copline = $2; |
| 181 | $$ = newSTATEOP(0, $1, |
| 182 | newWHILEOP(0, 1, (LOOP*)Nullop, |
| 183 | $4, $6, $7) ); } |
| 184 | | label UNTIL '(' expr ')' block cont |
| 185 | { copline = $2; |
| 186 | $$ = newSTATEOP(0, $1, |
| 187 | newWHILEOP(0, 1, (LOOP*)Nullop, |
| 188 | invert(scalar($4)), $6, $7) ); } |
| 189 | | label WHILE block block cont |
| 190 | { copline = $2; |
| 191 | $$ = newSTATEOP(0, $1, |
| 192 | newWHILEOP(0, 1, (LOOP*)Nullop, |
| 193 | scope($3), $4, $5) ); } |
| 194 | | label UNTIL block block cont |
| 195 | { copline = $2; |
| 196 | $$ = newSTATEOP(0, $1, |
| 197 | newWHILEOP(0, 1, (LOOP*)Nullop, |
| 198 | invert(scalar(scope($3))), $4, $5)); } |
| 199 | | label FOR scalar '(' expr ')' block cont |
| 200 | { $$ = newFOROP(0, $1, $2, mod($3, OP_ENTERLOOP), |
| 201 | $5, $7, $8); } |
| 202 | | label FOR '(' expr ')' block cont |
| 203 | { $$ = newFOROP(0, $1, $2, Nullop, $4, $6, $7); } |
| 204 | | label FOR '(' nexpr ';' texpr ';' nexpr ')' block |
| 205 | /* basically fake up an initialize-while lineseq */ |
| 206 | { copline = $2; |
| 207 | $$ = append_elem(OP_LINESEQ, |
| 208 | newSTATEOP(0, $1, scalar($4)), |
| 209 | newSTATEOP(0, $1, |
| 210 | newWHILEOP(0, 1, (LOOP*)Nullop, |
| 211 | scalar($6), $10, scalar($8)) )); } |
| 212 | | label block cont /* a block is a loop that happens once */ |
| 213 | { $$ = newSTATEOP(0, |
| 214 | $1, newWHILEOP(0, 1, (LOOP*)Nullop, |
| 215 | Nullop, $2, $3)); } |
| 216 | ; |
| 217 | |
| 218 | nexpr : /* NULL */ |
| 219 | { $$ = Nullop; } |
| 220 | | sideff |
| 221 | ; |
| 222 | |
| 223 | texpr : /* NULL means true */ |
| 224 | { (void)scan_num("1"); $$ = yylval.opval; } |
| 225 | | expr |
| 226 | ; |
| 227 | |
| 228 | label : /* empty */ |
| 229 | { $$ = Nullch; } |
| 230 | | LABEL |
| 231 | ; |
| 232 | |
| 233 | decl : format |
| 234 | { $$ = 0; } |
| 235 | | subrout |
| 236 | { $$ = 0; } |
| 237 | | package |
| 238 | { $$ = 0; } |
| 239 | | use |
| 240 | { $$ = 0; } |
| 241 | ; |
| 242 | |
| 243 | format : FORMAT startsub WORD block |
| 244 | { newFORM($2, $3, $4); } |
| 245 | | FORMAT startsub block |
| 246 | { newFORM($2, Nullop, $3); } |
| 247 | ; |
| 248 | |
| 249 | subrout : SUB startsub WORD proto block |
| 250 | { newSUB($2, $3, $4, $5); } |
| 251 | | SUB startsub WORD proto ';' |
| 252 | { newSUB($2, $3, $4, Nullop); expect = XSTATE; } |
| 253 | ; |
| 254 | |
| 255 | proto : /* NULL */ |
| 256 | { $$ = Nullop; } |
| 257 | | THING |
| 258 | ; |
| 259 | |
| 260 | startsub: /* NULL */ /* start a subroutine scope */ |
| 261 | { $$ = start_subparse(); } |
| 262 | ; |
| 263 | |
| 264 | package : PACKAGE WORD ';' |
| 265 | { package($2); } |
| 266 | | PACKAGE ';' |
| 267 | { package(Nullop); } |
| 268 | ; |
| 269 | |
| 270 | use : USE startsub WORD listexpr ';' |
| 271 | { utilize($1, $2, $3, $4); } |
| 272 | ; |
| 273 | |
| 274 | expr : expr ANDOP expr |
| 275 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
| 276 | | expr OROP expr |
| 277 | { $$ = newLOGOP($2, 0, $1, $3); } |
| 278 | | argexpr |
| 279 | ; |
| 280 | |
| 281 | argexpr : argexpr ',' |
| 282 | { $$ = $1; } |
| 283 | | argexpr ',' term |
| 284 | { $$ = append_elem(OP_LIST, $1, $3); } |
| 285 | | term |
| 286 | ; |
| 287 | |
| 288 | listop : LSTOP indirob argexpr |
| 289 | { $$ = convert($1, OPf_STACKED, |
| 290 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
| 291 | | FUNC '(' indirob expr ')' |
| 292 | { $$ = convert($1, OPf_STACKED, |
| 293 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
| 294 | | term ARROW method '(' listexprcom ')' |
| 295 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
| 296 | append_elem(OP_LIST, |
| 297 | prepend_elem(OP_LIST, $1, $5), |
| 298 | newUNOP(OP_METHOD, 0, $3))); } |
| 299 | | METHOD indirob listexpr |
| 300 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
| 301 | append_elem(OP_LIST, |
| 302 | prepend_elem(OP_LIST, $2, $3), |
| 303 | newUNOP(OP_METHOD, 0, $1))); } |
| 304 | | FUNCMETH indirob '(' listexprcom ')' |
| 305 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
| 306 | append_elem(OP_LIST, |
| 307 | prepend_elem(OP_LIST, $2, $4), |
| 308 | newUNOP(OP_METHOD, 0, $1))); } |
| 309 | | LSTOP listexpr |
| 310 | { $$ = convert($1, 0, $2); } |
| 311 | | FUNC '(' listexprcom ')' |
| 312 | { $$ = convert($1, 0, $3); } |
| 313 | | LSTOPSUB startsub block listexpr %prec LSTOP |
| 314 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 315 | append_elem(OP_LIST, |
| 316 | prepend_elem(OP_LIST, newANONSUB($2, 0, $3), $4), |
| 317 | $1)); } |
| 318 | ; |
| 319 | |
| 320 | method : METHOD |
| 321 | | scalar |
| 322 | ; |
| 323 | |
| 324 | term : term ASSIGNOP term |
| 325 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
| 326 | | term POWOP term |
| 327 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 328 | | term MULOP term |
| 329 | { if ($2 != OP_REPEAT) |
| 330 | scalar($1); |
| 331 | $$ = newBINOP($2, 0, $1, scalar($3)); } |
| 332 | | term ADDOP term |
| 333 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 334 | | term SHIFTOP term |
| 335 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 336 | | term RELOP term |
| 337 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 338 | | term EQOP term |
| 339 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 340 | | term BITANDOP term |
| 341 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 342 | | term BITOROP term |
| 343 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
| 344 | | term DOTDOT term |
| 345 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
| 346 | | term ANDAND term |
| 347 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
| 348 | | term OROR term |
| 349 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
| 350 | | term '?' term ':' term |
| 351 | { $$ = newCONDOP(0, $1, $3, $5); } |
| 352 | | term MATCHOP term |
| 353 | { $$ = bind_match($2, $1, $3); } |
| 354 | |
| 355 | | '-' term %prec UMINUS |
| 356 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
| 357 | | '+' term %prec UMINUS |
| 358 | { $$ = $2; } |
| 359 | | '!' term |
| 360 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
| 361 | | '~' term |
| 362 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
| 363 | | REFGEN term |
| 364 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } |
| 365 | | term POSTINC |
| 366 | { $$ = newUNOP(OP_POSTINC, 0, |
| 367 | mod(scalar($1), OP_POSTINC)); } |
| 368 | | term POSTDEC |
| 369 | { $$ = newUNOP(OP_POSTDEC, 0, |
| 370 | mod(scalar($1), OP_POSTDEC)); } |
| 371 | | PREINC term |
| 372 | { $$ = newUNOP(OP_PREINC, 0, |
| 373 | mod(scalar($2), OP_PREINC)); } |
| 374 | | PREDEC term |
| 375 | { $$ = newUNOP(OP_PREDEC, 0, |
| 376 | mod(scalar($2), OP_PREDEC)); } |
| 377 | | LOCAL term %prec UNIOP |
| 378 | { $$ = localize($2,$1); } |
| 379 | | '(' expr ')' |
| 380 | { $$ = sawparens($2); } |
| 381 | | '(' ')' |
| 382 | { $$ = sawparens(newNULLLIST()); } |
| 383 | | '[' expr ']' %prec '(' |
| 384 | { $$ = newANONLIST($2); } |
| 385 | | '[' ']' %prec '(' |
| 386 | { $$ = newANONLIST(Nullop); } |
| 387 | | HASHBRACK expr ';' '}' %prec '(' |
| 388 | { $$ = newANONHASH($2); } |
| 389 | | HASHBRACK ';' '}' %prec '(' |
| 390 | { $$ = newANONHASH(Nullop); } |
| 391 | | ANONSUB startsub proto block %prec '(' |
| 392 | { $$ = newANONSUB($2, $3, $4); } |
| 393 | | scalar %prec '(' |
| 394 | { $$ = $1; } |
| 395 | | star '{' expr ';' '}' |
| 396 | { $$ = newBINOP(OP_GELEM, 0, newGVREF(0,$1), $3); } |
| 397 | | star %prec '(' |
| 398 | { $$ = $1; } |
| 399 | | scalar '[' expr ']' %prec '(' |
| 400 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
| 401 | | term ARROW '[' expr ']' %prec '(' |
| 402 | { $$ = newBINOP(OP_AELEM, 0, |
| 403 | ref(newAVREF($1),OP_RV2AV), |
| 404 | scalar($4));} |
| 405 | | term '[' expr ']' %prec '(' |
| 406 | { assertref($1); $$ = newBINOP(OP_AELEM, 0, |
| 407 | ref(newAVREF($1),OP_RV2AV), |
| 408 | scalar($3));} |
| 409 | | hsh %prec '(' |
| 410 | { $$ = $1; } |
| 411 | | ary %prec '(' |
| 412 | { $$ = $1; } |
| 413 | | arylen %prec '(' |
| 414 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
| 415 | | scalar '{' expr ';' '}' %prec '(' |
| 416 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
| 417 | expect = XOPERATOR; } |
| 418 | | term ARROW '{' expr ';' '}' %prec '(' |
| 419 | { $$ = newBINOP(OP_HELEM, 0, |
| 420 | ref(newHVREF($1),OP_RV2HV), |
| 421 | jmaybe($4)); |
| 422 | expect = XOPERATOR; } |
| 423 | | term '{' expr ';' '}' %prec '(' |
| 424 | { assertref($1); $$ = newBINOP(OP_HELEM, 0, |
| 425 | ref(newHVREF($1),OP_RV2HV), |
| 426 | jmaybe($3)); |
| 427 | expect = XOPERATOR; } |
| 428 | | '(' expr ')' '[' expr ']' %prec '(' |
| 429 | { $$ = newSLICEOP(0, $5, $2); } |
| 430 | | '(' ')' '[' expr ']' %prec '(' |
| 431 | { $$ = newSLICEOP(0, $4, Nullop); } |
| 432 | | ary '[' expr ']' %prec '(' |
| 433 | { $$ = prepend_elem(OP_ASLICE, |
| 434 | newOP(OP_PUSHMARK, 0), |
| 435 | newLISTOP(OP_ASLICE, 0, |
| 436 | list($3), |
| 437 | ref($1, OP_ASLICE))); } |
| 438 | | ary '{' expr ';' '}' %prec '(' |
| 439 | { $$ = prepend_elem(OP_HSLICE, |
| 440 | newOP(OP_PUSHMARK, 0), |
| 441 | newLISTOP(OP_HSLICE, 0, |
| 442 | list($3), |
| 443 | ref(oopsHV($1), OP_HSLICE))); |
| 444 | expect = XOPERATOR; } |
| 445 | | THING %prec '(' |
| 446 | { $$ = $1; } |
| 447 | | amper |
| 448 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
| 449 | | amper '(' ')' |
| 450 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
| 451 | | amper '(' expr ')' |
| 452 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 453 | append_elem(OP_LIST, $3, scalar($1))); } |
| 454 | | NOAMP WORD listexpr |
| 455 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 456 | append_elem(OP_LIST, |
| 457 | $3, newCVREF(0,scalar($2)))); } |
| 458 | | DO term %prec UNIOP |
| 459 | { $$ = newUNOP(OP_DOFILE, 0, scalar($2)); } |
| 460 | | DO block %prec '(' |
| 461 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } |
| 462 | | DO WORD '(' ')' |
| 463 | { $$ = newUNOP(OP_ENTERSUB, |
| 464 | OPf_SPECIAL|OPf_STACKED, |
| 465 | prepend_elem(OP_LIST, |
| 466 | scalar(newCVREF( |
| 467 | (OPpENTERSUB_AMPER<<8), |
| 468 | scalar($2) |
| 469 | )),Nullop)); dep();} |
| 470 | | DO WORD '(' expr ')' |
| 471 | { $$ = newUNOP(OP_ENTERSUB, |
| 472 | OPf_SPECIAL|OPf_STACKED, |
| 473 | append_elem(OP_LIST, |
| 474 | $4, |
| 475 | scalar(newCVREF( |
| 476 | (OPpENTERSUB_AMPER<<8), |
| 477 | scalar($2) |
| 478 | )))); dep();} |
| 479 | | DO scalar '(' ')' |
| 480 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, |
| 481 | prepend_elem(OP_LIST, |
| 482 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} |
| 483 | | DO scalar '(' expr ')' |
| 484 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, |
| 485 | prepend_elem(OP_LIST, |
| 486 | $4, |
| 487 | scalar(newCVREF(0,scalar($2))))); dep();} |
| 488 | | LOOPEX |
| 489 | { $$ = newOP($1, OPf_SPECIAL); |
| 490 | hints |= HINT_BLOCK_SCOPE; } |
| 491 | | LOOPEX term |
| 492 | { $$ = newLOOPEX($1,$2); } |
| 493 | | NOTOP argexpr |
| 494 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
| 495 | | UNIOP |
| 496 | { $$ = newOP($1, 0); } |
| 497 | | UNIOP block |
| 498 | { $$ = newUNOP($1, 0, $2); } |
| 499 | | UNIOP term |
| 500 | { $$ = newUNOP($1, 0, $2); } |
| 501 | | UNIOPSUB term |
| 502 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 503 | append_elem(OP_LIST, $2, scalar($1))); } |
| 504 | | FUNC0 |
| 505 | { $$ = newOP($1, 0); } |
| 506 | | FUNC0 '(' ')' |
| 507 | { $$ = newOP($1, 0); } |
| 508 | | FUNC0SUB |
| 509 | { $$ = newUNOP(OP_ENTERSUB, 0, |
| 510 | scalar($1)); } |
| 511 | | FUNC1 '(' ')' |
| 512 | { $$ = newOP($1, OPf_SPECIAL); } |
| 513 | | FUNC1 '(' expr ')' |
| 514 | { $$ = newUNOP($1, 0, $3); } |
| 515 | | PMFUNC '(' term ')' |
| 516 | { $$ = pmruntime($1, $3, Nullop); } |
| 517 | | PMFUNC '(' term ',' term ')' |
| 518 | { $$ = pmruntime($1, $3, $5); } |
| 519 | | WORD |
| 520 | | listop |
| 521 | ; |
| 522 | |
| 523 | listexpr: /* NULL */ |
| 524 | { $$ = Nullop; } |
| 525 | | argexpr |
| 526 | { $$ = $1; } |
| 527 | ; |
| 528 | |
| 529 | listexprcom: /* NULL */ |
| 530 | { $$ = Nullop; } |
| 531 | | expr |
| 532 | { $$ = $1; } |
| 533 | | expr ',' |
| 534 | { $$ = $1; } |
| 535 | ; |
| 536 | |
| 537 | amper : '&' indirob |
| 538 | { $$ = newCVREF($1,$2); } |
| 539 | ; |
| 540 | |
| 541 | scalar : '$' indirob |
| 542 | { $$ = newSVREF($2); } |
| 543 | ; |
| 544 | |
| 545 | ary : '@' indirob |
| 546 | { $$ = newAVREF($2); } |
| 547 | ; |
| 548 | |
| 549 | hsh : '%' indirob |
| 550 | { $$ = newHVREF($2); } |
| 551 | ; |
| 552 | |
| 553 | arylen : DOLSHARP indirob |
| 554 | { $$ = newAVREF($2); } |
| 555 | ; |
| 556 | |
| 557 | star : '*' indirob |
| 558 | { $$ = newGVREF(0,$2); } |
| 559 | ; |
| 560 | |
| 561 | indirob : WORD |
| 562 | { $$ = scalar($1); } |
| 563 | | scalar |
| 564 | { $$ = scalar($1); } |
| 565 | | block |
| 566 | { $$ = scope($1); } |
| 567 | |
| 568 | | PRIVATEREF |
| 569 | { $$ = $1; } |
| 570 | ; |
| 571 | |
| 572 | %% /* PROGRAM */ |