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a0d0e21e 1/* perly.y
a687059c 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
a687059c 4 *
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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.
8d063cd8 7 *
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8 */
9
10/*
11 * 'I see,' laughed Strider. 'I look foul and feel fair. Is that it?
14a38fd5 12 * All that is gold does not glitter, not all those who wander are lost.'
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13 */
14
15%{
79072805 16#include "EXTERN.h"
8d063cd8 17#include "perl.h"
378cc40b 18
a0d0e21e 19static void
8ac85365 20dep(void)
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21{
22 deprecate("\"do\" to call subroutines");
23}
f0fcb552 24
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25%}
26
27%start prog
28
9d116dd7 29%{
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30/* I sense a Big Blue pattern here... */
31#if !defined(OEMVS) && !defined(__OPEN_VM) && !defined(POSIX_BC)
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32%}
33
8d063cd8 34%union {
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35 I32 ival;
36 char *pval;
37 OP *opval;
38 GV *gvval;
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39}
40
9d116dd7 41%{
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42#endif /* !OEMVS && !__OPEN_VM && !POSIX_BC */
43
44#ifdef USE_PURE_BISON
bee8cd07 45#define YYLEX_PARAM (&yychar)
a1a0e61e 46#endif
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47%}
48
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49%token <ival> '{' ')'
50
a0d0e21e 51%token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF
4633a7c4 52%token <opval> FUNC0SUB UNIOPSUB LSTOPSUB
79072805 53%token <pval> LABEL
a0d0e21e 54%token <ival> FORMAT SUB ANONSUB PACKAGE USE
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55%token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
56%token <ival> LOOPEX DOTDOT
36477c24 57%token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP
79072805 58%token <ival> RELOP EQOP MULOP ADDOP
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59%token <ival> DOLSHARP DO HASHBRACK NOAMP
60%token LOCAL MY
79072805 61
44a8e56a 62%type <ival> prog decl local format startsub startanonsub startformsub
28757baa 63%type <ival> remember mremember '&'
bbce6d69 64%type <opval> block mblock lineseq line loop cond else
a0d0e21e 65%type <opval> expr term scalar ary hsh arylen star amper sideff
bbce6d69 66%type <opval> argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr
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67%type <opval> listexpr listexprcom indirob listop method
68%type <opval> formname subname proto subbody cont my_scalar
79072805 69%type <pval> label
79072805 70
a0d0e21e 71%left <ival> OROP
463ee0b2 72%left ANDOP
c07a80fd 73%right NOTOP
36477c24 74%nonassoc LSTOP LSTOPSUB
8d063cd8 75%left ','
a0d0e21e 76%right <ival> ASSIGNOP
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77%right '?' ':'
78%nonassoc DOTDOT
79%left OROR
80%left ANDAND
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81%left <ival> BITOROP
82%left <ival> BITANDOP
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83%nonassoc EQOP
84%nonassoc RELOP
36477c24 85%nonassoc UNIOP UNIOPSUB
79072805 86%left <ival> SHIFTOP
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87%left ADDOP
88%left MULOP
8990e307 89%left <ival> MATCHOP
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90%right '!' '~' UMINUS REFGEN
91%right <ival> POWOP
92%nonassoc PREINC PREDEC POSTINC POSTDEC
8990e307 93%left ARROW
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94%left '('
95
96%% /* RULES */
97
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98prog : /* NULL */
99 {
100#if defined(YYDEBUG) && defined(DEBUGGING)
3280af22 101 yydebug = (PL_debug & 1);
ae986130 102#endif
3280af22 103 PL_expect = XSTATE;
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104 }
105 /*CONTINUED*/ lineseq
a0d0e21e 106 { newPROG($2); }
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107 ;
108
a687059c 109block : '{' remember lineseq '}'
3280af22
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110 { if (PL_copline > (line_t)$1)
111 PL_copline = $1;
36477c24 112 $$ = block_end($2, $3); }
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113 ;
114
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115remember: /* NULL */ /* start a full lexical scope */
116 { $$ = block_start(TRUE); }
117 ;
118
bbce6d69 119mblock : '{' mremember lineseq '}'
3280af22
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120 { if (PL_copline > (line_t)$1)
121 PL_copline = $1;
36477c24 122 $$ = block_end($2, $3); }
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123 ;
124
125mremember: /* NULL */ /* start a partial lexical scope */
126 { $$ = block_start(FALSE); }
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127 ;
128
129lineseq : /* NULL */
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130 { $$ = Nullop; }
131 | lineseq decl
132 { $$ = $1; }
8d063cd8 133 | lineseq line
463ee0b2 134 { $$ = append_list(OP_LINESEQ,
a0d0e21e 135 (LISTOP*)$1, (LISTOP*)$2);
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136 PL_pad_reset_pending = TRUE;
137 if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; }
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138 ;
139
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140line : label cond
141 { $$ = newSTATEOP(0, $1, $2); }
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142 | loop /* loops add their own labels */
143 | label ';'
144 { if ($1 != Nullch) {
79072805 145 $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0));
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146 }
147 else {
79072805 148 $$ = Nullop;
3280af22 149 PL_copline = NOLINE;
32c2e4fb 150 }
3280af22 151 PL_expect = XSTATE; }
8d063cd8 152 | label sideff ';'
79072805 153 { $$ = newSTATEOP(0, $1, $2);
3280af22 154 PL_expect = XSTATE; }
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155 ;
156
a687059c 157sideff : error
79072805 158 { $$ = Nullop; }
a687059c 159 | expr
79072805 160 { $$ = $1; }
a687059c 161 | expr IF expr
79072805 162 { $$ = newLOGOP(OP_AND, 0, $3, $1); }
a687059c 163 | expr UNLESS expr
79072805 164 { $$ = newLOGOP(OP_OR, 0, $3, $1); }
a687059c 165 | expr WHILE expr
8990e307 166 { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); }
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167 | expr UNTIL iexpr
168 { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);}
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169 | expr FOR expr
170 { $$ = newFOROP(0, Nullch, $2,
171 Nullop, $3, $1, Nullop); }
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172 ;
173
174else : /* NULL */
175 { $$ = Nullop; }
55497cff 176 | ELSE mblock
79072805 177 { $$ = scope($2); }
55497cff 178 | ELSIF '(' mexpr ')' mblock else
3280af22 179 { PL_copline = $1;
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180 $$ = newSTATEOP(0, Nullch,
181 newCONDOP(0, $3, scope($5), $6));
3280af22 182 PL_hints |= HINT_BLOCK_SCOPE; }
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183 ;
184
55497cff 185cond : IF '(' remember mexpr ')' mblock else
3280af22 186 { PL_copline = $1;
36477c24 187 $$ = block_end($3,
bbce6d69 188 newCONDOP(0, $4, scope($6), $7)); }
55497cff 189 | UNLESS '(' remember miexpr ')' mblock else
3280af22 190 { PL_copline = $1;
36477c24 191 $$ = block_end($3,
bbce6d69 192 newCONDOP(0, $4, scope($6), $7)); }
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193 ;
194
195cont : /* NULL */
196 { $$ = Nullop; }
197 | CONTINUE block
198 { $$ = scope($2); }
199 ;
200
55497cff 201loop : label WHILE '(' remember mtexpr ')' mblock cont
3280af22 202 { PL_copline = $2;
36477c24 203 $$ = block_end($4,
55497cff 204 newSTATEOP(0, $1,
bbce6d69 205 newWHILEOP(0, 1, (LOOP*)Nullop,
fb73857a 206 $2, $5, $7, $8))); }
55497cff 207 | label UNTIL '(' remember miexpr ')' mblock cont
3280af22 208 { PL_copline = $2;
36477c24 209 $$ = block_end($4,
55497cff 210 newSTATEOP(0, $1,
bbce6d69 211 newWHILEOP(0, 1, (LOOP*)Nullop,
fb73857a 212 $2, $5, $7, $8))); }
bbce6d69 213 | label FOR MY remember my_scalar '(' mexpr ')' mblock cont
36477c24 214 { $$ = block_end($4,
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215 newFOROP(0, $1, $2, $5, $7, $9, $10)); }
216 | label FOR scalar '(' remember mexpr ')' mblock cont
36477c24 217 { $$ = block_end($5,
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218 newFOROP(0, $1, $2, mod($3, OP_ENTERLOOP),
219 $6, $8, $9)); }
220 | label FOR '(' remember mexpr ')' mblock cont
36477c24 221 { $$ = block_end($4,
55497cff 222 newFOROP(0, $1, $2, Nullop, $5, $7, $8)); }
bbce6d69 223 | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock
8d063cd8 224 /* basically fake up an initialize-while lineseq */
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225 { OP *forop = append_elem(OP_LINESEQ,
226 scalar($5),
227 newWHILEOP(0, 1, (LOOP*)Nullop,
228 $2, scalar($7),
229 $11, scalar($9)));
3280af22 230 PL_copline = $2;
fb73857a 231 $$ = block_end($4, newSTATEOP(0, $1, forop)); }
79072805 232 | label block cont /* a block is a loop that happens once */
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233 { $$ = newSTATEOP(0, $1,
234 newWHILEOP(0, 1, (LOOP*)Nullop,
235 NOLINE, Nullop, $2, $3)); }
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236 ;
237
238nexpr : /* NULL */
79072805 239 { $$ = Nullop; }
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240 | sideff
241 ;
242
243texpr : /* NULL means true */
79072805 244 { (void)scan_num("1"); $$ = yylval.opval; }
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245 | expr
246 ;
247
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248iexpr : expr
249 { $$ = invert(scalar($1)); }
250 ;
251
252mexpr : expr
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253 { $$ = $1; intro_my(); }
254 ;
255
256mnexpr : nexpr
257 { $$ = $1; intro_my(); }
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258 ;
259
260mtexpr : texpr
bbce6d69 261 { $$ = $1; intro_my(); }
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262 ;
263
264miexpr : iexpr
bbce6d69 265 { $$ = $1; intro_my(); }
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266 ;
267
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268label : /* empty */
269 { $$ = Nullch; }
32c2e4fb 270 | LABEL
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271 ;
272
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273decl : format
274 { $$ = 0; }
275 | subrout
276 { $$ = 0; }
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277 | package
278 { $$ = 0; }
a0d0e21e 279 | use
85e6fe83 280 { $$ = 0; }
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281 ;
282
44a8e56a 283format : FORMAT startformsub formname block
a0d0e21e 284 { newFORM($2, $3, $4); }
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285 ;
286
287formname: WORD { $$ = $1; }
288 | /* NULL */ { $$ = Nullop; }
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289 ;
290
28757baa 291subrout : SUB startsub subname proto subbody
4633a7c4 292 { newSUB($2, $3, $4, $5); }
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293 ;
294
fa83b5b6 295startsub: /* NULL */ /* start a regular subroutine scope */
774d564b 296 { $$ = start_subparse(FALSE, 0); }
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297 ;
298
299startanonsub: /* NULL */ /* start an anonymous subroutine scope */
774d564b 300 { $$ = start_subparse(FALSE, CVf_ANON); }
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301 ;
302
44a8e56a 303startformsub: /* NULL */ /* start a format subroutine scope */
774d564b 304 { $$ = start_subparse(TRUE, 0); }
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305 ;
306
3280af22 307subname : WORD { char *name = SvPV(((SVOP*)$1)->op_sv, PL_na);
e858de61 308 if (strEQ(name, "BEGIN") || strEQ(name, "END")
7d07dbc2 309 || strEQ(name, "INIT"))
3280af22 310 CvUNIQUE_on(PL_compcv);
28757baa 311 $$ = $1; }
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312 ;
313
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314proto : /* NULL */
315 { $$ = Nullop; }
316 | THING
317 ;
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318
319subbody : block { $$ = $1; }
3280af22 320 | ';' { $$ = Nullop; PL_expect = XSTATE; }
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321 ;
322
a687059c 323package : PACKAGE WORD ';'
79072805 324 { package($2); }
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325 | PACKAGE ';'
326 { package(Nullop); }
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327 ;
328
28757baa 329use : USE startsub
3280af22 330 { CvUNIQUE_on(PL_compcv); /* It's a BEGIN {} */ }
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331 WORD WORD listexpr ';'
332 { utilize($1, $2, $4, $5, $6); }
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333 ;
334
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335expr : expr ANDOP expr
336 { $$ = newLOGOP(OP_AND, 0, $1, $3); }
337 | expr OROP expr
338 { $$ = newLOGOP($2, 0, $1, $3); }
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339 | argexpr
340 ;
341
342argexpr : argexpr ','
343 { $$ = $1; }
344 | argexpr ',' term
79072805 345 { $$ = append_elem(OP_LIST, $1, $3); }
a0d0e21e 346 | term
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347 ;
348
a0d0e21e 349listop : LSTOP indirob argexpr
79072805 350 { $$ = convert($1, OPf_STACKED,
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351 prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); }
352 | FUNC '(' indirob expr ')'
79072805 353 { $$ = convert($1, OPf_STACKED,
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354 prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); }
355 | term ARROW method '(' listexprcom ')'
4633a7c4 356 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
a0d0e21e 357 append_elem(OP_LIST,
55497cff 358 prepend_elem(OP_LIST, scalar($1), $5),
a0d0e21e 359 newUNOP(OP_METHOD, 0, $3))); }
79072805 360 | METHOD indirob listexpr
4633a7c4 361 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
a0d0e21e 362 append_elem(OP_LIST,
4633a7c4 363 prepend_elem(OP_LIST, $2, $3),
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364 newUNOP(OP_METHOD, 0, $1))); }
365 | FUNCMETH indirob '(' listexprcom ')'
4633a7c4 366 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
a0d0e21e 367 append_elem(OP_LIST,
4633a7c4 368 prepend_elem(OP_LIST, $2, $4),
a0d0e21e 369 newUNOP(OP_METHOD, 0, $1))); }
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370 | LSTOP listexpr
371 { $$ = convert($1, 0, $2); }
a0d0e21e 372 | FUNC '(' listexprcom ')'
79072805 373 { $$ = convert($1, 0, $3); }
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374 | LSTOPSUB startanonsub block
375 { $3 = newANONSUB($2, 0, $3); }
376 listexpr %prec LSTOP
4633a7c4 377 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
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378 append_elem(OP_LIST,
379 prepend_elem(OP_LIST, $3, $5), $1)); }
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380 ;
381
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382method : METHOD
383 | scalar
384 ;
385
386term : term ASSIGNOP term
387 { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); }
388 | term POWOP term
79072805 389 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 390 | term MULOP term
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391 { if ($2 != OP_REPEAT)
392 scalar($1);
393 $$ = newBINOP($2, 0, $1, scalar($3)); }
a0d0e21e 394 | term ADDOP term
79072805 395 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 396 | term SHIFTOP term
79072805 397 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 398 | term RELOP term
79072805 399 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 400 | term EQOP term
79072805 401 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 402 | term BITANDOP term
79072805 403 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 404 | term BITOROP term
79072805 405 { $$ = newBINOP($2, 0, scalar($1), scalar($3)); }
a0d0e21e 406 | term DOTDOT term
79072805 407 { $$ = newRANGE($2, scalar($1), scalar($3));}
a0d0e21e 408 | term ANDAND term
463ee0b2 409 { $$ = newLOGOP(OP_AND, 0, $1, $3); }
a0d0e21e 410 | term OROR term
463ee0b2 411 { $$ = newLOGOP(OP_OR, 0, $1, $3); }
a0d0e21e 412 | term '?' term ':' term
79072805 413 { $$ = newCONDOP(0, $1, $3, $5); }
a0d0e21e 414 | term MATCHOP term
79072805 415 { $$ = bind_match($2, $1, $3); }
8d063cd8 416
a0d0e21e 417 | '-' term %prec UMINUS
79072805 418 { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); }
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419 | '+' term %prec UMINUS
420 { $$ = $2; }
8d063cd8 421 | '!' term
79072805 422 { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
8d063cd8 423 | '~' term
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424 { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));}
425 | REFGEN term
a0d0e21e 426 { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); }
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427 | term POSTINC
428 { $$ = newUNOP(OP_POSTINC, 0,
463ee0b2 429 mod(scalar($1), OP_POSTINC)); }
79072805
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430 | term POSTDEC
431 { $$ = newUNOP(OP_POSTDEC, 0,
463ee0b2 432 mod(scalar($1), OP_POSTDEC)); }
79072805
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433 | PREINC term
434 { $$ = newUNOP(OP_PREINC, 0,
463ee0b2 435 mod(scalar($2), OP_PREINC)); }
79072805
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436 | PREDEC term
437 { $$ = newUNOP(OP_PREDEC, 0,
463ee0b2 438 mod(scalar($2), OP_PREDEC)); }
55497cff 439 | local term %prec UNIOP
93a17b20 440 { $$ = localize($2,$1); }
a0d0e21e 441 | '(' expr ')'
79072805 442 { $$ = sawparens($2); }
8d063cd8 443 | '(' ')'
8990e307 444 { $$ = sawparens(newNULLLIST()); }
a0d0e21e 445 | '[' expr ']' %prec '('
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446 { $$ = newANONLIST($2); }
447 | '[' ']' %prec '('
448 { $$ = newANONLIST(Nullop); }
a0d0e21e 449 | HASHBRACK expr ';' '}' %prec '('
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450 { $$ = newANONHASH($2); }
451 | HASHBRACK ';' '}' %prec '('
452 { $$ = newANONHASH(Nullop); }
28757baa 453 | ANONSUB startanonsub proto block %prec '('
4633a7c4 454 { $$ = newANONSUB($2, $3, $4); }
79072805 455 | scalar %prec '('
8d063cd8 456 { $$ = $1; }
c07a80fd 457 | star '{' expr ';' '}'
640b9ef6 458 { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); }
79072805 459 | star %prec '('
8d063cd8 460 { $$ = $1; }
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461 | scalar '[' expr ']' %prec '('
462 { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); }
463 | term ARROW '[' expr ']' %prec '('
464 { $$ = newBINOP(OP_AELEM, 0,
8990e307 465 ref(newAVREF($1),OP_RV2AV),
79072805 466 scalar($4));}
463ee0b2 467 | term '[' expr ']' %prec '('
a0d0e21e 468 { assertref($1); $$ = newBINOP(OP_AELEM, 0,
8990e307 469 ref(newAVREF($1),OP_RV2AV),
463ee0b2 470 scalar($3));}
79072805 471 | hsh %prec '('
8d063cd8 472 { $$ = $1; }
79072805 473 | ary %prec '('
8d063cd8 474 { $$ = $1; }
79072805
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475 | arylen %prec '('
476 { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
477 | scalar '{' expr ';' '}' %prec '('
478 { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
3280af22 479 PL_expect = XOPERATOR; }
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480 | term ARROW '{' expr ';' '}' %prec '('
481 { $$ = newBINOP(OP_HELEM, 0,
8990e307 482 ref(newHVREF($1),OP_RV2HV),
79072805 483 jmaybe($4));
3280af22 484 PL_expect = XOPERATOR; }
463ee0b2 485 | term '{' expr ';' '}' %prec '('
a0d0e21e 486 { assertref($1); $$ = newBINOP(OP_HELEM, 0,
8990e307 487 ref(newHVREF($1),OP_RV2HV),
463ee0b2 488 jmaybe($3));
3280af22 489 PL_expect = XOPERATOR; }
a0d0e21e 490 | '(' expr ')' '[' expr ']' %prec '('
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491 { $$ = newSLICEOP(0, $5, $2); }
492 | '(' ')' '[' expr ']' %prec '('
493 { $$ = newSLICEOP(0, $4, Nullop); }
494 | ary '[' expr ']' %prec '('
495 { $$ = prepend_elem(OP_ASLICE,
496 newOP(OP_PUSHMARK, 0),
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497 newLISTOP(OP_ASLICE, 0,
498 list($3),
a0d0e21e 499 ref($1, OP_ASLICE))); }
79072805
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500 | ary '{' expr ';' '}' %prec '('
501 { $$ = prepend_elem(OP_HSLICE,
502 newOP(OP_PUSHMARK, 0),
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503 newLISTOP(OP_HSLICE, 0,
504 list($3),
a0d0e21e 505 ref(oopsHV($1), OP_HSLICE)));
3280af22 506 PL_expect = XOPERATOR; }
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507 | THING %prec '('
508 { $$ = $1; }
509 | amper
c07a80fd 510 { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
79072805 511 | amper '(' ')'
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512 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
513 | amper '(' expr ')'
514 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
4633a7c4 515 append_elem(OP_LIST, $3, scalar($1))); }
93a17b20 516 | NOAMP WORD listexpr
a0d0e21e 517 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
a5f75d66 518 append_elem(OP_LIST, $3, scalar($2))); }
a0d0e21e 519 | DO term %prec UNIOP
78ca652e 520 { $$ = dofile($2); }
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521 | DO block %prec '('
522 { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); }
8d063cd8 523 | DO WORD '(' ')'
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524 { $$ = newUNOP(OP_ENTERSUB,
525 OPf_SPECIAL|OPf_STACKED,
4633a7c4 526 prepend_elem(OP_LIST,
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527 scalar(newCVREF(
528 (OPpENTERSUB_AMPER<<8),
529 scalar($2)
530 )),Nullop)); dep();}
a0d0e21e 531 | DO WORD '(' expr ')'
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532 { $$ = newUNOP(OP_ENTERSUB,
533 OPf_SPECIAL|OPf_STACKED,
4633a7c4 534 append_elem(OP_LIST,
a0d0e21e 535 $4,
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536 scalar(newCVREF(
537 (OPpENTERSUB_AMPER<<8),
538 scalar($2)
539 )))); dep();}
79072805 540 | DO scalar '(' ')'
a0d0e21e 541 { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
4633a7c4 542 prepend_elem(OP_LIST,
c07a80fd 543 scalar(newCVREF(0,scalar($2))), Nullop)); dep();}
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544 | DO scalar '(' expr ')'
545 { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED,
4633a7c4 546 prepend_elem(OP_LIST,
a0d0e21e 547 $4,
c07a80fd 548 scalar(newCVREF(0,scalar($2))))); dep();}
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549 | term ARROW '(' ')' %prec '('
550 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
551 newCVREF(0, scalar($1))); }
552 | term ARROW '(' expr ')' %prec '('
553 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
554 append_elem(OP_LIST, $4,
555 newCVREF(0, scalar($1)))); }
8d063cd8 556 | LOOPEX
85e6fe83 557 { $$ = newOP($1, OPf_SPECIAL);
3280af22 558 PL_hints |= HINT_BLOCK_SCOPE; }
a0d0e21e 559 | LOOPEX term
8990e307 560 { $$ = newLOOPEX($1,$2); }
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561 | NOTOP argexpr
562 { $$ = newUNOP(OP_NOT, 0, scalar($2)); }
8d063cd8 563 | UNIOP
79072805 564 { $$ = newOP($1, 0); }
f0fcb552 565 | UNIOP block
79072805 566 { $$ = newUNOP($1, 0, $2); }
a0d0e21e 567 | UNIOP term
79072805 568 { $$ = newUNOP($1, 0, $2); }
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569 | UNIOPSUB term
570 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
571 append_elem(OP_LIST, $2, scalar($1))); }
8d063cd8 572 | FUNC0
79072805 573 { $$ = newOP($1, 0); }
ae986130 574 | FUNC0 '(' ')'
79072805 575 { $$ = newOP($1, 0); }
4633a7c4 576 | FUNC0SUB
28757baa 577 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
4633a7c4 578 scalar($1)); }
03a14243 579 | FUNC1 '(' ')'
79072805 580 { $$ = newOP($1, OPf_SPECIAL); }
8d063cd8 581 | FUNC1 '(' expr ')'
79072805 582 { $$ = newUNOP($1, 0, $3); }
a0d0e21e 583 | PMFUNC '(' term ')'
79072805 584 { $$ = pmruntime($1, $3, Nullop); }
a0d0e21e 585 | PMFUNC '(' term ',' term ')'
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586 { $$ = pmruntime($1, $3, $5); }
587 | WORD
378cc40b 588 | listop
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589 ;
590
79072805 591listexpr: /* NULL */
8990e307 592 { $$ = Nullop; }
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593 | argexpr
594 { $$ = $1; }
595 ;
596
597listexprcom: /* NULL */
598 { $$ = Nullop; }
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599 | expr
600 { $$ = $1; }
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601 | expr ','
602 { $$ = $1; }
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603 ;
604
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605local : LOCAL { $$ = 0; }
606 | MY { $$ = 1; }
607 ;
608
609my_scalar: scalar
3280af22 610 { PL_in_my = 0; $$ = my($1); }
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611 ;
612
79072805 613amper : '&' indirob
c07a80fd 614 { $$ = newCVREF($1,$2); }
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615 ;
616
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617scalar : '$' indirob
618 { $$ = newSVREF($2); }
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619 ;
620
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621ary : '@' indirob
622 { $$ = newAVREF($2); }
623 ;
624
625hsh : '%' indirob
626 { $$ = newHVREF($2); }
627 ;
628
629arylen : DOLSHARP indirob
630 { $$ = newAVREF($2); }
631 ;
632
633star : '*' indirob
a0d0e21e 634 { $$ = newGVREF(0,$2); }
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635 ;
636
637indirob : WORD
638 { $$ = scalar($1); }
639 | scalar
463ee0b2 640 { $$ = scalar($1); }
79072805 641 | block
a0d0e21e 642 { $$ = scope($1); }
79072805 643
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644 | PRIVATEREF
645 { $$ = $1; }
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646 ;
647
648%% /* PROGRAM */