Commit | Line | Data |
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a0d0e21e | 1 | /* perly.y |
a687059c | 2 | * |
0de566d7 | 3 | * Copyright (c) 1991-2002, 2003, 2004 Larry Wall |
a687059c | 4 | * |
9ef589d8 LW |
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 | * |
a0d0e21e LW |
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.' |
8d063cd8 LW |
13 | */ |
14 | ||
166f8a29 DM |
15 | /* This file holds the grammar for the Perl language. If edited, you need |
16 | * to run regen_perly.pl, which re-creates the files perly.h, perly.tab | |
17 | * and perly.act which are derived from this. | |
18 | * | |
19 | * The main job of of this grammar is to call the various newFOO() | |
20 | * functions in op.c to build a syntax tree of OP structs. | |
61296642 | 21 | * It relies on the lexer in toke.c to do the tokenizing. |
166f8a29 DM |
22 | */ |
23 | ||
0de566d7 | 24 | /* Make the parser re-entrant. */ |
8d063cd8 | 25 | |
0de566d7 | 26 | %pure_parser |
8d063cd8 | 27 | |
0de566d7 | 28 | %start prog |
9d116dd7 | 29 | |
8d063cd8 | 30 | %union { |
79072805 LW |
31 | I32 ival; |
32 | char *pval; | |
33 | OP *opval; | |
34 | GV *gvval; | |
8d063cd8 LW |
35 | } |
36 | ||
fad39ff1 | 37 | %token <ival> '{' |
f0fcb552 | 38 | |
a0d0e21e | 39 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF |
4633a7c4 | 40 | %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB |
79072805 | 41 | %token <pval> LABEL |
a0d0e21e | 42 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE |
79072805 LW |
43 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR |
44 | %token <ival> LOOPEX DOTDOT | |
36477c24 | 45 | %token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP |
79072805 | 46 | %token <ival> RELOP EQOP MULOP ADDOP |
55497cff | 47 | %token <ival> DOLSHARP DO HASHBRACK NOAMP |
09bef843 SB |
48 | %token <ival> LOCAL MY MYSUB |
49 | %token COLONATTR | |
79072805 | 50 | |
09bef843 | 51 | %type <ival> prog decl format startsub startanonsub startformsub |
500bedb6 | 52 | %type <ival> progstart remember mremember '&' savescope |
bbce6d69 | 53 | %type <opval> block mblock lineseq line loop cond else |
fad39ff1 | 54 | %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff |
bbce6d69 | 55 | %type <opval> argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr |
44a8e56a | 56 | %type <opval> listexpr listexprcom indirob listop method |
57 | %type <opval> formname subname proto subbody cont my_scalar | |
09bef843 | 58 | %type <opval> subattrlist myattrlist mysubrout myattrterm myterm |
891be019 | 59 | %type <opval> termbinop termunop anonymous termdo |
79072805 | 60 | %type <pval> label |
79072805 | 61 | |
fad39ff1 SM |
62 | %nonassoc PREC_LOW |
63 | %nonassoc LOOPEX | |
64 | ||
c963b151 | 65 | %left <ival> OROP DOROP |
463ee0b2 | 66 | %left ANDOP |
c07a80fd | 67 | %right NOTOP |
36477c24 | 68 | %nonassoc LSTOP LSTOPSUB |
8d063cd8 | 69 | %left ',' |
a0d0e21e | 70 | %right <ival> ASSIGNOP |
8d063cd8 LW |
71 | %right '?' ':' |
72 | %nonassoc DOTDOT | |
c963b151 | 73 | %left OROR DORDOR |
8d063cd8 | 74 | %left ANDAND |
79072805 LW |
75 | %left <ival> BITOROP |
76 | %left <ival> BITANDOP | |
a687059c LW |
77 | %nonassoc EQOP |
78 | %nonassoc RELOP | |
36477c24 | 79 | %nonassoc UNIOP UNIOPSUB |
79072805 | 80 | %left <ival> SHIFTOP |
a687059c LW |
81 | %left ADDOP |
82 | %left MULOP | |
8990e307 | 83 | %left <ival> MATCHOP |
79072805 LW |
84 | %right '!' '~' UMINUS REFGEN |
85 | %right <ival> POWOP | |
86 | %nonassoc PREINC PREDEC POSTINC POSTDEC | |
8990e307 | 87 | %left ARROW |
fad39ff1 | 88 | %nonassoc <ival> ')' |
8d063cd8 | 89 | %left '(' |
fad39ff1 | 90 | %left '[' '{' |
8d063cd8 LW |
91 | |
92 | %% /* RULES */ | |
93 | ||
891be019 | 94 | /* The whole program */ |
ecb2f335 | 95 | prog : progstart |
ae986130 | 96 | /*CONTINUED*/ lineseq |
ecb2f335 | 97 | { $$ = $1; newPROG(block_end($1,$2)); } |
8d063cd8 LW |
98 | ; |
99 | ||
891be019 | 100 | /* An ordinary block */ |
a687059c | 101 | block : '{' remember lineseq '}' |
3280af22 | 102 | { if (PL_copline > (line_t)$1) |
eb160463 | 103 | PL_copline = (line_t)$1; |
36477c24 | 104 | $$ = block_end($2, $3); } |
a0d0e21e LW |
105 | ; |
106 | ||
55497cff | 107 | remember: /* NULL */ /* start a full lexical scope */ |
108 | { $$ = block_start(TRUE); } | |
109 | ; | |
110 | ||
ecb2f335 NIS |
111 | progstart: |
112 | { | |
ecb2f335 NIS |
113 | PL_expect = XSTATE; $$ = block_start(TRUE); |
114 | } | |
115 | ; | |
116 | ||
117 | ||
bbce6d69 | 118 | mblock : '{' mremember lineseq '}' |
3280af22 | 119 | { if (PL_copline > (line_t)$1) |
eb160463 | 120 | PL_copline = (line_t)$1; |
36477c24 | 121 | $$ = block_end($2, $3); } |
55497cff | 122 | ; |
123 | ||
124 | mremember: /* NULL */ /* start a partial lexical scope */ | |
125 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
126 | ; |
127 | ||
500bedb6 DM |
128 | savescope: /* NULL */ /* remember stack pos in case of error */ |
129 | { $$ = PL_savestack_ix; } | |
130 | ||
891be019 | 131 | /* A collection of "lines" in the program */ |
8d063cd8 | 132 | lineseq : /* NULL */ |
79072805 LW |
133 | { $$ = Nullop; } |
134 | | lineseq decl | |
135 | { $$ = $1; } | |
500bedb6 DM |
136 | | lineseq savescope line |
137 | { LEAVE_SCOPE($2); | |
138 | $$ = append_list(OP_LINESEQ, | |
139 | (LISTOP*)$1, (LISTOP*)$3); | |
3280af22 | 140 | PL_pad_reset_pending = TRUE; |
500bedb6 | 141 | if ($1 && $3) PL_hints |= HINT_BLOCK_SCOPE; } |
8d063cd8 LW |
142 | ; |
143 | ||
891be019 | 144 | /* A "line" in the program */ |
79072805 LW |
145 | line : label cond |
146 | { $$ = newSTATEOP(0, $1, $2); } | |
8d063cd8 LW |
147 | | loop /* loops add their own labels */ |
148 | | label ';' | |
149 | { if ($1 != Nullch) { | |
79072805 | 150 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
450a55e4 LW |
151 | } |
152 | else { | |
79072805 | 153 | $$ = Nullop; |
3280af22 | 154 | PL_copline = NOLINE; |
32c2e4fb | 155 | } |
3280af22 | 156 | PL_expect = XSTATE; } |
8d063cd8 | 157 | | label sideff ';' |
79072805 | 158 | { $$ = newSTATEOP(0, $1, $2); |
3280af22 | 159 | PL_expect = XSTATE; } |
8d063cd8 LW |
160 | ; |
161 | ||
891be019 | 162 | /* An expression which may have a side-effect */ |
a687059c | 163 | sideff : error |
79072805 | 164 | { $$ = Nullop; } |
a687059c | 165 | | expr |
79072805 | 166 | { $$ = $1; } |
a687059c | 167 | | expr IF expr |
79072805 | 168 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 169 | | expr UNLESS expr |
79072805 | 170 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 171 | | expr WHILE expr |
8990e307 | 172 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 173 | | expr UNTIL iexpr |
174 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} | |
ecca16b0 | 175 | | expr FOR expr |
eb160463 | 176 | { $$ = newFOROP(0, Nullch, (line_t)$2, |
ecca16b0 | 177 | Nullop, $3, $1, Nullop); } |
79072805 LW |
178 | ; |
179 | ||
891be019 | 180 | /* else and elsif blocks */ |
79072805 LW |
181 | else : /* NULL */ |
182 | { $$ = Nullop; } | |
55497cff | 183 | | ELSE mblock |
38a230cb | 184 | { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); } |
55497cff | 185 | | ELSIF '(' mexpr ')' mblock else |
eb160463 | 186 | { PL_copline = (line_t)$1; |
2c15bef3 | 187 | $$ = newCONDOP(0, $3, scope($5), $6); |
3280af22 | 188 | PL_hints |= HINT_BLOCK_SCOPE; } |
79072805 LW |
189 | ; |
190 | ||
891be019 | 191 | /* Real conditional expressions */ |
55497cff | 192 | cond : IF '(' remember mexpr ')' mblock else |
eb160463 | 193 | { PL_copline = (line_t)$1; |
36477c24 | 194 | $$ = block_end($3, |
bbce6d69 | 195 | newCONDOP(0, $4, scope($6), $7)); } |
55497cff | 196 | | UNLESS '(' remember miexpr ')' mblock else |
eb160463 | 197 | { PL_copline = (line_t)$1; |
36477c24 | 198 | $$ = block_end($3, |
bbce6d69 | 199 | newCONDOP(0, $4, scope($6), $7)); } |
79072805 LW |
200 | ; |
201 | ||
891be019 | 202 | /* Continue blocks */ |
79072805 LW |
203 | cont : /* NULL */ |
204 | { $$ = Nullop; } | |
205 | | CONTINUE block | |
206 | { $$ = scope($2); } | |
207 | ; | |
208 | ||
891be019 | 209 | /* Loops: while, until, for, and a bare block */ |
55497cff | 210 | loop : label WHILE '(' remember mtexpr ')' mblock cont |
eb160463 | 211 | { PL_copline = (line_t)$2; |
36477c24 | 212 | $$ = block_end($4, |
55497cff | 213 | newSTATEOP(0, $1, |
bbce6d69 | 214 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 215 | $2, $5, $7, $8))); } |
55497cff | 216 | | label UNTIL '(' remember miexpr ')' mblock cont |
eb160463 | 217 | { PL_copline = (line_t)$2; |
36477c24 | 218 | $$ = block_end($4, |
55497cff | 219 | newSTATEOP(0, $1, |
bbce6d69 | 220 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 221 | $2, $5, $7, $8))); } |
bbce6d69 | 222 | | label FOR MY remember my_scalar '(' mexpr ')' mblock cont |
36477c24 | 223 | { $$ = block_end($4, |
eb160463 | 224 | newFOROP(0, $1, (line_t)$2, $5, $7, $9, $10)); } |
bbce6d69 | 225 | | label FOR scalar '(' remember mexpr ')' mblock cont |
36477c24 | 226 | { $$ = block_end($5, |
eb160463 | 227 | newFOROP(0, $1, (line_t)$2, mod($3, OP_ENTERLOOP), |
bbce6d69 | 228 | $6, $8, $9)); } |
229 | | label FOR '(' remember mexpr ')' mblock cont | |
36477c24 | 230 | { $$ = block_end($4, |
eb160463 | 231 | newFOROP(0, $1, (line_t)$2, Nullop, $5, $7, $8)); } |
bbce6d69 | 232 | | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock |
8d063cd8 | 233 | /* basically fake up an initialize-while lineseq */ |
36c66720 | 234 | { OP *forop; |
eb160463 | 235 | PL_copline = (line_t)$2; |
36c66720 RH |
236 | forop = newSTATEOP(0, $1, |
237 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
238 | $2, scalar($7), | |
239 | $11, $9)); | |
240 | if ($5) { | |
241 | forop = append_elem(OP_LINESEQ, | |
242 | newSTATEOP(0, ($1?savepv($1):Nullch), | |
243 | $5), | |
244 | forop); | |
245 | } | |
246 | ||
247 | $$ = block_end($4, forop); } | |
79072805 | 248 | | label block cont /* a block is a loop that happens once */ |
fb73857a | 249 | { $$ = newSTATEOP(0, $1, |
250 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
251 | NOLINE, Nullop, $2, $3)); } | |
8d063cd8 LW |
252 | ; |
253 | ||
891be019 | 254 | /* Normal expression */ |
8d063cd8 | 255 | nexpr : /* NULL */ |
79072805 | 256 | { $$ = Nullop; } |
8d063cd8 LW |
257 | | sideff |
258 | ; | |
259 | ||
891be019 | 260 | /* Boolean expression */ |
8d063cd8 | 261 | texpr : /* NULL means true */ |
b73d6f50 | 262 | { (void)scan_num("1", &yylval); $$ = yylval.opval; } |
8d063cd8 LW |
263 | | expr |
264 | ; | |
265 | ||
891be019 | 266 | /* Inverted boolean expression */ |
55497cff | 267 | iexpr : expr |
268 | { $$ = invert(scalar($1)); } | |
269 | ; | |
270 | ||
891be019 | 271 | /* Expression with its own lexical scope */ |
55497cff | 272 | mexpr : expr |
bbce6d69 | 273 | { $$ = $1; intro_my(); } |
274 | ; | |
275 | ||
276 | mnexpr : nexpr | |
277 | { $$ = $1; intro_my(); } | |
55497cff | 278 | ; |
279 | ||
280 | mtexpr : texpr | |
bbce6d69 | 281 | { $$ = $1; intro_my(); } |
55497cff | 282 | ; |
283 | ||
284 | miexpr : iexpr | |
bbce6d69 | 285 | { $$ = $1; intro_my(); } |
55497cff | 286 | ; |
287 | ||
891be019 | 288 | /* Optional "MAIN:"-style loop labels */ |
8d063cd8 LW |
289 | label : /* empty */ |
290 | { $$ = Nullch; } | |
32c2e4fb | 291 | | LABEL |
8d063cd8 LW |
292 | ; |
293 | ||
891be019 | 294 | /* Some kind of declaration - does not take part in the parse tree */ |
8d063cd8 LW |
295 | decl : format |
296 | { $$ = 0; } | |
297 | | subrout | |
298 | { $$ = 0; } | |
09bef843 SB |
299 | | mysubrout |
300 | { $$ = 0; } | |
a687059c LW |
301 | | package |
302 | { $$ = 0; } | |
a0d0e21e | 303 | | use |
85e6fe83 | 304 | { $$ = 0; } |
8d063cd8 LW |
305 | ; |
306 | ||
44a8e56a | 307 | format : FORMAT startformsub formname block |
a0d0e21e | 308 | { newFORM($2, $3, $4); } |
44a8e56a | 309 | ; |
310 | ||
311 | formname: WORD { $$ = $1; } | |
312 | | /* NULL */ { $$ = Nullop; } | |
8d063cd8 LW |
313 | ; |
314 | ||
891be019 | 315 | /* Unimplemented "my sub foo { }" */ |
09bef843 SB |
316 | mysubrout: MYSUB startsub subname proto subattrlist subbody |
317 | { newMYSUB($2, $3, $4, $5, $6); } | |
318 | ; | |
319 | ||
891be019 | 320 | /* Subroutine definition */ |
09bef843 SB |
321 | subrout : SUB startsub subname proto subattrlist subbody |
322 | { newATTRSUB($2, $3, $4, $5, $6); } | |
28757baa | 323 | ; |
324 | ||
fa83b5b6 | 325 | startsub: /* NULL */ /* start a regular subroutine scope */ |
774d564b | 326 | { $$ = start_subparse(FALSE, 0); } |
28757baa | 327 | ; |
328 | ||
329 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
774d564b | 330 | { $$ = start_subparse(FALSE, CVf_ANON); } |
28757baa | 331 | ; |
332 | ||
44a8e56a | 333 | startformsub: /* NULL */ /* start a format subroutine scope */ |
774d564b | 334 | { $$ = start_subparse(TRUE, 0); } |
44a8e56a | 335 | ; |
336 | ||
891be019 | 337 | /* Name of a subroutine - must be a bareword, could be special */ |
2d8e6c8d | 338 | subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); |
e858de61 | 339 | if (strEQ(name, "BEGIN") || strEQ(name, "END") |
7d30b5c4 | 340 | || strEQ(name, "INIT") || strEQ(name, "CHECK")) |
1aff0e91 | 341 | CvSPECIAL_on(PL_compcv); |
28757baa | 342 | $$ = $1; } |
a0d0e21e LW |
343 | ; |
344 | ||
891be019 | 345 | /* Subroutine prototype */ |
4633a7c4 LW |
346 | proto : /* NULL */ |
347 | { $$ = Nullop; } | |
348 | | THING | |
349 | ; | |
28757baa | 350 | |
891be019 | 351 | /* Optional list of subroutine attributes */ |
09bef843 SB |
352 | subattrlist: /* NULL */ |
353 | { $$ = Nullop; } | |
354 | | COLONATTR THING | |
355 | { $$ = $2; } | |
356 | | COLONATTR | |
357 | { $$ = Nullop; } | |
358 | ; | |
359 | ||
891be019 | 360 | /* List of attributes for a "my" variable declaration */ |
09bef843 SB |
361 | myattrlist: COLONATTR THING |
362 | { $$ = $2; } | |
363 | | COLONATTR | |
364 | { $$ = Nullop; } | |
365 | ; | |
366 | ||
891be019 | 367 | /* Subroutine body - either null or a block */ |
28757baa | 368 | subbody : block { $$ = $1; } |
3280af22 | 369 | | ';' { $$ = Nullop; PL_expect = XSTATE; } |
8d063cd8 LW |
370 | ; |
371 | ||
a687059c | 372 | package : PACKAGE WORD ';' |
79072805 | 373 | { package($2); } |
a687059c LW |
374 | ; |
375 | ||
28757baa | 376 | use : USE startsub |
1aff0e91 | 377 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } |
28757baa | 378 | WORD WORD listexpr ';' |
379 | { utilize($1, $2, $4, $5, $6); } | |
85e6fe83 LW |
380 | ; |
381 | ||
891be019 | 382 | /* Ordinary expressions; logical combinations */ |
a0d0e21e LW |
383 | expr : expr ANDOP expr |
384 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } | |
385 | | expr OROP expr | |
386 | { $$ = newLOGOP($2, 0, $1, $3); } | |
c963b151 BD |
387 | | expr DOROP expr |
388 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } | |
fad39ff1 | 389 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
390 | ; |
391 | ||
891be019 | 392 | /* Expressions are a list of terms joined by commas */ |
a0d0e21e LW |
393 | argexpr : argexpr ',' |
394 | { $$ = $1; } | |
395 | | argexpr ',' term | |
79072805 | 396 | { $$ = append_elem(OP_LIST, $1, $3); } |
fad39ff1 | 397 | | term %prec PREC_LOW |
8d063cd8 LW |
398 | ; |
399 | ||
891be019 SC |
400 | /* List operators */ |
401 | listop : LSTOP indirob argexpr /* print $fh @args */ | |
79072805 | 402 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 403 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
891be019 | 404 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
79072805 | 405 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 406 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
891be019 | 407 | | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ |
4633a7c4 | 408 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 409 | append_elem(OP_LIST, |
55497cff | 410 | prepend_elem(OP_LIST, scalar($1), $5), |
a0d0e21e | 411 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 | 412 | | term ARROW method /* $foo->bar */ |
b1524f17 SM |
413 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
414 | append_elem(OP_LIST, scalar($1), | |
415 | newUNOP(OP_METHOD, 0, $3))); } | |
891be019 | 416 | | METHOD indirob listexpr /* new Class @args */ |
4633a7c4 | 417 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 418 | append_elem(OP_LIST, |
4633a7c4 | 419 | prepend_elem(OP_LIST, $2, $3), |
a0d0e21e | 420 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 421 | | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ |
4633a7c4 | 422 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 423 | append_elem(OP_LIST, |
4633a7c4 | 424 | prepend_elem(OP_LIST, $2, $4), |
a0d0e21e | 425 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 426 | | LSTOP listexpr /* print @args */ |
79072805 | 427 | { $$ = convert($1, 0, $2); } |
891be019 | 428 | | FUNC '(' listexprcom ')' /* print (@args) */ |
79072805 | 429 | { $$ = convert($1, 0, $3); } |
ecb2f335 | 430 | | LSTOPSUB startanonsub block /* map { foo } ... */ |
09bef843 | 431 | { $3 = newANONATTRSUB($2, 0, Nullop, $3); } |
891be019 | 432 | listexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 433 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
28757baa | 434 | append_elem(OP_LIST, |
435 | prepend_elem(OP_LIST, $3, $5), $1)); } | |
a687059c LW |
436 | ; |
437 | ||
891be019 | 438 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
439 | method : METHOD |
440 | | scalar | |
441 | ; | |
442 | ||
891be019 SC |
443 | /* Some kind of subscripted expression */ |
444 | subscripted: star '{' expr ';' '}' /* *main::{something} */ | |
445 | /* In this and all the hash accessors, ';' is | |
446 | * provided by the tokeniser */ | |
264e1af3 RGS |
447 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); |
448 | PL_expect = XOPERATOR; } | |
891be019 | 449 | | scalar '[' expr ']' /* $array[$element] */ |
fad39ff1 | 450 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
891be019 | 451 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
452 | { $$ = newBINOP(OP_AELEM, 0, |
453 | ref(newAVREF($1),OP_RV2AV), | |
454 | scalar($4));} | |
891be019 | 455 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
456 | { $$ = newBINOP(OP_AELEM, 0, |
457 | ref(newAVREF($1),OP_RV2AV), | |
458 | scalar($3));} | |
891be019 | 459 | | scalar '{' expr ';' '}' /* $foo->{bar();} */ |
fad39ff1 SM |
460 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
461 | PL_expect = XOPERATOR; } | |
891be019 | 462 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
463 | { $$ = newBINOP(OP_HELEM, 0, |
464 | ref(newHVREF($1),OP_RV2HV), | |
465 | jmaybe($4)); | |
466 | PL_expect = XOPERATOR; } | |
891be019 | 467 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
468 | { $$ = newBINOP(OP_HELEM, 0, |
469 | ref(newHVREF($1),OP_RV2HV), | |
470 | jmaybe($3)); | |
471 | PL_expect = XOPERATOR; } | |
891be019 | 472 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 SM |
473 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
474 | newCVREF(0, scalar($1))); } | |
891be019 | 475 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 SM |
476 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
477 | append_elem(OP_LIST, $4, | |
478 | newCVREF(0, scalar($1)))); } | |
479 | ||
891be019 | 480 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 SM |
481 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
482 | append_elem(OP_LIST, $3, | |
483 | newCVREF(0, scalar($1)))); } | |
891be019 | 484 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 SM |
485 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
486 | newCVREF(0, scalar($1))); } | |
891be019 | 487 | ; |
fad39ff1 | 488 | |
891be019 SC |
489 | /* Binary operators between terms */ |
490 | termbinop : term ASSIGNOP term /* $x = $y */ | |
a0d0e21e | 491 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 492 | | term POWOP term /* $x ** $y */ |
79072805 | 493 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 494 | | term MULOP term /* $x * $y, $x x $y */ |
79072805 LW |
495 | { if ($2 != OP_REPEAT) |
496 | scalar($1); | |
497 | $$ = newBINOP($2, 0, $1, scalar($3)); } | |
891be019 | 498 | | term ADDOP term /* $x + $y */ |
79072805 | 499 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 500 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
79072805 | 501 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 502 | | term RELOP term /* $x > $y, etc. */ |
79072805 | 503 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 504 | | term EQOP term /* $x == $y, $x eq $y */ |
79072805 | 505 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 506 | | term BITANDOP term /* $x & $y */ |
79072805 | 507 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 508 | | term BITOROP term /* $x | $y */ |
79072805 | 509 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 510 | | term DOTDOT term /* $x..$y, $x...$y */ |
79072805 | 511 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
891be019 | 512 | | term ANDAND term /* $x && $y */ |
463ee0b2 | 513 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 514 | | term OROR term /* $x || $y */ |
463ee0b2 | 515 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 BD |
516 | | term DORDOR term /* $x // $y */ |
517 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } | |
891be019 | 518 | | term MATCHOP term /* $x =~ /$y/ */ |
79072805 | 519 | { $$ = bind_match($2, $1, $3); } |
891be019 | 520 | ; |
8d063cd8 | 521 | |
891be019 SC |
522 | /* Unary operators and terms */ |
523 | termunop : '-' term %prec UMINUS /* -$x */ | |
79072805 | 524 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 525 | | '+' term %prec UMINUS /* +$x */ |
a687059c | 526 | { $$ = $2; } |
891be019 | 527 | | '!' term /* !$x */ |
79072805 | 528 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 529 | | '~' term /* ~$x */ |
79072805 | 530 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
891be019 | 531 | | term POSTINC /* $x++ */ |
79072805 | 532 | { $$ = newUNOP(OP_POSTINC, 0, |
463ee0b2 | 533 | mod(scalar($1), OP_POSTINC)); } |
891be019 | 534 | | term POSTDEC /* $x-- */ |
79072805 | 535 | { $$ = newUNOP(OP_POSTDEC, 0, |
463ee0b2 | 536 | mod(scalar($1), OP_POSTDEC)); } |
891be019 | 537 | | PREINC term /* ++$x */ |
79072805 | 538 | { $$ = newUNOP(OP_PREINC, 0, |
463ee0b2 | 539 | mod(scalar($2), OP_PREINC)); } |
891be019 | 540 | | PREDEC term /* --$x */ |
79072805 | 541 | { $$ = newUNOP(OP_PREDEC, 0, |
463ee0b2 | 542 | mod(scalar($2), OP_PREDEC)); } |
891be019 SC |
543 | |
544 | ; | |
545 | ||
546 | /* Constructors for anonymous data */ | |
547 | anonymous: '[' expr ']' | |
548 | { $$ = newANONLIST($2); } | |
549 | | '[' ']' | |
550 | { $$ = newANONLIST(Nullop); } | |
551 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ | |
ecb2f335 | 552 | { $$ = newANONHASH($2); } |
891be019 SC |
553 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
554 | { $$ = newANONHASH(Nullop); } | |
555 | | ANONSUB startanonsub proto subattrlist block %prec '(' | |
556 | { $$ = newANONATTRSUB($2, $3, $4, $5); } | |
557 | ||
558 | ; | |
559 | ||
560 | /* Things called with "do" */ | |
561 | termdo : DO term %prec UNIOP /* do $filename */ | |
562 | { $$ = dofile($2); } | |
563 | | DO block %prec '(' /* do { code */ | |
564 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } | |
565 | | DO WORD '(' ')' /* do somesub() */ | |
566 | { $$ = newUNOP(OP_ENTERSUB, | |
567 | OPf_SPECIAL|OPf_STACKED, | |
568 | prepend_elem(OP_LIST, | |
569 | scalar(newCVREF( | |
570 | (OPpENTERSUB_AMPER<<8), | |
571 | scalar($2) | |
572 | )),Nullop)); dep();} | |
573 | | DO WORD '(' expr ')' /* do somesub(@args) */ | |
574 | { $$ = newUNOP(OP_ENTERSUB, | |
575 | OPf_SPECIAL|OPf_STACKED, | |
576 | append_elem(OP_LIST, | |
577 | $4, | |
578 | scalar(newCVREF( | |
579 | (OPpENTERSUB_AMPER<<8), | |
580 | scalar($2) | |
581 | )))); dep();} | |
582 | | DO scalar '(' ')' /* do $subref () */ | |
583 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
584 | prepend_elem(OP_LIST, | |
585 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} | |
586 | | DO scalar '(' expr ')' /* do $subref (@args) */ | |
587 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
588 | prepend_elem(OP_LIST, | |
589 | $4, | |
590 | scalar(newCVREF(0,scalar($2))))); dep();} | |
591 | ||
592 | ; | |
593 | ||
594 | term : termbinop | |
595 | | termunop | |
596 | | anonymous | |
597 | | termdo | |
e9bdcc27 | 598 | | term '?' term ':' term |
891be019 SC |
599 | { $$ = newCONDOP(0, $1, $3, $5); } |
600 | | REFGEN term /* \$x, \@y, \%z */ | |
601 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } | |
09bef843 SB |
602 | | myattrterm %prec UNIOP |
603 | { $$ = $1; } | |
604 | | LOCAL term %prec UNIOP | |
93a17b20 | 605 | { $$ = localize($2,$1); } |
a0d0e21e | 606 | | '(' expr ')' |
79072805 | 607 | { $$ = sawparens($2); } |
8d063cd8 | 608 | | '(' ')' |
8990e307 | 609 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 610 | | scalar %prec '(' |
8d063cd8 | 611 | { $$ = $1; } |
79072805 | 612 | | star %prec '(' |
8d063cd8 | 613 | { $$ = $1; } |
79072805 | 614 | | hsh %prec '(' |
8d063cd8 | 615 | { $$ = $1; } |
79072805 | 616 | | ary %prec '(' |
8d063cd8 | 617 | { $$ = $1; } |
891be019 | 618 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 619 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
620 | | subscripted |
621 | { $$ = $1; } | |
891be019 | 622 | | '(' expr ')' '[' expr ']' /* list slice */ |
79072805 | 623 | { $$ = newSLICEOP(0, $5, $2); } |
891be019 | 624 | | '(' ')' '[' expr ']' /* empty list slice! */ |
79072805 | 625 | { $$ = newSLICEOP(0, $4, Nullop); } |
891be019 | 626 | | ary '[' expr ']' /* array slice */ |
79072805 LW |
627 | { $$ = prepend_elem(OP_ASLICE, |
628 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
629 | newLISTOP(OP_ASLICE, 0, |
630 | list($3), | |
a0d0e21e | 631 | ref($1, OP_ASLICE))); } |
891be019 | 632 | | ary '{' expr ';' '}' /* @hash{@keys} */ |
79072805 LW |
633 | { $$ = prepend_elem(OP_HSLICE, |
634 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
635 | newLISTOP(OP_HSLICE, 0, |
636 | list($3), | |
a0d0e21e | 637 | ref(oopsHV($1), OP_HSLICE))); |
3280af22 | 638 | PL_expect = XOPERATOR; } |
79072805 LW |
639 | | THING %prec '(' |
640 | { $$ = $1; } | |
891be019 | 641 | | amper /* &foo; */ |
c07a80fd | 642 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
ecb2f335 | 643 | | amper '(' ')' /* &foo() */ |
a0d0e21e | 644 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 645 | | amper '(' expr ')' /* &foo(@args) */ |
a0d0e21e | 646 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 647 | append_elem(OP_LIST, $3, scalar($1))); } |
891be019 | 648 | | NOAMP WORD listexpr /* foo(@args) */ |
a0d0e21e | 649 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
a5f75d66 | 650 | append_elem(OP_LIST, $3, scalar($2))); } |
891be019 | 651 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
85e6fe83 | 652 | { $$ = newOP($1, OPf_SPECIAL); |
3280af22 | 653 | PL_hints |= HINT_BLOCK_SCOPE; } |
a0d0e21e | 654 | | LOOPEX term |
8990e307 | 655 | { $$ = newLOOPEX($1,$2); } |
891be019 | 656 | | NOTOP argexpr /* not $foo */ |
c07a80fd | 657 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 658 | | UNIOP /* Unary op, $_ implied */ |
79072805 | 659 | { $$ = newOP($1, 0); } |
30173ab5 | 660 | | UNIOP block /* eval { foo } */ |
79072805 | 661 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 662 | | UNIOP term /* Unary op */ |
79072805 | 663 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 664 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 LW |
665 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
666 | append_elem(OP_LIST, $2, scalar($1))); } | |
891be019 | 667 | | FUNC0 /* Nullary operator */ |
79072805 | 668 | { $$ = newOP($1, 0); } |
ae986130 | 669 | | FUNC0 '(' ')' |
79072805 | 670 | { $$ = newOP($1, 0); } |
891be019 | 671 | | FUNC0SUB /* Sub treated as nullop */ |
28757baa | 672 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 673 | scalar($1)); } |
891be019 | 674 | | FUNC1 '(' ')' /* not () */ |
79072805 | 675 | { $$ = newOP($1, OPf_SPECIAL); } |
891be019 | 676 | | FUNC1 '(' expr ')' /* not($foo) */ |
79072805 | 677 | { $$ = newUNOP($1, 0, $3); } |
131b3ad0 DM |
678 | | PMFUNC '(' argexpr ')' /* m//, s///, tr/// */ |
679 | { $$ = pmruntime($1, $3, 1); } | |
79072805 | 680 | | WORD |
378cc40b | 681 | | listop |
8d063cd8 LW |
682 | ; |
683 | ||
891be019 | 684 | /* "my" declarations, with optional attributes */ |
09bef843 SB |
685 | myattrterm: MY myterm myattrlist |
686 | { $$ = my_attrs($2,$3); } | |
687 | | MY myterm | |
688 | { $$ = localize($2,$1); } | |
689 | ; | |
690 | ||
891be019 | 691 | /* Things that can be "my"'d */ |
09bef843 SB |
692 | myterm : '(' expr ')' |
693 | { $$ = sawparens($2); } | |
694 | | '(' ')' | |
695 | { $$ = sawparens(newNULLLIST()); } | |
696 | | scalar %prec '(' | |
697 | { $$ = $1; } | |
698 | | hsh %prec '(' | |
699 | { $$ = $1; } | |
700 | | ary %prec '(' | |
701 | { $$ = $1; } | |
702 | ; | |
703 | ||
891be019 | 704 | /* Basic list expressions */ |
fad39ff1 | 705 | listexpr: /* NULL */ %prec PREC_LOW |
8990e307 | 706 | { $$ = Nullop; } |
fad39ff1 | 707 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
708 | { $$ = $1; } |
709 | ; | |
710 | ||
711 | listexprcom: /* NULL */ | |
712 | { $$ = Nullop; } | |
79072805 LW |
713 | | expr |
714 | { $$ = $1; } | |
a0d0e21e LW |
715 | | expr ',' |
716 | { $$ = $1; } | |
79072805 LW |
717 | ; |
718 | ||
891be019 SC |
719 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
720 | lexical */ | |
55497cff | 721 | my_scalar: scalar |
3280af22 | 722 | { PL_in_my = 0; $$ = my($1); } |
55497cff | 723 | ; |
724 | ||
79072805 | 725 | amper : '&' indirob |
c07a80fd | 726 | { $$ = newCVREF($1,$2); } |
a687059c LW |
727 | ; |
728 | ||
79072805 LW |
729 | scalar : '$' indirob |
730 | { $$ = newSVREF($2); } | |
a687059c LW |
731 | ; |
732 | ||
79072805 LW |
733 | ary : '@' indirob |
734 | { $$ = newAVREF($2); } | |
735 | ; | |
736 | ||
737 | hsh : '%' indirob | |
738 | { $$ = newHVREF($2); } | |
739 | ; | |
740 | ||
741 | arylen : DOLSHARP indirob | |
742 | { $$ = newAVREF($2); } | |
743 | ; | |
744 | ||
745 | star : '*' indirob | |
a0d0e21e | 746 | { $$ = newGVREF(0,$2); } |
79072805 LW |
747 | ; |
748 | ||
891be019 | 749 | /* Indirect objects */ |
79072805 LW |
750 | indirob : WORD |
751 | { $$ = scalar($1); } | |
fad39ff1 | 752 | | scalar %prec PREC_LOW |
463ee0b2 | 753 | { $$ = scalar($1); } |
79072805 | 754 | | block |
a0d0e21e | 755 | { $$ = scope($1); } |
79072805 | 756 | |
93a17b20 LW |
757 | | PRIVATEREF |
758 | { $$ = $1; } | |
8d063cd8 | 759 | ; |