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