Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* perly.y |
a687059c | 2 | * |
be3c0a43 | 3 | * Copyright (c) 1991-2002, 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 | ||
15 | %{ | |
79072805 | 16 | #include "EXTERN.h" |
864dbfa3 | 17 | #define PERL_IN_PERLY_C |
8d063cd8 | 18 | #include "perl.h" |
2ac72d6e | 19 | #ifdef EBCDIC |
1e0e26cb NIS |
20 | #undef YYDEBUG |
21 | #endif | |
864dbfa3 | 22 | #define dep() deprecate("\"do\" to call subroutines") |
f0fcb552 | 23 | |
09bef843 SB |
24 | /* stuff included here to make perly_c.diff apply better */ |
25 | ||
26 | #define yydebug PL_yydebug | |
27 | #define yynerrs PL_yynerrs | |
28 | #define yyerrflag PL_yyerrflag | |
29 | #define yychar PL_yychar | |
30 | #define yyval PL_yyval | |
31 | #define yylval PL_yylval | |
32 | ||
33 | struct ysv { | |
34 | short* yyss; | |
35 | YYSTYPE* yyvs; | |
36 | int oldyydebug; | |
37 | int oldyynerrs; | |
38 | int oldyyerrflag; | |
39 | int oldyychar; | |
40 | YYSTYPE oldyyval; | |
41 | YYSTYPE oldyylval; | |
42 | }; | |
43 | ||
acfe0abc | 44 | static void yydestruct(pTHX_ void *ptr); |
09bef843 | 45 | |
8d063cd8 LW |
46 | %} |
47 | ||
48 | %start prog | |
49 | ||
9d116dd7 | 50 | %{ |
09bef843 | 51 | #if 0 /* get this from perly.h instead */ |
9d116dd7 JH |
52 | %} |
53 | ||
8d063cd8 | 54 | %union { |
79072805 LW |
55 | I32 ival; |
56 | char *pval; | |
57 | OP *opval; | |
58 | GV *gvval; | |
8d063cd8 LW |
59 | } |
60 | ||
9d116dd7 | 61 | %{ |
09bef843 | 62 | #endif /* 0 */ |
a1a0e61e TD |
63 | |
64 | #ifdef USE_PURE_BISON | |
65 | #define YYLEX_PARAM (&yychar) | |
48cf72c8 | 66 | #define yylex yylex_r |
a1a0e61e | 67 | #endif |
09bef843 | 68 | |
9d116dd7 JH |
69 | %} |
70 | ||
fad39ff1 | 71 | %token <ival> '{' |
f0fcb552 | 72 | |
a0d0e21e | 73 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF |
4633a7c4 | 74 | %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB |
79072805 | 75 | %token <pval> LABEL |
a0d0e21e | 76 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE |
79072805 LW |
77 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR |
78 | %token <ival> LOOPEX DOTDOT | |
36477c24 | 79 | %token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP |
79072805 | 80 | %token <ival> RELOP EQOP MULOP ADDOP |
55497cff | 81 | %token <ival> DOLSHARP DO HASHBRACK NOAMP |
09bef843 SB |
82 | %token <ival> LOCAL MY MYSUB |
83 | %token COLONATTR | |
79072805 | 84 | |
09bef843 | 85 | %type <ival> prog decl format startsub startanonsub startformsub |
ecb2f335 | 86 | %type <ival> progstart remember mremember '&' |
bbce6d69 | 87 | %type <opval> block mblock lineseq line loop cond else |
fad39ff1 | 88 | %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff |
bbce6d69 | 89 | %type <opval> argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr |
44a8e56a | 90 | %type <opval> listexpr listexprcom indirob listop method |
91 | %type <opval> formname subname proto subbody cont my_scalar | |
09bef843 | 92 | %type <opval> subattrlist myattrlist mysubrout myattrterm myterm |
891be019 | 93 | %type <opval> termbinop termunop anonymous termdo |
79072805 | 94 | %type <pval> label |
79072805 | 95 | |
fad39ff1 SM |
96 | %nonassoc PREC_LOW |
97 | %nonassoc LOOPEX | |
98 | ||
c963b151 | 99 | %left <ival> OROP DOROP |
463ee0b2 | 100 | %left ANDOP |
c07a80fd | 101 | %right NOTOP |
36477c24 | 102 | %nonassoc LSTOP LSTOPSUB |
8d063cd8 | 103 | %left ',' |
a0d0e21e | 104 | %right <ival> ASSIGNOP |
8d063cd8 LW |
105 | %right '?' ':' |
106 | %nonassoc DOTDOT | |
c963b151 | 107 | %left OROR DORDOR |
8d063cd8 | 108 | %left ANDAND |
79072805 LW |
109 | %left <ival> BITOROP |
110 | %left <ival> BITANDOP | |
a687059c LW |
111 | %nonassoc EQOP |
112 | %nonassoc RELOP | |
36477c24 | 113 | %nonassoc UNIOP UNIOPSUB |
79072805 | 114 | %left <ival> SHIFTOP |
a687059c LW |
115 | %left ADDOP |
116 | %left MULOP | |
8990e307 | 117 | %left <ival> MATCHOP |
79072805 LW |
118 | %right '!' '~' UMINUS REFGEN |
119 | %right <ival> POWOP | |
120 | %nonassoc PREINC PREDEC POSTINC POSTDEC | |
8990e307 | 121 | %left ARROW |
fad39ff1 | 122 | %nonassoc <ival> ')' |
8d063cd8 | 123 | %left '(' |
fad39ff1 | 124 | %left '[' '{' |
8d063cd8 LW |
125 | |
126 | %% /* RULES */ | |
127 | ||
891be019 | 128 | /* The whole program */ |
ecb2f335 | 129 | prog : progstart |
ae986130 | 130 | /*CONTINUED*/ lineseq |
ecb2f335 | 131 | { $$ = $1; newPROG(block_end($1,$2)); } |
8d063cd8 LW |
132 | ; |
133 | ||
891be019 | 134 | /* An ordinary block */ |
a687059c | 135 | block : '{' remember lineseq '}' |
3280af22 | 136 | { if (PL_copline > (line_t)$1) |
eb160463 | 137 | PL_copline = (line_t)$1; |
36477c24 | 138 | $$ = block_end($2, $3); } |
a0d0e21e LW |
139 | ; |
140 | ||
55497cff | 141 | remember: /* NULL */ /* start a full lexical scope */ |
142 | { $$ = block_start(TRUE); } | |
143 | ; | |
144 | ||
ecb2f335 NIS |
145 | progstart: |
146 | { | |
147 | #if defined(YYDEBUG) && defined(DEBUGGING) | |
148 | yydebug = (DEBUG_p_TEST); | |
149 | #endif | |
150 | PL_expect = XSTATE; $$ = block_start(TRUE); | |
151 | } | |
152 | ; | |
153 | ||
154 | ||
bbce6d69 | 155 | mblock : '{' mremember lineseq '}' |
3280af22 | 156 | { if (PL_copline > (line_t)$1) |
eb160463 | 157 | PL_copline = (line_t)$1; |
36477c24 | 158 | $$ = block_end($2, $3); } |
55497cff | 159 | ; |
160 | ||
161 | mremember: /* NULL */ /* start a partial lexical scope */ | |
162 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
163 | ; |
164 | ||
891be019 | 165 | /* A collection of "lines" in the program */ |
8d063cd8 | 166 | lineseq : /* NULL */ |
79072805 LW |
167 | { $$ = Nullop; } |
168 | | lineseq decl | |
169 | { $$ = $1; } | |
8d063cd8 | 170 | | lineseq line |
463ee0b2 | 171 | { $$ = append_list(OP_LINESEQ, |
a0d0e21e | 172 | (LISTOP*)$1, (LISTOP*)$2); |
3280af22 NIS |
173 | PL_pad_reset_pending = TRUE; |
174 | if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; } | |
8d063cd8 LW |
175 | ; |
176 | ||
891be019 | 177 | /* A "line" in the program */ |
79072805 LW |
178 | line : label cond |
179 | { $$ = newSTATEOP(0, $1, $2); } | |
8d063cd8 LW |
180 | | loop /* loops add their own labels */ |
181 | | label ';' | |
182 | { if ($1 != Nullch) { | |
79072805 | 183 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
450a55e4 LW |
184 | } |
185 | else { | |
79072805 | 186 | $$ = Nullop; |
3280af22 | 187 | PL_copline = NOLINE; |
32c2e4fb | 188 | } |
3280af22 | 189 | PL_expect = XSTATE; } |
8d063cd8 | 190 | | label sideff ';' |
79072805 | 191 | { $$ = newSTATEOP(0, $1, $2); |
3280af22 | 192 | PL_expect = XSTATE; } |
8d063cd8 LW |
193 | ; |
194 | ||
891be019 | 195 | /* An expression which may have a side-effect */ |
a687059c | 196 | sideff : error |
79072805 | 197 | { $$ = Nullop; } |
a687059c | 198 | | expr |
79072805 | 199 | { $$ = $1; } |
a687059c | 200 | | expr IF expr |
79072805 | 201 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 202 | | expr UNLESS expr |
79072805 | 203 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 204 | | expr WHILE expr |
8990e307 | 205 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 206 | | expr UNTIL iexpr |
207 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} | |
ecca16b0 | 208 | | expr FOR expr |
eb160463 | 209 | { $$ = newFOROP(0, Nullch, (line_t)$2, |
ecca16b0 | 210 | Nullop, $3, $1, Nullop); } |
79072805 LW |
211 | ; |
212 | ||
891be019 | 213 | /* else and elsif blocks */ |
79072805 LW |
214 | else : /* NULL */ |
215 | { $$ = Nullop; } | |
55497cff | 216 | | ELSE mblock |
38a230cb | 217 | { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); } |
55497cff | 218 | | ELSIF '(' mexpr ')' mblock else |
eb160463 | 219 | { PL_copline = (line_t)$1; |
2c15bef3 | 220 | $$ = newCONDOP(0, $3, scope($5), $6); |
3280af22 | 221 | PL_hints |= HINT_BLOCK_SCOPE; } |
79072805 LW |
222 | ; |
223 | ||
891be019 | 224 | /* Real conditional expressions */ |
55497cff | 225 | cond : IF '(' remember mexpr ')' mblock else |
eb160463 | 226 | { PL_copline = (line_t)$1; |
36477c24 | 227 | $$ = block_end($3, |
bbce6d69 | 228 | newCONDOP(0, $4, scope($6), $7)); } |
55497cff | 229 | | UNLESS '(' remember miexpr ')' mblock else |
eb160463 | 230 | { PL_copline = (line_t)$1; |
36477c24 | 231 | $$ = block_end($3, |
bbce6d69 | 232 | newCONDOP(0, $4, scope($6), $7)); } |
79072805 LW |
233 | ; |
234 | ||
891be019 | 235 | /* Continue blocks */ |
79072805 LW |
236 | cont : /* NULL */ |
237 | { $$ = Nullop; } | |
238 | | CONTINUE block | |
239 | { $$ = scope($2); } | |
240 | ; | |
241 | ||
891be019 | 242 | /* Loops: while, until, for, and a bare block */ |
55497cff | 243 | loop : label WHILE '(' remember mtexpr ')' mblock cont |
eb160463 | 244 | { PL_copline = (line_t)$2; |
36477c24 | 245 | $$ = block_end($4, |
55497cff | 246 | newSTATEOP(0, $1, |
bbce6d69 | 247 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 248 | $2, $5, $7, $8))); } |
55497cff | 249 | | label UNTIL '(' remember miexpr ')' mblock cont |
eb160463 | 250 | { PL_copline = (line_t)$2; |
36477c24 | 251 | $$ = block_end($4, |
55497cff | 252 | newSTATEOP(0, $1, |
bbce6d69 | 253 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 254 | $2, $5, $7, $8))); } |
bbce6d69 | 255 | | label FOR MY remember my_scalar '(' mexpr ')' mblock cont |
36477c24 | 256 | { $$ = block_end($4, |
eb160463 | 257 | newFOROP(0, $1, (line_t)$2, $5, $7, $9, $10)); } |
bbce6d69 | 258 | | label FOR scalar '(' remember mexpr ')' mblock cont |
36477c24 | 259 | { $$ = block_end($5, |
eb160463 | 260 | newFOROP(0, $1, (line_t)$2, mod($3, OP_ENTERLOOP), |
bbce6d69 | 261 | $6, $8, $9)); } |
262 | | label FOR '(' remember mexpr ')' mblock cont | |
36477c24 | 263 | { $$ = block_end($4, |
eb160463 | 264 | newFOROP(0, $1, (line_t)$2, Nullop, $5, $7, $8)); } |
bbce6d69 | 265 | | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock |
8d063cd8 | 266 | /* basically fake up an initialize-while lineseq */ |
36c66720 | 267 | { OP *forop; |
eb160463 | 268 | PL_copline = (line_t)$2; |
36c66720 RH |
269 | forop = newSTATEOP(0, $1, |
270 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
271 | $2, scalar($7), | |
272 | $11, $9)); | |
273 | if ($5) { | |
274 | forop = append_elem(OP_LINESEQ, | |
275 | newSTATEOP(0, ($1?savepv($1):Nullch), | |
276 | $5), | |
277 | forop); | |
278 | } | |
279 | ||
280 | $$ = block_end($4, forop); } | |
79072805 | 281 | | label block cont /* a block is a loop that happens once */ |
fb73857a | 282 | { $$ = newSTATEOP(0, $1, |
283 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
284 | NOLINE, Nullop, $2, $3)); } | |
8d063cd8 LW |
285 | ; |
286 | ||
891be019 | 287 | /* Normal expression */ |
8d063cd8 | 288 | nexpr : /* NULL */ |
79072805 | 289 | { $$ = Nullop; } |
8d063cd8 LW |
290 | | sideff |
291 | ; | |
292 | ||
891be019 | 293 | /* Boolean expression */ |
8d063cd8 | 294 | texpr : /* NULL means true */ |
b73d6f50 | 295 | { (void)scan_num("1", &yylval); $$ = yylval.opval; } |
8d063cd8 LW |
296 | | expr |
297 | ; | |
298 | ||
891be019 | 299 | /* Inverted boolean expression */ |
55497cff | 300 | iexpr : expr |
301 | { $$ = invert(scalar($1)); } | |
302 | ; | |
303 | ||
891be019 | 304 | /* Expression with its own lexical scope */ |
55497cff | 305 | mexpr : expr |
bbce6d69 | 306 | { $$ = $1; intro_my(); } |
307 | ; | |
308 | ||
309 | mnexpr : nexpr | |
310 | { $$ = $1; intro_my(); } | |
55497cff | 311 | ; |
312 | ||
313 | mtexpr : texpr | |
bbce6d69 | 314 | { $$ = $1; intro_my(); } |
55497cff | 315 | ; |
316 | ||
317 | miexpr : iexpr | |
bbce6d69 | 318 | { $$ = $1; intro_my(); } |
55497cff | 319 | ; |
320 | ||
891be019 | 321 | /* Optional "MAIN:"-style loop labels */ |
8d063cd8 LW |
322 | label : /* empty */ |
323 | { $$ = Nullch; } | |
32c2e4fb | 324 | | LABEL |
8d063cd8 LW |
325 | ; |
326 | ||
891be019 | 327 | /* Some kind of declaration - does not take part in the parse tree */ |
8d063cd8 LW |
328 | decl : format |
329 | { $$ = 0; } | |
330 | | subrout | |
331 | { $$ = 0; } | |
09bef843 SB |
332 | | mysubrout |
333 | { $$ = 0; } | |
a687059c LW |
334 | | package |
335 | { $$ = 0; } | |
a0d0e21e | 336 | | use |
85e6fe83 | 337 | { $$ = 0; } |
8d063cd8 LW |
338 | ; |
339 | ||
44a8e56a | 340 | format : FORMAT startformsub formname block |
a0d0e21e | 341 | { newFORM($2, $3, $4); } |
44a8e56a | 342 | ; |
343 | ||
344 | formname: WORD { $$ = $1; } | |
345 | | /* NULL */ { $$ = Nullop; } | |
8d063cd8 LW |
346 | ; |
347 | ||
891be019 | 348 | /* Unimplemented "my sub foo { }" */ |
09bef843 SB |
349 | mysubrout: MYSUB startsub subname proto subattrlist subbody |
350 | { newMYSUB($2, $3, $4, $5, $6); } | |
351 | ; | |
352 | ||
891be019 | 353 | /* Subroutine definition */ |
09bef843 SB |
354 | subrout : SUB startsub subname proto subattrlist subbody |
355 | { newATTRSUB($2, $3, $4, $5, $6); } | |
28757baa | 356 | ; |
357 | ||
fa83b5b6 | 358 | startsub: /* NULL */ /* start a regular subroutine scope */ |
774d564b | 359 | { $$ = start_subparse(FALSE, 0); } |
28757baa | 360 | ; |
361 | ||
362 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
774d564b | 363 | { $$ = start_subparse(FALSE, CVf_ANON); } |
28757baa | 364 | ; |
365 | ||
44a8e56a | 366 | startformsub: /* NULL */ /* start a format subroutine scope */ |
774d564b | 367 | { $$ = start_subparse(TRUE, 0); } |
44a8e56a | 368 | ; |
369 | ||
891be019 | 370 | /* Name of a subroutine - must be a bareword, could be special */ |
2d8e6c8d | 371 | subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); |
e858de61 | 372 | if (strEQ(name, "BEGIN") || strEQ(name, "END") |
7d30b5c4 | 373 | || strEQ(name, "INIT") || strEQ(name, "CHECK")) |
1aff0e91 | 374 | CvSPECIAL_on(PL_compcv); |
28757baa | 375 | $$ = $1; } |
a0d0e21e LW |
376 | ; |
377 | ||
891be019 | 378 | /* Subroutine prototype */ |
4633a7c4 LW |
379 | proto : /* NULL */ |
380 | { $$ = Nullop; } | |
381 | | THING | |
382 | ; | |
28757baa | 383 | |
891be019 | 384 | /* Optional list of subroutine attributes */ |
09bef843 SB |
385 | subattrlist: /* NULL */ |
386 | { $$ = Nullop; } | |
387 | | COLONATTR THING | |
388 | { $$ = $2; } | |
389 | | COLONATTR | |
390 | { $$ = Nullop; } | |
391 | ; | |
392 | ||
891be019 | 393 | /* List of attributes for a "my" variable declaration */ |
09bef843 SB |
394 | myattrlist: COLONATTR THING |
395 | { $$ = $2; } | |
396 | | COLONATTR | |
397 | { $$ = Nullop; } | |
398 | ; | |
399 | ||
891be019 | 400 | /* Subroutine body - either null or a block */ |
28757baa | 401 | subbody : block { $$ = $1; } |
3280af22 | 402 | | ';' { $$ = Nullop; PL_expect = XSTATE; } |
8d063cd8 LW |
403 | ; |
404 | ||
a687059c | 405 | package : PACKAGE WORD ';' |
79072805 | 406 | { package($2); } |
a687059c LW |
407 | ; |
408 | ||
28757baa | 409 | use : USE startsub |
1aff0e91 | 410 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } |
28757baa | 411 | WORD WORD listexpr ';' |
412 | { utilize($1, $2, $4, $5, $6); } | |
85e6fe83 LW |
413 | ; |
414 | ||
891be019 | 415 | /* Ordinary expressions; logical combinations */ |
a0d0e21e LW |
416 | expr : expr ANDOP expr |
417 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } | |
418 | | expr OROP expr | |
419 | { $$ = newLOGOP($2, 0, $1, $3); } | |
c963b151 BD |
420 | | expr DOROP expr |
421 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } | |
fad39ff1 | 422 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
423 | ; |
424 | ||
891be019 | 425 | /* Expressions are a list of terms joined by commas */ |
a0d0e21e LW |
426 | argexpr : argexpr ',' |
427 | { $$ = $1; } | |
428 | | argexpr ',' term | |
79072805 | 429 | { $$ = append_elem(OP_LIST, $1, $3); } |
fad39ff1 | 430 | | term %prec PREC_LOW |
8d063cd8 LW |
431 | ; |
432 | ||
891be019 SC |
433 | /* List operators */ |
434 | listop : LSTOP indirob argexpr /* print $fh @args */ | |
79072805 | 435 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 436 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
891be019 | 437 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
79072805 | 438 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 439 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
891be019 | 440 | | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ |
4633a7c4 | 441 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 442 | append_elem(OP_LIST, |
55497cff | 443 | prepend_elem(OP_LIST, scalar($1), $5), |
a0d0e21e | 444 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 | 445 | | term ARROW method /* $foo->bar */ |
b1524f17 SM |
446 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
447 | append_elem(OP_LIST, scalar($1), | |
448 | newUNOP(OP_METHOD, 0, $3))); } | |
891be019 | 449 | | METHOD indirob listexpr /* new Class @args */ |
4633a7c4 | 450 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 451 | append_elem(OP_LIST, |
4633a7c4 | 452 | prepend_elem(OP_LIST, $2, $3), |
a0d0e21e | 453 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 454 | | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ |
4633a7c4 | 455 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 456 | append_elem(OP_LIST, |
4633a7c4 | 457 | prepend_elem(OP_LIST, $2, $4), |
a0d0e21e | 458 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 459 | | LSTOP listexpr /* print @args */ |
79072805 | 460 | { $$ = convert($1, 0, $2); } |
891be019 | 461 | | FUNC '(' listexprcom ')' /* print (@args) */ |
79072805 | 462 | { $$ = convert($1, 0, $3); } |
ecb2f335 | 463 | | LSTOPSUB startanonsub block /* map { foo } ... */ |
09bef843 | 464 | { $3 = newANONATTRSUB($2, 0, Nullop, $3); } |
891be019 | 465 | listexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 466 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
28757baa | 467 | append_elem(OP_LIST, |
468 | prepend_elem(OP_LIST, $3, $5), $1)); } | |
a687059c LW |
469 | ; |
470 | ||
891be019 | 471 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
472 | method : METHOD |
473 | | scalar | |
474 | ; | |
475 | ||
891be019 SC |
476 | /* Some kind of subscripted expression */ |
477 | subscripted: star '{' expr ';' '}' /* *main::{something} */ | |
478 | /* In this and all the hash accessors, ';' is | |
479 | * provided by the tokeniser */ | |
fad39ff1 | 480 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } |
891be019 | 481 | | scalar '[' expr ']' /* $array[$element] */ |
fad39ff1 | 482 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
891be019 | 483 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
484 | { $$ = newBINOP(OP_AELEM, 0, |
485 | ref(newAVREF($1),OP_RV2AV), | |
486 | scalar($4));} | |
891be019 | 487 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
488 | { $$ = newBINOP(OP_AELEM, 0, |
489 | ref(newAVREF($1),OP_RV2AV), | |
490 | scalar($3));} | |
891be019 | 491 | | scalar '{' expr ';' '}' /* $foo->{bar();} */ |
fad39ff1 SM |
492 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
493 | PL_expect = XOPERATOR; } | |
891be019 | 494 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
495 | { $$ = newBINOP(OP_HELEM, 0, |
496 | ref(newHVREF($1),OP_RV2HV), | |
497 | jmaybe($4)); | |
498 | PL_expect = XOPERATOR; } | |
891be019 | 499 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
500 | { $$ = newBINOP(OP_HELEM, 0, |
501 | ref(newHVREF($1),OP_RV2HV), | |
502 | jmaybe($3)); | |
503 | PL_expect = XOPERATOR; } | |
891be019 | 504 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 SM |
505 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
506 | newCVREF(0, scalar($1))); } | |
891be019 | 507 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 SM |
508 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
509 | append_elem(OP_LIST, $4, | |
510 | newCVREF(0, scalar($1)))); } | |
511 | ||
891be019 | 512 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 SM |
513 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
514 | append_elem(OP_LIST, $3, | |
515 | newCVREF(0, scalar($1)))); } | |
891be019 | 516 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 SM |
517 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
518 | newCVREF(0, scalar($1))); } | |
891be019 | 519 | ; |
fad39ff1 | 520 | |
891be019 SC |
521 | /* Binary operators between terms */ |
522 | termbinop : term ASSIGNOP term /* $x = $y */ | |
a0d0e21e | 523 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 524 | | term POWOP term /* $x ** $y */ |
79072805 | 525 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 526 | | term MULOP term /* $x * $y, $x x $y */ |
79072805 LW |
527 | { if ($2 != OP_REPEAT) |
528 | scalar($1); | |
529 | $$ = newBINOP($2, 0, $1, scalar($3)); } | |
891be019 | 530 | | term ADDOP term /* $x + $y */ |
79072805 | 531 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 532 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
79072805 | 533 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 534 | | term RELOP term /* $x > $y, etc. */ |
79072805 | 535 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 536 | | term EQOP term /* $x == $y, $x eq $y */ |
79072805 | 537 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 538 | | term BITANDOP term /* $x & $y */ |
79072805 | 539 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 540 | | term BITOROP term /* $x | $y */ |
79072805 | 541 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 542 | | term DOTDOT term /* $x..$y, $x...$y */ |
79072805 | 543 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
891be019 | 544 | | term ANDAND term /* $x && $y */ |
463ee0b2 | 545 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 546 | | term OROR term /* $x || $y */ |
463ee0b2 | 547 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 BD |
548 | | term DORDOR term /* $x // $y */ |
549 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } | |
891be019 | 550 | | term MATCHOP term /* $x =~ /$y/ */ |
79072805 | 551 | { $$ = bind_match($2, $1, $3); } |
891be019 | 552 | ; |
8d063cd8 | 553 | |
891be019 SC |
554 | /* Unary operators and terms */ |
555 | termunop : '-' term %prec UMINUS /* -$x */ | |
79072805 | 556 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 557 | | '+' term %prec UMINUS /* +$x */ |
a687059c | 558 | { $$ = $2; } |
891be019 | 559 | | '!' term /* !$x */ |
79072805 | 560 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 561 | | '~' term /* ~$x */ |
79072805 | 562 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
891be019 | 563 | | term POSTINC /* $x++ */ |
79072805 | 564 | { $$ = newUNOP(OP_POSTINC, 0, |
463ee0b2 | 565 | mod(scalar($1), OP_POSTINC)); } |
891be019 | 566 | | term POSTDEC /* $x-- */ |
79072805 | 567 | { $$ = newUNOP(OP_POSTDEC, 0, |
463ee0b2 | 568 | mod(scalar($1), OP_POSTDEC)); } |
891be019 | 569 | | PREINC term /* ++$x */ |
79072805 | 570 | { $$ = newUNOP(OP_PREINC, 0, |
463ee0b2 | 571 | mod(scalar($2), OP_PREINC)); } |
891be019 | 572 | | PREDEC term /* --$x */ |
79072805 | 573 | { $$ = newUNOP(OP_PREDEC, 0, |
463ee0b2 | 574 | mod(scalar($2), OP_PREDEC)); } |
891be019 SC |
575 | |
576 | ; | |
577 | ||
578 | /* Constructors for anonymous data */ | |
579 | anonymous: '[' expr ']' | |
580 | { $$ = newANONLIST($2); } | |
581 | | '[' ']' | |
582 | { $$ = newANONLIST(Nullop); } | |
583 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ | |
ecb2f335 | 584 | { $$ = newANONHASH($2); } |
891be019 SC |
585 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
586 | { $$ = newANONHASH(Nullop); } | |
587 | | ANONSUB startanonsub proto subattrlist block %prec '(' | |
588 | { $$ = newANONATTRSUB($2, $3, $4, $5); } | |
589 | ||
590 | ; | |
591 | ||
592 | /* Things called with "do" */ | |
593 | termdo : DO term %prec UNIOP /* do $filename */ | |
594 | { $$ = dofile($2); } | |
595 | | DO block %prec '(' /* do { code */ | |
596 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } | |
597 | | DO WORD '(' ')' /* do somesub() */ | |
598 | { $$ = newUNOP(OP_ENTERSUB, | |
599 | OPf_SPECIAL|OPf_STACKED, | |
600 | prepend_elem(OP_LIST, | |
601 | scalar(newCVREF( | |
602 | (OPpENTERSUB_AMPER<<8), | |
603 | scalar($2) | |
604 | )),Nullop)); dep();} | |
605 | | DO WORD '(' expr ')' /* do somesub(@args) */ | |
606 | { $$ = newUNOP(OP_ENTERSUB, | |
607 | OPf_SPECIAL|OPf_STACKED, | |
608 | append_elem(OP_LIST, | |
609 | $4, | |
610 | scalar(newCVREF( | |
611 | (OPpENTERSUB_AMPER<<8), | |
612 | scalar($2) | |
613 | )))); dep();} | |
614 | | DO scalar '(' ')' /* do $subref () */ | |
615 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
616 | prepend_elem(OP_LIST, | |
617 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} | |
618 | | DO scalar '(' expr ')' /* do $subref (@args) */ | |
619 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
620 | prepend_elem(OP_LIST, | |
621 | $4, | |
622 | scalar(newCVREF(0,scalar($2))))); dep();} | |
623 | ||
624 | ; | |
625 | ||
626 | term : termbinop | |
627 | | termunop | |
628 | | anonymous | |
629 | | termdo | |
630 | | term '?' term ':' term | |
631 | { $$ = newCONDOP(0, $1, $3, $5); } | |
632 | | REFGEN term /* \$x, \@y, \%z */ | |
633 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } | |
09bef843 SB |
634 | | myattrterm %prec UNIOP |
635 | { $$ = $1; } | |
636 | | LOCAL term %prec UNIOP | |
93a17b20 | 637 | { $$ = localize($2,$1); } |
a0d0e21e | 638 | | '(' expr ')' |
79072805 | 639 | { $$ = sawparens($2); } |
8d063cd8 | 640 | | '(' ')' |
8990e307 | 641 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 642 | | scalar %prec '(' |
8d063cd8 | 643 | { $$ = $1; } |
79072805 | 644 | | star %prec '(' |
8d063cd8 | 645 | { $$ = $1; } |
79072805 | 646 | | hsh %prec '(' |
8d063cd8 | 647 | { $$ = $1; } |
79072805 | 648 | | ary %prec '(' |
8d063cd8 | 649 | { $$ = $1; } |
891be019 | 650 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 651 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
652 | | subscripted |
653 | { $$ = $1; } | |
891be019 | 654 | | '(' expr ')' '[' expr ']' /* list slice */ |
79072805 | 655 | { $$ = newSLICEOP(0, $5, $2); } |
891be019 | 656 | | '(' ')' '[' expr ']' /* empty list slice! */ |
79072805 | 657 | { $$ = newSLICEOP(0, $4, Nullop); } |
891be019 | 658 | | ary '[' expr ']' /* array slice */ |
79072805 LW |
659 | { $$ = prepend_elem(OP_ASLICE, |
660 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
661 | newLISTOP(OP_ASLICE, 0, |
662 | list($3), | |
a0d0e21e | 663 | ref($1, OP_ASLICE))); } |
891be019 | 664 | | ary '{' expr ';' '}' /* @hash{@keys} */ |
79072805 LW |
665 | { $$ = prepend_elem(OP_HSLICE, |
666 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
667 | newLISTOP(OP_HSLICE, 0, |
668 | list($3), | |
a0d0e21e | 669 | ref(oopsHV($1), OP_HSLICE))); |
3280af22 | 670 | PL_expect = XOPERATOR; } |
79072805 LW |
671 | | THING %prec '(' |
672 | { $$ = $1; } | |
891be019 | 673 | | amper /* &foo; */ |
c07a80fd | 674 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
ecb2f335 | 675 | | amper '(' ')' /* &foo() */ |
a0d0e21e | 676 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 677 | | amper '(' expr ')' /* &foo(@args) */ |
a0d0e21e | 678 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 679 | append_elem(OP_LIST, $3, scalar($1))); } |
891be019 | 680 | | NOAMP WORD listexpr /* foo(@args) */ |
a0d0e21e | 681 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
a5f75d66 | 682 | append_elem(OP_LIST, $3, scalar($2))); } |
891be019 | 683 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
85e6fe83 | 684 | { $$ = newOP($1, OPf_SPECIAL); |
3280af22 | 685 | PL_hints |= HINT_BLOCK_SCOPE; } |
a0d0e21e | 686 | | LOOPEX term |
8990e307 | 687 | { $$ = newLOOPEX($1,$2); } |
891be019 | 688 | | NOTOP argexpr /* not $foo */ |
c07a80fd | 689 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 690 | | UNIOP /* Unary op, $_ implied */ |
79072805 | 691 | { $$ = newOP($1, 0); } |
891be019 | 692 | | UNIOP block /* eval { foo }, I *think* */ |
79072805 | 693 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 694 | | UNIOP term /* Unary op */ |
79072805 | 695 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 696 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 LW |
697 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
698 | append_elem(OP_LIST, $2, scalar($1))); } | |
891be019 | 699 | | FUNC0 /* Nullary operator */ |
79072805 | 700 | { $$ = newOP($1, 0); } |
ae986130 | 701 | | FUNC0 '(' ')' |
79072805 | 702 | { $$ = newOP($1, 0); } |
891be019 | 703 | | FUNC0SUB /* Sub treated as nullop */ |
28757baa | 704 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 705 | scalar($1)); } |
891be019 | 706 | | FUNC1 '(' ')' /* not () */ |
79072805 | 707 | { $$ = newOP($1, OPf_SPECIAL); } |
891be019 | 708 | | FUNC1 '(' expr ')' /* not($foo) */ |
79072805 | 709 | { $$ = newUNOP($1, 0, $3); } |
891be019 | 710 | | PMFUNC '(' term ')' /* split (/foo/) */ |
79072805 | 711 | { $$ = pmruntime($1, $3, Nullop); } |
891be019 | 712 | | PMFUNC '(' term ',' term ')' /* split (/foo/,$bar) */ |
79072805 LW |
713 | { $$ = pmruntime($1, $3, $5); } |
714 | | WORD | |
378cc40b | 715 | | listop |
8d063cd8 LW |
716 | ; |
717 | ||
891be019 | 718 | /* "my" declarations, with optional attributes */ |
09bef843 SB |
719 | myattrterm: MY myterm myattrlist |
720 | { $$ = my_attrs($2,$3); } | |
721 | | MY myterm | |
722 | { $$ = localize($2,$1); } | |
723 | ; | |
724 | ||
891be019 | 725 | /* Things that can be "my"'d */ |
09bef843 SB |
726 | myterm : '(' expr ')' |
727 | { $$ = sawparens($2); } | |
728 | | '(' ')' | |
729 | { $$ = sawparens(newNULLLIST()); } | |
730 | | scalar %prec '(' | |
731 | { $$ = $1; } | |
732 | | hsh %prec '(' | |
733 | { $$ = $1; } | |
734 | | ary %prec '(' | |
735 | { $$ = $1; } | |
736 | ; | |
737 | ||
891be019 | 738 | /* Basic list expressions */ |
fad39ff1 | 739 | listexpr: /* NULL */ %prec PREC_LOW |
8990e307 | 740 | { $$ = Nullop; } |
fad39ff1 | 741 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
742 | { $$ = $1; } |
743 | ; | |
744 | ||
745 | listexprcom: /* NULL */ | |
746 | { $$ = Nullop; } | |
79072805 LW |
747 | | expr |
748 | { $$ = $1; } | |
a0d0e21e LW |
749 | | expr ',' |
750 | { $$ = $1; } | |
79072805 LW |
751 | ; |
752 | ||
891be019 SC |
753 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
754 | lexical */ | |
55497cff | 755 | my_scalar: scalar |
3280af22 | 756 | { PL_in_my = 0; $$ = my($1); } |
55497cff | 757 | ; |
758 | ||
79072805 | 759 | amper : '&' indirob |
c07a80fd | 760 | { $$ = newCVREF($1,$2); } |
a687059c LW |
761 | ; |
762 | ||
79072805 LW |
763 | scalar : '$' indirob |
764 | { $$ = newSVREF($2); } | |
a687059c LW |
765 | ; |
766 | ||
79072805 LW |
767 | ary : '@' indirob |
768 | { $$ = newAVREF($2); } | |
769 | ; | |
770 | ||
771 | hsh : '%' indirob | |
772 | { $$ = newHVREF($2); } | |
773 | ; | |
774 | ||
775 | arylen : DOLSHARP indirob | |
776 | { $$ = newAVREF($2); } | |
777 | ; | |
778 | ||
779 | star : '*' indirob | |
a0d0e21e | 780 | { $$ = newGVREF(0,$2); } |
79072805 LW |
781 | ; |
782 | ||
891be019 | 783 | /* Indirect objects */ |
79072805 LW |
784 | indirob : WORD |
785 | { $$ = scalar($1); } | |
fad39ff1 | 786 | | scalar %prec PREC_LOW |
463ee0b2 | 787 | { $$ = scalar($1); } |
79072805 | 788 | | block |
a0d0e21e | 789 | { $$ = scope($1); } |
79072805 | 790 | |
93a17b20 LW |
791 | | PRIVATEREF |
792 | { $$ = $1; } | |
8d063cd8 LW |
793 | ; |
794 | ||
795 | %% /* PROGRAM */ | |
09bef843 SB |
796 | |
797 | /* more stuff added to make perly_c.diff easier to apply */ | |
798 | ||
799 | #ifdef yyparse | |
800 | #undef yyparse | |
801 | #endif | |
802 | #define yyparse() Perl_yyparse(pTHX) | |
803 |