Commit | Line | Data |
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a0d0e21e | 1 | /* perly.y |
a687059c | 2 | * |
59feff53 | 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 | ||
40d34c0d SB |
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. | |
21 | * It relies on the lexer in toke.c to do the tokenizing. | |
22 | */ | |
23 | ||
8d063cd8 | 24 | %{ |
79072805 | 25 | #include "EXTERN.h" |
864dbfa3 | 26 | #define PERL_IN_PERLY_C |
8d063cd8 | 27 | #include "perl.h" |
2ac72d6e | 28 | #ifdef EBCDIC |
1e0e26cb NIS |
29 | #undef YYDEBUG |
30 | #endif | |
864dbfa3 | 31 | #define dep() deprecate("\"do\" to call subroutines") |
f0fcb552 | 32 | |
09bef843 SB |
33 | /* stuff included here to make perly_c.diff apply better */ |
34 | ||
35 | #define yydebug PL_yydebug | |
36 | #define yynerrs PL_yynerrs | |
37 | #define yyerrflag PL_yyerrflag | |
38 | #define yychar PL_yychar | |
39 | #define yyval PL_yyval | |
40 | #define yylval PL_yylval | |
41 | ||
42 | struct ysv { | |
43 | short* yyss; | |
44 | YYSTYPE* yyvs; | |
45 | int oldyydebug; | |
46 | int oldyynerrs; | |
47 | int oldyyerrflag; | |
48 | int oldyychar; | |
49 | YYSTYPE oldyyval; | |
50 | YYSTYPE oldyylval; | |
51 | }; | |
52 | ||
acfe0abc | 53 | static void yydestruct(pTHX_ void *ptr); |
09bef843 | 54 | |
8d063cd8 LW |
55 | %} |
56 | ||
57 | %start prog | |
58 | ||
9d116dd7 | 59 | %{ |
09bef843 | 60 | #if 0 /* get this from perly.h instead */ |
9d116dd7 JH |
61 | %} |
62 | ||
8d063cd8 | 63 | %union { |
79072805 LW |
64 | I32 ival; |
65 | char *pval; | |
66 | OP *opval; | |
67 | GV *gvval; | |
8d063cd8 LW |
68 | } |
69 | ||
9d116dd7 | 70 | %{ |
09bef843 | 71 | #endif /* 0 */ |
a1a0e61e TD |
72 | |
73 | #ifdef USE_PURE_BISON | |
74 | #define YYLEX_PARAM (&yychar) | |
48cf72c8 | 75 | #define yylex yylex_r |
a1a0e61e | 76 | #endif |
09bef843 | 77 | |
9d116dd7 JH |
78 | %} |
79 | ||
fad39ff1 | 80 | %token <ival> '{' |
f0fcb552 | 81 | |
a0d0e21e | 82 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF |
4633a7c4 | 83 | %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB |
79072805 | 84 | %token <pval> LABEL |
a0d0e21e | 85 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE |
79072805 LW |
86 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR |
87 | %token <ival> LOOPEX DOTDOT | |
36477c24 | 88 | %token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP |
79072805 | 89 | %token <ival> RELOP EQOP MULOP ADDOP |
55497cff | 90 | %token <ival> DOLSHARP DO HASHBRACK NOAMP |
09bef843 SB |
91 | %token <ival> LOCAL MY MYSUB |
92 | %token COLONATTR | |
79072805 | 93 | |
09bef843 | 94 | %type <ival> prog decl format startsub startanonsub startformsub |
ecb2f335 | 95 | %type <ival> progstart remember mremember '&' |
bbce6d69 | 96 | %type <opval> block mblock lineseq line loop cond else |
fad39ff1 | 97 | %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff |
bbce6d69 | 98 | %type <opval> argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr |
44a8e56a | 99 | %type <opval> listexpr listexprcom indirob listop method |
100 | %type <opval> formname subname proto subbody cont my_scalar | |
09bef843 | 101 | %type <opval> subattrlist myattrlist mysubrout myattrterm myterm |
891be019 | 102 | %type <opval> termbinop termunop anonymous termdo |
79072805 | 103 | %type <pval> label |
79072805 | 104 | |
fad39ff1 SM |
105 | %nonassoc PREC_LOW |
106 | %nonassoc LOOPEX | |
107 | ||
a0d0e21e | 108 | %left <ival> OROP |
463ee0b2 | 109 | %left ANDOP |
c07a80fd | 110 | %right NOTOP |
36477c24 | 111 | %nonassoc LSTOP LSTOPSUB |
8d063cd8 | 112 | %left ',' |
a0d0e21e | 113 | %right <ival> ASSIGNOP |
8d063cd8 LW |
114 | %right '?' ':' |
115 | %nonassoc DOTDOT | |
116 | %left OROR | |
117 | %left ANDAND | |
79072805 LW |
118 | %left <ival> BITOROP |
119 | %left <ival> BITANDOP | |
a687059c LW |
120 | %nonassoc EQOP |
121 | %nonassoc RELOP | |
36477c24 | 122 | %nonassoc UNIOP UNIOPSUB |
79072805 | 123 | %left <ival> SHIFTOP |
a687059c LW |
124 | %left ADDOP |
125 | %left MULOP | |
8990e307 | 126 | %left <ival> MATCHOP |
79072805 LW |
127 | %right '!' '~' UMINUS REFGEN |
128 | %right <ival> POWOP | |
129 | %nonassoc PREINC PREDEC POSTINC POSTDEC | |
8990e307 | 130 | %left ARROW |
fad39ff1 | 131 | %nonassoc <ival> ')' |
8d063cd8 | 132 | %left '(' |
fad39ff1 | 133 | %left '[' '{' |
8d063cd8 LW |
134 | |
135 | %% /* RULES */ | |
136 | ||
891be019 | 137 | /* The whole program */ |
ecb2f335 | 138 | prog : progstart |
ae986130 | 139 | /*CONTINUED*/ lineseq |
ecb2f335 | 140 | { $$ = $1; newPROG(block_end($1,$2)); } |
8d063cd8 LW |
141 | ; |
142 | ||
891be019 | 143 | /* An ordinary block */ |
a687059c | 144 | block : '{' remember lineseq '}' |
3280af22 | 145 | { if (PL_copline > (line_t)$1) |
eb160463 | 146 | PL_copline = (line_t)$1; |
36477c24 | 147 | $$ = block_end($2, $3); } |
a0d0e21e LW |
148 | ; |
149 | ||
55497cff | 150 | remember: /* NULL */ /* start a full lexical scope */ |
151 | { $$ = block_start(TRUE); } | |
152 | ; | |
153 | ||
ecb2f335 NIS |
154 | progstart: |
155 | { | |
156 | #if defined(YYDEBUG) && defined(DEBUGGING) | |
157 | yydebug = (DEBUG_p_TEST); | |
158 | #endif | |
159 | PL_expect = XSTATE; $$ = block_start(TRUE); | |
160 | } | |
161 | ; | |
162 | ||
163 | ||
bbce6d69 | 164 | mblock : '{' mremember lineseq '}' |
3280af22 | 165 | { if (PL_copline > (line_t)$1) |
eb160463 | 166 | PL_copline = (line_t)$1; |
36477c24 | 167 | $$ = block_end($2, $3); } |
55497cff | 168 | ; |
169 | ||
170 | mremember: /* NULL */ /* start a partial lexical scope */ | |
171 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
172 | ; |
173 | ||
891be019 | 174 | /* A collection of "lines" in the program */ |
8d063cd8 | 175 | lineseq : /* NULL */ |
79072805 LW |
176 | { $$ = Nullop; } |
177 | | lineseq decl | |
178 | { $$ = $1; } | |
8d063cd8 | 179 | | lineseq line |
463ee0b2 | 180 | { $$ = append_list(OP_LINESEQ, |
a0d0e21e | 181 | (LISTOP*)$1, (LISTOP*)$2); |
3280af22 NIS |
182 | PL_pad_reset_pending = TRUE; |
183 | if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; } | |
8d063cd8 LW |
184 | ; |
185 | ||
891be019 | 186 | /* A "line" in the program */ |
79072805 LW |
187 | line : label cond |
188 | { $$ = newSTATEOP(0, $1, $2); } | |
8d063cd8 LW |
189 | | loop /* loops add their own labels */ |
190 | | label ';' | |
191 | { if ($1 != Nullch) { | |
79072805 | 192 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
450a55e4 LW |
193 | } |
194 | else { | |
79072805 | 195 | $$ = Nullop; |
3280af22 | 196 | PL_copline = NOLINE; |
32c2e4fb | 197 | } |
3280af22 | 198 | PL_expect = XSTATE; } |
8d063cd8 | 199 | | label sideff ';' |
79072805 | 200 | { $$ = newSTATEOP(0, $1, $2); |
3280af22 | 201 | PL_expect = XSTATE; } |
8d063cd8 LW |
202 | ; |
203 | ||
891be019 | 204 | /* An expression which may have a side-effect */ |
a687059c | 205 | sideff : error |
79072805 | 206 | { $$ = Nullop; } |
a687059c | 207 | | expr |
79072805 | 208 | { $$ = $1; } |
a687059c | 209 | | expr IF expr |
79072805 | 210 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 211 | | expr UNLESS expr |
79072805 | 212 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 213 | | expr WHILE expr |
8990e307 | 214 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 215 | | expr UNTIL iexpr |
216 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} | |
ecca16b0 | 217 | | expr FOR expr |
eb160463 | 218 | { $$ = newFOROP(0, Nullch, (line_t)$2, |
ecca16b0 | 219 | Nullop, $3, $1, Nullop); } |
79072805 LW |
220 | ; |
221 | ||
891be019 | 222 | /* else and elsif blocks */ |
79072805 LW |
223 | else : /* NULL */ |
224 | { $$ = Nullop; } | |
55497cff | 225 | | ELSE mblock |
38a230cb | 226 | { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); } |
55497cff | 227 | | ELSIF '(' mexpr ')' mblock else |
eb160463 | 228 | { PL_copline = (line_t)$1; |
2c15bef3 | 229 | $$ = newCONDOP(0, $3, scope($5), $6); |
3280af22 | 230 | PL_hints |= HINT_BLOCK_SCOPE; } |
79072805 LW |
231 | ; |
232 | ||
891be019 | 233 | /* Real conditional expressions */ |
55497cff | 234 | cond : IF '(' remember mexpr ')' mblock else |
eb160463 | 235 | { PL_copline = (line_t)$1; |
36477c24 | 236 | $$ = block_end($3, |
bbce6d69 | 237 | newCONDOP(0, $4, scope($6), $7)); } |
55497cff | 238 | | UNLESS '(' remember miexpr ')' mblock else |
eb160463 | 239 | { PL_copline = (line_t)$1; |
36477c24 | 240 | $$ = block_end($3, |
bbce6d69 | 241 | newCONDOP(0, $4, scope($6), $7)); } |
79072805 LW |
242 | ; |
243 | ||
891be019 | 244 | /* Continue blocks */ |
79072805 LW |
245 | cont : /* NULL */ |
246 | { $$ = Nullop; } | |
247 | | CONTINUE block | |
248 | { $$ = scope($2); } | |
249 | ; | |
250 | ||
891be019 | 251 | /* Loops: while, until, for, and a bare block */ |
55497cff | 252 | loop : label WHILE '(' remember mtexpr ')' mblock cont |
eb160463 | 253 | { PL_copline = (line_t)$2; |
36477c24 | 254 | $$ = block_end($4, |
55497cff | 255 | newSTATEOP(0, $1, |
bbce6d69 | 256 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 257 | $2, $5, $7, $8))); } |
55497cff | 258 | | label UNTIL '(' remember miexpr ')' mblock cont |
eb160463 | 259 | { PL_copline = (line_t)$2; |
36477c24 | 260 | $$ = block_end($4, |
55497cff | 261 | newSTATEOP(0, $1, |
bbce6d69 | 262 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 263 | $2, $5, $7, $8))); } |
bbce6d69 | 264 | | label FOR MY remember my_scalar '(' mexpr ')' mblock cont |
36477c24 | 265 | { $$ = block_end($4, |
eb160463 | 266 | newFOROP(0, $1, (line_t)$2, $5, $7, $9, $10)); } |
bbce6d69 | 267 | | label FOR scalar '(' remember mexpr ')' mblock cont |
36477c24 | 268 | { $$ = block_end($5, |
eb160463 | 269 | newFOROP(0, $1, (line_t)$2, mod($3, OP_ENTERLOOP), |
bbce6d69 | 270 | $6, $8, $9)); } |
271 | | label FOR '(' remember mexpr ')' mblock cont | |
36477c24 | 272 | { $$ = block_end($4, |
eb160463 | 273 | newFOROP(0, $1, (line_t)$2, Nullop, $5, $7, $8)); } |
bbce6d69 | 274 | | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock |
8d063cd8 | 275 | /* basically fake up an initialize-while lineseq */ |
36c66720 | 276 | { OP *forop; |
eb160463 | 277 | PL_copline = (line_t)$2; |
36c66720 RH |
278 | forop = newSTATEOP(0, $1, |
279 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
280 | $2, scalar($7), | |
281 | $11, $9)); | |
282 | if ($5) { | |
283 | forop = append_elem(OP_LINESEQ, | |
284 | newSTATEOP(0, ($1?savepv($1):Nullch), | |
285 | $5), | |
286 | forop); | |
287 | } | |
288 | ||
289 | $$ = block_end($4, forop); } | |
79072805 | 290 | | label block cont /* a block is a loop that happens once */ |
fb73857a | 291 | { $$ = newSTATEOP(0, $1, |
292 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
293 | NOLINE, Nullop, $2, $3)); } | |
8d063cd8 LW |
294 | ; |
295 | ||
891be019 | 296 | /* Normal expression */ |
8d063cd8 | 297 | nexpr : /* NULL */ |
79072805 | 298 | { $$ = Nullop; } |
8d063cd8 LW |
299 | | sideff |
300 | ; | |
301 | ||
891be019 | 302 | /* Boolean expression */ |
8d063cd8 | 303 | texpr : /* NULL means true */ |
b73d6f50 | 304 | { (void)scan_num("1", &yylval); $$ = yylval.opval; } |
8d063cd8 LW |
305 | | expr |
306 | ; | |
307 | ||
891be019 | 308 | /* Inverted boolean expression */ |
55497cff | 309 | iexpr : expr |
310 | { $$ = invert(scalar($1)); } | |
311 | ; | |
312 | ||
891be019 | 313 | /* Expression with its own lexical scope */ |
55497cff | 314 | mexpr : expr |
bbce6d69 | 315 | { $$ = $1; intro_my(); } |
316 | ; | |
317 | ||
318 | mnexpr : nexpr | |
319 | { $$ = $1; intro_my(); } | |
55497cff | 320 | ; |
321 | ||
322 | mtexpr : texpr | |
bbce6d69 | 323 | { $$ = $1; intro_my(); } |
55497cff | 324 | ; |
325 | ||
326 | miexpr : iexpr | |
bbce6d69 | 327 | { $$ = $1; intro_my(); } |
55497cff | 328 | ; |
329 | ||
891be019 | 330 | /* Optional "MAIN:"-style loop labels */ |
8d063cd8 LW |
331 | label : /* empty */ |
332 | { $$ = Nullch; } | |
32c2e4fb | 333 | | LABEL |
8d063cd8 LW |
334 | ; |
335 | ||
891be019 | 336 | /* Some kind of declaration - does not take part in the parse tree */ |
8d063cd8 LW |
337 | decl : format |
338 | { $$ = 0; } | |
339 | | subrout | |
340 | { $$ = 0; } | |
09bef843 SB |
341 | | mysubrout |
342 | { $$ = 0; } | |
a687059c LW |
343 | | package |
344 | { $$ = 0; } | |
a0d0e21e | 345 | | use |
85e6fe83 | 346 | { $$ = 0; } |
8d063cd8 LW |
347 | ; |
348 | ||
44a8e56a | 349 | format : FORMAT startformsub formname block |
a0d0e21e | 350 | { newFORM($2, $3, $4); } |
44a8e56a | 351 | ; |
352 | ||
353 | formname: WORD { $$ = $1; } | |
354 | | /* NULL */ { $$ = Nullop; } | |
8d063cd8 LW |
355 | ; |
356 | ||
891be019 | 357 | /* Unimplemented "my sub foo { }" */ |
09bef843 SB |
358 | mysubrout: MYSUB startsub subname proto subattrlist subbody |
359 | { newMYSUB($2, $3, $4, $5, $6); } | |
360 | ; | |
361 | ||
891be019 | 362 | /* Subroutine definition */ |
09bef843 SB |
363 | subrout : SUB startsub subname proto subattrlist subbody |
364 | { newATTRSUB($2, $3, $4, $5, $6); } | |
28757baa | 365 | ; |
366 | ||
fa83b5b6 | 367 | startsub: /* NULL */ /* start a regular subroutine scope */ |
774d564b | 368 | { $$ = start_subparse(FALSE, 0); } |
28757baa | 369 | ; |
370 | ||
371 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
774d564b | 372 | { $$ = start_subparse(FALSE, CVf_ANON); } |
28757baa | 373 | ; |
374 | ||
44a8e56a | 375 | startformsub: /* NULL */ /* start a format subroutine scope */ |
774d564b | 376 | { $$ = start_subparse(TRUE, 0); } |
44a8e56a | 377 | ; |
378 | ||
891be019 | 379 | /* Name of a subroutine - must be a bareword, could be special */ |
2d8e6c8d | 380 | subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); |
e858de61 | 381 | if (strEQ(name, "BEGIN") || strEQ(name, "END") |
7d30b5c4 | 382 | || strEQ(name, "INIT") || strEQ(name, "CHECK")) |
1aff0e91 | 383 | CvSPECIAL_on(PL_compcv); |
28757baa | 384 | $$ = $1; } |
a0d0e21e LW |
385 | ; |
386 | ||
891be019 | 387 | /* Subroutine prototype */ |
4633a7c4 LW |
388 | proto : /* NULL */ |
389 | { $$ = Nullop; } | |
390 | | THING | |
391 | ; | |
28757baa | 392 | |
891be019 | 393 | /* Optional list of subroutine attributes */ |
09bef843 SB |
394 | subattrlist: /* NULL */ |
395 | { $$ = Nullop; } | |
396 | | COLONATTR THING | |
397 | { $$ = $2; } | |
398 | | COLONATTR | |
399 | { $$ = Nullop; } | |
400 | ; | |
401 | ||
891be019 | 402 | /* List of attributes for a "my" variable declaration */ |
09bef843 SB |
403 | myattrlist: COLONATTR THING |
404 | { $$ = $2; } | |
405 | | COLONATTR | |
406 | { $$ = Nullop; } | |
407 | ; | |
408 | ||
891be019 | 409 | /* Subroutine body - either null or a block */ |
28757baa | 410 | subbody : block { $$ = $1; } |
3280af22 | 411 | | ';' { $$ = Nullop; PL_expect = XSTATE; } |
8d063cd8 LW |
412 | ; |
413 | ||
a687059c | 414 | package : PACKAGE WORD ';' |
79072805 | 415 | { package($2); } |
93a17b20 LW |
416 | | PACKAGE ';' |
417 | { package(Nullop); } | |
a687059c LW |
418 | ; |
419 | ||
28757baa | 420 | use : USE startsub |
1aff0e91 | 421 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } |
28757baa | 422 | WORD WORD listexpr ';' |
423 | { utilize($1, $2, $4, $5, $6); } | |
85e6fe83 LW |
424 | ; |
425 | ||
891be019 | 426 | /* Ordinary expressions; logical combinations */ |
a0d0e21e LW |
427 | expr : expr ANDOP expr |
428 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } | |
429 | | expr OROP expr | |
430 | { $$ = newLOGOP($2, 0, $1, $3); } | |
fad39ff1 | 431 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
432 | ; |
433 | ||
891be019 | 434 | /* Expressions are a list of terms joined by commas */ |
a0d0e21e LW |
435 | argexpr : argexpr ',' |
436 | { $$ = $1; } | |
437 | | argexpr ',' term | |
79072805 | 438 | { $$ = append_elem(OP_LIST, $1, $3); } |
fad39ff1 | 439 | | term %prec PREC_LOW |
8d063cd8 LW |
440 | ; |
441 | ||
891be019 | 442 | /* List operators */ |
922661e1 | 443 | listop : LSTOP indirob argexpr /* map {...} @args or print $fh @args */ |
79072805 | 444 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 445 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
891be019 | 446 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
79072805 | 447 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 448 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
891be019 | 449 | | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ |
4633a7c4 | 450 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 451 | append_elem(OP_LIST, |
55497cff | 452 | prepend_elem(OP_LIST, scalar($1), $5), |
a0d0e21e | 453 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 | 454 | | term ARROW method /* $foo->bar */ |
b1524f17 SM |
455 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
456 | append_elem(OP_LIST, scalar($1), | |
457 | newUNOP(OP_METHOD, 0, $3))); } | |
891be019 | 458 | | METHOD indirob listexpr /* new Class @args */ |
4633a7c4 | 459 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 460 | append_elem(OP_LIST, |
4633a7c4 | 461 | prepend_elem(OP_LIST, $2, $3), |
a0d0e21e | 462 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 463 | | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ |
4633a7c4 | 464 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 465 | append_elem(OP_LIST, |
4633a7c4 | 466 | prepend_elem(OP_LIST, $2, $4), |
a0d0e21e | 467 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 468 | | LSTOP listexpr /* print @args */ |
79072805 | 469 | { $$ = convert($1, 0, $2); } |
891be019 | 470 | | FUNC '(' listexprcom ')' /* print (@args) */ |
79072805 | 471 | { $$ = convert($1, 0, $3); } |
922661e1 | 472 | | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */ |
09bef843 | 473 | { $3 = newANONATTRSUB($2, 0, Nullop, $3); } |
891be019 | 474 | listexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 475 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
28757baa | 476 | append_elem(OP_LIST, |
477 | prepend_elem(OP_LIST, $3, $5), $1)); } | |
a687059c LW |
478 | ; |
479 | ||
891be019 | 480 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
481 | method : METHOD |
482 | | scalar | |
483 | ; | |
484 | ||
891be019 SC |
485 | /* Some kind of subscripted expression */ |
486 | subscripted: star '{' expr ';' '}' /* *main::{something} */ | |
487 | /* In this and all the hash accessors, ';' is | |
488 | * provided by the tokeniser */ | |
368fcb04 NC |
489 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); |
490 | PL_expect = XOPERATOR; } | |
891be019 | 491 | | scalar '[' expr ']' /* $array[$element] */ |
fad39ff1 | 492 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
891be019 | 493 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
494 | { $$ = newBINOP(OP_AELEM, 0, |
495 | ref(newAVREF($1),OP_RV2AV), | |
496 | scalar($4));} | |
891be019 | 497 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
498 | { $$ = newBINOP(OP_AELEM, 0, |
499 | ref(newAVREF($1),OP_RV2AV), | |
500 | scalar($3));} | |
891be019 | 501 | | scalar '{' expr ';' '}' /* $foo->{bar();} */ |
fad39ff1 SM |
502 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
503 | PL_expect = XOPERATOR; } | |
891be019 | 504 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
505 | { $$ = newBINOP(OP_HELEM, 0, |
506 | ref(newHVREF($1),OP_RV2HV), | |
507 | jmaybe($4)); | |
508 | PL_expect = XOPERATOR; } | |
891be019 | 509 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
510 | { $$ = newBINOP(OP_HELEM, 0, |
511 | ref(newHVREF($1),OP_RV2HV), | |
512 | jmaybe($3)); | |
513 | PL_expect = XOPERATOR; } | |
891be019 | 514 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 SM |
515 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
516 | newCVREF(0, scalar($1))); } | |
891be019 | 517 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 SM |
518 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
519 | append_elem(OP_LIST, $4, | |
520 | newCVREF(0, scalar($1)))); } | |
521 | ||
891be019 | 522 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 SM |
523 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
524 | append_elem(OP_LIST, $3, | |
525 | newCVREF(0, scalar($1)))); } | |
891be019 | 526 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 SM |
527 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
528 | newCVREF(0, scalar($1))); } | |
891be019 | 529 | ; |
fad39ff1 | 530 | |
891be019 SC |
531 | /* Binary operators between terms */ |
532 | termbinop : term ASSIGNOP term /* $x = $y */ | |
a0d0e21e | 533 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 534 | | term POWOP term /* $x ** $y */ |
79072805 | 535 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 536 | | term MULOP term /* $x * $y, $x x $y */ |
79072805 LW |
537 | { if ($2 != OP_REPEAT) |
538 | scalar($1); | |
539 | $$ = newBINOP($2, 0, $1, scalar($3)); } | |
891be019 | 540 | | term ADDOP term /* $x + $y */ |
79072805 | 541 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 542 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
79072805 | 543 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 544 | | term RELOP term /* $x > $y, etc. */ |
79072805 | 545 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 546 | | term EQOP term /* $x == $y, $x eq $y */ |
79072805 | 547 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 548 | | term BITANDOP term /* $x & $y */ |
79072805 | 549 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 550 | | term BITOROP term /* $x | $y */ |
79072805 | 551 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 552 | | term DOTDOT term /* $x..$y, $x...$y */ |
79072805 | 553 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
891be019 | 554 | | term ANDAND term /* $x && $y */ |
463ee0b2 | 555 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 556 | | term OROR term /* $x || $y */ |
463ee0b2 | 557 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
891be019 | 558 | | term MATCHOP term /* $x =~ /$y/ */ |
79072805 | 559 | { $$ = bind_match($2, $1, $3); } |
891be019 | 560 | ; |
8d063cd8 | 561 | |
891be019 SC |
562 | /* Unary operators and terms */ |
563 | termunop : '-' term %prec UMINUS /* -$x */ | |
79072805 | 564 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 565 | | '+' term %prec UMINUS /* +$x */ |
a687059c | 566 | { $$ = $2; } |
891be019 | 567 | | '!' term /* !$x */ |
79072805 | 568 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 569 | | '~' term /* ~$x */ |
79072805 | 570 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
891be019 | 571 | | term POSTINC /* $x++ */ |
79072805 | 572 | { $$ = newUNOP(OP_POSTINC, 0, |
463ee0b2 | 573 | mod(scalar($1), OP_POSTINC)); } |
891be019 | 574 | | term POSTDEC /* $x-- */ |
79072805 | 575 | { $$ = newUNOP(OP_POSTDEC, 0, |
463ee0b2 | 576 | mod(scalar($1), OP_POSTDEC)); } |
891be019 | 577 | | PREINC term /* ++$x */ |
79072805 | 578 | { $$ = newUNOP(OP_PREINC, 0, |
463ee0b2 | 579 | mod(scalar($2), OP_PREINC)); } |
891be019 | 580 | | PREDEC term /* --$x */ |
79072805 | 581 | { $$ = newUNOP(OP_PREDEC, 0, |
463ee0b2 | 582 | mod(scalar($2), OP_PREDEC)); } |
891be019 SC |
583 | |
584 | ; | |
585 | ||
586 | /* Constructors for anonymous data */ | |
587 | anonymous: '[' expr ']' | |
588 | { $$ = newANONLIST($2); } | |
589 | | '[' ']' | |
590 | { $$ = newANONLIST(Nullop); } | |
591 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ | |
ecb2f335 | 592 | { $$ = newANONHASH($2); } |
891be019 SC |
593 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
594 | { $$ = newANONHASH(Nullop); } | |
595 | | ANONSUB startanonsub proto subattrlist block %prec '(' | |
596 | { $$ = newANONATTRSUB($2, $3, $4, $5); } | |
597 | ||
598 | ; | |
599 | ||
600 | /* Things called with "do" */ | |
601 | termdo : DO term %prec UNIOP /* do $filename */ | |
602 | { $$ = dofile($2); } | |
603 | | DO block %prec '(' /* do { code */ | |
604 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } | |
605 | | DO WORD '(' ')' /* do somesub() */ | |
606 | { $$ = newUNOP(OP_ENTERSUB, | |
607 | OPf_SPECIAL|OPf_STACKED, | |
608 | prepend_elem(OP_LIST, | |
609 | scalar(newCVREF( | |
610 | (OPpENTERSUB_AMPER<<8), | |
611 | scalar($2) | |
612 | )),Nullop)); dep();} | |
613 | | DO WORD '(' expr ')' /* do somesub(@args) */ | |
614 | { $$ = newUNOP(OP_ENTERSUB, | |
615 | OPf_SPECIAL|OPf_STACKED, | |
616 | append_elem(OP_LIST, | |
617 | $4, | |
618 | scalar(newCVREF( | |
619 | (OPpENTERSUB_AMPER<<8), | |
620 | scalar($2) | |
621 | )))); dep();} | |
622 | | DO scalar '(' ')' /* do $subref () */ | |
623 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
624 | prepend_elem(OP_LIST, | |
625 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} | |
626 | | DO scalar '(' expr ')' /* do $subref (@args) */ | |
627 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
628 | prepend_elem(OP_LIST, | |
629 | $4, | |
630 | scalar(newCVREF(0,scalar($2))))); dep();} | |
631 | ||
632 | ; | |
633 | ||
634 | term : termbinop | |
635 | | termunop | |
636 | | anonymous | |
637 | | termdo | |
638 | | term '?' term ':' term | |
639 | { $$ = newCONDOP(0, $1, $3, $5); } | |
640 | | REFGEN term /* \$x, \@y, \%z */ | |
641 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } | |
09bef843 SB |
642 | | myattrterm %prec UNIOP |
643 | { $$ = $1; } | |
644 | | LOCAL term %prec UNIOP | |
93a17b20 | 645 | { $$ = localize($2,$1); } |
a0d0e21e | 646 | | '(' expr ')' |
79072805 | 647 | { $$ = sawparens($2); } |
8d063cd8 | 648 | | '(' ')' |
8990e307 | 649 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 650 | | scalar %prec '(' |
8d063cd8 | 651 | { $$ = $1; } |
79072805 | 652 | | star %prec '(' |
8d063cd8 | 653 | { $$ = $1; } |
79072805 | 654 | | hsh %prec '(' |
8d063cd8 | 655 | { $$ = $1; } |
79072805 | 656 | | ary %prec '(' |
8d063cd8 | 657 | { $$ = $1; } |
891be019 | 658 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 659 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
660 | | subscripted |
661 | { $$ = $1; } | |
891be019 | 662 | | '(' expr ')' '[' expr ']' /* list slice */ |
79072805 | 663 | { $$ = newSLICEOP(0, $5, $2); } |
891be019 | 664 | | '(' ')' '[' expr ']' /* empty list slice! */ |
79072805 | 665 | { $$ = newSLICEOP(0, $4, Nullop); } |
891be019 | 666 | | ary '[' expr ']' /* array slice */ |
79072805 LW |
667 | { $$ = prepend_elem(OP_ASLICE, |
668 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
669 | newLISTOP(OP_ASLICE, 0, |
670 | list($3), | |
a0d0e21e | 671 | ref($1, OP_ASLICE))); } |
891be019 | 672 | | ary '{' expr ';' '}' /* @hash{@keys} */ |
79072805 LW |
673 | { $$ = prepend_elem(OP_HSLICE, |
674 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
675 | newLISTOP(OP_HSLICE, 0, |
676 | list($3), | |
a0d0e21e | 677 | ref(oopsHV($1), OP_HSLICE))); |
3280af22 | 678 | PL_expect = XOPERATOR; } |
79072805 LW |
679 | | THING %prec '(' |
680 | { $$ = $1; } | |
891be019 | 681 | | amper /* &foo; */ |
c07a80fd | 682 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
ecb2f335 | 683 | | amper '(' ')' /* &foo() */ |
a0d0e21e | 684 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 685 | | amper '(' expr ')' /* &foo(@args) */ |
a0d0e21e | 686 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 687 | append_elem(OP_LIST, $3, scalar($1))); } |
891be019 | 688 | | NOAMP WORD listexpr /* foo(@args) */ |
a0d0e21e | 689 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
a5f75d66 | 690 | append_elem(OP_LIST, $3, scalar($2))); } |
891be019 | 691 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
85e6fe83 | 692 | { $$ = newOP($1, OPf_SPECIAL); |
3280af22 | 693 | PL_hints |= HINT_BLOCK_SCOPE; } |
a0d0e21e | 694 | | LOOPEX term |
8990e307 | 695 | { $$ = newLOOPEX($1,$2); } |
891be019 | 696 | | NOTOP argexpr /* not $foo */ |
c07a80fd | 697 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 698 | | UNIOP /* Unary op, $_ implied */ |
79072805 | 699 | { $$ = newOP($1, 0); } |
891be019 | 700 | | UNIOP block /* eval { foo }, I *think* */ |
79072805 | 701 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 702 | | UNIOP term /* Unary op */ |
79072805 | 703 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 704 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 LW |
705 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
706 | append_elem(OP_LIST, $2, scalar($1))); } | |
891be019 | 707 | | FUNC0 /* Nullary operator */ |
79072805 | 708 | { $$ = newOP($1, 0); } |
ae986130 | 709 | | FUNC0 '(' ')' |
79072805 | 710 | { $$ = newOP($1, 0); } |
891be019 | 711 | | FUNC0SUB /* Sub treated as nullop */ |
28757baa | 712 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 713 | scalar($1)); } |
891be019 | 714 | | FUNC1 '(' ')' /* not () */ |
88697ed3 SP |
715 | { $$ = $1 == OP_NOT ? newUNOP($1, 0, newSVOP(OP_CONST, 0, newSViv(0))) |
716 | : newOP($1, OPf_SPECIAL); } | |
891be019 | 717 | | FUNC1 '(' expr ')' /* not($foo) */ |
79072805 | 718 | { $$ = newUNOP($1, 0, $3); } |
891be019 | 719 | | PMFUNC '(' term ')' /* split (/foo/) */ |
79072805 | 720 | { $$ = pmruntime($1, $3, Nullop); } |
891be019 | 721 | | PMFUNC '(' term ',' term ')' /* split (/foo/,$bar) */ |
79072805 LW |
722 | { $$ = pmruntime($1, $3, $5); } |
723 | | WORD | |
378cc40b | 724 | | listop |
8d063cd8 LW |
725 | ; |
726 | ||
891be019 | 727 | /* "my" declarations, with optional attributes */ |
09bef843 SB |
728 | myattrterm: MY myterm myattrlist |
729 | { $$ = my_attrs($2,$3); } | |
730 | | MY myterm | |
731 | { $$ = localize($2,$1); } | |
732 | ; | |
733 | ||
891be019 | 734 | /* Things that can be "my"'d */ |
09bef843 SB |
735 | myterm : '(' expr ')' |
736 | { $$ = sawparens($2); } | |
737 | | '(' ')' | |
738 | { $$ = sawparens(newNULLLIST()); } | |
739 | | scalar %prec '(' | |
740 | { $$ = $1; } | |
741 | | hsh %prec '(' | |
742 | { $$ = $1; } | |
743 | | ary %prec '(' | |
744 | { $$ = $1; } | |
745 | ; | |
746 | ||
891be019 | 747 | /* Basic list expressions */ |
fad39ff1 | 748 | listexpr: /* NULL */ %prec PREC_LOW |
8990e307 | 749 | { $$ = Nullop; } |
fad39ff1 | 750 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
751 | { $$ = $1; } |
752 | ; | |
753 | ||
754 | listexprcom: /* NULL */ | |
755 | { $$ = Nullop; } | |
79072805 LW |
756 | | expr |
757 | { $$ = $1; } | |
a0d0e21e LW |
758 | | expr ',' |
759 | { $$ = $1; } | |
79072805 LW |
760 | ; |
761 | ||
891be019 SC |
762 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
763 | lexical */ | |
55497cff | 764 | my_scalar: scalar |
3280af22 | 765 | { PL_in_my = 0; $$ = my($1); } |
55497cff | 766 | ; |
767 | ||
79072805 | 768 | amper : '&' indirob |
c07a80fd | 769 | { $$ = newCVREF($1,$2); } |
a687059c LW |
770 | ; |
771 | ||
79072805 LW |
772 | scalar : '$' indirob |
773 | { $$ = newSVREF($2); } | |
a687059c LW |
774 | ; |
775 | ||
79072805 LW |
776 | ary : '@' indirob |
777 | { $$ = newAVREF($2); } | |
778 | ; | |
779 | ||
780 | hsh : '%' indirob | |
781 | { $$ = newHVREF($2); } | |
782 | ; | |
783 | ||
784 | arylen : DOLSHARP indirob | |
785 | { $$ = newAVREF($2); } | |
786 | ; | |
787 | ||
788 | star : '*' indirob | |
a0d0e21e | 789 | { $$ = newGVREF(0,$2); } |
79072805 LW |
790 | ; |
791 | ||
891be019 | 792 | /* Indirect objects */ |
79072805 LW |
793 | indirob : WORD |
794 | { $$ = scalar($1); } | |
fad39ff1 | 795 | | scalar %prec PREC_LOW |
463ee0b2 | 796 | { $$ = scalar($1); } |
79072805 | 797 | | block |
a0d0e21e | 798 | { $$ = scope($1); } |
79072805 | 799 | |
93a17b20 LW |
800 | | PRIVATEREF |
801 | { $$ = $1; } | |
8d063cd8 LW |
802 | ; |
803 | ||
804 | %% /* PROGRAM */ | |
09bef843 SB |
805 | |
806 | /* more stuff added to make perly_c.diff easier to apply */ | |
807 | ||
808 | #ifdef yyparse | |
809 | #undef yyparse | |
810 | #endif | |
811 | #define yyparse() Perl_yyparse(pTHX) | |
812 |