Commit | Line | Data |
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a0d0e21e | 1 | /* perly.y |
a687059c | 2 | * |
bc89e66f | 3 | * Copyright (c) 1991-2001, 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" |
1e0e26cb NIS |
19 | #ifdef EBCDIC |
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 | ||
e1f15930 | 44 | static void yydestruct(pTHXo_ 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 |
28757baa | 86 | %type <ival> 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 | ||
a0d0e21e | 99 | %left <ival> OROP |
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 | |
107 | %left OROR | |
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 */ |
ae986130 LW |
129 | prog : /* NULL */ |
130 | { | |
131 | #if defined(YYDEBUG) && defined(DEBUGGING) | |
aea4f609 | 132 | yydebug = (DEBUG_p_TEST); |
ae986130 | 133 | #endif |
c71fccf1 | 134 | PL_expect = XSTATE; $$ = block_start(TRUE); |
ae986130 LW |
135 | } |
136 | /*CONTINUED*/ lineseq | |
c71fccf1 | 137 | { newPROG(block_end($1,$2)); } |
8d063cd8 LW |
138 | ; |
139 | ||
891be019 | 140 | /* An ordinary block */ |
a687059c | 141 | block : '{' remember lineseq '}' |
3280af22 NIS |
142 | { if (PL_copline > (line_t)$1) |
143 | PL_copline = $1; | |
36477c24 | 144 | $$ = block_end($2, $3); } |
a0d0e21e LW |
145 | ; |
146 | ||
55497cff | 147 | remember: /* NULL */ /* start a full lexical scope */ |
148 | { $$ = block_start(TRUE); } | |
149 | ; | |
150 | ||
bbce6d69 | 151 | mblock : '{' mremember lineseq '}' |
3280af22 NIS |
152 | { if (PL_copline > (line_t)$1) |
153 | PL_copline = $1; | |
36477c24 | 154 | $$ = block_end($2, $3); } |
55497cff | 155 | ; |
156 | ||
157 | mremember: /* NULL */ /* start a partial lexical scope */ | |
158 | { $$ = block_start(FALSE); } | |
8d063cd8 LW |
159 | ; |
160 | ||
891be019 | 161 | /* A collection of "lines" in the program */ |
8d063cd8 | 162 | lineseq : /* NULL */ |
79072805 LW |
163 | { $$ = Nullop; } |
164 | | lineseq decl | |
165 | { $$ = $1; } | |
8d063cd8 | 166 | | lineseq line |
463ee0b2 | 167 | { $$ = append_list(OP_LINESEQ, |
a0d0e21e | 168 | (LISTOP*)$1, (LISTOP*)$2); |
3280af22 NIS |
169 | PL_pad_reset_pending = TRUE; |
170 | if ($1 && $2) PL_hints |= HINT_BLOCK_SCOPE; } | |
8d063cd8 LW |
171 | ; |
172 | ||
891be019 | 173 | /* A "line" in the program */ |
79072805 LW |
174 | line : label cond |
175 | { $$ = newSTATEOP(0, $1, $2); } | |
8d063cd8 LW |
176 | | loop /* loops add their own labels */ |
177 | | label ';' | |
178 | { if ($1 != Nullch) { | |
79072805 | 179 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
450a55e4 LW |
180 | } |
181 | else { | |
79072805 | 182 | $$ = Nullop; |
3280af22 | 183 | PL_copline = NOLINE; |
32c2e4fb | 184 | } |
3280af22 | 185 | PL_expect = XSTATE; } |
8d063cd8 | 186 | | label sideff ';' |
79072805 | 187 | { $$ = newSTATEOP(0, $1, $2); |
3280af22 | 188 | PL_expect = XSTATE; } |
8d063cd8 LW |
189 | ; |
190 | ||
891be019 | 191 | /* An expression which may have a side-effect */ |
a687059c | 192 | sideff : error |
79072805 | 193 | { $$ = Nullop; } |
a687059c | 194 | | expr |
79072805 | 195 | { $$ = $1; } |
a687059c | 196 | | expr IF expr |
79072805 | 197 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
a687059c | 198 | | expr UNLESS expr |
79072805 | 199 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
a687059c | 200 | | expr WHILE expr |
8990e307 | 201 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
55497cff | 202 | | expr UNTIL iexpr |
203 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} | |
ecca16b0 CS |
204 | | expr FOR expr |
205 | { $$ = newFOROP(0, Nullch, $2, | |
206 | Nullop, $3, $1, Nullop); } | |
79072805 LW |
207 | ; |
208 | ||
891be019 | 209 | /* else and elsif blocks */ |
79072805 LW |
210 | else : /* NULL */ |
211 | { $$ = Nullop; } | |
55497cff | 212 | | ELSE mblock |
38a230cb | 213 | { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); } |
55497cff | 214 | | ELSIF '(' mexpr ')' mblock else |
3280af22 | 215 | { PL_copline = $1; |
2c15bef3 | 216 | $$ = newCONDOP(0, $3, scope($5), $6); |
3280af22 | 217 | PL_hints |= HINT_BLOCK_SCOPE; } |
79072805 LW |
218 | ; |
219 | ||
891be019 | 220 | /* Real conditional expressions */ |
55497cff | 221 | cond : IF '(' remember mexpr ')' mblock else |
3280af22 | 222 | { PL_copline = $1; |
36477c24 | 223 | $$ = block_end($3, |
bbce6d69 | 224 | newCONDOP(0, $4, scope($6), $7)); } |
55497cff | 225 | | UNLESS '(' remember miexpr ')' mblock else |
3280af22 | 226 | { PL_copline = $1; |
36477c24 | 227 | $$ = block_end($3, |
bbce6d69 | 228 | newCONDOP(0, $4, scope($6), $7)); } |
79072805 LW |
229 | ; |
230 | ||
891be019 | 231 | /* Continue blocks */ |
79072805 LW |
232 | cont : /* NULL */ |
233 | { $$ = Nullop; } | |
234 | | CONTINUE block | |
235 | { $$ = scope($2); } | |
236 | ; | |
237 | ||
891be019 | 238 | /* Loops: while, until, for, and a bare block */ |
55497cff | 239 | loop : label WHILE '(' remember mtexpr ')' mblock cont |
3280af22 | 240 | { PL_copline = $2; |
36477c24 | 241 | $$ = block_end($4, |
55497cff | 242 | newSTATEOP(0, $1, |
bbce6d69 | 243 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 244 | $2, $5, $7, $8))); } |
55497cff | 245 | | label UNTIL '(' remember miexpr ')' mblock cont |
3280af22 | 246 | { PL_copline = $2; |
36477c24 | 247 | $$ = block_end($4, |
55497cff | 248 | newSTATEOP(0, $1, |
bbce6d69 | 249 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a | 250 | $2, $5, $7, $8))); } |
bbce6d69 | 251 | | label FOR MY remember my_scalar '(' mexpr ')' mblock cont |
36477c24 | 252 | { $$ = block_end($4, |
bbce6d69 | 253 | newFOROP(0, $1, $2, $5, $7, $9, $10)); } |
254 | | label FOR scalar '(' remember mexpr ')' mblock cont | |
36477c24 | 255 | { $$ = block_end($5, |
bbce6d69 | 256 | newFOROP(0, $1, $2, mod($3, OP_ENTERLOOP), |
257 | $6, $8, $9)); } | |
258 | | label FOR '(' remember mexpr ')' mblock cont | |
36477c24 | 259 | { $$ = block_end($4, |
55497cff | 260 | newFOROP(0, $1, $2, Nullop, $5, $7, $8)); } |
bbce6d69 | 261 | | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock |
8d063cd8 | 262 | /* basically fake up an initialize-while lineseq */ |
36c66720 | 263 | { OP *forop; |
3280af22 | 264 | PL_copline = $2; |
36c66720 RH |
265 | forop = newSTATEOP(0, $1, |
266 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
267 | $2, scalar($7), | |
268 | $11, $9)); | |
269 | if ($5) { | |
270 | forop = append_elem(OP_LINESEQ, | |
271 | newSTATEOP(0, ($1?savepv($1):Nullch), | |
272 | $5), | |
273 | forop); | |
274 | } | |
275 | ||
276 | $$ = block_end($4, forop); } | |
79072805 | 277 | | label block cont /* a block is a loop that happens once */ |
fb73857a | 278 | { $$ = newSTATEOP(0, $1, |
279 | newWHILEOP(0, 1, (LOOP*)Nullop, | |
280 | NOLINE, Nullop, $2, $3)); } | |
8d063cd8 LW |
281 | ; |
282 | ||
891be019 | 283 | /* Normal expression */ |
8d063cd8 | 284 | nexpr : /* NULL */ |
79072805 | 285 | { $$ = Nullop; } |
8d063cd8 LW |
286 | | sideff |
287 | ; | |
288 | ||
891be019 | 289 | /* Boolean expression */ |
8d063cd8 | 290 | texpr : /* NULL means true */ |
b73d6f50 | 291 | { (void)scan_num("1", &yylval); $$ = yylval.opval; } |
8d063cd8 LW |
292 | | expr |
293 | ; | |
294 | ||
891be019 | 295 | /* Inverted boolean expression */ |
55497cff | 296 | iexpr : expr |
297 | { $$ = invert(scalar($1)); } | |
298 | ; | |
299 | ||
891be019 | 300 | /* Expression with its own lexical scope */ |
55497cff | 301 | mexpr : expr |
bbce6d69 | 302 | { $$ = $1; intro_my(); } |
303 | ; | |
304 | ||
305 | mnexpr : nexpr | |
306 | { $$ = $1; intro_my(); } | |
55497cff | 307 | ; |
308 | ||
309 | mtexpr : texpr | |
bbce6d69 | 310 | { $$ = $1; intro_my(); } |
55497cff | 311 | ; |
312 | ||
313 | miexpr : iexpr | |
bbce6d69 | 314 | { $$ = $1; intro_my(); } |
55497cff | 315 | ; |
316 | ||
891be019 | 317 | /* Optional "MAIN:"-style loop labels */ |
8d063cd8 LW |
318 | label : /* empty */ |
319 | { $$ = Nullch; } | |
32c2e4fb | 320 | | LABEL |
8d063cd8 LW |
321 | ; |
322 | ||
891be019 | 323 | /* Some kind of declaration - does not take part in the parse tree */ |
8d063cd8 LW |
324 | decl : format |
325 | { $$ = 0; } | |
326 | | subrout | |
327 | { $$ = 0; } | |
09bef843 SB |
328 | | mysubrout |
329 | { $$ = 0; } | |
a687059c LW |
330 | | package |
331 | { $$ = 0; } | |
a0d0e21e | 332 | | use |
85e6fe83 | 333 | { $$ = 0; } |
8d063cd8 LW |
334 | ; |
335 | ||
44a8e56a | 336 | format : FORMAT startformsub formname block |
a0d0e21e | 337 | { newFORM($2, $3, $4); } |
44a8e56a | 338 | ; |
339 | ||
340 | formname: WORD { $$ = $1; } | |
341 | | /* NULL */ { $$ = Nullop; } | |
8d063cd8 LW |
342 | ; |
343 | ||
891be019 | 344 | /* Unimplemented "my sub foo { }" */ |
09bef843 SB |
345 | mysubrout: MYSUB startsub subname proto subattrlist subbody |
346 | { newMYSUB($2, $3, $4, $5, $6); } | |
347 | ; | |
348 | ||
891be019 | 349 | /* Subroutine definition */ |
09bef843 SB |
350 | subrout : SUB startsub subname proto subattrlist subbody |
351 | { newATTRSUB($2, $3, $4, $5, $6); } | |
28757baa | 352 | ; |
353 | ||
fa83b5b6 | 354 | startsub: /* NULL */ /* start a regular subroutine scope */ |
774d564b | 355 | { $$ = start_subparse(FALSE, 0); } |
28757baa | 356 | ; |
357 | ||
358 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ | |
774d564b | 359 | { $$ = start_subparse(FALSE, CVf_ANON); } |
28757baa | 360 | ; |
361 | ||
44a8e56a | 362 | startformsub: /* NULL */ /* start a format subroutine scope */ |
774d564b | 363 | { $$ = start_subparse(TRUE, 0); } |
44a8e56a | 364 | ; |
365 | ||
891be019 | 366 | /* Name of a subroutine - must be a bareword, could be special */ |
2d8e6c8d | 367 | subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); |
e858de61 | 368 | if (strEQ(name, "BEGIN") || strEQ(name, "END") |
7d30b5c4 | 369 | || strEQ(name, "INIT") || strEQ(name, "CHECK")) |
1aff0e91 | 370 | CvSPECIAL_on(PL_compcv); |
28757baa | 371 | $$ = $1; } |
a0d0e21e LW |
372 | ; |
373 | ||
891be019 | 374 | /* Subroutine prototype */ |
4633a7c4 LW |
375 | proto : /* NULL */ |
376 | { $$ = Nullop; } | |
377 | | THING | |
378 | ; | |
28757baa | 379 | |
891be019 | 380 | /* Optional list of subroutine attributes */ |
09bef843 SB |
381 | subattrlist: /* NULL */ |
382 | { $$ = Nullop; } | |
383 | | COLONATTR THING | |
384 | { $$ = $2; } | |
385 | | COLONATTR | |
386 | { $$ = Nullop; } | |
387 | ; | |
388 | ||
891be019 | 389 | /* List of attributes for a "my" variable declaration */ |
09bef843 SB |
390 | myattrlist: COLONATTR THING |
391 | { $$ = $2; } | |
392 | | COLONATTR | |
393 | { $$ = Nullop; } | |
394 | ; | |
395 | ||
891be019 | 396 | /* Subroutine body - either null or a block */ |
28757baa | 397 | subbody : block { $$ = $1; } |
3280af22 | 398 | | ';' { $$ = Nullop; PL_expect = XSTATE; } |
8d063cd8 LW |
399 | ; |
400 | ||
a687059c | 401 | package : PACKAGE WORD ';' |
79072805 | 402 | { package($2); } |
93a17b20 LW |
403 | | PACKAGE ';' |
404 | { package(Nullop); } | |
a687059c LW |
405 | ; |
406 | ||
28757baa | 407 | use : USE startsub |
1aff0e91 | 408 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } |
28757baa | 409 | WORD WORD listexpr ';' |
410 | { utilize($1, $2, $4, $5, $6); } | |
85e6fe83 LW |
411 | ; |
412 | ||
891be019 | 413 | /* Ordinary expressions; logical combinations */ |
a0d0e21e LW |
414 | expr : expr ANDOP expr |
415 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } | |
416 | | expr OROP expr | |
417 | { $$ = newLOGOP($2, 0, $1, $3); } | |
fad39ff1 | 418 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
419 | ; |
420 | ||
891be019 | 421 | /* Expressions are a list of terms joined by commas */ |
a0d0e21e LW |
422 | argexpr : argexpr ',' |
423 | { $$ = $1; } | |
424 | | argexpr ',' term | |
79072805 | 425 | { $$ = append_elem(OP_LIST, $1, $3); } |
fad39ff1 | 426 | | term %prec PREC_LOW |
8d063cd8 LW |
427 | ; |
428 | ||
891be019 SC |
429 | /* List operators */ |
430 | listop : LSTOP indirob argexpr /* print $fh @args */ | |
79072805 | 431 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 432 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
891be019 | 433 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
79072805 | 434 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e | 435 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
891be019 | 436 | | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ |
4633a7c4 | 437 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 438 | append_elem(OP_LIST, |
55497cff | 439 | prepend_elem(OP_LIST, scalar($1), $5), |
a0d0e21e | 440 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 | 441 | | term ARROW method /* $foo->bar */ |
b1524f17 SM |
442 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
443 | append_elem(OP_LIST, scalar($1), | |
444 | newUNOP(OP_METHOD, 0, $3))); } | |
891be019 | 445 | | METHOD indirob listexpr /* new Class @args */ |
4633a7c4 | 446 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 447 | append_elem(OP_LIST, |
4633a7c4 | 448 | prepend_elem(OP_LIST, $2, $3), |
a0d0e21e | 449 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 450 | | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ |
4633a7c4 | 451 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e | 452 | append_elem(OP_LIST, |
4633a7c4 | 453 | prepend_elem(OP_LIST, $2, $4), |
a0d0e21e | 454 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 | 455 | | LSTOP listexpr /* print @args */ |
79072805 | 456 | { $$ = convert($1, 0, $2); } |
891be019 | 457 | | FUNC '(' listexprcom ')' /* print (@args) */ |
79072805 | 458 | { $$ = convert($1, 0, $3); } |
891be019 | 459 | | LSTOPSUB startanonsub block /* map { foo } ... */ |
09bef843 | 460 | { $3 = newANONATTRSUB($2, 0, Nullop, $3); } |
891be019 | 461 | listexpr %prec LSTOP /* ... @bar */ |
4633a7c4 | 462 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
28757baa | 463 | append_elem(OP_LIST, |
464 | prepend_elem(OP_LIST, $3, $5), $1)); } | |
a687059c LW |
465 | ; |
466 | ||
891be019 | 467 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e LW |
468 | method : METHOD |
469 | | scalar | |
470 | ; | |
471 | ||
891be019 SC |
472 | /* Some kind of subscripted expression */ |
473 | subscripted: star '{' expr ';' '}' /* *main::{something} */ | |
474 | /* In this and all the hash accessors, ';' is | |
475 | * provided by the tokeniser */ | |
fad39ff1 | 476 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); } |
891be019 | 477 | | scalar '[' expr ']' /* $array[$element] */ |
fad39ff1 | 478 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
891be019 | 479 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 SM |
480 | { $$ = newBINOP(OP_AELEM, 0, |
481 | ref(newAVREF($1),OP_RV2AV), | |
482 | scalar($4));} | |
891be019 | 483 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 SM |
484 | { $$ = newBINOP(OP_AELEM, 0, |
485 | ref(newAVREF($1),OP_RV2AV), | |
486 | scalar($3));} | |
891be019 | 487 | | scalar '{' expr ';' '}' /* $foo->{bar();} */ |
fad39ff1 SM |
488 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
489 | PL_expect = XOPERATOR; } | |
891be019 | 490 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 SM |
491 | { $$ = newBINOP(OP_HELEM, 0, |
492 | ref(newHVREF($1),OP_RV2HV), | |
493 | jmaybe($4)); | |
494 | PL_expect = XOPERATOR; } | |
891be019 | 495 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 SM |
496 | { $$ = newBINOP(OP_HELEM, 0, |
497 | ref(newHVREF($1),OP_RV2HV), | |
498 | jmaybe($3)); | |
499 | PL_expect = XOPERATOR; } | |
891be019 | 500 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 SM |
501 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
502 | newCVREF(0, scalar($1))); } | |
891be019 | 503 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 SM |
504 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
505 | append_elem(OP_LIST, $4, | |
506 | newCVREF(0, scalar($1)))); } | |
507 | ||
891be019 | 508 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 SM |
509 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
510 | append_elem(OP_LIST, $3, | |
511 | newCVREF(0, scalar($1)))); } | |
891be019 | 512 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 SM |
513 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
514 | newCVREF(0, scalar($1))); } | |
891be019 | 515 | ; |
fad39ff1 | 516 | |
891be019 SC |
517 | /* Binary operators between terms */ |
518 | termbinop : term ASSIGNOP term /* $x = $y */ | |
a0d0e21e | 519 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 | 520 | | term POWOP term /* $x ** $y */ |
79072805 | 521 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 522 | | term MULOP term /* $x * $y, $x x $y */ |
79072805 LW |
523 | { if ($2 != OP_REPEAT) |
524 | scalar($1); | |
525 | $$ = newBINOP($2, 0, $1, scalar($3)); } | |
891be019 | 526 | | term ADDOP term /* $x + $y */ |
79072805 | 527 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 528 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
79072805 | 529 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 530 | | term RELOP term /* $x > $y, etc. */ |
79072805 | 531 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 532 | | term EQOP term /* $x == $y, $x eq $y */ |
79072805 | 533 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 534 | | term BITANDOP term /* $x & $y */ |
79072805 | 535 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 536 | | term BITOROP term /* $x | $y */ |
79072805 | 537 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 | 538 | | term DOTDOT term /* $x..$y, $x...$y */ |
79072805 | 539 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
891be019 | 540 | | term ANDAND term /* $x && $y */ |
463ee0b2 | 541 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 | 542 | | term OROR term /* $x || $y */ |
463ee0b2 | 543 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
891be019 | 544 | | term MATCHOP term /* $x =~ /$y/ */ |
79072805 | 545 | { $$ = bind_match($2, $1, $3); } |
891be019 | 546 | ; |
8d063cd8 | 547 | |
891be019 SC |
548 | /* Unary operators and terms */ |
549 | termunop : '-' term %prec UMINUS /* -$x */ | |
79072805 | 550 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 | 551 | | '+' term %prec UMINUS /* +$x */ |
a687059c | 552 | { $$ = $2; } |
891be019 | 553 | | '!' term /* !$x */ |
79072805 | 554 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 555 | | '~' term /* ~$x */ |
79072805 | 556 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
891be019 | 557 | | term POSTINC /* $x++ */ |
79072805 | 558 | { $$ = newUNOP(OP_POSTINC, 0, |
463ee0b2 | 559 | mod(scalar($1), OP_POSTINC)); } |
891be019 | 560 | | term POSTDEC /* $x-- */ |
79072805 | 561 | { $$ = newUNOP(OP_POSTDEC, 0, |
463ee0b2 | 562 | mod(scalar($1), OP_POSTDEC)); } |
891be019 | 563 | | PREINC term /* ++$x */ |
79072805 | 564 | { $$ = newUNOP(OP_PREINC, 0, |
463ee0b2 | 565 | mod(scalar($2), OP_PREINC)); } |
891be019 | 566 | | PREDEC term /* --$x */ |
79072805 | 567 | { $$ = newUNOP(OP_PREDEC, 0, |
463ee0b2 | 568 | mod(scalar($2), OP_PREDEC)); } |
891be019 SC |
569 | |
570 | ; | |
571 | ||
572 | /* Constructors for anonymous data */ | |
573 | anonymous: '[' expr ']' | |
574 | { $$ = newANONLIST($2); } | |
575 | | '[' ']' | |
576 | { $$ = newANONLIST(Nullop); } | |
577 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ | |
578 | { $$ = newANONHASH($2); } | |
579 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ | |
580 | { $$ = newANONHASH(Nullop); } | |
581 | | ANONSUB startanonsub proto subattrlist block %prec '(' | |
582 | { $$ = newANONATTRSUB($2, $3, $4, $5); } | |
583 | ||
584 | ; | |
585 | ||
586 | /* Things called with "do" */ | |
587 | termdo : DO term %prec UNIOP /* do $filename */ | |
588 | { $$ = dofile($2); } | |
589 | | DO block %prec '(' /* do { code */ | |
590 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } | |
591 | | DO WORD '(' ')' /* do somesub() */ | |
592 | { $$ = newUNOP(OP_ENTERSUB, | |
593 | OPf_SPECIAL|OPf_STACKED, | |
594 | prepend_elem(OP_LIST, | |
595 | scalar(newCVREF( | |
596 | (OPpENTERSUB_AMPER<<8), | |
597 | scalar($2) | |
598 | )),Nullop)); dep();} | |
599 | | DO WORD '(' expr ')' /* do somesub(@args) */ | |
600 | { $$ = newUNOP(OP_ENTERSUB, | |
601 | OPf_SPECIAL|OPf_STACKED, | |
602 | append_elem(OP_LIST, | |
603 | $4, | |
604 | scalar(newCVREF( | |
605 | (OPpENTERSUB_AMPER<<8), | |
606 | scalar($2) | |
607 | )))); dep();} | |
608 | | DO scalar '(' ')' /* do $subref () */ | |
609 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
610 | prepend_elem(OP_LIST, | |
611 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} | |
612 | | DO scalar '(' expr ')' /* do $subref (@args) */ | |
613 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, | |
614 | prepend_elem(OP_LIST, | |
615 | $4, | |
616 | scalar(newCVREF(0,scalar($2))))); dep();} | |
617 | ||
618 | ; | |
619 | ||
620 | term : termbinop | |
621 | | termunop | |
622 | | anonymous | |
623 | | termdo | |
624 | | term '?' term ':' term | |
625 | { $$ = newCONDOP(0, $1, $3, $5); } | |
626 | | REFGEN term /* \$x, \@y, \%z */ | |
627 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } | |
09bef843 SB |
628 | | myattrterm %prec UNIOP |
629 | { $$ = $1; } | |
630 | | LOCAL term %prec UNIOP | |
93a17b20 | 631 | { $$ = localize($2,$1); } |
a0d0e21e | 632 | | '(' expr ')' |
79072805 | 633 | { $$ = sawparens($2); } |
8d063cd8 | 634 | | '(' ')' |
8990e307 | 635 | { $$ = sawparens(newNULLLIST()); } |
79072805 | 636 | | scalar %prec '(' |
8d063cd8 | 637 | { $$ = $1; } |
79072805 | 638 | | star %prec '(' |
8d063cd8 | 639 | { $$ = $1; } |
79072805 | 640 | | hsh %prec '(' |
8d063cd8 | 641 | { $$ = $1; } |
79072805 | 642 | | ary %prec '(' |
8d063cd8 | 643 | { $$ = $1; } |
891be019 | 644 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 | 645 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 SM |
646 | | subscripted |
647 | { $$ = $1; } | |
891be019 | 648 | | '(' expr ')' '[' expr ']' /* list slice */ |
79072805 | 649 | { $$ = newSLICEOP(0, $5, $2); } |
891be019 | 650 | | '(' ')' '[' expr ']' /* empty list slice! */ |
79072805 | 651 | { $$ = newSLICEOP(0, $4, Nullop); } |
891be019 | 652 | | ary '[' expr ']' /* array slice */ |
79072805 LW |
653 | { $$ = prepend_elem(OP_ASLICE, |
654 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
655 | newLISTOP(OP_ASLICE, 0, |
656 | list($3), | |
a0d0e21e | 657 | ref($1, OP_ASLICE))); } |
891be019 | 658 | | ary '{' expr ';' '}' /* @hash{@keys} */ |
79072805 LW |
659 | { $$ = prepend_elem(OP_HSLICE, |
660 | newOP(OP_PUSHMARK, 0), | |
79072805 LW |
661 | newLISTOP(OP_HSLICE, 0, |
662 | list($3), | |
a0d0e21e | 663 | ref(oopsHV($1), OP_HSLICE))); |
3280af22 | 664 | PL_expect = XOPERATOR; } |
79072805 LW |
665 | | THING %prec '(' |
666 | { $$ = $1; } | |
891be019 | 667 | | amper /* &foo; */ |
c07a80fd | 668 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
891be019 | 669 | | amper '(' ')' /* &foo() */ |
a0d0e21e | 670 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 | 671 | | amper '(' expr ')' /* &foo(@args) */ |
a0d0e21e | 672 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 673 | append_elem(OP_LIST, $3, scalar($1))); } |
891be019 | 674 | | NOAMP WORD listexpr /* foo(@args) */ |
a0d0e21e | 675 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
a5f75d66 | 676 | append_elem(OP_LIST, $3, scalar($2))); } |
891be019 | 677 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
85e6fe83 | 678 | { $$ = newOP($1, OPf_SPECIAL); |
3280af22 | 679 | PL_hints |= HINT_BLOCK_SCOPE; } |
a0d0e21e | 680 | | LOOPEX term |
8990e307 | 681 | { $$ = newLOOPEX($1,$2); } |
891be019 | 682 | | NOTOP argexpr /* not $foo */ |
c07a80fd | 683 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 | 684 | | UNIOP /* Unary op, $_ implied */ |
79072805 | 685 | { $$ = newOP($1, 0); } |
891be019 | 686 | | UNIOP block /* eval { foo }, I *think* */ |
79072805 | 687 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 688 | | UNIOP term /* Unary op */ |
79072805 | 689 | { $$ = newUNOP($1, 0, $2); } |
891be019 | 690 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 LW |
691 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
692 | append_elem(OP_LIST, $2, scalar($1))); } | |
891be019 | 693 | | FUNC0 /* Nullary operator */ |
79072805 | 694 | { $$ = newOP($1, 0); } |
ae986130 | 695 | | FUNC0 '(' ')' |
79072805 | 696 | { $$ = newOP($1, 0); } |
891be019 | 697 | | FUNC0SUB /* Sub treated as nullop */ |
28757baa | 698 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 | 699 | scalar($1)); } |
891be019 | 700 | | FUNC1 '(' ')' /* not () */ |
79072805 | 701 | { $$ = newOP($1, OPf_SPECIAL); } |
891be019 | 702 | | FUNC1 '(' expr ')' /* not($foo) */ |
79072805 | 703 | { $$ = newUNOP($1, 0, $3); } |
891be019 | 704 | | PMFUNC '(' term ')' /* split (/foo/) */ |
79072805 | 705 | { $$ = pmruntime($1, $3, Nullop); } |
891be019 | 706 | | PMFUNC '(' term ',' term ')' /* split (/foo/,$bar) */ |
79072805 LW |
707 | { $$ = pmruntime($1, $3, $5); } |
708 | | WORD | |
378cc40b | 709 | | listop |
8d063cd8 LW |
710 | ; |
711 | ||
891be019 | 712 | /* "my" declarations, with optional attributes */ |
09bef843 SB |
713 | myattrterm: MY myterm myattrlist |
714 | { $$ = my_attrs($2,$3); } | |
715 | | MY myterm | |
716 | { $$ = localize($2,$1); } | |
717 | ; | |
718 | ||
891be019 | 719 | /* Things that can be "my"'d */ |
09bef843 SB |
720 | myterm : '(' expr ')' |
721 | { $$ = sawparens($2); } | |
722 | | '(' ')' | |
723 | { $$ = sawparens(newNULLLIST()); } | |
724 | | scalar %prec '(' | |
725 | { $$ = $1; } | |
726 | | hsh %prec '(' | |
727 | { $$ = $1; } | |
728 | | ary %prec '(' | |
729 | { $$ = $1; } | |
730 | ; | |
731 | ||
891be019 | 732 | /* Basic list expressions */ |
fad39ff1 | 733 | listexpr: /* NULL */ %prec PREC_LOW |
8990e307 | 734 | { $$ = Nullop; } |
fad39ff1 | 735 | | argexpr %prec PREC_LOW |
a0d0e21e LW |
736 | { $$ = $1; } |
737 | ; | |
738 | ||
739 | listexprcom: /* NULL */ | |
740 | { $$ = Nullop; } | |
79072805 LW |
741 | | expr |
742 | { $$ = $1; } | |
a0d0e21e LW |
743 | | expr ',' |
744 | { $$ = $1; } | |
79072805 LW |
745 | ; |
746 | ||
891be019 SC |
747 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
748 | lexical */ | |
55497cff | 749 | my_scalar: scalar |
3280af22 | 750 | { PL_in_my = 0; $$ = my($1); } |
55497cff | 751 | ; |
752 | ||
79072805 | 753 | amper : '&' indirob |
c07a80fd | 754 | { $$ = newCVREF($1,$2); } |
a687059c LW |
755 | ; |
756 | ||
79072805 LW |
757 | scalar : '$' indirob |
758 | { $$ = newSVREF($2); } | |
a687059c LW |
759 | ; |
760 | ||
79072805 LW |
761 | ary : '@' indirob |
762 | { $$ = newAVREF($2); } | |
763 | ; | |
764 | ||
765 | hsh : '%' indirob | |
766 | { $$ = newHVREF($2); } | |
767 | ; | |
768 | ||
769 | arylen : DOLSHARP indirob | |
770 | { $$ = newAVREF($2); } | |
771 | ; | |
772 | ||
773 | star : '*' indirob | |
a0d0e21e | 774 | { $$ = newGVREF(0,$2); } |
79072805 LW |
775 | ; |
776 | ||
891be019 | 777 | /* Indirect objects */ |
79072805 LW |
778 | indirob : WORD |
779 | { $$ = scalar($1); } | |
fad39ff1 | 780 | | scalar %prec PREC_LOW |
463ee0b2 | 781 | { $$ = scalar($1); } |
79072805 | 782 | | block |
a0d0e21e | 783 | { $$ = scope($1); } |
79072805 | 784 | |
93a17b20 LW |
785 | | PRIVATEREF |
786 | { $$ = $1; } | |
8d063cd8 LW |
787 | ; |
788 | ||
789 | %% /* PROGRAM */ | |
09bef843 SB |
790 | |
791 | /* more stuff added to make perly_c.diff easier to apply */ | |
792 | ||
793 | #ifdef yyparse | |
794 | #undef yyparse | |
795 | #endif | |
796 | #define yyparse() Perl_yyparse(pTHX) | |
797 |