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a0d0e21e 1/* perly.y
a687059c 2 *
f05e27e5 3 * Copyright (c) 1991-2002, 2003, 2004, 2005, 2006 Larry Wall
2eee27d7 4 * Copyright (c) 2007, 2008, 2009, 2010, 2011 by Larry Wall and others
a687059c 5 *
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6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
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9 */
10
11/*
12 * 'I see,' laughed Strider. 'I look foul and feel fair. Is that it?
4ac71550 13 * All that is gold does not glitter, not all those who wander are lost.'
f05e27e5 14 *
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15 * [p.171 of _The Lord of the Rings_, I/x: "Strider"]
16 */
17
18/*
f05e27e5 19 * This file holds the grammar for the Perl language. If edited, you need
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20 * to run regen_perly.pl, which re-creates the files perly.h, perly.tab
21 * and perly.act which are derived from this.
22 *
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23 * Note that these derived files are included and compiled twice; once
24 * from perly.c, and once from madly.c. The second time, a number of MAD
25 * macros are defined, which compile in extra code that allows the parse
26 * tree to be accurately dumped. In particular:
27 *
28 * MAD defined if compiling madly.c
29 * DO_MAD(A) expands to A under madly.c, to null otherwise
30 * IF_MAD(a,b) expands to A under madly.c, to B otherwise
31 * TOKEN_GETMAD() expands to token_getmad() under madly.c, to null otherwise
32 * TOKEN_FREE() similarly
33 * OP_GETMAD() similarly
34 * IVAL(i) expands to (i)->tk_lval.ival or (i)
35 * PVAL(p) expands to (p)->tk_lval.pval or (p)
36 *
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37 * The main job of of this grammar is to call the various newFOO()
38 * functions in op.c to build a syntax tree of OP structs.
61296642 39 * It relies on the lexer in toke.c to do the tokenizing.
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40 *
41 * Note: due to the way that the cleanup code works WRT to freeing ops on
42 * the parse stack, it is dangerous to assign to the $n variables within
43 * an action.
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44 */
45
0de566d7 46/* Make the parser re-entrant. */
8d063cd8 47
0de566d7 48%pure_parser
8d063cd8 49
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50/* FIXME for MAD - is the new mintro on while and until important? */
51
28ac2b49 52%start grammar
9d116dd7 53
8d063cd8 54%union {
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55 I32 ival; /* __DEFAULT__ (marker for regen_perly.pl;
56 must always be 1st union member) */
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57 char *pval;
58 OP *opval;
59 GV *gvval;
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60#ifdef PERL_IN_MADLY_C
61 TOKEN* p_tkval;
123d08c9 62 TOKEN* i_tkval;
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63#else
64 char *p_tkval;
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65 I32 i_tkval;
66#endif
67#ifdef PERL_MAD
68 TOKEN* tkval;
f05e27e5 69#endif
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70}
71
78cdf107 72%token <ival> GRAMPROG GRAMEXPR GRAMBLOCK GRAMBARESTMT GRAMFULLSTMT GRAMSTMTSEQ
28ac2b49 73
7c70caa5 74%token <i_tkval> '{' '}' '[' ']' '-' '+' '$' '@' '%' '*' '&' ';' '=' '.'
f0fcb552 75
ea25a9b2 76%token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF QWLIST
7eb971ee 77%token <opval> FUNC0OP FUNC0SUB UNIOPSUB LSTOPSUB
88e1f1a2 78%token <opval> PLUGEXPR PLUGSTMT
f05e27e5 79%token <p_tkval> LABEL
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80%token <i_tkval> FORMAT SUB ANONSUB PACKAGE USE
81%token <i_tkval> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR
82%token <i_tkval> GIVEN WHEN DEFAULT
be25f609 83%token <i_tkval> LOOPEX DOTDOT YADAYADA
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84%token <i_tkval> FUNC0 FUNC1 FUNC UNIOP LSTOP
85%token <i_tkval> RELOP EQOP MULOP ADDOP
86%token <i_tkval> DOLSHARP DO HASHBRACK NOAMP
8d2a5fb4 87%token <i_tkval> LOCAL MY REQUIRE
705fe0e5 88%token <i_tkval> COLONATTR FORMLBRACK FORMRBRACK
f05e27e5 89
727a8fe5 90%type <ival> grammar remember mremember
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91%type <ival> startsub startanonsub startformsub
92/* FIXME for MAD - are these two ival? */
b5a64814 93%type <ival> mintro
f05e27e5 94
8e720305 95%type <opval> stmtseq fullstmt labfullstmt barestmt block mblock else
fad39ff1 96%type <opval> expr term subscripted scalar ary hsh arylen star amper sideff
76eba8ab 97%type <opval> sliceme kvslice gelem
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98%type <opval> listexpr nexpr texpr iexpr mexpr mnexpr miexpr
99%type <opval> optlistexpr optexpr indirob listop method
30d9c59b 100%type <opval> formname subname proto optsubbody cont my_scalar formblock
f05e27e5 101%type <opval> subattrlist myattrlist myattrterm myterm
30d9c59b 102%type <opval> realsubbody subsignature termbinop termunop anonymous termdo
705fe0e5 103%type <opval> formstmtseq formline formarg
79072805 104
123d08c9 105%nonassoc <i_tkval> PREC_LOW
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106%nonassoc LOOPEX
107
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108%left <i_tkval> OROP DOROP
109%left <i_tkval> ANDOP
110%right <i_tkval> NOTOP
36477c24 111%nonassoc LSTOP LSTOPSUB
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112%left <i_tkval> ','
113%right <i_tkval> ASSIGNOP
114%right <i_tkval> '?' ':'
be25f609 115%nonassoc DOTDOT YADAYADA
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116%left <i_tkval> OROR DORDOR
117%left <i_tkval> ANDAND
118%left <i_tkval> BITOROP
119%left <i_tkval> BITANDOP
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120%nonassoc EQOP
121%nonassoc RELOP
36477c24 122%nonassoc UNIOP UNIOPSUB
20515881 123%nonassoc REQUIRE
123d08c9 124%left <i_tkval> SHIFTOP
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125%left ADDOP
126%left MULOP
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127%left <i_tkval> MATCHOP
128%right <i_tkval> '!' '~' UMINUS REFGEN
129%right <i_tkval> POWOP
cc624add 130%nonassoc <i_tkval> PREINC PREDEC POSTINC POSTDEC POSTJOIN
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131%left <i_tkval> ARROW
132%nonassoc <i_tkval> ')'
133%left <i_tkval> '('
fad39ff1 134%left '[' '{'
8d063cd8 135
123d08c9 136%token <i_tkval> PEG
7f46837f 137
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138%% /* RULES */
139
28ac2b49 140/* Top-level choice of what kind of thing yyparse was called to parse */
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141grammar : GRAMPROG
142 {
143 PL_parser->expect = XSTATE;
144 }
145 remember stmtseq
146 {
147 newPROG(block_end($3,$4));
148 $$ = 0;
149 }
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150 | GRAMEXPR
151 {
152 parser->expect = XTERM;
153 }
09b1cffe 154 optexpr
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155 {
156 PL_eval_root = $3;
157 $$ = 0;
158 }
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159 | GRAMBLOCK
160 {
161 parser->expect = XBLOCK;
162 }
163 block
164 {
5f211341 165 PL_pad_reset_pending = TRUE;
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166 PL_eval_root = $3;
167 $$ = 0;
168 yyunlex();
169 parser->yychar = YYEOF;
170 }
171 | GRAMBARESTMT
172 {
173 parser->expect = XSTATE;
174 }
175 barestmt
176 {
177 PL_pad_reset_pending = TRUE;
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178 PL_eval_root = $3;
179 $$ = 0;
180 yyunlex();
181 parser->yychar = YYEOF;
182 }
9eb5c532 183 | GRAMFULLSTMT
28ac2b49 184 {
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185 parser->expect = XSTATE;
186 }
187 fullstmt
188 {
5f211341 189 PL_pad_reset_pending = TRUE;
9eb5c532 190 PL_eval_root = $3;
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191 $$ = 0;
192 yyunlex();
193 parser->yychar = YYEOF;
194 }
07ffcb73
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195 | GRAMSTMTSEQ
196 {
197 parser->expect = XSTATE;
198 }
5f211341 199 stmtseq
07ffcb73
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200 {
201 PL_eval_root = $3;
202 $$ = 0;
203 }
204 ;
205
891be019 206/* An ordinary block */
5f211341 207block : '{' remember stmtseq '}'
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208 { if (PL_parser->copline > (line_t)IVAL($1))
209 PL_parser->copline = (line_t)IVAL($1);
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210 $$ = block_end($2, $3);
211 TOKEN_GETMAD($1,$$,'{');
212 TOKEN_GETMAD($4,$$,'}');
213 }
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214 ;
215
7c70caa5 216/* format body */
705fe0e5 217formblock: '=' remember ';' FORMRBRACK formstmtseq ';' '.'
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218 { if (PL_parser->copline > (line_t)IVAL($1))
219 PL_parser->copline = (line_t)IVAL($1);
705fe0e5 220 $$ = block_end($2, $5);
7c70caa5 221 TOKEN_GETMAD($1,$$,'{');
705fe0e5 222 TOKEN_GETMAD($7,$$,'}');
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FC
223 }
224 ;
225
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PP
226remember: /* NULL */ /* start a full lexical scope */
227 { $$ = block_start(TRUE); }
228 ;
229
5f211341 230mblock : '{' mremember stmtseq '}'
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231 { if (PL_parser->copline > (line_t)IVAL($1))
232 PL_parser->copline = (line_t)IVAL($1);
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233 $$ = block_end($2, $3);
234 TOKEN_GETMAD($1,$$,'{');
235 TOKEN_GETMAD($4,$$,'}');
236 }
55497cff
PP
237 ;
238
239mremember: /* NULL */ /* start a partial lexical scope */
240 { $$ = block_start(FALSE); }
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241 ;
242
eae48c89 243/* A sequence of statements in the program */
5f211341 244stmtseq : /* NULL */
bcabcc50 245 { $$ = (OP*)NULL; }
5f211341 246 | stmtseq fullstmt
2fcb4757 247 { $$ = op_append_list(OP_LINESEQ, $1, $2);
3280af22 248 PL_pad_reset_pending = TRUE;
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249 if ($1 && $2)
250 PL_hints |= HINT_BLOCK_SCOPE;
251 }
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LW
252 ;
253
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254/* A sequence of format lines */
255formstmtseq: /* NULL */
256 { $$ = (OP*)NULL; }
257 | formstmtseq formline
258 { $$ = op_append_list(OP_LINESEQ, $1, $2);
259 PL_pad_reset_pending = TRUE;
260 if ($1 && $2)
261 PL_hints |= HINT_BLOCK_SCOPE;
262 }
263 ;
264
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265/* A statement in the program, including optional labels */
266fullstmt: barestmt
eae48c89 267 {
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268 if($1) {
269 $$ = newSTATEOP(0, NULL, $1);
eae48c89 270 } else {
8e720305 271 $$ = IF_MAD(newOP(OP_NULL, 0), NULL);
eae48c89
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272 }
273 }
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274 | labfullstmt
275 { $$ = $1; }
276 ;
277
278labfullstmt: LABEL barestmt
279 {
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280 $$ = newSTATEOP(SVf_UTF8
281 * PVAL($1)[strlen(PVAL($1))+1],
282 PVAL($1), $2);
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283 TOKEN_GETMAD($1,
284 $2 ? cLISTOPx($$)->op_first : $$, 'L');
285 }
286 | LABEL labfullstmt
287 {
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288 $$ = newSTATEOP(SVf_UTF8
289 * PVAL($1)[strlen(PVAL($1))+1],
290 PVAL($1), $2);
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291 TOKEN_GETMAD($1, cLISTOPx($$)->op_first, 'L');
292 }
eae48c89
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293 ;
294
295/* A bare statement, lacking label and other aspects of state op */
296barestmt: PLUGSTMT
0d863452 297 { $$ = $1; }
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298 | PEG
299 {
300 $$ = newOP(OP_NULL,0);
301 TOKEN_GETMAD($1,$$,'p');
302 }
7c70caa5 303 | FORMAT startformsub formname formblock
f05e27e5 304 {
eae48c89 305 CV *fmtcv = PL_compcv;
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306#ifdef MAD
307 $$ = newFORM($2, $3, $4);
308 prepend_madprops($1->tk_mad, $$, 'F');
309 $1->tk_mad = 0;
310 token_free($1);
311#else
312 newFORM($2, $3, $4);
313 $$ = (OP*)NULL;
314#endif
4a273b91 315 if (CvOUTSIDE(fmtcv) && !CvEVAL(CvOUTSIDE(fmtcv))) {
eae48c89 316 SvREFCNT_inc_simple_void(fmtcv);
cc76b5cc 317 pad_add_anon(fmtcv, OP_NULL);
f05e27e5 318 }
eae48c89 319 }
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320 | SUB subname startsub
321 {
322 if ($2->op_type == OP_CONST) {
323 const char *const name =
324 SvPV_nolen_const(((SVOP*)$2)->op_sv);
325 if (strEQ(name, "BEGIN") || strEQ(name, "END")
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FC
326 || strEQ(name, "INIT") || strEQ(name, "CHECK")
327 || strEQ(name, "UNITCHECK"))
328 CvSPECIAL_on(PL_compcv);
50278755 329 }
e07561e6
FC
330 else
331 /* State subs inside anonymous subs need to be
332 clonable themselves. */
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FC
333 if (CvANON(CvOUTSIDE(PL_compcv))
334 || CvCLONE(CvOUTSIDE(PL_compcv))
335 || !PadnameIsSTATE(PadlistNAMESARRAY(CvPADLIST(
336 CvOUTSIDE(PL_compcv)
337 ))[$2->op_targ]))
e07561e6 338 CvCLONE_on(PL_compcv);
764212cf
FC
339 PL_parser->in_my = 0;
340 PL_parser->in_my_stash = NULL;
341 }
30d9c59b 342 proto subattrlist optsubbody
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343 {
344 SvREFCNT_inc_simple_void(PL_compcv);
345#ifdef MAD
346 {
347 OP* o = newSVOP(OP_ANONCODE, 0,
50278755
FC
348 (SV*)(
349#endif
350 $2->op_type == OP_CONST
351 ? newATTRSUB($3, $2, $5, $6, $7)
352 : newMYSUB($3, $2, $5, $6, $7)
353#ifdef MAD
354 ));
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355 $$ = newOP(OP_NULL,0);
356 op_getmad(o,$$,'&');
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357 op_getmad($2,$$,'n');
358 op_getmad($5,$$,'s');
359 op_getmad($6,$$,'a');
eae48c89 360 token_getmad($1,$$,'d');
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FC
361 append_madprops($7->op_madprop, $$, 0);
362 $7->op_madprop = 0;
f05e27e5 363 }
eae48c89 364#else
50278755 365 ;
eae48c89
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366 $$ = (OP*)NULL;
367#endif
764212cf 368 intro_my();
f05e27e5 369 }
eae48c89 370 | PACKAGE WORD WORD ';'
5f211341 371 {
eae48c89
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372#ifdef MAD
373 $$ = package($3);
374 token_getmad($1,$$,'o');
375 if ($2)
376 package_version($2);
377 token_getmad($4,$$,';');
378#else
379 package($3);
380 if ($2)
381 package_version($2);
382 $$ = (OP*)NULL;
383#endif
384 }
385 | USE startsub
386 { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ }
09b1cffe 387 WORD WORD optlistexpr ';'
eae48c89
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388 {
389 SvREFCNT_inc_simple_void(PL_compcv);
390#ifdef MAD
391 $$ = utilize(IVAL($1), $2, $4, $5, $6);
392 token_getmad($1,$$,'o');
393 token_getmad($7,$$,';');
394 if (PL_parser->rsfp_filters &&
395 AvFILLp(PL_parser->rsfp_filters) >= 0)
396 append_madprops(newMADPROP('!', MAD_NULL, NULL, 0), $$, 0);
397#else
398 utilize(IVAL($1), $2, $4, $5, $6);
399 $$ = (OP*)NULL;
400#endif
401 }
417a992d 402 | IF '(' remember mexpr ')' mblock else
eae48c89 403 {
3ad73efd
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404 $$ = block_end($3,
405 newCONDOP(0, $4, op_scope($6), $7));
eae48c89
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406 TOKEN_GETMAD($1,$$,'I');
407 TOKEN_GETMAD($2,$$,'(');
408 TOKEN_GETMAD($5,$$,')');
409 PL_parser->copline = (line_t)IVAL($1);
410 }
417a992d 411 | UNLESS '(' remember miexpr ')' mblock else
eae48c89 412 {
3ad73efd
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413 $$ = block_end($3,
414 newCONDOP(0, $4, op_scope($6), $7));
eae48c89
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415 TOKEN_GETMAD($1,$$,'I');
416 TOKEN_GETMAD($2,$$,'(');
417 TOKEN_GETMAD($5,$$,')');
418 PL_parser->copline = (line_t)IVAL($1);
419 }
b5a64814 420 | GIVEN '(' remember mexpr ')' mblock
eae48c89 421 {
b5a64814 422 const PADOFFSET offset = pad_findmy_pvs("$_", 0);
eae48c89 423 $$ = block_end($3,
b5a64814
FC
424 newGIVENOP($4, op_scope($6),
425 offset == NOT_IN_PAD
426 || PAD_COMPNAME_FLAGS_isOUR(offset)
427 ? 0
428 : offset));
eae48c89
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429 PL_parser->copline = (line_t)IVAL($1);
430 }
417a992d 431 | WHEN '(' remember mexpr ')' mblock
3ad73efd 432 { $$ = block_end($3, newWHENOP($4, op_scope($6))); }
eae48c89 433 | DEFAULT block
3ad73efd 434 { $$ = newWHENOP(0, op_scope($2)); }
417a992d 435 | WHILE '(' remember texpr ')' mintro mblock cont
eae48c89
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436 {
437 $$ = block_end($3,
438 newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
94bf0465 439 $4, $7, $8, $6));
eae48c89
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440 TOKEN_GETMAD($1,$$,'W');
441 TOKEN_GETMAD($2,$$,'(');
442 TOKEN_GETMAD($5,$$,')');
443 PL_parser->copline = (line_t)IVAL($1);
444 }
417a992d 445 | UNTIL '(' remember iexpr ')' mintro mblock cont
eae48c89
Z
446 {
447 $$ = block_end($3,
94bf0465
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448 newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
449 $4, $7, $8, $6));
eae48c89
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450 TOKEN_GETMAD($1,$$,'W');
451 TOKEN_GETMAD($2,$$,'(');
452 TOKEN_GETMAD($5,$$,')');
453 PL_parser->copline = (line_t)IVAL($1);
454 }
417a992d 455 | FOR '(' remember mnexpr ';' texpr ';' mintro mnexpr ')'
eae48c89
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456 mblock
457 {
458 OP *initop = IF_MAD($4 ? $4 : newOP(OP_NULL, 0), $4);
459 OP *forop = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
94bf0465 460 scalar($6), $11, $9, $8);
eae48c89
Z
461 if (initop) {
462 forop = op_prepend_elem(OP_LINESEQ, initop,
463 op_append_elem(OP_LINESEQ,
464 newOP(OP_UNSTACK, OPf_SPECIAL),
465 forop));
5f211341 466 }
eae48c89
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467 DO_MAD({ forop = newUNOP(OP_NULL, 0, forop); })
468 $$ = block_end($3, forop);
469 TOKEN_GETMAD($1,$$,'3');
470 TOKEN_GETMAD($2,$$,'(');
471 TOKEN_GETMAD($5,$$,'1');
472 TOKEN_GETMAD($7,$$,'2');
473 TOKEN_GETMAD($10,$$,')');
474 PL_parser->copline = (line_t)IVAL($1);
475 }
417a992d 476 | FOR MY remember my_scalar '(' mexpr ')' mblock cont
eae48c89 477 {
94bf0465 478 $$ = block_end($3, newFOROP(0, $4, $6, $8, $9));
eae48c89
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479 TOKEN_GETMAD($1,$$,'W');
480 TOKEN_GETMAD($2,$$,'d');
481 TOKEN_GETMAD($5,$$,'(');
482 TOKEN_GETMAD($7,$$,')');
483 PL_parser->copline = (line_t)IVAL($1);
484 }
417a992d 485 | FOR scalar '(' remember mexpr ')' mblock cont
eae48c89 486 {
94bf0465 487 $$ = block_end($4, newFOROP(0,
3ad73efd 488 op_lvalue($2, OP_ENTERLOOP), $5, $7, $8));
eae48c89
Z
489 TOKEN_GETMAD($1,$$,'W');
490 TOKEN_GETMAD($3,$$,'(');
491 TOKEN_GETMAD($6,$$,')');
492 PL_parser->copline = (line_t)IVAL($1);
493 }
417a992d 494 | FOR '(' remember mexpr ')' mblock cont
eae48c89
Z
495 {
496 $$ = block_end($3,
94bf0465 497 newFOROP(0, (OP*)NULL, $4, $6, $7));
eae48c89
Z
498 TOKEN_GETMAD($1,$$,'W');
499 TOKEN_GETMAD($2,$$,'(');
500 TOKEN_GETMAD($5,$$,')');
501 PL_parser->copline = (line_t)IVAL($1);
502 }
503 | block cont
504 {
505 /* a block is a loop that happens once */
506 $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
94bf0465 507 (OP*)NULL, $1, $2, 0);
eae48c89
Z
508 }
509 | PACKAGE WORD WORD '{' remember
510 {
eae48c89 511 package($3);
eae48c89 512 if ($2) {
eae48c89 513 package_version($2);
eae48c89
Z
514 }
515 }
516 stmtseq '}'
517 {
518 /* a block is a loop that happens once */
94bf0465 519 $$ = newWHILEOP(0, 1, (LOOP*)(OP*)NULL,
eae48c89 520 (OP*)NULL, block_end($5, $7), (OP*)NULL, 0);
eae48c89
Z
521 TOKEN_GETMAD($4,$$,'{');
522 TOKEN_GETMAD($8,$$,'}');
523 if (PL_parser->copline > (line_t)IVAL($4))
524 PL_parser->copline = (line_t)IVAL($4);
525 }
526 | sideff ';'
527 {
528 PL_parser->expect = XSTATE;
529 $$ = $1;
530 TOKEN_GETMAD($2,$$,';');
531 }
532 | ';'
533 {
534 PL_parser->expect = XSTATE;
535 $$ = IF_MAD(newOP(OP_NULL, 0), (OP*)NULL);
536 TOKEN_GETMAD($1,$$,';');
537 PL_parser->copline = NOLINE;
5f211341 538 }
8d063cd8
LW
539 ;
540
705fe0e5
FC
541/* Format line */
542formline: THING formarg
543 { OP *list;
544 if ($2) {
545 OP *term = $2;
546 DO_MAD(term = newUNOP(OP_NULL, 0, term));
547 list = op_append_elem(OP_LIST, $1, term);
548 }
549 else {
550#ifdef MAD
551 OP *op = newNULLLIST();
552 list = op_append_elem(OP_LIST, $1, op);
553#else
554 list = $1;
555#endif
556 }
557 if (PL_parser->copline == NOLINE)
558 PL_parser->copline = CopLINE(PL_curcop)-1;
559 else PL_parser->copline--;
560 $$ = newSTATEOP(0, NULL,
561 convert(OP_FORMLINE, 0, list));
562 }
563 ;
564
565formarg : /* NULL */
566 { $$ = NULL; }
567 | FORMLBRACK stmtseq FORMRBRACK
568 { $$ = op_unscope($2); }
569 ;
570
891be019 571/* An expression which may have a side-effect */
a687059c 572sideff : error
bcabcc50 573 { $$ = (OP*)NULL; }
a687059c 574 | expr
79072805 575 { $$ = $1; }
a687059c 576 | expr IF expr
f05e27e5
DM
577 { $$ = newLOGOP(OP_AND, 0, $3, $1);
578 TOKEN_GETMAD($2,$$,'i');
579 }
a687059c 580 | expr UNLESS expr
f05e27e5
DM
581 { $$ = newLOGOP(OP_OR, 0, $3, $1);
582 TOKEN_GETMAD($2,$$,'i');
583 }
a687059c 584 | expr WHILE expr
f05e27e5
DM
585 { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1);
586 TOKEN_GETMAD($2,$$,'w');
587 }
55497cff 588 | expr UNTIL iexpr
f05e27e5
DM
589 { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);
590 TOKEN_GETMAD($2,$$,'w');
591 }
ecca16b0 592 | expr FOR expr
94bf0465 593 { $$ = newFOROP(0, (OP*)NULL, $3, $1, (OP*)NULL);
eae48c89 594 TOKEN_GETMAD($2,$$,'w');
94bf0465 595 PL_parser->copline = (line_t)IVAL($2);
f05e27e5 596 }
f20dcd76 597 | expr WHEN expr
3ad73efd 598 { $$ = newWHENOP($3, op_scope($1)); }
79072805
LW
599 ;
600
891be019 601/* else and elsif blocks */
79072805 602else : /* NULL */
bcabcc50 603 { $$ = (OP*)NULL; }
55497cff 604 | ELSE mblock
3ad73efd
Z
605 {
606 ($2)->op_flags |= OPf_PARENS;
607 $$ = op_scope($2);
f05e27e5
DM
608 TOKEN_GETMAD($1,$$,'o');
609 }
417a992d 610 | ELSIF '(' mexpr ')' mblock else
53a7735b 611 { PL_parser->copline = (line_t)IVAL($1);
3ad73efd
Z
612 $$ = newCONDOP(0,
613 newSTATEOP(OPf_SPECIAL,NULL,$3),
614 op_scope($5), $6);
615 PL_hints |= HINT_BLOCK_SCOPE;
f05e27e5
DM
616 TOKEN_GETMAD($1,$$,'I');
617 TOKEN_GETMAD($2,$$,'(');
618 TOKEN_GETMAD($4,$$,')');
619 }
79072805
LW
620 ;
621
891be019 622/* Continue blocks */
79072805 623cont : /* NULL */
bcabcc50 624 { $$ = (OP*)NULL; }
79072805 625 | CONTINUE block
3ad73efd
Z
626 {
627 $$ = op_scope($2);
f05e27e5
DM
628 TOKEN_GETMAD($1,$$,'o');
629 }
79072805
LW
630 ;
631
a034e688
DM
632/* determine whether there are any new my declarations */
633mintro : /* NULL */
634 { $$ = (PL_min_intro_pending &&
635 PL_max_intro_pending >= PL_min_intro_pending);
636 intro_my(); }
637
891be019 638/* Normal expression */
8d063cd8 639nexpr : /* NULL */
bcabcc50 640 { $$ = (OP*)NULL; }
8d063cd8
LW
641 | sideff
642 ;
643
891be019 644/* Boolean expression */
8d063cd8 645texpr : /* NULL means true */
f05e27e5
DM
646 { YYSTYPE tmplval;
647 (void)scan_num("1", &tmplval);
648 $$ = tmplval.opval; }
8d063cd8
LW
649 | expr
650 ;
651
891be019 652/* Inverted boolean expression */
55497cff
PP
653iexpr : expr
654 { $$ = invert(scalar($1)); }
655 ;
656
891be019 657/* Expression with its own lexical scope */
55497cff 658mexpr : expr
bbce6d69
PP
659 { $$ = $1; intro_my(); }
660 ;
661
662mnexpr : nexpr
663 { $$ = $1; intro_my(); }
55497cff
PP
664 ;
665
55497cff 666miexpr : iexpr
bbce6d69 667 { $$ = $1; intro_my(); }
55497cff
PP
668 ;
669
44a8e56a 670formname: WORD { $$ = $1; }
bcabcc50 671 | /* NULL */ { $$ = (OP*)NULL; }
8d063cd8
LW
672 ;
673
fa83b5b6 674startsub: /* NULL */ /* start a regular subroutine scope */
a8ff2fa6
DM
675 { $$ = start_subparse(FALSE, 0);
676 SAVEFREESV(PL_compcv); }
f05e27e5 677
28757baa
PP
678 ;
679
680startanonsub: /* NULL */ /* start an anonymous subroutine scope */
a8ff2fa6
DM
681 { $$ = start_subparse(FALSE, CVf_ANON);
682 SAVEFREESV(PL_compcv); }
28757baa
PP
683 ;
684
44a8e56a 685startformsub: /* NULL */ /* start a format subroutine scope */
a8ff2fa6
DM
686 { $$ = start_subparse(TRUE, 0);
687 SAVEFREESV(PL_compcv); }
44a8e56a
PP
688 ;
689
891be019 690/* Name of a subroutine - must be a bareword, could be special */
50278755 691subname : WORD
4210d3f1 692 | PRIVATEREF
a0d0e21e
LW
693 ;
694
891be019 695/* Subroutine prototype */
4633a7c4 696proto : /* NULL */
bcabcc50 697 { $$ = (OP*)NULL; }
4633a7c4
LW
698 | THING
699 ;
28757baa 700
891be019 701/* Optional list of subroutine attributes */
09bef843 702subattrlist: /* NULL */
bcabcc50 703 { $$ = (OP*)NULL; }
09bef843 704 | COLONATTR THING
f05e27e5
DM
705 { $$ = $2;
706 TOKEN_GETMAD($1,$$,':');
707 }
09bef843 708 | COLONATTR
f05e27e5
DM
709 { $$ = IF_MAD(
710 newOP(OP_NULL, 0),
bcabcc50 711 (OP*)NULL
f05e27e5
DM
712 );
713 TOKEN_GETMAD($1,$$,':');
714 }
09bef843
SB
715 ;
716
891be019 717/* List of attributes for a "my" variable declaration */
09bef843 718myattrlist: COLONATTR THING
f05e27e5
DM
719 { $$ = $2;
720 TOKEN_GETMAD($1,$$,':');
721 }
09bef843 722 | COLONATTR
f05e27e5
DM
723 { $$ = IF_MAD(
724 newOP(OP_NULL, 0),
bcabcc50 725 (OP*)NULL
f05e27e5
DM
726 );
727 TOKEN_GETMAD($1,$$,':');
728 }
09bef843
SB
729 ;
730
30d9c59b
Z
731/* Optional subroutine signature */
732subsignature: /* NULL */ { $$ = (OP*)NULL; }
733 | '('
734 {
735 if (!FEATURE_SIGNATURES_IS_ENABLED)
736 Perl_croak(aTHX_ "Experimental "
737 "subroutine signatures not enabled");
738 Perl_ck_warner_d(aTHX_
739 packWARN(WARN_EXPERIMENTAL__SIGNATURES),
740 "The signatures feature is experimental");
741 $<opval>$ = parse_subsignature();
742 }
743 ')'
744 {
745 $$ = op_append_list(OP_LINESEQ, $<opval>2,
746 newSTATEOP(0, NULL, sawparens(newNULLLIST())));
747 PL_parser->expect = XBLOCK;
748 }
749 ;
750
751/* Subroutine body - block with optional signature */
752realsubbody: remember subsignature '{' stmtseq '}'
753 {
754 if (PL_parser->copline > (line_t)IVAL($3))
755 PL_parser->copline = (line_t)IVAL($3);
756 $$ = block_end($1,
757 op_append_list(OP_LINESEQ, $2, $4));
758 TOKEN_GETMAD($3,$$,'{');
759 TOKEN_GETMAD($5,$$,'}');
760 }
761 ;
762
763/* Optional subroutine body, for named subroutine declaration */
764optsubbody: realsubbody { $$ = $1; }
f05e27e5
DM
765 | ';' { $$ = IF_MAD(
766 newOP(OP_NULL,0),
bcabcc50 767 (OP*)NULL
f05e27e5 768 );
53a7735b 769 PL_parser->expect = XSTATE;
f05e27e5
DM
770 TOKEN_GETMAD($1,$$,';');
771 }
8d063cd8
LW
772 ;
773
891be019 774/* Ordinary expressions; logical combinations */
a0d0e21e 775expr : expr ANDOP expr
f05e27e5
DM
776 { $$ = newLOGOP(OP_AND, 0, $1, $3);
777 TOKEN_GETMAD($2,$$,'o');
778 }
a0d0e21e 779 | expr OROP expr
f05e27e5
DM
780 { $$ = newLOGOP(IVAL($2), 0, $1, $3);
781 TOKEN_GETMAD($2,$$,'o');
782 }
c963b151 783 | expr DOROP expr
f05e27e5
DM
784 { $$ = newLOGOP(OP_DOR, 0, $1, $3);
785 TOKEN_GETMAD($2,$$,'o');
786 }
09b1cffe 787 | listexpr %prec PREC_LOW
a0d0e21e
LW
788 ;
789
891be019 790/* Expressions are a list of terms joined by commas */
09b1cffe 791listexpr: listexpr ','
f05e27e5
DM
792 {
793#ifdef MAD
794 OP* op = newNULLLIST();
795 token_getmad($2,op,',');
2fcb4757 796 $$ = op_append_elem(OP_LIST, $1, op);
f05e27e5
DM
797#else
798 $$ = $1;
799#endif
800 }
09b1cffe 801 | listexpr ',' term
f05e27e5 802 {
29522234 803 OP* term = $3;
f05e27e5 804 DO_MAD(
29522234
DM
805 term = newUNOP(OP_NULL, 0, term);
806 token_getmad($2,term,',');
f05e27e5 807 )
2fcb4757 808 $$ = op_append_elem(OP_LIST, $1, term);
f05e27e5 809 }
fad39ff1 810 | term %prec PREC_LOW
8d063cd8
LW
811 ;
812
891be019 813/* List operators */
09b1cffe 814listop : LSTOP indirob listexpr /* map {...} @args or print $fh @args */
f05e27e5 815 { $$ = convert(IVAL($1), OPf_STACKED,
2fcb4757 816 op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$2), $3) );
f05e27e5
DM
817 TOKEN_GETMAD($1,$$,'o');
818 }
891be019 819 | FUNC '(' indirob expr ')' /* print ($fh @args */
f05e27e5 820 { $$ = convert(IVAL($1), OPf_STACKED,
2fcb4757 821 op_prepend_elem(OP_LIST, newGVREF(IVAL($1),$3), $4) );
f05e27e5
DM
822 TOKEN_GETMAD($1,$$,'o');
823 TOKEN_GETMAD($2,$$,'(');
824 TOKEN_GETMAD($5,$$,')');
825 }
417a992d 826 | term ARROW method '(' optexpr ')' /* $foo->bar(list) */
4633a7c4 827 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
2fcb4757
Z
828 op_append_elem(OP_LIST,
829 op_prepend_elem(OP_LIST, scalar($1), $5),
f05e27e5
DM
830 newUNOP(OP_METHOD, 0, $3)));
831 TOKEN_GETMAD($2,$$,'A');
832 TOKEN_GETMAD($4,$$,'(');
833 TOKEN_GETMAD($6,$$,')');
834 }
891be019 835 | term ARROW method /* $foo->bar */
b1524f17 836 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
2fcb4757 837 op_append_elem(OP_LIST, scalar($1),
f05e27e5
DM
838 newUNOP(OP_METHOD, 0, $3)));
839 TOKEN_GETMAD($2,$$,'A');
840 }
09b1cffe 841 | METHOD indirob optlistexpr /* new Class @args */
4633a7c4 842 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
2fcb4757
Z
843 op_append_elem(OP_LIST,
844 op_prepend_elem(OP_LIST, $2, $3),
f05e27e5
DM
845 newUNOP(OP_METHOD, 0, $1)));
846 }
09b1cffe 847 | FUNCMETH indirob '(' optexpr ')' /* method $object (@args) */
4633a7c4 848 { $$ = convert(OP_ENTERSUB, OPf_STACKED,
2fcb4757
Z
849 op_append_elem(OP_LIST,
850 op_prepend_elem(OP_LIST, $2, $4),
f05e27e5
DM
851 newUNOP(OP_METHOD, 0, $1)));
852 TOKEN_GETMAD($3,$$,'(');
853 TOKEN_GETMAD($5,$$,')');
854 }
09b1cffe 855 | LSTOP optlistexpr /* print @args */
f05e27e5
DM
856 { $$ = convert(IVAL($1), 0, $2);
857 TOKEN_GETMAD($1,$$,'o');
858 }
09b1cffe 859 | FUNC '(' optexpr ')' /* print (@args) */
f05e27e5
DM
860 { $$ = convert(IVAL($1), 0, $3);
861 TOKEN_GETMAD($1,$$,'o');
862 TOKEN_GETMAD($2,$$,'(');
863 TOKEN_GETMAD($4,$$,')');
864 }
718a7425 865 | LSTOPSUB startanonsub block /* sub f(&@); f { foo } ... */
5a5094bd 866 { SvREFCNT_inc_simple_void(PL_compcv);
bcabcc50 867 $<opval>$ = newANONATTRSUB($2, 0, (OP*)NULL, $3); }
09b1cffe 868 optlistexpr %prec LSTOP /* ... @bar */
4633a7c4 869 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757
Z
870 op_append_elem(OP_LIST,
871 op_prepend_elem(OP_LIST, $<opval>4, $5), $1));
f05e27e5 872 }
a687059c
LW
873 ;
874
891be019 875/* Names of methods. May use $object->$methodname */
a0d0e21e
LW
876method : METHOD
877 | scalar
878 ;
879
891be019 880/* Some kind of subscripted expression */
89f35911 881subscripted: gelem '{' expr ';' '}' /* *main::{something} */
891be019
SC
882 /* In this and all the hash accessors, ';' is
883 * provided by the tokeniser */
264e1af3 884 { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3));
53a7735b 885 PL_parser->expect = XOPERATOR;
f05e27e5
DM
886 TOKEN_GETMAD($2,$$,'{');
887 TOKEN_GETMAD($4,$$,';');
888 TOKEN_GETMAD($5,$$,'}');
889 }
891be019 890 | scalar '[' expr ']' /* $array[$element] */
f05e27e5
DM
891 { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3));
892 TOKEN_GETMAD($2,$$,'[');
893 TOKEN_GETMAD($4,$$,']');
894 }
891be019 895 | term ARROW '[' expr ']' /* somearef->[$element] */
fad39ff1
SM
896 { $$ = newBINOP(OP_AELEM, 0,
897 ref(newAVREF($1),OP_RV2AV),
f05e27e5
DM
898 scalar($4));
899 TOKEN_GETMAD($2,$$,'a');
900 TOKEN_GETMAD($3,$$,'[');
901 TOKEN_GETMAD($5,$$,']');
902 }
891be019 903 | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */
fad39ff1
SM
904 { $$ = newBINOP(OP_AELEM, 0,
905 ref(newAVREF($1),OP_RV2AV),
f05e27e5
DM
906 scalar($3));
907 TOKEN_GETMAD($2,$$,'[');
908 TOKEN_GETMAD($4,$$,']');
909 }
5a63ceef 910 | scalar '{' expr ';' '}' /* $foo{bar();} */
fad39ff1 911 { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3));
53a7735b 912 PL_parser->expect = XOPERATOR;
f05e27e5
DM
913 TOKEN_GETMAD($2,$$,'{');
914 TOKEN_GETMAD($4,$$,';');
915 TOKEN_GETMAD($5,$$,'}');
916 }
891be019 917 | term ARROW '{' expr ';' '}' /* somehref->{bar();} */
fad39ff1
SM
918 { $$ = newBINOP(OP_HELEM, 0,
919 ref(newHVREF($1),OP_RV2HV),
920 jmaybe($4));
53a7735b 921 PL_parser->expect = XOPERATOR;
f05e27e5
DM
922 TOKEN_GETMAD($2,$$,'a');
923 TOKEN_GETMAD($3,$$,'{');
924 TOKEN_GETMAD($5,$$,';');
925 TOKEN_GETMAD($6,$$,'}');
926 }
891be019 927 | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */
fad39ff1
SM
928 { $$ = newBINOP(OP_HELEM, 0,
929 ref(newHVREF($1),OP_RV2HV),
930 jmaybe($3));
53a7735b 931 PL_parser->expect = XOPERATOR;
f05e27e5
DM
932 TOKEN_GETMAD($2,$$,'{');
933 TOKEN_GETMAD($4,$$,';');
934 TOKEN_GETMAD($5,$$,'}');
935 }
891be019 936 | term ARROW '(' ')' /* $subref->() */
fad39ff1 937 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
f05e27e5
DM
938 newCVREF(0, scalar($1)));
939 TOKEN_GETMAD($2,$$,'a');
940 TOKEN_GETMAD($3,$$,'(');
941 TOKEN_GETMAD($4,$$,')');
942 }
891be019 943 | term ARROW '(' expr ')' /* $subref->(@args) */
fad39ff1 944 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757 945 op_append_elem(OP_LIST, $4,
f05e27e5
DM
946 newCVREF(0, scalar($1))));
947 TOKEN_GETMAD($2,$$,'a');
948 TOKEN_GETMAD($3,$$,'(');
949 TOKEN_GETMAD($5,$$,')');
950 }
fad39ff1 951
417a992d 952 | subscripted '(' expr ')' /* $foo->{bar}->(@args) */
fad39ff1 953 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757 954 op_append_elem(OP_LIST, $3,
f05e27e5
DM
955 newCVREF(0, scalar($1))));
956 TOKEN_GETMAD($2,$$,'(');
957 TOKEN_GETMAD($4,$$,')');
958 }
417a992d 959 | subscripted '(' ')' /* $foo->{bar}->() */
fad39ff1 960 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
f05e27e5
DM
961 newCVREF(0, scalar($1)));
962 TOKEN_GETMAD($2,$$,'(');
963 TOKEN_GETMAD($3,$$,')');
964 }
9a9798c2 965 | '(' expr ')' '[' expr ']' /* list slice */
f05e27e5
DM
966 { $$ = newSLICEOP(0, $5, $2);
967 TOKEN_GETMAD($1,$$,'(');
968 TOKEN_GETMAD($3,$$,')');
969 TOKEN_GETMAD($4,$$,'[');
970 TOKEN_GETMAD($6,$$,']');
971 }
ea25a9b2
Z
972 | QWLIST '[' expr ']' /* list literal slice */
973 { $$ = newSLICEOP(0, $3, $1);
974 TOKEN_GETMAD($2,$$,'[');
975 TOKEN_GETMAD($4,$$,']');
976 }
9a9798c2 977 | '(' ')' '[' expr ']' /* empty list slice! */
bcabcc50 978 { $$ = newSLICEOP(0, $4, (OP*)NULL);
f05e27e5
DM
979 TOKEN_GETMAD($1,$$,'(');
980 TOKEN_GETMAD($2,$$,')');
981 TOKEN_GETMAD($3,$$,'[');
982 TOKEN_GETMAD($5,$$,']');
983 }
891be019 984 ;
fad39ff1 985
891be019 986/* Binary operators between terms */
f05e27e5
DM
987termbinop: term ASSIGNOP term /* $x = $y */
988 { $$ = newASSIGNOP(OPf_STACKED, $1, IVAL($2), $3);
989 TOKEN_GETMAD($2,$$,'o');
990 }
891be019 991 | term POWOP term /* $x ** $y */
f05e27e5
DM
992 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
993 TOKEN_GETMAD($2,$$,'o');
994 }
891be019 995 | term MULOP term /* $x * $y, $x x $y */
f05e27e5 996 { if (IVAL($2) != OP_REPEAT)
79072805 997 scalar($1);
f05e27e5
DM
998 $$ = newBINOP(IVAL($2), 0, $1, scalar($3));
999 TOKEN_GETMAD($2,$$,'o');
1000 }
891be019 1001 | term ADDOP term /* $x + $y */
f05e27e5
DM
1002 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1003 TOKEN_GETMAD($2,$$,'o');
1004 }
891be019 1005 | term SHIFTOP term /* $x >> $y, $x << $y */
f05e27e5
DM
1006 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1007 TOKEN_GETMAD($2,$$,'o');
1008 }
891be019 1009 | term RELOP term /* $x > $y, etc. */
f05e27e5
DM
1010 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1011 TOKEN_GETMAD($2,$$,'o');
1012 }
891be019 1013 | term EQOP term /* $x == $y, $x eq $y */
f05e27e5
DM
1014 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1015 TOKEN_GETMAD($2,$$,'o');
1016 }
891be019 1017 | term BITANDOP term /* $x & $y */
f05e27e5
DM
1018 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1019 TOKEN_GETMAD($2,$$,'o');
1020 }
891be019 1021 | term BITOROP term /* $x | $y */
f05e27e5
DM
1022 { $$ = newBINOP(IVAL($2), 0, scalar($1), scalar($3));
1023 TOKEN_GETMAD($2,$$,'o');
1024 }
891be019 1025 | term DOTDOT term /* $x..$y, $x...$y */
f05e27e5
DM
1026 {
1027 $$ = newRANGE(IVAL($2), scalar($1), scalar($3));
035e2bcc 1028 DO_MAD({
f05e27e5
DM
1029 UNOP *op;
1030 op = (UNOP*)$$;
1031 op = (UNOP*)op->op_first; /* get to flop */
1032 op = (UNOP*)op->op_first; /* get to flip */
1033 op = (UNOP*)op->op_first; /* get to range */
1034 token_getmad($2,(OP*)op,'o');
04ff073f 1035 });
f05e27e5 1036 }
891be019 1037 | term ANDAND term /* $x && $y */
f05e27e5
DM
1038 { $$ = newLOGOP(OP_AND, 0, $1, $3);
1039 TOKEN_GETMAD($2,$$,'o');
1040 }
891be019 1041 | term OROR term /* $x || $y */
f05e27e5
DM
1042 { $$ = newLOGOP(OP_OR, 0, $1, $3);
1043 TOKEN_GETMAD($2,$$,'o');
1044 }
c963b151 1045 | term DORDOR term /* $x // $y */
f05e27e5
DM
1046 { $$ = newLOGOP(OP_DOR, 0, $1, $3);
1047 TOKEN_GETMAD($2,$$,'o');
1048 }
891be019 1049 | term MATCHOP term /* $x =~ /$y/ */
f05e27e5
DM
1050 { $$ = bind_match(IVAL($2), $1, $3);
1051 TOKEN_GETMAD($2,
1052 ($$->op_type == OP_NOT
1053 ? ((UNOP*)$$)->op_first : $$),
1054 '~');
1055 }
891be019 1056 ;
8d063cd8 1057
891be019
SC
1058/* Unary operators and terms */
1059termunop : '-' term %prec UMINUS /* -$x */
f05e27e5
DM
1060 { $$ = newUNOP(OP_NEGATE, 0, scalar($2));
1061 TOKEN_GETMAD($1,$$,'o');
1062 }
891be019 1063 | '+' term %prec UMINUS /* +$x */
f05e27e5
DM
1064 { $$ = IF_MAD(
1065 newUNOP(OP_NULL, 0, $2),
1066 $2
1067 );
1068 TOKEN_GETMAD($1,$$,'+');
1069 }
891be019 1070 | '!' term /* !$x */
f05e27e5
DM
1071 { $$ = newUNOP(OP_NOT, 0, scalar($2));
1072 TOKEN_GETMAD($1,$$,'o');
1073 }
891be019 1074 | '~' term /* ~$x */
f05e27e5
DM
1075 { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));
1076 TOKEN_GETMAD($1,$$,'o');
1077 }
891be019 1078 | term POSTINC /* $x++ */
79072805 1079 { $$ = newUNOP(OP_POSTINC, 0,
3ad73efd 1080 op_lvalue(scalar($1), OP_POSTINC));
f05e27e5
DM
1081 TOKEN_GETMAD($2,$$,'o');
1082 }
891be019 1083 | term POSTDEC /* $x-- */
79072805 1084 { $$ = newUNOP(OP_POSTDEC, 0,
3ad73efd 1085 op_lvalue(scalar($1), OP_POSTDEC));
f05e27e5
DM
1086 TOKEN_GETMAD($2,$$,'o');
1087 }
cc624add
FC
1088 | term POSTJOIN /* implicit join after interpolated ->@ */
1089 { $$ = convert(OP_JOIN, 0,
1090 op_append_elem(
1091 OP_LIST,
1092 newSVREF(scalar(
1093 newSVOP(OP_CONST,0,
1094 newSVpvs("\""))
1095 )),
1096 $1
1097 ));
1098 TOKEN_GETMAD($2,$$,'o');
1099 }
891be019 1100 | PREINC term /* ++$x */
79072805 1101 { $$ = newUNOP(OP_PREINC, 0,
3ad73efd 1102 op_lvalue(scalar($2), OP_PREINC));
f05e27e5
DM
1103 TOKEN_GETMAD($1,$$,'o');
1104 }
891be019 1105 | PREDEC term /* --$x */
79072805 1106 { $$ = newUNOP(OP_PREDEC, 0,
3ad73efd 1107 op_lvalue(scalar($2), OP_PREDEC));
f05e27e5
DM
1108 TOKEN_GETMAD($1,$$,'o');
1109 }
891be019
SC
1110
1111 ;
1112
1113/* Constructors for anonymous data */
1114anonymous: '[' expr ']'
f05e27e5
DM
1115 { $$ = newANONLIST($2);
1116 TOKEN_GETMAD($1,$$,'[');
1117 TOKEN_GETMAD($3,$$,']');
1118 }
891be019 1119 | '[' ']'
bcabcc50 1120 { $$ = newANONLIST((OP*)NULL);
f05e27e5
DM
1121 TOKEN_GETMAD($1,$$,'[');
1122 TOKEN_GETMAD($2,$$,']');
1123 }
891be019 1124 | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */
f05e27e5
DM
1125 { $$ = newANONHASH($2);
1126 TOKEN_GETMAD($1,$$,'{');
1127 TOKEN_GETMAD($3,$$,';');
1128 TOKEN_GETMAD($4,$$,'}');
1129 }
891be019 1130 | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */
bcabcc50 1131 { $$ = newANONHASH((OP*)NULL);
f05e27e5
DM
1132 TOKEN_GETMAD($1,$$,'{');
1133 TOKEN_GETMAD($2,$$,';');
1134 TOKEN_GETMAD($3,$$,'}');
1135 }
30d9c59b 1136 | ANONSUB startanonsub proto subattrlist realsubbody %prec '('
5a5094bd 1137 { SvREFCNT_inc_simple_void(PL_compcv);
718a7425 1138 $$ = newANONATTRSUB($2, $3, $4, $5);
f05e27e5 1139 TOKEN_GETMAD($1,$$,'o');
718a7425
DM
1140 OP_GETMAD($3,$$,'s');
1141 OP_GETMAD($4,$$,'a');
f05e27e5 1142 }
891be019
SC
1143
1144 ;
1145
1146/* Things called with "do" */
1147termdo : DO term %prec UNIOP /* do $filename */
123d08c9 1148 { $$ = dofile($2, IVAL($1));
f05e27e5
DM
1149 TOKEN_GETMAD($1,$$,'o');
1150 }
891be019 1151 | DO block %prec '(' /* do { code */
3ad73efd 1152 { $$ = newUNOP(OP_NULL, OPf_SPECIAL, op_scope($2));
f05e27e5
DM
1153 TOKEN_GETMAD($1,$$,'D');
1154 }
891be019
SC
1155 ;
1156
1157term : termbinop
1158 | termunop
1159 | anonymous
1160 | termdo
e9bdcc27 1161 | term '?' term ':' term
f05e27e5
DM
1162 { $$ = newCONDOP(0, $1, $3, $5);
1163 TOKEN_GETMAD($2,$$,'?');
1164 TOKEN_GETMAD($4,$$,':');
1165 }
891be019 1166 | REFGEN term /* \$x, \@y, \%z */
3ad73efd 1167 { $$ = newUNOP(OP_REFGEN, 0, op_lvalue($2,OP_REFGEN));
f05e27e5
DM
1168 TOKEN_GETMAD($1,$$,'o');
1169 }
09bef843
SB
1170 | myattrterm %prec UNIOP
1171 { $$ = $1; }
1172 | LOCAL term %prec UNIOP
f05e27e5 1173 { $$ = localize($2,IVAL($1));
dde83331 1174 TOKEN_GETMAD($1,$$,'k');
f05e27e5 1175 }
a0d0e21e 1176 | '(' expr ')'
f05e27e5
DM
1177 { $$ = sawparens(IF_MAD(newUNOP(OP_NULL,0,$2), $2));
1178 TOKEN_GETMAD($1,$$,'(');
1179 TOKEN_GETMAD($3,$$,')');
1180 }
ea25a9b2
Z
1181 | QWLIST
1182 { $$ = IF_MAD(newUNOP(OP_NULL,0,$1), $1); }
8d063cd8 1183 | '(' ')'
f05e27e5
DM
1184 { $$ = sawparens(newNULLLIST());
1185 TOKEN_GETMAD($1,$$,'(');
1186 TOKEN_GETMAD($2,$$,')');
1187 }
79072805 1188 | scalar %prec '('
8d063cd8 1189 { $$ = $1; }
79072805 1190 | star %prec '('
8d063cd8 1191 { $$ = $1; }
79072805 1192 | hsh %prec '('
8d063cd8 1193 { $$ = $1; }
79072805 1194 | ary %prec '('
8d063cd8 1195 { $$ = $1; }
891be019 1196 | arylen %prec '(' /* $#x, $#{ something } */
79072805 1197 { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));}
fad39ff1
SM
1198 | subscripted
1199 { $$ = $1; }
89f35911 1200 | sliceme '[' expr ']' /* array slice */
2fcb4757 1201 { $$ = op_prepend_elem(OP_ASLICE,
79072805 1202 newOP(OP_PUSHMARK, 0),
79072805
LW
1203 newLISTOP(OP_ASLICE, 0,
1204 list($3),
f05e27e5 1205 ref($1, OP_ASLICE)));
429a2555
FC
1206 if ($$ && $1)
1207 $$->op_private |=
1208 $1->op_private & OPpSLICEWARNING;
f05e27e5
DM
1209 TOKEN_GETMAD($2,$$,'[');
1210 TOKEN_GETMAD($4,$$,']');
1211 }
76eba8ab 1212 | kvslice '[' expr ']' /* array key/value slice */
6dd3e0f2
RZ
1213 { $$ = op_prepend_elem(OP_KVASLICE,
1214 newOP(OP_PUSHMARK, 0),
1215 newLISTOP(OP_KVASLICE, 0,
1216 list($3),
1217 ref(oopsAV($1), OP_KVASLICE)));
95a31aad
FC
1218 if ($$ && $1)
1219 $$->op_private |=
1220 $1->op_private & OPpSLICEWARNING;
6dd3e0f2
RZ
1221 TOKEN_GETMAD($2,$$,'[');
1222 TOKEN_GETMAD($4,$$,']');
1223 }
89f35911 1224 | sliceme '{' expr ';' '}' /* @hash{@keys} */
2fcb4757 1225 { $$ = op_prepend_elem(OP_HSLICE,
79072805 1226 newOP(OP_PUSHMARK, 0),
79072805
LW
1227 newLISTOP(OP_HSLICE, 0,
1228 list($3),
a0d0e21e 1229 ref(oopsHV($1), OP_HSLICE)));
429a2555
FC
1230 if ($$ && $1)
1231 $$->op_private |=
1232 $1->op_private & OPpSLICEWARNING;
53a7735b 1233 PL_parser->expect = XOPERATOR;
f05e27e5
DM
1234 TOKEN_GETMAD($2,$$,'{');
1235 TOKEN_GETMAD($4,$$,';');
1236 TOKEN_GETMAD($5,$$,'}');
1237 }
76eba8ab 1238 | kvslice '{' expr ';' '}' /* %hash{@keys} */
5cae3edb
RZ
1239 { $$ = op_prepend_elem(OP_KVHSLICE,
1240 newOP(OP_PUSHMARK, 0),
1241 newLISTOP(OP_KVHSLICE, 0,
1242 list($3),
1243 ref($1, OP_KVHSLICE)));
95a31aad
FC
1244 if ($$ && $1)
1245 $$->op_private |=
1246 $1->op_private & OPpSLICEWARNING;
5cae3edb
RZ
1247 PL_parser->expect = XOPERATOR;
1248 TOKEN_GETMAD($2,$$,'{');
1249 TOKEN_GETMAD($4,$$,';');
1250 TOKEN_GETMAD($5,$$,'}');
1251 }
79072805
LW
1252 | THING %prec '('
1253 { $$ = $1; }
891be019 1254 | amper /* &foo; */
c07a80fd 1255 { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); }
fb602e32 1256 | amper '(' ')' /* &foo() or foo() */
f05e27e5
DM
1257 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1));
1258 TOKEN_GETMAD($2,$$,'(');
1259 TOKEN_GETMAD($3,$$,')');
1260 }
fb602e32 1261 | amper '(' expr ')' /* &foo(@args) or foo(@args) */
f05e27e5
DM
1262 {
1263 $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757 1264 op_append_elem(OP_LIST, $3, scalar($1)));
035e2bcc 1265 DO_MAD({
f05e27e5
DM
1266 OP* op = $$;
1267 if (op->op_type == OP_CONST) { /* defeat const fold */
1268 op = (OP*)op->op_madprop->mad_val;
1269 }
1270 token_getmad($2,op,'(');
1271 token_getmad($4,op,')');
04ff073f 1272 });
f05e27e5 1273 }
fb602e32 1274 | NOAMP subname optlistexpr /* foo @args (no parens) */
a0d0e21e 1275 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757 1276 op_append_elem(OP_LIST, $3, scalar($2)));
f05e27e5
DM
1277 TOKEN_GETMAD($1,$$,'o');
1278 }
89f35911
FC
1279 | term ARROW '$' '*'
1280 { $$ = newSVREF($1);
1281 TOKEN_GETMAD($3,$$,'$');
1282 }
1283 | term ARROW '@' '*'
1284 { $$ = newAVREF($1);
1285 TOKEN_GETMAD($3,$$,'@');
1286 }
1287 | term ARROW '%' '*'
1288 { $$ = newHVREF($1);
1289 TOKEN_GETMAD($3,$$,'%');
1290 }
1291 | term ARROW '&' '*'
1292 { $$ = newUNOP(OP_ENTERSUB, 0,
1293 scalar(newCVREF(IVAL($3),$1)));
1294 TOKEN_GETMAD($3,$$,'&');
1295 }
1296 | term ARROW '*' '*' %prec '('
1297 { $$ = newGVREF(0,$1);
1298 TOKEN_GETMAD($3,$$,'*');
1299 }
891be019 1300 | LOOPEX /* loop exiting command (goto, last, dump, etc) */
f05e27e5
DM
1301 { $$ = newOP(IVAL($1), OPf_SPECIAL);
1302 PL_hints |= HINT_BLOCK_SCOPE;
1303 TOKEN_GETMAD($1,$$,'o');
1304 }
a0d0e21e 1305 | LOOPEX term
f05e27e5
DM
1306 { $$ = newLOOPEX(IVAL($1),$2);
1307 TOKEN_GETMAD($1,$$,'o');
1308 }
09b1cffe 1309 | NOTOP listexpr /* not $foo */
f05e27e5
DM
1310 { $$ = newUNOP(OP_NOT, 0, scalar($2));
1311 TOKEN_GETMAD($1,$$,'o');
1312 }
891be019 1313 | UNIOP /* Unary op, $_ implied */
f05e27e5
DM
1314 { $$ = newOP(IVAL($1), 0);
1315 TOKEN_GETMAD($1,$$,'o');
1316 }
1317 | UNIOP block /* eval { foo }* */
1318 { $$ = newUNOP(IVAL($1), 0, $2);
1319 TOKEN_GETMAD($1,$$,'o');
1320 }
891be019 1321 | UNIOP term /* Unary op */
f05e27e5
DM
1322 { $$ = newUNOP(IVAL($1), 0, $2);
1323 TOKEN_GETMAD($1,$$,'o');
1324 }
d2fdf8fd
RGS
1325 | REQUIRE /* require, $_ implied */
1326 { $$ = newOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0);
1327 TOKEN_GETMAD($1,$$,'o');
1328 }
1329 | REQUIRE term /* require Foo */
1330 { $$ = newUNOP(OP_REQUIRE, $1 ? OPf_SPECIAL : 0, $2);
1331 TOKEN_GETMAD($1,$$,'o');
1332 }
3cd0a11a
RGS
1333 | UNIOPSUB
1334 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); }
891be019 1335 | UNIOPSUB term /* Sub treated as unop */
4633a7c4 1336 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
2fcb4757 1337 op_append_elem(OP_LIST, $2, scalar($1))); }
891be019 1338 | FUNC0 /* Nullary operator */
f05e27e5
DM
1339 { $$ = newOP(IVAL($1), 0);
1340 TOKEN_GETMAD($1,$$,'o');
1341 }
ae986130 1342 | FUNC0 '(' ')'
f05e27e5
DM
1343 { $$ = newOP(IVAL($1), 0);
1344 TOKEN_GETMAD($1,$$,'o');
1345 TOKEN_GETMAD($2,$$,'(');
1346 TOKEN_GETMAD($3,$$,')');
1347 }
7eb971ee
FC
1348 | FUNC0OP /* Same as above, but op created in toke.c */
1349 { $$ = $1; }
1350 | FUNC0OP '(' ')'
1351 { $$ = $1;
1352 TOKEN_GETMAD($2,$$,'(');
1353 TOKEN_GETMAD($3,$$,')');
1354 }
891be019 1355 | FUNC0SUB /* Sub treated as nullop */
28757baa 1356 { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED,
4633a7c4 1357 scalar($1)); }
891be019 1358 | FUNC1 '(' ')' /* not () */
f05e27e5
DM
1359 { $$ = (IVAL($1) == OP_NOT)
1360 ? newUNOP(IVAL($1), 0, newSVOP(OP_CONST, 0, newSViv(0)))
1361 : newOP(IVAL($1), OPf_SPECIAL);
1362
1363 TOKEN_GETMAD($1,$$,'o');
1364 TOKEN_GETMAD($2,$$,'(');
1365 TOKEN_GETMAD($3,$$,')');
1366 }
891be019 1367 | FUNC1 '(' expr ')' /* not($foo) */
f05e27e5
DM
1368 { $$ = newUNOP(IVAL($1), 0, $3);
1369 TOKEN_GETMAD($1,$$,'o');
1370 TOKEN_GETMAD($2,$$,'(');
1371 TOKEN_GETMAD($4,$$,')');
1372 }
d63c20f2
DM
1373 | PMFUNC /* m//, s///, qr//, tr/// */
1374 {
1375 if ( $1->op_type != OP_TRANS
1376 && $1->op_type != OP_TRANSR
1377 && (((PMOP*)$1)->op_pmflags & PMf_HAS_CV))
1378 {
1379 $<ival>$ = start_subparse(FALSE, CVf_ANON);
1380 SAVEFREESV(PL_compcv);
1381 } else
1382 $<ival>$ = 0;
1383 }
1384 '(' listexpr ')'
1385 { $$ = pmruntime($1, $4, 1, $<ival>2);
1386 TOKEN_GETMAD($3,$$,'(');
1387 TOKEN_GETMAD($5,$$,')');
f05e27e5 1388 }
79072805 1389 | WORD
378cc40b 1390 | listop
be25f609 1391 | YADAYADA
1392 {
1393 $$ = newLISTOP(OP_DIE, 0, newOP(OP_PUSHMARK, 0),
1394 newSVOP(OP_CONST, 0, newSVpvs("Unimplemented")));
950f2ea2 1395 TOKEN_GETMAD($1,$$,'X');
be25f609 1396 }
88e1f1a2 1397 | PLUGEXPR
8d063cd8
LW
1398 ;
1399
891be019 1400/* "my" declarations, with optional attributes */
09bef843 1401myattrterm: MY myterm myattrlist
f05e27e5
DM
1402 { $$ = my_attrs($2,$3);
1403 DO_MAD(
1404 token_getmad($1,$$,'d');
1405 append_madprops($3->op_madprop, $$, 'a');
1406 $3->op_madprop = 0;
04ff073f 1407 );
f05e27e5 1408 }
09bef843 1409 | MY myterm
f05e27e5
DM
1410 { $$ = localize($2,IVAL($1));
1411 TOKEN_GETMAD($1,$$,'d');
1412 }
09bef843
SB
1413 ;
1414
891be019 1415/* Things that can be "my"'d */
09bef843 1416myterm : '(' expr ')'
f05e27e5
DM
1417 { $$ = sawparens($2);
1418 TOKEN_GETMAD($1,$$,'(');
1419 TOKEN_GETMAD($3,$$,')');
1420 }
09bef843 1421 | '(' ')'
f05e27e5
DM
1422 { $$ = sawparens(newNULLLIST());
1423 TOKEN_GETMAD($1,$$,'(');
1424 TOKEN_GETMAD($2,$$,')');
1425 }
09bef843
SB
1426 | scalar %prec '('
1427 { $$ = $1; }
1428 | hsh %prec '('
1429 { $$ = $1; }
1430 | ary %prec '('
1431 { $$ = $1; }
1432 ;
1433
891be019 1434/* Basic list expressions */
09b1cffe 1435optlistexpr: /* NULL */ %prec PREC_LOW
bcabcc50 1436 { $$ = (OP*)NULL; }
09b1cffe 1437 | listexpr %prec PREC_LOW
a0d0e21e
LW
1438 { $$ = $1; }
1439 ;
1440
09b1cffe 1441optexpr: /* NULL */
bcabcc50 1442 { $$ = (OP*)NULL; }
79072805
LW
1443 | expr
1444 { $$ = $1; }
1445 ;
1446
891be019
SC
1447/* A little bit of trickery to make "for my $foo (@bar)" actually be
1448 lexical */
55497cff 1449my_scalar: scalar
12bd6ede 1450 { PL_parser->in_my = 0; $$ = my($1); }
55497cff
PP
1451 ;
1452
79072805 1453amper : '&' indirob
f05e27e5
DM
1454 { $$ = newCVREF(IVAL($1),$2);
1455 TOKEN_GETMAD($1,$$,'&');
1456 }
a687059c
LW
1457 ;
1458
79072805 1459scalar : '$' indirob
f05e27e5
DM
1460 { $$ = newSVREF($2);
1461 TOKEN_GETMAD($1,$$,'$');
1462 }
a687059c
LW
1463 ;
1464
79072805 1465ary : '@' indirob
f05e27e5 1466 { $$ = newAVREF($2);
429a2555 1467 if ($$) $$->op_private |= IVAL($1);
f05e27e5
DM
1468 TOKEN_GETMAD($1,$$,'@');
1469 }
79072805
LW
1470 ;
1471
1472hsh : '%' indirob
f05e27e5 1473 { $$ = newHVREF($2);
95a31aad 1474 if ($$) $$->op_private |= IVAL($1);
f05e27e5
DM
1475 TOKEN_GETMAD($1,$$,'%');
1476 }
79072805
LW
1477 ;
1478
1479arylen : DOLSHARP indirob
f05e27e5
DM
1480 { $$ = newAVREF($2);
1481 TOKEN_GETMAD($1,$$,'l');
1482 }
ff25e5db
FC
1483 | term ARROW DOLSHARP '*'
1484 { $$ = newAVREF($1);
1485 TOKEN_GETMAD($3,$$,'l');
1486 }
79072805
LW
1487 ;
1488
1489star : '*' indirob
f05e27e5
DM
1490 { $$ = newGVREF(0,$2);
1491 TOKEN_GETMAD($1,$$,'*');
1492 }
79072805
LW
1493 ;
1494
89f35911
FC
1495sliceme : ary
1496 | term ARROW '@'
1497 { $$ = newAVREF($1);
1498 TOKEN_GETMAD($3,$$,'@');
1499 }
1500 ;
1501
76eba8ab
FC
1502kvslice : hsh
1503 | term ARROW '%'
1504 { $$ = newHVREF($1);
1505 TOKEN_GETMAD($3,$$,'@');
1506 }
1507 ;
1508
89f35911
FC
1509gelem : star
1510 | term ARROW '*'
1511 { $$ = newGVREF(0,$1);
1512 TOKEN_GETMAD($3,$$,'*');
1513 }
1514 ;
1515
891be019 1516/* Indirect objects */
79072805
LW
1517indirob : WORD
1518 { $$ = scalar($1); }
fad39ff1 1519 | scalar %prec PREC_LOW
f05e27e5 1520 { $$ = scalar($1); }
79072805 1521 | block
3ad73efd 1522 { $$ = op_scope($1); }
79072805 1523
93a17b20
LW
1524 | PRIVATEREF
1525 { $$ = $1; }
8d063cd8 1526 ;