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Generic file changes for MYMALLOC
[perl5.git] / toke.c
CommitLineData
a0d0e21e 1/* toke.c
a687059c 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
a687059c 4 *
d48672a2
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.
378cc40b 7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "It all comes from here, the stench and the peril." --Frodo
378cc40b
LW		 12 */
13
14#include "EXTERN.h"
15#include "perl.h"
378cc40b 16
a0d0e21e
LW		 17static void check_uni _((void));
18static void force_next _((I32 type));
89bfa8cd 19static char *force_version _((char *start));
a0d0e21e
LW		 20static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
21static SV *q _((SV *sv));
22static char *scan_const _((char *start));
23static char *scan_formline _((char *s));
24static char *scan_heredoc _((char *s));
8903cb82 25static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
26 I32 ck_uni));
a0d0e21e
LW		 27static char *scan_inputsymbol _((char *start));
28static char *scan_pat _((char *start));
29static char *scan_str _((char *start));
30static char *scan_subst _((char *start));
31static char *scan_trans _((char *start));
8903cb82 32static char *scan_word _((char *s, char *dest, STRLEN destlen,
33 int allow_package, STRLEN *slp));
a0d0e21e
LW		 34static char *skipspace _((char *s));
35static void checkcomma _((char *s, char *name, char *what));
36static void force_ident _((char *s, int kind));
37static void incline _((char *s));
38static int intuit_method _((char *s, GV *gv));
39static int intuit_more _((char *s));
40static I32 lop _((I32 f, expectation x, char *s));
41static void missingterm _((char *s));
42static void no_op _((char *what, char *s));
43static void set_csh _((void));
44static I32 sublex_done _((void));
55497cff 45static I32 sublex_push _((void));
a0d0e21e
LW		 46static I32 sublex_start _((void));
47#ifdef CRIPPLED_CC
48static int uni _((I32 f, char *s));
49#endif
fd049845 50static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
6d5fb7e3 51static void restore_rsfp _((void *f));
2f3197b3 52
fc36a67e 53static char ident_too_long[] = "Identifier too long";
8903cb82 54
fd049845 55static char *linestart; /* beg. of most recently read line */
56
bbce6d69 57static char pending_ident; /* pending identifier lookup */
58
55497cff 59static struct {
60 I32 super_state; /* lexer state to save */
61 I32 sub_inwhat; /* "lex_inwhat" to use */
62 OP *sub_op; /* "lex_op" to use */
63} sublex_info;
64
79072805
LW		 65/* The following are arranged oddly so that the guard on the switch statement
66 * can get by with a single comparison (if the compiler is smart enough).
67 */
68
fb73857a 69/* #define LEX_NOTPARSING 11 is done in perl.h. */
70
55497cff 71#define LEX_NORMAL 10
72#define LEX_INTERPNORMAL 9
73#define LEX_INTERPCASEMOD 8
74#define LEX_INTERPPUSH 7
75#define LEX_INTERPSTART 6
76#define LEX_INTERPEND 5
77#define LEX_INTERPENDMAYBE 4
78#define LEX_INTERPCONCAT 3
79#define LEX_INTERPCONST 2
80#define LEX_FORMLINE 1
81#define LEX_KNOWNEXT 0
79072805 82
395c3793
LW		 83#ifdef I_FCNTL
84#include <fcntl.h>
85#endif
fe14fcc3
LW		 86#ifdef I_SYS_FILE
87#include <sys/file.h>
88#endif
395c3793 89
a790bc05 90/* XXX If this causes problems, set i_unistd=undef in the hint file. */
91#ifdef I_UNISTD
92# include <unistd.h> /* Needed for execv() */
93#endif
94
95
79072805
LW		 96#ifdef ff_next
97#undef ff_next
d48672a2
LW		 98#endif
99
79072805 100#include "keywords.h"
fe14fcc3 101
ae986130
LW		 102#ifdef CLINE
103#undef CLINE
104#endif
79072805 105#define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
378cc40b 106
79072805
LW		 107#define TOKEN(retval) return (bufptr = s,(int)retval)
108#define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
a0d0e21e 109#define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
79072805 110#define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
a0d0e21e 111#define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
79072805
LW		 112#define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
113#define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
463ee0b2 114#define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
79072805
LW		 115#define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
116#define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
117#define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
a0d0e21e
LW		 118#define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
119#define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
120#define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
121#define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
79072805 122#define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
a0d0e21e
LW		 123#define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
124#define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
79072805
LW		 125#define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
126#define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
2f3197b3 127
a687059c
LW		 128/* This bit of chicanery makes a unary function followed by
129 * a parenthesis into a function with one argument, highest precedence.
130 */
2f3197b3 131#define UNI(f) return(yylval.ival = f, \
79072805 132 expect = XTERM, \
2f3197b3
LW		 133 bufptr = s, \
134 last_uni = oldbufptr, \
a0d0e21e 135 last_lop_op = f, \
a687059c
LW		 136 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
137
79072805
LW		 138#define UNIBRACK(f) return(yylval.ival = f, \
139 bufptr = s, \
140 last_uni = oldbufptr, \
141 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
142
9f68db38 143/* grandfather return to old style */
79072805
LW		 144#define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
145
a0d0e21e 146static int
8ac85365 147ao(int toketype)
a0d0e21e
LW		 148{
149 if (*bufptr == '=') {
150 bufptr++;
151 if (toketype == ANDAND)
152 yylval.ival = OP_ANDASSIGN;
153 else if (toketype == OROR)
154 yylval.ival = OP_ORASSIGN;
155 toketype = ASSIGNOP;
156 }
157 return toketype;
158}
159
8990e307 160static void
8ac85365 161no_op(char *what, char *s)
463ee0b2 162{
748a9306 163 char *oldbp = bufptr;
fd049845 164 bool is_first = (oldbufptr == linestart);
68dc0745 165
8990e307 166 bufptr = s;
46fc3d4c 167 yywarn(form("%s found where operator expected", what));
748a9306 168 if (is_first)
a0d0e21e 169 warn("\t(Missing semicolon on previous line?)\n");
748a9306
LW		 170 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
171 char *t;
172 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
173 if (t < bufptr && isSPACE(*t))
174 warn("\t(Do you need to predeclare %.*s?)\n",
175 t - oldoldbufptr, oldoldbufptr);
176
177 }
178 else
179 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
180 bufptr = oldbp;
8990e307
LW		 181}
182
183static void
8ac85365 184missingterm(char *s)
8990e307
LW		 185{
186 char tmpbuf[3];
187 char q;
188 if (s) {
189 char *nl = strrchr(s,'\n');
190 if (nl)
191 *nl = '\0';
192 }
193 else if (multi_close < 32 || multi_close == 127) {
194 *tmpbuf = '^';
bbce6d69 195 tmpbuf[1] = toCTRL(multi_close);
8990e307
LW		 196 s = "\\n";
197 tmpbuf[2] = '\0';
198 s = tmpbuf;
199 }
200 else {
201 *tmpbuf = multi_close;
202 tmpbuf[1] = '\0';
203 s = tmpbuf;
204 }
205 q = strchr(s,'"') ? '\'' : '"';
206 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
463ee0b2 207}
79072805
LW		 208
209void
8ac85365 210deprecate(char *s)
a0d0e21e
LW		 211{
212 if (dowarn)
213 warn("Use of %s is deprecated", s);
214}
215
216static void
8ac85365 217depcom(void)
a0d0e21e
LW		 218{
219 deprecate("comma-less variable list");
220}
221
222void
8ac85365 223lex_start(SV *line)
79072805 224{
0f15f207 225 dTHR;
8990e307
LW		 226 char *s;
227 STRLEN len;
228
55497cff 229 SAVEI32(lex_dojoin);
230 SAVEI32(lex_brackets);
231 SAVEI32(lex_fakebrack);
232 SAVEI32(lex_casemods);
233 SAVEI32(lex_starts);
234 SAVEI32(lex_state);
a0d0e21e 235 SAVESPTR(lex_inpat);
55497cff 236 SAVEI32(lex_inwhat);
237 SAVEI16(curcop->cop_line);
85e6fe83
LW		 238 SAVEPPTR(bufptr);
239 SAVEPPTR(bufend);
240 SAVEPPTR(oldbufptr);
241 SAVEPPTR(oldoldbufptr);
fd049845 242 SAVEPPTR(linestart);
463ee0b2 243 SAVESPTR(linestr);
85e6fe83 244 SAVEPPTR(lex_brackstack);
a0d0e21e 245 SAVEPPTR(lex_casestack);
6d5fb7e3 246 SAVEDESTRUCTOR(restore_rsfp, rsfp);
463ee0b2 247
79072805
LW		 248 lex_state = LEX_NORMAL;
249 lex_defer = 0;
8990e307 250 expect = XSTATE;
79072805
LW		 251 lex_brackets = 0;
252 lex_fakebrack = 0;
8990e307 253 New(899, lex_brackstack, 120, char);
a0d0e21e 254 New(899, lex_casestack, 12, char);
8990e307 255 SAVEFREEPV(lex_brackstack);
a0d0e21e 256 SAVEFREEPV(lex_casestack);
79072805 257 lex_casemods = 0;
a0d0e21e 258 *lex_casestack = '\0';
79072805
LW		 259 lex_dojoin = 0;
260 lex_starts = 0;
261 if (lex_stuff)
8990e307 262 SvREFCNT_dec(lex_stuff);
79072805
LW		 263 lex_stuff = Nullsv;
264 if (lex_repl)
8990e307 265 SvREFCNT_dec(lex_repl);
79072805
LW		 266 lex_repl = Nullsv;
267 lex_inpat = 0;
268 lex_inwhat = 0;
8990e307
LW		 269 linestr = line;
270 if (SvREADONLY(linestr))
271 linestr = sv_2mortal(newSVsv(linestr));
272 s = SvPV(linestr, len);
273 if (len && s[len-1] != ';') {
a0d0e21e 274 if (!(SvFLAGS(linestr) & SVs_TEMP))
8990e307
LW		 275 linestr = sv_2mortal(newSVsv(linestr));
276 sv_catpvn(linestr, "\n;", 2);
277 }
278 SvTEMP_off(linestr);
fd049845 279 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
79072805 280 bufend = bufptr + SvCUR(linestr);
c07a80fd 281 SvREFCNT_dec(rs);
282 rs = newSVpv("\n", 1);
8990e307 283 rsfp = 0;
79072805 284}
a687059c 285
463ee0b2 286void
8ac85365 287lex_end(void)
463ee0b2 288{
6ca21dd3 289 doextract = FALSE;
463ee0b2
LW		 290}
291
292static void
8ac85365 293restore_rsfp(void *f)
6d5fb7e3 294{
760ac839 295 PerlIO *fp = (PerlIO*)f;
6d5fb7e3 296
760ac839
LW		 297 if (rsfp == PerlIO_stdin())
298 PerlIO_clearerr(rsfp);
a5f75d66 299 else if (rsfp && (rsfp != fp))
760ac839 300 PerlIO_close(rsfp);
6d5fb7e3
CS		 301 rsfp = fp;
302}
303
304static void
8ac85365 305incline(char *s)
463ee0b2 306{
0f15f207 307 dTHR;
463ee0b2
LW		 308 char *t;
309 char *n;
310 char ch;
311 int sawline = 0;
312
313 curcop->cop_line++;
314 if (*s++ != '#')
315 return;
316 while (*s == ' ' || *s == '\t') s++;
317 if (strnEQ(s, "line ", 5)) {
318 s += 5;
319 sawline = 1;
320 }
321 if (!isDIGIT(*s))
322 return;
323 n = s;
324 while (isDIGIT(*s))
325 s++;
326 while (*s == ' ' || *s == '\t')
327 s++;
328 if (*s == '"' && (t = strchr(s+1, '"')))
329 s++;
330 else {
331 if (!sawline)
332 return; /* false alarm */
333 for (t = s; !isSPACE(*t); t++) ;
334 }
335 ch = *t;
336 *t = '\0';
337 if (t - s > 0)
338 curcop->cop_filegv = gv_fetchfile(s);
339 else
340 curcop->cop_filegv = gv_fetchfile(origfilename);
341 *t = ch;
342 curcop->cop_line = atoi(n)-1;
343}
344
8990e307 345static char *
8ac85365 346skipspace(register char *s)
a687059c 347{
11343788 348 dTHR;
85e6fe83 349 if (lex_formbrack && lex_brackets <= lex_formbrack) {
463ee0b2
LW		 350 while (s < bufend && (*s == ' ' || *s == '\t'))
351 s++;
352 return s;
353 }
354 for (;;) {
fd049845 355 STRLEN prevlen;
463ee0b2
LW		 356 while (s < bufend && isSPACE(*s))
357 s++;
358 if (s < bufend && *s == '#') {
359 while (s < bufend && *s != '\n')
360 s++;
361 if (s < bufend)
362 s++;
363 }
a0d0e21e 364 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
463ee0b2 365 return s;
fd049845 366 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
a0d0e21e 367 if (minus_n || minus_p) {
08e9d68e
DD		 368 sv_setpv(linestr,minus_p ?
369 ";}continue{print or die qq(-p destination: $!\\n)" :
370 "");
a0d0e21e
LW		 371 sv_catpv(linestr,";}");
372 minus_n = minus_p = 0;
373 }
374 else
375 sv_setpv(linestr,";");
fd049845 376 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
a0d0e21e
LW		 377 bufend = SvPVX(linestr) + SvCUR(linestr);
378 if (preprocess && !in_eval)
8990e307 379 (void)my_pclose(rsfp);
760ac839
LW		 380 else if ((PerlIO*)rsfp == PerlIO_stdin())
381 PerlIO_clearerr(rsfp);
8990e307 382 else
760ac839 383 (void)PerlIO_close(rsfp);
90248788
TB		 384 if (e_fp == rsfp)
385 e_fp = Nullfp;
8990e307 386 rsfp = Nullfp;
463ee0b2
LW		 387 return s;
388 }
fd049845 389 linestart = bufptr = s + prevlen;
390 bufend = s + SvCUR(linestr);
391 s = bufptr;
a0d0e21e 392 incline(s);
84902520 393 if (PERLDB_LINE && curstash != debstash) {
8990e307
LW		 394 SV *sv = NEWSV(85,0);
395
396 sv_upgrade(sv, SVt_PVMG);
fd049845 397 sv_setpvn(sv,bufptr,bufend-bufptr);
8990e307
LW		 398 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
399 }
463ee0b2 400 }
a687059c 401}
378cc40b 402
8990e307 403static void
8ac85365 404check_uni(void) {
2f3197b3
LW		 405 char *s;
406 char ch;
a0d0e21e 407 char *t;
2f3197b3
LW		 408
409 if (oldoldbufptr != last_uni)
410 return;
411 while (isSPACE(*last_uni))
412 last_uni++;
e334a159 413 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
a0d0e21e
LW		 414 if ((t = strchr(s, '(')) && t < bufptr)
415 return;
2f3197b3
LW		 416 ch = *s;
417 *s = '\0';
418 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
419 *s = ch;
420}
421
ffed7fef
LW		 422#ifdef CRIPPLED_CC
423
424#undef UNI
ffed7fef 425#define UNI(f) return uni(f,s)
ffed7fef 426
8990e307 427static int
8ac85365 428uni(I32 f, char *s)
ffed7fef
LW		 429{
430 yylval.ival = f;
79072805 431 expect = XTERM;
ffed7fef 432 bufptr = s;
2f3197b3 433 last_uni = oldbufptr;
a0d0e21e 434 last_lop_op = f;
ffed7fef
LW		 435 if (*s == '(')
436 return FUNC1;
437 s = skipspace(s);
438 if (*s == '(')
439 return FUNC1;
440 else
441 return UNIOP;
442}
443
a0d0e21e
LW		 444#endif /* CRIPPLED_CC */
445
446#define LOP(f,x) return lop(f,x,s)
447
8990e307 448static I32
f86702cc 449lop
450#ifdef CAN_PROTOTYPE
451 (I32 f, expectation x, char *s)
452#else
453 (f,x,s)
79072805 454I32 f;
a0d0e21e 455expectation x;
ffed7fef 456char *s;
f86702cc 457#endif /* CAN_PROTOTYPE */
ffed7fef 458{
0f15f207 459 dTHR;
79072805 460 yylval.ival = f;
35c8bce7 461 CLINE;
a0d0e21e 462 expect = x;
79072805 463 bufptr = s;
8990e307
LW		 464 last_lop = oldbufptr;
465 last_lop_op = f;
a0d0e21e
LW		 466 if (nexttoke)
467 return LSTOP;
79072805
LW		 468 if (*s == '(')
469 return FUNC;
470 s = skipspace(s);
471 if (*s == '(')
472 return FUNC;
473 else
474 return LSTOP;
475}
476
8990e307 477static void
8ac85365 478force_next(I32 type)
79072805
LW		 479{
480 nexttype[nexttoke] = type;
481 nexttoke++;
482 if (lex_state != LEX_KNOWNEXT) {
483 lex_defer = lex_state;
463ee0b2 484 lex_expect = expect;
79072805
LW		 485 lex_state = LEX_KNOWNEXT;
486 }
487}
488
8990e307 489static char *
8ac85365 490force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_tick)
79072805 491{
463ee0b2
LW		 492 register char *s;
493 STRLEN len;
494
495 start = skipspace(start);
496 s = start;
a0d0e21e
LW		 497 if (isIDFIRST(*s) ||
498 (allow_pack && *s == ':') ||
499 (allow_tick && *s == '\'') )
500 {
8903cb82 501 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
463ee0b2
LW		 502 if (check_keyword && keyword(tokenbuf, len))
503 return start;
504 if (token == METHOD) {
505 s = skipspace(s);
506 if (*s == '(')
507 expect = XTERM;
508 else {
509 expect = XOPERATOR;
510 force_next(')');
511 force_next('(');
512 }
79072805 513 }
463ee0b2 514 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
8990e307 515 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
79072805
LW		 516 force_next(token);
517 }
518 return s;
519}
520
8990e307 521static void
8ac85365 522force_ident(register char *s, int kind)
79072805
LW		 523{
524 if (s && *s) {
11343788
MB		 525 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
526 nextval[nexttoke].opval = o;
79072805 527 force_next(WORD);
748a9306 528 if (kind) {
e858de61 529 dTHR; /* just for in_eval */
11343788 530 o->op_private = OPpCONST_ENTERED;
55497cff 531 /* XXX see note in pp_entereval() for why we forgo typo
532 warnings if the symbol must be introduced in an eval.
533 GSAR 96-10-12 */
534 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
a0d0e21e
LW		 535 kind == '$' ? SVt_PV :
536 kind == '@' ? SVt_PVAV :
537 kind == '%' ? SVt_PVHV :
538 SVt_PVGV
539 );
748a9306 540 }
79072805
LW		 541 }
542}
543
89bfa8cd 544static char *
8ac85365 545force_version(char *s)
89bfa8cd 546{
547 OP *version = Nullop;
548
549 s = skipspace(s);
550
551 /* default VERSION number -- GBARR */
552
553 if(isDIGIT(*s)) {
554 char *d;
555 int c;
55497cff 556 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
89bfa8cd 557 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
558 s = scan_num(s);
559 /* real VERSION number -- GBARR */
560 version = yylval.opval;
561 }
562 }
563
564 /* NOTE: The parser sees the package name and the VERSION swapped */
565 nextval[nexttoke].opval = version;
566 force_next(WORD);
567
568 return (s);
569}
570
8990e307 571static SV *
8ac85365 572q(SV *sv)
79072805
LW		 573{
574 register char *s;
575 register char *send;
576 register char *d;
463ee0b2 577 STRLEN len;
79072805
LW		 578
579 if (!SvLEN(sv))
580 return sv;
581
a0d0e21e 582 s = SvPV_force(sv, len);
748a9306
LW		 583 if (SvIVX(sv) == -1)
584 return sv;
463ee0b2 585 send = s + len;
79072805
LW		 586 while (s < send && *s != '\\')
587 s++;
588 if (s == send)
589 return sv;
590 d = s;
79072805
LW		 591 while (s < send) {
592 if (*s == '\\') {
a0d0e21e 593 if (s + 1 < send && (s[1] == '\\'))
79072805
LW		 594 s++; /* all that, just for this */
595 }
596 *d++ = *s++;
597 }
598 *d = '\0';
463ee0b2 599 SvCUR_set(sv, d - SvPVX(sv));
79072805
LW		 600
601 return sv;
602}
603
8990e307 604static I32
8ac85365 605sublex_start(void)
79072805
LW		 606{
607 register I32 op_type = yylval.ival;
79072805
LW		 608
609 if (op_type == OP_NULL) {
610 yylval.opval = lex_op;
611 lex_op = Nullop;
612 return THING;
613 }
614 if (op_type == OP_CONST || op_type == OP_READLINE) {
1c9c84df
CS		 615 SV *sv = q(lex_stuff);
616 STRLEN len;
617 char *p = SvPV(sv, len);
618 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
619 SvREFCNT_dec(sv);
79072805
LW		 620 lex_stuff = Nullsv;
621 return THING;
622 }
623
55497cff 624 sublex_info.super_state = lex_state;
625 sublex_info.sub_inwhat = op_type;
626 sublex_info.sub_op = lex_op;
627 lex_state = LEX_INTERPPUSH;
628
629 expect = XTERM;
630 if (lex_op) {
631 yylval.opval = lex_op;
632 lex_op = Nullop;
633 return PMFUNC;
634 }
635 else
636 return FUNC;
637}
638
639static I32
8ac85365 640sublex_push(void)
55497cff 641{
0f15f207 642 dTHR;
79072805 643 push_scope();
55497cff 644
645 lex_state = sublex_info.super_state;
646 SAVEI32(lex_dojoin);
647 SAVEI32(lex_brackets);
648 SAVEI32(lex_fakebrack);
649 SAVEI32(lex_casemods);
650 SAVEI32(lex_starts);
651 SAVEI32(lex_state);
a0d0e21e 652 SAVESPTR(lex_inpat);
55497cff 653 SAVEI32(lex_inwhat);
654 SAVEI16(curcop->cop_line);
85e6fe83
LW		 655 SAVEPPTR(bufptr);
656 SAVEPPTR(oldbufptr);
657 SAVEPPTR(oldoldbufptr);
fd049845 658 SAVEPPTR(linestart);
79072805 659 SAVESPTR(linestr);
85e6fe83 660 SAVEPPTR(lex_brackstack);
a0d0e21e 661 SAVEPPTR(lex_casestack);
79072805
LW		 662
663 linestr = lex_stuff;
664 lex_stuff = Nullsv;
665
fd049845 666 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
79072805 667 bufend += SvCUR(linestr);
8990e307 668 SAVEFREESV(linestr);
79072805
LW		 669
670 lex_dojoin = FALSE;
671 lex_brackets = 0;
672 lex_fakebrack = 0;
8990e307 673 New(899, lex_brackstack, 120, char);
a0d0e21e 674 New(899, lex_casestack, 12, char);
8990e307 675 SAVEFREEPV(lex_brackstack);
a0d0e21e 676 SAVEFREEPV(lex_casestack);
79072805 677 lex_casemods = 0;
a0d0e21e 678 *lex_casestack = '\0';
79072805
LW		 679 lex_starts = 0;
680 lex_state = LEX_INTERPCONCAT;
681 curcop->cop_line = multi_start;
682
55497cff 683 lex_inwhat = sublex_info.sub_inwhat;
684 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
685 lex_inpat = sublex_info.sub_op;
79072805 686 else
55497cff 687 lex_inpat = Nullop;
79072805 688
55497cff 689 return '(';
79072805
LW		 690}
691
8990e307 692static I32
8ac85365 693sublex_done(void)
79072805
LW		 694{
695 if (!lex_starts++) {
696 expect = XOPERATOR;
93a17b20 697 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
79072805
LW		 698 return THING;
699 }
700
701 if (lex_casemods) { /* oops, we've got some unbalanced parens */
702 lex_state = LEX_INTERPCASEMOD;
703 return yylex();
704 }
705
79072805
LW		 706 /* Is there a right-hand side to take care of? */
707 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
708 linestr = lex_repl;
709 lex_inpat = 0;
fd049845 710 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
79072805 711 bufend += SvCUR(linestr);
8990e307 712 SAVEFREESV(linestr);
79072805
LW		 713 lex_dojoin = FALSE;
714 lex_brackets = 0;
715 lex_fakebrack = 0;
716 lex_casemods = 0;
a0d0e21e 717 *lex_casestack = '\0';
79072805
LW		 718 lex_starts = 0;
719 if (SvCOMPILED(lex_repl)) {
720 lex_state = LEX_INTERPNORMAL;
721 lex_starts++;
722 }
723 else
724 lex_state = LEX_INTERPCONCAT;
725 lex_repl = Nullsv;
726 return ',';
ffed7fef
LW		 727 }
728 else {
79072805 729 pop_scope();
463ee0b2 730 bufend = SvPVX(linestr);
79072805
LW		 731 bufend += SvCUR(linestr);
732 expect = XOPERATOR;
733 return ')';
ffed7fef
LW		 734 }
735}
736
8990e307 737static char *
8ac85365 738scan_const(char *start)
79072805
LW		 739{
740 register char *send = bufend;
741 SV *sv = NEWSV(93, send - start);
742 register char *s = start;
463ee0b2 743 register char *d = SvPVX(sv);
79072805
LW		 744 bool dorange = FALSE;
745 I32 len;
72aaf631 746 char *leaveit =
79072805 747 lex_inpat
748a9306 748 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
79072805
LW		 749 : (lex_inwhat & OP_TRANS)
750 ? ""
751 : "";
752
753 while (s < send || dorange) {
754 if (lex_inwhat == OP_TRANS) {
755 if (dorange) {
756 I32 i;
757 I32 max;
463ee0b2 758 i = d - SvPVX(sv);
79072805 759 SvGROW(sv, SvLEN(sv) + 256);
463ee0b2 760 d = SvPVX(sv) + i;
79072805 761 d -= 2;
91b7def8 762 max = (U8)d[1];
763 for (i = (U8)*d; i <= max; i++)
79072805
LW		 764 *d++ = i;
765 dorange = FALSE;
766 continue;
767 }
768 else if (*s == '-' && s+1 < send && s != start) {
769 dorange = TRUE;
770 s++;
771 }
772 }
748a9306
LW		 773 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
774 while (s < send && *s != ')')
775 *d++ = *s++;
776 }
777 else if (*s == '#' && lex_inpat &&
778 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
779 while (s+1 < send && *s != '\n')
780 *d++ = *s++;
781 }
a0d0e21e 782 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
79072805
LW		 783 break;
784 else if (*s == '$') {
785 if (!lex_inpat) /* not a regexp, so $ must be var */
786 break;
a0d0e21e 787 if (s + 1 < send && !strchr(")| \n\t", s[1]))
79072805
LW		 788 break; /* in regexp, $ might be tail anchor */
789 }
790 if (*s == '\\' && s+1 < send) {
791 s++;
72aaf631 792 if (*s && strchr(leaveit, *s)) {
79072805
LW		 793 *d++ = '\\';
794 *d++ = *s++;
795 continue;
796 }
797 if (lex_inwhat == OP_SUBST && !lex_inpat &&
a0d0e21e 798 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
79072805 799 {
a0d0e21e
LW		 800 if (dowarn)
801 warn("\\%c better written as $%c", *s, *s);
79072805
LW		 802 *--s = '$';
803 break;
804 }
a0d0e21e 805 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
79072805
LW		 806 --s;
807 break;
808 }
809 switch (*s) {
810 case '-':
811 if (lex_inwhat == OP_TRANS) {
812 *d++ = *s++;
813 continue;
814 }
815 /* FALL THROUGH */
816 default:
817 *d++ = *s++;
818 continue;
819 case '0': case '1': case '2': case '3':
820 case '4': case '5': case '6': case '7':
821 *d++ = scan_oct(s, 3, &len);
822 s += len;
823 continue;
824 case 'x':
825 *d++ = scan_hex(++s, 2, &len);
826 s += len;
827 continue;
828 case 'c':
829 s++;
bbce6d69 830 len = *s++;
831 *d++ = toCTRL(len);
79072805
LW		 832 continue;
833 case 'b':
834 *d++ = '\b';
835 break;
836 case 'n':
837 *d++ = '\n';
838 break;
839 case 'r':
840 *d++ = '\r';
841 break;
842 case 'f':
843 *d++ = '\f';
844 break;
845 case 't':
846 *d++ = '\t';
847 break;
848 case 'e':
849 *d++ = '\033';
850 break;
851 case 'a':
852 *d++ = '\007';
853 break;
854 }
855 s++;
856 continue;
857 }
858 *d++ = *s++;
859 }
860 *d = '\0';
463ee0b2 861 SvCUR_set(sv, d - SvPVX(sv));
79072805
LW		 862 SvPOK_on(sv);
863
864 if (SvCUR(sv) + 5 < SvLEN(sv)) {
865 SvLEN_set(sv, SvCUR(sv) + 1);
463ee0b2 866 Renew(SvPVX(sv), SvLEN(sv), char);
79072805
LW		 867 }
868 if (s > bufptr)
869 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
870 else
8990e307 871 SvREFCNT_dec(sv);
79072805
LW		 872 return s;
873}
874
875/* This is the one truly awful dwimmer necessary to conflate C and sed. */
8990e307 876static int
8ac85365 877intuit_more(register char *s)
79072805
LW		 878{
879 if (lex_brackets)
880 return TRUE;
881 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
882 return TRUE;
883 if (*s != '{' && *s != '[')
884 return FALSE;
885 if (!lex_inpat)
886 return TRUE;
887
888 /* In a pattern, so maybe we have {n,m}. */
889 if (*s == '{') {
890 s++;
891 if (!isDIGIT(*s))
892 return TRUE;
893 while (isDIGIT(*s))
894 s++;
895 if (*s == ',')
896 s++;
897 while (isDIGIT(*s))
898 s++;
899 if (*s == '}')
900 return FALSE;
901 return TRUE;
902
903 }
904
905 /* On the other hand, maybe we have a character class */
906
907 s++;
908 if (*s == ']' || *s == '^')
909 return FALSE;
910 else {
911 int weight = 2; /* let's weigh the evidence */
912 char seen[256];
913 unsigned char un_char = 0, last_un_char;
93a17b20 914 char *send = strchr(s,']');
8903cb82 915 char tmpbuf[sizeof tokenbuf * 4];
79072805
LW		 916
917 if (!send) /* has to be an expression */
918 return TRUE;
919
920 Zero(seen,256,char);
921 if (*s == '$')
922 weight -= 3;
923 else if (isDIGIT(*s)) {
924 if (s[1] != ']') {
925 if (isDIGIT(s[1]) && s[2] == ']')
926 weight -= 10;
927 }
928 else
929 weight -= 100;
930 }
931 for (; s < send; s++) {
932 last_un_char = un_char;
933 un_char = (unsigned char)*s;
934 switch (*s) {
935 case '@':
936 case '&':
937 case '$':
938 weight -= seen[un_char] * 10;
939 if (isALNUM(s[1])) {
8903cb82 940 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
a0d0e21e 941 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
79072805
LW		 942 weight -= 100;
943 else
944 weight -= 10;
945 }
946 else if (*s == '$' && s[1] &&
93a17b20
LW		 947 strchr("[#!%*<>()-=",s[1])) {
948 if (/*{*/ strchr("])} =",s[2]))
79072805
LW		 949 weight -= 10;
950 else
951 weight -= 1;
952 }
953 break;
954 case '\\':
955 un_char = 254;
956 if (s[1]) {
93a17b20 957 if (strchr("wds]",s[1]))
79072805
LW		 958 weight += 100;
959 else if (seen['\''] || seen['"'])
960 weight += 1;
93a17b20 961 else if (strchr("rnftbxcav",s[1]))
79072805
LW		 962 weight += 40;
963 else if (isDIGIT(s[1])) {
964 weight += 40;
965 while (s[1] && isDIGIT(s[1]))
966 s++;
967 }
968 }
969 else
970 weight += 100;
971 break;
972 case '-':
973 if (s[1] == '\\')
974 weight += 50;
93a17b20 975 if (strchr("aA01! ",last_un_char))
79072805 976 weight += 30;
93a17b20 977 if (strchr("zZ79~",s[1]))
79072805
LW		 978 weight += 30;
979 break;
980 default:
93a17b20 981 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
79072805
LW		 982 isALPHA(*s) && s[1] && isALPHA(s[1])) {
983 char *d = tmpbuf;
984 while (isALPHA(*s))
985 *d++ = *s++;
986 *d = '\0';
987 if (keyword(tmpbuf, d - tmpbuf))
988 weight -= 150;
989 }
990 if (un_char == last_un_char + 1)
991 weight += 5;
992 weight -= seen[un_char];
993 break;
994 }
995 seen[un_char]++;
996 }
997 if (weight >= 0) /* probably a character class */
998 return FALSE;
999 }
1000
1001 return TRUE;
1002}
ffed7fef 1003
a0d0e21e 1004static int
8ac85365 1005intuit_method(char *start, GV *gv)
a0d0e21e
LW		 1006{
1007 char *s = start + (*start == '$');
8903cb82 1008 char tmpbuf[sizeof tokenbuf];
a0d0e21e
LW		 1009 STRLEN len;
1010 GV* indirgv;
1011
1012 if (gv) {
1013 if (GvIO(gv))
1014 return 0;
8ebc5c01 1015 if (!GvCVu(gv))
a0d0e21e
LW		 1016 gv = 0;
1017 }
8903cb82 1018 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
a0d0e21e
LW		 1019 if (*start == '$') {
1020 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1021 return 0;
1022 s = skipspace(s);
1023 bufptr = start;
1024 expect = XREF;
1025 return *s == '(' ? FUNCMETH : METHOD;
1026 }
1027 if (!keyword(tmpbuf, len)) {
1028 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
8ebc5c01 1029 if (indirgv && GvCVu(indirgv))
a0d0e21e
LW		 1030 return 0;
1031 /* filehandle or package name makes it a method */
89bfa8cd 1032 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
a0d0e21e 1033 s = skipspace(s);
55497cff 1034 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1035 return 0; /* no assumptions -- "=>" quotes bearword */
a0d0e21e
LW		 1036 nextval[nexttoke].opval =
1037 (OP*)newSVOP(OP_CONST, 0,
1038 newSVpv(tmpbuf,0));
1039 nextval[nexttoke].opval->op_private =
1040 OPpCONST_BARE;
1041 expect = XTERM;
1042 force_next(WORD);
1043 bufptr = s;
1044 return *s == '(' ? FUNCMETH : METHOD;
1045 }
1046 }
1047 return 0;
1048}
1049
1050static char*
8ac85365 1051incl_perldb(void)
a0d0e21e
LW		 1052{
1053 if (perldb) {
1054 char *pdb = getenv("PERL5DB");
1055
1056 if (pdb)
1057 return pdb;
1058 return "BEGIN { require 'perl5db.pl' }";
1059 }
1060 return "";
1061}
1062
1063
16d20bd9
AD		 1064/* Encoded script support. filter_add() effectively inserts a
1065 * 'pre-processing' function into the current source input stream.
1066 * Note that the filter function only applies to the current source file
1067 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1068 *
1069 * The datasv parameter (which may be NULL) can be used to pass
1070 * private data to this instance of the filter. The filter function
1071 * can recover the SV using the FILTER_DATA macro and use it to
1072 * store private buffers and state information.
1073 *
1074 * The supplied datasv parameter is upgraded to a PVIO type
1075 * and the IoDIRP field is used to store the function pointer.
1076 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1077 * private use must be set using malloc'd pointers.
1078 */
1079static int filter_debug = 0;
1080
1081SV *
8ac85365 1082filter_add(filter_t funcp, SV *datasv)
16d20bd9
AD		 1083{
1084 if (!funcp){ /* temporary handy debugging hack to be deleted */
1085 filter_debug = atoi((char*)datasv);
1086 return NULL;
1087 }
1088 if (!rsfp_filters)
1089 rsfp_filters = newAV();
1090 if (!datasv)
1091 datasv = newSV(0);
1092 if (!SvUPGRADE(datasv, SVt_PVIO))
1093 die("Can't upgrade filter_add data to SVt_PVIO");
1094 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1095 if (filter_debug)
ff0cee69 1096 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
e50aee73
AD		 1097 av_unshift(rsfp_filters, 1);
1098 av_store(rsfp_filters, 0, datasv) ;
16d20bd9
AD		 1099 return(datasv);
1100}
1101
1102
1103/* Delete most recently added instance of this filter function. */
a0d0e21e 1104void
8ac85365 1105filter_del(filter_t funcp)
16d20bd9
AD		 1106{
1107 if (filter_debug)
ff0cee69 1108 warn("filter_del func %p", funcp);
16d20bd9
AD		 1109 if (!rsfp_filters || AvFILL(rsfp_filters)<0)
1110 return;
1111 /* if filter is on top of stack (usual case) just pop it off */
e50aee73
AD		 1112 if (IoDIRP(FILTER_DATA(0)) == (void*)funcp){
1113 /* sv_free(av_pop(rsfp_filters)); */
1114 sv_free(av_shift(rsfp_filters));
1115
16d20bd9
AD		 1116 return;
1117 }
1118 /* we need to search for the correct entry and clear it */
1119 die("filter_del can only delete in reverse order (currently)");
1120}
1121
1122
1123/* Invoke the n'th filter function for the current rsfp. */
1124I32
8ac85365
NIS		 1125filter_read(int idx, SV *buf_sv, int maxlen)
1126
1127
1128 /* 0 = read one text line */
a0d0e21e 1129{
16d20bd9
AD		 1130 filter_t funcp;
1131 SV *datasv = NULL;
e50aee73 1132
16d20bd9
AD		 1133 if (!rsfp_filters)
1134 return -1;
1135 if (idx > AvFILL(rsfp_filters)){ /* Any more filters? */
1136 /* Provide a default input filter to make life easy. */
1137 /* Note that we append to the line. This is handy. */
16d20bd9
AD		 1138 if (filter_debug)
1139 warn("filter_read %d: from rsfp\n", idx);
1140 if (maxlen) {
1141 /* Want a block */
1142 int len ;
1143 int old_len = SvCUR(buf_sv) ;
1144
1145 /* ensure buf_sv is large enough */
1146 SvGROW(buf_sv, old_len + maxlen) ;
760ac839
LW		 1147 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1148 if (PerlIO_error(rsfp))
37120919
AD		 1149 return -1; /* error */
1150 else
1151 return 0 ; /* end of file */
1152 }
16d20bd9
AD		 1153 SvCUR_set(buf_sv, old_len + len) ;
1154 } else {
1155 /* Want a line */
37120919 1156 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
760ac839 1157 if (PerlIO_error(rsfp))
37120919
AD		 1158 return -1; /* error */
1159 else
1160 return 0 ; /* end of file */
1161 }
16d20bd9
AD		 1162 }
1163 return SvCUR(buf_sv);
1164 }
1165 /* Skip this filter slot if filter has been deleted */
1166 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1167 if (filter_debug)
1168 warn("filter_read %d: skipped (filter deleted)\n", idx);
1169 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1170 }
1171 /* Get function pointer hidden within datasv */
1172 funcp = (filter_t)IoDIRP(datasv);
1173 if (filter_debug)
ff0cee69 1174 warn("filter_read %d: via function %p (%s)\n",
16d20bd9
AD		 1175 idx, funcp, SvPV(datasv,na));
1176 /* Call function. The function is expected to */
1177 /* call "FILTER_READ(idx+1, buf_sv)" first. */
37120919 1178 /* Return: <0:error, =0:eof, >0:not eof */
16d20bd9
AD		 1179 return (*funcp)(idx, buf_sv, maxlen);
1180}
1181
1182static char *
8ac85365 1183filter_gets(register SV *sv, register FILE *fp, STRLEN append)
16d20bd9
AD		 1184{
1185 if (rsfp_filters) {
1186
55497cff 1187 if (!append)
1188 SvCUR_set(sv, 0); /* start with empty line */
16d20bd9
AD		 1189 if (FILTER_READ(0, sv, 0) > 0)
1190 return ( SvPVX(sv) ) ;
1191 else
1192 return Nullch ;
1193 }
1194 else
fd049845 1195 return (sv_gets(sv, fp, append));
16d20bd9 1196
a0d0e21e
LW		 1197}
1198
1199
748a9306
LW		 1200#ifdef DEBUGGING
1201 static char* exp_name[] =
a0d0e21e 1202 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
748a9306 1203#endif
463ee0b2 1204
71be2cbc 1205EXT int yychar; /* last token */
463ee0b2 1206
2f3197b3 1207int
8ac85365 1208yylex(void)
378cc40b 1209{
11343788 1210 dTHR;
79072805 1211 register char *s;
378cc40b 1212 register char *d;
79072805 1213 register I32 tmp;
463ee0b2 1214 STRLEN len;
a687059c 1215
bbce6d69 1216 if (pending_ident) {
1217 char pit = pending_ident;
1218 pending_ident = 0;
1219
1220 if (in_my) {
1221 if (strchr(tokenbuf,':'))
1222 croak(no_myglob,tokenbuf);
1223 yylval.opval = newOP(OP_PADANY, 0);
1224 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1225 return PRIVATEREF;
1226 }
1227
a863c7d1
MB		 1228 if (!strchr(tokenbuf,':')) {
1229#ifdef USE_THREADS
1230 /* Check for single character per-thread magicals */
1231 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
554b3eca
MB		 1232 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-magicals */
1233 && (tmp = find_thread_magical(&tokenbuf[1])) != NOT_IN_PAD)
1234 {
2faa37cc 1235 yylval.opval = newOP(OP_THREADSV, 0);
a863c7d1
MB		 1236 yylval.opval->op_targ = tmp;
1237 return PRIVATEREF;
1238 }
1239#endif /* USE_THREADS */
1240 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1241 if (last_lop_op == OP_SORT &&
1242 tokenbuf[0] == '$' &&
1243 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1244 && !tokenbuf[2])
bbce6d69 1245 {
a863c7d1
MB		 1246 for (d = in_eval ? oldoldbufptr : linestart;
1247 d < bufend && *d != '\n';
1248 d++)
1249 {
1250 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1251 croak("Can't use \"my %s\" in sort comparison",
1252 tokenbuf);
1253 }
bbce6d69 1254 }
1255 }
bbce6d69 1256
a863c7d1
MB		 1257 yylval.opval = newOP(OP_PADANY, 0);
1258 yylval.opval->op_targ = tmp;
1259 return PRIVATEREF;
1260 }
bbce6d69 1261 }
1262
1263 /* Force them to make up their mind on "@foo". */
1264 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1265 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
46fc3d4c 1266 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1267 yyerror(form("In string, %s now must be written as \\%s",
1268 tokenbuf, tokenbuf));
bbce6d69 1269 }
1270
1271 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1272 yylval.opval->op_private = OPpCONST_ENTERED;
1273 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1274 ((tokenbuf[0] == '$') ? SVt_PV
1275 : (tokenbuf[0] == '@') ? SVt_PVAV
1276 : SVt_PVHV));
1277 return WORD;
1278 }
1279
79072805
LW		 1280 switch (lex_state) {
1281#ifdef COMMENTARY
1282 case LEX_NORMAL: /* Some compilers will produce faster */
1283 case LEX_INTERPNORMAL: /* code if we comment these out. */
1284 break;
1285#endif
1286
1287 case LEX_KNOWNEXT:
1288 nexttoke--;
1289 yylval = nextval[nexttoke];
463ee0b2 1290 if (!nexttoke) {
79072805 1291 lex_state = lex_defer;
463ee0b2 1292 expect = lex_expect;
a0d0e21e 1293 lex_defer = LEX_NORMAL;
463ee0b2 1294 }
79072805
LW		 1295 return(nexttype[nexttoke]);
1296
1297 case LEX_INTERPCASEMOD:
1298#ifdef DEBUGGING
1299 if (bufptr != bufend && *bufptr != '\\')
463ee0b2 1300 croak("panic: INTERPCASEMOD");
79072805
LW		 1301#endif
1302 if (bufptr == bufend || bufptr[1] == 'E') {
a0d0e21e 1303 char oldmod;
79072805 1304 if (lex_casemods) {
a0d0e21e
LW		 1305 oldmod = lex_casestack[--lex_casemods];
1306 lex_casestack[lex_casemods] = '\0';
1307 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1308 bufptr += 2;
1309 lex_state = LEX_INTERPCONCAT;
1310 }
79072805
LW		 1311 return ')';
1312 }
a0d0e21e
LW		 1313 if (bufptr != bufend)
1314 bufptr += 2;
1315 lex_state = LEX_INTERPCONCAT;
79072805
LW		 1316 return yylex();
1317 }
1318 else {
1319 s = bufptr + 1;
1320 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1321 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
a0d0e21e
LW		 1322 if (strchr("LU", *s) &&
1323 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1324 {
1325 lex_casestack[--lex_casemods] = '\0';
1326 return ')';
1327 }
1328 if (lex_casemods > 10) {
89bfa8cd 1329 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
a0d0e21e
LW		 1330 if (newlb != lex_casestack) {
1331 SAVEFREEPV(newlb);
1332 lex_casestack = newlb;
1333 }
1334 }
1335 lex_casestack[lex_casemods++] = *s;
1336 lex_casestack[lex_casemods] = '\0';
79072805
LW		 1337 lex_state = LEX_INTERPCONCAT;
1338 nextval[nexttoke].ival = 0;
1339 force_next('(');
1340 if (*s == 'l')
1341 nextval[nexttoke].ival = OP_LCFIRST;
1342 else if (*s == 'u')
1343 nextval[nexttoke].ival = OP_UCFIRST;
1344 else if (*s == 'L')
1345 nextval[nexttoke].ival = OP_LC;
1346 else if (*s == 'U')
1347 nextval[nexttoke].ival = OP_UC;
a0d0e21e
LW		 1348 else if (*s == 'Q')
1349 nextval[nexttoke].ival = OP_QUOTEMETA;
79072805 1350 else
463ee0b2 1351 croak("panic: yylex");
79072805
LW		 1352 bufptr = s + 1;
1353 force_next(FUNC);
1354 if (lex_starts) {
1355 s = bufptr;
463ee0b2 1356 lex_starts = 0;
79072805
LW		 1357 Aop(OP_CONCAT);
1358 }
1359 else
1360 return yylex();
1361 }
1362
55497cff 1363 case LEX_INTERPPUSH:
1364 return sublex_push();
1365
79072805
LW		 1366 case LEX_INTERPSTART:
1367 if (bufptr == bufend)
1368 return sublex_done();
1369 expect = XTERM;
1370 lex_dojoin = (*bufptr == '@');
1371 lex_state = LEX_INTERPNORMAL;
1372 if (lex_dojoin) {
1373 nextval[nexttoke].ival = 0;
1374 force_next(',');
554b3eca 1375#ifdef USE_THREADS
2faa37cc 1376 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
554b3eca
MB		 1377 nextval[nexttoke].opval->op_targ = find_thread_magical("\"");
1378 force_next(PRIVATEREF);
1379#else
a0d0e21e 1380 force_ident("\"", '$');
554b3eca 1381#endif /* USE_THREADS */
79072805
LW		 1382 nextval[nexttoke].ival = 0;
1383 force_next('$');
1384 nextval[nexttoke].ival = 0;
1385 force_next('(');
1386 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1387 force_next(FUNC);
1388 }
1389 if (lex_starts++) {
1390 s = bufptr;
1391 Aop(OP_CONCAT);
1392 }
68dc0745 1393 return yylex();
79072805
LW		 1394
1395 case LEX_INTERPENDMAYBE:
1396 if (intuit_more(bufptr)) {
1397 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1398 break;
1399 }
1400 /* FALL THROUGH */
1401
1402 case LEX_INTERPEND:
1403 if (lex_dojoin) {
1404 lex_dojoin = FALSE;
1405 lex_state = LEX_INTERPCONCAT;
1406 return ')';
1407 }
1408 /* FALLTHROUGH */
1409 case LEX_INTERPCONCAT:
1410#ifdef DEBUGGING
1411 if (lex_brackets)
463ee0b2 1412 croak("panic: INTERPCONCAT");
79072805
LW		 1413#endif
1414 if (bufptr == bufend)
1415 return sublex_done();
1416
ed6116ce 1417 if (SvIVX(linestr) == '\'') {
79072805
LW		 1418 SV *sv = newSVsv(linestr);
1419 if (!lex_inpat)
1420 sv = q(sv);
1421 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1422 s = bufend;
1423 }
1424 else {
1425 s = scan_const(bufptr);
1426 if (*s == '\\')
1427 lex_state = LEX_INTERPCASEMOD;
1428 else
1429 lex_state = LEX_INTERPSTART;
1430 }
1431
1432 if (s != bufptr) {
1433 nextval[nexttoke] = yylval;
463ee0b2 1434 expect = XTERM;
79072805
LW		 1435 force_next(THING);
1436 if (lex_starts++)
1437 Aop(OP_CONCAT);
1438 else {
1439 bufptr = s;
1440 return yylex();
1441 }
1442 }
1443
1444 return yylex();
a0d0e21e
LW		 1445 case LEX_FORMLINE:
1446 lex_state = LEX_NORMAL;
1447 s = scan_formline(bufptr);
1448 if (!lex_formbrack)
1449 goto rightbracket;
1450 OPERATOR(';');
79072805
LW		 1451 }
1452
1453 s = bufptr;
a687059c
LW		 1454 oldoldbufptr = oldbufptr;
1455 oldbufptr = s;
79072805 1456 DEBUG_p( {
760ac839 1457 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
79072805 1458 } )
463ee0b2
LW		 1459
1460 retry:
378cc40b
LW		 1461 switch (*s) {
1462 default:
54310121 1463 croak("Unrecognized character \\%03o", *s & 255);
e929a76b
LW		 1464 case 4:
1465 case 26:
1466 goto fake_eof; /* emulate EOF on ^D or ^Z */
378cc40b 1467 case 0:
463ee0b2 1468 if (!rsfp) {
55497cff 1469 last_uni = 0;
1470 last_lop = 0;
463ee0b2
LW		 1471 if (lex_brackets)
1472 yyerror("Missing right bracket");
79072805 1473 TOKEN(0);
463ee0b2 1474 }
a687059c
LW		 1475 if (s++ < bufend)
1476 goto retry; /* ignore stray nulls */
2f3197b3 1477 last_uni = 0;
79072805 1478 last_lop = 0;
a0d0e21e 1479 if (!in_eval && !preambled) {
79072805 1480 preambled = TRUE;
a0d0e21e 1481 sv_setpv(linestr,incl_perldb());
91b7def8 1482 if (SvCUR(linestr))
1483 sv_catpv(linestr,";");
1484 if (preambleav){
1485 while(AvFILL(preambleav) >= 0) {
1486 SV *tmpsv = av_shift(preambleav);
1487 sv_catsv(linestr, tmpsv);
1488 sv_catpv(linestr, ";");
1489 sv_free(tmpsv);
1490 }
1491 sv_free((SV*)preambleav);
1492 preambleav = NULL;
1493 }
79072805
LW		 1494 if (minus_n || minus_p) {
1495 sv_catpv(linestr, "LINE: while (<>) {");
1496 if (minus_l)
a0d0e21e 1497 sv_catpv(linestr,"chomp;");
8fd239a7
CS		 1498 if (minus_a) {
1499 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1500 if (gv)
1501 GvIMPORTED_AV_on(gv);
1502 if (minus_F) {
54310121 1503 if (strchr("/'\"", *splitstr)
1504 && strchr(splitstr + 1, *splitstr))
46fc3d4c 1505 sv_catpvf(linestr, "@F=split(%s);", splitstr);
54310121 1506 else {
1507 char delim;
1508 s = "'~#\200\1'"; /* surely one char is unused...*/
1509 while (s[1] && strchr(splitstr, *s)) s++;
1510 delim = *s;
46fc3d4c 1511 sv_catpvf(linestr, "@F=split(%s%c",
1512 "q" + (delim == '\''), delim);
1513 for (s = splitstr; *s; s++) {
54310121 1514 if (*s == '\\')
46fc3d4c 1515 sv_catpvn(linestr, "\\", 1);
1516 sv_catpvn(linestr, s, 1);
54310121 1517 }
46fc3d4c 1518 sv_catpvf(linestr, "%c);", delim);
54310121 1519 }
2304df62
AD		 1520 }
1521 else
1522 sv_catpv(linestr,"@F=split(' ');");
1523 }
79072805 1524 }
a0d0e21e 1525 sv_catpv(linestr, "\n");
fd049845 1526 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
463ee0b2 1527 bufend = SvPVX(linestr) + SvCUR(linestr);
84902520 1528 if (PERLDB_LINE && curstash != debstash) {
a0d0e21e
LW		 1529 SV *sv = NEWSV(85,0);
1530
1531 sv_upgrade(sv, SVt_PVMG);
1532 sv_setsv(sv,linestr);
1533 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1534 }
79072805 1535 goto retry;
a687059c 1536 }
e929a76b 1537 do {
fd049845 1538 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
e929a76b 1539 fake_eof:
395c3793 1540 if (rsfp) {
a0d0e21e 1541 if (preprocess && !in_eval)
79072805 1542 (void)my_pclose(rsfp);
760ac839
LW		 1543 else if ((PerlIO *)rsfp == PerlIO_stdin())
1544 PerlIO_clearerr(rsfp);
395c3793 1545 else
760ac839 1546 (void)PerlIO_close(rsfp);
90248788
TB		 1547 if (e_fp == rsfp)
1548 e_fp = Nullfp;
395c3793
LW		 1549 rsfp = Nullfp;
1550 }
a0d0e21e 1551 if (!in_eval && (minus_n || minus_p)) {
79072805
LW		 1552 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1553 sv_catpv(linestr,";}");
fd049845 1554 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
463ee0b2 1555 bufend = SvPVX(linestr) + SvCUR(linestr);
e929a76b
LW		 1556 minus_n = minus_p = 0;
1557 goto retry;
1558 }
fd049845 1559 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
79072805
LW		 1560 sv_setpv(linestr,"");
1561 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
378cc40b 1562 }
a0d0e21e
LW		 1563 if (doextract) {
1564 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1565 doextract = FALSE;
1566
1567 /* Incest with pod. */
1568 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1569 sv_setpv(linestr, "");
fd049845 1570 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
a0d0e21e
LW		 1571 bufend = SvPVX(linestr) + SvCUR(linestr);
1572 doextract = FALSE;
1573 }
1574 }
463ee0b2 1575 incline(s);
e929a76b 1576 } while (doextract);
fd049845 1577 oldoldbufptr = oldbufptr = bufptr = linestart = s;
84902520 1578 if (PERLDB_LINE && curstash != debstash) {
79072805 1579 SV *sv = NEWSV(85,0);
a687059c 1580
93a17b20 1581 sv_upgrade(sv, SVt_PVMG);
79072805
LW		 1582 sv_setsv(sv,linestr);
1583 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
a687059c 1584 }
463ee0b2 1585 bufend = SvPVX(linestr) + SvCUR(linestr);
79072805
LW		 1586 if (curcop->cop_line == 1) {
1587 while (s < bufend && isSPACE(*s))
1588 s++;
a0d0e21e 1589 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
79072805 1590 s++;
44a8e56a 1591 d = Nullch;
1592 if (!in_eval) {
1593 if (*s == '#' && *(s+1) == '!')
1594 d = s + 2;
1595#ifdef ALTERNATE_SHEBANG
1596 else {
1597 static char as[] = ALTERNATE_SHEBANG;
1598 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1599 d = s + (sizeof(as) - 1);
1600 }
1601#endif /* ALTERNATE_SHEBANG */
1602 }
1603 if (d) {
b8378b72 1604 char *ipath;
774d564b 1605 char *ipathend;
b8378b72 1606
774d564b 1607 while (isSPACE(*d))
b8378b72
CS		 1608 d++;
1609 ipath = d;
774d564b 1610 while (*d && !isSPACE(*d))
1611 d++;
1612 ipathend = d;
1613
1614#ifdef ARG_ZERO_IS_SCRIPT
1615 if (ipathend > ipath) {
1616 /*
1617 * HP-UX (at least) sets argv[0] to the script name,
1618 * which makes $^X incorrect. And Digital UNIX and Linux,
1619 * at least, set argv[0] to the basename of the Perl
1620 * interpreter. So, having found "#!", we'll set it right.
1621 */
1622 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1623 assert(SvPOK(x) || SvGMAGICAL(x));
9607fc9c 1624 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
774d564b 1625 sv_setpvn(x, ipath, ipathend - ipath);
9607fc9c 1626 SvSETMAGIC(x);
1627 }
774d564b 1628 TAINT_NOT; /* $^X is always tainted, but that's OK */
8ebc5c01 1629 }
774d564b 1630#endif /* ARG_ZERO_IS_SCRIPT */
b8378b72
CS		 1631
1632 /*
1633 * Look for options.
1634 */
748a9306
LW		 1635 d = instr(s,"perl -");
1636 if (!d)
1637 d = instr(s,"perl");
44a8e56a 1638#ifdef ALTERNATE_SHEBANG
1639 /*
1640 * If the ALTERNATE_SHEBANG on this system starts with a
1641 * character that can be part of a Perl expression, then if
1642 * we see it but not "perl", we're probably looking at the
1643 * start of Perl code, not a request to hand off to some
1644 * other interpreter. Similarly, if "perl" is there, but
1645 * not in the first 'word' of the line, we assume the line
1646 * contains the start of the Perl program.
44a8e56a 1647 */
1648 if (d && *s != '#') {
774d564b 1649 char *c = ipath;
44a8e56a 1650 while (*c && !strchr("; \t\r\n\f\v#", *c))
1651 c++;
1652 if (c < d)
1653 d = Nullch; /* "perl" not in first word; ignore */
1654 else
1655 *s = '#'; /* Don't try to parse shebang line */
1656 }
774d564b 1657#endif /* ALTERNATE_SHEBANG */
748a9306 1658 if (!d &&
44a8e56a 1659 *s == '#' &&
774d564b 1660 ipathend > ipath &&
748a9306
LW		 1661 !minus_c &&
1662 !instr(s,"indir") &&
1663 instr(origargv[0],"perl"))
1664 {
9f68db38 1665 char **newargv;
9f68db38 1666
774d564b 1667 *ipathend = '\0';
1668 s = ipathend + 1;
de3bb511 1669 while (s < bufend && isSPACE(*s))
9f68db38
LW		 1670 s++;
1671 if (s < bufend) {
1672 Newz(899,newargv,origargc+3,char*);
1673 newargv[1] = s;
de3bb511 1674 while (s < bufend && !isSPACE(*s))
9f68db38
LW		 1675 s++;
1676 *s = '\0';
1677 Copy(origargv+1, newargv+2, origargc+1, char*);
1678 }
1679 else
1680 newargv = origargv;
774d564b 1681 newargv[0] = ipath;
1682 execv(ipath, newargv);
1683 croak("Can't exec %s", ipath);
9f68db38 1684 }
748a9306 1685 if (d) {
ba6d6ac9
CS		 1686 U32 oldpdb = perldb;
1687 bool oldn = minus_n;
1688 bool oldp = minus_p;
748a9306
LW		 1689
1690 while (*d && !isSPACE(*d)) d++;
89bfa8cd 1691 while (*d == ' ' || *d == '\t') d++;
748a9306
LW		 1692
1693 if (*d++ == '-') {
8cc95fdb 1694 do {
1695 if (*d == 'M' || *d == 'm') {
1696 char *m = d;
1697 while (*d && !isSPACE(*d)) d++;
1698 croak("Too late for \"-%.*s\" option",
1699 (int)(d - m), m);
1700 }
1701 d = moreswitches(d);
1702 } while (d);
84902520 1703 if (PERLDB_LINE && !oldpdb ||
b084f20b 1704 ( minus_n || minus_p ) && !(oldn || oldp) )
1705 /* if we have already added "LINE: while (<>) {",
1706 we must not do it again */
748a9306
LW		 1707 {
1708 sv_setpv(linestr, "");
fd049845 1709 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
748a9306
LW		 1710 bufend = SvPVX(linestr) + SvCUR(linestr);
1711 preambled = FALSE;
84902520 1712 if (PERLDB_LINE)
748a9306
LW		 1713 (void)gv_fetchfile(origfilename);
1714 goto retry;
1715 }
a0d0e21e 1716 }
79072805 1717 }
9f68db38 1718 }
79072805 1719 }
85e6fe83 1720 if (lex_formbrack && lex_brackets <= lex_formbrack) {
a0d0e21e
LW		 1721 bufptr = s;
1722 lex_state = LEX_FORMLINE;
1723 return yylex();
ae986130 1724 }
378cc40b 1725 goto retry;
4fdae800 1726 case '\r':
54310121 1727 warn("Illegal character \\%03o (carriage return)", '\r');
1728 croak(
1729 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
4fdae800 1730 case ' ': case '\t': case '\f': case 013:
378cc40b
LW		 1731 s++;
1732 goto retry;
378cc40b 1733 case '#':
e929a76b 1734 case '\n':
79072805 1735 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
a687059c
LW		 1736 d = bufend;
1737 while (s < d && *s != '\n')
378cc40b 1738 s++;
0f85fab0 1739 if (s < d)
378cc40b 1740 s++;
463ee0b2 1741 incline(s);
85e6fe83 1742 if (lex_formbrack && lex_brackets <= lex_formbrack) {
a0d0e21e
LW		 1743 bufptr = s;
1744 lex_state = LEX_FORMLINE;
1745 return yylex();
a687059c 1746 }
378cc40b 1747 }
a687059c 1748 else {
378cc40b 1749 *s = '\0';
a687059c
LW		 1750 bufend = s;
1751 }
378cc40b
LW		 1752 goto retry;
1753 case '-':
79072805 1754 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
378cc40b 1755 s++;
748a9306
LW		 1756 bufptr = s;
1757 tmp = *s++;
1758
1759 while (s < bufend && (*s == ' ' || *s == '\t'))
1760 s++;
1761
1762 if (strnEQ(s,"=>",2)) {
1763 if (dowarn)
1764 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
ff0cee69 1765 (int)tmp, (int)tmp);
748a9306
LW		 1766 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1767 OPERATOR('-'); /* unary minus */
1768 }
e334a159 1769 last_uni = oldbufptr;
a0d0e21e 1770 last_lop_op = OP_FTEREAD; /* good enough */
748a9306 1771 switch (tmp) {
79072805
LW		 1772 case 'r': FTST(OP_FTEREAD);
1773 case 'w': FTST(OP_FTEWRITE);
1774 case 'x': FTST(OP_FTEEXEC);
1775 case 'o': FTST(OP_FTEOWNED);
1776 case 'R': FTST(OP_FTRREAD);
1777 case 'W': FTST(OP_FTRWRITE);
1778 case 'X': FTST(OP_FTREXEC);
1779 case 'O': FTST(OP_FTROWNED);
1780 case 'e': FTST(OP_FTIS);
1781 case 'z': FTST(OP_FTZERO);
1782 case 's': FTST(OP_FTSIZE);
1783 case 'f': FTST(OP_FTFILE);
1784 case 'd': FTST(OP_FTDIR);
1785 case 'l': FTST(OP_FTLINK);
1786 case 'p': FTST(OP_FTPIPE);
1787 case 'S': FTST(OP_FTSOCK);
1788 case 'u': FTST(OP_FTSUID);
1789 case 'g': FTST(OP_FTSGID);
1790 case 'k': FTST(OP_FTSVTX);
1791 case 'b': FTST(OP_FTBLK);
1792 case 'c': FTST(OP_FTCHR);
1793 case 't': FTST(OP_FTTTY);
1794 case 'T': FTST(OP_FTTEXT);
1795 case 'B': FTST(OP_FTBINARY);
85e6fe83
LW		 1796 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1797 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1798 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
378cc40b 1799 default:
ff0cee69 1800 croak("Unrecognized file test: -%c", (int)tmp);
378cc40b
LW		 1801 break;
1802 }
1803 }
a687059c
LW		 1804 tmp = *s++;
1805 if (*s == tmp) {
1806 s++;
79072805
LW		 1807 if (expect == XOPERATOR)
1808 TERM(POSTDEC);
1809 else
1810 OPERATOR(PREDEC);
1811 }
1812 else if (*s == '>') {
1813 s++;
1814 s = skipspace(s);
1815 if (isIDFIRST(*s)) {
a0d0e21e 1816 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
463ee0b2 1817 TOKEN(ARROW);
79072805 1818 }
748a9306
LW		 1819 else if (*s == '$')
1820 OPERATOR(ARROW);
463ee0b2 1821 else
748a9306 1822 TERM(ARROW);
a687059c 1823 }
79072805
LW		 1824 if (expect == XOPERATOR)
1825 Aop(OP_SUBTRACT);
1826 else {
2f3197b3
LW		 1827 if (isSPACE(*s) || !isSPACE(*bufptr))
1828 check_uni();
79072805 1829 OPERATOR('-'); /* unary minus */
2f3197b3 1830 }
79072805 1831
378cc40b 1832 case '+':
a687059c
LW		 1833 tmp = *s++;
1834 if (*s == tmp) {
378cc40b 1835 s++;
79072805
LW		 1836 if (expect == XOPERATOR)
1837 TERM(POSTINC);
1838 else
1839 OPERATOR(PREINC);
378cc40b 1840 }
79072805
LW		 1841 if (expect == XOPERATOR)
1842 Aop(OP_ADD);
1843 else {
2f3197b3
LW		 1844 if (isSPACE(*s) || !isSPACE(*bufptr))
1845 check_uni();
a687059c 1846 OPERATOR('+');
2f3197b3 1847 }
a687059c 1848
378cc40b 1849 case '*':
79072805 1850 if (expect != XOPERATOR) {
8903cb82 1851 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
463ee0b2 1852 expect = XOPERATOR;
a0d0e21e
LW		 1853 force_ident(tokenbuf, '*');
1854 if (!*tokenbuf)
1855 PREREF('*');
79072805 1856 TERM('*');
a687059c 1857 }
79072805
LW		 1858 s++;
1859 if (*s == '*') {
a687059c 1860 s++;
79072805 1861 PWop(OP_POW);
a687059c 1862 }
79072805
LW		 1863 Mop(OP_MULTIPLY);
1864
378cc40b 1865 case '%':
bbce6d69 1866 if (expect == XOPERATOR) {
1867 ++s;
1868 Mop(OP_MODULO);
a687059c 1869 }
bbce6d69 1870 tokenbuf[0] = '%';
8903cb82 1871 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
bbce6d69 1872 if (!tokenbuf[1]) {
1873 if (s == bufend)
1874 yyerror("Final % should be \\% or %name");
1875 PREREF('%');
a687059c 1876 }
bbce6d69 1877 pending_ident = '%';
1878 TERM('%');
a687059c 1879
378cc40b 1880 case '^':
79072805 1881 s++;
a0d0e21e 1882 BOop(OP_BIT_XOR);
79072805
LW		 1883 case '[':
1884 lex_brackets++;
1885 /* FALL THROUGH */
378cc40b 1886 case '~':
378cc40b 1887 case ',':
378cc40b
LW		 1888 tmp = *s++;
1889 OPERATOR(tmp);
a0d0e21e
LW		 1890 case ':':
1891 if (s[1] == ':') {
1892 len = 0;
1893 goto just_a_word;
1894 }
1895 s++;
1896 OPERATOR(':');
8990e307
LW		 1897 case '(':
1898 s++;
a0d0e21e 1899 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
8990e307 1900 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
a0d0e21e
LW		 1901 else
1902 expect = XTERM;
1903 TOKEN('(');
378cc40b 1904 case ';':
79072805
LW		 1905 if (curcop->cop_line < copline)
1906 copline = curcop->cop_line;
378cc40b
LW		 1907 tmp = *s++;
1908 OPERATOR(tmp);
1909 case ')':
378cc40b 1910 tmp = *s++;
16d20bd9
AD		 1911 s = skipspace(s);
1912 if (*s == '{')
1913 PREBLOCK(tmp);
378cc40b 1914 TERM(tmp);
79072805
LW		 1915 case ']':
1916 s++;
463ee0b2
LW		 1917 if (lex_brackets <= 0)
1918 yyerror("Unmatched right bracket");
1919 else
1920 --lex_brackets;
79072805 1921 if (lex_state == LEX_INTERPNORMAL) {
463ee0b2 1922 if (lex_brackets == 0) {
a0d0e21e 1923 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
79072805
LW		 1924 lex_state = LEX_INTERPEND;
1925 }
1926 }
4633a7c4 1927 TERM(']');
79072805
LW		 1928 case '{':
1929 leftbracket:
79072805 1930 s++;
8990e307 1931 if (lex_brackets > 100) {
89bfa8cd 1932 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
8990e307
LW		 1933 if (newlb != lex_brackstack) {
1934 SAVEFREEPV(newlb);
1935 lex_brackstack = newlb;
1936 }
1937 }
a0d0e21e
LW		 1938 switch (expect) {
1939 case XTERM:
1940 if (lex_formbrack) {
1941 s--;
1942 PRETERMBLOCK(DO);
1943 }
1944 if (oldoldbufptr == last_lop)
1945 lex_brackstack[lex_brackets++] = XTERM;
1946 else
1947 lex_brackstack[lex_brackets++] = XOPERATOR;
79072805 1948 OPERATOR(HASHBRACK);
a0d0e21e 1949 case XOPERATOR:
748a9306
LW		 1950 while (s < bufend && (*s == ' ' || *s == '\t'))
1951 s++;
44a8e56a 1952 d = s;
1953 tokenbuf[0] = '\0';
1954 if (d < bufend && *d == '-') {
1955 tokenbuf[0] = '-';
1956 d++;
1957 while (d < bufend && (*d == ' ' || *d == '\t'))
1958 d++;
1959 }
1960 if (d < bufend && isIDFIRST(*d)) {
8903cb82 1961 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
1962 FALSE, &len);
748a9306
LW		 1963 while (d < bufend && (*d == ' ' || *d == '\t'))
1964 d++;
1965 if (*d == '}') {
44a8e56a 1966 char minus = (tokenbuf[0] == '-');
748a9306 1967 if (dowarn &&
44a8e56a 1968 (keyword(tokenbuf + 1, len) ||
1969 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
1970 perl_get_cv(tokenbuf + 1, FALSE) ))
748a9306 1971 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
44a8e56a 1972 tokenbuf + !minus, tokenbuf + !minus);
1973 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
1974 if (minus)
1975 force_next('-');
748a9306
LW		 1976 }
1977 }
1978 /* FALL THROUGH */
1979 case XBLOCK:
a0d0e21e 1980 lex_brackstack[lex_brackets++] = XSTATE;
2304df62 1981 expect = XSTATE;
a0d0e21e
LW		 1982 break;
1983 case XTERMBLOCK:
1984 lex_brackstack[lex_brackets++] = XOPERATOR;
1985 expect = XSTATE;
1986 break;
1987 default: {
1988 char *t;
1989 if (oldoldbufptr == last_lop)
1990 lex_brackstack[lex_brackets++] = XTERM;
1991 else
1992 lex_brackstack[lex_brackets++] = XOPERATOR;
1993 s = skipspace(s);
1994 if (*s == '}')
1995 OPERATOR(HASHBRACK);
b8a4b1be
GS		 1996 /* This hack serves to disambiguate a pair of curlies
1997 * as being a block or an anon hash. Normally, expectation
1998 * determines that, but in cases where we're not in a
1999 * position to expect anything in particular (like inside
2000 * eval"") we have to resolve the ambiguity. This code
2001 * covers the case where the first term in the curlies is a
2002 * quoted string. Most other cases need to be explicitly
2003 * disambiguated by prepending a `+' before the opening
2004 * curly in order to force resolution as an anon hash.
2005 *
2006 * XXX should probably propagate the outer expectation
2007 * into eval"" to rely less on this hack, but that could
2008 * potentially break current behavior of eval"".
2009 * GSAR 97-07-21
2010 */
2011 t = s;
2012 if (*s == '\'' || *s == '"' || *s == '`') {
2013 /* common case: get past first string, handling escapes */
2014 for (t++; t < bufend && *t != *s;)
2015 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2016 t++;
2017 t++;
a0d0e21e 2018 }
b8a4b1be
GS		 2019 else if (*s == 'q') {
2020 if (++t < bufend
2021 && (!isALNUM(*t)
2022 || ((*t == 'q' || *t == 'x') && ++t < bufend
2023 && !isALNUM(*t)))) {
2024 char *tmps;
2025 char open, close, term;
2026 I32 brackets = 1;
2027
2028 while (t < bufend && isSPACE(*t))
2029 t++;
2030 term = *t;
2031 open = term;
2032 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2033 term = tmps[5];
2034 close = term;
2035 if (open == close)
2036 for (t++; t < bufend; t++) {
6d07e5e9 2037 if (*t == '\\' && t+1 < bufend && open != '\\')
b8a4b1be 2038 t++;
6d07e5e9 2039 else if (*t == open)
b8a4b1be
GS		 2040 break;
2041 }
2042 else
2043 for (t++; t < bufend; t++) {
6d07e5e9 2044 if (*t == '\\' && t+1 < bufend)
b8a4b1be 2045 t++;
6d07e5e9 2046 else if (*t == close && --brackets <= 0)
b8a4b1be
GS		 2047 break;
2048 else if (*t == open)
2049 brackets++;
2050 }
2051 }
2052 t++;
a0d0e21e 2053 }
b8a4b1be
GS		 2054 else if (isALPHA(*s)) {
2055 for (t++; t < bufend && isALNUM(*t); t++) ;
a0d0e21e 2056 }
a0d0e21e
LW		 2057 while (t < bufend && isSPACE(*t))
2058 t++;
b8a4b1be
GS		 2059 /* if comma follows first term, call it an anon hash */
2060 /* XXX it could be a comma expression with loop modifiers */
2061 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2062 || (*t == '=' && t[1] == '>')))
a0d0e21e
LW		 2063 OPERATOR(HASHBRACK);
2064 if (expect == XREF)
2065 expect = XTERM;
2066 else {
2067 lex_brackstack[lex_brackets-1] = XSTATE;
2068 expect = XSTATE;
2069 }
8990e307 2070 }
a0d0e21e 2071 break;
463ee0b2 2072 }
79072805
LW		 2073 yylval.ival = curcop->cop_line;
2074 if (isSPACE(*s) || *s == '#')
2075 copline = NOLINE; /* invalidate current command line number */
79072805 2076 TOKEN('{');
378cc40b 2077 case '}':
79072805
LW		 2078 rightbracket:
2079 s++;
463ee0b2
LW		 2080 if (lex_brackets <= 0)
2081 yyerror("Unmatched right bracket");
2082 else
2083 expect = (expectation)lex_brackstack[--lex_brackets];
85e6fe83
LW		 2084 if (lex_brackets < lex_formbrack)
2085 lex_formbrack = 0;
79072805 2086 if (lex_state == LEX_INTERPNORMAL) {
463ee0b2 2087 if (lex_brackets == 0) {
79072805
LW		 2088 if (lex_fakebrack) {
2089 lex_state = LEX_INTERPEND;
2090 bufptr = s;
2091 return yylex(); /* ignore fake brackets */
2092 }
fa83b5b6 2093 if (*s == '-' && s[1] == '>')
2094 lex_state = LEX_INTERPENDMAYBE;
2095 else if (*s != '[' && *s != '{')
79072805
LW		 2096 lex_state = LEX_INTERPEND;
2097 }
2098 }
748a9306
LW		 2099 if (lex_brackets < lex_fakebrack) {
2100 bufptr = s;
2101 lex_fakebrack = 0;
2102 return yylex(); /* ignore fake brackets */
2103 }
79072805
LW		 2104 force_next('}');
2105 TOKEN(';');
378cc40b
LW		 2106 case '&':
2107 s++;
2108 tmp = *s++;
2109 if (tmp == '&')
a0d0e21e 2110 AOPERATOR(ANDAND);
378cc40b 2111 s--;
463ee0b2 2112 if (expect == XOPERATOR) {
fd049845 2113 if (dowarn && isALPHA(*s) && bufptr == linestart) {
463ee0b2
LW		 2114 curcop->cop_line--;
2115 warn(warn_nosemi);
2116 curcop->cop_line++;
2117 }
79072805 2118 BAop(OP_BIT_AND);
463ee0b2 2119 }
79072805 2120
8903cb82 2121 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
463ee0b2
LW		 2122 if (*tokenbuf) {
2123 expect = XOPERATOR;
a0d0e21e 2124 force_ident(tokenbuf, '&');
463ee0b2 2125 }
79072805
LW		 2126 else
2127 PREREF('&');
c07a80fd 2128 yylval.ival = (OPpENTERSUB_AMPER<<8);
79072805
LW		 2129 TERM('&');
2130
378cc40b
LW		 2131 case '|':
2132 s++;
2133 tmp = *s++;
2134 if (tmp == '|')
a0d0e21e 2135 AOPERATOR(OROR);
378cc40b 2136 s--;
79072805 2137 BOop(OP_BIT_OR);
378cc40b
LW		 2138 case '=':
2139 s++;
2140 tmp = *s++;
2141 if (tmp == '=')
79072805
LW		 2142 Eop(OP_EQ);
2143 if (tmp == '>')
2144 OPERATOR(',');
378cc40b 2145 if (tmp == '~')
79072805 2146 PMop(OP_MATCH);
463ee0b2 2147 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
ff0cee69 2148 warn("Reversed %c= operator",(int)tmp);
378cc40b 2149 s--;
748a9306 2150 if (expect == XSTATE && isALPHA(tmp) &&
fd049845 2151 (s == linestart+1 || s[-2] == '\n') )
748a9306 2152 {
a5f75d66
AD		 2153 if (in_eval && !rsfp) {
2154 d = bufend;
2155 while (s < d) {
2156 if (*s++ == '\n') {
2157 incline(s);
2158 if (strnEQ(s,"=cut",4)) {
2159 s = strchr(s,'\n');
2160 if (s)
2161 s++;
2162 else
2163 s = d;
2164 incline(s);
2165 goto retry;
2166 }
2167 }
2168 }
2169 goto retry;
2170 }
a0d0e21e
LW		 2171 s = bufend;
2172 doextract = TRUE;
2173 goto retry;
2174 }
2175 if (lex_brackets < lex_formbrack) {
2176 char *t;
2177 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2178 if (*t == '\n' || *t == '#') {
2179 s--;
2180 expect = XBLOCK;
2181 goto leftbracket;
2182 }
79072805 2183 }
a0d0e21e
LW		 2184 yylval.ival = 0;
2185 OPERATOR(ASSIGNOP);
378cc40b
LW		 2186 case '!':
2187 s++;
2188 tmp = *s++;
2189 if (tmp == '=')
79072805 2190 Eop(OP_NE);
378cc40b 2191 if (tmp == '~')
79072805 2192 PMop(OP_NOT);
378cc40b
LW		 2193 s--;
2194 OPERATOR('!');
2195 case '<':
79072805 2196 if (expect != XOPERATOR) {
93a17b20 2197 if (s[1] != '<' && !strchr(s,'>'))
2f3197b3 2198 check_uni();
79072805
LW		 2199 if (s[1] == '<')
2200 s = scan_heredoc(s);
2201 else
2202 s = scan_inputsymbol(s);
2203 TERM(sublex_start());
378cc40b
LW		 2204 }
2205 s++;
2206 tmp = *s++;
2207 if (tmp == '<')
79072805 2208 SHop(OP_LEFT_SHIFT);
395c3793
LW		 2209 if (tmp == '=') {
2210 tmp = *s++;
2211 if (tmp == '>')
79072805 2212 Eop(OP_NCMP);
395c3793 2213 s--;
79072805 2214 Rop(OP_LE);
395c3793 2215 }
378cc40b 2216 s--;
79072805 2217 Rop(OP_LT);
378cc40b
LW		 2218 case '>':
2219 s++;
2220 tmp = *s++;
2221 if (tmp == '>')
79072805 2222 SHop(OP_RIGHT_SHIFT);
378cc40b 2223 if (tmp == '=')
79072805 2224 Rop(OP_GE);
378cc40b 2225 s--;
79072805 2226 Rop(OP_GT);
378cc40b
LW		 2227
2228 case '$':
bbce6d69 2229 CLINE;
2230
8990e307 2231 if (expect == XOPERATOR) {
a0d0e21e
LW		 2232 if (lex_formbrack && lex_brackets == lex_formbrack) {
2233 expect = XTERM;
2234 depcom();
bbce6d69 2235 return ','; /* grandfather non-comma-format format */
a0d0e21e 2236 }
8990e307 2237 }
a0d0e21e 2238
bbce6d69 2239 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2240 if (expect == XOPERATOR)
2241 no_op("Array length", bufptr);
2242 tokenbuf[0] = '@';
8903cb82 2243 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2244 FALSE);
bbce6d69 2245 if (!tokenbuf[1])
a0d0e21e 2246 PREREF(DOLSHARP);
463ee0b2 2247 expect = XOPERATOR;
bbce6d69 2248 pending_ident = '#';
463ee0b2 2249 TOKEN(DOLSHARP);
79072805 2250 }
bbce6d69 2251
2252 if (expect == XOPERATOR)
2253 no_op("Scalar", bufptr);
2254 tokenbuf[0] = '$';
8903cb82 2255 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
bbce6d69 2256 if (!tokenbuf[1]) {
2257 if (s == bufend)
2258 yyerror("Final $ should be \\$ or $name");
2259 PREREF('$');
8990e307 2260 }
a0d0e21e 2261
bbce6d69 2262 /* This kludge not intended to be bulletproof. */
2263 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2264 yylval.opval = newSVOP(OP_CONST, 0,
2265 newSViv((IV)compiling.cop_arybase));
2266 yylval.opval->op_private = OPpCONST_ARYBASE;
2267 TERM(THING);
2268 }
2269
ff68c719 2270 d = s;
2271 if (lex_state == LEX_NORMAL)
2272 s = skipspace(s);
2273
bbce6d69 2274 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2275 char *t;
2276 if (*s == '[') {
2277 tokenbuf[0] = '@';
2278 if (dowarn) {
2279 for(t = s + 1;
2280 isSPACE(*t) || isALNUM(*t) || *t == '$';
2281 t++) ;
a0d0e21e
LW		 2282 if (*t++ == ',') {
2283 bufptr = skipspace(bufptr);
bbce6d69 2284 while (t < bufend && *t != ']')
2285 t++;
a0d0e21e 2286 warn("Multidimensional syntax %.*s not supported",
bbce6d69 2287 (t - bufptr) + 1, bufptr);
a0d0e21e
LW		 2288 }
2289 }
bbce6d69 2290 }
2291 else if (*s == '{') {
2292 tokenbuf[0] = '%';
2293 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2294 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2295 {
8903cb82 2296 char tmpbuf[sizeof tokenbuf];
a0d0e21e
LW		 2297 STRLEN len;
2298 for (t++; isSPACE(*t); t++) ;
748a9306 2299 if (isIDFIRST(*t)) {
8903cb82 2300 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
748a9306
LW		 2301 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2302 warn("You need to quote \"%s\"", tmpbuf);
2303 }
93a17b20
LW		 2304 }
2305 }
2f3197b3 2306 }
bbce6d69 2307
2308 expect = XOPERATOR;
ff68c719 2309 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
bbce6d69 2310 bool islop = (last_lop == oldoldbufptr);
bbce6d69 2311 if (!islop || last_lop_op == OP_GREPSTART)
2312 expect = XOPERATOR;
2313 else if (strchr("$@\"'`q", *s))
2314 expect = XTERM; /* e.g. print $fh "foo" */
2315 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2316 expect = XTERM; /* e.g. print $fh &sub */
68dc0745 2317 else if (isIDFIRST(*s)) {
8903cb82 2318 char tmpbuf[sizeof tokenbuf];
2319 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
84902520
TB		 2320 if (tmp = keyword(tmpbuf, len)) {
2321 /* binary operators exclude handle interpretations */
2322 switch (tmp) {
2323 case -KEY_x:
2324 case -KEY_eq:
2325 case -KEY_ne:
2326 case -KEY_gt:
2327 case -KEY_lt:
2328 case -KEY_ge:
2329 case -KEY_le:
2330 case -KEY_cmp:
2331 break;
2332 default:
2333 expect = XTERM; /* e.g. print $fh length() */
2334 break;
2335 }
2336 }
68dc0745 2337 else {
2338 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2339 if (gv && GvCVu(gv))
2340 expect = XTERM; /* e.g. print $fh subr() */
93a17b20 2341 }
93a17b20 2342 }
bbce6d69 2343 else if (isDIGIT(*s))
2344 expect = XTERM; /* e.g. print $fh 3 */
2345 else if (*s == '.' && isDIGIT(s[1]))
2346 expect = XTERM; /* e.g. print $fh .3 */
2347 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2348 expect = XTERM; /* e.g. print $fh -1 */
2349 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2350 expect = XTERM; /* print $fh <<"EOF" */
2351 }
2352 pending_ident = '$';
79072805 2353 TOKEN('$');
378cc40b
LW		 2354
2355 case '@':
8990e307 2356 if (expect == XOPERATOR)
bbce6d69 2357 no_op("Array", s);
2358 tokenbuf[0] = '@';
8903cb82 2359 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
bbce6d69 2360 if (!tokenbuf[1]) {
2361 if (s == bufend)
2362 yyerror("Final @ should be \\@ or @name");
2363 PREREF('@');
2364 }
ff68c719 2365 if (lex_state == LEX_NORMAL)
2366 s = skipspace(s);
bbce6d69 2367 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2368 if (*s == '{')
2369 tokenbuf[0] = '%';
a0d0e21e
LW		 2370
2371 /* Warn about @ where they meant $. */
2372 if (dowarn) {
2373 if (*s == '[' || *s == '{') {
2374 char *t = s + 1;
2375 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2376 t++;
2377 if (*t == '}' || *t == ']') {
2378 t++;
2379 bufptr = skipspace(bufptr);
2380 warn("Scalar value %.*s better written as $%.*s",
2381 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2382 }
93a17b20
LW		 2383 }
2384 }
463ee0b2 2385 }
bbce6d69 2386 pending_ident = '@';
79072805 2387 TERM('@');
378cc40b
LW		 2388
2389 case '/': /* may either be division or pattern */
2390 case '?': /* may either be conditional or pattern */
79072805 2391 if (expect != XOPERATOR) {
2f3197b3 2392 check_uni();
79072805
LW		 2393 s = scan_pat(s);
2394 TERM(sublex_start());
378cc40b
LW		 2395 }
2396 tmp = *s++;
a687059c 2397 if (tmp == '/')
79072805 2398 Mop(OP_DIVIDE);
378cc40b
LW		 2399 OPERATOR(tmp);
2400
2401 case '.':
748a9306 2402 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
fd049845 2403 (s == linestart || s[-1] == '\n') ) {
85e6fe83 2404 lex_formbrack = 0;
8990e307 2405 expect = XSTATE;
79072805
LW		 2406 goto rightbracket;
2407 }
2408 if (expect == XOPERATOR || !isDIGIT(s[1])) {
378cc40b 2409 tmp = *s++;
a687059c
LW		 2410 if (*s == tmp) {
2411 s++;
2f3197b3
LW		 2412 if (*s == tmp) {
2413 s++;
79072805 2414 yylval.ival = OPf_SPECIAL;
2f3197b3
LW		 2415 }
2416 else
79072805 2417 yylval.ival = 0;
378cc40b 2418 OPERATOR(DOTDOT);
a687059c 2419 }
79072805 2420 if (expect != XOPERATOR)
2f3197b3 2421 check_uni();
79072805 2422 Aop(OP_CONCAT);
378cc40b
LW		 2423 }
2424 /* FALL THROUGH */
2425 case '0': case '1': case '2': case '3': case '4':
2426 case '5': case '6': case '7': case '8': case '9':
79072805 2427 s = scan_num(s);
8990e307
LW		 2428 if (expect == XOPERATOR)
2429 no_op("Number",s);
79072805
LW		 2430 TERM(THING);
2431
2432 case '\'':
8990e307 2433 s = scan_str(s);
463ee0b2 2434 if (expect == XOPERATOR) {
a0d0e21e
LW		 2435 if (lex_formbrack && lex_brackets == lex_formbrack) {
2436 expect = XTERM;
2437 depcom();
2438 return ','; /* grandfather non-comma-format format */
2439 }
463ee0b2 2440 else
8990e307 2441 no_op("String",s);
463ee0b2 2442 }
79072805 2443 if (!s)
85e6fe83 2444 missingterm((char*)0);
79072805
LW		 2445 yylval.ival = OP_CONST;
2446 TERM(sublex_start());
2447
2448 case '"':
8990e307 2449 s = scan_str(s);
463ee0b2 2450 if (expect == XOPERATOR) {
a0d0e21e
LW		 2451 if (lex_formbrack && lex_brackets == lex_formbrack) {
2452 expect = XTERM;
2453 depcom();
2454 return ','; /* grandfather non-comma-format format */
2455 }
463ee0b2 2456 else
8990e307 2457 no_op("String",s);
463ee0b2 2458 }
79072805 2459 if (!s)
85e6fe83 2460 missingterm((char*)0);
4633a7c4
LW		 2461 yylval.ival = OP_CONST;
2462 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2463 if (*d == '$' || *d == '@' || *d == '\\') {
2464 yylval.ival = OP_STRINGIFY;
2465 break;
2466 }
2467 }
79072805
LW		 2468 TERM(sublex_start());
2469
2470 case '`':
2471 s = scan_str(s);
8990e307
LW		 2472 if (expect == XOPERATOR)
2473 no_op("Backticks",s);
79072805 2474 if (!s)
85e6fe83 2475 missingterm((char*)0);
79072805
LW		 2476 yylval.ival = OP_BACKTICK;
2477 set_csh();
2478 TERM(sublex_start());
2479
2480 case '\\':
2481 s++;
748a9306
LW		 2482 if (dowarn && lex_inwhat && isDIGIT(*s))
2483 warn("Can't use \\%c to mean $%c in expression", *s, *s);
8990e307
LW		 2484 if (expect == XOPERATOR)
2485 no_op("Backslash",s);
79072805
LW		 2486 OPERATOR(REFGEN);
2487
2488 case 'x':
2489 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2490 s++;
2491 Mop(OP_REPEAT);
2f3197b3 2492 }
79072805
LW		 2493 goto keylookup;
2494
378cc40b 2495 case '_':
79072805
LW		 2496 case 'a': case 'A':
2497 case 'b': case 'B':
2498 case 'c': case 'C':
2499 case 'd': case 'D':
2500 case 'e': case 'E':
2501 case 'f': case 'F':
2502 case 'g': case 'G':
2503 case 'h': case 'H':
2504 case 'i': case 'I':
2505 case 'j': case 'J':
2506 case 'k': case 'K':
2507 case 'l': case 'L':
2508 case 'm': case 'M':
2509 case 'n': case 'N':
2510 case 'o': case 'O':
2511 case 'p': case 'P':
2512 case 'q': case 'Q':
2513 case 'r': case 'R':
2514 case 's': case 'S':
2515 case 't': case 'T':
2516 case 'u': case 'U':
2517 case 'v': case 'V':
2518 case 'w': case 'W':
2519 case 'X':
2520 case 'y': case 'Y':
2521 case 'z': case 'Z':
2522
49dc05e3
GS		 2523 keylookup: {
2524 GV *gv = Nullgv;
2525 GV **gvp = 0;
2526
748a9306 2527 bufptr = s;
8903cb82 2528 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
8ebc5c01 2529
2530 /* Some keywords can be followed by any delimiter, including ':' */
2531 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2532 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2533 (tokenbuf[0] == 'q' &&
2534 strchr("qwx", tokenbuf[1]))));
2535
2536 /* x::* is just a word, unless x is "CORE" */
2537 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
4633a7c4
LW		 2538 goto just_a_word;
2539
3643fb5f
CS		 2540 d = s;
2541 while (d < bufend && isSPACE(*d))
2542 d++; /* no comments skipped here, or s### is misparsed */
2543
2544 /* Is this a label? */
8ebc5c01 2545 if (!tmp && expect == XSTATE
2546 && d < bufend && *d == ':' && *(d + 1) != ':') {
2547 s = d + 1;
2548 yylval.pval = savepv(tokenbuf);
2549 CLINE;
2550 TOKEN(LABEL);
3643fb5f
CS		 2551 }
2552
2553 /* Check for keywords */
a0d0e21e 2554 tmp = keyword(tokenbuf, len);
748a9306
LW		 2555
2556 /* Is this a word before a => operator? */
748a9306
LW		 2557 if (strnEQ(d,"=>",2)) {
2558 CLINE;
2559 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2560 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2561 tokenbuf, tokenbuf);
2562 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2563 yylval.opval->op_private = OPpCONST_BARE;
2564 TERM(WORD);
2565 }
2566
a0d0e21e 2567 if (tmp < 0) { /* second-class keyword? */
49dc05e3
GS		 2568 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2569 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2570 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2571 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2572 (gv = *gvp) != (GV*)&sv_undef &&
2573 GvCVu(gv) && GvIMPORTED_CV(gv))))
a0d0e21e 2574 {
6e7b2336
GS		 2575 tmp = 0; /* overridden by importation */
2576 }
2577 else if (gv && !gvp
2578 && -tmp==KEY_lock /* XXX generalizable kludge */
1d64a758 2579 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
6e7b2336
GS		 2580 {
2581 tmp = 0; /* any sub overrides "weak" keyword */
a0d0e21e 2582 }
49dc05e3
GS		 2583 else {
2584 tmp = -tmp; gv = Nullgv; gvp = 0;
2585 }
a0d0e21e
LW		 2586 }
2587
2588 reserved_word:
2589 switch (tmp) {
79072805
LW		 2590
2591 default: /* not a keyword */
93a17b20 2592 just_a_word: {
96e4d5b1 2593 SV *sv;
748a9306 2594 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
8990e307
LW		 2595
2596 /* Get the rest if it looks like a package qualifier */
2597
a0d0e21e 2598 if (*s == '\'' || *s == ':' && s[1] == ':') {
8903cb82 2599 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2600 TRUE, &len);
a0d0e21e
LW		 2601 if (!len)
2602 croak("Bad name after %s::", tokenbuf);
2603 }
8990e307 2604
3643fb5f 2605 if (expect == XOPERATOR) {
fd049845 2606 if (bufptr == linestart) {
463ee0b2
LW		 2607 curcop->cop_line--;
2608 warn(warn_nosemi);
2609 curcop->cop_line++;
2610 }
2611 else
54310121 2612 no_op("Bareword",s);
463ee0b2 2613 }
8990e307
LW		 2614
2615 /* Look for a subroutine with this name in current package. */
2616
49dc05e3
GS		 2617 if (gvp) {
2618 sv = newSVpv("CORE::GLOBAL::",14);
2619 sv_catpv(sv,tokenbuf);
2620 }
2621 else
2622 sv = newSVpv(tokenbuf,0);
2623 if (!gv)
2624 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
8990e307 2625
a0d0e21e
LW		 2626 /* Presume this is going to be a bareword of some sort. */
2627
2628 CLINE;
49dc05e3 2629 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
a0d0e21e
LW		 2630 yylval.opval->op_private = OPpCONST_BARE;
2631
8990e307
LW		 2632 /* See if it's the indirect object for a list operator. */
2633
a0d0e21e
LW		 2634 if (oldoldbufptr &&
2635 oldoldbufptr < bufptr &&
2636 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2637 /* NO SKIPSPACE BEFORE HERE! */
2638 (expect == XREF ||
4e35701f 2639 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
a0d0e21e 2640 {
748a9306
LW		 2641 bool immediate_paren = *s == '(';
2642
a0d0e21e
LW		 2643 /* (Now we can afford to cross potential line boundary.) */
2644 s = skipspace(s);
2645
2646 /* Two barewords in a row may indicate method call. */
2647
2648 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2649 return tmp;
2650
2651 /* If not a declared subroutine, it's an indirect object. */
2652 /* (But it's an indir obj regardless for sort.) */
2653
8e07c86e 2654 if ((last_lop_op == OP_SORT ||
8ebc5c01 2655 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
8e07c86e 2656 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
748a9306
LW		 2657 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2658 goto bareword;
93a17b20
LW		 2659 }
2660 }
8990e307
LW		 2661
2662 /* If followed by a paren, it's certainly a subroutine. */
2663
2664 expect = XOPERATOR;
2665 s = skipspace(s);
93a17b20 2666 if (*s == '(') {
79072805 2667 CLINE;
96e4d5b1 2668 if (gv && GvCVu(gv)) {
2669 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2670 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2671 s = d + 1;
2672 goto its_constant;
2673 }
2674 }
a0d0e21e 2675 nextval[nexttoke].opval = yylval.opval;
463ee0b2 2676 expect = XOPERATOR;
93a17b20 2677 force_next(WORD);
c07a80fd 2678 yylval.ival = 0;
463ee0b2 2679 TOKEN('&');
79072805 2680 }
93a17b20 2681
a0d0e21e 2682 /* If followed by var or block, call it a method (unless sub) */
8990e307 2683
8ebc5c01 2684 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
463ee0b2 2685 last_lop = oldbufptr;
8990e307 2686 last_lop_op = OP_METHOD;
93a17b20 2687 PREBLOCK(METHOD);
463ee0b2
LW		 2688 }
2689
8990e307
LW		 2690 /* If followed by a bareword, see if it looks like indir obj. */
2691
a0d0e21e
LW		 2692 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2693 return tmp;
93a17b20 2694
8990e307
LW		 2695 /* Not a method, so call it a subroutine (if defined) */
2696
8ebc5c01 2697 if (gv && GvCVu(gv)) {
46fc3d4c 2698 CV* cv;
748a9306 2699 if (lastchar == '-')
c2960299 2700 warn("Ambiguous use of -%s resolved as -&%s()",
748a9306 2701 tokenbuf, tokenbuf);
8990e307 2702 last_lop = oldbufptr;
a0d0e21e 2703 last_lop_op = OP_ENTERSUB;
89bfa8cd 2704 /* Check for a constant sub */
46fc3d4c 2705 cv = GvCV(gv);
96e4d5b1 2706 if ((sv = cv_const_sv(cv))) {
2707 its_constant:
2708 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2709 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2710 yylval.opval->op_private = 0;
2711 TOKEN(WORD);
89bfa8cd 2712 }
2713
a5f75d66
AD		 2714 /* Resolve to GV now. */
2715 op_free(yylval.opval);
2716 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
4633a7c4
LW		 2717 /* Is there a prototype? */
2718 if (SvPOK(cv)) {
2719 STRLEN len;
2720 char *proto = SvPV((SV*)cv, len);
2721 if (!len)
2722 TERM(FUNC0SUB);
2723 if (strEQ(proto, "$"))
2724 OPERATOR(UNIOPSUB);
2725 if (*proto == '&' && *s == '{') {
2726 sv_setpv(subname,"__ANON__");
2727 PREBLOCK(LSTOPSUB);
2728 }
2729 }
a5f75d66 2730 nextval[nexttoke].opval = yylval.opval;
8990e307
LW		 2731 expect = XTERM;
2732 force_next(WORD);
2733 TOKEN(NOAMP);
2734 }
748a9306
LW		 2735
2736 if (hints & HINT_STRICT_SUBS &&
2737 lastchar != '-' &&
a0d0e21e 2738 strnNE(s,"->",2) &&
9b01e405 2739 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
a0d0e21e
LW		 2740 last_lop_op != OP_ACCEPT &&
2741 last_lop_op != OP_PIPE_OP &&
2742 last_lop_op != OP_SOCKPAIR)
2743 {
2744 warn(
2745 "Bareword \"%s\" not allowed while \"strict subs\" in use",
85e6fe83
LW		 2746 tokenbuf);
2747 ++error_count;
2748 }
8990e307
LW		 2749
2750 /* Call it a bare word */
2751
748a9306
LW		 2752 bareword:
2753 if (dowarn) {
2754 if (lastchar != '-') {
2755 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2756 if (!*d)
2757 warn(warn_reserved, tokenbuf);
2758 }
2759 }
2760 if (lastchar && strchr("*%&", lastchar)) {
2761 warn("Operator or semicolon missing before %c%s",
2762 lastchar, tokenbuf);
c2960299 2763 warn("Ambiguous use of %c resolved as operator %c",
748a9306
LW		 2764 lastchar, lastchar);
2765 }
93a17b20 2766 TOKEN(WORD);
79072805 2767 }
79072805 2768
68dc0745 2769 case KEY___FILE__:
46fc3d4c 2770 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2771 newSVsv(GvSV(curcop->cop_filegv)));
2772 TERM(THING);
2773
79072805 2774 case KEY___LINE__:
46fc3d4c 2775 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2776 newSVpvf("%ld", (long)curcop->cop_line));
79072805 2777 TERM(THING);
68dc0745 2778
2779 case KEY___PACKAGE__:
2780 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2781 (curstash
2782 ? newSVsv(curstname)
2783 : &sv_undef));
79072805 2784 TERM(THING);
79072805 2785
e50aee73 2786 case KEY___DATA__:
79072805
LW		 2787 case KEY___END__: {
2788 GV *gv;
79072805
LW		 2789
2790 /*SUPPRESS 560*/
a5f75d66 2791 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
e50aee73
AD		 2792 char *pname = "main";
2793 if (tokenbuf[2] == 'D')
2794 pname = HvNAME(curstash ? curstash : defstash);
46fc3d4c 2795 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
a5f75d66 2796 GvMULTI_on(gv);
79072805 2797 if (!GvIO(gv))
a0d0e21e
LW		 2798 GvIOp(gv) = newIO();
2799 IoIFP(GvIOp(gv)) = rsfp;
2800#if defined(HAS_FCNTL) && defined(F_SETFD)
2801 {
760ac839 2802 int fd = PerlIO_fileno(rsfp);
a0d0e21e
LW		 2803 fcntl(fd,F_SETFD,fd >= 3);
2804 }
79072805 2805#endif
fd049845 2806 /* Mark this internal pseudo-handle as clean */
2807 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
79072805 2808 if (preprocess)
a0d0e21e 2809 IoTYPE(GvIOp(gv)) = '|';
760ac839 2810 else if ((PerlIO*)rsfp == PerlIO_stdin())
a0d0e21e 2811 IoTYPE(GvIOp(gv)) = '-';
79072805 2812 else
a0d0e21e 2813 IoTYPE(GvIOp(gv)) = '<';
79072805
LW		 2814 rsfp = Nullfp;
2815 }
2816 goto fake_eof;
e929a76b 2817 }
de3bb511 2818
8990e307 2819 case KEY_AUTOLOAD:
ed6116ce 2820 case KEY_DESTROY:
79072805
LW		 2821 case KEY_BEGIN:
2822 case KEY_END:
7d07dbc2 2823 case KEY_INIT:
a0d0e21e 2824 if (expect == XSTATE) {
93a17b20
LW		 2825 s = bufptr;
2826 goto really_sub;
79072805
LW		 2827 }
2828 goto just_a_word;
2829
a0d0e21e
LW		 2830 case KEY_CORE:
2831 if (*s == ':' && s[1] == ':') {
2832 s += 2;
748a9306 2833 d = s;
8903cb82 2834 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
a0d0e21e
LW		 2835 tmp = keyword(tokenbuf, len);
2836 if (tmp < 0)
2837 tmp = -tmp;
2838 goto reserved_word;
2839 }
2840 goto just_a_word;
2841
463ee0b2
LW		 2842 case KEY_abs:
2843 UNI(OP_ABS);
2844
79072805
LW		 2845 case KEY_alarm:
2846 UNI(OP_ALARM);
2847
2848 case KEY_accept:
a0d0e21e 2849 LOP(OP_ACCEPT,XTERM);
79072805 2850
463ee0b2
LW		 2851 case KEY_and:
2852 OPERATOR(ANDOP);
2853
79072805 2854 case KEY_atan2:
a0d0e21e 2855 LOP(OP_ATAN2,XTERM);
85e6fe83 2856
79072805 2857 case KEY_bind:
a0d0e21e 2858 LOP(OP_BIND,XTERM);
79072805
LW		 2859
2860 case KEY_binmode:
2861 UNI(OP_BINMODE);
2862
2863 case KEY_bless:
a0d0e21e 2864 LOP(OP_BLESS,XTERM);
79072805
LW		 2865
2866 case KEY_chop:
2867 UNI(OP_CHOP);
2868
2869 case KEY_continue:
2870 PREBLOCK(CONTINUE);
2871
2872 case KEY_chdir:
85e6fe83 2873 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
79072805
LW		 2874 UNI(OP_CHDIR);
2875
2876 case KEY_close:
2877 UNI(OP_CLOSE);
2878
2879 case KEY_closedir:
2880 UNI(OP_CLOSEDIR);
2881
2882 case KEY_cmp:
2883 Eop(OP_SCMP);
2884
2885 case KEY_caller:
2886 UNI(OP_CALLER);
2887
2888 case KEY_crypt:
2889#ifdef FCRYPT
de3bb511
LW		 2890 if (!cryptseen++)
2891 init_des();
a687059c 2892#endif
a0d0e21e 2893 LOP(OP_CRYPT,XTERM);
79072805
LW		 2894
2895 case KEY_chmod:
748a9306
LW		 2896 if (dowarn) {
2897 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2898 if (*d != '0' && isDIGIT(*d))
2899 yywarn("chmod: mode argument is missing initial 0");
2900 }
a0d0e21e 2901 LOP(OP_CHMOD,XTERM);
79072805
LW		 2902
2903 case KEY_chown:
a0d0e21e 2904 LOP(OP_CHOWN,XTERM);
79072805
LW		 2905
2906 case KEY_connect:
a0d0e21e 2907 LOP(OP_CONNECT,XTERM);
79072805 2908
463ee0b2
LW		 2909 case KEY_chr:
2910 UNI(OP_CHR);
2911
79072805
LW		 2912 case KEY_cos:
2913 UNI(OP_COS);
2914
2915 case KEY_chroot:
2916 UNI(OP_CHROOT);
2917
2918 case KEY_do:
2919 s = skipspace(s);
2920 if (*s == '{')
a0d0e21e 2921 PRETERMBLOCK(DO);
79072805 2922 if (*s != '\'')
a0d0e21e 2923 s = force_word(s,WORD,FALSE,TRUE,FALSE);
378cc40b 2924 OPERATOR(DO);
79072805
LW		 2925
2926 case KEY_die:
a0d0e21e
LW		 2927 hints |= HINT_BLOCK_SCOPE;
2928 LOP(OP_DIE,XTERM);
79072805
LW		 2929
2930 case KEY_defined:
2931 UNI(OP_DEFINED);
2932
2933 case KEY_delete:
a0d0e21e 2934 UNI(OP_DELETE);
79072805
LW		 2935
2936 case KEY_dbmopen:
a0d0e21e
LW		 2937 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2938 LOP(OP_DBMOPEN,XTERM);
79072805
LW		 2939
2940 case KEY_dbmclose:
2941 UNI(OP_DBMCLOSE);
2942
2943 case KEY_dump:
a0d0e21e 2944 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW		 2945 LOOPX(OP_DUMP);
2946
2947 case KEY_else:
2948 PREBLOCK(ELSE);
2949
2950 case KEY_elsif:
2951 yylval.ival = curcop->cop_line;
2952 OPERATOR(ELSIF);
2953
2954 case KEY_eq:
2955 Eop(OP_SEQ);
2956
a0d0e21e
LW		 2957 case KEY_exists:
2958 UNI(OP_EXISTS);
2959
79072805
LW		 2960 case KEY_exit:
2961 UNI(OP_EXIT);
2962
2963 case KEY_eval:
79072805 2964 s = skipspace(s);
a0d0e21e 2965 expect = (*s == '{') ? XTERMBLOCK : XTERM;
463ee0b2 2966 UNIBRACK(OP_ENTEREVAL);
79072805
LW		 2967
2968 case KEY_eof:
2969 UNI(OP_EOF);
2970
2971 case KEY_exp:
2972 UNI(OP_EXP);
2973
2974 case KEY_each:
2975 UNI(OP_EACH);
2976
2977 case KEY_exec:
2978 set_csh();
a0d0e21e 2979 LOP(OP_EXEC,XREF);
79072805
LW		 2980
2981 case KEY_endhostent:
2982 FUN0(OP_EHOSTENT);
2983
2984 case KEY_endnetent:
2985 FUN0(OP_ENETENT);
2986
2987 case KEY_endservent:
2988 FUN0(OP_ESERVENT);
2989
2990 case KEY_endprotoent:
2991 FUN0(OP_EPROTOENT);
2992
2993 case KEY_endpwent:
2994 FUN0(OP_EPWENT);
2995
2996 case KEY_endgrent:
2997 FUN0(OP_EGRENT);
2998
2999 case KEY_for:
3000 case KEY_foreach:
3001 yylval.ival = curcop->cop_line;
55497cff 3002 s = skipspace(s);
3003 if (isIDFIRST(*s)) {
3004 char *p = s;
3005 if ((bufend - p) >= 3 &&
3006 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3007 p += 2;
3008 p = skipspace(p);
3009 if (isIDFIRST(*p))
3010 croak("Missing $ on loop variable");
3011 }
79072805
LW		 3012 OPERATOR(FOR);
3013
3014 case KEY_formline:
a0d0e21e 3015 LOP(OP_FORMLINE,XTERM);
79072805
LW		 3016
3017 case KEY_fork:
3018 FUN0(OP_FORK);
3019
3020 case KEY_fcntl:
a0d0e21e 3021 LOP(OP_FCNTL,XTERM);
79072805
LW		 3022
3023 case KEY_fileno:
3024 UNI(OP_FILENO);
3025
3026 case KEY_flock:
a0d0e21e 3027 LOP(OP_FLOCK,XTERM);
79072805
LW		 3028
3029 case KEY_gt:
3030 Rop(OP_SGT);
3031
3032 case KEY_ge:
3033 Rop(OP_SGE);
3034
3035 case KEY_grep:
a0d0e21e 3036 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
79072805
LW		 3037
3038 case KEY_goto:
a0d0e21e 3039 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW		 3040 LOOPX(OP_GOTO);
3041
3042 case KEY_gmtime:
3043 UNI(OP_GMTIME);
3044
3045 case KEY_getc:
3046 UNI(OP_GETC);
3047
3048 case KEY_getppid:
3049 FUN0(OP_GETPPID);
3050
3051 case KEY_getpgrp:
3052 UNI(OP_GETPGRP);
3053
3054 case KEY_getpriority:
a0d0e21e 3055 LOP(OP_GETPRIORITY,XTERM);
79072805
LW		 3056
3057 case KEY_getprotobyname:
3058 UNI(OP_GPBYNAME);
3059
3060 case KEY_getprotobynumber:
a0d0e21e 3061 LOP(OP_GPBYNUMBER,XTERM);
79072805
LW		 3062
3063 case KEY_getprotoent:
3064 FUN0(OP_GPROTOENT);
3065
3066 case KEY_getpwent:
3067 FUN0(OP_GPWENT);
3068
3069 case KEY_getpwnam:
ff68c719 3070 UNI(OP_GPWNAM);
79072805
LW		 3071
3072 case KEY_getpwuid:
ff68c719 3073 UNI(OP_GPWUID);
79072805
LW		 3074
3075 case KEY_getpeername:
3076 UNI(OP_GETPEERNAME);
3077
3078 case KEY_gethostbyname:
3079 UNI(OP_GHBYNAME);
3080
3081 case KEY_gethostbyaddr:
a0d0e21e 3082 LOP(OP_GHBYADDR,XTERM);
79072805
LW		 3083
3084 case KEY_gethostent:
3085 FUN0(OP_GHOSTENT);
3086
3087 case KEY_getnetbyname:
3088 UNI(OP_GNBYNAME);
3089
3090 case KEY_getnetbyaddr:
a0d0e21e 3091 LOP(OP_GNBYADDR,XTERM);
79072805
LW		 3092
3093 case KEY_getnetent:
3094 FUN0(OP_GNETENT);
3095
3096 case KEY_getservbyname:
a0d0e21e 3097 LOP(OP_GSBYNAME,XTERM);
79072805
LW		 3098
3099 case KEY_getservbyport:
a0d0e21e 3100 LOP(OP_GSBYPORT,XTERM);
79072805
LW		 3101
3102 case KEY_getservent:
3103 FUN0(OP_GSERVENT);
3104
3105 case KEY_getsockname:
3106 UNI(OP_GETSOCKNAME);
3107
3108 case KEY_getsockopt:
a0d0e21e 3109 LOP(OP_GSOCKOPT,XTERM);
79072805
LW		 3110
3111 case KEY_getgrent:
3112 FUN0(OP_GGRENT);
3113
3114 case KEY_getgrnam:
ff68c719 3115 UNI(OP_GGRNAM);
79072805
LW		 3116
3117 case KEY_getgrgid:
ff68c719 3118 UNI(OP_GGRGID);
79072805
LW		 3119
3120 case KEY_getlogin:
3121 FUN0(OP_GETLOGIN);
3122
93a17b20 3123 case KEY_glob:
a0d0e21e
LW		 3124 set_csh();
3125 LOP(OP_GLOB,XTERM);
93a17b20 3126
79072805
LW		 3127 case KEY_hex:
3128 UNI(OP_HEX);
3129
3130 case KEY_if:
3131 yylval.ival = curcop->cop_line;
3132 OPERATOR(IF);
3133
3134 case KEY_index:
a0d0e21e 3135 LOP(OP_INDEX,XTERM);
79072805
LW		 3136
3137 case KEY_int:
3138 UNI(OP_INT);
3139
3140 case KEY_ioctl:
a0d0e21e 3141 LOP(OP_IOCTL,XTERM);
79072805
LW		 3142
3143 case KEY_join:
a0d0e21e 3144 LOP(OP_JOIN,XTERM);
79072805
LW		 3145
3146 case KEY_keys:
3147 UNI(OP_KEYS);
3148
3149 case KEY_kill:
a0d0e21e 3150 LOP(OP_KILL,XTERM);
79072805
LW		 3151
3152 case KEY_last:
a0d0e21e 3153 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805 3154 LOOPX(OP_LAST);
a0d0e21e 3155
79072805
LW		 3156 case KEY_lc:
3157 UNI(OP_LC);
3158
3159 case KEY_lcfirst:
3160 UNI(OP_LCFIRST);
3161
3162 case KEY_local:
3163 OPERATOR(LOCAL);
3164
3165 case KEY_length:
3166 UNI(OP_LENGTH);
3167
3168 case KEY_lt:
3169 Rop(OP_SLT);
3170
3171 case KEY_le:
3172 Rop(OP_SLE);
3173
3174 case KEY_localtime:
3175 UNI(OP_LOCALTIME);
3176
3177 case KEY_log:
3178 UNI(OP_LOG);
3179
3180 case KEY_link:
a0d0e21e 3181 LOP(OP_LINK,XTERM);
79072805
LW		 3182
3183 case KEY_listen:
a0d0e21e 3184 LOP(OP_LISTEN,XTERM);
79072805 3185
c0329465
MB		 3186 case KEY_lock:
3187 UNI(OP_LOCK);
3188
79072805
LW		 3189 case KEY_lstat:
3190 UNI(OP_LSTAT);
3191
3192 case KEY_m:
3193 s = scan_pat(s);
3194 TERM(sublex_start());
3195
a0d0e21e
LW		 3196 case KEY_map:
3197 LOP(OP_MAPSTART,XREF);
3198
79072805 3199 case KEY_mkdir:
a0d0e21e 3200 LOP(OP_MKDIR,XTERM);
79072805
LW		 3201
3202 case KEY_msgctl:
a0d0e21e 3203 LOP(OP_MSGCTL,XTERM);
79072805
LW		 3204
3205 case KEY_msgget:
a0d0e21e 3206 LOP(OP_MSGGET,XTERM);
79072805
LW		 3207
3208 case KEY_msgrcv:
a0d0e21e 3209 LOP(OP_MSGRCV,XTERM);
79072805
LW		 3210
3211 case KEY_msgsnd:
a0d0e21e 3212 LOP(OP_MSGSND,XTERM);
79072805 3213
93a17b20
LW		 3214 case KEY_my:
3215 in_my = TRUE;
c750a3ec
MB		 3216 s = skipspace(s);
3217 if (isIDFIRST(*s)) {
97fcbf96 3218 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
c750a3ec
MB		 3219 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3220 if (!in_my_stash) {
3221 char tmpbuf[1024];
3222 bufptr = s;
3223 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3224 yyerror(tmpbuf);
3225 }
3226 }
55497cff 3227 OPERATOR(MY);
93a17b20 3228
79072805 3229 case KEY_next:
a0d0e21e 3230 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW		 3231 LOOPX(OP_NEXT);
3232
3233 case KEY_ne:
3234 Eop(OP_SNE);
3235
a0d0e21e
LW		 3236 case KEY_no:
3237 if (expect != XSTATE)
3238 yyerror("\"no\" not allowed in expression");
3239 s = force_word(s,WORD,FALSE,TRUE,FALSE);
89bfa8cd 3240 s = force_version(s);
a0d0e21e
LW		 3241 yylval.ival = 0;
3242 OPERATOR(USE);
3243
3244 case KEY_not:
3245 OPERATOR(NOTOP);
3246
79072805 3247 case KEY_open:
93a17b20
LW		 3248 s = skipspace(s);
3249 if (isIDFIRST(*s)) {
3250 char *t;
3251 for (d = s; isALNUM(*d); d++) ;
3252 t = skipspace(d);
3253 if (strchr("|&*+-=!?:.", *t))
3254 warn("Precedence problem: open %.*s should be open(%.*s)",
3255 d-s,s, d-s,s);
3256 }
a0d0e21e 3257 LOP(OP_OPEN,XTERM);
79072805 3258
463ee0b2 3259 case KEY_or:
a0d0e21e 3260 yylval.ival = OP_OR;
463ee0b2
LW		 3261 OPERATOR(OROP);
3262
79072805
LW		 3263 case KEY_ord:
3264 UNI(OP_ORD);
3265
3266 case KEY_oct:
3267 UNI(OP_OCT);
3268
3269 case KEY_opendir:
a0d0e21e 3270 LOP(OP_OPEN_DIR,XTERM);
79072805
LW		 3271
3272 case KEY_print:
3273 checkcomma(s,tokenbuf,"filehandle");
a0d0e21e 3274 LOP(OP_PRINT,XREF);
79072805
LW		 3275
3276 case KEY_printf:
3277 checkcomma(s,tokenbuf,"filehandle");
a0d0e21e 3278 LOP(OP_PRTF,XREF);
79072805 3279
c07a80fd 3280 case KEY_prototype:
3281 UNI(OP_PROTOTYPE);
3282
79072805 3283 case KEY_push:
a0d0e21e 3284 LOP(OP_PUSH,XTERM);
79072805
LW		 3285
3286 case KEY_pop:
3287 UNI(OP_POP);
3288
a0d0e21e
LW		 3289 case KEY_pos:
3290 UNI(OP_POS);
3291
79072805 3292 case KEY_pack:
a0d0e21e 3293 LOP(OP_PACK,XTERM);
79072805
LW		 3294
3295 case KEY_package:
a0d0e21e 3296 s = force_word(s,WORD,FALSE,TRUE,FALSE);
79072805
LW		 3297 OPERATOR(PACKAGE);
3298
3299 case KEY_pipe:
a0d0e21e 3300 LOP(OP_PIPE_OP,XTERM);
79072805
LW		 3301
3302 case KEY_q:
3303 s = scan_str(s);
3304 if (!s)
85e6fe83 3305 missingterm((char*)0);
79072805
LW		 3306 yylval.ival = OP_CONST;
3307 TERM(sublex_start());
3308
a0d0e21e
LW		 3309 case KEY_quotemeta:
3310 UNI(OP_QUOTEMETA);
3311
8990e307
LW		 3312 case KEY_qw:
3313 s = scan_str(s);
3314 if (!s)
85e6fe83 3315 missingterm((char*)0);
55497cff 3316 if (dowarn && SvLEN(lex_stuff)) {
3317 d = SvPV_force(lex_stuff, len);
3318 for (; len; --len, ++d) {
3319 if (*d == ',') {
3320 warn("Possible attempt to separate words with commas");
3321 break;
3322 }
3323 if (*d == '#') {
3324 warn("Possible attempt to put comments in qw() list");
3325 break;
3326 }
3327 }
3328 }
8990e307
LW		 3329 force_next(')');
3330 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3331 lex_stuff = Nullsv;
3332 force_next(THING);
3333 force_next(',');
3334 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3335 force_next(THING);
3336 force_next('(');
a0d0e21e
LW		 3337 yylval.ival = OP_SPLIT;
3338 CLINE;
3339 expect = XTERM;
3340 bufptr = s;
3341 last_lop = oldbufptr;
3342 last_lop_op = OP_SPLIT;
3343 return FUNC;
8990e307 3344
79072805
LW		 3345 case KEY_qq:
3346 s = scan_str(s);
3347 if (!s)
85e6fe83 3348 missingterm((char*)0);
a0d0e21e 3349 yylval.ival = OP_STRINGIFY;
ed6116ce
LW		 3350 if (SvIVX(lex_stuff) == '\'')
3351 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
79072805
LW		 3352 TERM(sublex_start());
3353
3354 case KEY_qx:
3355 s = scan_str(s);
3356 if (!s)
85e6fe83 3357 missingterm((char*)0);
79072805
LW		 3358 yylval.ival = OP_BACKTICK;
3359 set_csh();
3360 TERM(sublex_start());
3361
3362 case KEY_return:
3363 OLDLOP(OP_RETURN);
3364
3365 case KEY_require:
748a9306 3366 *tokenbuf = '\0';
a0d0e21e 3367 s = force_word(s,WORD,TRUE,TRUE,FALSE);
748a9306 3368 if (isIDFIRST(*tokenbuf))
89bfa8cd 3369 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
748a9306 3370 else if (*s == '<')
a0d0e21e 3371 yyerror("<> should be quotes");
463ee0b2 3372 UNI(OP_REQUIRE);
79072805
LW		 3373
3374 case KEY_reset:
3375 UNI(OP_RESET);
3376
3377 case KEY_redo:
a0d0e21e 3378 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW		 3379 LOOPX(OP_REDO);
3380
3381 case KEY_rename:
a0d0e21e 3382 LOP(OP_RENAME,XTERM);
79072805
LW		 3383
3384 case KEY_rand:
3385 UNI(OP_RAND);
3386
3387 case KEY_rmdir:
3388 UNI(OP_RMDIR);
3389
3390 case KEY_rindex:
a0d0e21e 3391 LOP(OP_RINDEX,XTERM);
79072805
LW		 3392
3393 case KEY_read:
a0d0e21e 3394 LOP(OP_READ,XTERM);
79072805
LW		 3395
3396 case KEY_readdir:
3397 UNI(OP_READDIR);
3398
93a17b20
LW		 3399 case KEY_readline:
3400 set_csh();
3401 UNI(OP_READLINE);
3402
3403 case KEY_readpipe:
3404 set_csh();
3405 UNI(OP_BACKTICK);
3406
79072805
LW		 3407 case KEY_rewinddir:
3408 UNI(OP_REWINDDIR);
3409
3410 case KEY_recv:
a0d0e21e 3411 LOP(OP_RECV,XTERM);
79072805
LW		 3412
3413 case KEY_reverse:
a0d0e21e 3414 LOP(OP_REVERSE,XTERM);
79072805
LW		 3415
3416 case KEY_readlink:
3417 UNI(OP_READLINK);
3418
3419 case KEY_ref:
3420 UNI(OP_REF);
3421
3422 case KEY_s:
3423 s = scan_subst(s);
3424 if (yylval.opval)
3425 TERM(sublex_start());
3426 else
3427 TOKEN(1); /* force error */
3428
a0d0e21e
LW		 3429 case KEY_chomp:
3430 UNI(OP_CHOMP);
3431
79072805
LW		 3432 case KEY_scalar:
3433 UNI(OP_SCALAR);
3434
3435 case KEY_select:
a0d0e21e 3436 LOP(OP_SELECT,XTERM);
79072805
LW		 3437
3438 case KEY_seek:
a0d0e21e 3439 LOP(OP_SEEK,XTERM);
79072805
LW		 3440
3441 case KEY_semctl:
a0d0e21e 3442 LOP(OP_SEMCTL,XTERM);
79072805
LW		 3443
3444 case KEY_semget:
a0d0e21e 3445 LOP(OP_SEMGET,XTERM);
79072805
LW		 3446
3447 case KEY_semop:
a0d0e21e 3448 LOP(OP_SEMOP,XTERM);
79072805
LW		 3449
3450 case KEY_send:
a0d0e21e 3451 LOP(OP_SEND,XTERM);
79072805
LW		 3452
3453 case KEY_setpgrp:
a0d0e21e 3454 LOP(OP_SETPGRP,XTERM);
79072805
LW		 3455
3456 case KEY_setpriority:
a0d0e21e 3457 LOP(OP_SETPRIORITY,XTERM);
79072805
LW		 3458
3459 case KEY_sethostent:
ff68c719 3460 UNI(OP_SHOSTENT);
79072805
LW		 3461
3462 case KEY_setnetent:
ff68c719 3463 UNI(OP_SNETENT);
79072805
LW		 3464
3465 case KEY_setservent:
ff68c719 3466 UNI(OP_SSERVENT);
79072805
LW		 3467
3468 case KEY_setprotoent:
ff68c719 3469 UNI(OP_SPROTOENT);
79072805
LW		 3470
3471 case KEY_setpwent:
3472 FUN0(OP_SPWENT);
3473
3474 case KEY_setgrent:
3475 FUN0(OP_SGRENT);
3476
3477 case KEY_seekdir:
a0d0e21e 3478 LOP(OP_SEEKDIR,XTERM);
79072805
LW		 3479
3480 case KEY_setsockopt:
a0d0e21e 3481 LOP(OP_SSOCKOPT,XTERM);
79072805
LW		 3482
3483 case KEY_shift:
3484 UNI(OP_SHIFT);
3485
3486 case KEY_shmctl:
a0d0e21e 3487 LOP(OP_SHMCTL,XTERM);
79072805
LW		 3488
3489 case KEY_shmget:
a0d0e21e 3490 LOP(OP_SHMGET,XTERM);
79072805
LW		 3491
3492 case KEY_shmread:
a0d0e21e 3493 LOP(OP_SHMREAD,XTERM);
79072805
LW		 3494
3495 case KEY_shmwrite:
a0d0e21e 3496 LOP(OP_SHMWRITE,XTERM);
79072805
LW		 3497
3498 case KEY_shutdown:
a0d0e21e 3499 LOP(OP_SHUTDOWN,XTERM);
79072805
LW		 3500
3501 case KEY_sin:
3502 UNI(OP_SIN);
3503
3504 case KEY_sleep:
3505 UNI(OP_SLEEP);
3506
3507 case KEY_socket:
a0d0e21e 3508 LOP(OP_SOCKET,XTERM);
79072805
LW		 3509
3510 case KEY_socketpair:
a0d0e21e 3511 LOP(OP_SOCKPAIR,XTERM);
79072805
LW		 3512
3513 case KEY_sort:
3514 checkcomma(s,tokenbuf,"subroutine name");
3515 s = skipspace(s);
3516 if (*s == ';' || *s == ')') /* probably a close */
463ee0b2
LW		 3517 croak("sort is now a reserved word");
3518 expect = XTERM;
a0d0e21e
LW		 3519 s = force_word(s,WORD,TRUE,TRUE,TRUE);
3520 LOP(OP_SORT,XREF);
79072805
LW		 3521
3522 case KEY_split:
a0d0e21e 3523 LOP(OP_SPLIT,XTERM);
79072805
LW		 3524
3525 case KEY_sprintf:
a0d0e21e 3526 LOP(OP_SPRINTF,XTERM);
79072805
LW		 3527
3528 case KEY_splice:
a0d0e21e 3529 LOP(OP_SPLICE,XTERM);
79072805
LW		 3530
3531 case KEY_sqrt:
3532 UNI(OP_SQRT);
3533
3534 case KEY_srand:
3535 UNI(OP_SRAND);
3536
3537 case KEY_stat:
3538 UNI(OP_STAT);
3539
3540 case KEY_study:
3541 sawstudy++;
3542 UNI(OP_STUDY);
3543
3544 case KEY_substr:
a0d0e21e 3545 LOP(OP_SUBSTR,XTERM);
79072805
LW		 3546
3547 case KEY_format:
3548 case KEY_sub:
93a17b20 3549 really_sub:
79072805 3550 s = skipspace(s);
4633a7c4 3551
463ee0b2 3552 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
8903cb82 3553 char tmpbuf[sizeof tokenbuf];
4633a7c4 3554 expect = XBLOCK;
8903cb82 3555 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
463ee0b2
LW		 3556 if (strchr(tmpbuf, ':'))
3557 sv_setpv(subname, tmpbuf);
3558 else {
3559 sv_setsv(subname,curstname);
8990e307 3560 sv_catpvn(subname,"::",2);
463ee0b2
LW		 3561 sv_catpvn(subname,tmpbuf,len);
3562 }
a0d0e21e 3563 s = force_word(s,WORD,FALSE,TRUE,TRUE);
4633a7c4 3564 s = skipspace(s);
79072805 3565 }
4633a7c4
LW		 3566 else {
3567 expect = XTERMBLOCK;
79072805 3568 sv_setpv(subname,"?");
4633a7c4
LW		 3569 }
3570
3571 if (tmp == KEY_format) {
3572 s = skipspace(s);
3573 if (*s == '=')
3574 lex_formbrack = lex_brackets + 1;
3575 OPERATOR(FORMAT);
3576 }
79072805 3577
4633a7c4
LW		 3578 /* Look for a prototype */
3579 if (*s == '(') {
68dc0745 3580 char *p;
3581
4633a7c4
LW		 3582 s = scan_str(s);
3583 if (!s) {
3584 if (lex_stuff)
3585 SvREFCNT_dec(lex_stuff);
3586 lex_stuff = Nullsv;
3587 croak("Prototype not terminated");
3588 }
68dc0745 3589 /* strip spaces */
3590 d = SvPVX(lex_stuff);
3591 tmp = 0;
3592 for (p = d; *p; ++p) {
3593 if (!isSPACE(*p))
3594 d[tmp++] = *p;
3595 }
3596 d[tmp] = '\0';
3597 SvCUR(lex_stuff) = tmp;
3598
4633a7c4
LW		 3599 nexttoke++;
3600 nextval[1] = nextval[0];
3601 nexttype[1] = nexttype[0];
3602 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3603 nexttype[0] = THING;
3604 if (nexttoke == 1) {
3605 lex_defer = lex_state;
3606 lex_expect = expect;
3607 lex_state = LEX_KNOWNEXT;
3608 }
3609 lex_stuff = Nullsv;
3610 }
79072805 3611
4633a7c4
LW		 3612 if (*SvPV(subname,na) == '?') {
3613 sv_setpv(subname,"__ANON__");
3614 TOKEN(ANONSUB);
3615 }
3616 PREBLOCK(SUB);
79072805
LW		 3617
3618 case KEY_system:
3619 set_csh();
a0d0e21e 3620 LOP(OP_SYSTEM,XREF);
79072805
LW		 3621
3622 case KEY_symlink:
a0d0e21e 3623 LOP(OP_SYMLINK,XTERM);
79072805
LW		 3624
3625 case KEY_syscall:
a0d0e21e 3626 LOP(OP_SYSCALL,XTERM);
79072805 3627
c07a80fd 3628 case KEY_sysopen:
3629 LOP(OP_SYSOPEN,XTERM);
3630
137443ea 3631 case KEY_sysseek:
3632 LOP(OP_SYSSEEK,XTERM);
3633
79072805 3634 case KEY_sysread:
a0d0e21e 3635 LOP(OP_SYSREAD,XTERM);
79072805
LW		 3636
3637 case KEY_syswrite:
a0d0e21e 3638 LOP(OP_SYSWRITE,XTERM);
79072805
LW		 3639
3640 case KEY_tr:
3641 s = scan_trans(s);
3642 TERM(sublex_start());
3643
3644 case KEY_tell:
3645 UNI(OP_TELL);
3646
3647 case KEY_telldir:
3648 UNI(OP_TELLDIR);
3649
463ee0b2 3650 case KEY_tie:
a0d0e21e 3651 LOP(OP_TIE,XTERM);
463ee0b2 3652
c07a80fd 3653 case KEY_tied:
3654 UNI(OP_TIED);
3655
79072805
LW		 3656 case KEY_time:
3657 FUN0(OP_TIME);
3658
3659 case KEY_times:
3660 FUN0(OP_TMS);
3661
3662 case KEY_truncate:
a0d0e21e 3663 LOP(OP_TRUNCATE,XTERM);
79072805
LW		 3664
3665 case KEY_uc:
3666 UNI(OP_UC);
3667
3668 case KEY_ucfirst:
3669 UNI(OP_UCFIRST);
3670
463ee0b2
LW		 3671 case KEY_untie:
3672 UNI(OP_UNTIE);
3673
79072805
LW		 3674 case KEY_until:
3675 yylval.ival = curcop->cop_line;
3676 OPERATOR(UNTIL);
3677
3678 case KEY_unless:
3679 yylval.ival = curcop->cop_line;
3680 OPERATOR(UNLESS);
3681
3682 case KEY_unlink:
a0d0e21e 3683 LOP(OP_UNLINK,XTERM);
79072805
LW		 3684
3685 case KEY_undef:
3686 UNI(OP_UNDEF);
3687
3688 case KEY_unpack:
a0d0e21e 3689 LOP(OP_UNPACK,XTERM);
79072805
LW		 3690
3691 case KEY_utime:
a0d0e21e 3692 LOP(OP_UTIME,XTERM);
79072805
LW		 3693
3694 case KEY_umask:
748a9306
LW		 3695 if (dowarn) {
3696 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3697 if (*d != '0' && isDIGIT(*d))
3698 yywarn("umask: argument is missing initial 0");
3699 }
79072805
LW		 3700 UNI(OP_UMASK);
3701
3702 case KEY_unshift:
a0d0e21e
LW		 3703 LOP(OP_UNSHIFT,XTERM);
3704
3705 case KEY_use:
3706 if (expect != XSTATE)
3707 yyerror("\"use\" not allowed in expression");
89bfa8cd 3708 s = skipspace(s);
3709 if(isDIGIT(*s)) {
3710 s = force_version(s);
3711 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3712 nextval[nexttoke].opval = Nullop;
3713 force_next(WORD);
3714 }
3715 }
3716 else {
3717 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3718 s = force_version(s);
3719 }
a0d0e21e
LW		 3720 yylval.ival = 1;
3721 OPERATOR(USE);
79072805
LW		 3722
3723 case KEY_values:
3724 UNI(OP_VALUES);
3725
3726 case KEY_vec:
3727 sawvec = TRUE;
a0d0e21e 3728 LOP(OP_VEC,XTERM);
79072805
LW		 3729
3730 case KEY_while:
3731 yylval.ival = curcop->cop_line;
3732 OPERATOR(WHILE);
3733
3734 case KEY_warn:
a0d0e21e
LW		 3735 hints |= HINT_BLOCK_SCOPE;
3736 LOP(OP_WARN,XTERM);
79072805
LW		 3737
3738 case KEY_wait:
3739 FUN0(OP_WAIT);
3740
3741 case KEY_waitpid:
a0d0e21e 3742 LOP(OP_WAITPID,XTERM);
79072805
LW		 3743
3744 case KEY_wantarray:
3745 FUN0(OP_WANTARRAY);
3746
3747 case KEY_write:
85e6fe83 3748 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
79072805
LW		 3749 UNI(OP_ENTERWRITE);
3750
3751 case KEY_x:
3752 if (expect == XOPERATOR)
3753 Mop(OP_REPEAT);
3754 check_uni();
3755 goto just_a_word;
3756
a0d0e21e
LW		 3757 case KEY_xor:
3758 yylval.ival = OP_XOR;
3759 OPERATOR(OROP);
3760
79072805
LW		 3761 case KEY_y:
3762 s = scan_trans(s);
3763 TERM(sublex_start());
3764 }
49dc05e3 3765 }}
79072805
LW		 3766}
3767
3768I32
8ac85365 3769keyword(register char *d, I32 len)
79072805
LW		 3770{
3771 switch (*d) {
3772 case '_':
3773 if (d[1] == '_') {
a0d0e21e 3774 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
68dc0745 3775 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3776 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
e50aee73 3777 if (strEQ(d,"__DATA__")) return KEY___DATA__;
79072805
LW		 3778 if (strEQ(d,"__END__")) return KEY___END__;
3779 }
3780 break;
8990e307
LW		 3781 case 'A':
3782 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3783 break;
79072805 3784 case 'a':
463ee0b2
LW		 3785 switch (len) {
3786 case 3:
a0d0e21e
LW		 3787 if (strEQ(d,"and")) return -KEY_and;
3788 if (strEQ(d,"abs")) return -KEY_abs;
85e6fe83 3789 break;
463ee0b2 3790 case 5:
a0d0e21e
LW		 3791 if (strEQ(d,"alarm")) return -KEY_alarm;
3792 if (strEQ(d,"atan2")) return -KEY_atan2;
463ee0b2
LW		 3793 break;
3794 case 6:
a0d0e21e 3795 if (strEQ(d,"accept")) return -KEY_accept;
463ee0b2
LW		 3796 break;
3797 }
79072805
LW		 3798 break;
3799 case 'B':
3800 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
93a17b20 3801 break;
79072805 3802 case 'b':
a0d0e21e
LW		 3803 if (strEQ(d,"bless")) return -KEY_bless;
3804 if (strEQ(d,"bind")) return -KEY_bind;
3805 if (strEQ(d,"binmode")) return -KEY_binmode;
3806 break;
3807 case 'C':
3808 if (strEQ(d,"CORE")) return -KEY_CORE;
79072805
LW		 3809 break;
3810 case 'c':
3811 switch (len) {
3812 case 3:
a0d0e21e
LW		 3813 if (strEQ(d,"cmp")) return -KEY_cmp;
3814 if (strEQ(d,"chr")) return -KEY_chr;
3815 if (strEQ(d,"cos")) return -KEY_cos;
79072805
LW		 3816 break;
3817 case 4:
3818 if (strEQ(d,"chop")) return KEY_chop;
3819 break;
3820 case 5:
a0d0e21e
LW		 3821 if (strEQ(d,"close")) return -KEY_close;
3822 if (strEQ(d,"chdir")) return -KEY_chdir;
3823 if (strEQ(d,"chomp")) return KEY_chomp;
3824 if (strEQ(d,"chmod")) return -KEY_chmod;
3825 if (strEQ(d,"chown")) return -KEY_chown;
3826 if (strEQ(d,"crypt")) return -KEY_crypt;
79072805
LW		 3827 break;
3828 case 6:
a0d0e21e
LW		 3829 if (strEQ(d,"chroot")) return -KEY_chroot;
3830 if (strEQ(d,"caller")) return -KEY_caller;
79072805
LW		 3831 break;
3832 case 7:
a0d0e21e 3833 if (strEQ(d,"connect")) return -KEY_connect;
79072805
LW		 3834 break;
3835 case 8:
a0d0e21e
LW		 3836 if (strEQ(d,"closedir")) return -KEY_closedir;
3837 if (strEQ(d,"continue")) return -KEY_continue;
79072805
LW		 3838 break;
3839 }
3840 break;
ed6116ce
LW		 3841 case 'D':
3842 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3843 break;
79072805
LW		 3844 case 'd':
3845