3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "It all comes from here, the stench and the peril." --Frodo
16 * This file is the lexer for Perl. It's closely linked to the
19 * The main routine is yylex(), which returns the next token.
23 #define PERL_IN_TOKE_C
26 #define yylval (PL_parser->yylval)
28 /* YYINITDEPTH -- initial size of the parser's stacks. */
29 #define YYINITDEPTH 200
31 /* XXX temporary backwards compatibility */
32 #define PL_lex_brackets (PL_parser->lex_brackets)
33 #define PL_lex_brackstack (PL_parser->lex_brackstack)
34 #define PL_lex_casemods (PL_parser->lex_casemods)
35 #define PL_lex_casestack (PL_parser->lex_casestack)
36 #define PL_lex_defer (PL_parser->lex_defer)
37 #define PL_lex_dojoin (PL_parser->lex_dojoin)
38 #define PL_lex_expect (PL_parser->lex_expect)
39 #define PL_lex_formbrack (PL_parser->lex_formbrack)
40 #define PL_lex_inpat (PL_parser->lex_inpat)
41 #define PL_lex_inwhat (PL_parser->lex_inwhat)
42 #define PL_lex_op (PL_parser->lex_op)
43 #define PL_lex_repl (PL_parser->lex_repl)
44 #define PL_lex_starts (PL_parser->lex_starts)
45 #define PL_lex_stuff (PL_parser->lex_stuff)
46 #define PL_multi_start (PL_parser->multi_start)
47 #define PL_multi_open (PL_parser->multi_open)
48 #define PL_multi_close (PL_parser->multi_close)
49 #define PL_pending_ident (PL_parser->pending_ident)
50 #define PL_preambled (PL_parser->preambled)
51 #define PL_sublex_info (PL_parser->sublex_info)
52 #define PL_linestr (PL_parser->linestr)
53 #define PL_expect (PL_parser->expect)
54 #define PL_copline (PL_parser->copline)
55 #define PL_bufptr (PL_parser->bufptr)
56 #define PL_oldbufptr (PL_parser->oldbufptr)
57 #define PL_oldoldbufptr (PL_parser->oldoldbufptr)
58 #define PL_linestart (PL_parser->linestart)
59 #define PL_bufend (PL_parser->bufend)
60 #define PL_last_uni (PL_parser->last_uni)
61 #define PL_last_lop (PL_parser->last_lop)
62 #define PL_last_lop_op (PL_parser->last_lop_op)
63 #define PL_lex_state (PL_parser->lex_state)
64 #define PL_rsfp (PL_parser->rsfp)
65 #define PL_rsfp_filters (PL_parser->rsfp_filters)
66 #define PL_in_my (PL_parser->in_my)
67 #define PL_in_my_stash (PL_parser->in_my_stash)
68 #define PL_tokenbuf (PL_parser->tokenbuf)
69 #define PL_multi_end (PL_parser->multi_end)
70 #define PL_error_count (PL_parser->error_count)
73 # define PL_endwhite (PL_parser->endwhite)
74 # define PL_faketokens (PL_parser->faketokens)
75 # define PL_lasttoke (PL_parser->lasttoke)
76 # define PL_nextwhite (PL_parser->nextwhite)
77 # define PL_realtokenstart (PL_parser->realtokenstart)
78 # define PL_skipwhite (PL_parser->skipwhite)
79 # define PL_thisclose (PL_parser->thisclose)
80 # define PL_thismad (PL_parser->thismad)
81 # define PL_thisopen (PL_parser->thisopen)
82 # define PL_thisstuff (PL_parser->thisstuff)
83 # define PL_thistoken (PL_parser->thistoken)
84 # define PL_thiswhite (PL_parser->thiswhite)
85 # define PL_thiswhite (PL_parser->thiswhite)
86 # define PL_nexttoke (PL_parser->nexttoke)
87 # define PL_curforce (PL_parser->curforce)
89 # define PL_nexttoke (PL_parser->nexttoke)
90 # define PL_nexttype (PL_parser->nexttype)
91 # define PL_nextval (PL_parser->nextval)
95 S_pending_ident(pTHX);
97 static const char ident_too_long[] = "Identifier too long";
98 static const char commaless_variable_list[] = "comma-less variable list";
100 #ifndef PERL_NO_UTF16_FILTER
101 static I32 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen);
102 static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen);
106 # define CURMAD(slot,sv) if (PL_madskills) { curmad(slot,sv); sv = 0; }
107 # define NEXTVAL_NEXTTOKE PL_nexttoke[PL_curforce].next_val
109 # define CURMAD(slot,sv)
110 # define NEXTVAL_NEXTTOKE PL_nextval[PL_nexttoke]
113 #define XFAKEBRACK 128
114 #define XENUMMASK 127
116 #ifdef USE_UTF8_SCRIPTS
117 # define UTF (!IN_BYTES)
119 # define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
122 /* In variables named $^X, these are the legal values for X.
123 * 1999-02-27 mjd-perl-patch@plover.com */
124 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
126 /* On MacOS, respect nonbreaking spaces */
127 #ifdef MACOS_TRADITIONAL
128 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
130 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
133 /* LEX_* are values for PL_lex_state, the state of the lexer.
134 * They are arranged oddly so that the guard on the switch statement
135 * can get by with a single comparison (if the compiler is smart enough).
138 /* #define LEX_NOTPARSING 11 is done in perl.h. */
140 #define LEX_NORMAL 10 /* normal code (ie not within "...") */
141 #define LEX_INTERPNORMAL 9 /* code within a string, eg "$foo[$x+1]" */
142 #define LEX_INTERPCASEMOD 8 /* expecting a \U, \Q or \E etc */
143 #define LEX_INTERPPUSH 7 /* starting a new sublex parse level */
144 #define LEX_INTERPSTART 6 /* expecting the start of a $var */
146 /* at end of code, eg "$x" followed by: */
147 #define LEX_INTERPEND 5 /* ... eg not one of [, { or -> */
148 #define LEX_INTERPENDMAYBE 4 /* ... eg one of [, { or -> */
150 #define LEX_INTERPCONCAT 3 /* expecting anything, eg at start of
151 string or after \E, $foo, etc */
152 #define LEX_INTERPCONST 2 /* NOT USED */
153 #define LEX_FORMLINE 1 /* expecting a format line */
154 #define LEX_KNOWNEXT 0 /* next token known; just return it */
158 static const char* const lex_state_names[] = {
177 #include "keywords.h"
179 /* CLINE is a macro that ensures PL_copline has a sane value */
184 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
187 # define SKIPSPACE0(s) skipspace0(s)
188 # define SKIPSPACE1(s) skipspace1(s)
189 # define SKIPSPACE2(s,tsv) skipspace2(s,&tsv)
190 # define PEEKSPACE(s) skipspace2(s,0)
192 # define SKIPSPACE0(s) skipspace(s)
193 # define SKIPSPACE1(s) skipspace(s)
194 # define SKIPSPACE2(s,tsv) skipspace(s)
195 # define PEEKSPACE(s) skipspace(s)
199 * Convenience functions to return different tokens and prime the
200 * lexer for the next token. They all take an argument.
202 * TOKEN : generic token (used for '(', DOLSHARP, etc)
203 * OPERATOR : generic operator
204 * AOPERATOR : assignment operator
205 * PREBLOCK : beginning the block after an if, while, foreach, ...
206 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
207 * PREREF : *EXPR where EXPR is not a simple identifier
208 * TERM : expression term
209 * LOOPX : loop exiting command (goto, last, dump, etc)
210 * FTST : file test operator
211 * FUN0 : zero-argument function
212 * FUN1 : not used, except for not, which isn't a UNIOP
213 * BOop : bitwise or or xor
215 * SHop : shift operator
216 * PWop : power operator
217 * PMop : pattern-matching operator
218 * Aop : addition-level operator
219 * Mop : multiplication-level operator
220 * Eop : equality-testing operator
221 * Rop : relational operator <= != gt
223 * Also see LOP and lop() below.
226 #ifdef DEBUGGING /* Serve -DT. */
227 # define REPORT(retval) tokereport((I32)retval)
229 # define REPORT(retval) (retval)
232 #define TOKEN(retval) return ( PL_bufptr = s, REPORT(retval))
233 #define OPERATOR(retval) return (PL_expect = XTERM, PL_bufptr = s, REPORT(retval))
234 #define AOPERATOR(retval) return ao((PL_expect = XTERM, PL_bufptr = s, REPORT(retval)))
235 #define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s, REPORT(retval))
236 #define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s, REPORT(retval))
237 #define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s, REPORT(retval))
238 #define TERM(retval) return (CLINE, PL_expect = XOPERATOR, PL_bufptr = s, REPORT(retval))
239 #define LOOPX(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)LOOPEX))
240 #define FTST(f) return (yylval.ival=f, PL_expect=XTERMORDORDOR, PL_bufptr=s, REPORT((int)UNIOP))
241 #define FUN0(f) return (yylval.ival=f, PL_expect=XOPERATOR, PL_bufptr=s, REPORT((int)FUNC0))
242 #define FUN1(f) return (yylval.ival=f, PL_expect=XOPERATOR, PL_bufptr=s, REPORT((int)FUNC1))
243 #define BOop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)BITOROP)))
244 #define BAop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)BITANDOP)))
245 #define SHop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)SHIFTOP)))
246 #define PWop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)POWOP)))
247 #define PMop(f) return(yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)MATCHOP))
248 #define Aop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)ADDOP)))
249 #define Mop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)MULOP)))
250 #define Eop(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)EQOP))
251 #define Rop(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)RELOP))
253 /* This bit of chicanery makes a unary function followed by
254 * a parenthesis into a function with one argument, highest precedence.
255 * The UNIDOR macro is for unary functions that can be followed by the //
256 * operator (such as C<shift // 0>).
258 #define UNI2(f,x) { \
262 PL_last_uni = PL_oldbufptr; \
263 PL_last_lop_op = f; \
265 return REPORT( (int)FUNC1 ); \
267 return REPORT( *s=='(' ? (int)FUNC1 : (int)UNIOP ); \
269 #define UNI(f) UNI2(f,XTERM)
270 #define UNIDOR(f) UNI2(f,XTERMORDORDOR)
272 #define UNIBRACK(f) { \
275 PL_last_uni = PL_oldbufptr; \
277 return REPORT( (int)FUNC1 ); \
279 return REPORT( (*s == '(') ? (int)FUNC1 : (int)UNIOP ); \
282 /* grandfather return to old style */
283 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
287 /* how to interpret the yylval associated with the token */
291 TOKENTYPE_OPNUM, /* yylval.ival contains an opcode number */
297 static struct debug_tokens {
299 enum token_type type;
301 } const debug_tokens[] =
303 { ADDOP, TOKENTYPE_OPNUM, "ADDOP" },
304 { ANDAND, TOKENTYPE_NONE, "ANDAND" },
305 { ANDOP, TOKENTYPE_NONE, "ANDOP" },
306 { ANONSUB, TOKENTYPE_IVAL, "ANONSUB" },
307 { ARROW, TOKENTYPE_NONE, "ARROW" },
308 { ASSIGNOP, TOKENTYPE_OPNUM, "ASSIGNOP" },
309 { BITANDOP, TOKENTYPE_OPNUM, "BITANDOP" },
310 { BITOROP, TOKENTYPE_OPNUM, "BITOROP" },
311 { COLONATTR, TOKENTYPE_NONE, "COLONATTR" },
312 { CONTINUE, TOKENTYPE_NONE, "CONTINUE" },
313 { DEFAULT, TOKENTYPE_NONE, "DEFAULT" },
314 { DO, TOKENTYPE_NONE, "DO" },
315 { DOLSHARP, TOKENTYPE_NONE, "DOLSHARP" },
316 { DORDOR, TOKENTYPE_NONE, "DORDOR" },
317 { DOROP, TOKENTYPE_OPNUM, "DOROP" },
318 { DOTDOT, TOKENTYPE_IVAL, "DOTDOT" },
319 { ELSE, TOKENTYPE_NONE, "ELSE" },
320 { ELSIF, TOKENTYPE_IVAL, "ELSIF" },
321 { EQOP, TOKENTYPE_OPNUM, "EQOP" },
322 { FOR, TOKENTYPE_IVAL, "FOR" },
323 { FORMAT, TOKENTYPE_NONE, "FORMAT" },
324 { FUNC, TOKENTYPE_OPNUM, "FUNC" },
325 { FUNC0, TOKENTYPE_OPNUM, "FUNC0" },
326 { FUNC0SUB, TOKENTYPE_OPVAL, "FUNC0SUB" },
327 { FUNC1, TOKENTYPE_OPNUM, "FUNC1" },
328 { FUNCMETH, TOKENTYPE_OPVAL, "FUNCMETH" },
329 { GIVEN, TOKENTYPE_IVAL, "GIVEN" },
330 { HASHBRACK, TOKENTYPE_NONE, "HASHBRACK" },
331 { IF, TOKENTYPE_IVAL, "IF" },
332 { LABEL, TOKENTYPE_PVAL, "LABEL" },
333 { LOCAL, TOKENTYPE_IVAL, "LOCAL" },
334 { LOOPEX, TOKENTYPE_OPNUM, "LOOPEX" },
335 { LSTOP, TOKENTYPE_OPNUM, "LSTOP" },
336 { LSTOPSUB, TOKENTYPE_OPVAL, "LSTOPSUB" },
337 { MATCHOP, TOKENTYPE_OPNUM, "MATCHOP" },
338 { METHOD, TOKENTYPE_OPVAL, "METHOD" },
339 { MULOP, TOKENTYPE_OPNUM, "MULOP" },
340 { MY, TOKENTYPE_IVAL, "MY" },
341 { MYSUB, TOKENTYPE_NONE, "MYSUB" },
342 { NOAMP, TOKENTYPE_NONE, "NOAMP" },
343 { NOTOP, TOKENTYPE_NONE, "NOTOP" },
344 { OROP, TOKENTYPE_IVAL, "OROP" },
345 { OROR, TOKENTYPE_NONE, "OROR" },
346 { PACKAGE, TOKENTYPE_NONE, "PACKAGE" },
347 { PMFUNC, TOKENTYPE_OPVAL, "PMFUNC" },
348 { POSTDEC, TOKENTYPE_NONE, "POSTDEC" },
349 { POSTINC, TOKENTYPE_NONE, "POSTINC" },
350 { POWOP, TOKENTYPE_OPNUM, "POWOP" },
351 { PREDEC, TOKENTYPE_NONE, "PREDEC" },
352 { PREINC, TOKENTYPE_NONE, "PREINC" },
353 { PRIVATEREF, TOKENTYPE_OPVAL, "PRIVATEREF" },
354 { REFGEN, TOKENTYPE_NONE, "REFGEN" },
355 { RELOP, TOKENTYPE_OPNUM, "RELOP" },
356 { SHIFTOP, TOKENTYPE_OPNUM, "SHIFTOP" },
357 { SUB, TOKENTYPE_NONE, "SUB" },
358 { THING, TOKENTYPE_OPVAL, "THING" },
359 { UMINUS, TOKENTYPE_NONE, "UMINUS" },
360 { UNIOP, TOKENTYPE_OPNUM, "UNIOP" },
361 { UNIOPSUB, TOKENTYPE_OPVAL, "UNIOPSUB" },
362 { UNLESS, TOKENTYPE_IVAL, "UNLESS" },
363 { UNTIL, TOKENTYPE_IVAL, "UNTIL" },
364 { USE, TOKENTYPE_IVAL, "USE" },
365 { WHEN, TOKENTYPE_IVAL, "WHEN" },
366 { WHILE, TOKENTYPE_IVAL, "WHILE" },
367 { WORD, TOKENTYPE_OPVAL, "WORD" },
368 { 0, TOKENTYPE_NONE, NULL }
371 /* dump the returned token in rv, plus any optional arg in yylval */
374 S_tokereport(pTHX_ I32 rv)
378 const char *name = NULL;
379 enum token_type type = TOKENTYPE_NONE;
380 const struct debug_tokens *p;
381 SV* const report = newSVpvs("<== ");
383 for (p = debug_tokens; p->token; p++) {
384 if (p->token == (int)rv) {
391 Perl_sv_catpv(aTHX_ report, name);
392 else if ((char)rv > ' ' && (char)rv < '~')
393 Perl_sv_catpvf(aTHX_ report, "'%c'", (char)rv);
395 sv_catpvs(report, "EOF");
397 Perl_sv_catpvf(aTHX_ report, "?? %"IVdf, (IV)rv);
400 case TOKENTYPE_GVVAL: /* doesn't appear to be used */
403 Perl_sv_catpvf(aTHX_ report, "(ival=%"IVdf")", (IV)yylval.ival);
405 case TOKENTYPE_OPNUM:
406 Perl_sv_catpvf(aTHX_ report, "(ival=op_%s)",
407 PL_op_name[yylval.ival]);
410 Perl_sv_catpvf(aTHX_ report, "(pval=\"%s\")", yylval.pval);
412 case TOKENTYPE_OPVAL:
414 Perl_sv_catpvf(aTHX_ report, "(opval=op_%s)",
415 PL_op_name[yylval.opval->op_type]);
416 if (yylval.opval->op_type == OP_CONST) {
417 Perl_sv_catpvf(aTHX_ report, " %s",
418 SvPEEK(cSVOPx_sv(yylval.opval)));
423 sv_catpvs(report, "(opval=null)");
426 PerlIO_printf(Perl_debug_log, "### %s\n\n", SvPV_nolen_const(report));
432 /* print the buffer with suitable escapes */
435 S_printbuf(pTHX_ const char* fmt, const char* s)
437 SV* const tmp = newSVpvs("");
438 PerlIO_printf(Perl_debug_log, fmt, pv_display(tmp, s, strlen(s), 0, 60));
447 * This subroutine detects &&=, ||=, and //= and turns an ANDAND, OROR or DORDOR
448 * into an OP_ANDASSIGN, OP_ORASSIGN, or OP_DORASSIGN
452 S_ao(pTHX_ int toketype)
455 if (*PL_bufptr == '=') {
457 if (toketype == ANDAND)
458 yylval.ival = OP_ANDASSIGN;
459 else if (toketype == OROR)
460 yylval.ival = OP_ORASSIGN;
461 else if (toketype == DORDOR)
462 yylval.ival = OP_DORASSIGN;
470 * When Perl expects an operator and finds something else, no_op
471 * prints the warning. It always prints "<something> found where
472 * operator expected. It prints "Missing semicolon on previous line?"
473 * if the surprise occurs at the start of the line. "do you need to
474 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
475 * where the compiler doesn't know if foo is a method call or a function.
476 * It prints "Missing operator before end of line" if there's nothing
477 * after the missing operator, or "... before <...>" if there is something
478 * after the missing operator.
482 S_no_op(pTHX_ const char *what, char *s)
485 char * const oldbp = PL_bufptr;
486 const bool is_first = (PL_oldbufptr == PL_linestart);
492 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
493 if (ckWARN_d(WARN_SYNTAX)) {
495 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
496 "\t(Missing semicolon on previous line?)\n");
497 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
499 for (t = PL_oldoldbufptr; (isALNUM_lazy_if(t,UTF) || *t == ':'); t++)
501 if (t < PL_bufptr && isSPACE(*t))
502 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
503 "\t(Do you need to predeclare %.*s?)\n",
504 (int)(t - PL_oldoldbufptr), PL_oldoldbufptr);
508 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
509 "\t(Missing operator before %.*s?)\n", (int)(s - oldbp), oldbp);
517 * Complain about missing quote/regexp/heredoc terminator.
518 * If it's called with NULL then it cauterizes the line buffer.
519 * If we're in a delimited string and the delimiter is a control
520 * character, it's reformatted into a two-char sequence like ^C.
525 S_missingterm(pTHX_ char *s)
531 char * const nl = strrchr(s,'\n');
537 iscntrl(PL_multi_close)
539 PL_multi_close < 32 || PL_multi_close == 127
543 tmpbuf[1] = (char)toCTRL(PL_multi_close);
548 *tmpbuf = (char)PL_multi_close;
552 q = strchr(s,'"') ? '\'' : '"';
553 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
556 #define FEATURE_IS_ENABLED(name) \
557 ((0 != (PL_hints & HINT_LOCALIZE_HH)) \
558 && S_feature_is_enabled(aTHX_ STR_WITH_LEN(name)))
560 * S_feature_is_enabled
561 * Check whether the named feature is enabled.
564 S_feature_is_enabled(pTHX_ const char *name, STRLEN namelen)
567 HV * const hinthv = GvHV(PL_hintgv);
568 char he_name[32] = "feature_";
569 (void) my_strlcpy(&he_name[8], name, 24);
571 return (hinthv && hv_exists(hinthv, he_name, 8 + namelen));
579 Perl_deprecate(pTHX_ const char *s)
581 if (ckWARN(WARN_DEPRECATED))
582 Perl_warner(aTHX_ packWARN(WARN_DEPRECATED), "Use of %s is deprecated", s);
586 Perl_deprecate_old(pTHX_ const char *s)
588 /* This function should NOT be called for any new deprecated warnings */
589 /* Use Perl_deprecate instead */
591 /* It is here to maintain backward compatibility with the pre-5.8 */
592 /* warnings category hierarchy. The "deprecated" category used to */
593 /* live under the "syntax" category. It is now a top-level category */
594 /* in its own right. */
596 if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
597 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
598 "Use of %s is deprecated", s);
602 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
603 * utf16-to-utf8-reversed.
606 #ifdef PERL_CR_FILTER
610 register const char *s = SvPVX_const(sv);
611 register const char * const e = s + SvCUR(sv);
612 /* outer loop optimized to do nothing if there are no CR-LFs */
614 if (*s++ == '\r' && *s == '\n') {
615 /* hit a CR-LF, need to copy the rest */
616 register char *d = s - 1;
619 if (*s == '\r' && s[1] == '\n')
630 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
632 const I32 count = FILTER_READ(idx+1, sv, maxlen);
633 if (count > 0 && !maxlen)
644 * Create a parser object and initialise its parser and lexer fields
646 * rsfp is the opened file handle to read from (if any),
648 * line holds any initial content already read from the file (or in
649 * the case of no file, such as an eval, the whole contents);
651 * new_filter indicates that this is a new file and it shouldn't inherit
652 * the filters from the current parser (ie require).
656 Perl_lex_start(pTHX_ SV *line, PerlIO *rsfp, bool new_filter)
659 const char *s = NULL;
661 yy_parser *parser, *oparser;
663 /* create and initialise a parser */
665 Newxz(parser, 1, yy_parser);
666 parser->old_parser = oparser = PL_parser;
669 Newx(parser->stack, YYINITDEPTH, yy_stack_frame);
670 parser->ps = parser->stack;
671 parser->stack_size = YYINITDEPTH;
673 parser->stack->state = 0;
674 parser->yyerrstatus = 0;
675 parser->yychar = YYEMPTY; /* Cause a token to be read. */
677 /* on scope exit, free this parser and restore any outer one */
679 parser->saved_curcop = PL_curcop;
681 /* initialise lexer state */
684 parser->curforce = -1;
686 parser->nexttoke = 0;
688 parser->copline = NOLINE;
689 parser->lex_state = LEX_NORMAL;
690 parser->expect = XSTATE;
692 parser->rsfp_filters = (new_filter || !oparser) ? newAV()
693 : (AV*)SvREFCNT_inc(oparser->rsfp_filters);
695 Newx(parser->lex_brackstack, 120, char);
696 Newx(parser->lex_casestack, 12, char);
697 *parser->lex_casestack = '\0';
700 s = SvPV_const(line, len);
706 parser->linestr = newSVpvs("\n;");
707 } else if (SvREADONLY(line) || s[len-1] != ';') {
708 parser->linestr = newSVsv(line);
710 sv_catpvs(parser->linestr, "\n;");
713 SvREFCNT_inc_simple_void_NN(line);
714 parser->linestr = line;
716 parser->oldoldbufptr =
719 parser->linestart = SvPVX(parser->linestr);
720 parser->bufend = parser->bufptr + SvCUR(parser->linestr);
721 parser->last_lop = parser->last_uni = NULL;
725 /* delete a parser object */
728 Perl_parser_free(pTHX_ const yy_parser *parser)
730 PL_curcop = parser->saved_curcop;
731 SvREFCNT_dec(parser->linestr);
733 if (parser->rsfp == PerlIO_stdin())
734 PerlIO_clearerr(parser->rsfp);
735 else if (parser->rsfp && parser->old_parser
736 && parser->rsfp != parser->old_parser->rsfp)
737 PerlIO_close(parser->rsfp);
738 SvREFCNT_dec(parser->rsfp_filters);
740 Safefree(parser->stack);
741 Safefree(parser->lex_brackstack);
742 Safefree(parser->lex_casestack);
743 PL_parser = parser->old_parser;
750 * Finalizer for lexing operations. Must be called when the parser is
751 * done with the lexer.
758 PL_doextract = FALSE;
763 * This subroutine has nothing to do with tilting, whether at windmills
764 * or pinball tables. Its name is short for "increment line". It
765 * increments the current line number in CopLINE(PL_curcop) and checks
766 * to see whether the line starts with a comment of the form
767 * # line 500 "foo.pm"
768 * If so, it sets the current line number and file to the values in the comment.
772 S_incline(pTHX_ const char *s)
779 CopLINE_inc(PL_curcop);
782 while (SPACE_OR_TAB(*s))
784 if (strnEQ(s, "line", 4))
788 if (SPACE_OR_TAB(*s))
792 while (SPACE_OR_TAB(*s))
800 while (SPACE_OR_TAB(*s))
802 if (*s == '"' && (t = strchr(s+1, '"'))) {
812 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
814 if (*e != '\n' && *e != '\0')
815 return; /* false alarm */
818 const STRLEN len = t - s;
820 const char * const cf = CopFILE(PL_curcop);
821 STRLEN tmplen = cf ? strlen(cf) : 0;
822 if (tmplen > 7 && strnEQ(cf, "(eval ", 6)) {
823 /* must copy *{"::_<(eval N)[oldfilename:L]"}
824 * to *{"::_<newfilename"} */
825 /* However, the long form of evals is only turned on by the
826 debugger - usually they're "(eval %lu)" */
830 STRLEN tmplen2 = len;
831 if (tmplen + 2 <= sizeof smallbuf)
834 Newx(tmpbuf, tmplen + 2, char);
837 memcpy(tmpbuf + 2, cf, tmplen);
839 gvp = (GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, FALSE);
844 if (tmplen2 + 2 <= sizeof smallbuf)
847 Newx(tmpbuf2, tmplen2 + 2, char);
849 if (tmpbuf2 != smallbuf || tmpbuf != smallbuf) {
850 /* Either they malloc'd it, or we malloc'd it,
851 so no prefix is present in ours. */
856 memcpy(tmpbuf2 + 2, s, tmplen2);
859 gv2 = *(GV**)hv_fetch(PL_defstash, tmpbuf2, tmplen2, TRUE);
861 gv_init(gv2, PL_defstash, tmpbuf2, tmplen2, FALSE);
862 /* adjust ${"::_<newfilename"} to store the new file name */
863 GvSV(gv2) = newSVpvn(tmpbuf2 + 2, tmplen2 - 2);
864 GvHV(gv2) = (HV*)SvREFCNT_inc(GvHV(*gvp));
865 GvAV(gv2) = (AV*)SvREFCNT_inc(GvAV(*gvp));
868 if (tmpbuf2 != smallbuf) Safefree(tmpbuf2);
870 if (tmpbuf != smallbuf) Safefree(tmpbuf);
873 CopFILE_free(PL_curcop);
874 CopFILE_setn(PL_curcop, s, len);
876 CopLINE_set(PL_curcop, atoi(n)-1);
880 /* skip space before PL_thistoken */
883 S_skipspace0(pTHX_ register char *s)
890 PL_thiswhite = newSVpvs("");
891 sv_catsv(PL_thiswhite, PL_skipwhite);
892 sv_free(PL_skipwhite);
895 PL_realtokenstart = s - SvPVX(PL_linestr);
899 /* skip space after PL_thistoken */
902 S_skipspace1(pTHX_ register char *s)
904 const char *start = s;
905 I32 startoff = start - SvPVX(PL_linestr);
910 start = SvPVX(PL_linestr) + startoff;
911 if (!PL_thistoken && PL_realtokenstart >= 0) {
912 const char * const tstart = SvPVX(PL_linestr) + PL_realtokenstart;
913 PL_thistoken = newSVpvn(tstart, start - tstart);
915 PL_realtokenstart = -1;
918 PL_nextwhite = newSVpvs("");
919 sv_catsv(PL_nextwhite, PL_skipwhite);
920 sv_free(PL_skipwhite);
927 S_skipspace2(pTHX_ register char *s, SV **svp)
930 const I32 bufptroff = PL_bufptr - SvPVX(PL_linestr);
931 const I32 startoff = s - SvPVX(PL_linestr);
934 PL_bufptr = SvPVX(PL_linestr) + bufptroff;
935 if (!PL_madskills || !svp)
937 start = SvPVX(PL_linestr) + startoff;
938 if (!PL_thistoken && PL_realtokenstart >= 0) {
939 char * const tstart = SvPVX(PL_linestr) + PL_realtokenstart;
940 PL_thistoken = newSVpvn(tstart, start - tstart);
941 PL_realtokenstart = -1;
946 sv_setsv(*svp, PL_skipwhite);
947 sv_free(PL_skipwhite);
956 S_update_debugger_info(pTHX_ SV *orig_sv, const char *buf, STRLEN len)
958 AV *av = CopFILEAVx(PL_curcop);
960 SV * const sv = newSV_type(SVt_PVMG);
962 sv_setsv(sv, orig_sv);
964 sv_setpvn(sv, buf, len);
967 av_store(av, (I32)CopLINE(PL_curcop), sv);
973 * Called to gobble the appropriate amount and type of whitespace.
974 * Skips comments as well.
978 S_skipspace(pTHX_ register char *s)
983 int startoff = s - SvPVX(PL_linestr);
986 sv_free(PL_skipwhite);
991 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
992 while (s < PL_bufend && SPACE_OR_TAB(*s))
1002 SSize_t oldprevlen, oldoldprevlen;
1003 SSize_t oldloplen = 0, oldunilen = 0;
1004 while (s < PL_bufend && isSPACE(*s)) {
1005 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
1010 if (s < PL_bufend && *s == '#') {
1011 while (s < PL_bufend && *s != '\n')
1013 if (s < PL_bufend) {
1015 if (PL_in_eval && !PL_rsfp) {
1022 /* only continue to recharge the buffer if we're at the end
1023 * of the buffer, we're not reading from a source filter, and
1024 * we're in normal lexing mode
1026 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
1027 PL_lex_state == LEX_FORMLINE)
1034 /* try to recharge the buffer */
1036 curoff = s - SvPVX(PL_linestr);
1039 if ((s = filter_gets(PL_linestr, PL_rsfp,
1040 (prevlen = SvCUR(PL_linestr)))) == NULL)
1043 if (PL_madskills && curoff != startoff) {
1045 PL_skipwhite = newSVpvs("");
1046 sv_catpvn(PL_skipwhite, SvPVX(PL_linestr) + startoff,
1050 /* mustn't throw out old stuff yet if madpropping */
1051 SvCUR(PL_linestr) = curoff;
1052 s = SvPVX(PL_linestr) + curoff;
1054 if (curoff && s[-1] == '\n')
1058 /* end of file. Add on the -p or -n magic */
1059 /* XXX these shouldn't really be added here, can't set PL_faketokens */
1062 sv_catpvs(PL_linestr,
1063 ";}continue{print or die qq(-p destination: $!\\n);}");
1065 sv_setpvs(PL_linestr,
1066 ";}continue{print or die qq(-p destination: $!\\n);}");
1068 PL_minus_n = PL_minus_p = 0;
1070 else if (PL_minus_n) {
1072 sv_catpvn(PL_linestr, ";}", 2);
1074 sv_setpvn(PL_linestr, ";}", 2);
1080 sv_catpvn(PL_linestr,";", 1);
1082 sv_setpvn(PL_linestr,";", 1);
1085 /* reset variables for next time we lex */
1086 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
1092 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
1093 PL_last_lop = PL_last_uni = NULL;
1095 /* Close the filehandle. Could be from -P preprocessor,
1096 * STDIN, or a regular file. If we were reading code from
1097 * STDIN (because the commandline held no -e or filename)
1098 * then we don't close it, we reset it so the code can
1099 * read from STDIN too.
1102 if (PL_preprocess && !PL_in_eval)
1103 (void)PerlProc_pclose(PL_rsfp);
1104 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
1105 PerlIO_clearerr(PL_rsfp);
1107 (void)PerlIO_close(PL_rsfp);
1112 /* not at end of file, so we only read another line */
1113 /* make corresponding updates to old pointers, for yyerror() */
1114 oldprevlen = PL_oldbufptr - PL_bufend;
1115 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
1117 oldunilen = PL_last_uni - PL_bufend;
1119 oldloplen = PL_last_lop - PL_bufend;
1120 PL_linestart = PL_bufptr = s + prevlen;
1121 PL_bufend = s + SvCUR(PL_linestr);
1123 PL_oldbufptr = s + oldprevlen;
1124 PL_oldoldbufptr = s + oldoldprevlen;
1126 PL_last_uni = s + oldunilen;
1128 PL_last_lop = s + oldloplen;
1131 /* debugger active and we're not compiling the debugger code,
1132 * so store the line into the debugger's array of lines
1134 if (PERLDB_LINE && PL_curstash != PL_debstash)
1135 update_debugger_info(NULL, PL_bufptr, PL_bufend - PL_bufptr);
1142 PL_skipwhite = newSVpvs("");
1143 curoff = s - SvPVX(PL_linestr);
1144 if (curoff - startoff)
1145 sv_catpvn(PL_skipwhite, SvPVX(PL_linestr) + startoff,
1154 * Check the unary operators to ensure there's no ambiguity in how they're
1155 * used. An ambiguous piece of code would be:
1157 * This doesn't mean rand() + 5. Because rand() is a unary operator,
1158 * the +5 is its argument.
1168 if (PL_oldoldbufptr != PL_last_uni)
1170 while (isSPACE(*PL_last_uni))
1173 while (isALNUM_lazy_if(s,UTF) || *s == '-')
1175 if ((t = strchr(s, '(')) && t < PL_bufptr)
1178 if (ckWARN_d(WARN_AMBIGUOUS)){
1179 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
1180 "Warning: Use of \"%.*s\" without parentheses is ambiguous",
1181 (int)(s - PL_last_uni), PL_last_uni);
1186 * LOP : macro to build a list operator. Its behaviour has been replaced
1187 * with a subroutine, S_lop() for which LOP is just another name.
1190 #define LOP(f,x) return lop(f,x,s)
1194 * Build a list operator (or something that might be one). The rules:
1195 * - if we have a next token, then it's a list operator [why?]
1196 * - if the next thing is an opening paren, then it's a function
1197 * - else it's a list operator
1201 S_lop(pTHX_ I32 f, int x, char *s)
1208 PL_last_lop = PL_oldbufptr;
1209 PL_last_lop_op = (OPCODE)f;
1212 return REPORT(LSTOP);
1215 return REPORT(LSTOP);
1218 return REPORT(FUNC);
1221 return REPORT(FUNC);
1223 return REPORT(LSTOP);
1229 * Sets up for an eventual force_next(). start_force(0) basically does
1230 * an unshift, while start_force(-1) does a push. yylex removes items
1235 S_start_force(pTHX_ int where)
1239 if (where < 0) /* so people can duplicate start_force(PL_curforce) */
1240 where = PL_lasttoke;
1241 assert(PL_curforce < 0 || PL_curforce == where);
1242 if (PL_curforce != where) {
1243 for (i = PL_lasttoke; i > where; --i) {
1244 PL_nexttoke[i] = PL_nexttoke[i-1];
1248 if (PL_curforce < 0) /* in case of duplicate start_force() */
1249 Zero(&PL_nexttoke[where], 1, NEXTTOKE);
1250 PL_curforce = where;
1253 curmad('^', newSVpvs(""));
1254 CURMAD('_', PL_nextwhite);
1259 S_curmad(pTHX_ char slot, SV *sv)
1265 if (PL_curforce < 0)
1266 where = &PL_thismad;
1268 where = &PL_nexttoke[PL_curforce].next_mad;
1271 sv_setpvn(sv, "", 0);
1274 if (UTF && is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
1276 else if (PL_encoding) {
1277 sv_recode_to_utf8(sv, PL_encoding);
1282 /* keep a slot open for the head of the list? */
1283 if (slot != '_' && *where && (*where)->mad_key == '^') {
1284 (*where)->mad_key = slot;
1285 sv_free((SV*)((*where)->mad_val));
1286 (*where)->mad_val = (void*)sv;
1289 addmad(newMADsv(slot, sv), where, 0);
1292 # define start_force(where) NOOP
1293 # define curmad(slot, sv) NOOP
1298 * When the lexer realizes it knows the next token (for instance,
1299 * it is reordering tokens for the parser) then it can call S_force_next
1300 * to know what token to return the next time the lexer is called. Caller
1301 * will need to set PL_nextval[] (or PL_nexttoke[].next_val with PERL_MAD),
1302 * and possibly PL_expect to ensure the lexer handles the token correctly.
1306 S_force_next(pTHX_ I32 type)
1310 if (PL_curforce < 0)
1311 start_force(PL_lasttoke);
1312 PL_nexttoke[PL_curforce].next_type = type;
1313 if (PL_lex_state != LEX_KNOWNEXT)
1314 PL_lex_defer = PL_lex_state;
1315 PL_lex_state = LEX_KNOWNEXT;
1316 PL_lex_expect = PL_expect;
1319 PL_nexttype[PL_nexttoke] = type;
1321 if (PL_lex_state != LEX_KNOWNEXT) {
1322 PL_lex_defer = PL_lex_state;
1323 PL_lex_expect = PL_expect;
1324 PL_lex_state = LEX_KNOWNEXT;
1330 S_newSV_maybe_utf8(pTHX_ const char *start, STRLEN len)
1333 SV * const sv = newSVpvn(start,len);
1334 if (UTF && !IN_BYTES && is_utf8_string((const U8*)start, len))
1341 * When the lexer knows the next thing is a word (for instance, it has
1342 * just seen -> and it knows that the next char is a word char, then
1343 * it calls S_force_word to stick the next word into the PL_nexttoke/val
1347 * char *start : buffer position (must be within PL_linestr)
1348 * int token : PL_next* will be this type of bare word (e.g., METHOD,WORD)
1349 * int check_keyword : if true, Perl checks to make sure the word isn't
1350 * a keyword (do this if the word is a label, e.g. goto FOO)
1351 * int allow_pack : if true, : characters will also be allowed (require,
1352 * use, etc. do this)
1353 * int allow_initial_tick : used by the "sub" lexer only.
1357 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
1363 start = SKIPSPACE1(start);
1365 if (isIDFIRST_lazy_if(s,UTF) ||
1366 (allow_pack && *s == ':') ||
1367 (allow_initial_tick && *s == '\'') )
1369 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
1370 if (check_keyword && keyword(PL_tokenbuf, len, 0))
1372 start_force(PL_curforce);
1374 curmad('X', newSVpvn(start,s-start));
1375 if (token == METHOD) {
1380 PL_expect = XOPERATOR;
1384 curmad('g', newSVpvs( "forced" ));
1385 NEXTVAL_NEXTTOKE.opval
1386 = (OP*)newSVOP(OP_CONST,0,
1387 S_newSV_maybe_utf8(aTHX_ PL_tokenbuf, len));
1388 NEXTVAL_NEXTTOKE.opval->op_private |= OPpCONST_BARE;
1396 * Called when the lexer wants $foo *foo &foo etc, but the program
1397 * text only contains the "foo" portion. The first argument is a pointer
1398 * to the "foo", and the second argument is the type symbol to prefix.
1399 * Forces the next token to be a "WORD".
1400 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
1404 S_force_ident(pTHX_ register const char *s, int kind)
1408 const STRLEN len = strlen(s);
1409 OP* const o = (OP*)newSVOP(OP_CONST, 0, newSVpvn(s, len));
1410 start_force(PL_curforce);
1411 NEXTVAL_NEXTTOKE.opval = o;
1414 o->op_private = OPpCONST_ENTERED;
1415 /* XXX see note in pp_entereval() for why we forgo typo
1416 warnings if the symbol must be introduced in an eval.
1418 gv_fetchpvn_flags(s, len,
1419 PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL)
1421 kind == '$' ? SVt_PV :
1422 kind == '@' ? SVt_PVAV :
1423 kind == '%' ? SVt_PVHV :
1431 Perl_str_to_version(pTHX_ SV *sv)
1436 const char *start = SvPV_const(sv,len);
1437 const char * const end = start + len;
1438 const bool utf = SvUTF8(sv) ? TRUE : FALSE;
1439 while (start < end) {
1443 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
1448 retval += ((NV)n)/nshift;
1457 * Forces the next token to be a version number.
1458 * If the next token appears to be an invalid version number, (e.g. "v2b"),
1459 * and if "guessing" is TRUE, then no new token is created (and the caller
1460 * must use an alternative parsing method).
1464 S_force_version(pTHX_ char *s, int guessing)
1470 I32 startoff = s - SvPVX(PL_linestr);
1479 while (isDIGIT(*d) || *d == '_' || *d == '.')
1483 start_force(PL_curforce);
1484 curmad('X', newSVpvn(s,d-s));
1487 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
1489 s = scan_num(s, &yylval);
1490 version = yylval.opval;
1491 ver = cSVOPx(version)->op_sv;
1492 if (SvPOK(ver) && !SvNIOK(ver)) {
1493 SvUPGRADE(ver, SVt_PVNV);
1494 SvNV_set(ver, str_to_version(ver));
1495 SvNOK_on(ver); /* hint that it is a version */
1498 else if (guessing) {
1501 sv_free(PL_nextwhite); /* let next token collect whitespace */
1503 s = SvPVX(PL_linestr) + startoff;
1511 if (PL_madskills && !version) {
1512 sv_free(PL_nextwhite); /* let next token collect whitespace */
1514 s = SvPVX(PL_linestr) + startoff;
1517 /* NOTE: The parser sees the package name and the VERSION swapped */
1518 start_force(PL_curforce);
1519 NEXTVAL_NEXTTOKE.opval = version;
1527 * Tokenize a quoted string passed in as an SV. It finds the next
1528 * chunk, up to end of string or a backslash. It may make a new
1529 * SV containing that chunk (if HINT_NEW_STRING is on). It also
1534 S_tokeq(pTHX_ SV *sv)
1538 register char *send;
1546 s = SvPV_force(sv, len);
1547 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
1550 while (s < send && *s != '\\')
1555 if ( PL_hints & HINT_NEW_STRING ) {
1556 pv = sv_2mortal(newSVpvn(SvPVX_const(pv), len));
1562 if (s + 1 < send && (s[1] == '\\'))
1563 s++; /* all that, just for this */
1568 SvCUR_set(sv, d - SvPVX_const(sv));
1570 if ( PL_hints & HINT_NEW_STRING )
1571 return new_constant(NULL, 0, "q", sv, pv, "q");
1576 * Now come three functions related to double-quote context,
1577 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
1578 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
1579 * interact with PL_lex_state, and create fake ( ... ) argument lists
1580 * to handle functions and concatenation.
1581 * They assume that whoever calls them will be setting up a fake
1582 * join call, because each subthing puts a ',' after it. This lets
1585 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
1587 * (I'm not sure whether the spurious commas at the end of lcfirst's
1588 * arguments and join's arguments are created or not).
1593 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
1595 * Pattern matching will set PL_lex_op to the pattern-matching op to
1596 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
1598 * OP_CONST and OP_READLINE are easy--just make the new op and return.
1600 * Everything else becomes a FUNC.
1602 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
1603 * had an OP_CONST or OP_READLINE). This just sets us up for a
1604 * call to S_sublex_push().
1608 S_sublex_start(pTHX)
1611 register const I32 op_type = yylval.ival;
1613 if (op_type == OP_NULL) {
1614 yylval.opval = PL_lex_op;
1618 if (op_type == OP_CONST || op_type == OP_READLINE) {
1619 SV *sv = tokeq(PL_lex_stuff);
1621 if (SvTYPE(sv) == SVt_PVIV) {
1622 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
1624 const char * const p = SvPV_const(sv, len);
1625 SV * const nsv = newSVpvn(p, len);
1631 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
1632 PL_lex_stuff = NULL;
1633 /* Allow <FH> // "foo" */
1634 if (op_type == OP_READLINE)
1635 PL_expect = XTERMORDORDOR;
1638 else if (op_type == OP_BACKTICK && PL_lex_op) {
1639 /* readpipe() vas overriden */
1640 cSVOPx(cLISTOPx(cUNOPx(PL_lex_op)->op_first)->op_first->op_sibling)->op_sv = tokeq(PL_lex_stuff);
1641 yylval.opval = PL_lex_op;
1643 PL_lex_stuff = NULL;
1647 PL_sublex_info.super_state = PL_lex_state;
1648 PL_sublex_info.sub_inwhat = (U16)op_type;
1649 PL_sublex_info.sub_op = PL_lex_op;
1650 PL_lex_state = LEX_INTERPPUSH;
1654 yylval.opval = PL_lex_op;
1664 * Create a new scope to save the lexing state. The scope will be
1665 * ended in S_sublex_done. Returns a '(', starting the function arguments
1666 * to the uc, lc, etc. found before.
1667 * Sets PL_lex_state to LEX_INTERPCONCAT.
1676 PL_lex_state = PL_sublex_info.super_state;
1677 SAVEBOOL(PL_lex_dojoin);
1678 SAVEI32(PL_lex_brackets);
1679 SAVEI32(PL_lex_casemods);
1680 SAVEI32(PL_lex_starts);
1681 SAVEI8(PL_lex_state);
1682 SAVEVPTR(PL_lex_inpat);
1683 SAVEI16(PL_lex_inwhat);
1684 SAVECOPLINE(PL_curcop);
1685 SAVEPPTR(PL_bufptr);
1686 SAVEPPTR(PL_bufend);
1687 SAVEPPTR(PL_oldbufptr);
1688 SAVEPPTR(PL_oldoldbufptr);
1689 SAVEPPTR(PL_last_lop);
1690 SAVEPPTR(PL_last_uni);
1691 SAVEPPTR(PL_linestart);
1692 SAVESPTR(PL_linestr);
1693 SAVEGENERICPV(PL_lex_brackstack);
1694 SAVEGENERICPV(PL_lex_casestack);
1696 PL_linestr = PL_lex_stuff;
1697 PL_lex_stuff = NULL;
1699 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1700 = SvPVX(PL_linestr);
1701 PL_bufend += SvCUR(PL_linestr);
1702 PL_last_lop = PL_last_uni = NULL;
1703 SAVEFREESV(PL_linestr);
1705 PL_lex_dojoin = FALSE;
1706 PL_lex_brackets = 0;
1707 Newx(PL_lex_brackstack, 120, char);
1708 Newx(PL_lex_casestack, 12, char);
1709 PL_lex_casemods = 0;
1710 *PL_lex_casestack = '\0';
1712 PL_lex_state = LEX_INTERPCONCAT;
1713 CopLINE_set(PL_curcop, (line_t)PL_multi_start);
1715 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1716 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1717 PL_lex_inpat = PL_sublex_info.sub_op;
1719 PL_lex_inpat = NULL;
1726 * Restores lexer state after a S_sublex_push.
1733 if (!PL_lex_starts++) {
1734 SV * const sv = newSVpvs("");
1735 if (SvUTF8(PL_linestr))
1737 PL_expect = XOPERATOR;
1738 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1742 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1743 PL_lex_state = LEX_INTERPCASEMOD;
1747 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1748 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1749 PL_linestr = PL_lex_repl;
1751 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1752 PL_bufend += SvCUR(PL_linestr);
1753 PL_last_lop = PL_last_uni = NULL;
1754 SAVEFREESV(PL_linestr);
1755 PL_lex_dojoin = FALSE;
1756 PL_lex_brackets = 0;
1757 PL_lex_casemods = 0;
1758 *PL_lex_casestack = '\0';
1760 if (SvEVALED(PL_lex_repl)) {
1761 PL_lex_state = LEX_INTERPNORMAL;
1763 /* we don't clear PL_lex_repl here, so that we can check later
1764 whether this is an evalled subst; that means we rely on the
1765 logic to ensure sublex_done() is called again only via the
1766 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1769 PL_lex_state = LEX_INTERPCONCAT;
1779 PL_endwhite = newSVpvs("");
1780 sv_catsv(PL_endwhite, PL_thiswhite);
1784 sv_setpvn(PL_thistoken,"",0);
1786 PL_realtokenstart = -1;
1790 PL_bufend = SvPVX(PL_linestr);
1791 PL_bufend += SvCUR(PL_linestr);
1792 PL_expect = XOPERATOR;
1793 PL_sublex_info.sub_inwhat = 0;
1801 Extracts a pattern, double-quoted string, or transliteration. This
1804 It looks at PL_lex_inwhat and PL_lex_inpat to find out whether it's
1805 processing a pattern (PL_lex_inpat is true), a transliteration
1806 (PL_lex_inwhat == OP_TRANS is true), or a double-quoted string.
1808 Returns a pointer to the character scanned up to. If this is
1809 advanced from the start pointer supplied (i.e. if anything was
1810 successfully parsed), will leave an OP for the substring scanned
1811 in yylval. Caller must intuit reason for not parsing further
1812 by looking at the next characters herself.
1816 double-quoted style: \r and \n
1817 regexp special ones: \D \s
1820 case and quoting: \U \Q \E
1821 stops on @ and $, but not for $ as tail anchor
1823 In transliterations:
1824 characters are VERY literal, except for - not at the start or end
1825 of the string, which indicates a range. If the range is in bytes,
1826 scan_const expands the range to the full set of intermediate
1827 characters. If the range is in utf8, the hyphen is replaced with
1828 a certain range mark which will be handled by pmtrans() in op.c.
1830 In double-quoted strings:
1832 double-quoted style: \r and \n
1834 deprecated backrefs: \1 (in substitution replacements)
1835 case and quoting: \U \Q \E
1838 scan_const does *not* construct ops to handle interpolated strings.
1839 It stops processing as soon as it finds an embedded $ or @ variable
1840 and leaves it to the caller to work out what's going on.
1842 embedded arrays (whether in pattern or not) could be:
1843 @foo, @::foo, @'foo, @{foo}, @$foo, @+, @-.
1845 $ in double-quoted strings must be the symbol of an embedded scalar.
1847 $ in pattern could be $foo or could be tail anchor. Assumption:
1848 it's a tail anchor if $ is the last thing in the string, or if it's
1849 followed by one of "()| \r\n\t"
1851 \1 (backreferences) are turned into $1
1853 The structure of the code is
1854 while (there's a character to process) {
1855 handle transliteration ranges
1856 skip regexp comments /(?#comment)/ and codes /(?{code})/
1857 skip #-initiated comments in //x patterns
1858 check for embedded arrays
1859 check for embedded scalars
1861 leave intact backslashes from leaveit (below)
1862 deprecate \1 in substitution replacements
1863 handle string-changing backslashes \l \U \Q \E, etc.
1864 switch (what was escaped) {
1865 handle \- in a transliteration (becomes a literal -)
1866 handle \132 (octal characters)
1867 handle \x15 and \x{1234} (hex characters)
1868 handle \N{name} (named characters)
1869 handle \cV (control characters)
1870 handle printf-style backslashes (\f, \r, \n, etc)
1872 } (end if backslash)
1873 } (end while character to read)
1878 S_scan_const(pTHX_ char *start)
1881 register char *send = PL_bufend; /* end of the constant */
1882 SV *sv = newSV(send - start); /* sv for the constant */
1883 register char *s = start; /* start of the constant */
1884 register char *d = SvPVX(sv); /* destination for copies */
1885 bool dorange = FALSE; /* are we in a translit range? */
1886 bool didrange = FALSE; /* did we just finish a range? */
1887 I32 has_utf8 = FALSE; /* Output constant is UTF8 */
1888 I32 this_utf8 = UTF; /* The source string is assumed to be UTF8 */
1891 UV literal_endpoint = 0;
1892 bool native_range = TRUE; /* turned to FALSE if the first endpoint is Unicode. */
1895 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1896 /* If we are doing a trans and we know we want UTF8 set expectation */
1897 has_utf8 = PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF);
1898 this_utf8 = PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1902 while (s < send || dorange) {
1903 /* get transliterations out of the way (they're most literal) */
1904 if (PL_lex_inwhat == OP_TRANS) {
1905 /* expand a range A-Z to the full set of characters. AIE! */
1907 I32 i; /* current expanded character */
1908 I32 min; /* first character in range */
1909 I32 max; /* last character in range */
1920 char * const c = (char*)utf8_hop((U8*)d, -1);
1924 *c = (char)UTF_TO_NATIVE(0xff);
1925 /* mark the range as done, and continue */
1931 i = d - SvPVX_const(sv); /* remember current offset */
1934 SvLEN(sv) + (has_utf8 ?
1935 (512 - UTF_CONTINUATION_MARK +
1938 /* How many two-byte within 0..255: 128 in UTF-8,
1939 * 96 in UTF-8-mod. */
1941 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1943 d = SvPVX(sv) + i; /* refresh d after realloc */
1947 for (j = 0; j <= 1; j++) {
1948 char * const c = (char*)utf8_hop((U8*)d, -1);
1949 const UV uv = utf8n_to_uvchr((U8*)c, d - c, NULL, 0);
1955 max = (U8)0xff; /* only to \xff */
1956 uvmax = uv; /* \x{100} to uvmax */
1958 d = c; /* eat endpoint chars */
1963 d -= 2; /* eat the first char and the - */
1964 min = (U8)*d; /* first char in range */
1965 max = (U8)d[1]; /* last char in range */
1972 "Invalid range \"%c-%c\" in transliteration operator",
1973 (char)min, (char)max);
1977 if (literal_endpoint == 2 &&
1978 ((isLOWER(min) && isLOWER(max)) ||
1979 (isUPPER(min) && isUPPER(max)))) {
1981 for (i = min; i <= max; i++)
1983 *d++ = NATIVE_TO_NEED(has_utf8,i);
1985 for (i = min; i <= max; i++)
1987 *d++ = NATIVE_TO_NEED(has_utf8,i);
1992 for (i = min; i <= max; i++)
1995 const U8 ch = (U8)NATIVE_TO_UTF(i);
1996 if (UNI_IS_INVARIANT(ch))
1999 *d++ = (U8)UTF8_EIGHT_BIT_HI(ch);
2000 *d++ = (U8)UTF8_EIGHT_BIT_LO(ch);
2009 d = (char*)uvchr_to_utf8((U8*)d, 0x100);
2011 *d++ = (char)UTF_TO_NATIVE(0xff);
2013 d = (char*)uvchr_to_utf8((U8*)d, uvmax);
2017 /* mark the range as done, and continue */
2021 literal_endpoint = 0;
2026 /* range begins (ignore - as first or last char) */
2027 else if (*s == '-' && s+1 < send && s != start) {
2029 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
2036 *d++ = (char)UTF_TO_NATIVE(0xff); /* use illegal utf8 byte--see pmtrans */
2046 literal_endpoint = 0;
2047 native_range = TRUE;
2052 /* if we get here, we're not doing a transliteration */
2054 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
2055 except for the last char, which will be done separately. */
2056 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
2058 while (s+1 < send && *s != ')')
2059 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
2061 else if (s[2] == '{' /* This should match regcomp.c */
2062 || (s[2] == '?' && s[3] == '{'))
2065 char *regparse = s + (s[2] == '{' ? 3 : 4);
2068 while (count && (c = *regparse)) {
2069 if (c == '\\' && regparse[1])
2077 if (*regparse != ')')
2078 regparse--; /* Leave one char for continuation. */
2079 while (s < regparse)
2080 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
2084 /* likewise skip #-initiated comments in //x patterns */
2085 else if (*s == '#' && PL_lex_inpat &&
2086 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
2087 while (s+1 < send && *s != '\n')
2088 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
2091 /* check for embedded arrays
2092 (@foo, @::foo, @'foo, @{foo}, @$foo, @+, @-)
2094 else if (*s == '@' && s[1]) {
2095 if (isALNUM_lazy_if(s+1,UTF))
2097 if (strchr(":'{$", s[1]))
2099 if (!PL_lex_inpat && (s[1] == '+' || s[1] == '-'))
2100 break; /* in regexp, neither @+ nor @- are interpolated */
2103 /* check for embedded scalars. only stop if we're sure it's a
2106 else if (*s == '$') {
2107 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
2109 if (s + 1 < send && !strchr("()| \r\n\t", s[1]))
2110 break; /* in regexp, $ might be tail anchor */
2113 /* End of else if chain - OP_TRANS rejoin rest */
2116 if (*s == '\\' && s+1 < send) {
2119 /* deprecate \1 in strings and substitution replacements */
2120 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
2121 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
2123 if (ckWARN(WARN_SYNTAX))
2124 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\\%c better written as $%c", *s, *s);
2129 /* string-change backslash escapes */
2130 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
2134 /* skip any other backslash escapes in a pattern */
2135 else if (PL_lex_inpat) {
2136 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
2137 goto default_action;
2140 /* if we get here, it's either a quoted -, or a digit */
2143 /* quoted - in transliterations */
2145 if (PL_lex_inwhat == OP_TRANS) {
2152 if ((isALPHA(*s) || isDIGIT(*s)) &&
2154 Perl_warner(aTHX_ packWARN(WARN_MISC),
2155 "Unrecognized escape \\%c passed through",
2157 /* default action is to copy the quoted character */
2158 goto default_action;
2161 /* \132 indicates an octal constant */
2162 case '0': case '1': case '2': case '3':
2163 case '4': case '5': case '6': case '7':
2167 uv = grok_oct(s, &len, &flags, NULL);
2170 goto NUM_ESCAPE_INSERT;
2172 /* \x24 indicates a hex constant */
2176 char* const e = strchr(s, '}');
2177 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
2178 PERL_SCAN_DISALLOW_PREFIX;
2183 yyerror("Missing right brace on \\x{}");
2187 uv = grok_hex(s, &len, &flags, NULL);
2193 I32 flags = PERL_SCAN_DISALLOW_PREFIX;
2194 uv = grok_hex(s, &len, &flags, NULL);
2200 /* Insert oct or hex escaped character.
2201 * There will always enough room in sv since such
2202 * escapes will be longer than any UTF-8 sequence
2203 * they can end up as. */
2205 /* We need to map to chars to ASCII before doing the tests
2208 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(uv))) {
2209 if (!has_utf8 && uv > 255) {
2210 /* Might need to recode whatever we have
2211 * accumulated so far if it contains any
2214 * (Can't we keep track of that and avoid
2215 * this rescan? --jhi)
2219 for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) {
2220 if (!NATIVE_IS_INVARIANT(*c)) {
2225 const STRLEN offset = d - SvPVX_const(sv);
2227 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
2231 while (src >= (const U8 *)SvPVX_const(sv)) {
2232 if (!NATIVE_IS_INVARIANT(*src)) {
2233 const U8 ch = NATIVE_TO_ASCII(*src);
2234 *dst-- = (U8)UTF8_EIGHT_BIT_LO(ch);
2235 *dst-- = (U8)UTF8_EIGHT_BIT_HI(ch);
2245 if (has_utf8 || uv > 255) {
2246 d = (char*)uvchr_to_utf8((U8*)d, uv);
2248 if (PL_lex_inwhat == OP_TRANS &&
2249 PL_sublex_info.sub_op) {
2250 PL_sublex_info.sub_op->op_private |=
2251 (PL_lex_repl ? OPpTRANS_FROM_UTF
2255 if (uv > 255 && !dorange)
2256 native_range = FALSE;
2268 /* \N{LATIN SMALL LETTER A} is a named character */
2272 char* e = strchr(s, '}');
2279 yyerror("Missing right brace on \\N{}");
2283 if (e > s + 2 && s[1] == 'U' && s[2] == '+') {
2285 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
2286 PERL_SCAN_DISALLOW_PREFIX;
2289 uv = grok_hex(s, &len, &flags, NULL);
2290 if ( e > s && len != (STRLEN)(e - s) ) {
2294 goto NUM_ESCAPE_INSERT;
2296 res = newSVpvn(s + 1, e - s - 1);
2297 type = newSVpvn(s - 2,e - s + 3);
2298 res = new_constant( NULL, 0, "charnames",
2299 res, NULL, SvPVX(type) );
2302 sv_utf8_upgrade(res);
2303 str = SvPV_const(res,len);
2304 #ifdef EBCDIC_NEVER_MIND
2305 /* charnames uses pack U and that has been
2306 * recently changed to do the below uni->native
2307 * mapping, so this would be redundant (and wrong,
2308 * the code point would be doubly converted).
2309 * But leave this in just in case the pack U change
2310 * gets revoked, but the semantics is still
2311 * desireable for charnames. --jhi */
2313 UV uv = utf8_to_uvchr((const U8*)str, 0);
2316 U8 tmpbuf[UTF8_MAXBYTES+1], *d;
2318 d = uvchr_to_utf8(tmpbuf, UNI_TO_NATIVE(uv));
2319 sv_setpvn(res, (char *)tmpbuf, d - tmpbuf);
2320 str = SvPV_const(res, len);
2324 if (!has_utf8 && SvUTF8(res)) {
2325 const char * const ostart = SvPVX_const(sv);
2326 SvCUR_set(sv, d - ostart);
2329 sv_utf8_upgrade(sv);
2330 /* this just broke our allocation above... */
2331 SvGROW(sv, (STRLEN)(send - start));
2332 d = SvPVX(sv) + SvCUR(sv);
2335 if (len > (STRLEN)(e - s + 4)) { /* I _guess_ 4 is \N{} --jhi */
2336 const char * const odest = SvPVX_const(sv);
2338 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
2339 d = SvPVX(sv) + (d - odest);
2343 native_range = FALSE; /* \N{} is guessed to be Unicode */
2345 Copy(str, d, len, char);
2352 yyerror("Missing braces on \\N{}");
2355 /* \c is a control character */
2364 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
2367 yyerror("Missing control char name in \\c");
2371 /* printf-style backslashes, formfeeds, newlines, etc */
2373 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
2376 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
2379 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
2382 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
2385 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
2388 *d++ = ASCII_TO_NEED(has_utf8,'\033');
2391 *d++ = ASCII_TO_NEED(has_utf8,'\007');
2397 } /* end if (backslash) */
2404 /* If we started with encoded form, or already know we want it
2405 and then encode the next character */
2406 if ((has_utf8 || this_utf8) && !NATIVE_IS_INVARIANT((U8)(*s))) {
2408 const UV nextuv = (this_utf8) ? utf8n_to_uvchr((U8*)s, send - s, &len, 0) : (UV) ((U8) *s);
2409 const STRLEN need = UNISKIP(NATIVE_TO_UNI(nextuv));
2412 /* encoded value larger than old, need extra space (NOTE: SvCUR() not set here) */
2413 const STRLEN off = d - SvPVX_const(sv);
2414 d = SvGROW(sv, SvLEN(sv) + (need-len)) + off;
2416 d = (char*)uvchr_to_utf8((U8*)d, nextuv);
2419 if (uv > 255 && !dorange)
2420 native_range = FALSE;
2424 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
2426 } /* while loop to process each character */
2428 /* terminate the string and set up the sv */
2430 SvCUR_set(sv, d - SvPVX_const(sv));
2431 if (SvCUR(sv) >= SvLEN(sv))
2432 Perl_croak(aTHX_ "panic: constant overflowed allocated space");
2435 if (PL_encoding && !has_utf8) {
2436 sv_recode_to_utf8(sv, PL_encoding);
2442 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
2443 PL_sublex_info.sub_op->op_private |=
2444 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
2448 /* shrink the sv if we allocated more than we used */
2449 if (SvCUR(sv) + 5 < SvLEN(sv)) {
2450 SvPV_shrink_to_cur(sv);
2453 /* return the substring (via yylval) only if we parsed anything */
2454 if (s > PL_bufptr) {
2455 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
2456 sv = new_constant(start, s - start,
2457 (const char *)(PL_lex_inpat ? "qr" : "q"),
2460 (( PL_lex_inwhat == OP_TRANS
2462 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
2465 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2472 * Returns TRUE if there's more to the expression (e.g., a subscript),
2475 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
2477 * ->[ and ->{ return TRUE
2478 * { and [ outside a pattern are always subscripts, so return TRUE
2479 * if we're outside a pattern and it's not { or [, then return FALSE
2480 * if we're in a pattern and the first char is a {
2481 * {4,5} (any digits around the comma) returns FALSE
2482 * if we're in a pattern and the first char is a [
2484 * [SOMETHING] has a funky algorithm to decide whether it's a
2485 * character class or not. It has to deal with things like
2486 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
2487 * anything else returns TRUE
2490 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
2493 S_intuit_more(pTHX_ register char *s)
2496 if (PL_lex_brackets)
2498 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
2500 if (*s != '{' && *s != '[')
2505 /* In a pattern, so maybe we have {n,m}. */
2522 /* On the other hand, maybe we have a character class */
2525 if (*s == ']' || *s == '^')
2528 /* this is terrifying, and it works */
2529 int weight = 2; /* let's weigh the evidence */
2531 unsigned char un_char = 255, last_un_char;
2532 const char * const send = strchr(s,']');
2533 char tmpbuf[sizeof PL_tokenbuf * 4];
2535 if (!send) /* has to be an expression */
2538 Zero(seen,256,char);
2541 else if (isDIGIT(*s)) {
2543 if (isDIGIT(s[1]) && s[2] == ']')
2549 for (; s < send; s++) {
2550 last_un_char = un_char;
2551 un_char = (unsigned char)*s;
2556 weight -= seen[un_char] * 10;
2557 if (isALNUM_lazy_if(s+1,UTF)) {
2559 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
2560 len = (int)strlen(tmpbuf);
2561 if (len > 1 && gv_fetchpvn_flags(tmpbuf, len, 0, SVt_PV))
2566 else if (*s == '$' && s[1] &&
2567 strchr("[#!%*<>()-=",s[1])) {
2568 if (/*{*/ strchr("])} =",s[2]))
2577 if (strchr("wds]",s[1]))
2579 else if (seen[(U8)'\''] || seen[(U8)'"'])
2581 else if (strchr("rnftbxcav",s[1]))
2583 else if (isDIGIT(s[1])) {
2585 while (s[1] && isDIGIT(s[1]))
2595 if (strchr("aA01! ",last_un_char))
2597 if (strchr("zZ79~",s[1]))
2599 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
2600 weight -= 5; /* cope with negative subscript */
2603 if (!isALNUM(last_un_char)
2604 && !(last_un_char == '$' || last_un_char == '@'
2605 || last_un_char == '&')
2606 && isALPHA(*s) && s[1] && isALPHA(s[1])) {
2611 if (keyword(tmpbuf, d - tmpbuf, 0))
2614 if (un_char == last_un_char + 1)
2616 weight -= seen[un_char];
2621 if (weight >= 0) /* probably a character class */
2631 * Does all the checking to disambiguate
2633 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
2634 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
2636 * First argument is the stuff after the first token, e.g. "bar".
2638 * Not a method if bar is a filehandle.
2639 * Not a method if foo is a subroutine prototyped to take a filehandle.
2640 * Not a method if it's really "Foo $bar"
2641 * Method if it's "foo $bar"
2642 * Not a method if it's really "print foo $bar"
2643 * Method if it's really "foo package::" (interpreted as package->foo)
2644 * Not a method if bar is known to be a subroutine ("sub bar; foo bar")
2645 * Not a method if bar is a filehandle or package, but is quoted with
2650 S_intuit_method(pTHX_ char *start, GV *gv, CV *cv)
2653 char *s = start + (*start == '$');
2654 char tmpbuf[sizeof PL_tokenbuf];
2662 if (SvTYPE(gv) == SVt_PVGV && GvIO(gv))
2666 const char *proto = SvPVX_const(cv);
2677 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2678 /* start is the beginning of the possible filehandle/object,
2679 * and s is the end of it
2680 * tmpbuf is a copy of it
2683 if (*start == '$') {
2684 if (gv || PL_last_lop_op == OP_PRINT || PL_last_lop_op == OP_SAY ||
2685 isUPPER(*PL_tokenbuf))
2688 len = start - SvPVX(PL_linestr);
2692 start = SvPVX(PL_linestr) + len;
2696 return *s == '(' ? FUNCMETH : METHOD;
2698 if (!keyword(tmpbuf, len, 0)) {
2699 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
2703 soff = s - SvPVX(PL_linestr);
2707 indirgv = gv_fetchpvn_flags(tmpbuf, len, 0, SVt_PVCV);
2708 if (indirgv && GvCVu(indirgv))
2710 /* filehandle or package name makes it a method */
2711 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, 0)) {
2713 soff = s - SvPVX(PL_linestr);
2716 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
2717 return 0; /* no assumptions -- "=>" quotes bearword */
2719 start_force(PL_curforce);
2720 NEXTVAL_NEXTTOKE.opval = (OP*)newSVOP(OP_CONST, 0,
2721 newSVpvn(tmpbuf,len));
2722 NEXTVAL_NEXTTOKE.opval->op_private = OPpCONST_BARE;
2724 curmad('X', newSVpvn(start,SvPVX(PL_linestr) + soff - start));
2729 PL_bufptr = SvPVX(PL_linestr) + soff; /* restart before space */
2731 return *s == '(' ? FUNCMETH : METHOD;
2739 * Return a string of Perl code to load the debugger. If PERL5DB
2740 * is set, it will return the contents of that, otherwise a
2741 * compile-time require of perl5db.pl.
2749 const char * const pdb = PerlEnv_getenv("PERL5DB");
2753 SETERRNO(0,SS_NORMAL);
2754 return "BEGIN { require 'perl5db.pl' }";
2760 /* Encoded script support. filter_add() effectively inserts a
2761 * 'pre-processing' function into the current source input stream.
2762 * Note that the filter function only applies to the current source file
2763 * (e.g., it will not affect files 'require'd or 'use'd by this one).
2765 * The datasv parameter (which may be NULL) can be used to pass
2766 * private data to this instance of the filter. The filter function
2767 * can recover the SV using the FILTER_DATA macro and use it to
2768 * store private buffers and state information.
2770 * The supplied datasv parameter is upgraded to a PVIO type
2771 * and the IoDIRP/IoANY field is used to store the function pointer,
2772 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
2773 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
2774 * private use must be set using malloc'd pointers.
2778 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
2787 if (!PL_rsfp_filters)
2788 PL_rsfp_filters = newAV();
2791 SvUPGRADE(datasv, SVt_PVIO);
2792 IoANY(datasv) = FPTR2DPTR(void *, funcp); /* stash funcp into spare field */
2793 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
2794 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
2795 FPTR2DPTR(void *, IoANY(datasv)),
2796 SvPV_nolen(datasv)));
2797 av_unshift(PL_rsfp_filters, 1);
2798 av_store(PL_rsfp_filters, 0, datasv) ;
2803 /* Delete most recently added instance of this filter function. */
2805 Perl_filter_del(pTHX_ filter_t funcp)
2811 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p",
2812 FPTR2DPTR(void*, funcp)));
2814 if (!PL_parser || !PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
2816 /* if filter is on top of stack (usual case) just pop it off */
2817 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
2818 if (IoANY(datasv) == FPTR2DPTR(void *, funcp)) {
2819 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
2820 IoANY(datasv) = (void *)NULL;
2821 sv_free(av_pop(PL_rsfp_filters));
2825 /* we need to search for the correct entry and clear it */
2826 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
2830 /* Invoke the idxth filter function for the current rsfp. */
2831 /* maxlen 0 = read one text line */
2833 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
2838 /* This API is bad. It should have been using unsigned int for maxlen.
2839 Not sure if we want to change the API, but if not we should sanity
2840 check the value here. */
2841 const unsigned int correct_length
2850 if (!PL_parser || !PL_rsfp_filters)
2852 if (idx > AvFILLp(PL_rsfp_filters)) { /* Any more filters? */
2853 /* Provide a default input filter to make life easy. */
2854 /* Note that we append to the line. This is handy. */
2855 DEBUG_P(PerlIO_printf(Perl_debug_log,
2856 "filter_read %d: from rsfp\n", idx));
2857 if (correct_length) {
2860 const int old_len = SvCUR(buf_sv);
2862 /* ensure buf_sv is large enough */
2863 SvGROW(buf_sv, (STRLEN)(old_len + correct_length)) ;
2864 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len,
2865 correct_length)) <= 0) {
2866 if (PerlIO_error(PL_rsfp))
2867 return -1; /* error */
2869 return 0 ; /* end of file */
2871 SvCUR_set(buf_sv, old_len + len) ;
2874 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2875 if (PerlIO_error(PL_rsfp))
2876 return -1; /* error */
2878 return 0 ; /* end of file */
2881 return SvCUR(buf_sv);
2883 /* Skip this filter slot if filter has been deleted */
2884 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef) {
2885 DEBUG_P(PerlIO_printf(Perl_debug_log,
2886 "filter_read %d: skipped (filter deleted)\n",
2888 return FILTER_READ(idx+1, buf_sv, correct_length); /* recurse */
2890 /* Get function pointer hidden within datasv */
2891 funcp = DPTR2FPTR(filter_t, IoANY(datasv));
2892 DEBUG_P(PerlIO_printf(Perl_debug_log,
2893 "filter_read %d: via function %p (%s)\n",
2894 idx, (void*)datasv, SvPV_nolen_const(datasv)));
2895 /* Call function. The function is expected to */
2896 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2897 /* Return: <0:error, =0:eof, >0:not eof */
2898 return (*funcp)(aTHX_ idx, buf_sv, correct_length);
2902 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2905 #ifdef PERL_CR_FILTER
2906 if (!PL_rsfp_filters) {
2907 filter_add(S_cr_textfilter,NULL);
2910 if (PL_rsfp_filters) {
2912 SvCUR_set(sv, 0); /* start with empty line */
2913 if (FILTER_READ(0, sv, 0) > 0)
2914 return ( SvPVX(sv) ) ;
2919 return (sv_gets(sv, fp, append));
2923 S_find_in_my_stash(pTHX_ const char *pkgname, I32 len)
2928 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2932 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2933 (gv = gv_fetchpvn_flags(pkgname, len, 0, SVt_PVHV)))
2935 return GvHV(gv); /* Foo:: */
2938 /* use constant CLASS => 'MyClass' */
2939 gv = gv_fetchpvn_flags(pkgname, len, 0, SVt_PVCV);
2940 if (gv && GvCV(gv)) {
2941 SV * const sv = cv_const_sv(GvCV(gv));
2943 pkgname = SvPV_nolen_const(sv);
2946 return gv_stashpv(pkgname, 0);
2950 * S_readpipe_override
2951 * Check whether readpipe() is overriden, and generates the appropriate
2952 * optree, provided sublex_start() is called afterwards.
2955 S_readpipe_override(pTHX)
2958 GV *gv_readpipe = gv_fetchpvs("readpipe", GV_NOTQUAL, SVt_PVCV);
2959 yylval.ival = OP_BACKTICK;
2961 && GvCVu(gv_readpipe) && GvIMPORTED_CV(gv_readpipe))
2963 ((gvp = (GV**)hv_fetchs(PL_globalstash, "readpipe", FALSE))
2964 && (gv_readpipe = *gvp) && isGV_with_GP(gv_readpipe)
2965 && GvCVu(gv_readpipe) && GvIMPORTED_CV(gv_readpipe)))
2967 PL_lex_op = (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED,
2968 append_elem(OP_LIST,
2969 newSVOP(OP_CONST, 0, &PL_sv_undef), /* value will be read later */
2970 newCVREF(0, newGVOP(OP_GV, 0, gv_readpipe))));
2980 * The intent of this yylex wrapper is to minimize the changes to the
2981 * tokener when we aren't interested in collecting madprops. It remains
2982 * to be seen how successful this strategy will be...
2989 char *s = PL_bufptr;
2991 /* make sure PL_thiswhite is initialized */
2995 /* just do what yylex would do on pending identifier; leave PL_thiswhite alone */
2996 if (PL_pending_ident)
2997 return S_pending_ident(aTHX);
2999 /* previous token ate up our whitespace? */
3000 if (!PL_lasttoke && PL_nextwhite) {
3001 PL_thiswhite = PL_nextwhite;
3005 /* isolate the token, and figure out where it is without whitespace */
3006 PL_realtokenstart = -1;
3010 assert(PL_curforce < 0);
3012 if (!PL_thismad || PL_thismad->mad_key == '^') { /* not forced already? */
3013 if (!PL_thistoken) {
3014 if (PL_realtokenstart < 0 || !CopLINE(PL_curcop))
3015 PL_thistoken = newSVpvs("");
3017 char * const tstart = SvPVX(PL_linestr) + PL_realtokenstart;
3018 PL_thistoken = newSVpvn(tstart, s - tstart);
3021 if (PL_thismad) /* install head */
3022 CURMAD('X', PL_thistoken);
3025 /* last whitespace of a sublex? */
3026 if (optype == ')' && PL_endwhite) {
3027 CURMAD('X', PL_endwhite);
3032 /* if no whitespace and we're at EOF, bail. Otherwise fake EOF below. */
3033 if (!PL_thiswhite && !PL_endwhite && !optype) {
3034 sv_free(PL_thistoken);
3039 /* put off final whitespace till peg */
3040 if (optype == ';' && !PL_rsfp) {
3041 PL_nextwhite = PL_thiswhite;
3044 else if (PL_thisopen) {
3045 CURMAD('q', PL_thisopen);
3047 sv_free(PL_thistoken);
3051 /* Store actual token text as madprop X */
3052 CURMAD('X', PL_thistoken);
3056 /* add preceding whitespace as madprop _ */
3057 CURMAD('_', PL_thiswhite);
3061 /* add quoted material as madprop = */
3062 CURMAD('=', PL_thisstuff);
3066 /* add terminating quote as madprop Q */
3067 CURMAD('Q', PL_thisclose);
3071 /* special processing based on optype */
3075 /* opval doesn't need a TOKEN since it can already store mp */
3086 append_madprops(PL_thismad, yylval.opval, 0);
3094 addmad(newMADsv('p', PL_endwhite), &PL_thismad, 0);
3103 /* remember any fake bracket that lexer is about to discard */
3104 if (PL_lex_brackets == 1 &&
3105 ((expectation)PL_lex_brackstack[0] & XFAKEBRACK))
3108 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
3111 PL_thiswhite = newSVpvn(PL_bufptr, ++s - PL_bufptr);
3112 addmad(newMADsv('#', PL_thiswhite), &PL_thismad, 0);
3115 break; /* don't bother looking for trailing comment */
3124 /* attach a trailing comment to its statement instead of next token */
3128 if (PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == optype) {
3130 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
3132 if (*s == '\n' || *s == '#') {
3133 while (s < PL_bufend && *s != '\n')
3137 PL_thiswhite = newSVpvn(PL_bufptr, s - PL_bufptr);
3138 addmad(newMADsv('#', PL_thiswhite), &PL_thismad, 0);
3155 /* Create new token struct. Note: opvals return early above. */
3156 yylval.tkval = newTOKEN(optype, yylval, PL_thismad);
3163 S_tokenize_use(pTHX_ int is_use, char *s) {
3165 if (PL_expect != XSTATE)
3166 yyerror(Perl_form(aTHX_ "\"%s\" not allowed in expression",
3167 is_use ? "use" : "no"));
3169 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
3170 s = force_version(s, TRUE);
3171 if (*s == ';' || (s = SKIPSPACE1(s), *s == ';')) {
3172 start_force(PL_curforce);
3173 NEXTVAL_NEXTTOKE.opval = NULL;
3176 else if (*s == 'v') {
3177 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3178 s = force_version(s, FALSE);
3182 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3183 s = force_version(s, FALSE);
3185 yylval.ival = is_use;
3189 static const char* const exp_name[] =
3190 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
3191 "ATTRTERM", "TERMBLOCK", "TERMORDORDOR"
3198 Works out what to call the token just pulled out of the input
3199 stream. The yacc parser takes care of taking the ops we return and
3200 stitching them into a tree.
3206 if read an identifier
3207 if we're in a my declaration
3208 croak if they tried to say my($foo::bar)
3209 build the ops for a my() declaration
3210 if it's an access to a my() variable
3211 are we in a sort block?
3212 croak if my($a); $a <=> $b
3213 build ops for access to a my() variable
3214 if in a dq string, and they've said @foo and we can't find @foo
3216 build ops for a bareword
3217 if we already built the token before, use it.
3222 #pragma segment Perl_yylex
3228 register char *s = PL_bufptr;
3233 /* orig_keyword, gvp, and gv are initialized here because
3234 * jump to the label just_a_word_zero can bypass their
3235 * initialization later. */
3236 I32 orig_keyword = 0;
3241 SV* tmp = newSVpvs("");
3242 PerlIO_printf(Perl_debug_log, "### %"IVdf":LEX_%s/X%s %s\n",
3243 (IV)CopLINE(PL_curcop),
3244 lex_state_names[PL_lex_state],
3245 exp_name[PL_expect],
3246 pv_display(tmp, s, strlen(s), 0, 60));
3249 /* check if there's an identifier for us to look at */
3250 if (PL_pending_ident)
3251 return REPORT(S_pending_ident(aTHX));
3253 /* no identifier pending identification */
3255 switch (PL_lex_state) {
3257 case LEX_NORMAL: /* Some compilers will produce faster */
3258 case LEX_INTERPNORMAL: /* code if we comment these out. */
3262 /* when we've already built the next token, just pull it out of the queue */
3266 yylval = PL_nexttoke[PL_lasttoke].next_val;
3268 PL_thismad = PL_nexttoke[PL_lasttoke].next_mad;
3269 PL_nexttoke[PL_lasttoke].next_mad = 0;
3270 if (PL_thismad && PL_thismad->mad_key == '_') {
3271 PL_thiswhite = (SV*)PL_thismad->mad_val;
3272 PL_thismad->mad_val = 0;
3273 mad_free(PL_thismad);
3278 PL_lex_state = PL_lex_defer;
3279 PL_expect = PL_lex_expect;
3280 PL_lex_defer = LEX_NORMAL;
3281 if (!PL_nexttoke[PL_lasttoke].next_type)
3286 yylval = PL_nextval[PL_nexttoke];
3288 PL_lex_state = PL_lex_defer;
3289 PL_expect = PL_lex_expect;
3290 PL_lex_defer = LEX_NORMAL;
3294 /* FIXME - can these be merged? */
3295 return(PL_nexttoke[PL_lasttoke].next_type);
3297 return REPORT(PL_nexttype[PL_nexttoke]);
3300 /* interpolated case modifiers like \L \U, including \Q and \E.
3301 when we get here, PL_bufptr is at the \
3303 case LEX_INTERPCASEMOD:
3305 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
3306 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
3308 /* handle \E or end of string */
3309 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
3311 if (PL_lex_casemods) {
3312 const char oldmod = PL_lex_casestack[--PL_lex_casemods];
3313 PL_lex_casestack[PL_lex_casemods] = '\0';
3315 if (PL_bufptr != PL_bufend
3316 && (oldmod == 'L' || oldmod == 'U' || oldmod == 'Q')) {
3318 PL_lex_state = LEX_INTERPCONCAT;
3321 PL_thistoken = newSVpvs("\\E");
3327 while (PL_bufptr != PL_bufend &&
3328 PL_bufptr[0] == '\\' && PL_bufptr[1] == 'E') {
3330 PL_thiswhite = newSVpvs("");
3331 sv_catpvn(PL_thiswhite, PL_bufptr, 2);
3335 if (PL_bufptr != PL_bufend)
3338 PL_lex_state = LEX_INTERPCONCAT;
3342 DEBUG_T({ PerlIO_printf(Perl_debug_log,
3343 "### Saw case modifier\n"); });
3345 if (s[1] == '\\' && s[2] == 'E') {
3348 PL_thiswhite = newSVpvs("");
3349 sv_catpvn(PL_thiswhite, PL_bufptr, 4);
3352 PL_lex_state = LEX_INTERPCONCAT;
3357 if (!PL_madskills) /* when just compiling don't need correct */
3358 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
3359 tmp = *s, *s = s[2], s[2] = (char)tmp; /* misordered... */
3360 if ((*s == 'L' || *s == 'U') &&
3361 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U'))) {
3362 PL_lex_casestack[--PL_lex_casemods] = '\0';
3365 if (PL_lex_casemods > 10)
3366 Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
3367 PL_lex_casestack[PL_lex_casemods++] = *s;
3368 PL_lex_casestack[PL_lex_casemods] = '\0';
3369 PL_lex_state = LEX_INTERPCONCAT;
3370 start_force(PL_curforce);
3371 NEXTVAL_NEXTTOKE.ival = 0;
3373 start_force(PL_curforce);
3375 NEXTVAL_NEXTTOKE.ival = OP_LCFIRST;
3377 NEXTVAL_NEXTTOKE.ival = OP_UCFIRST;
3379 NEXTVAL_NEXTTOKE.ival = OP_LC;
3381 NEXTVAL_NEXTTOKE.ival = OP_UC;
3383 NEXTVAL_NEXTTOKE.ival = OP_QUOTEMETA;
3385 Perl_croak(aTHX_ "panic: yylex");
3387 SV* const tmpsv = newSVpvs("");
3388 Perl_sv_catpvf(aTHX_ tmpsv, "\\%c", *s);
3394 if (PL_lex_starts) {
3400 sv_free(PL_thistoken);
3401 PL_thistoken = newSVpvs("");
3404 /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */
3405 if (PL_lex_casemods == 1 && PL_lex_inpat)
3414 case LEX_INTERPPUSH:
3415 return REPORT(sublex_push());
3417 case LEX_INTERPSTART:
3418 if (PL_bufptr == PL_bufend)
3419 return REPORT(sublex_done());
3420 DEBUG_T({ PerlIO_printf(Perl_debug_log,
3421 "### Interpolated variable\n"); });
3423 PL_lex_dojoin = (*PL_bufptr == '@');
3424 PL_lex_state = LEX_INTERPNORMAL;
3425 if (PL_lex_dojoin) {
3426 start_force(PL_curforce);
3427 NEXTVAL_NEXTTOKE.ival = 0;
3429 start_force(PL_curforce);
3430 force_ident("\"", '$');
3431 start_force(PL_curforce);
3432 NEXTVAL_NEXTTOKE.ival = 0;
3434 start_force(PL_curforce);
3435 NEXTVAL_NEXTTOKE.ival = 0;
3437 start_force(PL_curforce);
3438 NEXTVAL_NEXTTOKE.ival = OP_JOIN; /* emulate join($", ...) */
3441 if (PL_lex_starts++) {
3446 sv_free(PL_thistoken);
3447 PL_thistoken = newSVpvs("");
3450 /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */
3451 if (!PL_lex_casemods && PL_lex_inpat)
3458 case LEX_INTERPENDMAYBE:
3459 if (intuit_more(PL_bufptr)) {
3460 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
3466 if (PL_lex_dojoin) {
3467 PL_lex_dojoin = FALSE;
3468 PL_lex_state = LEX_INTERPCONCAT;
3472 sv_free(PL_thistoken);
3473 PL_thistoken = newSVpvs("");
3478 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
3479 && SvEVALED(PL_lex_repl))
3481 if (PL_bufptr != PL_bufend)
3482 Perl_croak(aTHX_ "Bad evalled substitution pattern");
3486 case LEX_INTERPCONCAT:
3488 if (PL_lex_brackets)
3489 Perl_croak(aTHX_ "panic: INTERPCONCAT");
3491 if (PL_bufptr == PL_bufend)
3492 return REPORT(sublex_done());
3494 if (SvIVX(PL_linestr) == '\'') {
3495 SV *sv = newSVsv(PL_linestr);
3498 else if ( PL_hints & HINT_NEW_RE )
3499 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
3500 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3504 s = scan_const(PL_bufptr);
3506 PL_lex_state = LEX_INTERPCASEMOD;
3508 PL_lex_state = LEX_INTERPSTART;
3511 if (s != PL_bufptr) {
3512 start_force(PL_curforce);
3514 curmad('X', newSVpvn(PL_bufptr,s-PL_bufptr));
3516 NEXTVAL_NEXTTOKE = yylval;
3519 if (PL_lex_starts++) {
3523 sv_free(PL_thistoken);
3524 PL_thistoken = newSVpvs("");
3527 /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */
3528 if (!PL_lex_casemods && PL_lex_inpat)
3541 PL_lex_state = LEX_NORMAL;
3542 s = scan_formline(PL_bufptr);
3543 if (!PL_lex_formbrack)
3549 PL_oldoldbufptr = PL_oldbufptr;
3555 sv_free(PL_thistoken);
3558 PL_realtokenstart = s - SvPVX(PL_linestr); /* assume but undo on ws */
3562 if (isIDFIRST_lazy_if(s,UTF))
3564 len = UTF ? Perl_utf8_length(aTHX_ (U8 *) PL_linestart, (U8 *) s) : (STRLEN) (s - PL_linestart);
3565 Perl_croak(aTHX_ "Unrecognized character \\x%02X in column %d", *s & 255, (int) len + 1);
3568 goto fake_eof; /* emulate EOF on ^D or ^Z */
3577 if (PL_lex_brackets) {
3578 yyerror((const char *)
3580 ? "Format not terminated"
3581 : "Missing right curly or square bracket"));
3583 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3584 "### Tokener got EOF\n");
3588 if (s++ < PL_bufend)
3589 goto retry; /* ignore stray nulls */
3592 if (!PL_in_eval && !PL_preambled) {
3593 PL_preambled = TRUE;
3598 sv_setpv(PL_linestr,incl_perldb());
3599 if (SvCUR(PL_linestr))
3600 sv_catpvs(PL_linestr,";");
3602 while(AvFILLp(PL_preambleav) >= 0) {
3603 SV *tmpsv = av_shift(PL_preambleav);
3604 sv_catsv(PL_linestr, tmpsv);
3605 sv_catpvs(PL_linestr, ";");
3608 sv_free((SV*)PL_preambleav);
3609 PL_preambleav = NULL;
3611 if (PL_minus_n || PL_minus_p) {
3612 sv_catpvs(PL_linestr, "LINE: while (<>) {");
3614 sv_catpvs(PL_linestr,"chomp;");
3617 if ((*PL_splitstr == '/' || *PL_splitstr == '\''
3618 || *PL_splitstr == '"')
3619 && strchr(PL_splitstr + 1, *PL_splitstr))
3620 Perl_sv_catpvf(aTHX_ PL_linestr, "our @F=split(%s);", PL_splitstr);
3622 /* "q\0${splitstr}\0" is legal perl. Yes, even NUL
3623 bytes can be used as quoting characters. :-) */
3624 const char *splits = PL_splitstr;
3625 sv_catpvs(PL_linestr, "our @F=split(q\0");
3628 if (*splits == '\\')
3629 sv_catpvn(PL_linestr, splits, 1);
3630 sv_catpvn(PL_linestr, splits, 1);
3631 } while (*splits++);
3632 /* This loop will embed the trailing NUL of
3633 PL_linestr as the last thing it does before
3635 sv_catpvs(PL_linestr, ");");
3639 sv_catpvs(PL_linestr,"our @F=split(' ');");
3643 sv_catpvs(PL_linestr,"use feature ':5.10';");
3644 sv_catpvs(PL_linestr, "\n");
3645 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
3646 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3647 PL_last_lop = PL_last_uni = NULL;
3648 if (PERLDB_LINE && PL_curstash != PL_debstash)
3649 update_debugger_info(PL_linestr, NULL, 0);
3653 bof = PL_rsfp ? TRUE : FALSE;
3654 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
3657 PL_realtokenstart = -1;
3660 if (PL_preprocess && !PL_in_eval)
3661 (void)PerlProc_pclose(PL_rsfp);
3662 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
3663 PerlIO_clearerr(PL_rsfp);
3665 (void)PerlIO_close(PL_rsfp);
3667 PL_doextract = FALSE;
3669 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
3674 sv_setpv(PL_linestr,
3677 ? ";}continue{print;}" : ";}"));
3678 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
3679 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3680 PL_last_lop = PL_last_uni = NULL;
3681 PL_minus_n = PL_minus_p = 0;
3684 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
3685 PL_last_lop = PL_last_uni = NULL;
3686 sv_setpvn(PL_linestr,"",0);
3687 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
3689 /* If it looks like the start of a BOM or raw UTF-16,
3690 * check if it in fact is. */
3696 #ifdef PERLIO_IS_STDIO
3697 # ifdef __GNU_LIBRARY__
3698 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
3699 # define FTELL_FOR_PIPE_IS_BROKEN
3703 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
3704 # define FTELL_FOR_PIPE_IS_BROKEN
3709 #ifdef FTELL_FOR_PIPE_IS_BROKEN
3710 /* This loses the possibility to detect the bof
3711 * situation on perl -P when the libc5 is being used.
3712 * Workaround? Maybe attach some extra state to PL_rsfp?
3715 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
3717 bof = PerlIO_tell(PL_rsfp) == (Off_t)SvCUR(PL_linestr);
3720 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3721 s = swallow_bom((U8*)s);
3725 /* Incest with pod. */
3728 sv_catsv(PL_thiswhite, PL_linestr);
3730 if (*s == '=' && strnEQ(s, "=cut", 4) && !isALPHA(s[4])) {
3731 sv_setpvn(PL_linestr, "", 0);
3732 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
3733 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3734 PL_last_lop = PL_last_uni = NULL;
3735 PL_doextract = FALSE;
3739 } while (PL_doextract);
3740 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
3741 if (PERLDB_LINE && PL_curstash != PL_debstash)
3742 update_debugger_info(PL_linestr, NULL, 0);
3743 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3744 PL_last_lop = PL_last_uni = NULL;
3745 if (CopLINE(PL_curcop) == 1) {
3746 while (s < PL_bufend && isSPACE(*s))
3748 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
3752 PL_thiswhite = newSVpvn(PL_linestart, s - PL_linestart);
3756 if (*s == '#' && *(s+1) == '!')
3758 #ifdef ALTERNATE_SHEBANG
3760 static char const as[] = ALTERNATE_SHEBANG;
3761 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
3762 d = s + (sizeof(as) - 1);
3764 #endif /* ALTERNATE_SHEBANG */
3773 while (*d && !isSPACE(*d))
3777 #ifdef ARG_ZERO_IS_SCRIPT
3778 if (ipathend > ipath) {
3780 * HP-UX (at least) sets argv[0] to the script name,
3781 * which makes $^X incorrect. And Digital UNIX and Linux,
3782 * at least, set argv[0] to the basename of the Perl
3783 * interpreter. So, having found "#!", we'll set it right.
3785 SV * const x = GvSV(gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL,
3787 assert(SvPOK(x) || SvGMAGICAL(x));
3788 if (sv_eq(x, CopFILESV(PL_curcop))) {
3789 sv_setpvn(x, ipath, ipathend - ipath);
3795 const char *bstart = SvPV_const(CopFILESV(PL_curcop),blen);
3796 const char * const lstart = SvPV_const(x,llen);
3798 bstart += blen - llen;
3799 if (strnEQ(bstart, lstart, llen) && bstart[-1] == '/') {
3800 sv_setpvn(x, ipath, ipathend - ipath);
3805 TAINT_NOT; /* $^X is always tainted, but that's OK */
3807 #endif /* ARG_ZERO_IS_SCRIPT */
3812 d = instr(s,"perl -");
3814 d = instr(s,"perl");
3816 /* avoid getting into infinite loops when shebang
3817 * line contains "Perl" rather than "perl" */
3819 for (d = ipathend-4; d >= ipath; --d) {
3820 if ((*d == 'p' || *d == 'P')
3821 && !ibcmp(d, "perl", 4))
3831 #ifdef ALTERNATE_SHEBANG
3833 * If the ALTERNATE_SHEBANG on this system starts with a
3834 * character that can be part of a Perl expression, then if
3835 * we see it but not "perl", we're probably looking at the
3836 * start of Perl code, not a request to hand off to some
3837 * other interpreter. Similarly, if "perl" is there, but
3838 * not in the first 'word' of the line, we assume the line
3839 * contains the start of the Perl program.
3841 if (d && *s != '#') {
3842 const char *c = ipath;
3843 while (*c && !strchr("; \t\r\n\f\v#", *c))
3846 d = NULL; /* "perl" not in first word; ignore */
3848 *s = '#'; /* Don't try to parse shebang line */
3850 #endif /* ALTERNATE_SHEBANG */
3851 #ifndef MACOS_TRADITIONAL
3856 !instr(s,"indir") &&
3857 instr(PL_origargv[0],"perl"))
3864 while (s < PL_bufend && isSPACE(*s))
3866 if (s < PL_bufend) {
3867 Newxz(newargv,PL_origargc+3,char*);
3869 while (s < PL_bufend && !isSPACE(*s))
3872 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
3875 newargv = PL_origargv;
3878 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
3880 Perl_croak(aTHX_ "Can't exec %s", ipath);
3884 while (*d && !isSPACE(*d))
3886 while (SPACE_OR_TAB(*d))
3890 const bool switches_done = PL_doswitches;
3891 const U32 oldpdb = PL_perldb;
3892 const bool oldn = PL_minus_n;
3893 const bool oldp = PL_minus_p;
3896 if (*d == 'M' || *d == 'm' || *d == 'C') {
3897 const char * const m = d;
3898 while (*d && !isSPACE(*d))
3900 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
3903 d = moreswitches(d);
3905 if (PL_doswitches && !switches_done) {
3906 int argc = PL_origargc;
3907 char **argv = PL_origargv;
3910 } while (argc && argv[0][0] == '-' && argv[0][1]);
3911 init_argv_symbols(argc,argv);
3913 if ((PERLDB_LINE && !oldpdb) ||
3914 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
3915 /* if we have already added "LINE: while (<>) {",
3916 we must not do it again */
3918 sv_setpvn(PL_linestr, "", 0);
3919 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
3920 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
3921 PL_last_lop = PL_last_uni = NULL;
3922 PL_preambled = FALSE;
3924 (void)gv_fetchfile(PL_origfilename);
3931 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
3933 PL_lex_state = LEX_FORMLINE;
3938 #ifdef PERL_STRICT_CR
3939 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
3941 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
3943 case ' ': case '\t': case '\f': case 013:
3944 #ifdef MACOS_TRADITIONAL
3948 PL_realtokenstart = -1;
3950 PL_thiswhite = newSVpvs("");
3951 sv_catpvn(PL_thiswhite, s, 1);
3958 PL_realtokenstart = -1;
3962 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
3963 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
3964 /* handle eval qq[#line 1 "foo"\n ...] */
3965 CopLINE_dec(PL_curcop);
3968 if (PL_madskills && !PL_lex_formbrack && !PL_in_eval) {
3970 if (!PL_in_eval || PL_rsfp)
3975 while (d < PL_bufend && *d != '\n')
3979 else if (d > PL_bufend) /* Found by Ilya: feed random input to Perl. */
3980 Perl_croak(aTHX_ "panic: input overflow");
3983 PL_thiswhite = newSVpvn(s, d - s);
3988 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
3990 PL_lex_state = LEX_FORMLINE;
3996 if (PL_madskills && CopLINE(PL_curcop) >= 1 && !PL_lex_formbrack) {
3997 if (CopLINE(PL_curcop) == 1 && s[0] == '#' && s[1] == '!') {
4000 TOKEN(PEG); /* make sure any #! line is accessible */
4005 /* if (PL_madskills && PL_lex_formbrack) { */
4007 while (d < PL_bufend && *d != '\n')
4011 else if (d > PL_bufend) /* Found by Ilya: feed random input to Perl. */
4012 Perl_croak(aTHX_ "panic: input overflow");
4013 if (PL_madskills && CopLINE(PL_curcop) >= 1) {
4015 PL_thiswhite = newSVpvs("");
4016 if (CopLINE(PL_curcop) == 1) {
4017 sv_setpvn(PL_thiswhite, "", 0);
4020 sv_catpvn(PL_thiswhite, s, d - s);
4034 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
4042 while (s < PL_bufend && SPACE_OR_TAB(*s))
4045 if (strnEQ(s,"=>",2)) {
4046 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
4047 DEBUG_T( { printbuf("### Saw unary minus before =>, forcing word %s\n", s); } );
4048 OPERATOR('-'); /* unary minus */
4050 PL_last_uni = PL_oldbufptr;
4052 case 'r': ftst = OP_FTEREAD; break;
4053 case 'w': ftst = OP_FTEWRITE; break;
4054 case 'x': ftst = OP_FTEEXEC; break;
4055 case 'o': ftst = OP_FTEOWNED; break;
4056 case 'R': ftst = OP_FTRREAD; break;
4057 case 'W': ftst = OP_FTRWRITE; break;
4058 case 'X': ftst = OP_FTREXEC; break;
4059 case 'O': ftst = OP_FTROWNED; break;
4060 case 'e': ftst = OP_FTIS; break;
4061 case 'z': ftst = OP_FTZERO; break;
4062 case 's': ftst = OP_FTSIZE; break;
4063 case 'f': ftst = OP_FTFILE; break;
4064 case 'd': ftst = OP_FTDIR; break;
4065 case 'l': ftst = OP_FTLINK; break;
4066 case 'p': ftst = OP_FTPIPE; break;
4067 case 'S': ftst = OP_FTSOCK; break;
4068 case 'u': ftst = OP_FTSUID; break;
4069 case 'g': ftst = OP_FTSGID; break;
4070 case 'k': ftst = OP_FTSVTX; break;
4071 case 'b': ftst = OP_FTBLK; break;
4072 case 'c': ftst = OP_FTCHR; break;
4073 case 't': ftst = OP_FTTTY; break;
4074 case 'T': ftst = OP_FTTEXT; break;
4075 case 'B': ftst = OP_FTBINARY; break;
4076 case 'M': case 'A': case 'C':
4077 gv_fetchpvs("\024", GV_ADD|GV_NOTQUAL, SVt_PV);
4079 case 'M': ftst = OP_FTMTIME; break;
4080 case 'A': ftst = OP_FTATIME; break;
4081 case 'C': ftst = OP_FTCTIME; break;
4089 PL_last_lop_op = (OPCODE)ftst;
4090 DEBUG_T( { PerlIO_printf(Perl_debug_log,
4091 "### Saw file test %c\n", (int)tmp);
4096 /* Assume it was a minus followed by a one-letter named
4097 * subroutine call (or a -bareword), then. */
4098 DEBUG_T( { PerlIO_printf(Perl_debug_log,
4099 "### '-%c' looked like a file test but was not\n",
4106 const char tmp = *s++;
4109 if (PL_expect == XOPERATOR)
4114 else if (*s == '>') {
4117 if (isIDFIRST_lazy_if(s,UTF)) {
4118 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
4126 if (PL_expect == XOPERATOR)
4129 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
4131 OPERATOR('-'); /* unary minus */
4137 const char tmp = *s++;
4140 if (PL_expect == XOPERATOR)
4145 if (PL_expect == XOPERATOR)
4148 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
4155 if (PL_expect != XOPERATOR) {
4156 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4157 PL_expect = XOPERATOR;
4158 force_ident(PL_tokenbuf, '*');
4171 if (PL_expect == XOPERATOR) {
4175 PL_tokenbuf[0] = '%';
4176 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
4177 sizeof PL_tokenbuf - 1, FALSE);
4178 if (!PL_tokenbuf[1]) {
4181 PL_pending_ident = '%';
4192 && (PL_expect == XOPERATOR || PL_expect == XTERMORDORDOR))
4199 const char tmp = *s++;
4205 goto just_a_word_zero_gv;
4208 switch (PL_expect) {
4214 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
4216 PL_bufptr = s; /* update in case we back off */
4222 PL_expect = XTERMBLOCK;
4225 stuffstart = s - SvPVX(PL_linestr) - 1;
4229 while (isIDFIRST_lazy_if(s,UTF)) {
4232 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4233 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len, 0))) {
4234 if (tmp < 0) tmp = -tmp;
4248 sv = newSVpvn(s, len);
4250 d = scan_str(d,TRUE,TRUE);
4252 /* MUST advance bufptr here to avoid bogus
4253 "at end of line" context messages from yyerror().
4255 PL_bufptr = s + len;
4256 yyerror("Unterminated attribute parameter in attribute list");
4260 return REPORT(0); /* EOF indicator */
4264 sv_catsv(sv, PL_lex_stuff);
4265 attrs = append_elem(OP_LIST, attrs,
4266 newSVOP(OP_CONST, 0, sv));
4267 SvREFCNT_dec(PL_lex_stuff);
4268 PL_lex_stuff = NULL;
4271 if (len == 6 && strnEQ(SvPVX(sv), "unique", len)) {
4273 if (PL_in_my == KEY_our) {
4275 GvUNIQUE_on(cGVOPx_gv(yylval.opval));
4277 /* skip to avoid loading attributes.pm */
4279 deprecate(":unique");
4282 Perl_croak(aTHX_ "The 'unique' attribute may only be applied to 'our' variables");
4285 /* NOTE: any CV attrs applied here need to be part of
4286 the CVf_BUILTIN_ATTRS define in cv.h! */
4287 else if (!PL_in_my && len == 6 && strnEQ(SvPVX(sv), "lvalue", len)) {
4289 CvLVALUE_on(PL_compcv);
4291 else if (!PL_in_my && len == 6 && strnEQ(SvPVX(sv), "locked", len)) {
4293 CvLOCKED_on(PL_compcv);
4295 else if (!PL_in_my && len == 6 && strnEQ(SvPVX(sv), "method", len)) {
4297 CvMETHOD_on(PL_compcv);
4299 /* After we've set the flags, it could be argued that
4300 we don't need to do the attributes.pm-based setting
4301 process, and shouldn't bother appending recognized
4302 flags. To experiment with that, uncomment the
4303 following "else". (Note that's already been
4304 uncommented. That keeps the above-applied built-in
4305 attributes from being intercepted (and possibly
4306 rejected) by a package's attribute routines, but is
4307 justified by the performance win for the common case
4308 of applying only built-in attributes.) */
4310 attrs = append_elem(OP_LIST, attrs,
4311 newSVOP(OP_CONST, 0,
4315 if (*s == ':' && s[1] != ':')
4318 break; /* require real whitespace or :'s */
4319 /* XXX losing whitespace on sequential attributes here */
4323 = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
4324 if (*s != ';' && *s != '}' && *s != tmp
4325 && (tmp != '=' || *s != ')')) {
4326 const char q = ((*s == '\'') ? '"' : '\'');
4327 /* If here for an expression, and parsed no attrs, back
4329 if (tmp == '=' && !attrs) {
4333 /* MUST advance bufptr here to avoid bogus "at end of line"
4334 context messages from yyerror().
4337 yyerror( (const char *)
4339 ? Perl_form(aTHX_ "Invalid separator character "
4340 "%c%c%c in attribute list", q, *s, q)
4341 : "Unterminated attribute list" ) );
4349 start_force(PL_curforce);
4350 NEXTVAL_NEXTTOKE.opval = attrs;
4351 CURMAD('_', PL_nextwhite);
4356 PL_thistoken = newSVpvn(SvPVX(PL_linestr) + stuffstart,
4357 (s - SvPVX(PL_linestr)) - stuffstart);
4365 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
4366 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
4374 const char tmp = *s++;
4379 const char tmp = *s++;
4387 if (PL_lex_brackets <= 0)
4388 yyerror("Unmatched right square bracket");
4391 if (PL_lex_state == LEX_INTERPNORMAL) {
4392 if (PL_lex_brackets == 0) {
4393 if (*s == '-' && s[1] == '>')
4394 PL_lex_state = LEX_INTERPENDMAYBE;
4395 else if (*s != '[' && *s != '{')
4396 PL_lex_state = LEX_INTERPEND;
4403 if (PL_lex_brackets > 100) {
4404 Renew(PL_lex_brackstack, PL_lex_brackets + 10, char);
4406 switch (PL_expect) {
4408 if (PL_lex_formbrack) {
4412 if (PL_oldoldbufptr == PL_last_lop)
4413 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
4415 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
4416 OPERATOR(HASHBRACK);
4418 while (s < PL_bufend && SPACE_OR_TAB(*s))
4421 PL_tokenbuf[0] = '\0';
4422 if (d < PL_bufend && *d == '-') {
4423 PL_tokenbuf[0] = '-';
4425 while (d < PL_bufend && SPACE_OR_TAB(*d))
4428 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
4429 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
4431 while (d < PL_bufend && SPACE_OR_TAB(*d))
4434 const char minus = (PL_tokenbuf[0] == '-');
4435 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
4443 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
4448 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
4453 if (PL_oldoldbufptr == PL_last_lop)
4454 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
4456 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
4459 if (PL_expect == XREF && PL_lex_state == LEX_INTERPNORMAL) {
4461 /* This hack is to get the ${} in the message. */
4463 yyerror("syntax error");
4466 OPERATOR(HASHBRACK);
4468 /* This hack serves to disambiguate a pair of curlies
4469 * as being a block or an anon hash. Normally, expectation
4470 * determines that, but in cases where we're not in a
4471 * position to expect anything in particular (like inside
4472 * eval"") we have to resolve the ambiguity. This code
4473 * covers the case where the first term in the curlies is a
4474 * quoted string. Most other cases need to be explicitly
4475 * disambiguated by prepending a "+" before the opening
4476 * curly in order to force resolution as an anon hash.
4478 * XXX should probably propagate the outer expectation
4479 * into eval"" to rely less on this hack, but that could
4480 * potentially break current behavior of eval"".
4484 if (*s == '\'' || *s == '"' || *s == '`') {
4485 /* common case: get past first string, handling escapes */
4486 for (t++; t < PL_bufend && *t != *s;)
4487 if (*t++ == '\\' && (*t == '\\' || *t == *s))
4491 else if (*s == 'q') {
4494 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
4497 /* skip q//-like construct */
4499 char open, close, term;
4502 while (t < PL_bufend && isSPACE(*t))
4504 /* check for q => */
4505 if (t+1 < PL_bufend && t[0] == '=' && t[1] == '>') {
4506 OPERATOR(HASHBRACK);
4510 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4514 for (t++; t < PL_bufend; t++) {
4515 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
4517 else if (*t == open)
4521 for (t++; t < PL_bufend; t++) {
4522 if (*t == '\\' && t+1 < PL_bufend)
4524 else if (*t == close && --brackets <= 0)
4526 else if (*t == open)
4533 /* skip plain q word */
4534 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
4537 else if (isALNUM_lazy_if(t,UTF)) {
4539 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
4542 while (t < PL_bufend && isSPACE(*t))
4544 /* if comma follows first term, call it an anon hash */
4545 /* XXX it could be a comma expression with loop modifiers */
4546 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
4547 || (*t == '=' && t[1] == '>')))
4548 OPERATOR(HASHBRACK);
4549 if (PL_expect == XREF)
4552 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
4558 yylval.ival = CopLINE(PL_curcop);
4559 if (isSPACE(*s) || *s == '#')
4560 PL_copline = NOLINE; /* invalidate current command line number */
4565 if (PL_lex_brackets <= 0)
4566 yyerror("Unmatched right curly bracket");
4568 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
4569 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
4570 PL_lex_formbrack = 0;
4571 if (PL_lex_state == LEX_INTERPNORMAL) {
4572 if (PL_lex_brackets == 0) {
4573 if (PL_expect & XFAKEBRACK) {
4574 PL_expect &= XENUMMASK;
4575 PL_lex_state = LEX_INTERPEND;
4580 PL_thiswhite = newSVpvs("");
4581 sv_catpvn(PL_thiswhite,"}",1);
4584 return yylex(); /* ignore fake brackets */
4586 if (*s == '-' && s[1] == '>')
4587 PL_lex_state = LEX_INTERPENDMAYBE;
4588 else if (*s != '[' && *s != '{')
4589 PL_lex_state = LEX_INTERPEND;
4592 if (PL_expect & XFAKEBRACK) {
4593 PL_expect &= XENUMMASK;
4595 return yylex(); /* ignore fake brackets */
4597 start_force(PL_curforce);
4599 curmad('X', newSVpvn(s-1,1));
4600 CURMAD('_', PL_thiswhite);
4605 PL_thistoken = newSVpvs("");
4613 if (PL_expect == XOPERATOR) {
4614 if (PL_bufptr == PL_linestart && ckWARN(WARN_SEMICOLON)
4615 && isIDFIRST_lazy_if(s,UTF))
4617 CopLINE_dec(PL_curcop);
4618 Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi);
4619 CopLINE_inc(PL_curcop);
4624 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4626 PL_expect = XOPERATOR;
4627 force_ident(PL_tokenbuf, '&');
4631 yylval.ival = (OPpENTERSUB_AMPER<<8);
4643 const char tmp = *s++;
4650 if (tmp && isSPACE(*s) && ckWARN(WARN_SYNTAX)
4651 && strchr("+-*/%.^&|<",tmp))
4652 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
4653 "Reversed %c= operator",(int)tmp);
4655 if (PL_expect == XSTATE && isALPHA(tmp) &&
4656 (s == PL_linestart+1 || s[-2] == '\n') )
4658 if (PL_in_eval && !PL_rsfp) {
4663 if (strnEQ(s,"=cut",4)) {
4679 PL_thiswhite = newSVpvs("");
4680 sv_catpvn(PL_thiswhite, PL_linestart,
4681 PL_bufend - PL_linestart);
4685 PL_doextract = TRUE;
4689 if (PL_lex_brackets < PL_lex_formbrack) {
4691 #ifdef PERL_STRICT_CR
4692 while (SPACE_OR_TAB(*t))
4694 while (SPACE_OR_TAB(*t) || *t == '\r')
4697 if (*t == '\n' || *t == '#') {
4708 const char tmp = *s++;
4710 /* was this !=~ where !~ was meant?
4711 * warn on m:!=~\s+([/?]|[msy]\W|tr\W): */
4713 if (*s == '~' && ckWARN(WARN_SYNTAX)) {
4714 const char *t = s+1;
4716 while (t < PL_bufend && isSPACE(*t))
4719 if (*t == '/' || *t == '?' ||
4720 ((*t == 'm' || *t == 's' || *t == 'y')
4721 && !isALNUM(t[1])) ||
4722 (*t == 't' && t[1] == 'r' && !isALNUM(t[2])))
4723 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
4724 "!=~ should be !~");
4734 if (PL_expect != XOPERATOR) {
4735 if (s[1] != '<' && !strchr(s,'>'))
4738 s = scan_heredoc(s);
4740 s = scan_inputsymbol(s);
4741 TERM(sublex_start());
4747 SHop(OP_LEFT_SHIFT);
4761 const char tmp = *s++;
4763 SHop(OP_RIGHT_SHIFT);
4764 else if (tmp == '=')
4773 if (PL_expect == XOPERATOR) {
4774 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
4776 deprecate_old(commaless_variable_list);
4777 return REPORT(','); /* grandfather non-comma-format format */
4781 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
4782 PL_tokenbuf[0] = '@';
4783 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
4784 sizeof PL_tokenbuf - 1, FALSE);
4785 if (PL_expect == XOPERATOR)
4786 no_op("Array length", s);
4787 if (!PL_tokenbuf[1])
4789 PL_expect = XOPERATOR;
4790 PL_pending_ident = '#';
4794 PL_tokenbuf[0] = '$';
4795 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
4796 sizeof PL_tokenbuf - 1, FALSE);
4797 if (PL_expect == XOPERATOR)
4799 if (!PL_tokenbuf[1]) {
4801 yyerror("Final $ should be \\$ or $name");
4805 /* This kludge not intended to be bulletproof. */
4806 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
4807 yylval.opval = newSVOP(OP_CONST, 0,
4808 newSViv(CopARYBASE_get(&PL_compiling)));
4809 yylval.opval->op_private = OPpCONST_ARYBASE;
4815 const char tmp = *s;
4816 if (PL_lex_state == LEX_NORMAL)
4819 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop)
4820 && intuit_more(s)) {
4822 PL_tokenbuf[0] = '@';
4823 if (ckWARN(WARN_SYNTAX)) {
4826 while (isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$')
4829 PL_bufptr = PEEKSPACE(PL_bufptr); /* XXX can realloc */
4830 while (t < PL_bufend && *t != ']')
4832 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
4833 "Multidimensional syntax %.*s not supported",
4834 (int)((t - PL_bufptr) + 1), PL_bufptr);
4838 else if (*s == '{') {
4840 PL_tokenbuf[0] = '%';
4841 if (strEQ(PL_tokenbuf+1, "SIG") && ckWARN(WARN_SYNTAX)
4842 && (t = strchr(s, '}')) && (t = strchr(t, '=')))
4844 char tmpbuf[sizeof PL_tokenbuf];
4847 } while (isSPACE(*t));
4848 if (isIDFIRST_lazy_if(t,UTF)) {
4850 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE,
4854 if (*t == ';' && get_cvn_flags(tmpbuf, len, 0))
4855 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
4856 "You need to quote \"%s\"",
4863 PL_expect = XOPERATOR;
4864 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
4865 const bool islop = (PL_last_lop == PL_oldoldbufptr);
4866 if (!islop || PL_last_lop_op == OP_GREPSTART)
4867 PL_expect = XOPERATOR;
4868 else if (strchr("$@\"'`q", *s))
4869 PL_expect = XTERM; /* e.g. print $fh "foo" */
4870 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
4871 PL_expect = XTERM; /* e.g. print $fh &sub */
4872 else if (isIDFIRST_lazy_if(s,UTF)) {
4873 char tmpbuf[sizeof PL_tokenbuf];
4875 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4876 if ((t2 = keyword(tmpbuf, len, 0))) {
4877 /* binary operators exclude handle interpretations */
4889 PL_expect = XTERM; /* e.g. print $fh length() */
4894 PL_expect = XTERM; /* e.g. print $fh subr() */
4897 else if (isDIGIT(*s))
4898 PL_expect = XTERM; /* e.g. print $fh 3 */
4899 else if (*s == '.' && isDIGIT(s[1]))
4900 PL_expect = XTERM; /* e.g. print $fh .3 */
4901 else if ((*s == '?' || *s == '-' || *s == '+')
4902 && !isSPACE(s[1]) && s[1] != '=')
4903 PL_expect = XTERM; /* e.g. print $fh -1 */
4904 else if (*s == '/' && !isSPACE(s[1]) && s[1] != '='
4906 PL_expect = XTERM; /* e.g. print $fh /.../
4907 XXX except DORDOR operator
4909 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2])
4911 PL_expect = XTERM; /* print $fh <<"EOF" */
4914 PL_pending_ident = '$';
4918 if (PL_expect == XOPERATOR)
4920 PL_tokenbuf[0] = '@';
4921 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
4922 if (!PL_tokenbuf[1]) {
4925 if (PL_lex_state == LEX_NORMAL)
4927 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
4929 PL_tokenbuf[0] = '%';
4931 /* Warn about @ where they meant $. */
4932 if (*s == '[' || *s == '{') {
4933 if (ckWARN(WARN_SYNTAX)) {
4934 const char *t = s + 1;
4935 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
4937 if (*t == '}' || *t == ']') {
4939 PL_bufptr = PEEKSPACE(PL_bufptr); /* XXX can realloc */
4940 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
4941 "Scalar value %.*s better written as $%.*s",
4942 (int)(t-PL_bufptr), PL_bufptr,
4943 (int)(t-PL_bufptr-1), PL_bufptr+1);
4948 PL_pending_ident = '@';
4951 case '/': /* may be division, defined-or, or pattern */
4952 if (PL_expect == XTERMORDORDOR && s[1] == '/') {
4956 case '?': /* may either be conditional or pattern */
4957 if(PL_expect == XOPERATOR) {
4965 /* A // operator. */
4975 /* Disable warning on "study /blah/" */
4976 if (PL_oldoldbufptr == PL_last_uni
4977 && (*PL_last_uni != 's' || s - PL_last_uni < 5
4978 || memNE(PL_last_uni, "study", 5)
4979 || isALNUM_lazy_if(PL_last_uni+5,UTF)
4982 s = scan_pat(s,OP_MATCH);
4983 TERM(sublex_start());
4987 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
4988 #ifdef PERL_STRICT_CR
4991 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
4993 && (s == PL_linestart || s[-1] == '\n') )
4995 PL_lex_formbrack = 0;
4999 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
5005 yylval.ival = OPf_SPECIAL;
5011 if (PL_expect != XOPERATOR)
5016 case '0': case '1': case '2': case '3': case '4':
5017 case '5': case '6': case '7': case '8': case '9':
5018 s = scan_num(s, &yylval);
5019 DEBUG_T( { printbuf("### Saw number in %s\n", s); } );
5020 if (PL_expect == XOPERATOR)
5025 s = scan_str(s,!!PL_madskills,FALSE);
5026 DEBUG_T( { printbuf("### Saw string before %s\n", s); } );
5027 if (PL_expect == XOPERATOR) {
5028 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
5030 deprecate_old(commaless_variable_list);
5031 return REPORT(','); /* grandfather non-comma-format format */
5038 yylval.ival = OP_CONST;
5039 TERM(sublex_start());
5042 s = scan_str(s,!!PL_madskills,FALSE);
5043 DEBUG_T( { printbuf("### Saw string before %s\n", s); } );
5044 if (PL_expect == XOPERATOR) {
5045 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
5047 deprecate_old(commaless_variable_list);
5048 return REPORT(','); /* grandfather non-comma-format format */
5055 yylval.ival = OP_CONST;
5056 /* FIXME. I think that this can be const if char *d is replaced by
5057 more localised variables. */
5058 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
5059 if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) {
5060 yylval.ival = OP_STRINGIFY;
5064 TERM(sublex_start());
5067 s = scan_str(s,!!PL_madskills,FALSE);
5068 DEBUG_T( { printbuf("### Saw backtick string before %s\n", s); } );
5069 if (PL_expect == XOPERATOR)
5070 no_op("Backticks",s);
5073 readpipe_override();
5074 TERM(sublex_start());
5078 if (PL_lex_inwhat && isDIGIT(*s) && ckWARN(WARN_SYNTAX))
5079 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),"Can't use \\%c to mean $%c in expression",
5081 if (PL_expect == XOPERATOR)
5082 no_op("Backslash",s);
5086 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
5087 char *start = s + 2;
5088 while (isDIGIT(*start) || *start == '_')
5090 if (*start == '.' && isDIGIT(start[1])) {
5091 s = scan_num(s, &yylval);
5094 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
5095 else if (!isALPHA(*start) && (PL_expect == XTERM
5096 || PL_expect == XREF || PL_expect == XSTATE
5097 || PL_expect == XTERMORDORDOR)) {
5098 /* XXX Use gv_fetchpvn rather than stomping on a const string */
5099 const char c = *start;
5102 gv = gv_fetchpv(s, 0, SVt_PVCV);
5105 s = scan_num(s, &yylval);
5112 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
5154 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
5156 /* Some keywords can be followed by any delimiter, including ':' */
5157 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
5158 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
5159 (PL_tokenbuf[0] == 'q' &&
5160 strchr("qwxr", PL_tokenbuf[1])))));
5162 /* x::* is just a word, unless x is "CORE" */
5163 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
5167 while (d < PL_bufend && isSPACE(*d))
5168 d++; /* no comments skipped here, or s### is misparsed */
5170 /* Is this a label? */
5171 if (!tmp && PL_expect == XSTATE
5172 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
5174 yylval.pval = CopLABEL_alloc(PL_tokenbuf);
5179 /* Check for keywords */
5180 tmp = keyword(PL_tokenbuf, len, 0);
5182 /* Is this a word before a => operator? */
5183 if (*d == '=' && d[1] == '>') {
5186 = (OP*)newSVOP(OP_CONST, 0,
5187 S_newSV_maybe_utf8(aTHX_ PL_tokenbuf, len));
5188 yylval.opval->op_private = OPpCONST_BARE;
5192 if (tmp < 0) { /* second-class keyword? */
5193 GV *ogv = NULL; /* override (winner) */
5194 GV *hgv = NULL; /* hidden (loser) */
5195 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
5197 if ((gv = gv_fetchpvn_flags(PL_tokenbuf, len, 0, SVt_PVCV)) &&
5200 if (GvIMPORTED_CV(gv))
5202 else if (! CvMETHOD(cv))
5206 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
5207 (gv = *gvp) && isGV_with_GP(gv) &&
5208 GvCVu(gv) && GvIMPORTED_CV(gv))
5215 tmp = 0; /* overridden by import or by GLOBAL */
5218 && -tmp==KEY_lock /* XXX generalizable kludge */
5221 tmp = 0; /* any sub overrides "weak" keyword */
5223 else { /* no override */
5225 if (tmp == KEY_dump && ckWARN(WARN_MISC)) {
5226 Perl_warner(aTHX_ packWARN(WARN_MISC),
5227 "dump() better written as CORE::dump()");
5231 if (hgv && tmp != KEY_x && tmp != KEY_CORE
5232 && ckWARN(WARN_AMBIGUOUS)) /* never ambiguous */
5233 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
5234 "Ambiguous call resolved as CORE::%s(), %s",
5235 GvENAME(hgv), "qualify as such or use &");
5242 default: /* not a keyword */
5243 /* Trade off - by using this evil construction we can pull the
5244 variable gv into the block labelled keylookup. If not, then
5245 we have to give it function scope so that the goto from the
5246 earlier ':' case doesn't bypass the initialisation. */
5248 just_a_word_zero_gv:
5256 const char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
5259 SV *nextPL_nextwhite = 0;
5263 /* Get the rest if it looks like a package qualifier */
5265 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
5267 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
5270 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
5271 *s == '\'' ? "'" : "::");
5276 if (PL_expect == XOPERATOR) {
5277 if (PL_bufptr == PL_linestart) {
5278 CopLINE_dec(PL_curcop);
5279 Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi);
5280 CopLINE_inc(PL_curcop);
5283 no_op("Bareword",s);
5286 /* Look for a subroutine with this name in current package,
5287 unless name is "Foo::", in which case Foo is a bearword
5288 (and a package name). */
5290 if (len > 2 && !PL_madskills &&
5291 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
5293 if (ckWARN(WARN_BAREWORD)
5294 && ! gv_fetchpvn_flags(PL_tokenbuf, len, 0, SVt_PVHV))
5295 Perl_warner(aTHX_ packWARN(WARN_BAREWORD),
5296 "Bareword \"%s\" refers to nonexistent package",
5299 PL_tokenbuf[len] = '\0';
5305 /* Mustn't actually add anything to a symbol table.
5306 But also don't want to "initialise" any placeholder
5307 constants that might already be there into full
5308 blown PVGVs with attached PVCV. */
5309 gv = gv_fetchpvn_flags(PL_tokenbuf, len,
5310 GV_NOADD_NOINIT, SVt_PVCV);
5315 /* if we saw a global override before, get the right name */
5318 sv = newSVpvs("CORE::GLOBAL::");
5319 sv_catpv(sv,PL_tokenbuf);
5322 /* If len is 0, newSVpv does strlen(), which is correct.
5323 If len is non-zero, then it will be the true length,
5324 and so the scalar will be created correctly. */
5325 sv = newSVpv(PL_tokenbuf,len);
5328 if (PL_madskills && !PL_thistoken) {
5329 char *start = SvPVX(PL_linestr) + PL_realtokenstart;
5330 PL_thistoken = newSVpv(start,s - start);
5331 PL_realtokenstart = s - SvPVX(PL_linestr);
5335 /* Presume this is going to be a bareword of some sort. */
5338 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
5339 yylval.opval->op_private = OPpCONST_BARE;
5340 /* UTF-8 package name? */
5341 if (UTF && !IN_BYTES &&
5342 is_utf8_string((U8*)SvPVX_const(sv), SvCUR(sv)))
5345 /* And if "Foo::", then that's what it certainly is. */
5350 /* Do the explicit type check so that we don't need to force
5351 the initialisation of the symbol table to have a real GV.
5352 Beware - gv may not really be a PVGV, cv may not really be
5353 a PVCV, (because of the space optimisations that gv_init
5354 understands) But they're true if for this symbol there is
5355 respectively a typeglob and a subroutine.
5357 cv = gv ? ((SvTYPE(gv) == SVt_PVGV)
5358 /* Real typeglob, so get the real subroutine: */
5360 /* A proxy for a subroutine in this package? */
5361 : SvOK(gv) ? (CV *) gv : NULL)
5364 /* See if it's the indirect object for a list operator. */
5366 if (PL_oldoldbufptr &&
5367 PL_oldoldbufptr < PL_bufptr &&
5368 (PL_oldoldbufptr == PL_last_lop
5369 || PL_oldoldbufptr == PL_last_uni) &&
5370 /* NO SKIPSPACE BEFORE HERE! */
5371 (PL_expect == XREF ||
5372 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
5374 bool immediate_paren = *s == '(';
5376 /* (Now we can afford to cross potential line boundary.) */
5377 s = SKIPSPACE2(s,nextPL_nextwhite);
5379 PL_nextwhite = nextPL_nextwhite; /* assume no & deception */
5382 /* Two barewords in a row may indicate method call. */
5384 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') &&
5385 (tmp = intuit_method(s, gv, cv)))
5388 /* If not a declared subroutine, it's an indirect object. */
5389 /* (But it's an indir obj regardless for sort.) */
5390 /* Also, if "_" follows a filetest operator, it's a bareword */
5393 ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
5395 (PL_last_lop_op != OP_MAPSTART &&
5396 PL_last_lop_op != OP_GREPSTART))))
5397 || (PL_tokenbuf[0] == '_' && PL_tokenbuf[1] == '\0'
5398 && ((PL_opargs[PL_last_lop_op] & OA_CLASS_MASK) == OA_FILESTATOP))
5401 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
5406 PL_expect = XOPERATOR;
5409 s = SKIPSPACE2(s,nextPL_nextwhite);
5410 PL_nextwhite = nextPL_nextwhite;
5415 /* Is this a word before a => operator? */
5416 if (*s == '=' && s[1] == '>' && !pkgname) {
5418 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
5419 if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len))
5420 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
5424 /* If followed by a paren, it's certainly a subroutine. */
5429 while (SPACE_OR_TAB(*d))
5431 if (*d == ')' && (sv = gv_const_sv(gv))) {
5438 PL_nextwhite = PL_thiswhite;
5441 start_force(PL_curforce);
5443 NEXTVAL_NEXTTOKE.opval = yylval.opval;
5444 PL_expect = XOPERATOR;
5447 PL_nextwhite = nextPL_nextwhite;
5448 curmad('X', PL_thistoken);
5449 PL_thistoken = newSVpvs("");
5457 /* If followed by var or block, call it a method (unless sub) */
5459 if ((*s == '$' || *s == '{') && (!gv || !cv)) {
5460 PL_last_lop = PL_oldbufptr;
5461 PL_last_lop_op = OP_METHOD;
5465 /* If followed by a bareword, see if it looks like indir obj. */
5468 && (isIDFIRST_lazy_if(s,UTF) || *s == '$')
5469 && (tmp = intuit_method(s, gv, cv)))
5472 /* Not a method, so call it a subroutine (if defined) */
5475 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
5476 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
5477 "Ambiguous use of -%s resolved as -&%s()",
5478 PL_tokenbuf, PL_tokenbuf);
5479 /* Check for a constant sub */
5480 if ((sv = gv_const_sv(gv))) {
5482 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
5483 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc_simple(sv);
5484 yylval.opval->op_private = 0;
5488 /* Resolve to GV now. */
5489 if (SvTYPE(gv) != SVt_PVGV) {
5490 gv = gv_fetchpv(PL_tokenbuf, 0, SVt_PVCV);
5491 assert (SvTYPE(gv) == SVt_PVGV);
5492 /* cv must have been some sort of placeholder, so
5493 now needs replacing with a real code reference. */
5497 op_free(yylval.opval);
5498 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
5499 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
5500 PL_last_lop = PL_oldbufptr;
5501 PL_last_lop_op = OP_ENTERSUB;
5502 /* Is there a prototype? */
5510 const char *proto = SvPV_const((SV*)cv, protolen);
5513 if ((*proto == '$' || *proto == '_') && proto[1] == '\0')
5515 while (*proto == ';')
5517 if (*proto == '&' && *s == '{') {
5518 sv_setpv(PL_subname,
5521 "__ANON__" : "__ANON__::__ANON__"));
5528 PL_nextwhite = PL_thiswhite;
5531 start_force(PL_curforce);
5532 NEXTVAL_NEXTTOKE.opval = yylval.opval;
5535 PL_nextwhite = nextPL_nextwhite;
5536 curmad('X', PL_thistoken);
5537 PL_thistoken = newSVpvs("");
5544 /* Guess harder when madskills require "best effort". */
5545 if (PL_madskills && (!gv || !GvCVu(gv))) {
5546 int probable_sub = 0;
5547 if (strchr("\"'`$@%0123456789!*+{[<", *s))
5549 else if (isALPHA(*s)) {
5553 d = scan_word(d, tmpbuf, sizeof tmpbuf, TRUE, &tmplen);
5554 if (!keyword(tmpbuf, tmplen, 0))
5557 while (d < PL_bufend && isSPACE(*d))
5559 if (*d == '=' && d[1] == '>')
5564 gv = gv_fetchpv(PL_tokenbuf, GV_ADD, SVt_PVCV);
5565 op_free(yylval.opval);
5566 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
5567 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
5568 PL_last_lop = PL_oldbufptr;
5569 PL_last_lop_op = OP_ENTERSUB;
5570 PL_nextwhite = PL_thiswhite;
5572 start_force(PL_curforce);
5573 NEXTVAL_NEXTTOKE.opval = yylval.opval;
5575 PL_nextwhite = nextPL_nextwhite;
5576 curmad('X', PL_thistoken);
5577 PL_thistoken = newSVpvs("");
5582 NEXTVAL_NEXTTOKE.opval = yylval.opval;
5589 /* Call it a bare word */
5591 if (PL_hints & HINT_STRICT_SUBS)
5592 yylval.opval->op_private |= OPpCONST_STRICT;
5595 if (lastchar != '-') {
5596 if (ckWARN(WARN_RESERVED)) {
5600 if (!*d && !gv_stashpv(PL_tokenbuf, 0))
5601 Perl_warner(aTHX_ packWARN(WARN_RESERVED), PL_warn_reserved,
5608 if ((lastchar == '*' || lastchar == '%' || lastchar == '&')
5609 && ckWARN_d(WARN_AMBIGUOUS)) {
5610 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
5611 "Operator or semicolon missing before %c%s",
5612 lastchar, PL_tokenbuf);
5613 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
5614 "Ambiguous use of %c resolved as operator %c",
5615 lastchar, lastchar);
5621 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
5622 newSVpv(CopFILE(PL_curcop),0));
5626 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
5627 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
5630 case KEY___PACKAGE__:
5631 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
5633 ? newSVhek(HvNAME_HEK(PL_curstash))
5640 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
5641 const char *pname = "main";
5642 if (PL_tokenbuf[2] == 'D')
5643 pname = HvNAME_get(PL_curstash ? PL_curstash : PL_defstash);
5644 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), GV_ADD,
5648 GvIOp(gv) = newIO();
5649 IoIFP(GvIOp(gv)) = PL_rsfp;
5650 #if defined(HAS_FCNTL) && defined(F_SETFD)
5652 const int fd = PerlIO_fileno(PL_rsfp);
5653 fcntl(fd,F_SETFD,fd >= 3);
5656 /* Mark this internal pseudo-handle as clean */
5657 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
5659 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
5660 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
5661 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
5663 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
5664 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
5665 /* if the script was opened in binmode, we need to revert
5666 * it to text mode for compatibility; but only iff it has CRs
5667 * XXX this is a questionable hack at best. */
5668 if (PL_bufend-PL_bufptr > 2
5669 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
5672 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
5673 loc = PerlIO_tell(PL_rsfp);
5674 (void)PerlIO_seek(PL_rsfp, 0L, 0);
5677 if (PerlLIO_setmode(PL_rsfp, O_TEXT) != -1) {
5679 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
5680 #endif /* NETWARE */
5681 #ifdef PERLIO_IS_STDIO /* really? */
5682 # if defined(__BORLANDC__)
5683 /* XXX see note in do_binmode() */
5684 ((FILE*)PL_rsfp)->flags &= ~_F_BIN;
5688 PerlIO_seek(PL_rsfp, loc, 0);
5692 #ifdef PERLIO_LAYERS
5695 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
5696 else if (PL_encoding) {
5703 XPUSHs(PL_encoding);
5705 call_method("name", G_SCALAR);
5709 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL,
5710 Perl_form(aTHX_ ":encoding(%"SVf")",
5719 if (PL_realtokenstart >= 0) {
5720 char *tstart = SvPVX(PL_linestr) + PL_realtokenstart;
5722 PL_endwhite = newSVpvs("");
5723 sv_catsv(PL_endwhite, PL_thiswhite);
5725 sv_catpvn(PL_endwhite, tstart, PL_bufend - tstart);
5726 PL_realtokenstart = -1;
5728 while ((s = filter_gets(PL_endwhite, PL_rsfp,
5729 SvCUR(PL_endwhite))) != Nullch) ;
5744 if (PL_expect == XSTATE) {
5751 if (*s == ':' && s[1] == ':') {
5754 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
5755 if (!(tmp = keyword(PL_tokenbuf, len, 0)))
5756 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
5759 else if (tmp == KEY_require || tmp == KEY_do)
5760 /* that's a way to remember we saw "CORE::" */
5773 LOP(OP_ACCEPT,XTERM);
5779 LOP(OP_ATAN2,XTERM);
5785 LOP(OP_BINMODE,XTERM);
5788 LOP(OP_BLESS,XTERM);
5797 /* When 'use switch' is in effect, continue has a dual
5798 life as a control operator. */
5800 if (!FEATURE_IS_ENABLED("switch"))
5803 /* We have to disambiguate the two senses of
5804 "continue". If the next token is a '{' then
5805 treat it as the start of a continue block;
5806 otherwise treat it as a control operator.
5818 (void)gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV);
5835 if (!PL_cryptseen) {
5836 PL_cryptseen = TRUE;
5840 LOP(OP_CRYPT,XTERM);
5843 LOP(OP_CHMOD,XTERM);
5846 LOP(OP_CHOWN,XTERM);
5849 LOP(OP_CONNECT,XTERM);
5868 s = force_word(s,WORD,TRUE,TRUE,FALSE);
5869 if (orig_keyword == KEY_do) {
5878 PL_hints |= HINT_BLOCK_SCOPE;
5888 gv_fetchpvs("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
5889 LOP(OP_DBMOPEN,XTERM);
5895 s = force_word(s,WORD,TRUE,FALSE,FALSE);
5902 yylval.ival = CopLINE(PL_curcop);
5918 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
5919 UNIBRACK(OP_ENTEREVAL);
5934 case KEY_endhostent:
5940 case KEY_endservent:
5943 case KEY_endprotoent:
5954 yylval.ival = CopLINE(PL_curcop);
5956 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
5959 int soff = s - SvPVX(PL_linestr); /* for skipspace realloc */
5962 if ((PL_bufend - p) >= 3 &&
5963 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
5965 else if ((PL_bufend - p) >= 4 &&
5966 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
5969 if (isIDFIRST_lazy_if(p,UTF)) {
5970 p = scan_ident(p, PL_bufend,
5971 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
5975 Perl_croak(aTHX_ "Missing $ on loop variable");
5977 s = SvPVX(PL_linestr) + soff;
5983 LOP(OP_FORMLINE,XTERM);
5989 LOP(OP_FCNTL,XTERM);
5995 LOP(OP_FLOCK,XTERM);
6004 LOP(OP_GREPSTART, XREF);
6007 s = force_word(s,WORD,TRUE,FALSE,FALSE);
6022 case KEY_getpriority:
6023 LOP(OP_GETPRIORITY,XTERM);
6025 case KEY_getprotobyname:
6028 case KEY_getprotobynumber:
6029 LOP(OP_GPBYNUMBER,XTERM);
6031 case KEY_getprotoent:
6043 case KEY_getpeername:
6044 UNI(OP_GETPEERNAME);
6046 case KEY_gethostbyname:
6049 case KEY_gethostbyaddr:
6050 LOP(OP_GHBYADDR,XTERM);
6052 case KEY_gethostent:
6055 case KEY_getnetbyname:
6058 case KEY_getnetbyaddr:
6059 LOP(OP_GNBYADDR,XTERM);
6064 case KEY_getservbyname:
6065 LOP(OP_GSBYNAME,XTERM);
6067 case KEY_getservbyport:
6068 LOP(OP_GSBYPORT,XTERM);
6070 case KEY_getservent:
6073 case KEY_getsockname:
6074 UNI(OP_GETSOCKNAME);
6076 case KEY_getsockopt:
6077 LOP(OP_GSOCKOPT,XTERM);
6092 yylval.ival = CopLINE(PL_curcop);
6103 yylval.ival = CopLINE(PL_curcop);
6107 LOP(OP_INDEX,XTERM);
6113 LOP(OP_IOCTL,XTERM);
6125 s = force_word(s,WORD,TRUE,FALSE,FALSE);
6157 LOP(OP_LISTEN,XTERM);
6166 s = scan_pat(s,OP_MATCH);
6167 TERM(sublex_start());
6170 LOP(OP_MAPSTART, XREF);
6173 LOP(OP_MKDIR,XTERM);
6176 LOP(OP_MSGCTL,XTERM);
6179 LOP(OP_MSGGET,XTERM);
6182 LOP(OP_MSGRCV,XTERM);
6185 LOP(OP_MSGSND,XTERM);
6190 PL_in_my = (U16)tmp;
6192 if (isIDFIRST_lazy_if(s,UTF)) {
6196 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
6197 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
6199 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
6200 if (!PL_in_my_stash) {
6203 my_snprintf(tmpbuf, sizeof(tmpbuf), "No such class %.1000s", PL_tokenbuf);
6207 if (PL_madskills) { /* just add type to declarator token */
6208 sv_catsv(PL_thistoken, PL_nextwhite);
6210 sv_catpvn(PL_thistoken, start, s - start);
6218 s = force_word(s,WORD,TRUE,FALSE,FALSE);
6225 s = tokenize_use(0, s);
6229 if (*s == '(' || (s = SKIPSPACE1(s), *s == '('))
6236 if (isIDFIRST_lazy_if(s,UTF)) {
6238 for (d = s; isALNUM_lazy_if(d,UTF);)
6240 for (t=d; isSPACE(*t);)
6242 if ( *t && strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE)
6244 && !(t[0] == '=' && t[1] == '>')
6246 int parms_len = (int)(d-s);
6247 Perl_warner(aTHX_ packWARN(WARN_PRECEDENCE),
6248 "Precedence problem: open %.*s should be open(%.*s)",
6249 parms_len, s, parms_len, s);
6255 yylval.ival = OP_OR;
6265 LOP(OP_OPEN_DIR,XTERM);
6268 checkcomma(s,PL_tokenbuf,"filehandle");
6272 checkcomma(s,PL_tokenbuf,"filehandle");
6291 s = force_word(s,WORD,FALSE,TRUE,FALSE);
6295 LOP(OP_PIPE_OP,XTERM);
6298 s = scan_str(s,!!PL_madskills,FALSE);
6301 yylval.ival = OP_CONST;
6302 TERM(sublex_start());
6308 s = scan_str(s,!!PL_madskills,FALSE);
6311 PL_expect = XOPERATOR;
6313 if (SvCUR(PL_lex_stuff)) {
6316 d = SvPV_force(PL_lex_stuff, len);
6318 for (; isSPACE(*d) && len; --len, ++d)
6323 if (!warned && ckWARN(WARN_QW)) {
6324 for (; !isSPACE(*d) && len; --len, ++d) {
6326 Perl_warner(aTHX_ packWARN(WARN_QW),
6327 "Possible attempt to separate words with commas");
6330 else if (*d == '#') {
6331 Perl_warner(aTHX_ packWARN(WARN_QW),
6332 "Possible attempt to put comments in qw() list");
6338 for (; !isSPACE(*d) && len; --len, ++d)
6341 sv = newSVpvn(b, d-b);
6342 if (DO_UTF8(PL_lex_stuff))
6344 words = append_elem(OP_LIST, words,
6345 newSVOP(OP_CONST, 0, tokeq(sv)));
6349 start_force(PL_curforce);
6350 NEXTVAL_NEXTTOKE.opval = words;
6355 SvREFCNT_dec(PL_lex_stuff);
6356 PL_lex_stuff = NULL;
6362 s = scan_str(s,!!PL_madskills,FALSE);
6365 yylval.ival = OP_STRINGIFY;
6366 if (SvIVX(PL_lex_stuff) == '\'')
6367 SvIV_set(PL_lex_stuff, 0); /* qq'$foo' should intepolate */
6368 TERM(sublex_start());
6371 s = scan_pat(s,OP_QR);
6372 TERM(sublex_start());
6375 s = scan_str(s,!!PL_madskills,FALSE);
6378 readpipe_override();
6379 TERM(sublex_start());
6387 s = force_version(s, FALSE);
6389 else if (*s != 'v' || !isDIGIT(s[1])
6390 || (s = force_version(s, TRUE), *s == 'v'))
6392 *PL_tokenbuf = '\0';
6393 s = force_word(s,WORD,TRUE,TRUE,FALSE);
6394 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
6395 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), GV_ADD);
6397 yyerror("<> should be quotes");
6399 if (orig_keyword == KEY_require) {
6407 PL_last_uni = PL_oldbufptr;
6408 PL_last_lop_op = OP_REQUIRE;
6410 return REPORT( (int)REQUIRE );
6416 s = force_word(s,WORD,TRUE,FALSE,FALSE);
6420 LOP(OP_RENAME,XTERM);
6429 LOP(OP_RINDEX,XTERM);
6439 UNIDOR(OP_READLINE);
6443 UNIDOR(OP_BACKTICK);
6452 LOP(OP_REVERSE,XTERM);
6455 UNIDOR(OP_READLINK);
6463 TERM(sublex_start());
6465 TOKEN(1); /* force error */
6468 checkcomma(s,PL_tokenbuf,"filehandle");
6478 LOP(OP_SELECT,XTERM);
6484 LOP(OP_SEMCTL,XTERM);
6487 LOP(OP_SEMGET,XTERM);
6490 LOP(OP_SEMOP,XTERM);
6496 LOP(OP_SETPGRP,XTERM);
6498 case KEY_setpriority:
6499 LOP(OP_SETPRIORITY,XTERM);
6501 case KEY_sethostent:
6507 case KEY_setservent:
6510 case KEY_setprotoent:
6520 LOP(OP_SEEKDIR,XTERM);
6522 case KEY_setsockopt:
6523 LOP(OP_SSOCKOPT,XTERM);
6529 LOP(OP_SHMCTL,XTERM);
6532 LOP(OP_SHMGET,XTERM);
6535 LOP(OP_SHMREAD,XTERM);
6538 LOP(OP_SHMWRITE,XTERM);
6541 LOP(OP_SHUTDOWN,XTERM);
6550 LOP(OP_SOCKET,XTERM);
6552 case KEY_socketpair:
6553 LOP(OP_SOCKPAIR,XTERM);
6556 checkcomma(s,PL_tokenbuf,"subroutine name");
6558 if (*s == ';' || *s == ')') /* probably a close */
6559 Perl_croak(aTHX_ "sort is now a reserved word");
6561 s = force_word(s,WORD,TRUE,TRUE,FALSE);
6565 LOP(OP_SPLIT,XTERM);
6568 LOP(OP_SPRINTF,XTERM);
6571 LOP(OP_SPLICE,XTERM);
6586 LOP(OP_SUBSTR,XTERM);
6592 char tmpbuf[sizeof PL_tokenbuf];
6593 SSize_t tboffset = 0;
6594 expectation attrful;
6595 bool have_name, have_proto;
6596 const int key = tmp;
6601 char *tstart = SvPVX(PL_linestr) + PL_realtokenstart;
6602 SV *subtoken = newSVpvn(tstart, s - tstart);
6606 s = SKIPSPACE2(s,tmpwhite);
6611 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
6612 (*s == ':' && s[1] == ':'))
6619 attrful = XATTRBLOCK;
6620 /* remember buffer pos'n for later force_word */
6621 tboffset = s - PL_oldbufptr;
6622 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
6625 nametoke = newSVpvn(s, d - s);
6627 if (memchr(tmpbuf, ':', len))
6628 sv_setpvn(PL_subname, tmpbuf, len);
6630 sv_setsv(PL_subname,PL_curstname);
6631 sv_catpvs(PL_subname,"::");
6632 sv_catpvn(PL_subname,tmpbuf,len);
6639 CURMAD('X', nametoke);
6640 CURMAD('_', tmpwhite);
6641 (void) force_word(PL_oldbufptr + tboffset, WORD,
6644 s = SKIPSPACE2(d,tmpwhite);
6651 Perl_croak(aTHX_ "Missing name in \"my sub\"");
6652 PL_expect = XTERMBLOCK;
6653 attrful = XATTRTERM;
6654 sv_setpvn(PL_subname,"?",1);
6658 if (key == KEY_format) {
6660 PL_lex_formbrack = PL_lex_brackets + 1;
6662 PL_thistoken = subtoken;
6666 (void) force_word(PL_oldbufptr + tboffset, WORD,
6672 /* Look for a prototype */
6675 bool bad_proto = FALSE;
6676 const bool warnsyntax = ckWARN(WARN_SYNTAX);
6678 s = scan_str(s,!!PL_madskills,FALSE);
6680 Perl_croak(aTHX_ "Prototype not terminated");
6681 /* strip spaces and check for bad characters */
6682 d = SvPVX(PL_lex_stuff);
6684 for (p = d; *p; ++p) {
6687 if (warnsyntax && !strchr("$@%*;[]&\\_", *p))
6693 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
6694 "Illegal character in prototype for %"SVf" : %s",
6695 SVfARG(PL_subname), d);
6696 SvCUR_set(PL_lex_stuff, tmp);
6701 CURMAD('q', PL_thisopen);
6702 CURMAD('_', tmpwhite);
6703 CURMAD('=', PL_thisstuff);
6704 CURMAD('Q', PL_thisclose);
6705 NEXTVAL_NEXTTOKE.opval =
6706 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
6707 PL_lex_stuff = Nullsv;
6710 s = SKIPSPACE2(s,tmpwhite);
6718 if (*s == ':' && s[1] != ':')
6719 PL_expect = attrful;
6720 else if (*s != '{' && key == KEY_sub) {
6722 Perl_croak(aTHX_ "Illegal declaration of anonymous subroutine");
6724 Perl_croak(aTHX_ "Illegal declaration of subroutine %"SVf, SVfARG(PL_subname));
6731 curmad('^', newSVpvs(""));
6732 CURMAD('_', tmpwhite);
6736 PL_thistoken = subtoken;
6739 NEXTVAL_NEXTTOKE.opval =
6740 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
6741 PL_lex_stuff = NULL;
6746 sv_setpv(PL_subname,
6748 (PL_curstash ? "__ANON__" : "__ANON__::__ANON__"));
6752 (void) force_word(PL_oldbufptr + tboffset, WORD,
6762 LOP(OP_SYSTEM,XREF);
6765 LOP(OP_SYMLINK,XTERM);
6768 LOP(OP_SYSCALL,XTERM);
6771 LOP(OP_SYSOPEN,XTERM);
6774 LOP(OP_SYSSEEK,XTERM);
6777 LOP(OP_SYSREAD,XTERM);
6780 LOP(OP_SYSWRITE,XTERM);
6784 TERM(sublex_start());
6805 LOP(OP_TRUNCATE,XTERM);
6817 yylval.ival = CopLINE(PL_curcop);
6821 yylval.ival = CopLINE(PL_curcop);
6825 LOP(OP_UNLINK,XTERM);
6831 LOP(OP_UNPACK,XTERM);
6834 LOP(OP_UTIME,XTERM);
6840 LOP(OP_UNSHIFT,XTERM);
6843 s = tokenize_use(1, s);
6853 yylval.ival = CopLINE(PL_curcop);
6857 yylval.ival = CopLINE(PL_curcop);
6861 PL_hints |= HINT_BLOCK_SCOPE;
6868 LOP(OP_WAITPID,XTERM);
6877 ctl_l[0] = toCTRL('L');
6879 gv_fetchpvn_flags(ctl_l, 1, GV_ADD|GV_NOTQUAL, SVt_PV);
6882 /* Make sure $^L is defined */
6883 gv_fetchpvs("\f", GV_ADD|GV_NOTQUAL, SVt_PV);
6888 if (PL_expect == XOPERATOR)
6894 yylval.ival = OP_XOR;
6899 TERM(sublex_start());
6904 #pragma segment Main
6908 S_pending_ident(pTHX)
6913 /* pit holds the identifier we read and pending_ident is reset */
6914 char pit = PL_pending_ident;
6915 PL_pending_ident = 0;
6917 /* PL_realtokenstart = realtokenend = PL_bufptr - SvPVX(PL_linestr); */
6918 DEBUG_T({ PerlIO_printf(Perl_debug_log,
6919 "### Pending identifier '%s'\n", PL_tokenbuf); });
6921 /* if we're in a my(), we can't allow dynamics here.
6922 $foo'bar has already been turned into $foo::bar, so
6923 just check for colons.
6925 if it's a legal name, the OP is a PADANY.
6928 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
6929 if (strchr(PL_tokenbuf,':'))
6930 yyerror(Perl_form(aTHX_ "No package name allowed for "
6931 "variable %s in \"our\"",
6933 tmp = allocmy(PL_tokenbuf);
6936 if (strchr(PL_tokenbuf,':'))
6937 yyerror(Perl_form(aTHX_ PL_no_myglob,
6938 PL_in_my == KEY_my ? "my" : "state", PL_tokenbuf));
6940 yylval.opval = newOP(OP_PADANY, 0);
6941 yylval.opval->op_targ = allocmy(PL_tokenbuf);
6947 build the ops for accesses to a my() variable.
6949 Deny my($a) or my($b) in a sort block, *if* $a or $b is
6950 then used in a comparison. This catches most, but not
6951 all cases. For instance, it catches
6952 sort { my($a); $a <=> $b }
6954 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
6955 (although why you'd do that is anyone's guess).
6958 if (!strchr(PL_tokenbuf,':')) {
6960 tmp = pad_findmy(PL_tokenbuf);
6961 if (tmp != NOT_IN_PAD) {
6962 /* might be an "our" variable" */
6963 if (PAD_COMPNAME_FLAGS_isOUR(tmp)) {
6964 /* build ops for a bareword */
6965 HV * const stash = PAD_COMPNAME_OURSTASH(tmp);
6966 HEK * const stashname = HvNAME_HEK(stash);
6967 SV * const sym = newSVhek(stashname);
6968 sv_catpvs(sym, "::");
6969 sv_catpv(sym, PL_tokenbuf+1);
6970 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
6971 yylval.opval->op_private = OPpCONST_ENTERED;
6974 ? (GV_ADDMULTI | GV_ADDINEVAL)
6977 ((PL_tokenbuf[0] == '$') ? SVt_PV
6978 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
6983 /* if it's a sort block and they're naming $a or $b */
6984 if (PL_last_lop_op == OP_SORT &&
6985 PL_tokenbuf[0] == '$' &&
6986 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
6989 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
6990 d < PL_bufend && *d != '\n';
6993 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
6994 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
7000 yylval.opval = newOP(OP_PADANY, 0);
7001 yylval.opval->op_targ = tmp;
7007 Whine if they've said @foo in a doublequoted string,
7008 and @foo isn't a variable we can find in the symbol
7011 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
7012 GV *gv = gv_fetchpv(PL_tokenbuf+1, 0, SVt_PVAV);
7013 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
7014 && ckWARN(WARN_AMBIGUOUS)
7015 /* DO NOT warn for @- and @+ */
7016 && !( PL_tokenbuf[2] == '\0' &&
7017 ( PL_tokenbuf[1] == '-' || PL_tokenbuf[1] == '+' ))
7020 /* Downgraded from fatal to warning 20000522 mjd */
7021 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
7022 "Possible unintended interpolation of %s in string",
7027 /* build ops for a bareword */
7028 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
7029 yylval.opval->op_private = OPpCONST_ENTERED;
7032 /* If the identifier refers to a stash, don't autovivify it.
7033 * Change 24660 had the side effect of causing symbol table
7034 * hashes to always be defined, even if they were freshly
7035 * created and the only reference in the entire program was
7036 * the single statement with the defined %foo::bar:: test.
7037 * It appears that all code in the wild doing this actually
7038 * wants to know whether sub-packages have been loaded, so
7039 * by avoiding auto-vivifying symbol tables, we ensure that
7040 * defined %foo::bar:: continues to be false, and the existing
7041 * tests still give the expected answers, even though what
7042 * they're actually testing has now changed subtly.
7044 (*PL_tokenbuf == '%' && *(d = PL_tokenbuf + strlen(PL_tokenbuf) - 1) == ':' && d[-1] == ':'
7046 : PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : GV_ADD),
7047 ((PL_tokenbuf[0] == '$') ? SVt_PV
7048 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
7054 * The following code was generated by perl_keyword.pl.
7058 Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords)
7063 case 1: /* 5 tokens of length 1 */
7095 case 2: /* 18 tokens of length 2 */
7241 case 3: /* 29 tokens of length 3 */
7245 if (name[1] == 'N' &&
7308 if (name[1] == 'i' &&
7340 if (name[1] == 'o' &&
7349 if (name[1] == 'e' &&
7358 if (name[1] == 'n' &&
7367 if (name[1] == 'o' &&
7376 if (name[1] == 'a' &&
7385 if (name[1] == 'o' &&
7447 if (name[1] == 'e' &&
7461 return (all_keywords || FEATURE_IS_ENABLED("say") ? KEY_say : 0);
7487 if (name[1] == 'i' &&
7496 if (name[1] == 's' &&
7505 if (name[1] == 'e' &&
7514 if (name[1] == 'o' &&
7526 case 4: /* 41 tokens of length 4 */
7530 if (name[1] == 'O' &&
7540 if (name[1] == 'N' &&
7550 if (name[1] == 'i' &&
7560 if (name[1] == 'h' &&
7570 if (name[1] == 'u' &&
7583 if (name[2] == 'c' &&
7592 if (name[2] == 's' &&
7601 if (name[2] == 'a' &&
7637 if (name[1] == 'o' &&
7650 if (name[2] == 't' &&
7659 if (name[2] == 'o' &&
7668 if (name[2] == 't' &&
7677 if (name[2] == 'e' &&
7690 if (name[1] == 'o' &&
7703 if (name[2] == 'y' &&
7712 if (name[2] == 'l' &&
7728 if (name[2] == 's' &&
7737 if (name[2] == 'n' &&
7746 if (name[2] == 'c' &&
7759 if (name[1] == 'e' &&
7769 if (name[1] == 'p' &&
7782 if (name[2] == 'c' &&
7791 if (name[2] == 'p' &&
7800 if (name[2] == 's' &&
7816 if (name[2] == 'n' &&
7886 if (name[2] == 'r' &&
7895 if (name[2] == 'r' &&
7904 if (name[2] == 'a' &&
7920 if (name[2] == 'l' &&
7982 if (name[2] == 'e' &&
7985 return (all_keywords || FEATURE_IS_ENABLED("switch") ? KEY_when : 0);
7998 case 5: /* 39 tokens of length 5 */
8002 if (name[1] == 'E' &&
8013 if (name[1] == 'H' &&
8027 if (name[2] == 'a' &&
8037 if (name[2] == 'a' &&
8054 if (name[2] == 'e' &&
8064 if (name[2] == 'e' &&
8068 return (all_keywords || FEATURE_IS_ENABLED("switch") ? -KEY_break : 0);
8084 if (name[3] == 'i' &&
8093 if (name[3] == 'o' &&
8129 if (name[2] == 'o' &&
8139 if (name[2] == 'y' &&
8153 if (name[1] == 'l' &&
8167 if (name[2] == 'n' &&
8177 if (name[2] == 'o' &&
8191 if (name[1] == 'i' &&
8196 return (all_keywords || FEATURE_IS_ENABLED("switch") ? KEY_given : 0);
8205 if (name[2] == 'd' &&
8215 if (name[2] == 'c' &&
8232 if (name[2] == 'c' &&
8242 if (name[2] == 't' &&
8256 if (name[1] == 'k' &&
8267 if (name[1] == 'r' &&
8281 if (name[2] == 's' &&
8291 if (name[2] == 'd' &&
8308 if (name[2] == 'm' &&
8318 if (name[2] == 'i' &&
8328 if (name[2] == 'e' &&
8338 if (name[2] == 'l' &&
8348 if (name[2] == 'a' &&
8361 if (name[3] == 't' &&
8364 return (all_keywords || FEATURE_IS_ENABLED("state") ? KEY_state : 0);
8370 if (name[3] == 'd' &&
8387 if (name[1] == 'i' &&
8401 if (name[2] == 'a' &&
8414 if (name[3] == 'e' &&
8449 if (name[2] == 'i' &&
8466 if (name[2] == 'i' &&
8476 if (name[2] == 'i' &&
8493 case 6: /* 33 tokens of length 6 */
8497 if (name[1] == 'c' &&
8512 if (name[2] == 'l' &&
8523 if (name[2] == 'r' &&
8538 if (name[1] == 'e' &&
8553 if (name[2] == 's' &&
8558 if(ckWARN_d(WARN_SYNTAX))
8559 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "elseif should be elsif");
8565 if (name[2] == 'i' &&
8583 if (name[2] == 'l' &&
8594 if (name[2] == 'r' &&
8609 if (name[1] == 'm' &&
8624 if (name[2] == 'n' &&
8635 if (name[2] == 's' &&
8650 if (name[1] == 's' &&
8656 if (name[4] == 't' &&
8665 if (name[4] == 'e' &&
8674 if (name[4] == 'c' &&
8683 if (name[4] == 'n' &&
8699 if (name[1] == 'r' &&
8717 if (name[3] == 'a' &&
8727 if (name[3] == 'u' &&
8741 if (name[2] == 'n' &&
8759 if (name[2] == 'a' &&
8773 if (name[3] == 'e' &&
8786 if (name[4] == 't' &&
8795 if (name[4] == 'e' &&
8817 if (name[4] == 't' &&
8826 if (name[4] == 'e' &&
8842 if (name[2] == 'c' &&
8853 if (name[2] == 'l' &&
8864 if (name[2] == 'b' &&
8875 if (name[2] == 's' &&
8898 if (name[4] == 's' &&
8907 if (name[4] == 'n' &&
8920 if (name[3] == 'a' &&
8937 if (name[1] == 'a' &&
8952 case 7: /* 29 tokens of length 7 */
8956 if (name[1] == 'E' &&
8969 if (name[1] == '_' &&
8982 if (name[1] == 'i' &&
8989 return -KEY_binmode;
8995 if (name[1] == 'o' &&
9002 return -KEY_connect;
9011 if (name[2] == 'm' &&
9017 return -KEY_dbmopen;
9028 if (name[4] == 'u' &&
9032 return (all_keywords || FEATURE_IS_ENABLED("switch") ? KEY_default : 0);
9038 if (name[4] == 'n' &&
9059 if (name[1] == 'o' &&
9072 if (name[1] == 'e' &&
9079 if (name[5] == 'r' &&
9082 return -KEY_getpgrp;
9088 if (name[5] == 'i' &&
9091 return -KEY_getppid;
9104 if (name[1] == 'c' &&
9111 return -KEY_lcfirst;
9117 if (name[1] == 'p' &&
9124 return -KEY_opendir;
9130 if (name[1] == 'a' &&
9148 if (name[3] == 'd' &&
9153 return -KEY_readdir;
9159 if (name[3] == 'u' &&
9170 if (name[3] == 'e' &&
9175 return -KEY_reverse;
9194 if (name[3] == 'k' &&
9199 return -KEY_seekdir;
9205 if (name[3] == 'p' &&
9210 return -KEY_setpgrp;
9220 if (name[2] == 'm' &&
9226 return -KEY_shmread;
9232 if (name[2] == 'r' &&
9238 return -KEY_sprintf;
9247 if (name[3] == 'l' &&
9252 return -KEY_symlink;
9261 if (name[4] == 'a' &&
9265 return -KEY_syscall;
9271 if (name[4] == 'p' &&
9275 return -KEY_sysopen;
9281 if (name[4] == 'e' &&
9285 return -KEY_sysread;
9291 if (name[4] == 'e' &&
9295 return -KEY_sysseek;
9313 if (name[1] == 'e' &&
9320 return -KEY_telldir;
9329 if (name[2] == 'f' &&
9335 return -KEY_ucfirst;
9341 if (name[2] == 's' &&
9347 return -KEY_unshift;
9357 if (name[1] == 'a' &&
9364 return -KEY_waitpid;
9373 case 8: /* 26 tokens of length 8 */
9377 if (name[1] == 'U' &&
9385 return KEY_AUTOLOAD;
9396 if (name[3] == 'A' &&
9402 return KEY___DATA__;
9408 if (name[3] == 'I' &&
9414 return -KEY___FILE__;
9420 if (name[3] == 'I' &&
9426 return -KEY___LINE__;
9442 if (name[2] == 'o' &&
9449 return -KEY_closedir;
9455 if (name[2] == 'n' &&
9462 return -KEY_continue;
9472 if (name[1] == 'b' &&
9480 return -KEY_dbmclose;
9486 if (name[1] == 'n' &&
9492 if (name[4] == 'r' &&
9497 return -KEY_endgrent;
9503 if (name[4] == 'w' &&
9508 return -KEY_endpwent;
9521 if (name[1] == 'o' &&
9529 return -KEY_formline;
9535 if (name[1] == 'e' &&
9546 if (name[6] == 'n' &&
9549 return -KEY_getgrent;
9555 if (name[6] == 'i' &&
9558 return -KEY_getgrgid;
9564 if (name[6] == 'a' &&
9567 return -KEY_getgrnam;
9580 if (name[4] == 'o' &&
9585 return -KEY_getlogin;
9596 if (name[6] == 'n' &&
9599 return -KEY_getpwent;
9605 if (name[6] == 'a' &&
9608 return -KEY_getpwnam;
9614 if (name[6] == 'i' &&
9617 return -KEY_getpwuid;
9637 if (name[1] == 'e' &&
9644 if (name[5] == 'i' &&
9651 return -KEY_readline;
9656 return -KEY_readlink;
9667 if (name[5] == 'i' &&
9671 return -KEY_readpipe;
9692 if (name[4] == 'r' &&
9697 return -KEY_setgrent;
9703 if (name[4] == 'w' &&
9708 return -KEY_setpwent;
9724 if (name[3] == 'w' &&
9730 return -KEY_shmwrite;
9736 if (name[3] == 't' &&
9742 return -KEY_shutdown;
9752 if (name[2] == 's' &&
9759 return -KEY_syswrite;
9769 if (name[1] == 'r' &&
9777 return -KEY_truncate;
9786 case 9: /* 9 tokens of length 9 */
9790 if (name[1] == 'N' &&
9799 return KEY_UNITCHECK;
9805 if (name[1] == 'n' &&
9814 return -KEY_endnetent;
9820 if (name[1] == 'e' &&
9829 return -KEY_getnetent;
9835 if (name[1] == 'o' &&
9844 return -KEY_localtime;
9850 if (name[1] == 'r' &&
9859 return KEY_prototype;
9865 if (name[1] == 'u' &&
9874 return -KEY_quotemeta;
9880 if (name[1] == 'e' &&
9889 return -KEY_rewinddir;
9895 if (name[1] == 'e' &&
9904 return -KEY_setnetent;
9910 if (name[1] == 'a' &&
9919 return -KEY_wantarray;
9928 case 10: /* 9 tokens of length 10 */
9932 if (name[1] == 'n' &&
9938 if (name[4] == 'o' &&
9945 return -KEY_endhostent;
9951 if (name[4] == 'e' &&
9958 return -KEY_endservent;
9971 if (name[1] == 'e' &&
9977 if (name[4] == 'o' &&
9984 return -KEY_gethostent;
9993 if (name[5] == 'r' &&
9999 return -KEY_getservent;
10005 if (name[5] == 'c' &&
10011 return -KEY_getsockopt;
10031 if (name[2] == 't')
10036 if (name[4] == 'o' &&
10043 return -KEY_sethostent;
10052 if (name[5] == 'r' &&
10058 return -KEY_setservent;
10064 if (name[5] == 'c' &&
10070 return -KEY_setsockopt;
10087 if (name[2] == 'c' &&
10096 return -KEY_socketpair;
10109 case 11: /* 8 tokens of length 11 */
10113 if (name[1] == '_' &&
10123 { /* __PACKAGE__ */
10124 return -KEY___PACKAGE__;
10130 if (name[1] == 'n' &&
10140 { /* endprotoent */
10141 return -KEY_endprotoent;
10147 if (name[1] == 'e' &&
10156 if (name[5] == 'e' &&
10162 { /* getpeername */
10163 return -KEY_getpeername;
10172 if (name[6] == 'o' &&
10177 { /* getpriority */
10178 return -KEY_getpriority;
10184 if (name[6] == 't' &&
10189 { /* getprotoent */
10190 return -KEY_getprotoent;
10204 if (name[4] == 'o' &&
10211 { /* getsockname */
10212 return -KEY_getsockname;
10225 if (name[1] == 'e' &&
10233 if (name[6] == 'o' &&
10238 { /* setpriority */
10239 return -KEY_setpriority;
10245 if (name[6] == 't' &&
10250 { /* setprotoent */
10251 return -KEY_setprotoent;
10267 case 12: /* 2 tokens of length 12 */
10268 if (name[0] == 'g' &&
10280 if (name[9] == 'd' &&
10283 { /* getnetbyaddr */
10284 return -KEY_getnetbyaddr;
10290 if (name[9] == 'a' &&
10293 { /* getnetbyname */
10294 return -KEY_getnetbyname;
10306 case 13: /* 4 tokens of length 13 */
10307 if (name[0] == 'g' &&
10314 if (name[4] == 'o' &&
10323 if (name[10] == 'd' &&
10326 { /* gethostbyaddr */
10327 return -KEY_gethostbyaddr;
10333 if (name[10] == 'a' &&
10336 { /* gethostbyname */
10337 return -KEY_gethostbyname;
10350 if (name[4] == 'e' &&
10359 if (name[10] == 'a' &&
10362 { /* getservbyname */
10363 return -KEY_getservbyname;
10369 if (name[10] == 'o' &&
10372 { /* getservbyport */
10373 return -KEY_getservbyport;
10392 case 14: /* 1 tokens of length 14 */
10393 if (name[0] == 'g' &&
10407 { /* getprotobyname */
10408 return -KEY_getprotobyname;
10413 case 16: /* 1 tokens of length 16 */
10414 if (name[0] == 'g' &&
10430 { /* getprotobynumber */
10431 return -KEY_getprotobynumber;
10445 S_checkcomma(pTHX_ const char *s, const char *name, const char *what)
10449 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
10450 if (ckWARN(WARN_SYNTAX)) {
10453 for (w = s+2; *w && level; w++) {
10456 else if (*w == ')')
10459 while (isSPACE(*w))
10461 /* the list of chars below is for end of statements or
10462 * block / parens, boolean operators (&&, ||, //) and branch
10463 * constructs (or, and, if, until, unless, while, err, for).
10464 * Not a very solid hack... */
10465 if (!*w || !strchr(";&/|})]oaiuwef!=", *w))
10466 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
10467 "%s (...) interpreted as function",name);
10470 while (s < PL_bufend && isSPACE(*s))
10474 while (s < PL_bufend && isSPACE(*s))
10476 if (isIDFIRST_lazy_if(s,UTF)) {
10477 const char * const w = s++;
10478 while (isALNUM_lazy_if(s,UTF))
10480 while (s < PL_bufend && isSPACE(*s))
10484 if (keyword(w, s - w, 0))
10487 gv = gv_fetchpvn_flags(w, s - w, 0, SVt_PVCV);
10488 if (gv && GvCVu(gv))
10490 Perl_croak(aTHX_ "No comma allowed after %s", what);
10495 /* Either returns sv, or mortalizes sv and returns a new SV*.
10496 Best used as sv=new_constant(..., sv, ...).
10497 If s, pv are NULL, calls subroutine with one argument,
10498 and type is used with error messages only. */
10501 S_new_constant(pTHX_ const char *s, STRLEN len, const char *key, SV *sv, SV *pv,
10505 HV * const table = GvHV(PL_hintgv); /* ^H */
10509 const char *why1 = "", *why2 = "", *why3 = "";
10511 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
10514 why2 = (const char *)
10515 (strEQ(key,"charnames")
10516 ? "(possibly a missing \"use charnames ...\")"
10518 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
10519 (type ? type: "undef"), why2);
10521 /* This is convoluted and evil ("goto considered harmful")
10522 * but I do not understand the intricacies of all the different
10523 * failure modes of %^H in here. The goal here is to make
10524 * the most probable error message user-friendly. --jhi */
10529 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
10530 (type ? type: "undef"), why1, why2, why3);
10532 yyerror(SvPVX_const(msg));
10536 cvp = hv_fetch(table, key, strlen(key), FALSE);
10537 if (!cvp || !SvOK(*cvp)) {
10540 why3 = "} is not defined";
10543 sv_2mortal(sv); /* Parent created it permanently */
10546 pv = sv_2mortal(newSVpvn(s, len));
10548 typesv = sv_2mortal(newSVpv(type, 0));
10550 typesv = &PL_sv_undef;
10552 PUSHSTACKi(PERLSI_OVERLOAD);
10564 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
10568 /* Check the eval first */
10569 if (!PL_in_eval && SvTRUE(ERRSV)) {
10570 sv_catpvs(ERRSV, "Propagated");
10571 yyerror(SvPV_nolen_const(ERRSV)); /* Duplicates the message inside eval */
10573 res = SvREFCNT_inc_simple(sv);
10577 SvREFCNT_inc_simple_void(res);
10586 why1 = "Call to &{$^H{";
10588 why3 = "}} did not return a defined value";
10596 /* Returns a NUL terminated string, with the length of the string written to
10600 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
10603 register char *d = dest;
10604 register char * const e = d + destlen - 3; /* two-character token, ending NUL */
10607 Perl_croak(aTHX_ ident_too_long);
10608 if (isALNUM(*s)) /* UTF handled below */
10610 else if (allow_package && (*s == '\'') && isIDFIRST_lazy_if(s+1,UTF)) {
10615 else if (allow_package && (s[0] == ':') && (s[1] == ':') && (s[2] != '$')) {
10619 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
10620 char *t = s + UTF8SKIP(s);
10622 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
10626 Perl_croak(aTHX_ ident_too_long);
10627 Copy(s, d, len, char);
10640 S_scan_ident(pTHX_ register char *s, register const char *send, char *dest, STRLEN destlen, I32 ck_uni)
10643 char *bracket = NULL;
10645 register char *d = dest;
10646 register char * const e = d + destlen + 3; /* two-character token, ending NUL */
10651 while (isDIGIT(*s)) {
10653 Perl_croak(aTHX_ ident_too_long);
10660 Perl_croak(aTHX_ ident_too_long);
10661 if (isALNUM(*s)) /* UTF handled below */
10663 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
10668 else if (*s == ':' && s[1] == ':') {
10672 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
10673 char *t = s + UTF8SKIP(s);
10674 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
10676 if (d + (t - s) > e)
10677 Perl_croak(aTHX_ ident_too_long);
10678 Copy(s, d, t - s, char);
10689 if (PL_lex_state != LEX_NORMAL)
10690 PL_lex_state = LEX_INTERPENDMAYBE;
10693 if (*s == '$' && s[1] &&
10694 (isALNUM_lazy_if(s+1,UTF) || s[1] == '$' || s[1] == '{' || strnEQ(s+1,"::",2)) )
10707 if (*d == '^' && *s && isCONTROLVAR(*s)) {
10712 if (isSPACE(s[-1])) {
10714 const char ch = *s++;
10715 if (!SPACE_OR_TAB(ch)) {
10721 if (isIDFIRST_lazy_if(d,UTF)) {
10725 while ((end < send && isALNUM_lazy_if(end,UTF)) || *end == ':') {
10726 end += UTF8SKIP(end);
10727 while (end < send && UTF8_IS_CONTINUED(*end) && is_utf8_mark((U8*)end))
10728 end += UTF8SKIP(end);
10730 Copy(s, d, end - s, char);
10735 while ((isALNUM(*s) || *s == ':') && d < e)
10738 Perl_croak(aTHX_ ident_too_long);
10741 while (s < send && SPACE_OR_TAB(*s))
10743 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
10744 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest, 0)) {
10745 const char * const brack =
10747 ((*s == '[') ? "[...]" : "{...}");
10748 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
10749 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
10750 funny, dest, brack, funny, dest, brack);
10753 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
10757 /* Handle extended ${^Foo} variables
10758 * 1999-02-27 mjd-perl-patch@plover.com */
10759 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
10763 while (isALNUM(*s) && d < e) {
10767 Perl_croak(aTHX_ ident_too_long);
10772 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets) {
10773 PL_lex_state = LEX_INTERPEND;
10776 if (PL_lex_state == LEX_NORMAL) {
10777 if (ckWARN(WARN_AMBIGUOUS) &&
10778 (keyword(dest, d - dest, 0)
10779 || get_cvn_flags(dest, d - dest, 0)))
10783 Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
10784 "Ambiguous use of %c{%s} resolved to %c%s",
10785 funny, dest, funny, dest);
10790 s = bracket; /* let the parser handle it */
10794 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
10795 PL_lex_state = LEX_INTERPEND;
10800 Perl_pmflag(pTHX_ U32* pmfl, int ch)
10802 PERL_UNUSED_CONTEXT;
10806 CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl);
10807 case GLOBAL_PAT_MOD: *pmfl |= PMf_GLOBAL; break;
10808 case CONTINUE_PAT_MOD: *pmfl |= PMf_CONTINUE; break;
10809 case ONCE_PAT_MOD: *pmfl |= PMf_KEEP; break;
10810 case KEEPCOPY_PAT_MOD: *pmfl |= PMf_KEEPCOPY; break;
10816 S_scan_pat(pTHX_ char *start, I32 type)
10820 char *s = scan_str(start,!!PL_madskills,FALSE);
10821 const char * const valid_flags =
10822 (const char *)((type == OP_QR) ? QR_PAT_MODS : M_PAT_MODS);
10829 const char * const delimiter = skipspace(start);
10833 ? "Search pattern not terminated or ternary operator parsed as search pattern"
10834 : "Search pattern not terminated" ));
10837 pm = (PMOP*)newPMOP(type, 0);
10838 if (PL_multi_open == '?') {
10839 /* This is the only point in the code that sets PMf_ONCE: */
10840 pm->op_pmflags |= PMf_ONCE;
10842 /* Hence it's safe to do this bit of PMOP book-keeping here, which
10843 allows us to restrict the list needed by reset to just the ??
10845 assert(type != OP_TRANS);
10847 MAGIC *mg = mg_find((SV*)PL_curstash, PERL_MAGIC_symtab);
10850 mg = sv_magicext((SV*)PL_curstash, 0, PERL_MAGIC_symtab, 0, 0,
10853 elements = mg->mg_len / sizeof(PMOP**);
10854 Renewc(mg->mg_ptr, elements + 1, PMOP*, char);
10855 ((PMOP**)mg->mg_ptr) [elements++] = pm;
10856 mg->mg_len = elements * sizeof(PMOP**);
10857 PmopSTASH_set(pm,PL_curstash);
10863 while (*s && strchr(valid_flags, *s))
10864 pmflag(&pm->op_pmflags,*s++);
10866 if (PL_madskills && modstart != s) {
10867 SV* tmptoken = newSVpvn(modstart, s - modstart);
10868 append_madprops(newMADPROP('m', MAD_SV, tmptoken, 0), (OP*)pm, 0);
10871 /* issue a warning if /c is specified,but /g is not */
10872 if ((pm->op_pmflags & PMf_CONTINUE) && !(pm->op_pmflags & PMf_GLOBAL)
10873 && ckWARN(WARN_REGEXP))
10875 Perl_warner(aTHX_ packWARN(WARN_REGEXP),
10876 "Use of /c modifier is meaningless without /g" );
10879 PL_lex_op = (OP*)pm;
10880 yylval.ival = OP_MATCH;
10885 S_scan_subst(pTHX_ char *start)
10896 yylval.ival = OP_NULL;
10898 s = scan_str(start,!!PL_madskills,FALSE);
10901 Perl_croak(aTHX_ "Substitution pattern not terminated");
10903 if (s[-1] == PL_multi_open)
10906 if (PL_madskills) {
10907 CURMAD('q', PL_thisopen);
10908 CURMAD('_', PL_thiswhite);
10909 CURMAD('E', PL_thisstuff);
10910 CURMAD('Q', PL_thisclose);
10911 PL_realtokenstart = s - SvPVX(PL_linestr);
10915 first_start = PL_multi_start;
10916 s = scan_str(s,!!PL_madskills,FALSE);
10918 if (PL_lex_stuff) {
10919 SvREFCNT_dec(PL_lex_stuff);
10920 PL_lex_stuff = NULL;
10922 Perl_croak(aTHX_ "Substitution replacement not terminated");
10924 PL_multi_start = first_start; /* so whole substitution is taken together */
10926 pm = (PMOP*)newPMOP(OP_SUBST, 0);
10929 if (PL_madskills) {
10930 CURMAD('z', PL_thisopen);
10931 CURMAD('R', PL_thisstuff);
10932 CURMAD('Z', PL_thisclose);
10938 if (*s == EXEC_PAT_MOD) {
10942 else if (strchr(S_PAT_MODS, *s))
10943 pmflag(&pm->op_pmflags,*s++);
10949 if (PL_madskills) {
10951 curmad('m', newSVpvn(modstart, s - modstart));
10952 append_madprops(PL_thismad, (OP*)pm, 0);
10956 if ((pm->op_pmflags & PMf_CONTINUE) && ckWARN(WARN_REGEXP)) {
10957 Perl_warner(aTHX_ packWARN(WARN_REGEXP), "Use of /c modifier is meaningless in s///" );
10961 SV * const repl = newSVpvs("");
10963 PL_sublex_info.super_bufptr = s;
10964 PL_sublex_info.super_bufend = PL_bufend;
10966 pm->op_pmflags |= PMf_EVAL;
10968 sv_catpv(repl, (const char *)(es ? "eval " : "do "));
10969 sv_catpvs(repl, "{");
10970 sv_catsv(repl, PL_lex_repl);
10971 if (strchr(SvPVX(PL_lex_repl), '#'))
10972 sv_catpvs(repl, "\n");
10973 sv_catpvs(repl, "}");
10975 SvREFCNT_dec(PL_lex_repl);
10976 PL_lex_repl = repl;
10979 PL_lex_op = (OP*)pm;
10980 yylval.ival = OP_SUBST;
10985 S_scan_trans(pTHX_ char *start)
10998 yylval.ival = OP_NULL;
11000 s = scan_str(start,!!PL_madskills,FALSE);
11002 Perl_croak(aTHX_ "Transliteration pattern not terminated");
11004 if (s[-1] == PL_multi_open)
11007 if (PL_madskills) {
11008 CURMAD('q', PL_thisopen);
11009 CURMAD('_', PL_thiswhite);
11010 CURMAD('E', PL_thisstuff);
11011 CURMAD('Q', PL_thisclose);
11012 PL_realtokenstart = s - SvPVX(PL_linestr);
11016 s = scan_str(s,!!PL_madskills,FALSE);
11018 if (PL_lex_stuff) {
11019 SvREFCNT_dec(PL_lex_stuff);
11020 PL_lex_stuff = NULL;
11022 Perl_croak(aTHX_ "Transliteration replacement not terminated");
11024 if (PL_madskills) {
11025 CURMAD('z', PL_thisopen);
11026 CURMAD('R', PL_thisstuff);
11027 CURMAD('Z', PL_thisclose);
11030 complement = del = squash = 0;
11037 complement = OPpTRANS_COMPLEMENT;
11040 del = OPpTRANS_DELETE;
11043 squash = OPpTRANS_SQUASH;
11052 tbl = (short *)PerlMemShared_calloc(complement&&!del?258:256, sizeof(short));
11053 o = newPVOP(OP_TRANS, 0, (char*)tbl);
11054 o->op_private &= ~OPpTRANS_ALL;
11055 o->op_private |= del|squash|complement|
11056 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
11057 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
11060 yylval.ival = OP_TRANS;
11063 if (PL_madskills) {
11065 curmad('m', newSVpvn(modstart, s - modstart));
11066 append_madprops(PL_thismad, o, 0);
11075 S_scan_heredoc(pTHX_ register char *s)
11079 I32 op_type = OP_SCALAR;
11083 const char *found_newline;
11087 const int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
11089 I32 stuffstart = s - SvPVX(PL_linestr);
11092 PL_realtokenstart = -1;
11097 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
11101 while (SPACE_OR_TAB(*peek))
11103 if (*peek == '`' || *peek == '\'' || *peek =='"') {
11106 s = delimcpy(d, e, s, PL_bufend, term, &len);
11116 if (!isALNUM_lazy_if(s,UTF))
11117 deprecate_old("bare << to mean <<\"\"");
11118 for (; isALNUM_lazy_if(s,UTF); s++) {
11123 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
11124 Perl_croak(aTHX_ "Delimiter for here document is too long");
11127 len = d - PL_tokenbuf;
11130 if (PL_madskills) {
11131 tstart = PL_tokenbuf + !outer;
11132 PL_thisclose = newSVpvn(tstart, len - !outer);
11133 tstart = SvPVX(PL_linestr) + stuffstart;
11134 PL_thisopen = newSVpvn(tstart, s - tstart);
11135 stuffstart = s - SvPVX(PL_linestr);
11138 #ifndef PERL_STRICT_CR
11139 d = strchr(s, '\r');
11141 char * const olds = s;
11143 while (s < PL_bufend) {
11149 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
11158 SvCUR_set(PL_linestr, PL_bufend - SvPVX_const(PL_linestr));
11165 if ( outer || !(found_newline = (char*)memchr((void*)s, '\n', PL_bufend - s)) ) {
11166 herewas = newSVpvn(s,PL_bufend-s);
11170 herewas = newSVpvn(s-1,found_newline-s+1);
11173 herewas = newSVpvn(s,found_newline-s);
11177 if (PL_madskills) {
11178 tstart = SvPVX(PL_linestr) + stuffstart;
11180 sv_catpvn(PL_thisstuff, tstart, s - tstart);
11182 PL_thisstuff = newSVpvn(tstart, s - tstart);
11185 s += SvCUR(herewas);
11188 stuffstart = s - SvPVX(PL_linestr);
11194 tmpstr = newSV_type(SVt_PVIV);
11195 SvGROW(tmpstr, 80);
11196 if (term == '\'') {
11197 op_type = OP_CONST;
11198 SvIV_set(tmpstr, -1);
11200 else if (term == '`') {
11201 op_type = OP_BACKTICK;
11202 SvIV_set(tmpstr, '\\');
11206 PL_multi_start = CopLINE(PL_curcop);
11207 PL_multi_open = PL_multi_close = '<';
11208 term = *PL_tokenbuf;
11209 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
11210 char * const bufptr = PL_sublex_info.super_bufptr;
11211 char * const bufend = PL_sublex_info.super_bufend;
11212 char * const olds = s - SvCUR(herewas);
11213 s = strchr(bufptr, '\n');
11217 while (s < bufend &&
11218 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
11220 CopLINE_inc(PL_curcop);
11223 CopLINE_set(PL_curcop, (line_t)PL_multi_start);
11224 missingterm(PL_tokenbuf);
11226 sv_setpvn(herewas,bufptr,d-bufptr+1);
11227 sv_setpvn(tmpstr,d+1,s-d);
11229 sv_catpvn(herewas,s,bufend-s);
11230 Copy(SvPVX_const(herewas),bufptr,SvCUR(herewas) + 1,char);
11237 while (s < PL_bufend &&
11238 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
11240 CopLINE_inc(PL_curcop);
11242 if (s >= PL_bufend) {
11243 CopLINE_set(PL_curcop, (line_t)PL_multi_start);
11244 missingterm(PL_tokenbuf);
11246 sv_setpvn(tmpstr,d+1,s-d);
11248 if (PL_madskills) {
11250 sv_catpvn(PL_thisstuff, d + 1, s - d);
11252 PL_thisstuff = newSVpvn(d + 1, s - d);
11253 stuffstart = s - SvPVX(PL_linestr);
11257 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
11259 sv_catpvn(herewas,s,PL_bufend-s);
11260 sv_setsv(PL_linestr,herewas);
11261 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
11262 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11263 PL_last_lop = PL_last_uni = NULL;
11266 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
11267 while (s >= PL_bufend) { /* multiple line string? */
11269 if (PL_madskills) {
11270 tstart = SvPVX(PL_linestr) + stuffstart;
11272 sv_catpvn(PL_thisstuff, tstart, PL_bufend - tstart);
11274 PL_thisstuff = newSVpvn(tstart, PL_bufend - tstart);
11278 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
11279 CopLINE_set(PL_curcop, (line_t)PL_multi_start);
11280 missingterm(PL_tokenbuf);
11283 stuffstart = s - SvPVX(PL_linestr);
11285 CopLINE_inc(PL_curcop);
11286 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11287 PL_last_lop = PL_last_uni = NULL;
11288 #ifndef PERL_STRICT_CR
11289 if (PL_bufend - PL_linestart >= 2) {
11290 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
11291 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
11293 PL_bufend[-2] = '\n';
11295 SvCUR_set(PL_linestr, PL_bufend - SvPVX_const(PL_linestr));
11297 else if (PL_bufend[-1] == '\r')
11298 PL_bufend[-1] = '\n';
11300 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
11301 PL_bufend[-1] = '\n';
11303 if (PERLDB_LINE && PL_curstash != PL_debstash)
11304 update_debugger_info(PL_linestr, NULL, 0);
11305 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
11306 STRLEN off = PL_bufend - 1 - SvPVX_const(PL_linestr);
11307 *(SvPVX(PL_linestr) + off ) = ' ';
11308 sv_catsv(PL_linestr,herewas);
11309 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11310 s = SvPVX(PL_linestr) + off; /* In case PV of PL_linestr moved. */
11314 sv_catsv(tmpstr,PL_linestr);
11319 PL_multi_end = CopLINE(PL_curcop);
11320 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
11321 SvPV_shrink_to_cur(tmpstr);
11323 SvREFCNT_dec(herewas);
11325 if (UTF && is_utf8_string((U8*)SvPVX_const(tmpstr), SvCUR(tmpstr)))
11327 else if (PL_encoding)
11328 sv_recode_to_utf8(tmpstr, PL_encoding);
11330 PL_lex_stuff = tmpstr;
11331 yylval.ival = op_type;
11335 /* scan_inputsymbol
11336 takes: current position in input buffer
11337 returns: new position in input buffer
11338 side-effects: yylval and lex_op are set.
11343 <FH> read from filehandle
11344 <pkg::FH> read from package qualified filehandle
11345 <pkg'FH> read from package qualified filehandle
11346 <$fh> read from filehandle in $fh
11347 <*.h> filename glob
11352 S_scan_inputsymbol(pTHX_ char *start)
11355 register char *s = start; /* current position in buffer */
11359 char *d = PL_tokenbuf; /* start of temp holding space */
11360 const char * const e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
11362 end = strchr(s, '\n');
11365 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
11367 /* die if we didn't have space for the contents of the <>,
11368 or if it didn't end, or if we see a newline
11371 if (len >= (I32)sizeof PL_tokenbuf)
11372 Perl_croak(aTHX_ "Excessively long <> operator");
11374 Perl_croak(aTHX_ "Unterminated <> operator");
11379 Remember, only scalar variables are interpreted as filehandles by
11380 this code. Anything more complex (e.g., <$fh{$num}>) will be
11381 treated as a glob() call.
11382 This code makes use of the fact that except for the $ at the front,
11383 a scalar variable and a filehandle look the same.
11385 if (*d == '$' && d[1]) d++;
11387 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
11388 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
11391 /* If we've tried to read what we allow filehandles to look like, and
11392 there's still text left, then it must be a glob() and not a getline.
11393 Use scan_str to pull out the stuff between the <> and treat it
11394 as nothing more than a string.
11397 if (d - PL_tokenbuf != len) {
11398 yylval.ival = OP_GLOB;
11400 s = scan_str(start,!!PL_madskills,FALSE);
11402 Perl_croak(aTHX_ "Glob not terminated");
11406 bool readline_overriden = FALSE;
11409 /* we're in a filehandle read situation */
11412 /* turn <> into <ARGV> */
11414 Copy("ARGV",d,5,char);
11416 /* Check whether readline() is overriden */
11417 gv_readline = gv_fetchpvs("readline", GV_NOTQUAL, SVt_PVCV);
11419 && GvCVu(gv_readline) && GvIMPORTED_CV(gv_readline))
11421 ((gvp = (GV**)hv_fetchs(PL_globalstash, "readline", FALSE))
11422 && (gv_readline = *gvp) && isGV_with_GP(gv_readline)
11423 && GvCVu(gv_readline) && GvIMPORTED_CV(gv_readline)))
11424 readline_overriden = TRUE;
11426 /* if <$fh>, create the ops to turn the variable into a
11430 /* try to find it in the pad for this block, otherwise find
11431 add symbol table ops
11433 const PADOFFSET tmp = pad_findmy(d);
11434 if (tmp != NOT_IN_PAD) {
11435 if (PAD_COMPNAME_FLAGS_isOUR(tmp)) {
11436 HV * const stash = PAD_COMPNAME_OURSTASH(tmp);
11437 HEK * const stashname = HvNAME_HEK(stash);
11438 SV * const sym = sv_2mortal(newSVhek(stashname));
11439 sv_catpvs(sym, "::");
11440 sv_catpv(sym, d+1);
11445 OP * const o = newOP(OP_PADSV, 0);
11447 PL_lex_op = readline_overriden
11448 ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED,
11449 append_elem(OP_LIST, o,
11450 newCVREF(0, newGVOP(OP_GV,0,gv_readline))))
11451 : (OP*)newUNOP(OP_READLINE, 0, o);
11460 ? (GV_ADDMULTI | GV_ADDINEVAL)
11463 PL_lex_op = readline_overriden
11464 ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED,
11465 append_elem(OP_LIST,
11466 newUNOP(OP_RV2SV, 0, newGVOP(OP_GV, 0, gv)),
11467 newCVREF(0, newGVOP(OP_GV, 0, gv_readline))))
11468 : (OP*)newUNOP(OP_READLINE, 0,
11469 newUNOP(OP_RV2SV, 0,
11470 newGVOP(OP_GV, 0, gv)));
11472 if (!readline_overriden)
11473 PL_lex_op->op_flags |= OPf_SPECIAL;
11474 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
11475 yylval.ival = OP_NULL;
11478 /* If it's none of the above, it must be a literal filehandle
11479 (<Foo::BAR> or <FOO>) so build a simple readline OP */
11481 GV * const gv = gv_fetchpv(d, GV_ADD, SVt_PVIO);
11482 PL_lex_op = readline_overriden
11483 ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED,
11484 append_elem(OP_LIST,
11485 newGVOP(OP_GV, 0, gv),
11486 newCVREF(0, newGVOP(OP_GV, 0, gv_readline))))
11487 : (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
11488 yylval.ival = OP_NULL;
11497 takes: start position in buffer
11498 keep_quoted preserve \ on the embedded delimiter(s)
11499 keep_delims preserve the delimiters around the string
11500 returns: position to continue reading from buffer
11501 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
11502 updates the read buffer.
11504 This subroutine pulls a string out of the input. It is called for:
11505 q single quotes q(literal text)
11506 ' single quotes 'literal text'
11507 qq double quotes qq(interpolate $here please)
11508 " double quotes "interpolate $here please"
11509 qx backticks qx(/bin/ls -l)
11510 ` backticks `/bin/ls -l`
11511 qw quote words @EXPORT_OK = qw( func() $spam )
11512 m// regexp match m/this/
11513 s/// regexp substitute s/this/that/
11514 tr/// string transliterate tr/this/that/
11515 y/// string transliterate y/this/that/
11516 ($*@) sub prototypes sub foo ($)
11517 (stuff) sub attr parameters sub foo : attr(stuff)
11518 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
11520 In most of these cases (all but <>, patterns and transliterate)
11521 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
11522 calls scan_str(). s/// makes yylex() call scan_subst() which calls
11523 scan_str(). tr/// and y/// make yylex() call scan_trans() which
11526 It skips whitespace before the string starts, and treats the first
11527 character as the delimiter. If the delimiter is one of ([{< then
11528 the corresponding "close" character )]}> is used as the closing
11529 delimiter. It allows quoting of delimiters, and if the string has
11530 balanced delimiters ([{<>}]) it allows nesting.
11532 On success, the SV with the resulting string is put into lex_stuff or,
11533 if that is already non-NULL, into lex_repl. The second case occurs only
11534 when parsing the RHS of the special constructs s/// and tr/// (y///).
11535 For convenience, the terminating delimiter character is stuffed into
11540 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
11543 SV *sv; /* scalar value: string */
11544 const char *tmps; /* temp string, used for delimiter matching */
11545 register char *s = start; /* current position in the buffer */
11546 register char term; /* terminating character */
11547 register char *to; /* current position in the sv's data */
11548 I32 brackets = 1; /* bracket nesting level */
11549 bool has_utf8 = FALSE; /* is there any utf8 content? */
11550 I32 termcode; /* terminating char. code */
11551 U8 termstr[UTF8_MAXBYTES]; /* terminating string */
11552 STRLEN termlen; /* length of terminating string */
11553 int last_off = 0; /* last position for nesting bracket */
11559 /* skip space before the delimiter */
11565 if (PL_realtokenstart >= 0) {
11566 stuffstart = PL_realtokenstart;
11567 PL_realtokenstart = -1;
11570 stuffstart = start - SvPVX(PL_linestr);
11572 /* mark where we are, in case we need to report errors */
11575 /* after skipping whitespace, the next character is the terminator */
11578 termcode = termstr[0] = term;
11582 termcode = utf8_to_uvchr((U8*)s, &termlen);
11583 Copy(s, termstr, termlen, U8);
11584 if (!UTF8_IS_INVARIANT(term))
11588 /* mark where we are */
11589 PL_multi_start = CopLINE(PL_curcop);
11590 PL_multi_open = term;
11592 /* find corresponding closing delimiter */
11593 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
11594 termcode = termstr[0] = term = tmps[5];
11596 PL_multi_close = term;
11598 /* create a new SV to hold the contents. 79 is the SV's initial length.
11599 What a random number. */
11600 sv = newSV_type(SVt_PVIV);
11602 SvIV_set(sv, termcode);
11603 (void)SvPOK_only(sv); /* validate pointer */
11605 /* move past delimiter and try to read a complete string */
11607 sv_catpvn(sv, s, termlen);
11610 tstart = SvPVX(PL_linestr) + stuffstart;
11611 if (!PL_thisopen && !keep_delims) {
11612 PL_thisopen = newSVpvn(tstart, s - tstart);
11613 stuffstart = s - SvPVX(PL_linestr);
11617 if (PL_encoding && !UTF) {
11621 int offset = s - SvPVX_const(PL_linestr);
11622 const bool found = sv_cat_decode(sv, PL_encoding, PL_linestr,
11623 &offset, (char*)termstr, termlen);
11624 const char * const ns = SvPVX_const(PL_linestr) + offset;
11625 char * const svlast = SvEND(sv) - 1;
11627 for (; s < ns; s++) {
11628 if (*s == '\n' && !PL_rsfp)
11629 CopLINE_inc(PL_curcop);
11632 goto read_more_line;
11634 /* handle quoted delimiters */
11635 if (SvCUR(sv) > 1 && *(svlast-1) == '\\') {
11637 for (t = svlast-2; t >= SvPVX_const(sv) && *t == '\\';)
11639 if ((svlast-1 - t) % 2) {
11640 if (!keep_quoted) {
11641 *(svlast-1) = term;
11643 SvCUR_set(sv, SvCUR(sv) - 1);
11648 if (PL_multi_open == PL_multi_close) {
11654 for (t = w = SvPVX(sv)+last_off; t < svlast; w++, t++) {
11655 /* At here, all closes are "was quoted" one,
11656 so we don't check PL_multi_close. */
11658 if (!keep_quoted && *(t+1) == PL_multi_open)
11663 else if (*t == PL_multi_open)
11671 SvCUR_set(sv, w - SvPVX_const(sv));
11673 last_off = w - SvPVX(sv);
11674 if (--brackets <= 0)
11679 if (!keep_delims) {
11680 SvCUR_set(sv, SvCUR(sv) - 1);
11686 /* extend sv if need be */
11687 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
11688 /* set 'to' to the next character in the sv's string */
11689 to = SvPVX(sv)+SvCUR(sv);
11691 /* if open delimiter is the close delimiter read unbridle */
11692 if (PL_multi_open == PL_multi_close) {
11693 for (; s < PL_bufend; s++,to++) {
11694 /* embedded newlines increment the current line number */
11695 if (*s == '\n' && !PL_rsfp)
11696 CopLINE_inc(PL_curcop);
11697 /* handle quoted delimiters */
11698 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
11699 if (!keep_quoted && s[1] == term)
11701 /* any other quotes are simply copied straight through */
11705 /* terminate when run out of buffer (the for() condition), or
11706 have found the terminator */
11707 else if (*s == term) {
11710 if (s+termlen <= PL_bufend && memEQ(s, (char*)termstr, termlen))
11713 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
11719 /* if the terminator isn't the same as the start character (e.g.,
11720 matched brackets), we have to allow more in the quoting, and
11721 be prepared for nested brackets.
11724 /* read until we run out of string, or we find the terminator */
11725 for (; s < PL_bufend; s++,to++) {
11726 /* embedded newlines increment the line count */
11727 if (*s == '\n' && !PL_rsfp)
11728 CopLINE_inc(PL_curcop);
11729 /* backslashes can escape the open or closing characters */
11730 if (*s == '\\' && s+1 < PL_bufend) {
11731 if (!keep_quoted &&
11732 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
11737 /* allow nested opens and closes */
11738 else if (*s == PL_multi_close && --brackets <= 0)
11740 else if (*s == PL_multi_open)
11742 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
11747 /* terminate the copied string and update the sv's end-of-string */
11749 SvCUR_set(sv, to - SvPVX_const(sv));
11752 * this next chunk reads more into the buffer if we're not done yet
11756 break; /* handle case where we are done yet :-) */
11758 #ifndef PERL_STRICT_CR
11759 if (to - SvPVX_const(sv) >= 2) {
11760 if ((to[-2] == '\r' && to[-1] == '\n') ||
11761 (to[-2] == '\n' && to[-1] == '\r'))
11765 SvCUR_set(sv, to - SvPVX_const(sv));
11767 else if (to[-1] == '\r')
11770 else if (to - SvPVX_const(sv) == 1 && to[-1] == '\r')
11775 /* if we're out of file, or a read fails, bail and reset the current
11776 line marker so we can report where the unterminated string began
11779 if (PL_madskills) {
11780 char * const tstart = SvPVX(PL_linestr) + stuffstart;
11782 sv_catpvn(PL_thisstuff, tstart, PL_bufend - tstart);
11784 PL_thisstuff = newSVpvn(tstart, PL_bufend - tstart);
11788 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
11790 CopLINE_set(PL_curcop, (line_t)PL_multi_start);
11796 /* we read a line, so increment our line counter */
11797 CopLINE_inc(PL_curcop);
11799 /* update debugger info */
11800 if (PERLDB_LINE && PL_curstash != PL_debstash)
11801 update_debugger_info(PL_linestr, NULL, 0);
11803 /* having changed the buffer, we must update PL_bufend */
11804 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11805 PL_last_lop = PL_last_uni = NULL;
11808 /* at this point, we have successfully read the delimited string */
11810 if (!PL_encoding || UTF) {
11812 if (PL_madskills) {
11813 char * const tstart = SvPVX(PL_linestr) + stuffstart;
11814 const int len = s - tstart;
11816 sv_catpvn(PL_thisstuff, tstart, len);
11818 PL_thisstuff = newSVpvn(tstart, len);
11819 if (!PL_thisclose && !keep_delims)
11820 PL_thisclose = newSVpvn(s,termlen);
11825 sv_catpvn(sv, s, termlen);
11830 if (PL_madskills) {
11831 char * const tstart = SvPVX(PL_linestr) + stuffstart;
11832 const int len = s - tstart - termlen;
11834 sv_catpvn(PL_thisstuff, tstart, len);
11836 PL_thisstuff = newSVpvn(tstart, len);
11837 if (!PL_thisclose && !keep_delims)
11838 PL_thisclose = newSVpvn(s - termlen,termlen);
11842 if (has_utf8 || PL_encoding)
11845 PL_multi_end = CopLINE(PL_curcop);
11847 /* if we allocated too much space, give some back */
11848 if (SvCUR(sv) + 5 < SvLEN(sv)) {
11849 SvLEN_set(sv, SvCUR(sv) + 1);
11850 SvPV_renew(sv, SvLEN(sv));
11853 /* decide whether this is the first or second quoted string we've read
11866 takes: pointer to position in buffer
11867 returns: pointer to new position in buffer
11868 side-effects: builds ops for the constant in yylval.op
11870 Read a number in any of the formats that Perl accepts:
11872 \d(_?\d)*(\.(\d(_?\d)*)?)?[Ee][\+\-]?(\d(_?\d)*) 12 12.34 12.
11873 \.\d(_?\d)*[Ee][\+\-]?(\d(_?\d)*) .34
11876 0x[0-9A-Fa-f](_?[0-9A-Fa-f])*
11878 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
11881 If it reads a number without a decimal point or an exponent, it will
11882 try converting the number to an integer and see if it can do so
11883 without loss of precision.
11887 Perl_scan_num(pTHX_ const char *start, YYSTYPE* lvalp)
11890 register const char *s = start; /* current position in buffer */
11891 register char *d; /* destination in temp buffer */
11892 register char *e; /* end of temp buffer */
11893 NV nv; /* number read, as a double */
11894 SV *sv = NULL; /* place to put the converted number */
11895 bool floatit; /* boolean: int or float? */
11896 const char *lastub = NULL; /* position of last underbar */
11897 static char const number_too_long[] = "Number too long";
11899 /* We use the first character to decide what type of number this is */
11903 Perl_croak(aTHX_ "panic: scan_num");
11905 /* if it starts with a 0, it could be an octal number, a decimal in
11906 0.13 disguise, or a hexadecimal number, or a binary number. */
11910 u holds the "number so far"
11911 shift the power of 2 of the base
11912 (hex == 4, octal == 3, binary == 1)
11913 overflowed was the number more than we can hold?
11915 Shift is used when we add a digit. It also serves as an "are
11916 we in octal/hex/binary?" indicator to disallow hex characters
11917 when in octal mode.
11922 bool overflowed = FALSE;
11923 bool just_zero = TRUE; /* just plain 0 or binary number? */
11924 static const NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
11925 static const char* const bases[5] =
11926 { "", "binary", "", "octal", "hexadecimal" };
11927 static const char* const Bases[5] =
11928 { "", "Binary", "", "Octal", "Hexadecimal" };
11929 static const char* const maxima[5] =
11931 "0b11111111111111111111111111111111",
11935 const char *base, *Base, *max;
11937 /* check for hex */
11942 } else if (s[1] == 'b') {
11947 /* check for a decimal in disguise */
11948 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
11950 /* so it must be octal */
11957 if (ckWARN(WARN_SYNTAX))
11958 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
11959 "Misplaced _ in number");
11963 base = bases[shift];
11964 Base = Bases[shift];
11965 max = maxima[shift];
11967 /* read the rest of the number */
11969 /* x is used in the overflow test,
11970 b is the digit we're adding on. */
11975 /* if we don't mention it, we're done */
11979 /* _ are ignored -- but warned about if consecutive */
11981 if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX))
11982 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
11983 "Misplaced _ in number");
11987 /* 8 and 9 are not octal */
11988 case '8': case '9':
11990 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
11994 case '2': case '3': case '4':
11995 case '5': case '6': case '7':
11997 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
12000 case '0': case '1':
12001 b = *s++ & 15; /* ASCII digit -> value of digit */
12005 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
12006 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
12007 /* make sure they said 0x */
12010 b = (*s++ & 7) + 9;
12012 /* Prepare to put the digit we have onto the end
12013 of the number so far. We check for overflows.
12019 x = u << shift; /* make room for the digit */
12021 if ((x >> shift) != u
12022 && !(PL_hints & HINT_NEW_BINARY)) {
12025 if (ckWARN_d(WARN_OVERFLOW))
12026 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
12027 "Integer overflow in %s number",
12030 u = x | b; /* add the digit to the end */
12033 n *= nvshift[shift];
12034 /* If an NV has not enough bits in its
12035 * mantissa to represent an UV this summing of
12036 * small low-order numbers is a waste of time
12037 * (because the NV cannot preserve the
12038 * low-order bits anyway): we could just
12039 * remember when did we overflow and in the
12040 * end just multiply n by the right
12048 /* if we get here, we had success: make a scalar value from
12053 /* final misplaced underbar check */
12054 if (s[-1] == '_') {
12055 if (ckWARN(WARN_SYNTAX))
12056 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number");
12061 if (n > 4294967295.0 && ckWARN(WARN_PORTABLE))
12062 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
12063 "%s number > %s non-portable",
12069 if (u > 0xffffffff && ckWARN(WARN_PORTABLE))
12070 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
12071 "%s number > %s non-portable",
12076 if (just_zero && (PL_hints & HINT_NEW_INTEGER))
12077 sv = new_constant(start, s - start, "integer",
12079 else if (PL_hints & HINT_NEW_BINARY)
12080 sv = new_constant(start, s - start, "binary", sv, NULL, NULL);
12085 handle decimal numbers.
12086 we're also sent here when we read a 0 as the first digit
12088 case '1': case '2': case '3': case '4': case '5':
12089 case '6': case '7': case '8': case '9': case '.':
12092 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
12095 /* read next group of digits and _ and copy into d */
12096 while (isDIGIT(*s) || *s == '_') {
12097 /* skip underscores, checking for misplaced ones
12101 if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX))
12102 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12103 "Misplaced _ in number");
12107 /* check for end of fixed-length buffer */
12109 Perl_croak(aTHX_ number_too_long);
12110 /* if we're ok, copy the character */
12115 /* final misplaced underbar check */
12116 if (lastub && s == lastub + 1) {
12117 if (ckWARN(WARN_SYNTAX))
12118 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number");
12121 /* read a decimal portion if there is one. avoid
12122 3..5 being interpreted as the number 3. followed
12125 if (*s == '.' && s[1] != '.') {
12130 if (ckWARN(WARN_SYNTAX))
12131 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12132 "Misplaced _ in number");
12136 /* copy, ignoring underbars, until we run out of digits.
12138 for (; isDIGIT(*s) || *s == '_'; s++) {
12139 /* fixed length buffer check */
12141 Perl_croak(aTHX_ number_too_long);
12143 if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX))
12144 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12145 "Misplaced _ in number");
12151 /* fractional part ending in underbar? */
12152 if (s[-1] == '_') {
12153 if (ckWARN(WARN_SYNTAX))
12154 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12155 "Misplaced _ in number");
12157 if (*s == '.' && isDIGIT(s[1])) {
12158 /* oops, it's really a v-string, but without the "v" */
12164 /* read exponent part, if present */
12165 if ((*s == 'e' || *s == 'E') && strchr("+-0123456789_", s[1])) {
12169 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
12170 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
12172 /* stray preinitial _ */
12174 if (ckWARN(WARN_SYNTAX))
12175 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12176 "Misplaced _ in number");
12180 /* allow positive or negative exponent */
12181 if (*s == '+' || *s == '-')
12184 /* stray initial _ */
12186 if (ckWARN(WARN_SYNTAX))
12187 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12188 "Misplaced _ in number");
12192 /* read digits of exponent */
12193 while (isDIGIT(*s) || *s == '_') {
12196 Perl_croak(aTHX_ number_too_long);
12200 if (((lastub && s == lastub + 1) ||
12201 (!isDIGIT(s[1]) && s[1] != '_'))
12202 && ckWARN(WARN_SYNTAX))
12203 Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
12204 "Misplaced _ in number");
12211 /* make an sv from the string */
12215 We try to do an integer conversion first if no characters
12216 indicating "float" have been found.
12221 const int flags = grok_number (PL_tokenbuf, d - PL_tokenbuf, &uv);
12223 if (flags == IS_NUMBER_IN_UV) {
12225 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
12228 } else if (flags == (IS_NUMBER_IN_UV | IS_NUMBER_NEG)) {
12229 if (uv <= (UV) IV_MIN)
12230 sv_setiv(sv, -(IV)uv);
12237 /* terminate the string */
12239 nv = Atof(PL_tokenbuf);
12243 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
12244 (PL_hints & HINT_NEW_INTEGER) )
12245 sv = new_constant(PL_tokenbuf,
12248 (floatit ? "float" : "integer"),
12252 /* if it starts with a v, it could be a v-string */
12255 sv = newSV(5); /* preallocate storage space */
12256 s = scan_vstring(s, PL_bufend, sv);
12260 /* make the op for the constant and return */
12263 lvalp->opval = newSVOP(OP_CONST, 0, sv);
12265 lvalp->opval = NULL;
12271 S_scan_formline(pTHX_ register char *s)
12274 register char *eol;
12276 SV * const stuff = newSVpvs("");
12277 bool needargs = FALSE;
12278 bool eofmt = FALSE;
12280 char *tokenstart = s;
12283 if (PL_madskills) {
12284 savewhite = PL_thiswhite;
12289 while (!needargs) {
12292 #ifdef PERL_STRICT_CR
12293 while (SPACE_OR_TAB(*t))
12296 while (SPACE_OR_TAB(*t) || *t == '\r')
12299 if (*t == '\n' || t == PL_bufend) {
12304 if (PL_in_eval && !PL_rsfp) {
12305 eol = (char *) memchr(s,'\n',PL_bufend-s);
12310 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
12312 for (t = s; t < eol; t++) {
12313 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
12315 goto enough; /* ~~ must be first line in formline */
12317 if (*t == '@' || *t == '^')
12321 sv_catpvn(stuff, s, eol-s);
12322 #ifndef PERL_STRICT_CR
12323 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
12324 char *end = SvPVX(stuff) + SvCUR(stuff);
12327 SvCUR_set(stuff, SvCUR(stuff) - 1);
12337 if (PL_madskills) {
12339 sv_catpvn(PL_thistoken, tokenstart, PL_bufend - tokenstart);
12341 PL_thistoken = newSVpvn(tokenstart, PL_bufend - tokenstart);
12344 s = filter_gets(PL_linestr, PL_rsfp, 0);
12346 tokenstart = PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
12348 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
12350 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
12351 PL_last_lop = PL_last_uni = NULL;
12360 if (SvCUR(stuff)) {
12363 PL_lex_state = LEX_NORMAL;
12364 start_force(PL_curforce);
12365 NEXTVAL_NEXTTOKE.ival = 0;
12369 PL_lex_state = LEX_FORMLINE;
12371 if (UTF && is_utf8_string((U8*)SvPVX_const(stuff), SvCUR(stuff)))
12373 else if (PL_encoding)
12374 sv_recode_to_utf8(stuff, PL_encoding);
12376 start_force(PL_curforce);
12377 NEXTVAL_NEXTTOKE.opval = (OP*)newSVOP(OP_CONST, 0, stuff);
12379 start_force(PL_curforce);
12380 NEXTVAL_NEXTTOKE.ival = OP_FORMLINE;
12384 SvREFCNT_dec(stuff);
12386 PL_lex_formbrack = 0;
12390 if (PL_madskills) {
12392 sv_catpvn(PL_thistoken, tokenstart, s - tokenstart);
12394 PL_thistoken = newSVpvn(tokenstart, s - tokenstart);
12395 PL_thiswhite = savewhite;
12407 PL_cshlen = strlen(PL_cshname);
12409 #if defined(USE_ITHREADS)
12410 PERL_UNUSED_CONTEXT;
12416 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
12419 const I32 oldsavestack_ix = PL_savestack_ix;
12420 CV* const outsidecv = PL_compcv;
12423 assert(SvTYPE(PL_compcv) == SVt_PVCV);
12425 SAVEI32(PL_subline);
12426 save_item(PL_subname);
12427 SAVESPTR(PL_compcv);
12429 PL_compcv = (CV*)newSV_type(is_format ? SVt_PVFM : SVt_PVCV);
12430 CvFLAGS(PL_compcv) |= flags;
12432 PL_subline = CopLINE(PL_curcop);
12433 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE|padnew_SAVESUB);
12434 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outsidecv);
12435 CvOUTSIDE_SEQ(PL_compcv) = PL_cop_seqmax;
12437 return oldsavestack_ix;
12441 #pragma segment Perl_yylex
12444 Perl_yywarn(pTHX_ const char *s)
12447 PL_in_eval |= EVAL_WARNONLY;
12449 PL_in_eval &= ~EVAL_WARNONLY;
12454 Perl_yyerror(pTHX_ const char *s)
12457 const char *where = NULL;
12458 const char *context = NULL;
12461 int yychar = PL_parser->yychar;
12463 if (!yychar || (yychar == ';' && !PL_rsfp))
12465 else if (PL_oldoldbufptr && PL_bufptr > PL_oldoldbufptr &&
12466 PL_bufptr - PL_oldoldbufptr < 200 && PL_oldoldbufptr != PL_oldbufptr &&
12467 PL_oldbufptr != PL_bufptr) {
12470 The code below is removed for NetWare because it abends/crashes on NetWare
12471 when the script has error such as not having the closing quotes like:
12472 if ($var eq "value)
12473 Checking of white spaces is anyway done in NetWare code.
12476 while (isSPACE(*PL_oldoldbufptr))
12479 context = PL_oldoldbufptr;
12480 contlen = PL_bufptr - PL_oldoldbufptr;
12482 else if (PL_oldbufptr && PL_bufptr > PL_oldbufptr &&
12483 PL_bufptr - PL_oldbufptr < 200 && PL_oldbufptr != PL_bufptr) {
12486 The code below is removed for NetWare because it abends/crashes on NetWare
12487 when the script has error such as not having the closing quotes like:
12488 if ($var eq "value)
12489 Checking of white spaces is anyway done in NetWare code.
12492 while (isSPACE(*PL_oldbufptr))
12495 context = PL_oldbufptr;
12496 contlen = PL_bufptr - PL_oldbufptr;
12498 else if (yychar > 255)
12499 where = "next token ???";
12500 else if (yychar == -2) { /* YYEMPTY */
12501 if (PL_lex_state == LEX_NORMAL ||
12502 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
12503 where = "at end of line";
12504 else if (PL_lex_inpat)
12505 where = "within pattern";
12507 where = "within string";
12510 SV * const where_sv = sv_2mortal(newSVpvs("next char "));
12512 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
12513 else if (isPRINT_LC(yychar))
12514 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
12516 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
12517 where = SvPVX_const(where_sv);
12519 msg = sv_2mortal(newSVpv(s, 0));
12520 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
12521 OutCopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
12523 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
12525 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
12526 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
12527 Perl_sv_catpvf(aTHX_ msg,
12528 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
12529 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
12532 if (PL_in_eval & EVAL_WARNONLY) {
12533 if (ckWARN_d(WARN_SYNTAX))
12534 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "%"SVf, SVfARG(msg));
12538 if (PL_error_count >= 10) {
12539 if (PL_in_eval && SvCUR(ERRSV))
12540 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
12541 SVfARG(ERRSV), OutCopFILE(PL_curcop));
12543 Perl_croak(aTHX_ "%s has too many errors.\n",
12544 OutCopFILE(PL_curcop));
12547 PL_in_my_stash = NULL;
12551 #pragma segment Main
12555 S_swallow_bom(pTHX_ U8 *s)
12558 const STRLEN slen = SvCUR(PL_linestr);
12561 if (s[1] == 0xFE) {
12562 /* UTF-16 little-endian? (or UTF32-LE?) */
12563 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
12564 Perl_croak(aTHX_ "Unsupported script encoding UTF32-LE");
12565 #ifndef PERL_NO_UTF16_FILTER
12566 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF16-LE script encoding (BOM)\n");
12569 if (PL_bufend > (char*)s) {
12573 filter_add(utf16rev_textfilter, NULL);
12574 Newx(news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
12575 utf16_to_utf8_reversed(s, news,
12576 PL_bufend - (char*)s - 1,
12578 sv_setpvn(PL_linestr, (const char*)news, newlen);
12580 s = (U8*)SvPVX(PL_linestr);
12581 Copy(news, s, newlen, U8);
12585 SvUTF8_on(PL_linestr);
12586 s = (U8*)SvPVX(PL_linestr);
12588 /* FIXME - is this a general bug fix? */
12591 PL_bufend = SvPVX(PL_linestr) + newlen;
12594 Perl_croak(aTHX_ "Unsupported script encoding UTF16-LE");
12599 if (s[1] == 0xFF) { /* UTF-16 big-endian? */
12600 #ifndef PERL_NO_UTF16_FILTER
12601 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding (BOM)\n");
12604 if (PL_bufend > (char *)s) {
12608 filter_add(utf16_textfilter, NULL);
12609 Newx(news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
12610 utf16_to_utf8(s, news,
12611 PL_bufend - (char*)s,
12613 sv_setpvn(PL_linestr, (const char*)news, newlen);
12615 SvUTF8_on(PL_linestr);
12616 s = (U8*)SvPVX(PL_linestr);
12617 PL_bufend = SvPVX(PL_linestr) + newlen;
12620 Perl_croak(aTHX_ "Unsupported script encoding UTF16-BE");
12625 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
12626 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-8 script encoding (BOM)\n");
12627 s += 3; /* UTF-8 */
12633 if (s[2] == 0xFE && s[3] == 0xFF) {
12634 /* UTF-32 big-endian */
12635 Perl_croak(aTHX_ "Unsupported script encoding UTF32-BE");
12638 else if (s[2] == 0 && s[3] != 0) {
12641 * are a good indicator of UTF-16BE. */
12642 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding (no BOM)\n");
12648 if (slen > 3 && s[1] == 0x73 && s[2] == 0x66 && s[3] == 0x73) {
12649 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-8 script encoding (BOM)\n");
12650 s += 4; /* UTF-8 */
12656 if (slen > 3 && s[1] == 0 && s[2] != 0 && s[3] == 0) {
12659 * are a good indicator of UTF-16LE. */
12660 if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16LE script encoding (no BOM)\n");
12668 #ifndef PERL_NO_UTF16_FILTER
12670 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen)
12673 const STRLEN old = SvCUR(sv);
12674 const I32 count = FILTER_READ(idx+1, sv, maxlen);
12675 DEBUG_P(PerlIO_printf(Perl_debug_log,
12676 "utf16_textfilter(%p): %d %d (%d)\n",
12677 FPTR2DPTR(void *, utf16_textfilter),
12678 idx, maxlen, (int) count));
12682 Newx(tmps, SvCUR(sv) * 3 / 2 + 1, U8);
12683 Copy(SvPVX_const(sv), tmps, old, char);
12684 utf16_to_utf8((U8*)SvPVX_const(sv) + old, tmps + old,
12685 SvCUR(sv) - old, &newlen);
12686 sv_usepvn(sv, (char*)tmps, (STRLEN)newlen + old);
12688 DEBUG_P({sv_dump(sv);});
12693 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen)
12696 const STRLEN old = SvCUR(sv);
12697 const I32 count = FILTER_READ(idx+1, sv, maxlen);
12698 DEBUG_P(PerlIO_printf(Perl_debug_log,
12699 "utf16rev_textfilter(%p): %d %d (%d)\n",
12700 FPTR2DPTR(void *, utf16rev_textfilter),
12701 idx, maxlen, (int) count));
12705 Newx(tmps, SvCUR(sv) * 3 / 2 + 1, U8);
12706 Copy(SvPVX_const(sv), tmps, old, char);
12707 utf16_to_utf8((U8*)SvPVX_const(sv) + old, tmps + old,
12708 SvCUR(sv) - old, &newlen);
12709 sv_usepvn(sv, (char*)tmps, (STRLEN)newlen + old);
12711 DEBUG_P({ sv_dump(sv); });
12717 Returns a pointer to the next character after the parsed
12718 vstring, as well as updating the passed in sv.
12720 Function must be called like
12723 s = scan_vstring(s,e,sv);
12725 where s and e are the start and end of the string.
12726 The sv should already be large enough to store the vstring
12727 passed in, for performance reasons.
12732 Perl_scan_vstring(pTHX_ const char *s, const char *e, SV *sv)
12735 const char *pos = s;
12736 const char *start = s;
12737 if (*pos == 'v') pos++; /* get past 'v' */
12738 while (pos < e && (isDIGIT(*pos) || *pos == '_'))
12740 if ( *pos != '.') {
12741 /* this may not be a v-string if followed by => */
12742 const char *next = pos;
12743 while (next < e && isSPACE(*next))
12745 if ((e - next) >= 2 && *next == '=' && next[1] == '>' ) {
12746 /* return string not v-string */
12747 sv_setpvn(sv,(char *)s,pos-s);
12748 return (char *)pos;
12752 if (!isALPHA(*pos)) {
12753 U8 tmpbuf[UTF8_MAXBYTES+1];
12756 s++; /* get past 'v' */
12758 sv_setpvn(sv, "", 0);
12761 /* this is atoi() that tolerates underscores */
12764 const char *end = pos;
12766 while (--end >= s) {
12768 const UV orev = rev;
12769 rev += (*end - '0') * mult;
12771 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
12772 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
12773 "Integer overflow in decimal number");
12777 if (rev > 0x7FFFFFFF)
12778 Perl_croak(aTHX_ "In EBCDIC the v-string components cannot exceed 2147483647");
12780 /* Append native character for the rev point */
12781 tmpend = uvchr_to_utf8(tmpbuf, rev);
12782 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
12783 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
12785 if (pos + 1 < e && *pos == '.' && isDIGIT(pos[1]))
12791 while (pos < e && (isDIGIT(*pos) || *pos == '_'))
12795 sv_magic(sv,NULL,PERL_MAGIC_vstring,(const char*)start, pos-start);
12803 * c-indentation-style: bsd
12804 * c-basic-offset: 4
12805 * indent-tabs-mode: t
12808 * ex: set ts=8 sts=4 sw=4 noet: