3 * Copyright (c) 1991-2001, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
15 * This file is the lexer for Perl. It's closely linked to the
18 * The main routine is yylex(), which returns the next token.
22 #define PERL_IN_TOKE_C
25 #define yychar PL_yychar
26 #define yylval PL_yylval
28 static char ident_too_long[] = "Identifier too long";
30 static void restore_rsfp(pTHX_ void *f);
31 #ifndef PERL_NO_UTF16_FILTER
32 static I32 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen);
33 static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen);
36 #define XFAKEBRACK 128
39 #ifdef USE_UTF8_SCRIPTS
40 # define UTF (!IN_BYTES)
42 # ifdef EBCDIC /* For now 'use utf8' does not affect tokenizer on EBCDIC */
43 # define UTF (PL_linestr && DO_UTF8(PL_linestr))
45 # define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
49 /* In variables named $^X, these are the legal values for X.
50 * 1999-02-27 mjd-perl-patch@plover.com */
51 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
53 /* On MacOS, respect nonbreaking spaces */
54 #ifdef MACOS_TRADITIONAL
55 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
57 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
60 /* LEX_* are values for PL_lex_state, the state of the lexer.
61 * They are arranged oddly so that the guard on the switch statement
62 * can get by with a single comparison (if the compiler is smart enough).
65 /* #define LEX_NOTPARSING 11 is done in perl.h. */
68 #define LEX_INTERPNORMAL 9
69 #define LEX_INTERPCASEMOD 8
70 #define LEX_INTERPPUSH 7
71 #define LEX_INTERPSTART 6
72 #define LEX_INTERPEND 5
73 #define LEX_INTERPENDMAYBE 4
74 #define LEX_INTERPCONCAT 3
75 #define LEX_INTERPCONST 2
76 #define LEX_FORMLINE 1
77 #define LEX_KNOWNEXT 0
85 # define YYMAXLEVEL 100
87 YYSTYPE* yylval_pointer[YYMAXLEVEL];
88 int* yychar_pointer[YYMAXLEVEL];
92 # define yylval (*yylval_pointer[yyactlevel])
93 # define yychar (*yychar_pointer[yyactlevel])
94 # define PERL_YYLEX_PARAM yylval_pointer[yyactlevel],yychar_pointer[yyactlevel]
96 # define yylex() Perl_yylex_r(aTHX_ yylval_pointer[yyactlevel],yychar_pointer[yyactlevel])
101 /* CLINE is a macro that ensures PL_copline has a sane value */
106 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
109 * Convenience functions to return different tokens and prime the
110 * lexer for the next token. They all take an argument.
112 * TOKEN : generic token (used for '(', DOLSHARP, etc)
113 * OPERATOR : generic operator
114 * AOPERATOR : assignment operator
115 * PREBLOCK : beginning the block after an if, while, foreach, ...
116 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
117 * PREREF : *EXPR where EXPR is not a simple identifier
118 * TERM : expression term
119 * LOOPX : loop exiting command (goto, last, dump, etc)
120 * FTST : file test operator
121 * FUN0 : zero-argument function
122 * FUN1 : not used, except for not, which isn't a UNIOP
123 * BOop : bitwise or or xor
125 * SHop : shift operator
126 * PWop : power operator
127 * PMop : pattern-matching operator
128 * Aop : addition-level operator
129 * Mop : multiplication-level operator
130 * Eop : equality-testing operator
131 * Rop : relational operator <= != gt
133 * Also see LOP and lop() below.
136 /* Note that REPORT() and REPORT2() will be expressions that supply
137 * their own trailing comma, not suitable for statements as such. */
138 #ifdef DEBUGGING /* Serve -DT. */
139 # define REPORT(x,retval) tokereport(x,s,(int)retval),
140 # define REPORT2(x,retval) tokereport(x,s, yylval.ival),
142 # define REPORT(x,retval)
143 # define REPORT2(x,retval)
146 #define TOKEN(retval) return (REPORT2("token",retval) PL_bufptr = s,(int)retval)
147 #define OPERATOR(retval) return (REPORT2("operator",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval)
148 #define AOPERATOR(retval) return ao((REPORT2("aop",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval))
149 #define PREBLOCK(retval) return (REPORT2("preblock",retval) PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
150 #define PRETERMBLOCK(retval) return (REPORT2("pretermblock",retval) PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
151 #define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
152 #define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
153 #define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
154 #define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
155 #define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
156 #define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
157 #define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
158 #define BAop(f) return ao((yylval.ival=f, REPORT("bitandop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
159 #define SHop(f) return ao((yylval.ival=f, REPORT("shiftop",f) PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
160 #define PWop(f) return ao((yylval.ival=f, REPORT("powop",f) PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
161 #define PMop(f) return(yylval.ival=f, REPORT("matchop",f) PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
162 #define Aop(f) return ao((yylval.ival=f, REPORT("add",f) PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
163 #define Mop(f) return ao((yylval.ival=f, REPORT("mul",f) PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
164 #define Eop(f) return(yylval.ival=f, REPORT("eq",f) PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
165 #define Rop(f) return(yylval.ival=f, REPORT("rel",f) PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
167 /* This bit of chicanery makes a unary function followed by
168 * a parenthesis into a function with one argument, highest precedence.
170 #define UNI(f) return(yylval.ival = f, \
174 PL_last_uni = PL_oldbufptr, \
175 PL_last_lop_op = f, \
176 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
178 #define UNIBRACK(f) return(yylval.ival = f, \
181 PL_last_uni = PL_oldbufptr, \
182 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
184 /* grandfather return to old style */
185 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
190 S_tokereport(pTHX_ char *thing, char* s, I32 rv)
193 SV* report = newSVpv(thing, 0);
194 Perl_sv_catpvf(aTHX_ report, ":line %d:%"IVdf":", CopLINE(PL_curcop),
197 if (s - PL_bufptr > 0)
198 sv_catpvn(report, PL_bufptr, s - PL_bufptr);
200 if (PL_oldbufptr && *PL_oldbufptr)
201 sv_catpv(report, PL_tokenbuf);
203 PerlIO_printf(Perl_debug_log, "### %s\n", SvPV_nolen(report));
212 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
213 * into an OP_ANDASSIGN or OP_ORASSIGN
217 S_ao(pTHX_ int toketype)
219 if (*PL_bufptr == '=') {
221 if (toketype == ANDAND)
222 yylval.ival = OP_ANDASSIGN;
223 else if (toketype == OROR)
224 yylval.ival = OP_ORASSIGN;
232 * When Perl expects an operator and finds something else, no_op
233 * prints the warning. It always prints "<something> found where
234 * operator expected. It prints "Missing semicolon on previous line?"
235 * if the surprise occurs at the start of the line. "do you need to
236 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
237 * where the compiler doesn't know if foo is a method call or a function.
238 * It prints "Missing operator before end of line" if there's nothing
239 * after the missing operator, or "... before <...>" if there is something
240 * after the missing operator.
244 S_no_op(pTHX_ char *what, char *s)
246 char *oldbp = PL_bufptr;
247 bool is_first = (PL_oldbufptr == PL_linestart);
253 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
255 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
256 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
258 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
259 if (t < PL_bufptr && isSPACE(*t))
260 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
261 t - PL_oldoldbufptr, PL_oldoldbufptr);
265 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
272 * Complain about missing quote/regexp/heredoc terminator.
273 * If it's called with (char *)NULL then it cauterizes the line buffer.
274 * If we're in a delimited string and the delimiter is a control
275 * character, it's reformatted into a two-char sequence like ^C.
280 S_missingterm(pTHX_ char *s)
285 char *nl = strrchr(s,'\n');
291 iscntrl(PL_multi_close)
293 PL_multi_close < 32 || PL_multi_close == 127
297 tmpbuf[1] = toCTRL(PL_multi_close);
303 *tmpbuf = PL_multi_close;
307 q = strchr(s,'"') ? '\'' : '"';
308 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
316 Perl_deprecate(pTHX_ char *s)
318 if (ckWARN(WARN_DEPRECATED))
319 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
324 * Deprecate a comma-less variable list.
330 deprecate("comma-less variable list");
334 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
335 * utf16-to-utf8-reversed.
338 #ifdef PERL_CR_FILTER
342 register char *s = SvPVX(sv);
343 register char *e = s + SvCUR(sv);
344 /* outer loop optimized to do nothing if there are no CR-LFs */
346 if (*s++ == '\r' && *s == '\n') {
347 /* hit a CR-LF, need to copy the rest */
348 register char *d = s - 1;
351 if (*s == '\r' && s[1] == '\n')
362 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
364 I32 count = FILTER_READ(idx+1, sv, maxlen);
365 if (count > 0 && !maxlen)
373 * Initialize variables. Uses the Perl save_stack to save its state (for
374 * recursive calls to the parser).
378 Perl_lex_start(pTHX_ SV *line)
383 SAVEI32(PL_lex_dojoin);
384 SAVEI32(PL_lex_brackets);
385 SAVEI32(PL_lex_casemods);
386 SAVEI32(PL_lex_starts);
387 SAVEI32(PL_lex_state);
388 SAVEVPTR(PL_lex_inpat);
389 SAVEI32(PL_lex_inwhat);
390 if (PL_lex_state == LEX_KNOWNEXT) {
391 I32 toke = PL_nexttoke;
392 while (--toke >= 0) {
393 SAVEI32(PL_nexttype[toke]);
394 SAVEVPTR(PL_nextval[toke]);
396 SAVEI32(PL_nexttoke);
398 SAVECOPLINE(PL_curcop);
401 SAVEPPTR(PL_oldbufptr);
402 SAVEPPTR(PL_oldoldbufptr);
403 SAVEPPTR(PL_last_lop);
404 SAVEPPTR(PL_last_uni);
405 SAVEPPTR(PL_linestart);
406 SAVESPTR(PL_linestr);
407 SAVEPPTR(PL_lex_brackstack);
408 SAVEPPTR(PL_lex_casestack);
409 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
410 SAVESPTR(PL_lex_stuff);
411 SAVEI32(PL_lex_defer);
412 SAVEI32(PL_sublex_info.sub_inwhat);
413 SAVESPTR(PL_lex_repl);
415 SAVEINT(PL_lex_expect);
417 PL_lex_state = LEX_NORMAL;
421 New(899, PL_lex_brackstack, 120, char);
422 New(899, PL_lex_casestack, 12, char);
423 SAVEFREEPV(PL_lex_brackstack);
424 SAVEFREEPV(PL_lex_casestack);
426 *PL_lex_casestack = '\0';
429 PL_lex_stuff = Nullsv;
430 PL_lex_repl = Nullsv;
434 PL_sublex_info.sub_inwhat = 0;
436 if (SvREADONLY(PL_linestr))
437 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
438 s = SvPV(PL_linestr, len);
439 if (len && s[len-1] != ';') {
440 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
441 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
442 sv_catpvn(PL_linestr, "\n;", 2);
444 SvTEMP_off(PL_linestr);
445 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
446 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
447 PL_last_lop = PL_last_uni = Nullch;
453 * Finalizer for lexing operations. Must be called when the parser is
454 * done with the lexer.
460 PL_doextract = FALSE;
465 * This subroutine has nothing to do with tilting, whether at windmills
466 * or pinball tables. Its name is short for "increment line". It
467 * increments the current line number in CopLINE(PL_curcop) and checks
468 * to see whether the line starts with a comment of the form
469 * # line 500 "foo.pm"
470 * If so, it sets the current line number and file to the values in the comment.
474 S_incline(pTHX_ char *s)
481 CopLINE_inc(PL_curcop);
484 while (SPACE_OR_TAB(*s)) s++;
485 if (strnEQ(s, "line", 4))
489 if (SPACE_OR_TAB(*s))
493 while (SPACE_OR_TAB(*s)) s++;
499 while (SPACE_OR_TAB(*s))
501 if (*s == '"' && (t = strchr(s+1, '"'))) {
506 for (t = s; !isSPACE(*t); t++) ;
509 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
511 if (*e != '\n' && *e != '\0')
512 return; /* false alarm */
518 Safefree(CopFILE(PL_curcop));
520 SvREFCNT_dec(CopFILEGV(PL_curcop));
522 CopFILE_set(PL_curcop, s);
525 CopLINE_set(PL_curcop, atoi(n)-1);
530 * Called to gobble the appropriate amount and type of whitespace.
531 * Skips comments as well.
535 S_skipspace(pTHX_ register char *s)
537 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
538 while (s < PL_bufend && SPACE_OR_TAB(*s))
544 SSize_t oldprevlen, oldoldprevlen;
545 SSize_t oldloplen = 0, oldunilen = 0;
546 while (s < PL_bufend && isSPACE(*s)) {
547 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
552 if (s < PL_bufend && *s == '#') {
553 while (s < PL_bufend && *s != '\n')
557 if (PL_in_eval && !PL_rsfp) {
564 /* only continue to recharge the buffer if we're at the end
565 * of the buffer, we're not reading from a source filter, and
566 * we're in normal lexing mode
568 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
569 PL_lex_state == LEX_FORMLINE)
572 /* try to recharge the buffer */
573 if ((s = filter_gets(PL_linestr, PL_rsfp,
574 (prevlen = SvCUR(PL_linestr)))) == Nullch)
576 /* end of file. Add on the -p or -n magic */
577 if (PL_minus_n || PL_minus_p) {
578 sv_setpv(PL_linestr,PL_minus_p ?
579 ";}continue{print or die qq(-p destination: $!\\n)" :
581 sv_catpv(PL_linestr,";}");
582 PL_minus_n = PL_minus_p = 0;
585 sv_setpv(PL_linestr,";");
587 /* reset variables for next time we lex */
588 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
590 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
591 PL_last_lop = PL_last_uni = Nullch;
593 /* Close the filehandle. Could be from -P preprocessor,
594 * STDIN, or a regular file. If we were reading code from
595 * STDIN (because the commandline held no -e or filename)
596 * then we don't close it, we reset it so the code can
597 * read from STDIN too.
600 if (PL_preprocess && !PL_in_eval)
601 (void)PerlProc_pclose(PL_rsfp);
602 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
603 PerlIO_clearerr(PL_rsfp);
605 (void)PerlIO_close(PL_rsfp);
610 /* not at end of file, so we only read another line */
611 /* make corresponding updates to old pointers, for yyerror() */
612 oldprevlen = PL_oldbufptr - PL_bufend;
613 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
615 oldunilen = PL_last_uni - PL_bufend;
617 oldloplen = PL_last_lop - PL_bufend;
618 PL_linestart = PL_bufptr = s + prevlen;
619 PL_bufend = s + SvCUR(PL_linestr);
621 PL_oldbufptr = s + oldprevlen;
622 PL_oldoldbufptr = s + oldoldprevlen;
624 PL_last_uni = s + oldunilen;
626 PL_last_lop = s + oldloplen;
629 /* debugger active and we're not compiling the debugger code,
630 * so store the line into the debugger's array of lines
632 if (PERLDB_LINE && PL_curstash != PL_debstash) {
633 SV *sv = NEWSV(85,0);
635 sv_upgrade(sv, SVt_PVMG);
636 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
639 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
646 * Check the unary operators to ensure there's no ambiguity in how they're
647 * used. An ambiguous piece of code would be:
649 * This doesn't mean rand() + 5. Because rand() is a unary operator,
650 * the +5 is its argument.
659 if (PL_oldoldbufptr != PL_last_uni)
661 while (isSPACE(*PL_last_uni))
663 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
664 if ((t = strchr(s, '(')) && t < PL_bufptr)
666 if (ckWARN_d(WARN_AMBIGUOUS)){
669 Perl_warner(aTHX_ WARN_AMBIGUOUS,
670 "Warning: Use of \"%s\" without parens is ambiguous",
676 /* workaround to replace the UNI() macro with a function. Only the
677 * hints/uts.sh file mentions this. Other comments elsewhere in the
678 * source indicate Microport Unix might need it too.
684 #define UNI(f) return uni(f,s)
687 S_uni(pTHX_ I32 f, char *s)
692 PL_last_uni = PL_oldbufptr;
703 #endif /* CRIPPLED_CC */
706 * LOP : macro to build a list operator. Its behaviour has been replaced
707 * with a subroutine, S_lop() for which LOP is just another name.
710 #define LOP(f,x) return lop(f,x,s)
714 * Build a list operator (or something that might be one). The rules:
715 * - if we have a next token, then it's a list operator [why?]
716 * - if the next thing is an opening paren, then it's a function
717 * - else it's a list operator
721 S_lop(pTHX_ I32 f, int x, char *s)
728 PL_last_lop = PL_oldbufptr;
743 * When the lexer realizes it knows the next token (for instance,
744 * it is reordering tokens for the parser) then it can call S_force_next
745 * to know what token to return the next time the lexer is called. Caller
746 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
747 * handles the token correctly.
751 S_force_next(pTHX_ I32 type)
753 PL_nexttype[PL_nexttoke] = type;
755 if (PL_lex_state != LEX_KNOWNEXT) {
756 PL_lex_defer = PL_lex_state;
757 PL_lex_expect = PL_expect;
758 PL_lex_state = LEX_KNOWNEXT;
764 * When the lexer knows the next thing is a word (for instance, it has
765 * just seen -> and it knows that the next char is a word char, then
766 * it calls S_force_word to stick the next word into the PL_next lookahead.
769 * char *start : buffer position (must be within PL_linestr)
770 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
771 * int check_keyword : if true, Perl checks to make sure the word isn't
772 * a keyword (do this if the word is a label, e.g. goto FOO)
773 * int allow_pack : if true, : characters will also be allowed (require,
775 * int allow_initial_tick : used by the "sub" lexer only.
779 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
784 start = skipspace(start);
786 if (isIDFIRST_lazy_if(s,UTF) ||
787 (allow_pack && *s == ':') ||
788 (allow_initial_tick && *s == '\'') )
790 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
791 if (check_keyword && keyword(PL_tokenbuf, len))
793 if (token == METHOD) {
798 PL_expect = XOPERATOR;
801 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
802 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
810 * Called when the lexer wants $foo *foo &foo etc, but the program
811 * text only contains the "foo" portion. The first argument is a pointer
812 * to the "foo", and the second argument is the type symbol to prefix.
813 * Forces the next token to be a "WORD".
814 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
818 S_force_ident(pTHX_ register char *s, int kind)
821 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
822 PL_nextval[PL_nexttoke].opval = o;
825 o->op_private = OPpCONST_ENTERED;
826 /* XXX see note in pp_entereval() for why we forgo typo
827 warnings if the symbol must be introduced in an eval.
829 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
830 kind == '$' ? SVt_PV :
831 kind == '@' ? SVt_PVAV :
832 kind == '%' ? SVt_PVHV :
840 Perl_str_to_version(pTHX_ SV *sv)
845 char *start = SvPVx(sv,len);
846 bool utf = SvUTF8(sv) ? TRUE : FALSE;
847 char *end = start + len;
848 while (start < end) {
852 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
857 retval += ((NV)n)/nshift;
866 * Forces the next token to be a version number.
867 * If the next token appears to be an invalid version number, (e.g. "v2b"),
868 * and if "guessing" is TRUE, then no new token is created (and the caller
869 * must use an alternative parsing method).
873 S_force_version(pTHX_ char *s, int guessing)
875 OP *version = Nullop;
884 while (isDIGIT(*d) || *d == '_' || *d == '.')
886 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
888 s = scan_num(s, &yylval);
889 version = yylval.opval;
890 ver = cSVOPx(version)->op_sv;
891 if (SvPOK(ver) && !SvNIOK(ver)) {
892 (void)SvUPGRADE(ver, SVt_PVNV);
893 SvNVX(ver) = str_to_version(ver);
894 SvNOK_on(ver); /* hint that it is a version */
901 /* NOTE: The parser sees the package name and the VERSION swapped */
902 PL_nextval[PL_nexttoke].opval = version;
910 * Tokenize a quoted string passed in as an SV. It finds the next
911 * chunk, up to end of string or a backslash. It may make a new
912 * SV containing that chunk (if HINT_NEW_STRING is on). It also
917 S_tokeq(pTHX_ SV *sv)
928 s = SvPV_force(sv, len);
929 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
932 while (s < send && *s != '\\')
937 if ( PL_hints & HINT_NEW_STRING ) {
938 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
944 if (s + 1 < send && (s[1] == '\\'))
945 s++; /* all that, just for this */
950 SvCUR_set(sv, d - SvPVX(sv));
952 if ( PL_hints & HINT_NEW_STRING )
953 return new_constant(NULL, 0, "q", sv, pv, "q");
958 * Now come three functions related to double-quote context,
959 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
960 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
961 * interact with PL_lex_state, and create fake ( ... ) argument lists
962 * to handle functions and concatenation.
963 * They assume that whoever calls them will be setting up a fake
964 * join call, because each subthing puts a ',' after it. This lets
967 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
969 * (I'm not sure whether the spurious commas at the end of lcfirst's
970 * arguments and join's arguments are created or not).
975 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
977 * Pattern matching will set PL_lex_op to the pattern-matching op to
978 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
980 * OP_CONST and OP_READLINE are easy--just make the new op and return.
982 * Everything else becomes a FUNC.
984 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
985 * had an OP_CONST or OP_READLINE). This just sets us up for a
986 * call to S_sublex_push().
992 register I32 op_type = yylval.ival;
994 if (op_type == OP_NULL) {
995 yylval.opval = PL_lex_op;
999 if (op_type == OP_CONST || op_type == OP_READLINE) {
1000 SV *sv = tokeq(PL_lex_stuff);
1002 if (SvTYPE(sv) == SVt_PVIV) {
1003 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
1009 nsv = newSVpvn(p, len);
1015 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
1016 PL_lex_stuff = Nullsv;
1020 PL_sublex_info.super_state = PL_lex_state;
1021 PL_sublex_info.sub_inwhat = op_type;
1022 PL_sublex_info.sub_op = PL_lex_op;
1023 PL_lex_state = LEX_INTERPPUSH;
1027 yylval.opval = PL_lex_op;
1037 * Create a new scope to save the lexing state. The scope will be
1038 * ended in S_sublex_done. Returns a '(', starting the function arguments
1039 * to the uc, lc, etc. found before.
1040 * Sets PL_lex_state to LEX_INTERPCONCAT.
1048 PL_lex_state = PL_sublex_info.super_state;
1049 SAVEI32(PL_lex_dojoin);
1050 SAVEI32(PL_lex_brackets);
1051 SAVEI32(PL_lex_casemods);
1052 SAVEI32(PL_lex_starts);
1053 SAVEI32(PL_lex_state);
1054 SAVEVPTR(PL_lex_inpat);
1055 SAVEI32(PL_lex_inwhat);
1056 SAVECOPLINE(PL_curcop);
1057 SAVEPPTR(PL_bufptr);
1058 SAVEPPTR(PL_bufend);
1059 SAVEPPTR(PL_oldbufptr);
1060 SAVEPPTR(PL_oldoldbufptr);
1061 SAVEPPTR(PL_last_lop);
1062 SAVEPPTR(PL_last_uni);
1063 SAVEPPTR(PL_linestart);
1064 SAVESPTR(PL_linestr);
1065 SAVEPPTR(PL_lex_brackstack);
1066 SAVEPPTR(PL_lex_casestack);
1068 PL_linestr = PL_lex_stuff;
1069 PL_lex_stuff = Nullsv;
1071 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1072 = SvPVX(PL_linestr);
1073 PL_bufend += SvCUR(PL_linestr);
1074 PL_last_lop = PL_last_uni = Nullch;
1075 SAVEFREESV(PL_linestr);
1077 PL_lex_dojoin = FALSE;
1078 PL_lex_brackets = 0;
1079 New(899, PL_lex_brackstack, 120, char);
1080 New(899, PL_lex_casestack, 12, char);
1081 SAVEFREEPV(PL_lex_brackstack);
1082 SAVEFREEPV(PL_lex_casestack);
1083 PL_lex_casemods = 0;
1084 *PL_lex_casestack = '\0';
1086 PL_lex_state = LEX_INTERPCONCAT;
1087 CopLINE_set(PL_curcop, PL_multi_start);
1089 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1090 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1091 PL_lex_inpat = PL_sublex_info.sub_op;
1093 PL_lex_inpat = Nullop;
1100 * Restores lexer state after a S_sublex_push.
1106 if (!PL_lex_starts++) {
1107 SV *sv = newSVpvn("",0);
1108 if (SvUTF8(PL_linestr))
1110 PL_expect = XOPERATOR;
1111 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1115 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1116 PL_lex_state = LEX_INTERPCASEMOD;
1120 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1121 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1122 PL_linestr = PL_lex_repl;
1124 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1125 PL_bufend += SvCUR(PL_linestr);
1126 PL_last_lop = PL_last_uni = Nullch;
1127 SAVEFREESV(PL_linestr);
1128 PL_lex_dojoin = FALSE;
1129 PL_lex_brackets = 0;
1130 PL_lex_casemods = 0;
1131 *PL_lex_casestack = '\0';
1133 if (SvEVALED(PL_lex_repl)) {
1134 PL_lex_state = LEX_INTERPNORMAL;
1136 /* we don't clear PL_lex_repl here, so that we can check later
1137 whether this is an evalled subst; that means we rely on the
1138 logic to ensure sublex_done() is called again only via the
1139 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1142 PL_lex_state = LEX_INTERPCONCAT;
1143 PL_lex_repl = Nullsv;
1149 PL_bufend = SvPVX(PL_linestr);
1150 PL_bufend += SvCUR(PL_linestr);
1151 PL_expect = XOPERATOR;
1152 PL_sublex_info.sub_inwhat = 0;
1160 Extracts a pattern, double-quoted string, or transliteration. This
1163 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1164 processing a pattern (PL_lex_inpat is true), a transliteration
1165 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1167 Returns a pointer to the character scanned up to. Iff this is
1168 advanced from the start pointer supplied (ie if anything was
1169 successfully parsed), will leave an OP for the substring scanned
1170 in yylval. Caller must intuit reason for not parsing further
1171 by looking at the next characters herself.
1175 double-quoted style: \r and \n
1176 regexp special ones: \D \s
1178 backrefs: \1 (deprecated in substitution replacements)
1179 case and quoting: \U \Q \E
1180 stops on @ and $, but not for $ as tail anchor
1182 In transliterations:
1183 characters are VERY literal, except for - not at the start or end
1184 of the string, which indicates a range. scan_const expands the
1185 range to the full set of intermediate characters.
1187 In double-quoted strings:
1189 double-quoted style: \r and \n
1191 backrefs: \1 (deprecated)
1192 case and quoting: \U \Q \E
1195 scan_const does *not* construct ops to handle interpolated strings.
1196 It stops processing as soon as it finds an embedded $ or @ variable
1197 and leaves it to the caller to work out what's going on.
1199 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1201 $ in pattern could be $foo or could be tail anchor. Assumption:
1202 it's a tail anchor if $ is the last thing in the string, or if it's
1203 followed by one of ")| \n\t"
1205 \1 (backreferences) are turned into $1
1207 The structure of the code is
1208 while (there's a character to process) {
1209 handle transliteration ranges
1210 skip regexp comments
1211 skip # initiated comments in //x patterns
1212 check for embedded @foo
1213 check for embedded scalars
1215 leave intact backslashes from leave (below)
1216 deprecate \1 in strings and sub replacements
1217 handle string-changing backslashes \l \U \Q \E, etc.
1218 switch (what was escaped) {
1219 handle - in a transliteration (becomes a literal -)
1220 handle \132 octal characters
1221 handle 0x15 hex characters
1222 handle \cV (control V)
1223 handle printf backslashes (\f, \r, \n, etc)
1225 } (end if backslash)
1226 } (end while character to read)
1231 S_scan_const(pTHX_ char *start)
1233 register char *send = PL_bufend; /* end of the constant */
1234 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1235 register char *s = start; /* start of the constant */
1236 register char *d = SvPVX(sv); /* destination for copies */
1237 bool dorange = FALSE; /* are we in a translit range? */
1238 bool didrange = FALSE; /* did we just finish a range? */
1239 I32 has_utf8 = FALSE; /* Output constant is UTF8 */
1240 I32 this_utf8 = UTF; /* The source string is assumed to be UTF8 */
1243 const char *leaveit = /* set of acceptably-backslashed characters */
1245 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1248 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1249 /* If we are doing a trans and we know we want UTF8 set expectation */
1250 has_utf8 = PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF);
1251 this_utf8 = PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1255 while (s < send || dorange) {
1256 /* get transliterations out of the way (they're most literal) */
1257 if (PL_lex_inwhat == OP_TRANS) {
1258 /* expand a range A-Z to the full set of characters. AIE! */
1260 I32 i; /* current expanded character */
1261 I32 min; /* first character in range */
1262 I32 max; /* last character in range */
1265 char *c = (char*)utf8_hop((U8*)d, -1);
1269 *c = (char)UTF_TO_NATIVE(0xff);
1270 /* mark the range as done, and continue */
1276 i = d - SvPVX(sv); /* remember current offset */
1277 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1278 d = SvPVX(sv) + i; /* refresh d after realloc */
1279 d -= 2; /* eat the first char and the - */
1281 min = (U8)*d; /* first char in range */
1282 max = (U8)d[1]; /* last char in range */
1286 "Invalid [] range \"%c-%c\" in transliteration operator",
1287 (char)min, (char)max);
1291 if ((isLOWER(min) && isLOWER(max)) ||
1292 (isUPPER(min) && isUPPER(max))) {
1294 for (i = min; i <= max; i++)
1296 *d++ = NATIVE_TO_NEED(has_utf8,i);
1298 for (i = min; i <= max; i++)
1300 *d++ = NATIVE_TO_NEED(has_utf8,i);
1305 for (i = min; i <= max; i++)
1308 /* mark the range as done, and continue */
1314 /* range begins (ignore - as first or last char) */
1315 else if (*s == '-' && s+1 < send && s != start) {
1317 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
1320 *d++ = (char)UTF_TO_NATIVE(0xff); /* use illegal utf8 byte--see pmtrans */
1332 /* if we get here, we're not doing a transliteration */
1334 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1335 except for the last char, which will be done separately. */
1336 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1338 while (s < send && *s != ')')
1339 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1341 else if (s[2] == '{' /* This should match regcomp.c */
1342 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1345 char *regparse = s + (s[2] == '{' ? 3 : 4);
1348 while (count && (c = *regparse)) {
1349 if (c == '\\' && regparse[1])
1357 if (*regparse != ')') {
1358 regparse--; /* Leave one char for continuation. */
1359 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1361 while (s < regparse)
1362 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1366 /* likewise skip #-initiated comments in //x patterns */
1367 else if (*s == '#' && PL_lex_inpat &&
1368 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1369 while (s+1 < send && *s != '\n')
1370 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1373 /* check for embedded arrays
1374 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1376 else if (*s == '@' && s[1]
1377 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
1380 /* check for embedded scalars. only stop if we're sure it's a
1383 else if (*s == '$') {
1384 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1386 if (s + 1 < send && !strchr("()| \r\n\t", s[1]))
1387 break; /* in regexp, $ might be tail anchor */
1390 /* End of else if chain - OP_TRANS rejoin rest */
1393 if (*s == '\\' && s+1 < send) {
1396 /* some backslashes we leave behind */
1397 if (*leaveit && *s && strchr(leaveit, *s)) {
1398 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
1399 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1403 /* deprecate \1 in strings and substitution replacements */
1404 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1405 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1407 if (ckWARN(WARN_SYNTAX))
1408 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1413 /* string-change backslash escapes */
1414 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1419 /* if we get here, it's either a quoted -, or a digit */
1422 /* quoted - in transliterations */
1424 if (PL_lex_inwhat == OP_TRANS) {
1431 if (ckWARN(WARN_MISC) && isALNUM(*s))
1432 Perl_warner(aTHX_ WARN_MISC,
1433 "Unrecognized escape \\%c passed through",
1435 /* default action is to copy the quoted character */
1436 goto default_action;
1439 /* \132 indicates an octal constant */
1440 case '0': case '1': case '2': case '3':
1441 case '4': case '5': case '6': case '7':
1445 uv = grok_oct(s, &len, &flags, NULL);
1448 goto NUM_ESCAPE_INSERT;
1450 /* \x24 indicates a hex constant */
1454 char* e = strchr(s, '}');
1455 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
1456 PERL_SCAN_DISALLOW_PREFIX;
1461 yyerror("Missing right brace on \\x{}");
1465 uv = grok_hex(s, &len, &flags, NULL);
1471 I32 flags = PERL_SCAN_DISALLOW_PREFIX;
1472 uv = grok_hex(s, &len, &flags, NULL);
1478 /* Insert oct or hex escaped character.
1479 * There will always enough room in sv since such
1480 * escapes will be longer than any UTF-8 sequence
1481 * they can end up as. */
1483 /* We need to map to chars to ASCII before doing the tests
1486 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(uv))) {
1487 if (!has_utf8 && uv > 255) {
1488 /* Might need to recode whatever we have
1489 * accumulated so far if it contains any
1492 * (Can't we keep track of that and avoid
1493 * this rescan? --jhi)
1497 for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) {
1498 if (!NATIVE_IS_INVARIANT(*c)) {
1503 STRLEN offset = d - SvPVX(sv);
1505 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
1509 while (src >= (U8 *)SvPVX(sv)) {
1510 if (!NATIVE_IS_INVARIANT(*src)) {
1511 U8 ch = NATIVE_TO_ASCII(*src);
1512 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1513 *dst-- = UTF8_EIGHT_BIT_HI(ch);
1523 if (has_utf8 || uv > 255) {
1524 d = (char*)uvchr_to_utf8((U8*)d, uv);
1526 if (PL_lex_inwhat == OP_TRANS &&
1527 PL_sublex_info.sub_op) {
1528 PL_sublex_info.sub_op->op_private |=
1529 (PL_lex_repl ? OPpTRANS_FROM_UTF
1542 /* \N{LATIN SMALL LETTER A} is a named character */
1546 char* e = strchr(s, '}');
1552 yyerror("Missing right brace on \\N{}");
1556 res = newSVpvn(s + 1, e - s - 1);
1557 res = new_constant( Nullch, 0, "charnames",
1558 res, Nullsv, "\\N{...}" );
1560 sv_utf8_upgrade(res);
1561 str = SvPV(res,len);
1562 if (!has_utf8 && SvUTF8(res)) {
1563 char *ostart = SvPVX(sv);
1564 SvCUR_set(sv, d - ostart);
1567 sv_utf8_upgrade(sv);
1568 /* this just broke our allocation above... */
1569 SvGROW(sv, send - start);
1570 d = SvPVX(sv) + SvCUR(sv);
1573 if (len > e - s + 4) { /* I _guess_ 4 is \N{} --jhi */
1574 char *odest = SvPVX(sv);
1576 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
1577 d = SvPVX(sv) + (d - odest);
1579 Copy(str, d, len, char);
1586 yyerror("Missing braces on \\N{}");
1589 /* \c is a control character */
1598 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
1602 /* printf-style backslashes, formfeeds, newlines, etc */
1604 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
1607 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
1610 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
1613 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
1616 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
1619 *d++ = ASCII_TO_NEED(has_utf8,'\033');
1622 *d++ = ASCII_TO_NEED(has_utf8,'\007');
1628 } /* end if (backslash) */
1631 /* If we started with encoded form, or already know we want it
1632 and then encode the next character */
1633 if ((has_utf8 || this_utf8) && !NATIVE_IS_INVARIANT((U8)(*s))) {
1635 UV uv = (this_utf8) ? utf8n_to_uvchr((U8*)s, send - s, &len, 0) : (UV) ((U8) *s);
1636 STRLEN need = UNISKIP(NATIVE_TO_UNI(uv));
1639 /* encoded value larger than old, need extra space (NOTE: SvCUR() not set here) */
1640 STRLEN off = d - SvPVX(sv);
1641 d = SvGROW(sv, SvLEN(sv) + (need-len)) + off;
1643 d = (char*)uvchr_to_utf8((U8*)d, uv);
1647 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1649 } /* while loop to process each character */
1651 /* terminate the string and set up the sv */
1653 SvCUR_set(sv, d - SvPVX(sv));
1654 if (SvCUR(sv) >= SvLEN(sv))
1655 Perl_croak(aTHX_ "panic: constant overflowed allocated space");
1658 if (PL_encoding && !has_utf8) {
1659 Perl_sv_recode_to_utf8(aTHX_ sv, PL_encoding);
1664 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1665 PL_sublex_info.sub_op->op_private |=
1666 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1670 /* shrink the sv if we allocated more than we used */
1671 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1672 SvLEN_set(sv, SvCUR(sv) + 1);
1673 Renew(SvPVX(sv), SvLEN(sv), char);
1676 /* return the substring (via yylval) only if we parsed anything */
1677 if (s > PL_bufptr) {
1678 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1679 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1681 ( PL_lex_inwhat == OP_TRANS
1683 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1686 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1693 * Returns TRUE if there's more to the expression (e.g., a subscript),
1696 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1698 * ->[ and ->{ return TRUE
1699 * { and [ outside a pattern are always subscripts, so return TRUE
1700 * if we're outside a pattern and it's not { or [, then return FALSE
1701 * if we're in a pattern and the first char is a {
1702 * {4,5} (any digits around the comma) returns FALSE
1703 * if we're in a pattern and the first char is a [
1705 * [SOMETHING] has a funky algorithm to decide whether it's a
1706 * character class or not. It has to deal with things like
1707 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1708 * anything else returns TRUE
1711 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1714 S_intuit_more(pTHX_ register char *s)
1716 if (PL_lex_brackets)
1718 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1720 if (*s != '{' && *s != '[')
1725 /* In a pattern, so maybe we have {n,m}. */
1742 /* On the other hand, maybe we have a character class */
1745 if (*s == ']' || *s == '^')
1748 /* this is terrifying, and it works */
1749 int weight = 2; /* let's weigh the evidence */
1751 unsigned char un_char = 255, last_un_char;
1752 char *send = strchr(s,']');
1753 char tmpbuf[sizeof PL_tokenbuf * 4];
1755 if (!send) /* has to be an expression */
1758 Zero(seen,256,char);
1761 else if (isDIGIT(*s)) {
1763 if (isDIGIT(s[1]) && s[2] == ']')
1769 for (; s < send; s++) {
1770 last_un_char = un_char;
1771 un_char = (unsigned char)*s;
1776 weight -= seen[un_char] * 10;
1777 if (isALNUM_lazy_if(s+1,UTF)) {
1778 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1779 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1784 else if (*s == '$' && s[1] &&
1785 strchr("[#!%*<>()-=",s[1])) {
1786 if (/*{*/ strchr("])} =",s[2]))
1795 if (strchr("wds]",s[1]))
1797 else if (seen['\''] || seen['"'])
1799 else if (strchr("rnftbxcav",s[1]))
1801 else if (isDIGIT(s[1])) {
1803 while (s[1] && isDIGIT(s[1]))
1813 if (strchr("aA01! ",last_un_char))
1815 if (strchr("zZ79~",s[1]))
1817 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1818 weight -= 5; /* cope with negative subscript */
1821 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1822 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1827 if (keyword(tmpbuf, d - tmpbuf))
1830 if (un_char == last_un_char + 1)
1832 weight -= seen[un_char];
1837 if (weight >= 0) /* probably a character class */
1847 * Does all the checking to disambiguate
1849 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1850 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1852 * First argument is the stuff after the first token, e.g. "bar".
1854 * Not a method if bar is a filehandle.
1855 * Not a method if foo is a subroutine prototyped to take a filehandle.
1856 * Not a method if it's really "Foo $bar"
1857 * Method if it's "foo $bar"
1858 * Not a method if it's really "print foo $bar"
1859 * Method if it's really "foo package::" (interpreted as package->foo)
1860 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1861 * Not a method if bar is a filehandle or package, but is quoted with
1866 S_intuit_method(pTHX_ char *start, GV *gv)
1868 char *s = start + (*start == '$');
1869 char tmpbuf[sizeof PL_tokenbuf];
1877 if ((cv = GvCVu(gv))) {
1878 char *proto = SvPVX(cv);
1888 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1889 /* start is the beginning of the possible filehandle/object,
1890 * and s is the end of it
1891 * tmpbuf is a copy of it
1894 if (*start == '$') {
1895 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1900 return *s == '(' ? FUNCMETH : METHOD;
1902 if (!keyword(tmpbuf, len)) {
1903 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1908 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1909 if (indirgv && GvCVu(indirgv))
1911 /* filehandle or package name makes it a method */
1912 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1914 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1915 return 0; /* no assumptions -- "=>" quotes bearword */
1917 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1918 newSVpvn(tmpbuf,len));
1919 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1923 return *s == '(' ? FUNCMETH : METHOD;
1931 * Return a string of Perl code to load the debugger. If PERL5DB
1932 * is set, it will return the contents of that, otherwise a
1933 * compile-time require of perl5db.pl.
1940 char *pdb = PerlEnv_getenv("PERL5DB");
1944 SETERRNO(0,SS$_NORMAL);
1945 return "BEGIN { require 'perl5db.pl' }";
1951 /* Encoded script support. filter_add() effectively inserts a
1952 * 'pre-processing' function into the current source input stream.
1953 * Note that the filter function only applies to the current source file
1954 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1956 * The datasv parameter (which may be NULL) can be used to pass
1957 * private data to this instance of the filter. The filter function
1958 * can recover the SV using the FILTER_DATA macro and use it to
1959 * store private buffers and state information.
1961 * The supplied datasv parameter is upgraded to a PVIO type
1962 * and the IoDIRP/IoANY field is used to store the function pointer,
1963 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1964 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1965 * private use must be set using malloc'd pointers.
1969 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1974 if (!PL_rsfp_filters)
1975 PL_rsfp_filters = newAV();
1977 datasv = NEWSV(255,0);
1978 if (!SvUPGRADE(datasv, SVt_PVIO))
1979 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1980 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1981 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1982 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1983 funcp, SvPV_nolen(datasv)));
1984 av_unshift(PL_rsfp_filters, 1);
1985 av_store(PL_rsfp_filters, 0, datasv) ;
1990 /* Delete most recently added instance of this filter function. */
1992 Perl_filter_del(pTHX_ filter_t funcp)
1995 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1996 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1998 /* if filter is on top of stack (usual case) just pop it off */
1999 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
2000 if (IoANY(datasv) == (void *)funcp) {
2001 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
2002 IoANY(datasv) = (void *)NULL;
2003 sv_free(av_pop(PL_rsfp_filters));
2007 /* we need to search for the correct entry and clear it */
2008 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
2012 /* Invoke the n'th filter function for the current rsfp. */
2014 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
2017 /* 0 = read one text line */
2022 if (!PL_rsfp_filters)
2024 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
2025 /* Provide a default input filter to make life easy. */
2026 /* Note that we append to the line. This is handy. */
2027 DEBUG_P(PerlIO_printf(Perl_debug_log,
2028 "filter_read %d: from rsfp\n", idx));
2032 int old_len = SvCUR(buf_sv) ;
2034 /* ensure buf_sv is large enough */
2035 SvGROW(buf_sv, old_len + maxlen) ;
2036 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2037 if (PerlIO_error(PL_rsfp))
2038 return -1; /* error */
2040 return 0 ; /* end of file */
2042 SvCUR_set(buf_sv, old_len + len) ;
2045 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2046 if (PerlIO_error(PL_rsfp))
2047 return -1; /* error */
2049 return 0 ; /* end of file */
2052 return SvCUR(buf_sv);
2054 /* Skip this filter slot if filter has been deleted */
2055 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
2056 DEBUG_P(PerlIO_printf(Perl_debug_log,
2057 "filter_read %d: skipped (filter deleted)\n",
2059 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2061 /* Get function pointer hidden within datasv */
2062 funcp = (filter_t)IoANY(datasv);
2063 DEBUG_P(PerlIO_printf(Perl_debug_log,
2064 "filter_read %d: via function %p (%s)\n",
2065 idx, funcp, SvPV_nolen(datasv)));
2066 /* Call function. The function is expected to */
2067 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2068 /* Return: <0:error, =0:eof, >0:not eof */
2069 return (*funcp)(aTHX_ idx, buf_sv, maxlen);
2073 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2075 #ifdef PERL_CR_FILTER
2076 if (!PL_rsfp_filters) {
2077 filter_add(S_cr_textfilter,NULL);
2080 if (PL_rsfp_filters) {
2083 SvCUR_set(sv, 0); /* start with empty line */
2084 if (FILTER_READ(0, sv, 0) > 0)
2085 return ( SvPVX(sv) ) ;
2090 return (sv_gets(sv, fp, append));
2094 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2098 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2102 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2103 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2105 return GvHV(gv); /* Foo:: */
2108 /* use constant CLASS => 'MyClass' */
2109 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2111 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2112 pkgname = SvPV_nolen(sv);
2116 return gv_stashpv(pkgname, FALSE);
2120 static char* exp_name[] =
2121 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2122 "ATTRTERM", "TERMBLOCK"
2129 Works out what to call the token just pulled out of the input
2130 stream. The yacc parser takes care of taking the ops we return and
2131 stitching them into a tree.
2137 if read an identifier
2138 if we're in a my declaration
2139 croak if they tried to say my($foo::bar)
2140 build the ops for a my() declaration
2141 if it's an access to a my() variable
2142 are we in a sort block?
2143 croak if my($a); $a <=> $b
2144 build ops for access to a my() variable
2145 if in a dq string, and they've said @foo and we can't find @foo
2147 build ops for a bareword
2148 if we already built the token before, use it.
2151 #ifdef USE_PURE_BISON
2153 Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
2158 yylval_pointer[yyactlevel] = lvalp;
2159 yychar_pointer[yyactlevel] = lcharp;
2160 if (yyactlevel >= YYMAXLEVEL)
2161 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
2163 r = Perl_yylex(aTHX);
2173 #pragma segment Perl_yylex
2186 /* check if there's an identifier for us to look at */
2187 if (PL_pending_ident)
2188 return S_pending_ident(aTHX);
2190 /* no identifier pending identification */
2192 switch (PL_lex_state) {
2194 case LEX_NORMAL: /* Some compilers will produce faster */
2195 case LEX_INTERPNORMAL: /* code if we comment these out. */
2199 /* when we've already built the next token, just pull it out of the queue */
2202 yylval = PL_nextval[PL_nexttoke];
2204 PL_lex_state = PL_lex_defer;
2205 PL_expect = PL_lex_expect;
2206 PL_lex_defer = LEX_NORMAL;
2208 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2209 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
2210 (IV)PL_nexttype[PL_nexttoke]); });
2212 return(PL_nexttype[PL_nexttoke]);
2214 /* interpolated case modifiers like \L \U, including \Q and \E.
2215 when we get here, PL_bufptr is at the \
2217 case LEX_INTERPCASEMOD:
2219 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2220 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2222 /* handle \E or end of string */
2223 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2227 if (PL_lex_casemods) {
2228 oldmod = PL_lex_casestack[--PL_lex_casemods];
2229 PL_lex_casestack[PL_lex_casemods] = '\0';
2231 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2233 PL_lex_state = LEX_INTERPCONCAT;
2237 if (PL_bufptr != PL_bufend)
2239 PL_lex_state = LEX_INTERPCONCAT;
2243 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2244 "### Saw case modifier at '%s'\n", PL_bufptr); });
2246 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2247 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2248 if (strchr("LU", *s) &&
2249 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2251 PL_lex_casestack[--PL_lex_casemods] = '\0';
2254 if (PL_lex_casemods > 10) {
2255 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2256 if (newlb != PL_lex_casestack) {
2258 PL_lex_casestack = newlb;
2261 PL_lex_casestack[PL_lex_casemods++] = *s;
2262 PL_lex_casestack[PL_lex_casemods] = '\0';
2263 PL_lex_state = LEX_INTERPCONCAT;
2264 PL_nextval[PL_nexttoke].ival = 0;
2267 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2269 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2271 PL_nextval[PL_nexttoke].ival = OP_LC;
2273 PL_nextval[PL_nexttoke].ival = OP_UC;
2275 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2277 Perl_croak(aTHX_ "panic: yylex");
2280 if (PL_lex_starts) {
2289 case LEX_INTERPPUSH:
2290 return sublex_push();
2292 case LEX_INTERPSTART:
2293 if (PL_bufptr == PL_bufend)
2294 return sublex_done();
2295 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2296 "### Interpolated variable at '%s'\n", PL_bufptr); });
2298 PL_lex_dojoin = (*PL_bufptr == '@');
2299 PL_lex_state = LEX_INTERPNORMAL;
2300 if (PL_lex_dojoin) {
2301 PL_nextval[PL_nexttoke].ival = 0;
2303 #ifdef USE_5005THREADS
2304 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2305 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2306 force_next(PRIVATEREF);
2308 force_ident("\"", '$');
2309 #endif /* USE_5005THREADS */
2310 PL_nextval[PL_nexttoke].ival = 0;
2312 PL_nextval[PL_nexttoke].ival = 0;
2314 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2317 if (PL_lex_starts++) {
2323 case LEX_INTERPENDMAYBE:
2324 if (intuit_more(PL_bufptr)) {
2325 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2331 if (PL_lex_dojoin) {
2332 PL_lex_dojoin = FALSE;
2333 PL_lex_state = LEX_INTERPCONCAT;
2336 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2337 && SvEVALED(PL_lex_repl))
2339 if (PL_bufptr != PL_bufend)
2340 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2341 PL_lex_repl = Nullsv;
2344 case LEX_INTERPCONCAT:
2346 if (PL_lex_brackets)
2347 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2349 if (PL_bufptr == PL_bufend)
2350 return sublex_done();
2352 if (SvIVX(PL_linestr) == '\'') {
2353 SV *sv = newSVsv(PL_linestr);
2356 else if ( PL_hints & HINT_NEW_RE )
2357 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2358 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2362 s = scan_const(PL_bufptr);
2364 PL_lex_state = LEX_INTERPCASEMOD;
2366 PL_lex_state = LEX_INTERPSTART;
2369 if (s != PL_bufptr) {
2370 PL_nextval[PL_nexttoke] = yylval;
2373 if (PL_lex_starts++)
2383 PL_lex_state = LEX_NORMAL;
2384 s = scan_formline(PL_bufptr);
2385 if (!PL_lex_formbrack)
2391 PL_oldoldbufptr = PL_oldbufptr;
2394 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2395 exp_name[PL_expect], s);
2401 if (isIDFIRST_lazy_if(s,UTF))
2403 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2406 goto fake_eof; /* emulate EOF on ^D or ^Z */
2411 if (PL_lex_brackets)
2412 yyerror("Missing right curly or square bracket");
2413 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2414 "### Tokener got EOF\n");
2418 if (s++ < PL_bufend)
2419 goto retry; /* ignore stray nulls */
2422 if (!PL_in_eval && !PL_preambled) {
2423 PL_preambled = TRUE;
2424 sv_setpv(PL_linestr,incl_perldb());
2425 if (SvCUR(PL_linestr))
2426 sv_catpv(PL_linestr,";");
2428 while(AvFILLp(PL_preambleav) >= 0) {
2429 SV *tmpsv = av_shift(PL_preambleav);
2430 sv_catsv(PL_linestr, tmpsv);
2431 sv_catpv(PL_linestr, ";");
2434 sv_free((SV*)PL_preambleav);
2435 PL_preambleav = NULL;
2437 if (PL_minus_n || PL_minus_p) {
2438 sv_catpv(PL_linestr, "LINE: while (<>) {");
2440 sv_catpv(PL_linestr,"chomp;");
2443 if (strchr("/'\"", *PL_splitstr)
2444 && strchr(PL_splitstr + 1, *PL_splitstr))
2445 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2448 s = "'~#\200\1'"; /* surely one char is unused...*/
2449 while (s[1] && strchr(PL_splitstr, *s)) s++;
2451 Perl_sv_catpvf(aTHX_ PL_linestr, "our @F=split(%s%c",
2452 "q" + (delim == '\''), delim);
2453 for (s = PL_splitstr; *s; s++) {
2455 sv_catpvn(PL_linestr, "\\", 1);
2456 sv_catpvn(PL_linestr, s, 1);
2458 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2462 sv_catpv(PL_linestr,"our @F=split(' ');");
2465 sv_catpv(PL_linestr, "\n");
2466 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2467 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2468 PL_last_lop = PL_last_uni = Nullch;
2469 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2470 SV *sv = NEWSV(85,0);
2472 sv_upgrade(sv, SVt_PVMG);
2473 sv_setsv(sv,PL_linestr);
2476 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2481 bof = PL_rsfp ? TRUE : FALSE;
2482 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2485 if (PL_preprocess && !PL_in_eval)
2486 (void)PerlProc_pclose(PL_rsfp);
2487 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2488 PerlIO_clearerr(PL_rsfp);
2490 (void)PerlIO_close(PL_rsfp);
2492 PL_doextract = FALSE;
2494 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2495 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2496 sv_catpv(PL_linestr,";}");
2497 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2498 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2499 PL_last_lop = PL_last_uni = Nullch;
2500 PL_minus_n = PL_minus_p = 0;
2503 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2504 PL_last_lop = PL_last_uni = Nullch;
2505 sv_setpv(PL_linestr,"");
2506 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2508 /* if it looks like the start of a BOM, check if it in fact is */
2509 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
2510 #ifdef PERLIO_IS_STDIO
2511 # ifdef __GNU_LIBRARY__
2512 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
2513 # define FTELL_FOR_PIPE_IS_BROKEN
2517 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2518 # define FTELL_FOR_PIPE_IS_BROKEN
2523 #ifdef FTELL_FOR_PIPE_IS_BROKEN
2524 /* This loses the possibility to detect the bof
2525 * situation on perl -P when the libc5 is being used.
2526 * Workaround? Maybe attach some extra state to PL_rsfp?
2529 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2531 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2534 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2535 s = swallow_bom((U8*)s);
2539 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2540 PL_doextract = FALSE;
2542 /* Incest with pod. */
2543 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2544 sv_setpv(PL_linestr, "");
2545 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2546 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2547 PL_last_lop = PL_last_uni = Nullch;
2548 PL_doextract = FALSE;
2552 } while (PL_doextract);
2553 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2554 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2555 SV *sv = NEWSV(85,0);
2557 sv_upgrade(sv, SVt_PVMG);
2558 sv_setsv(sv,PL_linestr);
2561 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2563 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2564 PL_last_lop = PL_last_uni = Nullch;
2565 if (CopLINE(PL_curcop) == 1) {
2566 while (s < PL_bufend && isSPACE(*s))
2568 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2572 if (*s == '#' && *(s+1) == '!')
2574 #ifdef ALTERNATE_SHEBANG
2576 static char as[] = ALTERNATE_SHEBANG;
2577 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2578 d = s + (sizeof(as) - 1);
2580 #endif /* ALTERNATE_SHEBANG */
2589 while (*d && !isSPACE(*d))
2593 #ifdef ARG_ZERO_IS_SCRIPT
2594 if (ipathend > ipath) {
2596 * HP-UX (at least) sets argv[0] to the script name,
2597 * which makes $^X incorrect. And Digital UNIX and Linux,
2598 * at least, set argv[0] to the basename of the Perl
2599 * interpreter. So, having found "#!", we'll set it right.
2601 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV)); /* $^X */
2602 assert(SvPOK(x) || SvGMAGICAL(x));
2603 if (sv_eq(x, CopFILESV(PL_curcop))) {
2604 sv_setpvn(x, ipath, ipathend - ipath);
2607 TAINT_NOT; /* $^X is always tainted, but that's OK */
2609 #endif /* ARG_ZERO_IS_SCRIPT */
2614 d = instr(s,"perl -");
2616 d = instr(s,"perl");
2618 /* avoid getting into infinite loops when shebang
2619 * line contains "Perl" rather than "perl" */
2621 for (d = ipathend-4; d >= ipath; --d) {
2622 if ((*d == 'p' || *d == 'P')
2623 && !ibcmp(d, "perl", 4))
2633 #ifdef ALTERNATE_SHEBANG
2635 * If the ALTERNATE_SHEBANG on this system starts with a
2636 * character that can be part of a Perl expression, then if
2637 * we see it but not "perl", we're probably looking at the
2638 * start of Perl code, not a request to hand off to some
2639 * other interpreter. Similarly, if "perl" is there, but
2640 * not in the first 'word' of the line, we assume the line
2641 * contains the start of the Perl program.
2643 if (d && *s != '#') {
2645 while (*c && !strchr("; \t\r\n\f\v#", *c))
2648 d = Nullch; /* "perl" not in first word; ignore */
2650 *s = '#'; /* Don't try to parse shebang line */
2652 #endif /* ALTERNATE_SHEBANG */
2653 #ifndef MACOS_TRADITIONAL
2658 !instr(s,"indir") &&
2659 instr(PL_origargv[0],"perl"))
2665 while (s < PL_bufend && isSPACE(*s))
2667 if (s < PL_bufend) {
2668 Newz(899,newargv,PL_origargc+3,char*);
2670 while (s < PL_bufend && !isSPACE(*s))
2673 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2676 newargv = PL_origargv;
2678 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
2679 Perl_croak(aTHX_ "Can't exec %s", ipath);
2683 U32 oldpdb = PL_perldb;
2684 bool oldn = PL_minus_n;
2685 bool oldp = PL_minus_p;
2687 while (*d && !isSPACE(*d)) d++;
2688 while (SPACE_OR_TAB(*d)) d++;
2691 bool switches_done = PL_doswitches;
2693 if (*d == 'M' || *d == 'm') {
2695 while (*d && !isSPACE(*d)) d++;
2696 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2699 d = moreswitches(d);
2701 if ((PERLDB_LINE && !oldpdb) ||
2702 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2703 /* if we have already added "LINE: while (<>) {",
2704 we must not do it again */
2706 sv_setpv(PL_linestr, "");
2707 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2708 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2709 PL_last_lop = PL_last_uni = Nullch;
2710 PL_preambled = FALSE;
2712 (void)gv_fetchfile(PL_origfilename);
2715 if (PL_doswitches && !switches_done) {
2716 int argc = PL_origargc;
2717 char **argv = PL_origargv;
2720 } while (argc && argv[0][0] == '-' && argv[0][1]);
2721 init_argv_symbols(argc,argv);
2727 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2729 PL_lex_state = LEX_FORMLINE;
2734 #ifdef PERL_STRICT_CR
2735 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2737 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2739 case ' ': case '\t': case '\f': case 013:
2740 #ifdef MACOS_TRADITIONAL
2747 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2748 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2749 /* handle eval qq[#line 1 "foo"\n ...] */
2750 CopLINE_dec(PL_curcop);
2754 while (s < d && *s != '\n')
2758 else if (s > d) /* Found by Ilya: feed random input to Perl. */
2759 Perl_croak(aTHX_ "panic: input overflow");
2761 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2763 PL_lex_state = LEX_FORMLINE;
2773 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2780 while (s < PL_bufend && SPACE_OR_TAB(*s))
2783 if (strnEQ(s,"=>",2)) {
2784 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2785 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2786 "### Saw unary minus before =>, forcing word '%s'\n", s);
2788 OPERATOR('-'); /* unary minus */
2790 PL_last_uni = PL_oldbufptr;
2792 case 'r': ftst = OP_FTEREAD; break;
2793 case 'w': ftst = OP_FTEWRITE; break;
2794 case 'x': ftst = OP_FTEEXEC; break;
2795 case 'o': ftst = OP_FTEOWNED; break;
2796 case 'R': ftst = OP_FTRREAD; break;
2797 case 'W': ftst = OP_FTRWRITE; break;
2798 case 'X': ftst = OP_FTREXEC; break;
2799 case 'O': ftst = OP_FTROWNED; break;
2800 case 'e': ftst = OP_FTIS; break;
2801 case 'z': ftst = OP_FTZERO; break;
2802 case 's': ftst = OP_FTSIZE; break;
2803 case 'f': ftst = OP_FTFILE; break;
2804 case 'd': ftst = OP_FTDIR; break;
2805 case 'l': ftst = OP_FTLINK; break;
2806 case 'p': ftst = OP_FTPIPE; break;
2807 case 'S': ftst = OP_FTSOCK; break;
2808 case 'u': ftst = OP_FTSUID; break;
2809 case 'g': ftst = OP_FTSGID; break;
2810 case 'k': ftst = OP_FTSVTX; break;
2811 case 'b': ftst = OP_FTBLK; break;
2812 case 'c': ftst = OP_FTCHR; break;
2813 case 't': ftst = OP_FTTTY; break;
2814 case 'T': ftst = OP_FTTEXT; break;
2815 case 'B': ftst = OP_FTBINARY; break;
2816 case 'M': case 'A': case 'C':
2817 gv_fetchpv("\024",TRUE, SVt_PV);
2819 case 'M': ftst = OP_FTMTIME; break;
2820 case 'A': ftst = OP_FTATIME; break;
2821 case 'C': ftst = OP_FTCTIME; break;
2829 PL_last_lop_op = ftst;
2830 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2831 "### Saw file test %c\n", (int)ftst);
2836 /* Assume it was a minus followed by a one-letter named
2837 * subroutine call (or a -bareword), then. */
2838 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2839 "### %c looked like a file test but was not\n",
2848 if (PL_expect == XOPERATOR)
2853 else if (*s == '>') {
2856 if (isIDFIRST_lazy_if(s,UTF)) {
2857 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2865 if (PL_expect == XOPERATOR)
2868 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2870 OPERATOR('-'); /* unary minus */
2877 if (PL_expect == XOPERATOR)
2882 if (PL_expect == XOPERATOR)
2885 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2891 if (PL_expect != XOPERATOR) {
2892 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2893 PL_expect = XOPERATOR;
2894 force_ident(PL_tokenbuf, '*');
2907 if (PL_expect == XOPERATOR) {
2911 PL_tokenbuf[0] = '%';
2912 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2913 if (!PL_tokenbuf[1]) {
2915 yyerror("Final % should be \\% or %name");
2918 PL_pending_ident = '%';
2937 switch (PL_expect) {
2940 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
2942 PL_bufptr = s; /* update in case we back off */
2948 PL_expect = XTERMBLOCK;
2952 while (isIDFIRST_lazy_if(s,UTF)) {
2953 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
2954 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
2955 if (tmp < 0) tmp = -tmp;
2970 d = scan_str(d,TRUE,TRUE);
2972 /* MUST advance bufptr here to avoid bogus
2973 "at end of line" context messages from yyerror().
2975 PL_bufptr = s + len;
2976 yyerror("Unterminated attribute parameter in attribute list");
2979 return 0; /* EOF indicator */
2983 SV *sv = newSVpvn(s, len);
2984 sv_catsv(sv, PL_lex_stuff);
2985 attrs = append_elem(OP_LIST, attrs,
2986 newSVOP(OP_CONST, 0, sv));
2987 SvREFCNT_dec(PL_lex_stuff);
2988 PL_lex_stuff = Nullsv;
2991 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
2992 CvLVALUE_on(PL_compcv);
2993 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
2994 CvLOCKED_on(PL_compcv);
2995 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
2996 CvMETHOD_on(PL_compcv);
2998 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "unique", len))
2999 GvUNIQUE_on(cGVOPx_gv(yylval.opval));
3001 /* After we've set the flags, it could be argued that
3002 we don't need to do the attributes.pm-based setting
3003 process, and shouldn't bother appending recognized
3004 flags. To experiment with that, uncomment the
3005 following "else": */
3007 attrs = append_elem(OP_LIST, attrs,
3008 newSVOP(OP_CONST, 0,
3012 if (*s == ':' && s[1] != ':')
3015 break; /* require real whitespace or :'s */
3017 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
3018 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
3019 char q = ((*s == '\'') ? '"' : '\'');
3020 /* If here for an expression, and parsed no attrs, back off. */
3021 if (tmp == '=' && !attrs) {
3025 /* MUST advance bufptr here to avoid bogus "at end of line"
3026 context messages from yyerror().
3030 yyerror("Unterminated attribute list");
3032 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3040 PL_nextval[PL_nexttoke].opval = attrs;
3048 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3049 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
3065 if (PL_lex_brackets <= 0)
3066 yyerror("Unmatched right square bracket");
3069 if (PL_lex_state == LEX_INTERPNORMAL) {
3070 if (PL_lex_brackets == 0) {
3071 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3072 PL_lex_state = LEX_INTERPEND;
3079 if (PL_lex_brackets > 100) {
3080 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3081 if (newlb != PL_lex_brackstack) {
3083 PL_lex_brackstack = newlb;
3086 switch (PL_expect) {
3088 if (PL_lex_formbrack) {
3092 if (PL_oldoldbufptr == PL_last_lop)
3093 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3095 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3096 OPERATOR(HASHBRACK);
3098 while (s < PL_bufend && SPACE_OR_TAB(*s))
3101 PL_tokenbuf[0] = '\0';
3102 if (d < PL_bufend && *d == '-') {
3103 PL_tokenbuf[0] = '-';
3105 while (d < PL_bufend && SPACE_OR_TAB(*d))
3108 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3109 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3111 while (d < PL_bufend && SPACE_OR_TAB(*d))
3114 char minus = (PL_tokenbuf[0] == '-');
3115 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3123 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3128 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3133 if (PL_oldoldbufptr == PL_last_lop)
3134 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3136 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3139 if (PL_expect == XREF && PL_lex_state == LEX_INTERPNORMAL) {
3141 /* This hack is to get the ${} in the message. */
3143 yyerror("syntax error");
3146 OPERATOR(HASHBRACK);
3148 /* This hack serves to disambiguate a pair of curlies
3149 * as being a block or an anon hash. Normally, expectation
3150 * determines that, but in cases where we're not in a
3151 * position to expect anything in particular (like inside
3152 * eval"") we have to resolve the ambiguity. This code
3153 * covers the case where the first term in the curlies is a
3154 * quoted string. Most other cases need to be explicitly
3155 * disambiguated by prepending a `+' before the opening
3156 * curly in order to force resolution as an anon hash.
3158 * XXX should probably propagate the outer expectation
3159 * into eval"" to rely less on this hack, but that could
3160 * potentially break current behavior of eval"".
3164 if (*s == '\'' || *s == '"' || *s == '`') {
3165 /* common case: get past first string, handling escapes */
3166 for (t++; t < PL_bufend && *t != *s;)
3167 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3171 else if (*s == 'q') {
3174 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3178 char open, close, term;
3181 while (t < PL_bufend && isSPACE(*t))
3185 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3189 for (t++; t < PL_bufend; t++) {
3190 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3192 else if (*t == open)
3196 for (t++; t < PL_bufend; t++) {
3197 if (*t == '\\' && t+1 < PL_bufend)
3199 else if (*t == close && --brackets <= 0)
3201 else if (*t == open)
3207 else if (isALNUM_lazy_if(t,UTF)) {
3209 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3212 while (t < PL_bufend && isSPACE(*t))
3214 /* if comma follows first term, call it an anon hash */
3215 /* XXX it could be a comma expression with loop modifiers */
3216 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3217 || (*t == '=' && t[1] == '>')))
3218 OPERATOR(HASHBRACK);
3219 if (PL_expect == XREF)
3222 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3228 yylval.ival = CopLINE(PL_curcop);
3229 if (isSPACE(*s) || *s == '#')
3230 PL_copline = NOLINE; /* invalidate current command line number */
3235 if (PL_lex_brackets <= 0)
3236 yyerror("Unmatched right curly bracket");
3238 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3239 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3240 PL_lex_formbrack = 0;
3241 if (PL_lex_state == LEX_INTERPNORMAL) {
3242 if (PL_lex_brackets == 0) {
3243 if (PL_expect & XFAKEBRACK) {
3244 PL_expect &= XENUMMASK;
3245 PL_lex_state = LEX_INTERPEND;
3247 return yylex(); /* ignore fake brackets */
3249 if (*s == '-' && s[1] == '>')
3250 PL_lex_state = LEX_INTERPENDMAYBE;
3251 else if (*s != '[' && *s != '{')
3252 PL_lex_state = LEX_INTERPEND;
3255 if (PL_expect & XFAKEBRACK) {
3256 PL_expect &= XENUMMASK;
3258 return yylex(); /* ignore fake brackets */
3268 if (PL_expect == XOPERATOR) {
3269 if (ckWARN(WARN_SEMICOLON)
3270 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3272 CopLINE_dec(PL_curcop);
3273 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3274 CopLINE_inc(PL_curcop);
3279 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3281 PL_expect = XOPERATOR;
3282 force_ident(PL_tokenbuf, '&');
3286 yylval.ival = (OPpENTERSUB_AMPER<<8);
3305 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3306 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3308 if (PL_expect == XSTATE && isALPHA(tmp) &&
3309 (s == PL_linestart+1 || s[-2] == '\n') )
3311 if (PL_in_eval && !PL_rsfp) {
3316 if (strnEQ(s,"=cut",4)) {
3330 PL_doextract = TRUE;
3333 if (PL_lex_brackets < PL_lex_formbrack) {
3335 #ifdef PERL_STRICT_CR
3336 for (t = s; SPACE_OR_TAB(*t); t++) ;
3338 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3340 if (*t == '\n' || *t == '#') {
3358 if (PL_expect != XOPERATOR) {
3359 if (s[1] != '<' && !strchr(s,'>'))
3362 s = scan_heredoc(s);
3364 s = scan_inputsymbol(s);
3365 TERM(sublex_start());
3370 SHop(OP_LEFT_SHIFT);
3384 SHop(OP_RIGHT_SHIFT);
3393 if (PL_expect == XOPERATOR) {
3394 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3397 return ','; /* grandfather non-comma-format format */
3401 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3402 PL_tokenbuf[0] = '@';
3403 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3404 sizeof PL_tokenbuf - 1, FALSE);
3405 if (PL_expect == XOPERATOR)
3406 no_op("Array length", s);
3407 if (!PL_tokenbuf[1])
3409 PL_expect = XOPERATOR;
3410 PL_pending_ident = '#';
3414 PL_tokenbuf[0] = '$';
3415 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3416 sizeof PL_tokenbuf - 1, FALSE);
3417 if (PL_expect == XOPERATOR)
3419 if (!PL_tokenbuf[1]) {
3421 yyerror("Final $ should be \\$ or $name");
3425 /* This kludge not intended to be bulletproof. */
3426 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3427 yylval.opval = newSVOP(OP_CONST, 0,
3428 newSViv(PL_compiling.cop_arybase));
3429 yylval.opval->op_private = OPpCONST_ARYBASE;
3435 if (PL_lex_state == LEX_NORMAL)
3438 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3441 PL_tokenbuf[0] = '@';
3442 if (ckWARN(WARN_SYNTAX)) {
3444 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3447 PL_bufptr = skipspace(PL_bufptr);
3448 while (t < PL_bufend && *t != ']')
3450 Perl_warner(aTHX_ WARN_SYNTAX,
3451 "Multidimensional syntax %.*s not supported",
3452 (t - PL_bufptr) + 1, PL_bufptr);
3456 else if (*s == '{') {
3457 PL_tokenbuf[0] = '%';
3458 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3459 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3461 char tmpbuf[sizeof PL_tokenbuf];
3463 for (t++; isSPACE(*t); t++) ;
3464 if (isIDFIRST_lazy_if(t,UTF)) {
3465 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3466 for (; isSPACE(*t); t++) ;
3467 if (*t == ';' && get_cv(tmpbuf, FALSE))
3468 Perl_warner(aTHX_ WARN_SYNTAX,
3469 "You need to quote \"%s\"", tmpbuf);
3475 PL_expect = XOPERATOR;
3476 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3477 bool islop = (PL_last_lop == PL_oldoldbufptr);
3478 if (!islop || PL_last_lop_op == OP_GREPSTART)
3479 PL_expect = XOPERATOR;
3480 else if (strchr("$@\"'`q", *s))
3481 PL_expect = XTERM; /* e.g. print $fh "foo" */
3482 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3483 PL_expect = XTERM; /* e.g. print $fh &sub */
3484 else if (isIDFIRST_lazy_if(s,UTF)) {
3485 char tmpbuf[sizeof PL_tokenbuf];
3486 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3487 if ((tmp = keyword(tmpbuf, len))) {
3488 /* binary operators exclude handle interpretations */
3500 PL_expect = XTERM; /* e.g. print $fh length() */
3505 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3506 if (gv && GvCVu(gv))
3507 PL_expect = XTERM; /* e.g. print $fh subr() */
3510 else if (isDIGIT(*s))
3511 PL_expect = XTERM; /* e.g. print $fh 3 */
3512 else if (*s == '.' && isDIGIT(s[1]))
3513 PL_expect = XTERM; /* e.g. print $fh .3 */
3514 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3515 PL_expect = XTERM; /* e.g. print $fh -1 */
3516 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3517 PL_expect = XTERM; /* print $fh <<"EOF" */
3519 PL_pending_ident = '$';
3523 if (PL_expect == XOPERATOR)
3525 PL_tokenbuf[0] = '@';
3526 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3527 if (!PL_tokenbuf[1]) {
3529 yyerror("Final @ should be \\@ or @name");
3532 if (PL_lex_state == LEX_NORMAL)
3534 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3536 PL_tokenbuf[0] = '%';
3538 /* Warn about @ where they meant $. */
3539 if (ckWARN(WARN_SYNTAX)) {
3540 if (*s == '[' || *s == '{') {
3542 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3544 if (*t == '}' || *t == ']') {
3546 PL_bufptr = skipspace(PL_bufptr);
3547 Perl_warner(aTHX_ WARN_SYNTAX,
3548 "Scalar value %.*s better written as $%.*s",
3549 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3554 PL_pending_ident = '@';
3557 case '/': /* may either be division or pattern */
3558 case '?': /* may either be conditional or pattern */
3559 if (PL_expect != XOPERATOR) {
3560 /* Disable warning on "study /blah/" */
3561 if (PL_oldoldbufptr == PL_last_uni
3562 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3563 || memNE(PL_last_uni, "study", 5)
3564 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3566 s = scan_pat(s,OP_MATCH);
3567 TERM(sublex_start());
3575 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3576 #ifdef PERL_STRICT_CR
3579 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3581 && (s == PL_linestart || s[-1] == '\n') )
3583 PL_lex_formbrack = 0;
3587 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3593 yylval.ival = OPf_SPECIAL;
3599 if (PL_expect != XOPERATOR)
3604 case '0': case '1': case '2': case '3': case '4':
3605 case '5': case '6': case '7': case '8': case '9':
3606 s = scan_num(s, &yylval);
3607 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3608 "### Saw number in '%s'\n", s);
3610 if (PL_expect == XOPERATOR)
3615 s = scan_str(s,FALSE,FALSE);
3616 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3617 "### Saw string before '%s'\n", s);
3619 if (PL_expect == XOPERATOR) {
3620 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3623 return ','; /* grandfather non-comma-format format */
3629 missingterm((char*)0);
3630 yylval.ival = OP_CONST;
3631 TERM(sublex_start());
3634 s = scan_str(s,FALSE,FALSE);
3635 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3636 "### Saw string before '%s'\n", s);
3638 if (PL_expect == XOPERATOR) {
3639 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3642 return ','; /* grandfather non-comma-format format */
3648 missingterm((char*)0);
3649 yylval.ival = OP_CONST;
3650 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3651 if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) {
3652 yylval.ival = OP_STRINGIFY;
3656 TERM(sublex_start());
3659 s = scan_str(s,FALSE,FALSE);
3660 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3661 "### Saw backtick string before '%s'\n", s);
3663 if (PL_expect == XOPERATOR)
3664 no_op("Backticks",s);
3666 missingterm((char*)0);
3667 yylval.ival = OP_BACKTICK;
3669 TERM(sublex_start());
3673 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3674 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3676 if (PL_expect == XOPERATOR)
3677 no_op("Backslash",s);
3681 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3685 while (isDIGIT(*start) || *start == '_')
3687 if (*start == '.' && isDIGIT(start[1])) {
3688 s = scan_num(s, &yylval);
3691 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3692 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF || PL_expect == XSTATE)) {
3696 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3699 s = scan_num(s, &yylval);
3706 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3745 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3747 /* Some keywords can be followed by any delimiter, including ':' */
3748 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3749 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3750 (PL_tokenbuf[0] == 'q' &&
3751 strchr("qwxr", PL_tokenbuf[1])))));
3753 /* x::* is just a word, unless x is "CORE" */
3754 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3758 while (d < PL_bufend && isSPACE(*d))
3759 d++; /* no comments skipped here, or s### is misparsed */
3761 /* Is this a label? */
3762 if (!tmp && PL_expect == XSTATE
3763 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3765 yylval.pval = savepv(PL_tokenbuf);
3770 /* Check for keywords */
3771 tmp = keyword(PL_tokenbuf, len);
3773 /* Is this a word before a => operator? */
3774 if (*d == '=' && d[1] == '>') {
3776 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3777 yylval.opval->op_private = OPpCONST_BARE;
3778 if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len))
3779 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3783 if (tmp < 0) { /* second-class keyword? */
3784 GV *ogv = Nullgv; /* override (winner) */
3785 GV *hgv = Nullgv; /* hidden (loser) */
3786 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3788 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3791 if (GvIMPORTED_CV(gv))
3793 else if (! CvMETHOD(cv))
3797 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3798 (gv = *gvp) != (GV*)&PL_sv_undef &&
3799 GvCVu(gv) && GvIMPORTED_CV(gv))
3805 tmp = 0; /* overridden by import or by GLOBAL */
3808 && -tmp==KEY_lock /* XXX generalizable kludge */
3810 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3812 tmp = 0; /* any sub overrides "weak" keyword */
3814 else { /* no override */
3818 if (ckWARN(WARN_AMBIGUOUS) && hgv
3819 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3820 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3821 "Ambiguous call resolved as CORE::%s(), %s",
3822 GvENAME(hgv), "qualify as such or use &");
3829 default: /* not a keyword */
3833 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3835 /* Get the rest if it looks like a package qualifier */
3837 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3839 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3842 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3843 *s == '\'' ? "'" : "::");
3848 if (PL_expect == XOPERATOR) {
3849 if (PL_bufptr == PL_linestart) {
3850 CopLINE_dec(PL_curcop);
3851 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3852 CopLINE_inc(PL_curcop);
3855 no_op("Bareword",s);
3858 /* Look for a subroutine with this name in current package,
3859 unless name is "Foo::", in which case Foo is a bearword
3860 (and a package name). */
3863 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3865 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3866 Perl_warner(aTHX_ WARN_BAREWORD,
3867 "Bareword \"%s\" refers to nonexistent package",
3870 PL_tokenbuf[len] = '\0';
3877 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3880 /* if we saw a global override before, get the right name */
3883 sv = newSVpvn("CORE::GLOBAL::",14);
3884 sv_catpv(sv,PL_tokenbuf);
3887 sv = newSVpv(PL_tokenbuf,0);
3889 /* Presume this is going to be a bareword of some sort. */
3892 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3893 yylval.opval->op_private = OPpCONST_BARE;
3895 /* And if "Foo::", then that's what it certainly is. */
3900 /* See if it's the indirect object for a list operator. */
3902 if (PL_oldoldbufptr &&
3903 PL_oldoldbufptr < PL_bufptr &&
3904 (PL_oldoldbufptr == PL_last_lop
3905 || PL_oldoldbufptr == PL_last_uni) &&
3906 /* NO SKIPSPACE BEFORE HERE! */
3907 (PL_expect == XREF ||
3908 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3910 bool immediate_paren = *s == '(';
3912 /* (Now we can afford to cross potential line boundary.) */
3915 /* Two barewords in a row may indicate method call. */
3917 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3920 /* If not a declared subroutine, it's an indirect object. */
3921 /* (But it's an indir obj regardless for sort.) */
3923 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
3924 ((!gv || !GvCVu(gv)) &&
3925 (PL_last_lop_op != OP_MAPSTART &&
3926 PL_last_lop_op != OP_GREPSTART))))
3928 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3933 PL_expect = XOPERATOR;
3936 /* Is this a word before a => operator? */
3937 if (*s == '=' && s[1] == '>' && !pkgname) {
3939 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
3940 if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len))
3941 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3945 /* If followed by a paren, it's certainly a subroutine. */
3948 if (gv && GvCVu(gv)) {
3949 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
3950 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
3955 PL_nextval[PL_nexttoke].opval = yylval.opval;
3956 PL_expect = XOPERATOR;
3962 /* If followed by var or block, call it a method (unless sub) */
3964 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3965 PL_last_lop = PL_oldbufptr;
3966 PL_last_lop_op = OP_METHOD;
3970 /* If followed by a bareword, see if it looks like indir obj. */
3972 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
3975 /* Not a method, so call it a subroutine (if defined) */
3977 if (gv && GvCVu(gv)) {
3979 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
3980 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3981 "Ambiguous use of -%s resolved as -&%s()",
3982 PL_tokenbuf, PL_tokenbuf);
3983 /* Check for a constant sub */
3985 if ((sv = cv_const_sv(cv))) {
3987 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3988 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3989 yylval.opval->op_private = 0;
3993 /* Resolve to GV now. */
3994 op_free(yylval.opval);
3995 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3996 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
3997 PL_last_lop = PL_oldbufptr;
3998 PL_last_lop_op = OP_ENTERSUB;
3999 /* Is there a prototype? */
4002 char *proto = SvPV((SV*)cv, len);
4005 if (strEQ(proto, "$"))
4007 if (*proto == '&' && *s == '{') {
4008 sv_setpv(PL_subname,"__ANON__");
4012 PL_nextval[PL_nexttoke].opval = yylval.opval;
4018 /* Call it a bare word */
4020 if (PL_hints & HINT_STRICT_SUBS)
4021 yylval.opval->op_private |= OPpCONST_STRICT;
4024 if (ckWARN(WARN_RESERVED)) {
4025 if (lastchar != '-') {
4026 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
4027 if (!*d && strNE(PL_tokenbuf,"main"))
4028 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
4035 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
4036 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4037 "Operator or semicolon missing before %c%s",
4038 lastchar, PL_tokenbuf);
4039 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4040 "Ambiguous use of %c resolved as operator %c",
4041 lastchar, lastchar);
4047 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4048 newSVpv(CopFILE(PL_curcop),0));
4052 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4053 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
4056 case KEY___PACKAGE__:
4057 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4059 ? newSVsv(PL_curstname)
4068 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
4069 char *pname = "main";
4070 if (PL_tokenbuf[2] == 'D')
4071 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
4072 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
4075 GvIOp(gv) = newIO();
4076 IoIFP(GvIOp(gv)) = PL_rsfp;
4077 #if defined(HAS_FCNTL) && defined(F_SETFD)
4079 int fd = PerlIO_fileno(PL_rsfp);
4080 fcntl(fd,F_SETFD,fd >= 3);
4083 /* Mark this internal pseudo-handle as clean */
4084 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
4086 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
4087 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
4088 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
4090 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
4091 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4092 /* if the script was opened in binmode, we need to revert
4093 * it to text mode for compatibility; but only iff it has CRs
4094 * XXX this is a questionable hack at best. */
4095 if (PL_bufend-PL_bufptr > 2
4096 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4099 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4100 loc = PerlIO_tell(PL_rsfp);
4101 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4104 if (PerlLIO_setmode(PL_rsfp, O_TEXT) != -1) {
4106 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4107 #endif /* NETWARE */
4108 #ifdef PERLIO_IS_STDIO /* really? */
4109 # if defined(__BORLANDC__)
4110 /* XXX see note in do_binmode() */
4111 ((FILE*)PL_rsfp)->flags &= ~_F_BIN;
4115 PerlIO_seek(PL_rsfp, loc, 0);
4119 #ifdef PERLIO_LAYERS
4120 if (UTF && !IN_BYTES)
4121 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4134 if (PL_expect == XSTATE) {
4141 if (*s == ':' && s[1] == ':') {
4144 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4145 if (!(tmp = keyword(PL_tokenbuf, len)))
4146 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4160 LOP(OP_ACCEPT,XTERM);
4166 LOP(OP_ATAN2,XTERM);
4172 LOP(OP_BINMODE,XTERM);
4175 LOP(OP_BLESS,XTERM);
4184 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4201 if (!PL_cryptseen) {
4202 PL_cryptseen = TRUE;
4206 LOP(OP_CRYPT,XTERM);
4209 LOP(OP_CHMOD,XTERM);
4212 LOP(OP_CHOWN,XTERM);
4215 LOP(OP_CONNECT,XTERM);
4231 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4235 PL_hints |= HINT_BLOCK_SCOPE;
4245 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4246 LOP(OP_DBMOPEN,XTERM);
4252 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4259 yylval.ival = CopLINE(PL_curcop);
4273 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4274 UNIBRACK(OP_ENTEREVAL);
4289 case KEY_endhostent:
4295 case KEY_endservent:
4298 case KEY_endprotoent:
4309 yylval.ival = CopLINE(PL_curcop);
4311 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4313 if ((PL_bufend - p) >= 3 &&
4314 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4316 else if ((PL_bufend - p) >= 4 &&
4317 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4320 if (isIDFIRST_lazy_if(p,UTF)) {
4321 p = scan_ident(p, PL_bufend,
4322 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4326 Perl_croak(aTHX_ "Missing $ on loop variable");
4331 LOP(OP_FORMLINE,XTERM);
4337 LOP(OP_FCNTL,XTERM);
4343 LOP(OP_FLOCK,XTERM);
4352 LOP(OP_GREPSTART, XREF);
4355 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4370 case KEY_getpriority:
4371 LOP(OP_GETPRIORITY,XTERM);
4373 case KEY_getprotobyname:
4376 case KEY_getprotobynumber:
4377 LOP(OP_GPBYNUMBER,XTERM);
4379 case KEY_getprotoent:
4391 case KEY_getpeername:
4392 UNI(OP_GETPEERNAME);
4394 case KEY_gethostbyname:
4397 case KEY_gethostbyaddr:
4398 LOP(OP_GHBYADDR,XTERM);
4400 case KEY_gethostent:
4403 case KEY_getnetbyname:
4406 case KEY_getnetbyaddr:
4407 LOP(OP_GNBYADDR,XTERM);
4412 case KEY_getservbyname:
4413 LOP(OP_GSBYNAME,XTERM);
4415 case KEY_getservbyport:
4416 LOP(OP_GSBYPORT,XTERM);
4418 case KEY_getservent:
4421 case KEY_getsockname:
4422 UNI(OP_GETSOCKNAME);
4424 case KEY_getsockopt:
4425 LOP(OP_GSOCKOPT,XTERM);
4447 yylval.ival = CopLINE(PL_curcop);
4451 LOP(OP_INDEX,XTERM);
4457 LOP(OP_IOCTL,XTERM);
4469 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4501 LOP(OP_LISTEN,XTERM);
4510 s = scan_pat(s,OP_MATCH);
4511 TERM(sublex_start());
4514 LOP(OP_MAPSTART, XREF);
4517 LOP(OP_MKDIR,XTERM);
4520 LOP(OP_MSGCTL,XTERM);
4523 LOP(OP_MSGGET,XTERM);
4526 LOP(OP_MSGRCV,XTERM);
4529 LOP(OP_MSGSND,XTERM);
4535 if (isIDFIRST_lazy_if(s,UTF)) {
4536 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4537 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4539 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4540 if (!PL_in_my_stash) {
4543 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4551 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4558 if (PL_expect != XSTATE)
4559 yyerror("\"no\" not allowed in expression");
4560 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4561 s = force_version(s, FALSE);
4566 if (*s == '(' || (s = skipspace(s), *s == '('))
4573 if (isIDFIRST_lazy_if(s,UTF)) {
4575 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4577 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4578 Perl_warner(aTHX_ WARN_PRECEDENCE,
4579 "Precedence problem: open %.*s should be open(%.*s)",
4585 yylval.ival = OP_OR;
4595 LOP(OP_OPEN_DIR,XTERM);
4598 checkcomma(s,PL_tokenbuf,"filehandle");
4602 checkcomma(s,PL_tokenbuf,"filehandle");
4621 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4625 LOP(OP_PIPE_OP,XTERM);
4628 s = scan_str(s,FALSE,FALSE);
4630 missingterm((char*)0);
4631 yylval.ival = OP_CONST;
4632 TERM(sublex_start());
4638 s = scan_str(s,FALSE,FALSE);
4640 missingterm((char*)0);
4642 if (SvCUR(PL_lex_stuff)) {
4645 d = SvPV_force(PL_lex_stuff, len);
4648 for (; isSPACE(*d) && len; --len, ++d) ;
4651 if (!warned && ckWARN(WARN_QW)) {
4652 for (; !isSPACE(*d) && len; --len, ++d) {
4654 Perl_warner(aTHX_ WARN_QW,
4655 "Possible attempt to separate words with commas");
4658 else if (*d == '#') {
4659 Perl_warner(aTHX_ WARN_QW,
4660 "Possible attempt to put comments in qw() list");
4666 for (; !isSPACE(*d) && len; --len, ++d) ;
4668 sv = newSVpvn(b, d-b);
4669 if (DO_UTF8(PL_lex_stuff))
4671 words = append_elem(OP_LIST, words,
4672 newSVOP(OP_CONST, 0, tokeq(sv)));
4676 PL_nextval[PL_nexttoke].opval = words;
4681 SvREFCNT_dec(PL_lex_stuff);
4682 PL_lex_stuff = Nullsv;
4688 s = scan_str(s,FALSE,FALSE);
4690 missingterm((char*)0);
4691 yylval.ival = OP_STRINGIFY;
4692 if (SvIVX(PL_lex_stuff) == '\'')
4693 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4694 TERM(sublex_start());
4697 s = scan_pat(s,OP_QR);
4698 TERM(sublex_start());
4701 s = scan_str(s,FALSE,FALSE);
4703 missingterm((char*)0);
4704 yylval.ival = OP_BACKTICK;
4706 TERM(sublex_start());
4714 s = force_version(s, FALSE);
4716 else if (*s != 'v' || !isDIGIT(s[1])
4717 || (s = force_version(s, TRUE), *s == 'v'))
4719 *PL_tokenbuf = '\0';
4720 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4721 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4722 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4724 yyerror("<> should be quotes");
4732 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4736 LOP(OP_RENAME,XTERM);
4745 LOP(OP_RINDEX,XTERM);
4768 LOP(OP_REVERSE,XTERM);
4779 TERM(sublex_start());
4781 TOKEN(1); /* force error */
4790 LOP(OP_SELECT,XTERM);
4796 LOP(OP_SEMCTL,XTERM);
4799 LOP(OP_SEMGET,XTERM);
4802 LOP(OP_SEMOP,XTERM);
4808 LOP(OP_SETPGRP,XTERM);
4810 case KEY_setpriority:
4811 LOP(OP_SETPRIORITY,XTERM);
4813 case KEY_sethostent:
4819 case KEY_setservent:
4822 case KEY_setprotoent:
4832 LOP(OP_SEEKDIR,XTERM);
4834 case KEY_setsockopt:
4835 LOP(OP_SSOCKOPT,XTERM);
4841 LOP(OP_SHMCTL,XTERM);
4844 LOP(OP_SHMGET,XTERM);
4847 LOP(OP_SHMREAD,XTERM);
4850 LOP(OP_SHMWRITE,XTERM);
4853 LOP(OP_SHUTDOWN,XTERM);
4862 LOP(OP_SOCKET,XTERM);
4864 case KEY_socketpair:
4865 LOP(OP_SOCKPAIR,XTERM);
4868 checkcomma(s,PL_tokenbuf,"subroutine name");
4870 if (*s == ';' || *s == ')') /* probably a close */
4871 Perl_croak(aTHX_ "sort is now a reserved word");
4873 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4877 LOP(OP_SPLIT,XTERM);
4880 LOP(OP_SPRINTF,XTERM);
4883 LOP(OP_SPLICE,XTERM);
4898 LOP(OP_SUBSTR,XTERM);
4904 char tmpbuf[sizeof PL_tokenbuf];
4905 SSize_t tboffset = 0;
4906 expectation attrful;
4907 bool have_name, have_proto;
4912 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4913 (*s == ':' && s[1] == ':'))
4916 attrful = XATTRBLOCK;
4917 /* remember buffer pos'n for later force_word */
4918 tboffset = s - PL_oldbufptr;
4919 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4920 if (strchr(tmpbuf, ':'))
4921 sv_setpv(PL_subname, tmpbuf);
4923 sv_setsv(PL_subname,PL_curstname);
4924 sv_catpvn(PL_subname,"::",2);
4925 sv_catpvn(PL_subname,tmpbuf,len);
4932 Perl_croak(aTHX_ "Missing name in \"my sub\"");
4933 PL_expect = XTERMBLOCK;
4934 attrful = XATTRTERM;
4935 sv_setpv(PL_subname,"?");
4939 if (key == KEY_format) {
4941 PL_lex_formbrack = PL_lex_brackets + 1;
4943 (void) force_word(PL_oldbufptr + tboffset, WORD,
4948 /* Look for a prototype */
4952 s = scan_str(s,FALSE,FALSE);
4954 Perl_croak(aTHX_ "Prototype not terminated");
4956 d = SvPVX(PL_lex_stuff);
4958 for (p = d; *p; ++p) {
4963 SvCUR(PL_lex_stuff) = tmp;
4971 if (*s == ':' && s[1] != ':')
4972 PL_expect = attrful;
4975 PL_nextval[PL_nexttoke].opval =
4976 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4977 PL_lex_stuff = Nullsv;
4981 sv_setpv(PL_subname,"__ANON__");
4984 (void) force_word(PL_oldbufptr + tboffset, WORD,
4993 LOP(OP_SYSTEM,XREF);
4996 LOP(OP_SYMLINK,XTERM);
4999 LOP(OP_SYSCALL,XTERM);
5002 LOP(OP_SYSOPEN,XTERM);
5005 LOP(OP_SYSSEEK,XTERM);
5008 LOP(OP_SYSREAD,XTERM);
5011 LOP(OP_SYSWRITE,XTERM);
5015 TERM(sublex_start());
5036 LOP(OP_TRUNCATE,XTERM);
5048 yylval.ival = CopLINE(PL_curcop);
5052 yylval.ival = CopLINE(PL_curcop);
5056 LOP(OP_UNLINK,XTERM);
5062 LOP(OP_UNPACK,XTERM);
5065 LOP(OP_UTIME,XTERM);
5071 LOP(OP_UNSHIFT,XTERM);
5074 if (PL_expect != XSTATE)
5075 yyerror("\"use\" not allowed in expression");
5077 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
5078 s = force_version(s, TRUE);
5079 if (*s == ';' || (s = skipspace(s), *s == ';')) {
5080 PL_nextval[PL_nexttoke].opval = Nullop;
5083 else if (*s == 'v') {
5084 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5085 s = force_version(s, FALSE);
5089 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5090 s = force_version(s, FALSE);
5102 yylval.ival = CopLINE(PL_curcop);
5106 PL_hints |= HINT_BLOCK_SCOPE;
5113 LOP(OP_WAITPID,XTERM);
5122 ctl_l[0] = toCTRL('L');
5124 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5127 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5132 if (PL_expect == XOPERATOR)
5138 yylval.ival = OP_XOR;
5143 TERM(sublex_start());
5148 #pragma segment Main
5152 S_pending_ident(pTHX)
5156 /* pit holds the identifier we read and pending_ident is reset */
5157 char pit = PL_pending_ident;
5158 PL_pending_ident = 0;
5160 DEBUG_T({ PerlIO_printf(Perl_debug_log,
5161 "### Tokener saw identifier '%s'\n", PL_tokenbuf); });
5163 /* if we're in a my(), we can't allow dynamics here.
5164 $foo'bar has already been turned into $foo::bar, so
5165 just check for colons.
5167 if it's a legal name, the OP is a PADANY.
5170 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
5171 if (strchr(PL_tokenbuf,':'))
5172 yyerror(Perl_form(aTHX_ "No package name allowed for "
5173 "variable %s in \"our\"",
5175 tmp = pad_allocmy(PL_tokenbuf);
5178 if (strchr(PL_tokenbuf,':'))
5179 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
5181 yylval.opval = newOP(OP_PADANY, 0);
5182 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
5188 build the ops for accesses to a my() variable.
5190 Deny my($a) or my($b) in a sort block, *if* $a or $b is
5191 then used in a comparison. This catches most, but not
5192 all cases. For instance, it catches
5193 sort { my($a); $a <=> $b }
5195 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
5196 (although why you'd do that is anyone's guess).
5199 if (!strchr(PL_tokenbuf,':')) {
5200 #ifdef USE_5005THREADS
5201 /* Check for single character per-thread SVs */
5202 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
5203 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
5204 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
5206 yylval.opval = newOP(OP_THREADSV, 0);
5207 yylval.opval->op_targ = tmp;
5210 #endif /* USE_5005THREADS */
5211 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
5212 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
5213 /* might be an "our" variable" */
5214 if (SvFLAGS(namesv) & SVpad_OUR) {
5215 /* build ops for a bareword */
5216 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
5217 sv_catpvn(sym, "::", 2);
5218 sv_catpv(sym, PL_tokenbuf+1);
5219 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
5220 yylval.opval->op_private = OPpCONST_ENTERED;
5221 gv_fetchpv(SvPVX(sym),
5223 ? (GV_ADDMULTI | GV_ADDINEVAL)
5226 ((PL_tokenbuf[0] == '$') ? SVt_PV
5227 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
5232 /* if it's a sort block and they're naming $a or $b */
5233 if (PL_last_lop_op == OP_SORT &&
5234 PL_tokenbuf[0] == '$' &&
5235 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
5238 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
5239 d < PL_bufend && *d != '\n';
5242 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
5243 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
5249 yylval.opval = newOP(OP_PADANY, 0);
5250 yylval.opval->op_targ = tmp;
5256 Whine if they've said @foo in a doublequoted string,
5257 and @foo isn't a variable we can find in the symbol
5260 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
5261 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
5262 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
5263 && ckWARN(WARN_AMBIGUOUS))
5265 /* Downgraded from fatal to warning 20000522 mjd */
5266 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5267 "Possible unintended interpolation of %s in string",
5272 /* build ops for a bareword */
5273 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
5274 yylval.opval->op_private = OPpCONST_ENTERED;
5275 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
5276 ((PL_tokenbuf[0] == '$') ? SVt_PV
5277 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
5283 Perl_keyword(pTHX_ register char *d, I32 len)
5288 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5289 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5290 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5291 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5292 if (strEQ(d,"__END__")) return KEY___END__;
5296 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5301 if (strEQ(d,"and")) return -KEY_and;
5302 if (strEQ(d,"abs")) return -KEY_abs;
5305 if (strEQ(d,"alarm")) return -KEY_alarm;
5306 if (strEQ(d,"atan2")) return -KEY_atan2;
5309 if (strEQ(d,"accept")) return -KEY_accept;
5314 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5317 if (strEQ(d,"bless")) return -KEY_bless;
5318 if (strEQ(d,"bind")) return -KEY_bind;
5319 if (strEQ(d,"binmode")) return -KEY_binmode;
5322 if (strEQ(d,"CORE")) return -KEY_CORE;
5323 if (strEQ(d,"CHECK")) return KEY_CHECK;
5328 if (strEQ(d,"cmp")) return -KEY_cmp;
5329 if (strEQ(d,"chr")) return -KEY_chr;
5330 if (strEQ(d,"cos")) return -KEY_cos;
5333 if (strEQ(d,"chop")) return KEY_chop;
5336 if (strEQ(d,"close")) return -KEY_close;
5337 if (strEQ(d,"chdir")) return -KEY_chdir;
5338 if (strEQ(d,"chomp")) return KEY_chomp;
5339 if (strEQ(d,"chmod")) return -KEY_chmod;
5340 if (strEQ(d,"chown")) return -KEY_chown;
5341 if (strEQ(d,"crypt")) return -KEY_crypt;
5344 if (strEQ(d,"chroot")) return -KEY_chroot;
5345 if (strEQ(d,"caller")) return -KEY_caller;
5348 if (strEQ(d,"connect")) return -KEY_connect;
5351 if (strEQ(d,"closedir")) return -KEY_closedir;
5352 if (strEQ(d,"continue")) return -KEY_continue;
5357 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5362 if (strEQ(d,"do")) return KEY_do;
5365 if (strEQ(d,"die")) return -KEY_die;
5368 if (strEQ(d,"dump")) return -KEY_dump;
5371 if (strEQ(d,"delete")) return KEY_delete;
5374 if (strEQ(d,"defined")) return KEY_defined;
5375 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5378 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5383 if (strEQ(d,"END")) return KEY_END;
5388 if (strEQ(d,"eq")) return -KEY_eq;
5391 if (strEQ(d,"eof")) return -KEY_eof;
5392 if (strEQ(d,"exp")) return -KEY_exp;
5395 if (strEQ(d,"else")) return KEY_else;
5396 if (strEQ(d,"exit")) return -KEY_exit;
5397 if (strEQ(d,"eval")) return KEY_eval;
5398 if (strEQ(d,"exec")) return -KEY_exec;
5399 if (strEQ(d,"each")) return -KEY_each;
5402 if (strEQ(d,"elsif")) return KEY_elsif;
5405 if (strEQ(d,"exists")) return KEY_exists;
5406 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5409 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5410 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5413 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5416 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5417 if (strEQ(d,"endservent")) return -KEY_endservent;
5420 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5427 if (strEQ(d,"for")) return KEY_for;
5430 if (strEQ(d,"fork")) return -KEY_fork;
5433 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5434 if (strEQ(d,"flock")) return -KEY_flock;
5437 if (strEQ(d,"format")) return KEY_format;
5438 if (strEQ(d,"fileno")) return -KEY_fileno;
5441 if (strEQ(d,"foreach")) return KEY_foreach;
5444 if (strEQ(d,"formline")) return -KEY_formline;
5449 if (strnEQ(d,"get",3)) {
5454 if (strEQ(d,"ppid")) return -KEY_getppid;
5455 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5458 if (strEQ(d,"pwent")) return -KEY_getpwent;
5459 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5460 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5463 if (strEQ(d,"peername")) return -KEY_getpeername;
5464 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5465 if (strEQ(d,"priority")) return -KEY_getpriority;
5468 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5471 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5475 else if (*d == 'h') {
5476 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5477 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5478 if (strEQ(d,"hostent")) return -KEY_gethostent;
5480 else if (*d == 'n') {
5481 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5482 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5483 if (strEQ(d,"netent")) return -KEY_getnetent;
5485 else if (*d == 's') {
5486 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5487 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5488 if (strEQ(d,"servent")) return -KEY_getservent;
5489 if (strEQ(d,"sockname")) return -KEY_getsockname;
5490 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5492 else if (*d == 'g') {
5493 if (strEQ(d,"grent")) return -KEY_getgrent;
5494 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5495 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5497 else if (*d == 'l') {
5498 if (strEQ(d,"login")) return -KEY_getlogin;
5500 else if (strEQ(d,"c")) return -KEY_getc;
5505 if (strEQ(d,"gt")) return -KEY_gt;
5506 if (strEQ(d,"ge")) return -KEY_ge;
5509 if (strEQ(d,"grep")) return KEY_grep;
5510 if (strEQ(d,"goto")) return KEY_goto;
5511 if (strEQ(d,"glob")) return KEY_glob;
5514 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5519 if (strEQ(d,"hex")) return -KEY_hex;
5522 if (strEQ(d,"INIT")) return KEY_INIT;
5527 if (strEQ(d,"if")) return KEY_if;
5530 if (strEQ(d,"int")) return -KEY_int;
5533 if (strEQ(d,"index")) return -KEY_index;
5534 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5539 if (strEQ(d,"join")) return -KEY_join;
5543 if (strEQ(d,"keys")) return -KEY_keys;
5544 if (strEQ(d,"kill")) return -KEY_kill;
5550 if (strEQ(d,"lt")) return -KEY_lt;
5551 if (strEQ(d,"le")) return -KEY_le;
5552 if (strEQ(d,"lc")) return -KEY_lc;
5555 if (strEQ(d,"log")) return -KEY_log;
5558 if (strEQ(d,"last")) return KEY_last;
5559 if (strEQ(d,"link")) return -KEY_link;
5560 if (strEQ(d,"lock")) return -KEY_lock;
5563 if (strEQ(d,"local")) return KEY_local;
5564 if (strEQ(d,"lstat")) return -KEY_lstat;
5567 if (strEQ(d,"length")) return -KEY_length;
5568 if (strEQ(d,"listen")) return -KEY_listen;
5571 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5574 if (strEQ(d,"localtime")) return -KEY_localtime;
5580 case 1: return KEY_m;
5582 if (strEQ(d,"my")) return KEY_my;
5585 if (strEQ(d,"map")) return KEY_map;
5588 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5591 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5592 if (strEQ(d,"msgget")) return -KEY_msgget;
5593 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5594 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5599 if (strEQ(d,"next")) return KEY_next;
5600 if (strEQ(d,"ne")) return -KEY_ne;
5601 if (strEQ(d,"not")) return -KEY_not;
5602 if (strEQ(d,"no")) return KEY_no;
5607 if (strEQ(d,"or")) return -KEY_or;
5610 if (strEQ(d,"ord")) return -KEY_ord;
5611 if (strEQ(d,"oct")) return -KEY_oct;
5612 if (strEQ(d,"our")) return KEY_our;
5615 if (strEQ(d,"open")) return -KEY_open;
5618 if (strEQ(d,"opendir")) return -KEY_opendir;
5625 if (strEQ(d,"pop")) return -KEY_pop;
5626 if (strEQ(d,"pos")) return KEY_pos;
5629 if (strEQ(d,"push")) return -KEY_push;
5630 if (strEQ(d,"pack")) return -KEY_pack;
5631 if (strEQ(d,"pipe")) return -KEY_pipe;
5634 if (strEQ(d,"print")) return KEY_print;
5637 if (strEQ(d,"printf")) return KEY_printf;
5640 if (strEQ(d,"package")) return KEY_package;
5643 if (strEQ(d,"prototype")) return KEY_prototype;
5648 if (strEQ(d,"q")) return KEY_q;
5649 if (strEQ(d,"qr")) return KEY_qr;
5650 if (strEQ(d,"qq")) return KEY_qq;
5651 if (strEQ(d,"qw")) return KEY_qw;
5652 if (strEQ(d,"qx")) return KEY_qx;
5654 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5659 if (strEQ(d,"ref")) return -KEY_ref;
5662 if (strEQ(d,"read")) return -KEY_read;
5663 if (strEQ(d,"rand")) return -KEY_rand;
5664 if (strEQ(d,"recv")) return -KEY_recv;
5665 if (strEQ(d,"redo")) return KEY_redo;
5668 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5669 if (strEQ(d,"reset")) return -KEY_reset;
5672 if (strEQ(d,"return")) return KEY_return;
5673 if (strEQ(d,"rename")) return -KEY_rename;
5674 if (strEQ(d,"rindex")) return -KEY_rindex;
5677 if (strEQ(d,"require")) return KEY_require;
5678 if (strEQ(d,"reverse")) return -KEY_reverse;
5679 if (strEQ(d,"readdir")) return -KEY_readdir;
5682 if (strEQ(d,"readlink")) return -KEY_readlink;
5683 if (strEQ(d,"readline")) return -KEY_readline;
5684 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5687 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5693 case 0: return KEY_s;
5695 if (strEQ(d,"scalar")) return KEY_scalar;
5700 if (strEQ(d,"seek")) return -KEY_seek;
5701 if (strEQ(d,"send")) return -KEY_send;
5704 if (strEQ(d,"semop")) return -KEY_semop;
5707 if (strEQ(d,"select")) return -KEY_select;
5708 if (strEQ(d,"semctl")) return -KEY_semctl;
5709 if (strEQ(d,"semget")) return -KEY_semget;
5712 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5713 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5716 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5717 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5720 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5723 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5724 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5725 if (strEQ(d,"setservent")) return -KEY_setservent;
5728 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5729 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5736 if (strEQ(d,"shift")) return -KEY_shift;
5739 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5740 if (strEQ(d,"shmget")) return -KEY_shmget;
5743 if (strEQ(d,"shmread")) return -KEY_shmread;
5746 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5747 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5752 if (strEQ(d,"sin")) return -KEY_sin;
5755 if (strEQ(d,"sleep")) return -KEY_sleep;
5758 if (strEQ(d,"sort")) return KEY_sort;
5759 if (strEQ(d,"socket")) return -KEY_socket;
5760 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5763 if (strEQ(d,"split")) return KEY_split;
5764 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5765 if (strEQ(d,"splice")) return -KEY_splice;
5768 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5771 if (strEQ(d,"srand")) return -KEY_srand;
5774 if (strEQ(d,"stat")) return -KEY_stat;
5775 if (strEQ(d,"study")) return KEY_study;
5778 if (strEQ(d,"substr")) return -KEY_substr;
5779 if (strEQ(d,"sub")) return KEY_sub;
5784 if (strEQ(d,"system")) return -KEY_system;
5787 if (strEQ(d,"symlink")) return -KEY_symlink;
5788 if (strEQ(d,"syscall")) return -KEY_syscall;
5789 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5790 if (strEQ(d,"sysread")) return -KEY_sysread;
5791 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5794 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5803 if (strEQ(d,"tr")) return KEY_tr;
5806 if (strEQ(d,"tie")) return KEY_tie;
5809 if (strEQ(d,"tell")) return -KEY_tell;
5810 if (strEQ(d,"tied")) return KEY_tied;
5811 if (strEQ(d,"time")) return -KEY_time;
5814 if (strEQ(d,"times")) return -KEY_times;
5817 if (strEQ(d,"telldir")) return -KEY_telldir;
5820 if (strEQ(d,"truncate")) return -KEY_truncate;
5827 if (strEQ(d,"uc")) return -KEY_uc;
5830 if (strEQ(d,"use")) return KEY_use;
5833 if (strEQ(d,"undef")) return KEY_undef;
5834 if (strEQ(d,"until")) return KEY_until;
5835 if (strEQ(d,"untie")) return KEY_untie;
5836 if (strEQ(d,"utime")) return -KEY_utime;
5837 if (strEQ(d,"umask")) return -KEY_umask;
5840 if (strEQ(d,"unless")) return KEY_unless;
5841 if (strEQ(d,"unpack")) return -KEY_unpack;
5842 if (strEQ(d,"unlink")) return -KEY_unlink;
5845 if (strEQ(d,"unshift")) return -KEY_unshift;
5846 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5851 if (strEQ(d,"values")) return -KEY_values;
5852 if (strEQ(d,"vec")) return -KEY_vec;
5857 if (strEQ(d,"warn")) return -KEY_warn;
5858 if (strEQ(d,"wait")) return -KEY_wait;
5861 if (strEQ(d,"while")) return KEY_while;
5862 if (strEQ(d,"write")) return -KEY_write;
5865 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5868 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5873 if (len == 1) return -KEY_x;
5874 if (strEQ(d,"xor")) return -KEY_xor;
5877 if (len == 1) return KEY_y;
5886 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5890 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5891 if (ckWARN(WARN_SYNTAX)) {
5893 for (w = s+2; *w && level; w++) {
5900 for (; *w && isSPACE(*w); w++) ;
5901 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5902 Perl_warner(aTHX_ WARN_SYNTAX,
5903 "%s (...) interpreted as function",name);
5906 while (s < PL_bufend && isSPACE(*s))
5910 while (s < PL_bufend && isSPACE(*s))
5912 if (isIDFIRST_lazy_if(s,UTF)) {
5914 while (isALNUM_lazy_if(s,UTF))
5916 while (s < PL_bufend && isSPACE(*s))
5921 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5925 Perl_croak(aTHX_ "No comma allowed after %s", what);
5930 /* Either returns sv, or mortalizes sv and returns a new SV*.
5931 Best used as sv=new_constant(..., sv, ...).
5932 If s, pv are NULL, calls subroutine with one argument,
5933 and type is used with error messages only. */
5936 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5940 HV *table = GvHV(PL_hintgv); /* ^H */
5944 const char *why1, *why2, *why3;
5946 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5949 why2 = strEQ(key,"charnames")
5950 ? "(possibly a missing \"use charnames ...\")"
5952 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
5953 (type ? type: "undef"), why2);
5955 /* This is convoluted and evil ("goto considered harmful")
5956 * but I do not understand the intricacies of all the different
5957 * failure modes of %^H in here. The goal here is to make
5958 * the most probable error message user-friendly. --jhi */
5963 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
5964 (type ? type: "undef"), why1, why2, why3);
5966 yyerror(SvPVX(msg));
5970 cvp = hv_fetch(table, key, strlen(key), FALSE);
5971 if (!cvp || !SvOK(*cvp)) {
5974 why3 = "} is not defined";
5977 sv_2mortal(sv); /* Parent created it permanently */
5980 pv = sv_2mortal(newSVpvn(s, len));
5982 typesv = sv_2mortal(newSVpv(type, 0));
5984 typesv = &PL_sv_undef;
5986 PUSHSTACKi(PERLSI_OVERLOAD);
5998 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
6002 /* Check the eval first */
6003 if (!PL_in_eval && SvTRUE(ERRSV)) {
6005 sv_catpv(ERRSV, "Propagated");
6006 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
6008 res = SvREFCNT_inc(sv);
6012 (void)SvREFCNT_inc(res);
6021 why1 = "Call to &{$^H{";
6023 why3 = "}} did not return a defined value";
6032 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
6034 register char *d = dest;
6035 register char *e = d + destlen - 3; /* two-character token, ending NUL */
6038 Perl_croak(aTHX_ ident_too_long);
6039 if (isALNUM(*s)) /* UTF handled below */
6041 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
6046 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
6050 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6051 char *t = s + UTF8SKIP(s);
6052 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6054 if (d + (t - s) > e)
6055 Perl_croak(aTHX_ ident_too_long);
6056 Copy(s, d, t - s, char);
6069 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
6079 e = d + destlen - 3; /* two-character token, ending NUL */
6081 while (isDIGIT(*s)) {
6083 Perl_croak(aTHX_ ident_too_long);
6090 Perl_croak(aTHX_ ident_too_long);
6091 if (isALNUM(*s)) /* UTF handled below */
6093 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
6098 else if (*s == ':' && s[1] == ':') {
6102 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6103 char *t = s + UTF8SKIP(s);
6104 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6106 if (d + (t - s) > e)
6107 Perl_croak(aTHX_ ident_too_long);
6108 Copy(s, d, t - s, char);
6119 if (PL_lex_state != LEX_NORMAL)
6120 PL_lex_state = LEX_INTERPENDMAYBE;
6123 if (*s == '$' && s[1] &&
6124 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
6137 if (*d == '^' && *s && isCONTROLVAR(*s)) {
6142 if (isSPACE(s[-1])) {
6145 if (!SPACE_OR_TAB(ch)) {
6151 if (isIDFIRST_lazy_if(d,UTF)) {
6155 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
6157 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
6160 Copy(s, d, e - s, char);
6165 while ((isALNUM(*s) || *s == ':') && d < e)
6168 Perl_croak(aTHX_ ident_too_long);
6171 while (s < send && SPACE_OR_TAB(*s)) s++;
6172 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
6173 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
6174 const char *brack = *s == '[' ? "[...]" : "{...}";
6175 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6176 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
6177 funny, dest, brack, funny, dest, brack);
6180 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
6184 /* Handle extended ${^Foo} variables
6185 * 1999-02-27 mjd-perl-patch@plover.com */
6186 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6190 while (isALNUM(*s) && d < e) {
6194 Perl_croak(aTHX_ ident_too_long);
6199 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6200 PL_lex_state = LEX_INTERPEND;
6203 if (PL_lex_state == LEX_NORMAL) {
6204 if (ckWARN(WARN_AMBIGUOUS) &&
6205 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
6207 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6208 "Ambiguous use of %c{%s} resolved to %c%s",
6209 funny, dest, funny, dest);
6214 s = bracket; /* let the parser handle it */
6218 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6219 PL_lex_state = LEX_INTERPEND;
6224 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
6229 *pmfl |= PMf_GLOBAL;
6231 *pmfl |= PMf_CONTINUE;
6235 *pmfl |= PMf_MULTILINE;
6237 *pmfl |= PMf_SINGLELINE;
6239 *pmfl |= PMf_EXTENDED;
6243 S_scan_pat(pTHX_ char *start, I32 type)
6248 s = scan_str(start,FALSE,FALSE);
6250 Perl_croak(aTHX_ "Search pattern not terminated");
6252 pm = (PMOP*)newPMOP(type, 0);
6253 if (PL_multi_open == '?')
6254 pm->op_pmflags |= PMf_ONCE;
6256 while (*s && strchr("iomsx", *s))
6257 pmflag(&pm->op_pmflags,*s++);
6260 while (*s && strchr("iogcmsx", *s))
6261 pmflag(&pm->op_pmflags,*s++);
6263 pm->op_pmpermflags = pm->op_pmflags;
6265 PL_lex_op = (OP*)pm;
6266 yylval.ival = OP_MATCH;
6271 S_scan_subst(pTHX_ char *start)
6278 yylval.ival = OP_NULL;
6280 s = scan_str(start,FALSE,FALSE);
6283 Perl_croak(aTHX_ "Substitution pattern not terminated");
6285 if (s[-1] == PL_multi_open)
6288 first_start = PL_multi_start;
6289 s = scan_str(s,FALSE,FALSE);
6292 SvREFCNT_dec(PL_lex_stuff);
6293 PL_lex_stuff = Nullsv;
6295 Perl_croak(aTHX_ "Substitution replacement not terminated");
6297 PL_multi_start = first_start; /* so whole substitution is taken together */
6299 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6305 else if (strchr("iogcmsx", *s))
6306 pmflag(&pm->op_pmflags,*s++);
6313 PL_sublex_info.super_bufptr = s;
6314 PL_sublex_info.super_bufend = PL_bufend;
6316 pm->op_pmflags |= PMf_EVAL;
6317 repl = newSVpvn("",0);
6319 sv_catpv(repl, es ? "eval " : "do ");
6320 sv_catpvn(repl, "{ ", 2);
6321 sv_catsv(repl, PL_lex_repl);
6322 sv_catpvn(repl, " };", 2);
6324 SvREFCNT_dec(PL_lex_repl);
6328 pm->op_pmpermflags = pm->op_pmflags;
6329 PL_lex_op = (OP*)pm;
6330 yylval.ival = OP_SUBST;
6335 S_scan_trans(pTHX_ char *start)
6344 yylval.ival = OP_NULL;
6346 s = scan_str(start,FALSE,FALSE);
6348 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6349 if (s[-1] == PL_multi_open)
6352 s = scan_str(s,FALSE,FALSE);
6355 SvREFCNT_dec(PL_lex_stuff);
6356 PL_lex_stuff = Nullsv;
6358 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6361 complement = del = squash = 0;
6362 while (strchr("cds", *s)) {
6364 complement = OPpTRANS_COMPLEMENT;
6366 del = OPpTRANS_DELETE;
6368 squash = OPpTRANS_SQUASH;
6372 New(803, tbl, complement&&!del?258:256, short);
6373 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6374 o->op_private = del|squash|complement|
6375 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6376 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
6379 yylval.ival = OP_TRANS;
6384 S_scan_heredoc(pTHX_ register char *s)
6387 I32 op_type = OP_SCALAR;
6394 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6398 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6401 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6402 if (*peek && strchr("`'\"",*peek)) {
6405 s = delimcpy(d, e, s, PL_bufend, term, &len);
6415 if (!isALNUM_lazy_if(s,UTF))
6416 deprecate("bare << to mean <<\"\"");
6417 for (; isALNUM_lazy_if(s,UTF); s++) {
6422 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6423 Perl_croak(aTHX_ "Delimiter for here document is too long");
6426 len = d - PL_tokenbuf;
6427 #ifndef PERL_STRICT_CR
6428 d = strchr(s, '\r');
6432 while (s < PL_bufend) {
6438 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6447 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6452 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6453 herewas = newSVpvn(s,PL_bufend-s);
6455 s--, herewas = newSVpvn(s,d-s);
6456 s += SvCUR(herewas);
6458 tmpstr = NEWSV(87,79);
6459 sv_upgrade(tmpstr, SVt_PVIV);
6464 else if (term == '`') {
6465 op_type = OP_BACKTICK;
6466 SvIVX(tmpstr) = '\\';
6470 PL_multi_start = CopLINE(PL_curcop);
6471 PL_multi_open = PL_multi_close = '<';
6472 term = *PL_tokenbuf;
6473 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6474 char *bufptr = PL_sublex_info.super_bufptr;
6475 char *bufend = PL_sublex_info.super_bufend;
6476 char *olds = s - SvCUR(herewas);
6477 s = strchr(bufptr, '\n');
6481 while (s < bufend &&
6482 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6484 CopLINE_inc(PL_curcop);
6487 CopLINE_set(PL_curcop, PL_multi_start);
6488 missingterm(PL_tokenbuf);
6490 sv_setpvn(herewas,bufptr,d-bufptr+1);
6491 sv_setpvn(tmpstr,d+1,s-d);
6493 sv_catpvn(herewas,s,bufend-s);
6494 (void)strcpy(bufptr,SvPVX(herewas));
6501 while (s < PL_bufend &&
6502 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6504 CopLINE_inc(PL_curcop);
6506 if (s >= PL_bufend) {
6507 CopLINE_set(PL_curcop, PL_multi_start);
6508 missingterm(PL_tokenbuf);
6510 sv_setpvn(tmpstr,d+1,s-d);
6512 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6514 sv_catpvn(herewas,s,PL_bufend-s);
6515 sv_setsv(PL_linestr,herewas);
6516 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6517 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6518 PL_last_lop = PL_last_uni = Nullch;
6521 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6522 while (s >= PL_bufend) { /* multiple line string? */
6524 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6525 CopLINE_set(PL_curcop, PL_multi_start);
6526 missingterm(PL_tokenbuf);
6528 CopLINE_inc(PL_curcop);
6529 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6530 PL_last_lop = PL_last_uni = Nullch;
6531 #ifndef PERL_STRICT_CR
6532 if (PL_bufend - PL_linestart >= 2) {
6533 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6534 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6536 PL_bufend[-2] = '\n';
6538 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6540 else if (PL_bufend[-1] == '\r')
6541 PL_bufend[-1] = '\n';
6543 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6544 PL_bufend[-1] = '\n';
6546 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6547 SV *sv = NEWSV(88,0);
6549 sv_upgrade(sv, SVt_PVMG);
6550 sv_setsv(sv,PL_linestr);
6553 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6555 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6558 sv_catsv(PL_linestr,herewas);
6559 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6563 sv_catsv(tmpstr,PL_linestr);
6568 PL_multi_end = CopLINE(PL_curcop);
6569 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6570 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6571 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6573 SvREFCNT_dec(herewas);
6574 if (UTF && !IN_BYTES && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
6576 PL_lex_stuff = tmpstr;
6577 yylval.ival = op_type;
6582 takes: current position in input buffer
6583 returns: new position in input buffer
6584 side-effects: yylval and lex_op are set.
6589 <FH> read from filehandle
6590 <pkg::FH> read from package qualified filehandle
6591 <pkg'FH> read from package qualified filehandle
6592 <$fh> read from filehandle in $fh
6598 S_scan_inputsymbol(pTHX_ char *start)
6600 register char *s = start; /* current position in buffer */
6606 d = PL_tokenbuf; /* start of temp holding space */
6607 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6608 end = strchr(s, '\n');
6611 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6613 /* die if we didn't have space for the contents of the <>,
6614 or if it didn't end, or if we see a newline
6617 if (len >= sizeof PL_tokenbuf)
6618 Perl_croak(aTHX_ "Excessively long <> operator");
6620 Perl_croak(aTHX_ "Unterminated <> operator");
6625 Remember, only scalar variables are interpreted as filehandles by
6626 this code. Anything more complex (e.g., <$fh{$num}>) will be
6627 treated as a glob() call.
6628 This code makes use of the fact that except for the $ at the front,
6629 a scalar variable and a filehandle look the same.
6631 if (*d == '$' && d[1]) d++;
6633 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6634 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6637 /* If we've tried to read what we allow filehandles to look like, and
6638 there's still text left, then it must be a glob() and not a getline.
6639 Use scan_str to pull out the stuff between the <> and treat it
6640 as nothing more than a string.
6643 if (d - PL_tokenbuf != len) {
6644 yylval.ival = OP_GLOB;
6646 s = scan_str(start,FALSE,FALSE);
6648 Perl_croak(aTHX_ "Glob not terminated");
6652 /* we're in a filehandle read situation */
6655 /* turn <> into <ARGV> */
6657 (void)strcpy(d,"ARGV");
6659 /* if <$fh>, create the ops to turn the variable into a
6665 /* try to find it in the pad for this block, otherwise find
6666 add symbol table ops
6668 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6669 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
6670 if (SvFLAGS(namesv) & SVpad_OUR) {
6671 SV *sym = sv_2mortal(newSVpv(HvNAME(GvSTASH(namesv)),0));
6672 sv_catpvn(sym, "::", 2);
6678 OP *o = newOP(OP_PADSV, 0);
6680 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6689 ? (GV_ADDMULTI | GV_ADDINEVAL)
6692 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6693 newUNOP(OP_RV2SV, 0,
6694 newGVOP(OP_GV, 0, gv)));
6696 PL_lex_op->op_flags |= OPf_SPECIAL;
6697 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6698 yylval.ival = OP_NULL;
6701 /* If it's none of the above, it must be a literal filehandle
6702 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6704 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6705 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6706 yylval.ival = OP_NULL;
6715 takes: start position in buffer
6716 keep_quoted preserve \ on the embedded delimiter(s)
6717 keep_delims preserve the delimiters around the string
6718 returns: position to continue reading from buffer
6719 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6720 updates the read buffer.
6722 This subroutine pulls a string out of the input. It is called for:
6723 q single quotes q(literal text)
6724 ' single quotes 'literal text'
6725 qq double quotes qq(interpolate $here please)
6726 " double quotes "interpolate $here please"
6727 qx backticks qx(/bin/ls -l)
6728 ` backticks `/bin/ls -l`
6729 qw quote words @EXPORT_OK = qw( func() $spam )
6730 m// regexp match m/this/
6731 s/// regexp substitute s/this/that/
6732 tr/// string transliterate tr/this/that/
6733 y/// string transliterate y/this/that/
6734 ($*@) sub prototypes sub foo ($)
6735 (stuff) sub attr parameters sub foo : attr(stuff)
6736 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6738 In most of these cases (all but <>, patterns and transliterate)
6739 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6740 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6741 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6744 It skips whitespace before the string starts, and treats the first
6745 character as the delimiter. If the delimiter is one of ([{< then
6746 the corresponding "close" character )]}> is used as the closing
6747 delimiter. It allows quoting of delimiters, and if the string has
6748 balanced delimiters ([{<>}]) it allows nesting.
6750 On success, the SV with the resulting string is put into lex_stuff or,
6751 if that is already non-NULL, into lex_repl. The second case occurs only
6752 when parsing the RHS of the special constructs s/// and tr/// (y///).
6753 For convenience, the terminating delimiter character is stuffed into
6758 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6760 SV *sv; /* scalar value: string */
6761 char *tmps; /* temp string, used for delimiter matching */
6762 register char *s = start; /* current position in the buffer */
6763 register char term; /* terminating character */
6764 register char *to; /* current position in the sv's data */
6765 I32 brackets = 1; /* bracket nesting level */
6766 bool has_utf8 = FALSE; /* is there any utf8 content? */
6768 /* skip space before the delimiter */
6772 /* mark where we are, in case we need to report errors */
6775 /* after skipping whitespace, the next character is the terminator */
6777 if (!UTF8_IS_INVARIANT((U8)term) && UTF)
6780 /* mark where we are */
6781 PL_multi_start = CopLINE(PL_curcop);
6782 PL_multi_open = term;
6784 /* find corresponding closing delimiter */
6785 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6787 PL_multi_close = term;
6789 /* create a new SV to hold the contents. 87 is leak category, I'm
6790 assuming. 79 is the SV's initial length. What a random number. */
6792 sv_upgrade(sv, SVt_PVIV);
6794 (void)SvPOK_only(sv); /* validate pointer */
6796 /* move past delimiter and try to read a complete string */
6798 sv_catpvn(sv, s, 1);
6801 /* extend sv if need be */
6802 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6803 /* set 'to' to the next character in the sv's string */
6804 to = SvPVX(sv)+SvCUR(sv);
6806 /* if open delimiter is the close delimiter read unbridle */
6807 if (PL_multi_open == PL_multi_close) {
6808 for (; s < PL_bufend; s++,to++) {
6809 /* embedded newlines increment the current line number */
6810 if (*s == '\n' && !PL_rsfp)
6811 CopLINE_inc(PL_curcop);
6812 /* handle quoted delimiters */
6813 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6814 if (!keep_quoted && s[1] == term)
6816 /* any other quotes are simply copied straight through */
6820 /* terminate when run out of buffer (the for() condition), or
6821 have found the terminator */
6822 else if (*s == term)
6824 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6830 /* if the terminator isn't the same as the start character (e.g.,
6831 matched brackets), we have to allow more in the quoting, and
6832 be prepared for nested brackets.
6835 /* read until we run out of string, or we find the terminator */
6836 for (; s < PL_bufend; s++,to++) {
6837 /* embedded newlines increment the line count */
6838 if (*s == '\n' && !PL_rsfp)
6839 CopLINE_inc(PL_curcop);
6840 /* backslashes can escape the open or closing characters */
6841 if (*s == '\\' && s+1 < PL_bufend) {
6843 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6848 /* allow nested opens and closes */
6849 else if (*s == PL_multi_close && --brackets <= 0)
6851 else if (*s == PL_multi_open)
6853 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6858 /* terminate the copied string and update the sv's end-of-string */
6860 SvCUR_set(sv, to - SvPVX(sv));
6863 * this next chunk reads more into the buffer if we're not done yet
6867 break; /* handle case where we are done yet :-) */
6869 #ifndef PERL_STRICT_CR
6870 if (to - SvPVX(sv) >= 2) {
6871 if ((to[-2] == '\r' && to[-1] == '\n') ||
6872 (to[-2] == '\n' && to[-1] == '\r'))
6876 SvCUR_set(sv, to - SvPVX(sv));
6878 else if (to[-1] == '\r')
6881 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6885 /* if we're out of file, or a read fails, bail and reset the current
6886 line marker so we can report where the unterminated string began
6889 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6891 CopLINE_set(PL_curcop, PL_multi_start);
6894 /* we read a line, so increment our line counter */
6895 CopLINE_inc(PL_curcop);
6897 /* update debugger info */
6898 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6899 SV *sv = NEWSV(88,0);
6901 sv_upgrade(sv, SVt_PVMG);
6902 sv_setsv(sv,PL_linestr);
6905 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6908 /* having changed the buffer, we must update PL_bufend */
6909 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6910 PL_last_lop = PL_last_uni = Nullch;
6913 /* at this point, we have successfully read the delimited string */
6916 sv_catpvn(sv, s, 1);
6919 PL_multi_end = CopLINE(PL_curcop);
6922 /* if we allocated too much space, give some back */
6923 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6924 SvLEN_set(sv, SvCUR(sv) + 1);
6925 Renew(SvPVX(sv), SvLEN(sv), char);
6928 /* decide whether this is the first or second quoted string we've read
6941 takes: pointer to position in buffer
6942 returns: pointer to new position in buffer
6943 side-effects: builds ops for the constant in yylval.op
6945 Read a number in any of the formats that Perl accepts:
6947 \d(_?\d)*(\.(\d(_?\d)*)?)?[Ee][\+\-]?(\d(_?\d)*) 12 12.34 12.
6948 \.\d(_?\d)*[Ee][\+\-]?(\d(_?\d)*) .34
6951 0x[0-9A-Fa-f](_?[0-9A-Fa-f])*
6953 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6956 If it reads a number without a decimal point or an exponent, it will
6957 try converting the number to an integer and see if it can do so
6958 without loss of precision.
6962 Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
6964 register char *s = start; /* current position in buffer */
6965 register char *d; /* destination in temp buffer */
6966 register char *e; /* end of temp buffer */
6967 NV nv; /* number read, as a double */
6968 SV *sv = Nullsv; /* place to put the converted number */
6969 bool floatit; /* boolean: int or float? */
6970 char *lastub = 0; /* position of last underbar */
6971 static char number_too_long[] = "Number too long";
6973 /* We use the first character to decide what type of number this is */
6977 Perl_croak(aTHX_ "panic: scan_num");
6979 /* if it starts with a 0, it could be an octal number, a decimal in
6980 0.13 disguise, or a hexadecimal number, or a binary number. */
6984 u holds the "number so far"
6985 shift the power of 2 of the base
6986 (hex == 4, octal == 3, binary == 1)
6987 overflowed was the number more than we can hold?
6989 Shift is used when we add a digit. It also serves as an "are
6990 we in octal/hex/binary?" indicator to disallow hex characters
6996 bool overflowed = FALSE;
6997 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6998 static char* bases[5] = { "", "binary", "", "octal",
7000 static char* Bases[5] = { "", "Binary", "", "Octal",
7002 static char *maxima[5] = { "",
7003 "0b11111111111111111111111111111111",
7007 char *base, *Base, *max;
7013 } else if (s[1] == 'b') {
7017 /* check for a decimal in disguise */
7018 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
7020 /* so it must be octal */
7027 if (ckWARN(WARN_SYNTAX))
7028 Perl_warner(aTHX_ WARN_SYNTAX,
7029 "Misplaced _ in number");
7033 base = bases[shift];
7034 Base = Bases[shift];
7035 max = maxima[shift];
7037 /* read the rest of the number */
7039 /* x is used in the overflow test,
7040 b is the digit we're adding on. */
7045 /* if we don't mention it, we're done */
7049 /* _ are ignored -- but warned about if consecutive */
7051 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7052 Perl_warner(aTHX_ WARN_SYNTAX,
7053 "Misplaced _ in number");
7057 /* 8 and 9 are not octal */
7060 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
7064 case '2': case '3': case '4':
7065 case '5': case '6': case '7':
7067 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
7071 b = *s++ & 15; /* ASCII digit -> value of digit */
7075 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
7076 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
7077 /* make sure they said 0x */
7082 /* Prepare to put the digit we have onto the end
7083 of the number so far. We check for overflows.
7088 x = u << shift; /* make room for the digit */
7090 if ((x >> shift) != u
7091 && !(PL_hints & HINT_NEW_BINARY)) {
7094 if (ckWARN_d(WARN_OVERFLOW))
7095 Perl_warner(aTHX_ WARN_OVERFLOW,
7096 "Integer overflow in %s number",
7099 u = x | b; /* add the digit to the end */
7102 n *= nvshift[shift];
7103 /* If an NV has not enough bits in its
7104 * mantissa to represent an UV this summing of
7105 * small low-order numbers is a waste of time
7106 * (because the NV cannot preserve the
7107 * low-order bits anyway): we could just
7108 * remember when did we overflow and in the
7109 * end just multiply n by the right
7117 /* if we get here, we had success: make a scalar value from
7122 /* final misplaced underbar check */
7124 if (ckWARN(WARN_SYNTAX))
7125 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7130 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7131 Perl_warner(aTHX_ WARN_PORTABLE,
7132 "%s number > %s non-portable",
7138 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7139 Perl_warner(aTHX_ WARN_PORTABLE,
7140 "%s number > %s non-portable",
7145 if (PL_hints & HINT_NEW_BINARY)
7146 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
7151 handle decimal numbers.
7152 we're also sent here when we read a 0 as the first digit
7154 case '1': case '2': case '3': case '4': case '5':
7155 case '6': case '7': case '8': case '9': case '.':
7158 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
7161 /* read next group of digits and _ and copy into d */
7162 while (isDIGIT(*s) || *s == '_') {
7163 /* skip underscores, checking for misplaced ones
7167 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7168 Perl_warner(aTHX_ WARN_SYNTAX,
7169 "Misplaced _ in number");
7173 /* check for end of fixed-length buffer */
7175 Perl_croak(aTHX_ number_too_long);
7176 /* if we're ok, copy the character */
7181 /* final misplaced underbar check */
7182 if (lastub && s == lastub + 1) {
7183 if (ckWARN(WARN_SYNTAX))
7184 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7187 /* read a decimal portion if there is one. avoid
7188 3..5 being interpreted as the number 3. followed
7191 if (*s == '.' && s[1] != '.') {
7196 if (ckWARN(WARN_SYNTAX))
7197 Perl_warner(aTHX_ WARN_SYNTAX,
7198 "Misplaced _ in number");
7202 /* copy, ignoring underbars, until we run out of digits.
7204 for (; isDIGIT(*s) || *s == '_'; s++) {
7205 /* fixed length buffer check */
7207 Perl_croak(aTHX_ number_too_long);
7209 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7210 Perl_warner(aTHX_ WARN_SYNTAX,
7211 "Misplaced _ in number");
7217 /* fractional part ending in underbar? */
7219 if (ckWARN(WARN_SYNTAX))
7220 Perl_warner(aTHX_ WARN_SYNTAX,
7221 "Misplaced _ in number");
7223 if (*s == '.' && isDIGIT(s[1])) {
7224 /* oops, it's really a v-string, but without the "v" */
7230 /* read exponent part, if present */
7231 if (*s && strchr("eE",*s) && strchr("+-0123456789_", s[1])) {
7235 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
7236 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
7238 /* stray preinitial _ */
7240 if (ckWARN(WARN_SYNTAX))
7241 Perl_warner(aTHX_ WARN_SYNTAX,
7242 "Misplaced _ in number");
7246 /* allow positive or negative exponent */
7247 if (*s == '+' || *s == '-')
7250 /* stray initial _ */
7252 if (ckWARN(WARN_SYNTAX))
7253 Perl_warner(aTHX_ WARN_SYNTAX,
7254 "Misplaced _ in number");
7258 /* read digits of exponent */
7259 while (isDIGIT(*s) || *s == '_') {
7262 Perl_croak(aTHX_ number_too_long);
7266 if (ckWARN(WARN_SYNTAX) &&
7267 ((lastub && s == lastub + 1) ||
7268 (!isDIGIT(s[1]) && s[1] != '_')))
7269 Perl_warner(aTHX_ WARN_SYNTAX,
7270 "Misplaced _ in number");
7277 /* make an sv from the string */
7281 We try to do an integer conversion first if no characters
7282 indicating "float" have been found.
7287 int flags = grok_number (PL_tokenbuf, d - PL_tokenbuf, &uv);
7289 if (flags == IS_NUMBER_IN_UV) {
7291 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7294 } else if (flags == (IS_NUMBER_IN_UV | IS_NUMBER_NEG)) {
7295 if (uv <= (UV) IV_MIN)
7296 sv_setiv(sv, -(IV)uv);
7303 /* terminate the string */
7305 nv = Atof(PL_tokenbuf);
7309 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7310 (PL_hints & HINT_NEW_INTEGER) )
7311 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7312 (floatit ? "float" : "integer"),
7316 /* if it starts with a v, it could be a v-string */
7322 while (isDIGIT(*pos) || *pos == '_')
7324 if (!isALPHA(*pos)) {
7326 U8 tmpbuf[UTF8_MAXLEN+1];
7328 s++; /* get past 'v' */
7331 sv_setpvn(sv, "", 0);
7334 if (*s == '0' && isDIGIT(s[1]))
7335 yyerror("Octal number in vector unsupported");
7338 /* this is atoi() that tolerates underscores */
7341 while (--end >= s) {
7346 rev += (*end - '0') * mult;
7348 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7349 Perl_warner(aTHX_ WARN_OVERFLOW,
7350 "Integer overflow in decimal number");
7353 /* Append native character for the rev point */
7354 tmpend = uvchr_to_utf8(tmpbuf, rev);
7355 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7356 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
7358 if (*pos == '.' && isDIGIT(pos[1]))
7364 while (isDIGIT(*pos) || *pos == '_')
7374 /* make the op for the constant and return */
7377 lvalp->opval = newSVOP(OP_CONST, 0, sv);
7379 lvalp->opval = Nullop;
7385 S_scan_formline(pTHX_ register char *s)
7389 SV *stuff = newSVpvn("",0);
7390 bool needargs = FALSE;
7393 if (*s == '.' || *s == /*{*/'}') {
7395 #ifdef PERL_STRICT_CR
7396 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7398 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7400 if (*t == '\n' || t == PL_bufend)
7403 if (PL_in_eval && !PL_rsfp) {
7404 eol = strchr(s,'\n');
7409 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7411 for (t = s; t < eol; t++) {
7412 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7414 goto enough; /* ~~ must be first line in formline */
7416 if (*t == '@' || *t == '^')
7420 sv_catpvn(stuff, s, eol-s);
7421 #ifndef PERL_STRICT_CR
7422 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7423 char *end = SvPVX(stuff) + SvCUR(stuff);
7435 s = filter_gets(PL_linestr, PL_rsfp, 0);
7436 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7437 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7438 PL_last_lop = PL_last_uni = Nullch;
7441 yyerror("Format not terminated");
7451 PL_lex_state = LEX_NORMAL;
7452 PL_nextval[PL_nexttoke].ival = 0;
7456 PL_lex_state = LEX_FORMLINE;
7457 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7459 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7463 SvREFCNT_dec(stuff);
7464 PL_lex_formbrack = 0;
7475 PL_cshlen = strlen(PL_cshname);
7480 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7482 I32 oldsavestack_ix = PL_savestack_ix;
7483 CV* outsidecv = PL_compcv;
7487 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7489 SAVEI32(PL_subline);
7490 save_item(PL_subname);
7493 SAVESPTR(PL_comppad_name);
7494 SAVESPTR(PL_compcv);
7495 SAVEI32(PL_comppad_name_fill);
7496 SAVEI32(PL_min_intro_pending);
7497 SAVEI32(PL_max_intro_pending);
7498 SAVEI32(PL_pad_reset_pending);
7500 PL_compcv = (CV*)NEWSV(1104,0);
7501 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7502 CvFLAGS(PL_compcv) |= flags;
7504 PL_comppad = newAV();
7505 av_push(PL_comppad, Nullsv);
7506 PL_curpad = AvARRAY(PL_comppad);
7507 PL_comppad_name = newAV();
7508 PL_comppad_name_fill = 0;
7509 PL_min_intro_pending = 0;
7511 PL_subline = CopLINE(PL_curcop);
7512 #ifdef USE_5005THREADS
7513 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7514 PL_curpad[0] = (SV*)newAV();
7515 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7516 #endif /* USE_5005THREADS */
7518 comppadlist = newAV();
7519 AvREAL_off(comppadlist);
7520 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7521 av_store(comppadlist, 1, (SV*)PL_comppad);
7523 CvPADLIST(PL_compcv) = comppadlist;
7524 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7525 #ifdef USE_5005THREADS
7526 CvOWNER(PL_compcv) = 0;
7527 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7528 MUTEX_INIT(CvMUTEXP(PL_compcv));
7529 #endif /* USE_5005THREADS */
7531 return oldsavestack_ix;
7535 #pragma segment Perl_yylex
7538 Perl_yywarn(pTHX_ char *s)
7540 PL_in_eval |= EVAL_WARNONLY;
7542 PL_in_eval &= ~EVAL_WARNONLY;
7547 Perl_yyerror(pTHX_ char *s)
7550 char *context = NULL;
7554 if (!yychar || (yychar == ';' && !PL_rsfp))
7556 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7557 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7558 while (isSPACE(*PL_oldoldbufptr))
7560 context = PL_oldoldbufptr;
7561 contlen = PL_bufptr - PL_oldoldbufptr;
7563 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7564 PL_oldbufptr != PL_bufptr) {
7565 while (isSPACE(*PL_oldbufptr))
7567 context = PL_oldbufptr;
7568 contlen = PL_bufptr - PL_oldbufptr;
7570 else if (yychar > 255)
7571 where = "next token ???";
7572 #ifdef USE_PURE_BISON
7573 /* GNU Bison sets the value -2 */
7574 else if (yychar == -2) {
7576 else if ((yychar & 127) == 127) {
7578 if (PL_lex_state == LEX_NORMAL ||
7579 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7580 where = "at end of line";
7581 else if (PL_lex_inpat)
7582 where = "within pattern";
7584 where = "within string";
7587 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7589 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7590 else if (isPRINT_LC(yychar))
7591 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7593 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7594 where = SvPVX(where_sv);
7596 msg = sv_2mortal(newSVpv(s, 0));
7597 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7598 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7600 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7602 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7603 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7604 Perl_sv_catpvf(aTHX_ msg,
7605 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7606 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7609 if (PL_in_eval & EVAL_WARNONLY)
7610 Perl_warn(aTHX_ "%"SVf, msg);
7613 if (PL_error_count >= 10) {
7614 if (PL_in_eval && SvCUR(ERRSV))
7615 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7616 ERRSV, CopFILE(PL_curcop));
7618 Perl_croak(aTHX_ "%s has too many errors.\n",
7619 CopFILE(PL_curcop));
7622 PL_in_my_stash = Nullhv;
7626 #pragma segment Main
7630 S_swallow_bom(pTHX_ U8 *s)
7633 slen = SvCUR(PL_linestr);
7637 /* UTF-16 little-endian */
7638 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7639 Perl_croak(aTHX_ "Unsupported script encoding");
7640 #ifndef PERL_NO_UTF16_FILTER
7641 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7643 if (PL_bufend > (char*)s) {
7647 filter_add(utf16rev_textfilter, NULL);
7648 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7649 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7650 PL_bufend - (char*)s - 1,
7652 Copy(news, s, newlen, U8);
7653 SvCUR_set(PL_linestr, newlen);
7654 PL_bufend = SvPVX(PL_linestr) + newlen;
7655 news[newlen++] = '\0';
7659 Perl_croak(aTHX_ "Unsupported script encoding");
7664 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7665 #ifndef PERL_NO_UTF16_FILTER
7666 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7668 if (PL_bufend > (char *)s) {
7672 filter_add(utf16_textfilter, NULL);
7673 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7674 PL_bufend = (char*)utf16_to_utf8(s, news,
7675 PL_bufend - (char*)s,
7677 Copy(news, s, newlen, U8);
7678 SvCUR_set(PL_linestr, newlen);
7679 PL_bufend = SvPVX(PL_linestr) + newlen;
7680 news[newlen++] = '\0';
7684 Perl_croak(aTHX_ "Unsupported script encoding");
7689 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7690 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7695 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7696 s[2] == 0xFE && s[3] == 0xFF)
7698 Perl_croak(aTHX_ "Unsupported script encoding");
7706 * Restore a source filter.
7710 restore_rsfp(pTHX_ void *f)
7712 PerlIO *fp = (PerlIO*)f;
7714 if (PL_rsfp == PerlIO_stdin())
7715 PerlIO_clearerr(PL_rsfp);
7716 else if (PL_rsfp && (PL_rsfp != fp))
7717 PerlIO_close(PL_rsfp);
7721 #ifndef PERL_NO_UTF16_FILTER
7723 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen)
7725 I32 count = FILTER_READ(idx+1, sv, maxlen);
7730 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7731 if (!*SvPV_nolen(sv))
7732 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7735 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7736 sv_usepvn(sv, (char*)tmps, tend - tmps);
7742 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen)
7744 I32 count = FILTER_READ(idx+1, sv, maxlen);
7749 if (!*SvPV_nolen(sv))
7750 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7753 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7754 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7755 sv_usepvn(sv, (char*)tmps, tend - tmps);