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(pTHXo_ void *f);
31 #ifndef PERL_NO_UTF16_FILTER
32 static I32 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
33 static I32 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
36 #define XFAKEBRACK 128
40 /* For now 'use utf8' does not affect tokenizer on EBCDIC */
41 #define UTF (PL_linestr && DO_UTF8(PL_linestr))
43 #define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
46 /* In variables name $^X, these are the legal values for X.
47 * 1999-02-27 mjd-perl-patch@plover.com */
48 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
50 /* On MacOS, respect nonbreaking spaces */
51 #ifdef MACOS_TRADITIONAL
52 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
54 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
57 /* LEX_* are values for PL_lex_state, the state of the lexer.
58 * They are arranged oddly so that the guard on the switch statement
59 * can get by with a single comparison (if the compiler is smart enough).
62 /* #define LEX_NOTPARSING 11 is done in perl.h. */
65 #define LEX_INTERPNORMAL 9
66 #define LEX_INTERPCASEMOD 8
67 #define LEX_INTERPPUSH 7
68 #define LEX_INTERPSTART 6
69 #define LEX_INTERPEND 5
70 #define LEX_INTERPENDMAYBE 4
71 #define LEX_INTERPCONCAT 3
72 #define LEX_INTERPCONST 2
73 #define LEX_FORMLINE 1
74 #define LEX_KNOWNEXT 0
82 # define YYMAXLEVEL 100
84 YYSTYPE* yylval_pointer[YYMAXLEVEL];
85 int* yychar_pointer[YYMAXLEVEL];
89 # define yylval (*yylval_pointer[yyactlevel])
90 # define yychar (*yychar_pointer[yyactlevel])
91 # define PERL_YYLEX_PARAM yylval_pointer[yyactlevel],yychar_pointer[yyactlevel]
93 # define yylex() Perl_yylex_r(aTHX_ yylval_pointer[yyactlevel],yychar_pointer[yyactlevel])
98 /* CLINE is a macro that ensures PL_copline has a sane value */
103 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
106 * Convenience functions to return different tokens and prime the
107 * lexer for the next token. They all take an argument.
109 * TOKEN : generic token (used for '(', DOLSHARP, etc)
110 * OPERATOR : generic operator
111 * AOPERATOR : assignment operator
112 * PREBLOCK : beginning the block after an if, while, foreach, ...
113 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
114 * PREREF : *EXPR where EXPR is not a simple identifier
115 * TERM : expression term
116 * LOOPX : loop exiting command (goto, last, dump, etc)
117 * FTST : file test operator
118 * FUN0 : zero-argument function
119 * FUN1 : not used, except for not, which isn't a UNIOP
120 * BOop : bitwise or or xor
122 * SHop : shift operator
123 * PWop : power operator
124 * PMop : pattern-matching operator
125 * Aop : addition-level operator
126 * Mop : multiplication-level operator
127 * Eop : equality-testing operator
128 * Rop : relational operator <= != gt
130 * Also see LOP and lop() below.
133 /* Note that REPORT() and REPORT2() will be expressions that supply
134 * their own trailing comma, not suitable for statements as such. */
135 #ifdef DEBUGGING /* Serve -DT. */
136 # define REPORT(x,retval) tokereport(x,s,(int)retval),
137 # define REPORT2(x,retval) tokereport(x,s, yylval.ival),
139 # define REPORT(x,retval)
140 # define REPORT2(x,retval)
143 #define TOKEN(retval) return (REPORT2("token",retval) PL_bufptr = s,(int)retval)
144 #define OPERATOR(retval) return (REPORT2("operator",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval)
145 #define AOPERATOR(retval) return ao((REPORT2("aop",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval))
146 #define PREBLOCK(retval) return (REPORT2("preblock",retval) PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
147 #define PRETERMBLOCK(retval) return (REPORT2("pretermblock",retval) PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
148 #define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
149 #define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
150 #define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
151 #define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
152 #define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
153 #define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
154 #define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
155 #define BAop(f) return ao((yylval.ival=f, REPORT("bitandop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
156 #define SHop(f) return ao((yylval.ival=f, REPORT("shiftop",f) PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
157 #define PWop(f) return ao((yylval.ival=f, REPORT("powop",f) PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
158 #define PMop(f) return(yylval.ival=f, REPORT("matchop",f) PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
159 #define Aop(f) return ao((yylval.ival=f, REPORT("add",f) PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
160 #define Mop(f) return ao((yylval.ival=f, REPORT("mul",f) PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
161 #define Eop(f) return(yylval.ival=f, REPORT("eq",f) PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
162 #define Rop(f) return(yylval.ival=f, REPORT("rel",f) PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
164 /* This bit of chicanery makes a unary function followed by
165 * a parenthesis into a function with one argument, highest precedence.
167 #define UNI(f) return(yylval.ival = f, \
171 PL_last_uni = PL_oldbufptr, \
172 PL_last_lop_op = f, \
173 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
175 #define UNIBRACK(f) return(yylval.ival = f, \
178 PL_last_uni = PL_oldbufptr, \
179 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
181 /* grandfather return to old style */
182 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
185 S_tokereport(pTHX_ char *thing, char* s, I32 rv)
189 report = newSVpv(thing, 0);
190 Perl_sv_catpvf(aTHX_ report, ":line %d:%"IVdf":", CopLINE(PL_curcop),
193 if (s - PL_bufptr > 0)
194 sv_catpvn(report, PL_bufptr, s - PL_bufptr);
196 if (PL_oldbufptr && *PL_oldbufptr)
197 sv_catpv(report, PL_tokenbuf);
199 PerlIO_printf(Perl_debug_log, "### %s\n", SvPV_nolen(report));
206 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
207 * into an OP_ANDASSIGN or OP_ORASSIGN
211 S_ao(pTHX_ int toketype)
213 if (*PL_bufptr == '=') {
215 if (toketype == ANDAND)
216 yylval.ival = OP_ANDASSIGN;
217 else if (toketype == OROR)
218 yylval.ival = OP_ORASSIGN;
226 * When Perl expects an operator and finds something else, no_op
227 * prints the warning. It always prints "<something> found where
228 * operator expected. It prints "Missing semicolon on previous line?"
229 * if the surprise occurs at the start of the line. "do you need to
230 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
231 * where the compiler doesn't know if foo is a method call or a function.
232 * It prints "Missing operator before end of line" if there's nothing
233 * after the missing operator, or "... before <...>" if there is something
234 * after the missing operator.
238 S_no_op(pTHX_ char *what, char *s)
240 char *oldbp = PL_bufptr;
241 bool is_first = (PL_oldbufptr == PL_linestart);
247 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
249 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
250 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
252 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
253 if (t < PL_bufptr && isSPACE(*t))
254 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
255 t - PL_oldoldbufptr, PL_oldoldbufptr);
259 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
266 * Complain about missing quote/regexp/heredoc terminator.
267 * If it's called with (char *)NULL then it cauterizes the line buffer.
268 * If we're in a delimited string and the delimiter is a control
269 * character, it's reformatted into a two-char sequence like ^C.
274 S_missingterm(pTHX_ char *s)
279 char *nl = strrchr(s,'\n');
285 iscntrl(PL_multi_close)
287 PL_multi_close < 32 || PL_multi_close == 127
291 tmpbuf[1] = toCTRL(PL_multi_close);
297 *tmpbuf = PL_multi_close;
301 q = strchr(s,'"') ? '\'' : '"';
302 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
310 Perl_deprecate(pTHX_ char *s)
312 if (ckWARN(WARN_DEPRECATED))
313 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
318 * Deprecate a comma-less variable list.
324 deprecate("comma-less variable list");
328 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
329 * utf16-to-utf8-reversed.
332 #ifdef PERL_CR_FILTER
336 register char *s = SvPVX(sv);
337 register char *e = s + SvCUR(sv);
338 /* outer loop optimized to do nothing if there are no CR-LFs */
340 if (*s++ == '\r' && *s == '\n') {
341 /* hit a CR-LF, need to copy the rest */
342 register char *d = s - 1;
345 if (*s == '\r' && s[1] == '\n')
356 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
358 I32 count = FILTER_READ(idx+1, sv, maxlen);
359 if (count > 0 && !maxlen)
367 * Initialize variables. Uses the Perl save_stack to save its state (for
368 * recursive calls to the parser).
372 Perl_lex_start(pTHX_ SV *line)
377 SAVEI32(PL_lex_dojoin);
378 SAVEI32(PL_lex_brackets);
379 SAVEI32(PL_lex_casemods);
380 SAVEI32(PL_lex_starts);
381 SAVEI32(PL_lex_state);
382 SAVEVPTR(PL_lex_inpat);
383 SAVEI32(PL_lex_inwhat);
384 if (PL_lex_state == LEX_KNOWNEXT) {
385 I32 toke = PL_nexttoke;
386 while (--toke >= 0) {
387 SAVEI32(PL_nexttype[toke]);
388 SAVEVPTR(PL_nextval[toke]);
390 SAVEI32(PL_nexttoke);
392 SAVECOPLINE(PL_curcop);
395 SAVEPPTR(PL_oldbufptr);
396 SAVEPPTR(PL_oldoldbufptr);
397 SAVEPPTR(PL_last_lop);
398 SAVEPPTR(PL_last_uni);
399 SAVEPPTR(PL_linestart);
400 SAVESPTR(PL_linestr);
401 SAVEPPTR(PL_lex_brackstack);
402 SAVEPPTR(PL_lex_casestack);
403 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
404 SAVESPTR(PL_lex_stuff);
405 SAVEI32(PL_lex_defer);
406 SAVEI32(PL_sublex_info.sub_inwhat);
407 SAVESPTR(PL_lex_repl);
409 SAVEINT(PL_lex_expect);
411 PL_lex_state = LEX_NORMAL;
415 New(899, PL_lex_brackstack, 120, char);
416 New(899, PL_lex_casestack, 12, char);
417 SAVEFREEPV(PL_lex_brackstack);
418 SAVEFREEPV(PL_lex_casestack);
420 *PL_lex_casestack = '\0';
423 PL_lex_stuff = Nullsv;
424 PL_lex_repl = Nullsv;
428 PL_sublex_info.sub_inwhat = 0;
430 if (SvREADONLY(PL_linestr))
431 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
432 s = SvPV(PL_linestr, len);
433 if (len && s[len-1] != ';') {
434 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
435 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
436 sv_catpvn(PL_linestr, "\n;", 2);
438 SvTEMP_off(PL_linestr);
439 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
440 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
441 PL_last_lop = PL_last_uni = Nullch;
443 PL_rs = newSVpvn("\n", 1);
449 * Finalizer for lexing operations. Must be called when the parser is
450 * done with the lexer.
456 PL_doextract = FALSE;
461 * This subroutine has nothing to do with tilting, whether at windmills
462 * or pinball tables. Its name is short for "increment line". It
463 * increments the current line number in CopLINE(PL_curcop) and checks
464 * to see whether the line starts with a comment of the form
465 * # line 500 "foo.pm"
466 * If so, it sets the current line number and file to the values in the comment.
470 S_incline(pTHX_ char *s)
477 CopLINE_inc(PL_curcop);
480 while (SPACE_OR_TAB(*s)) s++;
481 if (strnEQ(s, "line", 4))
485 if (SPACE_OR_TAB(*s))
489 while (SPACE_OR_TAB(*s)) s++;
495 while (SPACE_OR_TAB(*s))
497 if (*s == '"' && (t = strchr(s+1, '"'))) {
502 for (t = s; !isSPACE(*t); t++) ;
505 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
507 if (*e != '\n' && *e != '\0')
508 return; /* false alarm */
514 Safefree(CopFILE(PL_curcop));
516 SvREFCNT_dec(CopFILEGV(PL_curcop));
518 CopFILE_set(PL_curcop, s);
521 CopLINE_set(PL_curcop, atoi(n)-1);
526 * Called to gobble the appropriate amount and type of whitespace.
527 * Skips comments as well.
531 S_skipspace(pTHX_ register char *s)
533 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
534 while (s < PL_bufend && SPACE_OR_TAB(*s))
540 SSize_t oldprevlen, oldoldprevlen;
541 SSize_t oldloplen, oldunilen;
542 while (s < PL_bufend && isSPACE(*s)) {
543 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
548 if (s < PL_bufend && *s == '#') {
549 while (s < PL_bufend && *s != '\n')
553 if (PL_in_eval && !PL_rsfp) {
560 /* only continue to recharge the buffer if we're at the end
561 * of the buffer, we're not reading from a source filter, and
562 * we're in normal lexing mode
564 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
565 PL_lex_state == LEX_FORMLINE)
568 /* try to recharge the buffer */
569 if ((s = filter_gets(PL_linestr, PL_rsfp,
570 (prevlen = SvCUR(PL_linestr)))) == Nullch)
572 /* end of file. Add on the -p or -n magic */
573 if (PL_minus_n || PL_minus_p) {
574 sv_setpv(PL_linestr,PL_minus_p ?
575 ";}continue{print or die qq(-p destination: $!\\n)" :
577 sv_catpv(PL_linestr,";}");
578 PL_minus_n = PL_minus_p = 0;
581 sv_setpv(PL_linestr,";");
583 /* reset variables for next time we lex */
584 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
586 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
587 PL_last_lop = PL_last_uni = Nullch;
589 /* Close the filehandle. Could be from -P preprocessor,
590 * STDIN, or a regular file. If we were reading code from
591 * STDIN (because the commandline held no -e or filename)
592 * then we don't close it, we reset it so the code can
593 * read from STDIN too.
596 if (PL_preprocess && !PL_in_eval)
597 (void)PerlProc_pclose(PL_rsfp);
598 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
599 PerlIO_clearerr(PL_rsfp);
601 (void)PerlIO_close(PL_rsfp);
606 /* not at end of file, so we only read another line */
607 /* make corresponding updates to old pointers, for yyerror() */
608 oldprevlen = PL_oldbufptr - PL_bufend;
609 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
611 oldunilen = PL_last_uni - PL_bufend;
613 oldloplen = PL_last_lop - PL_bufend;
614 PL_linestart = PL_bufptr = s + prevlen;
615 PL_bufend = s + SvCUR(PL_linestr);
617 PL_oldbufptr = s + oldprevlen;
618 PL_oldoldbufptr = s + oldoldprevlen;
620 PL_last_uni = s + oldunilen;
622 PL_last_lop = s + oldloplen;
625 /* debugger active and we're not compiling the debugger code,
626 * so store the line into the debugger's array of lines
628 if (PERLDB_LINE && PL_curstash != PL_debstash) {
629 SV *sv = NEWSV(85,0);
631 sv_upgrade(sv, SVt_PVMG);
632 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
633 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
640 * Check the unary operators to ensure there's no ambiguity in how they're
641 * used. An ambiguous piece of code would be:
643 * This doesn't mean rand() + 5. Because rand() is a unary operator,
644 * the +5 is its argument.
653 if (PL_oldoldbufptr != PL_last_uni)
655 while (isSPACE(*PL_last_uni))
657 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
658 if ((t = strchr(s, '(')) && t < PL_bufptr)
660 if (ckWARN_d(WARN_AMBIGUOUS)){
663 Perl_warner(aTHX_ WARN_AMBIGUOUS,
664 "Warning: Use of \"%s\" without parens is ambiguous",
670 /* workaround to replace the UNI() macro with a function. Only the
671 * hints/uts.sh file mentions this. Other comments elsewhere in the
672 * source indicate Microport Unix might need it too.
678 #define UNI(f) return uni(f,s)
681 S_uni(pTHX_ I32 f, char *s)
686 PL_last_uni = PL_oldbufptr;
697 #endif /* CRIPPLED_CC */
700 * LOP : macro to build a list operator. Its behaviour has been replaced
701 * with a subroutine, S_lop() for which LOP is just another name.
704 #define LOP(f,x) return lop(f,x,s)
708 * Build a list operator (or something that might be one). The rules:
709 * - if we have a next token, then it's a list operator [why?]
710 * - if the next thing is an opening paren, then it's a function
711 * - else it's a list operator
715 S_lop(pTHX_ I32 f, int x, char *s)
722 PL_last_lop = PL_oldbufptr;
737 * When the lexer realizes it knows the next token (for instance,
738 * it is reordering tokens for the parser) then it can call S_force_next
739 * to know what token to return the next time the lexer is called. Caller
740 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
741 * handles the token correctly.
745 S_force_next(pTHX_ I32 type)
747 PL_nexttype[PL_nexttoke] = type;
749 if (PL_lex_state != LEX_KNOWNEXT) {
750 PL_lex_defer = PL_lex_state;
751 PL_lex_expect = PL_expect;
752 PL_lex_state = LEX_KNOWNEXT;
758 * When the lexer knows the next thing is a word (for instance, it has
759 * just seen -> and it knows that the next char is a word char, then
760 * it calls S_force_word to stick the next word into the PL_next lookahead.
763 * char *start : buffer position (must be within PL_linestr)
764 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
765 * int check_keyword : if true, Perl checks to make sure the word isn't
766 * a keyword (do this if the word is a label, e.g. goto FOO)
767 * int allow_pack : if true, : characters will also be allowed (require,
769 * int allow_initial_tick : used by the "sub" lexer only.
773 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
778 start = skipspace(start);
780 if (isIDFIRST_lazy_if(s,UTF) ||
781 (allow_pack && *s == ':') ||
782 (allow_initial_tick && *s == '\'') )
784 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
785 if (check_keyword && keyword(PL_tokenbuf, len))
787 if (token == METHOD) {
792 PL_expect = XOPERATOR;
795 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
796 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
804 * Called when the lexer wants $foo *foo &foo etc, but the program
805 * text only contains the "foo" portion. The first argument is a pointer
806 * to the "foo", and the second argument is the type symbol to prefix.
807 * Forces the next token to be a "WORD".
808 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
812 S_force_ident(pTHX_ register char *s, int kind)
815 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
816 PL_nextval[PL_nexttoke].opval = o;
819 o->op_private = OPpCONST_ENTERED;
820 /* XXX see note in pp_entereval() for why we forgo typo
821 warnings if the symbol must be introduced in an eval.
823 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
824 kind == '$' ? SVt_PV :
825 kind == '@' ? SVt_PVAV :
826 kind == '%' ? SVt_PVHV :
834 Perl_str_to_version(pTHX_ SV *sv)
839 char *start = SvPVx(sv,len);
840 bool utf = SvUTF8(sv) ? TRUE : FALSE;
841 char *end = start + len;
842 while (start < end) {
846 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
851 retval += ((NV)n)/nshift;
860 * Forces the next token to be a version number.
864 S_force_version(pTHX_ char *s)
866 OP *version = Nullop;
875 for (; isDIGIT(*d) || *d == '_' || *d == '.'; d++);
876 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
878 s = scan_num(s, &yylval);
879 version = yylval.opval;
880 ver = cSVOPx(version)->op_sv;
881 if (SvPOK(ver) && !SvNIOK(ver)) {
882 (void)SvUPGRADE(ver, SVt_PVNV);
883 SvNVX(ver) = str_to_version(ver);
884 SvNOK_on(ver); /* hint that it is a version */
889 /* NOTE: The parser sees the package name and the VERSION swapped */
890 PL_nextval[PL_nexttoke].opval = version;
898 * Tokenize a quoted string passed in as an SV. It finds the next
899 * chunk, up to end of string or a backslash. It may make a new
900 * SV containing that chunk (if HINT_NEW_STRING is on). It also
905 S_tokeq(pTHX_ SV *sv)
916 s = SvPV_force(sv, len);
917 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
920 while (s < send && *s != '\\')
925 if ( PL_hints & HINT_NEW_STRING ) {
926 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
932 if (s + 1 < send && (s[1] == '\\'))
933 s++; /* all that, just for this */
938 SvCUR_set(sv, d - SvPVX(sv));
940 if ( PL_hints & HINT_NEW_STRING )
941 return new_constant(NULL, 0, "q", sv, pv, "q");
946 * Now come three functions related to double-quote context,
947 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
948 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
949 * interact with PL_lex_state, and create fake ( ... ) argument lists
950 * to handle functions and concatenation.
951 * They assume that whoever calls them will be setting up a fake
952 * join call, because each subthing puts a ',' after it. This lets
955 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
957 * (I'm not sure whether the spurious commas at the end of lcfirst's
958 * arguments and join's arguments are created or not).
963 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
965 * Pattern matching will set PL_lex_op to the pattern-matching op to
966 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
968 * OP_CONST and OP_READLINE are easy--just make the new op and return.
970 * Everything else becomes a FUNC.
972 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
973 * had an OP_CONST or OP_READLINE). This just sets us up for a
974 * call to S_sublex_push().
980 register I32 op_type = yylval.ival;
982 if (op_type == OP_NULL) {
983 yylval.opval = PL_lex_op;
987 if (op_type == OP_CONST || op_type == OP_READLINE) {
988 SV *sv = tokeq(PL_lex_stuff);
990 if (SvTYPE(sv) == SVt_PVIV) {
991 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
997 nsv = newSVpvn(p, len);
1003 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
1004 PL_lex_stuff = Nullsv;
1008 PL_sublex_info.super_state = PL_lex_state;
1009 PL_sublex_info.sub_inwhat = op_type;
1010 PL_sublex_info.sub_op = PL_lex_op;
1011 PL_lex_state = LEX_INTERPPUSH;
1015 yylval.opval = PL_lex_op;
1025 * Create a new scope to save the lexing state. The scope will be
1026 * ended in S_sublex_done. Returns a '(', starting the function arguments
1027 * to the uc, lc, etc. found before.
1028 * Sets PL_lex_state to LEX_INTERPCONCAT.
1036 PL_lex_state = PL_sublex_info.super_state;
1037 SAVEI32(PL_lex_dojoin);
1038 SAVEI32(PL_lex_brackets);
1039 SAVEI32(PL_lex_casemods);
1040 SAVEI32(PL_lex_starts);
1041 SAVEI32(PL_lex_state);
1042 SAVEVPTR(PL_lex_inpat);
1043 SAVEI32(PL_lex_inwhat);
1044 SAVECOPLINE(PL_curcop);
1045 SAVEPPTR(PL_bufptr);
1046 SAVEPPTR(PL_oldbufptr);
1047 SAVEPPTR(PL_oldoldbufptr);
1048 SAVEPPTR(PL_last_lop);
1049 SAVEPPTR(PL_last_uni);
1050 SAVEPPTR(PL_linestart);
1051 SAVESPTR(PL_linestr);
1052 SAVEPPTR(PL_lex_brackstack);
1053 SAVEPPTR(PL_lex_casestack);
1055 PL_linestr = PL_lex_stuff;
1056 PL_lex_stuff = Nullsv;
1058 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1059 = SvPVX(PL_linestr);
1060 PL_bufend += SvCUR(PL_linestr);
1061 PL_last_lop = PL_last_uni = Nullch;
1062 SAVEFREESV(PL_linestr);
1064 PL_lex_dojoin = FALSE;
1065 PL_lex_brackets = 0;
1066 New(899, PL_lex_brackstack, 120, char);
1067 New(899, PL_lex_casestack, 12, char);
1068 SAVEFREEPV(PL_lex_brackstack);
1069 SAVEFREEPV(PL_lex_casestack);
1070 PL_lex_casemods = 0;
1071 *PL_lex_casestack = '\0';
1073 PL_lex_state = LEX_INTERPCONCAT;
1074 CopLINE_set(PL_curcop, PL_multi_start);
1076 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1077 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1078 PL_lex_inpat = PL_sublex_info.sub_op;
1080 PL_lex_inpat = Nullop;
1087 * Restores lexer state after a S_sublex_push.
1093 if (!PL_lex_starts++) {
1094 SV *sv = newSVpvn("",0);
1095 if (SvUTF8(PL_linestr))
1097 PL_expect = XOPERATOR;
1098 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1102 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1103 PL_lex_state = LEX_INTERPCASEMOD;
1107 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1108 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1109 PL_linestr = PL_lex_repl;
1111 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1112 PL_bufend += SvCUR(PL_linestr);
1113 PL_last_lop = PL_last_uni = Nullch;
1114 SAVEFREESV(PL_linestr);
1115 PL_lex_dojoin = FALSE;
1116 PL_lex_brackets = 0;
1117 PL_lex_casemods = 0;
1118 *PL_lex_casestack = '\0';
1120 if (SvEVALED(PL_lex_repl)) {
1121 PL_lex_state = LEX_INTERPNORMAL;
1123 /* we don't clear PL_lex_repl here, so that we can check later
1124 whether this is an evalled subst; that means we rely on the
1125 logic to ensure sublex_done() is called again only via the
1126 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1129 PL_lex_state = LEX_INTERPCONCAT;
1130 PL_lex_repl = Nullsv;
1136 PL_bufend = SvPVX(PL_linestr);
1137 PL_bufend += SvCUR(PL_linestr);
1138 PL_expect = XOPERATOR;
1139 PL_sublex_info.sub_inwhat = 0;
1147 Extracts a pattern, double-quoted string, or transliteration. This
1150 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1151 processing a pattern (PL_lex_inpat is true), a transliteration
1152 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1154 Returns a pointer to the character scanned up to. Iff this is
1155 advanced from the start pointer supplied (ie if anything was
1156 successfully parsed), will leave an OP for the substring scanned
1157 in yylval. Caller must intuit reason for not parsing further
1158 by looking at the next characters herself.
1162 double-quoted style: \r and \n
1163 regexp special ones: \D \s
1165 backrefs: \1 (deprecated in substitution replacements)
1166 case and quoting: \U \Q \E
1167 stops on @ and $, but not for $ as tail anchor
1169 In transliterations:
1170 characters are VERY literal, except for - not at the start or end
1171 of the string, which indicates a range. scan_const expands the
1172 range to the full set of intermediate characters.
1174 In double-quoted strings:
1176 double-quoted style: \r and \n
1178 backrefs: \1 (deprecated)
1179 case and quoting: \U \Q \E
1182 scan_const does *not* construct ops to handle interpolated strings.
1183 It stops processing as soon as it finds an embedded $ or @ variable
1184 and leaves it to the caller to work out what's going on.
1186 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1188 $ in pattern could be $foo or could be tail anchor. Assumption:
1189 it's a tail anchor if $ is the last thing in the string, or if it's
1190 followed by one of ")| \n\t"
1192 \1 (backreferences) are turned into $1
1194 The structure of the code is
1195 while (there's a character to process) {
1196 handle transliteration ranges
1197 skip regexp comments
1198 skip # initiated comments in //x patterns
1199 check for embedded @foo
1200 check for embedded scalars
1202 leave intact backslashes from leave (below)
1203 deprecate \1 in strings and sub replacements
1204 handle string-changing backslashes \l \U \Q \E, etc.
1205 switch (what was escaped) {
1206 handle - in a transliteration (becomes a literal -)
1207 handle \132 octal characters
1208 handle 0x15 hex characters
1209 handle \cV (control V)
1210 handle printf backslashes (\f, \r, \n, etc)
1212 } (end if backslash)
1213 } (end while character to read)
1218 S_scan_const(pTHX_ char *start)
1220 register char *send = PL_bufend; /* end of the constant */
1221 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1222 register char *s = start; /* start of the constant */
1223 register char *d = SvPVX(sv); /* destination for copies */
1224 bool dorange = FALSE; /* are we in a translit range? */
1225 bool didrange = FALSE; /* did we just finish a range? */
1226 I32 has_utf8 = FALSE; /* Output constant is UTF8 */
1227 I32 this_utf8 = UTF; /* The source string is assumed to be UTF8 */
1230 const char *leaveit = /* set of acceptably-backslashed characters */
1232 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1235 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1236 /* If we are doing a trans and we know we want UTF8 set expectation */
1237 has_utf8 = PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF);
1238 this_utf8 = PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1242 while (s < send || dorange) {
1243 /* get transliterations out of the way (they're most literal) */
1244 if (PL_lex_inwhat == OP_TRANS) {
1245 /* expand a range A-Z to the full set of characters. AIE! */
1247 I32 i; /* current expanded character */
1248 I32 min; /* first character in range */
1249 I32 max; /* last character in range */
1252 char *c = (char*)utf8_hop((U8*)d, -1);
1256 *c = UTF_TO_NATIVE(0xff);
1257 /* mark the range as done, and continue */
1263 i = d - SvPVX(sv); /* remember current offset */
1264 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1265 d = SvPVX(sv) + i; /* refresh d after realloc */
1266 d -= 2; /* eat the first char and the - */
1268 min = (U8)*d; /* first char in range */
1269 max = (U8)d[1]; /* last char in range */
1273 "Invalid [] range \"%c-%c\" in transliteration operator",
1274 (char)min, (char)max);
1278 if ((isLOWER(min) && isLOWER(max)) ||
1279 (isUPPER(min) && isUPPER(max))) {
1281 for (i = min; i <= max; i++)
1283 *d++ = NATIVE_TO_NEED(has_utf8,i);
1285 for (i = min; i <= max; i++)
1287 *d++ = NATIVE_TO_NEED(has_utf8,i);
1292 for (i = min; i <= max; i++)
1295 /* mark the range as done, and continue */
1301 /* range begins (ignore - as first or last char) */
1302 else if (*s == '-' && s+1 < send && s != start) {
1304 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
1307 *d++ = UTF_TO_NATIVE(0xff); /* use illegal utf8 byte--see pmtrans */
1319 /* if we get here, we're not doing a transliteration */
1321 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1322 except for the last char, which will be done separately. */
1323 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1325 while (s < send && *s != ')')
1326 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1328 else if (s[2] == '{' /* This should match regcomp.c */
1329 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1332 char *regparse = s + (s[2] == '{' ? 3 : 4);
1335 while (count && (c = *regparse)) {
1336 if (c == '\\' && regparse[1])
1344 if (*regparse != ')') {
1345 regparse--; /* Leave one char for continuation. */
1346 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1348 while (s < regparse)
1349 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1353 /* likewise skip #-initiated comments in //x patterns */
1354 else if (*s == '#' && PL_lex_inpat &&
1355 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1356 while (s+1 < send && *s != '\n')
1357 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1360 /* check for embedded arrays
1361 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1363 else if (*s == '@' && s[1]
1364 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
1367 /* check for embedded scalars. only stop if we're sure it's a
1370 else if (*s == '$') {
1371 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1373 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1374 break; /* in regexp, $ might be tail anchor */
1377 /* End of else if chain - OP_TRANS rejoin rest */
1380 if (*s == '\\' && s+1 < send) {
1383 /* some backslashes we leave behind */
1384 if (*leaveit && *s && strchr(leaveit, *s)) {
1385 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
1386 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1390 /* deprecate \1 in strings and substitution replacements */
1391 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1392 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1394 if (ckWARN(WARN_SYNTAX))
1395 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1400 /* string-change backslash escapes */
1401 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1406 /* if we get here, it's either a quoted -, or a digit */
1409 /* quoted - in transliterations */
1411 if (PL_lex_inwhat == OP_TRANS) {
1418 if (ckWARN(WARN_MISC) && isALNUM(*s))
1419 Perl_warner(aTHX_ WARN_MISC,
1420 "Unrecognized escape \\%c passed through",
1422 /* default action is to copy the quoted character */
1423 goto default_action;
1426 /* \132 indicates an octal constant */
1427 case '0': case '1': case '2': case '3':
1428 case '4': case '5': case '6': case '7':
1430 STRLEN len = 0; /* disallow underscores */
1431 uv = (UV)scan_oct(s, 3, &len);
1434 goto NUM_ESCAPE_INSERT;
1436 /* \x24 indicates a hex constant */
1440 char* e = strchr(s, '}');
1442 yyerror("Missing right brace on \\x{}");
1446 STRLEN len = 1; /* allow underscores */
1447 uv = (UV)scan_hex(s + 1, e - s - 1, &len);
1453 STRLEN len = 0; /* disallow underscores */
1454 uv = (UV)scan_hex(s, 2, &len);
1460 /* Insert oct or hex escaped character.
1461 * There will always enough room in sv since such
1462 * escapes will be longer than any UTF-8 sequence
1463 * they can end up as. */
1465 /* We need to map to chars to ASCII before doing the tests
1468 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(uv))) {
1469 if (!has_utf8 && uv > 255) {
1470 /* Might need to recode whatever we have
1471 * accumulated so far if it contains any
1474 * (Can't we keep track of that and avoid
1475 * this rescan? --jhi)
1479 for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) {
1480 if (!NATIVE_IS_INVARIANT(*c)) {
1485 STRLEN offset = d - SvPVX(sv);
1487 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
1491 while (src >= (U8 *)SvPVX(sv)) {
1492 if (!NATIVE_IS_INVARIANT(*src)) {
1493 U8 ch = NATIVE_TO_ASCII(*src);
1494 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1495 *dst-- = UTF8_EIGHT_BIT_HI(ch);
1505 if (has_utf8 || uv > 255) {
1506 d = (char*)uvchr_to_utf8((U8*)d, uv);
1508 if (PL_lex_inwhat == OP_TRANS &&
1509 PL_sublex_info.sub_op) {
1510 PL_sublex_info.sub_op->op_private |=
1511 (PL_lex_repl ? OPpTRANS_FROM_UTF
1524 /* \N{latin small letter a} is a named character */
1528 char* e = strchr(s, '}');
1534 yyerror("Missing right brace on \\N{}");
1538 res = newSVpvn(s + 1, e - s - 1);
1539 res = new_constant( Nullch, 0, "charnames",
1540 res, Nullsv, "\\N{...}" );
1542 sv_utf8_upgrade(res);
1543 str = SvPV(res,len);
1544 if (!has_utf8 && SvUTF8(res)) {
1545 char *ostart = SvPVX(sv);
1546 SvCUR_set(sv, d - ostart);
1549 sv_utf8_upgrade(sv);
1550 /* this just broke our allocation above... */
1551 SvGROW(sv, send - start);
1552 d = SvPVX(sv) + SvCUR(sv);
1555 if (len > e - s + 4) {
1556 char *odest = SvPVX(sv);
1558 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
1559 d = SvPVX(sv) + (d - odest);
1561 Copy(str, d, len, char);
1568 yyerror("Missing braces on \\N{}");
1571 /* \c is a control character */
1580 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
1584 /* printf-style backslashes, formfeeds, newlines, etc */
1586 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
1589 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
1592 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
1595 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
1598 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
1601 *d++ = ASCII_TO_NEED(has_utf8,'\033');
1604 *d++ = ASCII_TO_NEED(has_utf8,'\007');
1610 } /* end if (backslash) */
1613 /* If we started with encoded form, or already know we want it
1614 and then encode the next character */
1615 if ((has_utf8 || this_utf8) && !NATIVE_IS_INVARIANT((U8)(*s))) {
1617 UV uv = (this_utf8) ? utf8n_to_uvchr((U8*)s, send - s, &len, 0) : (UV) ((U8) *s);
1618 STRLEN need = UNISKIP(NATIVE_TO_UNI(uv));
1621 /* encoded value larger than old, need extra space (NOTE: SvCUR() not set here) */
1622 STRLEN off = d - SvPVX(sv);
1623 d = SvGROW(sv, SvLEN(sv) + (need-len)) + off;
1625 d = (char*)uvchr_to_utf8((U8*)d, uv);
1629 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1631 } /* while loop to process each character */
1633 /* terminate the string and set up the sv */
1635 SvCUR_set(sv, d - SvPVX(sv));
1636 if (SvCUR(sv) >= SvLEN(sv))
1637 Perl_croak(aTHX_ "panic:constant overflowed allocated space");
1642 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1643 PL_sublex_info.sub_op->op_private |=
1644 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1648 /* shrink the sv if we allocated more than we used */
1649 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1650 SvLEN_set(sv, SvCUR(sv) + 1);
1651 Renew(SvPVX(sv), SvLEN(sv), char);
1654 /* return the substring (via yylval) only if we parsed anything */
1655 if (s > PL_bufptr) {
1656 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1657 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1659 ( PL_lex_inwhat == OP_TRANS
1661 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1664 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1671 * Returns TRUE if there's more to the expression (e.g., a subscript),
1674 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1676 * ->[ and ->{ return TRUE
1677 * { and [ outside a pattern are always subscripts, so return TRUE
1678 * if we're outside a pattern and it's not { or [, then return FALSE
1679 * if we're in a pattern and the first char is a {
1680 * {4,5} (any digits around the comma) returns FALSE
1681 * if we're in a pattern and the first char is a [
1683 * [SOMETHING] has a funky algorithm to decide whether it's a
1684 * character class or not. It has to deal with things like
1685 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1686 * anything else returns TRUE
1689 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1692 S_intuit_more(pTHX_ register char *s)
1694 if (PL_lex_brackets)
1696 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1698 if (*s != '{' && *s != '[')
1703 /* In a pattern, so maybe we have {n,m}. */
1720 /* On the other hand, maybe we have a character class */
1723 if (*s == ']' || *s == '^')
1726 /* this is terrifying, and it works */
1727 int weight = 2; /* let's weigh the evidence */
1729 unsigned char un_char = 255, last_un_char;
1730 char *send = strchr(s,']');
1731 char tmpbuf[sizeof PL_tokenbuf * 4];
1733 if (!send) /* has to be an expression */
1736 Zero(seen,256,char);
1739 else if (isDIGIT(*s)) {
1741 if (isDIGIT(s[1]) && s[2] == ']')
1747 for (; s < send; s++) {
1748 last_un_char = un_char;
1749 un_char = (unsigned char)*s;
1754 weight -= seen[un_char] * 10;
1755 if (isALNUM_lazy_if(s+1,UTF)) {
1756 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1757 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1762 else if (*s == '$' && s[1] &&
1763 strchr("[#!%*<>()-=",s[1])) {
1764 if (/*{*/ strchr("])} =",s[2]))
1773 if (strchr("wds]",s[1]))
1775 else if (seen['\''] || seen['"'])
1777 else if (strchr("rnftbxcav",s[1]))
1779 else if (isDIGIT(s[1])) {
1781 while (s[1] && isDIGIT(s[1]))
1791 if (strchr("aA01! ",last_un_char))
1793 if (strchr("zZ79~",s[1]))
1795 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1796 weight -= 5; /* cope with negative subscript */
1799 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1800 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1805 if (keyword(tmpbuf, d - tmpbuf))
1808 if (un_char == last_un_char + 1)
1810 weight -= seen[un_char];
1815 if (weight >= 0) /* probably a character class */
1825 * Does all the checking to disambiguate
1827 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1828 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1830 * First argument is the stuff after the first token, e.g. "bar".
1832 * Not a method if bar is a filehandle.
1833 * Not a method if foo is a subroutine prototyped to take a filehandle.
1834 * Not a method if it's really "Foo $bar"
1835 * Method if it's "foo $bar"
1836 * Not a method if it's really "print foo $bar"
1837 * Method if it's really "foo package::" (interpreted as package->foo)
1838 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1839 * Not a method if bar is a filehandle or package, but is quoted with
1844 S_intuit_method(pTHX_ char *start, GV *gv)
1846 char *s = start + (*start == '$');
1847 char tmpbuf[sizeof PL_tokenbuf];
1855 if ((cv = GvCVu(gv))) {
1856 char *proto = SvPVX(cv);
1866 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1867 /* start is the beginning of the possible filehandle/object,
1868 * and s is the end of it
1869 * tmpbuf is a copy of it
1872 if (*start == '$') {
1873 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1878 return *s == '(' ? FUNCMETH : METHOD;
1880 if (!keyword(tmpbuf, len)) {
1881 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1886 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1887 if (indirgv && GvCVu(indirgv))
1889 /* filehandle or package name makes it a method */
1890 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1892 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1893 return 0; /* no assumptions -- "=>" quotes bearword */
1895 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1896 newSVpvn(tmpbuf,len));
1897 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1901 return *s == '(' ? FUNCMETH : METHOD;
1909 * Return a string of Perl code to load the debugger. If PERL5DB
1910 * is set, it will return the contents of that, otherwise a
1911 * compile-time require of perl5db.pl.
1918 char *pdb = PerlEnv_getenv("PERL5DB");
1922 SETERRNO(0,SS$_NORMAL);
1923 return "BEGIN { require 'perl5db.pl' }";
1929 /* Encoded script support. filter_add() effectively inserts a
1930 * 'pre-processing' function into the current source input stream.
1931 * Note that the filter function only applies to the current source file
1932 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1934 * The datasv parameter (which may be NULL) can be used to pass
1935 * private data to this instance of the filter. The filter function
1936 * can recover the SV using the FILTER_DATA macro and use it to
1937 * store private buffers and state information.
1939 * The supplied datasv parameter is upgraded to a PVIO type
1940 * and the IoDIRP/IoANY field is used to store the function pointer,
1941 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1942 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1943 * private use must be set using malloc'd pointers.
1947 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1952 if (!PL_rsfp_filters)
1953 PL_rsfp_filters = newAV();
1955 datasv = NEWSV(255,0);
1956 if (!SvUPGRADE(datasv, SVt_PVIO))
1957 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1958 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1959 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1960 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1961 funcp, SvPV_nolen(datasv)));
1962 av_unshift(PL_rsfp_filters, 1);
1963 av_store(PL_rsfp_filters, 0, datasv) ;
1968 /* Delete most recently added instance of this filter function. */
1970 Perl_filter_del(pTHX_ filter_t funcp)
1973 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1974 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1976 /* if filter is on top of stack (usual case) just pop it off */
1977 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1978 if (IoANY(datasv) == (void *)funcp) {
1979 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1980 IoANY(datasv) = (void *)NULL;
1981 sv_free(av_pop(PL_rsfp_filters));
1985 /* we need to search for the correct entry and clear it */
1986 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1990 /* Invoke the n'th filter function for the current rsfp. */
1992 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1995 /* 0 = read one text line */
2000 if (!PL_rsfp_filters)
2002 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
2003 /* Provide a default input filter to make life easy. */
2004 /* Note that we append to the line. This is handy. */
2005 DEBUG_P(PerlIO_printf(Perl_debug_log,
2006 "filter_read %d: from rsfp\n", idx));
2010 int old_len = SvCUR(buf_sv) ;
2012 /* ensure buf_sv is large enough */
2013 SvGROW(buf_sv, old_len + maxlen) ;
2014 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2015 if (PerlIO_error(PL_rsfp))
2016 return -1; /* error */
2018 return 0 ; /* end of file */
2020 SvCUR_set(buf_sv, old_len + len) ;
2023 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2024 if (PerlIO_error(PL_rsfp))
2025 return -1; /* error */
2027 return 0 ; /* end of file */
2030 return SvCUR(buf_sv);
2032 /* Skip this filter slot if filter has been deleted */
2033 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
2034 DEBUG_P(PerlIO_printf(Perl_debug_log,
2035 "filter_read %d: skipped (filter deleted)\n",
2037 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2039 /* Get function pointer hidden within datasv */
2040 funcp = (filter_t)IoANY(datasv);
2041 DEBUG_P(PerlIO_printf(Perl_debug_log,
2042 "filter_read %d: via function %p (%s)\n",
2043 idx, funcp, SvPV_nolen(datasv)));
2044 /* Call function. The function is expected to */
2045 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2046 /* Return: <0:error, =0:eof, >0:not eof */
2047 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
2051 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2053 #ifdef PERL_CR_FILTER
2054 if (!PL_rsfp_filters) {
2055 filter_add(S_cr_textfilter,NULL);
2058 if (PL_rsfp_filters) {
2061 SvCUR_set(sv, 0); /* start with empty line */
2062 if (FILTER_READ(0, sv, 0) > 0)
2063 return ( SvPVX(sv) ) ;
2068 return (sv_gets(sv, fp, append));
2072 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2076 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2080 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2081 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2083 return GvHV(gv); /* Foo:: */
2086 /* use constant CLASS => 'MyClass' */
2087 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2089 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2090 pkgname = SvPV_nolen(sv);
2094 return gv_stashpv(pkgname, FALSE);
2098 static char* exp_name[] =
2099 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2100 "ATTRTERM", "TERMBLOCK"
2107 Works out what to call the token just pulled out of the input
2108 stream. The yacc parser takes care of taking the ops we return and
2109 stitching them into a tree.
2115 if read an identifier
2116 if we're in a my declaration
2117 croak if they tried to say my($foo::bar)
2118 build the ops for a my() declaration
2119 if it's an access to a my() variable
2120 are we in a sort block?
2121 croak if my($a); $a <=> $b
2122 build ops for access to a my() variable
2123 if in a dq string, and they've said @foo and we can't find @foo
2125 build ops for a bareword
2126 if we already built the token before, use it.
2129 #ifdef USE_PURE_BISON
2131 Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
2136 yylval_pointer[yyactlevel] = lvalp;
2137 yychar_pointer[yyactlevel] = lcharp;
2138 if (yyactlevel >= YYMAXLEVEL)
2139 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
2141 r = Perl_yylex(aTHX);
2151 #pragma segment Perl_yylex
2164 /* check if there's an identifier for us to look at */
2165 if (PL_pending_ident) {
2166 /* pit holds the identifier we read and pending_ident is reset */
2167 char pit = PL_pending_ident;
2168 PL_pending_ident = 0;
2170 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2171 "### Tokener saw identifier '%s'\n", PL_tokenbuf); })
2173 /* if we're in a my(), we can't allow dynamics here.
2174 $foo'bar has already been turned into $foo::bar, so
2175 just check for colons.
2177 if it's a legal name, the OP is a PADANY.
2180 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2181 if (strchr(PL_tokenbuf,':'))
2182 yyerror(Perl_form(aTHX_ "No package name allowed for "
2183 "variable %s in \"our\"",
2185 tmp = pad_allocmy(PL_tokenbuf);
2188 if (strchr(PL_tokenbuf,':'))
2189 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2191 yylval.opval = newOP(OP_PADANY, 0);
2192 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2198 build the ops for accesses to a my() variable.
2200 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2201 then used in a comparison. This catches most, but not
2202 all cases. For instance, it catches
2203 sort { my($a); $a <=> $b }
2205 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2206 (although why you'd do that is anyone's guess).
2209 if (!strchr(PL_tokenbuf,':')) {
2211 /* Check for single character per-thread SVs */
2212 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2213 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2214 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2216 yylval.opval = newOP(OP_THREADSV, 0);
2217 yylval.opval->op_targ = tmp;
2220 #endif /* USE_THREADS */
2221 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2222 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2223 /* might be an "our" variable" */
2224 if (SvFLAGS(namesv) & SVpad_OUR) {
2225 /* build ops for a bareword */
2226 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2227 sv_catpvn(sym, "::", 2);
2228 sv_catpv(sym, PL_tokenbuf+1);
2229 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2230 yylval.opval->op_private = OPpCONST_ENTERED;
2231 gv_fetchpv(SvPVX(sym),
2233 ? (GV_ADDMULTI | GV_ADDINEVAL)
2236 ((PL_tokenbuf[0] == '$') ? SVt_PV
2237 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2242 /* if it's a sort block and they're naming $a or $b */
2243 if (PL_last_lop_op == OP_SORT &&
2244 PL_tokenbuf[0] == '$' &&
2245 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2248 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2249 d < PL_bufend && *d != '\n';
2252 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2253 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2259 yylval.opval = newOP(OP_PADANY, 0);
2260 yylval.opval->op_targ = tmp;
2266 Whine if they've said @foo in a doublequoted string,
2267 and @foo isn't a variable we can find in the symbol
2270 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2271 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2272 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2273 && ckWARN(WARN_AMBIGUOUS))
2275 /* Downgraded from fatal to warning 20000522 mjd */
2276 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2277 "Possible unintended interpolation of %s in string",
2282 /* build ops for a bareword */
2283 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2284 yylval.opval->op_private = OPpCONST_ENTERED;
2285 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2286 ((PL_tokenbuf[0] == '$') ? SVt_PV
2287 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2292 /* no identifier pending identification */
2294 switch (PL_lex_state) {
2296 case LEX_NORMAL: /* Some compilers will produce faster */
2297 case LEX_INTERPNORMAL: /* code if we comment these out. */
2301 /* when we've already built the next token, just pull it out of the queue */
2304 yylval = PL_nextval[PL_nexttoke];
2306 PL_lex_state = PL_lex_defer;
2307 PL_expect = PL_lex_expect;
2308 PL_lex_defer = LEX_NORMAL;
2310 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2311 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
2312 (IV)PL_nexttype[PL_nexttoke]); })
2314 return(PL_nexttype[PL_nexttoke]);
2316 /* interpolated case modifiers like \L \U, including \Q and \E.
2317 when we get here, PL_bufptr is at the \
2319 case LEX_INTERPCASEMOD:
2321 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2322 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2324 /* handle \E or end of string */
2325 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2329 if (PL_lex_casemods) {
2330 oldmod = PL_lex_casestack[--PL_lex_casemods];
2331 PL_lex_casestack[PL_lex_casemods] = '\0';
2333 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2335 PL_lex_state = LEX_INTERPCONCAT;
2339 if (PL_bufptr != PL_bufend)
2341 PL_lex_state = LEX_INTERPCONCAT;
2345 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2346 "### Saw case modifier at '%s'\n", PL_bufptr); })
2348 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2349 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2350 if (strchr("LU", *s) &&
2351 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2353 PL_lex_casestack[--PL_lex_casemods] = '\0';
2356 if (PL_lex_casemods > 10) {
2357 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2358 if (newlb != PL_lex_casestack) {
2360 PL_lex_casestack = newlb;
2363 PL_lex_casestack[PL_lex_casemods++] = *s;
2364 PL_lex_casestack[PL_lex_casemods] = '\0';
2365 PL_lex_state = LEX_INTERPCONCAT;
2366 PL_nextval[PL_nexttoke].ival = 0;
2369 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2371 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2373 PL_nextval[PL_nexttoke].ival = OP_LC;
2375 PL_nextval[PL_nexttoke].ival = OP_UC;
2377 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2379 Perl_croak(aTHX_ "panic: yylex");
2382 if (PL_lex_starts) {
2391 case LEX_INTERPPUSH:
2392 return sublex_push();
2394 case LEX_INTERPSTART:
2395 if (PL_bufptr == PL_bufend)
2396 return sublex_done();
2397 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2398 "### Interpolated variable at '%s'\n", PL_bufptr); })
2400 PL_lex_dojoin = (*PL_bufptr == '@');
2401 PL_lex_state = LEX_INTERPNORMAL;
2402 if (PL_lex_dojoin) {
2403 PL_nextval[PL_nexttoke].ival = 0;
2406 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2407 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2408 force_next(PRIVATEREF);
2410 force_ident("\"", '$');
2411 #endif /* USE_THREADS */
2412 PL_nextval[PL_nexttoke].ival = 0;
2414 PL_nextval[PL_nexttoke].ival = 0;
2416 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2419 if (PL_lex_starts++) {
2425 case LEX_INTERPENDMAYBE:
2426 if (intuit_more(PL_bufptr)) {
2427 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2433 if (PL_lex_dojoin) {
2434 PL_lex_dojoin = FALSE;
2435 PL_lex_state = LEX_INTERPCONCAT;
2438 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2439 && SvEVALED(PL_lex_repl))
2441 if (PL_bufptr != PL_bufend)
2442 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2443 PL_lex_repl = Nullsv;
2446 case LEX_INTERPCONCAT:
2448 if (PL_lex_brackets)
2449 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2451 if (PL_bufptr == PL_bufend)
2452 return sublex_done();
2454 if (SvIVX(PL_linestr) == '\'') {
2455 SV *sv = newSVsv(PL_linestr);
2458 else if ( PL_hints & HINT_NEW_RE )
2459 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2460 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2464 s = scan_const(PL_bufptr);
2466 PL_lex_state = LEX_INTERPCASEMOD;
2468 PL_lex_state = LEX_INTERPSTART;
2471 if (s != PL_bufptr) {
2472 PL_nextval[PL_nexttoke] = yylval;
2475 if (PL_lex_starts++)
2485 PL_lex_state = LEX_NORMAL;
2486 s = scan_formline(PL_bufptr);
2487 if (!PL_lex_formbrack)
2493 PL_oldoldbufptr = PL_oldbufptr;
2496 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2497 exp_name[PL_expect], s);
2503 if (isIDFIRST_lazy_if(s,UTF))
2505 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2508 goto fake_eof; /* emulate EOF on ^D or ^Z */
2513 if (PL_lex_brackets)
2514 yyerror("Missing right curly or square bracket");
2515 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2516 "### Tokener got EOF\n");
2520 if (s++ < PL_bufend)
2521 goto retry; /* ignore stray nulls */
2524 if (!PL_in_eval && !PL_preambled) {
2525 PL_preambled = TRUE;
2526 sv_setpv(PL_linestr,incl_perldb());
2527 if (SvCUR(PL_linestr))
2528 sv_catpv(PL_linestr,";");
2530 while(AvFILLp(PL_preambleav) >= 0) {
2531 SV *tmpsv = av_shift(PL_preambleav);
2532 sv_catsv(PL_linestr, tmpsv);
2533 sv_catpv(PL_linestr, ";");
2536 sv_free((SV*)PL_preambleav);
2537 PL_preambleav = NULL;
2539 if (PL_minus_n || PL_minus_p) {
2540 sv_catpv(PL_linestr, "LINE: while (<>) {");
2542 sv_catpv(PL_linestr,"chomp;");
2544 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2546 GvIMPORTED_AV_on(gv);
2548 if (strchr("/'\"", *PL_splitstr)
2549 && strchr(PL_splitstr + 1, *PL_splitstr))
2550 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2553 s = "'~#\200\1'"; /* surely one char is unused...*/
2554 while (s[1] && strchr(PL_splitstr, *s)) s++;
2556 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2557 "q" + (delim == '\''), delim);
2558 for (s = PL_splitstr; *s; s++) {
2560 sv_catpvn(PL_linestr, "\\", 1);
2561 sv_catpvn(PL_linestr, s, 1);
2563 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2567 sv_catpv(PL_linestr,"@F=split(' ');");
2570 sv_catpv(PL_linestr, "\n");
2571 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2572 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2573 PL_last_lop = PL_last_uni = Nullch;
2574 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2575 SV *sv = NEWSV(85,0);
2577 sv_upgrade(sv, SVt_PVMG);
2578 sv_setsv(sv,PL_linestr);
2579 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2584 bof = PL_rsfp ? TRUE : FALSE;
2585 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2588 if (PL_preprocess && !PL_in_eval)
2589 (void)PerlProc_pclose(PL_rsfp);
2590 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2591 PerlIO_clearerr(PL_rsfp);
2593 (void)PerlIO_close(PL_rsfp);
2595 PL_doextract = FALSE;
2597 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2598 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2599 sv_catpv(PL_linestr,";}");
2600 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2601 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2602 PL_last_lop = PL_last_uni = Nullch;
2603 PL_minus_n = PL_minus_p = 0;
2606 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2607 PL_last_lop = PL_last_uni = Nullch;
2608 sv_setpv(PL_linestr,"");
2609 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2611 /* if it looks like the start of a BOM, check if it in fact is */
2612 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
2613 #ifdef PERLIO_IS_STDIO
2614 # ifdef __GNU_LIBRARY__
2615 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
2616 # define FTELL_FOR_PIPE_IS_BROKEN
2620 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2621 # define FTELL_FOR_PIPE_IS_BROKEN
2626 #ifdef FTELL_FOR_PIPE_IS_BROKEN
2627 /* This loses the possibility to detect the bof
2628 * situation on perl -P when the libc5 is being used.
2629 * Workaround? Maybe attach some extra state to PL_rsfp?
2632 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2634 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2637 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2638 s = swallow_bom((U8*)s);
2642 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2643 PL_doextract = FALSE;
2645 /* Incest with pod. */
2646 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2647 sv_setpv(PL_linestr, "");
2648 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2649 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2650 PL_last_lop = PL_last_uni = Nullch;
2651 PL_doextract = FALSE;
2655 } while (PL_doextract);
2656 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2657 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2658 SV *sv = NEWSV(85,0);
2660 sv_upgrade(sv, SVt_PVMG);
2661 sv_setsv(sv,PL_linestr);
2662 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2664 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2665 PL_last_lop = PL_last_uni = Nullch;
2666 if (CopLINE(PL_curcop) == 1) {
2667 while (s < PL_bufend && isSPACE(*s))
2669 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2673 if (*s == '#' && *(s+1) == '!')
2675 #ifdef ALTERNATE_SHEBANG
2677 static char as[] = ALTERNATE_SHEBANG;
2678 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2679 d = s + (sizeof(as) - 1);
2681 #endif /* ALTERNATE_SHEBANG */
2690 while (*d && !isSPACE(*d))
2694 #ifdef ARG_ZERO_IS_SCRIPT
2695 if (ipathend > ipath) {
2697 * HP-UX (at least) sets argv[0] to the script name,
2698 * which makes $^X incorrect. And Digital UNIX and Linux,
2699 * at least, set argv[0] to the basename of the Perl
2700 * interpreter. So, having found "#!", we'll set it right.
2702 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2703 assert(SvPOK(x) || SvGMAGICAL(x));
2704 if (sv_eq(x, CopFILESV(PL_curcop))) {
2705 sv_setpvn(x, ipath, ipathend - ipath);
2708 TAINT_NOT; /* $^X is always tainted, but that's OK */
2710 #endif /* ARG_ZERO_IS_SCRIPT */
2715 d = instr(s,"perl -");
2717 d = instr(s,"perl");
2719 /* avoid getting into infinite loops when shebang
2720 * line contains "Perl" rather than "perl" */
2722 for (d = ipathend-4; d >= ipath; --d) {
2723 if ((*d == 'p' || *d == 'P')
2724 && !ibcmp(d, "perl", 4))
2734 #ifdef ALTERNATE_SHEBANG
2736 * If the ALTERNATE_SHEBANG on this system starts with a
2737 * character that can be part of a Perl expression, then if
2738 * we see it but not "perl", we're probably looking at the
2739 * start of Perl code, not a request to hand off to some
2740 * other interpreter. Similarly, if "perl" is there, but
2741 * not in the first 'word' of the line, we assume the line
2742 * contains the start of the Perl program.
2744 if (d && *s != '#') {
2746 while (*c && !strchr("; \t\r\n\f\v#", *c))
2749 d = Nullch; /* "perl" not in first word; ignore */
2751 *s = '#'; /* Don't try to parse shebang line */
2753 #endif /* ALTERNATE_SHEBANG */
2754 #ifndef MACOS_TRADITIONAL
2759 !instr(s,"indir") &&
2760 instr(PL_origargv[0],"perl"))
2766 while (s < PL_bufend && isSPACE(*s))
2768 if (s < PL_bufend) {
2769 Newz(899,newargv,PL_origargc+3,char*);
2771 while (s < PL_bufend && !isSPACE(*s))
2774 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2777 newargv = PL_origargv;
2779 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
2780 Perl_croak(aTHX_ "Can't exec %s", ipath);
2784 U32 oldpdb = PL_perldb;
2785 bool oldn = PL_minus_n;
2786 bool oldp = PL_minus_p;
2788 while (*d && !isSPACE(*d)) d++;
2789 while (SPACE_OR_TAB(*d)) d++;
2793 if (*d == 'M' || *d == 'm') {
2795 while (*d && !isSPACE(*d)) d++;
2796 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2799 d = moreswitches(d);
2801 if ((PERLDB_LINE && !oldpdb) ||
2802 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2803 /* if we have already added "LINE: while (<>) {",
2804 we must not do it again */
2806 sv_setpv(PL_linestr, "");
2807 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2808 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2809 PL_last_lop = PL_last_uni = Nullch;
2810 PL_preambled = FALSE;
2812 (void)gv_fetchfile(PL_origfilename);
2819 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2821 PL_lex_state = LEX_FORMLINE;
2826 #ifdef PERL_STRICT_CR
2827 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2829 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2831 case ' ': case '\t': case '\f': case 013:
2832 #ifdef MACOS_TRADITIONAL
2839 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2840 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2841 /* handle eval qq[#line 1 "foo"\n ...] */
2842 CopLINE_dec(PL_curcop);
2846 while (s < d && *s != '\n')
2851 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2853 PL_lex_state = LEX_FORMLINE;
2863 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2870 while (s < PL_bufend && SPACE_OR_TAB(*s))
2873 if (strnEQ(s,"=>",2)) {
2874 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2875 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2876 "### Saw unary minus before =>, forcing word '%s'\n", s);
2878 OPERATOR('-'); /* unary minus */
2880 PL_last_uni = PL_oldbufptr;
2882 case 'r': ftst = OP_FTEREAD; break;
2883 case 'w': ftst = OP_FTEWRITE; break;
2884 case 'x': ftst = OP_FTEEXEC; break;
2885 case 'o': ftst = OP_FTEOWNED; break;
2886 case 'R': ftst = OP_FTRREAD; break;
2887 case 'W': ftst = OP_FTRWRITE; break;
2888 case 'X': ftst = OP_FTREXEC; break;
2889 case 'O': ftst = OP_FTROWNED; break;
2890 case 'e': ftst = OP_FTIS; break;
2891 case 'z': ftst = OP_FTZERO; break;
2892 case 's': ftst = OP_FTSIZE; break;
2893 case 'f': ftst = OP_FTFILE; break;
2894 case 'd': ftst = OP_FTDIR; break;
2895 case 'l': ftst = OP_FTLINK; break;
2896 case 'p': ftst = OP_FTPIPE; break;
2897 case 'S': ftst = OP_FTSOCK; break;
2898 case 'u': ftst = OP_FTSUID; break;
2899 case 'g': ftst = OP_FTSGID; break;
2900 case 'k': ftst = OP_FTSVTX; break;
2901 case 'b': ftst = OP_FTBLK; break;
2902 case 'c': ftst = OP_FTCHR; break;
2903 case 't': ftst = OP_FTTTY; break;
2904 case 'T': ftst = OP_FTTEXT; break;
2905 case 'B': ftst = OP_FTBINARY; break;
2906 case 'M': case 'A': case 'C':
2907 gv_fetchpv("\024",TRUE, SVt_PV);
2909 case 'M': ftst = OP_FTMTIME; break;
2910 case 'A': ftst = OP_FTATIME; break;
2911 case 'C': ftst = OP_FTCTIME; break;
2919 PL_last_lop_op = ftst;
2920 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2921 "### Saw file test %c\n", (int)ftst);
2926 /* Assume it was a minus followed by a one-letter named
2927 * subroutine call (or a -bareword), then. */
2928 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2929 "### %c looked like a file test but was not\n",
2938 if (PL_expect == XOPERATOR)
2943 else if (*s == '>') {
2946 if (isIDFIRST_lazy_if(s,UTF)) {
2947 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2955 if (PL_expect == XOPERATOR)
2958 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2960 OPERATOR('-'); /* unary minus */
2967 if (PL_expect == XOPERATOR)
2972 if (PL_expect == XOPERATOR)
2975 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2981 if (PL_expect != XOPERATOR) {
2982 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2983 PL_expect = XOPERATOR;
2984 force_ident(PL_tokenbuf, '*');
2997 if (PL_expect == XOPERATOR) {
3001 PL_tokenbuf[0] = '%';
3002 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
3003 if (!PL_tokenbuf[1]) {
3005 yyerror("Final % should be \\% or %name");
3008 PL_pending_ident = '%';
3027 switch (PL_expect) {
3030 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
3032 PL_bufptr = s; /* update in case we back off */
3038 PL_expect = XTERMBLOCK;
3042 while (isIDFIRST_lazy_if(s,UTF)) {
3043 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3044 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
3045 if (tmp < 0) tmp = -tmp;
3060 d = scan_str(d,TRUE,TRUE);
3062 /* MUST advance bufptr here to avoid bogus
3063 "at end of line" context messages from yyerror().
3065 PL_bufptr = s + len;
3066 yyerror("Unterminated attribute parameter in attribute list");
3069 return 0; /* EOF indicator */
3073 SV *sv = newSVpvn(s, len);
3074 sv_catsv(sv, PL_lex_stuff);
3075 attrs = append_elem(OP_LIST, attrs,
3076 newSVOP(OP_CONST, 0, sv));
3077 SvREFCNT_dec(PL_lex_stuff);
3078 PL_lex_stuff = Nullsv;
3081 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
3082 CvLVALUE_on(PL_compcv);
3083 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
3084 CvLOCKED_on(PL_compcv);
3085 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
3086 CvMETHOD_on(PL_compcv);
3088 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "shared", len))
3089 GvSHARED_on(cGVOPx_gv(yylval.opval));
3091 /* After we've set the flags, it could be argued that
3092 we don't need to do the attributes.pm-based setting
3093 process, and shouldn't bother appending recognized
3094 flags. To experiment with that, uncomment the
3095 following "else": */
3097 attrs = append_elem(OP_LIST, attrs,
3098 newSVOP(OP_CONST, 0,
3102 if (*s == ':' && s[1] != ':')
3105 break; /* require real whitespace or :'s */
3107 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
3108 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
3109 char q = ((*s == '\'') ? '"' : '\'');
3110 /* If here for an expression, and parsed no attrs, back off. */
3111 if (tmp == '=' && !attrs) {
3115 /* MUST advance bufptr here to avoid bogus "at end of line"
3116 context messages from yyerror().
3120 yyerror("Unterminated attribute list");
3122 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3130 PL_nextval[PL_nexttoke].opval = attrs;
3138 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3139 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
3155 if (PL_lex_brackets <= 0)
3156 yyerror("Unmatched right square bracket");
3159 if (PL_lex_state == LEX_INTERPNORMAL) {
3160 if (PL_lex_brackets == 0) {
3161 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3162 PL_lex_state = LEX_INTERPEND;
3169 if (PL_lex_brackets > 100) {
3170 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3171 if (newlb != PL_lex_brackstack) {
3173 PL_lex_brackstack = newlb;
3176 switch (PL_expect) {
3178 if (PL_lex_formbrack) {
3182 if (PL_oldoldbufptr == PL_last_lop)
3183 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3185 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3186 OPERATOR(HASHBRACK);
3188 while (s < PL_bufend && SPACE_OR_TAB(*s))
3191 PL_tokenbuf[0] = '\0';
3192 if (d < PL_bufend && *d == '-') {
3193 PL_tokenbuf[0] = '-';
3195 while (d < PL_bufend && SPACE_OR_TAB(*d))
3198 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3199 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3201 while (d < PL_bufend && SPACE_OR_TAB(*d))
3204 char minus = (PL_tokenbuf[0] == '-');
3205 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3213 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3218 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3223 if (PL_oldoldbufptr == PL_last_lop)
3224 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3226 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3229 OPERATOR(HASHBRACK);
3230 /* This hack serves to disambiguate a pair of curlies
3231 * as being a block or an anon hash. Normally, expectation
3232 * determines that, but in cases where we're not in a
3233 * position to expect anything in particular (like inside
3234 * eval"") we have to resolve the ambiguity. This code
3235 * covers the case where the first term in the curlies is a
3236 * quoted string. Most other cases need to be explicitly
3237 * disambiguated by prepending a `+' before the opening
3238 * curly in order to force resolution as an anon hash.
3240 * XXX should probably propagate the outer expectation
3241 * into eval"" to rely less on this hack, but that could
3242 * potentially break current behavior of eval"".
3246 if (*s == '\'' || *s == '"' || *s == '`') {
3247 /* common case: get past first string, handling escapes */
3248 for (t++; t < PL_bufend && *t != *s;)
3249 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3253 else if (*s == 'q') {
3256 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3260 char open, close, term;
3263 while (t < PL_bufend && isSPACE(*t))
3267 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3271 for (t++; t < PL_bufend; t++) {
3272 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3274 else if (*t == open)
3278 for (t++; t < PL_bufend; t++) {
3279 if (*t == '\\' && t+1 < PL_bufend)
3281 else if (*t == close && --brackets <= 0)
3283 else if (*t == open)
3289 else if (isALNUM_lazy_if(t,UTF)) {
3291 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3294 while (t < PL_bufend && isSPACE(*t))
3296 /* if comma follows first term, call it an anon hash */
3297 /* XXX it could be a comma expression with loop modifiers */
3298 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3299 || (*t == '=' && t[1] == '>')))
3300 OPERATOR(HASHBRACK);
3301 if (PL_expect == XREF)
3304 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3310 yylval.ival = CopLINE(PL_curcop);
3311 if (isSPACE(*s) || *s == '#')
3312 PL_copline = NOLINE; /* invalidate current command line number */
3317 if (PL_lex_brackets <= 0)
3318 yyerror("Unmatched right curly bracket");
3320 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3321 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3322 PL_lex_formbrack = 0;
3323 if (PL_lex_state == LEX_INTERPNORMAL) {
3324 if (PL_lex_brackets == 0) {
3325 if (PL_expect & XFAKEBRACK) {
3326 PL_expect &= XENUMMASK;
3327 PL_lex_state = LEX_INTERPEND;
3329 return yylex(); /* ignore fake brackets */
3331 if (*s == '-' && s[1] == '>')
3332 PL_lex_state = LEX_INTERPENDMAYBE;
3333 else if (*s != '[' && *s != '{')
3334 PL_lex_state = LEX_INTERPEND;
3337 if (PL_expect & XFAKEBRACK) {
3338 PL_expect &= XENUMMASK;
3340 return yylex(); /* ignore fake brackets */
3350 if (PL_expect == XOPERATOR) {
3351 if (ckWARN(WARN_SEMICOLON)
3352 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3354 CopLINE_dec(PL_curcop);
3355 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3356 CopLINE_inc(PL_curcop);
3361 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3363 PL_expect = XOPERATOR;
3364 force_ident(PL_tokenbuf, '&');
3368 yylval.ival = (OPpENTERSUB_AMPER<<8);
3387 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3388 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3390 if (PL_expect == XSTATE && isALPHA(tmp) &&
3391 (s == PL_linestart+1 || s[-2] == '\n') )
3393 if (PL_in_eval && !PL_rsfp) {
3398 if (strnEQ(s,"=cut",4)) {
3412 PL_doextract = TRUE;
3415 if (PL_lex_brackets < PL_lex_formbrack) {
3417 #ifdef PERL_STRICT_CR
3418 for (t = s; SPACE_OR_TAB(*t); t++) ;
3420 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3422 if (*t == '\n' || *t == '#') {
3440 if (PL_expect != XOPERATOR) {
3441 if (s[1] != '<' && !strchr(s,'>'))
3444 s = scan_heredoc(s);
3446 s = scan_inputsymbol(s);
3447 TERM(sublex_start());
3452 SHop(OP_LEFT_SHIFT);
3466 SHop(OP_RIGHT_SHIFT);
3475 if (PL_expect == XOPERATOR) {
3476 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3479 return ','; /* grandfather non-comma-format format */
3483 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3484 PL_tokenbuf[0] = '@';
3485 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3486 sizeof PL_tokenbuf - 1, FALSE);
3487 if (PL_expect == XOPERATOR)
3488 no_op("Array length", s);
3489 if (!PL_tokenbuf[1])
3491 PL_expect = XOPERATOR;
3492 PL_pending_ident = '#';
3496 PL_tokenbuf[0] = '$';
3497 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3498 sizeof PL_tokenbuf - 1, FALSE);
3499 if (PL_expect == XOPERATOR)
3501 if (!PL_tokenbuf[1]) {
3503 yyerror("Final $ should be \\$ or $name");
3507 /* This kludge not intended to be bulletproof. */
3508 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3509 yylval.opval = newSVOP(OP_CONST, 0,
3510 newSViv(PL_compiling.cop_arybase));
3511 yylval.opval->op_private = OPpCONST_ARYBASE;
3517 if (PL_lex_state == LEX_NORMAL)
3520 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3523 PL_tokenbuf[0] = '@';
3524 if (ckWARN(WARN_SYNTAX)) {
3526 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3529 PL_bufptr = skipspace(PL_bufptr);
3530 while (t < PL_bufend && *t != ']')
3532 Perl_warner(aTHX_ WARN_SYNTAX,
3533 "Multidimensional syntax %.*s not supported",
3534 (t - PL_bufptr) + 1, PL_bufptr);
3538 else if (*s == '{') {
3539 PL_tokenbuf[0] = '%';
3540 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3541 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3543 char tmpbuf[sizeof PL_tokenbuf];
3545 for (t++; isSPACE(*t); t++) ;
3546 if (isIDFIRST_lazy_if(t,UTF)) {
3547 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3548 for (; isSPACE(*t); t++) ;
3549 if (*t == ';' && get_cv(tmpbuf, FALSE))
3550 Perl_warner(aTHX_ WARN_SYNTAX,
3551 "You need to quote \"%s\"", tmpbuf);
3557 PL_expect = XOPERATOR;
3558 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3559 bool islop = (PL_last_lop == PL_oldoldbufptr);
3560 if (!islop || PL_last_lop_op == OP_GREPSTART)
3561 PL_expect = XOPERATOR;
3562 else if (strchr("$@\"'`q", *s))
3563 PL_expect = XTERM; /* e.g. print $fh "foo" */
3564 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3565 PL_expect = XTERM; /* e.g. print $fh &sub */
3566 else if (isIDFIRST_lazy_if(s,UTF)) {
3567 char tmpbuf[sizeof PL_tokenbuf];
3568 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3569 if ((tmp = keyword(tmpbuf, len))) {
3570 /* binary operators exclude handle interpretations */
3582 PL_expect = XTERM; /* e.g. print $fh length() */
3587 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3588 if (gv && GvCVu(gv))
3589 PL_expect = XTERM; /* e.g. print $fh subr() */
3592 else if (isDIGIT(*s))
3593 PL_expect = XTERM; /* e.g. print $fh 3 */
3594 else if (*s == '.' && isDIGIT(s[1]))
3595 PL_expect = XTERM; /* e.g. print $fh .3 */
3596 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3597 PL_expect = XTERM; /* e.g. print $fh -1 */
3598 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3599 PL_expect = XTERM; /* print $fh <<"EOF" */
3601 PL_pending_ident = '$';
3605 if (PL_expect == XOPERATOR)
3607 PL_tokenbuf[0] = '@';
3608 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3609 if (!PL_tokenbuf[1]) {
3611 yyerror("Final @ should be \\@ or @name");
3614 if (PL_lex_state == LEX_NORMAL)
3616 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3618 PL_tokenbuf[0] = '%';
3620 /* Warn about @ where they meant $. */
3621 if (ckWARN(WARN_SYNTAX)) {
3622 if (*s == '[' || *s == '{') {
3624 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3626 if (*t == '}' || *t == ']') {
3628 PL_bufptr = skipspace(PL_bufptr);
3629 Perl_warner(aTHX_ WARN_SYNTAX,
3630 "Scalar value %.*s better written as $%.*s",
3631 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3636 PL_pending_ident = '@';
3639 case '/': /* may either be division or pattern */
3640 case '?': /* may either be conditional or pattern */
3641 if (PL_expect != XOPERATOR) {
3642 /* Disable warning on "study /blah/" */
3643 if (PL_oldoldbufptr == PL_last_uni
3644 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3645 || memNE(PL_last_uni, "study", 5)
3646 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3648 s = scan_pat(s,OP_MATCH);
3649 TERM(sublex_start());
3657 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3658 #ifdef PERL_STRICT_CR
3661 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3663 && (s == PL_linestart || s[-1] == '\n') )
3665 PL_lex_formbrack = 0;
3669 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3675 yylval.ival = OPf_SPECIAL;
3681 if (PL_expect != XOPERATOR)
3686 case '0': case '1': case '2': case '3': case '4':
3687 case '5': case '6': case '7': case '8': case '9':
3688 s = scan_num(s, &yylval);
3689 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3690 "### Saw number in '%s'\n", s);
3692 if (PL_expect == XOPERATOR)
3697 s = scan_str(s,FALSE,FALSE);
3698 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3699 "### Saw string before '%s'\n", s);
3701 if (PL_expect == XOPERATOR) {
3702 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3705 return ','; /* grandfather non-comma-format format */
3711 missingterm((char*)0);
3712 yylval.ival = OP_CONST;
3713 TERM(sublex_start());
3716 s = scan_str(s,FALSE,FALSE);
3717 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3718 "### Saw string before '%s'\n", s);
3720 if (PL_expect == XOPERATOR) {
3721 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3724 return ','; /* grandfather non-comma-format format */
3730 missingterm((char*)0);
3731 yylval.ival = OP_CONST;
3732 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3733 if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) {
3734 yylval.ival = OP_STRINGIFY;
3738 TERM(sublex_start());
3741 s = scan_str(s,FALSE,FALSE);
3742 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3743 "### Saw backtick string before '%s'\n", s);
3745 if (PL_expect == XOPERATOR)
3746 no_op("Backticks",s);
3748 missingterm((char*)0);
3749 yylval.ival = OP_BACKTICK;
3751 TERM(sublex_start());
3755 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3756 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3758 if (PL_expect == XOPERATOR)
3759 no_op("Backslash",s);
3763 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3767 while (isDIGIT(*start) || *start == '_')
3769 if (*start == '.' && isDIGIT(start[1])) {
3770 s = scan_num(s, &yylval);
3773 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3774 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3778 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3781 s = scan_num(s, &yylval);
3788 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3827 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3829 /* Some keywords can be followed by any delimiter, including ':' */
3830 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3831 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3832 (PL_tokenbuf[0] == 'q' &&
3833 strchr("qwxr", PL_tokenbuf[1])))));
3835 /* x::* is just a word, unless x is "CORE" */
3836 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3840 while (d < PL_bufend && isSPACE(*d))
3841 d++; /* no comments skipped here, or s### is misparsed */
3843 /* Is this a label? */
3844 if (!tmp && PL_expect == XSTATE
3845 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3847 yylval.pval = savepv(PL_tokenbuf);
3852 /* Check for keywords */
3853 tmp = keyword(PL_tokenbuf, len);
3855 /* Is this a word before a => operator? */
3856 if (*d == '=' && d[1] == '>') {
3858 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3859 yylval.opval->op_private = OPpCONST_BARE;
3860 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
3861 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3865 if (tmp < 0) { /* second-class keyword? */
3866 GV *ogv = Nullgv; /* override (winner) */
3867 GV *hgv = Nullgv; /* hidden (loser) */
3868 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3870 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3873 if (GvIMPORTED_CV(gv))
3875 else if (! CvMETHOD(cv))
3879 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3880 (gv = *gvp) != (GV*)&PL_sv_undef &&
3881 GvCVu(gv) && GvIMPORTED_CV(gv))
3887 tmp = 0; /* overridden by import or by GLOBAL */
3890 && -tmp==KEY_lock /* XXX generalizable kludge */
3892 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3894 tmp = 0; /* any sub overrides "weak" keyword */
3896 else { /* no override */
3900 if (ckWARN(WARN_AMBIGUOUS) && hgv
3901 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3902 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3903 "Ambiguous call resolved as CORE::%s(), %s",
3904 GvENAME(hgv), "qualify as such or use &");
3911 default: /* not a keyword */
3914 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3916 /* Get the rest if it looks like a package qualifier */
3918 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3920 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3923 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3924 *s == '\'' ? "'" : "::");
3928 if (PL_expect == XOPERATOR) {
3929 if (PL_bufptr == PL_linestart) {
3930 CopLINE_dec(PL_curcop);
3931 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3932 CopLINE_inc(PL_curcop);
3935 no_op("Bareword",s);
3938 /* Look for a subroutine with this name in current package,
3939 unless name is "Foo::", in which case Foo is a bearword
3940 (and a package name). */
3943 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3945 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3946 Perl_warner(aTHX_ WARN_BAREWORD,
3947 "Bareword \"%s\" refers to nonexistent package",
3950 PL_tokenbuf[len] = '\0';
3957 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3960 /* if we saw a global override before, get the right name */
3963 sv = newSVpvn("CORE::GLOBAL::",14);
3964 sv_catpv(sv,PL_tokenbuf);
3967 sv = newSVpv(PL_tokenbuf,0);
3969 /* Presume this is going to be a bareword of some sort. */
3972 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3973 yylval.opval->op_private = OPpCONST_BARE;
3975 /* And if "Foo::", then that's what it certainly is. */
3980 /* See if it's the indirect object for a list operator. */
3982 if (PL_oldoldbufptr &&
3983 PL_oldoldbufptr < PL_bufptr &&
3984 (PL_oldoldbufptr == PL_last_lop
3985 || PL_oldoldbufptr == PL_last_uni) &&
3986 /* NO SKIPSPACE BEFORE HERE! */
3987 (PL_expect == XREF ||
3988 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3990 bool immediate_paren = *s == '(';
3992 /* (Now we can afford to cross potential line boundary.) */
3995 /* Two barewords in a row may indicate method call. */
3997 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
4000 /* If not a declared subroutine, it's an indirect object. */
4001 /* (But it's an indir obj regardless for sort.) */
4003 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
4004 ((!gv || !GvCVu(gv)) &&
4005 (PL_last_lop_op != OP_MAPSTART &&
4006 PL_last_lop_op != OP_GREPSTART))))
4008 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
4014 PL_expect = XOPERATOR;
4017 /* Is this a word before a => operator? */
4018 if (*s == '=' && s[1] == '>') {
4020 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
4021 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
4022 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
4026 /* If followed by a paren, it's certainly a subroutine. */
4029 if (gv && GvCVu(gv)) {
4030 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
4031 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
4036 PL_nextval[PL_nexttoke].opval = yylval.opval;
4037 PL_expect = XOPERATOR;
4043 /* If followed by var or block, call it a method (unless sub) */
4045 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
4046 PL_last_lop = PL_oldbufptr;
4047 PL_last_lop_op = OP_METHOD;
4051 /* If followed by a bareword, see if it looks like indir obj. */
4053 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
4056 /* Not a method, so call it a subroutine (if defined) */
4058 if (gv && GvCVu(gv)) {
4060 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
4061 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4062 "Ambiguous use of -%s resolved as -&%s()",
4063 PL_tokenbuf, PL_tokenbuf);
4064 /* Check for a constant sub */
4066 if ((sv = cv_const_sv(cv))) {
4068 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
4069 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
4070 yylval.opval->op_private = 0;
4074 /* Resolve to GV now. */
4075 op_free(yylval.opval);
4076 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
4077 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
4078 PL_last_lop = PL_oldbufptr;
4079 PL_last_lop_op = OP_ENTERSUB;
4080 /* Is there a prototype? */
4083 char *proto = SvPV((SV*)cv, len);
4086 if (strEQ(proto, "$"))
4088 if (*proto == '&' && *s == '{') {
4089 sv_setpv(PL_subname,"__ANON__");
4093 PL_nextval[PL_nexttoke].opval = yylval.opval;
4099 /* Call it a bare word */
4101 if (PL_hints & HINT_STRICT_SUBS)
4102 yylval.opval->op_private |= OPpCONST_STRICT;
4105 if (ckWARN(WARN_RESERVED)) {
4106 if (lastchar != '-') {
4107 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
4109 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
4116 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
4117 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4118 "Operator or semicolon missing before %c%s",
4119 lastchar, PL_tokenbuf);
4120 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4121 "Ambiguous use of %c resolved as operator %c",
4122 lastchar, lastchar);
4128 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4129 newSVpv(CopFILE(PL_curcop),0));
4133 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4134 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
4137 case KEY___PACKAGE__:
4138 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4140 ? newSVsv(PL_curstname)
4149 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
4150 char *pname = "main";
4151 if (PL_tokenbuf[2] == 'D')
4152 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
4153 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
4156 GvIOp(gv) = newIO();
4157 IoIFP(GvIOp(gv)) = PL_rsfp;
4158 #if defined(HAS_FCNTL) && defined(F_SETFD)
4160 int fd = PerlIO_fileno(PL_rsfp);
4161 fcntl(fd,F_SETFD,fd >= 3);
4164 /* Mark this internal pseudo-handle as clean */
4165 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
4167 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
4168 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
4169 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
4171 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
4172 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4173 /* if the script was opened in binmode, we need to revert
4174 * it to text mode for compatibility; but only iff it has CRs
4175 * XXX this is a questionable hack at best. */
4176 if (PL_bufend-PL_bufptr > 2
4177 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4180 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4181 loc = PerlIO_tell(PL_rsfp);
4182 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4184 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4185 #ifdef PERLIO_IS_STDIO /* really? */
4186 # if defined(__BORLANDC__)
4187 /* XXX see note in do_binmode() */
4188 ((FILE*)PL_rsfp)->flags &= ~_F_BIN;
4192 PerlIO_seek(PL_rsfp, loc, 0);
4196 #ifdef PERLIO_LAYERS
4197 if (UTF && !IN_BYTE)
4198 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4211 if (PL_expect == XSTATE) {
4218 if (*s == ':' && s[1] == ':') {
4221 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4222 if (!(tmp = keyword(PL_tokenbuf, len)))
4223 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4237 LOP(OP_ACCEPT,XTERM);
4243 LOP(OP_ATAN2,XTERM);
4249 LOP(OP_BINMODE,XTERM);
4252 LOP(OP_BLESS,XTERM);
4261 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4278 if (!PL_cryptseen) {
4279 PL_cryptseen = TRUE;
4283 LOP(OP_CRYPT,XTERM);
4286 if (ckWARN(WARN_CHMOD)) {
4287 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4288 if (*d != '0' && isDIGIT(*d))
4289 Perl_warner(aTHX_ WARN_CHMOD,
4290 "chmod() mode argument is missing initial 0");
4292 LOP(OP_CHMOD,XTERM);
4295 LOP(OP_CHOWN,XTERM);
4298 LOP(OP_CONNECT,XTERM);
4314 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4318 PL_hints |= HINT_BLOCK_SCOPE;
4328 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4329 LOP(OP_DBMOPEN,XTERM);
4335 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4342 yylval.ival = CopLINE(PL_curcop);
4356 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4357 UNIBRACK(OP_ENTEREVAL);
4372 case KEY_endhostent:
4378 case KEY_endservent:
4381 case KEY_endprotoent:
4392 yylval.ival = CopLINE(PL_curcop);
4394 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4396 if ((PL_bufend - p) >= 3 &&
4397 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4399 else if ((PL_bufend - p) >= 4 &&
4400 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4403 if (isIDFIRST_lazy_if(p,UTF)) {
4404 p = scan_ident(p, PL_bufend,
4405 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4409 Perl_croak(aTHX_ "Missing $ on loop variable");
4414 LOP(OP_FORMLINE,XTERM);
4420 LOP(OP_FCNTL,XTERM);
4426 LOP(OP_FLOCK,XTERM);
4435 LOP(OP_GREPSTART, XREF);
4438 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4453 case KEY_getpriority:
4454 LOP(OP_GETPRIORITY,XTERM);
4456 case KEY_getprotobyname:
4459 case KEY_getprotobynumber:
4460 LOP(OP_GPBYNUMBER,XTERM);
4462 case KEY_getprotoent:
4474 case KEY_getpeername:
4475 UNI(OP_GETPEERNAME);
4477 case KEY_gethostbyname:
4480 case KEY_gethostbyaddr:
4481 LOP(OP_GHBYADDR,XTERM);
4483 case KEY_gethostent:
4486 case KEY_getnetbyname:
4489 case KEY_getnetbyaddr:
4490 LOP(OP_GNBYADDR,XTERM);
4495 case KEY_getservbyname:
4496 LOP(OP_GSBYNAME,XTERM);
4498 case KEY_getservbyport:
4499 LOP(OP_GSBYPORT,XTERM);
4501 case KEY_getservent:
4504 case KEY_getsockname:
4505 UNI(OP_GETSOCKNAME);
4507 case KEY_getsockopt:
4508 LOP(OP_GSOCKOPT,XTERM);
4530 yylval.ival = CopLINE(PL_curcop);
4534 LOP(OP_INDEX,XTERM);
4540 LOP(OP_IOCTL,XTERM);
4552 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4584 LOP(OP_LISTEN,XTERM);
4593 s = scan_pat(s,OP_MATCH);
4594 TERM(sublex_start());
4597 LOP(OP_MAPSTART, XREF);
4600 LOP(OP_MKDIR,XTERM);
4603 LOP(OP_MSGCTL,XTERM);
4606 LOP(OP_MSGGET,XTERM);
4609 LOP(OP_MSGRCV,XTERM);
4612 LOP(OP_MSGSND,XTERM);
4618 if (isIDFIRST_lazy_if(s,UTF)) {
4619 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4620 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4622 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4623 if (!PL_in_my_stash) {
4626 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4634 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4641 if (PL_expect != XSTATE)
4642 yyerror("\"no\" not allowed in expression");
4643 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4644 s = force_version(s);
4649 if (*s == '(' || (s = skipspace(s), *s == '('))
4656 if (isIDFIRST_lazy_if(s,UTF)) {
4658 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4660 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4661 Perl_warner(aTHX_ WARN_PRECEDENCE,
4662 "Precedence problem: open %.*s should be open(%.*s)",
4668 yylval.ival = OP_OR;
4678 LOP(OP_OPEN_DIR,XTERM);
4681 checkcomma(s,PL_tokenbuf,"filehandle");
4685 checkcomma(s,PL_tokenbuf,"filehandle");
4704 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4708 LOP(OP_PIPE_OP,XTERM);
4711 s = scan_str(s,FALSE,FALSE);
4713 missingterm((char*)0);
4714 yylval.ival = OP_CONST;
4715 TERM(sublex_start());
4721 s = scan_str(s,FALSE,FALSE);
4723 missingterm((char*)0);
4725 if (SvCUR(PL_lex_stuff)) {
4728 d = SvPV_force(PL_lex_stuff, len);
4731 for (; isSPACE(*d) && len; --len, ++d) ;
4734 if (!warned && ckWARN(WARN_QW)) {
4735 for (; !isSPACE(*d) && len; --len, ++d) {
4737 Perl_warner(aTHX_ WARN_QW,
4738 "Possible attempt to separate words with commas");
4741 else if (*d == '#') {
4742 Perl_warner(aTHX_ WARN_QW,
4743 "Possible attempt to put comments in qw() list");
4749 for (; !isSPACE(*d) && len; --len, ++d) ;
4751 sv = newSVpvn(b, d-b);
4752 if (DO_UTF8(PL_lex_stuff))
4754 words = append_elem(OP_LIST, words,
4755 newSVOP(OP_CONST, 0, tokeq(sv)));
4759 PL_nextval[PL_nexttoke].opval = words;
4764 SvREFCNT_dec(PL_lex_stuff);
4765 PL_lex_stuff = Nullsv;
4771 s = scan_str(s,FALSE,FALSE);
4773 missingterm((char*)0);
4774 yylval.ival = OP_STRINGIFY;
4775 if (SvIVX(PL_lex_stuff) == '\'')
4776 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4777 TERM(sublex_start());
4780 s = scan_pat(s,OP_QR);
4781 TERM(sublex_start());
4784 s = scan_str(s,FALSE,FALSE);
4786 missingterm((char*)0);
4787 yylval.ival = OP_BACKTICK;
4789 TERM(sublex_start());
4796 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4797 s = force_version(s);
4800 *PL_tokenbuf = '\0';
4801 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4802 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4803 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4805 yyerror("<> should be quotes");
4813 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4817 LOP(OP_RENAME,XTERM);
4826 LOP(OP_RINDEX,XTERM);
4849 LOP(OP_REVERSE,XTERM);
4860 TERM(sublex_start());
4862 TOKEN(1); /* force error */
4871 LOP(OP_SELECT,XTERM);
4877 LOP(OP_SEMCTL,XTERM);
4880 LOP(OP_SEMGET,XTERM);
4883 LOP(OP_SEMOP,XTERM);
4889 LOP(OP_SETPGRP,XTERM);
4891 case KEY_setpriority:
4892 LOP(OP_SETPRIORITY,XTERM);
4894 case KEY_sethostent:
4900 case KEY_setservent:
4903 case KEY_setprotoent:
4913 LOP(OP_SEEKDIR,XTERM);
4915 case KEY_setsockopt:
4916 LOP(OP_SSOCKOPT,XTERM);
4922 LOP(OP_SHMCTL,XTERM);
4925 LOP(OP_SHMGET,XTERM);
4928 LOP(OP_SHMREAD,XTERM);
4931 LOP(OP_SHMWRITE,XTERM);
4934 LOP(OP_SHUTDOWN,XTERM);
4943 LOP(OP_SOCKET,XTERM);
4945 case KEY_socketpair:
4946 LOP(OP_SOCKPAIR,XTERM);
4949 checkcomma(s,PL_tokenbuf,"subroutine name");
4951 if (*s == ';' || *s == ')') /* probably a close */
4952 Perl_croak(aTHX_ "sort is now a reserved word");
4954 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4958 LOP(OP_SPLIT,XTERM);
4961 LOP(OP_SPRINTF,XTERM);
4964 LOP(OP_SPLICE,XTERM);
4979 LOP(OP_SUBSTR,XTERM);
4985 char tmpbuf[sizeof PL_tokenbuf];
4987 expectation attrful;
4988 bool have_name, have_proto;
4993 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4994 (*s == ':' && s[1] == ':'))
4997 attrful = XATTRBLOCK;
4998 /* remember buffer pos'n for later force_word */
4999 tboffset = s - PL_oldbufptr;
5000 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
5001 if (strchr(tmpbuf, ':'))
5002 sv_setpv(PL_subname, tmpbuf);
5004 sv_setsv(PL_subname,PL_curstname);
5005 sv_catpvn(PL_subname,"::",2);
5006 sv_catpvn(PL_subname,tmpbuf,len);
5013 Perl_croak(aTHX_ "Missing name in \"my sub\"");
5014 PL_expect = XTERMBLOCK;
5015 attrful = XATTRTERM;
5016 sv_setpv(PL_subname,"?");
5020 if (key == KEY_format) {
5022 PL_lex_formbrack = PL_lex_brackets + 1;
5024 (void) force_word(PL_oldbufptr + tboffset, WORD,
5029 /* Look for a prototype */
5033 s = scan_str(s,FALSE,FALSE);
5035 Perl_croak(aTHX_ "Prototype not terminated");
5037 d = SvPVX(PL_lex_stuff);
5039 for (p = d; *p; ++p) {
5044 SvCUR(PL_lex_stuff) = tmp;
5052 if (*s == ':' && s[1] != ':')
5053 PL_expect = attrful;
5056 PL_nextval[PL_nexttoke].opval =
5057 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
5058 PL_lex_stuff = Nullsv;
5062 sv_setpv(PL_subname,"__ANON__");
5065 (void) force_word(PL_oldbufptr + tboffset, WORD,
5074 LOP(OP_SYSTEM,XREF);
5077 LOP(OP_SYMLINK,XTERM);
5080 LOP(OP_SYSCALL,XTERM);
5083 LOP(OP_SYSOPEN,XTERM);
5086 LOP(OP_SYSSEEK,XTERM);
5089 LOP(OP_SYSREAD,XTERM);
5092 LOP(OP_SYSWRITE,XTERM);
5096 TERM(sublex_start());
5117 LOP(OP_TRUNCATE,XTERM);
5129 yylval.ival = CopLINE(PL_curcop);
5133 yylval.ival = CopLINE(PL_curcop);
5137 LOP(OP_UNLINK,XTERM);
5143 LOP(OP_UNPACK,XTERM);
5146 LOP(OP_UTIME,XTERM);
5149 if (ckWARN(WARN_UMASK)) {
5150 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
5151 if (*d != '0' && isDIGIT(*d))
5152 Perl_warner(aTHX_ WARN_UMASK,
5153 "umask: argument is missing initial 0");
5158 LOP(OP_UNSHIFT,XTERM);
5161 if (PL_expect != XSTATE)
5162 yyerror("\"use\" not allowed in expression");
5164 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
5165 s = force_version(s);
5166 if (*s == ';' || (s = skipspace(s), *s == ';')) {
5167 PL_nextval[PL_nexttoke].opval = Nullop;
5172 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5173 s = force_version(s);
5185 yylval.ival = CopLINE(PL_curcop);
5189 PL_hints |= HINT_BLOCK_SCOPE;
5196 LOP(OP_WAITPID,XTERM);
5204 static char ctl_l[2];
5206 if (ctl_l[0] == '\0')
5207 ctl_l[0] = toCTRL('L');
5208 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5211 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5216 if (PL_expect == XOPERATOR)
5222 yylval.ival = OP_XOR;
5227 TERM(sublex_start());
5232 #pragma segment Main
5236 Perl_keyword(pTHX_ register char *d, I32 len)
5241 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5242 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5243 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5244 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5245 if (strEQ(d,"__END__")) return KEY___END__;
5249 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5254 if (strEQ(d,"and")) return -KEY_and;
5255 if (strEQ(d,"abs")) return -KEY_abs;
5258 if (strEQ(d,"alarm")) return -KEY_alarm;
5259 if (strEQ(d,"atan2")) return -KEY_atan2;
5262 if (strEQ(d,"accept")) return -KEY_accept;
5267 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5270 if (strEQ(d,"bless")) return -KEY_bless;
5271 if (strEQ(d,"bind")) return -KEY_bind;
5272 if (strEQ(d,"binmode")) return -KEY_binmode;
5275 if (strEQ(d,"CORE")) return -KEY_CORE;
5276 if (strEQ(d,"CHECK")) return KEY_CHECK;
5281 if (strEQ(d,"cmp")) return -KEY_cmp;
5282 if (strEQ(d,"chr")) return -KEY_chr;
5283 if (strEQ(d,"cos")) return -KEY_cos;
5286 if (strEQ(d,"chop")) return -KEY_chop;
5289 if (strEQ(d,"close")) return -KEY_close;
5290 if (strEQ(d,"chdir")) return -KEY_chdir;
5291 if (strEQ(d,"chomp")) return -KEY_chomp;
5292 if (strEQ(d,"chmod")) return -KEY_chmod;
5293 if (strEQ(d,"chown")) return -KEY_chown;
5294 if (strEQ(d,"crypt")) return -KEY_crypt;
5297 if (strEQ(d,"chroot")) return -KEY_chroot;
5298 if (strEQ(d,"caller")) return -KEY_caller;
5301 if (strEQ(d,"connect")) return -KEY_connect;
5304 if (strEQ(d,"closedir")) return -KEY_closedir;
5305 if (strEQ(d,"continue")) return -KEY_continue;
5310 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5315 if (strEQ(d,"do")) return KEY_do;
5318 if (strEQ(d,"die")) return -KEY_die;
5321 if (strEQ(d,"dump")) return -KEY_dump;
5324 if (strEQ(d,"delete")) return KEY_delete;
5327 if (strEQ(d,"defined")) return KEY_defined;
5328 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5331 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5336 if (strEQ(d,"END")) return KEY_END;
5341 if (strEQ(d,"eq")) return -KEY_eq;
5344 if (strEQ(d,"eof")) return -KEY_eof;
5345 if (strEQ(d,"exp")) return -KEY_exp;
5348 if (strEQ(d,"else")) return KEY_else;
5349 if (strEQ(d,"exit")) return -KEY_exit;
5350 if (strEQ(d,"eval")) return KEY_eval;
5351 if (strEQ(d,"exec")) return -KEY_exec;
5352 if (strEQ(d,"each")) return -KEY_each;
5355 if (strEQ(d,"elsif")) return KEY_elsif;
5358 if (strEQ(d,"exists")) return KEY_exists;
5359 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5362 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5363 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5366 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5369 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5370 if (strEQ(d,"endservent")) return -KEY_endservent;
5373 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5380 if (strEQ(d,"for")) return KEY_for;
5383 if (strEQ(d,"fork")) return -KEY_fork;
5386 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5387 if (strEQ(d,"flock")) return -KEY_flock;
5390 if (strEQ(d,"format")) return KEY_format;
5391 if (strEQ(d,"fileno")) return -KEY_fileno;
5394 if (strEQ(d,"foreach")) return KEY_foreach;
5397 if (strEQ(d,"formline")) return -KEY_formline;
5402 if (strnEQ(d,"get",3)) {
5407 if (strEQ(d,"ppid")) return -KEY_getppid;
5408 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5411 if (strEQ(d,"pwent")) return -KEY_getpwent;
5412 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5413 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5416 if (strEQ(d,"peername")) return -KEY_getpeername;
5417 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5418 if (strEQ(d,"priority")) return -KEY_getpriority;
5421 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5424 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5428 else if (*d == 'h') {
5429 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5430 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5431 if (strEQ(d,"hostent")) return -KEY_gethostent;
5433 else if (*d == 'n') {
5434 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5435 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5436 if (strEQ(d,"netent")) return -KEY_getnetent;
5438 else if (*d == 's') {
5439 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5440 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5441 if (strEQ(d,"servent")) return -KEY_getservent;
5442 if (strEQ(d,"sockname")) return -KEY_getsockname;
5443 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5445 else if (*d == 'g') {
5446 if (strEQ(d,"grent")) return -KEY_getgrent;
5447 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5448 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5450 else if (*d == 'l') {
5451 if (strEQ(d,"login")) return -KEY_getlogin;
5453 else if (strEQ(d,"c")) return -KEY_getc;
5458 if (strEQ(d,"gt")) return -KEY_gt;
5459 if (strEQ(d,"ge")) return -KEY_ge;
5462 if (strEQ(d,"grep")) return KEY_grep;
5463 if (strEQ(d,"goto")) return KEY_goto;
5464 if (strEQ(d,"glob")) return KEY_glob;
5467 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5472 if (strEQ(d,"hex")) return -KEY_hex;
5475 if (strEQ(d,"INIT")) return KEY_INIT;
5480 if (strEQ(d,"if")) return KEY_if;
5483 if (strEQ(d,"int")) return -KEY_int;
5486 if (strEQ(d,"index")) return -KEY_index;
5487 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5492 if (strEQ(d,"join")) return -KEY_join;
5496 if (strEQ(d,"keys")) return -KEY_keys;
5497 if (strEQ(d,"kill")) return -KEY_kill;
5503 if (strEQ(d,"lt")) return -KEY_lt;
5504 if (strEQ(d,"le")) return -KEY_le;
5505 if (strEQ(d,"lc")) return -KEY_lc;
5508 if (strEQ(d,"log")) return -KEY_log;
5511 if (strEQ(d,"last")) return KEY_last;
5512 if (strEQ(d,"link")) return -KEY_link;
5513 if (strEQ(d,"lock")) return -KEY_lock;
5516 if (strEQ(d,"local")) return KEY_local;
5517 if (strEQ(d,"lstat")) return -KEY_lstat;
5520 if (strEQ(d,"length")) return -KEY_length;
5521 if (strEQ(d,"listen")) return -KEY_listen;
5524 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5527 if (strEQ(d,"localtime")) return -KEY_localtime;
5533 case 1: return KEY_m;
5535 if (strEQ(d,"my")) return KEY_my;
5538 if (strEQ(d,"map")) return KEY_map;
5541 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5544 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5545 if (strEQ(d,"msgget")) return -KEY_msgget;
5546 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5547 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5552 if (strEQ(d,"next")) return KEY_next;
5553 if (strEQ(d,"ne")) return -KEY_ne;
5554 if (strEQ(d,"not")) return -KEY_not;
5555 if (strEQ(d,"no")) return KEY_no;
5560 if (strEQ(d,"or")) return -KEY_or;
5563 if (strEQ(d,"ord")) return -KEY_ord;
5564 if (strEQ(d,"oct")) return -KEY_oct;
5565 if (strEQ(d,"our")) return KEY_our;
5568 if (strEQ(d,"open")) return -KEY_open;
5571 if (strEQ(d,"opendir")) return -KEY_opendir;
5578 if (strEQ(d,"pop")) return -KEY_pop;
5579 if (strEQ(d,"pos")) return KEY_pos;
5582 if (strEQ(d,"push")) return -KEY_push;
5583 if (strEQ(d,"pack")) return -KEY_pack;
5584 if (strEQ(d,"pipe")) return -KEY_pipe;
5587 if (strEQ(d,"print")) return KEY_print;
5590 if (strEQ(d,"printf")) return KEY_printf;
5593 if (strEQ(d,"package")) return KEY_package;
5596 if (strEQ(d,"prototype")) return KEY_prototype;
5601 if (strEQ(d,"q")) return KEY_q;
5602 if (strEQ(d,"qr")) return KEY_qr;
5603 if (strEQ(d,"qq")) return KEY_qq;
5604 if (strEQ(d,"qw")) return KEY_qw;
5605 if (strEQ(d,"qx")) return KEY_qx;
5607 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5612 if (strEQ(d,"ref")) return -KEY_ref;
5615 if (strEQ(d,"read")) return -KEY_read;
5616 if (strEQ(d,"rand")) return -KEY_rand;
5617 if (strEQ(d,"recv")) return -KEY_recv;
5618 if (strEQ(d,"redo")) return KEY_redo;
5621 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5622 if (strEQ(d,"reset")) return -KEY_reset;
5625 if (strEQ(d,"return")) return KEY_return;
5626 if (strEQ(d,"rename")) return -KEY_rename;
5627 if (strEQ(d,"rindex")) return -KEY_rindex;
5630 if (strEQ(d,"require")) return -KEY_require;
5631 if (strEQ(d,"reverse")) return -KEY_reverse;
5632 if (strEQ(d,"readdir")) return -KEY_readdir;
5635 if (strEQ(d,"readlink")) return -KEY_readlink;
5636 if (strEQ(d,"readline")) return -KEY_readline;
5637 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5640 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5646 case 0: return KEY_s;
5648 if (strEQ(d,"scalar")) return KEY_scalar;
5653 if (strEQ(d,"seek")) return -KEY_seek;
5654 if (strEQ(d,"send")) return -KEY_send;
5657 if (strEQ(d,"semop")) return -KEY_semop;
5660 if (strEQ(d,"select")) return -KEY_select;
5661 if (strEQ(d,"semctl")) return -KEY_semctl;
5662 if (strEQ(d,"semget")) return -KEY_semget;
5665 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5666 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5669 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5670 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5673 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5676 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5677 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5678 if (strEQ(d,"setservent")) return -KEY_setservent;
5681 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5682 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5689 if (strEQ(d,"shift")) return -KEY_shift;
5692 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5693 if (strEQ(d,"shmget")) return -KEY_shmget;
5696 if (strEQ(d,"shmread")) return -KEY_shmread;
5699 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5700 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5705 if (strEQ(d,"sin")) return -KEY_sin;
5708 if (strEQ(d,"sleep")) return -KEY_sleep;
5711 if (strEQ(d,"sort")) return KEY_sort;
5712 if (strEQ(d,"socket")) return -KEY_socket;
5713 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5716 if (strEQ(d,"split")) return KEY_split;
5717 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5718 if (strEQ(d,"splice")) return -KEY_splice;
5721 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5724 if (strEQ(d,"srand")) return -KEY_srand;
5727 if (strEQ(d,"stat")) return -KEY_stat;
5728 if (strEQ(d,"study")) return KEY_study;
5731 if (strEQ(d,"substr")) return -KEY_substr;
5732 if (strEQ(d,"sub")) return KEY_sub;
5737 if (strEQ(d,"system")) return -KEY_system;
5740 if (strEQ(d,"symlink")) return -KEY_symlink;
5741 if (strEQ(d,"syscall")) return -KEY_syscall;
5742 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5743 if (strEQ(d,"sysread")) return -KEY_sysread;
5744 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5747 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5756 if (strEQ(d,"tr")) return KEY_tr;
5759 if (strEQ(d,"tie")) return KEY_tie;
5762 if (strEQ(d,"tell")) return -KEY_tell;
5763 if (strEQ(d,"tied")) return KEY_tied;
5764 if (strEQ(d,"time")) return -KEY_time;
5767 if (strEQ(d,"times")) return -KEY_times;
5770 if (strEQ(d,"telldir")) return -KEY_telldir;
5773 if (strEQ(d,"truncate")) return -KEY_truncate;
5780 if (strEQ(d,"uc")) return -KEY_uc;
5783 if (strEQ(d,"use")) return KEY_use;
5786 if (strEQ(d,"undef")) return KEY_undef;
5787 if (strEQ(d,"until")) return KEY_until;
5788 if (strEQ(d,"untie")) return KEY_untie;
5789 if (strEQ(d,"utime")) return -KEY_utime;
5790 if (strEQ(d,"umask")) return -KEY_umask;
5793 if (strEQ(d,"unless")) return KEY_unless;
5794 if (strEQ(d,"unpack")) return -KEY_unpack;
5795 if (strEQ(d,"unlink")) return -KEY_unlink;
5798 if (strEQ(d,"unshift")) return -KEY_unshift;
5799 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5804 if (strEQ(d,"values")) return -KEY_values;
5805 if (strEQ(d,"vec")) return -KEY_vec;
5810 if (strEQ(d,"warn")) return -KEY_warn;
5811 if (strEQ(d,"wait")) return -KEY_wait;
5814 if (strEQ(d,"while")) return KEY_while;
5815 if (strEQ(d,"write")) return -KEY_write;
5818 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5821 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5826 if (len == 1) return -KEY_x;
5827 if (strEQ(d,"xor")) return -KEY_xor;
5830 if (len == 1) return KEY_y;
5839 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5843 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5844 if (ckWARN(WARN_SYNTAX)) {
5846 for (w = s+2; *w && level; w++) {
5853 for (; *w && isSPACE(*w); w++) ;
5854 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5855 Perl_warner(aTHX_ WARN_SYNTAX,
5856 "%s (...) interpreted as function",name);
5859 while (s < PL_bufend && isSPACE(*s))
5863 while (s < PL_bufend && isSPACE(*s))
5865 if (isIDFIRST_lazy_if(s,UTF)) {
5867 while (isALNUM_lazy_if(s,UTF))
5869 while (s < PL_bufend && isSPACE(*s))
5874 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5878 Perl_croak(aTHX_ "No comma allowed after %s", what);
5883 /* Either returns sv, or mortalizes sv and returns a new SV*.
5884 Best used as sv=new_constant(..., sv, ...).
5885 If s, pv are NULL, calls subroutine with one argument,
5886 and type is used with error messages only. */
5889 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5893 HV *table = GvHV(PL_hintgv); /* ^H */
5897 const char *why1, *why2, *why3;
5899 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5902 why2 = strEQ(key,"charnames")
5903 ? "(possibly a missing \"use charnames ...\")"
5905 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
5906 (type ? type: "undef"), why2);
5908 /* This is convoluted and evil ("goto considered harmful")
5909 * but I do not understand the intricacies of all the different
5910 * failure modes of %^H in here. The goal here is to make
5911 * the most probable error message user-friendly. --jhi */
5916 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
5917 (type ? type: "undef"), why1, why2, why3);
5919 yyerror(SvPVX(msg));
5923 cvp = hv_fetch(table, key, strlen(key), FALSE);
5924 if (!cvp || !SvOK(*cvp)) {
5927 why3 = "} is not defined";
5930 sv_2mortal(sv); /* Parent created it permanently */
5933 pv = sv_2mortal(newSVpvn(s, len));
5935 typesv = sv_2mortal(newSVpv(type, 0));
5937 typesv = &PL_sv_undef;
5939 PUSHSTACKi(PERLSI_OVERLOAD);
5951 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5955 /* Check the eval first */
5956 if (!PL_in_eval && SvTRUE(ERRSV)) {
5958 sv_catpv(ERRSV, "Propagated");
5959 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5961 res = SvREFCNT_inc(sv);
5965 (void)SvREFCNT_inc(res);
5974 why1 = "Call to &{$^H{";
5976 why3 = "}} did not return a defined value";
5985 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5987 register char *d = dest;
5988 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5991 Perl_croak(aTHX_ ident_too_long);
5992 if (isALNUM(*s)) /* UTF handled below */
5994 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5999 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
6003 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6004 char *t = s + UTF8SKIP(s);
6005 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6007 if (d + (t - s) > e)
6008 Perl_croak(aTHX_ ident_too_long);
6009 Copy(s, d, t - s, char);
6022 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
6032 e = d + destlen - 3; /* two-character token, ending NUL */
6034 while (isDIGIT(*s)) {
6036 Perl_croak(aTHX_ ident_too_long);
6043 Perl_croak(aTHX_ ident_too_long);
6044 if (isALNUM(*s)) /* UTF handled below */
6046 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
6051 else if (*s == ':' && s[1] == ':') {
6055 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6056 char *t = s + UTF8SKIP(s);
6057 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6059 if (d + (t - s) > e)
6060 Perl_croak(aTHX_ ident_too_long);
6061 Copy(s, d, t - s, char);
6072 if (PL_lex_state != LEX_NORMAL)
6073 PL_lex_state = LEX_INTERPENDMAYBE;
6076 if (*s == '$' && s[1] &&
6077 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
6090 if (*d == '^' && *s && isCONTROLVAR(*s)) {
6095 if (isSPACE(s[-1])) {
6098 if (!SPACE_OR_TAB(ch)) {
6104 if (isIDFIRST_lazy_if(d,UTF)) {
6108 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
6110 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
6113 Copy(s, d, e - s, char);
6118 while ((isALNUM(*s) || *s == ':') && d < e)
6121 Perl_croak(aTHX_ ident_too_long);
6124 while (s < send && SPACE_OR_TAB(*s)) s++;
6125 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
6126 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
6127 const char *brack = *s == '[' ? "[...]" : "{...}";
6128 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6129 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
6130 funny, dest, brack, funny, dest, brack);
6133 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
6137 /* Handle extended ${^Foo} variables
6138 * 1999-02-27 mjd-perl-patch@plover.com */
6139 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6143 while (isALNUM(*s) && d < e) {
6147 Perl_croak(aTHX_ ident_too_long);
6152 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6153 PL_lex_state = LEX_INTERPEND;
6156 if (PL_lex_state == LEX_NORMAL) {
6157 if (ckWARN(WARN_AMBIGUOUS) &&
6158 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
6160 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6161 "Ambiguous use of %c{%s} resolved to %c%s",
6162 funny, dest, funny, dest);
6167 s = bracket; /* let the parser handle it */
6171 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6172 PL_lex_state = LEX_INTERPEND;
6177 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
6182 *pmfl |= PMf_GLOBAL;
6184 *pmfl |= PMf_CONTINUE;
6188 *pmfl |= PMf_MULTILINE;
6190 *pmfl |= PMf_SINGLELINE;
6192 *pmfl |= PMf_EXTENDED;
6196 S_scan_pat(pTHX_ char *start, I32 type)
6201 s = scan_str(start,FALSE,FALSE);
6203 Perl_croak(aTHX_ "Search pattern not terminated");
6205 pm = (PMOP*)newPMOP(type, 0);
6206 if (PL_multi_open == '?')
6207 pm->op_pmflags |= PMf_ONCE;
6209 while (*s && strchr("iomsx", *s))
6210 pmflag(&pm->op_pmflags,*s++);
6213 while (*s && strchr("iogcmsx", *s))
6214 pmflag(&pm->op_pmflags,*s++);
6216 pm->op_pmpermflags = pm->op_pmflags;
6218 PL_lex_op = (OP*)pm;
6219 yylval.ival = OP_MATCH;
6224 S_scan_subst(pTHX_ char *start)
6231 yylval.ival = OP_NULL;
6233 s = scan_str(start,FALSE,FALSE);
6236 Perl_croak(aTHX_ "Substitution pattern not terminated");
6238 if (s[-1] == PL_multi_open)
6241 first_start = PL_multi_start;
6242 s = scan_str(s,FALSE,FALSE);
6245 SvREFCNT_dec(PL_lex_stuff);
6246 PL_lex_stuff = Nullsv;
6248 Perl_croak(aTHX_ "Substitution replacement not terminated");
6250 PL_multi_start = first_start; /* so whole substitution is taken together */
6252 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6258 else if (strchr("iogcmsx", *s))
6259 pmflag(&pm->op_pmflags,*s++);
6266 PL_sublex_info.super_bufptr = s;
6267 PL_sublex_info.super_bufend = PL_bufend;
6269 pm->op_pmflags |= PMf_EVAL;
6270 repl = newSVpvn("",0);
6272 sv_catpv(repl, es ? "eval " : "do ");
6273 sv_catpvn(repl, "{ ", 2);
6274 sv_catsv(repl, PL_lex_repl);
6275 sv_catpvn(repl, " };", 2);
6277 SvREFCNT_dec(PL_lex_repl);
6281 pm->op_pmpermflags = pm->op_pmflags;
6282 PL_lex_op = (OP*)pm;
6283 yylval.ival = OP_SUBST;
6288 S_scan_trans(pTHX_ char *start)
6297 yylval.ival = OP_NULL;
6299 s = scan_str(start,FALSE,FALSE);
6301 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6302 if (s[-1] == PL_multi_open)
6305 s = scan_str(s,FALSE,FALSE);
6308 SvREFCNT_dec(PL_lex_stuff);
6309 PL_lex_stuff = Nullsv;
6311 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6314 complement = del = squash = 0;
6315 while (strchr("cds", *s)) {
6317 complement = OPpTRANS_COMPLEMENT;
6319 del = OPpTRANS_DELETE;
6321 squash = OPpTRANS_SQUASH;
6325 New(803, tbl, complement&&!del?258:256, short);
6326 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6327 o->op_private = del|squash|complement|
6328 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6329 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
6332 yylval.ival = OP_TRANS;
6337 S_scan_heredoc(pTHX_ register char *s)
6340 I32 op_type = OP_SCALAR;
6347 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6351 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6354 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6355 if (*peek && strchr("`'\"",*peek)) {
6358 s = delimcpy(d, e, s, PL_bufend, term, &len);
6368 if (!isALNUM_lazy_if(s,UTF))
6369 deprecate("bare << to mean <<\"\"");
6370 for (; isALNUM_lazy_if(s,UTF); s++) {
6375 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6376 Perl_croak(aTHX_ "Delimiter for here document is too long");
6379 len = d - PL_tokenbuf;
6380 #ifndef PERL_STRICT_CR
6381 d = strchr(s, '\r');
6385 while (s < PL_bufend) {
6391 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6400 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6405 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6406 herewas = newSVpvn(s,PL_bufend-s);
6408 s--, herewas = newSVpvn(s,d-s);
6409 s += SvCUR(herewas);
6411 tmpstr = NEWSV(87,79);
6412 sv_upgrade(tmpstr, SVt_PVIV);
6417 else if (term == '`') {
6418 op_type = OP_BACKTICK;
6419 SvIVX(tmpstr) = '\\';
6423 PL_multi_start = CopLINE(PL_curcop);
6424 PL_multi_open = PL_multi_close = '<';
6425 term = *PL_tokenbuf;
6426 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6427 char *bufptr = PL_sublex_info.super_bufptr;
6428 char *bufend = PL_sublex_info.super_bufend;
6429 char *olds = s - SvCUR(herewas);
6430 s = strchr(bufptr, '\n');
6434 while (s < bufend &&
6435 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6437 CopLINE_inc(PL_curcop);
6440 CopLINE_set(PL_curcop, PL_multi_start);
6441 missingterm(PL_tokenbuf);
6443 sv_setpvn(herewas,bufptr,d-bufptr+1);
6444 sv_setpvn(tmpstr,d+1,s-d);
6446 sv_catpvn(herewas,s,bufend-s);
6447 (void)strcpy(bufptr,SvPVX(herewas));
6454 while (s < PL_bufend &&
6455 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6457 CopLINE_inc(PL_curcop);
6459 if (s >= PL_bufend) {
6460 CopLINE_set(PL_curcop, PL_multi_start);
6461 missingterm(PL_tokenbuf);
6463 sv_setpvn(tmpstr,d+1,s-d);
6465 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6467 sv_catpvn(herewas,s,PL_bufend-s);
6468 sv_setsv(PL_linestr,herewas);
6469 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6470 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6471 PL_last_lop = PL_last_uni = Nullch;
6474 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6475 while (s >= PL_bufend) { /* multiple line string? */
6477 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6478 CopLINE_set(PL_curcop, PL_multi_start);
6479 missingterm(PL_tokenbuf);
6481 CopLINE_inc(PL_curcop);
6482 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6483 PL_last_lop = PL_last_uni = Nullch;
6484 #ifndef PERL_STRICT_CR
6485 if (PL_bufend - PL_linestart >= 2) {
6486 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6487 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6489 PL_bufend[-2] = '\n';
6491 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6493 else if (PL_bufend[-1] == '\r')
6494 PL_bufend[-1] = '\n';
6496 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6497 PL_bufend[-1] = '\n';
6499 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6500 SV *sv = NEWSV(88,0);
6502 sv_upgrade(sv, SVt_PVMG);
6503 sv_setsv(sv,PL_linestr);
6504 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6506 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6509 sv_catsv(PL_linestr,herewas);
6510 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6514 sv_catsv(tmpstr,PL_linestr);
6519 PL_multi_end = CopLINE(PL_curcop);
6520 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6521 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6522 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6524 SvREFCNT_dec(herewas);
6525 if (UTF && !IN_BYTE && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
6527 PL_lex_stuff = tmpstr;
6528 yylval.ival = op_type;
6533 takes: current position in input buffer
6534 returns: new position in input buffer
6535 side-effects: yylval and lex_op are set.
6540 <FH> read from filehandle
6541 <pkg::FH> read from package qualified filehandle
6542 <pkg'FH> read from package qualified filehandle
6543 <$fh> read from filehandle in $fh
6549 S_scan_inputsymbol(pTHX_ char *start)
6551 register char *s = start; /* current position in buffer */
6557 d = PL_tokenbuf; /* start of temp holding space */
6558 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6559 end = strchr(s, '\n');
6562 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6564 /* die if we didn't have space for the contents of the <>,
6565 or if it didn't end, or if we see a newline
6568 if (len >= sizeof PL_tokenbuf)
6569 Perl_croak(aTHX_ "Excessively long <> operator");
6571 Perl_croak(aTHX_ "Unterminated <> operator");
6576 Remember, only scalar variables are interpreted as filehandles by
6577 this code. Anything more complex (e.g., <$fh{$num}>) will be
6578 treated as a glob() call.
6579 This code makes use of the fact that except for the $ at the front,
6580 a scalar variable and a filehandle look the same.
6582 if (*d == '$' && d[1]) d++;
6584 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6585 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6588 /* If we've tried to read what we allow filehandles to look like, and
6589 there's still text left, then it must be a glob() and not a getline.
6590 Use scan_str to pull out the stuff between the <> and treat it
6591 as nothing more than a string.
6594 if (d - PL_tokenbuf != len) {
6595 yylval.ival = OP_GLOB;
6597 s = scan_str(start,FALSE,FALSE);
6599 Perl_croak(aTHX_ "Glob not terminated");
6603 /* we're in a filehandle read situation */
6606 /* turn <> into <ARGV> */
6608 (void)strcpy(d,"ARGV");
6610 /* if <$fh>, create the ops to turn the variable into a
6616 /* try to find it in the pad for this block, otherwise find
6617 add symbol table ops
6619 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6620 OP *o = newOP(OP_PADSV, 0);
6622 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6625 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6626 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6627 newUNOP(OP_RV2SV, 0,
6628 newGVOP(OP_GV, 0, gv)));
6630 PL_lex_op->op_flags |= OPf_SPECIAL;
6631 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6632 yylval.ival = OP_NULL;
6635 /* If it's none of the above, it must be a literal filehandle
6636 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6638 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6639 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6640 yylval.ival = OP_NULL;
6649 takes: start position in buffer
6650 keep_quoted preserve \ on the embedded delimiter(s)
6651 keep_delims preserve the delimiters around the string
6652 returns: position to continue reading from buffer
6653 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6654 updates the read buffer.
6656 This subroutine pulls a string out of the input. It is called for:
6657 q single quotes q(literal text)
6658 ' single quotes 'literal text'
6659 qq double quotes qq(interpolate $here please)
6660 " double quotes "interpolate $here please"
6661 qx backticks qx(/bin/ls -l)
6662 ` backticks `/bin/ls -l`
6663 qw quote words @EXPORT_OK = qw( func() $spam )
6664 m// regexp match m/this/
6665 s/// regexp substitute s/this/that/
6666 tr/// string transliterate tr/this/that/
6667 y/// string transliterate y/this/that/
6668 ($*@) sub prototypes sub foo ($)
6669 (stuff) sub attr parameters sub foo : attr(stuff)
6670 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6672 In most of these cases (all but <>, patterns and transliterate)
6673 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6674 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6675 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6678 It skips whitespace before the string starts, and treats the first
6679 character as the delimiter. If the delimiter is one of ([{< then
6680 the corresponding "close" character )]}> is used as the closing
6681 delimiter. It allows quoting of delimiters, and if the string has
6682 balanced delimiters ([{<>}]) it allows nesting.
6684 On success, the SV with the resulting string is put into lex_stuff or,
6685 if that is already non-NULL, into lex_repl. The second case occurs only
6686 when parsing the RHS of the special constructs s/// and tr/// (y///).
6687 For convenience, the terminating delimiter character is stuffed into
6692 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6694 SV *sv; /* scalar value: string */
6695 char *tmps; /* temp string, used for delimiter matching */
6696 register char *s = start; /* current position in the buffer */
6697 register char term; /* terminating character */
6698 register char *to; /* current position in the sv's data */
6699 I32 brackets = 1; /* bracket nesting level */
6700 bool has_utf8 = FALSE; /* is there any utf8 content? */
6702 /* skip space before the delimiter */
6706 /* mark where we are, in case we need to report errors */
6709 /* after skipping whitespace, the next character is the terminator */
6711 if (!UTF8_IS_INVARIANT((U8)term) && UTF)
6714 /* mark where we are */
6715 PL_multi_start = CopLINE(PL_curcop);
6716 PL_multi_open = term;
6718 /* find corresponding closing delimiter */
6719 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6721 PL_multi_close = term;
6723 /* create a new SV to hold the contents. 87 is leak category, I'm
6724 assuming. 79 is the SV's initial length. What a random number. */
6726 sv_upgrade(sv, SVt_PVIV);
6728 (void)SvPOK_only(sv); /* validate pointer */
6730 /* move past delimiter and try to read a complete string */
6732 sv_catpvn(sv, s, 1);
6735 /* extend sv if need be */
6736 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6737 /* set 'to' to the next character in the sv's string */
6738 to = SvPVX(sv)+SvCUR(sv);
6740 /* if open delimiter is the close delimiter read unbridle */
6741 if (PL_multi_open == PL_multi_close) {
6742 for (; s < PL_bufend; s++,to++) {
6743 /* embedded newlines increment the current line number */
6744 if (*s == '\n' && !PL_rsfp)
6745 CopLINE_inc(PL_curcop);
6746 /* handle quoted delimiters */
6747 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6748 if (!keep_quoted && s[1] == term)
6750 /* any other quotes are simply copied straight through */
6754 /* terminate when run out of buffer (the for() condition), or
6755 have found the terminator */
6756 else if (*s == term)
6758 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6764 /* if the terminator isn't the same as the start character (e.g.,
6765 matched brackets), we have to allow more in the quoting, and
6766 be prepared for nested brackets.
6769 /* read until we run out of string, or we find the terminator */
6770 for (; s < PL_bufend; s++,to++) {
6771 /* embedded newlines increment the line count */
6772 if (*s == '\n' && !PL_rsfp)
6773 CopLINE_inc(PL_curcop);
6774 /* backslashes can escape the open or closing characters */
6775 if (*s == '\\' && s+1 < PL_bufend) {
6777 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6782 /* allow nested opens and closes */
6783 else if (*s == PL_multi_close && --brackets <= 0)
6785 else if (*s == PL_multi_open)
6787 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6792 /* terminate the copied string and update the sv's end-of-string */
6794 SvCUR_set(sv, to - SvPVX(sv));
6797 * this next chunk reads more into the buffer if we're not done yet
6801 break; /* handle case where we are done yet :-) */
6803 #ifndef PERL_STRICT_CR
6804 if (to - SvPVX(sv) >= 2) {
6805 if ((to[-2] == '\r' && to[-1] == '\n') ||
6806 (to[-2] == '\n' && to[-1] == '\r'))
6810 SvCUR_set(sv, to - SvPVX(sv));
6812 else if (to[-1] == '\r')
6815 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6819 /* if we're out of file, or a read fails, bail and reset the current
6820 line marker so we can report where the unterminated string began
6823 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6825 CopLINE_set(PL_curcop, PL_multi_start);
6828 /* we read a line, so increment our line counter */
6829 CopLINE_inc(PL_curcop);
6831 /* update debugger info */
6832 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6833 SV *sv = NEWSV(88,0);
6835 sv_upgrade(sv, SVt_PVMG);
6836 sv_setsv(sv,PL_linestr);
6837 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6840 /* having changed the buffer, we must update PL_bufend */
6841 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6842 PL_last_lop = PL_last_uni = Nullch;
6845 /* at this point, we have successfully read the delimited string */
6848 sv_catpvn(sv, s, 1);
6851 PL_multi_end = CopLINE(PL_curcop);
6854 /* if we allocated too much space, give some back */
6855 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6856 SvLEN_set(sv, SvCUR(sv) + 1);
6857 Renew(SvPVX(sv), SvLEN(sv), char);
6860 /* decide whether this is the first or second quoted string we've read
6873 takes: pointer to position in buffer
6874 returns: pointer to new position in buffer
6875 side-effects: builds ops for the constant in yylval.op
6877 Read a number in any of the formats that Perl accepts:
6879 \d(_?\d)*(\.(\d(_?\d)*)?)?[Ee](\d+) 12 12.34 12.
6880 \.\d(_?\d)*[Ee](\d+) .34
6883 0x[0-9A-Fa-f](_?[0-9A-Fa-f])*
6885 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6888 If it reads a number without a decimal point or an exponent, it will
6889 try converting the number to an integer and see if it can do so
6890 without loss of precision.
6894 Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
6896 register char *s = start; /* current position in buffer */
6897 register char *d; /* destination in temp buffer */
6898 register char *e; /* end of temp buffer */
6899 NV nv; /* number read, as a double */
6900 SV *sv = Nullsv; /* place to put the converted number */
6901 bool floatit; /* boolean: int or float? */
6902 char *lastub = 0; /* position of last underbar */
6903 static char number_too_long[] = "Number too long";
6905 /* We use the first character to decide what type of number this is */
6909 Perl_croak(aTHX_ "panic: scan_num");
6911 /* if it starts with a 0, it could be an octal number, a decimal in
6912 0.13 disguise, or a hexadecimal number, or a binary number. */
6916 u holds the "number so far"
6917 shift the power of 2 of the base
6918 (hex == 4, octal == 3, binary == 1)
6919 overflowed was the number more than we can hold?
6921 Shift is used when we add a digit. It also serves as an "are
6922 we in octal/hex/binary?" indicator to disallow hex characters
6928 bool overflowed = FALSE;
6929 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6930 static char* bases[5] = { "", "binary", "", "octal",
6932 static char* Bases[5] = { "", "Binary", "", "Octal",
6934 static char *maxima[5] = { "",
6935 "0b11111111111111111111111111111111",
6939 char *base, *Base, *max;
6945 } else if (s[1] == 'b') {
6949 /* check for a decimal in disguise */
6950 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6952 /* so it must be octal */
6959 if (ckWARN(WARN_SYNTAX))
6960 Perl_warner(aTHX_ WARN_SYNTAX,
6961 "Misplaced _ in number");
6965 base = bases[shift];
6966 Base = Bases[shift];
6967 max = maxima[shift];
6969 /* read the rest of the number */
6971 /* x is used in the overflow test,
6972 b is the digit we're adding on. */
6977 /* if we don't mention it, we're done */
6981 /* _ are ignored -- but warned about if consecutive */
6983 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
6984 Perl_warner(aTHX_ WARN_SYNTAX,
6985 "Misplaced _ in number");
6989 /* 8 and 9 are not octal */
6992 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6996 case '2': case '3': case '4':
6997 case '5': case '6': case '7':
6999 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
7003 b = *s++ & 15; /* ASCII digit -> value of digit */
7007 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
7008 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
7009 /* make sure they said 0x */
7014 /* Prepare to put the digit we have onto the end
7015 of the number so far. We check for overflows.
7020 x = u << shift; /* make room for the digit */
7022 if ((x >> shift) != u
7023 && !(PL_hints & HINT_NEW_BINARY)) {
7026 if (ckWARN_d(WARN_OVERFLOW))
7027 Perl_warner(aTHX_ WARN_OVERFLOW,
7028 "Integer overflow in %s number",
7031 u = x | b; /* add the digit to the end */
7034 n *= nvshift[shift];
7035 /* If an NV has not enough bits in its
7036 * mantissa to represent an UV this summing of
7037 * small low-order numbers is a waste of time
7038 * (because the NV cannot preserve the
7039 * low-order bits anyway): we could just
7040 * remember when did we overflow and in the
7041 * end just multiply n by the right
7049 /* if we get here, we had success: make a scalar value from
7054 /* final misplaced underbar check */
7056 if (ckWARN(WARN_SYNTAX))
7057 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7062 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7063 Perl_warner(aTHX_ WARN_PORTABLE,
7064 "%s number > %s non-portable",
7070 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7071 Perl_warner(aTHX_ WARN_PORTABLE,
7072 "%s number > %s non-portable",
7077 if (PL_hints & HINT_NEW_BINARY)
7078 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
7083 handle decimal numbers.
7084 we're also sent here when we read a 0 as the first digit
7086 case '1': case '2': case '3': case '4': case '5':
7087 case '6': case '7': case '8': case '9': case '.':
7090 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
7093 /* read next group of digits and _ and copy into d */
7094 while (isDIGIT(*s) || *s == '_') {
7095 /* skip underscores, checking for misplaced ones
7099 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7100 Perl_warner(aTHX_ WARN_SYNTAX,
7101 "Misplaced _ in number");
7105 /* check for end of fixed-length buffer */
7107 Perl_croak(aTHX_ number_too_long);
7108 /* if we're ok, copy the character */
7113 /* final misplaced underbar check */
7114 if (lastub && s == lastub + 1) {
7115 if (ckWARN(WARN_SYNTAX))
7116 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7119 /* read a decimal portion if there is one. avoid
7120 3..5 being interpreted as the number 3. followed
7123 if (*s == '.' && s[1] != '.') {
7128 if (ckWARN(WARN_SYNTAX))
7129 Perl_warner(aTHX_ WARN_SYNTAX,
7130 "Misplaced _ in number");
7134 /* copy, ignoring underbars, until we run out of digits.
7136 for (; isDIGIT(*s) || *s == '_'; s++) {
7137 /* fixed length buffer check */
7139 Perl_croak(aTHX_ number_too_long);
7141 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7142 Perl_warner(aTHX_ WARN_SYNTAX,
7143 "Misplaced _ in number");
7149 /* fractional part ending in underbar? */
7151 if (ckWARN(WARN_SYNTAX))
7152 Perl_warner(aTHX_ WARN_SYNTAX,
7153 "Misplaced _ in number");
7155 if (*s == '.' && isDIGIT(s[1])) {
7156 /* oops, it's really a v-string, but without the "v" */
7162 /* read exponent part, if present */
7163 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
7167 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
7168 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
7170 /* allow positive or negative exponent */
7171 if (*s == '+' || *s == '-')
7174 /* read digits of exponent (no underbars :-) */
7175 while (isDIGIT(*s)) {
7177 Perl_croak(aTHX_ number_too_long);
7182 /* terminate the string */
7185 /* make an sv from the string */
7188 #if defined(Strtol) && defined(Strtoul)
7191 strtol/strtoll sets errno to ERANGE if the number is too big
7192 for an integer. We try to do an integer conversion first
7193 if no characters indicating "float" have been found.
7200 if (*PL_tokenbuf == '-')
7201 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
7203 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
7205 floatit = TRUE; /* Probably just too large. */
7206 else if (*PL_tokenbuf == '-')
7208 else if (uv <= IV_MAX)
7209 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7214 nv = Atof(PL_tokenbuf);
7219 No working strtou?ll?.
7221 Unfortunately atol() doesn't do range checks (returning
7222 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7223 everywhere [1], so we cannot use use atol() (or atoll()).
7224 If we could, they would be used, as Atol(), very much like
7225 Strtol() and Strtoul() are used above.
7227 [1] XXX Configure test needed to check for atol()
7228 (and atoll()) overflow behaviour XXX
7232 We need to do this the hard way. */
7234 nv = Atof(PL_tokenbuf);
7236 /* See if we can make do with an integer value without loss of
7237 precision. We use U_V to cast to a UV, because some
7238 compilers have issues. Then we try casting it back and see
7239 if it was the same [1]. We only do this if we know we
7240 specifically read an integer. If floatit is true, then we
7241 don't need to do the conversion at all.
7243 [1] Note that this is lossy if our NVs cannot preserve our
7244 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7245 and NV_PRESERVES_UV_BITS (a number), but in general we really
7246 do hope all such potentially lossy platforms have strtou?ll?
7247 to do a lossless IV/UV conversion.
7249 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7250 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7251 as NV_DIG and NV_MANT_DIG)?
7257 if (!floatit && (NV)uv == nv) {
7259 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7267 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7268 (PL_hints & HINT_NEW_INTEGER) )
7269 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7270 (floatit ? "float" : "integer"),
7274 /* if it starts with a v, it could be a v-string */
7280 while (isDIGIT(*pos) || *pos == '_')
7282 if (!isALPHA(*pos)) {
7284 U8 tmpbuf[UTF8_MAXLEN+1];
7286 s++; /* get past 'v' */
7289 sv_setpvn(sv, "", 0);
7292 if (*s == '0' && isDIGIT(s[1]))
7293 yyerror("Octal number in vector unsupported");
7296 /* this is atoi() that tolerates underscores */
7299 while (--end >= s) {
7304 rev += (*end - '0') * mult;
7306 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7307 Perl_warner(aTHX_ WARN_OVERFLOW,
7308 "Integer overflow in decimal number");
7311 /* Append native character for the rev point */
7312 tmpend = uvchr_to_utf8(tmpbuf, rev);
7313 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7314 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
7316 if (*pos == '.' && isDIGIT(pos[1]))
7322 while (isDIGIT(*pos) || *pos == '_')
7332 /* make the op for the constant and return */
7335 lvalp->opval = newSVOP(OP_CONST, 0, sv);
7337 lvalp->opval = Nullop;
7343 S_scan_formline(pTHX_ register char *s)
7347 SV *stuff = newSVpvn("",0);
7348 bool needargs = FALSE;
7351 if (*s == '.' || *s == /*{*/'}') {
7353 #ifdef PERL_STRICT_CR
7354 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7356 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7358 if (*t == '\n' || t == PL_bufend)
7361 if (PL_in_eval && !PL_rsfp) {
7362 eol = strchr(s,'\n');
7367 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7369 for (t = s; t < eol; t++) {
7370 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7372 goto enough; /* ~~ must be first line in formline */
7374 if (*t == '@' || *t == '^')
7377 sv_catpvn(stuff, s, eol-s);
7378 #ifndef PERL_STRICT_CR
7379 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7380 char *end = SvPVX(stuff) + SvCUR(stuff);
7389 s = filter_gets(PL_linestr, PL_rsfp, 0);
7390 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7391 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7392 PL_last_lop = PL_last_uni = Nullch;
7395 yyerror("Format not terminated");
7405 PL_lex_state = LEX_NORMAL;
7406 PL_nextval[PL_nexttoke].ival = 0;
7410 PL_lex_state = LEX_FORMLINE;
7411 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7413 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7417 SvREFCNT_dec(stuff);
7418 PL_lex_formbrack = 0;
7429 PL_cshlen = strlen(PL_cshname);
7434 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7436 I32 oldsavestack_ix = PL_savestack_ix;
7437 CV* outsidecv = PL_compcv;
7441 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7443 SAVEI32(PL_subline);
7444 save_item(PL_subname);
7447 SAVESPTR(PL_comppad_name);
7448 SAVESPTR(PL_compcv);
7449 SAVEI32(PL_comppad_name_fill);
7450 SAVEI32(PL_min_intro_pending);
7451 SAVEI32(PL_max_intro_pending);
7452 SAVEI32(PL_pad_reset_pending);
7454 PL_compcv = (CV*)NEWSV(1104,0);
7455 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7456 CvFLAGS(PL_compcv) |= flags;
7458 PL_comppad = newAV();
7459 av_push(PL_comppad, Nullsv);
7460 PL_curpad = AvARRAY(PL_comppad);
7461 PL_comppad_name = newAV();
7462 PL_comppad_name_fill = 0;
7463 PL_min_intro_pending = 0;
7465 PL_subline = CopLINE(PL_curcop);
7467 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7468 PL_curpad[0] = (SV*)newAV();
7469 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7470 #endif /* USE_THREADS */
7472 comppadlist = newAV();
7473 AvREAL_off(comppadlist);
7474 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7475 av_store(comppadlist, 1, (SV*)PL_comppad);
7477 CvPADLIST(PL_compcv) = comppadlist;
7478 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7480 CvOWNER(PL_compcv) = 0;
7481 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7482 MUTEX_INIT(CvMUTEXP(PL_compcv));
7483 #endif /* USE_THREADS */
7485 return oldsavestack_ix;
7489 #pragma segment Perl_yylex
7492 Perl_yywarn(pTHX_ char *s)
7494 PL_in_eval |= EVAL_WARNONLY;
7496 PL_in_eval &= ~EVAL_WARNONLY;
7501 Perl_yyerror(pTHX_ char *s)
7504 char *context = NULL;
7508 if (!yychar || (yychar == ';' && !PL_rsfp))
7510 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7511 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7512 while (isSPACE(*PL_oldoldbufptr))
7514 context = PL_oldoldbufptr;
7515 contlen = PL_bufptr - PL_oldoldbufptr;
7517 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7518 PL_oldbufptr != PL_bufptr) {
7519 while (isSPACE(*PL_oldbufptr))
7521 context = PL_oldbufptr;
7522 contlen = PL_bufptr - PL_oldbufptr;
7524 else if (yychar > 255)
7525 where = "next token ???";
7526 #ifdef USE_PURE_BISON
7527 /* GNU Bison sets the value -2 */
7528 else if (yychar == -2) {
7530 else if ((yychar & 127) == 127) {
7532 if (PL_lex_state == LEX_NORMAL ||
7533 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7534 where = "at end of line";
7535 else if (PL_lex_inpat)
7536 where = "within pattern";
7538 where = "within string";
7541 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7543 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7544 else if (isPRINT_LC(yychar))
7545 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7547 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7548 where = SvPVX(where_sv);
7550 msg = sv_2mortal(newSVpv(s, 0));
7551 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7552 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7554 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7556 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7557 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7558 Perl_sv_catpvf(aTHX_ msg,
7559 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7560 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7563 if (PL_in_eval & EVAL_WARNONLY)
7564 Perl_warn(aTHX_ "%"SVf, msg);
7567 if (PL_error_count >= 10) {
7568 if (PL_in_eval && SvCUR(ERRSV))
7569 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7570 ERRSV, CopFILE(PL_curcop));
7572 Perl_croak(aTHX_ "%s has too many errors.\n",
7573 CopFILE(PL_curcop));
7576 PL_in_my_stash = Nullhv;
7580 #pragma segment Main
7584 S_swallow_bom(pTHX_ U8 *s)
7587 slen = SvCUR(PL_linestr);
7591 /* UTF-16 little-endian */
7592 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7593 Perl_croak(aTHX_ "Unsupported script encoding");
7594 #ifndef PERL_NO_UTF16_FILTER
7595 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7597 if (PL_bufend > (char*)s) {
7601 filter_add(utf16rev_textfilter, NULL);
7602 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7603 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7604 PL_bufend - (char*)s - 1,
7606 Copy(news, s, newlen, U8);
7607 SvCUR_set(PL_linestr, newlen);
7608 PL_bufend = SvPVX(PL_linestr) + newlen;
7609 news[newlen++] = '\0';
7613 Perl_croak(aTHX_ "Unsupported script encoding");
7618 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7619 #ifndef PERL_NO_UTF16_FILTER
7620 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7622 if (PL_bufend > (char *)s) {
7626 filter_add(utf16_textfilter, NULL);
7627 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7628 PL_bufend = (char*)utf16_to_utf8(s, news,
7629 PL_bufend - (char*)s,
7631 Copy(news, s, newlen, U8);
7632 SvCUR_set(PL_linestr, newlen);
7633 PL_bufend = SvPVX(PL_linestr) + newlen;
7634 news[newlen++] = '\0';
7638 Perl_croak(aTHX_ "Unsupported script encoding");
7643 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7644 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7649 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7650 s[2] == 0xFE && s[3] == 0xFF)
7652 Perl_croak(aTHX_ "Unsupported script encoding");
7664 * Restore a source filter.
7668 restore_rsfp(pTHXo_ void *f)
7670 PerlIO *fp = (PerlIO*)f;
7672 if (PL_rsfp == PerlIO_stdin())
7673 PerlIO_clearerr(PL_rsfp);
7674 else if (PL_rsfp && (PL_rsfp != fp))
7675 PerlIO_close(PL_rsfp);
7679 #ifndef PERL_NO_UTF16_FILTER
7681 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7683 I32 count = FILTER_READ(idx+1, sv, maxlen);
7688 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7689 if (!*SvPV_nolen(sv))
7690 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7693 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7694 sv_usepvn(sv, (char*)tmps, tend - tmps);
7700 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7702 I32 count = FILTER_READ(idx+1, sv, maxlen);
7707 if (!*SvPV_nolen(sv))
7708 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7711 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7712 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7713 sv_usepvn(sv, (char*)tmps, tend - tmps);