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
39 /*#define UTF (SvUTF8(PL_linestr) && !(PL_hints & HINT_BYTE))*/
40 #define UTF (PL_hints & HINT_UTF8)
42 /* In variables name $^X, these are the legal values for X.
43 * 1999-02-27 mjd-perl-patch@plover.com */
44 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
46 /* On MacOS, respect nonbreaking spaces */
47 #ifdef MACOS_TRADITIONAL
48 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
50 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
53 /* LEX_* are values for PL_lex_state, the state of the lexer.
54 * They are arranged oddly so that the guard on the switch statement
55 * can get by with a single comparison (if the compiler is smart enough).
58 /* #define LEX_NOTPARSING 11 is done in perl.h. */
61 #define LEX_INTERPNORMAL 9
62 #define LEX_INTERPCASEMOD 8
63 #define LEX_INTERPPUSH 7
64 #define LEX_INTERPSTART 6
65 #define LEX_INTERPEND 5
66 #define LEX_INTERPENDMAYBE 4
67 #define LEX_INTERPCONCAT 3
68 #define LEX_INTERPCONST 2
69 #define LEX_FORMLINE 1
70 #define LEX_KNOWNEXT 0
78 # define YYMAXLEVEL 100
80 YYSTYPE* yylval_pointer[YYMAXLEVEL];
81 int* yychar_pointer[YYMAXLEVEL];
85 # define yylval (*yylval_pointer[yyactlevel])
86 # define yychar (*yychar_pointer[yyactlevel])
87 # define PERL_YYLEX_PARAM yylval_pointer[yyactlevel],yychar_pointer[yyactlevel]
89 # define yylex() Perl_yylex_r(aTHX_ yylval_pointer[yyactlevel],yychar_pointer[yyactlevel])
94 /* CLINE is a macro that ensures PL_copline has a sane value */
99 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
102 * Convenience functions to return different tokens and prime the
103 * lexer for the next token. They all take an argument.
105 * TOKEN : generic token (used for '(', DOLSHARP, etc)
106 * OPERATOR : generic operator
107 * AOPERATOR : assignment operator
108 * PREBLOCK : beginning the block after an if, while, foreach, ...
109 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
110 * PREREF : *EXPR where EXPR is not a simple identifier
111 * TERM : expression term
112 * LOOPX : loop exiting command (goto, last, dump, etc)
113 * FTST : file test operator
114 * FUN0 : zero-argument function
115 * FUN1 : not used, except for not, which isn't a UNIOP
116 * BOop : bitwise or or xor
118 * SHop : shift operator
119 * PWop : power operator
120 * PMop : pattern-matching operator
121 * Aop : addition-level operator
122 * Mop : multiplication-level operator
123 * Eop : equality-testing operator
124 * Rop : relational operator <= != gt
126 * Also see LOP and lop() below.
129 /* Note that REPORT() and REPORT2() will be expressions that supply
130 * their own trailing comma, not suitable for statements as such. */
131 #ifdef DEBUGGING /* Serve -DT. */
132 # define REPORT(x,retval) tokereport(x,s,(int)retval),
133 # define REPORT2(x,retval) tokereport(x,s, yylval.ival),
135 # define REPORT(x,retval)
136 # define REPORT2(x,retval)
139 #define TOKEN(retval) return (REPORT2("token",retval) PL_bufptr = s,(int)retval)
140 #define OPERATOR(retval) return (REPORT2("operator",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval)
141 #define AOPERATOR(retval) return ao((REPORT2("aop",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval))
142 #define PREBLOCK(retval) return (REPORT2("preblock",retval) PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
143 #define PRETERMBLOCK(retval) return (REPORT2("pretermblock",retval) PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
144 #define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
145 #define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
146 #define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
147 #define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
148 #define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
149 #define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
150 #define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
151 #define BAop(f) return ao((yylval.ival=f, REPORT("bitandop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
152 #define SHop(f) return ao((yylval.ival=f, REPORT("shiftop",f) PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
153 #define PWop(f) return ao((yylval.ival=f, REPORT("powop",f) PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
154 #define PMop(f) return(yylval.ival=f, REPORT("matchop",f) PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
155 #define Aop(f) return ao((yylval.ival=f, REPORT("add",f) PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
156 #define Mop(f) return ao((yylval.ival=f, REPORT("mul",f) PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
157 #define Eop(f) return(yylval.ival=f, REPORT("eq",f) PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
158 #define Rop(f) return(yylval.ival=f, REPORT("rel",f) PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
160 /* This bit of chicanery makes a unary function followed by
161 * a parenthesis into a function with one argument, highest precedence.
163 #define UNI(f) return(yylval.ival = f, \
167 PL_last_uni = PL_oldbufptr, \
168 PL_last_lop_op = f, \
169 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
171 #define UNIBRACK(f) return(yylval.ival = f, \
174 PL_last_uni = PL_oldbufptr, \
175 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
177 /* grandfather return to old style */
178 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
181 S_tokereport(pTHX_ char *thing, char* s, I32 rv)
185 report = newSVpv(thing, 0);
186 Perl_sv_catpvf(aTHX_ report, ":line %i:%i:", CopLINE(PL_curcop), rv);
188 if (s - PL_bufptr > 0)
189 sv_catpvn(report, PL_bufptr, s - PL_bufptr);
191 if (PL_oldbufptr && *PL_oldbufptr)
192 sv_catpv(report, PL_tokenbuf);
194 PerlIO_printf(Perl_debug_log, "### %s\n", SvPV_nolen(report));
201 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
202 * into an OP_ANDASSIGN or OP_ORASSIGN
206 S_ao(pTHX_ int toketype)
208 if (*PL_bufptr == '=') {
210 if (toketype == ANDAND)
211 yylval.ival = OP_ANDASSIGN;
212 else if (toketype == OROR)
213 yylval.ival = OP_ORASSIGN;
221 * When Perl expects an operator and finds something else, no_op
222 * prints the warning. It always prints "<something> found where
223 * operator expected. It prints "Missing semicolon on previous line?"
224 * if the surprise occurs at the start of the line. "do you need to
225 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
226 * where the compiler doesn't know if foo is a method call or a function.
227 * It prints "Missing operator before end of line" if there's nothing
228 * after the missing operator, or "... before <...>" if there is something
229 * after the missing operator.
233 S_no_op(pTHX_ char *what, char *s)
235 char *oldbp = PL_bufptr;
236 bool is_first = (PL_oldbufptr == PL_linestart);
242 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
244 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
245 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
247 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
248 if (t < PL_bufptr && isSPACE(*t))
249 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
250 t - PL_oldoldbufptr, PL_oldoldbufptr);
254 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
261 * Complain about missing quote/regexp/heredoc terminator.
262 * If it's called with (char *)NULL then it cauterizes the line buffer.
263 * If we're in a delimited string and the delimiter is a control
264 * character, it's reformatted into a two-char sequence like ^C.
269 S_missingterm(pTHX_ char *s)
274 char *nl = strrchr(s,'\n');
280 iscntrl(PL_multi_close)
282 PL_multi_close < 32 || PL_multi_close == 127
286 tmpbuf[1] = toCTRL(PL_multi_close);
292 *tmpbuf = PL_multi_close;
296 q = strchr(s,'"') ? '\'' : '"';
297 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
305 Perl_deprecate(pTHX_ char *s)
307 if (ckWARN(WARN_DEPRECATED))
308 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
313 * Deprecate a comma-less variable list.
319 deprecate("comma-less variable list");
323 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
324 * utf16-to-utf8-reversed.
327 #ifdef PERL_CR_FILTER
331 register char *s = SvPVX(sv);
332 register char *e = s + SvCUR(sv);
333 /* outer loop optimized to do nothing if there are no CR-LFs */
335 if (*s++ == '\r' && *s == '\n') {
336 /* hit a CR-LF, need to copy the rest */
337 register char *d = s - 1;
340 if (*s == '\r' && s[1] == '\n')
351 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
353 I32 count = FILTER_READ(idx+1, sv, maxlen);
354 if (count > 0 && !maxlen)
362 * Initialize variables. Uses the Perl save_stack to save its state (for
363 * recursive calls to the parser).
367 Perl_lex_start(pTHX_ SV *line)
372 SAVEI32(PL_lex_dojoin);
373 SAVEI32(PL_lex_brackets);
374 SAVEI32(PL_lex_casemods);
375 SAVEI32(PL_lex_starts);
376 SAVEI32(PL_lex_state);
377 SAVEVPTR(PL_lex_inpat);
378 SAVEI32(PL_lex_inwhat);
379 if (PL_lex_state == LEX_KNOWNEXT) {
380 I32 toke = PL_nexttoke;
381 while (--toke >= 0) {
382 SAVEI32(PL_nexttype[toke]);
383 SAVEVPTR(PL_nextval[toke]);
385 SAVEI32(PL_nexttoke);
387 SAVECOPLINE(PL_curcop);
390 SAVEPPTR(PL_oldbufptr);
391 SAVEPPTR(PL_oldoldbufptr);
392 SAVEPPTR(PL_last_lop);
393 SAVEPPTR(PL_last_uni);
394 SAVEPPTR(PL_linestart);
395 SAVESPTR(PL_linestr);
396 SAVEPPTR(PL_lex_brackstack);
397 SAVEPPTR(PL_lex_casestack);
398 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
399 SAVESPTR(PL_lex_stuff);
400 SAVEI32(PL_lex_defer);
401 SAVEI32(PL_sublex_info.sub_inwhat);
402 SAVESPTR(PL_lex_repl);
404 SAVEINT(PL_lex_expect);
406 PL_lex_state = LEX_NORMAL;
410 New(899, PL_lex_brackstack, 120, char);
411 New(899, PL_lex_casestack, 12, char);
412 SAVEFREEPV(PL_lex_brackstack);
413 SAVEFREEPV(PL_lex_casestack);
415 *PL_lex_casestack = '\0';
418 PL_lex_stuff = Nullsv;
419 PL_lex_repl = Nullsv;
423 PL_sublex_info.sub_inwhat = 0;
425 if (SvREADONLY(PL_linestr))
426 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
427 s = SvPV(PL_linestr, len);
428 if (len && s[len-1] != ';') {
429 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
430 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
431 sv_catpvn(PL_linestr, "\n;", 2);
433 SvTEMP_off(PL_linestr);
434 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
435 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
436 PL_last_lop = PL_last_uni = Nullch;
438 PL_rs = newSVpvn("\n", 1);
444 * Finalizer for lexing operations. Must be called when the parser is
445 * done with the lexer.
451 PL_doextract = FALSE;
456 * This subroutine has nothing to do with tilting, whether at windmills
457 * or pinball tables. Its name is short for "increment line". It
458 * increments the current line number in CopLINE(PL_curcop) and checks
459 * to see whether the line starts with a comment of the form
460 * # line 500 "foo.pm"
461 * If so, it sets the current line number and file to the values in the comment.
465 S_incline(pTHX_ char *s)
472 CopLINE_inc(PL_curcop);
475 while (SPACE_OR_TAB(*s)) s++;
476 if (strnEQ(s, "line", 4))
480 if (SPACE_OR_TAB(*s))
484 while (SPACE_OR_TAB(*s)) s++;
490 while (SPACE_OR_TAB(*s))
492 if (*s == '"' && (t = strchr(s+1, '"'))) {
497 for (t = s; !isSPACE(*t); t++) ;
500 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
502 if (*e != '\n' && *e != '\0')
503 return; /* false alarm */
509 Safefree(CopFILE(PL_curcop));
511 SvREFCNT_dec(CopFILEGV(PL_curcop));
513 CopFILE_set(PL_curcop, s);
516 CopLINE_set(PL_curcop, atoi(n)-1);
521 * Called to gobble the appropriate amount and type of whitespace.
522 * Skips comments as well.
526 S_skipspace(pTHX_ register char *s)
528 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
529 while (s < PL_bufend && SPACE_OR_TAB(*s))
535 SSize_t oldprevlen, oldoldprevlen;
536 SSize_t oldloplen, oldunilen;
537 while (s < PL_bufend && isSPACE(*s)) {
538 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
543 if (s < PL_bufend && *s == '#') {
544 while (s < PL_bufend && *s != '\n')
548 if (PL_in_eval && !PL_rsfp) {
555 /* only continue to recharge the buffer if we're at the end
556 * of the buffer, we're not reading from a source filter, and
557 * we're in normal lexing mode
559 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
560 PL_lex_state == LEX_FORMLINE)
563 /* try to recharge the buffer */
564 if ((s = filter_gets(PL_linestr, PL_rsfp,
565 (prevlen = SvCUR(PL_linestr)))) == Nullch)
567 /* end of file. Add on the -p or -n magic */
568 if (PL_minus_n || PL_minus_p) {
569 sv_setpv(PL_linestr,PL_minus_p ?
570 ";}continue{print or die qq(-p destination: $!\\n)" :
572 sv_catpv(PL_linestr,";}");
573 PL_minus_n = PL_minus_p = 0;
576 sv_setpv(PL_linestr,";");
578 /* reset variables for next time we lex */
579 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
581 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
582 PL_last_lop = PL_last_uni = Nullch;
584 /* Close the filehandle. Could be from -P preprocessor,
585 * STDIN, or a regular file. If we were reading code from
586 * STDIN (because the commandline held no -e or filename)
587 * then we don't close it, we reset it so the code can
588 * read from STDIN too.
591 if (PL_preprocess && !PL_in_eval)
592 (void)PerlProc_pclose(PL_rsfp);
593 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
594 PerlIO_clearerr(PL_rsfp);
596 (void)PerlIO_close(PL_rsfp);
601 /* not at end of file, so we only read another line */
602 /* make corresponding updates to old pointers, for yyerror() */
603 oldprevlen = PL_oldbufptr - PL_bufend;
604 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
606 oldunilen = PL_last_uni - PL_bufend;
608 oldloplen = PL_last_lop - PL_bufend;
609 PL_linestart = PL_bufptr = s + prevlen;
610 PL_bufend = s + SvCUR(PL_linestr);
612 PL_oldbufptr = s + oldprevlen;
613 PL_oldoldbufptr = s + oldoldprevlen;
615 PL_last_uni = s + oldunilen;
617 PL_last_lop = s + oldloplen;
620 /* debugger active and we're not compiling the debugger code,
621 * so store the line into the debugger's array of lines
623 if (PERLDB_LINE && PL_curstash != PL_debstash) {
624 SV *sv = NEWSV(85,0);
626 sv_upgrade(sv, SVt_PVMG);
627 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
628 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
635 * Check the unary operators to ensure there's no ambiguity in how they're
636 * used. An ambiguous piece of code would be:
638 * This doesn't mean rand() + 5. Because rand() is a unary operator,
639 * the +5 is its argument.
648 if (PL_oldoldbufptr != PL_last_uni)
650 while (isSPACE(*PL_last_uni))
652 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
653 if ((t = strchr(s, '(')) && t < PL_bufptr)
655 if (ckWARN_d(WARN_AMBIGUOUS)){
658 Perl_warner(aTHX_ WARN_AMBIGUOUS,
659 "Warning: Use of \"%s\" without parens is ambiguous",
665 /* workaround to replace the UNI() macro with a function. Only the
666 * hints/uts.sh file mentions this. Other comments elsewhere in the
667 * source indicate Microport Unix might need it too.
673 #define UNI(f) return uni(f,s)
676 S_uni(pTHX_ I32 f, char *s)
681 PL_last_uni = PL_oldbufptr;
692 #endif /* CRIPPLED_CC */
695 * LOP : macro to build a list operator. Its behaviour has been replaced
696 * with a subroutine, S_lop() for which LOP is just another name.
699 #define LOP(f,x) return lop(f,x,s)
703 * Build a list operator (or something that might be one). The rules:
704 * - if we have a next token, then it's a list operator [why?]
705 * - if the next thing is an opening paren, then it's a function
706 * - else it's a list operator
710 S_lop(pTHX_ I32 f, int x, char *s)
717 PL_last_lop = PL_oldbufptr;
732 * When the lexer realizes it knows the next token (for instance,
733 * it is reordering tokens for the parser) then it can call S_force_next
734 * to know what token to return the next time the lexer is called. Caller
735 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
736 * handles the token correctly.
740 S_force_next(pTHX_ I32 type)
742 PL_nexttype[PL_nexttoke] = type;
744 if (PL_lex_state != LEX_KNOWNEXT) {
745 PL_lex_defer = PL_lex_state;
746 PL_lex_expect = PL_expect;
747 PL_lex_state = LEX_KNOWNEXT;
753 * When the lexer knows the next thing is a word (for instance, it has
754 * just seen -> and it knows that the next char is a word char, then
755 * it calls S_force_word to stick the next word into the PL_next lookahead.
758 * char *start : buffer position (must be within PL_linestr)
759 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
760 * int check_keyword : if true, Perl checks to make sure the word isn't
761 * a keyword (do this if the word is a label, e.g. goto FOO)
762 * int allow_pack : if true, : characters will also be allowed (require,
764 * int allow_initial_tick : used by the "sub" lexer only.
768 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
773 start = skipspace(start);
775 if (isIDFIRST_lazy_if(s,UTF) ||
776 (allow_pack && *s == ':') ||
777 (allow_initial_tick && *s == '\'') )
779 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
780 if (check_keyword && keyword(PL_tokenbuf, len))
782 if (token == METHOD) {
787 PL_expect = XOPERATOR;
790 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
791 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
799 * Called when the lexer wants $foo *foo &foo etc, but the program
800 * text only contains the "foo" portion. The first argument is a pointer
801 * to the "foo", and the second argument is the type symbol to prefix.
802 * Forces the next token to be a "WORD".
803 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
807 S_force_ident(pTHX_ register char *s, int kind)
810 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
811 PL_nextval[PL_nexttoke].opval = o;
814 o->op_private = OPpCONST_ENTERED;
815 /* XXX see note in pp_entereval() for why we forgo typo
816 warnings if the symbol must be introduced in an eval.
818 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
819 kind == '$' ? SVt_PV :
820 kind == '@' ? SVt_PVAV :
821 kind == '%' ? SVt_PVHV :
829 Perl_str_to_version(pTHX_ SV *sv)
834 char *start = SvPVx(sv,len);
835 bool utf = SvUTF8(sv) ? TRUE : FALSE;
836 char *end = start + len;
837 while (start < end) {
841 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
846 retval += ((NV)n)/nshift;
855 * Forces the next token to be a version number.
859 S_force_version(pTHX_ char *s)
861 OP *version = Nullop;
870 for (; isDIGIT(*d) || *d == '_' || *d == '.'; d++);
871 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
873 s = scan_num(s, &yylval);
874 version = yylval.opval;
875 ver = cSVOPx(version)->op_sv;
876 if (SvPOK(ver) && !SvNIOK(ver)) {
877 (void)SvUPGRADE(ver, SVt_PVNV);
878 SvNVX(ver) = str_to_version(ver);
879 SvNOK_on(ver); /* hint that it is a version */
884 /* NOTE: The parser sees the package name and the VERSION swapped */
885 PL_nextval[PL_nexttoke].opval = version;
893 * Tokenize a quoted string passed in as an SV. It finds the next
894 * chunk, up to end of string or a backslash. It may make a new
895 * SV containing that chunk (if HINT_NEW_STRING is on). It also
900 S_tokeq(pTHX_ SV *sv)
911 s = SvPV_force(sv, len);
912 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
915 while (s < send && *s != '\\')
920 if ( PL_hints & HINT_NEW_STRING )
921 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
924 if (s + 1 < send && (s[1] == '\\'))
925 s++; /* all that, just for this */
930 SvCUR_set(sv, d - SvPVX(sv));
932 if ( PL_hints & HINT_NEW_STRING )
933 return new_constant(NULL, 0, "q", sv, pv, "q");
938 * Now come three functions related to double-quote context,
939 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
940 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
941 * interact with PL_lex_state, and create fake ( ... ) argument lists
942 * to handle functions and concatenation.
943 * They assume that whoever calls them will be setting up a fake
944 * join call, because each subthing puts a ',' after it. This lets
947 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
949 * (I'm not sure whether the spurious commas at the end of lcfirst's
950 * arguments and join's arguments are created or not).
955 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
957 * Pattern matching will set PL_lex_op to the pattern-matching op to
958 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
960 * OP_CONST and OP_READLINE are easy--just make the new op and return.
962 * Everything else becomes a FUNC.
964 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
965 * had an OP_CONST or OP_READLINE). This just sets us up for a
966 * call to S_sublex_push().
972 register I32 op_type = yylval.ival;
974 if (op_type == OP_NULL) {
975 yylval.opval = PL_lex_op;
979 if (op_type == OP_CONST || op_type == OP_READLINE) {
980 SV *sv = tokeq(PL_lex_stuff);
982 if (SvTYPE(sv) == SVt_PVIV) {
983 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
989 nsv = newSVpvn(p, len);
995 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
996 PL_lex_stuff = Nullsv;
1000 PL_sublex_info.super_state = PL_lex_state;
1001 PL_sublex_info.sub_inwhat = op_type;
1002 PL_sublex_info.sub_op = PL_lex_op;
1003 PL_lex_state = LEX_INTERPPUSH;
1007 yylval.opval = PL_lex_op;
1017 * Create a new scope to save the lexing state. The scope will be
1018 * ended in S_sublex_done. Returns a '(', starting the function arguments
1019 * to the uc, lc, etc. found before.
1020 * Sets PL_lex_state to LEX_INTERPCONCAT.
1028 PL_lex_state = PL_sublex_info.super_state;
1029 SAVEI32(PL_lex_dojoin);
1030 SAVEI32(PL_lex_brackets);
1031 SAVEI32(PL_lex_casemods);
1032 SAVEI32(PL_lex_starts);
1033 SAVEI32(PL_lex_state);
1034 SAVEVPTR(PL_lex_inpat);
1035 SAVEI32(PL_lex_inwhat);
1036 SAVECOPLINE(PL_curcop);
1037 SAVEPPTR(PL_bufptr);
1038 SAVEPPTR(PL_oldbufptr);
1039 SAVEPPTR(PL_oldoldbufptr);
1040 SAVEPPTR(PL_last_lop);
1041 SAVEPPTR(PL_last_uni);
1042 SAVEPPTR(PL_linestart);
1043 SAVESPTR(PL_linestr);
1044 SAVEPPTR(PL_lex_brackstack);
1045 SAVEPPTR(PL_lex_casestack);
1047 PL_linestr = PL_lex_stuff;
1048 PL_lex_stuff = Nullsv;
1050 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1051 = SvPVX(PL_linestr);
1052 PL_bufend += SvCUR(PL_linestr);
1053 PL_last_lop = PL_last_uni = Nullch;
1054 SAVEFREESV(PL_linestr);
1056 PL_lex_dojoin = FALSE;
1057 PL_lex_brackets = 0;
1058 New(899, PL_lex_brackstack, 120, char);
1059 New(899, PL_lex_casestack, 12, char);
1060 SAVEFREEPV(PL_lex_brackstack);
1061 SAVEFREEPV(PL_lex_casestack);
1062 PL_lex_casemods = 0;
1063 *PL_lex_casestack = '\0';
1065 PL_lex_state = LEX_INTERPCONCAT;
1066 CopLINE_set(PL_curcop, PL_multi_start);
1068 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1069 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1070 PL_lex_inpat = PL_sublex_info.sub_op;
1072 PL_lex_inpat = Nullop;
1079 * Restores lexer state after a S_sublex_push.
1085 if (!PL_lex_starts++) {
1086 SV *sv = newSVpvn("",0);
1087 if (SvUTF8(PL_linestr))
1089 PL_expect = XOPERATOR;
1090 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1094 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1095 PL_lex_state = LEX_INTERPCASEMOD;
1099 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1100 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1101 PL_linestr = PL_lex_repl;
1103 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1104 PL_bufend += SvCUR(PL_linestr);
1105 PL_last_lop = PL_last_uni = Nullch;
1106 SAVEFREESV(PL_linestr);
1107 PL_lex_dojoin = FALSE;
1108 PL_lex_brackets = 0;
1109 PL_lex_casemods = 0;
1110 *PL_lex_casestack = '\0';
1112 if (SvEVALED(PL_lex_repl)) {
1113 PL_lex_state = LEX_INTERPNORMAL;
1115 /* we don't clear PL_lex_repl here, so that we can check later
1116 whether this is an evalled subst; that means we rely on the
1117 logic to ensure sublex_done() is called again only via the
1118 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1121 PL_lex_state = LEX_INTERPCONCAT;
1122 PL_lex_repl = Nullsv;
1128 PL_bufend = SvPVX(PL_linestr);
1129 PL_bufend += SvCUR(PL_linestr);
1130 PL_expect = XOPERATOR;
1131 PL_sublex_info.sub_inwhat = 0;
1139 Extracts a pattern, double-quoted string, or transliteration. This
1142 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1143 processing a pattern (PL_lex_inpat is true), a transliteration
1144 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1146 Returns a pointer to the character scanned up to. Iff this is
1147 advanced from the start pointer supplied (ie if anything was
1148 successfully parsed), will leave an OP for the substring scanned
1149 in yylval. Caller must intuit reason for not parsing further
1150 by looking at the next characters herself.
1154 double-quoted style: \r and \n
1155 regexp special ones: \D \s
1157 backrefs: \1 (deprecated in substitution replacements)
1158 case and quoting: \U \Q \E
1159 stops on @ and $, but not for $ as tail anchor
1161 In transliterations:
1162 characters are VERY literal, except for - not at the start or end
1163 of the string, which indicates a range. scan_const expands the
1164 range to the full set of intermediate characters.
1166 In double-quoted strings:
1168 double-quoted style: \r and \n
1170 backrefs: \1 (deprecated)
1171 case and quoting: \U \Q \E
1174 scan_const does *not* construct ops to handle interpolated strings.
1175 It stops processing as soon as it finds an embedded $ or @ variable
1176 and leaves it to the caller to work out what's going on.
1178 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1180 $ in pattern could be $foo or could be tail anchor. Assumption:
1181 it's a tail anchor if $ is the last thing in the string, or if it's
1182 followed by one of ")| \n\t"
1184 \1 (backreferences) are turned into $1
1186 The structure of the code is
1187 while (there's a character to process) {
1188 handle transliteration ranges
1189 skip regexp comments
1190 skip # initiated comments in //x patterns
1191 check for embedded @foo
1192 check for embedded scalars
1194 leave intact backslashes from leave (below)
1195 deprecate \1 in strings and sub replacements
1196 handle string-changing backslashes \l \U \Q \E, etc.
1197 switch (what was escaped) {
1198 handle - in a transliteration (becomes a literal -)
1199 handle \132 octal characters
1200 handle 0x15 hex characters
1201 handle \cV (control V)
1202 handle printf backslashes (\f, \r, \n, etc)
1204 } (end if backslash)
1205 } (end while character to read)
1210 S_scan_const(pTHX_ char *start)
1212 register char *send = PL_bufend; /* end of the constant */
1213 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1214 register char *s = start; /* start of the constant */
1215 register char *d = SvPVX(sv); /* destination for copies */
1216 bool dorange = FALSE; /* are we in a translit range? */
1217 bool didrange = FALSE; /* did we just finish a range? */
1218 bool has_utf8 = (PL_linestr && SvUTF8(PL_linestr));
1219 /* the constant is UTF8 */
1222 I32 utf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1223 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1225 I32 this_utf8 = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1226 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ?
1227 OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
1229 const char *leaveit = /* set of acceptably-backslashed characters */
1231 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1234 while (s < send || dorange) {
1235 /* get transliterations out of the way (they're most literal) */
1236 if (PL_lex_inwhat == OP_TRANS) {
1237 /* expand a range A-Z to the full set of characters. AIE! */
1239 I32 i; /* current expanded character */
1240 I32 min; /* first character in range */
1241 I32 max; /* last character in range */
1244 char *c = (char*)utf8_hop((U8*)d, -1);
1249 /* mark the range as done, and continue */
1254 i = d - SvPVX(sv); /* remember current offset */
1255 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1256 d = SvPVX(sv) + i; /* refresh d after realloc */
1257 d -= 2; /* eat the first char and the - */
1259 min = (U8)*d; /* first char in range */
1260 max = (U8)d[1]; /* last char in range */
1264 "Invalid [] range \"%c-%c\" in transliteration operator",
1265 (char)min, (char)max);
1269 if ((isLOWER(min) && isLOWER(max)) ||
1270 (isUPPER(min) && isUPPER(max))) {
1272 for (i = min; i <= max; i++)
1276 for (i = min; i <= max; i++)
1283 for (i = min; i <= max; i++)
1286 /* mark the range as done, and continue */
1292 /* range begins (ignore - as first or last char) */
1293 else if (*s == '-' && s+1 < send && s != start) {
1295 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
1298 *d++ = (char)0xff; /* use illegal utf8 byte--see pmtrans */
1310 /* if we get here, we're not doing a transliteration */
1312 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1313 except for the last char, which will be done separately. */
1314 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1316 while (s < send && *s != ')')
1319 else if (s[2] == '{' /* This should match regcomp.c */
1320 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1323 char *regparse = s + (s[2] == '{' ? 3 : 4);
1326 while (count && (c = *regparse)) {
1327 if (c == '\\' && regparse[1])
1335 if (*regparse != ')') {
1336 regparse--; /* Leave one char for continuation. */
1337 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1339 while (s < regparse)
1344 /* likewise skip #-initiated comments in //x patterns */
1345 else if (*s == '#' && PL_lex_inpat &&
1346 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1347 while (s+1 < send && *s != '\n')
1351 /* check for embedded arrays
1352 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1354 else if (*s == '@' && s[1]
1355 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
1358 /* check for embedded scalars. only stop if we're sure it's a
1361 else if (*s == '$') {
1362 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1364 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1365 break; /* in regexp, $ might be tail anchor */
1369 if (*s == '\\' && s+1 < send) {
1372 /* some backslashes we leave behind */
1373 if (*leaveit && *s && strchr(leaveit, *s)) {
1379 /* deprecate \1 in strings and substitution replacements */
1380 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1381 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1383 if (ckWARN(WARN_SYNTAX))
1384 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1389 /* string-change backslash escapes */
1390 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1395 /* if we get here, it's either a quoted -, or a digit */
1398 /* quoted - in transliterations */
1400 if (PL_lex_inwhat == OP_TRANS) {
1407 if (ckWARN(WARN_MISC) && isALNUM(*s))
1408 Perl_warner(aTHX_ WARN_MISC,
1409 "Unrecognized escape \\%c passed through",
1411 /* default action is to copy the quoted character */
1412 goto default_action;
1415 /* \132 indicates an octal constant */
1416 case '0': case '1': case '2': case '3':
1417 case '4': case '5': case '6': case '7':
1419 STRLEN len = 0; /* disallow underscores */
1420 uv = (UV)scan_oct(s, 3, &len);
1423 goto NUM_ESCAPE_INSERT;
1425 /* \x24 indicates a hex constant */
1429 char* e = strchr(s, '}');
1431 yyerror("Missing right brace on \\x{}");
1435 STRLEN len = 1; /* allow underscores */
1436 uv = (UV)scan_hex(s + 1, e - s - 1, &len);
1442 STRLEN len = 0; /* disallow underscores */
1443 uv = (UV)scan_hex(s, 2, &len);
1449 /* Insert oct or hex escaped character.
1450 * There will always enough room in sv since such
1451 * escapes will be longer than any UT-F8 sequence
1452 * they can end up as. */
1454 /* We need to map to chars to ASCII before doing the tests
1457 if (NATIVE_TO_ASCII(uv) > 127) {
1458 if (!has_utf8 && uv > 255) {
1459 /* Might need to recode whatever we have
1460 * accumulated so far if it contains any
1463 * (Can't we keep track of that and avoid
1464 * this rescan? --jhi)
1469 for (c = SvPVX(sv); c < d; c++) {
1470 if (UTF8_IS_CONTINUED(NATIVE_TO_ASCII(*c)))
1474 char *old_pvx = SvPVX(sv);
1478 SvLEN(sv) + hicount + 1) +
1486 U8 ch = NATIVE_TO_ASCII(*src);
1487 if (UTF8_IS_CONTINUED(ch)) {
1488 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1489 *dst-- = UTF8_EIGHT_BIT_HI(ch);
1499 if (has_utf8 || uv > 255) {
1500 d = (char*)uvchr_to_utf8((U8*)d, uv);
1502 if (PL_lex_inwhat == OP_TRANS &&
1503 PL_sublex_info.sub_op) {
1504 PL_sublex_info.sub_op->op_private |=
1505 (PL_lex_repl ? OPpTRANS_FROM_UTF
1519 /* \N{latin small letter a} is a named character */
1523 char* e = strchr(s, '}');
1529 yyerror("Missing right brace on \\N{}");
1533 res = newSVpvn(s + 1, e - s - 1);
1534 res = new_constant( Nullch, 0, "charnames",
1535 res, Nullsv, "\\N{...}" );
1537 sv_utf8_upgrade(res);
1538 str = SvPV(res,len);
1539 if (!has_utf8 && SvUTF8(res)) {
1540 char *ostart = SvPVX(sv);
1541 SvCUR_set(sv, d - ostart);
1544 sv_utf8_upgrade(sv);
1545 /* this just broke our allocation above... */
1546 SvGROW(sv, send - start);
1547 d = SvPVX(sv) + SvCUR(sv);
1550 if (len > e - s + 4) {
1551 char *odest = SvPVX(sv);
1553 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
1554 d = SvPVX(sv) + (d - odest);
1556 Copy(str, d, len, char);
1563 yyerror("Missing braces on \\N{}");
1566 /* \c is a control character */
1579 /* printf-style backslashes, formfeeds, newlines, etc */
1596 *d++ = ASCII_TO_NATIVE('\033');
1599 *d++ = ASCII_TO_NATIVE('\007');
1605 } /* end if (backslash) */
1608 if (UTF8_IS_CONTINUED(NATIVE_TO_ASCII(*s)) && (this_utf8 || has_utf8)) {
1609 STRLEN len = (STRLEN) -1;
1612 uv = utf8n_to_uvchr((U8*)s, send - s, &len, 0);
1614 if (len == (STRLEN)-1) {
1615 /* Illegal UTF8 (a high-bit byte), make it valid. */
1616 char *old_pvx = SvPVX(sv);
1617 /* need space for one extra char (NOTE: SvCUR() not set here) */
1618 d = SvGROW(sv, SvLEN(sv) + 1) + (d - old_pvx);
1619 d = (char*)uvchr_to_utf8((U8*)d, (U8)*s++);
1626 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1627 PL_sublex_info.sub_op->op_private |=
1628 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1635 } /* while loop to process each character */
1637 /* terminate the string and set up the sv */
1639 SvCUR_set(sv, d - SvPVX(sv));
1644 /* shrink the sv if we allocated more than we used */
1645 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1646 SvLEN_set(sv, SvCUR(sv) + 1);
1647 Renew(SvPVX(sv), SvLEN(sv), char);
1650 /* return the substring (via yylval) only if we parsed anything */
1651 if (s > PL_bufptr) {
1652 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1653 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1655 ( PL_lex_inwhat == OP_TRANS
1657 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1660 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1667 * Returns TRUE if there's more to the expression (e.g., a subscript),
1670 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1672 * ->[ and ->{ return TRUE
1673 * { and [ outside a pattern are always subscripts, so return TRUE
1674 * if we're outside a pattern and it's not { or [, then return FALSE
1675 * if we're in a pattern and the first char is a {
1676 * {4,5} (any digits around the comma) returns FALSE
1677 * if we're in a pattern and the first char is a [
1679 * [SOMETHING] has a funky algorithm to decide whether it's a
1680 * character class or not. It has to deal with things like
1681 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1682 * anything else returns TRUE
1685 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1688 S_intuit_more(pTHX_ register char *s)
1690 if (PL_lex_brackets)
1692 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1694 if (*s != '{' && *s != '[')
1699 /* In a pattern, so maybe we have {n,m}. */
1716 /* On the other hand, maybe we have a character class */
1719 if (*s == ']' || *s == '^')
1722 /* this is terrifying, and it works */
1723 int weight = 2; /* let's weigh the evidence */
1725 unsigned char un_char = 255, last_un_char;
1726 char *send = strchr(s,']');
1727 char tmpbuf[sizeof PL_tokenbuf * 4];
1729 if (!send) /* has to be an expression */
1732 Zero(seen,256,char);
1735 else if (isDIGIT(*s)) {
1737 if (isDIGIT(s[1]) && s[2] == ']')
1743 for (; s < send; s++) {
1744 last_un_char = un_char;
1745 un_char = (unsigned char)*s;
1750 weight -= seen[un_char] * 10;
1751 if (isALNUM_lazy_if(s+1,UTF)) {
1752 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1753 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1758 else if (*s == '$' && s[1] &&
1759 strchr("[#!%*<>()-=",s[1])) {
1760 if (/*{*/ strchr("])} =",s[2]))
1769 if (strchr("wds]",s[1]))
1771 else if (seen['\''] || seen['"'])
1773 else if (strchr("rnftbxcav",s[1]))
1775 else if (isDIGIT(s[1])) {
1777 while (s[1] && isDIGIT(s[1]))
1787 if (strchr("aA01! ",last_un_char))
1789 if (strchr("zZ79~",s[1]))
1791 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1792 weight -= 5; /* cope with negative subscript */
1795 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1796 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1801 if (keyword(tmpbuf, d - tmpbuf))
1804 if (un_char == last_un_char + 1)
1806 weight -= seen[un_char];
1811 if (weight >= 0) /* probably a character class */
1821 * Does all the checking to disambiguate
1823 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1824 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1826 * First argument is the stuff after the first token, e.g. "bar".
1828 * Not a method if bar is a filehandle.
1829 * Not a method if foo is a subroutine prototyped to take a filehandle.
1830 * Not a method if it's really "Foo $bar"
1831 * Method if it's "foo $bar"
1832 * Not a method if it's really "print foo $bar"
1833 * Method if it's really "foo package::" (interpreted as package->foo)
1834 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1835 * Not a method if bar is a filehandle or package, but is quoted with
1840 S_intuit_method(pTHX_ char *start, GV *gv)
1842 char *s = start + (*start == '$');
1843 char tmpbuf[sizeof PL_tokenbuf];
1851 if ((cv = GvCVu(gv))) {
1852 char *proto = SvPVX(cv);
1862 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1863 /* start is the beginning of the possible filehandle/object,
1864 * and s is the end of it
1865 * tmpbuf is a copy of it
1868 if (*start == '$') {
1869 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1874 return *s == '(' ? FUNCMETH : METHOD;
1876 if (!keyword(tmpbuf, len)) {
1877 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1882 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1883 if (indirgv && GvCVu(indirgv))
1885 /* filehandle or package name makes it a method */
1886 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1888 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1889 return 0; /* no assumptions -- "=>" quotes bearword */
1891 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1892 newSVpvn(tmpbuf,len));
1893 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1897 return *s == '(' ? FUNCMETH : METHOD;
1905 * Return a string of Perl code to load the debugger. If PERL5DB
1906 * is set, it will return the contents of that, otherwise a
1907 * compile-time require of perl5db.pl.
1914 char *pdb = PerlEnv_getenv("PERL5DB");
1918 SETERRNO(0,SS$_NORMAL);
1919 return "BEGIN { require 'perl5db.pl' }";
1925 /* Encoded script support. filter_add() effectively inserts a
1926 * 'pre-processing' function into the current source input stream.
1927 * Note that the filter function only applies to the current source file
1928 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1930 * The datasv parameter (which may be NULL) can be used to pass
1931 * private data to this instance of the filter. The filter function
1932 * can recover the SV using the FILTER_DATA macro and use it to
1933 * store private buffers and state information.
1935 * The supplied datasv parameter is upgraded to a PVIO type
1936 * and the IoDIRP/IoANY field is used to store the function pointer,
1937 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1938 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1939 * private use must be set using malloc'd pointers.
1943 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1948 if (!PL_rsfp_filters)
1949 PL_rsfp_filters = newAV();
1951 datasv = NEWSV(255,0);
1952 if (!SvUPGRADE(datasv, SVt_PVIO))
1953 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1954 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1955 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1956 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1957 funcp, SvPV_nolen(datasv)));
1958 av_unshift(PL_rsfp_filters, 1);
1959 av_store(PL_rsfp_filters, 0, datasv) ;
1964 /* Delete most recently added instance of this filter function. */
1966 Perl_filter_del(pTHX_ filter_t funcp)
1969 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1970 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1972 /* if filter is on top of stack (usual case) just pop it off */
1973 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1974 if (IoANY(datasv) == (void *)funcp) {
1975 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1976 IoANY(datasv) = (void *)NULL;
1977 sv_free(av_pop(PL_rsfp_filters));
1981 /* we need to search for the correct entry and clear it */
1982 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1986 /* Invoke the n'th filter function for the current rsfp. */
1988 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1991 /* 0 = read one text line */
1996 if (!PL_rsfp_filters)
1998 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1999 /* Provide a default input filter to make life easy. */
2000 /* Note that we append to the line. This is handy. */
2001 DEBUG_P(PerlIO_printf(Perl_debug_log,
2002 "filter_read %d: from rsfp\n", idx));
2006 int old_len = SvCUR(buf_sv) ;
2008 /* ensure buf_sv is large enough */
2009 SvGROW(buf_sv, old_len + maxlen) ;
2010 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2011 if (PerlIO_error(PL_rsfp))
2012 return -1; /* error */
2014 return 0 ; /* end of file */
2016 SvCUR_set(buf_sv, old_len + len) ;
2019 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2020 if (PerlIO_error(PL_rsfp))
2021 return -1; /* error */
2023 return 0 ; /* end of file */
2026 return SvCUR(buf_sv);
2028 /* Skip this filter slot if filter has been deleted */
2029 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
2030 DEBUG_P(PerlIO_printf(Perl_debug_log,
2031 "filter_read %d: skipped (filter deleted)\n",
2033 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2035 /* Get function pointer hidden within datasv */
2036 funcp = (filter_t)IoANY(datasv);
2037 DEBUG_P(PerlIO_printf(Perl_debug_log,
2038 "filter_read %d: via function %p (%s)\n",
2039 idx, funcp, SvPV_nolen(datasv)));
2040 /* Call function. The function is expected to */
2041 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2042 /* Return: <0:error, =0:eof, >0:not eof */
2043 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
2047 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2049 #ifdef PERL_CR_FILTER
2050 if (!PL_rsfp_filters) {
2051 filter_add(S_cr_textfilter,NULL);
2054 if (PL_rsfp_filters) {
2057 SvCUR_set(sv, 0); /* start with empty line */
2058 if (FILTER_READ(0, sv, 0) > 0)
2059 return ( SvPVX(sv) ) ;
2064 return (sv_gets(sv, fp, append));
2068 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2072 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2076 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2077 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2079 return GvHV(gv); /* Foo:: */
2082 /* use constant CLASS => 'MyClass' */
2083 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2085 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2086 pkgname = SvPV_nolen(sv);
2090 return gv_stashpv(pkgname, FALSE);
2094 static char* exp_name[] =
2095 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2096 "ATTRTERM", "TERMBLOCK"
2103 Works out what to call the token just pulled out of the input
2104 stream. The yacc parser takes care of taking the ops we return and
2105 stitching them into a tree.
2111 if read an identifier
2112 if we're in a my declaration
2113 croak if they tried to say my($foo::bar)
2114 build the ops for a my() declaration
2115 if it's an access to a my() variable
2116 are we in a sort block?
2117 croak if my($a); $a <=> $b
2118 build ops for access to a my() variable
2119 if in a dq string, and they've said @foo and we can't find @foo
2121 build ops for a bareword
2122 if we already built the token before, use it.
2125 #ifdef USE_PURE_BISON
2127 Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
2132 yylval_pointer[yyactlevel] = lvalp;
2133 yychar_pointer[yyactlevel] = lcharp;
2134 if (yyactlevel >= YYMAXLEVEL)
2135 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
2137 r = Perl_yylex(aTHX);
2147 #pragma segment Perl_yylex
2160 /* check if there's an identifier for us to look at */
2161 if (PL_pending_ident) {
2162 /* pit holds the identifier we read and pending_ident is reset */
2163 char pit = PL_pending_ident;
2164 PL_pending_ident = 0;
2166 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2167 "### Tokener saw identifier '%s'\n", PL_tokenbuf); })
2169 /* if we're in a my(), we can't allow dynamics here.
2170 $foo'bar has already been turned into $foo::bar, so
2171 just check for colons.
2173 if it's a legal name, the OP is a PADANY.
2176 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2177 if (strchr(PL_tokenbuf,':'))
2178 yyerror(Perl_form(aTHX_ "No package name allowed for "
2179 "variable %s in \"our\"",
2181 tmp = pad_allocmy(PL_tokenbuf);
2184 if (strchr(PL_tokenbuf,':'))
2185 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2187 yylval.opval = newOP(OP_PADANY, 0);
2188 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2194 build the ops for accesses to a my() variable.
2196 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2197 then used in a comparison. This catches most, but not
2198 all cases. For instance, it catches
2199 sort { my($a); $a <=> $b }
2201 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2202 (although why you'd do that is anyone's guess).
2205 if (!strchr(PL_tokenbuf,':')) {
2207 /* Check for single character per-thread SVs */
2208 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2209 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2210 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2212 yylval.opval = newOP(OP_THREADSV, 0);
2213 yylval.opval->op_targ = tmp;
2216 #endif /* USE_THREADS */
2217 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2218 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2219 /* might be an "our" variable" */
2220 if (SvFLAGS(namesv) & SVpad_OUR) {
2221 /* build ops for a bareword */
2222 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2223 sv_catpvn(sym, "::", 2);
2224 sv_catpv(sym, PL_tokenbuf+1);
2225 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2226 yylval.opval->op_private = OPpCONST_ENTERED;
2227 gv_fetchpv(SvPVX(sym),
2229 ? (GV_ADDMULTI | GV_ADDINEVAL)
2232 ((PL_tokenbuf[0] == '$') ? SVt_PV
2233 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2238 /* if it's a sort block and they're naming $a or $b */
2239 if (PL_last_lop_op == OP_SORT &&
2240 PL_tokenbuf[0] == '$' &&
2241 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2244 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2245 d < PL_bufend && *d != '\n';
2248 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2249 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2255 yylval.opval = newOP(OP_PADANY, 0);
2256 yylval.opval->op_targ = tmp;
2262 Whine if they've said @foo in a doublequoted string,
2263 and @foo isn't a variable we can find in the symbol
2266 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2267 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2268 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2269 && ckWARN(WARN_AMBIGUOUS))
2271 /* Downgraded from fatal to warning 20000522 mjd */
2272 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2273 "Possible unintended interpolation of %s in string",
2278 /* build ops for a bareword */
2279 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2280 yylval.opval->op_private = OPpCONST_ENTERED;
2281 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2282 ((PL_tokenbuf[0] == '$') ? SVt_PV
2283 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2288 /* no identifier pending identification */
2290 switch (PL_lex_state) {
2292 case LEX_NORMAL: /* Some compilers will produce faster */
2293 case LEX_INTERPNORMAL: /* code if we comment these out. */
2297 /* when we've already built the next token, just pull it out of the queue */
2300 yylval = PL_nextval[PL_nexttoke];
2302 PL_lex_state = PL_lex_defer;
2303 PL_expect = PL_lex_expect;
2304 PL_lex_defer = LEX_NORMAL;
2306 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2307 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
2308 (IV)PL_nexttype[PL_nexttoke]); })
2310 return(PL_nexttype[PL_nexttoke]);
2312 /* interpolated case modifiers like \L \U, including \Q and \E.
2313 when we get here, PL_bufptr is at the \
2315 case LEX_INTERPCASEMOD:
2317 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2318 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2320 /* handle \E or end of string */
2321 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2325 if (PL_lex_casemods) {
2326 oldmod = PL_lex_casestack[--PL_lex_casemods];
2327 PL_lex_casestack[PL_lex_casemods] = '\0';
2329 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2331 PL_lex_state = LEX_INTERPCONCAT;
2335 if (PL_bufptr != PL_bufend)
2337 PL_lex_state = LEX_INTERPCONCAT;
2341 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2342 "### Saw case modifier at '%s'\n", PL_bufptr); })
2344 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2345 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2346 if (strchr("LU", *s) &&
2347 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2349 PL_lex_casestack[--PL_lex_casemods] = '\0';
2352 if (PL_lex_casemods > 10) {
2353 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2354 if (newlb != PL_lex_casestack) {
2356 PL_lex_casestack = newlb;
2359 PL_lex_casestack[PL_lex_casemods++] = *s;
2360 PL_lex_casestack[PL_lex_casemods] = '\0';
2361 PL_lex_state = LEX_INTERPCONCAT;
2362 PL_nextval[PL_nexttoke].ival = 0;
2365 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2367 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2369 PL_nextval[PL_nexttoke].ival = OP_LC;
2371 PL_nextval[PL_nexttoke].ival = OP_UC;
2373 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2375 Perl_croak(aTHX_ "panic: yylex");
2378 if (PL_lex_starts) {
2387 case LEX_INTERPPUSH:
2388 return sublex_push();
2390 case LEX_INTERPSTART:
2391 if (PL_bufptr == PL_bufend)
2392 return sublex_done();
2393 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2394 "### Interpolated variable at '%s'\n", PL_bufptr); })
2396 PL_lex_dojoin = (*PL_bufptr == '@');
2397 PL_lex_state = LEX_INTERPNORMAL;
2398 if (PL_lex_dojoin) {
2399 PL_nextval[PL_nexttoke].ival = 0;
2402 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2403 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2404 force_next(PRIVATEREF);
2406 force_ident("\"", '$');
2407 #endif /* USE_THREADS */
2408 PL_nextval[PL_nexttoke].ival = 0;
2410 PL_nextval[PL_nexttoke].ival = 0;
2412 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2415 if (PL_lex_starts++) {
2421 case LEX_INTERPENDMAYBE:
2422 if (intuit_more(PL_bufptr)) {
2423 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2429 if (PL_lex_dojoin) {
2430 PL_lex_dojoin = FALSE;
2431 PL_lex_state = LEX_INTERPCONCAT;
2434 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2435 && SvEVALED(PL_lex_repl))
2437 if (PL_bufptr != PL_bufend)
2438 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2439 PL_lex_repl = Nullsv;
2442 case LEX_INTERPCONCAT:
2444 if (PL_lex_brackets)
2445 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2447 if (PL_bufptr == PL_bufend)
2448 return sublex_done();
2450 if (SvIVX(PL_linestr) == '\'') {
2451 SV *sv = newSVsv(PL_linestr);
2454 else if ( PL_hints & HINT_NEW_RE )
2455 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2456 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2460 s = scan_const(PL_bufptr);
2462 PL_lex_state = LEX_INTERPCASEMOD;
2464 PL_lex_state = LEX_INTERPSTART;
2467 if (s != PL_bufptr) {
2468 PL_nextval[PL_nexttoke] = yylval;
2471 if (PL_lex_starts++)
2481 PL_lex_state = LEX_NORMAL;
2482 s = scan_formline(PL_bufptr);
2483 if (!PL_lex_formbrack)
2489 PL_oldoldbufptr = PL_oldbufptr;
2492 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2493 exp_name[PL_expect], s);
2499 if (isIDFIRST_lazy_if(s,UTF))
2501 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2504 goto fake_eof; /* emulate EOF on ^D or ^Z */
2509 if (PL_lex_brackets)
2510 yyerror("Missing right curly or square bracket");
2511 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2512 "### Tokener got EOF\n");
2516 if (s++ < PL_bufend)
2517 goto retry; /* ignore stray nulls */
2520 if (!PL_in_eval && !PL_preambled) {
2521 PL_preambled = TRUE;
2522 sv_setpv(PL_linestr,incl_perldb());
2523 if (SvCUR(PL_linestr))
2524 sv_catpv(PL_linestr,";");
2526 while(AvFILLp(PL_preambleav) >= 0) {
2527 SV *tmpsv = av_shift(PL_preambleav);
2528 sv_catsv(PL_linestr, tmpsv);
2529 sv_catpv(PL_linestr, ";");
2532 sv_free((SV*)PL_preambleav);
2533 PL_preambleav = NULL;
2535 if (PL_minus_n || PL_minus_p) {
2536 sv_catpv(PL_linestr, "LINE: while (<>) {");
2538 sv_catpv(PL_linestr,"chomp;");
2540 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2542 GvIMPORTED_AV_on(gv);
2544 if (strchr("/'\"", *PL_splitstr)
2545 && strchr(PL_splitstr + 1, *PL_splitstr))
2546 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2549 s = "'~#\200\1'"; /* surely one char is unused...*/
2550 while (s[1] && strchr(PL_splitstr, *s)) s++;
2552 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2553 "q" + (delim == '\''), delim);
2554 for (s = PL_splitstr; *s; s++) {
2556 sv_catpvn(PL_linestr, "\\", 1);
2557 sv_catpvn(PL_linestr, s, 1);
2559 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2563 sv_catpv(PL_linestr,"@F=split(' ');");
2566 sv_catpv(PL_linestr, "\n");
2567 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2568 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2569 PL_last_lop = PL_last_uni = Nullch;
2570 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2571 SV *sv = NEWSV(85,0);
2573 sv_upgrade(sv, SVt_PVMG);
2574 sv_setsv(sv,PL_linestr);
2575 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2580 bof = PL_rsfp ? TRUE : FALSE;
2581 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2584 if (PL_preprocess && !PL_in_eval)
2585 (void)PerlProc_pclose(PL_rsfp);
2586 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2587 PerlIO_clearerr(PL_rsfp);
2589 (void)PerlIO_close(PL_rsfp);
2591 PL_doextract = FALSE;
2593 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2594 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2595 sv_catpv(PL_linestr,";}");
2596 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2597 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2598 PL_last_lop = PL_last_uni = Nullch;
2599 PL_minus_n = PL_minus_p = 0;
2602 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2603 PL_last_lop = PL_last_uni = Nullch;
2604 sv_setpv(PL_linestr,"");
2605 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2607 /* if it looks like the start of a BOM, check if it in fact is */
2608 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
2609 #ifdef PERLIO_IS_STDIO
2610 # ifdef __GNU_LIBRARY__
2611 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
2612 # define FTELL_FOR_PIPE_IS_BROKEN
2616 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2617 # define FTELL_FOR_PIPE_IS_BROKEN
2622 #ifdef FTELL_FOR_PIPE_IS_BROKEN
2623 /* This loses the possibility to detect the bof
2624 * situation on perl -P when the libc5 is being used.
2625 * Workaround? Maybe attach some extra state to PL_rsfp?
2628 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2630 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2633 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2634 s = swallow_bom((U8*)s);
2638 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2639 PL_doextract = FALSE;
2641 /* Incest with pod. */
2642 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2643 sv_setpv(PL_linestr, "");
2644 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2645 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2646 PL_last_lop = PL_last_uni = Nullch;
2647 PL_doextract = FALSE;
2651 } while (PL_doextract);
2652 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2653 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2654 SV *sv = NEWSV(85,0);
2656 sv_upgrade(sv, SVt_PVMG);
2657 sv_setsv(sv,PL_linestr);
2658 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2660 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2661 PL_last_lop = PL_last_uni = Nullch;
2662 if (CopLINE(PL_curcop) == 1) {
2663 while (s < PL_bufend && isSPACE(*s))
2665 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2669 if (*s == '#' && *(s+1) == '!')
2671 #ifdef ALTERNATE_SHEBANG
2673 static char as[] = ALTERNATE_SHEBANG;
2674 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2675 d = s + (sizeof(as) - 1);
2677 #endif /* ALTERNATE_SHEBANG */
2686 while (*d && !isSPACE(*d))
2690 #ifdef ARG_ZERO_IS_SCRIPT
2691 if (ipathend > ipath) {
2693 * HP-UX (at least) sets argv[0] to the script name,
2694 * which makes $^X incorrect. And Digital UNIX and Linux,
2695 * at least, set argv[0] to the basename of the Perl
2696 * interpreter. So, having found "#!", we'll set it right.
2698 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2699 assert(SvPOK(x) || SvGMAGICAL(x));
2700 if (sv_eq(x, CopFILESV(PL_curcop))) {
2701 sv_setpvn(x, ipath, ipathend - ipath);
2704 TAINT_NOT; /* $^X is always tainted, but that's OK */
2706 #endif /* ARG_ZERO_IS_SCRIPT */
2711 d = instr(s,"perl -");
2713 d = instr(s,"perl");
2715 /* avoid getting into infinite loops when shebang
2716 * line contains "Perl" rather than "perl" */
2718 for (d = ipathend-4; d >= ipath; --d) {
2719 if ((*d == 'p' || *d == 'P')
2720 && !ibcmp(d, "perl", 4))
2730 #ifdef ALTERNATE_SHEBANG
2732 * If the ALTERNATE_SHEBANG on this system starts with a
2733 * character that can be part of a Perl expression, then if
2734 * we see it but not "perl", we're probably looking at the
2735 * start of Perl code, not a request to hand off to some
2736 * other interpreter. Similarly, if "perl" is there, but
2737 * not in the first 'word' of the line, we assume the line
2738 * contains the start of the Perl program.
2740 if (d && *s != '#') {
2742 while (*c && !strchr("; \t\r\n\f\v#", *c))
2745 d = Nullch; /* "perl" not in first word; ignore */
2747 *s = '#'; /* Don't try to parse shebang line */
2749 #endif /* ALTERNATE_SHEBANG */
2750 #ifndef MACOS_TRADITIONAL
2755 !instr(s,"indir") &&
2756 instr(PL_origargv[0],"perl"))
2762 while (s < PL_bufend && isSPACE(*s))
2764 if (s < PL_bufend) {
2765 Newz(899,newargv,PL_origargc+3,char*);
2767 while (s < PL_bufend && !isSPACE(*s))
2770 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2773 newargv = PL_origargv;
2775 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
2776 Perl_croak(aTHX_ "Can't exec %s", ipath);
2780 U32 oldpdb = PL_perldb;
2781 bool oldn = PL_minus_n;
2782 bool oldp = PL_minus_p;
2784 while (*d && !isSPACE(*d)) d++;
2785 while (SPACE_OR_TAB(*d)) d++;
2789 if (*d == 'M' || *d == 'm') {
2791 while (*d && !isSPACE(*d)) d++;
2792 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2795 d = moreswitches(d);
2797 if ((PERLDB_LINE && !oldpdb) ||
2798 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2799 /* if we have already added "LINE: while (<>) {",
2800 we must not do it again */
2802 sv_setpv(PL_linestr, "");
2803 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2804 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2805 PL_last_lop = PL_last_uni = Nullch;
2806 PL_preambled = FALSE;
2808 (void)gv_fetchfile(PL_origfilename);
2815 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2817 PL_lex_state = LEX_FORMLINE;
2822 #ifdef PERL_STRICT_CR
2823 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2825 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2827 case ' ': case '\t': case '\f': case 013:
2828 #ifdef MACOS_TRADITIONAL
2835 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2836 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2837 /* handle eval qq[#line 1 "foo"\n ...] */
2838 CopLINE_dec(PL_curcop);
2842 while (s < d && *s != '\n')
2847 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2849 PL_lex_state = LEX_FORMLINE;
2859 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2866 while (s < PL_bufend && SPACE_OR_TAB(*s))
2869 if (strnEQ(s,"=>",2)) {
2870 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2871 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2872 "### Saw unary minus before =>, forcing word '%s'\n", s);
2874 OPERATOR('-'); /* unary minus */
2876 PL_last_uni = PL_oldbufptr;
2878 case 'r': ftst = OP_FTEREAD; break;
2879 case 'w': ftst = OP_FTEWRITE; break;
2880 case 'x': ftst = OP_FTEEXEC; break;
2881 case 'o': ftst = OP_FTEOWNED; break;
2882 case 'R': ftst = OP_FTRREAD; break;
2883 case 'W': ftst = OP_FTRWRITE; break;
2884 case 'X': ftst = OP_FTREXEC; break;
2885 case 'O': ftst = OP_FTROWNED; break;
2886 case 'e': ftst = OP_FTIS; break;
2887 case 'z': ftst = OP_FTZERO; break;
2888 case 's': ftst = OP_FTSIZE; break;
2889 case 'f': ftst = OP_FTFILE; break;
2890 case 'd': ftst = OP_FTDIR; break;
2891 case 'l': ftst = OP_FTLINK; break;
2892 case 'p': ftst = OP_FTPIPE; break;
2893 case 'S': ftst = OP_FTSOCK; break;
2894 case 'u': ftst = OP_FTSUID; break;
2895 case 'g': ftst = OP_FTSGID; break;
2896 case 'k': ftst = OP_FTSVTX; break;
2897 case 'b': ftst = OP_FTBLK; break;
2898 case 'c': ftst = OP_FTCHR; break;
2899 case 't': ftst = OP_FTTTY; break;
2900 case 'T': ftst = OP_FTTEXT; break;
2901 case 'B': ftst = OP_FTBINARY; break;
2902 case 'M': case 'A': case 'C':
2903 gv_fetchpv("\024",TRUE, SVt_PV);
2905 case 'M': ftst = OP_FTMTIME; break;
2906 case 'A': ftst = OP_FTATIME; break;
2907 case 'C': ftst = OP_FTCTIME; break;
2915 PL_last_lop_op = ftst;
2916 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2917 "### Saw file test %c\n", (int)ftst);
2922 /* Assume it was a minus followed by a one-letter named
2923 * subroutine call (or a -bareword), then. */
2924 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2925 "### %c looked like a file test but was not\n",
2934 if (PL_expect == XOPERATOR)
2939 else if (*s == '>') {
2942 if (isIDFIRST_lazy_if(s,UTF)) {
2943 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2951 if (PL_expect == XOPERATOR)
2954 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2956 OPERATOR('-'); /* unary minus */
2963 if (PL_expect == XOPERATOR)
2968 if (PL_expect == XOPERATOR)
2971 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2977 if (PL_expect != XOPERATOR) {
2978 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2979 PL_expect = XOPERATOR;
2980 force_ident(PL_tokenbuf, '*');
2993 if (PL_expect == XOPERATOR) {
2997 PL_tokenbuf[0] = '%';
2998 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2999 if (!PL_tokenbuf[1]) {
3001 yyerror("Final % should be \\% or %name");
3004 PL_pending_ident = '%';
3023 switch (PL_expect) {
3026 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
3028 PL_bufptr = s; /* update in case we back off */
3034 PL_expect = XTERMBLOCK;
3038 while (isIDFIRST_lazy_if(s,UTF)) {
3039 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3040 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
3041 if (tmp < 0) tmp = -tmp;
3056 d = scan_str(d,TRUE,TRUE);
3058 /* MUST advance bufptr here to avoid bogus
3059 "at end of line" context messages from yyerror().
3061 PL_bufptr = s + len;
3062 yyerror("Unterminated attribute parameter in attribute list");
3065 return 0; /* EOF indicator */
3069 SV *sv = newSVpvn(s, len);
3070 sv_catsv(sv, PL_lex_stuff);
3071 attrs = append_elem(OP_LIST, attrs,
3072 newSVOP(OP_CONST, 0, sv));
3073 SvREFCNT_dec(PL_lex_stuff);
3074 PL_lex_stuff = Nullsv;
3077 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
3078 CvLVALUE_on(PL_compcv);
3079 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
3080 CvLOCKED_on(PL_compcv);
3081 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
3082 CvMETHOD_on(PL_compcv);
3084 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "shared", len))
3085 GvSHARED_on(cGVOPx_gv(yylval.opval));
3087 /* After we've set the flags, it could be argued that
3088 we don't need to do the attributes.pm-based setting
3089 process, and shouldn't bother appending recognized
3090 flags. To experiment with that, uncomment the
3091 following "else": */
3093 attrs = append_elem(OP_LIST, attrs,
3094 newSVOP(OP_CONST, 0,
3098 if (*s == ':' && s[1] != ':')
3101 break; /* require real whitespace or :'s */
3103 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
3104 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
3105 char q = ((*s == '\'') ? '"' : '\'');
3106 /* If here for an expression, and parsed no attrs, back off. */
3107 if (tmp == '=' && !attrs) {
3111 /* MUST advance bufptr here to avoid bogus "at end of line"
3112 context messages from yyerror().
3116 yyerror("Unterminated attribute list");
3118 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3126 PL_nextval[PL_nexttoke].opval = attrs;
3134 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3135 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
3151 if (PL_lex_brackets <= 0)
3152 yyerror("Unmatched right square bracket");
3155 if (PL_lex_state == LEX_INTERPNORMAL) {
3156 if (PL_lex_brackets == 0) {
3157 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3158 PL_lex_state = LEX_INTERPEND;
3165 if (PL_lex_brackets > 100) {
3166 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3167 if (newlb != PL_lex_brackstack) {
3169 PL_lex_brackstack = newlb;
3172 switch (PL_expect) {
3174 if (PL_lex_formbrack) {
3178 if (PL_oldoldbufptr == PL_last_lop)
3179 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3181 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3182 OPERATOR(HASHBRACK);
3184 while (s < PL_bufend && SPACE_OR_TAB(*s))
3187 PL_tokenbuf[0] = '\0';
3188 if (d < PL_bufend && *d == '-') {
3189 PL_tokenbuf[0] = '-';
3191 while (d < PL_bufend && SPACE_OR_TAB(*d))
3194 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3195 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3197 while (d < PL_bufend && SPACE_OR_TAB(*d))
3200 char minus = (PL_tokenbuf[0] == '-');
3201 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3209 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3214 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3219 if (PL_oldoldbufptr == PL_last_lop)
3220 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3222 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3225 OPERATOR(HASHBRACK);
3226 /* This hack serves to disambiguate a pair of curlies
3227 * as being a block or an anon hash. Normally, expectation
3228 * determines that, but in cases where we're not in a
3229 * position to expect anything in particular (like inside
3230 * eval"") we have to resolve the ambiguity. This code
3231 * covers the case where the first term in the curlies is a
3232 * quoted string. Most other cases need to be explicitly
3233 * disambiguated by prepending a `+' before the opening
3234 * curly in order to force resolution as an anon hash.
3236 * XXX should probably propagate the outer expectation
3237 * into eval"" to rely less on this hack, but that could
3238 * potentially break current behavior of eval"".
3242 if (*s == '\'' || *s == '"' || *s == '`') {
3243 /* common case: get past first string, handling escapes */
3244 for (t++; t < PL_bufend && *t != *s;)
3245 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3249 else if (*s == 'q') {
3252 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3256 char open, close, term;
3259 while (t < PL_bufend && isSPACE(*t))
3263 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3267 for (t++; t < PL_bufend; t++) {
3268 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3270 else if (*t == open)
3274 for (t++; t < PL_bufend; t++) {
3275 if (*t == '\\' && t+1 < PL_bufend)
3277 else if (*t == close && --brackets <= 0)
3279 else if (*t == open)
3285 else if (isALNUM_lazy_if(t,UTF)) {
3287 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3290 while (t < PL_bufend && isSPACE(*t))
3292 /* if comma follows first term, call it an anon hash */
3293 /* XXX it could be a comma expression with loop modifiers */
3294 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3295 || (*t == '=' && t[1] == '>')))
3296 OPERATOR(HASHBRACK);
3297 if (PL_expect == XREF)
3300 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3306 yylval.ival = CopLINE(PL_curcop);
3307 if (isSPACE(*s) || *s == '#')
3308 PL_copline = NOLINE; /* invalidate current command line number */
3313 if (PL_lex_brackets <= 0)
3314 yyerror("Unmatched right curly bracket");
3316 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3317 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3318 PL_lex_formbrack = 0;
3319 if (PL_lex_state == LEX_INTERPNORMAL) {
3320 if (PL_lex_brackets == 0) {
3321 if (PL_expect & XFAKEBRACK) {
3322 PL_expect &= XENUMMASK;
3323 PL_lex_state = LEX_INTERPEND;
3325 return yylex(); /* ignore fake brackets */
3327 if (*s == '-' && s[1] == '>')
3328 PL_lex_state = LEX_INTERPENDMAYBE;
3329 else if (*s != '[' && *s != '{')
3330 PL_lex_state = LEX_INTERPEND;
3333 if (PL_expect & XFAKEBRACK) {
3334 PL_expect &= XENUMMASK;
3336 return yylex(); /* ignore fake brackets */
3346 if (PL_expect == XOPERATOR) {
3347 if (ckWARN(WARN_SEMICOLON)
3348 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3350 CopLINE_dec(PL_curcop);
3351 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3352 CopLINE_inc(PL_curcop);
3357 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3359 PL_expect = XOPERATOR;
3360 force_ident(PL_tokenbuf, '&');
3364 yylval.ival = (OPpENTERSUB_AMPER<<8);
3383 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3384 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3386 if (PL_expect == XSTATE && isALPHA(tmp) &&
3387 (s == PL_linestart+1 || s[-2] == '\n') )
3389 if (PL_in_eval && !PL_rsfp) {
3394 if (strnEQ(s,"=cut",4)) {
3408 PL_doextract = TRUE;
3411 if (PL_lex_brackets < PL_lex_formbrack) {
3413 #ifdef PERL_STRICT_CR
3414 for (t = s; SPACE_OR_TAB(*t); t++) ;
3416 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3418 if (*t == '\n' || *t == '#') {
3436 if (PL_expect != XOPERATOR) {
3437 if (s[1] != '<' && !strchr(s,'>'))
3440 s = scan_heredoc(s);
3442 s = scan_inputsymbol(s);
3443 TERM(sublex_start());
3448 SHop(OP_LEFT_SHIFT);
3462 SHop(OP_RIGHT_SHIFT);
3471 if (PL_expect == XOPERATOR) {
3472 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3475 return ','; /* grandfather non-comma-format format */
3479 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3480 PL_tokenbuf[0] = '@';
3481 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3482 sizeof PL_tokenbuf - 1, FALSE);
3483 if (PL_expect == XOPERATOR)
3484 no_op("Array length", s);
3485 if (!PL_tokenbuf[1])
3487 PL_expect = XOPERATOR;
3488 PL_pending_ident = '#';
3492 PL_tokenbuf[0] = '$';
3493 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3494 sizeof PL_tokenbuf - 1, FALSE);
3495 if (PL_expect == XOPERATOR)
3497 if (!PL_tokenbuf[1]) {
3499 yyerror("Final $ should be \\$ or $name");
3503 /* This kludge not intended to be bulletproof. */
3504 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3505 yylval.opval = newSVOP(OP_CONST, 0,
3506 newSViv(PL_compiling.cop_arybase));
3507 yylval.opval->op_private = OPpCONST_ARYBASE;
3513 if (PL_lex_state == LEX_NORMAL)
3516 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3519 PL_tokenbuf[0] = '@';
3520 if (ckWARN(WARN_SYNTAX)) {
3522 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3525 PL_bufptr = skipspace(PL_bufptr);
3526 while (t < PL_bufend && *t != ']')
3528 Perl_warner(aTHX_ WARN_SYNTAX,
3529 "Multidimensional syntax %.*s not supported",
3530 (t - PL_bufptr) + 1, PL_bufptr);
3534 else if (*s == '{') {
3535 PL_tokenbuf[0] = '%';
3536 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3537 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3539 char tmpbuf[sizeof PL_tokenbuf];
3541 for (t++; isSPACE(*t); t++) ;
3542 if (isIDFIRST_lazy_if(t,UTF)) {
3543 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3544 for (; isSPACE(*t); t++) ;
3545 if (*t == ';' && get_cv(tmpbuf, FALSE))
3546 Perl_warner(aTHX_ WARN_SYNTAX,
3547 "You need to quote \"%s\"", tmpbuf);
3553 PL_expect = XOPERATOR;
3554 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3555 bool islop = (PL_last_lop == PL_oldoldbufptr);
3556 if (!islop || PL_last_lop_op == OP_GREPSTART)
3557 PL_expect = XOPERATOR;
3558 else if (strchr("$@\"'`q", *s))
3559 PL_expect = XTERM; /* e.g. print $fh "foo" */
3560 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3561 PL_expect = XTERM; /* e.g. print $fh &sub */
3562 else if (isIDFIRST_lazy_if(s,UTF)) {
3563 char tmpbuf[sizeof PL_tokenbuf];
3564 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3565 if ((tmp = keyword(tmpbuf, len))) {
3566 /* binary operators exclude handle interpretations */
3578 PL_expect = XTERM; /* e.g. print $fh length() */
3583 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3584 if (gv && GvCVu(gv))
3585 PL_expect = XTERM; /* e.g. print $fh subr() */
3588 else if (isDIGIT(*s))
3589 PL_expect = XTERM; /* e.g. print $fh 3 */
3590 else if (*s == '.' && isDIGIT(s[1]))
3591 PL_expect = XTERM; /* e.g. print $fh .3 */
3592 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3593 PL_expect = XTERM; /* e.g. print $fh -1 */
3594 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3595 PL_expect = XTERM; /* print $fh <<"EOF" */
3597 PL_pending_ident = '$';
3601 if (PL_expect == XOPERATOR)
3603 PL_tokenbuf[0] = '@';
3604 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3605 if (!PL_tokenbuf[1]) {
3607 yyerror("Final @ should be \\@ or @name");
3610 if (PL_lex_state == LEX_NORMAL)
3612 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3614 PL_tokenbuf[0] = '%';
3616 /* Warn about @ where they meant $. */
3617 if (ckWARN(WARN_SYNTAX)) {
3618 if (*s == '[' || *s == '{') {
3620 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3622 if (*t == '}' || *t == ']') {
3624 PL_bufptr = skipspace(PL_bufptr);
3625 Perl_warner(aTHX_ WARN_SYNTAX,
3626 "Scalar value %.*s better written as $%.*s",
3627 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3632 PL_pending_ident = '@';
3635 case '/': /* may either be division or pattern */
3636 case '?': /* may either be conditional or pattern */
3637 if (PL_expect != XOPERATOR) {
3638 /* Disable warning on "study /blah/" */
3639 if (PL_oldoldbufptr == PL_last_uni
3640 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3641 || memNE(PL_last_uni, "study", 5)
3642 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3644 s = scan_pat(s,OP_MATCH);
3645 TERM(sublex_start());
3653 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3654 #ifdef PERL_STRICT_CR
3657 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3659 && (s == PL_linestart || s[-1] == '\n') )
3661 PL_lex_formbrack = 0;
3665 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3671 yylval.ival = OPf_SPECIAL;
3677 if (PL_expect != XOPERATOR)
3682 case '0': case '1': case '2': case '3': case '4':
3683 case '5': case '6': case '7': case '8': case '9':
3684 s = scan_num(s, &yylval);
3685 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3686 "### Saw number in '%s'\n", s);
3688 if (PL_expect == XOPERATOR)
3693 s = scan_str(s,FALSE,FALSE);
3694 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3695 "### Saw string before '%s'\n", s);
3697 if (PL_expect == XOPERATOR) {
3698 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3701 return ','; /* grandfather non-comma-format format */
3707 missingterm((char*)0);
3708 yylval.ival = OP_CONST;
3709 TERM(sublex_start());
3712 s = scan_str(s,FALSE,FALSE);
3713 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3714 "### Saw string before '%s'\n", s);
3716 if (PL_expect == XOPERATOR) {
3717 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3720 return ','; /* grandfather non-comma-format format */
3726 missingterm((char*)0);
3727 yylval.ival = OP_CONST;
3728 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3729 if (*d == '$' || *d == '@' || *d == '\\' || UTF8_IS_CONTINUED(*d)) {
3730 yylval.ival = OP_STRINGIFY;
3734 TERM(sublex_start());
3737 s = scan_str(s,FALSE,FALSE);
3738 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3739 "### Saw backtick string before '%s'\n", s);
3741 if (PL_expect == XOPERATOR)
3742 no_op("Backticks",s);
3744 missingterm((char*)0);
3745 yylval.ival = OP_BACKTICK;
3747 TERM(sublex_start());
3751 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3752 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3754 if (PL_expect == XOPERATOR)
3755 no_op("Backslash",s);
3759 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3763 while (isDIGIT(*start) || *start == '_')
3765 if (*start == '.' && isDIGIT(start[1])) {
3766 s = scan_num(s, &yylval);
3769 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3770 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3774 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3777 s = scan_num(s, &yylval);
3784 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3823 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3825 /* Some keywords can be followed by any delimiter, including ':' */
3826 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3827 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3828 (PL_tokenbuf[0] == 'q' &&
3829 strchr("qwxr", PL_tokenbuf[1])))));
3831 /* x::* is just a word, unless x is "CORE" */
3832 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3836 while (d < PL_bufend && isSPACE(*d))
3837 d++; /* no comments skipped here, or s### is misparsed */
3839 /* Is this a label? */
3840 if (!tmp && PL_expect == XSTATE
3841 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3843 yylval.pval = savepv(PL_tokenbuf);
3848 /* Check for keywords */
3849 tmp = keyword(PL_tokenbuf, len);
3851 /* Is this a word before a => operator? */
3852 if (*d == '=' && d[1] == '>') {
3854 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3855 yylval.opval->op_private = OPpCONST_BARE;
3856 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
3857 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3861 if (tmp < 0) { /* second-class keyword? */
3862 GV *ogv = Nullgv; /* override (winner) */
3863 GV *hgv = Nullgv; /* hidden (loser) */
3864 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3866 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3869 if (GvIMPORTED_CV(gv))
3871 else if (! CvMETHOD(cv))
3875 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3876 (gv = *gvp) != (GV*)&PL_sv_undef &&
3877 GvCVu(gv) && GvIMPORTED_CV(gv))
3883 tmp = 0; /* overridden by import or by GLOBAL */
3886 && -tmp==KEY_lock /* XXX generalizable kludge */
3888 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3890 tmp = 0; /* any sub overrides "weak" keyword */
3892 else { /* no override */
3896 if (ckWARN(WARN_AMBIGUOUS) && hgv
3897 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3898 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3899 "Ambiguous call resolved as CORE::%s(), %s",
3900 GvENAME(hgv), "qualify as such or use &");
3907 default: /* not a keyword */
3910 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3912 /* Get the rest if it looks like a package qualifier */
3914 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3916 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3919 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3920 *s == '\'' ? "'" : "::");
3924 if (PL_expect == XOPERATOR) {
3925 if (PL_bufptr == PL_linestart) {
3926 CopLINE_dec(PL_curcop);
3927 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3928 CopLINE_inc(PL_curcop);
3931 no_op("Bareword",s);
3934 /* Look for a subroutine with this name in current package,
3935 unless name is "Foo::", in which case Foo is a bearword
3936 (and a package name). */
3939 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3941 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3942 Perl_warner(aTHX_ WARN_BAREWORD,
3943 "Bareword \"%s\" refers to nonexistent package",
3946 PL_tokenbuf[len] = '\0';
3953 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3956 /* if we saw a global override before, get the right name */
3959 sv = newSVpvn("CORE::GLOBAL::",14);
3960 sv_catpv(sv,PL_tokenbuf);
3963 sv = newSVpv(PL_tokenbuf,0);
3965 /* Presume this is going to be a bareword of some sort. */
3968 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3969 yylval.opval->op_private = OPpCONST_BARE;
3971 /* And if "Foo::", then that's what it certainly is. */
3976 /* See if it's the indirect object for a list operator. */
3978 if (PL_oldoldbufptr &&
3979 PL_oldoldbufptr < PL_bufptr &&
3980 (PL_oldoldbufptr == PL_last_lop
3981 || PL_oldoldbufptr == PL_last_uni) &&
3982 /* NO SKIPSPACE BEFORE HERE! */
3983 (PL_expect == XREF ||
3984 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3986 bool immediate_paren = *s == '(';
3988 /* (Now we can afford to cross potential line boundary.) */
3991 /* Two barewords in a row may indicate method call. */
3993 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3996 /* If not a declared subroutine, it's an indirect object. */
3997 /* (But it's an indir obj regardless for sort.) */
3999 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
4000 ((!gv || !GvCVu(gv)) &&
4001 (PL_last_lop_op != OP_MAPSTART &&
4002 PL_last_lop_op != OP_GREPSTART))))
4004 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
4010 PL_expect = XOPERATOR;
4013 /* Is this a word before a => operator? */
4014 if (*s == '=' && s[1] == '>') {
4016 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
4017 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
4018 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
4022 /* If followed by a paren, it's certainly a subroutine. */
4025 if (gv && GvCVu(gv)) {
4026 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
4027 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
4032 PL_nextval[PL_nexttoke].opval = yylval.opval;
4033 PL_expect = XOPERATOR;
4039 /* If followed by var or block, call it a method (unless sub) */
4041 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
4042 PL_last_lop = PL_oldbufptr;
4043 PL_last_lop_op = OP_METHOD;
4047 /* If followed by a bareword, see if it looks like indir obj. */
4049 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
4052 /* Not a method, so call it a subroutine (if defined) */
4054 if (gv && GvCVu(gv)) {
4056 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
4057 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4058 "Ambiguous use of -%s resolved as -&%s()",
4059 PL_tokenbuf, PL_tokenbuf);
4060 /* Check for a constant sub */
4062 if ((sv = cv_const_sv(cv))) {
4064 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
4065 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
4066 yylval.opval->op_private = 0;
4070 /* Resolve to GV now. */
4071 op_free(yylval.opval);
4072 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
4073 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
4074 PL_last_lop = PL_oldbufptr;
4075 PL_last_lop_op = OP_ENTERSUB;
4076 /* Is there a prototype? */
4079 char *proto = SvPV((SV*)cv, len);
4082 if (strEQ(proto, "$"))
4084 if (*proto == '&' && *s == '{') {
4085 sv_setpv(PL_subname,"__ANON__");
4089 PL_nextval[PL_nexttoke].opval = yylval.opval;
4095 /* Call it a bare word */
4097 if (PL_hints & HINT_STRICT_SUBS)
4098 yylval.opval->op_private |= OPpCONST_STRICT;
4101 if (ckWARN(WARN_RESERVED)) {
4102 if (lastchar != '-') {
4103 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
4105 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
4112 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
4113 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4114 "Operator or semicolon missing before %c%s",
4115 lastchar, PL_tokenbuf);
4116 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4117 "Ambiguous use of %c resolved as operator %c",
4118 lastchar, lastchar);
4124 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4125 newSVpv(CopFILE(PL_curcop),0));
4129 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4130 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
4133 case KEY___PACKAGE__:
4134 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4136 ? newSVsv(PL_curstname)
4145 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
4146 char *pname = "main";
4147 if (PL_tokenbuf[2] == 'D')
4148 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
4149 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
4152 GvIOp(gv) = newIO();
4153 IoIFP(GvIOp(gv)) = PL_rsfp;
4154 #if defined(HAS_FCNTL) && defined(F_SETFD)
4156 int fd = PerlIO_fileno(PL_rsfp);
4157 fcntl(fd,F_SETFD,fd >= 3);
4160 /* Mark this internal pseudo-handle as clean */
4161 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
4163 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
4164 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
4165 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
4167 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
4168 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4169 /* if the script was opened in binmode, we need to revert
4170 * it to text mode for compatibility; but only iff it has CRs
4171 * XXX this is a questionable hack at best. */
4172 if (PL_bufend-PL_bufptr > 2
4173 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4176 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4177 loc = PerlIO_tell(PL_rsfp);
4178 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4180 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4182 PerlIO_seek(PL_rsfp, loc, 0);
4186 #ifdef PERLIO_LAYERS
4187 if (UTF && !IN_BYTE)
4188 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4201 if (PL_expect == XSTATE) {
4208 if (*s == ':' && s[1] == ':') {
4211 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4212 if (!(tmp = keyword(PL_tokenbuf, len)))
4213 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4227 LOP(OP_ACCEPT,XTERM);
4233 LOP(OP_ATAN2,XTERM);
4239 LOP(OP_BINMODE,XTERM);
4242 LOP(OP_BLESS,XTERM);
4251 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4268 if (!PL_cryptseen) {
4269 PL_cryptseen = TRUE;
4273 LOP(OP_CRYPT,XTERM);
4276 if (ckWARN(WARN_CHMOD)) {
4277 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4278 if (*d != '0' && isDIGIT(*d))
4279 Perl_warner(aTHX_ WARN_CHMOD,
4280 "chmod() mode argument is missing initial 0");
4282 LOP(OP_CHMOD,XTERM);
4285 LOP(OP_CHOWN,XTERM);
4288 LOP(OP_CONNECT,XTERM);
4304 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4308 PL_hints |= HINT_BLOCK_SCOPE;
4318 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4319 LOP(OP_DBMOPEN,XTERM);
4325 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4332 yylval.ival = CopLINE(PL_curcop);
4346 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4347 UNIBRACK(OP_ENTEREVAL);
4362 case KEY_endhostent:
4368 case KEY_endservent:
4371 case KEY_endprotoent:
4382 yylval.ival = CopLINE(PL_curcop);
4384 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4386 if ((PL_bufend - p) >= 3 &&
4387 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4389 else if ((PL_bufend - p) >= 4 &&
4390 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4393 if (isIDFIRST_lazy_if(p,UTF)) {
4394 p = scan_ident(p, PL_bufend,
4395 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4399 Perl_croak(aTHX_ "Missing $ on loop variable");
4404 LOP(OP_FORMLINE,XTERM);
4410 LOP(OP_FCNTL,XTERM);
4416 LOP(OP_FLOCK,XTERM);
4425 LOP(OP_GREPSTART, XREF);
4428 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4443 case KEY_getpriority:
4444 LOP(OP_GETPRIORITY,XTERM);
4446 case KEY_getprotobyname:
4449 case KEY_getprotobynumber:
4450 LOP(OP_GPBYNUMBER,XTERM);
4452 case KEY_getprotoent:
4464 case KEY_getpeername:
4465 UNI(OP_GETPEERNAME);
4467 case KEY_gethostbyname:
4470 case KEY_gethostbyaddr:
4471 LOP(OP_GHBYADDR,XTERM);
4473 case KEY_gethostent:
4476 case KEY_getnetbyname:
4479 case KEY_getnetbyaddr:
4480 LOP(OP_GNBYADDR,XTERM);
4485 case KEY_getservbyname:
4486 LOP(OP_GSBYNAME,XTERM);
4488 case KEY_getservbyport:
4489 LOP(OP_GSBYPORT,XTERM);
4491 case KEY_getservent:
4494 case KEY_getsockname:
4495 UNI(OP_GETSOCKNAME);
4497 case KEY_getsockopt:
4498 LOP(OP_GSOCKOPT,XTERM);
4520 yylval.ival = CopLINE(PL_curcop);
4524 LOP(OP_INDEX,XTERM);
4530 LOP(OP_IOCTL,XTERM);
4542 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4574 LOP(OP_LISTEN,XTERM);
4583 s = scan_pat(s,OP_MATCH);
4584 TERM(sublex_start());
4587 LOP(OP_MAPSTART, XREF);
4590 LOP(OP_MKDIR,XTERM);
4593 LOP(OP_MSGCTL,XTERM);
4596 LOP(OP_MSGGET,XTERM);
4599 LOP(OP_MSGRCV,XTERM);
4602 LOP(OP_MSGSND,XTERM);
4608 if (isIDFIRST_lazy_if(s,UTF)) {
4609 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4610 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4612 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4613 if (!PL_in_my_stash) {
4616 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4624 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4631 if (PL_expect != XSTATE)
4632 yyerror("\"no\" not allowed in expression");
4633 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4634 s = force_version(s);
4639 if (*s == '(' || (s = skipspace(s), *s == '('))
4646 if (isIDFIRST_lazy_if(s,UTF)) {
4648 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4650 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4651 Perl_warner(aTHX_ WARN_PRECEDENCE,
4652 "Precedence problem: open %.*s should be open(%.*s)",
4658 yylval.ival = OP_OR;
4668 LOP(OP_OPEN_DIR,XTERM);
4671 checkcomma(s,PL_tokenbuf,"filehandle");
4675 checkcomma(s,PL_tokenbuf,"filehandle");
4694 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4698 LOP(OP_PIPE_OP,XTERM);
4701 s = scan_str(s,FALSE,FALSE);
4703 missingterm((char*)0);
4704 yylval.ival = OP_CONST;
4705 TERM(sublex_start());
4711 s = scan_str(s,FALSE,FALSE);
4713 missingterm((char*)0);
4715 if (SvCUR(PL_lex_stuff)) {
4718 d = SvPV_force(PL_lex_stuff, len);
4721 for (; isSPACE(*d) && len; --len, ++d) ;
4724 if (!warned && ckWARN(WARN_QW)) {
4725 for (; !isSPACE(*d) && len; --len, ++d) {
4727 Perl_warner(aTHX_ WARN_QW,
4728 "Possible attempt to separate words with commas");
4731 else if (*d == '#') {
4732 Perl_warner(aTHX_ WARN_QW,
4733 "Possible attempt to put comments in qw() list");
4739 for (; !isSPACE(*d) && len; --len, ++d) ;
4741 sv = newSVpvn(b, d-b);
4742 if (DO_UTF8(PL_lex_stuff))
4744 words = append_elem(OP_LIST, words,
4745 newSVOP(OP_CONST, 0, tokeq(sv)));
4749 PL_nextval[PL_nexttoke].opval = words;
4754 SvREFCNT_dec(PL_lex_stuff);
4755 PL_lex_stuff = Nullsv;
4761 s = scan_str(s,FALSE,FALSE);
4763 missingterm((char*)0);
4764 yylval.ival = OP_STRINGIFY;
4765 if (SvIVX(PL_lex_stuff) == '\'')
4766 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4767 TERM(sublex_start());
4770 s = scan_pat(s,OP_QR);
4771 TERM(sublex_start());
4774 s = scan_str(s,FALSE,FALSE);
4776 missingterm((char*)0);
4777 yylval.ival = OP_BACKTICK;
4779 TERM(sublex_start());
4786 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4787 s = force_version(s);
4790 *PL_tokenbuf = '\0';
4791 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4792 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4793 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4795 yyerror("<> should be quotes");
4803 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4807 LOP(OP_RENAME,XTERM);
4816 LOP(OP_RINDEX,XTERM);
4839 LOP(OP_REVERSE,XTERM);
4850 TERM(sublex_start());
4852 TOKEN(1); /* force error */
4861 LOP(OP_SELECT,XTERM);
4867 LOP(OP_SEMCTL,XTERM);
4870 LOP(OP_SEMGET,XTERM);
4873 LOP(OP_SEMOP,XTERM);
4879 LOP(OP_SETPGRP,XTERM);
4881 case KEY_setpriority:
4882 LOP(OP_SETPRIORITY,XTERM);
4884 case KEY_sethostent:
4890 case KEY_setservent:
4893 case KEY_setprotoent:
4903 LOP(OP_SEEKDIR,XTERM);
4905 case KEY_setsockopt:
4906 LOP(OP_SSOCKOPT,XTERM);
4912 LOP(OP_SHMCTL,XTERM);
4915 LOP(OP_SHMGET,XTERM);
4918 LOP(OP_SHMREAD,XTERM);
4921 LOP(OP_SHMWRITE,XTERM);
4924 LOP(OP_SHUTDOWN,XTERM);
4933 LOP(OP_SOCKET,XTERM);
4935 case KEY_socketpair:
4936 LOP(OP_SOCKPAIR,XTERM);
4939 checkcomma(s,PL_tokenbuf,"subroutine name");
4941 if (*s == ';' || *s == ')') /* probably a close */
4942 Perl_croak(aTHX_ "sort is now a reserved word");
4944 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4948 LOP(OP_SPLIT,XTERM);
4951 LOP(OP_SPRINTF,XTERM);
4954 LOP(OP_SPLICE,XTERM);
4969 LOP(OP_SUBSTR,XTERM);
4975 char tmpbuf[sizeof PL_tokenbuf];
4977 expectation attrful;
4978 bool have_name, have_proto;
4983 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4984 (*s == ':' && s[1] == ':'))
4987 attrful = XATTRBLOCK;
4988 /* remember buffer pos'n for later force_word */
4989 tboffset = s - PL_oldbufptr;
4990 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4991 if (strchr(tmpbuf, ':'))
4992 sv_setpv(PL_subname, tmpbuf);
4994 sv_setsv(PL_subname,PL_curstname);
4995 sv_catpvn(PL_subname,"::",2);
4996 sv_catpvn(PL_subname,tmpbuf,len);
5003 Perl_croak(aTHX_ "Missing name in \"my sub\"");
5004 PL_expect = XTERMBLOCK;
5005 attrful = XATTRTERM;
5006 sv_setpv(PL_subname,"?");
5010 if (key == KEY_format) {
5012 PL_lex_formbrack = PL_lex_brackets + 1;
5014 (void) force_word(PL_oldbufptr + tboffset, WORD,
5019 /* Look for a prototype */
5023 s = scan_str(s,FALSE,FALSE);
5025 Perl_croak(aTHX_ "Prototype not terminated");
5027 d = SvPVX(PL_lex_stuff);
5029 for (p = d; *p; ++p) {
5034 SvCUR(PL_lex_stuff) = tmp;
5042 if (*s == ':' && s[1] != ':')
5043 PL_expect = attrful;
5046 PL_nextval[PL_nexttoke].opval =
5047 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
5048 PL_lex_stuff = Nullsv;
5052 sv_setpv(PL_subname,"__ANON__");
5055 (void) force_word(PL_oldbufptr + tboffset, WORD,
5064 LOP(OP_SYSTEM,XREF);
5067 LOP(OP_SYMLINK,XTERM);
5070 LOP(OP_SYSCALL,XTERM);
5073 LOP(OP_SYSOPEN,XTERM);
5076 LOP(OP_SYSSEEK,XTERM);
5079 LOP(OP_SYSREAD,XTERM);
5082 LOP(OP_SYSWRITE,XTERM);
5086 TERM(sublex_start());
5107 LOP(OP_TRUNCATE,XTERM);
5119 yylval.ival = CopLINE(PL_curcop);
5123 yylval.ival = CopLINE(PL_curcop);
5127 LOP(OP_UNLINK,XTERM);
5133 LOP(OP_UNPACK,XTERM);
5136 LOP(OP_UTIME,XTERM);
5139 if (ckWARN(WARN_UMASK)) {
5140 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
5141 if (*d != '0' && isDIGIT(*d))
5142 Perl_warner(aTHX_ WARN_UMASK,
5143 "umask: argument is missing initial 0");
5148 LOP(OP_UNSHIFT,XTERM);
5151 if (PL_expect != XSTATE)
5152 yyerror("\"use\" not allowed in expression");
5154 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
5155 s = force_version(s);
5156 if (*s == ';' || (s = skipspace(s), *s == ';')) {
5157 PL_nextval[PL_nexttoke].opval = Nullop;
5162 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5163 s = force_version(s);
5175 yylval.ival = CopLINE(PL_curcop);
5179 PL_hints |= HINT_BLOCK_SCOPE;
5186 LOP(OP_WAITPID,XTERM);
5194 static char ctl_l[2];
5196 if (ctl_l[0] == '\0')
5197 ctl_l[0] = toCTRL('L');
5198 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5201 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5206 if (PL_expect == XOPERATOR)
5212 yylval.ival = OP_XOR;
5217 TERM(sublex_start());
5222 #pragma segment Main
5226 Perl_keyword(pTHX_ register char *d, I32 len)
5231 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5232 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5233 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5234 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5235 if (strEQ(d,"__END__")) return KEY___END__;
5239 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5244 if (strEQ(d,"and")) return -KEY_and;
5245 if (strEQ(d,"abs")) return -KEY_abs;
5248 if (strEQ(d,"alarm")) return -KEY_alarm;
5249 if (strEQ(d,"atan2")) return -KEY_atan2;
5252 if (strEQ(d,"accept")) return -KEY_accept;
5257 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5260 if (strEQ(d,"bless")) return -KEY_bless;
5261 if (strEQ(d,"bind")) return -KEY_bind;
5262 if (strEQ(d,"binmode")) return -KEY_binmode;
5265 if (strEQ(d,"CORE")) return -KEY_CORE;
5266 if (strEQ(d,"CHECK")) return KEY_CHECK;
5271 if (strEQ(d,"cmp")) return -KEY_cmp;
5272 if (strEQ(d,"chr")) return -KEY_chr;
5273 if (strEQ(d,"cos")) return -KEY_cos;
5276 if (strEQ(d,"chop")) return -KEY_chop;
5279 if (strEQ(d,"close")) return -KEY_close;
5280 if (strEQ(d,"chdir")) return -KEY_chdir;
5281 if (strEQ(d,"chomp")) return -KEY_chomp;
5282 if (strEQ(d,"chmod")) return -KEY_chmod;
5283 if (strEQ(d,"chown")) return -KEY_chown;
5284 if (strEQ(d,"crypt")) return -KEY_crypt;
5287 if (strEQ(d,"chroot")) return -KEY_chroot;
5288 if (strEQ(d,"caller")) return -KEY_caller;
5291 if (strEQ(d,"connect")) return -KEY_connect;
5294 if (strEQ(d,"closedir")) return -KEY_closedir;
5295 if (strEQ(d,"continue")) return -KEY_continue;
5300 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5305 if (strEQ(d,"do")) return KEY_do;
5308 if (strEQ(d,"die")) return -KEY_die;
5311 if (strEQ(d,"dump")) return -KEY_dump;
5314 if (strEQ(d,"delete")) return KEY_delete;
5317 if (strEQ(d,"defined")) return KEY_defined;
5318 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5321 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5326 if (strEQ(d,"END")) return KEY_END;
5331 if (strEQ(d,"eq")) return -KEY_eq;
5334 if (strEQ(d,"eof")) return -KEY_eof;
5335 if (strEQ(d,"exp")) return -KEY_exp;
5338 if (strEQ(d,"else")) return KEY_else;
5339 if (strEQ(d,"exit")) return -KEY_exit;
5340 if (strEQ(d,"eval")) return KEY_eval;
5341 if (strEQ(d,"exec")) return -KEY_exec;
5342 if (strEQ(d,"each")) return -KEY_each;
5345 if (strEQ(d,"elsif")) return KEY_elsif;
5348 if (strEQ(d,"exists")) return KEY_exists;
5349 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5352 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5353 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5356 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5359 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5360 if (strEQ(d,"endservent")) return -KEY_endservent;
5363 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5370 if (strEQ(d,"for")) return KEY_for;
5373 if (strEQ(d,"fork")) return -KEY_fork;
5376 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5377 if (strEQ(d,"flock")) return -KEY_flock;
5380 if (strEQ(d,"format")) return KEY_format;
5381 if (strEQ(d,"fileno")) return -KEY_fileno;
5384 if (strEQ(d,"foreach")) return KEY_foreach;
5387 if (strEQ(d,"formline")) return -KEY_formline;
5392 if (strnEQ(d,"get",3)) {
5397 if (strEQ(d,"ppid")) return -KEY_getppid;
5398 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5401 if (strEQ(d,"pwent")) return -KEY_getpwent;
5402 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5403 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5406 if (strEQ(d,"peername")) return -KEY_getpeername;
5407 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5408 if (strEQ(d,"priority")) return -KEY_getpriority;
5411 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5414 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5418 else if (*d == 'h') {
5419 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5420 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5421 if (strEQ(d,"hostent")) return -KEY_gethostent;
5423 else if (*d == 'n') {
5424 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5425 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5426 if (strEQ(d,"netent")) return -KEY_getnetent;
5428 else if (*d == 's') {
5429 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5430 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5431 if (strEQ(d,"servent")) return -KEY_getservent;
5432 if (strEQ(d,"sockname")) return -KEY_getsockname;
5433 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5435 else if (*d == 'g') {
5436 if (strEQ(d,"grent")) return -KEY_getgrent;
5437 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5438 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5440 else if (*d == 'l') {
5441 if (strEQ(d,"login")) return -KEY_getlogin;
5443 else if (strEQ(d,"c")) return -KEY_getc;
5448 if (strEQ(d,"gt")) return -KEY_gt;
5449 if (strEQ(d,"ge")) return -KEY_ge;
5452 if (strEQ(d,"grep")) return KEY_grep;
5453 if (strEQ(d,"goto")) return KEY_goto;
5454 if (strEQ(d,"glob")) return KEY_glob;
5457 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5462 if (strEQ(d,"hex")) return -KEY_hex;
5465 if (strEQ(d,"INIT")) return KEY_INIT;
5470 if (strEQ(d,"if")) return KEY_if;
5473 if (strEQ(d,"int")) return -KEY_int;
5476 if (strEQ(d,"index")) return -KEY_index;
5477 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5482 if (strEQ(d,"join")) return -KEY_join;
5486 if (strEQ(d,"keys")) return -KEY_keys;
5487 if (strEQ(d,"kill")) return -KEY_kill;
5493 if (strEQ(d,"lt")) return -KEY_lt;
5494 if (strEQ(d,"le")) return -KEY_le;
5495 if (strEQ(d,"lc")) return -KEY_lc;
5498 if (strEQ(d,"log")) return -KEY_log;
5501 if (strEQ(d,"last")) return KEY_last;
5502 if (strEQ(d,"link")) return -KEY_link;
5503 if (strEQ(d,"lock")) return -KEY_lock;
5506 if (strEQ(d,"local")) return KEY_local;
5507 if (strEQ(d,"lstat")) return -KEY_lstat;
5510 if (strEQ(d,"length")) return -KEY_length;
5511 if (strEQ(d,"listen")) return -KEY_listen;
5514 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5517 if (strEQ(d,"localtime")) return -KEY_localtime;
5523 case 1: return KEY_m;
5525 if (strEQ(d,"my")) return KEY_my;
5528 if (strEQ(d,"map")) return KEY_map;
5531 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5534 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5535 if (strEQ(d,"msgget")) return -KEY_msgget;
5536 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5537 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5542 if (strEQ(d,"next")) return KEY_next;
5543 if (strEQ(d,"ne")) return -KEY_ne;
5544 if (strEQ(d,"not")) return -KEY_not;
5545 if (strEQ(d,"no")) return KEY_no;
5550 if (strEQ(d,"or")) return -KEY_or;
5553 if (strEQ(d,"ord")) return -KEY_ord;
5554 if (strEQ(d,"oct")) return -KEY_oct;
5555 if (strEQ(d,"our")) return KEY_our;
5558 if (strEQ(d,"open")) return -KEY_open;
5561 if (strEQ(d,"opendir")) return -KEY_opendir;
5568 if (strEQ(d,"pop")) return -KEY_pop;
5569 if (strEQ(d,"pos")) return KEY_pos;
5572 if (strEQ(d,"push")) return -KEY_push;
5573 if (strEQ(d,"pack")) return -KEY_pack;
5574 if (strEQ(d,"pipe")) return -KEY_pipe;
5577 if (strEQ(d,"print")) return KEY_print;
5580 if (strEQ(d,"printf")) return KEY_printf;
5583 if (strEQ(d,"package")) return KEY_package;
5586 if (strEQ(d,"prototype")) return KEY_prototype;
5591 if (strEQ(d,"q")) return KEY_q;
5592 if (strEQ(d,"qr")) return KEY_qr;
5593 if (strEQ(d,"qq")) return KEY_qq;
5594 if (strEQ(d,"qw")) return KEY_qw;
5595 if (strEQ(d,"qx")) return KEY_qx;
5597 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5602 if (strEQ(d,"ref")) return -KEY_ref;
5605 if (strEQ(d,"read")) return -KEY_read;
5606 if (strEQ(d,"rand")) return -KEY_rand;
5607 if (strEQ(d,"recv")) return -KEY_recv;
5608 if (strEQ(d,"redo")) return KEY_redo;
5611 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5612 if (strEQ(d,"reset")) return -KEY_reset;
5615 if (strEQ(d,"return")) return KEY_return;
5616 if (strEQ(d,"rename")) return -KEY_rename;
5617 if (strEQ(d,"rindex")) return -KEY_rindex;
5620 if (strEQ(d,"require")) return -KEY_require;
5621 if (strEQ(d,"reverse")) return -KEY_reverse;
5622 if (strEQ(d,"readdir")) return -KEY_readdir;
5625 if (strEQ(d,"readlink")) return -KEY_readlink;
5626 if (strEQ(d,"readline")) return -KEY_readline;
5627 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5630 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5636 case 0: return KEY_s;
5638 if (strEQ(d,"scalar")) return KEY_scalar;
5643 if (strEQ(d,"seek")) return -KEY_seek;
5644 if (strEQ(d,"send")) return -KEY_send;
5647 if (strEQ(d,"semop")) return -KEY_semop;
5650 if (strEQ(d,"select")) return -KEY_select;
5651 if (strEQ(d,"semctl")) return -KEY_semctl;
5652 if (strEQ(d,"semget")) return -KEY_semget;
5655 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5656 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5659 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5660 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5663 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5666 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5667 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5668 if (strEQ(d,"setservent")) return -KEY_setservent;
5671 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5672 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5679 if (strEQ(d,"shift")) return -KEY_shift;
5682 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5683 if (strEQ(d,"shmget")) return -KEY_shmget;
5686 if (strEQ(d,"shmread")) return -KEY_shmread;
5689 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5690 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5695 if (strEQ(d,"sin")) return -KEY_sin;
5698 if (strEQ(d,"sleep")) return -KEY_sleep;
5701 if (strEQ(d,"sort")) return KEY_sort;
5702 if (strEQ(d,"socket")) return -KEY_socket;
5703 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5706 if (strEQ(d,"split")) return KEY_split;
5707 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5708 if (strEQ(d,"splice")) return -KEY_splice;
5711 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5714 if (strEQ(d,"srand")) return -KEY_srand;
5717 if (strEQ(d,"stat")) return -KEY_stat;
5718 if (strEQ(d,"study")) return KEY_study;
5721 if (strEQ(d,"substr")) return -KEY_substr;
5722 if (strEQ(d,"sub")) return KEY_sub;
5727 if (strEQ(d,"system")) return -KEY_system;
5730 if (strEQ(d,"symlink")) return -KEY_symlink;
5731 if (strEQ(d,"syscall")) return -KEY_syscall;
5732 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5733 if (strEQ(d,"sysread")) return -KEY_sysread;
5734 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5737 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5746 if (strEQ(d,"tr")) return KEY_tr;
5749 if (strEQ(d,"tie")) return KEY_tie;
5752 if (strEQ(d,"tell")) return -KEY_tell;
5753 if (strEQ(d,"tied")) return KEY_tied;
5754 if (strEQ(d,"time")) return -KEY_time;
5757 if (strEQ(d,"times")) return -KEY_times;
5760 if (strEQ(d,"telldir")) return -KEY_telldir;
5763 if (strEQ(d,"truncate")) return -KEY_truncate;
5770 if (strEQ(d,"uc")) return -KEY_uc;
5773 if (strEQ(d,"use")) return KEY_use;
5776 if (strEQ(d,"undef")) return KEY_undef;
5777 if (strEQ(d,"until")) return KEY_until;
5778 if (strEQ(d,"untie")) return KEY_untie;
5779 if (strEQ(d,"utime")) return -KEY_utime;
5780 if (strEQ(d,"umask")) return -KEY_umask;
5783 if (strEQ(d,"unless")) return KEY_unless;
5784 if (strEQ(d,"unpack")) return -KEY_unpack;
5785 if (strEQ(d,"unlink")) return -KEY_unlink;
5788 if (strEQ(d,"unshift")) return -KEY_unshift;
5789 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5794 if (strEQ(d,"values")) return -KEY_values;
5795 if (strEQ(d,"vec")) return -KEY_vec;
5800 if (strEQ(d,"warn")) return -KEY_warn;
5801 if (strEQ(d,"wait")) return -KEY_wait;
5804 if (strEQ(d,"while")) return KEY_while;
5805 if (strEQ(d,"write")) return -KEY_write;
5808 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5811 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5816 if (len == 1) return -KEY_x;
5817 if (strEQ(d,"xor")) return -KEY_xor;
5820 if (len == 1) return KEY_y;
5829 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5833 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5834 if (ckWARN(WARN_SYNTAX)) {
5836 for (w = s+2; *w && level; w++) {
5843 for (; *w && isSPACE(*w); w++) ;
5844 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5845 Perl_warner(aTHX_ WARN_SYNTAX,
5846 "%s (...) interpreted as function",name);
5849 while (s < PL_bufend && isSPACE(*s))
5853 while (s < PL_bufend && isSPACE(*s))
5855 if (isIDFIRST_lazy_if(s,UTF)) {
5857 while (isALNUM_lazy_if(s,UTF))
5859 while (s < PL_bufend && isSPACE(*s))
5864 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5868 Perl_croak(aTHX_ "No comma allowed after %s", what);
5873 /* Either returns sv, or mortalizes sv and returns a new SV*.
5874 Best used as sv=new_constant(..., sv, ...).
5875 If s, pv are NULL, calls subroutine with one argument,
5876 and type is used with error messages only. */
5879 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5883 HV *table = GvHV(PL_hintgv); /* ^H */
5887 const char *why1, *why2, *why3;
5889 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5892 why2 = strEQ(key,"charnames")
5893 ? "(possibly a missing \"use charnames ...\")"
5895 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
5896 (type ? type: "undef"), why2);
5898 /* This is convoluted and evil ("goto considered harmful")
5899 * but I do not understand the intricacies of all the different
5900 * failure modes of %^H in here. The goal here is to make
5901 * the most probable error message user-friendly. --jhi */
5906 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
5907 (type ? type: "undef"), why1, why2, why3);
5909 yyerror(SvPVX(msg));
5913 cvp = hv_fetch(table, key, strlen(key), FALSE);
5914 if (!cvp || !SvOK(*cvp)) {
5917 why3 = "} is not defined";
5920 sv_2mortal(sv); /* Parent created it permanently */
5923 pv = sv_2mortal(newSVpvn(s, len));
5925 typesv = sv_2mortal(newSVpv(type, 0));
5927 typesv = &PL_sv_undef;
5929 PUSHSTACKi(PERLSI_OVERLOAD);
5941 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5945 /* Check the eval first */
5946 if (!PL_in_eval && SvTRUE(ERRSV)) {
5948 sv_catpv(ERRSV, "Propagated");
5949 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5951 res = SvREFCNT_inc(sv);
5955 (void)SvREFCNT_inc(res);
5964 why1 = "Call to &{$^H{";
5966 why3 = "}} did not return a defined value";
5975 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5977 register char *d = dest;
5978 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5981 Perl_croak(aTHX_ ident_too_long);
5982 if (isALNUM(*s)) /* UTF handled below */
5984 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5989 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5993 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
5994 char *t = s + UTF8SKIP(s);
5995 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
5997 if (d + (t - s) > e)
5998 Perl_croak(aTHX_ ident_too_long);
5999 Copy(s, d, t - s, char);
6012 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
6022 e = d + destlen - 3; /* two-character token, ending NUL */
6024 while (isDIGIT(*s)) {
6026 Perl_croak(aTHX_ ident_too_long);
6033 Perl_croak(aTHX_ ident_too_long);
6034 if (isALNUM(*s)) /* UTF handled below */
6036 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
6041 else if (*s == ':' && s[1] == ':') {
6045 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6046 char *t = s + UTF8SKIP(s);
6047 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6049 if (d + (t - s) > e)
6050 Perl_croak(aTHX_ ident_too_long);
6051 Copy(s, d, t - s, char);
6062 if (PL_lex_state != LEX_NORMAL)
6063 PL_lex_state = LEX_INTERPENDMAYBE;
6066 if (*s == '$' && s[1] &&
6067 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
6080 if (*d == '^' && *s && isCONTROLVAR(*s)) {
6085 if (isSPACE(s[-1])) {
6088 if (!SPACE_OR_TAB(ch)) {
6094 if (isIDFIRST_lazy_if(d,UTF)) {
6098 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
6100 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
6103 Copy(s, d, e - s, char);
6108 while ((isALNUM(*s) || *s == ':') && d < e)
6111 Perl_croak(aTHX_ ident_too_long);
6114 while (s < send && SPACE_OR_TAB(*s)) s++;
6115 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
6116 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
6117 const char *brack = *s == '[' ? "[...]" : "{...}";
6118 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6119 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
6120 funny, dest, brack, funny, dest, brack);
6123 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
6127 /* Handle extended ${^Foo} variables
6128 * 1999-02-27 mjd-perl-patch@plover.com */
6129 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6133 while (isALNUM(*s) && d < e) {
6137 Perl_croak(aTHX_ ident_too_long);
6142 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6143 PL_lex_state = LEX_INTERPEND;
6146 if (PL_lex_state == LEX_NORMAL) {
6147 if (ckWARN(WARN_AMBIGUOUS) &&
6148 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
6150 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6151 "Ambiguous use of %c{%s} resolved to %c%s",
6152 funny, dest, funny, dest);
6157 s = bracket; /* let the parser handle it */
6161 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6162 PL_lex_state = LEX_INTERPEND;
6167 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
6172 *pmfl |= PMf_GLOBAL;
6174 *pmfl |= PMf_CONTINUE;
6178 *pmfl |= PMf_MULTILINE;
6180 *pmfl |= PMf_SINGLELINE;
6182 *pmfl |= PMf_EXTENDED;
6186 S_scan_pat(pTHX_ char *start, I32 type)
6191 s = scan_str(start,FALSE,FALSE);
6193 Perl_croak(aTHX_ "Search pattern not terminated");
6195 pm = (PMOP*)newPMOP(type, 0);
6196 if (PL_multi_open == '?')
6197 pm->op_pmflags |= PMf_ONCE;
6199 while (*s && strchr("iomsx", *s))
6200 pmflag(&pm->op_pmflags,*s++);
6203 while (*s && strchr("iogcmsx", *s))
6204 pmflag(&pm->op_pmflags,*s++);
6206 pm->op_pmpermflags = pm->op_pmflags;
6208 PL_lex_op = (OP*)pm;
6209 yylval.ival = OP_MATCH;
6214 S_scan_subst(pTHX_ char *start)
6221 yylval.ival = OP_NULL;
6223 s = scan_str(start,FALSE,FALSE);
6226 Perl_croak(aTHX_ "Substitution pattern not terminated");
6228 if (s[-1] == PL_multi_open)
6231 first_start = PL_multi_start;
6232 s = scan_str(s,FALSE,FALSE);
6235 SvREFCNT_dec(PL_lex_stuff);
6236 PL_lex_stuff = Nullsv;
6238 Perl_croak(aTHX_ "Substitution replacement not terminated");
6240 PL_multi_start = first_start; /* so whole substitution is taken together */
6242 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6248 else if (strchr("iogcmsx", *s))
6249 pmflag(&pm->op_pmflags,*s++);
6256 PL_sublex_info.super_bufptr = s;
6257 PL_sublex_info.super_bufend = PL_bufend;
6259 pm->op_pmflags |= PMf_EVAL;
6260 repl = newSVpvn("",0);
6262 sv_catpv(repl, es ? "eval " : "do ");
6263 sv_catpvn(repl, "{ ", 2);
6264 sv_catsv(repl, PL_lex_repl);
6265 sv_catpvn(repl, " };", 2);
6267 SvREFCNT_dec(PL_lex_repl);
6271 pm->op_pmpermflags = pm->op_pmflags;
6272 PL_lex_op = (OP*)pm;
6273 yylval.ival = OP_SUBST;
6278 S_scan_trans(pTHX_ char *start)
6287 yylval.ival = OP_NULL;
6289 s = scan_str(start,FALSE,FALSE);
6291 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6292 if (s[-1] == PL_multi_open)
6295 s = scan_str(s,FALSE,FALSE);
6298 SvREFCNT_dec(PL_lex_stuff);
6299 PL_lex_stuff = Nullsv;
6301 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6304 complement = del = squash = 0;
6305 while (strchr("cds", *s)) {
6307 complement = OPpTRANS_COMPLEMENT;
6309 del = OPpTRANS_DELETE;
6311 squash = OPpTRANS_SQUASH;
6315 New(803, tbl, complement&&!del?258:256, short);
6316 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6317 o->op_private = del|squash|complement|
6318 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6319 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
6322 yylval.ival = OP_TRANS;
6327 S_scan_heredoc(pTHX_ register char *s)
6330 I32 op_type = OP_SCALAR;
6337 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6341 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6344 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6345 if (*peek && strchr("`'\"",*peek)) {
6348 s = delimcpy(d, e, s, PL_bufend, term, &len);
6358 if (!isALNUM_lazy_if(s,UTF))
6359 deprecate("bare << to mean <<\"\"");
6360 for (; isALNUM_lazy_if(s,UTF); s++) {
6365 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6366 Perl_croak(aTHX_ "Delimiter for here document is too long");
6369 len = d - PL_tokenbuf;
6370 #ifndef PERL_STRICT_CR
6371 d = strchr(s, '\r');
6375 while (s < PL_bufend) {
6381 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6390 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6395 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6396 herewas = newSVpvn(s,PL_bufend-s);
6398 s--, herewas = newSVpvn(s,d-s);
6399 s += SvCUR(herewas);
6401 tmpstr = NEWSV(87,79);
6402 sv_upgrade(tmpstr, SVt_PVIV);
6407 else if (term == '`') {
6408 op_type = OP_BACKTICK;
6409 SvIVX(tmpstr) = '\\';
6413 PL_multi_start = CopLINE(PL_curcop);
6414 PL_multi_open = PL_multi_close = '<';
6415 term = *PL_tokenbuf;
6416 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6417 char *bufptr = PL_sublex_info.super_bufptr;
6418 char *bufend = PL_sublex_info.super_bufend;
6419 char *olds = s - SvCUR(herewas);
6420 s = strchr(bufptr, '\n');
6424 while (s < bufend &&
6425 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6427 CopLINE_inc(PL_curcop);
6430 CopLINE_set(PL_curcop, PL_multi_start);
6431 missingterm(PL_tokenbuf);
6433 sv_setpvn(herewas,bufptr,d-bufptr+1);
6434 sv_setpvn(tmpstr,d+1,s-d);
6436 sv_catpvn(herewas,s,bufend-s);
6437 (void)strcpy(bufptr,SvPVX(herewas));
6444 while (s < PL_bufend &&
6445 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6447 CopLINE_inc(PL_curcop);
6449 if (s >= PL_bufend) {
6450 CopLINE_set(PL_curcop, PL_multi_start);
6451 missingterm(PL_tokenbuf);
6453 sv_setpvn(tmpstr,d+1,s-d);
6455 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6457 sv_catpvn(herewas,s,PL_bufend-s);
6458 sv_setsv(PL_linestr,herewas);
6459 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6460 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6461 PL_last_lop = PL_last_uni = Nullch;
6464 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6465 while (s >= PL_bufend) { /* multiple line string? */
6467 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6468 CopLINE_set(PL_curcop, PL_multi_start);
6469 missingterm(PL_tokenbuf);
6471 CopLINE_inc(PL_curcop);
6472 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6473 PL_last_lop = PL_last_uni = Nullch;
6474 #ifndef PERL_STRICT_CR
6475 if (PL_bufend - PL_linestart >= 2) {
6476 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6477 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6479 PL_bufend[-2] = '\n';
6481 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6483 else if (PL_bufend[-1] == '\r')
6484 PL_bufend[-1] = '\n';
6486 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6487 PL_bufend[-1] = '\n';
6489 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6490 SV *sv = NEWSV(88,0);
6492 sv_upgrade(sv, SVt_PVMG);
6493 sv_setsv(sv,PL_linestr);
6494 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6496 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6499 sv_catsv(PL_linestr,herewas);
6500 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6504 sv_catsv(tmpstr,PL_linestr);
6509 PL_multi_end = CopLINE(PL_curcop);
6510 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6511 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6512 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6514 SvREFCNT_dec(herewas);
6515 if (UTF && !IN_BYTE && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
6517 PL_lex_stuff = tmpstr;
6518 yylval.ival = op_type;
6523 takes: current position in input buffer
6524 returns: new position in input buffer
6525 side-effects: yylval and lex_op are set.
6530 <FH> read from filehandle
6531 <pkg::FH> read from package qualified filehandle
6532 <pkg'FH> read from package qualified filehandle
6533 <$fh> read from filehandle in $fh
6539 S_scan_inputsymbol(pTHX_ char *start)
6541 register char *s = start; /* current position in buffer */
6547 d = PL_tokenbuf; /* start of temp holding space */
6548 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6549 end = strchr(s, '\n');
6552 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6554 /* die if we didn't have space for the contents of the <>,
6555 or if it didn't end, or if we see a newline
6558 if (len >= sizeof PL_tokenbuf)
6559 Perl_croak(aTHX_ "Excessively long <> operator");
6561 Perl_croak(aTHX_ "Unterminated <> operator");
6566 Remember, only scalar variables are interpreted as filehandles by
6567 this code. Anything more complex (e.g., <$fh{$num}>) will be
6568 treated as a glob() call.
6569 This code makes use of the fact that except for the $ at the front,
6570 a scalar variable and a filehandle look the same.
6572 if (*d == '$' && d[1]) d++;
6574 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6575 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6578 /* If we've tried to read what we allow filehandles to look like, and
6579 there's still text left, then it must be a glob() and not a getline.
6580 Use scan_str to pull out the stuff between the <> and treat it
6581 as nothing more than a string.
6584 if (d - PL_tokenbuf != len) {
6585 yylval.ival = OP_GLOB;
6587 s = scan_str(start,FALSE,FALSE);
6589 Perl_croak(aTHX_ "Glob not terminated");
6593 /* we're in a filehandle read situation */
6596 /* turn <> into <ARGV> */
6598 (void)strcpy(d,"ARGV");
6600 /* if <$fh>, create the ops to turn the variable into a
6606 /* try to find it in the pad for this block, otherwise find
6607 add symbol table ops
6609 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6610 OP *o = newOP(OP_PADSV, 0);
6612 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6615 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6616 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6617 newUNOP(OP_RV2SV, 0,
6618 newGVOP(OP_GV, 0, gv)));
6620 PL_lex_op->op_flags |= OPf_SPECIAL;
6621 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6622 yylval.ival = OP_NULL;
6625 /* If it's none of the above, it must be a literal filehandle
6626 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6628 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6629 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6630 yylval.ival = OP_NULL;
6639 takes: start position in buffer
6640 keep_quoted preserve \ on the embedded delimiter(s)
6641 keep_delims preserve the delimiters around the string
6642 returns: position to continue reading from buffer
6643 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6644 updates the read buffer.
6646 This subroutine pulls a string out of the input. It is called for:
6647 q single quotes q(literal text)
6648 ' single quotes 'literal text'
6649 qq double quotes qq(interpolate $here please)
6650 " double quotes "interpolate $here please"
6651 qx backticks qx(/bin/ls -l)
6652 ` backticks `/bin/ls -l`
6653 qw quote words @EXPORT_OK = qw( func() $spam )
6654 m// regexp match m/this/
6655 s/// regexp substitute s/this/that/
6656 tr/// string transliterate tr/this/that/
6657 y/// string transliterate y/this/that/
6658 ($*@) sub prototypes sub foo ($)
6659 (stuff) sub attr parameters sub foo : attr(stuff)
6660 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6662 In most of these cases (all but <>, patterns and transliterate)
6663 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6664 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6665 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6668 It skips whitespace before the string starts, and treats the first
6669 character as the delimiter. If the delimiter is one of ([{< then
6670 the corresponding "close" character )]}> is used as the closing
6671 delimiter. It allows quoting of delimiters, and if the string has
6672 balanced delimiters ([{<>}]) it allows nesting.
6674 On success, the SV with the resulting string is put into lex_stuff or,
6675 if that is already non-NULL, into lex_repl. The second case occurs only
6676 when parsing the RHS of the special constructs s/// and tr/// (y///).
6677 For convenience, the terminating delimiter character is stuffed into
6682 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6684 SV *sv; /* scalar value: string */
6685 char *tmps; /* temp string, used for delimiter matching */
6686 register char *s = start; /* current position in the buffer */
6687 register char term; /* terminating character */
6688 register char *to; /* current position in the sv's data */
6689 I32 brackets = 1; /* bracket nesting level */
6690 bool has_utf8 = FALSE; /* is there any utf8 content? */
6692 /* skip space before the delimiter */
6696 /* mark where we are, in case we need to report errors */
6699 /* after skipping whitespace, the next character is the terminator */
6701 if (UTF8_IS_CONTINUED(term) && UTF)
6704 /* mark where we are */
6705 PL_multi_start = CopLINE(PL_curcop);
6706 PL_multi_open = term;
6708 /* find corresponding closing delimiter */
6709 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6711 PL_multi_close = term;
6713 /* create a new SV to hold the contents. 87 is leak category, I'm
6714 assuming. 79 is the SV's initial length. What a random number. */
6716 sv_upgrade(sv, SVt_PVIV);
6718 (void)SvPOK_only(sv); /* validate pointer */
6720 /* move past delimiter and try to read a complete string */
6722 sv_catpvn(sv, s, 1);
6725 /* extend sv if need be */
6726 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6727 /* set 'to' to the next character in the sv's string */
6728 to = SvPVX(sv)+SvCUR(sv);
6730 /* if open delimiter is the close delimiter read unbridle */
6731 if (PL_multi_open == PL_multi_close) {
6732 for (; s < PL_bufend; s++,to++) {
6733 /* embedded newlines increment the current line number */
6734 if (*s == '\n' && !PL_rsfp)
6735 CopLINE_inc(PL_curcop);
6736 /* handle quoted delimiters */
6737 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6738 if (!keep_quoted && s[1] == term)
6740 /* any other quotes are simply copied straight through */
6744 /* terminate when run out of buffer (the for() condition), or
6745 have found the terminator */
6746 else if (*s == term)
6748 else if (!has_utf8 && UTF8_IS_CONTINUED(*s) && UTF)
6754 /* if the terminator isn't the same as the start character (e.g.,
6755 matched brackets), we have to allow more in the quoting, and
6756 be prepared for nested brackets.
6759 /* read until we run out of string, or we find the terminator */
6760 for (; s < PL_bufend; s++,to++) {
6761 /* embedded newlines increment the line count */
6762 if (*s == '\n' && !PL_rsfp)
6763 CopLINE_inc(PL_curcop);
6764 /* backslashes can escape the open or closing characters */
6765 if (*s == '\\' && s+1 < PL_bufend) {
6767 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6772 /* allow nested opens and closes */
6773 else if (*s == PL_multi_close && --brackets <= 0)
6775 else if (*s == PL_multi_open)
6777 else if (!has_utf8 && UTF8_IS_CONTINUED(*s) && UTF)
6782 /* terminate the copied string and update the sv's end-of-string */
6784 SvCUR_set(sv, to - SvPVX(sv));
6787 * this next chunk reads more into the buffer if we're not done yet
6791 break; /* handle case where we are done yet :-) */
6793 #ifndef PERL_STRICT_CR
6794 if (to - SvPVX(sv) >= 2) {
6795 if ((to[-2] == '\r' && to[-1] == '\n') ||
6796 (to[-2] == '\n' && to[-1] == '\r'))
6800 SvCUR_set(sv, to - SvPVX(sv));
6802 else if (to[-1] == '\r')
6805 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6809 /* if we're out of file, or a read fails, bail and reset the current
6810 line marker so we can report where the unterminated string began
6813 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6815 CopLINE_set(PL_curcop, PL_multi_start);
6818 /* we read a line, so increment our line counter */
6819 CopLINE_inc(PL_curcop);
6821 /* update debugger info */
6822 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6823 SV *sv = NEWSV(88,0);
6825 sv_upgrade(sv, SVt_PVMG);
6826 sv_setsv(sv,PL_linestr);
6827 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6830 /* having changed the buffer, we must update PL_bufend */
6831 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6832 PL_last_lop = PL_last_uni = Nullch;
6835 /* at this point, we have successfully read the delimited string */
6838 sv_catpvn(sv, s, 1);
6841 PL_multi_end = CopLINE(PL_curcop);
6844 /* if we allocated too much space, give some back */
6845 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6846 SvLEN_set(sv, SvCUR(sv) + 1);
6847 Renew(SvPVX(sv), SvLEN(sv), char);
6850 /* decide whether this is the first or second quoted string we've read
6863 takes: pointer to position in buffer
6864 returns: pointer to new position in buffer
6865 side-effects: builds ops for the constant in yylval.op
6867 Read a number in any of the formats that Perl accepts:
6869 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6870 [\d_]+(\.[\d_]*)?[Ee](\d+)
6872 Underbars (_) are allowed in decimal numbers. If -w is on,
6873 underbars before a decimal point must be at three digit intervals.
6875 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6878 If it reads a number without a decimal point or an exponent, it will
6879 try converting the number to an integer and see if it can do so
6880 without loss of precision.
6884 Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
6886 register char *s = start; /* current position in buffer */
6887 register char *d; /* destination in temp buffer */
6888 register char *e; /* end of temp buffer */
6889 NV nv; /* number read, as a double */
6890 SV *sv = Nullsv; /* place to put the converted number */
6891 bool floatit; /* boolean: int or float? */
6892 char *lastub = 0; /* position of last underbar */
6893 static char number_too_long[] = "Number too long";
6895 /* We use the first character to decide what type of number this is */
6899 Perl_croak(aTHX_ "panic: scan_num");
6901 /* if it starts with a 0, it could be an octal number, a decimal in
6902 0.13 disguise, or a hexadecimal number, or a binary number. */
6906 u holds the "number so far"
6907 shift the power of 2 of the base
6908 (hex == 4, octal == 3, binary == 1)
6909 overflowed was the number more than we can hold?
6911 Shift is used when we add a digit. It also serves as an "are
6912 we in octal/hex/binary?" indicator to disallow hex characters
6918 bool overflowed = FALSE;
6919 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6920 static char* bases[5] = { "", "binary", "", "octal",
6922 static char* Bases[5] = { "", "Binary", "", "Octal",
6924 static char *maxima[5] = { "",
6925 "0b11111111111111111111111111111111",
6929 char *base, *Base, *max;
6935 } else if (s[1] == 'b') {
6939 /* check for a decimal in disguise */
6940 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6942 /* so it must be octal */
6946 base = bases[shift];
6947 Base = Bases[shift];
6948 max = maxima[shift];
6950 /* read the rest of the number */
6952 /* x is used in the overflow test,
6953 b is the digit we're adding on. */
6958 /* if we don't mention it, we're done */
6967 /* 8 and 9 are not octal */
6970 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6974 case '2': case '3': case '4':
6975 case '5': case '6': case '7':
6977 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6981 b = *s++ & 15; /* ASCII digit -> value of digit */
6985 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6986 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6987 /* make sure they said 0x */
6992 /* Prepare to put the digit we have onto the end
6993 of the number so far. We check for overflows.
6998 x = u << shift; /* make room for the digit */
7000 if ((x >> shift) != u
7001 && !(PL_hints & HINT_NEW_BINARY)) {
7004 if (ckWARN_d(WARN_OVERFLOW))
7005 Perl_warner(aTHX_ WARN_OVERFLOW,
7006 "Integer overflow in %s number",
7009 u = x | b; /* add the digit to the end */
7012 n *= nvshift[shift];
7013 /* If an NV has not enough bits in its
7014 * mantissa to represent an UV this summing of
7015 * small low-order numbers is a waste of time
7016 * (because the NV cannot preserve the
7017 * low-order bits anyway): we could just
7018 * remember when did we overflow and in the
7019 * end just multiply n by the right
7027 /* if we get here, we had success: make a scalar value from
7033 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7034 Perl_warner(aTHX_ WARN_PORTABLE,
7035 "%s number > %s non-portable",
7041 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7042 Perl_warner(aTHX_ WARN_PORTABLE,
7043 "%s number > %s non-portable",
7048 if (PL_hints & HINT_NEW_BINARY)
7049 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
7054 handle decimal numbers.
7055 we're also sent here when we read a 0 as the first digit
7057 case '1': case '2': case '3': case '4': case '5':
7058 case '6': case '7': case '8': case '9': case '.':
7061 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
7064 /* read next group of digits and _ and copy into d */
7065 while (isDIGIT(*s) || *s == '_') {
7066 /* skip underscores, checking for misplaced ones
7070 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
7071 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7075 /* check for end of fixed-length buffer */
7077 Perl_croak(aTHX_ number_too_long);
7078 /* if we're ok, copy the character */
7083 /* final misplaced underbar check */
7084 if (lastub && s - lastub != 3) {
7085 if (ckWARN(WARN_SYNTAX))
7086 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7089 /* read a decimal portion if there is one. avoid
7090 3..5 being interpreted as the number 3. followed
7093 if (*s == '.' && s[1] != '.') {
7097 /* copy, ignoring underbars, until we run out of
7098 digits. Note: no misplaced underbar checks!
7100 for (; isDIGIT(*s) || *s == '_'; s++) {
7101 /* fixed length buffer check */
7103 Perl_croak(aTHX_ number_too_long);
7107 if (*s == '.' && isDIGIT(s[1])) {
7108 /* oops, it's really a v-string, but without the "v" */
7114 /* read exponent part, if present */
7115 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
7119 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
7120 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
7122 /* allow positive or negative exponent */
7123 if (*s == '+' || *s == '-')
7126 /* read digits of exponent (no underbars :-) */
7127 while (isDIGIT(*s)) {
7129 Perl_croak(aTHX_ number_too_long);
7134 /* terminate the string */
7137 /* make an sv from the string */
7140 #if defined(Strtol) && defined(Strtoul)
7143 strtol/strtoll sets errno to ERANGE if the number is too big
7144 for an integer. We try to do an integer conversion first
7145 if no characters indicating "float" have been found.
7152 if (*PL_tokenbuf == '-')
7153 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
7155 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
7157 floatit = TRUE; /* Probably just too large. */
7158 else if (*PL_tokenbuf == '-')
7160 else if (uv <= IV_MAX)
7161 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7166 nv = Atof(PL_tokenbuf);
7171 No working strtou?ll?.
7173 Unfortunately atol() doesn't do range checks (returning
7174 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7175 everywhere [1], so we cannot use use atol() (or atoll()).
7176 If we could, they would be used, as Atol(), very much like
7177 Strtol() and Strtoul() are used above.
7179 [1] XXX Configure test needed to check for atol()
7180 (and atoll()) overflow behaviour XXX
7184 We need to do this the hard way. */
7186 nv = Atof(PL_tokenbuf);
7188 /* See if we can make do with an integer value without loss of
7189 precision. We use U_V to cast to a UV, because some
7190 compilers have issues. Then we try casting it back and see
7191 if it was the same [1]. We only do this if we know we
7192 specifically read an integer. If floatit is true, then we
7193 don't need to do the conversion at all.
7195 [1] Note that this is lossy if our NVs cannot preserve our
7196 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7197 and NV_PRESERVES_UV_BITS (a number), but in general we really
7198 do hope all such potentially lossy platforms have strtou?ll?
7199 to do a lossless IV/UV conversion.
7201 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7202 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7203 as NV_DIG and NV_MANT_DIG)?
7209 if (!floatit && (NV)uv == nv) {
7211 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7219 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7220 (PL_hints & HINT_NEW_INTEGER) )
7221 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7222 (floatit ? "float" : "integer"),
7226 /* if it starts with a v, it could be a v-string */
7232 while (isDIGIT(*pos) || *pos == '_')
7234 if (!isALPHA(*pos)) {
7236 U8 tmpbuf[UTF8_MAXLEN+1];
7238 s++; /* get past 'v' */
7241 sv_setpvn(sv, "", 0);
7244 if (*s == '0' && isDIGIT(s[1]))
7245 yyerror("Octal number in vector unsupported");
7248 /* this is atoi() that tolerates underscores */
7251 while (--end >= s) {
7256 rev += (*end - '0') * mult;
7258 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7259 Perl_warner(aTHX_ WARN_OVERFLOW,
7260 "Integer overflow in decimal number");
7263 /* Append native character for the rev point */
7264 tmpend = uvchr_to_utf8(tmpbuf, rev);
7267 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7268 if (*pos == '.' && isDIGIT(pos[1]))
7274 while (isDIGIT(*pos) || *pos == '_')
7280 /* if (revmax > 127) { */
7283 sv_utf8_downgrade(sv, TRUE);
7290 /* make the op for the constant and return */
7293 lvalp->opval = newSVOP(OP_CONST, 0, sv);
7295 lvalp->opval = Nullop;
7301 S_scan_formline(pTHX_ register char *s)
7305 SV *stuff = newSVpvn("",0);
7306 bool needargs = FALSE;
7309 if (*s == '.' || *s == /*{*/'}') {
7311 #ifdef PERL_STRICT_CR
7312 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7314 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7316 if (*t == '\n' || t == PL_bufend)
7319 if (PL_in_eval && !PL_rsfp) {
7320 eol = strchr(s,'\n');
7325 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7327 for (t = s; t < eol; t++) {
7328 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7330 goto enough; /* ~~ must be first line in formline */
7332 if (*t == '@' || *t == '^')
7335 sv_catpvn(stuff, s, eol-s);
7336 #ifndef PERL_STRICT_CR
7337 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7338 char *end = SvPVX(stuff) + SvCUR(stuff);
7347 s = filter_gets(PL_linestr, PL_rsfp, 0);
7348 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7349 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7350 PL_last_lop = PL_last_uni = Nullch;
7353 yyerror("Format not terminated");
7363 PL_lex_state = LEX_NORMAL;
7364 PL_nextval[PL_nexttoke].ival = 0;
7368 PL_lex_state = LEX_FORMLINE;
7369 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7371 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7375 SvREFCNT_dec(stuff);
7376 PL_lex_formbrack = 0;
7387 PL_cshlen = strlen(PL_cshname);
7392 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7394 I32 oldsavestack_ix = PL_savestack_ix;
7395 CV* outsidecv = PL_compcv;
7399 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7401 SAVEI32(PL_subline);
7402 save_item(PL_subname);
7405 SAVESPTR(PL_comppad_name);
7406 SAVESPTR(PL_compcv);
7407 SAVEI32(PL_comppad_name_fill);
7408 SAVEI32(PL_min_intro_pending);
7409 SAVEI32(PL_max_intro_pending);
7410 SAVEI32(PL_pad_reset_pending);
7412 PL_compcv = (CV*)NEWSV(1104,0);
7413 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7414 CvFLAGS(PL_compcv) |= flags;
7416 PL_comppad = newAV();
7417 av_push(PL_comppad, Nullsv);
7418 PL_curpad = AvARRAY(PL_comppad);
7419 PL_comppad_name = newAV();
7420 PL_comppad_name_fill = 0;
7421 PL_min_intro_pending = 0;
7423 PL_subline = CopLINE(PL_curcop);
7425 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7426 PL_curpad[0] = (SV*)newAV();
7427 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7428 #endif /* USE_THREADS */
7430 comppadlist = newAV();
7431 AvREAL_off(comppadlist);
7432 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7433 av_store(comppadlist, 1, (SV*)PL_comppad);
7435 CvPADLIST(PL_compcv) = comppadlist;
7436 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7438 CvOWNER(PL_compcv) = 0;
7439 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7440 MUTEX_INIT(CvMUTEXP(PL_compcv));
7441 #endif /* USE_THREADS */
7443 return oldsavestack_ix;
7447 #pragma segment Perl_yylex
7450 Perl_yywarn(pTHX_ char *s)
7452 PL_in_eval |= EVAL_WARNONLY;
7454 PL_in_eval &= ~EVAL_WARNONLY;
7459 Perl_yyerror(pTHX_ char *s)
7462 char *context = NULL;
7466 if (!yychar || (yychar == ';' && !PL_rsfp))
7468 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7469 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7470 while (isSPACE(*PL_oldoldbufptr))
7472 context = PL_oldoldbufptr;
7473 contlen = PL_bufptr - PL_oldoldbufptr;
7475 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7476 PL_oldbufptr != PL_bufptr) {
7477 while (isSPACE(*PL_oldbufptr))
7479 context = PL_oldbufptr;
7480 contlen = PL_bufptr - PL_oldbufptr;
7482 else if (yychar > 255)
7483 where = "next token ???";
7484 #ifdef USE_PURE_BISON
7485 /* GNU Bison sets the value -2 */
7486 else if (yychar == -2) {
7488 else if ((yychar & 127) == 127) {
7490 if (PL_lex_state == LEX_NORMAL ||
7491 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7492 where = "at end of line";
7493 else if (PL_lex_inpat)
7494 where = "within pattern";
7496 where = "within string";
7499 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7501 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7502 else if (isPRINT_LC(yychar))
7503 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7505 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7506 where = SvPVX(where_sv);
7508 msg = sv_2mortal(newSVpv(s, 0));
7509 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7510 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7512 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7514 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7515 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7516 Perl_sv_catpvf(aTHX_ msg,
7517 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7518 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7521 if (PL_in_eval & EVAL_WARNONLY)
7522 Perl_warn(aTHX_ "%"SVf, msg);
7525 if (PL_error_count >= 10) {
7526 if (PL_in_eval && SvCUR(ERRSV))
7527 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7528 ERRSV, CopFILE(PL_curcop));
7530 Perl_croak(aTHX_ "%s has too many errors.\n",
7531 CopFILE(PL_curcop));
7534 PL_in_my_stash = Nullhv;
7538 #pragma segment Main
7542 S_swallow_bom(pTHX_ U8 *s)
7545 slen = SvCUR(PL_linestr);
7549 /* UTF-16 little-endian */
7550 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7551 Perl_croak(aTHX_ "Unsupported script encoding");
7552 #ifndef PERL_NO_UTF16_FILTER
7553 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7555 if (PL_bufend > (char*)s) {
7559 filter_add(utf16rev_textfilter, NULL);
7560 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7561 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7562 PL_bufend - (char*)s - 1,
7564 Copy(news, s, newlen, U8);
7565 SvCUR_set(PL_linestr, newlen);
7566 PL_bufend = SvPVX(PL_linestr) + newlen;
7567 news[newlen++] = '\0';
7571 Perl_croak(aTHX_ "Unsupported script encoding");
7576 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7577 #ifndef PERL_NO_UTF16_FILTER
7578 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7580 if (PL_bufend > (char *)s) {
7584 filter_add(utf16_textfilter, NULL);
7585 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7586 PL_bufend = (char*)utf16_to_utf8(s, news,
7587 PL_bufend - (char*)s,
7589 Copy(news, s, newlen, U8);
7590 SvCUR_set(PL_linestr, newlen);
7591 PL_bufend = SvPVX(PL_linestr) + newlen;
7592 news[newlen++] = '\0';
7596 Perl_croak(aTHX_ "Unsupported script encoding");
7601 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7602 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7607 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7608 s[2] == 0xFE && s[3] == 0xFF)
7610 Perl_croak(aTHX_ "Unsupported script encoding");
7622 * Restore a source filter.
7626 restore_rsfp(pTHXo_ void *f)
7628 PerlIO *fp = (PerlIO*)f;
7630 if (PL_rsfp == PerlIO_stdin())
7631 PerlIO_clearerr(PL_rsfp);
7632 else if (PL_rsfp && (PL_rsfp != fp))
7633 PerlIO_close(PL_rsfp);
7637 #ifndef PERL_NO_UTF16_FILTER
7639 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7641 I32 count = FILTER_READ(idx+1, sv, maxlen);
7646 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7647 if (!*SvPV_nolen(sv))
7648 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7651 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7652 sv_usepvn(sv, (char*)tmps, tend - tmps);
7658 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7660 I32 count = FILTER_READ(idx+1, sv, maxlen);
7665 if (!*SvPV_nolen(sv))
7666 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7669 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7670 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7671 sv_usepvn(sv, (char*)tmps, tend - tmps);