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++)
1274 *d++ = NATIVE_TO_NEED(has_utf8,i);
1276 for (i = min; i <= max; i++)
1278 *d++ = NATIVE_TO_NEED(has_utf8,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 != ')')
1317 *d++ = NATIVE_TO_NEED(has_utf8,*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)
1340 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
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')
1348 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
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)) {
1374 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
1375 *d++ = NATIVE_TO_NEED(has_utf8,*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 UTF-8 sequence
1452 * they can end up as. */
1454 /* We need to map to chars to ASCII before doing the tests
1457 if (NATIVE_TO_UNI(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)
1468 for (c = SvPVX(sv); c < d; c++) {
1469 if (UTF8_IS_CONTINUED(NATIVE_TO_ASCII(*c))) {
1473 if (hicount || NATIVE_TO_ASCII('A') != 'A') {
1474 STRLEN offset = d - SvPVX(sv);
1476 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
1480 while (src >= (U8 *)SvPVX(sv)) {
1481 U8 ch = NATIVE_TO_ASCII(*src);
1482 if (UTF8_IS_CONTINUED(ch)) {
1483 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1484 *dst-- = UTF8_EIGHT_BIT_HI(ch);
1494 if (has_utf8 || uv > 255) {
1495 d = (char*)uvchr_to_utf8((U8*)d, uv);
1497 if (PL_lex_inwhat == OP_TRANS &&
1498 PL_sublex_info.sub_op) {
1499 PL_sublex_info.sub_op->op_private |=
1500 (PL_lex_repl ? OPpTRANS_FROM_UTF
1510 *d++ = NATIVE_TO_NEED(has_utf8,uv);
1514 /* \N{latin small letter a} is a named character */
1518 char* e = strchr(s, '}');
1524 yyerror("Missing right brace on \\N{}");
1528 res = newSVpvn(s + 1, e - s - 1);
1529 res = new_constant( Nullch, 0, "charnames",
1530 res, Nullsv, "\\N{...}" );
1532 sv_utf8_upgrade(res);
1533 str = SvPV(res,len);
1534 if (!has_utf8 && SvUTF8(res)) {
1535 char *ostart = SvPVX(sv);
1536 SvCUR_set(sv, d - ostart);
1539 sv_utf8_upgrade(sv);
1540 /* this just broke our allocation above... */
1541 SvGROW(sv, send - start);
1542 d = SvPVX(sv) + SvCUR(sv);
1545 if (len > e - s + 4) {
1546 char *odest = SvPVX(sv);
1548 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
1549 d = SvPVX(sv) + (d - odest);
1551 Copy(str, d, len, char);
1558 yyerror("Missing braces on \\N{}");
1561 /* \c is a control character */
1570 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
1574 /* printf-style backslashes, formfeeds, newlines, etc */
1576 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
1579 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
1582 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
1585 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
1588 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
1591 *d++ = ASCII_TO_NEED(has_utf8,'\033');
1594 *d++ = ASCII_TO_NEED(has_utf8,'\007');
1600 } /* end if (backslash) */
1604 /* The 'has_utf8' here is very dubious */
1605 if (UTF8_IS_CONTINUED(NATIVE_TO_ASCII(*s)) && (this_utf8 || has_utf8)) {
1606 STRLEN len = (STRLEN) -1;
1609 uv = utf8n_to_uvchr((U8*)s, send - s, &len, 0);
1611 if (len == (STRLEN)-1) {
1612 /* Illegal UTF8 (a high-bit byte), make it valid. */
1613 char *old_pvx = SvPVX(sv);
1614 /* need space for one extra char (NOTE: SvCUR() not set here) */
1615 d = SvGROW(sv, SvLEN(sv) + 1) + (d - old_pvx);
1616 d = (char*)uvchr_to_utf8((U8*)d, (U8)*s++);
1623 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1624 PL_sublex_info.sub_op->op_private |=
1625 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1631 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1632 } /* while loop to process each character */
1634 /* terminate the string and set up the sv */
1636 SvCUR_set(sv, d - SvPVX(sv));
1641 /* shrink the sv if we allocated more than we used */
1642 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1643 SvLEN_set(sv, SvCUR(sv) + 1);
1644 Renew(SvPVX(sv), SvLEN(sv), char);
1647 /* return the substring (via yylval) only if we parsed anything */
1648 if (s > PL_bufptr) {
1649 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1650 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1652 ( PL_lex_inwhat == OP_TRANS
1654 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1657 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1664 * Returns TRUE if there's more to the expression (e.g., a subscript),
1667 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1669 * ->[ and ->{ return TRUE
1670 * { and [ outside a pattern are always subscripts, so return TRUE
1671 * if we're outside a pattern and it's not { or [, then return FALSE
1672 * if we're in a pattern and the first char is a {
1673 * {4,5} (any digits around the comma) returns FALSE
1674 * if we're in a pattern and the first char is a [
1676 * [SOMETHING] has a funky algorithm to decide whether it's a
1677 * character class or not. It has to deal with things like
1678 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1679 * anything else returns TRUE
1682 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1685 S_intuit_more(pTHX_ register char *s)
1687 if (PL_lex_brackets)
1689 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1691 if (*s != '{' && *s != '[')
1696 /* In a pattern, so maybe we have {n,m}. */
1713 /* On the other hand, maybe we have a character class */
1716 if (*s == ']' || *s == '^')
1719 /* this is terrifying, and it works */
1720 int weight = 2; /* let's weigh the evidence */
1722 unsigned char un_char = 255, last_un_char;
1723 char *send = strchr(s,']');
1724 char tmpbuf[sizeof PL_tokenbuf * 4];
1726 if (!send) /* has to be an expression */
1729 Zero(seen,256,char);
1732 else if (isDIGIT(*s)) {
1734 if (isDIGIT(s[1]) && s[2] == ']')
1740 for (; s < send; s++) {
1741 last_un_char = un_char;
1742 un_char = (unsigned char)*s;
1747 weight -= seen[un_char] * 10;
1748 if (isALNUM_lazy_if(s+1,UTF)) {
1749 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1750 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1755 else if (*s == '$' && s[1] &&
1756 strchr("[#!%*<>()-=",s[1])) {
1757 if (/*{*/ strchr("])} =",s[2]))
1766 if (strchr("wds]",s[1]))
1768 else if (seen['\''] || seen['"'])
1770 else if (strchr("rnftbxcav",s[1]))
1772 else if (isDIGIT(s[1])) {
1774 while (s[1] && isDIGIT(s[1]))
1784 if (strchr("aA01! ",last_un_char))
1786 if (strchr("zZ79~",s[1]))
1788 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1789 weight -= 5; /* cope with negative subscript */
1792 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1793 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1798 if (keyword(tmpbuf, d - tmpbuf))
1801 if (un_char == last_un_char + 1)
1803 weight -= seen[un_char];
1808 if (weight >= 0) /* probably a character class */
1818 * Does all the checking to disambiguate
1820 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1821 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1823 * First argument is the stuff after the first token, e.g. "bar".
1825 * Not a method if bar is a filehandle.
1826 * Not a method if foo is a subroutine prototyped to take a filehandle.
1827 * Not a method if it's really "Foo $bar"
1828 * Method if it's "foo $bar"
1829 * Not a method if it's really "print foo $bar"
1830 * Method if it's really "foo package::" (interpreted as package->foo)
1831 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1832 * Not a method if bar is a filehandle or package, but is quoted with
1837 S_intuit_method(pTHX_ char *start, GV *gv)
1839 char *s = start + (*start == '$');
1840 char tmpbuf[sizeof PL_tokenbuf];
1848 if ((cv = GvCVu(gv))) {
1849 char *proto = SvPVX(cv);
1859 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1860 /* start is the beginning of the possible filehandle/object,
1861 * and s is the end of it
1862 * tmpbuf is a copy of it
1865 if (*start == '$') {
1866 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1871 return *s == '(' ? FUNCMETH : METHOD;
1873 if (!keyword(tmpbuf, len)) {
1874 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1879 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1880 if (indirgv && GvCVu(indirgv))
1882 /* filehandle or package name makes it a method */
1883 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1885 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1886 return 0; /* no assumptions -- "=>" quotes bearword */
1888 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1889 newSVpvn(tmpbuf,len));
1890 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1894 return *s == '(' ? FUNCMETH : METHOD;
1902 * Return a string of Perl code to load the debugger. If PERL5DB
1903 * is set, it will return the contents of that, otherwise a
1904 * compile-time require of perl5db.pl.
1911 char *pdb = PerlEnv_getenv("PERL5DB");
1915 SETERRNO(0,SS$_NORMAL);
1916 return "BEGIN { require 'perl5db.pl' }";
1922 /* Encoded script support. filter_add() effectively inserts a
1923 * 'pre-processing' function into the current source input stream.
1924 * Note that the filter function only applies to the current source file
1925 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1927 * The datasv parameter (which may be NULL) can be used to pass
1928 * private data to this instance of the filter. The filter function
1929 * can recover the SV using the FILTER_DATA macro and use it to
1930 * store private buffers and state information.
1932 * The supplied datasv parameter is upgraded to a PVIO type
1933 * and the IoDIRP/IoANY field is used to store the function pointer,
1934 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1935 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1936 * private use must be set using malloc'd pointers.
1940 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1945 if (!PL_rsfp_filters)
1946 PL_rsfp_filters = newAV();
1948 datasv = NEWSV(255,0);
1949 if (!SvUPGRADE(datasv, SVt_PVIO))
1950 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1951 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1952 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1953 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1954 funcp, SvPV_nolen(datasv)));
1955 av_unshift(PL_rsfp_filters, 1);
1956 av_store(PL_rsfp_filters, 0, datasv) ;
1961 /* Delete most recently added instance of this filter function. */
1963 Perl_filter_del(pTHX_ filter_t funcp)
1966 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1967 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1969 /* if filter is on top of stack (usual case) just pop it off */
1970 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1971 if (IoANY(datasv) == (void *)funcp) {
1972 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1973 IoANY(datasv) = (void *)NULL;
1974 sv_free(av_pop(PL_rsfp_filters));
1978 /* we need to search for the correct entry and clear it */
1979 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1983 /* Invoke the n'th filter function for the current rsfp. */
1985 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1988 /* 0 = read one text line */
1993 if (!PL_rsfp_filters)
1995 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1996 /* Provide a default input filter to make life easy. */
1997 /* Note that we append to the line. This is handy. */
1998 DEBUG_P(PerlIO_printf(Perl_debug_log,
1999 "filter_read %d: from rsfp\n", idx));
2003 int old_len = SvCUR(buf_sv) ;
2005 /* ensure buf_sv is large enough */
2006 SvGROW(buf_sv, old_len + maxlen) ;
2007 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2008 if (PerlIO_error(PL_rsfp))
2009 return -1; /* error */
2011 return 0 ; /* end of file */
2013 SvCUR_set(buf_sv, old_len + len) ;
2016 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2017 if (PerlIO_error(PL_rsfp))
2018 return -1; /* error */
2020 return 0 ; /* end of file */
2023 return SvCUR(buf_sv);
2025 /* Skip this filter slot if filter has been deleted */
2026 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
2027 DEBUG_P(PerlIO_printf(Perl_debug_log,
2028 "filter_read %d: skipped (filter deleted)\n",
2030 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2032 /* Get function pointer hidden within datasv */
2033 funcp = (filter_t)IoANY(datasv);
2034 DEBUG_P(PerlIO_printf(Perl_debug_log,
2035 "filter_read %d: via function %p (%s)\n",
2036 idx, funcp, SvPV_nolen(datasv)));
2037 /* Call function. The function is expected to */
2038 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2039 /* Return: <0:error, =0:eof, >0:not eof */
2040 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
2044 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2046 #ifdef PERL_CR_FILTER
2047 if (!PL_rsfp_filters) {
2048 filter_add(S_cr_textfilter,NULL);
2051 if (PL_rsfp_filters) {
2054 SvCUR_set(sv, 0); /* start with empty line */
2055 if (FILTER_READ(0, sv, 0) > 0)
2056 return ( SvPVX(sv) ) ;
2061 return (sv_gets(sv, fp, append));
2065 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2069 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2073 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2074 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2076 return GvHV(gv); /* Foo:: */
2079 /* use constant CLASS => 'MyClass' */
2080 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2082 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2083 pkgname = SvPV_nolen(sv);
2087 return gv_stashpv(pkgname, FALSE);
2091 static char* exp_name[] =
2092 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2093 "ATTRTERM", "TERMBLOCK"
2100 Works out what to call the token just pulled out of the input
2101 stream. The yacc parser takes care of taking the ops we return and
2102 stitching them into a tree.
2108 if read an identifier
2109 if we're in a my declaration
2110 croak if they tried to say my($foo::bar)
2111 build the ops for a my() declaration
2112 if it's an access to a my() variable
2113 are we in a sort block?
2114 croak if my($a); $a <=> $b
2115 build ops for access to a my() variable
2116 if in a dq string, and they've said @foo and we can't find @foo
2118 build ops for a bareword
2119 if we already built the token before, use it.
2122 #ifdef USE_PURE_BISON
2124 Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
2129 yylval_pointer[yyactlevel] = lvalp;
2130 yychar_pointer[yyactlevel] = lcharp;
2131 if (yyactlevel >= YYMAXLEVEL)
2132 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
2134 r = Perl_yylex(aTHX);
2144 #pragma segment Perl_yylex
2157 /* check if there's an identifier for us to look at */
2158 if (PL_pending_ident) {
2159 /* pit holds the identifier we read and pending_ident is reset */
2160 char pit = PL_pending_ident;
2161 PL_pending_ident = 0;
2163 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2164 "### Tokener saw identifier '%s'\n", PL_tokenbuf); })
2166 /* if we're in a my(), we can't allow dynamics here.
2167 $foo'bar has already been turned into $foo::bar, so
2168 just check for colons.
2170 if it's a legal name, the OP is a PADANY.
2173 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2174 if (strchr(PL_tokenbuf,':'))
2175 yyerror(Perl_form(aTHX_ "No package name allowed for "
2176 "variable %s in \"our\"",
2178 tmp = pad_allocmy(PL_tokenbuf);
2181 if (strchr(PL_tokenbuf,':'))
2182 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2184 yylval.opval = newOP(OP_PADANY, 0);
2185 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2191 build the ops for accesses to a my() variable.
2193 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2194 then used in a comparison. This catches most, but not
2195 all cases. For instance, it catches
2196 sort { my($a); $a <=> $b }
2198 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2199 (although why you'd do that is anyone's guess).
2202 if (!strchr(PL_tokenbuf,':')) {
2204 /* Check for single character per-thread SVs */
2205 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2206 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2207 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2209 yylval.opval = newOP(OP_THREADSV, 0);
2210 yylval.opval->op_targ = tmp;
2213 #endif /* USE_THREADS */
2214 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2215 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2216 /* might be an "our" variable" */
2217 if (SvFLAGS(namesv) & SVpad_OUR) {
2218 /* build ops for a bareword */
2219 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2220 sv_catpvn(sym, "::", 2);
2221 sv_catpv(sym, PL_tokenbuf+1);
2222 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2223 yylval.opval->op_private = OPpCONST_ENTERED;
2224 gv_fetchpv(SvPVX(sym),
2226 ? (GV_ADDMULTI | GV_ADDINEVAL)
2229 ((PL_tokenbuf[0] == '$') ? SVt_PV
2230 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2235 /* if it's a sort block and they're naming $a or $b */
2236 if (PL_last_lop_op == OP_SORT &&
2237 PL_tokenbuf[0] == '$' &&
2238 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2241 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2242 d < PL_bufend && *d != '\n';
2245 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2246 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2252 yylval.opval = newOP(OP_PADANY, 0);
2253 yylval.opval->op_targ = tmp;
2259 Whine if they've said @foo in a doublequoted string,
2260 and @foo isn't a variable we can find in the symbol
2263 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2264 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2265 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2266 && ckWARN(WARN_AMBIGUOUS))
2268 /* Downgraded from fatal to warning 20000522 mjd */
2269 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2270 "Possible unintended interpolation of %s in string",
2275 /* build ops for a bareword */
2276 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2277 yylval.opval->op_private = OPpCONST_ENTERED;
2278 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2279 ((PL_tokenbuf[0] == '$') ? SVt_PV
2280 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2285 /* no identifier pending identification */
2287 switch (PL_lex_state) {
2289 case LEX_NORMAL: /* Some compilers will produce faster */
2290 case LEX_INTERPNORMAL: /* code if we comment these out. */
2294 /* when we've already built the next token, just pull it out of the queue */
2297 yylval = PL_nextval[PL_nexttoke];
2299 PL_lex_state = PL_lex_defer;
2300 PL_expect = PL_lex_expect;
2301 PL_lex_defer = LEX_NORMAL;
2303 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2304 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
2305 (IV)PL_nexttype[PL_nexttoke]); })
2307 return(PL_nexttype[PL_nexttoke]);
2309 /* interpolated case modifiers like \L \U, including \Q and \E.
2310 when we get here, PL_bufptr is at the \
2312 case LEX_INTERPCASEMOD:
2314 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2315 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2317 /* handle \E or end of string */
2318 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2322 if (PL_lex_casemods) {
2323 oldmod = PL_lex_casestack[--PL_lex_casemods];
2324 PL_lex_casestack[PL_lex_casemods] = '\0';
2326 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2328 PL_lex_state = LEX_INTERPCONCAT;
2332 if (PL_bufptr != PL_bufend)
2334 PL_lex_state = LEX_INTERPCONCAT;
2338 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2339 "### Saw case modifier at '%s'\n", PL_bufptr); })
2341 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2342 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2343 if (strchr("LU", *s) &&
2344 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2346 PL_lex_casestack[--PL_lex_casemods] = '\0';
2349 if (PL_lex_casemods > 10) {
2350 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2351 if (newlb != PL_lex_casestack) {
2353 PL_lex_casestack = newlb;
2356 PL_lex_casestack[PL_lex_casemods++] = *s;
2357 PL_lex_casestack[PL_lex_casemods] = '\0';
2358 PL_lex_state = LEX_INTERPCONCAT;
2359 PL_nextval[PL_nexttoke].ival = 0;
2362 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2364 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2366 PL_nextval[PL_nexttoke].ival = OP_LC;
2368 PL_nextval[PL_nexttoke].ival = OP_UC;
2370 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2372 Perl_croak(aTHX_ "panic: yylex");
2375 if (PL_lex_starts) {
2384 case LEX_INTERPPUSH:
2385 return sublex_push();
2387 case LEX_INTERPSTART:
2388 if (PL_bufptr == PL_bufend)
2389 return sublex_done();
2390 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2391 "### Interpolated variable at '%s'\n", PL_bufptr); })
2393 PL_lex_dojoin = (*PL_bufptr == '@');
2394 PL_lex_state = LEX_INTERPNORMAL;
2395 if (PL_lex_dojoin) {
2396 PL_nextval[PL_nexttoke].ival = 0;
2399 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2400 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2401 force_next(PRIVATEREF);
2403 force_ident("\"", '$');
2404 #endif /* USE_THREADS */
2405 PL_nextval[PL_nexttoke].ival = 0;
2407 PL_nextval[PL_nexttoke].ival = 0;
2409 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2412 if (PL_lex_starts++) {
2418 case LEX_INTERPENDMAYBE:
2419 if (intuit_more(PL_bufptr)) {
2420 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2426 if (PL_lex_dojoin) {
2427 PL_lex_dojoin = FALSE;
2428 PL_lex_state = LEX_INTERPCONCAT;
2431 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2432 && SvEVALED(PL_lex_repl))
2434 if (PL_bufptr != PL_bufend)
2435 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2436 PL_lex_repl = Nullsv;
2439 case LEX_INTERPCONCAT:
2441 if (PL_lex_brackets)
2442 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2444 if (PL_bufptr == PL_bufend)
2445 return sublex_done();
2447 if (SvIVX(PL_linestr) == '\'') {
2448 SV *sv = newSVsv(PL_linestr);
2451 else if ( PL_hints & HINT_NEW_RE )
2452 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2453 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2457 s = scan_const(PL_bufptr);
2459 PL_lex_state = LEX_INTERPCASEMOD;
2461 PL_lex_state = LEX_INTERPSTART;
2464 if (s != PL_bufptr) {
2465 PL_nextval[PL_nexttoke] = yylval;
2468 if (PL_lex_starts++)
2478 PL_lex_state = LEX_NORMAL;
2479 s = scan_formline(PL_bufptr);
2480 if (!PL_lex_formbrack)
2486 PL_oldoldbufptr = PL_oldbufptr;
2489 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2490 exp_name[PL_expect], s);
2496 if (isIDFIRST_lazy_if(s,UTF))
2498 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2501 goto fake_eof; /* emulate EOF on ^D or ^Z */
2506 if (PL_lex_brackets)
2507 yyerror("Missing right curly or square bracket");
2508 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2509 "### Tokener got EOF\n");
2513 if (s++ < PL_bufend)
2514 goto retry; /* ignore stray nulls */
2517 if (!PL_in_eval && !PL_preambled) {
2518 PL_preambled = TRUE;
2519 sv_setpv(PL_linestr,incl_perldb());
2520 if (SvCUR(PL_linestr))
2521 sv_catpv(PL_linestr,";");
2523 while(AvFILLp(PL_preambleav) >= 0) {
2524 SV *tmpsv = av_shift(PL_preambleav);
2525 sv_catsv(PL_linestr, tmpsv);
2526 sv_catpv(PL_linestr, ";");
2529 sv_free((SV*)PL_preambleav);
2530 PL_preambleav = NULL;
2532 if (PL_minus_n || PL_minus_p) {
2533 sv_catpv(PL_linestr, "LINE: while (<>) {");
2535 sv_catpv(PL_linestr,"chomp;");
2537 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2539 GvIMPORTED_AV_on(gv);
2541 if (strchr("/'\"", *PL_splitstr)
2542 && strchr(PL_splitstr + 1, *PL_splitstr))
2543 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2546 s = "'~#\200\1'"; /* surely one char is unused...*/
2547 while (s[1] && strchr(PL_splitstr, *s)) s++;
2549 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2550 "q" + (delim == '\''), delim);
2551 for (s = PL_splitstr; *s; s++) {
2553 sv_catpvn(PL_linestr, "\\", 1);
2554 sv_catpvn(PL_linestr, s, 1);
2556 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2560 sv_catpv(PL_linestr,"@F=split(' ');");
2563 sv_catpv(PL_linestr, "\n");
2564 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2565 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2566 PL_last_lop = PL_last_uni = Nullch;
2567 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2568 SV *sv = NEWSV(85,0);
2570 sv_upgrade(sv, SVt_PVMG);
2571 sv_setsv(sv,PL_linestr);
2572 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2577 bof = PL_rsfp ? TRUE : FALSE;
2578 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2581 if (PL_preprocess && !PL_in_eval)
2582 (void)PerlProc_pclose(PL_rsfp);
2583 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2584 PerlIO_clearerr(PL_rsfp);
2586 (void)PerlIO_close(PL_rsfp);
2588 PL_doextract = FALSE;
2590 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2591 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2592 sv_catpv(PL_linestr,";}");
2593 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2594 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2595 PL_last_lop = PL_last_uni = Nullch;
2596 PL_minus_n = PL_minus_p = 0;
2599 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2600 PL_last_lop = PL_last_uni = Nullch;
2601 sv_setpv(PL_linestr,"");
2602 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2604 /* if it looks like the start of a BOM, check if it in fact is */
2605 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
2606 #ifdef PERLIO_IS_STDIO
2607 # ifdef __GNU_LIBRARY__
2608 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
2609 # define FTELL_FOR_PIPE_IS_BROKEN
2613 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2614 # define FTELL_FOR_PIPE_IS_BROKEN
2619 #ifdef FTELL_FOR_PIPE_IS_BROKEN
2620 /* This loses the possibility to detect the bof
2621 * situation on perl -P when the libc5 is being used.
2622 * Workaround? Maybe attach some extra state to PL_rsfp?
2625 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2627 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2630 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2631 s = swallow_bom((U8*)s);
2635 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2636 PL_doextract = FALSE;
2638 /* Incest with pod. */
2639 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2640 sv_setpv(PL_linestr, "");
2641 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2642 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2643 PL_last_lop = PL_last_uni = Nullch;
2644 PL_doextract = FALSE;
2648 } while (PL_doextract);
2649 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2650 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2651 SV *sv = NEWSV(85,0);
2653 sv_upgrade(sv, SVt_PVMG);
2654 sv_setsv(sv,PL_linestr);
2655 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2657 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2658 PL_last_lop = PL_last_uni = Nullch;
2659 if (CopLINE(PL_curcop) == 1) {
2660 while (s < PL_bufend && isSPACE(*s))
2662 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2666 if (*s == '#' && *(s+1) == '!')
2668 #ifdef ALTERNATE_SHEBANG
2670 static char as[] = ALTERNATE_SHEBANG;
2671 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2672 d = s + (sizeof(as) - 1);
2674 #endif /* ALTERNATE_SHEBANG */
2683 while (*d && !isSPACE(*d))
2687 #ifdef ARG_ZERO_IS_SCRIPT
2688 if (ipathend > ipath) {
2690 * HP-UX (at least) sets argv[0] to the script name,
2691 * which makes $^X incorrect. And Digital UNIX and Linux,
2692 * at least, set argv[0] to the basename of the Perl
2693 * interpreter. So, having found "#!", we'll set it right.
2695 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2696 assert(SvPOK(x) || SvGMAGICAL(x));
2697 if (sv_eq(x, CopFILESV(PL_curcop))) {
2698 sv_setpvn(x, ipath, ipathend - ipath);
2701 TAINT_NOT; /* $^X is always tainted, but that's OK */
2703 #endif /* ARG_ZERO_IS_SCRIPT */
2708 d = instr(s,"perl -");
2710 d = instr(s,"perl");
2712 /* avoid getting into infinite loops when shebang
2713 * line contains "Perl" rather than "perl" */
2715 for (d = ipathend-4; d >= ipath; --d) {
2716 if ((*d == 'p' || *d == 'P')
2717 && !ibcmp(d, "perl", 4))
2727 #ifdef ALTERNATE_SHEBANG
2729 * If the ALTERNATE_SHEBANG on this system starts with a
2730 * character that can be part of a Perl expression, then if
2731 * we see it but not "perl", we're probably looking at the
2732 * start of Perl code, not a request to hand off to some
2733 * other interpreter. Similarly, if "perl" is there, but
2734 * not in the first 'word' of the line, we assume the line
2735 * contains the start of the Perl program.
2737 if (d && *s != '#') {
2739 while (*c && !strchr("; \t\r\n\f\v#", *c))
2742 d = Nullch; /* "perl" not in first word; ignore */
2744 *s = '#'; /* Don't try to parse shebang line */
2746 #endif /* ALTERNATE_SHEBANG */
2747 #ifndef MACOS_TRADITIONAL
2752 !instr(s,"indir") &&
2753 instr(PL_origargv[0],"perl"))
2759 while (s < PL_bufend && isSPACE(*s))
2761 if (s < PL_bufend) {
2762 Newz(899,newargv,PL_origargc+3,char*);
2764 while (s < PL_bufend && !isSPACE(*s))
2767 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2770 newargv = PL_origargv;
2772 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
2773 Perl_croak(aTHX_ "Can't exec %s", ipath);
2777 U32 oldpdb = PL_perldb;
2778 bool oldn = PL_minus_n;
2779 bool oldp = PL_minus_p;
2781 while (*d && !isSPACE(*d)) d++;
2782 while (SPACE_OR_TAB(*d)) d++;
2786 if (*d == 'M' || *d == 'm') {
2788 while (*d && !isSPACE(*d)) d++;
2789 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2792 d = moreswitches(d);
2794 if ((PERLDB_LINE && !oldpdb) ||
2795 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2796 /* if we have already added "LINE: while (<>) {",
2797 we must not do it again */
2799 sv_setpv(PL_linestr, "");
2800 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2801 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2802 PL_last_lop = PL_last_uni = Nullch;
2803 PL_preambled = FALSE;
2805 (void)gv_fetchfile(PL_origfilename);
2812 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2814 PL_lex_state = LEX_FORMLINE;
2819 #ifdef PERL_STRICT_CR
2820 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2822 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2824 case ' ': case '\t': case '\f': case 013:
2825 #ifdef MACOS_TRADITIONAL
2832 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2833 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2834 /* handle eval qq[#line 1 "foo"\n ...] */
2835 CopLINE_dec(PL_curcop);
2839 while (s < d && *s != '\n')
2844 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2846 PL_lex_state = LEX_FORMLINE;
2856 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2863 while (s < PL_bufend && SPACE_OR_TAB(*s))
2866 if (strnEQ(s,"=>",2)) {
2867 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2868 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2869 "### Saw unary minus before =>, forcing word '%s'\n", s);
2871 OPERATOR('-'); /* unary minus */
2873 PL_last_uni = PL_oldbufptr;
2875 case 'r': ftst = OP_FTEREAD; break;
2876 case 'w': ftst = OP_FTEWRITE; break;
2877 case 'x': ftst = OP_FTEEXEC; break;
2878 case 'o': ftst = OP_FTEOWNED; break;
2879 case 'R': ftst = OP_FTRREAD; break;
2880 case 'W': ftst = OP_FTRWRITE; break;
2881 case 'X': ftst = OP_FTREXEC; break;
2882 case 'O': ftst = OP_FTROWNED; break;
2883 case 'e': ftst = OP_FTIS; break;
2884 case 'z': ftst = OP_FTZERO; break;
2885 case 's': ftst = OP_FTSIZE; break;
2886 case 'f': ftst = OP_FTFILE; break;
2887 case 'd': ftst = OP_FTDIR; break;
2888 case 'l': ftst = OP_FTLINK; break;
2889 case 'p': ftst = OP_FTPIPE; break;
2890 case 'S': ftst = OP_FTSOCK; break;
2891 case 'u': ftst = OP_FTSUID; break;
2892 case 'g': ftst = OP_FTSGID; break;
2893 case 'k': ftst = OP_FTSVTX; break;
2894 case 'b': ftst = OP_FTBLK; break;
2895 case 'c': ftst = OP_FTCHR; break;
2896 case 't': ftst = OP_FTTTY; break;
2897 case 'T': ftst = OP_FTTEXT; break;
2898 case 'B': ftst = OP_FTBINARY; break;
2899 case 'M': case 'A': case 'C':
2900 gv_fetchpv("\024",TRUE, SVt_PV);
2902 case 'M': ftst = OP_FTMTIME; break;
2903 case 'A': ftst = OP_FTATIME; break;
2904 case 'C': ftst = OP_FTCTIME; break;
2912 PL_last_lop_op = ftst;
2913 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2914 "### Saw file test %c\n", (int)ftst);
2919 /* Assume it was a minus followed by a one-letter named
2920 * subroutine call (or a -bareword), then. */
2921 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2922 "### %c looked like a file test but was not\n",
2931 if (PL_expect == XOPERATOR)
2936 else if (*s == '>') {
2939 if (isIDFIRST_lazy_if(s,UTF)) {
2940 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2948 if (PL_expect == XOPERATOR)
2951 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2953 OPERATOR('-'); /* unary minus */
2960 if (PL_expect == XOPERATOR)
2965 if (PL_expect == XOPERATOR)
2968 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2974 if (PL_expect != XOPERATOR) {
2975 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2976 PL_expect = XOPERATOR;
2977 force_ident(PL_tokenbuf, '*');
2990 if (PL_expect == XOPERATOR) {
2994 PL_tokenbuf[0] = '%';
2995 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2996 if (!PL_tokenbuf[1]) {
2998 yyerror("Final % should be \\% or %name");
3001 PL_pending_ident = '%';
3020 switch (PL_expect) {
3023 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
3025 PL_bufptr = s; /* update in case we back off */
3031 PL_expect = XTERMBLOCK;
3035 while (isIDFIRST_lazy_if(s,UTF)) {
3036 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3037 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
3038 if (tmp < 0) tmp = -tmp;
3053 d = scan_str(d,TRUE,TRUE);
3055 /* MUST advance bufptr here to avoid bogus
3056 "at end of line" context messages from yyerror().
3058 PL_bufptr = s + len;
3059 yyerror("Unterminated attribute parameter in attribute list");
3062 return 0; /* EOF indicator */
3066 SV *sv = newSVpvn(s, len);
3067 sv_catsv(sv, PL_lex_stuff);
3068 attrs = append_elem(OP_LIST, attrs,
3069 newSVOP(OP_CONST, 0, sv));
3070 SvREFCNT_dec(PL_lex_stuff);
3071 PL_lex_stuff = Nullsv;
3074 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
3075 CvLVALUE_on(PL_compcv);
3076 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
3077 CvLOCKED_on(PL_compcv);
3078 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
3079 CvMETHOD_on(PL_compcv);
3081 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "shared", len))
3082 GvSHARED_on(cGVOPx_gv(yylval.opval));
3084 /* After we've set the flags, it could be argued that
3085 we don't need to do the attributes.pm-based setting
3086 process, and shouldn't bother appending recognized
3087 flags. To experiment with that, uncomment the
3088 following "else": */
3090 attrs = append_elem(OP_LIST, attrs,
3091 newSVOP(OP_CONST, 0,
3095 if (*s == ':' && s[1] != ':')
3098 break; /* require real whitespace or :'s */
3100 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
3101 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
3102 char q = ((*s == '\'') ? '"' : '\'');
3103 /* If here for an expression, and parsed no attrs, back off. */
3104 if (tmp == '=' && !attrs) {
3108 /* MUST advance bufptr here to avoid bogus "at end of line"
3109 context messages from yyerror().
3113 yyerror("Unterminated attribute list");
3115 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3123 PL_nextval[PL_nexttoke].opval = attrs;
3131 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3132 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
3148 if (PL_lex_brackets <= 0)
3149 yyerror("Unmatched right square bracket");
3152 if (PL_lex_state == LEX_INTERPNORMAL) {
3153 if (PL_lex_brackets == 0) {
3154 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3155 PL_lex_state = LEX_INTERPEND;
3162 if (PL_lex_brackets > 100) {
3163 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3164 if (newlb != PL_lex_brackstack) {
3166 PL_lex_brackstack = newlb;
3169 switch (PL_expect) {
3171 if (PL_lex_formbrack) {
3175 if (PL_oldoldbufptr == PL_last_lop)
3176 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3178 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3179 OPERATOR(HASHBRACK);
3181 while (s < PL_bufend && SPACE_OR_TAB(*s))
3184 PL_tokenbuf[0] = '\0';
3185 if (d < PL_bufend && *d == '-') {
3186 PL_tokenbuf[0] = '-';
3188 while (d < PL_bufend && SPACE_OR_TAB(*d))
3191 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3192 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3194 while (d < PL_bufend && SPACE_OR_TAB(*d))
3197 char minus = (PL_tokenbuf[0] == '-');
3198 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3206 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3211 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3216 if (PL_oldoldbufptr == PL_last_lop)
3217 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3219 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3222 OPERATOR(HASHBRACK);
3223 /* This hack serves to disambiguate a pair of curlies
3224 * as being a block or an anon hash. Normally, expectation
3225 * determines that, but in cases where we're not in a
3226 * position to expect anything in particular (like inside
3227 * eval"") we have to resolve the ambiguity. This code
3228 * covers the case where the first term in the curlies is a
3229 * quoted string. Most other cases need to be explicitly
3230 * disambiguated by prepending a `+' before the opening
3231 * curly in order to force resolution as an anon hash.
3233 * XXX should probably propagate the outer expectation
3234 * into eval"" to rely less on this hack, but that could
3235 * potentially break current behavior of eval"".
3239 if (*s == '\'' || *s == '"' || *s == '`') {
3240 /* common case: get past first string, handling escapes */
3241 for (t++; t < PL_bufend && *t != *s;)
3242 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3246 else if (*s == 'q') {
3249 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3253 char open, close, term;
3256 while (t < PL_bufend && isSPACE(*t))
3260 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3264 for (t++; t < PL_bufend; t++) {
3265 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3267 else if (*t == open)
3271 for (t++; t < PL_bufend; t++) {
3272 if (*t == '\\' && t+1 < PL_bufend)
3274 else if (*t == close && --brackets <= 0)
3276 else if (*t == open)
3282 else if (isALNUM_lazy_if(t,UTF)) {
3284 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3287 while (t < PL_bufend && isSPACE(*t))
3289 /* if comma follows first term, call it an anon hash */
3290 /* XXX it could be a comma expression with loop modifiers */
3291 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3292 || (*t == '=' && t[1] == '>')))
3293 OPERATOR(HASHBRACK);
3294 if (PL_expect == XREF)
3297 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3303 yylval.ival = CopLINE(PL_curcop);
3304 if (isSPACE(*s) || *s == '#')
3305 PL_copline = NOLINE; /* invalidate current command line number */
3310 if (PL_lex_brackets <= 0)
3311 yyerror("Unmatched right curly bracket");
3313 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3314 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3315 PL_lex_formbrack = 0;
3316 if (PL_lex_state == LEX_INTERPNORMAL) {
3317 if (PL_lex_brackets == 0) {
3318 if (PL_expect & XFAKEBRACK) {
3319 PL_expect &= XENUMMASK;
3320 PL_lex_state = LEX_INTERPEND;
3322 return yylex(); /* ignore fake brackets */
3324 if (*s == '-' && s[1] == '>')
3325 PL_lex_state = LEX_INTERPENDMAYBE;
3326 else if (*s != '[' && *s != '{')
3327 PL_lex_state = LEX_INTERPEND;
3330 if (PL_expect & XFAKEBRACK) {
3331 PL_expect &= XENUMMASK;
3333 return yylex(); /* ignore fake brackets */
3343 if (PL_expect == XOPERATOR) {
3344 if (ckWARN(WARN_SEMICOLON)
3345 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3347 CopLINE_dec(PL_curcop);
3348 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3349 CopLINE_inc(PL_curcop);
3354 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3356 PL_expect = XOPERATOR;
3357 force_ident(PL_tokenbuf, '&');
3361 yylval.ival = (OPpENTERSUB_AMPER<<8);
3380 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3381 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3383 if (PL_expect == XSTATE && isALPHA(tmp) &&
3384 (s == PL_linestart+1 || s[-2] == '\n') )
3386 if (PL_in_eval && !PL_rsfp) {
3391 if (strnEQ(s,"=cut",4)) {
3405 PL_doextract = TRUE;
3408 if (PL_lex_brackets < PL_lex_formbrack) {
3410 #ifdef PERL_STRICT_CR
3411 for (t = s; SPACE_OR_TAB(*t); t++) ;
3413 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3415 if (*t == '\n' || *t == '#') {
3433 if (PL_expect != XOPERATOR) {
3434 if (s[1] != '<' && !strchr(s,'>'))
3437 s = scan_heredoc(s);
3439 s = scan_inputsymbol(s);
3440 TERM(sublex_start());
3445 SHop(OP_LEFT_SHIFT);
3459 SHop(OP_RIGHT_SHIFT);
3468 if (PL_expect == XOPERATOR) {
3469 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3472 return ','; /* grandfather non-comma-format format */
3476 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3477 PL_tokenbuf[0] = '@';
3478 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3479 sizeof PL_tokenbuf - 1, FALSE);
3480 if (PL_expect == XOPERATOR)
3481 no_op("Array length", s);
3482 if (!PL_tokenbuf[1])
3484 PL_expect = XOPERATOR;
3485 PL_pending_ident = '#';
3489 PL_tokenbuf[0] = '$';
3490 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3491 sizeof PL_tokenbuf - 1, FALSE);
3492 if (PL_expect == XOPERATOR)
3494 if (!PL_tokenbuf[1]) {
3496 yyerror("Final $ should be \\$ or $name");
3500 /* This kludge not intended to be bulletproof. */
3501 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3502 yylval.opval = newSVOP(OP_CONST, 0,
3503 newSViv(PL_compiling.cop_arybase));
3504 yylval.opval->op_private = OPpCONST_ARYBASE;
3510 if (PL_lex_state == LEX_NORMAL)
3513 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3516 PL_tokenbuf[0] = '@';
3517 if (ckWARN(WARN_SYNTAX)) {
3519 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3522 PL_bufptr = skipspace(PL_bufptr);
3523 while (t < PL_bufend && *t != ']')
3525 Perl_warner(aTHX_ WARN_SYNTAX,
3526 "Multidimensional syntax %.*s not supported",
3527 (t - PL_bufptr) + 1, PL_bufptr);
3531 else if (*s == '{') {
3532 PL_tokenbuf[0] = '%';
3533 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3534 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3536 char tmpbuf[sizeof PL_tokenbuf];
3538 for (t++; isSPACE(*t); t++) ;
3539 if (isIDFIRST_lazy_if(t,UTF)) {
3540 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3541 for (; isSPACE(*t); t++) ;
3542 if (*t == ';' && get_cv(tmpbuf, FALSE))
3543 Perl_warner(aTHX_ WARN_SYNTAX,
3544 "You need to quote \"%s\"", tmpbuf);
3550 PL_expect = XOPERATOR;
3551 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3552 bool islop = (PL_last_lop == PL_oldoldbufptr);
3553 if (!islop || PL_last_lop_op == OP_GREPSTART)
3554 PL_expect = XOPERATOR;
3555 else if (strchr("$@\"'`q", *s))
3556 PL_expect = XTERM; /* e.g. print $fh "foo" */
3557 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3558 PL_expect = XTERM; /* e.g. print $fh &sub */
3559 else if (isIDFIRST_lazy_if(s,UTF)) {
3560 char tmpbuf[sizeof PL_tokenbuf];
3561 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3562 if ((tmp = keyword(tmpbuf, len))) {
3563 /* binary operators exclude handle interpretations */
3575 PL_expect = XTERM; /* e.g. print $fh length() */
3580 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3581 if (gv && GvCVu(gv))
3582 PL_expect = XTERM; /* e.g. print $fh subr() */
3585 else if (isDIGIT(*s))
3586 PL_expect = XTERM; /* e.g. print $fh 3 */
3587 else if (*s == '.' && isDIGIT(s[1]))
3588 PL_expect = XTERM; /* e.g. print $fh .3 */
3589 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3590 PL_expect = XTERM; /* e.g. print $fh -1 */
3591 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3592 PL_expect = XTERM; /* print $fh <<"EOF" */
3594 PL_pending_ident = '$';
3598 if (PL_expect == XOPERATOR)
3600 PL_tokenbuf[0] = '@';
3601 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3602 if (!PL_tokenbuf[1]) {
3604 yyerror("Final @ should be \\@ or @name");
3607 if (PL_lex_state == LEX_NORMAL)
3609 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3611 PL_tokenbuf[0] = '%';
3613 /* Warn about @ where they meant $. */
3614 if (ckWARN(WARN_SYNTAX)) {
3615 if (*s == '[' || *s == '{') {
3617 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3619 if (*t == '}' || *t == ']') {
3621 PL_bufptr = skipspace(PL_bufptr);
3622 Perl_warner(aTHX_ WARN_SYNTAX,
3623 "Scalar value %.*s better written as $%.*s",
3624 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3629 PL_pending_ident = '@';
3632 case '/': /* may either be division or pattern */
3633 case '?': /* may either be conditional or pattern */
3634 if (PL_expect != XOPERATOR) {
3635 /* Disable warning on "study /blah/" */
3636 if (PL_oldoldbufptr == PL_last_uni
3637 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3638 || memNE(PL_last_uni, "study", 5)
3639 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3641 s = scan_pat(s,OP_MATCH);
3642 TERM(sublex_start());
3650 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3651 #ifdef PERL_STRICT_CR
3654 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3656 && (s == PL_linestart || s[-1] == '\n') )
3658 PL_lex_formbrack = 0;
3662 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3668 yylval.ival = OPf_SPECIAL;
3674 if (PL_expect != XOPERATOR)
3679 case '0': case '1': case '2': case '3': case '4':
3680 case '5': case '6': case '7': case '8': case '9':
3681 s = scan_num(s, &yylval);
3682 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3683 "### Saw number in '%s'\n", s);
3685 if (PL_expect == XOPERATOR)
3690 s = scan_str(s,FALSE,FALSE);
3691 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3692 "### Saw string before '%s'\n", s);
3694 if (PL_expect == XOPERATOR) {
3695 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3698 return ','; /* grandfather non-comma-format format */
3704 missingterm((char*)0);
3705 yylval.ival = OP_CONST;
3706 TERM(sublex_start());
3709 s = scan_str(s,FALSE,FALSE);
3710 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3711 "### Saw string before '%s'\n", s);
3713 if (PL_expect == XOPERATOR) {
3714 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3717 return ','; /* grandfather non-comma-format format */
3723 missingterm((char*)0);
3724 yylval.ival = OP_CONST;
3725 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3726 if (*d == '$' || *d == '@' || *d == '\\' || UTF8_IS_CONTINUED(*d)) {
3727 yylval.ival = OP_STRINGIFY;
3731 TERM(sublex_start());
3734 s = scan_str(s,FALSE,FALSE);
3735 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3736 "### Saw backtick string before '%s'\n", s);
3738 if (PL_expect == XOPERATOR)
3739 no_op("Backticks",s);
3741 missingterm((char*)0);
3742 yylval.ival = OP_BACKTICK;
3744 TERM(sublex_start());
3748 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3749 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3751 if (PL_expect == XOPERATOR)
3752 no_op("Backslash",s);
3756 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3760 while (isDIGIT(*start) || *start == '_')
3762 if (*start == '.' && isDIGIT(start[1])) {
3763 s = scan_num(s, &yylval);
3766 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3767 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3771 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3774 s = scan_num(s, &yylval);
3781 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3820 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3822 /* Some keywords can be followed by any delimiter, including ':' */
3823 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3824 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3825 (PL_tokenbuf[0] == 'q' &&
3826 strchr("qwxr", PL_tokenbuf[1])))));
3828 /* x::* is just a word, unless x is "CORE" */
3829 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3833 while (d < PL_bufend && isSPACE(*d))
3834 d++; /* no comments skipped here, or s### is misparsed */
3836 /* Is this a label? */
3837 if (!tmp && PL_expect == XSTATE
3838 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3840 yylval.pval = savepv(PL_tokenbuf);
3845 /* Check for keywords */
3846 tmp = keyword(PL_tokenbuf, len);
3848 /* Is this a word before a => operator? */
3849 if (*d == '=' && d[1] == '>') {
3851 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3852 yylval.opval->op_private = OPpCONST_BARE;
3853 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
3854 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3858 if (tmp < 0) { /* second-class keyword? */
3859 GV *ogv = Nullgv; /* override (winner) */
3860 GV *hgv = Nullgv; /* hidden (loser) */
3861 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3863 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3866 if (GvIMPORTED_CV(gv))
3868 else if (! CvMETHOD(cv))
3872 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3873 (gv = *gvp) != (GV*)&PL_sv_undef &&
3874 GvCVu(gv) && GvIMPORTED_CV(gv))
3880 tmp = 0; /* overridden by import or by GLOBAL */
3883 && -tmp==KEY_lock /* XXX generalizable kludge */
3885 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3887 tmp = 0; /* any sub overrides "weak" keyword */
3889 else { /* no override */
3893 if (ckWARN(WARN_AMBIGUOUS) && hgv
3894 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3895 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3896 "Ambiguous call resolved as CORE::%s(), %s",
3897 GvENAME(hgv), "qualify as such or use &");
3904 default: /* not a keyword */
3907 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3909 /* Get the rest if it looks like a package qualifier */
3911 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3913 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3916 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3917 *s == '\'' ? "'" : "::");
3921 if (PL_expect == XOPERATOR) {
3922 if (PL_bufptr == PL_linestart) {
3923 CopLINE_dec(PL_curcop);
3924 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3925 CopLINE_inc(PL_curcop);
3928 no_op("Bareword",s);
3931 /* Look for a subroutine with this name in current package,
3932 unless name is "Foo::", in which case Foo is a bearword
3933 (and a package name). */
3936 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3938 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3939 Perl_warner(aTHX_ WARN_BAREWORD,
3940 "Bareword \"%s\" refers to nonexistent package",
3943 PL_tokenbuf[len] = '\0';
3950 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3953 /* if we saw a global override before, get the right name */
3956 sv = newSVpvn("CORE::GLOBAL::",14);
3957 sv_catpv(sv,PL_tokenbuf);
3960 sv = newSVpv(PL_tokenbuf,0);
3962 /* Presume this is going to be a bareword of some sort. */
3965 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3966 yylval.opval->op_private = OPpCONST_BARE;
3968 /* And if "Foo::", then that's what it certainly is. */
3973 /* See if it's the indirect object for a list operator. */
3975 if (PL_oldoldbufptr &&
3976 PL_oldoldbufptr < PL_bufptr &&
3977 (PL_oldoldbufptr == PL_last_lop
3978 || PL_oldoldbufptr == PL_last_uni) &&
3979 /* NO SKIPSPACE BEFORE HERE! */
3980 (PL_expect == XREF ||
3981 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3983 bool immediate_paren = *s == '(';
3985 /* (Now we can afford to cross potential line boundary.) */
3988 /* Two barewords in a row may indicate method call. */
3990 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3993 /* If not a declared subroutine, it's an indirect object. */
3994 /* (But it's an indir obj regardless for sort.) */
3996 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
3997 ((!gv || !GvCVu(gv)) &&
3998 (PL_last_lop_op != OP_MAPSTART &&
3999 PL_last_lop_op != OP_GREPSTART))))
4001 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
4007 PL_expect = XOPERATOR;
4010 /* Is this a word before a => operator? */
4011 if (*s == '=' && s[1] == '>') {
4013 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
4014 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
4015 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
4019 /* If followed by a paren, it's certainly a subroutine. */
4022 if (gv && GvCVu(gv)) {
4023 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
4024 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
4029 PL_nextval[PL_nexttoke].opval = yylval.opval;
4030 PL_expect = XOPERATOR;
4036 /* If followed by var or block, call it a method (unless sub) */
4038 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
4039 PL_last_lop = PL_oldbufptr;
4040 PL_last_lop_op = OP_METHOD;
4044 /* If followed by a bareword, see if it looks like indir obj. */
4046 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
4049 /* Not a method, so call it a subroutine (if defined) */
4051 if (gv && GvCVu(gv)) {
4053 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
4054 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4055 "Ambiguous use of -%s resolved as -&%s()",
4056 PL_tokenbuf, PL_tokenbuf);
4057 /* Check for a constant sub */
4059 if ((sv = cv_const_sv(cv))) {
4061 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
4062 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
4063 yylval.opval->op_private = 0;
4067 /* Resolve to GV now. */
4068 op_free(yylval.opval);
4069 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
4070 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
4071 PL_last_lop = PL_oldbufptr;
4072 PL_last_lop_op = OP_ENTERSUB;
4073 /* Is there a prototype? */
4076 char *proto = SvPV((SV*)cv, len);
4079 if (strEQ(proto, "$"))
4081 if (*proto == '&' && *s == '{') {
4082 sv_setpv(PL_subname,"__ANON__");
4086 PL_nextval[PL_nexttoke].opval = yylval.opval;
4092 /* Call it a bare word */
4094 if (PL_hints & HINT_STRICT_SUBS)
4095 yylval.opval->op_private |= OPpCONST_STRICT;
4098 if (ckWARN(WARN_RESERVED)) {
4099 if (lastchar != '-') {
4100 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
4102 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
4109 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
4110 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4111 "Operator or semicolon missing before %c%s",
4112 lastchar, PL_tokenbuf);
4113 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4114 "Ambiguous use of %c resolved as operator %c",
4115 lastchar, lastchar);
4121 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4122 newSVpv(CopFILE(PL_curcop),0));
4126 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4127 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
4130 case KEY___PACKAGE__:
4131 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4133 ? newSVsv(PL_curstname)
4142 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
4143 char *pname = "main";
4144 if (PL_tokenbuf[2] == 'D')
4145 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
4146 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
4149 GvIOp(gv) = newIO();
4150 IoIFP(GvIOp(gv)) = PL_rsfp;
4151 #if defined(HAS_FCNTL) && defined(F_SETFD)
4153 int fd = PerlIO_fileno(PL_rsfp);
4154 fcntl(fd,F_SETFD,fd >= 3);
4157 /* Mark this internal pseudo-handle as clean */
4158 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
4160 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
4161 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
4162 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
4164 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
4165 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4166 /* if the script was opened in binmode, we need to revert
4167 * it to text mode for compatibility; but only iff it has CRs
4168 * XXX this is a questionable hack at best. */
4169 if (PL_bufend-PL_bufptr > 2
4170 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4173 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4174 loc = PerlIO_tell(PL_rsfp);
4175 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4177 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4179 PerlIO_seek(PL_rsfp, loc, 0);
4183 #ifdef PERLIO_LAYERS
4184 if (UTF && !IN_BYTE)
4185 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4198 if (PL_expect == XSTATE) {
4205 if (*s == ':' && s[1] == ':') {
4208 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4209 if (!(tmp = keyword(PL_tokenbuf, len)))
4210 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4224 LOP(OP_ACCEPT,XTERM);
4230 LOP(OP_ATAN2,XTERM);
4236 LOP(OP_BINMODE,XTERM);
4239 LOP(OP_BLESS,XTERM);
4248 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4265 if (!PL_cryptseen) {
4266 PL_cryptseen = TRUE;
4270 LOP(OP_CRYPT,XTERM);
4273 if (ckWARN(WARN_CHMOD)) {
4274 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4275 if (*d != '0' && isDIGIT(*d))
4276 Perl_warner(aTHX_ WARN_CHMOD,
4277 "chmod() mode argument is missing initial 0");
4279 LOP(OP_CHMOD,XTERM);
4282 LOP(OP_CHOWN,XTERM);
4285 LOP(OP_CONNECT,XTERM);
4301 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4305 PL_hints |= HINT_BLOCK_SCOPE;
4315 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4316 LOP(OP_DBMOPEN,XTERM);
4322 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4329 yylval.ival = CopLINE(PL_curcop);
4343 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4344 UNIBRACK(OP_ENTEREVAL);
4359 case KEY_endhostent:
4365 case KEY_endservent:
4368 case KEY_endprotoent:
4379 yylval.ival = CopLINE(PL_curcop);
4381 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4383 if ((PL_bufend - p) >= 3 &&
4384 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4386 else if ((PL_bufend - p) >= 4 &&
4387 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4390 if (isIDFIRST_lazy_if(p,UTF)) {
4391 p = scan_ident(p, PL_bufend,
4392 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4396 Perl_croak(aTHX_ "Missing $ on loop variable");
4401 LOP(OP_FORMLINE,XTERM);
4407 LOP(OP_FCNTL,XTERM);
4413 LOP(OP_FLOCK,XTERM);
4422 LOP(OP_GREPSTART, XREF);
4425 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4440 case KEY_getpriority:
4441 LOP(OP_GETPRIORITY,XTERM);
4443 case KEY_getprotobyname:
4446 case KEY_getprotobynumber:
4447 LOP(OP_GPBYNUMBER,XTERM);
4449 case KEY_getprotoent:
4461 case KEY_getpeername:
4462 UNI(OP_GETPEERNAME);
4464 case KEY_gethostbyname:
4467 case KEY_gethostbyaddr:
4468 LOP(OP_GHBYADDR,XTERM);
4470 case KEY_gethostent:
4473 case KEY_getnetbyname:
4476 case KEY_getnetbyaddr:
4477 LOP(OP_GNBYADDR,XTERM);
4482 case KEY_getservbyname:
4483 LOP(OP_GSBYNAME,XTERM);
4485 case KEY_getservbyport:
4486 LOP(OP_GSBYPORT,XTERM);
4488 case KEY_getservent:
4491 case KEY_getsockname:
4492 UNI(OP_GETSOCKNAME);
4494 case KEY_getsockopt:
4495 LOP(OP_GSOCKOPT,XTERM);
4517 yylval.ival = CopLINE(PL_curcop);
4521 LOP(OP_INDEX,XTERM);
4527 LOP(OP_IOCTL,XTERM);
4539 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4571 LOP(OP_LISTEN,XTERM);
4580 s = scan_pat(s,OP_MATCH);
4581 TERM(sublex_start());
4584 LOP(OP_MAPSTART, XREF);
4587 LOP(OP_MKDIR,XTERM);
4590 LOP(OP_MSGCTL,XTERM);
4593 LOP(OP_MSGGET,XTERM);
4596 LOP(OP_MSGRCV,XTERM);
4599 LOP(OP_MSGSND,XTERM);
4605 if (isIDFIRST_lazy_if(s,UTF)) {
4606 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4607 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4609 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4610 if (!PL_in_my_stash) {
4613 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4621 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4628 if (PL_expect != XSTATE)
4629 yyerror("\"no\" not allowed in expression");
4630 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4631 s = force_version(s);
4636 if (*s == '(' || (s = skipspace(s), *s == '('))
4643 if (isIDFIRST_lazy_if(s,UTF)) {
4645 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4647 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4648 Perl_warner(aTHX_ WARN_PRECEDENCE,
4649 "Precedence problem: open %.*s should be open(%.*s)",
4655 yylval.ival = OP_OR;
4665 LOP(OP_OPEN_DIR,XTERM);
4668 checkcomma(s,PL_tokenbuf,"filehandle");
4672 checkcomma(s,PL_tokenbuf,"filehandle");
4691 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4695 LOP(OP_PIPE_OP,XTERM);
4698 s = scan_str(s,FALSE,FALSE);
4700 missingterm((char*)0);
4701 yylval.ival = OP_CONST;
4702 TERM(sublex_start());
4708 s = scan_str(s,FALSE,FALSE);
4710 missingterm((char*)0);
4712 if (SvCUR(PL_lex_stuff)) {
4715 d = SvPV_force(PL_lex_stuff, len);
4718 for (; isSPACE(*d) && len; --len, ++d) ;
4721 if (!warned && ckWARN(WARN_QW)) {
4722 for (; !isSPACE(*d) && len; --len, ++d) {
4724 Perl_warner(aTHX_ WARN_QW,
4725 "Possible attempt to separate words with commas");
4728 else if (*d == '#') {
4729 Perl_warner(aTHX_ WARN_QW,
4730 "Possible attempt to put comments in qw() list");
4736 for (; !isSPACE(*d) && len; --len, ++d) ;
4738 sv = newSVpvn(b, d-b);
4739 if (DO_UTF8(PL_lex_stuff))
4741 words = append_elem(OP_LIST, words,
4742 newSVOP(OP_CONST, 0, tokeq(sv)));
4746 PL_nextval[PL_nexttoke].opval = words;
4751 SvREFCNT_dec(PL_lex_stuff);
4752 PL_lex_stuff = Nullsv;
4758 s = scan_str(s,FALSE,FALSE);
4760 missingterm((char*)0);
4761 yylval.ival = OP_STRINGIFY;
4762 if (SvIVX(PL_lex_stuff) == '\'')
4763 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4764 TERM(sublex_start());
4767 s = scan_pat(s,OP_QR);
4768 TERM(sublex_start());
4771 s = scan_str(s,FALSE,FALSE);
4773 missingterm((char*)0);
4774 yylval.ival = OP_BACKTICK;
4776 TERM(sublex_start());
4783 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4784 s = force_version(s);
4787 *PL_tokenbuf = '\0';
4788 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4789 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4790 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4792 yyerror("<> should be quotes");
4800 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4804 LOP(OP_RENAME,XTERM);
4813 LOP(OP_RINDEX,XTERM);
4836 LOP(OP_REVERSE,XTERM);
4847 TERM(sublex_start());
4849 TOKEN(1); /* force error */
4858 LOP(OP_SELECT,XTERM);
4864 LOP(OP_SEMCTL,XTERM);
4867 LOP(OP_SEMGET,XTERM);
4870 LOP(OP_SEMOP,XTERM);
4876 LOP(OP_SETPGRP,XTERM);
4878 case KEY_setpriority:
4879 LOP(OP_SETPRIORITY,XTERM);
4881 case KEY_sethostent:
4887 case KEY_setservent:
4890 case KEY_setprotoent:
4900 LOP(OP_SEEKDIR,XTERM);
4902 case KEY_setsockopt:
4903 LOP(OP_SSOCKOPT,XTERM);
4909 LOP(OP_SHMCTL,XTERM);
4912 LOP(OP_SHMGET,XTERM);
4915 LOP(OP_SHMREAD,XTERM);
4918 LOP(OP_SHMWRITE,XTERM);
4921 LOP(OP_SHUTDOWN,XTERM);
4930 LOP(OP_SOCKET,XTERM);
4932 case KEY_socketpair:
4933 LOP(OP_SOCKPAIR,XTERM);
4936 checkcomma(s,PL_tokenbuf,"subroutine name");
4938 if (*s == ';' || *s == ')') /* probably a close */
4939 Perl_croak(aTHX_ "sort is now a reserved word");
4941 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4945 LOP(OP_SPLIT,XTERM);
4948 LOP(OP_SPRINTF,XTERM);
4951 LOP(OP_SPLICE,XTERM);
4966 LOP(OP_SUBSTR,XTERM);
4972 char tmpbuf[sizeof PL_tokenbuf];
4974 expectation attrful;
4975 bool have_name, have_proto;
4980 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4981 (*s == ':' && s[1] == ':'))
4984 attrful = XATTRBLOCK;
4985 /* remember buffer pos'n for later force_word */
4986 tboffset = s - PL_oldbufptr;
4987 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4988 if (strchr(tmpbuf, ':'))
4989 sv_setpv(PL_subname, tmpbuf);
4991 sv_setsv(PL_subname,PL_curstname);
4992 sv_catpvn(PL_subname,"::",2);
4993 sv_catpvn(PL_subname,tmpbuf,len);
5000 Perl_croak(aTHX_ "Missing name in \"my sub\"");
5001 PL_expect = XTERMBLOCK;
5002 attrful = XATTRTERM;
5003 sv_setpv(PL_subname,"?");
5007 if (key == KEY_format) {
5009 PL_lex_formbrack = PL_lex_brackets + 1;
5011 (void) force_word(PL_oldbufptr + tboffset, WORD,
5016 /* Look for a prototype */
5020 s = scan_str(s,FALSE,FALSE);
5022 Perl_croak(aTHX_ "Prototype not terminated");
5024 d = SvPVX(PL_lex_stuff);
5026 for (p = d; *p; ++p) {
5031 SvCUR(PL_lex_stuff) = tmp;
5039 if (*s == ':' && s[1] != ':')
5040 PL_expect = attrful;
5043 PL_nextval[PL_nexttoke].opval =
5044 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
5045 PL_lex_stuff = Nullsv;
5049 sv_setpv(PL_subname,"__ANON__");
5052 (void) force_word(PL_oldbufptr + tboffset, WORD,
5061 LOP(OP_SYSTEM,XREF);
5064 LOP(OP_SYMLINK,XTERM);
5067 LOP(OP_SYSCALL,XTERM);
5070 LOP(OP_SYSOPEN,XTERM);
5073 LOP(OP_SYSSEEK,XTERM);
5076 LOP(OP_SYSREAD,XTERM);
5079 LOP(OP_SYSWRITE,XTERM);
5083 TERM(sublex_start());
5104 LOP(OP_TRUNCATE,XTERM);
5116 yylval.ival = CopLINE(PL_curcop);
5120 yylval.ival = CopLINE(PL_curcop);
5124 LOP(OP_UNLINK,XTERM);
5130 LOP(OP_UNPACK,XTERM);
5133 LOP(OP_UTIME,XTERM);
5136 if (ckWARN(WARN_UMASK)) {
5137 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
5138 if (*d != '0' && isDIGIT(*d))
5139 Perl_warner(aTHX_ WARN_UMASK,
5140 "umask: argument is missing initial 0");
5145 LOP(OP_UNSHIFT,XTERM);
5148 if (PL_expect != XSTATE)
5149 yyerror("\"use\" not allowed in expression");
5151 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
5152 s = force_version(s);
5153 if (*s == ';' || (s = skipspace(s), *s == ';')) {
5154 PL_nextval[PL_nexttoke].opval = Nullop;
5159 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5160 s = force_version(s);
5172 yylval.ival = CopLINE(PL_curcop);
5176 PL_hints |= HINT_BLOCK_SCOPE;
5183 LOP(OP_WAITPID,XTERM);
5191 static char ctl_l[2];
5193 if (ctl_l[0] == '\0')
5194 ctl_l[0] = toCTRL('L');
5195 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5198 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5203 if (PL_expect == XOPERATOR)
5209 yylval.ival = OP_XOR;
5214 TERM(sublex_start());
5219 #pragma segment Main
5223 Perl_keyword(pTHX_ register char *d, I32 len)
5228 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5229 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5230 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5231 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5232 if (strEQ(d,"__END__")) return KEY___END__;
5236 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5241 if (strEQ(d,"and")) return -KEY_and;
5242 if (strEQ(d,"abs")) return -KEY_abs;
5245 if (strEQ(d,"alarm")) return -KEY_alarm;
5246 if (strEQ(d,"atan2")) return -KEY_atan2;
5249 if (strEQ(d,"accept")) return -KEY_accept;
5254 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5257 if (strEQ(d,"bless")) return -KEY_bless;
5258 if (strEQ(d,"bind")) return -KEY_bind;
5259 if (strEQ(d,"binmode")) return -KEY_binmode;
5262 if (strEQ(d,"CORE")) return -KEY_CORE;
5263 if (strEQ(d,"CHECK")) return KEY_CHECK;
5268 if (strEQ(d,"cmp")) return -KEY_cmp;
5269 if (strEQ(d,"chr")) return -KEY_chr;
5270 if (strEQ(d,"cos")) return -KEY_cos;
5273 if (strEQ(d,"chop")) return -KEY_chop;
5276 if (strEQ(d,"close")) return -KEY_close;
5277 if (strEQ(d,"chdir")) return -KEY_chdir;
5278 if (strEQ(d,"chomp")) return -KEY_chomp;
5279 if (strEQ(d,"chmod")) return -KEY_chmod;
5280 if (strEQ(d,"chown")) return -KEY_chown;
5281 if (strEQ(d,"crypt")) return -KEY_crypt;
5284 if (strEQ(d,"chroot")) return -KEY_chroot;
5285 if (strEQ(d,"caller")) return -KEY_caller;
5288 if (strEQ(d,"connect")) return -KEY_connect;
5291 if (strEQ(d,"closedir")) return -KEY_closedir;
5292 if (strEQ(d,"continue")) return -KEY_continue;
5297 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5302 if (strEQ(d,"do")) return KEY_do;
5305 if (strEQ(d,"die")) return -KEY_die;
5308 if (strEQ(d,"dump")) return -KEY_dump;
5311 if (strEQ(d,"delete")) return KEY_delete;
5314 if (strEQ(d,"defined")) return KEY_defined;
5315 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5318 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5323 if (strEQ(d,"END")) return KEY_END;
5328 if (strEQ(d,"eq")) return -KEY_eq;
5331 if (strEQ(d,"eof")) return -KEY_eof;
5332 if (strEQ(d,"exp")) return -KEY_exp;
5335 if (strEQ(d,"else")) return KEY_else;
5336 if (strEQ(d,"exit")) return -KEY_exit;
5337 if (strEQ(d,"eval")) return KEY_eval;
5338 if (strEQ(d,"exec")) return -KEY_exec;
5339 if (strEQ(d,"each")) return -KEY_each;
5342 if (strEQ(d,"elsif")) return KEY_elsif;
5345 if (strEQ(d,"exists")) return KEY_exists;
5346 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5349 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5350 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5353 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5356 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5357 if (strEQ(d,"endservent")) return -KEY_endservent;
5360 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5367 if (strEQ(d,"for")) return KEY_for;
5370 if (strEQ(d,"fork")) return -KEY_fork;
5373 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5374 if (strEQ(d,"flock")) return -KEY_flock;
5377 if (strEQ(d,"format")) return KEY_format;
5378 if (strEQ(d,"fileno")) return -KEY_fileno;
5381 if (strEQ(d,"foreach")) return KEY_foreach;
5384 if (strEQ(d,"formline")) return -KEY_formline;
5389 if (strnEQ(d,"get",3)) {
5394 if (strEQ(d,"ppid")) return -KEY_getppid;
5395 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5398 if (strEQ(d,"pwent")) return -KEY_getpwent;
5399 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5400 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5403 if (strEQ(d,"peername")) return -KEY_getpeername;
5404 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5405 if (strEQ(d,"priority")) return -KEY_getpriority;
5408 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5411 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5415 else if (*d == 'h') {
5416 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5417 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5418 if (strEQ(d,"hostent")) return -KEY_gethostent;
5420 else if (*d == 'n') {
5421 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5422 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5423 if (strEQ(d,"netent")) return -KEY_getnetent;
5425 else if (*d == 's') {
5426 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5427 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5428 if (strEQ(d,"servent")) return -KEY_getservent;
5429 if (strEQ(d,"sockname")) return -KEY_getsockname;
5430 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5432 else if (*d == 'g') {
5433 if (strEQ(d,"grent")) return -KEY_getgrent;
5434 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5435 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5437 else if (*d == 'l') {
5438 if (strEQ(d,"login")) return -KEY_getlogin;
5440 else if (strEQ(d,"c")) return -KEY_getc;
5445 if (strEQ(d,"gt")) return -KEY_gt;
5446 if (strEQ(d,"ge")) return -KEY_ge;
5449 if (strEQ(d,"grep")) return KEY_grep;
5450 if (strEQ(d,"goto")) return KEY_goto;
5451 if (strEQ(d,"glob")) return KEY_glob;
5454 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5459 if (strEQ(d,"hex")) return -KEY_hex;
5462 if (strEQ(d,"INIT")) return KEY_INIT;
5467 if (strEQ(d,"if")) return KEY_if;
5470 if (strEQ(d,"int")) return -KEY_int;
5473 if (strEQ(d,"index")) return -KEY_index;
5474 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5479 if (strEQ(d,"join")) return -KEY_join;
5483 if (strEQ(d,"keys")) return -KEY_keys;
5484 if (strEQ(d,"kill")) return -KEY_kill;
5490 if (strEQ(d,"lt")) return -KEY_lt;
5491 if (strEQ(d,"le")) return -KEY_le;
5492 if (strEQ(d,"lc")) return -KEY_lc;
5495 if (strEQ(d,"log")) return -KEY_log;
5498 if (strEQ(d,"last")) return KEY_last;
5499 if (strEQ(d,"link")) return -KEY_link;
5500 if (strEQ(d,"lock")) return -KEY_lock;
5503 if (strEQ(d,"local")) return KEY_local;
5504 if (strEQ(d,"lstat")) return -KEY_lstat;
5507 if (strEQ(d,"length")) return -KEY_length;
5508 if (strEQ(d,"listen")) return -KEY_listen;
5511 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5514 if (strEQ(d,"localtime")) return -KEY_localtime;
5520 case 1: return KEY_m;
5522 if (strEQ(d,"my")) return KEY_my;
5525 if (strEQ(d,"map")) return KEY_map;
5528 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5531 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5532 if (strEQ(d,"msgget")) return -KEY_msgget;
5533 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5534 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5539 if (strEQ(d,"next")) return KEY_next;
5540 if (strEQ(d,"ne")) return -KEY_ne;
5541 if (strEQ(d,"not")) return -KEY_not;
5542 if (strEQ(d,"no")) return KEY_no;
5547 if (strEQ(d,"or")) return -KEY_or;
5550 if (strEQ(d,"ord")) return -KEY_ord;
5551 if (strEQ(d,"oct")) return -KEY_oct;
5552 if (strEQ(d,"our")) return KEY_our;
5555 if (strEQ(d,"open")) return -KEY_open;
5558 if (strEQ(d,"opendir")) return -KEY_opendir;
5565 if (strEQ(d,"pop")) return -KEY_pop;
5566 if (strEQ(d,"pos")) return KEY_pos;
5569 if (strEQ(d,"push")) return -KEY_push;
5570 if (strEQ(d,"pack")) return -KEY_pack;
5571 if (strEQ(d,"pipe")) return -KEY_pipe;
5574 if (strEQ(d,"print")) return KEY_print;
5577 if (strEQ(d,"printf")) return KEY_printf;
5580 if (strEQ(d,"package")) return KEY_package;
5583 if (strEQ(d,"prototype")) return KEY_prototype;
5588 if (strEQ(d,"q")) return KEY_q;
5589 if (strEQ(d,"qr")) return KEY_qr;
5590 if (strEQ(d,"qq")) return KEY_qq;
5591 if (strEQ(d,"qw")) return KEY_qw;
5592 if (strEQ(d,"qx")) return KEY_qx;
5594 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5599 if (strEQ(d,"ref")) return -KEY_ref;
5602 if (strEQ(d,"read")) return -KEY_read;
5603 if (strEQ(d,"rand")) return -KEY_rand;
5604 if (strEQ(d,"recv")) return -KEY_recv;
5605 if (strEQ(d,"redo")) return KEY_redo;
5608 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5609 if (strEQ(d,"reset")) return -KEY_reset;
5612 if (strEQ(d,"return")) return KEY_return;
5613 if (strEQ(d,"rename")) return -KEY_rename;
5614 if (strEQ(d,"rindex")) return -KEY_rindex;
5617 if (strEQ(d,"require")) return -KEY_require;
5618 if (strEQ(d,"reverse")) return -KEY_reverse;
5619 if (strEQ(d,"readdir")) return -KEY_readdir;
5622 if (strEQ(d,"readlink")) return -KEY_readlink;
5623 if (strEQ(d,"readline")) return -KEY_readline;
5624 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5627 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5633 case 0: return KEY_s;
5635 if (strEQ(d,"scalar")) return KEY_scalar;
5640 if (strEQ(d,"seek")) return -KEY_seek;
5641 if (strEQ(d,"send")) return -KEY_send;
5644 if (strEQ(d,"semop")) return -KEY_semop;
5647 if (strEQ(d,"select")) return -KEY_select;
5648 if (strEQ(d,"semctl")) return -KEY_semctl;
5649 if (strEQ(d,"semget")) return -KEY_semget;
5652 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5653 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5656 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5657 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5660 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5663 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5664 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5665 if (strEQ(d,"setservent")) return -KEY_setservent;
5668 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5669 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5676 if (strEQ(d,"shift")) return -KEY_shift;
5679 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5680 if (strEQ(d,"shmget")) return -KEY_shmget;
5683 if (strEQ(d,"shmread")) return -KEY_shmread;
5686 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5687 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5692 if (strEQ(d,"sin")) return -KEY_sin;
5695 if (strEQ(d,"sleep")) return -KEY_sleep;
5698 if (strEQ(d,"sort")) return KEY_sort;
5699 if (strEQ(d,"socket")) return -KEY_socket;
5700 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5703 if (strEQ(d,"split")) return KEY_split;
5704 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5705 if (strEQ(d,"splice")) return -KEY_splice;
5708 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5711 if (strEQ(d,"srand")) return -KEY_srand;
5714 if (strEQ(d,"stat")) return -KEY_stat;
5715 if (strEQ(d,"study")) return KEY_study;
5718 if (strEQ(d,"substr")) return -KEY_substr;
5719 if (strEQ(d,"sub")) return KEY_sub;
5724 if (strEQ(d,"system")) return -KEY_system;
5727 if (strEQ(d,"symlink")) return -KEY_symlink;
5728 if (strEQ(d,"syscall")) return -KEY_syscall;
5729 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5730 if (strEQ(d,"sysread")) return -KEY_sysread;
5731 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5734 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5743 if (strEQ(d,"tr")) return KEY_tr;
5746 if (strEQ(d,"tie")) return KEY_tie;
5749 if (strEQ(d,"tell")) return -KEY_tell;
5750 if (strEQ(d,"tied")) return KEY_tied;
5751 if (strEQ(d,"time")) return -KEY_time;
5754 if (strEQ(d,"times")) return -KEY_times;
5757 if (strEQ(d,"telldir")) return -KEY_telldir;
5760 if (strEQ(d,"truncate")) return -KEY_truncate;
5767 if (strEQ(d,"uc")) return -KEY_uc;
5770 if (strEQ(d,"use")) return KEY_use;
5773 if (strEQ(d,"undef")) return KEY_undef;
5774 if (strEQ(d,"until")) return KEY_until;
5775 if (strEQ(d,"untie")) return KEY_untie;
5776 if (strEQ(d,"utime")) return -KEY_utime;
5777 if (strEQ(d,"umask")) return -KEY_umask;
5780 if (strEQ(d,"unless")) return KEY_unless;
5781 if (strEQ(d,"unpack")) return -KEY_unpack;
5782 if (strEQ(d,"unlink")) return -KEY_unlink;
5785 if (strEQ(d,"unshift")) return -KEY_unshift;
5786 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5791 if (strEQ(d,"values")) return -KEY_values;
5792 if (strEQ(d,"vec")) return -KEY_vec;
5797 if (strEQ(d,"warn")) return -KEY_warn;
5798 if (strEQ(d,"wait")) return -KEY_wait;
5801 if (strEQ(d,"while")) return KEY_while;
5802 if (strEQ(d,"write")) return -KEY_write;
5805 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5808 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5813 if (len == 1) return -KEY_x;
5814 if (strEQ(d,"xor")) return -KEY_xor;
5817 if (len == 1) return KEY_y;
5826 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5830 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5831 if (ckWARN(WARN_SYNTAX)) {
5833 for (w = s+2; *w && level; w++) {
5840 for (; *w && isSPACE(*w); w++) ;
5841 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5842 Perl_warner(aTHX_ WARN_SYNTAX,
5843 "%s (...) interpreted as function",name);
5846 while (s < PL_bufend && isSPACE(*s))
5850 while (s < PL_bufend && isSPACE(*s))
5852 if (isIDFIRST_lazy_if(s,UTF)) {
5854 while (isALNUM_lazy_if(s,UTF))
5856 while (s < PL_bufend && isSPACE(*s))
5861 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5865 Perl_croak(aTHX_ "No comma allowed after %s", what);
5870 /* Either returns sv, or mortalizes sv and returns a new SV*.
5871 Best used as sv=new_constant(..., sv, ...).
5872 If s, pv are NULL, calls subroutine with one argument,
5873 and type is used with error messages only. */
5876 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5880 HV *table = GvHV(PL_hintgv); /* ^H */
5884 const char *why1, *why2, *why3;
5886 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5889 why2 = strEQ(key,"charnames")
5890 ? "(possibly a missing \"use charnames ...\")"
5892 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
5893 (type ? type: "undef"), why2);
5895 /* This is convoluted and evil ("goto considered harmful")
5896 * but I do not understand the intricacies of all the different
5897 * failure modes of %^H in here. The goal here is to make
5898 * the most probable error message user-friendly. --jhi */
5903 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
5904 (type ? type: "undef"), why1, why2, why3);
5906 yyerror(SvPVX(msg));
5910 cvp = hv_fetch(table, key, strlen(key), FALSE);
5911 if (!cvp || !SvOK(*cvp)) {
5914 why3 = "} is not defined";
5917 sv_2mortal(sv); /* Parent created it permanently */
5920 pv = sv_2mortal(newSVpvn(s, len));
5922 typesv = sv_2mortal(newSVpv(type, 0));
5924 typesv = &PL_sv_undef;
5926 PUSHSTACKi(PERLSI_OVERLOAD);
5938 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5942 /* Check the eval first */
5943 if (!PL_in_eval && SvTRUE(ERRSV)) {
5945 sv_catpv(ERRSV, "Propagated");
5946 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5948 res = SvREFCNT_inc(sv);
5952 (void)SvREFCNT_inc(res);
5961 why1 = "Call to &{$^H{";
5963 why3 = "}} did not return a defined value";
5972 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5974 register char *d = dest;
5975 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5978 Perl_croak(aTHX_ ident_too_long);
5979 if (isALNUM(*s)) /* UTF handled below */
5981 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5986 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5990 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
5991 char *t = s + UTF8SKIP(s);
5992 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
5994 if (d + (t - s) > e)
5995 Perl_croak(aTHX_ ident_too_long);
5996 Copy(s, d, t - s, char);
6009 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
6019 e = d + destlen - 3; /* two-character token, ending NUL */
6021 while (isDIGIT(*s)) {
6023 Perl_croak(aTHX_ ident_too_long);
6030 Perl_croak(aTHX_ ident_too_long);
6031 if (isALNUM(*s)) /* UTF handled below */
6033 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
6038 else if (*s == ':' && s[1] == ':') {
6042 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6043 char *t = s + UTF8SKIP(s);
6044 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6046 if (d + (t - s) > e)
6047 Perl_croak(aTHX_ ident_too_long);
6048 Copy(s, d, t - s, char);
6059 if (PL_lex_state != LEX_NORMAL)
6060 PL_lex_state = LEX_INTERPENDMAYBE;
6063 if (*s == '$' && s[1] &&
6064 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
6077 if (*d == '^' && *s && isCONTROLVAR(*s)) {
6082 if (isSPACE(s[-1])) {
6085 if (!SPACE_OR_TAB(ch)) {
6091 if (isIDFIRST_lazy_if(d,UTF)) {
6095 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
6097 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
6100 Copy(s, d, e - s, char);
6105 while ((isALNUM(*s) || *s == ':') && d < e)
6108 Perl_croak(aTHX_ ident_too_long);
6111 while (s < send && SPACE_OR_TAB(*s)) s++;
6112 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
6113 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
6114 const char *brack = *s == '[' ? "[...]" : "{...}";
6115 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6116 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
6117 funny, dest, brack, funny, dest, brack);
6120 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
6124 /* Handle extended ${^Foo} variables
6125 * 1999-02-27 mjd-perl-patch@plover.com */
6126 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6130 while (isALNUM(*s) && d < e) {
6134 Perl_croak(aTHX_ ident_too_long);
6139 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6140 PL_lex_state = LEX_INTERPEND;
6143 if (PL_lex_state == LEX_NORMAL) {
6144 if (ckWARN(WARN_AMBIGUOUS) &&
6145 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
6147 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6148 "Ambiguous use of %c{%s} resolved to %c%s",
6149 funny, dest, funny, dest);
6154 s = bracket; /* let the parser handle it */
6158 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6159 PL_lex_state = LEX_INTERPEND;
6164 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
6169 *pmfl |= PMf_GLOBAL;
6171 *pmfl |= PMf_CONTINUE;
6175 *pmfl |= PMf_MULTILINE;
6177 *pmfl |= PMf_SINGLELINE;
6179 *pmfl |= PMf_EXTENDED;
6183 S_scan_pat(pTHX_ char *start, I32 type)
6188 s = scan_str(start,FALSE,FALSE);
6190 Perl_croak(aTHX_ "Search pattern not terminated");
6192 pm = (PMOP*)newPMOP(type, 0);
6193 if (PL_multi_open == '?')
6194 pm->op_pmflags |= PMf_ONCE;
6196 while (*s && strchr("iomsx", *s))
6197 pmflag(&pm->op_pmflags,*s++);
6200 while (*s && strchr("iogcmsx", *s))
6201 pmflag(&pm->op_pmflags,*s++);
6203 pm->op_pmpermflags = pm->op_pmflags;
6205 PL_lex_op = (OP*)pm;
6206 yylval.ival = OP_MATCH;
6211 S_scan_subst(pTHX_ char *start)
6218 yylval.ival = OP_NULL;
6220 s = scan_str(start,FALSE,FALSE);
6223 Perl_croak(aTHX_ "Substitution pattern not terminated");
6225 if (s[-1] == PL_multi_open)
6228 first_start = PL_multi_start;
6229 s = scan_str(s,FALSE,FALSE);
6232 SvREFCNT_dec(PL_lex_stuff);
6233 PL_lex_stuff = Nullsv;
6235 Perl_croak(aTHX_ "Substitution replacement not terminated");
6237 PL_multi_start = first_start; /* so whole substitution is taken together */
6239 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6245 else if (strchr("iogcmsx", *s))
6246 pmflag(&pm->op_pmflags,*s++);
6253 PL_sublex_info.super_bufptr = s;
6254 PL_sublex_info.super_bufend = PL_bufend;
6256 pm->op_pmflags |= PMf_EVAL;
6257 repl = newSVpvn("",0);
6259 sv_catpv(repl, es ? "eval " : "do ");
6260 sv_catpvn(repl, "{ ", 2);
6261 sv_catsv(repl, PL_lex_repl);
6262 sv_catpvn(repl, " };", 2);
6264 SvREFCNT_dec(PL_lex_repl);
6268 pm->op_pmpermflags = pm->op_pmflags;
6269 PL_lex_op = (OP*)pm;
6270 yylval.ival = OP_SUBST;
6275 S_scan_trans(pTHX_ char *start)
6284 yylval.ival = OP_NULL;
6286 s = scan_str(start,FALSE,FALSE);
6288 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6289 if (s[-1] == PL_multi_open)
6292 s = scan_str(s,FALSE,FALSE);
6295 SvREFCNT_dec(PL_lex_stuff);
6296 PL_lex_stuff = Nullsv;
6298 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6301 complement = del = squash = 0;
6302 while (strchr("cds", *s)) {
6304 complement = OPpTRANS_COMPLEMENT;
6306 del = OPpTRANS_DELETE;
6308 squash = OPpTRANS_SQUASH;
6312 New(803, tbl, complement&&!del?258:256, short);
6313 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6314 o->op_private = del|squash|complement|
6315 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6316 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
6319 yylval.ival = OP_TRANS;
6324 S_scan_heredoc(pTHX_ register char *s)
6327 I32 op_type = OP_SCALAR;
6334 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6338 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6341 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6342 if (*peek && strchr("`'\"",*peek)) {
6345 s = delimcpy(d, e, s, PL_bufend, term, &len);
6355 if (!isALNUM_lazy_if(s,UTF))
6356 deprecate("bare << to mean <<\"\"");
6357 for (; isALNUM_lazy_if(s,UTF); s++) {
6362 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6363 Perl_croak(aTHX_ "Delimiter for here document is too long");
6366 len = d - PL_tokenbuf;
6367 #ifndef PERL_STRICT_CR
6368 d = strchr(s, '\r');
6372 while (s < PL_bufend) {
6378 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6387 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6392 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6393 herewas = newSVpvn(s,PL_bufend-s);
6395 s--, herewas = newSVpvn(s,d-s);
6396 s += SvCUR(herewas);
6398 tmpstr = NEWSV(87,79);
6399 sv_upgrade(tmpstr, SVt_PVIV);
6404 else if (term == '`') {
6405 op_type = OP_BACKTICK;
6406 SvIVX(tmpstr) = '\\';
6410 PL_multi_start = CopLINE(PL_curcop);
6411 PL_multi_open = PL_multi_close = '<';
6412 term = *PL_tokenbuf;
6413 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6414 char *bufptr = PL_sublex_info.super_bufptr;
6415 char *bufend = PL_sublex_info.super_bufend;
6416 char *olds = s - SvCUR(herewas);
6417 s = strchr(bufptr, '\n');
6421 while (s < bufend &&
6422 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6424 CopLINE_inc(PL_curcop);
6427 CopLINE_set(PL_curcop, PL_multi_start);
6428 missingterm(PL_tokenbuf);
6430 sv_setpvn(herewas,bufptr,d-bufptr+1);
6431 sv_setpvn(tmpstr,d+1,s-d);
6433 sv_catpvn(herewas,s,bufend-s);
6434 (void)strcpy(bufptr,SvPVX(herewas));
6441 while (s < PL_bufend &&
6442 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6444 CopLINE_inc(PL_curcop);
6446 if (s >= PL_bufend) {
6447 CopLINE_set(PL_curcop, PL_multi_start);
6448 missingterm(PL_tokenbuf);
6450 sv_setpvn(tmpstr,d+1,s-d);
6452 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6454 sv_catpvn(herewas,s,PL_bufend-s);
6455 sv_setsv(PL_linestr,herewas);
6456 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6457 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6458 PL_last_lop = PL_last_uni = Nullch;
6461 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6462 while (s >= PL_bufend) { /* multiple line string? */
6464 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6465 CopLINE_set(PL_curcop, PL_multi_start);
6466 missingterm(PL_tokenbuf);
6468 CopLINE_inc(PL_curcop);
6469 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6470 PL_last_lop = PL_last_uni = Nullch;
6471 #ifndef PERL_STRICT_CR
6472 if (PL_bufend - PL_linestart >= 2) {
6473 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6474 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6476 PL_bufend[-2] = '\n';
6478 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6480 else if (PL_bufend[-1] == '\r')
6481 PL_bufend[-1] = '\n';
6483 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6484 PL_bufend[-1] = '\n';
6486 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6487 SV *sv = NEWSV(88,0);
6489 sv_upgrade(sv, SVt_PVMG);
6490 sv_setsv(sv,PL_linestr);
6491 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6493 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6496 sv_catsv(PL_linestr,herewas);
6497 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6501 sv_catsv(tmpstr,PL_linestr);
6506 PL_multi_end = CopLINE(PL_curcop);
6507 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6508 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6509 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6511 SvREFCNT_dec(herewas);
6512 if (UTF && !IN_BYTE && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
6514 PL_lex_stuff = tmpstr;
6515 yylval.ival = op_type;
6520 takes: current position in input buffer
6521 returns: new position in input buffer
6522 side-effects: yylval and lex_op are set.
6527 <FH> read from filehandle
6528 <pkg::FH> read from package qualified filehandle
6529 <pkg'FH> read from package qualified filehandle
6530 <$fh> read from filehandle in $fh
6536 S_scan_inputsymbol(pTHX_ char *start)
6538 register char *s = start; /* current position in buffer */
6544 d = PL_tokenbuf; /* start of temp holding space */
6545 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6546 end = strchr(s, '\n');
6549 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6551 /* die if we didn't have space for the contents of the <>,
6552 or if it didn't end, or if we see a newline
6555 if (len >= sizeof PL_tokenbuf)
6556 Perl_croak(aTHX_ "Excessively long <> operator");
6558 Perl_croak(aTHX_ "Unterminated <> operator");
6563 Remember, only scalar variables are interpreted as filehandles by
6564 this code. Anything more complex (e.g., <$fh{$num}>) will be
6565 treated as a glob() call.
6566 This code makes use of the fact that except for the $ at the front,
6567 a scalar variable and a filehandle look the same.
6569 if (*d == '$' && d[1]) d++;
6571 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6572 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6575 /* If we've tried to read what we allow filehandles to look like, and
6576 there's still text left, then it must be a glob() and not a getline.
6577 Use scan_str to pull out the stuff between the <> and treat it
6578 as nothing more than a string.
6581 if (d - PL_tokenbuf != len) {
6582 yylval.ival = OP_GLOB;
6584 s = scan_str(start,FALSE,FALSE);
6586 Perl_croak(aTHX_ "Glob not terminated");
6590 /* we're in a filehandle read situation */
6593 /* turn <> into <ARGV> */
6595 (void)strcpy(d,"ARGV");
6597 /* if <$fh>, create the ops to turn the variable into a
6603 /* try to find it in the pad for this block, otherwise find
6604 add symbol table ops
6606 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6607 OP *o = newOP(OP_PADSV, 0);
6609 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6612 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6613 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6614 newUNOP(OP_RV2SV, 0,
6615 newGVOP(OP_GV, 0, gv)));
6617 PL_lex_op->op_flags |= OPf_SPECIAL;
6618 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6619 yylval.ival = OP_NULL;
6622 /* If it's none of the above, it must be a literal filehandle
6623 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6625 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6626 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6627 yylval.ival = OP_NULL;
6636 takes: start position in buffer
6637 keep_quoted preserve \ on the embedded delimiter(s)
6638 keep_delims preserve the delimiters around the string
6639 returns: position to continue reading from buffer
6640 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6641 updates the read buffer.
6643 This subroutine pulls a string out of the input. It is called for:
6644 q single quotes q(literal text)
6645 ' single quotes 'literal text'
6646 qq double quotes qq(interpolate $here please)
6647 " double quotes "interpolate $here please"
6648 qx backticks qx(/bin/ls -l)
6649 ` backticks `/bin/ls -l`
6650 qw quote words @EXPORT_OK = qw( func() $spam )
6651 m// regexp match m/this/
6652 s/// regexp substitute s/this/that/
6653 tr/// string transliterate tr/this/that/
6654 y/// string transliterate y/this/that/
6655 ($*@) sub prototypes sub foo ($)
6656 (stuff) sub attr parameters sub foo : attr(stuff)
6657 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6659 In most of these cases (all but <>, patterns and transliterate)
6660 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6661 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6662 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6665 It skips whitespace before the string starts, and treats the first
6666 character as the delimiter. If the delimiter is one of ([{< then
6667 the corresponding "close" character )]}> is used as the closing
6668 delimiter. It allows quoting of delimiters, and if the string has
6669 balanced delimiters ([{<>}]) it allows nesting.
6671 On success, the SV with the resulting string is put into lex_stuff or,
6672 if that is already non-NULL, into lex_repl. The second case occurs only
6673 when parsing the RHS of the special constructs s/// and tr/// (y///).
6674 For convenience, the terminating delimiter character is stuffed into
6679 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6681 SV *sv; /* scalar value: string */
6682 char *tmps; /* temp string, used for delimiter matching */
6683 register char *s = start; /* current position in the buffer */
6684 register char term; /* terminating character */
6685 register char *to; /* current position in the sv's data */
6686 I32 brackets = 1; /* bracket nesting level */
6687 bool has_utf8 = FALSE; /* is there any utf8 content? */
6689 /* skip space before the delimiter */
6693 /* mark where we are, in case we need to report errors */
6696 /* after skipping whitespace, the next character is the terminator */
6698 if (UTF8_IS_CONTINUED(term) && UTF)
6701 /* mark where we are */
6702 PL_multi_start = CopLINE(PL_curcop);
6703 PL_multi_open = term;
6705 /* find corresponding closing delimiter */
6706 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6708 PL_multi_close = term;
6710 /* create a new SV to hold the contents. 87 is leak category, I'm
6711 assuming. 79 is the SV's initial length. What a random number. */
6713 sv_upgrade(sv, SVt_PVIV);
6715 (void)SvPOK_only(sv); /* validate pointer */
6717 /* move past delimiter and try to read a complete string */
6719 sv_catpvn(sv, s, 1);
6722 /* extend sv if need be */
6723 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6724 /* set 'to' to the next character in the sv's string */
6725 to = SvPVX(sv)+SvCUR(sv);
6727 /* if open delimiter is the close delimiter read unbridle */
6728 if (PL_multi_open == PL_multi_close) {
6729 for (; s < PL_bufend; s++,to++) {
6730 /* embedded newlines increment the current line number */
6731 if (*s == '\n' && !PL_rsfp)
6732 CopLINE_inc(PL_curcop);
6733 /* handle quoted delimiters */
6734 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6735 if (!keep_quoted && s[1] == term)
6737 /* any other quotes are simply copied straight through */
6741 /* terminate when run out of buffer (the for() condition), or
6742 have found the terminator */
6743 else if (*s == term)
6745 else if (!has_utf8 && UTF8_IS_CONTINUED(*s) && UTF)
6751 /* if the terminator isn't the same as the start character (e.g.,
6752 matched brackets), we have to allow more in the quoting, and
6753 be prepared for nested brackets.
6756 /* read until we run out of string, or we find the terminator */
6757 for (; s < PL_bufend; s++,to++) {
6758 /* embedded newlines increment the line count */
6759 if (*s == '\n' && !PL_rsfp)
6760 CopLINE_inc(PL_curcop);
6761 /* backslashes can escape the open or closing characters */
6762 if (*s == '\\' && s+1 < PL_bufend) {
6764 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6769 /* allow nested opens and closes */
6770 else if (*s == PL_multi_close && --brackets <= 0)
6772 else if (*s == PL_multi_open)
6774 else if (!has_utf8 && UTF8_IS_CONTINUED(*s) && UTF)
6779 /* terminate the copied string and update the sv's end-of-string */
6781 SvCUR_set(sv, to - SvPVX(sv));
6784 * this next chunk reads more into the buffer if we're not done yet
6788 break; /* handle case where we are done yet :-) */
6790 #ifndef PERL_STRICT_CR
6791 if (to - SvPVX(sv) >= 2) {
6792 if ((to[-2] == '\r' && to[-1] == '\n') ||
6793 (to[-2] == '\n' && to[-1] == '\r'))
6797 SvCUR_set(sv, to - SvPVX(sv));
6799 else if (to[-1] == '\r')
6802 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6806 /* if we're out of file, or a read fails, bail and reset the current
6807 line marker so we can report where the unterminated string began
6810 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6812 CopLINE_set(PL_curcop, PL_multi_start);
6815 /* we read a line, so increment our line counter */
6816 CopLINE_inc(PL_curcop);
6818 /* update debugger info */
6819 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6820 SV *sv = NEWSV(88,0);
6822 sv_upgrade(sv, SVt_PVMG);
6823 sv_setsv(sv,PL_linestr);
6824 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6827 /* having changed the buffer, we must update PL_bufend */
6828 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6829 PL_last_lop = PL_last_uni = Nullch;
6832 /* at this point, we have successfully read the delimited string */
6835 sv_catpvn(sv, s, 1);
6838 PL_multi_end = CopLINE(PL_curcop);
6841 /* if we allocated too much space, give some back */
6842 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6843 SvLEN_set(sv, SvCUR(sv) + 1);
6844 Renew(SvPVX(sv), SvLEN(sv), char);
6847 /* decide whether this is the first or second quoted string we've read
6860 takes: pointer to position in buffer
6861 returns: pointer to new position in buffer
6862 side-effects: builds ops for the constant in yylval.op
6864 Read a number in any of the formats that Perl accepts:
6866 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6867 [\d_]+(\.[\d_]*)?[Ee](\d+)
6869 Underbars (_) are allowed in decimal numbers. If -w is on,
6870 underbars before a decimal point must be at three digit intervals.
6872 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6875 If it reads a number without a decimal point or an exponent, it will
6876 try converting the number to an integer and see if it can do so
6877 without loss of precision.
6881 Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
6883 register char *s = start; /* current position in buffer */
6884 register char *d; /* destination in temp buffer */
6885 register char *e; /* end of temp buffer */
6886 NV nv; /* number read, as a double */
6887 SV *sv = Nullsv; /* place to put the converted number */
6888 bool floatit; /* boolean: int or float? */
6889 char *lastub = 0; /* position of last underbar */
6890 static char number_too_long[] = "Number too long";
6892 /* We use the first character to decide what type of number this is */
6896 Perl_croak(aTHX_ "panic: scan_num");
6898 /* if it starts with a 0, it could be an octal number, a decimal in
6899 0.13 disguise, or a hexadecimal number, or a binary number. */
6903 u holds the "number so far"
6904 shift the power of 2 of the base
6905 (hex == 4, octal == 3, binary == 1)
6906 overflowed was the number more than we can hold?
6908 Shift is used when we add a digit. It also serves as an "are
6909 we in octal/hex/binary?" indicator to disallow hex characters
6915 bool overflowed = FALSE;
6916 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6917 static char* bases[5] = { "", "binary", "", "octal",
6919 static char* Bases[5] = { "", "Binary", "", "Octal",
6921 static char *maxima[5] = { "",
6922 "0b11111111111111111111111111111111",
6926 char *base, *Base, *max;
6932 } else if (s[1] == 'b') {
6936 /* check for a decimal in disguise */
6937 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6939 /* so it must be octal */
6943 base = bases[shift];
6944 Base = Bases[shift];
6945 max = maxima[shift];
6947 /* read the rest of the number */
6949 /* x is used in the overflow test,
6950 b is the digit we're adding on. */
6955 /* if we don't mention it, we're done */
6964 /* 8 and 9 are not octal */
6967 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6971 case '2': case '3': case '4':
6972 case '5': case '6': case '7':
6974 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6978 b = *s++ & 15; /* ASCII digit -> value of digit */
6982 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6983 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6984 /* make sure they said 0x */
6989 /* Prepare to put the digit we have onto the end
6990 of the number so far. We check for overflows.
6995 x = u << shift; /* make room for the digit */
6997 if ((x >> shift) != u
6998 && !(PL_hints & HINT_NEW_BINARY)) {
7001 if (ckWARN_d(WARN_OVERFLOW))
7002 Perl_warner(aTHX_ WARN_OVERFLOW,
7003 "Integer overflow in %s number",
7006 u = x | b; /* add the digit to the end */
7009 n *= nvshift[shift];
7010 /* If an NV has not enough bits in its
7011 * mantissa to represent an UV this summing of
7012 * small low-order numbers is a waste of time
7013 * (because the NV cannot preserve the
7014 * low-order bits anyway): we could just
7015 * remember when did we overflow and in the
7016 * end just multiply n by the right
7024 /* if we get here, we had success: make a scalar value from
7030 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7031 Perl_warner(aTHX_ WARN_PORTABLE,
7032 "%s number > %s non-portable",
7038 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7039 Perl_warner(aTHX_ WARN_PORTABLE,
7040 "%s number > %s non-portable",
7045 if (PL_hints & HINT_NEW_BINARY)
7046 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
7051 handle decimal numbers.
7052 we're also sent here when we read a 0 as the first digit
7054 case '1': case '2': case '3': case '4': case '5':
7055 case '6': case '7': case '8': case '9': case '.':
7058 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
7061 /* read next group of digits and _ and copy into d */
7062 while (isDIGIT(*s) || *s == '_') {
7063 /* skip underscores, checking for misplaced ones
7067 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
7068 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7072 /* check for end of fixed-length buffer */
7074 Perl_croak(aTHX_ number_too_long);
7075 /* if we're ok, copy the character */
7080 /* final misplaced underbar check */
7081 if (lastub && s - lastub != 3) {
7082 if (ckWARN(WARN_SYNTAX))
7083 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7086 /* read a decimal portion if there is one. avoid
7087 3..5 being interpreted as the number 3. followed
7090 if (*s == '.' && s[1] != '.') {
7094 /* copy, ignoring underbars, until we run out of
7095 digits. Note: no misplaced underbar checks!
7097 for (; isDIGIT(*s) || *s == '_'; s++) {
7098 /* fixed length buffer check */
7100 Perl_croak(aTHX_ number_too_long);
7104 if (*s == '.' && isDIGIT(s[1])) {
7105 /* oops, it's really a v-string, but without the "v" */
7111 /* read exponent part, if present */
7112 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
7116 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
7117 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
7119 /* allow positive or negative exponent */
7120 if (*s == '+' || *s == '-')
7123 /* read digits of exponent (no underbars :-) */
7124 while (isDIGIT(*s)) {
7126 Perl_croak(aTHX_ number_too_long);
7131 /* terminate the string */
7134 /* make an sv from the string */
7137 #if defined(Strtol) && defined(Strtoul)
7140 strtol/strtoll sets errno to ERANGE if the number is too big
7141 for an integer. We try to do an integer conversion first
7142 if no characters indicating "float" have been found.
7149 if (*PL_tokenbuf == '-')
7150 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
7152 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
7154 floatit = TRUE; /* Probably just too large. */
7155 else if (*PL_tokenbuf == '-')
7157 else if (uv <= IV_MAX)
7158 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7163 nv = Atof(PL_tokenbuf);
7168 No working strtou?ll?.
7170 Unfortunately atol() doesn't do range checks (returning
7171 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7172 everywhere [1], so we cannot use use atol() (or atoll()).
7173 If we could, they would be used, as Atol(), very much like
7174 Strtol() and Strtoul() are used above.
7176 [1] XXX Configure test needed to check for atol()
7177 (and atoll()) overflow behaviour XXX
7181 We need to do this the hard way. */
7183 nv = Atof(PL_tokenbuf);
7185 /* See if we can make do with an integer value without loss of
7186 precision. We use U_V to cast to a UV, because some
7187 compilers have issues. Then we try casting it back and see
7188 if it was the same [1]. We only do this if we know we
7189 specifically read an integer. If floatit is true, then we
7190 don't need to do the conversion at all.
7192 [1] Note that this is lossy if our NVs cannot preserve our
7193 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7194 and NV_PRESERVES_UV_BITS (a number), but in general we really
7195 do hope all such potentially lossy platforms have strtou?ll?
7196 to do a lossless IV/UV conversion.
7198 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7199 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7200 as NV_DIG and NV_MANT_DIG)?
7206 if (!floatit && (NV)uv == nv) {
7208 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7216 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7217 (PL_hints & HINT_NEW_INTEGER) )
7218 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7219 (floatit ? "float" : "integer"),
7223 /* if it starts with a v, it could be a v-string */
7229 while (isDIGIT(*pos) || *pos == '_')
7231 if (!isALPHA(*pos)) {
7233 U8 tmpbuf[UTF8_MAXLEN+1];
7235 s++; /* get past 'v' */
7238 sv_setpvn(sv, "", 0);
7241 if (*s == '0' && isDIGIT(s[1]))
7242 yyerror("Octal number in vector unsupported");
7245 /* this is atoi() that tolerates underscores */
7248 while (--end >= s) {
7253 rev += (*end - '0') * mult;
7255 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7256 Perl_warner(aTHX_ WARN_OVERFLOW,
7257 "Integer overflow in decimal number");
7260 /* Append native character for the rev point */
7261 tmpend = uvchr_to_utf8(tmpbuf, rev);
7264 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7265 if (*pos == '.' && isDIGIT(pos[1]))
7271 while (isDIGIT(*pos) || *pos == '_')
7277 /* if (revmax > 127) { */
7280 sv_utf8_downgrade(sv, TRUE);
7287 /* make the op for the constant and return */
7290 lvalp->opval = newSVOP(OP_CONST, 0, sv);
7292 lvalp->opval = Nullop;
7298 S_scan_formline(pTHX_ register char *s)
7302 SV *stuff = newSVpvn("",0);
7303 bool needargs = FALSE;
7306 if (*s == '.' || *s == /*{*/'}') {
7308 #ifdef PERL_STRICT_CR
7309 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7311 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7313 if (*t == '\n' || t == PL_bufend)
7316 if (PL_in_eval && !PL_rsfp) {
7317 eol = strchr(s,'\n');
7322 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7324 for (t = s; t < eol; t++) {
7325 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7327 goto enough; /* ~~ must be first line in formline */
7329 if (*t == '@' || *t == '^')
7332 sv_catpvn(stuff, s, eol-s);
7333 #ifndef PERL_STRICT_CR
7334 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7335 char *end = SvPVX(stuff) + SvCUR(stuff);
7344 s = filter_gets(PL_linestr, PL_rsfp, 0);
7345 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7346 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7347 PL_last_lop = PL_last_uni = Nullch;
7350 yyerror("Format not terminated");
7360 PL_lex_state = LEX_NORMAL;
7361 PL_nextval[PL_nexttoke].ival = 0;
7365 PL_lex_state = LEX_FORMLINE;
7366 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7368 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7372 SvREFCNT_dec(stuff);
7373 PL_lex_formbrack = 0;
7384 PL_cshlen = strlen(PL_cshname);
7389 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7391 I32 oldsavestack_ix = PL_savestack_ix;
7392 CV* outsidecv = PL_compcv;
7396 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7398 SAVEI32(PL_subline);
7399 save_item(PL_subname);
7402 SAVESPTR(PL_comppad_name);
7403 SAVESPTR(PL_compcv);
7404 SAVEI32(PL_comppad_name_fill);
7405 SAVEI32(PL_min_intro_pending);
7406 SAVEI32(PL_max_intro_pending);
7407 SAVEI32(PL_pad_reset_pending);
7409 PL_compcv = (CV*)NEWSV(1104,0);
7410 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7411 CvFLAGS(PL_compcv) |= flags;
7413 PL_comppad = newAV();
7414 av_push(PL_comppad, Nullsv);
7415 PL_curpad = AvARRAY(PL_comppad);
7416 PL_comppad_name = newAV();
7417 PL_comppad_name_fill = 0;
7418 PL_min_intro_pending = 0;
7420 PL_subline = CopLINE(PL_curcop);
7422 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7423 PL_curpad[0] = (SV*)newAV();
7424 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7425 #endif /* USE_THREADS */
7427 comppadlist = newAV();
7428 AvREAL_off(comppadlist);
7429 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7430 av_store(comppadlist, 1, (SV*)PL_comppad);
7432 CvPADLIST(PL_compcv) = comppadlist;
7433 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7435 CvOWNER(PL_compcv) = 0;
7436 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7437 MUTEX_INIT(CvMUTEXP(PL_compcv));
7438 #endif /* USE_THREADS */
7440 return oldsavestack_ix;
7444 #pragma segment Perl_yylex
7447 Perl_yywarn(pTHX_ char *s)
7449 PL_in_eval |= EVAL_WARNONLY;
7451 PL_in_eval &= ~EVAL_WARNONLY;
7456 Perl_yyerror(pTHX_ char *s)
7459 char *context = NULL;
7463 if (!yychar || (yychar == ';' && !PL_rsfp))
7465 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7466 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7467 while (isSPACE(*PL_oldoldbufptr))
7469 context = PL_oldoldbufptr;
7470 contlen = PL_bufptr - PL_oldoldbufptr;
7472 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7473 PL_oldbufptr != PL_bufptr) {
7474 while (isSPACE(*PL_oldbufptr))
7476 context = PL_oldbufptr;
7477 contlen = PL_bufptr - PL_oldbufptr;
7479 else if (yychar > 255)
7480 where = "next token ???";
7481 #ifdef USE_PURE_BISON
7482 /* GNU Bison sets the value -2 */
7483 else if (yychar == -2) {
7485 else if ((yychar & 127) == 127) {
7487 if (PL_lex_state == LEX_NORMAL ||
7488 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7489 where = "at end of line";
7490 else if (PL_lex_inpat)
7491 where = "within pattern";
7493 where = "within string";
7496 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7498 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7499 else if (isPRINT_LC(yychar))
7500 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7502 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7503 where = SvPVX(where_sv);
7505 msg = sv_2mortal(newSVpv(s, 0));
7506 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7507 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7509 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7511 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7512 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7513 Perl_sv_catpvf(aTHX_ msg,
7514 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7515 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7518 if (PL_in_eval & EVAL_WARNONLY)
7519 Perl_warn(aTHX_ "%"SVf, msg);
7522 if (PL_error_count >= 10) {
7523 if (PL_in_eval && SvCUR(ERRSV))
7524 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7525 ERRSV, CopFILE(PL_curcop));
7527 Perl_croak(aTHX_ "%s has too many errors.\n",
7528 CopFILE(PL_curcop));
7531 PL_in_my_stash = Nullhv;
7535 #pragma segment Main
7539 S_swallow_bom(pTHX_ U8 *s)
7542 slen = SvCUR(PL_linestr);
7546 /* UTF-16 little-endian */
7547 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7548 Perl_croak(aTHX_ "Unsupported script encoding");
7549 #ifndef PERL_NO_UTF16_FILTER
7550 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7552 if (PL_bufend > (char*)s) {
7556 filter_add(utf16rev_textfilter, NULL);
7557 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7558 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7559 PL_bufend - (char*)s - 1,
7561 Copy(news, s, newlen, U8);
7562 SvCUR_set(PL_linestr, newlen);
7563 PL_bufend = SvPVX(PL_linestr) + newlen;
7564 news[newlen++] = '\0';
7568 Perl_croak(aTHX_ "Unsupported script encoding");
7573 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7574 #ifndef PERL_NO_UTF16_FILTER
7575 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7577 if (PL_bufend > (char *)s) {
7581 filter_add(utf16_textfilter, NULL);
7582 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7583 PL_bufend = (char*)utf16_to_utf8(s, news,
7584 PL_bufend - (char*)s,
7586 Copy(news, s, newlen, U8);
7587 SvCUR_set(PL_linestr, newlen);
7588 PL_bufend = SvPVX(PL_linestr) + newlen;
7589 news[newlen++] = '\0';
7593 Perl_croak(aTHX_ "Unsupported script encoding");
7598 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7599 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7604 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7605 s[2] == 0xFE && s[3] == 0xFF)
7607 Perl_croak(aTHX_ "Unsupported script encoding");
7619 * Restore a source filter.
7623 restore_rsfp(pTHXo_ void *f)
7625 PerlIO *fp = (PerlIO*)f;
7627 if (PL_rsfp == PerlIO_stdin())
7628 PerlIO_clearerr(PL_rsfp);
7629 else if (PL_rsfp && (PL_rsfp != fp))
7630 PerlIO_close(PL_rsfp);
7634 #ifndef PERL_NO_UTF16_FILTER
7636 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7638 I32 count = FILTER_READ(idx+1, sv, maxlen);
7643 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7644 if (!*SvPV_nolen(sv))
7645 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7648 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7649 sv_usepvn(sv, (char*)tmps, tend - tmps);
7655 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7657 I32 count = FILTER_READ(idx+1, sv, maxlen);
7662 if (!*SvPV_nolen(sv))
7663 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7666 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7667 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7668 sv_usepvn(sv, (char*)tmps, tend - tmps);