3 * Copyright (c) 1991-1999, 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);
32 #define XFAKEBRACK 128
35 #define UTF (PL_hints & HINT_UTF8)
37 * Note: we try to be careful never to call the isXXX_utf8() functions
38 * unless we're pretty sure we've seen the beginning of a UTF-8 character
39 * (that is, the two high bits are set). Otherwise we risk loading in the
40 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
42 #define isIDFIRST_lazy(p) ((!UTF || (*((U8*)p) < 0xc0)) \
44 : isIDFIRST_utf8((U8*)p))
45 #define isALNUM_lazy(p) ((!UTF || (*((U8*)p) < 0xc0)) \
47 : isALNUM_utf8((U8*)p))
49 /* In variables name $^X, these are the legal values for X.
50 * 1999-02-27 mjd-perl-patch@plover.com */
51 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
53 /* 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
79 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
81 # include <unistd.h> /* Needed for execv() */
90 YYSTYPE* yylval_pointer = NULL;
91 int* yychar_pointer = NULL;
94 # define yylval (*yylval_pointer)
95 # define yychar (*yychar_pointer)
96 # define PERL_YYLEX_PARAM yylval_pointer,yychar_pointer
98 # define yylex() Perl_yylex(aTHX_ yylval_pointer, yychar_pointer)
101 #include "keywords.h"
103 /* CLINE is a macro that ensures PL_copline has a sane value */
108 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
111 * Convenience functions to return different tokens and prime the
112 * lexer for the next token. They all take an argument.
114 * TOKEN : generic token (used for '(', DOLSHARP, etc)
115 * OPERATOR : generic operator
116 * AOPERATOR : assignment operator
117 * PREBLOCK : beginning the block after an if, while, foreach, ...
118 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
119 * PREREF : *EXPR where EXPR is not a simple identifier
120 * TERM : expression term
121 * LOOPX : loop exiting command (goto, last, dump, etc)
122 * FTST : file test operator
123 * FUN0 : zero-argument function
124 * FUN1 : not used, except for not, which isn't a UNIOP
125 * BOop : bitwise or or xor
127 * SHop : shift operator
128 * PWop : power operator
129 * PMop : pattern-matching operator
130 * Aop : addition-level operator
131 * Mop : multiplication-level operator
132 * Eop : equality-testing operator
133 * Rop : relational operator <= != gt
135 * Also see LOP and lop() below.
138 #define TOKEN(retval) return (PL_bufptr = s,(int)retval)
139 #define OPERATOR(retval) return (PL_expect = XTERM,PL_bufptr = s,(int)retval)
140 #define AOPERATOR(retval) return ao((PL_expect = XTERM,PL_bufptr = s,(int)retval))
141 #define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
142 #define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
143 #define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s,(int)retval)
144 #define TERM(retval) return (CLINE, PL_expect = XOPERATOR,PL_bufptr = s,(int)retval)
145 #define LOOPX(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
146 #define FTST(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
147 #define FUN0(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
148 #define FUN1(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
149 #define BOop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
150 #define BAop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
151 #define SHop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
152 #define PWop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
153 #define PMop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
154 #define Aop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
155 #define Mop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
156 #define Eop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
157 #define Rop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
159 /* This bit of chicanery makes a unary function followed by
160 * a parenthesis into a function with one argument, highest precedence.
162 #define UNI(f) return(yylval.ival = f, \
165 PL_last_uni = PL_oldbufptr, \
166 PL_last_lop_op = f, \
167 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
169 #define UNIBRACK(f) return(yylval.ival = f, \
171 PL_last_uni = PL_oldbufptr, \
172 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
174 /* grandfather return to old style */
175 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
180 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
181 * into an OP_ANDASSIGN or OP_ORASSIGN
185 S_ao(pTHX_ int toketype)
187 if (*PL_bufptr == '=') {
189 if (toketype == ANDAND)
190 yylval.ival = OP_ANDASSIGN;
191 else if (toketype == OROR)
192 yylval.ival = OP_ORASSIGN;
200 * When Perl expects an operator and finds something else, no_op
201 * prints the warning. It always prints "<something> found where
202 * operator expected. It prints "Missing semicolon on previous line?"
203 * if the surprise occurs at the start of the line. "do you need to
204 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
205 * where the compiler doesn't know if foo is a method call or a function.
206 * It prints "Missing operator before end of line" if there's nothing
207 * after the missing operator, or "... before <...>" if there is something
208 * after the missing operator.
212 S_no_op(pTHX_ char *what, char *s)
214 char *oldbp = PL_bufptr;
215 bool is_first = (PL_oldbufptr == PL_linestart);
223 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
225 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
226 else if (PL_oldoldbufptr && isIDFIRST_lazy(PL_oldoldbufptr)) {
228 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy(t) || *t == ':'); t++) ;
229 if (t < PL_bufptr && isSPACE(*t))
230 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
231 t - PL_oldoldbufptr, PL_oldoldbufptr);
234 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
240 * Complain about missing quote/regexp/heredoc terminator.
241 * If it's called with (char *)NULL then it cauterizes the line buffer.
242 * If we're in a delimited string and the delimiter is a control
243 * character, it's reformatted into a two-char sequence like ^C.
248 S_missingterm(pTHX_ char *s)
253 char *nl = strrchr(s,'\n');
259 iscntrl(PL_multi_close)
261 PL_multi_close < 32 || PL_multi_close == 127
265 tmpbuf[1] = toCTRL(PL_multi_close);
271 *tmpbuf = PL_multi_close;
275 q = strchr(s,'"') ? '\'' : '"';
276 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
284 Perl_deprecate(pTHX_ char *s)
287 if (ckWARN(WARN_DEPRECATED))
288 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
293 * Deprecate a comma-less variable list.
299 deprecate("comma-less variable list");
303 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
304 * utf16-to-utf8-reversed.
310 S_win32_textfilter(pTHX_ int idx, SV *sv, int maxlen)
312 I32 count = FILTER_READ(idx+1, sv, maxlen);
313 if (count > 0 && !maxlen)
314 win32_strip_return(sv);
320 S_utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen)
322 I32 count = FILTER_READ(idx+1, sv, maxlen);
326 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
327 tend = utf16_to_utf8((U16*)SvPVX(sv), tmps, SvCUR(sv));
328 sv_usepvn(sv, (char*)tmps, tend - tmps);
335 S_utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen)
337 I32 count = FILTER_READ(idx+1, sv, maxlen);
341 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
342 tend = utf16_to_utf8_reversed((U16*)SvPVX(sv), tmps, SvCUR(sv));
343 sv_usepvn(sv, (char*)tmps, tend - tmps);
351 * Initialize variables. Uses the Perl save_stack to save its state (for
352 * recursive calls to the parser).
356 Perl_lex_start(pTHX_ SV *line)
362 SAVEI32(PL_lex_dojoin);
363 SAVEI32(PL_lex_brackets);
364 SAVEI32(PL_lex_casemods);
365 SAVEI32(PL_lex_starts);
366 SAVEI32(PL_lex_state);
367 SAVEVPTR(PL_lex_inpat);
368 SAVEI32(PL_lex_inwhat);
369 SAVECOPLINE(PL_curcop);
372 SAVEPPTR(PL_oldbufptr);
373 SAVEPPTR(PL_oldoldbufptr);
374 SAVEPPTR(PL_linestart);
375 SAVESPTR(PL_linestr);
376 SAVEPPTR(PL_lex_brackstack);
377 SAVEPPTR(PL_lex_casestack);
378 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
379 SAVESPTR(PL_lex_stuff);
380 SAVEI32(PL_lex_defer);
381 SAVEI32(PL_sublex_info.sub_inwhat);
382 SAVESPTR(PL_lex_repl);
384 SAVEINT(PL_lex_expect);
386 PL_lex_state = LEX_NORMAL;
390 New(899, PL_lex_brackstack, 120, char);
391 New(899, PL_lex_casestack, 12, char);
392 SAVEFREEPV(PL_lex_brackstack);
393 SAVEFREEPV(PL_lex_casestack);
395 *PL_lex_casestack = '\0';
398 PL_lex_stuff = Nullsv;
399 PL_lex_repl = Nullsv;
402 PL_sublex_info.sub_inwhat = 0;
404 if (SvREADONLY(PL_linestr))
405 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
406 s = SvPV(PL_linestr, len);
407 if (len && s[len-1] != ';') {
408 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
409 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
410 sv_catpvn(PL_linestr, "\n;", 2);
412 SvTEMP_off(PL_linestr);
413 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
414 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
416 PL_rs = newSVpvn("\n", 1);
422 * Finalizer for lexing operations. Must be called when the parser is
423 * done with the lexer.
429 PL_doextract = FALSE;
434 * This subroutine has nothing to do with tilting, whether at windmills
435 * or pinball tables. Its name is short for "increment line". It
436 * increments the current line number in CopLINE(PL_curcop) and checks
437 * to see whether the line starts with a comment of the form
438 * # line 500 "foo.pm"
439 * If so, it sets the current line number and file to the values in the comment.
443 S_incline(pTHX_ char *s)
451 CopLINE_inc(PL_curcop);
454 while (*s == ' ' || *s == '\t') s++;
455 if (strnEQ(s, "line ", 5)) {
464 while (*s == ' ' || *s == '\t')
466 if (*s == '"' && (t = strchr(s+1, '"')))
470 return; /* false alarm */
471 for (t = s; !isSPACE(*t); t++) ;
476 CopFILE_set(PL_curcop, s);
478 CopFILE_set(PL_curcop, PL_origfilename);
480 CopLINE_set(PL_curcop, atoi(n)-1);
485 * Called to gobble the appropriate amount and type of whitespace.
486 * Skips comments as well.
490 S_skipspace(pTHX_ register char *s)
493 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
494 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
500 SSize_t oldprevlen, oldoldprevlen;
501 SSize_t oldloplen, oldunilen;
502 while (s < PL_bufend && isSPACE(*s)) {
503 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
508 if (s < PL_bufend && *s == '#') {
509 while (s < PL_bufend && *s != '\n')
513 if (PL_in_eval && !PL_rsfp) {
520 /* only continue to recharge the buffer if we're at the end
521 * of the buffer, we're not reading from a source filter, and
522 * we're in normal lexing mode
524 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
525 PL_lex_state == LEX_FORMLINE)
528 /* try to recharge the buffer */
529 if ((s = filter_gets(PL_linestr, PL_rsfp,
530 (prevlen = SvCUR(PL_linestr)))) == Nullch)
532 /* end of file. Add on the -p or -n magic */
533 if (PL_minus_n || PL_minus_p) {
534 sv_setpv(PL_linestr,PL_minus_p ?
535 ";}continue{print or die qq(-p destination: $!\\n)" :
537 sv_catpv(PL_linestr,";}");
538 PL_minus_n = PL_minus_p = 0;
541 sv_setpv(PL_linestr,";");
543 /* reset variables for next time we lex */
544 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
546 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
548 /* Close the filehandle. Could be from -P preprocessor,
549 * STDIN, or a regular file. If we were reading code from
550 * STDIN (because the commandline held no -e or filename)
551 * then we don't close it, we reset it so the code can
552 * read from STDIN too.
555 if (PL_preprocess && !PL_in_eval)
556 (void)PerlProc_pclose(PL_rsfp);
557 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
558 PerlIO_clearerr(PL_rsfp);
560 (void)PerlIO_close(PL_rsfp);
565 /* not at end of file, so we only read another line */
566 /* make corresponding updates to old pointers, for yyerror() */
567 oldprevlen = PL_oldbufptr - PL_bufend;
568 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
570 oldunilen = PL_last_uni - PL_bufend;
572 oldloplen = PL_last_lop - PL_bufend;
573 PL_linestart = PL_bufptr = s + prevlen;
574 PL_bufend = s + SvCUR(PL_linestr);
576 PL_oldbufptr = s + oldprevlen;
577 PL_oldoldbufptr = s + oldoldprevlen;
579 PL_last_uni = s + oldunilen;
581 PL_last_lop = s + oldloplen;
584 /* debugger active and we're not compiling the debugger code,
585 * so store the line into the debugger's array of lines
587 if (PERLDB_LINE && PL_curstash != PL_debstash) {
588 SV *sv = NEWSV(85,0);
590 sv_upgrade(sv, SVt_PVMG);
591 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
592 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
599 * Check the unary operators to ensure there's no ambiguity in how they're
600 * used. An ambiguous piece of code would be:
602 * This doesn't mean rand() + 5. Because rand() is a unary operator,
603 * the +5 is its argument.
613 if (PL_oldoldbufptr != PL_last_uni)
615 while (isSPACE(*PL_last_uni))
617 for (s = PL_last_uni; isALNUM_lazy(s) || *s == '-'; s++) ;
618 if ((t = strchr(s, '(')) && t < PL_bufptr)
620 if (ckWARN_d(WARN_AMBIGUOUS)){
623 Perl_warner(aTHX_ WARN_AMBIGUOUS,
624 "Warning: Use of \"%s\" without parens is ambiguous",
630 /* workaround to replace the UNI() macro with a function. Only the
631 * hints/uts.sh file mentions this. Other comments elsewhere in the
632 * source indicate Microport Unix might need it too.
638 #define UNI(f) return uni(f,s)
641 S_uni(pTHX_ I32 f, char *s)
646 PL_last_uni = PL_oldbufptr;
657 #endif /* CRIPPLED_CC */
660 * LOP : macro to build a list operator. Its behaviour has been replaced
661 * with a subroutine, S_lop() for which LOP is just another name.
664 #define LOP(f,x) return lop(f,x,s)
668 * Build a list operator (or something that might be one). The rules:
669 * - if we have a next token, then it's a list operator [why?]
670 * - if the next thing is an opening paren, then it's a function
671 * - else it's a list operator
675 S_lop(pTHX_ I32 f, int x, char *s)
682 PL_last_lop = PL_oldbufptr;
697 * When the lexer realizes it knows the next token (for instance,
698 * it is reordering tokens for the parser) then it can call S_force_next
699 * to know what token to return the next time the lexer is called. Caller
700 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
701 * handles the token correctly.
705 S_force_next(pTHX_ I32 type)
707 PL_nexttype[PL_nexttoke] = type;
709 if (PL_lex_state != LEX_KNOWNEXT) {
710 PL_lex_defer = PL_lex_state;
711 PL_lex_expect = PL_expect;
712 PL_lex_state = LEX_KNOWNEXT;
718 * When the lexer knows the next thing is a word (for instance, it has
719 * just seen -> and it knows that the next char is a word char, then
720 * it calls S_force_word to stick the next word into the PL_next lookahead.
723 * char *start : buffer position (must be within PL_linestr)
724 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
725 * int check_keyword : if true, Perl checks to make sure the word isn't
726 * a keyword (do this if the word is a label, e.g. goto FOO)
727 * int allow_pack : if true, : characters will also be allowed (require,
729 * int allow_initial_tick : used by the "sub" lexer only.
733 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
738 start = skipspace(start);
740 if (isIDFIRST_lazy(s) ||
741 (allow_pack && *s == ':') ||
742 (allow_initial_tick && *s == '\'') )
744 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
745 if (check_keyword && keyword(PL_tokenbuf, len))
747 if (token == METHOD) {
752 PL_expect = XOPERATOR;
755 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
756 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
764 * Called when the lexer wants $foo *foo &foo etc, but the program
765 * text only contains the "foo" portion. The first argument is a pointer
766 * to the "foo", and the second argument is the type symbol to prefix.
767 * Forces the next token to be a "WORD".
768 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
772 S_force_ident(pTHX_ register char *s, int kind)
775 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
776 PL_nextval[PL_nexttoke].opval = o;
779 dTHR; /* just for in_eval */
780 o->op_private = OPpCONST_ENTERED;
781 /* XXX see note in pp_entereval() for why we forgo typo
782 warnings if the symbol must be introduced in an eval.
784 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
785 kind == '$' ? SVt_PV :
786 kind == '@' ? SVt_PVAV :
787 kind == '%' ? SVt_PVHV :
796 * Forces the next token to be a version number.
800 S_force_version(pTHX_ char *s)
802 OP *version = Nullop;
806 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
810 for (; isDIGIT(*d) || *d == '_' || *d == '.'; d++);
811 if ((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
813 /* real VERSION number -- GBARR */
814 version = yylval.opval;
818 /* NOTE: The parser sees the package name and the VERSION swapped */
819 PL_nextval[PL_nexttoke].opval = version;
827 * Tokenize a quoted string passed in as an SV. It finds the next
828 * chunk, up to end of string or a backslash. It may make a new
829 * SV containing that chunk (if HINT_NEW_STRING is on). It also
834 S_tokeq(pTHX_ SV *sv)
845 s = SvPV_force(sv, len);
849 while (s < send && *s != '\\')
854 if ( PL_hints & HINT_NEW_STRING )
855 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
858 if (s + 1 < send && (s[1] == '\\'))
859 s++; /* all that, just for this */
864 SvCUR_set(sv, d - SvPVX(sv));
866 if ( PL_hints & HINT_NEW_STRING )
867 return new_constant(NULL, 0, "q", sv, pv, "q");
872 * Now come three functions related to double-quote context,
873 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
874 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
875 * interact with PL_lex_state, and create fake ( ... ) argument lists
876 * to handle functions and concatenation.
877 * They assume that whoever calls them will be setting up a fake
878 * join call, because each subthing puts a ',' after it. This lets
881 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
883 * (I'm not sure whether the spurious commas at the end of lcfirst's
884 * arguments and join's arguments are created or not).
889 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
891 * Pattern matching will set PL_lex_op to the pattern-matching op to
892 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
894 * OP_CONST and OP_READLINE are easy--just make the new op and return.
896 * Everything else becomes a FUNC.
898 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
899 * had an OP_CONST or OP_READLINE). This just sets us up for a
900 * call to S_sublex_push().
906 register I32 op_type = yylval.ival;
908 if (op_type == OP_NULL) {
909 yylval.opval = PL_lex_op;
913 if (op_type == OP_CONST || op_type == OP_READLINE) {
914 SV *sv = tokeq(PL_lex_stuff);
916 if (SvTYPE(sv) == SVt_PVIV) {
917 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
923 nsv = newSVpvn(p, len);
927 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
928 PL_lex_stuff = Nullsv;
932 PL_sublex_info.super_state = PL_lex_state;
933 PL_sublex_info.sub_inwhat = op_type;
934 PL_sublex_info.sub_op = PL_lex_op;
935 PL_lex_state = LEX_INTERPPUSH;
939 yylval.opval = PL_lex_op;
949 * Create a new scope to save the lexing state. The scope will be
950 * ended in S_sublex_done. Returns a '(', starting the function arguments
951 * to the uc, lc, etc. found before.
952 * Sets PL_lex_state to LEX_INTERPCONCAT.
961 PL_lex_state = PL_sublex_info.super_state;
962 SAVEI32(PL_lex_dojoin);
963 SAVEI32(PL_lex_brackets);
964 SAVEI32(PL_lex_casemods);
965 SAVEI32(PL_lex_starts);
966 SAVEI32(PL_lex_state);
967 SAVEVPTR(PL_lex_inpat);
968 SAVEI32(PL_lex_inwhat);
969 SAVECOPLINE(PL_curcop);
971 SAVEPPTR(PL_oldbufptr);
972 SAVEPPTR(PL_oldoldbufptr);
973 SAVEPPTR(PL_linestart);
974 SAVESPTR(PL_linestr);
975 SAVEPPTR(PL_lex_brackstack);
976 SAVEPPTR(PL_lex_casestack);
978 PL_linestr = PL_lex_stuff;
979 PL_lex_stuff = Nullsv;
981 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
983 PL_bufend += SvCUR(PL_linestr);
984 SAVEFREESV(PL_linestr);
986 PL_lex_dojoin = FALSE;
988 New(899, PL_lex_brackstack, 120, char);
989 New(899, PL_lex_casestack, 12, char);
990 SAVEFREEPV(PL_lex_brackstack);
991 SAVEFREEPV(PL_lex_casestack);
993 *PL_lex_casestack = '\0';
995 PL_lex_state = LEX_INTERPCONCAT;
996 CopLINE_set(PL_curcop, PL_multi_start);
998 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
999 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1000 PL_lex_inpat = PL_sublex_info.sub_op;
1002 PL_lex_inpat = Nullop;
1009 * Restores lexer state after a S_sublex_push.
1015 if (!PL_lex_starts++) {
1016 PL_expect = XOPERATOR;
1017 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpvn("",0));
1021 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1022 PL_lex_state = LEX_INTERPCASEMOD;
1026 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1027 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1028 PL_linestr = PL_lex_repl;
1030 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1031 PL_bufend += SvCUR(PL_linestr);
1032 SAVEFREESV(PL_linestr);
1033 PL_lex_dojoin = FALSE;
1034 PL_lex_brackets = 0;
1035 PL_lex_casemods = 0;
1036 *PL_lex_casestack = '\0';
1038 if (SvEVALED(PL_lex_repl)) {
1039 PL_lex_state = LEX_INTERPNORMAL;
1041 /* we don't clear PL_lex_repl here, so that we can check later
1042 whether this is an evalled subst; that means we rely on the
1043 logic to ensure sublex_done() is called again only via the
1044 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1047 PL_lex_state = LEX_INTERPCONCAT;
1048 PL_lex_repl = Nullsv;
1054 PL_bufend = SvPVX(PL_linestr);
1055 PL_bufend += SvCUR(PL_linestr);
1056 PL_expect = XOPERATOR;
1057 PL_sublex_info.sub_inwhat = 0;
1065 Extracts a pattern, double-quoted string, or transliteration. This
1068 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1069 processing a pattern (PL_lex_inpat is true), a transliteration
1070 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1072 Returns a pointer to the character scanned up to. Iff this is
1073 advanced from the start pointer supplied (ie if anything was
1074 successfully parsed), will leave an OP for the substring scanned
1075 in yylval. Caller must intuit reason for not parsing further
1076 by looking at the next characters herself.
1080 double-quoted style: \r and \n
1081 regexp special ones: \D \s
1083 backrefs: \1 (deprecated in substitution replacements)
1084 case and quoting: \U \Q \E
1085 stops on @ and $, but not for $ as tail anchor
1087 In transliterations:
1088 characters are VERY literal, except for - not at the start or end
1089 of the string, which indicates a range. scan_const expands the
1090 range to the full set of intermediate characters.
1092 In double-quoted strings:
1094 double-quoted style: \r and \n
1096 backrefs: \1 (deprecated)
1097 case and quoting: \U \Q \E
1100 scan_const does *not* construct ops to handle interpolated strings.
1101 It stops processing as soon as it finds an embedded $ or @ variable
1102 and leaves it to the caller to work out what's going on.
1104 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1106 $ in pattern could be $foo or could be tail anchor. Assumption:
1107 it's a tail anchor if $ is the last thing in the string, or if it's
1108 followed by one of ")| \n\t"
1110 \1 (backreferences) are turned into $1
1112 The structure of the code is
1113 while (there's a character to process) {
1114 handle transliteration ranges
1115 skip regexp comments
1116 skip # initiated comments in //x patterns
1117 check for embedded @foo
1118 check for embedded scalars
1120 leave intact backslashes from leave (below)
1121 deprecate \1 in strings and sub replacements
1122 handle string-changing backslashes \l \U \Q \E, etc.
1123 switch (what was escaped) {
1124 handle - in a transliteration (becomes a literal -)
1125 handle \132 octal characters
1126 handle 0x15 hex characters
1127 handle \cV (control V)
1128 handle printf backslashes (\f, \r, \n, etc)
1130 } (end if backslash)
1131 } (end while character to read)
1136 S_scan_const(pTHX_ char *start)
1138 register char *send = PL_bufend; /* end of the constant */
1139 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1140 register char *s = start; /* start of the constant */
1141 register char *d = SvPVX(sv); /* destination for copies */
1142 bool dorange = FALSE; /* are we in a translit range? */
1144 I32 utf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1145 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1147 I32 thisutf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1148 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ?
1149 OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
1151 const char *leaveit = /* set of acceptably-backslashed characters */
1153 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1156 while (s < send || dorange) {
1157 /* get transliterations out of the way (they're most literal) */
1158 if (PL_lex_inwhat == OP_TRANS) {
1159 /* expand a range A-Z to the full set of characters. AIE! */
1161 I32 i; /* current expanded character */
1162 I32 min; /* first character in range */
1163 I32 max; /* last character in range */
1165 i = d - SvPVX(sv); /* remember current offset */
1166 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1167 d = SvPVX(sv) + i; /* refresh d after realloc */
1168 d -= 2; /* eat the first char and the - */
1170 min = (U8)*d; /* first char in range */
1171 max = (U8)d[1]; /* last char in range */
1174 if ((isLOWER(min) && isLOWER(max)) ||
1175 (isUPPER(min) && isUPPER(max))) {
1177 for (i = min; i <= max; i++)
1181 for (i = min; i <= max; i++)
1188 for (i = min; i <= max; i++)
1191 /* mark the range as done, and continue */
1196 /* range begins (ignore - as first or last char) */
1197 else if (*s == '-' && s+1 < send && s != start) {
1199 *d++ = (char)0xff; /* use illegal utf8 byte--see pmtrans */
1208 /* if we get here, we're not doing a transliteration */
1210 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1211 except for the last char, which will be done separately. */
1212 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1214 while (s < send && *s != ')')
1216 } else if (s[2] == '{'
1217 || s[2] == 'p' && s[3] == '{') { /* This should march regcomp.c */
1219 char *regparse = s + (s[2] == '{' ? 3 : 4);
1222 while (count && (c = *regparse)) {
1223 if (c == '\\' && regparse[1])
1231 if (*regparse != ')') {
1232 regparse--; /* Leave one char for continuation. */
1233 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1235 while (s < regparse)
1240 /* likewise skip #-initiated comments in //x patterns */
1241 else if (*s == '#' && PL_lex_inpat &&
1242 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1243 while (s+1 < send && *s != '\n')
1247 /* check for embedded arrays (@foo, @:foo, @'foo, @{foo}, @$foo) */
1248 else if (*s == '@' && s[1] && (isALNUM_lazy(s+1) || strchr(":'{$", s[1])))
1251 /* check for embedded scalars. only stop if we're sure it's a
1254 else if (*s == '$') {
1255 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1257 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1258 break; /* in regexp, $ might be tail anchor */
1261 /* (now in tr/// code again) */
1263 if (*s & 0x80 && thisutf) {
1264 dTHR; /* only for ckWARN */
1265 if (ckWARN(WARN_UTF8)) {
1266 (void)utf8_to_uv((U8*)s, &len); /* could cvt latin-1 to utf8 here... */
1276 if (*s == '\\' && s+1 < send) {
1279 /* some backslashes we leave behind */
1280 if (*leaveit && *s && strchr(leaveit, *s)) {
1286 /* deprecate \1 in strings and substitution replacements */
1287 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1288 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1290 dTHR; /* only for ckWARN */
1291 if (ckWARN(WARN_SYNTAX))
1292 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1297 /* string-change backslash escapes */
1298 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1303 /* if we get here, it's either a quoted -, or a digit */
1306 /* quoted - in transliterations */
1308 if (PL_lex_inwhat == OP_TRANS) {
1316 if (ckWARN(WARN_UNSAFE) && isALPHA(*s))
1317 Perl_warner(aTHX_ WARN_UNSAFE,
1318 "Unrecognized escape \\%c passed through",
1320 /* default action is to copy the quoted character */
1325 /* \132 indicates an octal constant */
1326 case '0': case '1': case '2': case '3':
1327 case '4': case '5': case '6': case '7':
1328 *d++ = (char)scan_oct(s, 3, &len);
1332 /* \x24 indicates a hex constant */
1336 char* e = strchr(s, '}');
1339 yyerror("Missing right brace on \\x{}");
1344 if (ckWARN(WARN_UTF8))
1345 Perl_warner(aTHX_ WARN_UTF8,
1346 "Use of \\x{} without utf8 declaration");
1348 /* note: utf always shorter than hex */
1349 d = (char*)uv_to_utf8((U8*)d,
1350 (UV)scan_hex(s + 1, e - s - 1, &len));
1354 UV uv = (UV)scan_hex(s, 2, &len);
1355 if (utf && PL_lex_inwhat == OP_TRANS &&
1356 utf != (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1358 d = (char*)uv_to_utf8((U8*)d, uv); /* doing a CU or UC */
1361 if (uv >= 127 && UTF) {
1363 if (ckWARN(WARN_UTF8))
1364 Perl_warner(aTHX_ WARN_UTF8,
1365 "\\x%.*s will produce malformed UTF-8 character; use \\x{%.*s} for that",
1374 /* \N{latin small letter a} is a named character */
1378 char* e = strchr(s, '}');
1387 yyerror("Missing right brace on \\N{}");
1391 res = newSVpvn(s + 1, e - s - 1);
1392 res = new_constant( Nullch, 0, "charnames",
1393 res, Nullsv, "\\N{...}" );
1394 str = SvPV(res,len);
1395 if (len > e - s + 4) {
1396 char *odest = SvPVX(sv);
1398 SvGROW(sv, (SvCUR(sv) + len - (e - s + 4)));
1399 d = SvPVX(sv) + (d - odest);
1401 Copy(str, d, len, char);
1408 yyerror("Missing braces on \\N{}");
1411 /* \c is a control character */
1425 /* printf-style backslashes, formfeeds, newlines, etc */
1443 *d++ = '\047'; /* CP 1047 */
1446 *d++ = '\057'; /* CP 1047 */
1460 } /* end if (backslash) */
1463 } /* while loop to process each character */
1465 /* terminate the string and set up the sv */
1467 SvCUR_set(sv, d - SvPVX(sv));
1470 /* shrink the sv if we allocated more than we used */
1471 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1472 SvLEN_set(sv, SvCUR(sv) + 1);
1473 Renew(SvPVX(sv), SvLEN(sv), char);
1476 /* return the substring (via yylval) only if we parsed anything */
1477 if (s > PL_bufptr) {
1478 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1479 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1481 ( PL_lex_inwhat == OP_TRANS
1483 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1486 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1493 * Returns TRUE if there's more to the expression (e.g., a subscript),
1496 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1498 * ->[ and ->{ return TRUE
1499 * { and [ outside a pattern are always subscripts, so return TRUE
1500 * if we're outside a pattern and it's not { or [, then return FALSE
1501 * if we're in a pattern and the first char is a {
1502 * {4,5} (any digits around the comma) returns FALSE
1503 * if we're in a pattern and the first char is a [
1505 * [SOMETHING] has a funky algorithm to decide whether it's a
1506 * character class or not. It has to deal with things like
1507 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1508 * anything else returns TRUE
1511 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1514 S_intuit_more(pTHX_ register char *s)
1516 if (PL_lex_brackets)
1518 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1520 if (*s != '{' && *s != '[')
1525 /* In a pattern, so maybe we have {n,m}. */
1542 /* On the other hand, maybe we have a character class */
1545 if (*s == ']' || *s == '^')
1548 /* this is terrifying, and it works */
1549 int weight = 2; /* let's weigh the evidence */
1551 unsigned char un_char = 255, last_un_char;
1552 char *send = strchr(s,']');
1553 char tmpbuf[sizeof PL_tokenbuf * 4];
1555 if (!send) /* has to be an expression */
1558 Zero(seen,256,char);
1561 else if (isDIGIT(*s)) {
1563 if (isDIGIT(s[1]) && s[2] == ']')
1569 for (; s < send; s++) {
1570 last_un_char = un_char;
1571 un_char = (unsigned char)*s;
1576 weight -= seen[un_char] * 10;
1577 if (isALNUM_lazy(s+1)) {
1578 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1579 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1584 else if (*s == '$' && s[1] &&
1585 strchr("[#!%*<>()-=",s[1])) {
1586 if (/*{*/ strchr("])} =",s[2]))
1595 if (strchr("wds]",s[1]))
1597 else if (seen['\''] || seen['"'])
1599 else if (strchr("rnftbxcav",s[1]))
1601 else if (isDIGIT(s[1])) {
1603 while (s[1] && isDIGIT(s[1]))
1613 if (strchr("aA01! ",last_un_char))
1615 if (strchr("zZ79~",s[1]))
1617 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1618 weight -= 5; /* cope with negative subscript */
1621 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1622 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1627 if (keyword(tmpbuf, d - tmpbuf))
1630 if (un_char == last_un_char + 1)
1632 weight -= seen[un_char];
1637 if (weight >= 0) /* probably a character class */
1647 * Does all the checking to disambiguate
1649 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1650 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1652 * First argument is the stuff after the first token, e.g. "bar".
1654 * Not a method if bar is a filehandle.
1655 * Not a method if foo is a subroutine prototyped to take a filehandle.
1656 * Not a method if it's really "Foo $bar"
1657 * Method if it's "foo $bar"
1658 * Not a method if it's really "print foo $bar"
1659 * Method if it's really "foo package::" (interpreted as package->foo)
1660 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1661 * Not a method if bar is a filehandle or package, but is quotd with
1666 S_intuit_method(pTHX_ char *start, GV *gv)
1668 char *s = start + (*start == '$');
1669 char tmpbuf[sizeof PL_tokenbuf];
1677 if ((cv = GvCVu(gv))) {
1678 char *proto = SvPVX(cv);
1688 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1689 /* start is the beginning of the possible filehandle/object,
1690 * and s is the end of it
1691 * tmpbuf is a copy of it
1694 if (*start == '$') {
1695 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1700 return *s == '(' ? FUNCMETH : METHOD;
1702 if (!keyword(tmpbuf, len)) {
1703 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1708 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1709 if (indirgv && GvCVu(indirgv))
1711 /* filehandle or package name makes it a method */
1712 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1714 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1715 return 0; /* no assumptions -- "=>" quotes bearword */
1717 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1718 newSVpvn(tmpbuf,len));
1719 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1723 return *s == '(' ? FUNCMETH : METHOD;
1731 * Return a string of Perl code to load the debugger. If PERL5DB
1732 * is set, it will return the contents of that, otherwise a
1733 * compile-time require of perl5db.pl.
1740 char *pdb = PerlEnv_getenv("PERL5DB");
1744 SETERRNO(0,SS$_NORMAL);
1745 return "BEGIN { require 'perl5db.pl' }";
1751 /* Encoded script support. filter_add() effectively inserts a
1752 * 'pre-processing' function into the current source input stream.
1753 * Note that the filter function only applies to the current source file
1754 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1756 * The datasv parameter (which may be NULL) can be used to pass
1757 * private data to this instance of the filter. The filter function
1758 * can recover the SV using the FILTER_DATA macro and use it to
1759 * store private buffers and state information.
1761 * The supplied datasv parameter is upgraded to a PVIO type
1762 * and the IoDIRP field is used to store the function pointer,
1763 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1764 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1765 * private use must be set using malloc'd pointers.
1769 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1774 if (!PL_rsfp_filters)
1775 PL_rsfp_filters = newAV();
1777 datasv = NEWSV(255,0);
1778 if (!SvUPGRADE(datasv, SVt_PVIO))
1779 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1780 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1781 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1782 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1783 funcp, SvPV_nolen(datasv)));
1784 av_unshift(PL_rsfp_filters, 1);
1785 av_store(PL_rsfp_filters, 0, datasv) ;
1790 /* Delete most recently added instance of this filter function. */
1792 Perl_filter_del(pTHX_ filter_t funcp)
1795 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1796 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1798 /* if filter is on top of stack (usual case) just pop it off */
1799 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1800 if (IoDIRP(datasv) == (DIR*)funcp) {
1801 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1802 IoDIRP(datasv) = (DIR*)NULL;
1803 sv_free(av_pop(PL_rsfp_filters));
1807 /* we need to search for the correct entry and clear it */
1808 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1812 /* Invoke the n'th filter function for the current rsfp. */
1814 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1817 /* 0 = read one text line */
1822 if (!PL_rsfp_filters)
1824 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1825 /* Provide a default input filter to make life easy. */
1826 /* Note that we append to the line. This is handy. */
1827 DEBUG_P(PerlIO_printf(Perl_debug_log,
1828 "filter_read %d: from rsfp\n", idx));
1832 int old_len = SvCUR(buf_sv) ;
1834 /* ensure buf_sv is large enough */
1835 SvGROW(buf_sv, old_len + maxlen) ;
1836 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1837 if (PerlIO_error(PL_rsfp))
1838 return -1; /* error */
1840 return 0 ; /* end of file */
1842 SvCUR_set(buf_sv, old_len + len) ;
1845 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
1846 if (PerlIO_error(PL_rsfp))
1847 return -1; /* error */
1849 return 0 ; /* end of file */
1852 return SvCUR(buf_sv);
1854 /* Skip this filter slot if filter has been deleted */
1855 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
1856 DEBUG_P(PerlIO_printf(Perl_debug_log,
1857 "filter_read %d: skipped (filter deleted)\n",
1859 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1861 /* Get function pointer hidden within datasv */
1862 funcp = (filter_t)IoDIRP(datasv);
1863 DEBUG_P(PerlIO_printf(Perl_debug_log,
1864 "filter_read %d: via function %p (%s)\n",
1865 idx, funcp, SvPV_nolen(datasv)));
1866 /* Call function. The function is expected to */
1867 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1868 /* Return: <0:error, =0:eof, >0:not eof */
1869 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
1873 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
1876 if (!PL_rsfp_filters) {
1877 filter_add(win32_textfilter,NULL);
1880 if (PL_rsfp_filters) {
1883 SvCUR_set(sv, 0); /* start with empty line */
1884 if (FILTER_READ(0, sv, 0) > 0)
1885 return ( SvPVX(sv) ) ;
1890 return (sv_gets(sv, fp, append));
1895 static char* exp_name[] =
1896 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
1897 "ATTRTERM", "TERMBLOCK"
1904 Works out what to call the token just pulled out of the input
1905 stream. The yacc parser takes care of taking the ops we return and
1906 stitching them into a tree.
1912 if read an identifier
1913 if we're in a my declaration
1914 croak if they tried to say my($foo::bar)
1915 build the ops for a my() declaration
1916 if it's an access to a my() variable
1917 are we in a sort block?
1918 croak if my($a); $a <=> $b
1919 build ops for access to a my() variable
1920 if in a dq string, and they've said @foo and we can't find @foo
1922 build ops for a bareword
1923 if we already built the token before, use it.
1927 #ifdef USE_PURE_BISON
1928 Perl_yylex(pTHX_ YYSTYPE *lvalp, int *lcharp)
1941 #ifdef USE_PURE_BISON
1942 yylval_pointer = lvalp;
1943 yychar_pointer = lcharp;
1946 /* check if there's an identifier for us to look at */
1947 if (PL_pending_ident) {
1948 /* pit holds the identifier we read and pending_ident is reset */
1949 char pit = PL_pending_ident;
1950 PL_pending_ident = 0;
1952 /* if we're in a my(), we can't allow dynamics here.
1953 $foo'bar has already been turned into $foo::bar, so
1954 just check for colons.
1956 if it's a legal name, the OP is a PADANY.
1959 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
1960 tmp = pad_allocmy(PL_tokenbuf);
1963 if (strchr(PL_tokenbuf,':'))
1964 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
1966 yylval.opval = newOP(OP_PADANY, 0);
1967 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
1973 build the ops for accesses to a my() variable.
1975 Deny my($a) or my($b) in a sort block, *if* $a or $b is
1976 then used in a comparison. This catches most, but not
1977 all cases. For instance, it catches
1978 sort { my($a); $a <=> $b }
1980 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
1981 (although why you'd do that is anyone's guess).
1984 if (!strchr(PL_tokenbuf,':')) {
1986 /* Check for single character per-thread SVs */
1987 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
1988 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
1989 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
1991 yylval.opval = newOP(OP_THREADSV, 0);
1992 yylval.opval->op_targ = tmp;
1995 #endif /* USE_THREADS */
1996 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
1997 /* might be an "our" variable" */
1998 if (SvFLAGS(AvARRAY(PL_comppad_name)[tmp]) & SVpad_OUR) {
1999 /* build ops for a bareword */
2000 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2001 yylval.opval->op_private = OPpCONST_ENTERED;
2002 gv_fetchpv(PL_tokenbuf+1,
2004 ? (GV_ADDMULTI | GV_ADDINEVAL | GV_ADDOUR)
2007 ((PL_tokenbuf[0] == '$') ? SVt_PV
2008 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2013 /* if it's a sort block and they're naming $a or $b */
2014 if (PL_last_lop_op == OP_SORT &&
2015 PL_tokenbuf[0] == '$' &&
2016 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2019 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2020 d < PL_bufend && *d != '\n';
2023 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2024 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2030 yylval.opval = newOP(OP_PADANY, 0);
2031 yylval.opval->op_targ = tmp;
2037 Whine if they've said @foo in a doublequoted string,
2038 and @foo isn't a variable we can find in the symbol
2041 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2042 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2043 if (!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2044 yyerror(Perl_form(aTHX_ "In string, %s now must be written as \\%s",
2045 PL_tokenbuf, PL_tokenbuf));
2048 /* build ops for a bareword */
2049 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2050 yylval.opval->op_private = OPpCONST_ENTERED;
2051 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2052 ((PL_tokenbuf[0] == '$') ? SVt_PV
2053 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2058 /* no identifier pending identification */
2060 switch (PL_lex_state) {
2062 case LEX_NORMAL: /* Some compilers will produce faster */
2063 case LEX_INTERPNORMAL: /* code if we comment these out. */
2067 /* when we've already built the next token, just pull it out of the queue */
2070 yylval = PL_nextval[PL_nexttoke];
2072 PL_lex_state = PL_lex_defer;
2073 PL_expect = PL_lex_expect;
2074 PL_lex_defer = LEX_NORMAL;
2076 return(PL_nexttype[PL_nexttoke]);
2078 /* interpolated case modifiers like \L \U, including \Q and \E.
2079 when we get here, PL_bufptr is at the \
2081 case LEX_INTERPCASEMOD:
2083 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2084 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2086 /* handle \E or end of string */
2087 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2091 if (PL_lex_casemods) {
2092 oldmod = PL_lex_casestack[--PL_lex_casemods];
2093 PL_lex_casestack[PL_lex_casemods] = '\0';
2095 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2097 PL_lex_state = LEX_INTERPCONCAT;
2101 if (PL_bufptr != PL_bufend)
2103 PL_lex_state = LEX_INTERPCONCAT;
2108 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2109 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2110 if (strchr("LU", *s) &&
2111 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2113 PL_lex_casestack[--PL_lex_casemods] = '\0';
2116 if (PL_lex_casemods > 10) {
2117 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2118 if (newlb != PL_lex_casestack) {
2120 PL_lex_casestack = newlb;
2123 PL_lex_casestack[PL_lex_casemods++] = *s;
2124 PL_lex_casestack[PL_lex_casemods] = '\0';
2125 PL_lex_state = LEX_INTERPCONCAT;
2126 PL_nextval[PL_nexttoke].ival = 0;
2129 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2131 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2133 PL_nextval[PL_nexttoke].ival = OP_LC;
2135 PL_nextval[PL_nexttoke].ival = OP_UC;
2137 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2139 Perl_croak(aTHX_ "panic: yylex");
2142 if (PL_lex_starts) {
2151 case LEX_INTERPPUSH:
2152 return sublex_push();
2154 case LEX_INTERPSTART:
2155 if (PL_bufptr == PL_bufend)
2156 return sublex_done();
2158 PL_lex_dojoin = (*PL_bufptr == '@');
2159 PL_lex_state = LEX_INTERPNORMAL;
2160 if (PL_lex_dojoin) {
2161 PL_nextval[PL_nexttoke].ival = 0;
2164 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2165 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2166 force_next(PRIVATEREF);
2168 force_ident("\"", '$');
2169 #endif /* USE_THREADS */
2170 PL_nextval[PL_nexttoke].ival = 0;
2172 PL_nextval[PL_nexttoke].ival = 0;
2174 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2177 if (PL_lex_starts++) {
2183 case LEX_INTERPENDMAYBE:
2184 if (intuit_more(PL_bufptr)) {
2185 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2191 if (PL_lex_dojoin) {
2192 PL_lex_dojoin = FALSE;
2193 PL_lex_state = LEX_INTERPCONCAT;
2196 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2197 && SvEVALED(PL_lex_repl))
2199 if (PL_bufptr != PL_bufend)
2200 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2201 PL_lex_repl = Nullsv;
2204 case LEX_INTERPCONCAT:
2206 if (PL_lex_brackets)
2207 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2209 if (PL_bufptr == PL_bufend)
2210 return sublex_done();
2212 if (SvIVX(PL_linestr) == '\'') {
2213 SV *sv = newSVsv(PL_linestr);
2216 else if ( PL_hints & HINT_NEW_RE )
2217 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2218 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2222 s = scan_const(PL_bufptr);
2224 PL_lex_state = LEX_INTERPCASEMOD;
2226 PL_lex_state = LEX_INTERPSTART;
2229 if (s != PL_bufptr) {
2230 PL_nextval[PL_nexttoke] = yylval;
2233 if (PL_lex_starts++)
2243 PL_lex_state = LEX_NORMAL;
2244 s = scan_formline(PL_bufptr);
2245 if (!PL_lex_formbrack)
2251 PL_oldoldbufptr = PL_oldbufptr;
2254 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2255 exp_name[PL_expect], s);
2261 if (isIDFIRST_lazy(s))
2263 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2266 goto fake_eof; /* emulate EOF on ^D or ^Z */
2271 if (PL_lex_brackets)
2272 yyerror("Missing right curly or square bracket");
2275 if (s++ < PL_bufend)
2276 goto retry; /* ignore stray nulls */
2279 if (!PL_in_eval && !PL_preambled) {
2280 PL_preambled = TRUE;
2281 sv_setpv(PL_linestr,incl_perldb());
2282 if (SvCUR(PL_linestr))
2283 sv_catpv(PL_linestr,";");
2285 while(AvFILLp(PL_preambleav) >= 0) {
2286 SV *tmpsv = av_shift(PL_preambleav);
2287 sv_catsv(PL_linestr, tmpsv);
2288 sv_catpv(PL_linestr, ";");
2291 sv_free((SV*)PL_preambleav);
2292 PL_preambleav = NULL;
2294 if (PL_minus_n || PL_minus_p) {
2295 sv_catpv(PL_linestr, "LINE: while (<>) {");
2297 sv_catpv(PL_linestr,"chomp;");
2299 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2301 GvIMPORTED_AV_on(gv);
2303 if (strchr("/'\"", *PL_splitstr)
2304 && strchr(PL_splitstr + 1, *PL_splitstr))
2305 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2308 s = "'~#\200\1'"; /* surely one char is unused...*/
2309 while (s[1] && strchr(PL_splitstr, *s)) s++;
2311 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2312 "q" + (delim == '\''), delim);
2313 for (s = PL_splitstr; *s; s++) {
2315 sv_catpvn(PL_linestr, "\\", 1);
2316 sv_catpvn(PL_linestr, s, 1);
2318 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2322 sv_catpv(PL_linestr,"@F=split(' ');");
2325 sv_catpv(PL_linestr, "\n");
2326 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2327 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2328 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2329 SV *sv = NEWSV(85,0);
2331 sv_upgrade(sv, SVt_PVMG);
2332 sv_setsv(sv,PL_linestr);
2333 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2338 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2341 if (PL_preprocess && !PL_in_eval)
2342 (void)PerlProc_pclose(PL_rsfp);
2343 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2344 PerlIO_clearerr(PL_rsfp);
2346 (void)PerlIO_close(PL_rsfp);
2348 PL_doextract = FALSE;
2350 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2351 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2352 sv_catpv(PL_linestr,";}");
2353 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2354 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2355 PL_minus_n = PL_minus_p = 0;
2358 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2359 sv_setpv(PL_linestr,"");
2360 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2363 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2364 PL_doextract = FALSE;
2366 /* Incest with pod. */
2367 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2368 sv_setpv(PL_linestr, "");
2369 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2370 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2371 PL_doextract = FALSE;
2375 } while (PL_doextract);
2376 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2377 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2378 SV *sv = NEWSV(85,0);
2380 sv_upgrade(sv, SVt_PVMG);
2381 sv_setsv(sv,PL_linestr);
2382 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2384 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2385 if (CopLINE(PL_curcop) == 1) {
2386 while (s < PL_bufend && isSPACE(*s))
2388 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2392 if (*s == '#' && *(s+1) == '!')
2394 #ifdef ALTERNATE_SHEBANG
2396 static char as[] = ALTERNATE_SHEBANG;
2397 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2398 d = s + (sizeof(as) - 1);
2400 #endif /* ALTERNATE_SHEBANG */
2409 while (*d && !isSPACE(*d))
2413 #ifdef ARG_ZERO_IS_SCRIPT
2414 if (ipathend > ipath) {
2416 * HP-UX (at least) sets argv[0] to the script name,
2417 * which makes $^X incorrect. And Digital UNIX and Linux,
2418 * at least, set argv[0] to the basename of the Perl
2419 * interpreter. So, having found "#!", we'll set it right.
2421 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2422 assert(SvPOK(x) || SvGMAGICAL(x));
2423 if (sv_eq(x, CopFILESV(PL_curcop))) {
2424 sv_setpvn(x, ipath, ipathend - ipath);
2427 TAINT_NOT; /* $^X is always tainted, but that's OK */
2429 #endif /* ARG_ZERO_IS_SCRIPT */
2434 d = instr(s,"perl -");
2436 d = instr(s,"perl");
2438 /* avoid getting into infinite loops when shebang
2439 * line contains "Perl" rather than "perl" */
2441 for (d = ipathend-4; d >= ipath; --d) {
2442 if ((*d == 'p' || *d == 'P')
2443 && !ibcmp(d, "perl", 4))
2453 #ifdef ALTERNATE_SHEBANG
2455 * If the ALTERNATE_SHEBANG on this system starts with a
2456 * character that can be part of a Perl expression, then if
2457 * we see it but not "perl", we're probably looking at the
2458 * start of Perl code, not a request to hand off to some
2459 * other interpreter. Similarly, if "perl" is there, but
2460 * not in the first 'word' of the line, we assume the line
2461 * contains the start of the Perl program.
2463 if (d && *s != '#') {
2465 while (*c && !strchr("; \t\r\n\f\v#", *c))
2468 d = Nullch; /* "perl" not in first word; ignore */
2470 *s = '#'; /* Don't try to parse shebang line */
2472 #endif /* ALTERNATE_SHEBANG */
2477 !instr(s,"indir") &&
2478 instr(PL_origargv[0],"perl"))
2484 while (s < PL_bufend && isSPACE(*s))
2486 if (s < PL_bufend) {
2487 Newz(899,newargv,PL_origargc+3,char*);
2489 while (s < PL_bufend && !isSPACE(*s))
2492 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2495 newargv = PL_origargv;
2497 PerlProc_execv(ipath, newargv);
2498 Perl_croak(aTHX_ "Can't exec %s", ipath);
2501 U32 oldpdb = PL_perldb;
2502 bool oldn = PL_minus_n;
2503 bool oldp = PL_minus_p;
2505 while (*d && !isSPACE(*d)) d++;
2506 while (*d == ' ' || *d == '\t') d++;
2510 if (*d == 'M' || *d == 'm') {
2512 while (*d && !isSPACE(*d)) d++;
2513 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2516 d = moreswitches(d);
2518 if (PERLDB_LINE && !oldpdb ||
2519 ( PL_minus_n || PL_minus_p ) && !(oldn || oldp) )
2520 /* if we have already added "LINE: while (<>) {",
2521 we must not do it again */
2523 sv_setpv(PL_linestr, "");
2524 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2525 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2526 PL_preambled = FALSE;
2528 (void)gv_fetchfile(PL_origfilename);
2535 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2537 PL_lex_state = LEX_FORMLINE;
2542 #ifdef PERL_STRICT_CR
2543 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2545 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
2547 case ' ': case '\t': case '\f': case 013:
2552 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2554 while (s < d && *s != '\n')
2559 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2561 PL_lex_state = LEX_FORMLINE;
2571 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2576 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2579 if (strnEQ(s,"=>",2)) {
2580 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2581 OPERATOR('-'); /* unary minus */
2583 PL_last_uni = PL_oldbufptr;
2584 PL_last_lop_op = OP_FTEREAD; /* good enough */
2586 case 'r': FTST(OP_FTEREAD);
2587 case 'w': FTST(OP_FTEWRITE);
2588 case 'x': FTST(OP_FTEEXEC);
2589 case 'o': FTST(OP_FTEOWNED);
2590 case 'R': FTST(OP_FTRREAD);
2591 case 'W': FTST(OP_FTRWRITE);
2592 case 'X': FTST(OP_FTREXEC);
2593 case 'O': FTST(OP_FTROWNED);
2594 case 'e': FTST(OP_FTIS);
2595 case 'z': FTST(OP_FTZERO);
2596 case 's': FTST(OP_FTSIZE);
2597 case 'f': FTST(OP_FTFILE);
2598 case 'd': FTST(OP_FTDIR);
2599 case 'l': FTST(OP_FTLINK);
2600 case 'p': FTST(OP_FTPIPE);
2601 case 'S': FTST(OP_FTSOCK);
2602 case 'u': FTST(OP_FTSUID);
2603 case 'g': FTST(OP_FTSGID);
2604 case 'k': FTST(OP_FTSVTX);
2605 case 'b': FTST(OP_FTBLK);
2606 case 'c': FTST(OP_FTCHR);
2607 case 't': FTST(OP_FTTTY);
2608 case 'T': FTST(OP_FTTEXT);
2609 case 'B': FTST(OP_FTBINARY);
2610 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
2611 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
2612 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
2614 Perl_croak(aTHX_ "Unrecognized file test: -%c", (int)tmp);
2621 if (PL_expect == XOPERATOR)
2626 else if (*s == '>') {
2629 if (isIDFIRST_lazy(s)) {
2630 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2638 if (PL_expect == XOPERATOR)
2641 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2643 OPERATOR('-'); /* unary minus */
2650 if (PL_expect == XOPERATOR)
2655 if (PL_expect == XOPERATOR)
2658 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2664 if (PL_expect != XOPERATOR) {
2665 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2666 PL_expect = XOPERATOR;
2667 force_ident(PL_tokenbuf, '*');
2680 if (PL_expect == XOPERATOR) {
2684 PL_tokenbuf[0] = '%';
2685 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2686 if (!PL_tokenbuf[1]) {
2688 yyerror("Final % should be \\% or %name");
2691 PL_pending_ident = '%';
2710 switch (PL_expect) {
2713 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
2715 PL_bufptr = s; /* update in case we back off */
2721 PL_expect = XTERMBLOCK;
2725 while (isIDFIRST_lazy(s)) {
2726 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
2728 d = scan_str(d,TRUE,TRUE);
2731 SvREFCNT_dec(PL_lex_stuff);
2732 PL_lex_stuff = Nullsv;
2734 /* MUST advance bufptr here to avoid bogus
2735 "at end of line" context messages from yyerror().
2737 PL_bufptr = s + len;
2738 yyerror("Unterminated attribute parameter in attribute list");
2741 return 0; /* EOF indicator */
2745 SV *sv = newSVpvn(s, len);
2746 sv_catsv(sv, PL_lex_stuff);
2747 attrs = append_elem(OP_LIST, attrs,
2748 newSVOP(OP_CONST, 0, sv));
2749 SvREFCNT_dec(PL_lex_stuff);
2750 PL_lex_stuff = Nullsv;
2753 attrs = append_elem(OP_LIST, attrs,
2754 newSVOP(OP_CONST, 0,
2761 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}' for vi */
2762 if (*s != ';' && *s != tmp) {
2763 char q = ((*s == '\'') ? '"' : '\'');
2764 /* If here for an expression, and parsed no attrs, back off. */
2765 if (tmp == '=' && !attrs) {
2769 /* MUST advance bufptr here to avoid bogus "at end of line"
2770 context messages from yyerror().
2774 yyerror("Unterminated attribute list");
2776 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
2783 PL_nextval[PL_nexttoke].opval = attrs;
2791 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
2792 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
2797 if (CopLINE(PL_curcop) < PL_copline)
2798 PL_copline = CopLINE(PL_curcop);
2809 if (PL_lex_brackets <= 0)
2810 yyerror("Unmatched right square bracket");
2813 if (PL_lex_state == LEX_INTERPNORMAL) {
2814 if (PL_lex_brackets == 0) {
2815 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
2816 PL_lex_state = LEX_INTERPEND;
2823 if (PL_lex_brackets > 100) {
2824 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
2825 if (newlb != PL_lex_brackstack) {
2827 PL_lex_brackstack = newlb;
2830 switch (PL_expect) {
2832 if (PL_lex_formbrack) {
2836 if (PL_oldoldbufptr == PL_last_lop)
2837 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2839 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2840 OPERATOR(HASHBRACK);
2842 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2845 PL_tokenbuf[0] = '\0';
2846 if (d < PL_bufend && *d == '-') {
2847 PL_tokenbuf[0] = '-';
2849 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2852 if (d < PL_bufend && isIDFIRST_lazy(d)) {
2853 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
2855 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2858 char minus = (PL_tokenbuf[0] == '-');
2859 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2867 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
2872 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2877 if (PL_oldoldbufptr == PL_last_lop)
2878 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2880 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2883 OPERATOR(HASHBRACK);
2884 /* This hack serves to disambiguate a pair of curlies
2885 * as being a block or an anon hash. Normally, expectation
2886 * determines that, but in cases where we're not in a
2887 * position to expect anything in particular (like inside
2888 * eval"") we have to resolve the ambiguity. This code
2889 * covers the case where the first term in the curlies is a
2890 * quoted string. Most other cases need to be explicitly
2891 * disambiguated by prepending a `+' before the opening
2892 * curly in order to force resolution as an anon hash.
2894 * XXX should probably propagate the outer expectation
2895 * into eval"" to rely less on this hack, but that could
2896 * potentially break current behavior of eval"".
2900 if (*s == '\'' || *s == '"' || *s == '`') {
2901 /* common case: get past first string, handling escapes */
2902 for (t++; t < PL_bufend && *t != *s;)
2903 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2907 else if (*s == 'q') {
2910 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
2914 char open, close, term;
2917 while (t < PL_bufend && isSPACE(*t))
2921 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2925 for (t++; t < PL_bufend; t++) {
2926 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
2928 else if (*t == open)
2932 for (t++; t < PL_bufend; t++) {
2933 if (*t == '\\' && t+1 < PL_bufend)
2935 else if (*t == close && --brackets <= 0)
2937 else if (*t == open)
2943 else if (isALNUM_lazy(t)) {
2945 while (t < PL_bufend && isALNUM_lazy(t))
2948 while (t < PL_bufend && isSPACE(*t))
2950 /* if comma follows first term, call it an anon hash */
2951 /* XXX it could be a comma expression with loop modifiers */
2952 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2953 || (*t == '=' && t[1] == '>')))
2954 OPERATOR(HASHBRACK);
2955 if (PL_expect == XREF)
2958 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
2964 yylval.ival = CopLINE(PL_curcop);
2965 if (isSPACE(*s) || *s == '#')
2966 PL_copline = NOLINE; /* invalidate current command line number */
2971 if (PL_lex_brackets <= 0)
2972 yyerror("Unmatched right curly bracket");
2974 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
2975 if (PL_lex_brackets < PL_lex_formbrack)
2976 PL_lex_formbrack = 0;
2977 if (PL_lex_state == LEX_INTERPNORMAL) {
2978 if (PL_lex_brackets == 0) {
2979 if (PL_expect & XFAKEBRACK) {
2980 PL_expect &= XENUMMASK;
2981 PL_lex_state = LEX_INTERPEND;
2983 return yylex(); /* ignore fake brackets */
2985 if (*s == '-' && s[1] == '>')
2986 PL_lex_state = LEX_INTERPENDMAYBE;
2987 else if (*s != '[' && *s != '{')
2988 PL_lex_state = LEX_INTERPEND;
2991 if (PL_expect & XFAKEBRACK) {
2992 PL_expect &= XENUMMASK;
2994 return yylex(); /* ignore fake brackets */
3004 if (PL_expect == XOPERATOR) {
3005 if (ckWARN(WARN_SEMICOLON) && isIDFIRST_lazy(s) && PL_bufptr == PL_linestart) {
3006 CopLINE_dec(PL_curcop);
3007 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3008 CopLINE_inc(PL_curcop);
3013 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3015 PL_expect = XOPERATOR;
3016 force_ident(PL_tokenbuf, '&');
3020 yylval.ival = (OPpENTERSUB_AMPER<<8);
3039 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3040 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3042 if (PL_expect == XSTATE && isALPHA(tmp) &&
3043 (s == PL_linestart+1 || s[-2] == '\n') )
3045 if (PL_in_eval && !PL_rsfp) {
3050 if (strnEQ(s,"=cut",4)) {
3064 PL_doextract = TRUE;
3067 if (PL_lex_brackets < PL_lex_formbrack) {
3069 #ifdef PERL_STRICT_CR
3070 for (t = s; *t == ' ' || *t == '\t'; t++) ;
3072 for (t = s; *t == ' ' || *t == '\t' || *t == '\r'; t++) ;
3074 if (*t == '\n' || *t == '#') {
3092 if (PL_expect != XOPERATOR) {
3093 if (s[1] != '<' && !strchr(s,'>'))
3096 s = scan_heredoc(s);
3098 s = scan_inputsymbol(s);
3099 TERM(sublex_start());
3104 SHop(OP_LEFT_SHIFT);
3118 SHop(OP_RIGHT_SHIFT);
3127 if (PL_expect == XOPERATOR) {
3128 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3131 return ','; /* grandfather non-comma-format format */
3135 if (s[1] == '#' && (isIDFIRST_lazy(s+2) || strchr("{$:+-", s[2]))) {
3136 PL_tokenbuf[0] = '@';
3137 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3138 sizeof PL_tokenbuf - 1, FALSE);
3139 if (PL_expect == XOPERATOR)
3140 no_op("Array length", s);
3141 if (!PL_tokenbuf[1])
3143 PL_expect = XOPERATOR;
3144 PL_pending_ident = '#';
3148 PL_tokenbuf[0] = '$';
3149 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3150 sizeof PL_tokenbuf - 1, FALSE);
3151 if (PL_expect == XOPERATOR)
3153 if (!PL_tokenbuf[1]) {
3155 yyerror("Final $ should be \\$ or $name");
3159 /* This kludge not intended to be bulletproof. */
3160 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3161 yylval.opval = newSVOP(OP_CONST, 0,
3162 newSViv((IV)PL_compiling.cop_arybase));
3163 yylval.opval->op_private = OPpCONST_ARYBASE;
3169 if (PL_lex_state == LEX_NORMAL)
3172 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3175 PL_tokenbuf[0] = '@';
3176 if (ckWARN(WARN_SYNTAX)) {
3178 isSPACE(*t) || isALNUM_lazy(t) || *t == '$';
3181 PL_bufptr = skipspace(PL_bufptr);
3182 while (t < PL_bufend && *t != ']')
3184 Perl_warner(aTHX_ WARN_SYNTAX,
3185 "Multidimensional syntax %.*s not supported",
3186 (t - PL_bufptr) + 1, PL_bufptr);
3190 else if (*s == '{') {
3191 PL_tokenbuf[0] = '%';
3192 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3193 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3195 char tmpbuf[sizeof PL_tokenbuf];
3197 for (t++; isSPACE(*t); t++) ;
3198 if (isIDFIRST_lazy(t)) {
3199 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3200 for (; isSPACE(*t); t++) ;
3201 if (*t == ';' && get_cv(tmpbuf, FALSE))
3202 Perl_warner(aTHX_ WARN_SYNTAX,
3203 "You need to quote \"%s\"", tmpbuf);
3209 PL_expect = XOPERATOR;
3210 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3211 bool islop = (PL_last_lop == PL_oldoldbufptr);
3212 if (!islop || PL_last_lop_op == OP_GREPSTART)
3213 PL_expect = XOPERATOR;
3214 else if (strchr("$@\"'`q", *s))
3215 PL_expect = XTERM; /* e.g. print $fh "foo" */
3216 else if (strchr("&*<%", *s) && isIDFIRST_lazy(s+1))
3217 PL_expect = XTERM; /* e.g. print $fh &sub */
3218 else if (isIDFIRST_lazy(s)) {
3219 char tmpbuf[sizeof PL_tokenbuf];
3220 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3221 if (tmp = keyword(tmpbuf, len)) {
3222 /* binary operators exclude handle interpretations */
3234 PL_expect = XTERM; /* e.g. print $fh length() */
3239 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3240 if (gv && GvCVu(gv))
3241 PL_expect = XTERM; /* e.g. print $fh subr() */
3244 else if (isDIGIT(*s))
3245 PL_expect = XTERM; /* e.g. print $fh 3 */
3246 else if (*s == '.' && isDIGIT(s[1]))
3247 PL_expect = XTERM; /* e.g. print $fh .3 */
3248 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3249 PL_expect = XTERM; /* e.g. print $fh -1 */
3250 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3251 PL_expect = XTERM; /* print $fh <<"EOF" */
3253 PL_pending_ident = '$';
3257 if (PL_expect == XOPERATOR)
3259 PL_tokenbuf[0] = '@';
3260 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3261 if (!PL_tokenbuf[1]) {
3263 yyerror("Final @ should be \\@ or @name");
3266 if (PL_lex_state == LEX_NORMAL)
3268 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3270 PL_tokenbuf[0] = '%';
3272 /* Warn about @ where they meant $. */
3273 if (ckWARN(WARN_SYNTAX)) {
3274 if (*s == '[' || *s == '{') {
3276 while (*t && (isALNUM_lazy(t) || strchr(" \t$#+-'\"", *t)))
3278 if (*t == '}' || *t == ']') {
3280 PL_bufptr = skipspace(PL_bufptr);
3281 Perl_warner(aTHX_ WARN_SYNTAX,
3282 "Scalar value %.*s better written as $%.*s",
3283 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3288 PL_pending_ident = '@';
3291 case '/': /* may either be division or pattern */
3292 case '?': /* may either be conditional or pattern */
3293 if (PL_expect != XOPERATOR) {
3294 /* Disable warning on "study /blah/" */
3295 if (PL_oldoldbufptr == PL_last_uni
3296 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3297 || memNE(PL_last_uni, "study", 5) || isALNUM_lazy(PL_last_uni+5)))
3299 s = scan_pat(s,OP_MATCH);
3300 TERM(sublex_start());
3308 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3309 #ifdef PERL_STRICT_CR
3312 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3314 && (s == PL_linestart || s[-1] == '\n') )
3316 PL_lex_formbrack = 0;
3320 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3326 yylval.ival = OPf_SPECIAL;
3332 if (PL_expect != XOPERATOR)
3337 case '0': case '1': case '2': case '3': case '4':
3338 case '5': case '6': case '7': case '8': case '9':
3340 if (PL_expect == XOPERATOR)
3345 s = scan_str(s,FALSE,FALSE);
3346 if (PL_expect == XOPERATOR) {
3347 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3350 return ','; /* grandfather non-comma-format format */
3356 missingterm((char*)0);
3357 yylval.ival = OP_CONST;
3358 TERM(sublex_start());
3361 s = scan_str(s,FALSE,FALSE);
3362 if (PL_expect == XOPERATOR) {
3363 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3366 return ','; /* grandfather non-comma-format format */
3372 missingterm((char*)0);
3373 yylval.ival = OP_CONST;
3374 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3375 if (*d == '$' || *d == '@' || *d == '\\' || *d & 0x80) {
3376 yylval.ival = OP_STRINGIFY;
3380 TERM(sublex_start());
3383 s = scan_str(s,FALSE,FALSE);
3384 if (PL_expect == XOPERATOR)
3385 no_op("Backticks",s);
3387 missingterm((char*)0);
3388 yylval.ival = OP_BACKTICK;
3390 TERM(sublex_start());
3394 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3395 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3397 if (PL_expect == XOPERATOR)
3398 no_op("Backslash",s);
3402 if (isDIGIT(s[1]) && PL_expect == XTERM) {
3406 while (isDIGIT(*start))
3408 if (*start == '.' && isDIGIT(start[1])) {
3415 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3455 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3457 /* Some keywords can be followed by any delimiter, including ':' */
3458 tmp = (len == 1 && strchr("msyq", PL_tokenbuf[0]) ||
3459 len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3460 (PL_tokenbuf[0] == 'q' &&
3461 strchr("qwxr", PL_tokenbuf[1]))));
3463 /* x::* is just a word, unless x is "CORE" */
3464 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3468 while (d < PL_bufend && isSPACE(*d))
3469 d++; /* no comments skipped here, or s### is misparsed */
3471 /* Is this a label? */
3472 if (!tmp && PL_expect == XSTATE
3473 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3475 yylval.pval = savepv(PL_tokenbuf);
3480 /* Check for keywords */
3481 tmp = keyword(PL_tokenbuf, len);
3483 /* Is this a word before a => operator? */
3484 if (strnEQ(d,"=>",2)) {
3486 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3487 yylval.opval->op_private = OPpCONST_BARE;
3491 if (tmp < 0) { /* second-class keyword? */
3492 GV *ogv = Nullgv; /* override (winner) */
3493 GV *hgv = Nullgv; /* hidden (loser) */
3494 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3496 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3499 if (GvIMPORTED_CV(gv))
3501 else if (! CvMETHOD(cv))
3505 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3506 (gv = *gvp) != (GV*)&PL_sv_undef &&
3507 GvCVu(gv) && GvIMPORTED_CV(gv))
3513 tmp = 0; /* overridden by import or by GLOBAL */
3516 && -tmp==KEY_lock /* XXX generalizable kludge */
3518 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3520 tmp = 0; /* any sub overrides "weak" keyword */
3522 else { /* no override */
3526 if (ckWARN(WARN_AMBIGUOUS) && hgv
3527 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3528 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3529 "Ambiguous call resolved as CORE::%s(), %s",
3530 GvENAME(hgv), "qualify as such or use &");
3537 default: /* not a keyword */
3540 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3542 /* Get the rest if it looks like a package qualifier */
3544 if (*s == '\'' || *s == ':' && s[1] == ':') {
3546 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3549 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3550 *s == '\'' ? "'" : "::");
3554 if (PL_expect == XOPERATOR) {
3555 if (PL_bufptr == PL_linestart) {
3556 CopLINE_dec(PL_curcop);
3557 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3558 CopLINE_inc(PL_curcop);
3561 no_op("Bareword",s);
3564 /* Look for a subroutine with this name in current package,
3565 unless name is "Foo::", in which case Foo is a bearword
3566 (and a package name). */
3569 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3571 if (ckWARN(WARN_UNSAFE) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3572 Perl_warner(aTHX_ WARN_UNSAFE,
3573 "Bareword \"%s\" refers to nonexistent package",
3576 PL_tokenbuf[len] = '\0';
3583 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3586 /* if we saw a global override before, get the right name */
3589 sv = newSVpvn("CORE::GLOBAL::",14);
3590 sv_catpv(sv,PL_tokenbuf);
3593 sv = newSVpv(PL_tokenbuf,0);
3595 /* Presume this is going to be a bareword of some sort. */
3598 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3599 yylval.opval->op_private = OPpCONST_BARE;
3601 /* And if "Foo::", then that's what it certainly is. */
3606 /* See if it's the indirect object for a list operator. */
3608 if (PL_oldoldbufptr &&
3609 PL_oldoldbufptr < PL_bufptr &&
3610 (PL_oldoldbufptr == PL_last_lop
3611 || PL_oldoldbufptr == PL_last_uni) &&
3612 /* NO SKIPSPACE BEFORE HERE! */
3613 (PL_expect == XREF ||
3614 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3616 bool immediate_paren = *s == '(';
3618 /* (Now we can afford to cross potential line boundary.) */
3621 /* Two barewords in a row may indicate method call. */
3623 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp=intuit_method(s,gv)))
3626 /* If not a declared subroutine, it's an indirect object. */
3627 /* (But it's an indir obj regardless for sort.) */
3629 if ((PL_last_lop_op == OP_SORT ||
3630 (!immediate_paren && (!gv || !GvCVu(gv)))) &&
3631 (PL_last_lop_op != OP_MAPSTART &&
3632 PL_last_lop_op != OP_GREPSTART))
3634 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3639 /* If followed by a paren, it's certainly a subroutine. */
3641 PL_expect = XOPERATOR;
3645 if (gv && GvCVu(gv)) {
3646 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
3647 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
3652 PL_nextval[PL_nexttoke].opval = yylval.opval;
3653 PL_expect = XOPERATOR;
3659 /* If followed by var or block, call it a method (unless sub) */
3661 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3662 PL_last_lop = PL_oldbufptr;
3663 PL_last_lop_op = OP_METHOD;
3667 /* If followed by a bareword, see if it looks like indir obj. */
3669 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp = intuit_method(s,gv)))
3672 /* Not a method, so call it a subroutine (if defined) */
3674 if (gv && GvCVu(gv)) {
3676 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
3677 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3678 "Ambiguous use of -%s resolved as -&%s()",
3679 PL_tokenbuf, PL_tokenbuf);
3680 /* Check for a constant sub */
3682 if ((sv = cv_const_sv(cv))) {
3684 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3685 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3686 yylval.opval->op_private = 0;
3690 /* Resolve to GV now. */
3691 op_free(yylval.opval);
3692 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3693 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
3694 PL_last_lop = PL_oldbufptr;
3695 PL_last_lop_op = OP_ENTERSUB;
3696 /* Is there a prototype? */
3699 char *proto = SvPV((SV*)cv, len);
3702 if (strEQ(proto, "$"))
3704 if (*proto == '&' && *s == '{') {
3705 sv_setpv(PL_subname,"__ANON__");
3709 PL_nextval[PL_nexttoke].opval = yylval.opval;
3715 /* Call it a bare word */
3717 if (PL_hints & HINT_STRICT_SUBS)
3718 yylval.opval->op_private |= OPpCONST_STRICT;
3721 if (ckWARN(WARN_RESERVED)) {
3722 if (lastchar != '-') {
3723 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
3725 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
3732 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
3733 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3734 "Operator or semicolon missing before %c%s",
3735 lastchar, PL_tokenbuf);
3736 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3737 "Ambiguous use of %c resolved as operator %c",
3738 lastchar, lastchar);
3744 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3745 newSVpv(CopFILE(PL_curcop),0));
3749 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3750 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
3753 case KEY___PACKAGE__:
3754 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3756 ? newSVsv(PL_curstname)
3765 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
3766 char *pname = "main";
3767 if (PL_tokenbuf[2] == 'D')
3768 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
3769 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
3772 GvIOp(gv) = newIO();
3773 IoIFP(GvIOp(gv)) = PL_rsfp;
3774 #if defined(HAS_FCNTL) && defined(F_SETFD)
3776 int fd = PerlIO_fileno(PL_rsfp);
3777 fcntl(fd,F_SETFD,fd >= 3);
3780 /* Mark this internal pseudo-handle as clean */
3781 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3783 IoTYPE(GvIOp(gv)) = '|';
3784 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
3785 IoTYPE(GvIOp(gv)) = '-';
3787 IoTYPE(GvIOp(gv)) = '<';
3799 if (PL_expect == XSTATE) {
3806 if (*s == ':' && s[1] == ':') {
3809 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3810 tmp = keyword(PL_tokenbuf, len);
3824 LOP(OP_ACCEPT,XTERM);
3830 LOP(OP_ATAN2,XTERM);
3839 LOP(OP_BLESS,XTERM);
3848 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
3865 if (!PL_cryptseen) {
3866 PL_cryptseen = TRUE;
3870 LOP(OP_CRYPT,XTERM);
3873 if (ckWARN(WARN_OCTAL)) {
3874 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
3875 if (*d != '0' && isDIGIT(*d))
3876 Perl_warner(aTHX_ WARN_OCTAL,
3877 "chmod: mode argument is missing initial 0");
3879 LOP(OP_CHMOD,XTERM);
3882 LOP(OP_CHOWN,XTERM);
3885 LOP(OP_CONNECT,XTERM);
3901 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3905 PL_hints |= HINT_BLOCK_SCOPE;
3915 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
3916 LOP(OP_DBMOPEN,XTERM);
3922 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3929 yylval.ival = CopLINE(PL_curcop);
3943 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
3944 UNIBRACK(OP_ENTEREVAL);
3959 case KEY_endhostent:
3965 case KEY_endservent:
3968 case KEY_endprotoent:
3979 yylval.ival = CopLINE(PL_curcop);
3981 if (PL_expect == XSTATE && isIDFIRST_lazy(s)) {
3983 if ((PL_bufend - p) >= 3 &&
3984 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3986 else if ((PL_bufend - p) >= 4 &&
3987 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
3990 if (isIDFIRST_lazy(p)) {
3991 p = scan_ident(p, PL_bufend,
3992 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3996 Perl_croak(aTHX_ "Missing $ on loop variable");
4001 LOP(OP_FORMLINE,XTERM);
4007 LOP(OP_FCNTL,XTERM);
4013 LOP(OP_FLOCK,XTERM);
4022 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
4025 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4040 case KEY_getpriority:
4041 LOP(OP_GETPRIORITY,XTERM);
4043 case KEY_getprotobyname:
4046 case KEY_getprotobynumber:
4047 LOP(OP_GPBYNUMBER,XTERM);
4049 case KEY_getprotoent:
4061 case KEY_getpeername:
4062 UNI(OP_GETPEERNAME);
4064 case KEY_gethostbyname:
4067 case KEY_gethostbyaddr:
4068 LOP(OP_GHBYADDR,XTERM);
4070 case KEY_gethostent:
4073 case KEY_getnetbyname:
4076 case KEY_getnetbyaddr:
4077 LOP(OP_GNBYADDR,XTERM);
4082 case KEY_getservbyname:
4083 LOP(OP_GSBYNAME,XTERM);
4085 case KEY_getservbyport:
4086 LOP(OP_GSBYPORT,XTERM);
4088 case KEY_getservent:
4091 case KEY_getsockname:
4092 UNI(OP_GETSOCKNAME);
4094 case KEY_getsockopt:
4095 LOP(OP_GSOCKOPT,XTERM);
4117 yylval.ival = CopLINE(PL_curcop);
4121 LOP(OP_INDEX,XTERM);
4127 LOP(OP_IOCTL,XTERM);
4139 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4171 LOP(OP_LISTEN,XTERM);
4180 s = scan_pat(s,OP_MATCH);
4181 TERM(sublex_start());
4184 LOP(OP_MAPSTART, *s == '(' ? XTERM : XREF);
4187 LOP(OP_MKDIR,XTERM);
4190 LOP(OP_MSGCTL,XTERM);
4193 LOP(OP_MSGGET,XTERM);
4196 LOP(OP_MSGRCV,XTERM);
4199 LOP(OP_MSGSND,XTERM);
4205 if (isIDFIRST_lazy(s)) {
4206 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4207 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4209 PL_in_my_stash = gv_stashpv(PL_tokenbuf, FALSE);
4210 if (!PL_in_my_stash) {
4213 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4221 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4228 if (PL_expect != XSTATE)
4229 yyerror("\"no\" not allowed in expression");
4230 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4231 s = force_version(s);
4236 if (*s == '(' || (s = skipspace(s), *s == '('))
4243 if (isIDFIRST_lazy(s)) {
4245 for (d = s; isALNUM_lazy(d); d++) ;
4247 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_AMBIGUOUS))
4248 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4249 "Precedence problem: open %.*s should be open(%.*s)",
4255 yylval.ival = OP_OR;
4265 LOP(OP_OPEN_DIR,XTERM);
4268 checkcomma(s,PL_tokenbuf,"filehandle");
4272 checkcomma(s,PL_tokenbuf,"filehandle");
4291 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4295 LOP(OP_PIPE_OP,XTERM);
4298 s = scan_str(s,FALSE,FALSE);
4300 missingterm((char*)0);
4301 yylval.ival = OP_CONST;
4302 TERM(sublex_start());
4308 s = scan_str(s,FALSE,FALSE);
4310 missingterm((char*)0);
4312 if (SvCUR(PL_lex_stuff)) {
4315 d = SvPV_force(PL_lex_stuff, len);
4317 for (; isSPACE(*d) && len; --len, ++d) ;
4320 if (!warned && ckWARN(WARN_SYNTAX)) {
4321 for (; !isSPACE(*d) && len; --len, ++d) {
4323 Perl_warner(aTHX_ WARN_SYNTAX,
4324 "Possible attempt to separate words with commas");
4327 else if (*d == '#') {
4328 Perl_warner(aTHX_ WARN_SYNTAX,
4329 "Possible attempt to put comments in qw() list");
4335 for (; !isSPACE(*d) && len; --len, ++d) ;
4337 words = append_elem(OP_LIST, words,
4338 newSVOP(OP_CONST, 0, newSVpvn(b, d-b)));
4342 PL_nextval[PL_nexttoke].opval = words;
4347 SvREFCNT_dec(PL_lex_stuff);
4348 PL_lex_stuff = Nullsv;
4353 s = scan_str(s,FALSE,FALSE);
4355 missingterm((char*)0);
4356 yylval.ival = OP_STRINGIFY;
4357 if (SvIVX(PL_lex_stuff) == '\'')
4358 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4359 TERM(sublex_start());
4362 s = scan_pat(s,OP_QR);
4363 TERM(sublex_start());
4366 s = scan_str(s,FALSE,FALSE);
4368 missingterm((char*)0);
4369 yylval.ival = OP_BACKTICK;
4371 TERM(sublex_start());
4378 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4379 s = force_version(s);
4382 *PL_tokenbuf = '\0';
4383 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4384 if (isIDFIRST_lazy(PL_tokenbuf))
4385 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4387 yyerror("<> should be quotes");
4395 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4399 LOP(OP_RENAME,XTERM);
4408 LOP(OP_RINDEX,XTERM);
4431 LOP(OP_REVERSE,XTERM);
4442 TERM(sublex_start());
4444 TOKEN(1); /* force error */
4453 LOP(OP_SELECT,XTERM);
4459 LOP(OP_SEMCTL,XTERM);
4462 LOP(OP_SEMGET,XTERM);
4465 LOP(OP_SEMOP,XTERM);
4471 LOP(OP_SETPGRP,XTERM);
4473 case KEY_setpriority:
4474 LOP(OP_SETPRIORITY,XTERM);
4476 case KEY_sethostent:
4482 case KEY_setservent:
4485 case KEY_setprotoent:
4495 LOP(OP_SEEKDIR,XTERM);
4497 case KEY_setsockopt:
4498 LOP(OP_SSOCKOPT,XTERM);
4504 LOP(OP_SHMCTL,XTERM);
4507 LOP(OP_SHMGET,XTERM);
4510 LOP(OP_SHMREAD,XTERM);
4513 LOP(OP_SHMWRITE,XTERM);
4516 LOP(OP_SHUTDOWN,XTERM);
4525 LOP(OP_SOCKET,XTERM);
4527 case KEY_socketpair:
4528 LOP(OP_SOCKPAIR,XTERM);
4531 checkcomma(s,PL_tokenbuf,"subroutine name");
4533 if (*s == ';' || *s == ')') /* probably a close */
4534 Perl_croak(aTHX_ "sort is now a reserved word");
4536 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4540 LOP(OP_SPLIT,XTERM);
4543 LOP(OP_SPRINTF,XTERM);
4546 LOP(OP_SPLICE,XTERM);
4561 LOP(OP_SUBSTR,XTERM);
4567 char tmpbuf[sizeof PL_tokenbuf];
4569 expectation attrful;
4570 bool have_name, have_proto;
4575 if (isIDFIRST_lazy(s) || *s == '\'' ||
4576 (*s == ':' && s[1] == ':'))
4579 attrful = XATTRBLOCK;
4580 /* remember buffer pos'n for later force_word */
4581 tboffset = s - PL_oldbufptr;
4582 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4583 if (strchr(tmpbuf, ':'))
4584 sv_setpv(PL_subname, tmpbuf);
4586 sv_setsv(PL_subname,PL_curstname);
4587 sv_catpvn(PL_subname,"::",2);
4588 sv_catpvn(PL_subname,tmpbuf,len);
4595 Perl_croak(aTHX_ "Missing name in \"my sub\"");
4596 PL_expect = XTERMBLOCK;
4597 attrful = XATTRTERM;
4598 sv_setpv(PL_subname,"?");
4602 if (key == KEY_format) {
4604 PL_lex_formbrack = PL_lex_brackets + 1;
4606 (void) force_word(PL_oldbufptr + tboffset, WORD,
4611 /* Look for a prototype */
4615 s = scan_str(s,FALSE,FALSE);
4618 SvREFCNT_dec(PL_lex_stuff);
4619 PL_lex_stuff = Nullsv;
4620 Perl_croak(aTHX_ "Prototype not terminated");
4623 d = SvPVX(PL_lex_stuff);
4625 for (p = d; *p; ++p) {
4630 SvCUR(PL_lex_stuff) = tmp;
4638 if (*s == ':' && s[1] != ':')
4639 PL_expect = attrful;
4642 PL_nextval[PL_nexttoke].opval =
4643 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4644 PL_lex_stuff = Nullsv;
4648 sv_setpv(PL_subname,"__ANON__");
4651 (void) force_word(PL_oldbufptr + tboffset, WORD,
4660 LOP(OP_SYSTEM,XREF);
4663 LOP(OP_SYMLINK,XTERM);
4666 LOP(OP_SYSCALL,XTERM);
4669 LOP(OP_SYSOPEN,XTERM);
4672 LOP(OP_SYSSEEK,XTERM);
4675 LOP(OP_SYSREAD,XTERM);
4678 LOP(OP_SYSWRITE,XTERM);
4682 TERM(sublex_start());
4703 LOP(OP_TRUNCATE,XTERM);
4715 yylval.ival = CopLINE(PL_curcop);
4719 yylval.ival = CopLINE(PL_curcop);
4723 LOP(OP_UNLINK,XTERM);
4729 LOP(OP_UNPACK,XTERM);
4732 LOP(OP_UTIME,XTERM);
4735 if (ckWARN(WARN_OCTAL)) {
4736 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4737 if (*d != '0' && isDIGIT(*d))
4738 Perl_warner(aTHX_ WARN_OCTAL,
4739 "umask: argument is missing initial 0");
4744 LOP(OP_UNSHIFT,XTERM);
4747 if (PL_expect != XSTATE)
4748 yyerror("\"use\" not allowed in expression");
4750 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4751 s = force_version(s);
4752 if (*s == ';' || (s = skipspace(s), *s == ';')) {
4753 PL_nextval[PL_nexttoke].opval = Nullop;
4758 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4759 s = force_version(s);
4771 yylval.ival = CopLINE(PL_curcop);
4775 PL_hints |= HINT_BLOCK_SCOPE;
4782 LOP(OP_WAITPID,XTERM);
4790 static char ctl_l[2];
4792 if (ctl_l[0] == '\0')
4793 ctl_l[0] = toCTRL('L');
4794 gv_fetchpv(ctl_l,TRUE, SVt_PV);
4797 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
4802 if (PL_expect == XOPERATOR)
4808 yylval.ival = OP_XOR;
4813 TERM(sublex_start());
4819 Perl_keyword(pTHX_ register char *d, I32 len)
4824 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
4825 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
4826 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
4827 if (strEQ(d,"__DATA__")) return KEY___DATA__;
4828 if (strEQ(d,"__END__")) return KEY___END__;
4832 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
4837 if (strEQ(d,"and")) return -KEY_and;
4838 if (strEQ(d,"abs")) return -KEY_abs;
4841 if (strEQ(d,"alarm")) return -KEY_alarm;
4842 if (strEQ(d,"atan2")) return -KEY_atan2;
4845 if (strEQ(d,"accept")) return -KEY_accept;
4850 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
4853 if (strEQ(d,"bless")) return -KEY_bless;
4854 if (strEQ(d,"bind")) return -KEY_bind;
4855 if (strEQ(d,"binmode")) return -KEY_binmode;
4858 if (strEQ(d,"CORE")) return -KEY_CORE;
4863 if (strEQ(d,"cmp")) return -KEY_cmp;
4864 if (strEQ(d,"chr")) return -KEY_chr;
4865 if (strEQ(d,"cos")) return -KEY_cos;
4868 if (strEQ(d,"chop")) return KEY_chop;
4871 if (strEQ(d,"close")) return -KEY_close;
4872 if (strEQ(d,"chdir")) return -KEY_chdir;
4873 if (strEQ(d,"chomp")) return KEY_chomp;
4874 if (strEQ(d,"chmod")) return -KEY_chmod;
4875 if (strEQ(d,"chown")) return -KEY_chown;
4876 if (strEQ(d,"crypt")) return -KEY_crypt;
4879 if (strEQ(d,"chroot")) return -KEY_chroot;
4880 if (strEQ(d,"caller")) return -KEY_caller;
4883 if (strEQ(d,"connect")) return -KEY_connect;
4886 if (strEQ(d,"closedir")) return -KEY_closedir;
4887 if (strEQ(d,"continue")) return -KEY_continue;
4892 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
4897 if (strEQ(d,"do")) return KEY_do;
4900 if (strEQ(d,"die")) return -KEY_die;
4903 if (strEQ(d,"dump")) return -KEY_dump;
4906 if (strEQ(d,"delete")) return KEY_delete;
4909 if (strEQ(d,"defined")) return KEY_defined;
4910 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
4913 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
4918 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
4919 if (strEQ(d,"END")) return KEY_END;
4924 if (strEQ(d,"eq")) return -KEY_eq;
4927 if (strEQ(d,"eof")) return -KEY_eof;
4928 if (strEQ(d,"exp")) return -KEY_exp;
4931 if (strEQ(d,"else")) return KEY_else;
4932 if (strEQ(d,"exit")) return -KEY_exit;
4933 if (strEQ(d,"eval")) return KEY_eval;
4934 if (strEQ(d,"exec")) return -KEY_exec;
4935 if (strEQ(d,"each")) return KEY_each;
4938 if (strEQ(d,"elsif")) return KEY_elsif;
4941 if (strEQ(d,"exists")) return KEY_exists;
4942 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
4945 if (strEQ(d,"endgrent")) return -KEY_endgrent;
4946 if (strEQ(d,"endpwent")) return -KEY_endpwent;
4949 if (strEQ(d,"endnetent")) return -KEY_endnetent;
4952 if (strEQ(d,"endhostent")) return -KEY_endhostent;
4953 if (strEQ(d,"endservent")) return -KEY_endservent;
4956 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
4963 if (strEQ(d,"for")) return KEY_for;
4966 if (strEQ(d,"fork")) return -KEY_fork;
4969 if (strEQ(d,"fcntl")) return -KEY_fcntl;
4970 if (strEQ(d,"flock")) return -KEY_flock;
4973 if (strEQ(d,"format")) return KEY_format;
4974 if (strEQ(d,"fileno")) return -KEY_fileno;
4977 if (strEQ(d,"foreach")) return KEY_foreach;
4980 if (strEQ(d,"formline")) return -KEY_formline;
4986 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
4987 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4991 if (strnEQ(d,"get",3)) {
4996 if (strEQ(d,"ppid")) return -KEY_getppid;
4997 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5000 if (strEQ(d,"pwent")) return -KEY_getpwent;
5001 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5002 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5005 if (strEQ(d,"peername")) return -KEY_getpeername;
5006 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5007 if (strEQ(d,"priority")) return -KEY_getpriority;
5010 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5013 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5017 else if (*d == 'h') {
5018 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5019 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5020 if (strEQ(d,"hostent")) return -KEY_gethostent;
5022 else if (*d == 'n') {
5023 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5024 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5025 if (strEQ(d,"netent")) return -KEY_getnetent;
5027 else if (*d == 's') {
5028 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5029 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5030 if (strEQ(d,"servent")) return -KEY_getservent;
5031 if (strEQ(d,"sockname")) return -KEY_getsockname;
5032 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5034 else if (*d == 'g') {
5035 if (strEQ(d,"grent")) return -KEY_getgrent;
5036 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5037 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5039 else if (*d == 'l') {
5040 if (strEQ(d,"login")) return -KEY_getlogin;
5042 else if (strEQ(d,"c")) return -KEY_getc;
5047 if (strEQ(d,"gt")) return -KEY_gt;
5048 if (strEQ(d,"ge")) return -KEY_ge;
5051 if (strEQ(d,"grep")) return KEY_grep;
5052 if (strEQ(d,"goto")) return KEY_goto;
5053 if (strEQ(d,"glob")) return KEY_glob;
5056 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5061 if (strEQ(d,"hex")) return -KEY_hex;
5064 if (strEQ(d,"INIT")) return KEY_INIT;
5069 if (strEQ(d,"if")) return KEY_if;
5072 if (strEQ(d,"int")) return -KEY_int;
5075 if (strEQ(d,"index")) return -KEY_index;
5076 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5081 if (strEQ(d,"join")) return -KEY_join;
5085 if (strEQ(d,"keys")) return KEY_keys;
5086 if (strEQ(d,"kill")) return -KEY_kill;
5091 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
5092 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
5098 if (strEQ(d,"lt")) return -KEY_lt;
5099 if (strEQ(d,"le")) return -KEY_le;
5100 if (strEQ(d,"lc")) return -KEY_lc;
5103 if (strEQ(d,"log")) return -KEY_log;
5106 if (strEQ(d,"last")) return KEY_last;
5107 if (strEQ(d,"link")) return -KEY_link;
5108 if (strEQ(d,"lock")) return -KEY_lock;
5111 if (strEQ(d,"local")) return KEY_local;
5112 if (strEQ(d,"lstat")) return -KEY_lstat;
5115 if (strEQ(d,"length")) return -KEY_length;
5116 if (strEQ(d,"listen")) return -KEY_listen;
5119 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5122 if (strEQ(d,"localtime")) return -KEY_localtime;
5128 case 1: return KEY_m;
5130 if (strEQ(d,"my")) return KEY_my;
5133 if (strEQ(d,"map")) return KEY_map;
5136 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5139 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5140 if (strEQ(d,"msgget")) return -KEY_msgget;
5141 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5142 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5147 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
5150 if (strEQ(d,"next")) return KEY_next;
5151 if (strEQ(d,"ne")) return -KEY_ne;
5152 if (strEQ(d,"not")) return -KEY_not;
5153 if (strEQ(d,"no")) return KEY_no;
5158 if (strEQ(d,"or")) return -KEY_or;
5161 if (strEQ(d,"ord")) return -KEY_ord;
5162 if (strEQ(d,"oct")) return -KEY_oct;
5163 if (strEQ(d,"our")) return KEY_our;
5166 if (strEQ(d,"open")) return -KEY_open;
5169 if (strEQ(d,"opendir")) return -KEY_opendir;
5176 if (strEQ(d,"pop")) return KEY_pop;
5177 if (strEQ(d,"pos")) return KEY_pos;
5180 if (strEQ(d,"push")) return KEY_push;
5181 if (strEQ(d,"pack")) return -KEY_pack;
5182 if (strEQ(d,"pipe")) return -KEY_pipe;
5185 if (strEQ(d,"print")) return KEY_print;
5188 if (strEQ(d,"printf")) return KEY_printf;
5191 if (strEQ(d,"package")) return KEY_package;
5194 if (strEQ(d,"prototype")) return KEY_prototype;
5199 if (strEQ(d,"q")) return KEY_q;
5200 if (strEQ(d,"qr")) return KEY_qr;
5201 if (strEQ(d,"qq")) return KEY_qq;
5202 if (strEQ(d,"qw")) return KEY_qw;
5203 if (strEQ(d,"qx")) return KEY_qx;
5205 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5210 if (strEQ(d,"ref")) return -KEY_ref;
5213 if (strEQ(d,"read")) return -KEY_read;
5214 if (strEQ(d,"rand")) return -KEY_rand;
5215 if (strEQ(d,"recv")) return -KEY_recv;
5216 if (strEQ(d,"redo")) return KEY_redo;
5219 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5220 if (strEQ(d,"reset")) return -KEY_reset;
5223 if (strEQ(d,"return")) return KEY_return;
5224 if (strEQ(d,"rename")) return -KEY_rename;
5225 if (strEQ(d,"rindex")) return -KEY_rindex;
5228 if (strEQ(d,"require")) return -KEY_require;
5229 if (strEQ(d,"reverse")) return -KEY_reverse;
5230 if (strEQ(d,"readdir")) return -KEY_readdir;
5233 if (strEQ(d,"readlink")) return -KEY_readlink;
5234 if (strEQ(d,"readline")) return -KEY_readline;
5235 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5238 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5243 if (strEQ(d,"STOP")) return KEY_STOP;
5247 case 0: return KEY_s;
5249 if (strEQ(d,"scalar")) return KEY_scalar;
5254 if (strEQ(d,"seek")) return -KEY_seek;
5255 if (strEQ(d,"send")) return -KEY_send;
5258 if (strEQ(d,"semop")) return -KEY_semop;
5261 if (strEQ(d,"select")) return -KEY_select;
5262 if (strEQ(d,"semctl")) return -KEY_semctl;
5263 if (strEQ(d,"semget")) return -KEY_semget;
5266 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5267 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5270 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5271 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5274 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5277 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5278 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5279 if (strEQ(d,"setservent")) return -KEY_setservent;
5282 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5283 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5290 if (strEQ(d,"shift")) return KEY_shift;
5293 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5294 if (strEQ(d,"shmget")) return -KEY_shmget;
5297 if (strEQ(d,"shmread")) return -KEY_shmread;
5300 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5301 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5306 if (strEQ(d,"sin")) return -KEY_sin;
5309 if (strEQ(d,"sleep")) return -KEY_sleep;
5312 if (strEQ(d,"sort")) return KEY_sort;
5313 if (strEQ(d,"socket")) return -KEY_socket;
5314 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5317 if (strEQ(d,"split")) return KEY_split;
5318 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5319 if (strEQ(d,"splice")) return KEY_splice;
5322 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5325 if (strEQ(d,"srand")) return -KEY_srand;
5328 if (strEQ(d,"stat")) return -KEY_stat;
5329 if (strEQ(d,"study")) return KEY_study;
5332 if (strEQ(d,"substr")) return -KEY_substr;
5333 if (strEQ(d,"sub")) return KEY_sub;
5338 if (strEQ(d,"system")) return -KEY_system;
5341 if (strEQ(d,"symlink")) return -KEY_symlink;
5342 if (strEQ(d,"syscall")) return -KEY_syscall;
5343 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5344 if (strEQ(d,"sysread")) return -KEY_sysread;
5345 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5348 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5357 if (strEQ(d,"tr")) return KEY_tr;
5360 if (strEQ(d,"tie")) return KEY_tie;
5363 if (strEQ(d,"tell")) return -KEY_tell;
5364 if (strEQ(d,"tied")) return KEY_tied;
5365 if (strEQ(d,"time")) return -KEY_time;
5368 if (strEQ(d,"times")) return -KEY_times;
5371 if (strEQ(d,"telldir")) return -KEY_telldir;
5374 if (strEQ(d,"truncate")) return -KEY_truncate;
5381 if (strEQ(d,"uc")) return -KEY_uc;
5384 if (strEQ(d,"use")) return KEY_use;
5387 if (strEQ(d,"undef")) return KEY_undef;
5388 if (strEQ(d,"until")) return KEY_until;
5389 if (strEQ(d,"untie")) return KEY_untie;
5390 if (strEQ(d,"utime")) return -KEY_utime;
5391 if (strEQ(d,"umask")) return -KEY_umask;
5394 if (strEQ(d,"unless")) return KEY_unless;
5395 if (strEQ(d,"unpack")) return -KEY_unpack;
5396 if (strEQ(d,"unlink")) return -KEY_unlink;
5399 if (strEQ(d,"unshift")) return KEY_unshift;
5400 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5405 if (strEQ(d,"values")) return -KEY_values;
5406 if (strEQ(d,"vec")) return -KEY_vec;
5411 if (strEQ(d,"warn")) return -KEY_warn;
5412 if (strEQ(d,"wait")) return -KEY_wait;
5415 if (strEQ(d,"while")) return KEY_while;
5416 if (strEQ(d,"write")) return -KEY_write;
5419 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5422 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5427 if (len == 1) return -KEY_x;
5428 if (strEQ(d,"xor")) return -KEY_xor;
5431 if (len == 1) return KEY_y;
5440 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5444 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5445 dTHR; /* only for ckWARN */
5446 if (ckWARN(WARN_SYNTAX)) {
5448 for (w = s+2; *w && level; w++) {
5455 for (; *w && isSPACE(*w); w++) ;
5456 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5457 Perl_warner(aTHX_ WARN_SYNTAX,
5458 "%s (...) interpreted as function",name);
5461 while (s < PL_bufend && isSPACE(*s))
5465 while (s < PL_bufend && isSPACE(*s))
5467 if (isIDFIRST_lazy(s)) {
5469 while (isALNUM_lazy(s))
5471 while (s < PL_bufend && isSPACE(*s))
5476 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5480 Perl_croak(aTHX_ "No comma allowed after %s", what);
5485 /* Either returns sv, or mortalizes sv and returns a new SV*.
5486 Best used as sv=new_constant(..., sv, ...).
5487 If s, pv are NULL, calls subroutine with one argument,
5488 and type is used with error messages only. */
5491 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5495 HV *table = GvHV(PL_hintgv); /* ^H */
5499 const char *why, *why1, *why2;
5501 if (!(PL_hints & HINT_LOCALIZE_HH)) {
5504 why = "%^H is not localized";
5508 msg = Perl_newSVpvf(aTHX_ "constant(%s): %s%s%s",
5509 (type ? type: "undef"), why1, why2, why);
5510 yyerror(SvPVX(msg));
5515 why = "%^H is not defined";
5518 cvp = hv_fetch(table, key, strlen(key), FALSE);
5519 if (!cvp || !SvOK(*cvp)) {
5520 why = "} is not defined";
5525 sv_2mortal(sv); /* Parent created it permanently */
5528 pv = sv_2mortal(newSVpvn(s, len));
5530 typesv = sv_2mortal(newSVpv(type, 0));
5532 typesv = &PL_sv_undef;
5534 PUSHSTACKi(PERLSI_OVERLOAD);
5547 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5551 /* Check the eval first */
5552 if (!PL_in_eval && SvTRUE(ERRSV))
5555 sv_catpv(ERRSV, "Propagated");
5556 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5558 res = SvREFCNT_inc(sv);
5562 (void)SvREFCNT_inc(res);
5571 why = "}} did not return a defined value";
5572 why1 = "Call to &{$^H{";
5582 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5584 register char *d = dest;
5585 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5588 Perl_croak(aTHX_ ident_too_long);
5589 if (isALNUM(*s)) /* UTF handled below */
5591 else if (*s == '\'' && allow_package && isIDFIRST_lazy(s+1)) {
5596 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5600 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5601 char *t = s + UTF8SKIP(s);
5602 while (*t & 0x80 && is_utf8_mark((U8*)t))
5604 if (d + (t - s) > e)
5605 Perl_croak(aTHX_ ident_too_long);
5606 Copy(s, d, t - s, char);
5619 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
5629 e = d + destlen - 3; /* two-character token, ending NUL */
5631 while (isDIGIT(*s)) {
5633 Perl_croak(aTHX_ ident_too_long);
5640 Perl_croak(aTHX_ ident_too_long);
5641 if (isALNUM(*s)) /* UTF handled below */
5643 else if (*s == '\'' && isIDFIRST_lazy(s+1)) {
5648 else if (*s == ':' && s[1] == ':') {
5652 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5653 char *t = s + UTF8SKIP(s);
5654 while (*t & 0x80 && is_utf8_mark((U8*)t))
5656 if (d + (t - s) > e)
5657 Perl_croak(aTHX_ ident_too_long);
5658 Copy(s, d, t - s, char);
5669 if (PL_lex_state != LEX_NORMAL)
5670 PL_lex_state = LEX_INTERPENDMAYBE;
5673 if (*s == '$' && s[1] &&
5674 (isALNUM_lazy(s+1) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5687 if (*d == '^' && *s && isCONTROLVAR(*s)) {
5692 if (isSPACE(s[-1])) {
5695 if (ch != ' ' && ch != '\t') {
5701 if (isIDFIRST_lazy(d)) {
5705 while (e < send && isALNUM_lazy(e) || *e == ':') {
5707 while (e < send && *e & 0x80 && is_utf8_mark((U8*)e))
5710 Copy(s, d, e - s, char);
5715 while ((isALNUM(*s) || *s == ':') && d < e)
5718 Perl_croak(aTHX_ ident_too_long);
5721 while (s < send && (*s == ' ' || *s == '\t')) s++;
5722 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
5723 dTHR; /* only for ckWARN */
5724 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
5725 const char *brack = *s == '[' ? "[...]" : "{...}";
5726 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5727 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
5728 funny, dest, brack, funny, dest, brack);
5731 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
5735 /* Handle extended ${^Foo} variables
5736 * 1999-02-27 mjd-perl-patch@plover.com */
5737 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
5741 while (isALNUM(*s) && d < e) {
5745 Perl_croak(aTHX_ ident_too_long);
5750 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
5751 PL_lex_state = LEX_INTERPEND;
5754 if (PL_lex_state == LEX_NORMAL) {
5755 dTHR; /* only for ckWARN */
5756 if (ckWARN(WARN_AMBIGUOUS) &&
5757 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
5759 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5760 "Ambiguous use of %c{%s} resolved to %c%s",
5761 funny, dest, funny, dest);
5766 s = bracket; /* let the parser handle it */
5770 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
5771 PL_lex_state = LEX_INTERPEND;
5776 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
5781 *pmfl |= PMf_GLOBAL;
5783 *pmfl |= PMf_CONTINUE;
5787 *pmfl |= PMf_MULTILINE;
5789 *pmfl |= PMf_SINGLELINE;
5791 *pmfl |= PMf_EXTENDED;
5795 S_scan_pat(pTHX_ char *start, I32 type)
5800 s = scan_str(start,FALSE,FALSE);
5803 SvREFCNT_dec(PL_lex_stuff);
5804 PL_lex_stuff = Nullsv;
5805 Perl_croak(aTHX_ "Search pattern not terminated");
5808 pm = (PMOP*)newPMOP(type, 0);
5809 if (PL_multi_open == '?')
5810 pm->op_pmflags |= PMf_ONCE;
5812 while (*s && strchr("iomsx", *s))
5813 pmflag(&pm->op_pmflags,*s++);
5816 while (*s && strchr("iogcmsx", *s))
5817 pmflag(&pm->op_pmflags,*s++);
5819 pm->op_pmpermflags = pm->op_pmflags;
5821 PL_lex_op = (OP*)pm;
5822 yylval.ival = OP_MATCH;
5827 S_scan_subst(pTHX_ char *start)
5834 yylval.ival = OP_NULL;
5836 s = scan_str(start,FALSE,FALSE);
5840 SvREFCNT_dec(PL_lex_stuff);
5841 PL_lex_stuff = Nullsv;
5842 Perl_croak(aTHX_ "Substitution pattern not terminated");
5845 if (s[-1] == PL_multi_open)
5848 first_start = PL_multi_start;
5849 s = scan_str(s,FALSE,FALSE);
5852 SvREFCNT_dec(PL_lex_stuff);
5853 PL_lex_stuff = Nullsv;
5855 SvREFCNT_dec(PL_lex_repl);
5856 PL_lex_repl = Nullsv;
5857 Perl_croak(aTHX_ "Substitution replacement not terminated");
5859 PL_multi_start = first_start; /* so whole substitution is taken together */
5861 pm = (PMOP*)newPMOP(OP_SUBST, 0);
5867 else if (strchr("iogcmsx", *s))
5868 pmflag(&pm->op_pmflags,*s++);
5875 PL_sublex_info.super_bufptr = s;
5876 PL_sublex_info.super_bufend = PL_bufend;
5878 pm->op_pmflags |= PMf_EVAL;
5879 repl = newSVpvn("",0);
5881 sv_catpv(repl, es ? "eval " : "do ");
5882 sv_catpvn(repl, "{ ", 2);
5883 sv_catsv(repl, PL_lex_repl);
5884 sv_catpvn(repl, " };", 2);
5886 SvREFCNT_dec(PL_lex_repl);
5890 pm->op_pmpermflags = pm->op_pmflags;
5891 PL_lex_op = (OP*)pm;
5892 yylval.ival = OP_SUBST;
5897 S_scan_trans(pTHX_ char *start)
5908 yylval.ival = OP_NULL;
5910 s = scan_str(start,FALSE,FALSE);
5913 SvREFCNT_dec(PL_lex_stuff);
5914 PL_lex_stuff = Nullsv;
5915 Perl_croak(aTHX_ "Transliteration pattern not terminated");
5917 if (s[-1] == PL_multi_open)
5920 s = scan_str(s,FALSE,FALSE);
5923 SvREFCNT_dec(PL_lex_stuff);
5924 PL_lex_stuff = Nullsv;
5926 SvREFCNT_dec(PL_lex_repl);
5927 PL_lex_repl = Nullsv;
5928 Perl_croak(aTHX_ "Transliteration replacement not terminated");
5932 o = newSVOP(OP_TRANS, 0, 0);
5933 utf8 = OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF;
5936 New(803,tbl,256,short);
5937 o = newPVOP(OP_TRANS, 0, (char*)tbl);
5941 complement = del = squash = 0;
5942 while (strchr("cdsCU", *s)) {
5944 complement = OPpTRANS_COMPLEMENT;
5946 del = OPpTRANS_DELETE;
5948 squash = OPpTRANS_SQUASH;
5953 utf8 &= ~OPpTRANS_FROM_UTF;
5955 utf8 |= OPpTRANS_FROM_UTF;
5959 utf8 &= ~OPpTRANS_TO_UTF;
5961 utf8 |= OPpTRANS_TO_UTF;
5964 Perl_croak(aTHX_ "Too many /C and /U options");
5969 o->op_private = del|squash|complement|utf8;
5972 yylval.ival = OP_TRANS;
5977 S_scan_heredoc(pTHX_ register char *s)
5981 I32 op_type = OP_SCALAR;
5988 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
5992 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
5995 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
5996 if (*peek && strchr("`'\"",*peek)) {
5999 s = delimcpy(d, e, s, PL_bufend, term, &len);
6009 if (!isALNUM_lazy(s))
6010 deprecate("bare << to mean <<\"\"");
6011 for (; isALNUM_lazy(s); s++) {
6016 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6017 Perl_croak(aTHX_ "Delimiter for here document is too long");
6020 len = d - PL_tokenbuf;
6021 #ifndef PERL_STRICT_CR
6022 d = strchr(s, '\r');
6026 while (s < PL_bufend) {
6032 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6041 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6046 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6047 herewas = newSVpvn(s,PL_bufend-s);
6049 s--, herewas = newSVpvn(s,d-s);
6050 s += SvCUR(herewas);
6052 tmpstr = NEWSV(87,79);
6053 sv_upgrade(tmpstr, SVt_PVIV);
6058 else if (term == '`') {
6059 op_type = OP_BACKTICK;
6060 SvIVX(tmpstr) = '\\';
6064 PL_multi_start = CopLINE(PL_curcop);
6065 PL_multi_open = PL_multi_close = '<';
6066 term = *PL_tokenbuf;
6067 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6068 char *bufptr = PL_sublex_info.super_bufptr;
6069 char *bufend = PL_sublex_info.super_bufend;
6070 char *olds = s - SvCUR(herewas);
6071 s = strchr(bufptr, '\n');
6075 while (s < bufend &&
6076 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6078 CopLINE_inc(PL_curcop);
6081 CopLINE_set(PL_curcop, PL_multi_start);
6082 missingterm(PL_tokenbuf);
6084 sv_setpvn(herewas,bufptr,d-bufptr+1);
6085 sv_setpvn(tmpstr,d+1,s-d);
6087 sv_catpvn(herewas,s,bufend-s);
6088 (void)strcpy(bufptr,SvPVX(herewas));
6095 while (s < PL_bufend &&
6096 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6098 CopLINE_inc(PL_curcop);
6100 if (s >= PL_bufend) {
6101 CopLINE_set(PL_curcop, PL_multi_start);
6102 missingterm(PL_tokenbuf);
6104 sv_setpvn(tmpstr,d+1,s-d);
6106 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6108 sv_catpvn(herewas,s,PL_bufend-s);
6109 sv_setsv(PL_linestr,herewas);
6110 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6111 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6114 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6115 while (s >= PL_bufend) { /* multiple line string? */
6117 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6118 CopLINE_set(PL_curcop, PL_multi_start);
6119 missingterm(PL_tokenbuf);
6121 CopLINE_inc(PL_curcop);
6122 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6123 #ifndef PERL_STRICT_CR
6124 if (PL_bufend - PL_linestart >= 2) {
6125 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6126 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6128 PL_bufend[-2] = '\n';
6130 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6132 else if (PL_bufend[-1] == '\r')
6133 PL_bufend[-1] = '\n';
6135 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6136 PL_bufend[-1] = '\n';
6138 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6139 SV *sv = NEWSV(88,0);
6141 sv_upgrade(sv, SVt_PVMG);
6142 sv_setsv(sv,PL_linestr);
6143 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6145 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6148 sv_catsv(PL_linestr,herewas);
6149 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6153 sv_catsv(tmpstr,PL_linestr);
6158 PL_multi_end = CopLINE(PL_curcop);
6159 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6160 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6161 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6163 SvREFCNT_dec(herewas);
6164 PL_lex_stuff = tmpstr;
6165 yylval.ival = op_type;
6170 takes: current position in input buffer
6171 returns: new position in input buffer
6172 side-effects: yylval and lex_op are set.
6177 <FH> read from filehandle
6178 <pkg::FH> read from package qualified filehandle
6179 <pkg'FH> read from package qualified filehandle
6180 <$fh> read from filehandle in $fh
6186 S_scan_inputsymbol(pTHX_ char *start)
6188 register char *s = start; /* current position in buffer */
6194 d = PL_tokenbuf; /* start of temp holding space */
6195 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6196 end = strchr(s, '\n');
6199 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6201 /* die if we didn't have space for the contents of the <>,
6202 or if it didn't end, or if we see a newline
6205 if (len >= sizeof PL_tokenbuf)
6206 Perl_croak(aTHX_ "Excessively long <> operator");
6208 Perl_croak(aTHX_ "Unterminated <> operator");
6213 Remember, only scalar variables are interpreted as filehandles by
6214 this code. Anything more complex (e.g., <$fh{$num}>) will be
6215 treated as a glob() call.
6216 This code makes use of the fact that except for the $ at the front,
6217 a scalar variable and a filehandle look the same.
6219 if (*d == '$' && d[1]) d++;
6221 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6222 while (*d && (isALNUM_lazy(d) || *d == '\'' || *d == ':'))
6225 /* If we've tried to read what we allow filehandles to look like, and
6226 there's still text left, then it must be a glob() and not a getline.
6227 Use scan_str to pull out the stuff between the <> and treat it
6228 as nothing more than a string.
6231 if (d - PL_tokenbuf != len) {
6232 yylval.ival = OP_GLOB;
6234 s = scan_str(start,FALSE,FALSE);
6236 Perl_croak(aTHX_ "Glob not terminated");
6240 /* we're in a filehandle read situation */
6243 /* turn <> into <ARGV> */
6245 (void)strcpy(d,"ARGV");
6247 /* if <$fh>, create the ops to turn the variable into a
6253 /* try to find it in the pad for this block, otherwise find
6254 add symbol table ops
6256 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6257 OP *o = newOP(OP_PADSV, 0);
6259 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6262 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6263 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6264 newUNOP(OP_RV2SV, 0,
6265 newGVOP(OP_GV, 0, gv)));
6267 PL_lex_op->op_flags |= OPf_SPECIAL;
6268 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6269 yylval.ival = OP_NULL;
6272 /* If it's none of the above, it must be a literal filehandle
6273 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6275 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6276 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6277 yylval.ival = OP_NULL;
6286 takes: start position in buffer
6287 keep_quoted preserve \ on the embedded delimiter(s)
6288 keep_delims preserve the delimiters around the string
6289 returns: position to continue reading from buffer
6290 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6291 updates the read buffer.
6293 This subroutine pulls a string out of the input. It is called for:
6294 q single quotes q(literal text)
6295 ' single quotes 'literal text'
6296 qq double quotes qq(interpolate $here please)
6297 " double quotes "interpolate $here please"
6298 qx backticks qx(/bin/ls -l)
6299 ` backticks `/bin/ls -l`
6300 qw quote words @EXPORT_OK = qw( func() $spam )
6301 m// regexp match m/this/
6302 s/// regexp substitute s/this/that/
6303 tr/// string transliterate tr/this/that/
6304 y/// string transliterate y/this/that/
6305 ($*@) sub prototypes sub foo ($)
6306 (stuff) sub attr parameters sub foo : attr(stuff)
6307 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6309 In most of these cases (all but <>, patterns and transliterate)
6310 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6311 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6312 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6315 It skips whitespace before the string starts, and treats the first
6316 character as the delimiter. If the delimiter is one of ([{< then
6317 the corresponding "close" character )]}> is used as the closing
6318 delimiter. It allows quoting of delimiters, and if the string has
6319 balanced delimiters ([{<>}]) it allows nesting.
6321 The lexer always reads these strings into lex_stuff, except in the
6322 case of the operators which take *two* arguments (s/// and tr///)
6323 when it checks to see if lex_stuff is full (presumably with the 1st
6324 arg to s or tr) and if so puts the string into lex_repl.
6329 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6332 SV *sv; /* scalar value: string */
6333 char *tmps; /* temp string, used for delimiter matching */
6334 register char *s = start; /* current position in the buffer */
6335 register char term; /* terminating character */
6336 register char *to; /* current position in the sv's data */
6337 I32 brackets = 1; /* bracket nesting level */
6339 /* skip space before the delimiter */
6343 /* mark where we are, in case we need to report errors */
6346 /* after skipping whitespace, the next character is the terminator */
6348 /* mark where we are */
6349 PL_multi_start = CopLINE(PL_curcop);
6350 PL_multi_open = term;
6352 /* find corresponding closing delimiter */
6353 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6355 PL_multi_close = term;
6357 /* create a new SV to hold the contents. 87 is leak category, I'm
6358 assuming. 79 is the SV's initial length. What a random number. */
6360 sv_upgrade(sv, SVt_PVIV);
6362 (void)SvPOK_only(sv); /* validate pointer */
6364 /* move past delimiter and try to read a complete string */
6366 sv_catpvn(sv, s, 1);
6369 /* extend sv if need be */
6370 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6371 /* set 'to' to the next character in the sv's string */
6372 to = SvPVX(sv)+SvCUR(sv);
6374 /* if open delimiter is the close delimiter read unbridle */
6375 if (PL_multi_open == PL_multi_close) {
6376 for (; s < PL_bufend; s++,to++) {
6377 /* embedded newlines increment the current line number */
6378 if (*s == '\n' && !PL_rsfp)
6379 CopLINE_inc(PL_curcop);
6380 /* handle quoted delimiters */
6381 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6382 if (!keep_quoted && s[1] == term)
6384 /* any other quotes are simply copied straight through */
6388 /* terminate when run out of buffer (the for() condition), or
6389 have found the terminator */
6390 else if (*s == term)
6396 /* if the terminator isn't the same as the start character (e.g.,
6397 matched brackets), we have to allow more in the quoting, and
6398 be prepared for nested brackets.
6401 /* read until we run out of string, or we find the terminator */
6402 for (; s < PL_bufend; s++,to++) {
6403 /* embedded newlines increment the line count */
6404 if (*s == '\n' && !PL_rsfp)
6405 CopLINE_inc(PL_curcop);
6406 /* backslashes can escape the open or closing characters */
6407 if (*s == '\\' && s+1 < PL_bufend) {
6409 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6414 /* allow nested opens and closes */
6415 else if (*s == PL_multi_close && --brackets <= 0)
6417 else if (*s == PL_multi_open)
6422 /* terminate the copied string and update the sv's end-of-string */
6424 SvCUR_set(sv, to - SvPVX(sv));
6427 * this next chunk reads more into the buffer if we're not done yet
6430 if (s < PL_bufend) break; /* handle case where we are done yet :-) */
6432 #ifndef PERL_STRICT_CR
6433 if (to - SvPVX(sv) >= 2) {
6434 if ((to[-2] == '\r' && to[-1] == '\n') ||
6435 (to[-2] == '\n' && to[-1] == '\r'))
6439 SvCUR_set(sv, to - SvPVX(sv));
6441 else if (to[-1] == '\r')
6444 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6448 /* if we're out of file, or a read fails, bail and reset the current
6449 line marker so we can report where the unterminated string began
6452 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6454 CopLINE_set(PL_curcop, PL_multi_start);
6457 /* we read a line, so increment our line counter */
6458 CopLINE_inc(PL_curcop);
6460 /* update debugger info */
6461 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6462 SV *sv = NEWSV(88,0);
6464 sv_upgrade(sv, SVt_PVMG);
6465 sv_setsv(sv,PL_linestr);
6466 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6469 /* having changed the buffer, we must update PL_bufend */
6470 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6473 /* at this point, we have successfully read the delimited string */
6476 sv_catpvn(sv, s, 1);
6477 PL_multi_end = CopLINE(PL_curcop);
6480 /* if we allocated too much space, give some back */
6481 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6482 SvLEN_set(sv, SvCUR(sv) + 1);
6483 Renew(SvPVX(sv), SvLEN(sv), char);
6486 /* decide whether this is the first or second quoted string we've read
6499 takes: pointer to position in buffer
6500 returns: pointer to new position in buffer
6501 side-effects: builds ops for the constant in yylval.op
6503 Read a number in any of the formats that Perl accepts:
6505 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6506 [\d_]+(\.[\d_]*)?[Ee](\d+)
6508 Underbars (_) are allowed in decimal numbers. If -w is on,
6509 underbars before a decimal point must be at three digit intervals.
6511 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6514 If it reads a number without a decimal point or an exponent, it will
6515 try converting the number to an integer and see if it can do so
6516 without loss of precision.
6520 Perl_scan_num(pTHX_ char *start)
6522 register char *s = start; /* current position in buffer */
6523 register char *d; /* destination in temp buffer */
6524 register char *e; /* end of temp buffer */
6525 IV tryiv; /* used to see if it can be an IV */
6526 NV value; /* number read, as a double */
6527 SV *sv = Nullsv; /* place to put the converted number */
6528 bool floatit; /* boolean: int or float? */
6529 char *lastub = 0; /* position of last underbar */
6530 static char number_too_long[] = "Number too long";
6532 /* We use the first character to decide what type of number this is */
6536 Perl_croak(aTHX_ "panic: scan_num");
6538 /* if it starts with a 0, it could be an octal number, a decimal in
6539 0.13 disguise, or a hexadecimal number, or a binary number. */
6543 u holds the "number so far"
6544 shift the power of 2 of the base
6545 (hex == 4, octal == 3, binary == 1)
6546 overflowed was the number more than we can hold?
6548 Shift is used when we add a digit. It also serves as an "are
6549 we in octal/hex/binary?" indicator to disallow hex characters
6556 bool overflowed = FALSE;
6557 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6558 static char* bases[5] = { "", "binary", "", "octal",
6560 static char* Bases[5] = { "", "Binary", "", "Octal",
6562 static char *maxima[5] = { "",
6563 "0b11111111111111111111111111111111",
6567 char *base, *Base, *max;
6573 } else if (s[1] == 'b') {
6577 /* check for a decimal in disguise */
6578 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6580 /* so it must be octal */
6584 base = bases[shift];
6585 Base = Bases[shift];
6586 max = maxima[shift];
6588 /* read the rest of the number */
6590 /* x is used in the overflow test,
6591 b is the digit we're adding on. */
6596 /* if we don't mention it, we're done */
6605 /* 8 and 9 are not octal */
6608 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6612 case '2': case '3': case '4':
6613 case '5': case '6': case '7':
6615 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6619 b = *s++ & 15; /* ASCII digit -> value of digit */
6623 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6624 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6625 /* make sure they said 0x */
6630 /* Prepare to put the digit we have onto the end
6631 of the number so far. We check for overflows.
6636 x = u << shift; /* make room for the digit */
6638 if ((x >> shift) != u
6639 && !(PL_hints & HINT_NEW_BINARY)) {
6643 if (ckWARN_d(WARN_OVERFLOW))
6644 Perl_warner(aTHX_ WARN_OVERFLOW,
6645 "Integer overflow in %s number",
6648 u = x | b; /* add the digit to the end */
6651 n *= nvshift[shift];
6652 /* If an NV has not enough bits in its
6653 * mantissa to represent an UV this summing of
6654 * small low-order numbers is a waste of time
6655 * (because the NV cannot preserve the
6656 * low-order bits anyway): we could just
6657 * remember when did we overflow and in the
6658 * end just multiply n by the right
6666 /* if we get here, we had success: make a scalar value from
6673 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
6674 Perl_warner(aTHX_ WARN_PORTABLE,
6675 "%s number > %s non-portable",
6682 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
6683 Perl_warner(aTHX_ WARN_PORTABLE,
6684 "%s number > %s non-portable",
6689 if (PL_hints & HINT_NEW_BINARY)
6690 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
6695 handle decimal numbers.
6696 we're also sent here when we read a 0 as the first digit
6698 case '1': case '2': case '3': case '4': case '5':
6699 case '6': case '7': case '8': case '9': case '.':
6702 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
6705 /* read next group of digits and _ and copy into d */
6706 while (isDIGIT(*s) || *s == '_') {
6707 /* skip underscores, checking for misplaced ones
6711 dTHR; /* only for ckWARN */
6712 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
6713 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6717 /* check for end of fixed-length buffer */
6719 Perl_croak(aTHX_ number_too_long);
6720 /* if we're ok, copy the character */
6725 /* final misplaced underbar check */
6726 if (lastub && s - lastub != 3) {
6728 if (ckWARN(WARN_SYNTAX))
6729 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6732 /* read a decimal portion if there is one. avoid
6733 3..5 being interpreted as the number 3. followed
6736 if (*s == '.' && s[1] != '.') {
6740 /* copy, ignoring underbars, until we run out of
6741 digits. Note: no misplaced underbar checks!
6743 for (; isDIGIT(*s) || *s == '_'; s++) {
6744 /* fixed length buffer check */
6746 Perl_croak(aTHX_ number_too_long);
6752 /* read exponent part, if present */
6753 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
6757 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
6758 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
6760 /* allow positive or negative exponent */
6761 if (*s == '+' || *s == '-')
6764 /* read digits of exponent (no underbars :-) */
6765 while (isDIGIT(*s)) {
6767 Perl_croak(aTHX_ number_too_long);
6772 /* terminate the string */
6775 /* make an sv from the string */
6778 value = Atof(PL_tokenbuf);
6781 See if we can make do with an integer value without loss of
6782 precision. We use I_V to cast to an int, because some
6783 compilers have issues. Then we try casting it back and see
6784 if it was the same. We only do this if we know we
6785 specifically read an integer.
6787 Note: if floatit is true, then we don't need to do the
6791 if (!floatit && (NV)tryiv == value)
6792 sv_setiv(sv, tryiv);
6794 sv_setnv(sv, value);
6795 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
6796 (PL_hints & HINT_NEW_INTEGER) )
6797 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
6798 (floatit ? "float" : "integer"),
6801 /* if it starts with a v, it could be a version number */
6806 while (isDIGIT(*pos))
6808 if (*pos == '.' && isDIGIT(pos[1])) {
6813 s++; /* get past 'v' */
6816 SvUPGRADE(sv, SVt_PVNV);
6817 sv_setpvn(sv, "", 0);
6822 while (isDIGIT(*pos))
6825 tmpend = uv_to_utf8(tmpbuf, rev);
6827 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
6829 SvNVX(sv) += (NV)rev/nshift;
6831 } while (*pos == '.' && isDIGIT(pos[1]));
6835 tmpend = uv_to_utf8(tmpbuf, rev);
6837 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
6839 SvNVX(sv) += (NV)rev/nshift;
6850 /* make the op for the constant and return */
6853 yylval.opval = newSVOP(OP_CONST, 0, sv);
6855 yylval.opval = Nullop;
6861 S_scan_formline(pTHX_ register char *s)
6866 SV *stuff = newSVpvn("",0);
6867 bool needargs = FALSE;
6870 if (*s == '.' || *s == '}') {
6872 #ifdef PERL_STRICT_CR
6873 for (t = s+1;*t == ' ' || *t == '\t'; t++) ;
6875 for (t = s+1;*t == ' ' || *t == '\t' || *t == '\r'; t++) ;
6877 if (*t == '\n' || t == PL_bufend)
6880 if (PL_in_eval && !PL_rsfp) {
6881 eol = strchr(s,'\n');
6886 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6888 for (t = s; t < eol; t++) {
6889 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
6891 goto enough; /* ~~ must be first line in formline */
6893 if (*t == '@' || *t == '^')
6896 sv_catpvn(stuff, s, eol-s);
6900 s = filter_gets(PL_linestr, PL_rsfp, 0);
6901 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
6902 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
6905 yyerror("Format not terminated");
6915 PL_lex_state = LEX_NORMAL;
6916 PL_nextval[PL_nexttoke].ival = 0;
6920 PL_lex_state = LEX_FORMLINE;
6921 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
6923 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
6927 SvREFCNT_dec(stuff);
6928 PL_lex_formbrack = 0;
6939 PL_cshlen = strlen(PL_cshname);
6944 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
6947 I32 oldsavestack_ix = PL_savestack_ix;
6948 CV* outsidecv = PL_compcv;
6952 assert(SvTYPE(PL_compcv) == SVt_PVCV);
6954 SAVEI32(PL_subline);
6955 save_item(PL_subname);
6957 SAVEVPTR(PL_curpad);
6958 SAVESPTR(PL_comppad);
6959 SAVESPTR(PL_comppad_name);
6960 SAVESPTR(PL_compcv);
6961 SAVEI32(PL_comppad_name_fill);
6962 SAVEI32(PL_min_intro_pending);
6963 SAVEI32(PL_max_intro_pending);
6964 SAVEI32(PL_pad_reset_pending);
6966 PL_compcv = (CV*)NEWSV(1104,0);
6967 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
6968 CvFLAGS(PL_compcv) |= flags;
6970 PL_comppad = newAV();
6971 av_push(PL_comppad, Nullsv);
6972 PL_curpad = AvARRAY(PL_comppad);
6973 PL_comppad_name = newAV();
6974 PL_comppad_name_fill = 0;
6975 PL_min_intro_pending = 0;
6977 PL_subline = CopLINE(PL_curcop);
6979 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
6980 PL_curpad[0] = (SV*)newAV();
6981 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
6982 #endif /* USE_THREADS */
6984 comppadlist = newAV();
6985 AvREAL_off(comppadlist);
6986 av_store(comppadlist, 0, (SV*)PL_comppad_name);
6987 av_store(comppadlist, 1, (SV*)PL_comppad);
6989 CvPADLIST(PL_compcv) = comppadlist;
6990 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
6992 CvOWNER(PL_compcv) = 0;
6993 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
6994 MUTEX_INIT(CvMUTEXP(PL_compcv));
6995 #endif /* USE_THREADS */
6997 return oldsavestack_ix;
7001 Perl_yywarn(pTHX_ char *s)
7004 PL_in_eval |= EVAL_WARNONLY;
7006 PL_in_eval &= ~EVAL_WARNONLY;
7011 Perl_yyerror(pTHX_ char *s)
7015 char *context = NULL;
7019 if (!yychar || (yychar == ';' && !PL_rsfp))
7021 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7022 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7023 while (isSPACE(*PL_oldoldbufptr))
7025 context = PL_oldoldbufptr;
7026 contlen = PL_bufptr - PL_oldoldbufptr;
7028 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7029 PL_oldbufptr != PL_bufptr) {
7030 while (isSPACE(*PL_oldbufptr))
7032 context = PL_oldbufptr;
7033 contlen = PL_bufptr - PL_oldbufptr;
7035 else if (yychar > 255)
7036 where = "next token ???";
7037 else if ((yychar & 127) == 127) {
7038 if (PL_lex_state == LEX_NORMAL ||
7039 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7040 where = "at end of line";
7041 else if (PL_lex_inpat)
7042 where = "within pattern";
7044 where = "within string";
7047 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7049 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7050 else if (isPRINT_LC(yychar))
7051 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7053 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7054 where = SvPVX(where_sv);
7056 msg = sv_2mortal(newSVpv(s, 0));
7057 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7058 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7060 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7062 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7063 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7064 Perl_sv_catpvf(aTHX_ msg,
7065 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7066 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7069 if (PL_in_eval & EVAL_WARNONLY)
7070 Perl_warn(aTHX_ "%_", msg);
7073 if (PL_error_count >= 10)
7074 Perl_croak(aTHX_ "%s has too many errors.\n", CopFILE(PL_curcop));
7076 PL_in_my_stash = Nullhv;
7087 * Restore a source filter.
7091 restore_rsfp(pTHXo_ void *f)
7093 PerlIO *fp = (PerlIO*)f;
7095 if (PL_rsfp == PerlIO_stdin())
7096 PerlIO_clearerr(PL_rsfp);
7097 else if (PL_rsfp && (PL_rsfp != fp))
7098 PerlIO_close(PL_rsfp);