3 * Copyright (c) 1991-2001, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
15 * This file is the lexer for Perl. It's closely linked to the
18 * The main routine is yylex(), which returns the next token.
22 #define PERL_IN_TOKE_C
25 #define yychar PL_yychar
26 #define yylval PL_yylval
28 static char ident_too_long[] = "Identifier too long";
30 static void restore_rsfp(pTHXo_ void *f);
31 #ifndef PERL_NO_UTF16_FILTER
32 static I32 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
33 static I32 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
36 #define XFAKEBRACK 128
39 /*#define UTF (SvUTF8(PL_linestr) && !(PL_hints & HINT_BYTE))*/
40 #define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || PL_hints & HINT_UTF8)
42 /* In variables name $^X, these are the legal values for X.
43 * 1999-02-27 mjd-perl-patch@plover.com */
44 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
46 /* On MacOS, respect nonbreaking spaces */
47 #ifdef MACOS_TRADITIONAL
48 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
50 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
53 /* LEX_* are values for PL_lex_state, the state of the lexer.
54 * They are arranged oddly so that the guard on the switch statement
55 * can get by with a single comparison (if the compiler is smart enough).
58 /* #define LEX_NOTPARSING 11 is done in perl.h. */
61 #define LEX_INTERPNORMAL 9
62 #define LEX_INTERPCASEMOD 8
63 #define LEX_INTERPPUSH 7
64 #define LEX_INTERPSTART 6
65 #define LEX_INTERPEND 5
66 #define LEX_INTERPENDMAYBE 4
67 #define LEX_INTERPCONCAT 3
68 #define LEX_INTERPCONST 2
69 #define LEX_FORMLINE 1
70 #define LEX_KNOWNEXT 0
78 # define YYMAXLEVEL 100
80 YYSTYPE* yylval_pointer[YYMAXLEVEL];
81 int* yychar_pointer[YYMAXLEVEL];
85 # define yylval (*yylval_pointer[yyactlevel])
86 # define yychar (*yychar_pointer[yyactlevel])
87 # define PERL_YYLEX_PARAM yylval_pointer[yyactlevel],yychar_pointer[yyactlevel]
89 # define yylex() Perl_yylex_r(aTHX_ yylval_pointer[yyactlevel],yychar_pointer[yyactlevel])
94 /* CLINE is a macro that ensures PL_copline has a sane value */
99 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
102 * Convenience functions to return different tokens and prime the
103 * lexer for the next token. They all take an argument.
105 * TOKEN : generic token (used for '(', DOLSHARP, etc)
106 * OPERATOR : generic operator
107 * AOPERATOR : assignment operator
108 * PREBLOCK : beginning the block after an if, while, foreach, ...
109 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
110 * PREREF : *EXPR where EXPR is not a simple identifier
111 * TERM : expression term
112 * LOOPX : loop exiting command (goto, last, dump, etc)
113 * FTST : file test operator
114 * FUN0 : zero-argument function
115 * FUN1 : not used, except for not, which isn't a UNIOP
116 * BOop : bitwise or or xor
118 * SHop : shift operator
119 * PWop : power operator
120 * PMop : pattern-matching operator
121 * Aop : addition-level operator
122 * Mop : multiplication-level operator
123 * Eop : equality-testing operator
124 * Rop : relational operator <= != gt
126 * Also see LOP and lop() below.
129 /* Note that REPORT() and REPORT2() will be expressions that supply
130 * their own trailing comma, not suitable for statements as such. */
131 #ifdef DEBUGGING /* Serve -DT. */
132 # define REPORT(x,retval) tokereport(x,s,(int)retval),
133 # define REPORT2(x,retval) tokereport(x,s, yylval.ival),
135 # define REPORT(x,retval)
136 # define REPORT2(x,retval)
139 #define TOKEN(retval) return (REPORT2("token",retval) PL_bufptr = s,(int)retval)
140 #define OPERATOR(retval) return (REPORT2("operator",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval)
141 #define AOPERATOR(retval) return ao((REPORT2("aop",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval))
142 #define PREBLOCK(retval) return (REPORT2("preblock",retval) PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
143 #define PRETERMBLOCK(retval) return (REPORT2("pretermblock",retval) PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
144 #define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
145 #define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
146 #define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
147 #define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
148 #define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
149 #define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
150 #define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
151 #define BAop(f) return ao((yylval.ival=f, REPORT("bitandop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
152 #define SHop(f) return ao((yylval.ival=f, REPORT("shiftop",f) PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
153 #define PWop(f) return ao((yylval.ival=f, REPORT("powop",f) PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
154 #define PMop(f) return(yylval.ival=f, REPORT("matchop",f) PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
155 #define Aop(f) return ao((yylval.ival=f, REPORT("add",f) PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
156 #define Mop(f) return ao((yylval.ival=f, REPORT("mul",f) PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
157 #define Eop(f) return(yylval.ival=f, REPORT("eq",f) PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
158 #define Rop(f) return(yylval.ival=f, REPORT("rel",f) PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
160 /* This bit of chicanery makes a unary function followed by
161 * a parenthesis into a function with one argument, highest precedence.
163 #define UNI(f) return(yylval.ival = f, \
167 PL_last_uni = PL_oldbufptr, \
168 PL_last_lop_op = f, \
169 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
171 #define UNIBRACK(f) return(yylval.ival = f, \
174 PL_last_uni = PL_oldbufptr, \
175 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
177 /* grandfather return to old style */
178 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
181 S_tokereport(pTHX_ char *thing, char* s, I32 rv)
185 report = newSVpv(thing, 0);
186 Perl_sv_catpvf(aTHX_ report, ":line %i:%i:", CopLINE(PL_curcop), rv);
188 if (s - PL_bufptr > 0)
189 sv_catpvn(report, PL_bufptr, s - PL_bufptr);
191 if (PL_oldbufptr && *PL_oldbufptr)
192 sv_catpv(report, PL_tokenbuf);
194 PerlIO_printf(Perl_debug_log, "### %s\n", SvPV_nolen(report));
201 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
202 * into an OP_ANDASSIGN or OP_ORASSIGN
206 S_ao(pTHX_ int toketype)
208 if (*PL_bufptr == '=') {
210 if (toketype == ANDAND)
211 yylval.ival = OP_ANDASSIGN;
212 else if (toketype == OROR)
213 yylval.ival = OP_ORASSIGN;
221 * When Perl expects an operator and finds something else, no_op
222 * prints the warning. It always prints "<something> found where
223 * operator expected. It prints "Missing semicolon on previous line?"
224 * if the surprise occurs at the start of the line. "do you need to
225 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
226 * where the compiler doesn't know if foo is a method call or a function.
227 * It prints "Missing operator before end of line" if there's nothing
228 * after the missing operator, or "... before <...>" if there is something
229 * after the missing operator.
233 S_no_op(pTHX_ char *what, char *s)
235 char *oldbp = PL_bufptr;
236 bool is_first = (PL_oldbufptr == PL_linestart);
242 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
244 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
245 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
247 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
248 if (t < PL_bufptr && isSPACE(*t))
249 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
250 t - PL_oldoldbufptr, PL_oldoldbufptr);
254 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
261 * Complain about missing quote/regexp/heredoc terminator.
262 * If it's called with (char *)NULL then it cauterizes the line buffer.
263 * If we're in a delimited string and the delimiter is a control
264 * character, it's reformatted into a two-char sequence like ^C.
269 S_missingterm(pTHX_ char *s)
274 char *nl = strrchr(s,'\n');
280 iscntrl(PL_multi_close)
282 PL_multi_close < 32 || PL_multi_close == 127
286 tmpbuf[1] = toCTRL(PL_multi_close);
292 *tmpbuf = PL_multi_close;
296 q = strchr(s,'"') ? '\'' : '"';
297 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
305 Perl_deprecate(pTHX_ char *s)
307 if (ckWARN(WARN_DEPRECATED))
308 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
313 * Deprecate a comma-less variable list.
319 deprecate("comma-less variable list");
323 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
324 * utf16-to-utf8-reversed.
327 #ifdef PERL_CR_FILTER
331 register char *s = SvPVX(sv);
332 register char *e = s + SvCUR(sv);
333 /* outer loop optimized to do nothing if there are no CR-LFs */
335 if (*s++ == '\r' && *s == '\n') {
336 /* hit a CR-LF, need to copy the rest */
337 register char *d = s - 1;
340 if (*s == '\r' && s[1] == '\n')
351 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
353 I32 count = FILTER_READ(idx+1, sv, maxlen);
354 if (count > 0 && !maxlen)
362 * Initialize variables. Uses the Perl save_stack to save its state (for
363 * recursive calls to the parser).
367 Perl_lex_start(pTHX_ SV *line)
372 SAVEI32(PL_lex_dojoin);
373 SAVEI32(PL_lex_brackets);
374 SAVEI32(PL_lex_casemods);
375 SAVEI32(PL_lex_starts);
376 SAVEI32(PL_lex_state);
377 SAVEVPTR(PL_lex_inpat);
378 SAVEI32(PL_lex_inwhat);
379 if (PL_lex_state == LEX_KNOWNEXT) {
380 I32 toke = PL_nexttoke;
381 while (--toke >= 0) {
382 SAVEI32(PL_nexttype[toke]);
383 SAVEVPTR(PL_nextval[toke]);
385 SAVEI32(PL_nexttoke);
387 SAVECOPLINE(PL_curcop);
390 SAVEPPTR(PL_oldbufptr);
391 SAVEPPTR(PL_oldoldbufptr);
392 SAVEPPTR(PL_last_lop);
393 SAVEPPTR(PL_last_uni);
394 SAVEPPTR(PL_linestart);
395 SAVESPTR(PL_linestr);
396 SAVEPPTR(PL_lex_brackstack);
397 SAVEPPTR(PL_lex_casestack);
398 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
399 SAVESPTR(PL_lex_stuff);
400 SAVEI32(PL_lex_defer);
401 SAVEI32(PL_sublex_info.sub_inwhat);
402 SAVESPTR(PL_lex_repl);
404 SAVEINT(PL_lex_expect);
406 PL_lex_state = LEX_NORMAL;
410 New(899, PL_lex_brackstack, 120, char);
411 New(899, PL_lex_casestack, 12, char);
412 SAVEFREEPV(PL_lex_brackstack);
413 SAVEFREEPV(PL_lex_casestack);
415 *PL_lex_casestack = '\0';
418 PL_lex_stuff = Nullsv;
419 PL_lex_repl = Nullsv;
423 PL_sublex_info.sub_inwhat = 0;
425 if (SvREADONLY(PL_linestr))
426 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
427 s = SvPV(PL_linestr, len);
428 if (len && s[len-1] != ';') {
429 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
430 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
431 sv_catpvn(PL_linestr, "\n;", 2);
433 SvTEMP_off(PL_linestr);
434 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
435 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
436 PL_last_lop = PL_last_uni = Nullch;
438 PL_rs = newSVpvn("\n", 1);
444 * Finalizer for lexing operations. Must be called when the parser is
445 * done with the lexer.
451 PL_doextract = FALSE;
456 * This subroutine has nothing to do with tilting, whether at windmills
457 * or pinball tables. Its name is short for "increment line". It
458 * increments the current line number in CopLINE(PL_curcop) and checks
459 * to see whether the line starts with a comment of the form
460 * # line 500 "foo.pm"
461 * If so, it sets the current line number and file to the values in the comment.
465 S_incline(pTHX_ char *s)
472 CopLINE_inc(PL_curcop);
475 while (SPACE_OR_TAB(*s)) s++;
476 if (strnEQ(s, "line", 4))
480 if (SPACE_OR_TAB(*s))
484 while (SPACE_OR_TAB(*s)) s++;
490 while (SPACE_OR_TAB(*s))
492 if (*s == '"' && (t = strchr(s+1, '"'))) {
497 for (t = s; !isSPACE(*t); t++) ;
500 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
502 if (*e != '\n' && *e != '\0')
503 return; /* false alarm */
509 Safefree(CopFILE(PL_curcop));
511 SvREFCNT_dec(CopFILEGV(PL_curcop));
513 CopFILE_set(PL_curcop, s);
516 CopLINE_set(PL_curcop, atoi(n)-1);
521 * Called to gobble the appropriate amount and type of whitespace.
522 * Skips comments as well.
526 S_skipspace(pTHX_ register char *s)
528 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
529 while (s < PL_bufend && SPACE_OR_TAB(*s))
535 SSize_t oldprevlen, oldoldprevlen;
536 SSize_t oldloplen, oldunilen;
537 while (s < PL_bufend && isSPACE(*s)) {
538 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
543 if (s < PL_bufend && *s == '#') {
544 while (s < PL_bufend && *s != '\n')
548 if (PL_in_eval && !PL_rsfp) {
555 /* only continue to recharge the buffer if we're at the end
556 * of the buffer, we're not reading from a source filter, and
557 * we're in normal lexing mode
559 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
560 PL_lex_state == LEX_FORMLINE)
563 /* try to recharge the buffer */
564 if ((s = filter_gets(PL_linestr, PL_rsfp,
565 (prevlen = SvCUR(PL_linestr)))) == Nullch)
567 /* end of file. Add on the -p or -n magic */
568 if (PL_minus_n || PL_minus_p) {
569 sv_setpv(PL_linestr,PL_minus_p ?
570 ";}continue{print or die qq(-p destination: $!\\n)" :
572 sv_catpv(PL_linestr,";}");
573 PL_minus_n = PL_minus_p = 0;
576 sv_setpv(PL_linestr,";");
578 /* reset variables for next time we lex */
579 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
581 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
582 PL_last_lop = PL_last_uni = Nullch;
584 /* Close the filehandle. Could be from -P preprocessor,
585 * STDIN, or a regular file. If we were reading code from
586 * STDIN (because the commandline held no -e or filename)
587 * then we don't close it, we reset it so the code can
588 * read from STDIN too.
591 if (PL_preprocess && !PL_in_eval)
592 (void)PerlProc_pclose(PL_rsfp);
593 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
594 PerlIO_clearerr(PL_rsfp);
596 (void)PerlIO_close(PL_rsfp);
601 /* not at end of file, so we only read another line */
602 /* make corresponding updates to old pointers, for yyerror() */
603 oldprevlen = PL_oldbufptr - PL_bufend;
604 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
606 oldunilen = PL_last_uni - PL_bufend;
608 oldloplen = PL_last_lop - PL_bufend;
609 PL_linestart = PL_bufptr = s + prevlen;
610 PL_bufend = s + SvCUR(PL_linestr);
612 PL_oldbufptr = s + oldprevlen;
613 PL_oldoldbufptr = s + oldoldprevlen;
615 PL_last_uni = s + oldunilen;
617 PL_last_lop = s + oldloplen;
620 /* debugger active and we're not compiling the debugger code,
621 * so store the line into the debugger's array of lines
623 if (PERLDB_LINE && PL_curstash != PL_debstash) {
624 SV *sv = NEWSV(85,0);
626 sv_upgrade(sv, SVt_PVMG);
627 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
628 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
635 * Check the unary operators to ensure there's no ambiguity in how they're
636 * used. An ambiguous piece of code would be:
638 * This doesn't mean rand() + 5. Because rand() is a unary operator,
639 * the +5 is its argument.
648 if (PL_oldoldbufptr != PL_last_uni)
650 while (isSPACE(*PL_last_uni))
652 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
653 if ((t = strchr(s, '(')) && t < PL_bufptr)
655 if (ckWARN_d(WARN_AMBIGUOUS)){
658 Perl_warner(aTHX_ WARN_AMBIGUOUS,
659 "Warning: Use of \"%s\" without parens is ambiguous",
665 /* workaround to replace the UNI() macro with a function. Only the
666 * hints/uts.sh file mentions this. Other comments elsewhere in the
667 * source indicate Microport Unix might need it too.
673 #define UNI(f) return uni(f,s)
676 S_uni(pTHX_ I32 f, char *s)
681 PL_last_uni = PL_oldbufptr;
692 #endif /* CRIPPLED_CC */
695 * LOP : macro to build a list operator. Its behaviour has been replaced
696 * with a subroutine, S_lop() for which LOP is just another name.
699 #define LOP(f,x) return lop(f,x,s)
703 * Build a list operator (or something that might be one). The rules:
704 * - if we have a next token, then it's a list operator [why?]
705 * - if the next thing is an opening paren, then it's a function
706 * - else it's a list operator
710 S_lop(pTHX_ I32 f, int x, char *s)
717 PL_last_lop = PL_oldbufptr;
732 * When the lexer realizes it knows the next token (for instance,
733 * it is reordering tokens for the parser) then it can call S_force_next
734 * to know what token to return the next time the lexer is called. Caller
735 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
736 * handles the token correctly.
740 S_force_next(pTHX_ I32 type)
742 PL_nexttype[PL_nexttoke] = type;
744 if (PL_lex_state != LEX_KNOWNEXT) {
745 PL_lex_defer = PL_lex_state;
746 PL_lex_expect = PL_expect;
747 PL_lex_state = LEX_KNOWNEXT;
753 * When the lexer knows the next thing is a word (for instance, it has
754 * just seen -> and it knows that the next char is a word char, then
755 * it calls S_force_word to stick the next word into the PL_next lookahead.
758 * char *start : buffer position (must be within PL_linestr)
759 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
760 * int check_keyword : if true, Perl checks to make sure the word isn't
761 * a keyword (do this if the word is a label, e.g. goto FOO)
762 * int allow_pack : if true, : characters will also be allowed (require,
764 * int allow_initial_tick : used by the "sub" lexer only.
768 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
773 start = skipspace(start);
775 if (isIDFIRST_lazy_if(s,UTF) ||
776 (allow_pack && *s == ':') ||
777 (allow_initial_tick && *s == '\'') )
779 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
780 if (check_keyword && keyword(PL_tokenbuf, len))
782 if (token == METHOD) {
787 PL_expect = XOPERATOR;
790 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
791 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
799 * Called when the lexer wants $foo *foo &foo etc, but the program
800 * text only contains the "foo" portion. The first argument is a pointer
801 * to the "foo", and the second argument is the type symbol to prefix.
802 * Forces the next token to be a "WORD".
803 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
807 S_force_ident(pTHX_ register char *s, int kind)
810 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
811 PL_nextval[PL_nexttoke].opval = o;
814 o->op_private = OPpCONST_ENTERED;
815 /* XXX see note in pp_entereval() for why we forgo typo
816 warnings if the symbol must be introduced in an eval.
818 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
819 kind == '$' ? SVt_PV :
820 kind == '@' ? SVt_PVAV :
821 kind == '%' ? SVt_PVHV :
829 Perl_str_to_version(pTHX_ SV *sv)
834 char *start = SvPVx(sv,len);
835 bool utf = SvUTF8(sv) ? TRUE : FALSE;
836 char *end = start + len;
837 while (start < end) {
841 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
846 retval += ((NV)n)/nshift;
855 * Forces the next token to be a version number.
859 S_force_version(pTHX_ char *s)
861 OP *version = Nullop;
870 for (; isDIGIT(*d) || *d == '_' || *d == '.'; d++);
871 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
873 s = scan_num(s, &yylval);
874 version = yylval.opval;
875 ver = cSVOPx(version)->op_sv;
876 if (SvPOK(ver) && !SvNIOK(ver)) {
877 (void)SvUPGRADE(ver, SVt_PVNV);
878 SvNVX(ver) = str_to_version(ver);
879 SvNOK_on(ver); /* hint that it is a version */
884 /* NOTE: The parser sees the package name and the VERSION swapped */
885 PL_nextval[PL_nexttoke].opval = version;
893 * Tokenize a quoted string passed in as an SV. It finds the next
894 * chunk, up to end of string or a backslash. It may make a new
895 * SV containing that chunk (if HINT_NEW_STRING is on). It also
900 S_tokeq(pTHX_ SV *sv)
911 s = SvPV_force(sv, len);
912 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
915 while (s < send && *s != '\\')
920 if ( PL_hints & HINT_NEW_STRING ) {
921 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
927 if (s + 1 < send && (s[1] == '\\'))
928 s++; /* all that, just for this */
933 SvCUR_set(sv, d - SvPVX(sv));
935 if ( PL_hints & HINT_NEW_STRING )
936 return new_constant(NULL, 0, "q", sv, pv, "q");
941 * Now come three functions related to double-quote context,
942 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
943 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
944 * interact with PL_lex_state, and create fake ( ... ) argument lists
945 * to handle functions and concatenation.
946 * They assume that whoever calls them will be setting up a fake
947 * join call, because each subthing puts a ',' after it. This lets
950 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
952 * (I'm not sure whether the spurious commas at the end of lcfirst's
953 * arguments and join's arguments are created or not).
958 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
960 * Pattern matching will set PL_lex_op to the pattern-matching op to
961 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
963 * OP_CONST and OP_READLINE are easy--just make the new op and return.
965 * Everything else becomes a FUNC.
967 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
968 * had an OP_CONST or OP_READLINE). This just sets us up for a
969 * call to S_sublex_push().
975 register I32 op_type = yylval.ival;
977 if (op_type == OP_NULL) {
978 yylval.opval = PL_lex_op;
982 if (op_type == OP_CONST || op_type == OP_READLINE) {
983 SV *sv = tokeq(PL_lex_stuff);
985 if (SvTYPE(sv) == SVt_PVIV) {
986 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
992 nsv = newSVpvn(p, len);
998 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
999 PL_lex_stuff = Nullsv;
1003 PL_sublex_info.super_state = PL_lex_state;
1004 PL_sublex_info.sub_inwhat = op_type;
1005 PL_sublex_info.sub_op = PL_lex_op;
1006 PL_lex_state = LEX_INTERPPUSH;
1010 yylval.opval = PL_lex_op;
1020 * Create a new scope to save the lexing state. The scope will be
1021 * ended in S_sublex_done. Returns a '(', starting the function arguments
1022 * to the uc, lc, etc. found before.
1023 * Sets PL_lex_state to LEX_INTERPCONCAT.
1031 PL_lex_state = PL_sublex_info.super_state;
1032 SAVEI32(PL_lex_dojoin);
1033 SAVEI32(PL_lex_brackets);
1034 SAVEI32(PL_lex_casemods);
1035 SAVEI32(PL_lex_starts);
1036 SAVEI32(PL_lex_state);
1037 SAVEVPTR(PL_lex_inpat);
1038 SAVEI32(PL_lex_inwhat);
1039 SAVECOPLINE(PL_curcop);
1040 SAVEPPTR(PL_bufptr);
1041 SAVEPPTR(PL_oldbufptr);
1042 SAVEPPTR(PL_oldoldbufptr);
1043 SAVEPPTR(PL_last_lop);
1044 SAVEPPTR(PL_last_uni);
1045 SAVEPPTR(PL_linestart);
1046 SAVESPTR(PL_linestr);
1047 SAVEPPTR(PL_lex_brackstack);
1048 SAVEPPTR(PL_lex_casestack);
1050 PL_linestr = PL_lex_stuff;
1051 PL_lex_stuff = Nullsv;
1053 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1054 = SvPVX(PL_linestr);
1055 PL_bufend += SvCUR(PL_linestr);
1056 PL_last_lop = PL_last_uni = Nullch;
1057 SAVEFREESV(PL_linestr);
1059 PL_lex_dojoin = FALSE;
1060 PL_lex_brackets = 0;
1061 New(899, PL_lex_brackstack, 120, char);
1062 New(899, PL_lex_casestack, 12, char);
1063 SAVEFREEPV(PL_lex_brackstack);
1064 SAVEFREEPV(PL_lex_casestack);
1065 PL_lex_casemods = 0;
1066 *PL_lex_casestack = '\0';
1068 PL_lex_state = LEX_INTERPCONCAT;
1069 CopLINE_set(PL_curcop, PL_multi_start);
1071 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1072 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1073 PL_lex_inpat = PL_sublex_info.sub_op;
1075 PL_lex_inpat = Nullop;
1082 * Restores lexer state after a S_sublex_push.
1088 if (!PL_lex_starts++) {
1089 SV *sv = newSVpvn("",0);
1090 if (SvUTF8(PL_linestr))
1092 PL_expect = XOPERATOR;
1093 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1097 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1098 PL_lex_state = LEX_INTERPCASEMOD;
1102 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1103 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1104 PL_linestr = PL_lex_repl;
1106 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1107 PL_bufend += SvCUR(PL_linestr);
1108 PL_last_lop = PL_last_uni = Nullch;
1109 SAVEFREESV(PL_linestr);
1110 PL_lex_dojoin = FALSE;
1111 PL_lex_brackets = 0;
1112 PL_lex_casemods = 0;
1113 *PL_lex_casestack = '\0';
1115 if (SvEVALED(PL_lex_repl)) {
1116 PL_lex_state = LEX_INTERPNORMAL;
1118 /* we don't clear PL_lex_repl here, so that we can check later
1119 whether this is an evalled subst; that means we rely on the
1120 logic to ensure sublex_done() is called again only via the
1121 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1124 PL_lex_state = LEX_INTERPCONCAT;
1125 PL_lex_repl = Nullsv;
1131 PL_bufend = SvPVX(PL_linestr);
1132 PL_bufend += SvCUR(PL_linestr);
1133 PL_expect = XOPERATOR;
1134 PL_sublex_info.sub_inwhat = 0;
1142 Extracts a pattern, double-quoted string, or transliteration. This
1145 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1146 processing a pattern (PL_lex_inpat is true), a transliteration
1147 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1149 Returns a pointer to the character scanned up to. Iff this is
1150 advanced from the start pointer supplied (ie if anything was
1151 successfully parsed), will leave an OP for the substring scanned
1152 in yylval. Caller must intuit reason for not parsing further
1153 by looking at the next characters herself.
1157 double-quoted style: \r and \n
1158 regexp special ones: \D \s
1160 backrefs: \1 (deprecated in substitution replacements)
1161 case and quoting: \U \Q \E
1162 stops on @ and $, but not for $ as tail anchor
1164 In transliterations:
1165 characters are VERY literal, except for - not at the start or end
1166 of the string, which indicates a range. scan_const expands the
1167 range to the full set of intermediate characters.
1169 In double-quoted strings:
1171 double-quoted style: \r and \n
1173 backrefs: \1 (deprecated)
1174 case and quoting: \U \Q \E
1177 scan_const does *not* construct ops to handle interpolated strings.
1178 It stops processing as soon as it finds an embedded $ or @ variable
1179 and leaves it to the caller to work out what's going on.
1181 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1183 $ in pattern could be $foo or could be tail anchor. Assumption:
1184 it's a tail anchor if $ is the last thing in the string, or if it's
1185 followed by one of ")| \n\t"
1187 \1 (backreferences) are turned into $1
1189 The structure of the code is
1190 while (there's a character to process) {
1191 handle transliteration ranges
1192 skip regexp comments
1193 skip # initiated comments in //x patterns
1194 check for embedded @foo
1195 check for embedded scalars
1197 leave intact backslashes from leave (below)
1198 deprecate \1 in strings and sub replacements
1199 handle string-changing backslashes \l \U \Q \E, etc.
1200 switch (what was escaped) {
1201 handle - in a transliteration (becomes a literal -)
1202 handle \132 octal characters
1203 handle 0x15 hex characters
1204 handle \cV (control V)
1205 handle printf backslashes (\f, \r, \n, etc)
1207 } (end if backslash)
1208 } (end while character to read)
1213 S_scan_const(pTHX_ char *start)
1215 register char *send = PL_bufend; /* end of the constant */
1216 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1217 register char *s = start; /* start of the constant */
1218 register char *d = SvPVX(sv); /* destination for copies */
1219 bool dorange = FALSE; /* are we in a translit range? */
1220 bool didrange = FALSE; /* did we just finish a range? */
1221 bool has_utf8 = (PL_linestr && SvUTF8(PL_linestr));
1222 /* the constant is UTF8 */
1225 I32 utf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1226 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1228 I32 this_utf8 = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1229 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ?
1230 OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
1232 const char *leaveit = /* set of acceptably-backslashed characters */
1234 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1237 while (s < send || dorange) {
1238 /* get transliterations out of the way (they're most literal) */
1239 if (PL_lex_inwhat == OP_TRANS) {
1240 /* expand a range A-Z to the full set of characters. AIE! */
1242 I32 i; /* current expanded character */
1243 I32 min; /* first character in range */
1244 I32 max; /* last character in range */
1247 char *c = (char*)utf8_hop((U8*)d, -1);
1252 /* mark the range as done, and continue */
1257 i = d - SvPVX(sv); /* remember current offset */
1258 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1259 d = SvPVX(sv) + i; /* refresh d after realloc */
1260 d -= 2; /* eat the first char and the - */
1262 min = (U8)*d; /* first char in range */
1263 max = (U8)d[1]; /* last char in range */
1267 "Invalid [] range \"%c-%c\" in transliteration operator",
1268 (char)min, (char)max);
1272 if ((isLOWER(min) && isLOWER(max)) ||
1273 (isUPPER(min) && isUPPER(max))) {
1275 for (i = min; i <= max; i++)
1277 *d++ = NATIVE_TO_NEED(has_utf8,i);
1279 for (i = min; i <= max; i++)
1281 *d++ = NATIVE_TO_NEED(has_utf8,i);
1286 for (i = min; i <= max; i++)
1289 /* mark the range as done, and continue */
1295 /* range begins (ignore - as first or last char) */
1296 else if (*s == '-' && s+1 < send && s != start) {
1298 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
1301 *d++ = (char)0xff; /* use illegal utf8 byte--see pmtrans */
1313 /* if we get here, we're not doing a transliteration */
1315 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1316 except for the last char, which will be done separately. */
1317 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1319 while (s < send && *s != ')')
1320 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1322 else if (s[2] == '{' /* This should match regcomp.c */
1323 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1326 char *regparse = s + (s[2] == '{' ? 3 : 4);
1329 while (count && (c = *regparse)) {
1330 if (c == '\\' && regparse[1])
1338 if (*regparse != ')') {
1339 regparse--; /* Leave one char for continuation. */
1340 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1342 while (s < regparse)
1343 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1347 /* likewise skip #-initiated comments in //x patterns */
1348 else if (*s == '#' && PL_lex_inpat &&
1349 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1350 while (s+1 < send && *s != '\n')
1351 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1354 /* check for embedded arrays
1355 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1357 else if (*s == '@' && s[1]
1358 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
1361 /* check for embedded scalars. only stop if we're sure it's a
1364 else if (*s == '$') {
1365 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1367 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1368 break; /* in regexp, $ might be tail anchor */
1372 if (*s == '\\' && s+1 < send) {
1375 /* some backslashes we leave behind */
1376 if (*leaveit && *s && strchr(leaveit, *s)) {
1377 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
1378 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1382 /* deprecate \1 in strings and substitution replacements */
1383 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1384 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1386 if (ckWARN(WARN_SYNTAX))
1387 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1392 /* string-change backslash escapes */
1393 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1398 /* if we get here, it's either a quoted -, or a digit */
1401 /* quoted - in transliterations */
1403 if (PL_lex_inwhat == OP_TRANS) {
1410 if (ckWARN(WARN_MISC) && isALNUM(*s))
1411 Perl_warner(aTHX_ WARN_MISC,
1412 "Unrecognized escape \\%c passed through",
1414 /* default action is to copy the quoted character */
1415 goto default_action;
1418 /* \132 indicates an octal constant */
1419 case '0': case '1': case '2': case '3':
1420 case '4': case '5': case '6': case '7':
1422 STRLEN len = 0; /* disallow underscores */
1423 uv = (UV)scan_oct(s, 3, &len);
1426 goto NUM_ESCAPE_INSERT;
1428 /* \x24 indicates a hex constant */
1432 char* e = strchr(s, '}');
1434 yyerror("Missing right brace on \\x{}");
1438 STRLEN len = 1; /* allow underscores */
1439 uv = (UV)scan_hex(s + 1, e - s - 1, &len);
1445 STRLEN len = 0; /* disallow underscores */
1446 uv = (UV)scan_hex(s, 2, &len);
1452 /* Insert oct or hex escaped character.
1453 * There will always enough room in sv since such
1454 * escapes will be longer than any UTF-8 sequence
1455 * they can end up as. */
1457 /* We need to map to chars to ASCII before doing the tests
1460 if (!UTF8_IS_INVARIANT(uv)) {
1461 if (!has_utf8 && uv > 255) {
1462 /* Might need to recode whatever we have
1463 * accumulated so far if it contains any
1466 * (Can't we keep track of that and avoid
1467 * this rescan? --jhi)
1471 for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) {
1472 if (!UTF8_IS_INVARIANT(*c)) {
1477 STRLEN offset = d - SvPVX(sv);
1479 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
1483 while (src >= (U8 *)SvPVX(sv)) {
1484 if (!UTF8_IS_INVARIANT(*src)) {
1485 U8 ch = NATIVE_TO_ASCII(*src);
1486 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1487 *dst-- = UTF8_EIGHT_BIT_HI(ch);
1497 if (has_utf8 || uv > 255) {
1498 d = (char*)uvchr_to_utf8((U8*)d, uv);
1500 if (PL_lex_inwhat == OP_TRANS &&
1501 PL_sublex_info.sub_op) {
1502 PL_sublex_info.sub_op->op_private |=
1503 (PL_lex_repl ? OPpTRANS_FROM_UTF
1513 *d++ = NATIVE_TO_NEED(has_utf8,uv);
1517 /* \N{latin small letter a} is a named character */
1521 char* e = strchr(s, '}');
1527 yyerror("Missing right brace on \\N{}");
1531 res = newSVpvn(s + 1, e - s - 1);
1532 res = new_constant( Nullch, 0, "charnames",
1533 res, Nullsv, "\\N{...}" );
1535 sv_utf8_upgrade(res);
1536 str = SvPV(res,len);
1537 if (!has_utf8 && SvUTF8(res)) {
1538 char *ostart = SvPVX(sv);
1539 SvCUR_set(sv, d - ostart);
1542 sv_utf8_upgrade(sv);
1543 /* this just broke our allocation above... */
1544 SvGROW(sv, send - start);
1545 d = SvPVX(sv) + SvCUR(sv);
1548 if (len > e - s + 4) {
1549 char *odest = SvPVX(sv);
1551 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
1552 d = SvPVX(sv) + (d - odest);
1554 Copy(str, d, len, char);
1561 yyerror("Missing braces on \\N{}");
1564 /* \c is a control character */
1573 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
1577 /* printf-style backslashes, formfeeds, newlines, etc */
1579 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
1582 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
1585 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
1588 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
1591 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
1594 *d++ = ASCII_TO_NEED(has_utf8,'\033');
1597 *d++ = ASCII_TO_NEED(has_utf8,'\007');
1603 } /* end if (backslash) */
1606 /* The 'has_utf8' here is very dubious */
1607 if (!UTF8_IS_INVARIANT((U8)(*s)) && (this_utf8 || has_utf8)) {
1608 STRLEN len = (STRLEN) -1;
1611 uv = utf8n_to_uvchr((U8*)s, send - s, &len, 0);
1613 if (len == (STRLEN)-1) {
1614 /* Illegal UTF8 (a high-bit byte), make it valid. */
1615 char *old_pvx = SvPVX(sv);
1616 /* need space for one extra char (NOTE: SvCUR() not set here) */
1617 d = SvGROW(sv, SvLEN(sv) + 1) + (d - old_pvx);
1618 d = (char*)uvchr_to_utf8((U8*)d, (U8)*s++);
1625 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1626 PL_sublex_info.sub_op->op_private |=
1627 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1632 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1633 } /* while loop to process each character */
1635 /* terminate the string and set up the sv */
1637 SvCUR_set(sv, d - SvPVX(sv));
1642 /* shrink the sv if we allocated more than we used */
1643 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1644 SvLEN_set(sv, SvCUR(sv) + 1);
1645 Renew(SvPVX(sv), SvLEN(sv), char);
1648 /* return the substring (via yylval) only if we parsed anything */
1649 if (s > PL_bufptr) {
1650 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1651 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1653 ( PL_lex_inwhat == OP_TRANS
1655 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1658 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1665 * Returns TRUE if there's more to the expression (e.g., a subscript),
1668 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1670 * ->[ and ->{ return TRUE
1671 * { and [ outside a pattern are always subscripts, so return TRUE
1672 * if we're outside a pattern and it's not { or [, then return FALSE
1673 * if we're in a pattern and the first char is a {
1674 * {4,5} (any digits around the comma) returns FALSE
1675 * if we're in a pattern and the first char is a [
1677 * [SOMETHING] has a funky algorithm to decide whether it's a
1678 * character class or not. It has to deal with things like
1679 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1680 * anything else returns TRUE
1683 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1686 S_intuit_more(pTHX_ register char *s)
1688 if (PL_lex_brackets)
1690 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1692 if (*s != '{' && *s != '[')
1697 /* In a pattern, so maybe we have {n,m}. */
1714 /* On the other hand, maybe we have a character class */
1717 if (*s == ']' || *s == '^')
1720 /* this is terrifying, and it works */
1721 int weight = 2; /* let's weigh the evidence */
1723 unsigned char un_char = 255, last_un_char;
1724 char *send = strchr(s,']');
1725 char tmpbuf[sizeof PL_tokenbuf * 4];
1727 if (!send) /* has to be an expression */
1730 Zero(seen,256,char);
1733 else if (isDIGIT(*s)) {
1735 if (isDIGIT(s[1]) && s[2] == ']')
1741 for (; s < send; s++) {
1742 last_un_char = un_char;
1743 un_char = (unsigned char)*s;
1748 weight -= seen[un_char] * 10;
1749 if (isALNUM_lazy_if(s+1,UTF)) {
1750 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1751 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1756 else if (*s == '$' && s[1] &&
1757 strchr("[#!%*<>()-=",s[1])) {
1758 if (/*{*/ strchr("])} =",s[2]))
1767 if (strchr("wds]",s[1]))
1769 else if (seen['\''] || seen['"'])
1771 else if (strchr("rnftbxcav",s[1]))
1773 else if (isDIGIT(s[1])) {
1775 while (s[1] && isDIGIT(s[1]))
1785 if (strchr("aA01! ",last_un_char))
1787 if (strchr("zZ79~",s[1]))
1789 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1790 weight -= 5; /* cope with negative subscript */
1793 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1794 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1799 if (keyword(tmpbuf, d - tmpbuf))
1802 if (un_char == last_un_char + 1)
1804 weight -= seen[un_char];
1809 if (weight >= 0) /* probably a character class */
1819 * Does all the checking to disambiguate
1821 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1822 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1824 * First argument is the stuff after the first token, e.g. "bar".
1826 * Not a method if bar is a filehandle.
1827 * Not a method if foo is a subroutine prototyped to take a filehandle.
1828 * Not a method if it's really "Foo $bar"
1829 * Method if it's "foo $bar"
1830 * Not a method if it's really "print foo $bar"
1831 * Method if it's really "foo package::" (interpreted as package->foo)
1832 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1833 * Not a method if bar is a filehandle or package, but is quoted with
1838 S_intuit_method(pTHX_ char *start, GV *gv)
1840 char *s = start + (*start == '$');
1841 char tmpbuf[sizeof PL_tokenbuf];
1849 if ((cv = GvCVu(gv))) {
1850 char *proto = SvPVX(cv);
1860 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1861 /* start is the beginning of the possible filehandle/object,
1862 * and s is the end of it
1863 * tmpbuf is a copy of it
1866 if (*start == '$') {
1867 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1872 return *s == '(' ? FUNCMETH : METHOD;
1874 if (!keyword(tmpbuf, len)) {
1875 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1880 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1881 if (indirgv && GvCVu(indirgv))
1883 /* filehandle or package name makes it a method */
1884 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1886 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1887 return 0; /* no assumptions -- "=>" quotes bearword */
1889 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1890 newSVpvn(tmpbuf,len));
1891 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1895 return *s == '(' ? FUNCMETH : METHOD;
1903 * Return a string of Perl code to load the debugger. If PERL5DB
1904 * is set, it will return the contents of that, otherwise a
1905 * compile-time require of perl5db.pl.
1912 char *pdb = PerlEnv_getenv("PERL5DB");
1916 SETERRNO(0,SS$_NORMAL);
1917 return "BEGIN { require 'perl5db.pl' }";
1923 /* Encoded script support. filter_add() effectively inserts a
1924 * 'pre-processing' function into the current source input stream.
1925 * Note that the filter function only applies to the current source file
1926 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1928 * The datasv parameter (which may be NULL) can be used to pass
1929 * private data to this instance of the filter. The filter function
1930 * can recover the SV using the FILTER_DATA macro and use it to
1931 * store private buffers and state information.
1933 * The supplied datasv parameter is upgraded to a PVIO type
1934 * and the IoDIRP/IoANY field is used to store the function pointer,
1935 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1936 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1937 * private use must be set using malloc'd pointers.
1941 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1946 if (!PL_rsfp_filters)
1947 PL_rsfp_filters = newAV();
1949 datasv = NEWSV(255,0);
1950 if (!SvUPGRADE(datasv, SVt_PVIO))
1951 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1952 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1953 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1954 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1955 funcp, SvPV_nolen(datasv)));
1956 av_unshift(PL_rsfp_filters, 1);
1957 av_store(PL_rsfp_filters, 0, datasv) ;
1962 /* Delete most recently added instance of this filter function. */
1964 Perl_filter_del(pTHX_ filter_t funcp)
1967 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1968 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1970 /* if filter is on top of stack (usual case) just pop it off */
1971 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1972 if (IoANY(datasv) == (void *)funcp) {
1973 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1974 IoANY(datasv) = (void *)NULL;
1975 sv_free(av_pop(PL_rsfp_filters));
1979 /* we need to search for the correct entry and clear it */
1980 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1984 /* Invoke the n'th filter function for the current rsfp. */
1986 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1989 /* 0 = read one text line */
1994 if (!PL_rsfp_filters)
1996 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1997 /* Provide a default input filter to make life easy. */
1998 /* Note that we append to the line. This is handy. */
1999 DEBUG_P(PerlIO_printf(Perl_debug_log,
2000 "filter_read %d: from rsfp\n", idx));
2004 int old_len = SvCUR(buf_sv) ;
2006 /* ensure buf_sv is large enough */
2007 SvGROW(buf_sv, old_len + maxlen) ;
2008 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2009 if (PerlIO_error(PL_rsfp))
2010 return -1; /* error */
2012 return 0 ; /* end of file */
2014 SvCUR_set(buf_sv, old_len + len) ;
2017 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2018 if (PerlIO_error(PL_rsfp))
2019 return -1; /* error */
2021 return 0 ; /* end of file */
2024 return SvCUR(buf_sv);
2026 /* Skip this filter slot if filter has been deleted */
2027 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
2028 DEBUG_P(PerlIO_printf(Perl_debug_log,
2029 "filter_read %d: skipped (filter deleted)\n",
2031 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2033 /* Get function pointer hidden within datasv */
2034 funcp = (filter_t)IoANY(datasv);
2035 DEBUG_P(PerlIO_printf(Perl_debug_log,
2036 "filter_read %d: via function %p (%s)\n",
2037 idx, funcp, SvPV_nolen(datasv)));
2038 /* Call function. The function is expected to */
2039 /* call "FILTER_READ(idx+1, buf_sv)" first. */
2040 /* Return: <0:error, =0:eof, >0:not eof */
2041 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
2045 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
2047 #ifdef PERL_CR_FILTER
2048 if (!PL_rsfp_filters) {
2049 filter_add(S_cr_textfilter,NULL);
2052 if (PL_rsfp_filters) {
2055 SvCUR_set(sv, 0); /* start with empty line */
2056 if (FILTER_READ(0, sv, 0) > 0)
2057 return ( SvPVX(sv) ) ;
2062 return (sv_gets(sv, fp, append));
2066 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2070 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2074 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2075 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2077 return GvHV(gv); /* Foo:: */
2080 /* use constant CLASS => 'MyClass' */
2081 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2083 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2084 pkgname = SvPV_nolen(sv);
2088 return gv_stashpv(pkgname, FALSE);
2092 static char* exp_name[] =
2093 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2094 "ATTRTERM", "TERMBLOCK"
2101 Works out what to call the token just pulled out of the input
2102 stream. The yacc parser takes care of taking the ops we return and
2103 stitching them into a tree.
2109 if read an identifier
2110 if we're in a my declaration
2111 croak if they tried to say my($foo::bar)
2112 build the ops for a my() declaration
2113 if it's an access to a my() variable
2114 are we in a sort block?
2115 croak if my($a); $a <=> $b
2116 build ops for access to a my() variable
2117 if in a dq string, and they've said @foo and we can't find @foo
2119 build ops for a bareword
2120 if we already built the token before, use it.
2123 #ifdef USE_PURE_BISON
2125 Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
2130 yylval_pointer[yyactlevel] = lvalp;
2131 yychar_pointer[yyactlevel] = lcharp;
2132 if (yyactlevel >= YYMAXLEVEL)
2133 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
2135 r = Perl_yylex(aTHX);
2145 #pragma segment Perl_yylex
2158 /* check if there's an identifier for us to look at */
2159 if (PL_pending_ident) {
2160 /* pit holds the identifier we read and pending_ident is reset */
2161 char pit = PL_pending_ident;
2162 PL_pending_ident = 0;
2164 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2165 "### Tokener saw identifier '%s'\n", PL_tokenbuf); })
2167 /* if we're in a my(), we can't allow dynamics here.
2168 $foo'bar has already been turned into $foo::bar, so
2169 just check for colons.
2171 if it's a legal name, the OP is a PADANY.
2174 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2175 if (strchr(PL_tokenbuf,':'))
2176 yyerror(Perl_form(aTHX_ "No package name allowed for "
2177 "variable %s in \"our\"",
2179 tmp = pad_allocmy(PL_tokenbuf);
2182 if (strchr(PL_tokenbuf,':'))
2183 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2185 yylval.opval = newOP(OP_PADANY, 0);
2186 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2192 build the ops for accesses to a my() variable.
2194 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2195 then used in a comparison. This catches most, but not
2196 all cases. For instance, it catches
2197 sort { my($a); $a <=> $b }
2199 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2200 (although why you'd do that is anyone's guess).
2203 if (!strchr(PL_tokenbuf,':')) {
2205 /* Check for single character per-thread SVs */
2206 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2207 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2208 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2210 yylval.opval = newOP(OP_THREADSV, 0);
2211 yylval.opval->op_targ = tmp;
2214 #endif /* USE_THREADS */
2215 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2216 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2217 /* might be an "our" variable" */
2218 if (SvFLAGS(namesv) & SVpad_OUR) {
2219 /* build ops for a bareword */
2220 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2221 sv_catpvn(sym, "::", 2);
2222 sv_catpv(sym, PL_tokenbuf+1);
2223 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2224 yylval.opval->op_private = OPpCONST_ENTERED;
2225 gv_fetchpv(SvPVX(sym),
2227 ? (GV_ADDMULTI | GV_ADDINEVAL)
2230 ((PL_tokenbuf[0] == '$') ? SVt_PV
2231 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2236 /* if it's a sort block and they're naming $a or $b */
2237 if (PL_last_lop_op == OP_SORT &&
2238 PL_tokenbuf[0] == '$' &&
2239 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2242 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2243 d < PL_bufend && *d != '\n';
2246 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2247 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2253 yylval.opval = newOP(OP_PADANY, 0);
2254 yylval.opval->op_targ = tmp;
2260 Whine if they've said @foo in a doublequoted string,
2261 and @foo isn't a variable we can find in the symbol
2264 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2265 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2266 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2267 && ckWARN(WARN_AMBIGUOUS))
2269 /* Downgraded from fatal to warning 20000522 mjd */
2270 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2271 "Possible unintended interpolation of %s in string",
2276 /* build ops for a bareword */
2277 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2278 yylval.opval->op_private = OPpCONST_ENTERED;
2279 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2280 ((PL_tokenbuf[0] == '$') ? SVt_PV
2281 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2286 /* no identifier pending identification */
2288 switch (PL_lex_state) {
2290 case LEX_NORMAL: /* Some compilers will produce faster */
2291 case LEX_INTERPNORMAL: /* code if we comment these out. */
2295 /* when we've already built the next token, just pull it out of the queue */
2298 yylval = PL_nextval[PL_nexttoke];
2300 PL_lex_state = PL_lex_defer;
2301 PL_expect = PL_lex_expect;
2302 PL_lex_defer = LEX_NORMAL;
2304 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2305 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
2306 (IV)PL_nexttype[PL_nexttoke]); })
2308 return(PL_nexttype[PL_nexttoke]);
2310 /* interpolated case modifiers like \L \U, including \Q and \E.
2311 when we get here, PL_bufptr is at the \
2313 case LEX_INTERPCASEMOD:
2315 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2316 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2318 /* handle \E or end of string */
2319 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2323 if (PL_lex_casemods) {
2324 oldmod = PL_lex_casestack[--PL_lex_casemods];
2325 PL_lex_casestack[PL_lex_casemods] = '\0';
2327 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2329 PL_lex_state = LEX_INTERPCONCAT;
2333 if (PL_bufptr != PL_bufend)
2335 PL_lex_state = LEX_INTERPCONCAT;
2339 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2340 "### Saw case modifier at '%s'\n", PL_bufptr); })
2342 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2343 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2344 if (strchr("LU", *s) &&
2345 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2347 PL_lex_casestack[--PL_lex_casemods] = '\0';
2350 if (PL_lex_casemods > 10) {
2351 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2352 if (newlb != PL_lex_casestack) {
2354 PL_lex_casestack = newlb;
2357 PL_lex_casestack[PL_lex_casemods++] = *s;
2358 PL_lex_casestack[PL_lex_casemods] = '\0';
2359 PL_lex_state = LEX_INTERPCONCAT;
2360 PL_nextval[PL_nexttoke].ival = 0;
2363 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2365 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2367 PL_nextval[PL_nexttoke].ival = OP_LC;
2369 PL_nextval[PL_nexttoke].ival = OP_UC;
2371 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2373 Perl_croak(aTHX_ "panic: yylex");
2376 if (PL_lex_starts) {
2385 case LEX_INTERPPUSH:
2386 return sublex_push();
2388 case LEX_INTERPSTART:
2389 if (PL_bufptr == PL_bufend)
2390 return sublex_done();
2391 DEBUG_T({ PerlIO_printf(Perl_debug_log,
2392 "### Interpolated variable at '%s'\n", PL_bufptr); })
2394 PL_lex_dojoin = (*PL_bufptr == '@');
2395 PL_lex_state = LEX_INTERPNORMAL;
2396 if (PL_lex_dojoin) {
2397 PL_nextval[PL_nexttoke].ival = 0;
2400 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2401 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2402 force_next(PRIVATEREF);
2404 force_ident("\"", '$');
2405 #endif /* USE_THREADS */
2406 PL_nextval[PL_nexttoke].ival = 0;
2408 PL_nextval[PL_nexttoke].ival = 0;
2410 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2413 if (PL_lex_starts++) {
2419 case LEX_INTERPENDMAYBE:
2420 if (intuit_more(PL_bufptr)) {
2421 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2427 if (PL_lex_dojoin) {
2428 PL_lex_dojoin = FALSE;
2429 PL_lex_state = LEX_INTERPCONCAT;
2432 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2433 && SvEVALED(PL_lex_repl))
2435 if (PL_bufptr != PL_bufend)
2436 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2437 PL_lex_repl = Nullsv;
2440 case LEX_INTERPCONCAT:
2442 if (PL_lex_brackets)
2443 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2445 if (PL_bufptr == PL_bufend)
2446 return sublex_done();
2448 if (SvIVX(PL_linestr) == '\'') {
2449 SV *sv = newSVsv(PL_linestr);
2452 else if ( PL_hints & HINT_NEW_RE )
2453 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2454 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2458 s = scan_const(PL_bufptr);
2460 PL_lex_state = LEX_INTERPCASEMOD;
2462 PL_lex_state = LEX_INTERPSTART;
2465 if (s != PL_bufptr) {
2466 PL_nextval[PL_nexttoke] = yylval;
2469 if (PL_lex_starts++)
2479 PL_lex_state = LEX_NORMAL;
2480 s = scan_formline(PL_bufptr);
2481 if (!PL_lex_formbrack)
2487 PL_oldoldbufptr = PL_oldbufptr;
2490 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2491 exp_name[PL_expect], s);
2497 if (isIDFIRST_lazy_if(s,UTF))
2499 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2502 goto fake_eof; /* emulate EOF on ^D or ^Z */
2507 if (PL_lex_brackets)
2508 yyerror("Missing right curly or square bracket");
2509 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2510 "### Tokener got EOF\n");
2514 if (s++ < PL_bufend)
2515 goto retry; /* ignore stray nulls */
2518 if (!PL_in_eval && !PL_preambled) {
2519 PL_preambled = TRUE;
2520 sv_setpv(PL_linestr,incl_perldb());
2521 if (SvCUR(PL_linestr))
2522 sv_catpv(PL_linestr,";");
2524 while(AvFILLp(PL_preambleav) >= 0) {
2525 SV *tmpsv = av_shift(PL_preambleav);
2526 sv_catsv(PL_linestr, tmpsv);
2527 sv_catpv(PL_linestr, ";");
2530 sv_free((SV*)PL_preambleav);
2531 PL_preambleav = NULL;
2533 if (PL_minus_n || PL_minus_p) {
2534 sv_catpv(PL_linestr, "LINE: while (<>) {");
2536 sv_catpv(PL_linestr,"chomp;");
2538 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2540 GvIMPORTED_AV_on(gv);
2542 if (strchr("/'\"", *PL_splitstr)
2543 && strchr(PL_splitstr + 1, *PL_splitstr))
2544 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2547 s = "'~#\200\1'"; /* surely one char is unused...*/
2548 while (s[1] && strchr(PL_splitstr, *s)) s++;
2550 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2551 "q" + (delim == '\''), delim);
2552 for (s = PL_splitstr; *s; s++) {
2554 sv_catpvn(PL_linestr, "\\", 1);
2555 sv_catpvn(PL_linestr, s, 1);
2557 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2561 sv_catpv(PL_linestr,"@F=split(' ');");
2564 sv_catpv(PL_linestr, "\n");
2565 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2566 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2567 PL_last_lop = PL_last_uni = Nullch;
2568 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2569 SV *sv = NEWSV(85,0);
2571 sv_upgrade(sv, SVt_PVMG);
2572 sv_setsv(sv,PL_linestr);
2573 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2578 bof = PL_rsfp ? TRUE : FALSE;
2579 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2582 if (PL_preprocess && !PL_in_eval)
2583 (void)PerlProc_pclose(PL_rsfp);
2584 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2585 PerlIO_clearerr(PL_rsfp);
2587 (void)PerlIO_close(PL_rsfp);
2589 PL_doextract = FALSE;
2591 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2592 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2593 sv_catpv(PL_linestr,";}");
2594 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2595 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2596 PL_last_lop = PL_last_uni = Nullch;
2597 PL_minus_n = PL_minus_p = 0;
2600 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2601 PL_last_lop = PL_last_uni = Nullch;
2602 sv_setpv(PL_linestr,"");
2603 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2605 /* if it looks like the start of a BOM, check if it in fact is */
2606 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
2607 #ifdef PERLIO_IS_STDIO
2608 # ifdef __GNU_LIBRARY__
2609 # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
2610 # define FTELL_FOR_PIPE_IS_BROKEN
2614 # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2615 # define FTELL_FOR_PIPE_IS_BROKEN
2620 #ifdef FTELL_FOR_PIPE_IS_BROKEN
2621 /* This loses the possibility to detect the bof
2622 * situation on perl -P when the libc5 is being used.
2623 * Workaround? Maybe attach some extra state to PL_rsfp?
2626 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2628 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
2631 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2632 s = swallow_bom((U8*)s);
2636 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2637 PL_doextract = FALSE;
2639 /* Incest with pod. */
2640 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2641 sv_setpv(PL_linestr, "");
2642 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2643 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2644 PL_last_lop = PL_last_uni = Nullch;
2645 PL_doextract = FALSE;
2649 } while (PL_doextract);
2650 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2651 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2652 SV *sv = NEWSV(85,0);
2654 sv_upgrade(sv, SVt_PVMG);
2655 sv_setsv(sv,PL_linestr);
2656 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2658 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2659 PL_last_lop = PL_last_uni = Nullch;
2660 if (CopLINE(PL_curcop) == 1) {
2661 while (s < PL_bufend && isSPACE(*s))
2663 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2667 if (*s == '#' && *(s+1) == '!')
2669 #ifdef ALTERNATE_SHEBANG
2671 static char as[] = ALTERNATE_SHEBANG;
2672 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2673 d = s + (sizeof(as) - 1);
2675 #endif /* ALTERNATE_SHEBANG */
2684 while (*d && !isSPACE(*d))
2688 #ifdef ARG_ZERO_IS_SCRIPT
2689 if (ipathend > ipath) {
2691 * HP-UX (at least) sets argv[0] to the script name,
2692 * which makes $^X incorrect. And Digital UNIX and Linux,
2693 * at least, set argv[0] to the basename of the Perl
2694 * interpreter. So, having found "#!", we'll set it right.
2696 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2697 assert(SvPOK(x) || SvGMAGICAL(x));
2698 if (sv_eq(x, CopFILESV(PL_curcop))) {
2699 sv_setpvn(x, ipath, ipathend - ipath);
2702 TAINT_NOT; /* $^X is always tainted, but that's OK */
2704 #endif /* ARG_ZERO_IS_SCRIPT */
2709 d = instr(s,"perl -");
2711 d = instr(s,"perl");
2713 /* avoid getting into infinite loops when shebang
2714 * line contains "Perl" rather than "perl" */
2716 for (d = ipathend-4; d >= ipath; --d) {
2717 if ((*d == 'p' || *d == 'P')
2718 && !ibcmp(d, "perl", 4))
2728 #ifdef ALTERNATE_SHEBANG
2730 * If the ALTERNATE_SHEBANG on this system starts with a
2731 * character that can be part of a Perl expression, then if
2732 * we see it but not "perl", we're probably looking at the
2733 * start of Perl code, not a request to hand off to some
2734 * other interpreter. Similarly, if "perl" is there, but
2735 * not in the first 'word' of the line, we assume the line
2736 * contains the start of the Perl program.
2738 if (d && *s != '#') {
2740 while (*c && !strchr("; \t\r\n\f\v#", *c))
2743 d = Nullch; /* "perl" not in first word; ignore */
2745 *s = '#'; /* Don't try to parse shebang line */
2747 #endif /* ALTERNATE_SHEBANG */
2748 #ifndef MACOS_TRADITIONAL
2753 !instr(s,"indir") &&
2754 instr(PL_origargv[0],"perl"))
2760 while (s < PL_bufend && isSPACE(*s))
2762 if (s < PL_bufend) {
2763 Newz(899,newargv,PL_origargc+3,char*);
2765 while (s < PL_bufend && !isSPACE(*s))
2768 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2771 newargv = PL_origargv;
2773 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
2774 Perl_croak(aTHX_ "Can't exec %s", ipath);
2778 U32 oldpdb = PL_perldb;
2779 bool oldn = PL_minus_n;
2780 bool oldp = PL_minus_p;
2782 while (*d && !isSPACE(*d)) d++;
2783 while (SPACE_OR_TAB(*d)) d++;
2787 if (*d == 'M' || *d == 'm') {
2789 while (*d && !isSPACE(*d)) d++;
2790 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2793 d = moreswitches(d);
2795 if ((PERLDB_LINE && !oldpdb) ||
2796 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2797 /* if we have already added "LINE: while (<>) {",
2798 we must not do it again */
2800 sv_setpv(PL_linestr, "");
2801 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2802 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2803 PL_last_lop = PL_last_uni = Nullch;
2804 PL_preambled = FALSE;
2806 (void)gv_fetchfile(PL_origfilename);
2813 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2815 PL_lex_state = LEX_FORMLINE;
2820 #ifdef PERL_STRICT_CR
2821 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2823 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2825 case ' ': case '\t': case '\f': case 013:
2826 #ifdef MACOS_TRADITIONAL
2833 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2834 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2835 /* handle eval qq[#line 1 "foo"\n ...] */
2836 CopLINE_dec(PL_curcop);
2840 while (s < d && *s != '\n')
2845 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2847 PL_lex_state = LEX_FORMLINE;
2857 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2864 while (s < PL_bufend && SPACE_OR_TAB(*s))
2867 if (strnEQ(s,"=>",2)) {
2868 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2869 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2870 "### Saw unary minus before =>, forcing word '%s'\n", s);
2872 OPERATOR('-'); /* unary minus */
2874 PL_last_uni = PL_oldbufptr;
2876 case 'r': ftst = OP_FTEREAD; break;
2877 case 'w': ftst = OP_FTEWRITE; break;
2878 case 'x': ftst = OP_FTEEXEC; break;
2879 case 'o': ftst = OP_FTEOWNED; break;
2880 case 'R': ftst = OP_FTRREAD; break;
2881 case 'W': ftst = OP_FTRWRITE; break;
2882 case 'X': ftst = OP_FTREXEC; break;
2883 case 'O': ftst = OP_FTROWNED; break;
2884 case 'e': ftst = OP_FTIS; break;
2885 case 'z': ftst = OP_FTZERO; break;
2886 case 's': ftst = OP_FTSIZE; break;
2887 case 'f': ftst = OP_FTFILE; break;
2888 case 'd': ftst = OP_FTDIR; break;
2889 case 'l': ftst = OP_FTLINK; break;
2890 case 'p': ftst = OP_FTPIPE; break;
2891 case 'S': ftst = OP_FTSOCK; break;
2892 case 'u': ftst = OP_FTSUID; break;
2893 case 'g': ftst = OP_FTSGID; break;
2894 case 'k': ftst = OP_FTSVTX; break;
2895 case 'b': ftst = OP_FTBLK; break;
2896 case 'c': ftst = OP_FTCHR; break;
2897 case 't': ftst = OP_FTTTY; break;
2898 case 'T': ftst = OP_FTTEXT; break;
2899 case 'B': ftst = OP_FTBINARY; break;
2900 case 'M': case 'A': case 'C':
2901 gv_fetchpv("\024",TRUE, SVt_PV);
2903 case 'M': ftst = OP_FTMTIME; break;
2904 case 'A': ftst = OP_FTATIME; break;
2905 case 'C': ftst = OP_FTCTIME; break;
2913 PL_last_lop_op = ftst;
2914 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2915 "### Saw file test %c\n", (int)ftst);
2920 /* Assume it was a minus followed by a one-letter named
2921 * subroutine call (or a -bareword), then. */
2922 DEBUG_T( { PerlIO_printf(Perl_debug_log,
2923 "### %c looked like a file test but was not\n",
2932 if (PL_expect == XOPERATOR)
2937 else if (*s == '>') {
2940 if (isIDFIRST_lazy_if(s,UTF)) {
2941 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2949 if (PL_expect == XOPERATOR)
2952 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2954 OPERATOR('-'); /* unary minus */
2961 if (PL_expect == XOPERATOR)
2966 if (PL_expect == XOPERATOR)
2969 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2975 if (PL_expect != XOPERATOR) {
2976 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2977 PL_expect = XOPERATOR;
2978 force_ident(PL_tokenbuf, '*');
2991 if (PL_expect == XOPERATOR) {
2995 PL_tokenbuf[0] = '%';
2996 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2997 if (!PL_tokenbuf[1]) {
2999 yyerror("Final % should be \\% or %name");
3002 PL_pending_ident = '%';
3021 switch (PL_expect) {
3024 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
3026 PL_bufptr = s; /* update in case we back off */
3032 PL_expect = XTERMBLOCK;
3036 while (isIDFIRST_lazy_if(s,UTF)) {
3037 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3038 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
3039 if (tmp < 0) tmp = -tmp;
3054 d = scan_str(d,TRUE,TRUE);
3056 /* MUST advance bufptr here to avoid bogus
3057 "at end of line" context messages from yyerror().
3059 PL_bufptr = s + len;
3060 yyerror("Unterminated attribute parameter in attribute list");
3063 return 0; /* EOF indicator */
3067 SV *sv = newSVpvn(s, len);
3068 sv_catsv(sv, PL_lex_stuff);
3069 attrs = append_elem(OP_LIST, attrs,
3070 newSVOP(OP_CONST, 0, sv));
3071 SvREFCNT_dec(PL_lex_stuff);
3072 PL_lex_stuff = Nullsv;
3075 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
3076 CvLVALUE_on(PL_compcv);
3077 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
3078 CvLOCKED_on(PL_compcv);
3079 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
3080 CvMETHOD_on(PL_compcv);
3082 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "shared", len))
3083 GvSHARED_on(cGVOPx_gv(yylval.opval));
3085 /* After we've set the flags, it could be argued that
3086 we don't need to do the attributes.pm-based setting
3087 process, and shouldn't bother appending recognized
3088 flags. To experiment with that, uncomment the
3089 following "else": */
3091 attrs = append_elem(OP_LIST, attrs,
3092 newSVOP(OP_CONST, 0,
3096 if (*s == ':' && s[1] != ':')
3099 break; /* require real whitespace or :'s */
3101 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
3102 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
3103 char q = ((*s == '\'') ? '"' : '\'');
3104 /* If here for an expression, and parsed no attrs, back off. */
3105 if (tmp == '=' && !attrs) {
3109 /* MUST advance bufptr here to avoid bogus "at end of line"
3110 context messages from yyerror().
3114 yyerror("Unterminated attribute list");
3116 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3124 PL_nextval[PL_nexttoke].opval = attrs;
3132 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3133 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
3149 if (PL_lex_brackets <= 0)
3150 yyerror("Unmatched right square bracket");
3153 if (PL_lex_state == LEX_INTERPNORMAL) {
3154 if (PL_lex_brackets == 0) {
3155 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3156 PL_lex_state = LEX_INTERPEND;
3163 if (PL_lex_brackets > 100) {
3164 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3165 if (newlb != PL_lex_brackstack) {
3167 PL_lex_brackstack = newlb;
3170 switch (PL_expect) {
3172 if (PL_lex_formbrack) {
3176 if (PL_oldoldbufptr == PL_last_lop)
3177 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3179 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3180 OPERATOR(HASHBRACK);
3182 while (s < PL_bufend && SPACE_OR_TAB(*s))
3185 PL_tokenbuf[0] = '\0';
3186 if (d < PL_bufend && *d == '-') {
3187 PL_tokenbuf[0] = '-';
3189 while (d < PL_bufend && SPACE_OR_TAB(*d))
3192 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3193 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3195 while (d < PL_bufend && SPACE_OR_TAB(*d))
3198 char minus = (PL_tokenbuf[0] == '-');
3199 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3207 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3212 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3217 if (PL_oldoldbufptr == PL_last_lop)
3218 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3220 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3223 OPERATOR(HASHBRACK);
3224 /* This hack serves to disambiguate a pair of curlies
3225 * as being a block or an anon hash. Normally, expectation
3226 * determines that, but in cases where we're not in a
3227 * position to expect anything in particular (like inside
3228 * eval"") we have to resolve the ambiguity. This code
3229 * covers the case where the first term in the curlies is a
3230 * quoted string. Most other cases need to be explicitly
3231 * disambiguated by prepending a `+' before the opening
3232 * curly in order to force resolution as an anon hash.
3234 * XXX should probably propagate the outer expectation
3235 * into eval"" to rely less on this hack, but that could
3236 * potentially break current behavior of eval"".
3240 if (*s == '\'' || *s == '"' || *s == '`') {
3241 /* common case: get past first string, handling escapes */
3242 for (t++; t < PL_bufend && *t != *s;)
3243 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3247 else if (*s == 'q') {
3250 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3254 char open, close, term;
3257 while (t < PL_bufend && isSPACE(*t))
3261 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3265 for (t++; t < PL_bufend; t++) {
3266 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3268 else if (*t == open)
3272 for (t++; t < PL_bufend; t++) {
3273 if (*t == '\\' && t+1 < PL_bufend)
3275 else if (*t == close && --brackets <= 0)
3277 else if (*t == open)
3283 else if (isALNUM_lazy_if(t,UTF)) {
3285 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3288 while (t < PL_bufend && isSPACE(*t))
3290 /* if comma follows first term, call it an anon hash */
3291 /* XXX it could be a comma expression with loop modifiers */
3292 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3293 || (*t == '=' && t[1] == '>')))
3294 OPERATOR(HASHBRACK);
3295 if (PL_expect == XREF)
3298 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3304 yylval.ival = CopLINE(PL_curcop);
3305 if (isSPACE(*s) || *s == '#')
3306 PL_copline = NOLINE; /* invalidate current command line number */
3311 if (PL_lex_brackets <= 0)
3312 yyerror("Unmatched right curly bracket");
3314 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3315 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3316 PL_lex_formbrack = 0;
3317 if (PL_lex_state == LEX_INTERPNORMAL) {
3318 if (PL_lex_brackets == 0) {
3319 if (PL_expect & XFAKEBRACK) {
3320 PL_expect &= XENUMMASK;
3321 PL_lex_state = LEX_INTERPEND;
3323 return yylex(); /* ignore fake brackets */
3325 if (*s == '-' && s[1] == '>')
3326 PL_lex_state = LEX_INTERPENDMAYBE;
3327 else if (*s != '[' && *s != '{')
3328 PL_lex_state = LEX_INTERPEND;
3331 if (PL_expect & XFAKEBRACK) {
3332 PL_expect &= XENUMMASK;
3334 return yylex(); /* ignore fake brackets */
3344 if (PL_expect == XOPERATOR) {
3345 if (ckWARN(WARN_SEMICOLON)
3346 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3348 CopLINE_dec(PL_curcop);
3349 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3350 CopLINE_inc(PL_curcop);
3355 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3357 PL_expect = XOPERATOR;
3358 force_ident(PL_tokenbuf, '&');
3362 yylval.ival = (OPpENTERSUB_AMPER<<8);
3381 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3382 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3384 if (PL_expect == XSTATE && isALPHA(tmp) &&
3385 (s == PL_linestart+1 || s[-2] == '\n') )
3387 if (PL_in_eval && !PL_rsfp) {
3392 if (strnEQ(s,"=cut",4)) {
3406 PL_doextract = TRUE;
3409 if (PL_lex_brackets < PL_lex_formbrack) {
3411 #ifdef PERL_STRICT_CR
3412 for (t = s; SPACE_OR_TAB(*t); t++) ;
3414 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3416 if (*t == '\n' || *t == '#') {
3434 if (PL_expect != XOPERATOR) {
3435 if (s[1] != '<' && !strchr(s,'>'))
3438 s = scan_heredoc(s);
3440 s = scan_inputsymbol(s);
3441 TERM(sublex_start());
3446 SHop(OP_LEFT_SHIFT);
3460 SHop(OP_RIGHT_SHIFT);
3469 if (PL_expect == XOPERATOR) {
3470 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3473 return ','; /* grandfather non-comma-format format */
3477 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3478 PL_tokenbuf[0] = '@';
3479 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3480 sizeof PL_tokenbuf - 1, FALSE);
3481 if (PL_expect == XOPERATOR)
3482 no_op("Array length", s);
3483 if (!PL_tokenbuf[1])
3485 PL_expect = XOPERATOR;
3486 PL_pending_ident = '#';
3490 PL_tokenbuf[0] = '$';
3491 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3492 sizeof PL_tokenbuf - 1, FALSE);
3493 if (PL_expect == XOPERATOR)
3495 if (!PL_tokenbuf[1]) {
3497 yyerror("Final $ should be \\$ or $name");
3501 /* This kludge not intended to be bulletproof. */
3502 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3503 yylval.opval = newSVOP(OP_CONST, 0,
3504 newSViv(PL_compiling.cop_arybase));
3505 yylval.opval->op_private = OPpCONST_ARYBASE;
3511 if (PL_lex_state == LEX_NORMAL)
3514 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3517 PL_tokenbuf[0] = '@';
3518 if (ckWARN(WARN_SYNTAX)) {
3520 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3523 PL_bufptr = skipspace(PL_bufptr);
3524 while (t < PL_bufend && *t != ']')
3526 Perl_warner(aTHX_ WARN_SYNTAX,
3527 "Multidimensional syntax %.*s not supported",
3528 (t - PL_bufptr) + 1, PL_bufptr);
3532 else if (*s == '{') {
3533 PL_tokenbuf[0] = '%';
3534 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3535 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3537 char tmpbuf[sizeof PL_tokenbuf];
3539 for (t++; isSPACE(*t); t++) ;
3540 if (isIDFIRST_lazy_if(t,UTF)) {
3541 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3542 for (; isSPACE(*t); t++) ;
3543 if (*t == ';' && get_cv(tmpbuf, FALSE))
3544 Perl_warner(aTHX_ WARN_SYNTAX,
3545 "You need to quote \"%s\"", tmpbuf);
3551 PL_expect = XOPERATOR;
3552 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3553 bool islop = (PL_last_lop == PL_oldoldbufptr);
3554 if (!islop || PL_last_lop_op == OP_GREPSTART)
3555 PL_expect = XOPERATOR;
3556 else if (strchr("$@\"'`q", *s))
3557 PL_expect = XTERM; /* e.g. print $fh "foo" */
3558 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3559 PL_expect = XTERM; /* e.g. print $fh &sub */
3560 else if (isIDFIRST_lazy_if(s,UTF)) {
3561 char tmpbuf[sizeof PL_tokenbuf];
3562 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3563 if ((tmp = keyword(tmpbuf, len))) {
3564 /* binary operators exclude handle interpretations */
3576 PL_expect = XTERM; /* e.g. print $fh length() */
3581 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3582 if (gv && GvCVu(gv))
3583 PL_expect = XTERM; /* e.g. print $fh subr() */
3586 else if (isDIGIT(*s))
3587 PL_expect = XTERM; /* e.g. print $fh 3 */
3588 else if (*s == '.' && isDIGIT(s[1]))
3589 PL_expect = XTERM; /* e.g. print $fh .3 */
3590 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3591 PL_expect = XTERM; /* e.g. print $fh -1 */
3592 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3593 PL_expect = XTERM; /* print $fh <<"EOF" */
3595 PL_pending_ident = '$';
3599 if (PL_expect == XOPERATOR)
3601 PL_tokenbuf[0] = '@';
3602 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3603 if (!PL_tokenbuf[1]) {
3605 yyerror("Final @ should be \\@ or @name");
3608 if (PL_lex_state == LEX_NORMAL)
3610 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3612 PL_tokenbuf[0] = '%';
3614 /* Warn about @ where they meant $. */
3615 if (ckWARN(WARN_SYNTAX)) {
3616 if (*s == '[' || *s == '{') {
3618 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3620 if (*t == '}' || *t == ']') {
3622 PL_bufptr = skipspace(PL_bufptr);
3623 Perl_warner(aTHX_ WARN_SYNTAX,
3624 "Scalar value %.*s better written as $%.*s",
3625 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3630 PL_pending_ident = '@';
3633 case '/': /* may either be division or pattern */
3634 case '?': /* may either be conditional or pattern */
3635 if (PL_expect != XOPERATOR) {
3636 /* Disable warning on "study /blah/" */
3637 if (PL_oldoldbufptr == PL_last_uni
3638 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3639 || memNE(PL_last_uni, "study", 5)
3640 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3642 s = scan_pat(s,OP_MATCH);
3643 TERM(sublex_start());
3651 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3652 #ifdef PERL_STRICT_CR
3655 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3657 && (s == PL_linestart || s[-1] == '\n') )
3659 PL_lex_formbrack = 0;
3663 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3669 yylval.ival = OPf_SPECIAL;
3675 if (PL_expect != XOPERATOR)
3680 case '0': case '1': case '2': case '3': case '4':
3681 case '5': case '6': case '7': case '8': case '9':
3682 s = scan_num(s, &yylval);
3683 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3684 "### Saw number in '%s'\n", s);
3686 if (PL_expect == XOPERATOR)
3691 s = scan_str(s,FALSE,FALSE);
3692 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3693 "### Saw string before '%s'\n", s);
3695 if (PL_expect == XOPERATOR) {
3696 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3699 return ','; /* grandfather non-comma-format format */
3705 missingterm((char*)0);
3706 yylval.ival = OP_CONST;
3707 TERM(sublex_start());
3710 s = scan_str(s,FALSE,FALSE);
3711 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3712 "### Saw string before '%s'\n", s);
3714 if (PL_expect == XOPERATOR) {
3715 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3718 return ','; /* grandfather non-comma-format format */
3724 missingterm((char*)0);
3725 yylval.ival = OP_CONST;
3726 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3727 if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) {
3728 yylval.ival = OP_STRINGIFY;
3732 TERM(sublex_start());
3735 s = scan_str(s,FALSE,FALSE);
3736 DEBUG_T( { PerlIO_printf(Perl_debug_log,
3737 "### Saw backtick string before '%s'\n", s);
3739 if (PL_expect == XOPERATOR)
3740 no_op("Backticks",s);
3742 missingterm((char*)0);
3743 yylval.ival = OP_BACKTICK;
3745 TERM(sublex_start());
3749 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3750 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3752 if (PL_expect == XOPERATOR)
3753 no_op("Backslash",s);
3757 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3761 while (isDIGIT(*start) || *start == '_')
3763 if (*start == '.' && isDIGIT(start[1])) {
3764 s = scan_num(s, &yylval);
3767 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3768 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3772 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3775 s = scan_num(s, &yylval);
3782 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3821 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3823 /* Some keywords can be followed by any delimiter, including ':' */
3824 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3825 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3826 (PL_tokenbuf[0] == 'q' &&
3827 strchr("qwxr", PL_tokenbuf[1])))));
3829 /* x::* is just a word, unless x is "CORE" */
3830 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3834 while (d < PL_bufend && isSPACE(*d))
3835 d++; /* no comments skipped here, or s### is misparsed */
3837 /* Is this a label? */
3838 if (!tmp && PL_expect == XSTATE
3839 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3841 yylval.pval = savepv(PL_tokenbuf);
3846 /* Check for keywords */
3847 tmp = keyword(PL_tokenbuf, len);
3849 /* Is this a word before a => operator? */
3850 if (*d == '=' && d[1] == '>') {
3852 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3853 yylval.opval->op_private = OPpCONST_BARE;
3854 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
3855 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
3859 if (tmp < 0) { /* second-class keyword? */
3860 GV *ogv = Nullgv; /* override (winner) */
3861 GV *hgv = Nullgv; /* hidden (loser) */
3862 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3864 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3867 if (GvIMPORTED_CV(gv))
3869 else if (! CvMETHOD(cv))
3873 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3874 (gv = *gvp) != (GV*)&PL_sv_undef &&
3875 GvCVu(gv) && GvIMPORTED_CV(gv))
3881 tmp = 0; /* overridden by import or by GLOBAL */
3884 && -tmp==KEY_lock /* XXX generalizable kludge */
3886 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3888 tmp = 0; /* any sub overrides "weak" keyword */
3890 else { /* no override */
3894 if (ckWARN(WARN_AMBIGUOUS) && hgv
3895 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3896 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3897 "Ambiguous call resolved as CORE::%s(), %s",
3898 GvENAME(hgv), "qualify as such or use &");
3905 default: /* not a keyword */
3908 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3910 /* Get the rest if it looks like a package qualifier */
3912 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3914 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3917 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3918 *s == '\'' ? "'" : "::");
3922 if (PL_expect == XOPERATOR) {
3923 if (PL_bufptr == PL_linestart) {
3924 CopLINE_dec(PL_curcop);
3925 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3926 CopLINE_inc(PL_curcop);
3929 no_op("Bareword",s);
3932 /* Look for a subroutine with this name in current package,
3933 unless name is "Foo::", in which case Foo is a bearword
3934 (and a package name). */
3937 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3939 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3940 Perl_warner(aTHX_ WARN_BAREWORD,
3941 "Bareword \"%s\" refers to nonexistent package",
3944 PL_tokenbuf[len] = '\0';
3951 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3954 /* if we saw a global override before, get the right name */
3957 sv = newSVpvn("CORE::GLOBAL::",14);
3958 sv_catpv(sv,PL_tokenbuf);
3961 sv = newSVpv(PL_tokenbuf,0);
3963 /* Presume this is going to be a bareword of some sort. */
3966 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3967 yylval.opval->op_private = OPpCONST_BARE;
3969 /* And if "Foo::", then that's what it certainly is. */
3974 /* See if it's the indirect object for a list operator. */
3976 if (PL_oldoldbufptr &&
3977 PL_oldoldbufptr < PL_bufptr &&
3978 (PL_oldoldbufptr == PL_last_lop
3979 || PL_oldoldbufptr == PL_last_uni) &&
3980 /* NO SKIPSPACE BEFORE HERE! */
3981 (PL_expect == XREF ||
3982 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3984 bool immediate_paren = *s == '(';
3986 /* (Now we can afford to cross potential line boundary.) */
3989 /* Two barewords in a row may indicate method call. */
3991 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3994 /* If not a declared subroutine, it's an indirect object. */
3995 /* (But it's an indir obj regardless for sort.) */
3997 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
3998 ((!gv || !GvCVu(gv)) &&
3999 (PL_last_lop_op != OP_MAPSTART &&
4000 PL_last_lop_op != OP_GREPSTART))))
4002 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
4008 PL_expect = XOPERATOR;
4011 /* Is this a word before a => operator? */
4012 if (*s == '=' && s[1] == '>') {
4014 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
4015 if (UTF && !IN_BYTE && is_utf8_string((U8*)PL_tokenbuf, len))
4016 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
4020 /* If followed by a paren, it's certainly a subroutine. */
4023 if (gv && GvCVu(gv)) {
4024 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
4025 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
4030 PL_nextval[PL_nexttoke].opval = yylval.opval;
4031 PL_expect = XOPERATOR;
4037 /* If followed by var or block, call it a method (unless sub) */
4039 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
4040 PL_last_lop = PL_oldbufptr;
4041 PL_last_lop_op = OP_METHOD;
4045 /* If followed by a bareword, see if it looks like indir obj. */
4047 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
4050 /* Not a method, so call it a subroutine (if defined) */
4052 if (gv && GvCVu(gv)) {
4054 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
4055 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4056 "Ambiguous use of -%s resolved as -&%s()",
4057 PL_tokenbuf, PL_tokenbuf);
4058 /* Check for a constant sub */
4060 if ((sv = cv_const_sv(cv))) {
4062 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
4063 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
4064 yylval.opval->op_private = 0;
4068 /* Resolve to GV now. */
4069 op_free(yylval.opval);
4070 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
4071 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
4072 PL_last_lop = PL_oldbufptr;
4073 PL_last_lop_op = OP_ENTERSUB;
4074 /* Is there a prototype? */
4077 char *proto = SvPV((SV*)cv, len);
4080 if (strEQ(proto, "$"))
4082 if (*proto == '&' && *s == '{') {
4083 sv_setpv(PL_subname,"__ANON__");
4087 PL_nextval[PL_nexttoke].opval = yylval.opval;
4093 /* Call it a bare word */
4095 if (PL_hints & HINT_STRICT_SUBS)
4096 yylval.opval->op_private |= OPpCONST_STRICT;
4099 if (ckWARN(WARN_RESERVED)) {
4100 if (lastchar != '-') {
4101 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
4103 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
4110 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
4111 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4112 "Operator or semicolon missing before %c%s",
4113 lastchar, PL_tokenbuf);
4114 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4115 "Ambiguous use of %c resolved as operator %c",
4116 lastchar, lastchar);
4122 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4123 newSVpv(CopFILE(PL_curcop),0));
4127 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4128 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
4131 case KEY___PACKAGE__:
4132 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
4134 ? newSVsv(PL_curstname)
4143 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
4144 char *pname = "main";
4145 if (PL_tokenbuf[2] == 'D')
4146 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
4147 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
4150 GvIOp(gv) = newIO();
4151 IoIFP(GvIOp(gv)) = PL_rsfp;
4152 #if defined(HAS_FCNTL) && defined(F_SETFD)
4154 int fd = PerlIO_fileno(PL_rsfp);
4155 fcntl(fd,F_SETFD,fd >= 3);
4158 /* Mark this internal pseudo-handle as clean */
4159 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
4161 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
4162 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
4163 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
4165 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
4166 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4167 /* if the script was opened in binmode, we need to revert
4168 * it to text mode for compatibility; but only iff it has CRs
4169 * XXX this is a questionable hack at best. */
4170 if (PL_bufend-PL_bufptr > 2
4171 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4174 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4175 loc = PerlIO_tell(PL_rsfp);
4176 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4178 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4180 PerlIO_seek(PL_rsfp, loc, 0);
4184 #ifdef PERLIO_LAYERS
4185 if (UTF && !IN_BYTE)
4186 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4199 if (PL_expect == XSTATE) {
4206 if (*s == ':' && s[1] == ':') {
4209 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4210 if (!(tmp = keyword(PL_tokenbuf, len)))
4211 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4225 LOP(OP_ACCEPT,XTERM);
4231 LOP(OP_ATAN2,XTERM);
4237 LOP(OP_BINMODE,XTERM);
4240 LOP(OP_BLESS,XTERM);
4249 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4266 if (!PL_cryptseen) {
4267 PL_cryptseen = TRUE;
4271 LOP(OP_CRYPT,XTERM);
4274 if (ckWARN(WARN_CHMOD)) {
4275 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4276 if (*d != '0' && isDIGIT(*d))
4277 Perl_warner(aTHX_ WARN_CHMOD,
4278 "chmod() mode argument is missing initial 0");
4280 LOP(OP_CHMOD,XTERM);
4283 LOP(OP_CHOWN,XTERM);
4286 LOP(OP_CONNECT,XTERM);
4302 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4306 PL_hints |= HINT_BLOCK_SCOPE;
4316 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4317 LOP(OP_DBMOPEN,XTERM);
4323 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4330 yylval.ival = CopLINE(PL_curcop);
4344 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4345 UNIBRACK(OP_ENTEREVAL);
4360 case KEY_endhostent:
4366 case KEY_endservent:
4369 case KEY_endprotoent:
4380 yylval.ival = CopLINE(PL_curcop);
4382 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4384 if ((PL_bufend - p) >= 3 &&
4385 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4387 else if ((PL_bufend - p) >= 4 &&
4388 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4391 if (isIDFIRST_lazy_if(p,UTF)) {
4392 p = scan_ident(p, PL_bufend,
4393 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4397 Perl_croak(aTHX_ "Missing $ on loop variable");
4402 LOP(OP_FORMLINE,XTERM);
4408 LOP(OP_FCNTL,XTERM);
4414 LOP(OP_FLOCK,XTERM);
4423 LOP(OP_GREPSTART, XREF);
4426 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4441 case KEY_getpriority:
4442 LOP(OP_GETPRIORITY,XTERM);
4444 case KEY_getprotobyname:
4447 case KEY_getprotobynumber:
4448 LOP(OP_GPBYNUMBER,XTERM);
4450 case KEY_getprotoent:
4462 case KEY_getpeername:
4463 UNI(OP_GETPEERNAME);
4465 case KEY_gethostbyname:
4468 case KEY_gethostbyaddr:
4469 LOP(OP_GHBYADDR,XTERM);
4471 case KEY_gethostent:
4474 case KEY_getnetbyname:
4477 case KEY_getnetbyaddr:
4478 LOP(OP_GNBYADDR,XTERM);
4483 case KEY_getservbyname:
4484 LOP(OP_GSBYNAME,XTERM);
4486 case KEY_getservbyport:
4487 LOP(OP_GSBYPORT,XTERM);
4489 case KEY_getservent:
4492 case KEY_getsockname:
4493 UNI(OP_GETSOCKNAME);
4495 case KEY_getsockopt:
4496 LOP(OP_GSOCKOPT,XTERM);
4518 yylval.ival = CopLINE(PL_curcop);
4522 LOP(OP_INDEX,XTERM);
4528 LOP(OP_IOCTL,XTERM);
4540 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4572 LOP(OP_LISTEN,XTERM);
4581 s = scan_pat(s,OP_MATCH);
4582 TERM(sublex_start());
4585 LOP(OP_MAPSTART, XREF);
4588 LOP(OP_MKDIR,XTERM);
4591 LOP(OP_MSGCTL,XTERM);
4594 LOP(OP_MSGGET,XTERM);
4597 LOP(OP_MSGRCV,XTERM);
4600 LOP(OP_MSGSND,XTERM);
4606 if (isIDFIRST_lazy_if(s,UTF)) {
4607 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4608 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4610 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4611 if (!PL_in_my_stash) {
4614 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4622 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4629 if (PL_expect != XSTATE)
4630 yyerror("\"no\" not allowed in expression");
4631 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4632 s = force_version(s);
4637 if (*s == '(' || (s = skipspace(s), *s == '('))
4644 if (isIDFIRST_lazy_if(s,UTF)) {
4646 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4648 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4649 Perl_warner(aTHX_ WARN_PRECEDENCE,
4650 "Precedence problem: open %.*s should be open(%.*s)",
4656 yylval.ival = OP_OR;
4666 LOP(OP_OPEN_DIR,XTERM);
4669 checkcomma(s,PL_tokenbuf,"filehandle");
4673 checkcomma(s,PL_tokenbuf,"filehandle");
4692 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4696 LOP(OP_PIPE_OP,XTERM);
4699 s = scan_str(s,FALSE,FALSE);
4701 missingterm((char*)0);
4702 yylval.ival = OP_CONST;
4703 TERM(sublex_start());
4709 s = scan_str(s,FALSE,FALSE);
4711 missingterm((char*)0);
4713 if (SvCUR(PL_lex_stuff)) {
4716 d = SvPV_force(PL_lex_stuff, len);
4719 for (; isSPACE(*d) && len; --len, ++d) ;
4722 if (!warned && ckWARN(WARN_QW)) {
4723 for (; !isSPACE(*d) && len; --len, ++d) {
4725 Perl_warner(aTHX_ WARN_QW,
4726 "Possible attempt to separate words with commas");
4729 else if (*d == '#') {
4730 Perl_warner(aTHX_ WARN_QW,
4731 "Possible attempt to put comments in qw() list");
4737 for (; !isSPACE(*d) && len; --len, ++d) ;
4739 sv = newSVpvn(b, d-b);
4740 if (DO_UTF8(PL_lex_stuff))
4742 words = append_elem(OP_LIST, words,
4743 newSVOP(OP_CONST, 0, tokeq(sv)));
4747 PL_nextval[PL_nexttoke].opval = words;
4752 SvREFCNT_dec(PL_lex_stuff);
4753 PL_lex_stuff = Nullsv;
4759 s = scan_str(s,FALSE,FALSE);
4761 missingterm((char*)0);
4762 yylval.ival = OP_STRINGIFY;
4763 if (SvIVX(PL_lex_stuff) == '\'')
4764 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4765 TERM(sublex_start());
4768 s = scan_pat(s,OP_QR);
4769 TERM(sublex_start());
4772 s = scan_str(s,FALSE,FALSE);
4774 missingterm((char*)0);
4775 yylval.ival = OP_BACKTICK;
4777 TERM(sublex_start());
4784 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4785 s = force_version(s);
4788 *PL_tokenbuf = '\0';
4789 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4790 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4791 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4793 yyerror("<> should be quotes");
4801 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4805 LOP(OP_RENAME,XTERM);
4814 LOP(OP_RINDEX,XTERM);
4837 LOP(OP_REVERSE,XTERM);
4848 TERM(sublex_start());
4850 TOKEN(1); /* force error */
4859 LOP(OP_SELECT,XTERM);
4865 LOP(OP_SEMCTL,XTERM);
4868 LOP(OP_SEMGET,XTERM);
4871 LOP(OP_SEMOP,XTERM);
4877 LOP(OP_SETPGRP,XTERM);
4879 case KEY_setpriority:
4880 LOP(OP_SETPRIORITY,XTERM);
4882 case KEY_sethostent:
4888 case KEY_setservent:
4891 case KEY_setprotoent:
4901 LOP(OP_SEEKDIR,XTERM);
4903 case KEY_setsockopt:
4904 LOP(OP_SSOCKOPT,XTERM);
4910 LOP(OP_SHMCTL,XTERM);
4913 LOP(OP_SHMGET,XTERM);
4916 LOP(OP_SHMREAD,XTERM);
4919 LOP(OP_SHMWRITE,XTERM);
4922 LOP(OP_SHUTDOWN,XTERM);
4931 LOP(OP_SOCKET,XTERM);
4933 case KEY_socketpair:
4934 LOP(OP_SOCKPAIR,XTERM);
4937 checkcomma(s,PL_tokenbuf,"subroutine name");
4939 if (*s == ';' || *s == ')') /* probably a close */
4940 Perl_croak(aTHX_ "sort is now a reserved word");
4942 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4946 LOP(OP_SPLIT,XTERM);
4949 LOP(OP_SPRINTF,XTERM);
4952 LOP(OP_SPLICE,XTERM);
4967 LOP(OP_SUBSTR,XTERM);
4973 char tmpbuf[sizeof PL_tokenbuf];
4975 expectation attrful;
4976 bool have_name, have_proto;
4981 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4982 (*s == ':' && s[1] == ':'))
4985 attrful = XATTRBLOCK;
4986 /* remember buffer pos'n for later force_word */
4987 tboffset = s - PL_oldbufptr;
4988 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4989 if (strchr(tmpbuf, ':'))
4990 sv_setpv(PL_subname, tmpbuf);
4992 sv_setsv(PL_subname,PL_curstname);
4993 sv_catpvn(PL_subname,"::",2);
4994 sv_catpvn(PL_subname,tmpbuf,len);
5001 Perl_croak(aTHX_ "Missing name in \"my sub\"");
5002 PL_expect = XTERMBLOCK;
5003 attrful = XATTRTERM;
5004 sv_setpv(PL_subname,"?");
5008 if (key == KEY_format) {
5010 PL_lex_formbrack = PL_lex_brackets + 1;
5012 (void) force_word(PL_oldbufptr + tboffset, WORD,
5017 /* Look for a prototype */
5021 s = scan_str(s,FALSE,FALSE);
5023 Perl_croak(aTHX_ "Prototype not terminated");
5025 d = SvPVX(PL_lex_stuff);
5027 for (p = d; *p; ++p) {
5032 SvCUR(PL_lex_stuff) = tmp;
5040 if (*s == ':' && s[1] != ':')
5041 PL_expect = attrful;
5044 PL_nextval[PL_nexttoke].opval =
5045 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
5046 PL_lex_stuff = Nullsv;
5050 sv_setpv(PL_subname,"__ANON__");
5053 (void) force_word(PL_oldbufptr + tboffset, WORD,
5062 LOP(OP_SYSTEM,XREF);
5065 LOP(OP_SYMLINK,XTERM);
5068 LOP(OP_SYSCALL,XTERM);
5071 LOP(OP_SYSOPEN,XTERM);
5074 LOP(OP_SYSSEEK,XTERM);
5077 LOP(OP_SYSREAD,XTERM);
5080 LOP(OP_SYSWRITE,XTERM);
5084 TERM(sublex_start());
5105 LOP(OP_TRUNCATE,XTERM);
5117 yylval.ival = CopLINE(PL_curcop);
5121 yylval.ival = CopLINE(PL_curcop);
5125 LOP(OP_UNLINK,XTERM);
5131 LOP(OP_UNPACK,XTERM);
5134 LOP(OP_UTIME,XTERM);
5137 if (ckWARN(WARN_UMASK)) {
5138 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
5139 if (*d != '0' && isDIGIT(*d))
5140 Perl_warner(aTHX_ WARN_UMASK,
5141 "umask: argument is missing initial 0");
5146 LOP(OP_UNSHIFT,XTERM);
5149 if (PL_expect != XSTATE)
5150 yyerror("\"use\" not allowed in expression");
5152 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
5153 s = force_version(s);
5154 if (*s == ';' || (s = skipspace(s), *s == ';')) {
5155 PL_nextval[PL_nexttoke].opval = Nullop;
5160 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5161 s = force_version(s);
5173 yylval.ival = CopLINE(PL_curcop);
5177 PL_hints |= HINT_BLOCK_SCOPE;
5184 LOP(OP_WAITPID,XTERM);
5192 static char ctl_l[2];
5194 if (ctl_l[0] == '\0')
5195 ctl_l[0] = toCTRL('L');
5196 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5199 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5204 if (PL_expect == XOPERATOR)
5210 yylval.ival = OP_XOR;
5215 TERM(sublex_start());
5220 #pragma segment Main
5224 Perl_keyword(pTHX_ register char *d, I32 len)
5229 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5230 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5231 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5232 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5233 if (strEQ(d,"__END__")) return KEY___END__;
5237 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5242 if (strEQ(d,"and")) return -KEY_and;
5243 if (strEQ(d,"abs")) return -KEY_abs;
5246 if (strEQ(d,"alarm")) return -KEY_alarm;
5247 if (strEQ(d,"atan2")) return -KEY_atan2;
5250 if (strEQ(d,"accept")) return -KEY_accept;
5255 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5258 if (strEQ(d,"bless")) return -KEY_bless;
5259 if (strEQ(d,"bind")) return -KEY_bind;
5260 if (strEQ(d,"binmode")) return -KEY_binmode;
5263 if (strEQ(d,"CORE")) return -KEY_CORE;
5264 if (strEQ(d,"CHECK")) return KEY_CHECK;
5269 if (strEQ(d,"cmp")) return -KEY_cmp;
5270 if (strEQ(d,"chr")) return -KEY_chr;
5271 if (strEQ(d,"cos")) return -KEY_cos;
5274 if (strEQ(d,"chop")) return -KEY_chop;
5277 if (strEQ(d,"close")) return -KEY_close;
5278 if (strEQ(d,"chdir")) return -KEY_chdir;
5279 if (strEQ(d,"chomp")) return -KEY_chomp;
5280 if (strEQ(d,"chmod")) return -KEY_chmod;
5281 if (strEQ(d,"chown")) return -KEY_chown;
5282 if (strEQ(d,"crypt")) return -KEY_crypt;
5285 if (strEQ(d,"chroot")) return -KEY_chroot;
5286 if (strEQ(d,"caller")) return -KEY_caller;
5289 if (strEQ(d,"connect")) return -KEY_connect;
5292 if (strEQ(d,"closedir")) return -KEY_closedir;
5293 if (strEQ(d,"continue")) return -KEY_continue;
5298 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5303 if (strEQ(d,"do")) return KEY_do;
5306 if (strEQ(d,"die")) return -KEY_die;
5309 if (strEQ(d,"dump")) return -KEY_dump;
5312 if (strEQ(d,"delete")) return KEY_delete;
5315 if (strEQ(d,"defined")) return KEY_defined;
5316 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5319 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5324 if (strEQ(d,"END")) return KEY_END;
5329 if (strEQ(d,"eq")) return -KEY_eq;
5332 if (strEQ(d,"eof")) return -KEY_eof;
5333 if (strEQ(d,"exp")) return -KEY_exp;
5336 if (strEQ(d,"else")) return KEY_else;
5337 if (strEQ(d,"exit")) return -KEY_exit;
5338 if (strEQ(d,"eval")) return KEY_eval;
5339 if (strEQ(d,"exec")) return -KEY_exec;
5340 if (strEQ(d,"each")) return -KEY_each;
5343 if (strEQ(d,"elsif")) return KEY_elsif;
5346 if (strEQ(d,"exists")) return KEY_exists;
5347 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5350 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5351 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5354 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5357 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5358 if (strEQ(d,"endservent")) return -KEY_endservent;
5361 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5368 if (strEQ(d,"for")) return KEY_for;
5371 if (strEQ(d,"fork")) return -KEY_fork;
5374 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5375 if (strEQ(d,"flock")) return -KEY_flock;
5378 if (strEQ(d,"format")) return KEY_format;
5379 if (strEQ(d,"fileno")) return -KEY_fileno;
5382 if (strEQ(d,"foreach")) return KEY_foreach;
5385 if (strEQ(d,"formline")) return -KEY_formline;
5390 if (strnEQ(d,"get",3)) {
5395 if (strEQ(d,"ppid")) return -KEY_getppid;
5396 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5399 if (strEQ(d,"pwent")) return -KEY_getpwent;
5400 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5401 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5404 if (strEQ(d,"peername")) return -KEY_getpeername;
5405 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5406 if (strEQ(d,"priority")) return -KEY_getpriority;
5409 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5412 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5416 else if (*d == 'h') {
5417 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5418 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5419 if (strEQ(d,"hostent")) return -KEY_gethostent;
5421 else if (*d == 'n') {
5422 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5423 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5424 if (strEQ(d,"netent")) return -KEY_getnetent;
5426 else if (*d == 's') {
5427 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5428 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5429 if (strEQ(d,"servent")) return -KEY_getservent;
5430 if (strEQ(d,"sockname")) return -KEY_getsockname;
5431 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5433 else if (*d == 'g') {
5434 if (strEQ(d,"grent")) return -KEY_getgrent;
5435 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5436 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5438 else if (*d == 'l') {
5439 if (strEQ(d,"login")) return -KEY_getlogin;
5441 else if (strEQ(d,"c")) return -KEY_getc;
5446 if (strEQ(d,"gt")) return -KEY_gt;
5447 if (strEQ(d,"ge")) return -KEY_ge;
5450 if (strEQ(d,"grep")) return KEY_grep;
5451 if (strEQ(d,"goto")) return KEY_goto;
5452 if (strEQ(d,"glob")) return KEY_glob;
5455 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5460 if (strEQ(d,"hex")) return -KEY_hex;
5463 if (strEQ(d,"INIT")) return KEY_INIT;
5468 if (strEQ(d,"if")) return KEY_if;
5471 if (strEQ(d,"int")) return -KEY_int;
5474 if (strEQ(d,"index")) return -KEY_index;
5475 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5480 if (strEQ(d,"join")) return -KEY_join;
5484 if (strEQ(d,"keys")) return -KEY_keys;
5485 if (strEQ(d,"kill")) return -KEY_kill;
5491 if (strEQ(d,"lt")) return -KEY_lt;
5492 if (strEQ(d,"le")) return -KEY_le;
5493 if (strEQ(d,"lc")) return -KEY_lc;
5496 if (strEQ(d,"log")) return -KEY_log;
5499 if (strEQ(d,"last")) return KEY_last;
5500 if (strEQ(d,"link")) return -KEY_link;
5501 if (strEQ(d,"lock")) return -KEY_lock;
5504 if (strEQ(d,"local")) return KEY_local;
5505 if (strEQ(d,"lstat")) return -KEY_lstat;
5508 if (strEQ(d,"length")) return -KEY_length;
5509 if (strEQ(d,"listen")) return -KEY_listen;
5512 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5515 if (strEQ(d,"localtime")) return -KEY_localtime;
5521 case 1: return KEY_m;
5523 if (strEQ(d,"my")) return KEY_my;
5526 if (strEQ(d,"map")) return KEY_map;
5529 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5532 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5533 if (strEQ(d,"msgget")) return -KEY_msgget;
5534 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5535 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5540 if (strEQ(d,"next")) return KEY_next;
5541 if (strEQ(d,"ne")) return -KEY_ne;
5542 if (strEQ(d,"not")) return -KEY_not;
5543 if (strEQ(d,"no")) return KEY_no;
5548 if (strEQ(d,"or")) return -KEY_or;
5551 if (strEQ(d,"ord")) return -KEY_ord;
5552 if (strEQ(d,"oct")) return -KEY_oct;
5553 if (strEQ(d,"our")) return KEY_our;
5556 if (strEQ(d,"open")) return -KEY_open;
5559 if (strEQ(d,"opendir")) return -KEY_opendir;
5566 if (strEQ(d,"pop")) return -KEY_pop;
5567 if (strEQ(d,"pos")) return KEY_pos;
5570 if (strEQ(d,"push")) return -KEY_push;
5571 if (strEQ(d,"pack")) return -KEY_pack;
5572 if (strEQ(d,"pipe")) return -KEY_pipe;
5575 if (strEQ(d,"print")) return KEY_print;
5578 if (strEQ(d,"printf")) return KEY_printf;
5581 if (strEQ(d,"package")) return KEY_package;
5584 if (strEQ(d,"prototype")) return KEY_prototype;
5589 if (strEQ(d,"q")) return KEY_q;
5590 if (strEQ(d,"qr")) return KEY_qr;
5591 if (strEQ(d,"qq")) return KEY_qq;
5592 if (strEQ(d,"qw")) return KEY_qw;
5593 if (strEQ(d,"qx")) return KEY_qx;
5595 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5600 if (strEQ(d,"ref")) return -KEY_ref;
5603 if (strEQ(d,"read")) return -KEY_read;
5604 if (strEQ(d,"rand")) return -KEY_rand;
5605 if (strEQ(d,"recv")) return -KEY_recv;
5606 if (strEQ(d,"redo")) return KEY_redo;
5609 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5610 if (strEQ(d,"reset")) return -KEY_reset;
5613 if (strEQ(d,"return")) return KEY_return;
5614 if (strEQ(d,"rename")) return -KEY_rename;
5615 if (strEQ(d,"rindex")) return -KEY_rindex;
5618 if (strEQ(d,"require")) return -KEY_require;
5619 if (strEQ(d,"reverse")) return -KEY_reverse;
5620 if (strEQ(d,"readdir")) return -KEY_readdir;
5623 if (strEQ(d,"readlink")) return -KEY_readlink;
5624 if (strEQ(d,"readline")) return -KEY_readline;
5625 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5628 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5634 case 0: return KEY_s;
5636 if (strEQ(d,"scalar")) return KEY_scalar;
5641 if (strEQ(d,"seek")) return -KEY_seek;
5642 if (strEQ(d,"send")) return -KEY_send;
5645 if (strEQ(d,"semop")) return -KEY_semop;
5648 if (strEQ(d,"select")) return -KEY_select;
5649 if (strEQ(d,"semctl")) return -KEY_semctl;
5650 if (strEQ(d,"semget")) return -KEY_semget;
5653 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5654 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5657 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5658 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5661 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5664 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5665 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5666 if (strEQ(d,"setservent")) return -KEY_setservent;
5669 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5670 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5677 if (strEQ(d,"shift")) return -KEY_shift;
5680 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5681 if (strEQ(d,"shmget")) return -KEY_shmget;
5684 if (strEQ(d,"shmread")) return -KEY_shmread;
5687 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5688 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5693 if (strEQ(d,"sin")) return -KEY_sin;
5696 if (strEQ(d,"sleep")) return -KEY_sleep;
5699 if (strEQ(d,"sort")) return KEY_sort;
5700 if (strEQ(d,"socket")) return -KEY_socket;
5701 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5704 if (strEQ(d,"split")) return KEY_split;
5705 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5706 if (strEQ(d,"splice")) return -KEY_splice;
5709 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5712 if (strEQ(d,"srand")) return -KEY_srand;
5715 if (strEQ(d,"stat")) return -KEY_stat;
5716 if (strEQ(d,"study")) return KEY_study;
5719 if (strEQ(d,"substr")) return -KEY_substr;
5720 if (strEQ(d,"sub")) return KEY_sub;
5725 if (strEQ(d,"system")) return -KEY_system;
5728 if (strEQ(d,"symlink")) return -KEY_symlink;
5729 if (strEQ(d,"syscall")) return -KEY_syscall;
5730 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5731 if (strEQ(d,"sysread")) return -KEY_sysread;
5732 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5735 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5744 if (strEQ(d,"tr")) return KEY_tr;
5747 if (strEQ(d,"tie")) return KEY_tie;
5750 if (strEQ(d,"tell")) return -KEY_tell;
5751 if (strEQ(d,"tied")) return KEY_tied;
5752 if (strEQ(d,"time")) return -KEY_time;
5755 if (strEQ(d,"times")) return -KEY_times;
5758 if (strEQ(d,"telldir")) return -KEY_telldir;
5761 if (strEQ(d,"truncate")) return -KEY_truncate;
5768 if (strEQ(d,"uc")) return -KEY_uc;
5771 if (strEQ(d,"use")) return KEY_use;
5774 if (strEQ(d,"undef")) return KEY_undef;
5775 if (strEQ(d,"until")) return KEY_until;
5776 if (strEQ(d,"untie")) return KEY_untie;
5777 if (strEQ(d,"utime")) return -KEY_utime;
5778 if (strEQ(d,"umask")) return -KEY_umask;
5781 if (strEQ(d,"unless")) return KEY_unless;
5782 if (strEQ(d,"unpack")) return -KEY_unpack;
5783 if (strEQ(d,"unlink")) return -KEY_unlink;
5786 if (strEQ(d,"unshift")) return -KEY_unshift;
5787 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5792 if (strEQ(d,"values")) return -KEY_values;
5793 if (strEQ(d,"vec")) return -KEY_vec;
5798 if (strEQ(d,"warn")) return -KEY_warn;
5799 if (strEQ(d,"wait")) return -KEY_wait;
5802 if (strEQ(d,"while")) return KEY_while;
5803 if (strEQ(d,"write")) return -KEY_write;
5806 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5809 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5814 if (len == 1) return -KEY_x;
5815 if (strEQ(d,"xor")) return -KEY_xor;
5818 if (len == 1) return KEY_y;
5827 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5831 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5832 if (ckWARN(WARN_SYNTAX)) {
5834 for (w = s+2; *w && level; w++) {
5841 for (; *w && isSPACE(*w); w++) ;
5842 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5843 Perl_warner(aTHX_ WARN_SYNTAX,
5844 "%s (...) interpreted as function",name);
5847 while (s < PL_bufend && isSPACE(*s))
5851 while (s < PL_bufend && isSPACE(*s))
5853 if (isIDFIRST_lazy_if(s,UTF)) {
5855 while (isALNUM_lazy_if(s,UTF))
5857 while (s < PL_bufend && isSPACE(*s))
5862 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5866 Perl_croak(aTHX_ "No comma allowed after %s", what);
5871 /* Either returns sv, or mortalizes sv and returns a new SV*.
5872 Best used as sv=new_constant(..., sv, ...).
5873 If s, pv are NULL, calls subroutine with one argument,
5874 and type is used with error messages only. */
5877 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5881 HV *table = GvHV(PL_hintgv); /* ^H */
5885 const char *why1, *why2, *why3;
5887 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5890 why2 = strEQ(key,"charnames")
5891 ? "(possibly a missing \"use charnames ...\")"
5893 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
5894 (type ? type: "undef"), why2);
5896 /* This is convoluted and evil ("goto considered harmful")
5897 * but I do not understand the intricacies of all the different
5898 * failure modes of %^H in here. The goal here is to make
5899 * the most probable error message user-friendly. --jhi */
5904 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
5905 (type ? type: "undef"), why1, why2, why3);
5907 yyerror(SvPVX(msg));
5911 cvp = hv_fetch(table, key, strlen(key), FALSE);
5912 if (!cvp || !SvOK(*cvp)) {
5915 why3 = "} is not defined";
5918 sv_2mortal(sv); /* Parent created it permanently */
5921 pv = sv_2mortal(newSVpvn(s, len));
5923 typesv = sv_2mortal(newSVpv(type, 0));
5925 typesv = &PL_sv_undef;
5927 PUSHSTACKi(PERLSI_OVERLOAD);
5939 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5943 /* Check the eval first */
5944 if (!PL_in_eval && SvTRUE(ERRSV)) {
5946 sv_catpv(ERRSV, "Propagated");
5947 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5949 res = SvREFCNT_inc(sv);
5953 (void)SvREFCNT_inc(res);
5962 why1 = "Call to &{$^H{";
5964 why3 = "}} did not return a defined value";
5973 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5975 register char *d = dest;
5976 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5979 Perl_croak(aTHX_ ident_too_long);
5980 if (isALNUM(*s)) /* UTF handled below */
5982 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5987 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5991 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
5992 char *t = s + UTF8SKIP(s);
5993 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
5995 if (d + (t - s) > e)
5996 Perl_croak(aTHX_ ident_too_long);
5997 Copy(s, d, t - s, char);
6010 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
6020 e = d + destlen - 3; /* two-character token, ending NUL */
6022 while (isDIGIT(*s)) {
6024 Perl_croak(aTHX_ ident_too_long);
6031 Perl_croak(aTHX_ ident_too_long);
6032 if (isALNUM(*s)) /* UTF handled below */
6034 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
6039 else if (*s == ':' && s[1] == ':') {
6043 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
6044 char *t = s + UTF8SKIP(s);
6045 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
6047 if (d + (t - s) > e)
6048 Perl_croak(aTHX_ ident_too_long);
6049 Copy(s, d, t - s, char);
6060 if (PL_lex_state != LEX_NORMAL)
6061 PL_lex_state = LEX_INTERPENDMAYBE;
6064 if (*s == '$' && s[1] &&
6065 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
6078 if (*d == '^' && *s && isCONTROLVAR(*s)) {
6083 if (isSPACE(s[-1])) {
6086 if (!SPACE_OR_TAB(ch)) {
6092 if (isIDFIRST_lazy_if(d,UTF)) {
6096 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
6098 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
6101 Copy(s, d, e - s, char);
6106 while ((isALNUM(*s) || *s == ':') && d < e)
6109 Perl_croak(aTHX_ ident_too_long);
6112 while (s < send && SPACE_OR_TAB(*s)) s++;
6113 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
6114 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
6115 const char *brack = *s == '[' ? "[...]" : "{...}";
6116 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6117 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
6118 funny, dest, brack, funny, dest, brack);
6121 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
6125 /* Handle extended ${^Foo} variables
6126 * 1999-02-27 mjd-perl-patch@plover.com */
6127 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6131 while (isALNUM(*s) && d < e) {
6135 Perl_croak(aTHX_ ident_too_long);
6140 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6141 PL_lex_state = LEX_INTERPEND;
6144 if (PL_lex_state == LEX_NORMAL) {
6145 if (ckWARN(WARN_AMBIGUOUS) &&
6146 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
6148 Perl_warner(aTHX_ WARN_AMBIGUOUS,
6149 "Ambiguous use of %c{%s} resolved to %c%s",
6150 funny, dest, funny, dest);
6155 s = bracket; /* let the parser handle it */
6159 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6160 PL_lex_state = LEX_INTERPEND;
6165 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
6170 *pmfl |= PMf_GLOBAL;
6172 *pmfl |= PMf_CONTINUE;
6176 *pmfl |= PMf_MULTILINE;
6178 *pmfl |= PMf_SINGLELINE;
6180 *pmfl |= PMf_EXTENDED;
6184 S_scan_pat(pTHX_ char *start, I32 type)
6189 s = scan_str(start,FALSE,FALSE);
6191 Perl_croak(aTHX_ "Search pattern not terminated");
6193 pm = (PMOP*)newPMOP(type, 0);
6194 if (PL_multi_open == '?')
6195 pm->op_pmflags |= PMf_ONCE;
6197 while (*s && strchr("iomsx", *s))
6198 pmflag(&pm->op_pmflags,*s++);
6201 while (*s && strchr("iogcmsx", *s))
6202 pmflag(&pm->op_pmflags,*s++);
6204 pm->op_pmpermflags = pm->op_pmflags;
6206 PL_lex_op = (OP*)pm;
6207 yylval.ival = OP_MATCH;
6212 S_scan_subst(pTHX_ char *start)
6219 yylval.ival = OP_NULL;
6221 s = scan_str(start,FALSE,FALSE);
6224 Perl_croak(aTHX_ "Substitution pattern not terminated");
6226 if (s[-1] == PL_multi_open)
6229 first_start = PL_multi_start;
6230 s = scan_str(s,FALSE,FALSE);
6233 SvREFCNT_dec(PL_lex_stuff);
6234 PL_lex_stuff = Nullsv;
6236 Perl_croak(aTHX_ "Substitution replacement not terminated");
6238 PL_multi_start = first_start; /* so whole substitution is taken together */
6240 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6246 else if (strchr("iogcmsx", *s))
6247 pmflag(&pm->op_pmflags,*s++);
6254 PL_sublex_info.super_bufptr = s;
6255 PL_sublex_info.super_bufend = PL_bufend;
6257 pm->op_pmflags |= PMf_EVAL;
6258 repl = newSVpvn("",0);
6260 sv_catpv(repl, es ? "eval " : "do ");
6261 sv_catpvn(repl, "{ ", 2);
6262 sv_catsv(repl, PL_lex_repl);
6263 sv_catpvn(repl, " };", 2);
6265 SvREFCNT_dec(PL_lex_repl);
6269 pm->op_pmpermflags = pm->op_pmflags;
6270 PL_lex_op = (OP*)pm;
6271 yylval.ival = OP_SUBST;
6276 S_scan_trans(pTHX_ char *start)
6285 yylval.ival = OP_NULL;
6287 s = scan_str(start,FALSE,FALSE);
6289 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6290 if (s[-1] == PL_multi_open)
6293 s = scan_str(s,FALSE,FALSE);
6296 SvREFCNT_dec(PL_lex_stuff);
6297 PL_lex_stuff = Nullsv;
6299 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6302 complement = del = squash = 0;
6303 while (strchr("cds", *s)) {
6305 complement = OPpTRANS_COMPLEMENT;
6307 del = OPpTRANS_DELETE;
6309 squash = OPpTRANS_SQUASH;
6313 New(803, tbl, complement&&!del?258:256, short);
6314 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6315 o->op_private = del|squash|complement|
6316 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6317 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
6320 yylval.ival = OP_TRANS;
6325 S_scan_heredoc(pTHX_ register char *s)
6328 I32 op_type = OP_SCALAR;
6335 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6339 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6342 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6343 if (*peek && strchr("`'\"",*peek)) {
6346 s = delimcpy(d, e, s, PL_bufend, term, &len);
6356 if (!isALNUM_lazy_if(s,UTF))
6357 deprecate("bare << to mean <<\"\"");
6358 for (; isALNUM_lazy_if(s,UTF); s++) {
6363 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6364 Perl_croak(aTHX_ "Delimiter for here document is too long");
6367 len = d - PL_tokenbuf;
6368 #ifndef PERL_STRICT_CR
6369 d = strchr(s, '\r');
6373 while (s < PL_bufend) {
6379 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6388 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6393 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6394 herewas = newSVpvn(s,PL_bufend-s);
6396 s--, herewas = newSVpvn(s,d-s);
6397 s += SvCUR(herewas);
6399 tmpstr = NEWSV(87,79);
6400 sv_upgrade(tmpstr, SVt_PVIV);
6405 else if (term == '`') {
6406 op_type = OP_BACKTICK;
6407 SvIVX(tmpstr) = '\\';
6411 PL_multi_start = CopLINE(PL_curcop);
6412 PL_multi_open = PL_multi_close = '<';
6413 term = *PL_tokenbuf;
6414 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6415 char *bufptr = PL_sublex_info.super_bufptr;
6416 char *bufend = PL_sublex_info.super_bufend;
6417 char *olds = s - SvCUR(herewas);
6418 s = strchr(bufptr, '\n');
6422 while (s < bufend &&
6423 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6425 CopLINE_inc(PL_curcop);
6428 CopLINE_set(PL_curcop, PL_multi_start);
6429 missingterm(PL_tokenbuf);
6431 sv_setpvn(herewas,bufptr,d-bufptr+1);
6432 sv_setpvn(tmpstr,d+1,s-d);
6434 sv_catpvn(herewas,s,bufend-s);
6435 (void)strcpy(bufptr,SvPVX(herewas));
6442 while (s < PL_bufend &&
6443 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6445 CopLINE_inc(PL_curcop);
6447 if (s >= PL_bufend) {
6448 CopLINE_set(PL_curcop, PL_multi_start);
6449 missingterm(PL_tokenbuf);
6451 sv_setpvn(tmpstr,d+1,s-d);
6453 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6455 sv_catpvn(herewas,s,PL_bufend-s);
6456 sv_setsv(PL_linestr,herewas);
6457 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6458 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6459 PL_last_lop = PL_last_uni = Nullch;
6462 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6463 while (s >= PL_bufend) { /* multiple line string? */
6465 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6466 CopLINE_set(PL_curcop, PL_multi_start);
6467 missingterm(PL_tokenbuf);
6469 CopLINE_inc(PL_curcop);
6470 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6471 PL_last_lop = PL_last_uni = Nullch;
6472 #ifndef PERL_STRICT_CR
6473 if (PL_bufend - PL_linestart >= 2) {
6474 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6475 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6477 PL_bufend[-2] = '\n';
6479 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6481 else if (PL_bufend[-1] == '\r')
6482 PL_bufend[-1] = '\n';
6484 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6485 PL_bufend[-1] = '\n';
6487 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6488 SV *sv = NEWSV(88,0);
6490 sv_upgrade(sv, SVt_PVMG);
6491 sv_setsv(sv,PL_linestr);
6492 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6494 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6497 sv_catsv(PL_linestr,herewas);
6498 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6502 sv_catsv(tmpstr,PL_linestr);
6507 PL_multi_end = CopLINE(PL_curcop);
6508 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6509 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6510 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6512 SvREFCNT_dec(herewas);
6513 if (UTF && !IN_BYTE && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
6515 PL_lex_stuff = tmpstr;
6516 yylval.ival = op_type;
6521 takes: current position in input buffer
6522 returns: new position in input buffer
6523 side-effects: yylval and lex_op are set.
6528 <FH> read from filehandle
6529 <pkg::FH> read from package qualified filehandle
6530 <pkg'FH> read from package qualified filehandle
6531 <$fh> read from filehandle in $fh
6537 S_scan_inputsymbol(pTHX_ char *start)
6539 register char *s = start; /* current position in buffer */
6545 d = PL_tokenbuf; /* start of temp holding space */
6546 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6547 end = strchr(s, '\n');
6550 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6552 /* die if we didn't have space for the contents of the <>,
6553 or if it didn't end, or if we see a newline
6556 if (len >= sizeof PL_tokenbuf)
6557 Perl_croak(aTHX_ "Excessively long <> operator");
6559 Perl_croak(aTHX_ "Unterminated <> operator");
6564 Remember, only scalar variables are interpreted as filehandles by
6565 this code. Anything more complex (e.g., <$fh{$num}>) will be
6566 treated as a glob() call.
6567 This code makes use of the fact that except for the $ at the front,
6568 a scalar variable and a filehandle look the same.
6570 if (*d == '$' && d[1]) d++;
6572 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6573 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6576 /* If we've tried to read what we allow filehandles to look like, and
6577 there's still text left, then it must be a glob() and not a getline.
6578 Use scan_str to pull out the stuff between the <> and treat it
6579 as nothing more than a string.
6582 if (d - PL_tokenbuf != len) {
6583 yylval.ival = OP_GLOB;
6585 s = scan_str(start,FALSE,FALSE);
6587 Perl_croak(aTHX_ "Glob not terminated");
6591 /* we're in a filehandle read situation */
6594 /* turn <> into <ARGV> */
6596 (void)strcpy(d,"ARGV");
6598 /* if <$fh>, create the ops to turn the variable into a
6604 /* try to find it in the pad for this block, otherwise find
6605 add symbol table ops
6607 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6608 OP *o = newOP(OP_PADSV, 0);
6610 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6613 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6614 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6615 newUNOP(OP_RV2SV, 0,
6616 newGVOP(OP_GV, 0, gv)));
6618 PL_lex_op->op_flags |= OPf_SPECIAL;
6619 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6620 yylval.ival = OP_NULL;
6623 /* If it's none of the above, it must be a literal filehandle
6624 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6626 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6627 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6628 yylval.ival = OP_NULL;
6637 takes: start position in buffer
6638 keep_quoted preserve \ on the embedded delimiter(s)
6639 keep_delims preserve the delimiters around the string
6640 returns: position to continue reading from buffer
6641 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6642 updates the read buffer.
6644 This subroutine pulls a string out of the input. It is called for:
6645 q single quotes q(literal text)
6646 ' single quotes 'literal text'
6647 qq double quotes qq(interpolate $here please)
6648 " double quotes "interpolate $here please"
6649 qx backticks qx(/bin/ls -l)
6650 ` backticks `/bin/ls -l`
6651 qw quote words @EXPORT_OK = qw( func() $spam )
6652 m// regexp match m/this/
6653 s/// regexp substitute s/this/that/
6654 tr/// string transliterate tr/this/that/
6655 y/// string transliterate y/this/that/
6656 ($*@) sub prototypes sub foo ($)
6657 (stuff) sub attr parameters sub foo : attr(stuff)
6658 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6660 In most of these cases (all but <>, patterns and transliterate)
6661 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6662 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6663 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6666 It skips whitespace before the string starts, and treats the first
6667 character as the delimiter. If the delimiter is one of ([{< then
6668 the corresponding "close" character )]}> is used as the closing
6669 delimiter. It allows quoting of delimiters, and if the string has
6670 balanced delimiters ([{<>}]) it allows nesting.
6672 On success, the SV with the resulting string is put into lex_stuff or,
6673 if that is already non-NULL, into lex_repl. The second case occurs only
6674 when parsing the RHS of the special constructs s/// and tr/// (y///).
6675 For convenience, the terminating delimiter character is stuffed into
6680 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6682 SV *sv; /* scalar value: string */
6683 char *tmps; /* temp string, used for delimiter matching */
6684 register char *s = start; /* current position in the buffer */
6685 register char term; /* terminating character */
6686 register char *to; /* current position in the sv's data */
6687 I32 brackets = 1; /* bracket nesting level */
6688 bool has_utf8 = FALSE; /* is there any utf8 content? */
6690 /* skip space before the delimiter */
6694 /* mark where we are, in case we need to report errors */
6697 /* after skipping whitespace, the next character is the terminator */
6699 if (!UTF8_IS_INVARIANT((U8)term) && UTF)
6702 /* mark where we are */
6703 PL_multi_start = CopLINE(PL_curcop);
6704 PL_multi_open = term;
6706 /* find corresponding closing delimiter */
6707 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6709 PL_multi_close = term;
6711 /* create a new SV to hold the contents. 87 is leak category, I'm
6712 assuming. 79 is the SV's initial length. What a random number. */
6714 sv_upgrade(sv, SVt_PVIV);
6716 (void)SvPOK_only(sv); /* validate pointer */
6718 /* move past delimiter and try to read a complete string */
6720 sv_catpvn(sv, s, 1);
6723 /* extend sv if need be */
6724 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6725 /* set 'to' to the next character in the sv's string */
6726 to = SvPVX(sv)+SvCUR(sv);
6728 /* if open delimiter is the close delimiter read unbridle */
6729 if (PL_multi_open == PL_multi_close) {
6730 for (; s < PL_bufend; s++,to++) {
6731 /* embedded newlines increment the current line number */
6732 if (*s == '\n' && !PL_rsfp)
6733 CopLINE_inc(PL_curcop);
6734 /* handle quoted delimiters */
6735 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6736 if (!keep_quoted && s[1] == term)
6738 /* any other quotes are simply copied straight through */
6742 /* terminate when run out of buffer (the for() condition), or
6743 have found the terminator */
6744 else if (*s == term)
6746 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6752 /* if the terminator isn't the same as the start character (e.g.,
6753 matched brackets), we have to allow more in the quoting, and
6754 be prepared for nested brackets.
6757 /* read until we run out of string, or we find the terminator */
6758 for (; s < PL_bufend; s++,to++) {
6759 /* embedded newlines increment the line count */
6760 if (*s == '\n' && !PL_rsfp)
6761 CopLINE_inc(PL_curcop);
6762 /* backslashes can escape the open or closing characters */
6763 if (*s == '\\' && s+1 < PL_bufend) {
6765 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6770 /* allow nested opens and closes */
6771 else if (*s == PL_multi_close && --brackets <= 0)
6773 else if (*s == PL_multi_open)
6775 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
6780 /* terminate the copied string and update the sv's end-of-string */
6782 SvCUR_set(sv, to - SvPVX(sv));
6785 * this next chunk reads more into the buffer if we're not done yet
6789 break; /* handle case where we are done yet :-) */
6791 #ifndef PERL_STRICT_CR
6792 if (to - SvPVX(sv) >= 2) {
6793 if ((to[-2] == '\r' && to[-1] == '\n') ||
6794 (to[-2] == '\n' && to[-1] == '\r'))
6798 SvCUR_set(sv, to - SvPVX(sv));
6800 else if (to[-1] == '\r')
6803 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6807 /* if we're out of file, or a read fails, bail and reset the current
6808 line marker so we can report where the unterminated string began
6811 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6813 CopLINE_set(PL_curcop, PL_multi_start);
6816 /* we read a line, so increment our line counter */
6817 CopLINE_inc(PL_curcop);
6819 /* update debugger info */
6820 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6821 SV *sv = NEWSV(88,0);
6823 sv_upgrade(sv, SVt_PVMG);
6824 sv_setsv(sv,PL_linestr);
6825 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6828 /* having changed the buffer, we must update PL_bufend */
6829 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6830 PL_last_lop = PL_last_uni = Nullch;
6833 /* at this point, we have successfully read the delimited string */
6836 sv_catpvn(sv, s, 1);
6839 PL_multi_end = CopLINE(PL_curcop);
6842 /* if we allocated too much space, give some back */
6843 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6844 SvLEN_set(sv, SvCUR(sv) + 1);
6845 Renew(SvPVX(sv), SvLEN(sv), char);
6848 /* decide whether this is the first or second quoted string we've read
6861 takes: pointer to position in buffer
6862 returns: pointer to new position in buffer
6863 side-effects: builds ops for the constant in yylval.op
6865 Read a number in any of the formats that Perl accepts:
6867 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6868 [\d_]+(\.[\d_]*)?[Ee](\d+)
6870 Underbars (_) are allowed in decimal numbers. If -w is on,
6871 underbars before a decimal point must be at three digit intervals.
6873 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6876 If it reads a number without a decimal point or an exponent, it will
6877 try converting the number to an integer and see if it can do so
6878 without loss of precision.
6882 Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
6884 register char *s = start; /* current position in buffer */
6885 register char *d; /* destination in temp buffer */
6886 register char *e; /* end of temp buffer */
6887 NV nv; /* number read, as a double */
6888 SV *sv = Nullsv; /* place to put the converted number */
6889 bool floatit; /* boolean: int or float? */
6890 char *lastub = 0; /* position of last underbar */
6891 static char number_too_long[] = "Number too long";
6893 /* We use the first character to decide what type of number this is */
6897 Perl_croak(aTHX_ "panic: scan_num");
6899 /* if it starts with a 0, it could be an octal number, a decimal in
6900 0.13 disguise, or a hexadecimal number, or a binary number. */
6904 u holds the "number so far"
6905 shift the power of 2 of the base
6906 (hex == 4, octal == 3, binary == 1)
6907 overflowed was the number more than we can hold?
6909 Shift is used when we add a digit. It also serves as an "are
6910 we in octal/hex/binary?" indicator to disallow hex characters
6916 bool overflowed = FALSE;
6917 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6918 static char* bases[5] = { "", "binary", "", "octal",
6920 static char* Bases[5] = { "", "Binary", "", "Octal",
6922 static char *maxima[5] = { "",
6923 "0b11111111111111111111111111111111",
6927 char *base, *Base, *max;
6933 } else if (s[1] == 'b') {
6937 /* check for a decimal in disguise */
6938 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6940 /* so it must be octal */
6944 base = bases[shift];
6945 Base = Bases[shift];
6946 max = maxima[shift];
6948 /* read the rest of the number */
6950 /* x is used in the overflow test,
6951 b is the digit we're adding on. */
6956 /* if we don't mention it, we're done */
6965 /* 8 and 9 are not octal */
6968 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6972 case '2': case '3': case '4':
6973 case '5': case '6': case '7':
6975 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6979 b = *s++ & 15; /* ASCII digit -> value of digit */
6983 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6984 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6985 /* make sure they said 0x */
6990 /* Prepare to put the digit we have onto the end
6991 of the number so far. We check for overflows.
6996 x = u << shift; /* make room for the digit */
6998 if ((x >> shift) != u
6999 && !(PL_hints & HINT_NEW_BINARY)) {
7002 if (ckWARN_d(WARN_OVERFLOW))
7003 Perl_warner(aTHX_ WARN_OVERFLOW,
7004 "Integer overflow in %s number",
7007 u = x | b; /* add the digit to the end */
7010 n *= nvshift[shift];
7011 /* If an NV has not enough bits in its
7012 * mantissa to represent an UV this summing of
7013 * small low-order numbers is a waste of time
7014 * (because the NV cannot preserve the
7015 * low-order bits anyway): we could just
7016 * remember when did we overflow and in the
7017 * end just multiply n by the right
7025 /* if we get here, we had success: make a scalar value from
7031 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7032 Perl_warner(aTHX_ WARN_PORTABLE,
7033 "%s number > %s non-portable",
7039 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7040 Perl_warner(aTHX_ WARN_PORTABLE,
7041 "%s number > %s non-portable",
7046 if (PL_hints & HINT_NEW_BINARY)
7047 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
7052 handle decimal numbers.
7053 we're also sent here when we read a 0 as the first digit
7055 case '1': case '2': case '3': case '4': case '5':
7056 case '6': case '7': case '8': case '9': case '.':
7059 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
7062 /* read next group of digits and _ and copy into d */
7063 while (isDIGIT(*s) || *s == '_') {
7064 /* skip underscores, checking for misplaced ones
7068 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
7069 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7073 /* check for end of fixed-length buffer */
7075 Perl_croak(aTHX_ number_too_long);
7076 /* if we're ok, copy the character */
7081 /* final misplaced underbar check */
7082 if (lastub && s - lastub != 3) {
7083 if (ckWARN(WARN_SYNTAX))
7084 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7087 /* read a decimal portion if there is one. avoid
7088 3..5 being interpreted as the number 3. followed
7091 if (*s == '.' && s[1] != '.') {
7095 /* copy, ignoring underbars, until we run out of
7096 digits. Note: no misplaced underbar checks!
7098 for (; isDIGIT(*s) || *s == '_'; s++) {
7099 /* fixed length buffer check */
7101 Perl_croak(aTHX_ number_too_long);
7105 if (*s == '.' && isDIGIT(s[1])) {
7106 /* oops, it's really a v-string, but without the "v" */
7112 /* read exponent part, if present */
7113 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
7117 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
7118 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
7120 /* allow positive or negative exponent */
7121 if (*s == '+' || *s == '-')
7124 /* read digits of exponent (no underbars :-) */
7125 while (isDIGIT(*s)) {
7127 Perl_croak(aTHX_ number_too_long);
7132 /* terminate the string */
7135 /* make an sv from the string */
7138 #if defined(Strtol) && defined(Strtoul)
7141 strtol/strtoll sets errno to ERANGE if the number is too big
7142 for an integer. We try to do an integer conversion first
7143 if no characters indicating "float" have been found.
7150 if (*PL_tokenbuf == '-')
7151 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
7153 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
7155 floatit = TRUE; /* Probably just too large. */
7156 else if (*PL_tokenbuf == '-')
7158 else if (uv <= IV_MAX)
7159 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7164 nv = Atof(PL_tokenbuf);
7169 No working strtou?ll?.
7171 Unfortunately atol() doesn't do range checks (returning
7172 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7173 everywhere [1], so we cannot use use atol() (or atoll()).
7174 If we could, they would be used, as Atol(), very much like
7175 Strtol() and Strtoul() are used above.
7177 [1] XXX Configure test needed to check for atol()
7178 (and atoll()) overflow behaviour XXX
7182 We need to do this the hard way. */
7184 nv = Atof(PL_tokenbuf);
7186 /* See if we can make do with an integer value without loss of
7187 precision. We use U_V to cast to a UV, because some
7188 compilers have issues. Then we try casting it back and see
7189 if it was the same [1]. We only do this if we know we
7190 specifically read an integer. If floatit is true, then we
7191 don't need to do the conversion at all.
7193 [1] Note that this is lossy if our NVs cannot preserve our
7194 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7195 and NV_PRESERVES_UV_BITS (a number), but in general we really
7196 do hope all such potentially lossy platforms have strtou?ll?
7197 to do a lossless IV/UV conversion.
7199 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7200 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7201 as NV_DIG and NV_MANT_DIG)?
7207 if (!floatit && (NV)uv == nv) {
7209 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7217 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7218 (PL_hints & HINT_NEW_INTEGER) )
7219 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7220 (floatit ? "float" : "integer"),
7224 /* if it starts with a v, it could be a v-string */
7230 while (isDIGIT(*pos) || *pos == '_')
7232 if (!isALPHA(*pos)) {
7234 U8 tmpbuf[UTF8_MAXLEN+1];
7236 s++; /* get past 'v' */
7239 sv_setpvn(sv, "", 0);
7242 if (*s == '0' && isDIGIT(s[1]))
7243 yyerror("Octal number in vector unsupported");
7246 /* this is atoi() that tolerates underscores */
7249 while (--end >= s) {
7254 rev += (*end - '0') * mult;
7256 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7257 Perl_warner(aTHX_ WARN_OVERFLOW,
7258 "Integer overflow in decimal number");
7261 /* Append native character for the rev point */
7262 tmpend = uvchr_to_utf8(tmpbuf, rev);
7265 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7266 if (*pos == '.' && isDIGIT(pos[1]))
7272 while (isDIGIT(*pos) || *pos == '_')
7278 /* if (revmax > 127) { */
7281 sv_utf8_downgrade(sv, TRUE);
7288 /* make the op for the constant and return */
7291 lvalp->opval = newSVOP(OP_CONST, 0, sv);
7293 lvalp->opval = Nullop;
7299 S_scan_formline(pTHX_ register char *s)
7303 SV *stuff = newSVpvn("",0);
7304 bool needargs = FALSE;
7307 if (*s == '.' || *s == /*{*/'}') {
7309 #ifdef PERL_STRICT_CR
7310 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7312 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7314 if (*t == '\n' || t == PL_bufend)
7317 if (PL_in_eval && !PL_rsfp) {
7318 eol = strchr(s,'\n');
7323 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7325 for (t = s; t < eol; t++) {
7326 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7328 goto enough; /* ~~ must be first line in formline */
7330 if (*t == '@' || *t == '^')
7333 sv_catpvn(stuff, s, eol-s);
7334 #ifndef PERL_STRICT_CR
7335 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7336 char *end = SvPVX(stuff) + SvCUR(stuff);
7345 s = filter_gets(PL_linestr, PL_rsfp, 0);
7346 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7347 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7348 PL_last_lop = PL_last_uni = Nullch;
7351 yyerror("Format not terminated");
7361 PL_lex_state = LEX_NORMAL;
7362 PL_nextval[PL_nexttoke].ival = 0;
7366 PL_lex_state = LEX_FORMLINE;
7367 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7369 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7373 SvREFCNT_dec(stuff);
7374 PL_lex_formbrack = 0;
7385 PL_cshlen = strlen(PL_cshname);
7390 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7392 I32 oldsavestack_ix = PL_savestack_ix;
7393 CV* outsidecv = PL_compcv;
7397 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7399 SAVEI32(PL_subline);
7400 save_item(PL_subname);
7403 SAVESPTR(PL_comppad_name);
7404 SAVESPTR(PL_compcv);
7405 SAVEI32(PL_comppad_name_fill);
7406 SAVEI32(PL_min_intro_pending);
7407 SAVEI32(PL_max_intro_pending);
7408 SAVEI32(PL_pad_reset_pending);
7410 PL_compcv = (CV*)NEWSV(1104,0);
7411 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7412 CvFLAGS(PL_compcv) |= flags;
7414 PL_comppad = newAV();
7415 av_push(PL_comppad, Nullsv);
7416 PL_curpad = AvARRAY(PL_comppad);
7417 PL_comppad_name = newAV();
7418 PL_comppad_name_fill = 0;
7419 PL_min_intro_pending = 0;
7421 PL_subline = CopLINE(PL_curcop);
7423 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7424 PL_curpad[0] = (SV*)newAV();
7425 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7426 #endif /* USE_THREADS */
7428 comppadlist = newAV();
7429 AvREAL_off(comppadlist);
7430 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7431 av_store(comppadlist, 1, (SV*)PL_comppad);
7433 CvPADLIST(PL_compcv) = comppadlist;
7434 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7436 CvOWNER(PL_compcv) = 0;
7437 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7438 MUTEX_INIT(CvMUTEXP(PL_compcv));
7439 #endif /* USE_THREADS */
7441 return oldsavestack_ix;
7445 #pragma segment Perl_yylex
7448 Perl_yywarn(pTHX_ char *s)
7450 PL_in_eval |= EVAL_WARNONLY;
7452 PL_in_eval &= ~EVAL_WARNONLY;
7457 Perl_yyerror(pTHX_ char *s)
7460 char *context = NULL;
7464 if (!yychar || (yychar == ';' && !PL_rsfp))
7466 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7467 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7468 while (isSPACE(*PL_oldoldbufptr))
7470 context = PL_oldoldbufptr;
7471 contlen = PL_bufptr - PL_oldoldbufptr;
7473 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7474 PL_oldbufptr != PL_bufptr) {
7475 while (isSPACE(*PL_oldbufptr))
7477 context = PL_oldbufptr;
7478 contlen = PL_bufptr - PL_oldbufptr;
7480 else if (yychar > 255)
7481 where = "next token ???";
7482 #ifdef USE_PURE_BISON
7483 /* GNU Bison sets the value -2 */
7484 else if (yychar == -2) {
7486 else if ((yychar & 127) == 127) {
7488 if (PL_lex_state == LEX_NORMAL ||
7489 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7490 where = "at end of line";
7491 else if (PL_lex_inpat)
7492 where = "within pattern";
7494 where = "within string";
7497 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7499 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7500 else if (isPRINT_LC(yychar))
7501 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7503 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7504 where = SvPVX(where_sv);
7506 msg = sv_2mortal(newSVpv(s, 0));
7507 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7508 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7510 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7512 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7513 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7514 Perl_sv_catpvf(aTHX_ msg,
7515 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7516 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7519 if (PL_in_eval & EVAL_WARNONLY)
7520 Perl_warn(aTHX_ "%"SVf, msg);
7523 if (PL_error_count >= 10) {
7524 if (PL_in_eval && SvCUR(ERRSV))
7525 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7526 ERRSV, CopFILE(PL_curcop));
7528 Perl_croak(aTHX_ "%s has too many errors.\n",
7529 CopFILE(PL_curcop));
7532 PL_in_my_stash = Nullhv;
7536 #pragma segment Main
7540 S_swallow_bom(pTHX_ U8 *s)
7543 slen = SvCUR(PL_linestr);
7547 /* UTF-16 little-endian */
7548 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7549 Perl_croak(aTHX_ "Unsupported script encoding");
7550 #ifndef PERL_NO_UTF16_FILTER
7551 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7553 if (PL_bufend > (char*)s) {
7557 filter_add(utf16rev_textfilter, NULL);
7558 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7559 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7560 PL_bufend - (char*)s - 1,
7562 Copy(news, s, newlen, U8);
7563 SvCUR_set(PL_linestr, newlen);
7564 PL_bufend = SvPVX(PL_linestr) + newlen;
7565 news[newlen++] = '\0';
7569 Perl_croak(aTHX_ "Unsupported script encoding");
7574 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7575 #ifndef PERL_NO_UTF16_FILTER
7576 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7578 if (PL_bufend > (char *)s) {
7582 filter_add(utf16_textfilter, NULL);
7583 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7584 PL_bufend = (char*)utf16_to_utf8(s, news,
7585 PL_bufend - (char*)s,
7587 Copy(news, s, newlen, U8);
7588 SvCUR_set(PL_linestr, newlen);
7589 PL_bufend = SvPVX(PL_linestr) + newlen;
7590 news[newlen++] = '\0';
7594 Perl_croak(aTHX_ "Unsupported script encoding");
7599 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7600 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7605 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7606 s[2] == 0xFE && s[3] == 0xFF)
7608 Perl_croak(aTHX_ "Unsupported script encoding");
7620 * Restore a source filter.
7624 restore_rsfp(pTHXo_ void *f)
7626 PerlIO *fp = (PerlIO*)f;
7628 if (PL_rsfp == PerlIO_stdin())
7629 PerlIO_clearerr(PL_rsfp);
7630 else if (PL_rsfp && (PL_rsfp != fp))
7631 PerlIO_close(PL_rsfp);
7635 #ifndef PERL_NO_UTF16_FILTER
7637 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7639 I32 count = FILTER_READ(idx+1, sv, maxlen);
7644 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7645 if (!*SvPV_nolen(sv))
7646 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7649 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7650 sv_usepvn(sv, (char*)tmps, tend - tmps);
7656 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7658 I32 count = FILTER_READ(idx+1, sv, maxlen);
7663 if (!*SvPV_nolen(sv))
7664 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7667 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7668 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7669 sv_usepvn(sv, (char*)tmps, tend - tmps);