3 * Copyright (c) 1991-2000, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
15 * This file is the lexer for Perl. It's closely linked to the
18 * The main routine is yylex(), which returns the next token.
22 #define PERL_IN_TOKE_C
25 #define yychar PL_yychar
26 #define yylval PL_yylval
28 static char ident_too_long[] = "Identifier too long";
30 static void restore_rsfp(pTHXo_ void *f);
31 #ifndef PERL_NO_UTF16_FILTER
32 static I32 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
33 static I32 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen);
36 #define XFAKEBRACK 128
39 /*#define UTF (SvUTF8(PL_linestr) && !(PL_hints & HINT_BYTE))*/
40 #define UTF (PL_hints & HINT_UTF8)
42 /* In variables name $^X, these are the legal values for X.
43 * 1999-02-27 mjd-perl-patch@plover.com */
44 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
46 /* On MacOS, respect nonbreaking spaces */
47 #ifdef MACOS_TRADITIONAL
48 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
50 #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
53 /* LEX_* are values for PL_lex_state, the state of the lexer.
54 * They are arranged oddly so that the guard on the switch statement
55 * can get by with a single comparison (if the compiler is smart enough).
58 /* #define LEX_NOTPARSING 11 is done in perl.h. */
61 #define LEX_INTERPNORMAL 9
62 #define LEX_INTERPCASEMOD 8
63 #define LEX_INTERPPUSH 7
64 #define LEX_INTERPSTART 6
65 #define LEX_INTERPEND 5
66 #define LEX_INTERPENDMAYBE 4
67 #define LEX_INTERPCONCAT 3
68 #define LEX_INTERPCONST 2
69 #define LEX_FORMLINE 1
70 #define LEX_KNOWNEXT 0
72 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
74 # include <unistd.h> /* Needed for execv() */
83 YYSTYPE* yylval_pointer = NULL;
84 int* yychar_pointer = NULL;
87 # define yylval (*yylval_pointer)
88 # define yychar (*yychar_pointer)
89 # define PERL_YYLEX_PARAM yylval_pointer,yychar_pointer
91 # define yylex() Perl_yylex(aTHX_ yylval_pointer, yychar_pointer)
96 /* CLINE is a macro that ensures PL_copline has a sane value */
101 #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
104 * Convenience functions to return different tokens and prime the
105 * lexer for the next token. They all take an argument.
107 * TOKEN : generic token (used for '(', DOLSHARP, etc)
108 * OPERATOR : generic operator
109 * AOPERATOR : assignment operator
110 * PREBLOCK : beginning the block after an if, while, foreach, ...
111 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
112 * PREREF : *EXPR where EXPR is not a simple identifier
113 * TERM : expression term
114 * LOOPX : loop exiting command (goto, last, dump, etc)
115 * FTST : file test operator
116 * FUN0 : zero-argument function
117 * FUN1 : not used, except for not, which isn't a UNIOP
118 * BOop : bitwise or or xor
120 * SHop : shift operator
121 * PWop : power operator
122 * PMop : pattern-matching operator
123 * Aop : addition-level operator
124 * Mop : multiplication-level operator
125 * Eop : equality-testing operator
126 * Rop : relational operator <= != gt
128 * Also see LOP and lop() below.
131 #define TOKEN(retval) return (PL_bufptr = s,(int)retval)
132 #define OPERATOR(retval) return (PL_expect = XTERM,PL_bufptr = s,(int)retval)
133 #define AOPERATOR(retval) return ao((PL_expect = XTERM,PL_bufptr = s,(int)retval))
134 #define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
135 #define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
136 #define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s,(int)retval)
137 #define TERM(retval) return (CLINE, PL_expect = XOPERATOR,PL_bufptr = s,(int)retval)
138 #define LOOPX(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
139 #define FTST(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
140 #define FUN0(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
141 #define FUN1(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
142 #define BOop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
143 #define BAop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
144 #define SHop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
145 #define PWop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
146 #define PMop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
147 #define Aop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
148 #define Mop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
149 #define Eop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
150 #define Rop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
152 /* This bit of chicanery makes a unary function followed by
153 * a parenthesis into a function with one argument, highest precedence.
155 #define UNI(f) return(yylval.ival = f, \
158 PL_last_uni = PL_oldbufptr, \
159 PL_last_lop_op = f, \
160 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
162 #define UNIBRACK(f) return(yylval.ival = f, \
164 PL_last_uni = PL_oldbufptr, \
165 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
167 /* grandfather return to old style */
168 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
173 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
174 * into an OP_ANDASSIGN or OP_ORASSIGN
178 S_ao(pTHX_ int toketype)
180 if (*PL_bufptr == '=') {
182 if (toketype == ANDAND)
183 yylval.ival = OP_ANDASSIGN;
184 else if (toketype == OROR)
185 yylval.ival = OP_ORASSIGN;
193 * When Perl expects an operator and finds something else, no_op
194 * prints the warning. It always prints "<something> found where
195 * operator expected. It prints "Missing semicolon on previous line?"
196 * if the surprise occurs at the start of the line. "do you need to
197 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
198 * where the compiler doesn't know if foo is a method call or a function.
199 * It prints "Missing operator before end of line" if there's nothing
200 * after the missing operator, or "... before <...>" if there is something
201 * after the missing operator.
205 S_no_op(pTHX_ char *what, char *s)
207 char *oldbp = PL_bufptr;
208 bool is_first = (PL_oldbufptr == PL_linestart);
214 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
216 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
217 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
219 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
220 if (t < PL_bufptr && isSPACE(*t))
221 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
222 t - PL_oldoldbufptr, PL_oldoldbufptr);
226 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
233 * Complain about missing quote/regexp/heredoc terminator.
234 * If it's called with (char *)NULL then it cauterizes the line buffer.
235 * If we're in a delimited string and the delimiter is a control
236 * character, it's reformatted into a two-char sequence like ^C.
241 S_missingterm(pTHX_ char *s)
246 char *nl = strrchr(s,'\n');
252 iscntrl(PL_multi_close)
254 PL_multi_close < 32 || PL_multi_close == 127
258 tmpbuf[1] = toCTRL(PL_multi_close);
264 *tmpbuf = PL_multi_close;
268 q = strchr(s,'"') ? '\'' : '"';
269 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
277 Perl_deprecate(pTHX_ char *s)
280 if (ckWARN(WARN_DEPRECATED))
281 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
286 * Deprecate a comma-less variable list.
292 deprecate("comma-less variable list");
296 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
297 * utf16-to-utf8-reversed.
300 #ifdef PERL_CR_FILTER
304 register char *s = SvPVX(sv);
305 register char *e = s + SvCUR(sv);
306 /* outer loop optimized to do nothing if there are no CR-LFs */
308 if (*s++ == '\r' && *s == '\n') {
309 /* hit a CR-LF, need to copy the rest */
310 register char *d = s - 1;
313 if (*s == '\r' && s[1] == '\n')
324 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
326 I32 count = FILTER_READ(idx+1, sv, maxlen);
327 if (count > 0 && !maxlen)
335 * Initialize variables. Uses the Perl save_stack to save its state (for
336 * recursive calls to the parser).
340 Perl_lex_start(pTHX_ SV *line)
346 SAVEI32(PL_lex_dojoin);
347 SAVEI32(PL_lex_brackets);
348 SAVEI32(PL_lex_casemods);
349 SAVEI32(PL_lex_starts);
350 SAVEI32(PL_lex_state);
351 SAVEVPTR(PL_lex_inpat);
352 SAVEI32(PL_lex_inwhat);
353 if (PL_lex_state == LEX_KNOWNEXT) {
354 I32 toke = PL_nexttoke;
355 while (--toke >= 0) {
356 SAVEI32(PL_nexttype[toke]);
357 SAVEVPTR(PL_nextval[toke]);
359 SAVEI32(PL_nexttoke);
361 SAVECOPLINE(PL_curcop);
364 SAVEPPTR(PL_oldbufptr);
365 SAVEPPTR(PL_oldoldbufptr);
366 SAVEPPTR(PL_linestart);
367 SAVESPTR(PL_linestr);
368 SAVEPPTR(PL_lex_brackstack);
369 SAVEPPTR(PL_lex_casestack);
370 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
371 SAVESPTR(PL_lex_stuff);
372 SAVEI32(PL_lex_defer);
373 SAVEI32(PL_sublex_info.sub_inwhat);
374 SAVESPTR(PL_lex_repl);
376 SAVEINT(PL_lex_expect);
378 PL_lex_state = LEX_NORMAL;
382 New(899, PL_lex_brackstack, 120, char);
383 New(899, PL_lex_casestack, 12, char);
384 SAVEFREEPV(PL_lex_brackstack);
385 SAVEFREEPV(PL_lex_casestack);
387 *PL_lex_casestack = '\0';
390 PL_lex_stuff = Nullsv;
391 PL_lex_repl = Nullsv;
395 PL_sublex_info.sub_inwhat = 0;
397 if (SvREADONLY(PL_linestr))
398 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
399 s = SvPV(PL_linestr, len);
400 if (len && s[len-1] != ';') {
401 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
402 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
403 sv_catpvn(PL_linestr, "\n;", 2);
405 SvTEMP_off(PL_linestr);
406 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
407 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
409 PL_rs = newSVpvn("\n", 1);
415 * Finalizer for lexing operations. Must be called when the parser is
416 * done with the lexer.
422 PL_doextract = FALSE;
427 * This subroutine has nothing to do with tilting, whether at windmills
428 * or pinball tables. Its name is short for "increment line". It
429 * increments the current line number in CopLINE(PL_curcop) and checks
430 * to see whether the line starts with a comment of the form
431 * # line 500 "foo.pm"
432 * If so, it sets the current line number and file to the values in the comment.
436 S_incline(pTHX_ char *s)
444 CopLINE_inc(PL_curcop);
447 while (SPACE_OR_TAB(*s)) s++;
448 if (strnEQ(s, "line", 4))
452 if (*s == ' ' || *s == '\t')
456 while (SPACE_OR_TAB(*s)) s++;
462 while (SPACE_OR_TAB(*s))
464 if (*s == '"' && (t = strchr(s+1, '"'))) {
469 for (t = s; !isSPACE(*t); t++) ;
472 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
474 if (*e != '\n' && *e != '\0')
475 return; /* false alarm */
481 Safefree(CopFILE(PL_curcop));
483 SvREFCNT_dec(CopFILEGV(PL_curcop));
485 CopFILE_set(PL_curcop, s);
488 CopLINE_set(PL_curcop, atoi(n)-1);
493 * Called to gobble the appropriate amount and type of whitespace.
494 * Skips comments as well.
498 S_skipspace(pTHX_ register char *s)
501 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
502 while (s < PL_bufend && SPACE_OR_TAB(*s))
508 SSize_t oldprevlen, oldoldprevlen;
509 SSize_t oldloplen, oldunilen;
510 while (s < PL_bufend && isSPACE(*s)) {
511 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
516 if (s < PL_bufend && *s == '#') {
517 while (s < PL_bufend && *s != '\n')
521 if (PL_in_eval && !PL_rsfp) {
528 /* only continue to recharge the buffer if we're at the end
529 * of the buffer, we're not reading from a source filter, and
530 * we're in normal lexing mode
532 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
533 PL_lex_state == LEX_FORMLINE)
536 /* try to recharge the buffer */
537 if ((s = filter_gets(PL_linestr, PL_rsfp,
538 (prevlen = SvCUR(PL_linestr)))) == Nullch)
540 /* end of file. Add on the -p or -n magic */
541 if (PL_minus_n || PL_minus_p) {
542 sv_setpv(PL_linestr,PL_minus_p ?
543 ";}continue{print or die qq(-p destination: $!\\n)" :
545 sv_catpv(PL_linestr,";}");
546 PL_minus_n = PL_minus_p = 0;
549 sv_setpv(PL_linestr,";");
551 /* reset variables for next time we lex */
552 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
554 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
556 /* Close the filehandle. Could be from -P preprocessor,
557 * STDIN, or a regular file. If we were reading code from
558 * STDIN (because the commandline held no -e or filename)
559 * then we don't close it, we reset it so the code can
560 * read from STDIN too.
563 if (PL_preprocess && !PL_in_eval)
564 (void)PerlProc_pclose(PL_rsfp);
565 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
566 PerlIO_clearerr(PL_rsfp);
568 (void)PerlIO_close(PL_rsfp);
573 /* not at end of file, so we only read another line */
574 /* make corresponding updates to old pointers, for yyerror() */
575 oldprevlen = PL_oldbufptr - PL_bufend;
576 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
578 oldunilen = PL_last_uni - PL_bufend;
580 oldloplen = PL_last_lop - PL_bufend;
581 PL_linestart = PL_bufptr = s + prevlen;
582 PL_bufend = s + SvCUR(PL_linestr);
584 PL_oldbufptr = s + oldprevlen;
585 PL_oldoldbufptr = s + oldoldprevlen;
587 PL_last_uni = s + oldunilen;
589 PL_last_lop = s + oldloplen;
592 /* debugger active and we're not compiling the debugger code,
593 * so store the line into the debugger's array of lines
595 if (PERLDB_LINE && PL_curstash != PL_debstash) {
596 SV *sv = NEWSV(85,0);
598 sv_upgrade(sv, SVt_PVMG);
599 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
600 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
607 * Check the unary operators to ensure there's no ambiguity in how they're
608 * used. An ambiguous piece of code would be:
610 * This doesn't mean rand() + 5. Because rand() is a unary operator,
611 * the +5 is its argument.
621 if (PL_oldoldbufptr != PL_last_uni)
623 while (isSPACE(*PL_last_uni))
625 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
626 if ((t = strchr(s, '(')) && t < PL_bufptr)
628 if (ckWARN_d(WARN_AMBIGUOUS)){
631 Perl_warner(aTHX_ WARN_AMBIGUOUS,
632 "Warning: Use of \"%s\" without parens is ambiguous",
638 /* workaround to replace the UNI() macro with a function. Only the
639 * hints/uts.sh file mentions this. Other comments elsewhere in the
640 * source indicate Microport Unix might need it too.
646 #define UNI(f) return uni(f,s)
649 S_uni(pTHX_ I32 f, char *s)
654 PL_last_uni = PL_oldbufptr;
665 #endif /* CRIPPLED_CC */
668 * LOP : macro to build a list operator. Its behaviour has been replaced
669 * with a subroutine, S_lop() for which LOP is just another name.
672 #define LOP(f,x) return lop(f,x,s)
676 * Build a list operator (or something that might be one). The rules:
677 * - if we have a next token, then it's a list operator [why?]
678 * - if the next thing is an opening paren, then it's a function
679 * - else it's a list operator
683 S_lop(pTHX_ I32 f, int x, char *s)
690 PL_last_lop = PL_oldbufptr;
705 * When the lexer realizes it knows the next token (for instance,
706 * it is reordering tokens for the parser) then it can call S_force_next
707 * to know what token to return the next time the lexer is called. Caller
708 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
709 * handles the token correctly.
713 S_force_next(pTHX_ I32 type)
715 PL_nexttype[PL_nexttoke] = type;
717 if (PL_lex_state != LEX_KNOWNEXT) {
718 PL_lex_defer = PL_lex_state;
719 PL_lex_expect = PL_expect;
720 PL_lex_state = LEX_KNOWNEXT;
726 * When the lexer knows the next thing is a word (for instance, it has
727 * just seen -> and it knows that the next char is a word char, then
728 * it calls S_force_word to stick the next word into the PL_next lookahead.
731 * char *start : buffer position (must be within PL_linestr)
732 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
733 * int check_keyword : if true, Perl checks to make sure the word isn't
734 * a keyword (do this if the word is a label, e.g. goto FOO)
735 * int allow_pack : if true, : characters will also be allowed (require,
737 * int allow_initial_tick : used by the "sub" lexer only.
741 S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
746 start = skipspace(start);
748 if (isIDFIRST_lazy_if(s,UTF) ||
749 (allow_pack && *s == ':') ||
750 (allow_initial_tick && *s == '\'') )
752 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
753 if (check_keyword && keyword(PL_tokenbuf, len))
755 if (token == METHOD) {
760 PL_expect = XOPERATOR;
763 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
764 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
772 * Called when the lexer wants $foo *foo &foo etc, but the program
773 * text only contains the "foo" portion. The first argument is a pointer
774 * to the "foo", and the second argument is the type symbol to prefix.
775 * Forces the next token to be a "WORD".
776 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
780 S_force_ident(pTHX_ register char *s, int kind)
783 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
784 PL_nextval[PL_nexttoke].opval = o;
787 dTHR; /* just for in_eval */
788 o->op_private = OPpCONST_ENTERED;
789 /* XXX see note in pp_entereval() for why we forgo typo
790 warnings if the symbol must be introduced in an eval.
792 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
793 kind == '$' ? SVt_PV :
794 kind == '@' ? SVt_PVAV :
795 kind == '%' ? SVt_PVHV :
803 Perl_str_to_version(pTHX_ SV *sv)
808 char *start = SvPVx(sv,len);
809 bool utf = SvUTF8(sv) ? TRUE : FALSE;
810 char *end = start + len;
811 while (start < end) {
815 n = utf8_to_uv_chk((U8*)start, &skip, 0);
820 retval += ((NV)n)/nshift;
829 * Forces the next token to be a version number.
833 S_force_version(pTHX_ char *s)
835 OP *version = Nullop;
844 for (; isDIGIT(*d) || *d == '_' || *d == '.'; d++);
845 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
848 version = yylval.opval;
849 ver = cSVOPx(version)->op_sv;
850 if (SvPOK(ver) && !SvNIOK(ver)) {
851 (void)SvUPGRADE(ver, SVt_PVNV);
852 SvNVX(ver) = str_to_version(ver);
853 SvNOK_on(ver); /* hint that it is a version */
858 /* NOTE: The parser sees the package name and the VERSION swapped */
859 PL_nextval[PL_nexttoke].opval = version;
867 * Tokenize a quoted string passed in as an SV. It finds the next
868 * chunk, up to end of string or a backslash. It may make a new
869 * SV containing that chunk (if HINT_NEW_STRING is on). It also
874 S_tokeq(pTHX_ SV *sv)
885 s = SvPV_force(sv, len);
886 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
889 while (s < send && *s != '\\')
894 if ( PL_hints & HINT_NEW_STRING )
895 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
898 if (s + 1 < send && (s[1] == '\\'))
899 s++; /* all that, just for this */
904 SvCUR_set(sv, d - SvPVX(sv));
906 if ( PL_hints & HINT_NEW_STRING )
907 return new_constant(NULL, 0, "q", sv, pv, "q");
912 * Now come three functions related to double-quote context,
913 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
914 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
915 * interact with PL_lex_state, and create fake ( ... ) argument lists
916 * to handle functions and concatenation.
917 * They assume that whoever calls them will be setting up a fake
918 * join call, because each subthing puts a ',' after it. This lets
921 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
923 * (I'm not sure whether the spurious commas at the end of lcfirst's
924 * arguments and join's arguments are created or not).
929 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
931 * Pattern matching will set PL_lex_op to the pattern-matching op to
932 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
934 * OP_CONST and OP_READLINE are easy--just make the new op and return.
936 * Everything else becomes a FUNC.
938 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
939 * had an OP_CONST or OP_READLINE). This just sets us up for a
940 * call to S_sublex_push().
946 register I32 op_type = yylval.ival;
948 if (op_type == OP_NULL) {
949 yylval.opval = PL_lex_op;
953 if (op_type == OP_CONST || op_type == OP_READLINE) {
954 SV *sv = tokeq(PL_lex_stuff);
956 if (SvTYPE(sv) == SVt_PVIV) {
957 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
963 nsv = newSVpvn(p, len);
969 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
970 PL_lex_stuff = Nullsv;
974 PL_sublex_info.super_state = PL_lex_state;
975 PL_sublex_info.sub_inwhat = op_type;
976 PL_sublex_info.sub_op = PL_lex_op;
977 PL_lex_state = LEX_INTERPPUSH;
981 yylval.opval = PL_lex_op;
991 * Create a new scope to save the lexing state. The scope will be
992 * ended in S_sublex_done. Returns a '(', starting the function arguments
993 * to the uc, lc, etc. found before.
994 * Sets PL_lex_state to LEX_INTERPCONCAT.
1003 PL_lex_state = PL_sublex_info.super_state;
1004 SAVEI32(PL_lex_dojoin);
1005 SAVEI32(PL_lex_brackets);
1006 SAVEI32(PL_lex_casemods);
1007 SAVEI32(PL_lex_starts);
1008 SAVEI32(PL_lex_state);
1009 SAVEVPTR(PL_lex_inpat);
1010 SAVEI32(PL_lex_inwhat);
1011 SAVECOPLINE(PL_curcop);
1012 SAVEPPTR(PL_bufptr);
1013 SAVEPPTR(PL_oldbufptr);
1014 SAVEPPTR(PL_oldoldbufptr);
1015 SAVEPPTR(PL_linestart);
1016 SAVESPTR(PL_linestr);
1017 SAVEPPTR(PL_lex_brackstack);
1018 SAVEPPTR(PL_lex_casestack);
1020 PL_linestr = PL_lex_stuff;
1021 PL_lex_stuff = Nullsv;
1023 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1024 = SvPVX(PL_linestr);
1025 PL_bufend += SvCUR(PL_linestr);
1026 SAVEFREESV(PL_linestr);
1028 PL_lex_dojoin = FALSE;
1029 PL_lex_brackets = 0;
1030 New(899, PL_lex_brackstack, 120, char);
1031 New(899, PL_lex_casestack, 12, char);
1032 SAVEFREEPV(PL_lex_brackstack);
1033 SAVEFREEPV(PL_lex_casestack);
1034 PL_lex_casemods = 0;
1035 *PL_lex_casestack = '\0';
1037 PL_lex_state = LEX_INTERPCONCAT;
1038 CopLINE_set(PL_curcop, PL_multi_start);
1040 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1041 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1042 PL_lex_inpat = PL_sublex_info.sub_op;
1044 PL_lex_inpat = Nullop;
1051 * Restores lexer state after a S_sublex_push.
1057 if (!PL_lex_starts++) {
1058 PL_expect = XOPERATOR;
1059 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpvn("",0));
1063 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1064 PL_lex_state = LEX_INTERPCASEMOD;
1068 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
1069 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1070 PL_linestr = PL_lex_repl;
1072 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1073 PL_bufend += SvCUR(PL_linestr);
1074 SAVEFREESV(PL_linestr);
1075 PL_lex_dojoin = FALSE;
1076 PL_lex_brackets = 0;
1077 PL_lex_casemods = 0;
1078 *PL_lex_casestack = '\0';
1080 if (SvEVALED(PL_lex_repl)) {
1081 PL_lex_state = LEX_INTERPNORMAL;
1083 /* we don't clear PL_lex_repl here, so that we can check later
1084 whether this is an evalled subst; that means we rely on the
1085 logic to ensure sublex_done() is called again only via the
1086 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
1089 PL_lex_state = LEX_INTERPCONCAT;
1090 PL_lex_repl = Nullsv;
1096 PL_bufend = SvPVX(PL_linestr);
1097 PL_bufend += SvCUR(PL_linestr);
1098 PL_expect = XOPERATOR;
1099 PL_sublex_info.sub_inwhat = 0;
1107 Extracts a pattern, double-quoted string, or transliteration. This
1110 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1111 processing a pattern (PL_lex_inpat is true), a transliteration
1112 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1114 Returns a pointer to the character scanned up to. Iff this is
1115 advanced from the start pointer supplied (ie if anything was
1116 successfully parsed), will leave an OP for the substring scanned
1117 in yylval. Caller must intuit reason for not parsing further
1118 by looking at the next characters herself.
1122 double-quoted style: \r and \n
1123 regexp special ones: \D \s
1125 backrefs: \1 (deprecated in substitution replacements)
1126 case and quoting: \U \Q \E
1127 stops on @ and $, but not for $ as tail anchor
1129 In transliterations:
1130 characters are VERY literal, except for - not at the start or end
1131 of the string, which indicates a range. scan_const expands the
1132 range to the full set of intermediate characters.
1134 In double-quoted strings:
1136 double-quoted style: \r and \n
1138 backrefs: \1 (deprecated)
1139 case and quoting: \U \Q \E
1142 scan_const does *not* construct ops to handle interpolated strings.
1143 It stops processing as soon as it finds an embedded $ or @ variable
1144 and leaves it to the caller to work out what's going on.
1146 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1148 $ in pattern could be $foo or could be tail anchor. Assumption:
1149 it's a tail anchor if $ is the last thing in the string, or if it's
1150 followed by one of ")| \n\t"
1152 \1 (backreferences) are turned into $1
1154 The structure of the code is
1155 while (there's a character to process) {
1156 handle transliteration ranges
1157 skip regexp comments
1158 skip # initiated comments in //x patterns
1159 check for embedded @foo
1160 check for embedded scalars
1162 leave intact backslashes from leave (below)
1163 deprecate \1 in strings and sub replacements
1164 handle string-changing backslashes \l \U \Q \E, etc.
1165 switch (what was escaped) {
1166 handle - in a transliteration (becomes a literal -)
1167 handle \132 octal characters
1168 handle 0x15 hex characters
1169 handle \cV (control V)
1170 handle printf backslashes (\f, \r, \n, etc)
1172 } (end if backslash)
1173 } (end while character to read)
1178 S_scan_const(pTHX_ char *start)
1180 register char *send = PL_bufend; /* end of the constant */
1181 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1182 register char *s = start; /* start of the constant */
1183 register char *d = SvPVX(sv); /* destination for copies */
1184 bool dorange = FALSE; /* are we in a translit range? */
1185 bool didrange = FALSE; /* did we just finish a range? */
1186 bool has_utf = FALSE; /* embedded \x{} */
1190 I32 utf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1191 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1193 I32 thisutf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
1194 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ?
1195 OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
1197 const char *leaveit = /* set of acceptably-backslashed characters */
1199 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
1202 while (s < send || dorange) {
1203 /* get transliterations out of the way (they're most literal) */
1204 if (PL_lex_inwhat == OP_TRANS) {
1205 /* expand a range A-Z to the full set of characters. AIE! */
1207 I32 i; /* current expanded character */
1208 I32 min; /* first character in range */
1209 I32 max; /* last character in range */
1211 i = d - SvPVX(sv); /* remember current offset */
1212 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1213 d = SvPVX(sv) + i; /* refresh d after realloc */
1214 d -= 2; /* eat the first char and the - */
1216 min = (U8)*d; /* first char in range */
1217 max = (U8)d[1]; /* last char in range */
1221 "Invalid [] range \"%c-%c\" in transliteration operator",
1222 (char)min, (char)max);
1226 if ((isLOWER(min) && isLOWER(max)) ||
1227 (isUPPER(min) && isUPPER(max))) {
1229 for (i = min; i <= max; i++)
1233 for (i = min; i <= max; i++)
1240 for (i = min; i <= max; i++)
1243 /* mark the range as done, and continue */
1249 /* range begins (ignore - as first or last char) */
1250 else if (*s == '-' && s+1 < send && s != start) {
1252 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
1255 *d++ = (char)0xff; /* use illegal utf8 byte--see pmtrans */
1267 /* if we get here, we're not doing a transliteration */
1269 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1270 except for the last char, which will be done separately. */
1271 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1273 while (s < send && *s != ')')
1276 else if (s[2] == '{' /* This should match regcomp.c */
1277 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1280 char *regparse = s + (s[2] == '{' ? 3 : 4);
1283 while (count && (c = *regparse)) {
1284 if (c == '\\' && regparse[1])
1292 if (*regparse != ')') {
1293 regparse--; /* Leave one char for continuation. */
1294 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1296 while (s < regparse)
1301 /* likewise skip #-initiated comments in //x patterns */
1302 else if (*s == '#' && PL_lex_inpat &&
1303 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1304 while (s+1 < send && *s != '\n')
1308 /* check for embedded arrays
1309 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1311 else if (*s == '@' && s[1]
1312 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
1315 /* check for embedded scalars. only stop if we're sure it's a
1318 else if (*s == '$') {
1319 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1321 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1322 break; /* in regexp, $ might be tail anchor */
1325 /* (now in tr/// code again) */
1327 if (*s & 0x80 && thisutf) {
1328 (void)utf8_to_uv_chk((U8*)s, &len, 0);
1330 /* illegal UTF8, make it valid */
1331 char *old_pvx = SvPVX(sv);
1332 /* need space for one extra char (NOTE: SvCUR() not set here) */
1333 d = SvGROW(sv, SvLEN(sv) + 1) + (d - old_pvx);
1334 d = (char*)uv_to_utf8((U8*)d, (U8)*s++);
1345 if (*s == '\\' && s+1 < send) {
1348 /* some backslashes we leave behind */
1349 if (*leaveit && *s && strchr(leaveit, *s)) {
1355 /* deprecate \1 in strings and substitution replacements */
1356 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1357 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1359 dTHR; /* only for ckWARN */
1360 if (ckWARN(WARN_SYNTAX))
1361 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1366 /* string-change backslash escapes */
1367 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1372 /* if we get here, it's either a quoted -, or a digit */
1375 /* quoted - in transliterations */
1377 if (PL_lex_inwhat == OP_TRANS) {
1385 if (ckWARN(WARN_MISC) && isALNUM(*s))
1386 Perl_warner(aTHX_ WARN_MISC,
1387 "Unrecognized escape \\%c passed through",
1389 /* default action is to copy the quoted character */
1394 /* \132 indicates an octal constant */
1395 case '0': case '1': case '2': case '3':
1396 case '4': case '5': case '6': case '7':
1397 len = 0; /* disallow underscores */
1398 uv = (UV)scan_oct(s, 3, &len);
1400 goto NUM_ESCAPE_INSERT;
1402 /* \x24 indicates a hex constant */
1406 char* e = strchr(s, '}');
1408 yyerror("Missing right brace on \\x{}");
1411 len = 1; /* allow underscores */
1412 uv = (UV)scan_hex(s + 1, e - s - 1, &len);
1416 len = 0; /* disallow underscores */
1417 uv = (UV)scan_hex(s, 2, &len);
1422 /* Insert oct or hex escaped character.
1423 * There will always enough room in sv since such escapes will
1424 * be longer than any utf8 sequence they can end up as
1427 if (!thisutf && !has_utf && uv > 255) {
1428 /* might need to recode whatever we have accumulated so far
1429 * if it contains any hibit chars
1433 for (c = SvPVX(sv); c < d; c++) {
1438 char *old_pvx = SvPVX(sv);
1440 d = SvGROW(sv, SvCUR(sv) + hicount + 1) + (d - old_pvx);
1449 uv_to_utf8((U8*)dst, (U8)*src--);
1459 if (thisutf || uv > 255) {
1460 d = (char*)uv_to_utf8((U8*)d, uv);
1472 /* \N{latin small letter a} is a named character */
1476 char* e = strchr(s, '}');
1482 yyerror("Missing right brace on \\N{}");
1486 res = newSVpvn(s + 1, e - s - 1);
1487 res = new_constant( Nullch, 0, "charnames",
1488 res, Nullsv, "\\N{...}" );
1489 str = SvPV(res,len);
1490 if (!has_utf && SvUTF8(res)) {
1491 char *ostart = SvPVX(sv);
1492 SvCUR_set(sv, d - ostart);
1495 sv_utf8_upgrade(sv);
1496 /* this just broke our allocation above... */
1497 SvGROW(sv, send - start);
1498 d = SvPVX(sv) + SvCUR(sv);
1501 if (len > e - s + 4) {
1502 char *odest = SvPVX(sv);
1504 SvGROW(sv, (SvCUR(sv) + len - (e - s + 4)));
1505 d = SvPVX(sv) + (d - odest);
1507 Copy(str, d, len, char);
1514 yyerror("Missing braces on \\N{}");
1517 /* \c is a control character */
1532 /* printf-style backslashes, formfeeds, newlines, etc */
1550 *d++ = '\047'; /* CP 1047 */
1553 *d++ = '\057'; /* CP 1047 */
1567 } /* end if (backslash) */
1570 } /* while loop to process each character */
1572 /* terminate the string and set up the sv */
1574 SvCUR_set(sv, d - SvPVX(sv));
1579 /* shrink the sv if we allocated more than we used */
1580 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1581 SvLEN_set(sv, SvCUR(sv) + 1);
1582 Renew(SvPVX(sv), SvLEN(sv), char);
1585 /* return the substring (via yylval) only if we parsed anything */
1586 if (s > PL_bufptr) {
1587 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1588 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1590 ( PL_lex_inwhat == OP_TRANS
1592 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1595 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1602 * Returns TRUE if there's more to the expression (e.g., a subscript),
1605 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1607 * ->[ and ->{ return TRUE
1608 * { and [ outside a pattern are always subscripts, so return TRUE
1609 * if we're outside a pattern and it's not { or [, then return FALSE
1610 * if we're in a pattern and the first char is a {
1611 * {4,5} (any digits around the comma) returns FALSE
1612 * if we're in a pattern and the first char is a [
1614 * [SOMETHING] has a funky algorithm to decide whether it's a
1615 * character class or not. It has to deal with things like
1616 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1617 * anything else returns TRUE
1620 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1623 S_intuit_more(pTHX_ register char *s)
1625 if (PL_lex_brackets)
1627 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1629 if (*s != '{' && *s != '[')
1634 /* In a pattern, so maybe we have {n,m}. */
1651 /* On the other hand, maybe we have a character class */
1654 if (*s == ']' || *s == '^')
1657 /* this is terrifying, and it works */
1658 int weight = 2; /* let's weigh the evidence */
1660 unsigned char un_char = 255, last_un_char;
1661 char *send = strchr(s,']');
1662 char tmpbuf[sizeof PL_tokenbuf * 4];
1664 if (!send) /* has to be an expression */
1667 Zero(seen,256,char);
1670 else if (isDIGIT(*s)) {
1672 if (isDIGIT(s[1]) && s[2] == ']')
1678 for (; s < send; s++) {
1679 last_un_char = un_char;
1680 un_char = (unsigned char)*s;
1685 weight -= seen[un_char] * 10;
1686 if (isALNUM_lazy_if(s+1,UTF)) {
1687 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1688 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1693 else if (*s == '$' && s[1] &&
1694 strchr("[#!%*<>()-=",s[1])) {
1695 if (/*{*/ strchr("])} =",s[2]))
1704 if (strchr("wds]",s[1]))
1706 else if (seen['\''] || seen['"'])
1708 else if (strchr("rnftbxcav",s[1]))
1710 else if (isDIGIT(s[1])) {
1712 while (s[1] && isDIGIT(s[1]))
1722 if (strchr("aA01! ",last_un_char))
1724 if (strchr("zZ79~",s[1]))
1726 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1727 weight -= 5; /* cope with negative subscript */
1730 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1731 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1736 if (keyword(tmpbuf, d - tmpbuf))
1739 if (un_char == last_un_char + 1)
1741 weight -= seen[un_char];
1746 if (weight >= 0) /* probably a character class */
1756 * Does all the checking to disambiguate
1758 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1759 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1761 * First argument is the stuff after the first token, e.g. "bar".
1763 * Not a method if bar is a filehandle.
1764 * Not a method if foo is a subroutine prototyped to take a filehandle.
1765 * Not a method if it's really "Foo $bar"
1766 * Method if it's "foo $bar"
1767 * Not a method if it's really "print foo $bar"
1768 * Method if it's really "foo package::" (interpreted as package->foo)
1769 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1770 * Not a method if bar is a filehandle or package, but is quoted with
1775 S_intuit_method(pTHX_ char *start, GV *gv)
1777 char *s = start + (*start == '$');
1778 char tmpbuf[sizeof PL_tokenbuf];
1786 if ((cv = GvCVu(gv))) {
1787 char *proto = SvPVX(cv);
1797 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1798 /* start is the beginning of the possible filehandle/object,
1799 * and s is the end of it
1800 * tmpbuf is a copy of it
1803 if (*start == '$') {
1804 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1809 return *s == '(' ? FUNCMETH : METHOD;
1811 if (!keyword(tmpbuf, len)) {
1812 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1817 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1818 if (indirgv && GvCVu(indirgv))
1820 /* filehandle or package name makes it a method */
1821 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1823 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1824 return 0; /* no assumptions -- "=>" quotes bearword */
1826 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1827 newSVpvn(tmpbuf,len));
1828 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1832 return *s == '(' ? FUNCMETH : METHOD;
1840 * Return a string of Perl code to load the debugger. If PERL5DB
1841 * is set, it will return the contents of that, otherwise a
1842 * compile-time require of perl5db.pl.
1849 char *pdb = PerlEnv_getenv("PERL5DB");
1853 SETERRNO(0,SS$_NORMAL);
1854 return "BEGIN { require 'perl5db.pl' }";
1860 /* Encoded script support. filter_add() effectively inserts a
1861 * 'pre-processing' function into the current source input stream.
1862 * Note that the filter function only applies to the current source file
1863 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1865 * The datasv parameter (which may be NULL) can be used to pass
1866 * private data to this instance of the filter. The filter function
1867 * can recover the SV using the FILTER_DATA macro and use it to
1868 * store private buffers and state information.
1870 * The supplied datasv parameter is upgraded to a PVIO type
1871 * and the IoDIRP/IoANY field is used to store the function pointer,
1872 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1873 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1874 * private use must be set using malloc'd pointers.
1878 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1883 if (!PL_rsfp_filters)
1884 PL_rsfp_filters = newAV();
1886 datasv = NEWSV(255,0);
1887 if (!SvUPGRADE(datasv, SVt_PVIO))
1888 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1889 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1890 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1891 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1892 funcp, SvPV_nolen(datasv)));
1893 av_unshift(PL_rsfp_filters, 1);
1894 av_store(PL_rsfp_filters, 0, datasv) ;
1899 /* Delete most recently added instance of this filter function. */
1901 Perl_filter_del(pTHX_ filter_t funcp)
1904 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1905 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1907 /* if filter is on top of stack (usual case) just pop it off */
1908 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1909 if (IoANY(datasv) == (void *)funcp) {
1910 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1911 IoANY(datasv) = (void *)NULL;
1912 sv_free(av_pop(PL_rsfp_filters));
1916 /* we need to search for the correct entry and clear it */
1917 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1921 /* Invoke the n'th filter function for the current rsfp. */
1923 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1926 /* 0 = read one text line */
1931 if (!PL_rsfp_filters)
1933 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1934 /* Provide a default input filter to make life easy. */
1935 /* Note that we append to the line. This is handy. */
1936 DEBUG_P(PerlIO_printf(Perl_debug_log,
1937 "filter_read %d: from rsfp\n", idx));
1941 int old_len = SvCUR(buf_sv) ;
1943 /* ensure buf_sv is large enough */
1944 SvGROW(buf_sv, old_len + maxlen) ;
1945 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1946 if (PerlIO_error(PL_rsfp))
1947 return -1; /* error */
1949 return 0 ; /* end of file */
1951 SvCUR_set(buf_sv, old_len + len) ;
1954 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
1955 if (PerlIO_error(PL_rsfp))
1956 return -1; /* error */
1958 return 0 ; /* end of file */
1961 return SvCUR(buf_sv);
1963 /* Skip this filter slot if filter has been deleted */
1964 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
1965 DEBUG_P(PerlIO_printf(Perl_debug_log,
1966 "filter_read %d: skipped (filter deleted)\n",
1968 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1970 /* Get function pointer hidden within datasv */
1971 funcp = (filter_t)IoANY(datasv);
1972 DEBUG_P(PerlIO_printf(Perl_debug_log,
1973 "filter_read %d: via function %p (%s)\n",
1974 idx, funcp, SvPV_nolen(datasv)));
1975 /* Call function. The function is expected to */
1976 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1977 /* Return: <0:error, =0:eof, >0:not eof */
1978 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
1982 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
1984 #ifdef PERL_CR_FILTER
1985 if (!PL_rsfp_filters) {
1986 filter_add(S_cr_textfilter,NULL);
1989 if (PL_rsfp_filters) {
1992 SvCUR_set(sv, 0); /* start with empty line */
1993 if (FILTER_READ(0, sv, 0) > 0)
1994 return ( SvPVX(sv) ) ;
1999 return (sv_gets(sv, fp, append));
2003 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2007 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2011 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2012 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2014 return GvHV(gv); /* Foo:: */
2017 /* use constant CLASS => 'MyClass' */
2018 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2020 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2021 pkgname = SvPV_nolen(sv);
2025 return gv_stashpv(pkgname, FALSE);
2029 static char* exp_name[] =
2030 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2031 "ATTRTERM", "TERMBLOCK"
2038 Works out what to call the token just pulled out of the input
2039 stream. The yacc parser takes care of taking the ops we return and
2040 stitching them into a tree.
2046 if read an identifier
2047 if we're in a my declaration
2048 croak if they tried to say my($foo::bar)
2049 build the ops for a my() declaration
2050 if it's an access to a my() variable
2051 are we in a sort block?
2052 croak if my($a); $a <=> $b
2053 build ops for access to a my() variable
2054 if in a dq string, and they've said @foo and we can't find @foo
2056 build ops for a bareword
2057 if we already built the token before, use it.
2061 #pragma segment Perl_yylex
2064 #ifdef USE_PURE_BISON
2065 Perl_yylex(pTHX_ YYSTYPE *lvalp, int *lcharp)
2078 #ifdef USE_PURE_BISON
2079 yylval_pointer = lvalp;
2080 yychar_pointer = lcharp;
2083 /* check if there's an identifier for us to look at */
2084 if (PL_pending_ident) {
2085 /* pit holds the identifier we read and pending_ident is reset */
2086 char pit = PL_pending_ident;
2087 PL_pending_ident = 0;
2089 /* if we're in a my(), we can't allow dynamics here.
2090 $foo'bar has already been turned into $foo::bar, so
2091 just check for colons.
2093 if it's a legal name, the OP is a PADANY.
2096 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2097 if (strchr(PL_tokenbuf,':'))
2098 yyerror(Perl_form(aTHX_ "No package name allowed for "
2099 "variable %s in \"our\"",
2101 tmp = pad_allocmy(PL_tokenbuf);
2104 if (strchr(PL_tokenbuf,':'))
2105 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2107 yylval.opval = newOP(OP_PADANY, 0);
2108 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2114 build the ops for accesses to a my() variable.
2116 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2117 then used in a comparison. This catches most, but not
2118 all cases. For instance, it catches
2119 sort { my($a); $a <=> $b }
2121 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2122 (although why you'd do that is anyone's guess).
2125 if (!strchr(PL_tokenbuf,':')) {
2127 /* Check for single character per-thread SVs */
2128 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2129 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2130 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2132 yylval.opval = newOP(OP_THREADSV, 0);
2133 yylval.opval->op_targ = tmp;
2136 #endif /* USE_THREADS */
2137 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2138 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2139 /* might be an "our" variable" */
2140 if (SvFLAGS(namesv) & SVpad_OUR) {
2141 /* build ops for a bareword */
2142 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2143 sv_catpvn(sym, "::", 2);
2144 sv_catpv(sym, PL_tokenbuf+1);
2145 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2146 yylval.opval->op_private = OPpCONST_ENTERED;
2147 gv_fetchpv(SvPVX(sym),
2149 ? (GV_ADDMULTI | GV_ADDINEVAL)
2152 ((PL_tokenbuf[0] == '$') ? SVt_PV
2153 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2158 /* if it's a sort block and they're naming $a or $b */
2159 if (PL_last_lop_op == OP_SORT &&
2160 PL_tokenbuf[0] == '$' &&
2161 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2164 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2165 d < PL_bufend && *d != '\n';
2168 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2169 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2175 yylval.opval = newOP(OP_PADANY, 0);
2176 yylval.opval->op_targ = tmp;
2182 Whine if they've said @foo in a doublequoted string,
2183 and @foo isn't a variable we can find in the symbol
2186 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2187 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2188 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2189 && ckWARN(WARN_AMBIGUOUS))
2191 /* Downgraded from fatal to warning 20000522 mjd */
2192 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2193 "Possible unintended interpolation of %s in string",
2198 /* build ops for a bareword */
2199 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2200 yylval.opval->op_private = OPpCONST_ENTERED;
2201 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2202 ((PL_tokenbuf[0] == '$') ? SVt_PV
2203 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2208 /* no identifier pending identification */
2210 switch (PL_lex_state) {
2212 case LEX_NORMAL: /* Some compilers will produce faster */
2213 case LEX_INTERPNORMAL: /* code if we comment these out. */
2217 /* when we've already built the next token, just pull it out of the queue */
2220 yylval = PL_nextval[PL_nexttoke];
2222 PL_lex_state = PL_lex_defer;
2223 PL_expect = PL_lex_expect;
2224 PL_lex_defer = LEX_NORMAL;
2226 return(PL_nexttype[PL_nexttoke]);
2228 /* interpolated case modifiers like \L \U, including \Q and \E.
2229 when we get here, PL_bufptr is at the \
2231 case LEX_INTERPCASEMOD:
2233 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2234 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2236 /* handle \E or end of string */
2237 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2241 if (PL_lex_casemods) {
2242 oldmod = PL_lex_casestack[--PL_lex_casemods];
2243 PL_lex_casestack[PL_lex_casemods] = '\0';
2245 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2247 PL_lex_state = LEX_INTERPCONCAT;
2251 if (PL_bufptr != PL_bufend)
2253 PL_lex_state = LEX_INTERPCONCAT;
2258 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2259 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2260 if (strchr("LU", *s) &&
2261 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2263 PL_lex_casestack[--PL_lex_casemods] = '\0';
2266 if (PL_lex_casemods > 10) {
2267 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2268 if (newlb != PL_lex_casestack) {
2270 PL_lex_casestack = newlb;
2273 PL_lex_casestack[PL_lex_casemods++] = *s;
2274 PL_lex_casestack[PL_lex_casemods] = '\0';
2275 PL_lex_state = LEX_INTERPCONCAT;
2276 PL_nextval[PL_nexttoke].ival = 0;
2279 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2281 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2283 PL_nextval[PL_nexttoke].ival = OP_LC;
2285 PL_nextval[PL_nexttoke].ival = OP_UC;
2287 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2289 Perl_croak(aTHX_ "panic: yylex");
2292 if (PL_lex_starts) {
2301 case LEX_INTERPPUSH:
2302 return sublex_push();
2304 case LEX_INTERPSTART:
2305 if (PL_bufptr == PL_bufend)
2306 return sublex_done();
2308 PL_lex_dojoin = (*PL_bufptr == '@');
2309 PL_lex_state = LEX_INTERPNORMAL;
2310 if (PL_lex_dojoin) {
2311 PL_nextval[PL_nexttoke].ival = 0;
2314 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2315 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2316 force_next(PRIVATEREF);
2318 force_ident("\"", '$');
2319 #endif /* USE_THREADS */
2320 PL_nextval[PL_nexttoke].ival = 0;
2322 PL_nextval[PL_nexttoke].ival = 0;
2324 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2327 if (PL_lex_starts++) {
2333 case LEX_INTERPENDMAYBE:
2334 if (intuit_more(PL_bufptr)) {
2335 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2341 if (PL_lex_dojoin) {
2342 PL_lex_dojoin = FALSE;
2343 PL_lex_state = LEX_INTERPCONCAT;
2346 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2347 && SvEVALED(PL_lex_repl))
2349 if (PL_bufptr != PL_bufend)
2350 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2351 PL_lex_repl = Nullsv;
2354 case LEX_INTERPCONCAT:
2356 if (PL_lex_brackets)
2357 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2359 if (PL_bufptr == PL_bufend)
2360 return sublex_done();
2362 if (SvIVX(PL_linestr) == '\'') {
2363 SV *sv = newSVsv(PL_linestr);
2366 else if ( PL_hints & HINT_NEW_RE )
2367 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2368 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2372 s = scan_const(PL_bufptr);
2374 PL_lex_state = LEX_INTERPCASEMOD;
2376 PL_lex_state = LEX_INTERPSTART;
2379 if (s != PL_bufptr) {
2380 PL_nextval[PL_nexttoke] = yylval;
2383 if (PL_lex_starts++)
2393 PL_lex_state = LEX_NORMAL;
2394 s = scan_formline(PL_bufptr);
2395 if (!PL_lex_formbrack)
2401 PL_oldoldbufptr = PL_oldbufptr;
2404 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2405 exp_name[PL_expect], s);
2411 if (isIDFIRST_lazy_if(s,UTF))
2413 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2416 goto fake_eof; /* emulate EOF on ^D or ^Z */
2421 if (PL_lex_brackets)
2422 yyerror("Missing right curly or square bracket");
2425 if (s++ < PL_bufend)
2426 goto retry; /* ignore stray nulls */
2429 if (!PL_in_eval && !PL_preambled) {
2430 PL_preambled = TRUE;
2431 sv_setpv(PL_linestr,incl_perldb());
2432 if (SvCUR(PL_linestr))
2433 sv_catpv(PL_linestr,";");
2435 while(AvFILLp(PL_preambleav) >= 0) {
2436 SV *tmpsv = av_shift(PL_preambleav);
2437 sv_catsv(PL_linestr, tmpsv);
2438 sv_catpv(PL_linestr, ";");
2441 sv_free((SV*)PL_preambleav);
2442 PL_preambleav = NULL;
2444 if (PL_minus_n || PL_minus_p) {
2445 sv_catpv(PL_linestr, "LINE: while (<>) {");
2447 sv_catpv(PL_linestr,"chomp;");
2449 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2451 GvIMPORTED_AV_on(gv);
2453 if (strchr("/'\"", *PL_splitstr)
2454 && strchr(PL_splitstr + 1, *PL_splitstr))
2455 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2458 s = "'~#\200\1'"; /* surely one char is unused...*/
2459 while (s[1] && strchr(PL_splitstr, *s)) s++;
2461 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2462 "q" + (delim == '\''), delim);
2463 for (s = PL_splitstr; *s; s++) {
2465 sv_catpvn(PL_linestr, "\\", 1);
2466 sv_catpvn(PL_linestr, s, 1);
2468 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2472 sv_catpv(PL_linestr,"@F=split(' ');");
2475 sv_catpv(PL_linestr, "\n");
2476 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2477 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2478 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2479 SV *sv = NEWSV(85,0);
2481 sv_upgrade(sv, SVt_PVMG);
2482 sv_setsv(sv,PL_linestr);
2483 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2489 bof = PL_rsfp && (PerlIO_tell(PL_rsfp) == 0); /* *Before* read! */
2490 s = filter_gets(PL_linestr, PL_rsfp, 0);
2494 if (PL_preprocess && !PL_in_eval)
2495 (void)PerlProc_pclose(PL_rsfp);
2496 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2497 PerlIO_clearerr(PL_rsfp);
2499 (void)PerlIO_close(PL_rsfp);
2501 PL_doextract = FALSE;
2503 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2504 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2505 sv_catpv(PL_linestr,";}");
2506 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2507 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2508 PL_minus_n = PL_minus_p = 0;
2511 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2512 sv_setpv(PL_linestr,"");
2513 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2515 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2516 s = swallow_bom((U8*)s);
2519 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2520 PL_doextract = FALSE;
2522 /* Incest with pod. */
2523 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2524 sv_setpv(PL_linestr, "");
2525 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2526 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2527 PL_doextract = FALSE;
2531 } while (PL_doextract);
2532 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2533 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2534 SV *sv = NEWSV(85,0);
2536 sv_upgrade(sv, SVt_PVMG);
2537 sv_setsv(sv,PL_linestr);
2538 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2540 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2541 if (CopLINE(PL_curcop) == 1) {
2542 while (s < PL_bufend && isSPACE(*s))
2544 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2548 if (*s == '#' && *(s+1) == '!')
2550 #ifdef ALTERNATE_SHEBANG
2552 static char as[] = ALTERNATE_SHEBANG;
2553 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2554 d = s + (sizeof(as) - 1);
2556 #endif /* ALTERNATE_SHEBANG */
2565 while (*d && !isSPACE(*d))
2569 #ifdef ARG_ZERO_IS_SCRIPT
2570 if (ipathend > ipath) {
2572 * HP-UX (at least) sets argv[0] to the script name,
2573 * which makes $^X incorrect. And Digital UNIX and Linux,
2574 * at least, set argv[0] to the basename of the Perl
2575 * interpreter. So, having found "#!", we'll set it right.
2577 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2578 assert(SvPOK(x) || SvGMAGICAL(x));
2579 if (sv_eq(x, CopFILESV(PL_curcop))) {
2580 sv_setpvn(x, ipath, ipathend - ipath);
2583 TAINT_NOT; /* $^X is always tainted, but that's OK */
2585 #endif /* ARG_ZERO_IS_SCRIPT */
2590 d = instr(s,"perl -");
2592 d = instr(s,"perl");
2594 /* avoid getting into infinite loops when shebang
2595 * line contains "Perl" rather than "perl" */
2597 for (d = ipathend-4; d >= ipath; --d) {
2598 if ((*d == 'p' || *d == 'P')
2599 && !ibcmp(d, "perl", 4))
2609 #ifdef ALTERNATE_SHEBANG
2611 * If the ALTERNATE_SHEBANG on this system starts with a
2612 * character that can be part of a Perl expression, then if
2613 * we see it but not "perl", we're probably looking at the
2614 * start of Perl code, not a request to hand off to some
2615 * other interpreter. Similarly, if "perl" is there, but
2616 * not in the first 'word' of the line, we assume the line
2617 * contains the start of the Perl program.
2619 if (d && *s != '#') {
2621 while (*c && !strchr("; \t\r\n\f\v#", *c))
2624 d = Nullch; /* "perl" not in first word; ignore */
2626 *s = '#'; /* Don't try to parse shebang line */
2628 #endif /* ALTERNATE_SHEBANG */
2629 #ifndef MACOS_TRADITIONAL
2634 !instr(s,"indir") &&
2635 instr(PL_origargv[0],"perl"))
2641 while (s < PL_bufend && isSPACE(*s))
2643 if (s < PL_bufend) {
2644 Newz(899,newargv,PL_origargc+3,char*);
2646 while (s < PL_bufend && !isSPACE(*s))
2649 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2652 newargv = PL_origargv;
2654 PerlProc_execv(ipath, newargv);
2655 Perl_croak(aTHX_ "Can't exec %s", ipath);
2659 U32 oldpdb = PL_perldb;
2660 bool oldn = PL_minus_n;
2661 bool oldp = PL_minus_p;
2663 while (*d && !isSPACE(*d)) d++;
2664 while (SPACE_OR_TAB(*d)) d++;
2668 if (*d == 'M' || *d == 'm') {
2670 while (*d && !isSPACE(*d)) d++;
2671 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2674 d = moreswitches(d);
2676 if ((PERLDB_LINE && !oldpdb) ||
2677 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2678 /* if we have already added "LINE: while (<>) {",
2679 we must not do it again */
2681 sv_setpv(PL_linestr, "");
2682 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2683 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2684 PL_preambled = FALSE;
2686 (void)gv_fetchfile(PL_origfilename);
2693 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2695 PL_lex_state = LEX_FORMLINE;
2700 #ifdef PERL_STRICT_CR
2701 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2703 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2705 case ' ': case '\t': case '\f': case 013:
2706 #ifdef MACOS_TRADITIONAL
2713 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2714 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2715 /* handle eval qq[#line 1 "foo"\n ...] */
2716 CopLINE_dec(PL_curcop);
2720 while (s < d && *s != '\n')
2725 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2727 PL_lex_state = LEX_FORMLINE;
2737 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2742 while (s < PL_bufend && SPACE_OR_TAB(*s))
2745 if (strnEQ(s,"=>",2)) {
2746 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2747 OPERATOR('-'); /* unary minus */
2749 PL_last_uni = PL_oldbufptr;
2750 PL_last_lop_op = OP_FTEREAD; /* good enough */
2752 case 'r': FTST(OP_FTEREAD);
2753 case 'w': FTST(OP_FTEWRITE);
2754 case 'x': FTST(OP_FTEEXEC);
2755 case 'o': FTST(OP_FTEOWNED);
2756 case 'R': FTST(OP_FTRREAD);
2757 case 'W': FTST(OP_FTRWRITE);
2758 case 'X': FTST(OP_FTREXEC);
2759 case 'O': FTST(OP_FTROWNED);
2760 case 'e': FTST(OP_FTIS);
2761 case 'z': FTST(OP_FTZERO);
2762 case 's': FTST(OP_FTSIZE);
2763 case 'f': FTST(OP_FTFILE);
2764 case 'd': FTST(OP_FTDIR);
2765 case 'l': FTST(OP_FTLINK);
2766 case 'p': FTST(OP_FTPIPE);
2767 case 'S': FTST(OP_FTSOCK);
2768 case 'u': FTST(OP_FTSUID);
2769 case 'g': FTST(OP_FTSGID);
2770 case 'k': FTST(OP_FTSVTX);
2771 case 'b': FTST(OP_FTBLK);
2772 case 'c': FTST(OP_FTCHR);
2773 case 't': FTST(OP_FTTTY);
2774 case 'T': FTST(OP_FTTEXT);
2775 case 'B': FTST(OP_FTBINARY);
2776 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
2777 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
2778 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
2780 Perl_croak(aTHX_ "Unrecognized file test: -%c", (int)tmp);
2787 if (PL_expect == XOPERATOR)
2792 else if (*s == '>') {
2795 if (isIDFIRST_lazy_if(s,UTF)) {
2796 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2804 if (PL_expect == XOPERATOR)
2807 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2809 OPERATOR('-'); /* unary minus */
2816 if (PL_expect == XOPERATOR)
2821 if (PL_expect == XOPERATOR)
2824 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2830 if (PL_expect != XOPERATOR) {
2831 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2832 PL_expect = XOPERATOR;
2833 force_ident(PL_tokenbuf, '*');
2846 if (PL_expect == XOPERATOR) {
2850 PL_tokenbuf[0] = '%';
2851 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2852 if (!PL_tokenbuf[1]) {
2854 yyerror("Final % should be \\% or %name");
2857 PL_pending_ident = '%';
2876 switch (PL_expect) {
2879 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
2881 PL_bufptr = s; /* update in case we back off */
2887 PL_expect = XTERMBLOCK;
2891 while (isIDFIRST_lazy_if(s,UTF)) {
2892 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
2893 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
2894 if (tmp < 0) tmp = -tmp;
2909 d = scan_str(d,TRUE,TRUE);
2912 SvREFCNT_dec(PL_lex_stuff);
2913 PL_lex_stuff = Nullsv;
2915 /* MUST advance bufptr here to avoid bogus
2916 "at end of line" context messages from yyerror().
2918 PL_bufptr = s + len;
2919 yyerror("Unterminated attribute parameter in attribute list");
2922 return 0; /* EOF indicator */
2926 SV *sv = newSVpvn(s, len);
2927 sv_catsv(sv, PL_lex_stuff);
2928 attrs = append_elem(OP_LIST, attrs,
2929 newSVOP(OP_CONST, 0, sv));
2930 SvREFCNT_dec(PL_lex_stuff);
2931 PL_lex_stuff = Nullsv;
2934 attrs = append_elem(OP_LIST, attrs,
2935 newSVOP(OP_CONST, 0,
2939 if (*s == ':' && s[1] != ':')
2942 break; /* require real whitespace or :'s */
2944 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
2945 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
2946 char q = ((*s == '\'') ? '"' : '\'');
2947 /* If here for an expression, and parsed no attrs, back off. */
2948 if (tmp == '=' && !attrs) {
2952 /* MUST advance bufptr here to avoid bogus "at end of line"
2953 context messages from yyerror().
2957 yyerror("Unterminated attribute list");
2959 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
2967 PL_nextval[PL_nexttoke].opval = attrs;
2975 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
2976 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
2992 if (PL_lex_brackets <= 0)
2993 yyerror("Unmatched right square bracket");
2996 if (PL_lex_state == LEX_INTERPNORMAL) {
2997 if (PL_lex_brackets == 0) {
2998 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
2999 PL_lex_state = LEX_INTERPEND;
3006 if (PL_lex_brackets > 100) {
3007 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3008 if (newlb != PL_lex_brackstack) {
3010 PL_lex_brackstack = newlb;
3013 switch (PL_expect) {
3015 if (PL_lex_formbrack) {
3019 if (PL_oldoldbufptr == PL_last_lop)
3020 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3022 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3023 OPERATOR(HASHBRACK);
3025 while (s < PL_bufend && SPACE_OR_TAB(*s))
3028 PL_tokenbuf[0] = '\0';
3029 if (d < PL_bufend && *d == '-') {
3030 PL_tokenbuf[0] = '-';
3032 while (d < PL_bufend && SPACE_OR_TAB(*d))
3035 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3036 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3038 while (d < PL_bufend && SPACE_OR_TAB(*d))
3041 char minus = (PL_tokenbuf[0] == '-');
3042 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3050 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3055 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3060 if (PL_oldoldbufptr == PL_last_lop)
3061 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3063 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3066 OPERATOR(HASHBRACK);
3067 /* This hack serves to disambiguate a pair of curlies
3068 * as being a block or an anon hash. Normally, expectation
3069 * determines that, but in cases where we're not in a
3070 * position to expect anything in particular (like inside
3071 * eval"") we have to resolve the ambiguity. This code
3072 * covers the case where the first term in the curlies is a
3073 * quoted string. Most other cases need to be explicitly
3074 * disambiguated by prepending a `+' before the opening
3075 * curly in order to force resolution as an anon hash.
3077 * XXX should probably propagate the outer expectation
3078 * into eval"" to rely less on this hack, but that could
3079 * potentially break current behavior of eval"".
3083 if (*s == '\'' || *s == '"' || *s == '`') {
3084 /* common case: get past first string, handling escapes */
3085 for (t++; t < PL_bufend && *t != *s;)
3086 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3090 else if (*s == 'q') {
3093 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3097 char open, close, term;
3100 while (t < PL_bufend && isSPACE(*t))
3104 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3108 for (t++; t < PL_bufend; t++) {
3109 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3111 else if (*t == open)
3115 for (t++; t < PL_bufend; t++) {
3116 if (*t == '\\' && t+1 < PL_bufend)
3118 else if (*t == close && --brackets <= 0)
3120 else if (*t == open)
3126 else if (isALNUM_lazy_if(t,UTF)) {
3128 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3131 while (t < PL_bufend && isSPACE(*t))
3133 /* if comma follows first term, call it an anon hash */
3134 /* XXX it could be a comma expression with loop modifiers */
3135 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3136 || (*t == '=' && t[1] == '>')))
3137 OPERATOR(HASHBRACK);
3138 if (PL_expect == XREF)
3141 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3147 yylval.ival = CopLINE(PL_curcop);
3148 if (isSPACE(*s) || *s == '#')
3149 PL_copline = NOLINE; /* invalidate current command line number */
3154 if (PL_lex_brackets <= 0)
3155 yyerror("Unmatched right curly bracket");
3157 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3158 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3159 PL_lex_formbrack = 0;
3160 if (PL_lex_state == LEX_INTERPNORMAL) {
3161 if (PL_lex_brackets == 0) {
3162 if (PL_expect & XFAKEBRACK) {
3163 PL_expect &= XENUMMASK;
3164 PL_lex_state = LEX_INTERPEND;
3166 return yylex(); /* ignore fake brackets */
3168 if (*s == '-' && s[1] == '>')
3169 PL_lex_state = LEX_INTERPENDMAYBE;
3170 else if (*s != '[' && *s != '{')
3171 PL_lex_state = LEX_INTERPEND;
3174 if (PL_expect & XFAKEBRACK) {
3175 PL_expect &= XENUMMASK;
3177 return yylex(); /* ignore fake brackets */
3187 if (PL_expect == XOPERATOR) {
3188 if (ckWARN(WARN_SEMICOLON)
3189 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3191 CopLINE_dec(PL_curcop);
3192 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3193 CopLINE_inc(PL_curcop);
3198 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3200 PL_expect = XOPERATOR;
3201 force_ident(PL_tokenbuf, '&');
3205 yylval.ival = (OPpENTERSUB_AMPER<<8);
3224 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3225 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3227 if (PL_expect == XSTATE && isALPHA(tmp) &&
3228 (s == PL_linestart+1 || s[-2] == '\n') )
3230 if (PL_in_eval && !PL_rsfp) {
3235 if (strnEQ(s,"=cut",4)) {
3249 PL_doextract = TRUE;
3252 if (PL_lex_brackets < PL_lex_formbrack) {
3254 #ifdef PERL_STRICT_CR
3255 for (t = s; SPACE_OR_TAB(*t); t++) ;
3257 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3259 if (*t == '\n' || *t == '#') {
3277 if (PL_expect != XOPERATOR) {
3278 if (s[1] != '<' && !strchr(s,'>'))
3281 s = scan_heredoc(s);
3283 s = scan_inputsymbol(s);
3284 TERM(sublex_start());
3289 SHop(OP_LEFT_SHIFT);
3303 SHop(OP_RIGHT_SHIFT);
3312 if (PL_expect == XOPERATOR) {
3313 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3316 return ','; /* grandfather non-comma-format format */
3320 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3321 PL_tokenbuf[0] = '@';
3322 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3323 sizeof PL_tokenbuf - 1, FALSE);
3324 if (PL_expect == XOPERATOR)
3325 no_op("Array length", s);
3326 if (!PL_tokenbuf[1])
3328 PL_expect = XOPERATOR;
3329 PL_pending_ident = '#';
3333 PL_tokenbuf[0] = '$';
3334 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3335 sizeof PL_tokenbuf - 1, FALSE);
3336 if (PL_expect == XOPERATOR)
3338 if (!PL_tokenbuf[1]) {
3340 yyerror("Final $ should be \\$ or $name");
3344 /* This kludge not intended to be bulletproof. */
3345 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3346 yylval.opval = newSVOP(OP_CONST, 0,
3347 newSViv(PL_compiling.cop_arybase));
3348 yylval.opval->op_private = OPpCONST_ARYBASE;
3354 if (PL_lex_state == LEX_NORMAL)
3357 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3360 PL_tokenbuf[0] = '@';
3361 if (ckWARN(WARN_SYNTAX)) {
3363 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3366 PL_bufptr = skipspace(PL_bufptr);
3367 while (t < PL_bufend && *t != ']')
3369 Perl_warner(aTHX_ WARN_SYNTAX,
3370 "Multidimensional syntax %.*s not supported",
3371 (t - PL_bufptr) + 1, PL_bufptr);
3375 else if (*s == '{') {
3376 PL_tokenbuf[0] = '%';
3377 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3378 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3380 char tmpbuf[sizeof PL_tokenbuf];
3382 for (t++; isSPACE(*t); t++) ;
3383 if (isIDFIRST_lazy_if(t,UTF)) {
3384 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3385 for (; isSPACE(*t); t++) ;
3386 if (*t == ';' && get_cv(tmpbuf, FALSE))
3387 Perl_warner(aTHX_ WARN_SYNTAX,
3388 "You need to quote \"%s\"", tmpbuf);
3394 PL_expect = XOPERATOR;
3395 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3396 bool islop = (PL_last_lop == PL_oldoldbufptr);
3397 if (!islop || PL_last_lop_op == OP_GREPSTART)
3398 PL_expect = XOPERATOR;
3399 else if (strchr("$@\"'`q", *s))
3400 PL_expect = XTERM; /* e.g. print $fh "foo" */
3401 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3402 PL_expect = XTERM; /* e.g. print $fh &sub */
3403 else if (isIDFIRST_lazy_if(s,UTF)) {
3404 char tmpbuf[sizeof PL_tokenbuf];
3405 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3406 if ((tmp = keyword(tmpbuf, len))) {
3407 /* binary operators exclude handle interpretations */
3419 PL_expect = XTERM; /* e.g. print $fh length() */
3424 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3425 if (gv && GvCVu(gv))
3426 PL_expect = XTERM; /* e.g. print $fh subr() */
3429 else if (isDIGIT(*s))
3430 PL_expect = XTERM; /* e.g. print $fh 3 */
3431 else if (*s == '.' && isDIGIT(s[1]))
3432 PL_expect = XTERM; /* e.g. print $fh .3 */
3433 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3434 PL_expect = XTERM; /* e.g. print $fh -1 */
3435 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3436 PL_expect = XTERM; /* print $fh <<"EOF" */
3438 PL_pending_ident = '$';
3442 if (PL_expect == XOPERATOR)
3444 PL_tokenbuf[0] = '@';
3445 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3446 if (!PL_tokenbuf[1]) {
3448 yyerror("Final @ should be \\@ or @name");
3451 if (PL_lex_state == LEX_NORMAL)
3453 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3455 PL_tokenbuf[0] = '%';
3457 /* Warn about @ where they meant $. */
3458 if (ckWARN(WARN_SYNTAX)) {
3459 if (*s == '[' || *s == '{') {
3461 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3463 if (*t == '}' || *t == ']') {
3465 PL_bufptr = skipspace(PL_bufptr);
3466 Perl_warner(aTHX_ WARN_SYNTAX,
3467 "Scalar value %.*s better written as $%.*s",
3468 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3473 PL_pending_ident = '@';
3476 case '/': /* may either be division or pattern */
3477 case '?': /* may either be conditional or pattern */
3478 if (PL_expect != XOPERATOR) {
3479 /* Disable warning on "study /blah/" */
3480 if (PL_oldoldbufptr == PL_last_uni
3481 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3482 || memNE(PL_last_uni, "study", 5)
3483 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3485 s = scan_pat(s,OP_MATCH);
3486 TERM(sublex_start());
3494 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3495 #ifdef PERL_STRICT_CR
3498 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3500 && (s == PL_linestart || s[-1] == '\n') )
3502 PL_lex_formbrack = 0;
3506 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3512 yylval.ival = OPf_SPECIAL;
3518 if (PL_expect != XOPERATOR)
3523 case '0': case '1': case '2': case '3': case '4':
3524 case '5': case '6': case '7': case '8': case '9':
3526 if (PL_expect == XOPERATOR)
3531 s = scan_str(s,FALSE,FALSE);
3532 if (PL_expect == XOPERATOR) {
3533 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3536 return ','; /* grandfather non-comma-format format */
3542 missingterm((char*)0);
3543 yylval.ival = OP_CONST;
3544 TERM(sublex_start());
3547 s = scan_str(s,FALSE,FALSE);
3548 if (PL_expect == XOPERATOR) {
3549 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3552 return ','; /* grandfather non-comma-format format */
3558 missingterm((char*)0);
3559 yylval.ival = OP_CONST;
3560 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3561 if (*d == '$' || *d == '@' || *d == '\\' || *d & 0x80) {
3562 yylval.ival = OP_STRINGIFY;
3566 TERM(sublex_start());
3569 s = scan_str(s,FALSE,FALSE);
3570 if (PL_expect == XOPERATOR)
3571 no_op("Backticks",s);
3573 missingterm((char*)0);
3574 yylval.ival = OP_BACKTICK;
3576 TERM(sublex_start());
3580 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3581 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3583 if (PL_expect == XOPERATOR)
3584 no_op("Backslash",s);
3588 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3592 while (isDIGIT(*start) || *start == '_')
3594 if (*start == '.' && isDIGIT(start[1])) {
3598 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3599 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3603 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3613 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3652 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3654 /* Some keywords can be followed by any delimiter, including ':' */
3655 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3656 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3657 (PL_tokenbuf[0] == 'q' &&
3658 strchr("qwxr", PL_tokenbuf[1])))));
3660 /* x::* is just a word, unless x is "CORE" */
3661 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3665 while (d < PL_bufend && isSPACE(*d))
3666 d++; /* no comments skipped here, or s### is misparsed */
3668 /* Is this a label? */
3669 if (!tmp && PL_expect == XSTATE
3670 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3672 yylval.pval = savepv(PL_tokenbuf);
3677 /* Check for keywords */
3678 tmp = keyword(PL_tokenbuf, len);
3680 /* Is this a word before a => operator? */
3681 if (*d == '=' && d[1] == '>') {
3683 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3684 yylval.opval->op_private = OPpCONST_BARE;
3688 if (tmp < 0) { /* second-class keyword? */
3689 GV *ogv = Nullgv; /* override (winner) */
3690 GV *hgv = Nullgv; /* hidden (loser) */
3691 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3693 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3696 if (GvIMPORTED_CV(gv))
3698 else if (! CvMETHOD(cv))
3702 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3703 (gv = *gvp) != (GV*)&PL_sv_undef &&
3704 GvCVu(gv) && GvIMPORTED_CV(gv))
3710 tmp = 0; /* overridden by import or by GLOBAL */
3713 && -tmp==KEY_lock /* XXX generalizable kludge */
3715 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3717 tmp = 0; /* any sub overrides "weak" keyword */
3719 else { /* no override */
3723 if (ckWARN(WARN_AMBIGUOUS) && hgv
3724 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3725 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3726 "Ambiguous call resolved as CORE::%s(), %s",
3727 GvENAME(hgv), "qualify as such or use &");
3734 default: /* not a keyword */
3737 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3739 /* Get the rest if it looks like a package qualifier */
3741 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3743 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3746 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3747 *s == '\'' ? "'" : "::");
3751 if (PL_expect == XOPERATOR) {
3752 if (PL_bufptr == PL_linestart) {
3753 CopLINE_dec(PL_curcop);
3754 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3755 CopLINE_inc(PL_curcop);
3758 no_op("Bareword",s);
3761 /* Look for a subroutine with this name in current package,
3762 unless name is "Foo::", in which case Foo is a bearword
3763 (and a package name). */
3766 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3768 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3769 Perl_warner(aTHX_ WARN_BAREWORD,
3770 "Bareword \"%s\" refers to nonexistent package",
3773 PL_tokenbuf[len] = '\0';
3780 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3783 /* if we saw a global override before, get the right name */
3786 sv = newSVpvn("CORE::GLOBAL::",14);
3787 sv_catpv(sv,PL_tokenbuf);
3790 sv = newSVpv(PL_tokenbuf,0);
3792 /* Presume this is going to be a bareword of some sort. */
3795 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3796 yylval.opval->op_private = OPpCONST_BARE;
3798 /* And if "Foo::", then that's what it certainly is. */
3803 /* See if it's the indirect object for a list operator. */
3805 if (PL_oldoldbufptr &&
3806 PL_oldoldbufptr < PL_bufptr &&
3807 (PL_oldoldbufptr == PL_last_lop
3808 || PL_oldoldbufptr == PL_last_uni) &&
3809 /* NO SKIPSPACE BEFORE HERE! */
3810 (PL_expect == XREF ||
3811 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3813 bool immediate_paren = *s == '(';
3815 /* (Now we can afford to cross potential line boundary.) */
3818 /* Two barewords in a row may indicate method call. */
3820 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3823 /* If not a declared subroutine, it's an indirect object. */
3824 /* (But it's an indir obj regardless for sort.) */
3826 if ((PL_last_lop_op == OP_SORT ||
3827 (!immediate_paren && (!gv || !GvCVu(gv)))) &&
3828 (PL_last_lop_op != OP_MAPSTART &&
3829 PL_last_lop_op != OP_GREPSTART))
3831 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3837 PL_expect = XOPERATOR;
3840 /* Is this a word before a => operator? */
3841 if (*s == '=' && s[1] == '>') {
3843 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
3847 /* If followed by a paren, it's certainly a subroutine. */
3850 if (gv && GvCVu(gv)) {
3851 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
3852 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
3857 PL_nextval[PL_nexttoke].opval = yylval.opval;
3858 PL_expect = XOPERATOR;
3864 /* If followed by var or block, call it a method (unless sub) */
3866 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3867 PL_last_lop = PL_oldbufptr;
3868 PL_last_lop_op = OP_METHOD;
3872 /* If followed by a bareword, see if it looks like indir obj. */
3874 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
3877 /* Not a method, so call it a subroutine (if defined) */
3879 if (gv && GvCVu(gv)) {
3881 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
3882 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3883 "Ambiguous use of -%s resolved as -&%s()",
3884 PL_tokenbuf, PL_tokenbuf);
3885 /* Check for a constant sub */
3887 if ((sv = cv_const_sv(cv))) {
3889 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3890 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3891 yylval.opval->op_private = 0;
3895 /* Resolve to GV now. */
3896 op_free(yylval.opval);
3897 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3898 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
3899 PL_last_lop = PL_oldbufptr;
3900 PL_last_lop_op = OP_ENTERSUB;
3901 /* Is there a prototype? */
3904 char *proto = SvPV((SV*)cv, len);
3907 if (strEQ(proto, "$"))
3909 if (*proto == '&' && *s == '{') {
3910 sv_setpv(PL_subname,"__ANON__");
3914 PL_nextval[PL_nexttoke].opval = yylval.opval;
3920 /* Call it a bare word */
3922 if (PL_hints & HINT_STRICT_SUBS)
3923 yylval.opval->op_private |= OPpCONST_STRICT;
3926 if (ckWARN(WARN_RESERVED)) {
3927 if (lastchar != '-') {
3928 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
3930 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
3937 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
3938 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3939 "Operator or semicolon missing before %c%s",
3940 lastchar, PL_tokenbuf);
3941 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3942 "Ambiguous use of %c resolved as operator %c",
3943 lastchar, lastchar);
3949 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3950 newSVpv(CopFILE(PL_curcop),0));
3954 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3955 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
3958 case KEY___PACKAGE__:
3959 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3961 ? newSVsv(PL_curstname)
3970 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
3971 char *pname = "main";
3972 if (PL_tokenbuf[2] == 'D')
3973 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
3974 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
3977 GvIOp(gv) = newIO();
3978 IoIFP(GvIOp(gv)) = PL_rsfp;
3979 #if defined(HAS_FCNTL) && defined(F_SETFD)
3981 int fd = PerlIO_fileno(PL_rsfp);
3982 fcntl(fd,F_SETFD,fd >= 3);
3985 /* Mark this internal pseudo-handle as clean */
3986 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3988 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
3989 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
3990 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
3992 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
3993 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
3994 /* if the script was opened in binmode, we need to revert
3995 * it to text mode for compatibility; but only iff it has CRs
3996 * XXX this is a questionable hack at best. */
3997 if (PL_bufend-PL_bufptr > 2
3998 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
4001 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
4002 loc = PerlIO_tell(PL_rsfp);
4003 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4005 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4006 #if defined(__BORLANDC__)
4007 /* XXX see note in do_binmode() */
4008 ((FILE*)PL_rsfp)->flags |= _F_BIN;
4011 PerlIO_seek(PL_rsfp, loc, 0);
4026 if (PL_expect == XSTATE) {
4033 if (*s == ':' && s[1] == ':') {
4036 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4037 if (!(tmp = keyword(PL_tokenbuf, len)))
4038 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4052 LOP(OP_ACCEPT,XTERM);
4058 LOP(OP_ATAN2,XTERM);
4064 LOP(OP_BINMODE,XTERM);
4067 LOP(OP_BLESS,XTERM);
4076 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4093 if (!PL_cryptseen) {
4094 PL_cryptseen = TRUE;
4098 LOP(OP_CRYPT,XTERM);
4101 if (ckWARN(WARN_CHMOD)) {
4102 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4103 if (*d != '0' && isDIGIT(*d))
4104 Perl_warner(aTHX_ WARN_CHMOD,
4105 "chmod() mode argument is missing initial 0");
4107 LOP(OP_CHMOD,XTERM);
4110 LOP(OP_CHOWN,XTERM);
4113 LOP(OP_CONNECT,XTERM);
4129 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4133 PL_hints |= HINT_BLOCK_SCOPE;
4143 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4144 LOP(OP_DBMOPEN,XTERM);
4150 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4157 yylval.ival = CopLINE(PL_curcop);
4171 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4172 UNIBRACK(OP_ENTEREVAL);
4187 case KEY_endhostent:
4193 case KEY_endservent:
4196 case KEY_endprotoent:
4207 yylval.ival = CopLINE(PL_curcop);
4209 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4211 if ((PL_bufend - p) >= 3 &&
4212 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4214 else if ((PL_bufend - p) >= 4 &&
4215 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4218 if (isIDFIRST_lazy_if(p,UTF)) {
4219 p = scan_ident(p, PL_bufend,
4220 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4224 Perl_croak(aTHX_ "Missing $ on loop variable");
4229 LOP(OP_FORMLINE,XTERM);
4235 LOP(OP_FCNTL,XTERM);
4241 LOP(OP_FLOCK,XTERM);
4250 LOP(OP_GREPSTART, XREF);
4253 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4268 case KEY_getpriority:
4269 LOP(OP_GETPRIORITY,XTERM);
4271 case KEY_getprotobyname:
4274 case KEY_getprotobynumber:
4275 LOP(OP_GPBYNUMBER,XTERM);
4277 case KEY_getprotoent:
4289 case KEY_getpeername:
4290 UNI(OP_GETPEERNAME);
4292 case KEY_gethostbyname:
4295 case KEY_gethostbyaddr:
4296 LOP(OP_GHBYADDR,XTERM);
4298 case KEY_gethostent:
4301 case KEY_getnetbyname:
4304 case KEY_getnetbyaddr:
4305 LOP(OP_GNBYADDR,XTERM);
4310 case KEY_getservbyname:
4311 LOP(OP_GSBYNAME,XTERM);
4313 case KEY_getservbyport:
4314 LOP(OP_GSBYPORT,XTERM);
4316 case KEY_getservent:
4319 case KEY_getsockname:
4320 UNI(OP_GETSOCKNAME);
4322 case KEY_getsockopt:
4323 LOP(OP_GSOCKOPT,XTERM);
4345 yylval.ival = CopLINE(PL_curcop);
4349 LOP(OP_INDEX,XTERM);
4355 LOP(OP_IOCTL,XTERM);
4367 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4399 LOP(OP_LISTEN,XTERM);
4408 s = scan_pat(s,OP_MATCH);
4409 TERM(sublex_start());
4412 LOP(OP_MAPSTART, XREF);
4415 LOP(OP_MKDIR,XTERM);
4418 LOP(OP_MSGCTL,XTERM);
4421 LOP(OP_MSGGET,XTERM);
4424 LOP(OP_MSGRCV,XTERM);
4427 LOP(OP_MSGSND,XTERM);
4433 if (isIDFIRST_lazy_if(s,UTF)) {
4434 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4435 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4437 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4438 if (!PL_in_my_stash) {
4441 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4449 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4456 if (PL_expect != XSTATE)
4457 yyerror("\"no\" not allowed in expression");
4458 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4459 s = force_version(s);
4464 if (*s == '(' || (s = skipspace(s), *s == '('))
4471 if (isIDFIRST_lazy_if(s,UTF)) {
4473 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4475 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4476 Perl_warner(aTHX_ WARN_PRECEDENCE,
4477 "Precedence problem: open %.*s should be open(%.*s)",
4483 yylval.ival = OP_OR;
4493 LOP(OP_OPEN_DIR,XTERM);
4496 checkcomma(s,PL_tokenbuf,"filehandle");
4500 checkcomma(s,PL_tokenbuf,"filehandle");
4519 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4523 LOP(OP_PIPE_OP,XTERM);
4526 s = scan_str(s,FALSE,FALSE);
4528 missingterm((char*)0);
4529 yylval.ival = OP_CONST;
4530 TERM(sublex_start());
4536 s = scan_str(s,FALSE,FALSE);
4538 missingterm((char*)0);
4540 if (SvCUR(PL_lex_stuff)) {
4543 d = SvPV_force(PL_lex_stuff, len);
4545 for (; isSPACE(*d) && len; --len, ++d) ;
4548 if (!warned && ckWARN(WARN_QW)) {
4549 for (; !isSPACE(*d) && len; --len, ++d) {
4551 Perl_warner(aTHX_ WARN_QW,
4552 "Possible attempt to separate words with commas");
4555 else if (*d == '#') {
4556 Perl_warner(aTHX_ WARN_QW,
4557 "Possible attempt to put comments in qw() list");
4563 for (; !isSPACE(*d) && len; --len, ++d) ;
4565 words = append_elem(OP_LIST, words,
4566 newSVOP(OP_CONST, 0, tokeq(newSVpvn(b, d-b))));
4570 PL_nextval[PL_nexttoke].opval = words;
4575 SvREFCNT_dec(PL_lex_stuff);
4576 PL_lex_stuff = Nullsv;
4581 s = scan_str(s,FALSE,FALSE);
4583 missingterm((char*)0);
4584 yylval.ival = OP_STRINGIFY;
4585 if (SvIVX(PL_lex_stuff) == '\'')
4586 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4587 TERM(sublex_start());
4590 s = scan_pat(s,OP_QR);
4591 TERM(sublex_start());
4594 s = scan_str(s,FALSE,FALSE);
4596 missingterm((char*)0);
4597 yylval.ival = OP_BACKTICK;
4599 TERM(sublex_start());
4606 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4607 s = force_version(s);
4610 *PL_tokenbuf = '\0';
4611 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4612 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4613 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4615 yyerror("<> should be quotes");
4623 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4627 LOP(OP_RENAME,XTERM);
4636 LOP(OP_RINDEX,XTERM);
4659 LOP(OP_REVERSE,XTERM);
4670 TERM(sublex_start());
4672 TOKEN(1); /* force error */
4681 LOP(OP_SELECT,XTERM);
4687 LOP(OP_SEMCTL,XTERM);
4690 LOP(OP_SEMGET,XTERM);
4693 LOP(OP_SEMOP,XTERM);
4699 LOP(OP_SETPGRP,XTERM);
4701 case KEY_setpriority:
4702 LOP(OP_SETPRIORITY,XTERM);
4704 case KEY_sethostent:
4710 case KEY_setservent:
4713 case KEY_setprotoent:
4723 LOP(OP_SEEKDIR,XTERM);
4725 case KEY_setsockopt:
4726 LOP(OP_SSOCKOPT,XTERM);
4732 LOP(OP_SHMCTL,XTERM);
4735 LOP(OP_SHMGET,XTERM);
4738 LOP(OP_SHMREAD,XTERM);
4741 LOP(OP_SHMWRITE,XTERM);
4744 LOP(OP_SHUTDOWN,XTERM);
4753 LOP(OP_SOCKET,XTERM);
4755 case KEY_socketpair:
4756 LOP(OP_SOCKPAIR,XTERM);
4759 checkcomma(s,PL_tokenbuf,"subroutine name");
4761 if (*s == ';' || *s == ')') /* probably a close */
4762 Perl_croak(aTHX_ "sort is now a reserved word");
4764 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4768 LOP(OP_SPLIT,XTERM);
4771 LOP(OP_SPRINTF,XTERM);
4774 LOP(OP_SPLICE,XTERM);
4789 LOP(OP_SUBSTR,XTERM);
4795 char tmpbuf[sizeof PL_tokenbuf];
4797 expectation attrful;
4798 bool have_name, have_proto;
4803 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4804 (*s == ':' && s[1] == ':'))
4807 attrful = XATTRBLOCK;
4808 /* remember buffer pos'n for later force_word */
4809 tboffset = s - PL_oldbufptr;
4810 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4811 if (strchr(tmpbuf, ':'))
4812 sv_setpv(PL_subname, tmpbuf);
4814 sv_setsv(PL_subname,PL_curstname);
4815 sv_catpvn(PL_subname,"::",2);
4816 sv_catpvn(PL_subname,tmpbuf,len);
4823 Perl_croak(aTHX_ "Missing name in \"my sub\"");
4824 PL_expect = XTERMBLOCK;
4825 attrful = XATTRTERM;
4826 sv_setpv(PL_subname,"?");
4830 if (key == KEY_format) {
4832 PL_lex_formbrack = PL_lex_brackets + 1;
4834 (void) force_word(PL_oldbufptr + tboffset, WORD,
4839 /* Look for a prototype */
4843 s = scan_str(s,FALSE,FALSE);
4846 SvREFCNT_dec(PL_lex_stuff);
4847 PL_lex_stuff = Nullsv;
4848 Perl_croak(aTHX_ "Prototype not terminated");
4851 d = SvPVX(PL_lex_stuff);
4853 for (p = d; *p; ++p) {
4858 SvCUR(PL_lex_stuff) = tmp;
4866 if (*s == ':' && s[1] != ':')
4867 PL_expect = attrful;
4870 PL_nextval[PL_nexttoke].opval =
4871 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4872 PL_lex_stuff = Nullsv;
4876 sv_setpv(PL_subname,"__ANON__");
4879 (void) force_word(PL_oldbufptr + tboffset, WORD,
4888 LOP(OP_SYSTEM,XREF);
4891 LOP(OP_SYMLINK,XTERM);
4894 LOP(OP_SYSCALL,XTERM);
4897 LOP(OP_SYSOPEN,XTERM);
4900 LOP(OP_SYSSEEK,XTERM);
4903 LOP(OP_SYSREAD,XTERM);
4906 LOP(OP_SYSWRITE,XTERM);
4910 TERM(sublex_start());
4931 LOP(OP_TRUNCATE,XTERM);
4943 yylval.ival = CopLINE(PL_curcop);
4947 yylval.ival = CopLINE(PL_curcop);
4951 LOP(OP_UNLINK,XTERM);
4957 LOP(OP_UNPACK,XTERM);
4960 LOP(OP_UTIME,XTERM);
4963 if (ckWARN(WARN_UMASK)) {
4964 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4965 if (*d != '0' && isDIGIT(*d))
4966 Perl_warner(aTHX_ WARN_UMASK,
4967 "umask: argument is missing initial 0");
4972 LOP(OP_UNSHIFT,XTERM);
4975 if (PL_expect != XSTATE)
4976 yyerror("\"use\" not allowed in expression");
4978 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4979 s = force_version(s);
4980 if (*s == ';' || (s = skipspace(s), *s == ';')) {
4981 PL_nextval[PL_nexttoke].opval = Nullop;
4986 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4987 s = force_version(s);
4999 yylval.ival = CopLINE(PL_curcop);
5003 PL_hints |= HINT_BLOCK_SCOPE;
5010 LOP(OP_WAITPID,XTERM);
5018 static char ctl_l[2];
5020 if (ctl_l[0] == '\0')
5021 ctl_l[0] = toCTRL('L');
5022 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5025 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5030 if (PL_expect == XOPERATOR)
5036 yylval.ival = OP_XOR;
5041 TERM(sublex_start());
5046 #pragma segment Main
5050 Perl_keyword(pTHX_ register char *d, I32 len)
5055 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5056 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5057 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5058 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5059 if (strEQ(d,"__END__")) return KEY___END__;
5063 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5068 if (strEQ(d,"and")) return -KEY_and;
5069 if (strEQ(d,"abs")) return -KEY_abs;
5072 if (strEQ(d,"alarm")) return -KEY_alarm;
5073 if (strEQ(d,"atan2")) return -KEY_atan2;
5076 if (strEQ(d,"accept")) return -KEY_accept;
5081 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5084 if (strEQ(d,"bless")) return -KEY_bless;
5085 if (strEQ(d,"bind")) return -KEY_bind;
5086 if (strEQ(d,"binmode")) return -KEY_binmode;
5089 if (strEQ(d,"CORE")) return -KEY_CORE;
5090 if (strEQ(d,"CHECK")) return KEY_CHECK;
5095 if (strEQ(d,"cmp")) return -KEY_cmp;
5096 if (strEQ(d,"chr")) return -KEY_chr;
5097 if (strEQ(d,"cos")) return -KEY_cos;
5100 if (strEQ(d,"chop")) return -KEY_chop;
5103 if (strEQ(d,"close")) return -KEY_close;
5104 if (strEQ(d,"chdir")) return -KEY_chdir;
5105 if (strEQ(d,"chomp")) return -KEY_chomp;
5106 if (strEQ(d,"chmod")) return -KEY_chmod;
5107 if (strEQ(d,"chown")) return -KEY_chown;
5108 if (strEQ(d,"crypt")) return -KEY_crypt;
5111 if (strEQ(d,"chroot")) return -KEY_chroot;
5112 if (strEQ(d,"caller")) return -KEY_caller;
5115 if (strEQ(d,"connect")) return -KEY_connect;
5118 if (strEQ(d,"closedir")) return -KEY_closedir;
5119 if (strEQ(d,"continue")) return -KEY_continue;
5124 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5129 if (strEQ(d,"do")) return KEY_do;
5132 if (strEQ(d,"die")) return -KEY_die;
5135 if (strEQ(d,"dump")) return -KEY_dump;
5138 if (strEQ(d,"delete")) return KEY_delete;
5141 if (strEQ(d,"defined")) return KEY_defined;
5142 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5145 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5150 if (strEQ(d,"END")) return KEY_END;
5155 if (strEQ(d,"eq")) return -KEY_eq;
5158 if (strEQ(d,"eof")) return -KEY_eof;
5159 if (strEQ(d,"exp")) return -KEY_exp;
5162 if (strEQ(d,"else")) return KEY_else;
5163 if (strEQ(d,"exit")) return -KEY_exit;
5164 if (strEQ(d,"eval")) return KEY_eval;
5165 if (strEQ(d,"exec")) return -KEY_exec;
5166 if (strEQ(d,"each")) return KEY_each;
5169 if (strEQ(d,"elsif")) return KEY_elsif;
5172 if (strEQ(d,"exists")) return KEY_exists;
5173 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5176 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5177 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5180 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5183 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5184 if (strEQ(d,"endservent")) return -KEY_endservent;
5187 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5194 if (strEQ(d,"for")) return KEY_for;
5197 if (strEQ(d,"fork")) return -KEY_fork;
5200 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5201 if (strEQ(d,"flock")) return -KEY_flock;
5204 if (strEQ(d,"format")) return KEY_format;
5205 if (strEQ(d,"fileno")) return -KEY_fileno;
5208 if (strEQ(d,"foreach")) return KEY_foreach;
5211 if (strEQ(d,"formline")) return -KEY_formline;
5216 if (strnEQ(d,"get",3)) {
5221 if (strEQ(d,"ppid")) return -KEY_getppid;
5222 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5225 if (strEQ(d,"pwent")) return -KEY_getpwent;
5226 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5227 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5230 if (strEQ(d,"peername")) return -KEY_getpeername;
5231 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5232 if (strEQ(d,"priority")) return -KEY_getpriority;
5235 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5238 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5242 else if (*d == 'h') {
5243 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5244 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5245 if (strEQ(d,"hostent")) return -KEY_gethostent;
5247 else if (*d == 'n') {
5248 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5249 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5250 if (strEQ(d,"netent")) return -KEY_getnetent;
5252 else if (*d == 's') {
5253 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5254 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5255 if (strEQ(d,"servent")) return -KEY_getservent;
5256 if (strEQ(d,"sockname")) return -KEY_getsockname;
5257 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5259 else if (*d == 'g') {
5260 if (strEQ(d,"grent")) return -KEY_getgrent;
5261 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5262 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5264 else if (*d == 'l') {
5265 if (strEQ(d,"login")) return -KEY_getlogin;
5267 else if (strEQ(d,"c")) return -KEY_getc;
5272 if (strEQ(d,"gt")) return -KEY_gt;
5273 if (strEQ(d,"ge")) return -KEY_ge;
5276 if (strEQ(d,"grep")) return KEY_grep;
5277 if (strEQ(d,"goto")) return KEY_goto;
5278 if (strEQ(d,"glob")) return KEY_glob;
5281 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5286 if (strEQ(d,"hex")) return -KEY_hex;
5289 if (strEQ(d,"INIT")) return KEY_INIT;
5294 if (strEQ(d,"if")) return KEY_if;
5297 if (strEQ(d,"int")) return -KEY_int;
5300 if (strEQ(d,"index")) return -KEY_index;
5301 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5306 if (strEQ(d,"join")) return -KEY_join;
5310 if (strEQ(d,"keys")) return KEY_keys;
5311 if (strEQ(d,"kill")) return -KEY_kill;
5317 if (strEQ(d,"lt")) return -KEY_lt;
5318 if (strEQ(d,"le")) return -KEY_le;
5319 if (strEQ(d,"lc")) return -KEY_lc;
5322 if (strEQ(d,"log")) return -KEY_log;
5325 if (strEQ(d,"last")) return KEY_last;
5326 if (strEQ(d,"link")) return -KEY_link;
5327 if (strEQ(d,"lock")) return -KEY_lock;
5330 if (strEQ(d,"local")) return KEY_local;
5331 if (strEQ(d,"lstat")) return -KEY_lstat;
5334 if (strEQ(d,"length")) return -KEY_length;
5335 if (strEQ(d,"listen")) return -KEY_listen;
5338 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5341 if (strEQ(d,"localtime")) return -KEY_localtime;
5347 case 1: return KEY_m;
5349 if (strEQ(d,"my")) return KEY_my;
5352 if (strEQ(d,"map")) return KEY_map;
5355 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5358 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5359 if (strEQ(d,"msgget")) return -KEY_msgget;
5360 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5361 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5366 if (strEQ(d,"next")) return KEY_next;
5367 if (strEQ(d,"ne")) return -KEY_ne;
5368 if (strEQ(d,"not")) return -KEY_not;
5369 if (strEQ(d,"no")) return KEY_no;
5374 if (strEQ(d,"or")) return -KEY_or;
5377 if (strEQ(d,"ord")) return -KEY_ord;
5378 if (strEQ(d,"oct")) return -KEY_oct;
5379 if (strEQ(d,"our")) return KEY_our;
5382 if (strEQ(d,"open")) return -KEY_open;
5385 if (strEQ(d,"opendir")) return -KEY_opendir;
5392 if (strEQ(d,"pop")) return KEY_pop;
5393 if (strEQ(d,"pos")) return KEY_pos;
5396 if (strEQ(d,"push")) return KEY_push;
5397 if (strEQ(d,"pack")) return -KEY_pack;
5398 if (strEQ(d,"pipe")) return -KEY_pipe;
5401 if (strEQ(d,"print")) return KEY_print;
5404 if (strEQ(d,"printf")) return KEY_printf;
5407 if (strEQ(d,"package")) return KEY_package;
5410 if (strEQ(d,"prototype")) return KEY_prototype;
5415 if (strEQ(d,"q")) return KEY_q;
5416 if (strEQ(d,"qr")) return KEY_qr;
5417 if (strEQ(d,"qq")) return KEY_qq;
5418 if (strEQ(d,"qw")) return KEY_qw;
5419 if (strEQ(d,"qx")) return KEY_qx;
5421 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5426 if (strEQ(d,"ref")) return -KEY_ref;
5429 if (strEQ(d,"read")) return -KEY_read;
5430 if (strEQ(d,"rand")) return -KEY_rand;
5431 if (strEQ(d,"recv")) return -KEY_recv;
5432 if (strEQ(d,"redo")) return KEY_redo;
5435 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5436 if (strEQ(d,"reset")) return -KEY_reset;
5439 if (strEQ(d,"return")) return KEY_return;
5440 if (strEQ(d,"rename")) return -KEY_rename;
5441 if (strEQ(d,"rindex")) return -KEY_rindex;
5444 if (strEQ(d,"require")) return -KEY_require;
5445 if (strEQ(d,"reverse")) return -KEY_reverse;
5446 if (strEQ(d,"readdir")) return -KEY_readdir;
5449 if (strEQ(d,"readlink")) return -KEY_readlink;
5450 if (strEQ(d,"readline")) return -KEY_readline;
5451 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5454 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5460 case 0: return KEY_s;
5462 if (strEQ(d,"scalar")) return KEY_scalar;
5467 if (strEQ(d,"seek")) return -KEY_seek;
5468 if (strEQ(d,"send")) return -KEY_send;
5471 if (strEQ(d,"semop")) return -KEY_semop;
5474 if (strEQ(d,"select")) return -KEY_select;
5475 if (strEQ(d,"semctl")) return -KEY_semctl;
5476 if (strEQ(d,"semget")) return -KEY_semget;
5479 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5480 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5483 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5484 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5487 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5490 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5491 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5492 if (strEQ(d,"setservent")) return -KEY_setservent;
5495 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5496 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5503 if (strEQ(d,"shift")) return KEY_shift;
5506 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5507 if (strEQ(d,"shmget")) return -KEY_shmget;
5510 if (strEQ(d,"shmread")) return -KEY_shmread;
5513 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5514 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5519 if (strEQ(d,"sin")) return -KEY_sin;
5522 if (strEQ(d,"sleep")) return -KEY_sleep;
5525 if (strEQ(d,"sort")) return KEY_sort;
5526 if (strEQ(d,"socket")) return -KEY_socket;
5527 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5530 if (strEQ(d,"split")) return KEY_split;
5531 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5532 if (strEQ(d,"splice")) return KEY_splice;
5535 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5538 if (strEQ(d,"srand")) return -KEY_srand;
5541 if (strEQ(d,"stat")) return -KEY_stat;
5542 if (strEQ(d,"study")) return KEY_study;
5545 if (strEQ(d,"substr")) return -KEY_substr;
5546 if (strEQ(d,"sub")) return KEY_sub;
5551 if (strEQ(d,"system")) return -KEY_system;
5554 if (strEQ(d,"symlink")) return -KEY_symlink;
5555 if (strEQ(d,"syscall")) return -KEY_syscall;
5556 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5557 if (strEQ(d,"sysread")) return -KEY_sysread;
5558 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5561 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5570 if (strEQ(d,"tr")) return KEY_tr;
5573 if (strEQ(d,"tie")) return KEY_tie;
5576 if (strEQ(d,"tell")) return -KEY_tell;
5577 if (strEQ(d,"tied")) return KEY_tied;
5578 if (strEQ(d,"time")) return -KEY_time;
5581 if (strEQ(d,"times")) return -KEY_times;
5584 if (strEQ(d,"telldir")) return -KEY_telldir;
5587 if (strEQ(d,"truncate")) return -KEY_truncate;
5594 if (strEQ(d,"uc")) return -KEY_uc;
5597 if (strEQ(d,"use")) return KEY_use;
5600 if (strEQ(d,"undef")) return KEY_undef;
5601 if (strEQ(d,"until")) return KEY_until;
5602 if (strEQ(d,"untie")) return KEY_untie;
5603 if (strEQ(d,"utime")) return -KEY_utime;
5604 if (strEQ(d,"umask")) return -KEY_umask;
5607 if (strEQ(d,"unless")) return KEY_unless;
5608 if (strEQ(d,"unpack")) return -KEY_unpack;
5609 if (strEQ(d,"unlink")) return -KEY_unlink;
5612 if (strEQ(d,"unshift")) return KEY_unshift;
5613 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5618 if (strEQ(d,"values")) return -KEY_values;
5619 if (strEQ(d,"vec")) return -KEY_vec;
5624 if (strEQ(d,"warn")) return -KEY_warn;
5625 if (strEQ(d,"wait")) return -KEY_wait;
5628 if (strEQ(d,"while")) return KEY_while;
5629 if (strEQ(d,"write")) return -KEY_write;
5632 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5635 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5640 if (len == 1) return -KEY_x;
5641 if (strEQ(d,"xor")) return -KEY_xor;
5644 if (len == 1) return KEY_y;
5653 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5657 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5658 dTHR; /* only for ckWARN */
5659 if (ckWARN(WARN_SYNTAX)) {
5661 for (w = s+2; *w && level; w++) {
5668 for (; *w && isSPACE(*w); w++) ;
5669 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5670 Perl_warner(aTHX_ WARN_SYNTAX,
5671 "%s (...) interpreted as function",name);
5674 while (s < PL_bufend && isSPACE(*s))
5678 while (s < PL_bufend && isSPACE(*s))
5680 if (isIDFIRST_lazy_if(s,UTF)) {
5682 while (isALNUM_lazy_if(s,UTF))
5684 while (s < PL_bufend && isSPACE(*s))
5689 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5693 Perl_croak(aTHX_ "No comma allowed after %s", what);
5698 /* Either returns sv, or mortalizes sv and returns a new SV*.
5699 Best used as sv=new_constant(..., sv, ...).
5700 If s, pv are NULL, calls subroutine with one argument,
5701 and type is used with error messages only. */
5704 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5708 HV *table = GvHV(PL_hintgv); /* ^H */
5712 const char *why1, *why2, *why3;
5714 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5717 why1 = "%^H is not consistent";
5718 why2 = strEQ(key,"charnames")
5719 ? " (missing \"use charnames ...\"?)"
5723 msg = Perl_newSVpvf(aTHX_ "constant(%s): %s%s%s",
5724 (type ? type: "undef"), why1, why2, why3);
5725 yyerror(SvPVX(msg));
5729 cvp = hv_fetch(table, key, strlen(key), FALSE);
5730 if (!cvp || !SvOK(*cvp)) {
5733 why3 = "} is not defined";
5736 sv_2mortal(sv); /* Parent created it permanently */
5739 pv = sv_2mortal(newSVpvn(s, len));
5741 typesv = sv_2mortal(newSVpv(type, 0));
5743 typesv = &PL_sv_undef;
5745 PUSHSTACKi(PERLSI_OVERLOAD);
5757 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5761 /* Check the eval first */
5762 if (!PL_in_eval && SvTRUE(ERRSV)) {
5764 sv_catpv(ERRSV, "Propagated");
5765 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5767 res = SvREFCNT_inc(sv);
5771 (void)SvREFCNT_inc(res);
5780 why1 = "Call to &{$^H{";
5782 why3 = "}} did not return a defined value";
5791 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5793 register char *d = dest;
5794 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5797 Perl_croak(aTHX_ ident_too_long);
5798 if (isALNUM(*s)) /* UTF handled below */
5800 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5805 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5809 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5810 char *t = s + UTF8SKIP(s);
5811 while (*t & 0x80 && is_utf8_mark((U8*)t))
5813 if (d + (t - s) > e)
5814 Perl_croak(aTHX_ ident_too_long);
5815 Copy(s, d, t - s, char);
5828 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
5838 e = d + destlen - 3; /* two-character token, ending NUL */
5840 while (isDIGIT(*s)) {
5842 Perl_croak(aTHX_ ident_too_long);
5849 Perl_croak(aTHX_ ident_too_long);
5850 if (isALNUM(*s)) /* UTF handled below */
5852 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
5857 else if (*s == ':' && s[1] == ':') {
5861 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5862 char *t = s + UTF8SKIP(s);
5863 while (*t & 0x80 && is_utf8_mark((U8*)t))
5865 if (d + (t - s) > e)
5866 Perl_croak(aTHX_ ident_too_long);
5867 Copy(s, d, t - s, char);
5878 if (PL_lex_state != LEX_NORMAL)
5879 PL_lex_state = LEX_INTERPENDMAYBE;
5882 if (*s == '$' && s[1] &&
5883 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5896 if (*d == '^' && *s && isCONTROLVAR(*s)) {
5901 if (isSPACE(s[-1])) {
5904 if (!SPACE_OR_TAB(ch)) {
5910 if (isIDFIRST_lazy_if(d,UTF)) {
5914 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
5916 while (e < send && *e & 0x80 && is_utf8_mark((U8*)e))
5919 Copy(s, d, e - s, char);
5924 while ((isALNUM(*s) || *s == ':') && d < e)
5927 Perl_croak(aTHX_ ident_too_long);
5930 while (s < send && SPACE_OR_TAB(*s)) s++;
5931 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
5932 dTHR; /* only for ckWARN */
5933 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
5934 const char *brack = *s == '[' ? "[...]" : "{...}";
5935 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5936 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
5937 funny, dest, brack, funny, dest, brack);
5940 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
5944 /* Handle extended ${^Foo} variables
5945 * 1999-02-27 mjd-perl-patch@plover.com */
5946 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
5950 while (isALNUM(*s) && d < e) {
5954 Perl_croak(aTHX_ ident_too_long);
5959 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
5960 PL_lex_state = LEX_INTERPEND;
5963 if (PL_lex_state == LEX_NORMAL) {
5964 dTHR; /* only for ckWARN */
5965 if (ckWARN(WARN_AMBIGUOUS) &&
5966 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
5968 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5969 "Ambiguous use of %c{%s} resolved to %c%s",
5970 funny, dest, funny, dest);
5975 s = bracket; /* let the parser handle it */
5979 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
5980 PL_lex_state = LEX_INTERPEND;
5985 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
5990 *pmfl |= PMf_GLOBAL;
5992 *pmfl |= PMf_CONTINUE;
5996 *pmfl |= PMf_MULTILINE;
5998 *pmfl |= PMf_SINGLELINE;
6000 *pmfl |= PMf_EXTENDED;
6004 S_scan_pat(pTHX_ char *start, I32 type)
6009 s = scan_str(start,FALSE,FALSE);
6012 SvREFCNT_dec(PL_lex_stuff);
6013 PL_lex_stuff = Nullsv;
6014 Perl_croak(aTHX_ "Search pattern not terminated");
6017 pm = (PMOP*)newPMOP(type, 0);
6018 if (PL_multi_open == '?')
6019 pm->op_pmflags |= PMf_ONCE;
6021 while (*s && strchr("iomsx", *s))
6022 pmflag(&pm->op_pmflags,*s++);
6025 while (*s && strchr("iogcmsx", *s))
6026 pmflag(&pm->op_pmflags,*s++);
6028 pm->op_pmpermflags = pm->op_pmflags;
6030 PL_lex_op = (OP*)pm;
6031 yylval.ival = OP_MATCH;
6036 S_scan_subst(pTHX_ char *start)
6043 yylval.ival = OP_NULL;
6045 s = scan_str(start,FALSE,FALSE);
6049 SvREFCNT_dec(PL_lex_stuff);
6050 PL_lex_stuff = Nullsv;
6051 Perl_croak(aTHX_ "Substitution pattern not terminated");
6054 if (s[-1] == PL_multi_open)
6057 first_start = PL_multi_start;
6058 s = scan_str(s,FALSE,FALSE);
6061 SvREFCNT_dec(PL_lex_stuff);
6062 PL_lex_stuff = Nullsv;
6064 SvREFCNT_dec(PL_lex_repl);
6065 PL_lex_repl = Nullsv;
6066 Perl_croak(aTHX_ "Substitution replacement not terminated");
6068 PL_multi_start = first_start; /* so whole substitution is taken together */
6070 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6076 else if (strchr("iogcmsx", *s))
6077 pmflag(&pm->op_pmflags,*s++);
6084 PL_sublex_info.super_bufptr = s;
6085 PL_sublex_info.super_bufend = PL_bufend;
6087 pm->op_pmflags |= PMf_EVAL;
6088 repl = newSVpvn("",0);
6090 sv_catpv(repl, es ? "eval " : "do ");
6091 sv_catpvn(repl, "{ ", 2);
6092 sv_catsv(repl, PL_lex_repl);
6093 sv_catpvn(repl, " };", 2);
6095 SvREFCNT_dec(PL_lex_repl);
6099 pm->op_pmpermflags = pm->op_pmflags;
6100 PL_lex_op = (OP*)pm;
6101 yylval.ival = OP_SUBST;
6106 S_scan_trans(pTHX_ char *start)
6117 yylval.ival = OP_NULL;
6119 s = scan_str(start,FALSE,FALSE);
6122 SvREFCNT_dec(PL_lex_stuff);
6123 PL_lex_stuff = Nullsv;
6124 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6126 if (s[-1] == PL_multi_open)
6129 s = scan_str(s,FALSE,FALSE);
6132 SvREFCNT_dec(PL_lex_stuff);
6133 PL_lex_stuff = Nullsv;
6135 SvREFCNT_dec(PL_lex_repl);
6136 PL_lex_repl = Nullsv;
6137 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6140 New(803,tbl,256,short);
6141 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6143 complement = del = squash = 0;
6144 while (strchr("cds", *s)) {
6146 complement = OPpTRANS_COMPLEMENT;
6148 del = OPpTRANS_DELETE;
6150 squash = OPpTRANS_SQUASH;
6153 o->op_private = del|squash|complement;
6156 yylval.ival = OP_TRANS;
6161 S_scan_heredoc(pTHX_ register char *s)
6165 I32 op_type = OP_SCALAR;
6172 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6176 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6179 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6180 if (*peek && strchr("`'\"",*peek)) {
6183 s = delimcpy(d, e, s, PL_bufend, term, &len);
6193 if (!isALNUM_lazy_if(s,UTF))
6194 deprecate("bare << to mean <<\"\"");
6195 for (; isALNUM_lazy_if(s,UTF); s++) {
6200 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6201 Perl_croak(aTHX_ "Delimiter for here document is too long");
6204 len = d - PL_tokenbuf;
6205 #ifndef PERL_STRICT_CR
6206 d = strchr(s, '\r');
6210 while (s < PL_bufend) {
6216 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6225 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6230 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6231 herewas = newSVpvn(s,PL_bufend-s);
6233 s--, herewas = newSVpvn(s,d-s);
6234 s += SvCUR(herewas);
6236 tmpstr = NEWSV(87,79);
6237 sv_upgrade(tmpstr, SVt_PVIV);
6242 else if (term == '`') {
6243 op_type = OP_BACKTICK;
6244 SvIVX(tmpstr) = '\\';
6248 PL_multi_start = CopLINE(PL_curcop);
6249 PL_multi_open = PL_multi_close = '<';
6250 term = *PL_tokenbuf;
6251 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6252 char *bufptr = PL_sublex_info.super_bufptr;
6253 char *bufend = PL_sublex_info.super_bufend;
6254 char *olds = s - SvCUR(herewas);
6255 s = strchr(bufptr, '\n');
6259 while (s < bufend &&
6260 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6262 CopLINE_inc(PL_curcop);
6265 CopLINE_set(PL_curcop, PL_multi_start);
6266 missingterm(PL_tokenbuf);
6268 sv_setpvn(herewas,bufptr,d-bufptr+1);
6269 sv_setpvn(tmpstr,d+1,s-d);
6271 sv_catpvn(herewas,s,bufend-s);
6272 (void)strcpy(bufptr,SvPVX(herewas));
6279 while (s < PL_bufend &&
6280 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6282 CopLINE_inc(PL_curcop);
6284 if (s >= PL_bufend) {
6285 CopLINE_set(PL_curcop, PL_multi_start);
6286 missingterm(PL_tokenbuf);
6288 sv_setpvn(tmpstr,d+1,s-d);
6290 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6292 sv_catpvn(herewas,s,PL_bufend-s);
6293 sv_setsv(PL_linestr,herewas);
6294 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6295 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6298 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6299 while (s >= PL_bufend) { /* multiple line string? */
6301 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6302 CopLINE_set(PL_curcop, PL_multi_start);
6303 missingterm(PL_tokenbuf);
6305 CopLINE_inc(PL_curcop);
6306 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6307 #ifndef PERL_STRICT_CR
6308 if (PL_bufend - PL_linestart >= 2) {
6309 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6310 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6312 PL_bufend[-2] = '\n';
6314 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6316 else if (PL_bufend[-1] == '\r')
6317 PL_bufend[-1] = '\n';
6319 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6320 PL_bufend[-1] = '\n';
6322 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6323 SV *sv = NEWSV(88,0);
6325 sv_upgrade(sv, SVt_PVMG);
6326 sv_setsv(sv,PL_linestr);
6327 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6329 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6332 sv_catsv(PL_linestr,herewas);
6333 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6337 sv_catsv(tmpstr,PL_linestr);
6342 PL_multi_end = CopLINE(PL_curcop);
6343 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6344 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6345 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6347 SvREFCNT_dec(herewas);
6348 PL_lex_stuff = tmpstr;
6349 yylval.ival = op_type;
6354 takes: current position in input buffer
6355 returns: new position in input buffer
6356 side-effects: yylval and lex_op are set.
6361 <FH> read from filehandle
6362 <pkg::FH> read from package qualified filehandle
6363 <pkg'FH> read from package qualified filehandle
6364 <$fh> read from filehandle in $fh
6370 S_scan_inputsymbol(pTHX_ char *start)
6372 register char *s = start; /* current position in buffer */
6378 d = PL_tokenbuf; /* start of temp holding space */
6379 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6380 end = strchr(s, '\n');
6383 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6385 /* die if we didn't have space for the contents of the <>,
6386 or if it didn't end, or if we see a newline
6389 if (len >= sizeof PL_tokenbuf)
6390 Perl_croak(aTHX_ "Excessively long <> operator");
6392 Perl_croak(aTHX_ "Unterminated <> operator");
6397 Remember, only scalar variables are interpreted as filehandles by
6398 this code. Anything more complex (e.g., <$fh{$num}>) will be
6399 treated as a glob() call.
6400 This code makes use of the fact that except for the $ at the front,
6401 a scalar variable and a filehandle look the same.
6403 if (*d == '$' && d[1]) d++;
6405 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6406 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6409 /* If we've tried to read what we allow filehandles to look like, and
6410 there's still text left, then it must be a glob() and not a getline.
6411 Use scan_str to pull out the stuff between the <> and treat it
6412 as nothing more than a string.
6415 if (d - PL_tokenbuf != len) {
6416 yylval.ival = OP_GLOB;
6418 s = scan_str(start,FALSE,FALSE);
6420 Perl_croak(aTHX_ "Glob not terminated");
6424 /* we're in a filehandle read situation */
6427 /* turn <> into <ARGV> */
6429 (void)strcpy(d,"ARGV");
6431 /* if <$fh>, create the ops to turn the variable into a
6437 /* try to find it in the pad for this block, otherwise find
6438 add symbol table ops
6440 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6441 OP *o = newOP(OP_PADSV, 0);
6443 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6446 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6447 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6448 newUNOP(OP_RV2SV, 0,
6449 newGVOP(OP_GV, 0, gv)));
6451 PL_lex_op->op_flags |= OPf_SPECIAL;
6452 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6453 yylval.ival = OP_NULL;
6456 /* If it's none of the above, it must be a literal filehandle
6457 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6459 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6460 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6461 yylval.ival = OP_NULL;
6470 takes: start position in buffer
6471 keep_quoted preserve \ on the embedded delimiter(s)
6472 keep_delims preserve the delimiters around the string
6473 returns: position to continue reading from buffer
6474 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6475 updates the read buffer.
6477 This subroutine pulls a string out of the input. It is called for:
6478 q single quotes q(literal text)
6479 ' single quotes 'literal text'
6480 qq double quotes qq(interpolate $here please)
6481 " double quotes "interpolate $here please"
6482 qx backticks qx(/bin/ls -l)
6483 ` backticks `/bin/ls -l`
6484 qw quote words @EXPORT_OK = qw( func() $spam )
6485 m// regexp match m/this/
6486 s/// regexp substitute s/this/that/
6487 tr/// string transliterate tr/this/that/
6488 y/// string transliterate y/this/that/
6489 ($*@) sub prototypes sub foo ($)
6490 (stuff) sub attr parameters sub foo : attr(stuff)
6491 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6493 In most of these cases (all but <>, patterns and transliterate)
6494 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6495 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6496 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6499 It skips whitespace before the string starts, and treats the first
6500 character as the delimiter. If the delimiter is one of ([{< then
6501 the corresponding "close" character )]}> is used as the closing
6502 delimiter. It allows quoting of delimiters, and if the string has
6503 balanced delimiters ([{<>}]) it allows nesting.
6505 The lexer always reads these strings into lex_stuff, except in the
6506 case of the operators which take *two* arguments (s/// and tr///)
6507 when it checks to see if lex_stuff is full (presumably with the 1st
6508 arg to s or tr) and if so puts the string into lex_repl.
6513 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6516 SV *sv; /* scalar value: string */
6517 char *tmps; /* temp string, used for delimiter matching */
6518 register char *s = start; /* current position in the buffer */
6519 register char term; /* terminating character */
6520 register char *to; /* current position in the sv's data */
6521 I32 brackets = 1; /* bracket nesting level */
6522 bool has_utf = FALSE; /* is there any utf8 content? */
6524 /* skip space before the delimiter */
6528 /* mark where we are, in case we need to report errors */
6531 /* after skipping whitespace, the next character is the terminator */
6533 if ((term & 0x80) && UTF)
6536 /* mark where we are */
6537 PL_multi_start = CopLINE(PL_curcop);
6538 PL_multi_open = term;
6540 /* find corresponding closing delimiter */
6541 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6543 PL_multi_close = term;
6545 /* create a new SV to hold the contents. 87 is leak category, I'm
6546 assuming. 79 is the SV's initial length. What a random number. */
6548 sv_upgrade(sv, SVt_PVIV);
6550 (void)SvPOK_only(sv); /* validate pointer */
6552 /* move past delimiter and try to read a complete string */
6554 sv_catpvn(sv, s, 1);
6557 /* extend sv if need be */
6558 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6559 /* set 'to' to the next character in the sv's string */
6560 to = SvPVX(sv)+SvCUR(sv);
6562 /* if open delimiter is the close delimiter read unbridle */
6563 if (PL_multi_open == PL_multi_close) {
6564 for (; s < PL_bufend; s++,to++) {
6565 /* embedded newlines increment the current line number */
6566 if (*s == '\n' && !PL_rsfp)
6567 CopLINE_inc(PL_curcop);
6568 /* handle quoted delimiters */
6569 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6570 if (!keep_quoted && s[1] == term)
6572 /* any other quotes are simply copied straight through */
6576 /* terminate when run out of buffer (the for() condition), or
6577 have found the terminator */
6578 else if (*s == term)
6580 else if (!has_utf && (*s & 0x80) && UTF)
6586 /* if the terminator isn't the same as the start character (e.g.,
6587 matched brackets), we have to allow more in the quoting, and
6588 be prepared for nested brackets.
6591 /* read until we run out of string, or we find the terminator */
6592 for (; s < PL_bufend; s++,to++) {
6593 /* embedded newlines increment the line count */
6594 if (*s == '\n' && !PL_rsfp)
6595 CopLINE_inc(PL_curcop);
6596 /* backslashes can escape the open or closing characters */
6597 if (*s == '\\' && s+1 < PL_bufend) {
6599 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6604 /* allow nested opens and closes */
6605 else if (*s == PL_multi_close && --brackets <= 0)
6607 else if (*s == PL_multi_open)
6609 else if (!has_utf && (*s & 0x80) && UTF)
6614 /* terminate the copied string and update the sv's end-of-string */
6616 SvCUR_set(sv, to - SvPVX(sv));
6619 * this next chunk reads more into the buffer if we're not done yet
6623 break; /* handle case where we are done yet :-) */
6625 #ifndef PERL_STRICT_CR
6626 if (to - SvPVX(sv) >= 2) {
6627 if ((to[-2] == '\r' && to[-1] == '\n') ||
6628 (to[-2] == '\n' && to[-1] == '\r'))
6632 SvCUR_set(sv, to - SvPVX(sv));
6634 else if (to[-1] == '\r')
6637 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6641 /* if we're out of file, or a read fails, bail and reset the current
6642 line marker so we can report where the unterminated string began
6645 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6647 CopLINE_set(PL_curcop, PL_multi_start);
6650 /* we read a line, so increment our line counter */
6651 CopLINE_inc(PL_curcop);
6653 /* update debugger info */
6654 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6655 SV *sv = NEWSV(88,0);
6657 sv_upgrade(sv, SVt_PVMG);
6658 sv_setsv(sv,PL_linestr);
6659 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6662 /* having changed the buffer, we must update PL_bufend */
6663 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6666 /* at this point, we have successfully read the delimited string */
6669 sv_catpvn(sv, s, 1);
6672 PL_multi_end = CopLINE(PL_curcop);
6675 /* if we allocated too much space, give some back */
6676 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6677 SvLEN_set(sv, SvCUR(sv) + 1);
6678 Renew(SvPVX(sv), SvLEN(sv), char);
6681 /* decide whether this is the first or second quoted string we've read
6694 takes: pointer to position in buffer
6695 returns: pointer to new position in buffer
6696 side-effects: builds ops for the constant in yylval.op
6698 Read a number in any of the formats that Perl accepts:
6700 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6701 [\d_]+(\.[\d_]*)?[Ee](\d+)
6703 Underbars (_) are allowed in decimal numbers. If -w is on,
6704 underbars before a decimal point must be at three digit intervals.
6706 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6709 If it reads a number without a decimal point or an exponent, it will
6710 try converting the number to an integer and see if it can do so
6711 without loss of precision.
6715 Perl_scan_num(pTHX_ char *start)
6717 register char *s = start; /* current position in buffer */
6718 register char *d; /* destination in temp buffer */
6719 register char *e; /* end of temp buffer */
6720 NV nv; /* number read, as a double */
6721 SV *sv = Nullsv; /* place to put the converted number */
6722 bool floatit; /* boolean: int or float? */
6723 char *lastub = 0; /* position of last underbar */
6724 static char number_too_long[] = "Number too long";
6726 /* We use the first character to decide what type of number this is */
6730 Perl_croak(aTHX_ "panic: scan_num");
6732 /* if it starts with a 0, it could be an octal number, a decimal in
6733 0.13 disguise, or a hexadecimal number, or a binary number. */
6737 u holds the "number so far"
6738 shift the power of 2 of the base
6739 (hex == 4, octal == 3, binary == 1)
6740 overflowed was the number more than we can hold?
6742 Shift is used when we add a digit. It also serves as an "are
6743 we in octal/hex/binary?" indicator to disallow hex characters
6750 bool overflowed = FALSE;
6751 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6752 static char* bases[5] = { "", "binary", "", "octal",
6754 static char* Bases[5] = { "", "Binary", "", "Octal",
6756 static char *maxima[5] = { "",
6757 "0b11111111111111111111111111111111",
6761 char *base, *Base, *max;
6767 } else if (s[1] == 'b') {
6771 /* check for a decimal in disguise */
6772 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6774 /* so it must be octal */
6778 base = bases[shift];
6779 Base = Bases[shift];
6780 max = maxima[shift];
6782 /* read the rest of the number */
6784 /* x is used in the overflow test,
6785 b is the digit we're adding on. */
6790 /* if we don't mention it, we're done */
6799 /* 8 and 9 are not octal */
6802 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6806 case '2': case '3': case '4':
6807 case '5': case '6': case '7':
6809 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6813 b = *s++ & 15; /* ASCII digit -> value of digit */
6817 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6818 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6819 /* make sure they said 0x */
6824 /* Prepare to put the digit we have onto the end
6825 of the number so far. We check for overflows.
6830 x = u << shift; /* make room for the digit */
6832 if ((x >> shift) != u
6833 && !(PL_hints & HINT_NEW_BINARY)) {
6837 if (ckWARN_d(WARN_OVERFLOW))
6838 Perl_warner(aTHX_ WARN_OVERFLOW,
6839 "Integer overflow in %s number",
6842 u = x | b; /* add the digit to the end */
6845 n *= nvshift[shift];
6846 /* If an NV has not enough bits in its
6847 * mantissa to represent an UV this summing of
6848 * small low-order numbers is a waste of time
6849 * (because the NV cannot preserve the
6850 * low-order bits anyway): we could just
6851 * remember when did we overflow and in the
6852 * end just multiply n by the right
6860 /* if we get here, we had success: make a scalar value from
6867 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
6868 Perl_warner(aTHX_ WARN_PORTABLE,
6869 "%s number > %s non-portable",
6876 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
6877 Perl_warner(aTHX_ WARN_PORTABLE,
6878 "%s number > %s non-portable",
6883 if (PL_hints & HINT_NEW_BINARY)
6884 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
6889 handle decimal numbers.
6890 we're also sent here when we read a 0 as the first digit
6892 case '1': case '2': case '3': case '4': case '5':
6893 case '6': case '7': case '8': case '9': case '.':
6896 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
6899 /* read next group of digits and _ and copy into d */
6900 while (isDIGIT(*s) || *s == '_') {
6901 /* skip underscores, checking for misplaced ones
6905 dTHR; /* only for ckWARN */
6906 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
6907 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6911 /* check for end of fixed-length buffer */
6913 Perl_croak(aTHX_ number_too_long);
6914 /* if we're ok, copy the character */
6919 /* final misplaced underbar check */
6920 if (lastub && s - lastub != 3) {
6922 if (ckWARN(WARN_SYNTAX))
6923 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6926 /* read a decimal portion if there is one. avoid
6927 3..5 being interpreted as the number 3. followed
6930 if (*s == '.' && s[1] != '.') {
6934 /* copy, ignoring underbars, until we run out of
6935 digits. Note: no misplaced underbar checks!
6937 for (; isDIGIT(*s) || *s == '_'; s++) {
6938 /* fixed length buffer check */
6940 Perl_croak(aTHX_ number_too_long);
6944 if (*s == '.' && isDIGIT(s[1])) {
6945 /* oops, it's really a v-string, but without the "v" */
6951 /* read exponent part, if present */
6952 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
6956 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
6957 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
6959 /* allow positive or negative exponent */
6960 if (*s == '+' || *s == '-')
6963 /* read digits of exponent (no underbars :-) */
6964 while (isDIGIT(*s)) {
6966 Perl_croak(aTHX_ number_too_long);
6971 /* terminate the string */
6974 /* make an sv from the string */
6977 #if defined(Strtol) && defined(Strtoul)
6980 strtol/strtoll sets errno to ERANGE if the number is too big
6981 for an integer. We try to do an integer conversion first
6982 if no characters indicating "float" have been found.
6989 if (*PL_tokenbuf == '-')
6990 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
6992 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
6994 floatit = TRUE; /* Probably just too large. */
6995 else if (*PL_tokenbuf == '-')
6997 else if (uv <= IV_MAX)
6998 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7003 nv = Atof(PL_tokenbuf);
7008 No working strtou?ll?.
7010 Unfortunately atol() doesn't do range checks (returning
7011 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7012 everywhere [1], so we cannot use use atol() (or atoll()).
7013 If we could, they would be used, as Atol(), very much like
7014 Strtol() and Strtoul() are used above.
7016 [1] XXX Configure test needed to check for atol()
7017 (and atoll()) overflow behaviour XXX
7021 We need to do this the hard way. */
7023 nv = Atof(PL_tokenbuf);
7025 /* See if we can make do with an integer value without loss of
7026 precision. We use U_V to cast to a UV, because some
7027 compilers have issues. Then we try casting it back and see
7028 if it was the same [1]. We only do this if we know we
7029 specifically read an integer. If floatit is true, then we
7030 don't need to do the conversion at all.
7032 [1] Note that this is lossy if our NVs cannot preserve our
7033 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7034 and NV_PRESERVES_UV_BITS (a number), but in general we really
7035 do hope all such potentially lossy platforms have strtou?ll?
7036 to do a lossless IV/UV conversion.
7038 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7039 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7040 as NV_DIG and NV_MANT_DIG)?
7046 if (!floatit && (NV)uv == nv) {
7048 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7056 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7057 (PL_hints & HINT_NEW_INTEGER) )
7058 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7059 (floatit ? "float" : "integer"),
7063 /* if it starts with a v, it could be a v-string */
7069 while (isDIGIT(*pos) || *pos == '_')
7071 if (!isALPHA(*pos)) {
7073 U8 tmpbuf[UTF8_MAXLEN];
7076 s++; /* get past 'v' */
7079 sv_setpvn(sv, "", 0);
7082 if (*s == '0' && isDIGIT(s[1]))
7083 yyerror("Octal number in vector unsupported");
7086 /* this is atoi() that tolerates underscores */
7089 while (--end >= s) {
7094 rev += (*end - '0') * mult;
7096 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7097 Perl_warner(aTHX_ WARN_OVERFLOW,
7098 "Integer overflow in decimal number");
7101 tmpend = uv_to_utf8(tmpbuf, rev);
7102 utf8 = utf8 || rev > 127;
7103 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7104 if (*pos == '.' && isDIGIT(pos[1]))
7110 while (isDIGIT(*pos) || *pos == '_')
7118 sv_utf8_downgrade(sv, TRUE);
7125 /* make the op for the constant and return */
7128 yylval.opval = newSVOP(OP_CONST, 0, sv);
7130 yylval.opval = Nullop;
7136 S_scan_formline(pTHX_ register char *s)
7141 SV *stuff = newSVpvn("",0);
7142 bool needargs = FALSE;
7145 if (*s == '.' || *s == /*{*/'}') {
7147 #ifdef PERL_STRICT_CR
7148 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7150 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7152 if (*t == '\n' || t == PL_bufend)
7155 if (PL_in_eval && !PL_rsfp) {
7156 eol = strchr(s,'\n');
7161 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7163 for (t = s; t < eol; t++) {
7164 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7166 goto enough; /* ~~ must be first line in formline */
7168 if (*t == '@' || *t == '^')
7171 sv_catpvn(stuff, s, eol-s);
7172 #ifndef PERL_STRICT_CR
7173 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7174 char *end = SvPVX(stuff) + SvCUR(stuff);
7183 s = filter_gets(PL_linestr, PL_rsfp, 0);
7184 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7185 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7188 yyerror("Format not terminated");
7198 PL_lex_state = LEX_NORMAL;
7199 PL_nextval[PL_nexttoke].ival = 0;
7203 PL_lex_state = LEX_FORMLINE;
7204 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7206 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7210 SvREFCNT_dec(stuff);
7211 PL_lex_formbrack = 0;
7222 PL_cshlen = strlen(PL_cshname);
7227 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7230 I32 oldsavestack_ix = PL_savestack_ix;
7231 CV* outsidecv = PL_compcv;
7235 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7237 SAVEI32(PL_subline);
7238 save_item(PL_subname);
7241 SAVESPTR(PL_comppad_name);
7242 SAVESPTR(PL_compcv);
7243 SAVEI32(PL_comppad_name_fill);
7244 SAVEI32(PL_min_intro_pending);
7245 SAVEI32(PL_max_intro_pending);
7246 SAVEI32(PL_pad_reset_pending);
7248 PL_compcv = (CV*)NEWSV(1104,0);
7249 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7250 CvFLAGS(PL_compcv) |= flags;
7252 PL_comppad = newAV();
7253 av_push(PL_comppad, Nullsv);
7254 PL_curpad = AvARRAY(PL_comppad);
7255 PL_comppad_name = newAV();
7256 PL_comppad_name_fill = 0;
7257 PL_min_intro_pending = 0;
7259 PL_subline = CopLINE(PL_curcop);
7261 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7262 PL_curpad[0] = (SV*)newAV();
7263 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7264 #endif /* USE_THREADS */
7266 comppadlist = newAV();
7267 AvREAL_off(comppadlist);
7268 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7269 av_store(comppadlist, 1, (SV*)PL_comppad);
7271 CvPADLIST(PL_compcv) = comppadlist;
7272 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7274 CvOWNER(PL_compcv) = 0;
7275 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7276 MUTEX_INIT(CvMUTEXP(PL_compcv));
7277 #endif /* USE_THREADS */
7279 return oldsavestack_ix;
7283 Perl_yywarn(pTHX_ char *s)
7286 PL_in_eval |= EVAL_WARNONLY;
7288 PL_in_eval &= ~EVAL_WARNONLY;
7293 Perl_yyerror(pTHX_ char *s)
7297 char *context = NULL;
7301 if (!yychar || (yychar == ';' && !PL_rsfp))
7303 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7304 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7305 while (isSPACE(*PL_oldoldbufptr))
7307 context = PL_oldoldbufptr;
7308 contlen = PL_bufptr - PL_oldoldbufptr;
7310 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7311 PL_oldbufptr != PL_bufptr) {
7312 while (isSPACE(*PL_oldbufptr))
7314 context = PL_oldbufptr;
7315 contlen = PL_bufptr - PL_oldbufptr;
7317 else if (yychar > 255)
7318 where = "next token ???";
7319 #ifdef USE_PURE_BISON
7320 /* GNU Bison sets the value -2 */
7321 else if (yychar == -2) {
7323 else if ((yychar & 127) == 127) {
7325 if (PL_lex_state == LEX_NORMAL ||
7326 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7327 where = "at end of line";
7328 else if (PL_lex_inpat)
7329 where = "within pattern";
7331 where = "within string";
7334 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7336 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7337 else if (isPRINT_LC(yychar))
7338 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7340 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7341 where = SvPVX(where_sv);
7343 msg = sv_2mortal(newSVpv(s, 0));
7344 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7345 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7347 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7349 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7350 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7351 Perl_sv_catpvf(aTHX_ msg,
7352 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7353 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7356 if (PL_in_eval & EVAL_WARNONLY)
7357 Perl_warn(aTHX_ "%"SVf, msg);
7360 if (PL_error_count >= 10) {
7361 if (PL_in_eval && SvCUR(ERRSV))
7362 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
7363 ERRSV, CopFILE(PL_curcop));
7365 Perl_croak(aTHX_ "%s has too many errors.\n",
7366 CopFILE(PL_curcop));
7369 PL_in_my_stash = Nullhv;
7374 S_swallow_bom(pTHX_ U8 *s)
7377 slen = SvCUR(PL_linestr);
7381 /* UTF-16 little-endian */
7382 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7383 Perl_croak(aTHX_ "Unsupported script encoding");
7384 #ifndef PERL_NO_UTF16_FILTER
7385 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7387 if (PL_bufend > (char*)s) {
7391 filter_add(utf16rev_textfilter, NULL);
7392 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7393 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7394 PL_bufend - (char*)s - 1,
7396 Copy(news, s, newlen, U8);
7397 SvCUR_set(PL_linestr, newlen);
7398 PL_bufend = SvPVX(PL_linestr) + newlen;
7399 news[newlen++] = '\0';
7403 Perl_croak(aTHX_ "Unsupported script encoding");
7408 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7409 #ifndef PERL_NO_UTF16_FILTER
7410 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7412 if (PL_bufend > (char *)s) {
7416 filter_add(utf16_textfilter, NULL);
7417 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7418 PL_bufend = (char*)utf16_to_utf8(s, news,
7419 PL_bufend - (char*)s,
7421 Copy(news, s, newlen, U8);
7422 SvCUR_set(PL_linestr, newlen);
7423 PL_bufend = SvPVX(PL_linestr) + newlen;
7424 news[newlen++] = '\0';
7428 Perl_croak(aTHX_ "Unsupported script encoding");
7433 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7434 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7439 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7440 s[2] == 0xFE && s[3] == 0xFF)
7442 Perl_croak(aTHX_ "Unsupported script encoding");
7454 * Restore a source filter.
7458 restore_rsfp(pTHXo_ void *f)
7460 PerlIO *fp = (PerlIO*)f;
7462 if (PL_rsfp == PerlIO_stdin())
7463 PerlIO_clearerr(PL_rsfp);
7464 else if (PL_rsfp && (PL_rsfp != fp))
7465 PerlIO_close(PL_rsfp);
7469 #ifndef PERL_NO_UTF16_FILTER
7471 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7473 I32 count = FILTER_READ(idx+1, sv, maxlen);
7478 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7479 if (!*SvPV_nolen(sv))
7480 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7483 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7484 sv_usepvn(sv, (char*)tmps, tend - tmps);
7490 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7492 I32 count = FILTER_READ(idx+1, sv, maxlen);
7497 if (!*SvPV_nolen(sv))
7498 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7501 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7502 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7503 sv_usepvn(sv, (char*)tmps, tend - tmps);