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);
216 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
218 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
219 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
221 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
222 if (t < PL_bufptr && isSPACE(*t))
223 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
224 t - PL_oldoldbufptr, PL_oldoldbufptr);
227 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);
362 SAVECOPLINE(PL_curcop);
365 SAVEPPTR(PL_oldbufptr);
366 SAVEPPTR(PL_oldoldbufptr);
367 SAVEPPTR(PL_linestart);
368 SAVESPTR(PL_linestr);
369 SAVEPPTR(PL_lex_brackstack);
370 SAVEPPTR(PL_lex_casestack);
371 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
372 SAVESPTR(PL_lex_stuff);
373 SAVEI32(PL_lex_defer);
374 SAVEI32(PL_sublex_info.sub_inwhat);
375 SAVESPTR(PL_lex_repl);
377 SAVEINT(PL_lex_expect);
379 PL_lex_state = LEX_NORMAL;
383 New(899, PL_lex_brackstack, 120, char);
384 New(899, PL_lex_casestack, 12, char);
385 SAVEFREEPV(PL_lex_brackstack);
386 SAVEFREEPV(PL_lex_casestack);
388 *PL_lex_casestack = '\0';
391 PL_lex_stuff = Nullsv;
392 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((U8*)start, &skip);
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",
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 (@foo, @:foo, @'foo, @{foo}, @$foo) */
1309 else if (*s == '@' && s[1]
1310 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$", s[1])))
1313 /* check for embedded scalars. only stop if we're sure it's a
1316 else if (*s == '$') {
1317 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1319 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1320 break; /* in regexp, $ might be tail anchor */
1323 /* (now in tr/// code again) */
1325 if (*s & 0x80 && thisutf) {
1326 (void)utf8_to_uv((U8*)s, &len);
1328 /* illegal UTF8, make it valid */
1329 char *old_pvx = SvPVX(sv);
1330 /* need space for one extra char (NOTE: SvCUR() not set here) */
1331 d = SvGROW(sv, SvLEN(sv) + 1) + (d - old_pvx);
1332 d = (char*)uv_to_utf8((U8*)d, (U8)*s++);
1343 if (*s == '\\' && s+1 < send) {
1346 /* some backslashes we leave behind */
1347 if (*leaveit && *s && strchr(leaveit, *s)) {
1353 /* deprecate \1 in strings and substitution replacements */
1354 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1355 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1357 dTHR; /* only for ckWARN */
1358 if (ckWARN(WARN_SYNTAX))
1359 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1364 /* string-change backslash escapes */
1365 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1370 /* if we get here, it's either a quoted -, or a digit */
1373 /* quoted - in transliterations */
1375 if (PL_lex_inwhat == OP_TRANS) {
1383 if (ckWARN(WARN_MISC) && isALNUM(*s))
1384 Perl_warner(aTHX_ WARN_MISC,
1385 "Unrecognized escape \\%c passed through",
1387 /* default action is to copy the quoted character */
1392 /* \132 indicates an octal constant */
1393 case '0': case '1': case '2': case '3':
1394 case '4': case '5': case '6': case '7':
1395 len = 0; /* disallow underscores */
1396 uv = (UV)scan_oct(s, 3, &len);
1398 goto NUM_ESCAPE_INSERT;
1400 /* \x24 indicates a hex constant */
1404 char* e = strchr(s, '}');
1406 yyerror("Missing right brace on \\x{}");
1409 len = 1; /* allow underscores */
1410 uv = (UV)scan_hex(s + 1, e - s - 1, &len);
1414 len = 0; /* disallow underscores */
1415 uv = (UV)scan_hex(s, 2, &len);
1420 /* Insert oct or hex escaped character.
1421 * There will always enough room in sv since such escapes will
1422 * be longer than any utf8 sequence they can end up as
1425 if (!thisutf && !has_utf && uv > 255) {
1426 /* might need to recode whatever we have accumulated so far
1427 * if it contains any hibit chars
1431 for (c = SvPVX(sv); c < d; c++) {
1436 char *old_pvx = SvPVX(sv);
1438 d = SvGROW(sv, SvCUR(sv) + hicount + 1) + (d - old_pvx);
1447 uv_to_utf8((U8*)dst, (U8)*src--);
1457 if (thisutf || uv > 255) {
1458 d = (char*)uv_to_utf8((U8*)d, uv);
1470 /* \N{latin small letter a} is a named character */
1474 char* e = strchr(s, '}');
1480 yyerror("Missing right brace on \\N{}");
1484 res = newSVpvn(s + 1, e - s - 1);
1485 res = new_constant( Nullch, 0, "charnames",
1486 res, Nullsv, "\\N{...}" );
1487 str = SvPV(res,len);
1488 if (!has_utf && SvUTF8(res)) {
1489 char *ostart = SvPVX(sv);
1490 SvCUR_set(sv, d - ostart);
1492 sv_utf8_upgrade(sv);
1493 d = SvPVX(sv) + SvCUR(sv);
1496 if (len > e - s + 4) {
1497 char *odest = SvPVX(sv);
1499 SvGROW(sv, (SvCUR(sv) + len - (e - s + 4)));
1500 d = SvPVX(sv) + (d - odest);
1502 Copy(str, d, len, char);
1509 yyerror("Missing braces on \\N{}");
1512 /* \c is a control character */
1527 /* printf-style backslashes, formfeeds, newlines, etc */
1545 *d++ = '\047'; /* CP 1047 */
1548 *d++ = '\057'; /* CP 1047 */
1562 } /* end if (backslash) */
1565 } /* while loop to process each character */
1567 /* terminate the string and set up the sv */
1569 SvCUR_set(sv, d - SvPVX(sv));
1574 /* shrink the sv if we allocated more than we used */
1575 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1576 SvLEN_set(sv, SvCUR(sv) + 1);
1577 Renew(SvPVX(sv), SvLEN(sv), char);
1580 /* return the substring (via yylval) only if we parsed anything */
1581 if (s > PL_bufptr) {
1582 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1583 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1585 ( PL_lex_inwhat == OP_TRANS
1587 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1590 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1597 * Returns TRUE if there's more to the expression (e.g., a subscript),
1600 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1602 * ->[ and ->{ return TRUE
1603 * { and [ outside a pattern are always subscripts, so return TRUE
1604 * if we're outside a pattern and it's not { or [, then return FALSE
1605 * if we're in a pattern and the first char is a {
1606 * {4,5} (any digits around the comma) returns FALSE
1607 * if we're in a pattern and the first char is a [
1609 * [SOMETHING] has a funky algorithm to decide whether it's a
1610 * character class or not. It has to deal with things like
1611 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1612 * anything else returns TRUE
1615 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1618 S_intuit_more(pTHX_ register char *s)
1620 if (PL_lex_brackets)
1622 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1624 if (*s != '{' && *s != '[')
1629 /* In a pattern, so maybe we have {n,m}. */
1646 /* On the other hand, maybe we have a character class */
1649 if (*s == ']' || *s == '^')
1652 /* this is terrifying, and it works */
1653 int weight = 2; /* let's weigh the evidence */
1655 unsigned char un_char = 255, last_un_char;
1656 char *send = strchr(s,']');
1657 char tmpbuf[sizeof PL_tokenbuf * 4];
1659 if (!send) /* has to be an expression */
1662 Zero(seen,256,char);
1665 else if (isDIGIT(*s)) {
1667 if (isDIGIT(s[1]) && s[2] == ']')
1673 for (; s < send; s++) {
1674 last_un_char = un_char;
1675 un_char = (unsigned char)*s;
1680 weight -= seen[un_char] * 10;
1681 if (isALNUM_lazy_if(s+1,UTF)) {
1682 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1683 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1688 else if (*s == '$' && s[1] &&
1689 strchr("[#!%*<>()-=",s[1])) {
1690 if (/*{*/ strchr("])} =",s[2]))
1699 if (strchr("wds]",s[1]))
1701 else if (seen['\''] || seen['"'])
1703 else if (strchr("rnftbxcav",s[1]))
1705 else if (isDIGIT(s[1])) {
1707 while (s[1] && isDIGIT(s[1]))
1717 if (strchr("aA01! ",last_un_char))
1719 if (strchr("zZ79~",s[1]))
1721 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1722 weight -= 5; /* cope with negative subscript */
1725 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1726 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1731 if (keyword(tmpbuf, d - tmpbuf))
1734 if (un_char == last_un_char + 1)
1736 weight -= seen[un_char];
1741 if (weight >= 0) /* probably a character class */
1751 * Does all the checking to disambiguate
1753 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1754 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1756 * First argument is the stuff after the first token, e.g. "bar".
1758 * Not a method if bar is a filehandle.
1759 * Not a method if foo is a subroutine prototyped to take a filehandle.
1760 * Not a method if it's really "Foo $bar"
1761 * Method if it's "foo $bar"
1762 * Not a method if it's really "print foo $bar"
1763 * Method if it's really "foo package::" (interpreted as package->foo)
1764 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
1765 * Not a method if bar is a filehandle or package, but is quoted with
1770 S_intuit_method(pTHX_ char *start, GV *gv)
1772 char *s = start + (*start == '$');
1773 char tmpbuf[sizeof PL_tokenbuf];
1781 if ((cv = GvCVu(gv))) {
1782 char *proto = SvPVX(cv);
1792 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1793 /* start is the beginning of the possible filehandle/object,
1794 * and s is the end of it
1795 * tmpbuf is a copy of it
1798 if (*start == '$') {
1799 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1804 return *s == '(' ? FUNCMETH : METHOD;
1806 if (!keyword(tmpbuf, len)) {
1807 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1812 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1813 if (indirgv && GvCVu(indirgv))
1815 /* filehandle or package name makes it a method */
1816 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1818 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1819 return 0; /* no assumptions -- "=>" quotes bearword */
1821 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1822 newSVpvn(tmpbuf,len));
1823 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1827 return *s == '(' ? FUNCMETH : METHOD;
1835 * Return a string of Perl code to load the debugger. If PERL5DB
1836 * is set, it will return the contents of that, otherwise a
1837 * compile-time require of perl5db.pl.
1844 char *pdb = PerlEnv_getenv("PERL5DB");
1848 SETERRNO(0,SS$_NORMAL);
1849 return "BEGIN { require 'perl5db.pl' }";
1855 /* Encoded script support. filter_add() effectively inserts a
1856 * 'pre-processing' function into the current source input stream.
1857 * Note that the filter function only applies to the current source file
1858 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1860 * The datasv parameter (which may be NULL) can be used to pass
1861 * private data to this instance of the filter. The filter function
1862 * can recover the SV using the FILTER_DATA macro and use it to
1863 * store private buffers and state information.
1865 * The supplied datasv parameter is upgraded to a PVIO type
1866 * and the IoDIRP/IoANY field is used to store the function pointer,
1867 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
1868 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1869 * private use must be set using malloc'd pointers.
1873 Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
1878 if (!PL_rsfp_filters)
1879 PL_rsfp_filters = newAV();
1881 datasv = NEWSV(255,0);
1882 if (!SvUPGRADE(datasv, SVt_PVIO))
1883 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
1884 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
1885 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
1886 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1887 funcp, SvPV_nolen(datasv)));
1888 av_unshift(PL_rsfp_filters, 1);
1889 av_store(PL_rsfp_filters, 0, datasv) ;
1894 /* Delete most recently added instance of this filter function. */
1896 Perl_filter_del(pTHX_ filter_t funcp)
1899 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
1900 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1902 /* if filter is on top of stack (usual case) just pop it off */
1903 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
1904 if (IoANY(datasv) == (void *)funcp) {
1905 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
1906 IoANY(datasv) = (void *)NULL;
1907 sv_free(av_pop(PL_rsfp_filters));
1911 /* we need to search for the correct entry and clear it */
1912 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
1916 /* Invoke the n'th filter function for the current rsfp. */
1918 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
1921 /* 0 = read one text line */
1926 if (!PL_rsfp_filters)
1928 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1929 /* Provide a default input filter to make life easy. */
1930 /* Note that we append to the line. This is handy. */
1931 DEBUG_P(PerlIO_printf(Perl_debug_log,
1932 "filter_read %d: from rsfp\n", idx));
1936 int old_len = SvCUR(buf_sv) ;
1938 /* ensure buf_sv is large enough */
1939 SvGROW(buf_sv, old_len + maxlen) ;
1940 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1941 if (PerlIO_error(PL_rsfp))
1942 return -1; /* error */
1944 return 0 ; /* end of file */
1946 SvCUR_set(buf_sv, old_len + len) ;
1949 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
1950 if (PerlIO_error(PL_rsfp))
1951 return -1; /* error */
1953 return 0 ; /* end of file */
1956 return SvCUR(buf_sv);
1958 /* Skip this filter slot if filter has been deleted */
1959 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
1960 DEBUG_P(PerlIO_printf(Perl_debug_log,
1961 "filter_read %d: skipped (filter deleted)\n",
1963 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1965 /* Get function pointer hidden within datasv */
1966 funcp = (filter_t)IoANY(datasv);
1967 DEBUG_P(PerlIO_printf(Perl_debug_log,
1968 "filter_read %d: via function %p (%s)\n",
1969 idx, funcp, SvPV_nolen(datasv)));
1970 /* Call function. The function is expected to */
1971 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1972 /* Return: <0:error, =0:eof, >0:not eof */
1973 return (*funcp)(aTHXo_ idx, buf_sv, maxlen);
1977 S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
1979 #ifdef PERL_CR_FILTER
1980 if (!PL_rsfp_filters) {
1981 filter_add(S_cr_textfilter,NULL);
1984 if (PL_rsfp_filters) {
1987 SvCUR_set(sv, 0); /* start with empty line */
1988 if (FILTER_READ(0, sv, 0) > 0)
1989 return ( SvPVX(sv) ) ;
1994 return (sv_gets(sv, fp, append));
1998 S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
2002 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
2006 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
2007 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2009 return GvHV(gv); /* Foo:: */
2012 /* use constant CLASS => 'MyClass' */
2013 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2015 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2016 pkgname = SvPV_nolen(sv);
2020 return gv_stashpv(pkgname, FALSE);
2024 static char* exp_name[] =
2025 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2026 "ATTRTERM", "TERMBLOCK"
2033 Works out what to call the token just pulled out of the input
2034 stream. The yacc parser takes care of taking the ops we return and
2035 stitching them into a tree.
2041 if read an identifier
2042 if we're in a my declaration
2043 croak if they tried to say my($foo::bar)
2044 build the ops for a my() declaration
2045 if it's an access to a my() variable
2046 are we in a sort block?
2047 croak if my($a); $a <=> $b
2048 build ops for access to a my() variable
2049 if in a dq string, and they've said @foo and we can't find @foo
2051 build ops for a bareword
2052 if we already built the token before, use it.
2056 #pragma segment Perl_yylex
2059 #ifdef USE_PURE_BISON
2060 Perl_yylex(pTHX_ YYSTYPE *lvalp, int *lcharp)
2073 #ifdef USE_PURE_BISON
2074 yylval_pointer = lvalp;
2075 yychar_pointer = lcharp;
2078 /* check if there's an identifier for us to look at */
2079 if (PL_pending_ident) {
2080 /* pit holds the identifier we read and pending_ident is reset */
2081 char pit = PL_pending_ident;
2082 PL_pending_ident = 0;
2084 /* if we're in a my(), we can't allow dynamics here.
2085 $foo'bar has already been turned into $foo::bar, so
2086 just check for colons.
2088 if it's a legal name, the OP is a PADANY.
2091 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
2092 if (strchr(PL_tokenbuf,':'))
2093 yyerror(Perl_form(aTHX_ "No package name allowed for "
2094 "variable %s in \"our\"",
2096 tmp = pad_allocmy(PL_tokenbuf);
2099 if (strchr(PL_tokenbuf,':'))
2100 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
2102 yylval.opval = newOP(OP_PADANY, 0);
2103 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
2109 build the ops for accesses to a my() variable.
2111 Deny my($a) or my($b) in a sort block, *if* $a or $b is
2112 then used in a comparison. This catches most, but not
2113 all cases. For instance, it catches
2114 sort { my($a); $a <=> $b }
2116 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
2117 (although why you'd do that is anyone's guess).
2120 if (!strchr(PL_tokenbuf,':')) {
2122 /* Check for single character per-thread SVs */
2123 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
2124 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
2125 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
2127 yylval.opval = newOP(OP_THREADSV, 0);
2128 yylval.opval->op_targ = tmp;
2131 #endif /* USE_THREADS */
2132 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
2133 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
2134 /* might be an "our" variable" */
2135 if (SvFLAGS(namesv) & SVpad_OUR) {
2136 /* build ops for a bareword */
2137 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
2138 sv_catpvn(sym, "::", 2);
2139 sv_catpv(sym, PL_tokenbuf+1);
2140 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
2141 yylval.opval->op_private = OPpCONST_ENTERED;
2142 gv_fetchpv(SvPVX(sym),
2144 ? (GV_ADDMULTI | GV_ADDINEVAL)
2147 ((PL_tokenbuf[0] == '$') ? SVt_PV
2148 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2153 /* if it's a sort block and they're naming $a or $b */
2154 if (PL_last_lop_op == OP_SORT &&
2155 PL_tokenbuf[0] == '$' &&
2156 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
2159 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
2160 d < PL_bufend && *d != '\n';
2163 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
2164 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
2170 yylval.opval = newOP(OP_PADANY, 0);
2171 yylval.opval->op_targ = tmp;
2177 Whine if they've said @foo in a doublequoted string,
2178 and @foo isn't a variable we can find in the symbol
2181 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
2182 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
2183 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
2184 && ckWARN(WARN_AMBIGUOUS))
2186 /* Downgraded from fatal to warning 20000522 mjd */
2187 Perl_warner(aTHX_ WARN_AMBIGUOUS,
2188 "Possible unintended interpolation of %s in string",
2193 /* build ops for a bareword */
2194 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
2195 yylval.opval->op_private = OPpCONST_ENTERED;
2196 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
2197 ((PL_tokenbuf[0] == '$') ? SVt_PV
2198 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
2203 /* no identifier pending identification */
2205 switch (PL_lex_state) {
2207 case LEX_NORMAL: /* Some compilers will produce faster */
2208 case LEX_INTERPNORMAL: /* code if we comment these out. */
2212 /* when we've already built the next token, just pull it out of the queue */
2215 yylval = PL_nextval[PL_nexttoke];
2217 PL_lex_state = PL_lex_defer;
2218 PL_expect = PL_lex_expect;
2219 PL_lex_defer = LEX_NORMAL;
2221 return(PL_nexttype[PL_nexttoke]);
2223 /* interpolated case modifiers like \L \U, including \Q and \E.
2224 when we get here, PL_bufptr is at the \
2226 case LEX_INTERPCASEMOD:
2228 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
2229 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
2231 /* handle \E or end of string */
2232 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
2236 if (PL_lex_casemods) {
2237 oldmod = PL_lex_casestack[--PL_lex_casemods];
2238 PL_lex_casestack[PL_lex_casemods] = '\0';
2240 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2242 PL_lex_state = LEX_INTERPCONCAT;
2246 if (PL_bufptr != PL_bufend)
2248 PL_lex_state = LEX_INTERPCONCAT;
2253 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2254 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
2255 if (strchr("LU", *s) &&
2256 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
2258 PL_lex_casestack[--PL_lex_casemods] = '\0';
2261 if (PL_lex_casemods > 10) {
2262 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2263 if (newlb != PL_lex_casestack) {
2265 PL_lex_casestack = newlb;
2268 PL_lex_casestack[PL_lex_casemods++] = *s;
2269 PL_lex_casestack[PL_lex_casemods] = '\0';
2270 PL_lex_state = LEX_INTERPCONCAT;
2271 PL_nextval[PL_nexttoke].ival = 0;
2274 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
2276 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
2278 PL_nextval[PL_nexttoke].ival = OP_LC;
2280 PL_nextval[PL_nexttoke].ival = OP_UC;
2282 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
2284 Perl_croak(aTHX_ "panic: yylex");
2287 if (PL_lex_starts) {
2296 case LEX_INTERPPUSH:
2297 return sublex_push();
2299 case LEX_INTERPSTART:
2300 if (PL_bufptr == PL_bufend)
2301 return sublex_done();
2303 PL_lex_dojoin = (*PL_bufptr == '@');
2304 PL_lex_state = LEX_INTERPNORMAL;
2305 if (PL_lex_dojoin) {
2306 PL_nextval[PL_nexttoke].ival = 0;
2309 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2310 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
2311 force_next(PRIVATEREF);
2313 force_ident("\"", '$');
2314 #endif /* USE_THREADS */
2315 PL_nextval[PL_nexttoke].ival = 0;
2317 PL_nextval[PL_nexttoke].ival = 0;
2319 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
2322 if (PL_lex_starts++) {
2328 case LEX_INTERPENDMAYBE:
2329 if (intuit_more(PL_bufptr)) {
2330 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
2336 if (PL_lex_dojoin) {
2337 PL_lex_dojoin = FALSE;
2338 PL_lex_state = LEX_INTERPCONCAT;
2341 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
2342 && SvEVALED(PL_lex_repl))
2344 if (PL_bufptr != PL_bufend)
2345 Perl_croak(aTHX_ "Bad evalled substitution pattern");
2346 PL_lex_repl = Nullsv;
2349 case LEX_INTERPCONCAT:
2351 if (PL_lex_brackets)
2352 Perl_croak(aTHX_ "panic: INTERPCONCAT");
2354 if (PL_bufptr == PL_bufend)
2355 return sublex_done();
2357 if (SvIVX(PL_linestr) == '\'') {
2358 SV *sv = newSVsv(PL_linestr);
2361 else if ( PL_hints & HINT_NEW_RE )
2362 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
2363 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2367 s = scan_const(PL_bufptr);
2369 PL_lex_state = LEX_INTERPCASEMOD;
2371 PL_lex_state = LEX_INTERPSTART;
2374 if (s != PL_bufptr) {
2375 PL_nextval[PL_nexttoke] = yylval;
2378 if (PL_lex_starts++)
2388 PL_lex_state = LEX_NORMAL;
2389 s = scan_formline(PL_bufptr);
2390 if (!PL_lex_formbrack)
2396 PL_oldoldbufptr = PL_oldbufptr;
2399 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2400 exp_name[PL_expect], s);
2406 if (isIDFIRST_lazy_if(s,UTF))
2408 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
2411 goto fake_eof; /* emulate EOF on ^D or ^Z */
2416 if (PL_lex_brackets)
2417 yyerror("Missing right curly or square bracket");
2420 if (s++ < PL_bufend)
2421 goto retry; /* ignore stray nulls */
2424 if (!PL_in_eval && !PL_preambled) {
2425 PL_preambled = TRUE;
2426 sv_setpv(PL_linestr,incl_perldb());
2427 if (SvCUR(PL_linestr))
2428 sv_catpv(PL_linestr,";");
2430 while(AvFILLp(PL_preambleav) >= 0) {
2431 SV *tmpsv = av_shift(PL_preambleav);
2432 sv_catsv(PL_linestr, tmpsv);
2433 sv_catpv(PL_linestr, ";");
2436 sv_free((SV*)PL_preambleav);
2437 PL_preambleav = NULL;
2439 if (PL_minus_n || PL_minus_p) {
2440 sv_catpv(PL_linestr, "LINE: while (<>) {");
2442 sv_catpv(PL_linestr,"chomp;");
2444 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
2446 GvIMPORTED_AV_on(gv);
2448 if (strchr("/'\"", *PL_splitstr)
2449 && strchr(PL_splitstr + 1, *PL_splitstr))
2450 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
2453 s = "'~#\200\1'"; /* surely one char is unused...*/
2454 while (s[1] && strchr(PL_splitstr, *s)) s++;
2456 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s%c",
2457 "q" + (delim == '\''), delim);
2458 for (s = PL_splitstr; *s; s++) {
2460 sv_catpvn(PL_linestr, "\\", 1);
2461 sv_catpvn(PL_linestr, s, 1);
2463 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
2467 sv_catpv(PL_linestr,"@F=split(' ');");
2470 sv_catpv(PL_linestr, "\n");
2471 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2472 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2473 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2474 SV *sv = NEWSV(85,0);
2476 sv_upgrade(sv, SVt_PVMG);
2477 sv_setsv(sv,PL_linestr);
2478 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2484 bof = PL_rsfp && (PerlIO_tell(PL_rsfp) == 0); /* *Before* read! */
2485 s = filter_gets(PL_linestr, PL_rsfp, 0);
2489 if (PL_preprocess && !PL_in_eval)
2490 (void)PerlProc_pclose(PL_rsfp);
2491 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2492 PerlIO_clearerr(PL_rsfp);
2494 (void)PerlIO_close(PL_rsfp);
2496 PL_doextract = FALSE;
2498 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2499 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2500 sv_catpv(PL_linestr,";}");
2501 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2502 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2503 PL_minus_n = PL_minus_p = 0;
2506 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2507 sv_setpv(PL_linestr,"");
2508 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2510 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2511 s = swallow_bom((U8*)s);
2514 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2515 PL_doextract = FALSE;
2517 /* Incest with pod. */
2518 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2519 sv_setpv(PL_linestr, "");
2520 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2521 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2522 PL_doextract = FALSE;
2526 } while (PL_doextract);
2527 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2528 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2529 SV *sv = NEWSV(85,0);
2531 sv_upgrade(sv, SVt_PVMG);
2532 sv_setsv(sv,PL_linestr);
2533 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
2535 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2536 if (CopLINE(PL_curcop) == 1) {
2537 while (s < PL_bufend && isSPACE(*s))
2539 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2543 if (*s == '#' && *(s+1) == '!')
2545 #ifdef ALTERNATE_SHEBANG
2547 static char as[] = ALTERNATE_SHEBANG;
2548 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2549 d = s + (sizeof(as) - 1);
2551 #endif /* ALTERNATE_SHEBANG */
2560 while (*d && !isSPACE(*d))
2564 #ifdef ARG_ZERO_IS_SCRIPT
2565 if (ipathend > ipath) {
2567 * HP-UX (at least) sets argv[0] to the script name,
2568 * which makes $^X incorrect. And Digital UNIX and Linux,
2569 * at least, set argv[0] to the basename of the Perl
2570 * interpreter. So, having found "#!", we'll set it right.
2572 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2573 assert(SvPOK(x) || SvGMAGICAL(x));
2574 if (sv_eq(x, CopFILESV(PL_curcop))) {
2575 sv_setpvn(x, ipath, ipathend - ipath);
2578 TAINT_NOT; /* $^X is always tainted, but that's OK */
2580 #endif /* ARG_ZERO_IS_SCRIPT */
2585 d = instr(s,"perl -");
2587 d = instr(s,"perl");
2589 /* avoid getting into infinite loops when shebang
2590 * line contains "Perl" rather than "perl" */
2592 for (d = ipathend-4; d >= ipath; --d) {
2593 if ((*d == 'p' || *d == 'P')
2594 && !ibcmp(d, "perl", 4))
2604 #ifdef ALTERNATE_SHEBANG
2606 * If the ALTERNATE_SHEBANG on this system starts with a
2607 * character that can be part of a Perl expression, then if
2608 * we see it but not "perl", we're probably looking at the
2609 * start of Perl code, not a request to hand off to some
2610 * other interpreter. Similarly, if "perl" is there, but
2611 * not in the first 'word' of the line, we assume the line
2612 * contains the start of the Perl program.
2614 if (d && *s != '#') {
2616 while (*c && !strchr("; \t\r\n\f\v#", *c))
2619 d = Nullch; /* "perl" not in first word; ignore */
2621 *s = '#'; /* Don't try to parse shebang line */
2623 #endif /* ALTERNATE_SHEBANG */
2624 #ifndef MACOS_TRADITIONAL
2629 !instr(s,"indir") &&
2630 instr(PL_origargv[0],"perl"))
2636 while (s < PL_bufend && isSPACE(*s))
2638 if (s < PL_bufend) {
2639 Newz(899,newargv,PL_origargc+3,char*);
2641 while (s < PL_bufend && !isSPACE(*s))
2644 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2647 newargv = PL_origargv;
2649 PerlProc_execv(ipath, newargv);
2650 Perl_croak(aTHX_ "Can't exec %s", ipath);
2654 U32 oldpdb = PL_perldb;
2655 bool oldn = PL_minus_n;
2656 bool oldp = PL_minus_p;
2658 while (*d && !isSPACE(*d)) d++;
2659 while (SPACE_OR_TAB(*d)) d++;
2663 if (*d == 'M' || *d == 'm') {
2665 while (*d && !isSPACE(*d)) d++;
2666 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
2669 d = moreswitches(d);
2671 if ((PERLDB_LINE && !oldpdb) ||
2672 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
2673 /* if we have already added "LINE: while (<>) {",
2674 we must not do it again */
2676 sv_setpv(PL_linestr, "");
2677 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2678 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2679 PL_preambled = FALSE;
2681 (void)gv_fetchfile(PL_origfilename);
2688 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2690 PL_lex_state = LEX_FORMLINE;
2695 #ifdef PERL_STRICT_CR
2696 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
2698 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
2700 case ' ': case '\t': case '\f': case 013:
2701 #ifdef MACOS_TRADITIONAL
2708 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2709 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2710 /* handle eval qq[#line 1 "foo"\n ...] */
2711 CopLINE_dec(PL_curcop);
2715 while (s < d && *s != '\n')
2720 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2722 PL_lex_state = LEX_FORMLINE;
2732 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2737 while (s < PL_bufend && SPACE_OR_TAB(*s))
2740 if (strnEQ(s,"=>",2)) {
2741 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2742 OPERATOR('-'); /* unary minus */
2744 PL_last_uni = PL_oldbufptr;
2745 PL_last_lop_op = OP_FTEREAD; /* good enough */
2747 case 'r': FTST(OP_FTEREAD);
2748 case 'w': FTST(OP_FTEWRITE);
2749 case 'x': FTST(OP_FTEEXEC);
2750 case 'o': FTST(OP_FTEOWNED);
2751 case 'R': FTST(OP_FTRREAD);
2752 case 'W': FTST(OP_FTRWRITE);
2753 case 'X': FTST(OP_FTREXEC);
2754 case 'O': FTST(OP_FTROWNED);
2755 case 'e': FTST(OP_FTIS);
2756 case 'z': FTST(OP_FTZERO);
2757 case 's': FTST(OP_FTSIZE);
2758 case 'f': FTST(OP_FTFILE);
2759 case 'd': FTST(OP_FTDIR);
2760 case 'l': FTST(OP_FTLINK);
2761 case 'p': FTST(OP_FTPIPE);
2762 case 'S': FTST(OP_FTSOCK);
2763 case 'u': FTST(OP_FTSUID);
2764 case 'g': FTST(OP_FTSGID);
2765 case 'k': FTST(OP_FTSVTX);
2766 case 'b': FTST(OP_FTBLK);
2767 case 'c': FTST(OP_FTCHR);
2768 case 't': FTST(OP_FTTTY);
2769 case 'T': FTST(OP_FTTEXT);
2770 case 'B': FTST(OP_FTBINARY);
2771 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
2772 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
2773 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
2775 Perl_croak(aTHX_ "Unrecognized file test: -%c", (int)tmp);
2782 if (PL_expect == XOPERATOR)
2787 else if (*s == '>') {
2790 if (isIDFIRST_lazy_if(s,UTF)) {
2791 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2799 if (PL_expect == XOPERATOR)
2802 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2804 OPERATOR('-'); /* unary minus */
2811 if (PL_expect == XOPERATOR)
2816 if (PL_expect == XOPERATOR)
2819 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2825 if (PL_expect != XOPERATOR) {
2826 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2827 PL_expect = XOPERATOR;
2828 force_ident(PL_tokenbuf, '*');
2841 if (PL_expect == XOPERATOR) {
2845 PL_tokenbuf[0] = '%';
2846 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2847 if (!PL_tokenbuf[1]) {
2849 yyerror("Final % should be \\% or %name");
2852 PL_pending_ident = '%';
2871 switch (PL_expect) {
2874 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
2876 PL_bufptr = s; /* update in case we back off */
2882 PL_expect = XTERMBLOCK;
2886 while (isIDFIRST_lazy_if(s,UTF)) {
2887 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
2888 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
2889 if (tmp < 0) tmp = -tmp;
2904 d = scan_str(d,TRUE,TRUE);
2907 SvREFCNT_dec(PL_lex_stuff);
2908 PL_lex_stuff = Nullsv;
2910 /* MUST advance bufptr here to avoid bogus
2911 "at end of line" context messages from yyerror().
2913 PL_bufptr = s + len;
2914 yyerror("Unterminated attribute parameter in attribute list");
2917 return 0; /* EOF indicator */
2921 SV *sv = newSVpvn(s, len);
2922 sv_catsv(sv, PL_lex_stuff);
2923 attrs = append_elem(OP_LIST, attrs,
2924 newSVOP(OP_CONST, 0, sv));
2925 SvREFCNT_dec(PL_lex_stuff);
2926 PL_lex_stuff = Nullsv;
2929 attrs = append_elem(OP_LIST, attrs,
2930 newSVOP(OP_CONST, 0,
2934 if (*s == ':' && s[1] != ':')
2937 break; /* require real whitespace or :'s */
2939 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
2940 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
2941 char q = ((*s == '\'') ? '"' : '\'');
2942 /* If here for an expression, and parsed no attrs, back off. */
2943 if (tmp == '=' && !attrs) {
2947 /* MUST advance bufptr here to avoid bogus "at end of line"
2948 context messages from yyerror().
2952 yyerror("Unterminated attribute list");
2954 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
2962 PL_nextval[PL_nexttoke].opval = attrs;
2970 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
2971 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
2987 if (PL_lex_brackets <= 0)
2988 yyerror("Unmatched right square bracket");
2991 if (PL_lex_state == LEX_INTERPNORMAL) {
2992 if (PL_lex_brackets == 0) {
2993 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
2994 PL_lex_state = LEX_INTERPEND;
3001 if (PL_lex_brackets > 100) {
3002 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3003 if (newlb != PL_lex_brackstack) {
3005 PL_lex_brackstack = newlb;
3008 switch (PL_expect) {
3010 if (PL_lex_formbrack) {
3014 if (PL_oldoldbufptr == PL_last_lop)
3015 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3017 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3018 OPERATOR(HASHBRACK);
3020 while (s < PL_bufend && SPACE_OR_TAB(*s))
3023 PL_tokenbuf[0] = '\0';
3024 if (d < PL_bufend && *d == '-') {
3025 PL_tokenbuf[0] = '-';
3027 while (d < PL_bufend && SPACE_OR_TAB(*d))
3030 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3031 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
3033 while (d < PL_bufend && SPACE_OR_TAB(*d))
3036 char minus = (PL_tokenbuf[0] == '-');
3037 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3045 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3050 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3055 if (PL_oldoldbufptr == PL_last_lop)
3056 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
3058 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3061 OPERATOR(HASHBRACK);
3062 /* This hack serves to disambiguate a pair of curlies
3063 * as being a block or an anon hash. Normally, expectation
3064 * determines that, but in cases where we're not in a
3065 * position to expect anything in particular (like inside
3066 * eval"") we have to resolve the ambiguity. This code
3067 * covers the case where the first term in the curlies is a
3068 * quoted string. Most other cases need to be explicitly
3069 * disambiguated by prepending a `+' before the opening
3070 * curly in order to force resolution as an anon hash.
3072 * XXX should probably propagate the outer expectation
3073 * into eval"" to rely less on this hack, but that could
3074 * potentially break current behavior of eval"".
3078 if (*s == '\'' || *s == '"' || *s == '`') {
3079 /* common case: get past first string, handling escapes */
3080 for (t++; t < PL_bufend && *t != *s;)
3081 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3085 else if (*s == 'q') {
3088 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
3092 char open, close, term;
3095 while (t < PL_bufend && isSPACE(*t))
3099 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3103 for (t++; t < PL_bufend; t++) {
3104 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
3106 else if (*t == open)
3110 for (t++; t < PL_bufend; t++) {
3111 if (*t == '\\' && t+1 < PL_bufend)
3113 else if (*t == close && --brackets <= 0)
3115 else if (*t == open)
3121 else if (isALNUM_lazy_if(t,UTF)) {
3123 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
3126 while (t < PL_bufend && isSPACE(*t))
3128 /* if comma follows first term, call it an anon hash */
3129 /* XXX it could be a comma expression with loop modifiers */
3130 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
3131 || (*t == '=' && t[1] == '>')))
3132 OPERATOR(HASHBRACK);
3133 if (PL_expect == XREF)
3136 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3142 yylval.ival = CopLINE(PL_curcop);
3143 if (isSPACE(*s) || *s == '#')
3144 PL_copline = NOLINE; /* invalidate current command line number */
3149 if (PL_lex_brackets <= 0)
3150 yyerror("Unmatched right curly bracket");
3152 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
3153 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3154 PL_lex_formbrack = 0;
3155 if (PL_lex_state == LEX_INTERPNORMAL) {
3156 if (PL_lex_brackets == 0) {
3157 if (PL_expect & XFAKEBRACK) {
3158 PL_expect &= XENUMMASK;
3159 PL_lex_state = LEX_INTERPEND;
3161 return yylex(); /* ignore fake brackets */
3163 if (*s == '-' && s[1] == '>')
3164 PL_lex_state = LEX_INTERPENDMAYBE;
3165 else if (*s != '[' && *s != '{')
3166 PL_lex_state = LEX_INTERPEND;
3169 if (PL_expect & XFAKEBRACK) {
3170 PL_expect &= XENUMMASK;
3172 return yylex(); /* ignore fake brackets */
3182 if (PL_expect == XOPERATOR) {
3183 if (ckWARN(WARN_SEMICOLON)
3184 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3186 CopLINE_dec(PL_curcop);
3187 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3188 CopLINE_inc(PL_curcop);
3193 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3195 PL_expect = XOPERATOR;
3196 force_ident(PL_tokenbuf, '&');
3200 yylval.ival = (OPpENTERSUB_AMPER<<8);
3219 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
3220 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
3222 if (PL_expect == XSTATE && isALPHA(tmp) &&
3223 (s == PL_linestart+1 || s[-2] == '\n') )
3225 if (PL_in_eval && !PL_rsfp) {
3230 if (strnEQ(s,"=cut",4)) {
3244 PL_doextract = TRUE;
3247 if (PL_lex_brackets < PL_lex_formbrack) {
3249 #ifdef PERL_STRICT_CR
3250 for (t = s; SPACE_OR_TAB(*t); t++) ;
3252 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
3254 if (*t == '\n' || *t == '#') {
3272 if (PL_expect != XOPERATOR) {
3273 if (s[1] != '<' && !strchr(s,'>'))
3276 s = scan_heredoc(s);
3278 s = scan_inputsymbol(s);
3279 TERM(sublex_start());
3284 SHop(OP_LEFT_SHIFT);
3298 SHop(OP_RIGHT_SHIFT);
3307 if (PL_expect == XOPERATOR) {
3308 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3311 return ','; /* grandfather non-comma-format format */
3315 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3316 PL_tokenbuf[0] = '@';
3317 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3318 sizeof PL_tokenbuf - 1, FALSE);
3319 if (PL_expect == XOPERATOR)
3320 no_op("Array length", s);
3321 if (!PL_tokenbuf[1])
3323 PL_expect = XOPERATOR;
3324 PL_pending_ident = '#';
3328 PL_tokenbuf[0] = '$';
3329 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3330 sizeof PL_tokenbuf - 1, FALSE);
3331 if (PL_expect == XOPERATOR)
3333 if (!PL_tokenbuf[1]) {
3335 yyerror("Final $ should be \\$ or $name");
3339 /* This kludge not intended to be bulletproof. */
3340 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
3341 yylval.opval = newSVOP(OP_CONST, 0,
3342 newSViv(PL_compiling.cop_arybase));
3343 yylval.opval->op_private = OPpCONST_ARYBASE;
3349 if (PL_lex_state == LEX_NORMAL)
3352 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3355 PL_tokenbuf[0] = '@';
3356 if (ckWARN(WARN_SYNTAX)) {
3358 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
3361 PL_bufptr = skipspace(PL_bufptr);
3362 while (t < PL_bufend && *t != ']')
3364 Perl_warner(aTHX_ WARN_SYNTAX,
3365 "Multidimensional syntax %.*s not supported",
3366 (t - PL_bufptr) + 1, PL_bufptr);
3370 else if (*s == '{') {
3371 PL_tokenbuf[0] = '%';
3372 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
3373 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3375 char tmpbuf[sizeof PL_tokenbuf];
3377 for (t++; isSPACE(*t); t++) ;
3378 if (isIDFIRST_lazy_if(t,UTF)) {
3379 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
3380 for (; isSPACE(*t); t++) ;
3381 if (*t == ';' && get_cv(tmpbuf, FALSE))
3382 Perl_warner(aTHX_ WARN_SYNTAX,
3383 "You need to quote \"%s\"", tmpbuf);
3389 PL_expect = XOPERATOR;
3390 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3391 bool islop = (PL_last_lop == PL_oldoldbufptr);
3392 if (!islop || PL_last_lop_op == OP_GREPSTART)
3393 PL_expect = XOPERATOR;
3394 else if (strchr("$@\"'`q", *s))
3395 PL_expect = XTERM; /* e.g. print $fh "foo" */
3396 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3397 PL_expect = XTERM; /* e.g. print $fh &sub */
3398 else if (isIDFIRST_lazy_if(s,UTF)) {
3399 char tmpbuf[sizeof PL_tokenbuf];
3400 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3401 if ((tmp = keyword(tmpbuf, len))) {
3402 /* binary operators exclude handle interpretations */
3414 PL_expect = XTERM; /* e.g. print $fh length() */
3419 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3420 if (gv && GvCVu(gv))
3421 PL_expect = XTERM; /* e.g. print $fh subr() */
3424 else if (isDIGIT(*s))
3425 PL_expect = XTERM; /* e.g. print $fh 3 */
3426 else if (*s == '.' && isDIGIT(s[1]))
3427 PL_expect = XTERM; /* e.g. print $fh .3 */
3428 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3429 PL_expect = XTERM; /* e.g. print $fh -1 */
3430 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3431 PL_expect = XTERM; /* print $fh <<"EOF" */
3433 PL_pending_ident = '$';
3437 if (PL_expect == XOPERATOR)
3439 PL_tokenbuf[0] = '@';
3440 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3441 if (!PL_tokenbuf[1]) {
3443 yyerror("Final @ should be \\@ or @name");
3446 if (PL_lex_state == LEX_NORMAL)
3448 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
3450 PL_tokenbuf[0] = '%';
3452 /* Warn about @ where they meant $. */
3453 if (ckWARN(WARN_SYNTAX)) {
3454 if (*s == '[' || *s == '{') {
3456 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
3458 if (*t == '}' || *t == ']') {
3460 PL_bufptr = skipspace(PL_bufptr);
3461 Perl_warner(aTHX_ WARN_SYNTAX,
3462 "Scalar value %.*s better written as $%.*s",
3463 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
3468 PL_pending_ident = '@';
3471 case '/': /* may either be division or pattern */
3472 case '?': /* may either be conditional or pattern */
3473 if (PL_expect != XOPERATOR) {
3474 /* Disable warning on "study /blah/" */
3475 if (PL_oldoldbufptr == PL_last_uni
3476 && (*PL_last_uni != 's' || s - PL_last_uni < 5
3477 || memNE(PL_last_uni, "study", 5)
3478 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
3480 s = scan_pat(s,OP_MATCH);
3481 TERM(sublex_start());
3489 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3490 #ifdef PERL_STRICT_CR
3493 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3495 && (s == PL_linestart || s[-1] == '\n') )
3497 PL_lex_formbrack = 0;
3501 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
3507 yylval.ival = OPf_SPECIAL;
3513 if (PL_expect != XOPERATOR)
3518 case '0': case '1': case '2': case '3': case '4':
3519 case '5': case '6': case '7': case '8': case '9':
3521 if (PL_expect == XOPERATOR)
3526 s = scan_str(s,FALSE,FALSE);
3527 if (PL_expect == XOPERATOR) {
3528 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3531 return ','; /* grandfather non-comma-format format */
3537 missingterm((char*)0);
3538 yylval.ival = OP_CONST;
3539 TERM(sublex_start());
3542 s = scan_str(s,FALSE,FALSE);
3543 if (PL_expect == XOPERATOR) {
3544 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3547 return ','; /* grandfather non-comma-format format */
3553 missingterm((char*)0);
3554 yylval.ival = OP_CONST;
3555 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
3556 if (*d == '$' || *d == '@' || *d == '\\' || *d & 0x80) {
3557 yylval.ival = OP_STRINGIFY;
3561 TERM(sublex_start());
3564 s = scan_str(s,FALSE,FALSE);
3565 if (PL_expect == XOPERATOR)
3566 no_op("Backticks",s);
3568 missingterm((char*)0);
3569 yylval.ival = OP_BACKTICK;
3571 TERM(sublex_start());
3575 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
3576 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
3578 if (PL_expect == XOPERATOR)
3579 no_op("Backslash",s);
3583 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
3587 while (isDIGIT(*start) || *start == '_')
3589 if (*start == '.' && isDIGIT(start[1])) {
3593 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
3594 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF)) {
3598 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3608 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3647 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3649 /* Some keywords can be followed by any delimiter, including ':' */
3650 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3651 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3652 (PL_tokenbuf[0] == 'q' &&
3653 strchr("qwxr", PL_tokenbuf[1])))));
3655 /* x::* is just a word, unless x is "CORE" */
3656 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3660 while (d < PL_bufend && isSPACE(*d))
3661 d++; /* no comments skipped here, or s### is misparsed */
3663 /* Is this a label? */
3664 if (!tmp && PL_expect == XSTATE
3665 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3667 yylval.pval = savepv(PL_tokenbuf);
3672 /* Check for keywords */
3673 tmp = keyword(PL_tokenbuf, len);
3675 /* Is this a word before a => operator? */
3676 if (*d == '=' && d[1] == '>') {
3678 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3679 yylval.opval->op_private = OPpCONST_BARE;
3683 if (tmp < 0) { /* second-class keyword? */
3684 GV *ogv = Nullgv; /* override (winner) */
3685 GV *hgv = Nullgv; /* hidden (loser) */
3686 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3688 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3691 if (GvIMPORTED_CV(gv))
3693 else if (! CvMETHOD(cv))
3697 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3698 (gv = *gvp) != (GV*)&PL_sv_undef &&
3699 GvCVu(gv) && GvIMPORTED_CV(gv))
3705 tmp = 0; /* overridden by import or by GLOBAL */
3708 && -tmp==KEY_lock /* XXX generalizable kludge */
3710 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3712 tmp = 0; /* any sub overrides "weak" keyword */
3714 else { /* no override */
3718 if (ckWARN(WARN_AMBIGUOUS) && hgv
3719 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3720 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3721 "Ambiguous call resolved as CORE::%s(), %s",
3722 GvENAME(hgv), "qualify as such or use &");
3729 default: /* not a keyword */
3732 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3734 /* Get the rest if it looks like a package qualifier */
3736 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
3738 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3741 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
3742 *s == '\'' ? "'" : "::");
3746 if (PL_expect == XOPERATOR) {
3747 if (PL_bufptr == PL_linestart) {
3748 CopLINE_dec(PL_curcop);
3749 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
3750 CopLINE_inc(PL_curcop);
3753 no_op("Bareword",s);
3756 /* Look for a subroutine with this name in current package,
3757 unless name is "Foo::", in which case Foo is a bearword
3758 (and a package name). */
3761 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3763 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3764 Perl_warner(aTHX_ WARN_BAREWORD,
3765 "Bareword \"%s\" refers to nonexistent package",
3768 PL_tokenbuf[len] = '\0';
3775 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3778 /* if we saw a global override before, get the right name */
3781 sv = newSVpvn("CORE::GLOBAL::",14);
3782 sv_catpv(sv,PL_tokenbuf);
3785 sv = newSVpv(PL_tokenbuf,0);
3787 /* Presume this is going to be a bareword of some sort. */
3790 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3791 yylval.opval->op_private = OPpCONST_BARE;
3793 /* And if "Foo::", then that's what it certainly is. */
3798 /* See if it's the indirect object for a list operator. */
3800 if (PL_oldoldbufptr &&
3801 PL_oldoldbufptr < PL_bufptr &&
3802 (PL_oldoldbufptr == PL_last_lop
3803 || PL_oldoldbufptr == PL_last_uni) &&
3804 /* NO SKIPSPACE BEFORE HERE! */
3805 (PL_expect == XREF ||
3806 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
3808 bool immediate_paren = *s == '(';
3810 /* (Now we can afford to cross potential line boundary.) */
3813 /* Two barewords in a row may indicate method call. */
3815 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
3818 /* If not a declared subroutine, it's an indirect object. */
3819 /* (But it's an indir obj regardless for sort.) */
3821 if ((PL_last_lop_op == OP_SORT ||
3822 (!immediate_paren && (!gv || !GvCVu(gv)))) &&
3823 (PL_last_lop_op != OP_MAPSTART &&
3824 PL_last_lop_op != OP_GREPSTART))
3826 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3832 PL_expect = XOPERATOR;
3835 /* Is this a word before a => operator? */
3836 if (*s == '=' && s[1] == '>') {
3838 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
3842 /* If followed by a paren, it's certainly a subroutine. */
3845 if (gv && GvCVu(gv)) {
3846 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
3847 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
3852 PL_nextval[PL_nexttoke].opval = yylval.opval;
3853 PL_expect = XOPERATOR;
3859 /* If followed by var or block, call it a method (unless sub) */
3861 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3862 PL_last_lop = PL_oldbufptr;
3863 PL_last_lop_op = OP_METHOD;
3867 /* If followed by a bareword, see if it looks like indir obj. */
3869 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
3872 /* Not a method, so call it a subroutine (if defined) */
3874 if (gv && GvCVu(gv)) {
3876 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
3877 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3878 "Ambiguous use of -%s resolved as -&%s()",
3879 PL_tokenbuf, PL_tokenbuf);
3880 /* Check for a constant sub */
3882 if ((sv = cv_const_sv(cv))) {
3884 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3885 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3886 yylval.opval->op_private = 0;
3890 /* Resolve to GV now. */
3891 op_free(yylval.opval);
3892 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3893 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
3894 PL_last_lop = PL_oldbufptr;
3895 PL_last_lop_op = OP_ENTERSUB;
3896 /* Is there a prototype? */
3899 char *proto = SvPV((SV*)cv, len);
3902 if (strEQ(proto, "$"))
3904 if (*proto == '&' && *s == '{') {
3905 sv_setpv(PL_subname,"__ANON__");
3909 PL_nextval[PL_nexttoke].opval = yylval.opval;
3915 /* Call it a bare word */
3917 if (PL_hints & HINT_STRICT_SUBS)
3918 yylval.opval->op_private |= OPpCONST_STRICT;
3921 if (ckWARN(WARN_RESERVED)) {
3922 if (lastchar != '-') {
3923 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
3925 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
3932 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
3933 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3934 "Operator or semicolon missing before %c%s",
3935 lastchar, PL_tokenbuf);
3936 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3937 "Ambiguous use of %c resolved as operator %c",
3938 lastchar, lastchar);
3944 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3945 newSVpv(CopFILE(PL_curcop),0));
3949 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3950 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
3953 case KEY___PACKAGE__:
3954 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3956 ? newSVsv(PL_curstname)
3965 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
3966 char *pname = "main";
3967 if (PL_tokenbuf[2] == 'D')
3968 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
3969 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
3972 GvIOp(gv) = newIO();
3973 IoIFP(GvIOp(gv)) = PL_rsfp;
3974 #if defined(HAS_FCNTL) && defined(F_SETFD)
3976 int fd = PerlIO_fileno(PL_rsfp);
3977 fcntl(fd,F_SETFD,fd >= 3);
3980 /* Mark this internal pseudo-handle as clean */
3981 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3983 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
3984 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
3985 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
3987 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
3988 #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
3989 /* if the script was opened in binmode, we need to revert
3990 * it to text mode for compatibility; but only iff it has CRs
3991 * XXX this is a questionable hack at best. */
3992 if (PL_bufend-PL_bufptr > 2
3993 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
3996 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
3997 loc = PerlIO_tell(PL_rsfp);
3998 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4000 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
4001 #if defined(__BORLANDC__)
4002 /* XXX see note in do_binmode() */
4003 ((FILE*)PL_rsfp)->flags |= _F_BIN;
4006 PerlIO_seek(PL_rsfp, loc, 0);
4021 if (PL_expect == XSTATE) {
4028 if (*s == ':' && s[1] == ':') {
4031 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
4032 if (!(tmp = keyword(PL_tokenbuf, len)))
4033 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
4047 LOP(OP_ACCEPT,XTERM);
4053 LOP(OP_ATAN2,XTERM);
4059 LOP(OP_BINMODE,XTERM);
4062 LOP(OP_BLESS,XTERM);
4071 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
4088 if (!PL_cryptseen) {
4089 PL_cryptseen = TRUE;
4093 LOP(OP_CRYPT,XTERM);
4096 if (ckWARN(WARN_CHMOD)) {
4097 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4098 if (*d != '0' && isDIGIT(*d))
4099 Perl_warner(aTHX_ WARN_CHMOD,
4100 "chmod() mode argument is missing initial 0");
4102 LOP(OP_CHMOD,XTERM);
4105 LOP(OP_CHOWN,XTERM);
4108 LOP(OP_CONNECT,XTERM);
4124 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4128 PL_hints |= HINT_BLOCK_SCOPE;
4138 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4139 LOP(OP_DBMOPEN,XTERM);
4145 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4152 yylval.ival = CopLINE(PL_curcop);
4166 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
4167 UNIBRACK(OP_ENTEREVAL);
4182 case KEY_endhostent:
4188 case KEY_endservent:
4191 case KEY_endprotoent:
4202 yylval.ival = CopLINE(PL_curcop);
4204 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
4206 if ((PL_bufend - p) >= 3 &&
4207 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4209 else if ((PL_bufend - p) >= 4 &&
4210 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4213 if (isIDFIRST_lazy_if(p,UTF)) {
4214 p = scan_ident(p, PL_bufend,
4215 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4219 Perl_croak(aTHX_ "Missing $ on loop variable");
4224 LOP(OP_FORMLINE,XTERM);
4230 LOP(OP_FCNTL,XTERM);
4236 LOP(OP_FLOCK,XTERM);
4245 LOP(OP_GREPSTART, XREF);
4248 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4263 case KEY_getpriority:
4264 LOP(OP_GETPRIORITY,XTERM);
4266 case KEY_getprotobyname:
4269 case KEY_getprotobynumber:
4270 LOP(OP_GPBYNUMBER,XTERM);
4272 case KEY_getprotoent:
4284 case KEY_getpeername:
4285 UNI(OP_GETPEERNAME);
4287 case KEY_gethostbyname:
4290 case KEY_gethostbyaddr:
4291 LOP(OP_GHBYADDR,XTERM);
4293 case KEY_gethostent:
4296 case KEY_getnetbyname:
4299 case KEY_getnetbyaddr:
4300 LOP(OP_GNBYADDR,XTERM);
4305 case KEY_getservbyname:
4306 LOP(OP_GSBYNAME,XTERM);
4308 case KEY_getservbyport:
4309 LOP(OP_GSBYPORT,XTERM);
4311 case KEY_getservent:
4314 case KEY_getsockname:
4315 UNI(OP_GETSOCKNAME);
4317 case KEY_getsockopt:
4318 LOP(OP_GSOCKOPT,XTERM);
4340 yylval.ival = CopLINE(PL_curcop);
4344 LOP(OP_INDEX,XTERM);
4350 LOP(OP_IOCTL,XTERM);
4362 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4394 LOP(OP_LISTEN,XTERM);
4403 s = scan_pat(s,OP_MATCH);
4404 TERM(sublex_start());
4407 LOP(OP_MAPSTART, XREF);
4410 LOP(OP_MKDIR,XTERM);
4413 LOP(OP_MSGCTL,XTERM);
4416 LOP(OP_MSGGET,XTERM);
4419 LOP(OP_MSGRCV,XTERM);
4422 LOP(OP_MSGSND,XTERM);
4428 if (isIDFIRST_lazy_if(s,UTF)) {
4429 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
4430 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4432 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
4433 if (!PL_in_my_stash) {
4436 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
4444 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4451 if (PL_expect != XSTATE)
4452 yyerror("\"no\" not allowed in expression");
4453 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4454 s = force_version(s);
4459 if (*s == '(' || (s = skipspace(s), *s == '('))
4466 if (isIDFIRST_lazy_if(s,UTF)) {
4468 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
4470 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4471 Perl_warner(aTHX_ WARN_PRECEDENCE,
4472 "Precedence problem: open %.*s should be open(%.*s)",
4478 yylval.ival = OP_OR;
4488 LOP(OP_OPEN_DIR,XTERM);
4491 checkcomma(s,PL_tokenbuf,"filehandle");
4495 checkcomma(s,PL_tokenbuf,"filehandle");
4514 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4518 LOP(OP_PIPE_OP,XTERM);
4521 s = scan_str(s,FALSE,FALSE);
4523 missingterm((char*)0);
4524 yylval.ival = OP_CONST;
4525 TERM(sublex_start());
4531 s = scan_str(s,FALSE,FALSE);
4533 missingterm((char*)0);
4535 if (SvCUR(PL_lex_stuff)) {
4538 d = SvPV_force(PL_lex_stuff, len);
4540 for (; isSPACE(*d) && len; --len, ++d) ;
4543 if (!warned && ckWARN(WARN_QW)) {
4544 for (; !isSPACE(*d) && len; --len, ++d) {
4546 Perl_warner(aTHX_ WARN_QW,
4547 "Possible attempt to separate words with commas");
4550 else if (*d == '#') {
4551 Perl_warner(aTHX_ WARN_QW,
4552 "Possible attempt to put comments in qw() list");
4558 for (; !isSPACE(*d) && len; --len, ++d) ;
4560 words = append_elem(OP_LIST, words,
4561 newSVOP(OP_CONST, 0, tokeq(newSVpvn(b, d-b))));
4565 PL_nextval[PL_nexttoke].opval = words;
4570 SvREFCNT_dec(PL_lex_stuff);
4571 PL_lex_stuff = Nullsv;
4576 s = scan_str(s,FALSE,FALSE);
4578 missingterm((char*)0);
4579 yylval.ival = OP_STRINGIFY;
4580 if (SvIVX(PL_lex_stuff) == '\'')
4581 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
4582 TERM(sublex_start());
4585 s = scan_pat(s,OP_QR);
4586 TERM(sublex_start());
4589 s = scan_str(s,FALSE,FALSE);
4591 missingterm((char*)0);
4592 yylval.ival = OP_BACKTICK;
4594 TERM(sublex_start());
4601 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4602 s = force_version(s);
4605 *PL_tokenbuf = '\0';
4606 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4607 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
4608 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4610 yyerror("<> should be quotes");
4618 s = force_word(s,WORD,TRUE,FALSE,FALSE);
4622 LOP(OP_RENAME,XTERM);
4631 LOP(OP_RINDEX,XTERM);
4654 LOP(OP_REVERSE,XTERM);
4665 TERM(sublex_start());
4667 TOKEN(1); /* force error */
4676 LOP(OP_SELECT,XTERM);
4682 LOP(OP_SEMCTL,XTERM);
4685 LOP(OP_SEMGET,XTERM);
4688 LOP(OP_SEMOP,XTERM);
4694 LOP(OP_SETPGRP,XTERM);
4696 case KEY_setpriority:
4697 LOP(OP_SETPRIORITY,XTERM);
4699 case KEY_sethostent:
4705 case KEY_setservent:
4708 case KEY_setprotoent:
4718 LOP(OP_SEEKDIR,XTERM);
4720 case KEY_setsockopt:
4721 LOP(OP_SSOCKOPT,XTERM);
4727 LOP(OP_SHMCTL,XTERM);
4730 LOP(OP_SHMGET,XTERM);
4733 LOP(OP_SHMREAD,XTERM);
4736 LOP(OP_SHMWRITE,XTERM);
4739 LOP(OP_SHUTDOWN,XTERM);
4748 LOP(OP_SOCKET,XTERM);
4750 case KEY_socketpair:
4751 LOP(OP_SOCKPAIR,XTERM);
4754 checkcomma(s,PL_tokenbuf,"subroutine name");
4756 if (*s == ';' || *s == ')') /* probably a close */
4757 Perl_croak(aTHX_ "sort is now a reserved word");
4759 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4763 LOP(OP_SPLIT,XTERM);
4766 LOP(OP_SPRINTF,XTERM);
4769 LOP(OP_SPLICE,XTERM);
4784 LOP(OP_SUBSTR,XTERM);
4790 char tmpbuf[sizeof PL_tokenbuf];
4792 expectation attrful;
4793 bool have_name, have_proto;
4798 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
4799 (*s == ':' && s[1] == ':'))
4802 attrful = XATTRBLOCK;
4803 /* remember buffer pos'n for later force_word */
4804 tboffset = s - PL_oldbufptr;
4805 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4806 if (strchr(tmpbuf, ':'))
4807 sv_setpv(PL_subname, tmpbuf);
4809 sv_setsv(PL_subname,PL_curstname);
4810 sv_catpvn(PL_subname,"::",2);
4811 sv_catpvn(PL_subname,tmpbuf,len);
4818 Perl_croak(aTHX_ "Missing name in \"my sub\"");
4819 PL_expect = XTERMBLOCK;
4820 attrful = XATTRTERM;
4821 sv_setpv(PL_subname,"?");
4825 if (key == KEY_format) {
4827 PL_lex_formbrack = PL_lex_brackets + 1;
4829 (void) force_word(PL_oldbufptr + tboffset, WORD,
4834 /* Look for a prototype */
4838 s = scan_str(s,FALSE,FALSE);
4841 SvREFCNT_dec(PL_lex_stuff);
4842 PL_lex_stuff = Nullsv;
4843 Perl_croak(aTHX_ "Prototype not terminated");
4846 d = SvPVX(PL_lex_stuff);
4848 for (p = d; *p; ++p) {
4853 SvCUR(PL_lex_stuff) = tmp;
4861 if (*s == ':' && s[1] != ':')
4862 PL_expect = attrful;
4865 PL_nextval[PL_nexttoke].opval =
4866 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4867 PL_lex_stuff = Nullsv;
4871 sv_setpv(PL_subname,"__ANON__");
4874 (void) force_word(PL_oldbufptr + tboffset, WORD,
4883 LOP(OP_SYSTEM,XREF);
4886 LOP(OP_SYMLINK,XTERM);
4889 LOP(OP_SYSCALL,XTERM);
4892 LOP(OP_SYSOPEN,XTERM);
4895 LOP(OP_SYSSEEK,XTERM);
4898 LOP(OP_SYSREAD,XTERM);
4901 LOP(OP_SYSWRITE,XTERM);
4905 TERM(sublex_start());
4926 LOP(OP_TRUNCATE,XTERM);
4938 yylval.ival = CopLINE(PL_curcop);
4942 yylval.ival = CopLINE(PL_curcop);
4946 LOP(OP_UNLINK,XTERM);
4952 LOP(OP_UNPACK,XTERM);
4955 LOP(OP_UTIME,XTERM);
4958 if (ckWARN(WARN_UMASK)) {
4959 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4960 if (*d != '0' && isDIGIT(*d))
4961 Perl_warner(aTHX_ WARN_UMASK,
4962 "umask: argument is missing initial 0");
4967 LOP(OP_UNSHIFT,XTERM);
4970 if (PL_expect != XSTATE)
4971 yyerror("\"use\" not allowed in expression");
4973 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
4974 s = force_version(s);
4975 if (*s == ';' || (s = skipspace(s), *s == ';')) {
4976 PL_nextval[PL_nexttoke].opval = Nullop;
4981 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4982 s = force_version(s);
4994 yylval.ival = CopLINE(PL_curcop);
4998 PL_hints |= HINT_BLOCK_SCOPE;
5005 LOP(OP_WAITPID,XTERM);
5013 static char ctl_l[2];
5015 if (ctl_l[0] == '\0')
5016 ctl_l[0] = toCTRL('L');
5017 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5020 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5025 if (PL_expect == XOPERATOR)
5031 yylval.ival = OP_XOR;
5036 TERM(sublex_start());
5041 #pragma segment Main
5045 Perl_keyword(pTHX_ register char *d, I32 len)
5050 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
5051 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5052 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
5053 if (strEQ(d,"__DATA__")) return KEY___DATA__;
5054 if (strEQ(d,"__END__")) return KEY___END__;
5058 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5063 if (strEQ(d,"and")) return -KEY_and;
5064 if (strEQ(d,"abs")) return -KEY_abs;
5067 if (strEQ(d,"alarm")) return -KEY_alarm;
5068 if (strEQ(d,"atan2")) return -KEY_atan2;
5071 if (strEQ(d,"accept")) return -KEY_accept;
5076 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
5079 if (strEQ(d,"bless")) return -KEY_bless;
5080 if (strEQ(d,"bind")) return -KEY_bind;
5081 if (strEQ(d,"binmode")) return -KEY_binmode;
5084 if (strEQ(d,"CORE")) return -KEY_CORE;
5085 if (strEQ(d,"CHECK")) return KEY_CHECK;
5090 if (strEQ(d,"cmp")) return -KEY_cmp;
5091 if (strEQ(d,"chr")) return -KEY_chr;
5092 if (strEQ(d,"cos")) return -KEY_cos;
5095 if (strEQ(d,"chop")) return KEY_chop;
5098 if (strEQ(d,"close")) return -KEY_close;
5099 if (strEQ(d,"chdir")) return -KEY_chdir;
5100 if (strEQ(d,"chomp")) return KEY_chomp;
5101 if (strEQ(d,"chmod")) return -KEY_chmod;
5102 if (strEQ(d,"chown")) return -KEY_chown;
5103 if (strEQ(d,"crypt")) return -KEY_crypt;
5106 if (strEQ(d,"chroot")) return -KEY_chroot;
5107 if (strEQ(d,"caller")) return -KEY_caller;
5110 if (strEQ(d,"connect")) return -KEY_connect;
5113 if (strEQ(d,"closedir")) return -KEY_closedir;
5114 if (strEQ(d,"continue")) return -KEY_continue;
5119 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5124 if (strEQ(d,"do")) return KEY_do;
5127 if (strEQ(d,"die")) return -KEY_die;
5130 if (strEQ(d,"dump")) return -KEY_dump;
5133 if (strEQ(d,"delete")) return KEY_delete;
5136 if (strEQ(d,"defined")) return KEY_defined;
5137 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
5140 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
5145 if (strEQ(d,"END")) return KEY_END;
5150 if (strEQ(d,"eq")) return -KEY_eq;
5153 if (strEQ(d,"eof")) return -KEY_eof;
5154 if (strEQ(d,"exp")) return -KEY_exp;
5157 if (strEQ(d,"else")) return KEY_else;
5158 if (strEQ(d,"exit")) return -KEY_exit;
5159 if (strEQ(d,"eval")) return KEY_eval;
5160 if (strEQ(d,"exec")) return -KEY_exec;
5161 if (strEQ(d,"each")) return KEY_each;
5164 if (strEQ(d,"elsif")) return KEY_elsif;
5167 if (strEQ(d,"exists")) return KEY_exists;
5168 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
5171 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5172 if (strEQ(d,"endpwent")) return -KEY_endpwent;
5175 if (strEQ(d,"endnetent")) return -KEY_endnetent;
5178 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5179 if (strEQ(d,"endservent")) return -KEY_endservent;
5182 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
5189 if (strEQ(d,"for")) return KEY_for;
5192 if (strEQ(d,"fork")) return -KEY_fork;
5195 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5196 if (strEQ(d,"flock")) return -KEY_flock;
5199 if (strEQ(d,"format")) return KEY_format;
5200 if (strEQ(d,"fileno")) return -KEY_fileno;
5203 if (strEQ(d,"foreach")) return KEY_foreach;
5206 if (strEQ(d,"formline")) return -KEY_formline;
5211 if (strnEQ(d,"get",3)) {
5216 if (strEQ(d,"ppid")) return -KEY_getppid;
5217 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
5220 if (strEQ(d,"pwent")) return -KEY_getpwent;
5221 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5222 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
5225 if (strEQ(d,"peername")) return -KEY_getpeername;
5226 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5227 if (strEQ(d,"priority")) return -KEY_getpriority;
5230 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
5233 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
5237 else if (*d == 'h') {
5238 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5239 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5240 if (strEQ(d,"hostent")) return -KEY_gethostent;
5242 else if (*d == 'n') {
5243 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5244 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5245 if (strEQ(d,"netent")) return -KEY_getnetent;
5247 else if (*d == 's') {
5248 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5249 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5250 if (strEQ(d,"servent")) return -KEY_getservent;
5251 if (strEQ(d,"sockname")) return -KEY_getsockname;
5252 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
5254 else if (*d == 'g') {
5255 if (strEQ(d,"grent")) return -KEY_getgrent;
5256 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5257 if (strEQ(d,"grgid")) return -KEY_getgrgid;
5259 else if (*d == 'l') {
5260 if (strEQ(d,"login")) return -KEY_getlogin;
5262 else if (strEQ(d,"c")) return -KEY_getc;
5267 if (strEQ(d,"gt")) return -KEY_gt;
5268 if (strEQ(d,"ge")) return -KEY_ge;
5271 if (strEQ(d,"grep")) return KEY_grep;
5272 if (strEQ(d,"goto")) return KEY_goto;
5273 if (strEQ(d,"glob")) return KEY_glob;
5276 if (strEQ(d,"gmtime")) return -KEY_gmtime;
5281 if (strEQ(d,"hex")) return -KEY_hex;
5284 if (strEQ(d,"INIT")) return KEY_INIT;
5289 if (strEQ(d,"if")) return KEY_if;
5292 if (strEQ(d,"int")) return -KEY_int;
5295 if (strEQ(d,"index")) return -KEY_index;
5296 if (strEQ(d,"ioctl")) return -KEY_ioctl;
5301 if (strEQ(d,"join")) return -KEY_join;
5305 if (strEQ(d,"keys")) return KEY_keys;
5306 if (strEQ(d,"kill")) return -KEY_kill;
5312 if (strEQ(d,"lt")) return -KEY_lt;
5313 if (strEQ(d,"le")) return -KEY_le;
5314 if (strEQ(d,"lc")) return -KEY_lc;
5317 if (strEQ(d,"log")) return -KEY_log;
5320 if (strEQ(d,"last")) return KEY_last;
5321 if (strEQ(d,"link")) return -KEY_link;
5322 if (strEQ(d,"lock")) return -KEY_lock;
5325 if (strEQ(d,"local")) return KEY_local;
5326 if (strEQ(d,"lstat")) return -KEY_lstat;
5329 if (strEQ(d,"length")) return -KEY_length;
5330 if (strEQ(d,"listen")) return -KEY_listen;
5333 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
5336 if (strEQ(d,"localtime")) return -KEY_localtime;
5342 case 1: return KEY_m;
5344 if (strEQ(d,"my")) return KEY_my;
5347 if (strEQ(d,"map")) return KEY_map;
5350 if (strEQ(d,"mkdir")) return -KEY_mkdir;
5353 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5354 if (strEQ(d,"msgget")) return -KEY_msgget;
5355 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5356 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
5361 if (strEQ(d,"next")) return KEY_next;
5362 if (strEQ(d,"ne")) return -KEY_ne;
5363 if (strEQ(d,"not")) return -KEY_not;
5364 if (strEQ(d,"no")) return KEY_no;
5369 if (strEQ(d,"or")) return -KEY_or;
5372 if (strEQ(d,"ord")) return -KEY_ord;
5373 if (strEQ(d,"oct")) return -KEY_oct;
5374 if (strEQ(d,"our")) return KEY_our;
5377 if (strEQ(d,"open")) return -KEY_open;
5380 if (strEQ(d,"opendir")) return -KEY_opendir;
5387 if (strEQ(d,"pop")) return KEY_pop;
5388 if (strEQ(d,"pos")) return KEY_pos;
5391 if (strEQ(d,"push")) return KEY_push;
5392 if (strEQ(d,"pack")) return -KEY_pack;
5393 if (strEQ(d,"pipe")) return -KEY_pipe;
5396 if (strEQ(d,"print")) return KEY_print;
5399 if (strEQ(d,"printf")) return KEY_printf;
5402 if (strEQ(d,"package")) return KEY_package;
5405 if (strEQ(d,"prototype")) return KEY_prototype;
5410 if (strEQ(d,"q")) return KEY_q;
5411 if (strEQ(d,"qr")) return KEY_qr;
5412 if (strEQ(d,"qq")) return KEY_qq;
5413 if (strEQ(d,"qw")) return KEY_qw;
5414 if (strEQ(d,"qx")) return KEY_qx;
5416 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
5421 if (strEQ(d,"ref")) return -KEY_ref;
5424 if (strEQ(d,"read")) return -KEY_read;
5425 if (strEQ(d,"rand")) return -KEY_rand;
5426 if (strEQ(d,"recv")) return -KEY_recv;
5427 if (strEQ(d,"redo")) return KEY_redo;
5430 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5431 if (strEQ(d,"reset")) return -KEY_reset;
5434 if (strEQ(d,"return")) return KEY_return;
5435 if (strEQ(d,"rename")) return -KEY_rename;
5436 if (strEQ(d,"rindex")) return -KEY_rindex;
5439 if (strEQ(d,"require")) return -KEY_require;
5440 if (strEQ(d,"reverse")) return -KEY_reverse;
5441 if (strEQ(d,"readdir")) return -KEY_readdir;
5444 if (strEQ(d,"readlink")) return -KEY_readlink;
5445 if (strEQ(d,"readline")) return -KEY_readline;
5446 if (strEQ(d,"readpipe")) return -KEY_readpipe;
5449 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
5455 case 0: return KEY_s;
5457 if (strEQ(d,"scalar")) return KEY_scalar;
5462 if (strEQ(d,"seek")) return -KEY_seek;
5463 if (strEQ(d,"send")) return -KEY_send;
5466 if (strEQ(d,"semop")) return -KEY_semop;
5469 if (strEQ(d,"select")) return -KEY_select;
5470 if (strEQ(d,"semctl")) return -KEY_semctl;
5471 if (strEQ(d,"semget")) return -KEY_semget;
5474 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5475 if (strEQ(d,"seekdir")) return -KEY_seekdir;
5478 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5479 if (strEQ(d,"setgrent")) return -KEY_setgrent;
5482 if (strEQ(d,"setnetent")) return -KEY_setnetent;
5485 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5486 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5487 if (strEQ(d,"setservent")) return -KEY_setservent;
5490 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5491 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
5498 if (strEQ(d,"shift")) return KEY_shift;
5501 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5502 if (strEQ(d,"shmget")) return -KEY_shmget;
5505 if (strEQ(d,"shmread")) return -KEY_shmread;
5508 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5509 if (strEQ(d,"shutdown")) return -KEY_shutdown;
5514 if (strEQ(d,"sin")) return -KEY_sin;
5517 if (strEQ(d,"sleep")) return -KEY_sleep;
5520 if (strEQ(d,"sort")) return KEY_sort;
5521 if (strEQ(d,"socket")) return -KEY_socket;
5522 if (strEQ(d,"socketpair")) return -KEY_socketpair;
5525 if (strEQ(d,"split")) return KEY_split;
5526 if (strEQ(d,"sprintf")) return -KEY_sprintf;
5527 if (strEQ(d,"splice")) return KEY_splice;
5530 if (strEQ(d,"sqrt")) return -KEY_sqrt;
5533 if (strEQ(d,"srand")) return -KEY_srand;
5536 if (strEQ(d,"stat")) return -KEY_stat;
5537 if (strEQ(d,"study")) return KEY_study;
5540 if (strEQ(d,"substr")) return -KEY_substr;
5541 if (strEQ(d,"sub")) return KEY_sub;
5546 if (strEQ(d,"system")) return -KEY_system;
5549 if (strEQ(d,"symlink")) return -KEY_symlink;
5550 if (strEQ(d,"syscall")) return -KEY_syscall;
5551 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5552 if (strEQ(d,"sysread")) return -KEY_sysread;
5553 if (strEQ(d,"sysseek")) return -KEY_sysseek;
5556 if (strEQ(d,"syswrite")) return -KEY_syswrite;
5565 if (strEQ(d,"tr")) return KEY_tr;
5568 if (strEQ(d,"tie")) return KEY_tie;
5571 if (strEQ(d,"tell")) return -KEY_tell;
5572 if (strEQ(d,"tied")) return KEY_tied;
5573 if (strEQ(d,"time")) return -KEY_time;
5576 if (strEQ(d,"times")) return -KEY_times;
5579 if (strEQ(d,"telldir")) return -KEY_telldir;
5582 if (strEQ(d,"truncate")) return -KEY_truncate;
5589 if (strEQ(d,"uc")) return -KEY_uc;
5592 if (strEQ(d,"use")) return KEY_use;
5595 if (strEQ(d,"undef")) return KEY_undef;
5596 if (strEQ(d,"until")) return KEY_until;
5597 if (strEQ(d,"untie")) return KEY_untie;
5598 if (strEQ(d,"utime")) return -KEY_utime;
5599 if (strEQ(d,"umask")) return -KEY_umask;
5602 if (strEQ(d,"unless")) return KEY_unless;
5603 if (strEQ(d,"unpack")) return -KEY_unpack;
5604 if (strEQ(d,"unlink")) return -KEY_unlink;
5607 if (strEQ(d,"unshift")) return KEY_unshift;
5608 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
5613 if (strEQ(d,"values")) return -KEY_values;
5614 if (strEQ(d,"vec")) return -KEY_vec;
5619 if (strEQ(d,"warn")) return -KEY_warn;
5620 if (strEQ(d,"wait")) return -KEY_wait;
5623 if (strEQ(d,"while")) return KEY_while;
5624 if (strEQ(d,"write")) return -KEY_write;
5627 if (strEQ(d,"waitpid")) return -KEY_waitpid;
5630 if (strEQ(d,"wantarray")) return -KEY_wantarray;
5635 if (len == 1) return -KEY_x;
5636 if (strEQ(d,"xor")) return -KEY_xor;
5639 if (len == 1) return KEY_y;
5648 S_checkcomma(pTHX_ register char *s, char *name, char *what)
5652 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
5653 dTHR; /* only for ckWARN */
5654 if (ckWARN(WARN_SYNTAX)) {
5656 for (w = s+2; *w && level; w++) {
5663 for (; *w && isSPACE(*w); w++) ;
5664 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
5665 Perl_warner(aTHX_ WARN_SYNTAX,
5666 "%s (...) interpreted as function",name);
5669 while (s < PL_bufend && isSPACE(*s))
5673 while (s < PL_bufend && isSPACE(*s))
5675 if (isIDFIRST_lazy_if(s,UTF)) {
5677 while (isALNUM_lazy_if(s,UTF))
5679 while (s < PL_bufend && isSPACE(*s))
5684 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
5688 Perl_croak(aTHX_ "No comma allowed after %s", what);
5693 /* Either returns sv, or mortalizes sv and returns a new SV*.
5694 Best used as sv=new_constant(..., sv, ...).
5695 If s, pv are NULL, calls subroutine with one argument,
5696 and type is used with error messages only. */
5699 S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
5703 HV *table = GvHV(PL_hintgv); /* ^H */
5707 const char *why1, *why2, *why3;
5709 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
5712 why1 = "%^H is not consistent";
5713 why2 = strEQ(key,"charnames")
5714 ? " (missing \"use charnames ...\"?)"
5718 msg = Perl_newSVpvf(aTHX_ "constant(%s): %s%s%s",
5719 (type ? type: "undef"), why1, why2, why3);
5720 yyerror(SvPVX(msg));
5724 cvp = hv_fetch(table, key, strlen(key), FALSE);
5725 if (!cvp || !SvOK(*cvp)) {
5728 why3 = "} is not defined";
5731 sv_2mortal(sv); /* Parent created it permanently */
5734 pv = sv_2mortal(newSVpvn(s, len));
5736 typesv = sv_2mortal(newSVpv(type, 0));
5738 typesv = &PL_sv_undef;
5740 PUSHSTACKi(PERLSI_OVERLOAD);
5753 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
5757 /* Check the eval first */
5758 if (!PL_in_eval && SvTRUE(ERRSV)) {
5760 sv_catpv(ERRSV, "Propagated");
5761 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
5763 res = SvREFCNT_inc(sv);
5767 (void)SvREFCNT_inc(res);
5776 why1 = "Call to &{$^H{";
5778 why3 = "}} did not return a defined value";
5787 S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5789 register char *d = dest;
5790 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5793 Perl_croak(aTHX_ ident_too_long);
5794 if (isALNUM(*s)) /* UTF handled below */
5796 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
5801 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5805 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5806 char *t = s + UTF8SKIP(s);
5807 while (*t & 0x80 && is_utf8_mark((U8*)t))
5809 if (d + (t - s) > e)
5810 Perl_croak(aTHX_ ident_too_long);
5811 Copy(s, d, t - s, char);
5824 S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
5834 e = d + destlen - 3; /* two-character token, ending NUL */
5836 while (isDIGIT(*s)) {
5838 Perl_croak(aTHX_ ident_too_long);
5845 Perl_croak(aTHX_ ident_too_long);
5846 if (isALNUM(*s)) /* UTF handled below */
5848 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
5853 else if (*s == ':' && s[1] == ':') {
5857 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5858 char *t = s + UTF8SKIP(s);
5859 while (*t & 0x80 && is_utf8_mark((U8*)t))
5861 if (d + (t - s) > e)
5862 Perl_croak(aTHX_ ident_too_long);
5863 Copy(s, d, t - s, char);
5874 if (PL_lex_state != LEX_NORMAL)
5875 PL_lex_state = LEX_INTERPENDMAYBE;
5878 if (*s == '$' && s[1] &&
5879 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5892 if (*d == '^' && *s && isCONTROLVAR(*s)) {
5897 if (isSPACE(s[-1])) {
5900 if (!SPACE_OR_TAB(ch)) {
5906 if (isIDFIRST_lazy_if(d,UTF)) {
5910 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
5912 while (e < send && *e & 0x80 && is_utf8_mark((U8*)e))
5915 Copy(s, d, e - s, char);
5920 while ((isALNUM(*s) || *s == ':') && d < e)
5923 Perl_croak(aTHX_ ident_too_long);
5926 while (s < send && SPACE_OR_TAB(*s)) s++;
5927 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
5928 dTHR; /* only for ckWARN */
5929 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
5930 const char *brack = *s == '[' ? "[...]" : "{...}";
5931 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5932 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
5933 funny, dest, brack, funny, dest, brack);
5936 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
5940 /* Handle extended ${^Foo} variables
5941 * 1999-02-27 mjd-perl-patch@plover.com */
5942 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
5946 while (isALNUM(*s) && d < e) {
5950 Perl_croak(aTHX_ ident_too_long);
5955 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
5956 PL_lex_state = LEX_INTERPEND;
5959 if (PL_lex_state == LEX_NORMAL) {
5960 dTHR; /* only for ckWARN */
5961 if (ckWARN(WARN_AMBIGUOUS) &&
5962 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
5964 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5965 "Ambiguous use of %c{%s} resolved to %c%s",
5966 funny, dest, funny, dest);
5971 s = bracket; /* let the parser handle it */
5975 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
5976 PL_lex_state = LEX_INTERPEND;
5981 Perl_pmflag(pTHX_ U16 *pmfl, int ch)
5986 *pmfl |= PMf_GLOBAL;
5988 *pmfl |= PMf_CONTINUE;
5992 *pmfl |= PMf_MULTILINE;
5994 *pmfl |= PMf_SINGLELINE;
5996 *pmfl |= PMf_EXTENDED;
6000 S_scan_pat(pTHX_ char *start, I32 type)
6005 s = scan_str(start,FALSE,FALSE);
6008 SvREFCNT_dec(PL_lex_stuff);
6009 PL_lex_stuff = Nullsv;
6010 Perl_croak(aTHX_ "Search pattern not terminated");
6013 pm = (PMOP*)newPMOP(type, 0);
6014 if (PL_multi_open == '?')
6015 pm->op_pmflags |= PMf_ONCE;
6017 while (*s && strchr("iomsx", *s))
6018 pmflag(&pm->op_pmflags,*s++);
6021 while (*s && strchr("iogcmsx", *s))
6022 pmflag(&pm->op_pmflags,*s++);
6024 pm->op_pmpermflags = pm->op_pmflags;
6026 PL_lex_op = (OP*)pm;
6027 yylval.ival = OP_MATCH;
6032 S_scan_subst(pTHX_ char *start)
6039 yylval.ival = OP_NULL;
6041 s = scan_str(start,FALSE,FALSE);
6045 SvREFCNT_dec(PL_lex_stuff);
6046 PL_lex_stuff = Nullsv;
6047 Perl_croak(aTHX_ "Substitution pattern not terminated");
6050 if (s[-1] == PL_multi_open)
6053 first_start = PL_multi_start;
6054 s = scan_str(s,FALSE,FALSE);
6057 SvREFCNT_dec(PL_lex_stuff);
6058 PL_lex_stuff = Nullsv;
6060 SvREFCNT_dec(PL_lex_repl);
6061 PL_lex_repl = Nullsv;
6062 Perl_croak(aTHX_ "Substitution replacement not terminated");
6064 PL_multi_start = first_start; /* so whole substitution is taken together */
6066 pm = (PMOP*)newPMOP(OP_SUBST, 0);
6072 else if (strchr("iogcmsx", *s))
6073 pmflag(&pm->op_pmflags,*s++);
6080 PL_sublex_info.super_bufptr = s;
6081 PL_sublex_info.super_bufend = PL_bufend;
6083 pm->op_pmflags |= PMf_EVAL;
6084 repl = newSVpvn("",0);
6086 sv_catpv(repl, es ? "eval " : "do ");
6087 sv_catpvn(repl, "{ ", 2);
6088 sv_catsv(repl, PL_lex_repl);
6089 sv_catpvn(repl, " };", 2);
6091 SvREFCNT_dec(PL_lex_repl);
6095 pm->op_pmpermflags = pm->op_pmflags;
6096 PL_lex_op = (OP*)pm;
6097 yylval.ival = OP_SUBST;
6102 S_scan_trans(pTHX_ char *start)
6113 yylval.ival = OP_NULL;
6115 s = scan_str(start,FALSE,FALSE);
6118 SvREFCNT_dec(PL_lex_stuff);
6119 PL_lex_stuff = Nullsv;
6120 Perl_croak(aTHX_ "Transliteration pattern not terminated");
6122 if (s[-1] == PL_multi_open)
6125 s = scan_str(s,FALSE,FALSE);
6128 SvREFCNT_dec(PL_lex_stuff);
6129 PL_lex_stuff = Nullsv;
6131 SvREFCNT_dec(PL_lex_repl);
6132 PL_lex_repl = Nullsv;
6133 Perl_croak(aTHX_ "Transliteration replacement not terminated");
6136 New(803,tbl,256,short);
6137 o = newPVOP(OP_TRANS, 0, (char*)tbl);
6139 complement = del = squash = 0;
6140 while (strchr("cds", *s)) {
6142 complement = OPpTRANS_COMPLEMENT;
6144 del = OPpTRANS_DELETE;
6146 squash = OPpTRANS_SQUASH;
6149 o->op_private = del|squash|complement;
6152 yylval.ival = OP_TRANS;
6157 S_scan_heredoc(pTHX_ register char *s)
6161 I32 op_type = OP_SCALAR;
6168 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
6172 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
6175 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
6176 if (*peek && strchr("`'\"",*peek)) {
6179 s = delimcpy(d, e, s, PL_bufend, term, &len);
6189 if (!isALNUM_lazy_if(s,UTF))
6190 deprecate("bare << to mean <<\"\"");
6191 for (; isALNUM_lazy_if(s,UTF); s++) {
6196 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
6197 Perl_croak(aTHX_ "Delimiter for here document is too long");
6200 len = d - PL_tokenbuf;
6201 #ifndef PERL_STRICT_CR
6202 d = strchr(s, '\r');
6206 while (s < PL_bufend) {
6212 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6221 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6226 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
6227 herewas = newSVpvn(s,PL_bufend-s);
6229 s--, herewas = newSVpvn(s,d-s);
6230 s += SvCUR(herewas);
6232 tmpstr = NEWSV(87,79);
6233 sv_upgrade(tmpstr, SVt_PVIV);
6238 else if (term == '`') {
6239 op_type = OP_BACKTICK;
6240 SvIVX(tmpstr) = '\\';
6244 PL_multi_start = CopLINE(PL_curcop);
6245 PL_multi_open = PL_multi_close = '<';
6246 term = *PL_tokenbuf;
6247 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6248 char *bufptr = PL_sublex_info.super_bufptr;
6249 char *bufend = PL_sublex_info.super_bufend;
6250 char *olds = s - SvCUR(herewas);
6251 s = strchr(bufptr, '\n');
6255 while (s < bufend &&
6256 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6258 CopLINE_inc(PL_curcop);
6261 CopLINE_set(PL_curcop, PL_multi_start);
6262 missingterm(PL_tokenbuf);
6264 sv_setpvn(herewas,bufptr,d-bufptr+1);
6265 sv_setpvn(tmpstr,d+1,s-d);
6267 sv_catpvn(herewas,s,bufend-s);
6268 (void)strcpy(bufptr,SvPVX(herewas));
6275 while (s < PL_bufend &&
6276 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6278 CopLINE_inc(PL_curcop);
6280 if (s >= PL_bufend) {
6281 CopLINE_set(PL_curcop, PL_multi_start);
6282 missingterm(PL_tokenbuf);
6284 sv_setpvn(tmpstr,d+1,s-d);
6286 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
6288 sv_catpvn(herewas,s,PL_bufend-s);
6289 sv_setsv(PL_linestr,herewas);
6290 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6291 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6294 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
6295 while (s >= PL_bufend) { /* multiple line string? */
6297 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6298 CopLINE_set(PL_curcop, PL_multi_start);
6299 missingterm(PL_tokenbuf);
6301 CopLINE_inc(PL_curcop);
6302 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6303 #ifndef PERL_STRICT_CR
6304 if (PL_bufend - PL_linestart >= 2) {
6305 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6306 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
6308 PL_bufend[-2] = '\n';
6310 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
6312 else if (PL_bufend[-1] == '\r')
6313 PL_bufend[-1] = '\n';
6315 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6316 PL_bufend[-1] = '\n';
6318 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6319 SV *sv = NEWSV(88,0);
6321 sv_upgrade(sv, SVt_PVMG);
6322 sv_setsv(sv,PL_linestr);
6323 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
6325 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6328 sv_catsv(PL_linestr,herewas);
6329 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6333 sv_catsv(tmpstr,PL_linestr);
6338 PL_multi_end = CopLINE(PL_curcop);
6339 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6340 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
6341 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
6343 SvREFCNT_dec(herewas);
6344 PL_lex_stuff = tmpstr;
6345 yylval.ival = op_type;
6350 takes: current position in input buffer
6351 returns: new position in input buffer
6352 side-effects: yylval and lex_op are set.
6357 <FH> read from filehandle
6358 <pkg::FH> read from package qualified filehandle
6359 <pkg'FH> read from package qualified filehandle
6360 <$fh> read from filehandle in $fh
6366 S_scan_inputsymbol(pTHX_ char *start)
6368 register char *s = start; /* current position in buffer */
6374 d = PL_tokenbuf; /* start of temp holding space */
6375 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
6376 end = strchr(s, '\n');
6379 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
6381 /* die if we didn't have space for the contents of the <>,
6382 or if it didn't end, or if we see a newline
6385 if (len >= sizeof PL_tokenbuf)
6386 Perl_croak(aTHX_ "Excessively long <> operator");
6388 Perl_croak(aTHX_ "Unterminated <> operator");
6393 Remember, only scalar variables are interpreted as filehandles by
6394 this code. Anything more complex (e.g., <$fh{$num}>) will be
6395 treated as a glob() call.
6396 This code makes use of the fact that except for the $ at the front,
6397 a scalar variable and a filehandle look the same.
6399 if (*d == '$' && d[1]) d++;
6401 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
6402 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
6405 /* If we've tried to read what we allow filehandles to look like, and
6406 there's still text left, then it must be a glob() and not a getline.
6407 Use scan_str to pull out the stuff between the <> and treat it
6408 as nothing more than a string.
6411 if (d - PL_tokenbuf != len) {
6412 yylval.ival = OP_GLOB;
6414 s = scan_str(start,FALSE,FALSE);
6416 Perl_croak(aTHX_ "Glob not terminated");
6420 /* we're in a filehandle read situation */
6423 /* turn <> into <ARGV> */
6425 (void)strcpy(d,"ARGV");
6427 /* if <$fh>, create the ops to turn the variable into a
6433 /* try to find it in the pad for this block, otherwise find
6434 add symbol table ops
6436 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
6437 OP *o = newOP(OP_PADSV, 0);
6439 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6442 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
6443 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
6444 newUNOP(OP_RV2SV, 0,
6445 newGVOP(OP_GV, 0, gv)));
6447 PL_lex_op->op_flags |= OPf_SPECIAL;
6448 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
6449 yylval.ival = OP_NULL;
6452 /* If it's none of the above, it must be a literal filehandle
6453 (<Foo::BAR> or <FOO>) so build a simple readline OP */
6455 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
6456 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
6457 yylval.ival = OP_NULL;
6466 takes: start position in buffer
6467 keep_quoted preserve \ on the embedded delimiter(s)
6468 keep_delims preserve the delimiters around the string
6469 returns: position to continue reading from buffer
6470 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6471 updates the read buffer.
6473 This subroutine pulls a string out of the input. It is called for:
6474 q single quotes q(literal text)
6475 ' single quotes 'literal text'
6476 qq double quotes qq(interpolate $here please)
6477 " double quotes "interpolate $here please"
6478 qx backticks qx(/bin/ls -l)
6479 ` backticks `/bin/ls -l`
6480 qw quote words @EXPORT_OK = qw( func() $spam )
6481 m// regexp match m/this/
6482 s/// regexp substitute s/this/that/
6483 tr/// string transliterate tr/this/that/
6484 y/// string transliterate y/this/that/
6485 ($*@) sub prototypes sub foo ($)
6486 (stuff) sub attr parameters sub foo : attr(stuff)
6487 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6489 In most of these cases (all but <>, patterns and transliterate)
6490 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6491 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6492 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6495 It skips whitespace before the string starts, and treats the first
6496 character as the delimiter. If the delimiter is one of ([{< then
6497 the corresponding "close" character )]}> is used as the closing
6498 delimiter. It allows quoting of delimiters, and if the string has
6499 balanced delimiters ([{<>}]) it allows nesting.
6501 The lexer always reads these strings into lex_stuff, except in the
6502 case of the operators which take *two* arguments (s/// and tr///)
6503 when it checks to see if lex_stuff is full (presumably with the 1st
6504 arg to s or tr) and if so puts the string into lex_repl.
6509 S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
6512 SV *sv; /* scalar value: string */
6513 char *tmps; /* temp string, used for delimiter matching */
6514 register char *s = start; /* current position in the buffer */
6515 register char term; /* terminating character */
6516 register char *to; /* current position in the sv's data */
6517 I32 brackets = 1; /* bracket nesting level */
6518 bool has_utf = FALSE; /* is there any utf8 content? */
6520 /* skip space before the delimiter */
6524 /* mark where we are, in case we need to report errors */
6527 /* after skipping whitespace, the next character is the terminator */
6529 if ((term & 0x80) && UTF)
6532 /* mark where we are */
6533 PL_multi_start = CopLINE(PL_curcop);
6534 PL_multi_open = term;
6536 /* find corresponding closing delimiter */
6537 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
6539 PL_multi_close = term;
6541 /* create a new SV to hold the contents. 87 is leak category, I'm
6542 assuming. 79 is the SV's initial length. What a random number. */
6544 sv_upgrade(sv, SVt_PVIV);
6546 (void)SvPOK_only(sv); /* validate pointer */
6548 /* move past delimiter and try to read a complete string */
6550 sv_catpvn(sv, s, 1);
6553 /* extend sv if need be */
6554 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
6555 /* set 'to' to the next character in the sv's string */
6556 to = SvPVX(sv)+SvCUR(sv);
6558 /* if open delimiter is the close delimiter read unbridle */
6559 if (PL_multi_open == PL_multi_close) {
6560 for (; s < PL_bufend; s++,to++) {
6561 /* embedded newlines increment the current line number */
6562 if (*s == '\n' && !PL_rsfp)
6563 CopLINE_inc(PL_curcop);
6564 /* handle quoted delimiters */
6565 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
6566 if (!keep_quoted && s[1] == term)
6568 /* any other quotes are simply copied straight through */
6572 /* terminate when run out of buffer (the for() condition), or
6573 have found the terminator */
6574 else if (*s == term)
6576 else if (!has_utf && (*s & 0x80) && UTF)
6582 /* if the terminator isn't the same as the start character (e.g.,
6583 matched brackets), we have to allow more in the quoting, and
6584 be prepared for nested brackets.
6587 /* read until we run out of string, or we find the terminator */
6588 for (; s < PL_bufend; s++,to++) {
6589 /* embedded newlines increment the line count */
6590 if (*s == '\n' && !PL_rsfp)
6591 CopLINE_inc(PL_curcop);
6592 /* backslashes can escape the open or closing characters */
6593 if (*s == '\\' && s+1 < PL_bufend) {
6595 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
6600 /* allow nested opens and closes */
6601 else if (*s == PL_multi_close && --brackets <= 0)
6603 else if (*s == PL_multi_open)
6605 else if (!has_utf && (*s & 0x80) && UTF)
6610 /* terminate the copied string and update the sv's end-of-string */
6612 SvCUR_set(sv, to - SvPVX(sv));
6615 * this next chunk reads more into the buffer if we're not done yet
6619 break; /* handle case where we are done yet :-) */
6621 #ifndef PERL_STRICT_CR
6622 if (to - SvPVX(sv) >= 2) {
6623 if ((to[-2] == '\r' && to[-1] == '\n') ||
6624 (to[-2] == '\n' && to[-1] == '\r'))
6628 SvCUR_set(sv, to - SvPVX(sv));
6630 else if (to[-1] == '\r')
6633 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6637 /* if we're out of file, or a read fails, bail and reset the current
6638 line marker so we can report where the unterminated string began
6641 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
6643 CopLINE_set(PL_curcop, PL_multi_start);
6646 /* we read a line, so increment our line counter */
6647 CopLINE_inc(PL_curcop);
6649 /* update debugger info */
6650 if (PERLDB_LINE && PL_curstash != PL_debstash) {
6651 SV *sv = NEWSV(88,0);
6653 sv_upgrade(sv, SVt_PVMG);
6654 sv_setsv(sv,PL_linestr);
6655 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
6658 /* having changed the buffer, we must update PL_bufend */
6659 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6662 /* at this point, we have successfully read the delimited string */
6665 sv_catpvn(sv, s, 1);
6668 PL_multi_end = CopLINE(PL_curcop);
6671 /* if we allocated too much space, give some back */
6672 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6673 SvLEN_set(sv, SvCUR(sv) + 1);
6674 Renew(SvPVX(sv), SvLEN(sv), char);
6677 /* decide whether this is the first or second quoted string we've read
6690 takes: pointer to position in buffer
6691 returns: pointer to new position in buffer
6692 side-effects: builds ops for the constant in yylval.op
6694 Read a number in any of the formats that Perl accepts:
6696 0(x[0-7A-F]+)|([0-7]+)|(b[01])
6697 [\d_]+(\.[\d_]*)?[Ee](\d+)
6699 Underbars (_) are allowed in decimal numbers. If -w is on,
6700 underbars before a decimal point must be at three digit intervals.
6702 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
6705 If it reads a number without a decimal point or an exponent, it will
6706 try converting the number to an integer and see if it can do so
6707 without loss of precision.
6711 Perl_scan_num(pTHX_ char *start)
6713 register char *s = start; /* current position in buffer */
6714 register char *d; /* destination in temp buffer */
6715 register char *e; /* end of temp buffer */
6716 NV nv; /* number read, as a double */
6717 SV *sv = Nullsv; /* place to put the converted number */
6718 bool floatit; /* boolean: int or float? */
6719 char *lastub = 0; /* position of last underbar */
6720 static char number_too_long[] = "Number too long";
6722 /* We use the first character to decide what type of number this is */
6726 Perl_croak(aTHX_ "panic: scan_num");
6728 /* if it starts with a 0, it could be an octal number, a decimal in
6729 0.13 disguise, or a hexadecimal number, or a binary number. */
6733 u holds the "number so far"
6734 shift the power of 2 of the base
6735 (hex == 4, octal == 3, binary == 1)
6736 overflowed was the number more than we can hold?
6738 Shift is used when we add a digit. It also serves as an "are
6739 we in octal/hex/binary?" indicator to disallow hex characters
6746 bool overflowed = FALSE;
6747 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6748 static char* bases[5] = { "", "binary", "", "octal",
6750 static char* Bases[5] = { "", "Binary", "", "Octal",
6752 static char *maxima[5] = { "",
6753 "0b11111111111111111111111111111111",
6757 char *base, *Base, *max;
6763 } else if (s[1] == 'b') {
6767 /* check for a decimal in disguise */
6768 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
6770 /* so it must be octal */
6774 base = bases[shift];
6775 Base = Bases[shift];
6776 max = maxima[shift];
6778 /* read the rest of the number */
6780 /* x is used in the overflow test,
6781 b is the digit we're adding on. */
6786 /* if we don't mention it, we're done */
6795 /* 8 and 9 are not octal */
6798 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
6802 case '2': case '3': case '4':
6803 case '5': case '6': case '7':
6805 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
6809 b = *s++ & 15; /* ASCII digit -> value of digit */
6813 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6814 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6815 /* make sure they said 0x */
6820 /* Prepare to put the digit we have onto the end
6821 of the number so far. We check for overflows.
6826 x = u << shift; /* make room for the digit */
6828 if ((x >> shift) != u
6829 && !(PL_hints & HINT_NEW_BINARY)) {
6833 if (ckWARN_d(WARN_OVERFLOW))
6834 Perl_warner(aTHX_ WARN_OVERFLOW,
6835 "Integer overflow in %s number",
6838 u = x | b; /* add the digit to the end */
6841 n *= nvshift[shift];
6842 /* If an NV has not enough bits in its
6843 * mantissa to represent an UV this summing of
6844 * small low-order numbers is a waste of time
6845 * (because the NV cannot preserve the
6846 * low-order bits anyway): we could just
6847 * remember when did we overflow and in the
6848 * end just multiply n by the right
6856 /* if we get here, we had success: make a scalar value from
6863 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
6864 Perl_warner(aTHX_ WARN_PORTABLE,
6865 "%s number > %s non-portable",
6872 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
6873 Perl_warner(aTHX_ WARN_PORTABLE,
6874 "%s number > %s non-portable",
6879 if (PL_hints & HINT_NEW_BINARY)
6880 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
6885 handle decimal numbers.
6886 we're also sent here when we read a 0 as the first digit
6888 case '1': case '2': case '3': case '4': case '5':
6889 case '6': case '7': case '8': case '9': case '.':
6892 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
6895 /* read next group of digits and _ and copy into d */
6896 while (isDIGIT(*s) || *s == '_') {
6897 /* skip underscores, checking for misplaced ones
6901 dTHR; /* only for ckWARN */
6902 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
6903 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6907 /* check for end of fixed-length buffer */
6909 Perl_croak(aTHX_ number_too_long);
6910 /* if we're ok, copy the character */
6915 /* final misplaced underbar check */
6916 if (lastub && s - lastub != 3) {
6918 if (ckWARN(WARN_SYNTAX))
6919 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
6922 /* read a decimal portion if there is one. avoid
6923 3..5 being interpreted as the number 3. followed
6926 if (*s == '.' && s[1] != '.') {
6930 /* copy, ignoring underbars, until we run out of
6931 digits. Note: no misplaced underbar checks!
6933 for (; isDIGIT(*s) || *s == '_'; s++) {
6934 /* fixed length buffer check */
6936 Perl_croak(aTHX_ number_too_long);
6940 if (*s == '.' && isDIGIT(s[1])) {
6941 /* oops, it's really a v-string, but without the "v" */
6947 /* read exponent part, if present */
6948 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
6952 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
6953 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
6955 /* allow positive or negative exponent */
6956 if (*s == '+' || *s == '-')
6959 /* read digits of exponent (no underbars :-) */
6960 while (isDIGIT(*s)) {
6962 Perl_croak(aTHX_ number_too_long);
6967 /* terminate the string */
6970 /* make an sv from the string */
6973 #if defined(Strtol) && defined(Strtoul)
6976 strtol/strtoll sets errno to ERANGE if the number is too big
6977 for an integer. We try to do an integer conversion first
6978 if no characters indicating "float" have been found.
6985 if (*PL_tokenbuf == '-')
6986 iv = Strtol(PL_tokenbuf, (char**)NULL, 10);
6988 uv = Strtoul(PL_tokenbuf, (char**)NULL, 10);
6990 floatit = TRUE; /* Probably just too large. */
6991 else if (*PL_tokenbuf == '-')
6993 else if (uv <= IV_MAX)
6994 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
6999 nv = Atof(PL_tokenbuf);
7004 No working strtou?ll?.
7006 Unfortunately atol() doesn't do range checks (returning
7007 LONG_MIN/LONG_MAX, and setting errno to ERANGE on overflows)
7008 everywhere [1], so we cannot use use atol() (or atoll()).
7009 If we could, they would be used, as Atol(), very much like
7010 Strtol() and Strtoul() are used above.
7012 [1] XXX Configure test needed to check for atol()
7013 (and atoll()) overflow behaviour XXX
7017 We need to do this the hard way. */
7019 nv = Atof(PL_tokenbuf);
7021 /* See if we can make do with an integer value without loss of
7022 precision. We use U_V to cast to a UV, because some
7023 compilers have issues. Then we try casting it back and see
7024 if it was the same [1]. We only do this if we know we
7025 specifically read an integer. If floatit is true, then we
7026 don't need to do the conversion at all.
7028 [1] Note that this is lossy if our NVs cannot preserve our
7029 UVs. There are metaconfig defines NV_PRESERVES_UV (a boolean)
7030 and NV_PRESERVES_UV_BITS (a number), but in general we really
7031 do hope all such potentially lossy platforms have strtou?ll?
7032 to do a lossless IV/UV conversion.
7034 Maybe could do some tricks with DBL_DIG, LDBL_DIG and
7035 DBL_MANT_DIG and LDBL_MANT_DIG (these are already available
7036 as NV_DIG and NV_MANT_DIG)?
7042 if (!floatit && (NV)uv == nv) {
7044 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
7052 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7053 (PL_hints & HINT_NEW_INTEGER) )
7054 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
7055 (floatit ? "float" : "integer"),
7059 /* if it starts with a v, it could be a v-string */
7065 while (isDIGIT(*pos) || *pos == '_')
7067 if (!isALPHA(*pos)) {
7069 U8 tmpbuf[UTF8_MAXLEN];
7072 s++; /* get past 'v' */
7075 sv_setpvn(sv, "", 0);
7078 if (*s == '0' && isDIGIT(s[1]))
7079 yyerror("Octal number in vector unsupported");
7082 /* this is atoi() that tolerates underscores */
7085 while (--end >= s) {
7090 rev += (*end - '0') * mult;
7092 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7093 Perl_warner(aTHX_ WARN_OVERFLOW,
7094 "Integer overflow in decimal number");
7097 tmpend = uv_to_utf8(tmpbuf, rev);
7098 utf8 = utf8 || rev > 127;
7099 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
7100 if (*pos == '.' && isDIGIT(pos[1]))
7106 while (isDIGIT(*pos) || *pos == '_')
7114 sv_utf8_downgrade(sv, TRUE);
7121 /* make the op for the constant and return */
7124 yylval.opval = newSVOP(OP_CONST, 0, sv);
7126 yylval.opval = Nullop;
7132 S_scan_formline(pTHX_ register char *s)
7137 SV *stuff = newSVpvn("",0);
7138 bool needargs = FALSE;
7141 if (*s == '.' || *s == /*{*/'}') {
7143 #ifdef PERL_STRICT_CR
7144 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
7146 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
7148 if (*t == '\n' || t == PL_bufend)
7151 if (PL_in_eval && !PL_rsfp) {
7152 eol = strchr(s,'\n');
7157 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7159 for (t = s; t < eol; t++) {
7160 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7162 goto enough; /* ~~ must be first line in formline */
7164 if (*t == '@' || *t == '^')
7167 sv_catpvn(stuff, s, eol-s);
7168 #ifndef PERL_STRICT_CR
7169 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7170 char *end = SvPVX(stuff) + SvCUR(stuff);
7179 s = filter_gets(PL_linestr, PL_rsfp, 0);
7180 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7181 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
7184 yyerror("Format not terminated");
7194 PL_lex_state = LEX_NORMAL;
7195 PL_nextval[PL_nexttoke].ival = 0;
7199 PL_lex_state = LEX_FORMLINE;
7200 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
7202 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
7206 SvREFCNT_dec(stuff);
7207 PL_lex_formbrack = 0;
7218 PL_cshlen = strlen(PL_cshname);
7223 Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
7226 I32 oldsavestack_ix = PL_savestack_ix;
7227 CV* outsidecv = PL_compcv;
7231 assert(SvTYPE(PL_compcv) == SVt_PVCV);
7233 SAVEI32(PL_subline);
7234 save_item(PL_subname);
7237 SAVESPTR(PL_comppad_name);
7238 SAVESPTR(PL_compcv);
7239 SAVEI32(PL_comppad_name_fill);
7240 SAVEI32(PL_min_intro_pending);
7241 SAVEI32(PL_max_intro_pending);
7242 SAVEI32(PL_pad_reset_pending);
7244 PL_compcv = (CV*)NEWSV(1104,0);
7245 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7246 CvFLAGS(PL_compcv) |= flags;
7248 PL_comppad = newAV();
7249 av_push(PL_comppad, Nullsv);
7250 PL_curpad = AvARRAY(PL_comppad);
7251 PL_comppad_name = newAV();
7252 PL_comppad_name_fill = 0;
7253 PL_min_intro_pending = 0;
7255 PL_subline = CopLINE(PL_curcop);
7257 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
7258 PL_curpad[0] = (SV*)newAV();
7259 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
7260 #endif /* USE_THREADS */
7262 comppadlist = newAV();
7263 AvREAL_off(comppadlist);
7264 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7265 av_store(comppadlist, 1, (SV*)PL_comppad);
7267 CvPADLIST(PL_compcv) = comppadlist;
7268 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
7270 CvOWNER(PL_compcv) = 0;
7271 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7272 MUTEX_INIT(CvMUTEXP(PL_compcv));
7273 #endif /* USE_THREADS */
7275 return oldsavestack_ix;
7279 Perl_yywarn(pTHX_ char *s)
7282 PL_in_eval |= EVAL_WARNONLY;
7284 PL_in_eval &= ~EVAL_WARNONLY;
7289 Perl_yyerror(pTHX_ char *s)
7293 char *context = NULL;
7297 if (!yychar || (yychar == ';' && !PL_rsfp))
7299 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7300 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7301 while (isSPACE(*PL_oldoldbufptr))
7303 context = PL_oldoldbufptr;
7304 contlen = PL_bufptr - PL_oldoldbufptr;
7306 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7307 PL_oldbufptr != PL_bufptr) {
7308 while (isSPACE(*PL_oldbufptr))
7310 context = PL_oldbufptr;
7311 contlen = PL_bufptr - PL_oldbufptr;
7313 else if (yychar > 255)
7314 where = "next token ???";
7315 #ifdef USE_PURE_BISON
7316 /* GNU Bison sets the value -2 */
7317 else if (yychar == -2) {
7319 else if ((yychar & 127) == 127) {
7321 if (PL_lex_state == LEX_NORMAL ||
7322 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
7323 where = "at end of line";
7324 else if (PL_lex_inpat)
7325 where = "within pattern";
7327 where = "within string";
7330 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
7332 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
7333 else if (isPRINT_LC(yychar))
7334 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
7336 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
7337 where = SvPVX(where_sv);
7339 msg = sv_2mortal(newSVpv(s, 0));
7340 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7341 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
7343 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
7345 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
7346 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
7347 Perl_sv_catpvf(aTHX_ msg,
7348 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
7349 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
7352 if (PL_in_eval & EVAL_WARNONLY)
7353 Perl_warn(aTHX_ "%"SVf, msg);
7356 if (PL_error_count >= 10) {
7357 if (PL_in_eval && SvCUR(ERRSV))
7358 Perl_croak(aTHX_ "%_%s has too many errors.\n",
7359 ERRSV, CopFILE(PL_curcop));
7361 Perl_croak(aTHX_ "%s has too many errors.\n",
7362 CopFILE(PL_curcop));
7365 PL_in_my_stash = Nullhv;
7370 S_swallow_bom(pTHX_ U8 *s)
7373 slen = SvCUR(PL_linestr);
7377 /* UTF-16 little-endian */
7378 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
7379 Perl_croak(aTHX_ "Unsupported script encoding");
7380 #ifndef PERL_NO_UTF16_FILTER
7381 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
7383 if (PL_bufend > (char*)s) {
7387 filter_add(utf16rev_textfilter, NULL);
7388 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7389 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7390 PL_bufend - (char*)s - 1,
7392 Copy(news, s, newlen, U8);
7393 SvCUR_set(PL_linestr, newlen);
7394 PL_bufend = SvPVX(PL_linestr) + newlen;
7395 news[newlen++] = '\0';
7399 Perl_croak(aTHX_ "Unsupported script encoding");
7404 if (s[1] == 0xFF) { /* UTF-16 big-endian */
7405 #ifndef PERL_NO_UTF16_FILTER
7406 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7408 if (PL_bufend > (char *)s) {
7412 filter_add(utf16_textfilter, NULL);
7413 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7414 PL_bufend = (char*)utf16_to_utf8(s, news,
7415 PL_bufend - (char*)s,
7417 Copy(news, s, newlen, U8);
7418 SvCUR_set(PL_linestr, newlen);
7419 PL_bufend = SvPVX(PL_linestr) + newlen;
7420 news[newlen++] = '\0';
7424 Perl_croak(aTHX_ "Unsupported script encoding");
7429 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
7430 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
7435 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
7436 s[2] == 0xFE && s[3] == 0xFF)
7438 Perl_croak(aTHX_ "Unsupported script encoding");
7450 * Restore a source filter.
7454 restore_rsfp(pTHXo_ void *f)
7456 PerlIO *fp = (PerlIO*)f;
7458 if (PL_rsfp == PerlIO_stdin())
7459 PerlIO_clearerr(PL_rsfp);
7460 else if (PL_rsfp && (PL_rsfp != fp))
7461 PerlIO_close(PL_rsfp);
7465 #ifndef PERL_NO_UTF16_FILTER
7467 utf16_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7469 I32 count = FILTER_READ(idx+1, sv, maxlen);
7474 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7475 if (!*SvPV_nolen(sv))
7476 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7479 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7480 sv_usepvn(sv, (char*)tmps, tend - tmps);
7486 utf16rev_textfilter(pTHXo_ int idx, SV *sv, int maxlen)
7488 I32 count = FILTER_READ(idx+1, sv, maxlen);
7493 if (!*SvPV_nolen(sv))
7494 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7497 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
7498 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
7499 sv_usepvn(sv, (char*)tmps, tend - tmps);