3 * Copyright (c) 1991-1999, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
17 #define yychar PL_yychar
18 #define yylval PL_yylval
21 static void check_uni _((void));
22 static void force_next _((I32 type));
23 static char *force_version _((char *start));
24 static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
25 static SV *tokeq _((SV *sv));
26 static char *scan_const _((char *start));
27 static char *scan_formline _((char *s));
28 static char *scan_heredoc _((char *s));
29 static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
31 static char *scan_inputsymbol _((char *start));
32 static char *scan_pat _((char *start, I32 type));
33 static char *scan_str _((char *start));
34 static char *scan_subst _((char *start));
35 static char *scan_trans _((char *start));
36 static char *scan_word _((char *s, char *dest, STRLEN destlen,
37 int allow_package, STRLEN *slp));
38 static char *skipspace _((char *s));
39 static void checkcomma _((char *s, char *name, char *what));
40 static void force_ident _((char *s, int kind));
41 static void incline _((char *s));
42 static int intuit_method _((char *s, GV *gv));
43 static int intuit_more _((char *s));
44 static I32 lop _((I32 f, expectation x, char *s));
45 static void missingterm _((char *s));
46 static void no_op _((char *what, char *s));
47 static void set_csh _((void));
48 static I32 sublex_done _((void));
49 static I32 sublex_push _((void));
50 static I32 sublex_start _((void));
52 static int uni _((I32 f, char *s));
54 static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
55 static void restore_rsfp _((void *f));
56 static SV *new_constant _((char *s, STRLEN len, char *key, SV *sv, SV *pv, char *type));
57 static void restore_expect _((void *e));
58 static void restore_lex_expect _((void *e));
59 #endif /* PERL_OBJECT */
61 static char ident_too_long[] = "Identifier too long";
63 #define UTF (PL_hints & HINT_UTF8)
65 * Note: we try to be careful never to call the isXXX_utf8() functions
66 * unless we're pretty sure we've seen the beginning of a UTF-8 character
67 * (that is, the two high bits are set). Otherwise we risk loading in the
68 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
70 #define isIDFIRST_lazy(p) ((!UTF || (*((U8*)p) < 0xc0)) \
72 : isIDFIRST_utf8((U8*)p))
73 #define isALNUM_lazy(p) ((!UTF || (*((U8*)p) < 0xc0)) \
75 : isALNUM_utf8((U8*)p))
77 /* In variables name $^X, these are the legal values for X.
78 * 1999-02-27 mjd-perl-patch@plover.com */
79 #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
81 /* The following are arranged oddly so that the guard on the switch statement
82 * can get by with a single comparison (if the compiler is smart enough).
85 /* #define LEX_NOTPARSING 11 is done in perl.h. */
88 #define LEX_INTERPNORMAL 9
89 #define LEX_INTERPCASEMOD 8
90 #define LEX_INTERPPUSH 7
91 #define LEX_INTERPSTART 6
92 #define LEX_INTERPEND 5
93 #define LEX_INTERPENDMAYBE 4
94 #define LEX_INTERPCONCAT 3
95 #define LEX_INTERPCONST 2
96 #define LEX_FORMLINE 1
97 #define LEX_KNOWNEXT 0
103 #include <sys/file.h>
106 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
108 # include <unistd.h> /* Needed for execv() */
116 #ifdef USE_PURE_BISON
117 YYSTYPE* yylval_pointer = NULL;
118 int* yychar_pointer = NULL;
121 # define yylval (*yylval_pointer)
122 # define yychar (*yychar_pointer)
123 # define PERL_YYLEX_PARAM yylval_pointer,yychar_pointer
125 # define PERL_YYLEX_PARAM
128 #include "keywords.h"
133 #define CLINE (PL_copline = (PL_curcop->cop_line < PL_copline ? PL_curcop->cop_line : PL_copline))
135 #define TOKEN(retval) return (PL_bufptr = s,(int)retval)
136 #define OPERATOR(retval) return (PL_expect = XTERM,PL_bufptr = s,(int)retval)
137 #define AOPERATOR(retval) return ao((PL_expect = XTERM,PL_bufptr = s,(int)retval))
138 #define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
139 #define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
140 #define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s,(int)retval)
141 #define TERM(retval) return (CLINE, PL_expect = XOPERATOR,PL_bufptr = s,(int)retval)
142 #define LOOPX(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
143 #define FTST(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
144 #define FUN0(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
145 #define FUN1(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
146 #define BOop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
147 #define BAop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
148 #define SHop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
149 #define PWop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
150 #define PMop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
151 #define Aop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
152 #define Mop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
153 #define Eop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
154 #define Rop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
156 /* This bit of chicanery makes a unary function followed by
157 * a parenthesis into a function with one argument, highest precedence.
159 #define UNI(f) return(yylval.ival = f, \
162 PL_last_uni = PL_oldbufptr, \
163 PL_last_lop_op = f, \
164 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
166 #define UNIBRACK(f) return(yylval.ival = f, \
168 PL_last_uni = PL_oldbufptr, \
169 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
171 /* grandfather return to old style */
172 #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
177 if (*PL_bufptr == '=') {
179 if (toketype == ANDAND)
180 yylval.ival = OP_ANDASSIGN;
181 else if (toketype == OROR)
182 yylval.ival = OP_ORASSIGN;
189 no_op(char *what, char *s)
191 char *oldbp = PL_bufptr;
192 bool is_first = (PL_oldbufptr == PL_linestart);
195 yywarn(form("%s found where operator expected", what));
197 warn("\t(Missing semicolon on previous line?)\n");
198 else if (PL_oldoldbufptr && isIDFIRST_lazy(PL_oldoldbufptr)) {
200 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy(t) || *t == ':'); t++) ;
201 if (t < PL_bufptr && isSPACE(*t))
202 warn("\t(Do you need to predeclare %.*s?)\n",
203 t - PL_oldoldbufptr, PL_oldoldbufptr);
207 warn("\t(Missing operator before end of line?)\n");
209 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
219 char *nl = strrchr(s,'\n');
225 iscntrl(PL_multi_close)
227 PL_multi_close < 32 || PL_multi_close == 127
231 tmpbuf[1] = toCTRL(PL_multi_close);
237 *tmpbuf = PL_multi_close;
241 q = strchr(s,'"') ? '\'' : '"';
242 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
249 if (ckWARN(WARN_DEPRECATED))
250 warner(WARN_DEPRECATED, "Use of %s is deprecated", s);
256 deprecate("comma-less variable list");
262 win32_textfilter(int idx, SV *sv, int maxlen)
264 I32 count = FILTER_READ(idx+1, sv, maxlen);
265 if (count > 0 && !maxlen)
266 win32_strip_return(sv);
274 utf16_textfilter(int idx, SV *sv, int maxlen)
276 I32 count = FILTER_READ(idx+1, sv, maxlen);
280 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
281 tend = utf16_to_utf8((U16*)SvPVX(sv), tmps, SvCUR(sv));
282 sv_usepvn(sv, (char*)tmps, tend - tmps);
289 utf16rev_textfilter(int idx, SV *sv, int maxlen)
291 I32 count = FILTER_READ(idx+1, sv, maxlen);
295 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
296 tend = utf16_to_utf8_reversed((U16*)SvPVX(sv), tmps, SvCUR(sv));
297 sv_usepvn(sv, (char*)tmps, tend - tmps);
312 SAVEI32(PL_lex_dojoin);
313 SAVEI32(PL_lex_brackets);
314 SAVEI32(PL_lex_fakebrack);
315 SAVEI32(PL_lex_casemods);
316 SAVEI32(PL_lex_starts);
317 SAVEI32(PL_lex_state);
318 SAVESPTR(PL_lex_inpat);
319 SAVEI32(PL_lex_inwhat);
320 SAVEI16(PL_curcop->cop_line);
323 SAVEPPTR(PL_oldbufptr);
324 SAVEPPTR(PL_oldoldbufptr);
325 SAVEPPTR(PL_linestart);
326 SAVESPTR(PL_linestr);
327 SAVEPPTR(PL_lex_brackstack);
328 SAVEPPTR(PL_lex_casestack);
329 SAVEDESTRUCTOR(restore_rsfp, PL_rsfp);
330 SAVESPTR(PL_lex_stuff);
331 SAVEI32(PL_lex_defer);
332 SAVESPTR(PL_lex_repl);
333 SAVEDESTRUCTOR(restore_expect, PL_tokenbuf + PL_expect); /* encode as pointer */
334 SAVEDESTRUCTOR(restore_lex_expect, PL_tokenbuf + PL_expect);
336 PL_lex_state = LEX_NORMAL;
340 PL_lex_fakebrack = 0;
341 New(899, PL_lex_brackstack, 120, char);
342 New(899, PL_lex_casestack, 12, char);
343 SAVEFREEPV(PL_lex_brackstack);
344 SAVEFREEPV(PL_lex_casestack);
346 *PL_lex_casestack = '\0';
349 PL_lex_stuff = Nullsv;
350 PL_lex_repl = Nullsv;
354 if (SvREADONLY(PL_linestr))
355 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
356 s = SvPV(PL_linestr, len);
357 if (len && s[len-1] != ';') {
358 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
359 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
360 sv_catpvn(PL_linestr, "\n;", 2);
362 SvTEMP_off(PL_linestr);
363 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
364 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
366 PL_rs = newSVpv("\n", 1);
373 PL_doextract = FALSE;
377 restore_rsfp(void *f)
379 PerlIO *fp = (PerlIO*)f;
381 if (PL_rsfp == PerlIO_stdin())
382 PerlIO_clearerr(PL_rsfp);
383 else if (PL_rsfp && (PL_rsfp != fp))
384 PerlIO_close(PL_rsfp);
389 restore_expect(void *e)
391 /* a safe way to store a small integer in a pointer */
392 PL_expect = (expectation)((char *)e - PL_tokenbuf);
396 restore_lex_expect(void *e)
398 /* a safe way to store a small integer in a pointer */
399 PL_lex_expect = (expectation)((char *)e - PL_tokenbuf);
411 PL_curcop->cop_line++;
414 while (*s == ' ' || *s == '\t') s++;
415 if (strnEQ(s, "line ", 5)) {
424 while (*s == ' ' || *s == '\t')
426 if (*s == '"' && (t = strchr(s+1, '"')))
430 return; /* false alarm */
431 for (t = s; !isSPACE(*t); t++) ;
436 PL_curcop->cop_filegv = gv_fetchfile(s);
438 PL_curcop->cop_filegv = gv_fetchfile(PL_origfilename);
440 PL_curcop->cop_line = atoi(n)-1;
444 skipspace(register char *s)
447 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
448 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
454 while (s < PL_bufend && isSPACE(*s)) {
455 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
458 if (s < PL_bufend && *s == '#') {
459 while (s < PL_bufend && *s != '\n')
463 if (PL_in_eval && !PL_rsfp) {
469 if (s < PL_bufend || !PL_rsfp || PL_lex_state != LEX_NORMAL)
471 if ((s = filter_gets(PL_linestr, PL_rsfp, (prevlen = SvCUR(PL_linestr)))) == Nullch) {
472 if (PL_minus_n || PL_minus_p) {
473 sv_setpv(PL_linestr,PL_minus_p ?
474 ";}continue{print or die qq(-p destination: $!\\n)" :
476 sv_catpv(PL_linestr,";}");
477 PL_minus_n = PL_minus_p = 0;
480 sv_setpv(PL_linestr,";");
481 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
482 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
483 if (PL_preprocess && !PL_in_eval)
484 (void)PerlProc_pclose(PL_rsfp);
485 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
486 PerlIO_clearerr(PL_rsfp);
488 (void)PerlIO_close(PL_rsfp);
492 PL_linestart = PL_bufptr = s + prevlen;
493 PL_bufend = s + SvCUR(PL_linestr);
496 if (PERLDB_LINE && PL_curstash != PL_debstash) {
497 SV *sv = NEWSV(85,0);
499 sv_upgrade(sv, SVt_PVMG);
500 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
501 av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
512 if (PL_oldoldbufptr != PL_last_uni)
514 while (isSPACE(*PL_last_uni))
516 for (s = PL_last_uni; isALNUM_lazy(s) || *s == '-'; s++) ;
517 if ((t = strchr(s, '(')) && t < PL_bufptr)
521 warn("Warning: Use of \"%s\" without parens is ambiguous", PL_last_uni);
528 #define UNI(f) return uni(f,s)
536 PL_last_uni = PL_oldbufptr;
547 #endif /* CRIPPLED_CC */
549 #define LOP(f,x) return lop(f,x,s)
552 lop(I32 f, expectation x, char *s)
559 PL_last_lop = PL_oldbufptr;
575 PL_nexttype[PL_nexttoke] = type;
577 if (PL_lex_state != LEX_KNOWNEXT) {
578 PL_lex_defer = PL_lex_state;
579 PL_lex_expect = PL_expect;
580 PL_lex_state = LEX_KNOWNEXT;
585 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
590 start = skipspace(start);
592 if (isIDFIRST_lazy(s) ||
593 (allow_pack && *s == ':') ||
594 (allow_initial_tick && *s == '\'') )
596 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
597 if (check_keyword && keyword(PL_tokenbuf, len))
599 if (token == METHOD) {
604 PL_expect = XOPERATOR;
607 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
608 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
615 force_ident(register char *s, int kind)
618 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
619 PL_nextval[PL_nexttoke].opval = o;
622 dTHR; /* just for in_eval */
623 o->op_private = OPpCONST_ENTERED;
624 /* XXX see note in pp_entereval() for why we forgo typo
625 warnings if the symbol must be introduced in an eval.
627 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
628 kind == '$' ? SVt_PV :
629 kind == '@' ? SVt_PVAV :
630 kind == '%' ? SVt_PVHV :
638 force_version(char *s)
640 OP *version = Nullop;
644 /* default VERSION number -- GBARR */
649 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
650 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
652 /* real VERSION number -- GBARR */
653 version = yylval.opval;
657 /* NOTE: The parser sees the package name and the VERSION swapped */
658 PL_nextval[PL_nexttoke].opval = version;
676 s = SvPV_force(sv, len);
680 while (s < send && *s != '\\')
685 if ( PL_hints & HINT_NEW_STRING )
686 pv = sv_2mortal(newSVpv(SvPVX(pv), len));
689 if (s + 1 < send && (s[1] == '\\'))
690 s++; /* all that, just for this */
695 SvCUR_set(sv, d - SvPVX(sv));
697 if ( PL_hints & HINT_NEW_STRING )
698 return new_constant(NULL, 0, "q", sv, pv, "q");
705 register I32 op_type = yylval.ival;
707 if (op_type == OP_NULL) {
708 yylval.opval = PL_lex_op;
712 if (op_type == OP_CONST || op_type == OP_READLINE) {
713 SV *sv = tokeq(PL_lex_stuff);
715 if (SvTYPE(sv) == SVt_PVIV) {
716 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
722 nsv = newSVpv(p, len);
726 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
727 PL_lex_stuff = Nullsv;
731 PL_sublex_info.super_state = PL_lex_state;
732 PL_sublex_info.sub_inwhat = op_type;
733 PL_sublex_info.sub_op = PL_lex_op;
734 PL_lex_state = LEX_INTERPPUSH;
738 yylval.opval = PL_lex_op;
752 PL_lex_state = PL_sublex_info.super_state;
753 SAVEI32(PL_lex_dojoin);
754 SAVEI32(PL_lex_brackets);
755 SAVEI32(PL_lex_fakebrack);
756 SAVEI32(PL_lex_casemods);
757 SAVEI32(PL_lex_starts);
758 SAVEI32(PL_lex_state);
759 SAVESPTR(PL_lex_inpat);
760 SAVEI32(PL_lex_inwhat);
761 SAVEI16(PL_curcop->cop_line);
763 SAVEPPTR(PL_oldbufptr);
764 SAVEPPTR(PL_oldoldbufptr);
765 SAVEPPTR(PL_linestart);
766 SAVESPTR(PL_linestr);
767 SAVEPPTR(PL_lex_brackstack);
768 SAVEPPTR(PL_lex_casestack);
770 PL_linestr = PL_lex_stuff;
771 PL_lex_stuff = Nullsv;
773 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
774 PL_bufend += SvCUR(PL_linestr);
775 SAVEFREESV(PL_linestr);
777 PL_lex_dojoin = FALSE;
779 PL_lex_fakebrack = 0;
780 New(899, PL_lex_brackstack, 120, char);
781 New(899, PL_lex_casestack, 12, char);
782 SAVEFREEPV(PL_lex_brackstack);
783 SAVEFREEPV(PL_lex_casestack);
785 *PL_lex_casestack = '\0';
787 PL_lex_state = LEX_INTERPCONCAT;
788 PL_curcop->cop_line = PL_multi_start;
790 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
791 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
792 PL_lex_inpat = PL_sublex_info.sub_op;
794 PL_lex_inpat = Nullop;
802 if (!PL_lex_starts++) {
803 PL_expect = XOPERATOR;
804 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
808 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
809 PL_lex_state = LEX_INTERPCASEMOD;
810 return yylex(PERL_YYLEX_PARAM);
813 /* Is there a right-hand side to take care of? */
814 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
815 PL_linestr = PL_lex_repl;
817 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
818 PL_bufend += SvCUR(PL_linestr);
819 SAVEFREESV(PL_linestr);
820 PL_lex_dojoin = FALSE;
822 PL_lex_fakebrack = 0;
824 *PL_lex_casestack = '\0';
826 if (SvCOMPILED(PL_lex_repl)) {
827 PL_lex_state = LEX_INTERPNORMAL;
829 /* we don't clear PL_lex_repl here, so that we can check later
830 whether this is an evalled subst; that means we rely on the
831 logic to ensure sublex_done() is called again only via the
832 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
835 PL_lex_state = LEX_INTERPCONCAT;
836 PL_lex_repl = Nullsv;
842 PL_bufend = SvPVX(PL_linestr);
843 PL_bufend += SvCUR(PL_linestr);
844 PL_expect = XOPERATOR;
852 Extracts a pattern, double-quoted string, or transliteration. This
855 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
856 processing a pattern (PL_lex_inpat is true), a transliteration
857 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
859 Returns a pointer to the character scanned up to. Iff this is
860 advanced from the start pointer supplied (ie if anything was
861 successfully parsed), will leave an OP for the substring scanned
862 in yylval. Caller must intuit reason for not parsing further
863 by looking at the next characters herself.
867 double-quoted style: \r and \n
868 regexp special ones: \D \s
870 backrefs: \1 (deprecated in substitution replacements)
871 case and quoting: \U \Q \E
872 stops on @ and $, but not for $ as tail anchor
875 characters are VERY literal, except for - not at the start or end
876 of the string, which indicates a range. scan_const expands the
877 range to the full set of intermediate characters.
879 In double-quoted strings:
881 double-quoted style: \r and \n
883 backrefs: \1 (deprecated)
884 case and quoting: \U \Q \E
887 scan_const does *not* construct ops to handle interpolated strings.
888 It stops processing as soon as it finds an embedded $ or @ variable
889 and leaves it to the caller to work out what's going on.
891 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
893 $ in pattern could be $foo or could be tail anchor. Assumption:
894 it's a tail anchor if $ is the last thing in the string, or if it's
895 followed by one of ")| \n\t"
897 \1 (backreferences) are turned into $1
899 The structure of the code is
900 while (there's a character to process) {
901 handle transliteration ranges
903 skip # initiated comments in //x patterns
904 check for embedded @foo
905 check for embedded scalars
907 leave intact backslashes from leave (below)
908 deprecate \1 in strings and sub replacements
909 handle string-changing backslashes \l \U \Q \E, etc.
910 switch (what was escaped) {
911 handle - in a transliteration (becomes a literal -)
912 handle \132 octal characters
913 handle 0x15 hex characters
914 handle \cV (control V)
915 handle printf backslashes (\f, \r, \n, etc)
918 } (end while character to read)
923 scan_const(char *start)
925 register char *send = PL_bufend; /* end of the constant */
926 SV *sv = NEWSV(93, send - start); /* sv for the constant */
927 register char *s = start; /* start of the constant */
928 register char *d = SvPVX(sv); /* destination for copies */
929 bool dorange = FALSE; /* are we in a translit range? */
931 I32 utf = PL_lex_inwhat == OP_TRANS
932 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
934 I32 thisutf = PL_lex_inwhat == OP_TRANS
935 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
938 /* leaveit is the set of acceptably-backslashed characters */
941 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
944 while (s < send || dorange) {
945 /* get transliterations out of the way (they're most literal) */
946 if (PL_lex_inwhat == OP_TRANS) {
947 /* expand a range A-Z to the full set of characters. AIE! */
949 I32 i; /* current expanded character */
950 I32 min; /* first character in range */
951 I32 max; /* last character in range */
953 i = d - SvPVX(sv); /* remember current offset */
954 SvGROW(sv, SvLEN(sv) + 256); /* expand the sv -- there'll never be more'n 256 chars in a range for it to grow by */
955 d = SvPVX(sv) + i; /* restore d after the grow potentially has changed the ptr */
956 d -= 2; /* eat the first char and the - */
958 min = (U8)*d; /* first char in range */
959 max = (U8)d[1]; /* last char in range */
962 if ((isLOWER(min) && isLOWER(max)) ||
963 (isUPPER(min) && isUPPER(max))) {
965 for (i = min; i <= max; i++)
969 for (i = min; i <= max; i++)
976 for (i = min; i <= max; i++)
979 /* mark the range as done, and continue */
984 /* range begins (ignore - as first or last char) */
985 else if (*s == '-' && s+1 < send && s != start) {
987 *d++ = (char)0xff; /* use illegal utf8 byte--see pmtrans */
996 /* if we get here, we're not doing a transliteration */
998 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
999 except for the last char, which will be done separately. */
1000 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
1002 while (s < send && *s != ')')
1004 } else if (s[2] == '{'
1005 || s[2] == 'p' && s[3] == '{') { /* This should march regcomp.c */
1007 char *regparse = s + (s[2] == '{' ? 3 : 4);
1010 while (count && (c = *regparse)) {
1011 if (c == '\\' && regparse[1])
1019 if (*regparse != ')') {
1020 regparse--; /* Leave one char for continuation. */
1021 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
1023 while (s < regparse)
1028 /* likewise skip #-initiated comments in //x patterns */
1029 else if (*s == '#' && PL_lex_inpat &&
1030 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
1031 while (s+1 < send && *s != '\n')
1035 /* check for embedded arrays (@foo, @:foo, @'foo, @{foo}, @$foo) */
1036 else if (*s == '@' && s[1] && (isALNUM_lazy(s+1) || strchr(":'{$", s[1])))
1039 /* check for embedded scalars. only stop if we're sure it's a
1042 else if (*s == '$') {
1043 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
1045 if (s + 1 < send && !strchr("()| \n\t", s[1]))
1046 break; /* in regexp, $ might be tail anchor */
1049 /* (now in tr/// code again) */
1051 if (*s & 0x80 && thisutf) {
1052 dTHR; /* only for ckWARN */
1053 if (ckWARN(WARN_UTF8)) {
1054 (void)utf8_to_uv((U8*)s, &len); /* could cvt latin-1 to utf8 here... */
1064 if (*s == '\\' && s+1 < send) {
1067 /* some backslashes we leave behind */
1068 if (*leaveit && *s && strchr(leaveit, *s)) {
1074 /* deprecate \1 in strings and substitution replacements */
1075 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
1076 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
1078 dTHR; /* only for ckWARN */
1079 if (ckWARN(WARN_SYNTAX))
1080 warner(WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
1085 /* string-change backslash escapes */
1086 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
1091 /* if we get here, it's either a quoted -, or a digit */
1094 /* quoted - in transliterations */
1096 if (PL_lex_inwhat == OP_TRANS) {
1104 if (ckWARN(WARN_UNSAFE) && isALPHA(*s))
1106 "Unrecognized escape \\%c passed through",
1108 /* default action is to copy the quoted character */
1113 /* \132 indicates an octal constant */
1114 case '0': case '1': case '2': case '3':
1115 case '4': case '5': case '6': case '7':
1116 *d++ = scan_oct(s, 3, &len);
1120 /* \x24 indicates a hex constant */
1124 char* e = strchr(s, '}');
1127 yyerror("Missing right brace on \\x{}");
1132 if (ckWARN(WARN_UTF8))
1134 "Use of \\x{} without utf8 declaration");
1136 /* note: utf always shorter than hex */
1137 d = (char*)uv_to_utf8((U8*)d,
1138 scan_hex(s + 1, e - s - 1, &len));
1143 UV uv = (UV)scan_hex(s, 2, &len);
1144 if (utf && PL_lex_inwhat == OP_TRANS &&
1145 utf != (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
1147 d = (char*)uv_to_utf8((U8*)d, uv); /* doing a CU or UC */
1150 if (uv >= 127 && UTF) {
1152 if (ckWARN(WARN_UTF8))
1154 "\\x%.*s will produce malformed UTF-8 character; use \\x{%.*s} for that",
1163 /* \c is a control character */
1177 /* printf-style backslashes, formfeeds, newlines, etc */
1203 } /* end if (backslash) */
1206 } /* while loop to process each character */
1208 /* terminate the string and set up the sv */
1210 SvCUR_set(sv, d - SvPVX(sv));
1213 /* shrink the sv if we allocated more than we used */
1214 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1215 SvLEN_set(sv, SvCUR(sv) + 1);
1216 Renew(SvPVX(sv), SvLEN(sv), char);
1219 /* return the substring (via yylval) only if we parsed anything */
1220 if (s > PL_bufptr) {
1221 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
1222 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
1224 ( PL_lex_inwhat == OP_TRANS
1226 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
1229 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1235 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
1237 intuit_more(register char *s)
1239 if (PL_lex_brackets)
1241 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1243 if (*s != '{' && *s != '[')
1248 /* In a pattern, so maybe we have {n,m}. */
1265 /* On the other hand, maybe we have a character class */
1268 if (*s == ']' || *s == '^')
1271 int weight = 2; /* let's weigh the evidence */
1273 unsigned char un_char = 255, last_un_char;
1274 char *send = strchr(s,']');
1275 char tmpbuf[sizeof PL_tokenbuf * 4];
1277 if (!send) /* has to be an expression */
1280 Zero(seen,256,char);
1283 else if (isDIGIT(*s)) {
1285 if (isDIGIT(s[1]) && s[2] == ']')
1291 for (; s < send; s++) {
1292 last_un_char = un_char;
1293 un_char = (unsigned char)*s;
1298 weight -= seen[un_char] * 10;
1299 if (isALNUM_lazy(s+1)) {
1300 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
1301 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1306 else if (*s == '$' && s[1] &&
1307 strchr("[#!%*<>()-=",s[1])) {
1308 if (/*{*/ strchr("])} =",s[2]))
1317 if (strchr("wds]",s[1]))
1319 else if (seen['\''] || seen['"'])
1321 else if (strchr("rnftbxcav",s[1]))
1323 else if (isDIGIT(s[1])) {
1325 while (s[1] && isDIGIT(s[1]))
1335 if (strchr("aA01! ",last_un_char))
1337 if (strchr("zZ79~",s[1]))
1339 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1340 weight -= 5; /* cope with negative subscript */
1343 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1344 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1349 if (keyword(tmpbuf, d - tmpbuf))
1352 if (un_char == last_un_char + 1)
1354 weight -= seen[un_char];
1359 if (weight >= 0) /* probably a character class */
1367 intuit_method(char *start, GV *gv)
1369 char *s = start + (*start == '$');
1370 char tmpbuf[sizeof PL_tokenbuf];
1378 if ((cv = GvCVu(gv))) {
1379 char *proto = SvPVX(cv);
1389 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1390 if (*start == '$') {
1391 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
1396 return *s == '(' ? FUNCMETH : METHOD;
1398 if (!keyword(tmpbuf, len)) {
1399 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1404 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
1405 if (indirgv && GvCVu(indirgv))
1407 /* filehandle or package name makes it a method */
1408 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1410 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1411 return 0; /* no assumptions -- "=>" quotes bearword */
1413 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
1415 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1419 return *s == '(' ? FUNCMETH : METHOD;
1429 char *pdb = PerlEnv_getenv("PERL5DB");
1433 SETERRNO(0,SS$_NORMAL);
1434 return "BEGIN { require 'perl5db.pl' }";
1440 /* Encoded script support. filter_add() effectively inserts a
1441 * 'pre-processing' function into the current source input stream.
1442 * Note that the filter function only applies to the current source file
1443 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1445 * The datasv parameter (which may be NULL) can be used to pass
1446 * private data to this instance of the filter. The filter function
1447 * can recover the SV using the FILTER_DATA macro and use it to
1448 * store private buffers and state information.
1450 * The supplied datasv parameter is upgraded to a PVIO type
1451 * and the IoDIRP field is used to store the function pointer.
1452 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1453 * private use must be set using malloc'd pointers.
1457 filter_add(filter_t funcp, SV *datasv)
1459 if (!funcp){ /* temporary handy debugging hack to be deleted */
1460 PL_filter_debug = atoi((char*)datasv);
1463 if (!PL_rsfp_filters)
1464 PL_rsfp_filters = newAV();
1466 datasv = NEWSV(255,0);
1467 if (!SvUPGRADE(datasv, SVt_PVIO))
1468 die("Can't upgrade filter_add data to SVt_PVIO");
1469 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1470 if (PL_filter_debug) {
1472 warn("filter_add func %p (%s)", funcp, SvPV(datasv, n_a));
1474 av_unshift(PL_rsfp_filters, 1);
1475 av_store(PL_rsfp_filters, 0, datasv) ;
1480 /* Delete most recently added instance of this filter function. */
1482 filter_del(filter_t funcp)
1484 if (PL_filter_debug)
1485 warn("filter_del func %p", funcp);
1486 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
1488 /* if filter is on top of stack (usual case) just pop it off */
1489 if (IoDIRP(FILTER_DATA(AvFILLp(PL_rsfp_filters))) == (DIR*)funcp){
1490 sv_free(av_pop(PL_rsfp_filters));
1494 /* we need to search for the correct entry and clear it */
1495 die("filter_del can only delete in reverse order (currently)");
1499 /* Invoke the n'th filter function for the current rsfp. */
1501 filter_read(int idx, SV *buf_sv, int maxlen)
1504 /* 0 = read one text line */
1509 if (!PL_rsfp_filters)
1511 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1512 /* Provide a default input filter to make life easy. */
1513 /* Note that we append to the line. This is handy. */
1514 if (PL_filter_debug)
1515 warn("filter_read %d: from rsfp\n", idx);
1519 int old_len = SvCUR(buf_sv) ;
1521 /* ensure buf_sv is large enough */
1522 SvGROW(buf_sv, old_len + maxlen) ;
1523 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1524 if (PerlIO_error(PL_rsfp))
1525 return -1; /* error */
1527 return 0 ; /* end of file */
1529 SvCUR_set(buf_sv, old_len + len) ;
1532 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
1533 if (PerlIO_error(PL_rsfp))
1534 return -1; /* error */
1536 return 0 ; /* end of file */
1539 return SvCUR(buf_sv);
1541 /* Skip this filter slot if filter has been deleted */
1542 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
1543 if (PL_filter_debug)
1544 warn("filter_read %d: skipped (filter deleted)\n", idx);
1545 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1547 /* Get function pointer hidden within datasv */
1548 funcp = (filter_t)IoDIRP(datasv);
1549 if (PL_filter_debug) {
1551 warn("filter_read %d: via function %p (%s)\n",
1552 idx, funcp, SvPV(datasv,n_a));
1554 /* Call function. The function is expected to */
1555 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1556 /* Return: <0:error, =0:eof, >0:not eof */
1557 return (*funcp)(PERL_OBJECT_THIS_ idx, buf_sv, maxlen);
1561 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1564 if (!PL_rsfp_filters) {
1565 filter_add(win32_textfilter,NULL);
1568 if (PL_rsfp_filters) {
1571 SvCUR_set(sv, 0); /* start with empty line */
1572 if (FILTER_READ(0, sv, 0) > 0)
1573 return ( SvPVX(sv) ) ;
1578 return (sv_gets(sv, fp, append));
1583 static char* exp_name[] =
1584 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1590 Works out what to call the token just pulled out of the input
1591 stream. The yacc parser takes care of taking the ops we return and
1592 stitching them into a tree.
1598 if read an identifier
1599 if we're in a my declaration
1600 croak if they tried to say my($foo::bar)
1601 build the ops for a my() declaration
1602 if it's an access to a my() variable
1603 are we in a sort block?
1604 croak if my($a); $a <=> $b
1605 build ops for access to a my() variable
1606 if in a dq string, and they've said @foo and we can't find @foo
1608 build ops for a bareword
1609 if we already built the token before, use it.
1612 int yylex(PERL_YYLEX_PARAM_DECL)
1622 #ifdef USE_PURE_BISON
1623 yylval_pointer = lvalp;
1624 yychar_pointer = lcharp;
1627 /* check if there's an identifier for us to look at */
1628 if (PL_pending_ident) {
1629 /* pit holds the identifier we read and pending_ident is reset */
1630 char pit = PL_pending_ident;
1631 PL_pending_ident = 0;
1633 /* if we're in a my(), we can't allow dynamics here.
1634 $foo'bar has already been turned into $foo::bar, so
1635 just check for colons.
1637 if it's a legal name, the OP is a PADANY.
1640 if (strchr(PL_tokenbuf,':'))
1641 yyerror(form(PL_no_myglob,PL_tokenbuf));
1643 yylval.opval = newOP(OP_PADANY, 0);
1644 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
1649 build the ops for accesses to a my() variable.
1651 Deny my($a) or my($b) in a sort block, *if* $a or $b is
1652 then used in a comparison. This catches most, but not
1653 all cases. For instance, it catches
1654 sort { my($a); $a <=> $b }
1656 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
1657 (although why you'd do that is anyone's guess).
1660 if (!strchr(PL_tokenbuf,':')) {
1662 /* Check for single character per-thread SVs */
1663 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
1664 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
1665 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
1667 yylval.opval = newOP(OP_THREADSV, 0);
1668 yylval.opval->op_targ = tmp;
1671 #endif /* USE_THREADS */
1672 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
1673 /* if it's a sort block and they're naming $a or $b */
1674 if (PL_last_lop_op == OP_SORT &&
1675 PL_tokenbuf[0] == '$' &&
1676 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
1679 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
1680 d < PL_bufend && *d != '\n';
1683 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1684 croak("Can't use \"my %s\" in sort comparison",
1690 yylval.opval = newOP(OP_PADANY, 0);
1691 yylval.opval->op_targ = tmp;
1697 Whine if they've said @foo in a doublequoted string,
1698 and @foo isn't a variable we can find in the symbol
1701 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
1702 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
1703 if (!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1704 yyerror(form("In string, %s now must be written as \\%s",
1705 PL_tokenbuf, PL_tokenbuf));
1708 /* build ops for a bareword */
1709 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
1710 yylval.opval->op_private = OPpCONST_ENTERED;
1711 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
1712 ((PL_tokenbuf[0] == '$') ? SVt_PV
1713 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
1718 /* no identifier pending identification */
1720 switch (PL_lex_state) {
1722 case LEX_NORMAL: /* Some compilers will produce faster */
1723 case LEX_INTERPNORMAL: /* code if we comment these out. */
1727 /* when we're already built the next token, just pull it out the queue */
1730 yylval = PL_nextval[PL_nexttoke];
1732 PL_lex_state = PL_lex_defer;
1733 PL_expect = PL_lex_expect;
1734 PL_lex_defer = LEX_NORMAL;
1736 return(PL_nexttype[PL_nexttoke]);
1738 /* interpolated case modifiers like \L \U, including \Q and \E.
1739 when we get here, PL_bufptr is at the \
1741 case LEX_INTERPCASEMOD:
1743 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
1744 croak("panic: INTERPCASEMOD");
1746 /* handle \E or end of string */
1747 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
1751 if (PL_lex_casemods) {
1752 oldmod = PL_lex_casestack[--PL_lex_casemods];
1753 PL_lex_casestack[PL_lex_casemods] = '\0';
1755 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
1757 PL_lex_state = LEX_INTERPCONCAT;
1761 if (PL_bufptr != PL_bufend)
1763 PL_lex_state = LEX_INTERPCONCAT;
1764 return yylex(PERL_YYLEX_PARAM);
1768 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1769 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1770 if (strchr("LU", *s) &&
1771 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
1773 PL_lex_casestack[--PL_lex_casemods] = '\0';
1776 if (PL_lex_casemods > 10) {
1777 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
1778 if (newlb != PL_lex_casestack) {
1780 PL_lex_casestack = newlb;
1783 PL_lex_casestack[PL_lex_casemods++] = *s;
1784 PL_lex_casestack[PL_lex_casemods] = '\0';
1785 PL_lex_state = LEX_INTERPCONCAT;
1786 PL_nextval[PL_nexttoke].ival = 0;
1789 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
1791 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
1793 PL_nextval[PL_nexttoke].ival = OP_LC;
1795 PL_nextval[PL_nexttoke].ival = OP_UC;
1797 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
1799 croak("panic: yylex");
1802 if (PL_lex_starts) {
1808 return yylex(PERL_YYLEX_PARAM);
1811 case LEX_INTERPPUSH:
1812 return sublex_push();
1814 case LEX_INTERPSTART:
1815 if (PL_bufptr == PL_bufend)
1816 return sublex_done();
1818 PL_lex_dojoin = (*PL_bufptr == '@');
1819 PL_lex_state = LEX_INTERPNORMAL;
1820 if (PL_lex_dojoin) {
1821 PL_nextval[PL_nexttoke].ival = 0;
1824 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
1825 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
1826 force_next(PRIVATEREF);
1828 force_ident("\"", '$');
1829 #endif /* USE_THREADS */
1830 PL_nextval[PL_nexttoke].ival = 0;
1832 PL_nextval[PL_nexttoke].ival = 0;
1834 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1837 if (PL_lex_starts++) {
1841 return yylex(PERL_YYLEX_PARAM);
1843 case LEX_INTERPENDMAYBE:
1844 if (intuit_more(PL_bufptr)) {
1845 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1851 if (PL_lex_dojoin) {
1852 PL_lex_dojoin = FALSE;
1853 PL_lex_state = LEX_INTERPCONCAT;
1856 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
1857 && SvCOMPILED(PL_lex_repl))
1859 if (PL_bufptr != PL_bufend)
1860 croak("Bad evalled substitution pattern");
1861 PL_lex_repl = Nullsv;
1864 case LEX_INTERPCONCAT:
1866 if (PL_lex_brackets)
1867 croak("panic: INTERPCONCAT");
1869 if (PL_bufptr == PL_bufend)
1870 return sublex_done();
1872 if (SvIVX(PL_linestr) == '\'') {
1873 SV *sv = newSVsv(PL_linestr);
1876 else if ( PL_hints & HINT_NEW_RE )
1877 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
1878 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1882 s = scan_const(PL_bufptr);
1884 PL_lex_state = LEX_INTERPCASEMOD;
1886 PL_lex_state = LEX_INTERPSTART;
1889 if (s != PL_bufptr) {
1890 PL_nextval[PL_nexttoke] = yylval;
1893 if (PL_lex_starts++)
1897 return yylex(PERL_YYLEX_PARAM);
1901 return yylex(PERL_YYLEX_PARAM);
1903 PL_lex_state = LEX_NORMAL;
1904 s = scan_formline(PL_bufptr);
1905 if (!PL_lex_formbrack)
1911 PL_oldoldbufptr = PL_oldbufptr;
1914 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[PL_expect], s);
1920 if (isIDFIRST_lazy(s))
1922 croak("Unrecognized character \\x%02X", *s & 255);
1925 goto fake_eof; /* emulate EOF on ^D or ^Z */
1930 if (PL_lex_brackets)
1931 yyerror("Missing right bracket");
1934 if (s++ < PL_bufend)
1935 goto retry; /* ignore stray nulls */
1938 if (!PL_in_eval && !PL_preambled) {
1939 PL_preambled = TRUE;
1940 sv_setpv(PL_linestr,incl_perldb());
1941 if (SvCUR(PL_linestr))
1942 sv_catpv(PL_linestr,";");
1944 while(AvFILLp(PL_preambleav) >= 0) {
1945 SV *tmpsv = av_shift(PL_preambleav);
1946 sv_catsv(PL_linestr, tmpsv);
1947 sv_catpv(PL_linestr, ";");
1950 sv_free((SV*)PL_preambleav);
1951 PL_preambleav = NULL;
1953 if (PL_minus_n || PL_minus_p) {
1954 sv_catpv(PL_linestr, "LINE: while (<>) {");
1956 sv_catpv(PL_linestr,"chomp;");
1958 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1960 GvIMPORTED_AV_on(gv);
1962 if (strchr("/'\"", *PL_splitstr)
1963 && strchr(PL_splitstr + 1, *PL_splitstr))
1964 sv_catpvf(PL_linestr, "@F=split(%s);", PL_splitstr);
1967 s = "'~#\200\1'"; /* surely one char is unused...*/
1968 while (s[1] && strchr(PL_splitstr, *s)) s++;
1970 sv_catpvf(PL_linestr, "@F=split(%s%c",
1971 "q" + (delim == '\''), delim);
1972 for (s = PL_splitstr; *s; s++) {
1974 sv_catpvn(PL_linestr, "\\", 1);
1975 sv_catpvn(PL_linestr, s, 1);
1977 sv_catpvf(PL_linestr, "%c);", delim);
1981 sv_catpv(PL_linestr,"@F=split(' ');");
1984 sv_catpv(PL_linestr, "\n");
1985 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
1986 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
1987 if (PERLDB_LINE && PL_curstash != PL_debstash) {
1988 SV *sv = NEWSV(85,0);
1990 sv_upgrade(sv, SVt_PVMG);
1991 sv_setsv(sv,PL_linestr);
1992 av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
1997 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2000 if (PL_preprocess && !PL_in_eval)
2001 (void)PerlProc_pclose(PL_rsfp);
2002 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2003 PerlIO_clearerr(PL_rsfp);
2005 (void)PerlIO_close(PL_rsfp);
2007 PL_doextract = FALSE;
2009 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2010 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2011 sv_catpv(PL_linestr,";}");
2012 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2013 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2014 PL_minus_n = PL_minus_p = 0;
2017 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2018 sv_setpv(PL_linestr,"");
2019 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2022 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2023 PL_doextract = FALSE;
2025 /* Incest with pod. */
2026 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2027 sv_setpv(PL_linestr, "");
2028 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2029 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2030 PL_doextract = FALSE;
2034 } while (PL_doextract);
2035 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2036 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2037 SV *sv = NEWSV(85,0);
2039 sv_upgrade(sv, SVt_PVMG);
2040 sv_setsv(sv,PL_linestr);
2041 av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
2043 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2044 if (PL_curcop->cop_line == 1) {
2045 while (s < PL_bufend && isSPACE(*s))
2047 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2051 if (*s == '#' && *(s+1) == '!')
2053 #ifdef ALTERNATE_SHEBANG
2055 static char as[] = ALTERNATE_SHEBANG;
2056 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2057 d = s + (sizeof(as) - 1);
2059 #endif /* ALTERNATE_SHEBANG */
2068 while (*d && !isSPACE(*d))
2072 #ifdef ARG_ZERO_IS_SCRIPT
2073 if (ipathend > ipath) {
2075 * HP-UX (at least) sets argv[0] to the script name,
2076 * which makes $^X incorrect. And Digital UNIX and Linux,
2077 * at least, set argv[0] to the basename of the Perl
2078 * interpreter. So, having found "#!", we'll set it right.
2080 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2081 assert(SvPOK(x) || SvGMAGICAL(x));
2082 if (sv_eq(x, GvSV(PL_curcop->cop_filegv))) {
2083 sv_setpvn(x, ipath, ipathend - ipath);
2086 TAINT_NOT; /* $^X is always tainted, but that's OK */
2088 #endif /* ARG_ZERO_IS_SCRIPT */
2093 d = instr(s,"perl -");
2095 d = instr(s,"perl");
2096 #ifdef ALTERNATE_SHEBANG
2098 * If the ALTERNATE_SHEBANG on this system starts with a
2099 * character that can be part of a Perl expression, then if
2100 * we see it but not "perl", we're probably looking at the
2101 * start of Perl code, not a request to hand off to some
2102 * other interpreter. Similarly, if "perl" is there, but
2103 * not in the first 'word' of the line, we assume the line
2104 * contains the start of the Perl program.
2106 if (d && *s != '#') {
2108 while (*c && !strchr("; \t\r\n\f\v#", *c))
2111 d = Nullch; /* "perl" not in first word; ignore */
2113 *s = '#'; /* Don't try to parse shebang line */
2115 #endif /* ALTERNATE_SHEBANG */
2120 !instr(s,"indir") &&
2121 instr(PL_origargv[0],"perl"))
2127 while (s < PL_bufend && isSPACE(*s))
2129 if (s < PL_bufend) {
2130 Newz(899,newargv,PL_origargc+3,char*);
2132 while (s < PL_bufend && !isSPACE(*s))
2135 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2138 newargv = PL_origargv;
2140 PerlProc_execv(ipath, newargv);
2141 croak("Can't exec %s", ipath);
2144 U32 oldpdb = PL_perldb;
2145 bool oldn = PL_minus_n;
2146 bool oldp = PL_minus_p;
2148 while (*d && !isSPACE(*d)) d++;
2149 while (*d == ' ' || *d == '\t') d++;
2153 if (*d == 'M' || *d == 'm') {
2155 while (*d && !isSPACE(*d)) d++;
2156 croak("Too late for \"-%.*s\" option",
2159 d = moreswitches(d);
2161 if (PERLDB_LINE && !oldpdb ||
2162 ( PL_minus_n || PL_minus_p ) && !(oldn || oldp) )
2163 /* if we have already added "LINE: while (<>) {",
2164 we must not do it again */
2166 sv_setpv(PL_linestr, "");
2167 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2168 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2169 PL_preambled = FALSE;
2171 (void)gv_fetchfile(PL_origfilename);
2178 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2180 PL_lex_state = LEX_FORMLINE;
2181 return yylex(PERL_YYLEX_PARAM);
2185 #ifdef PERL_STRICT_CR
2186 warn("Illegal character \\%03o (carriage return)", '\r');
2188 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
2190 case ' ': case '\t': case '\f': case 013:
2195 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2197 while (s < d && *s != '\n')
2202 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2204 PL_lex_state = LEX_FORMLINE;
2205 return yylex(PERL_YYLEX_PARAM);
2214 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2219 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2222 if (strnEQ(s,"=>",2)) {
2223 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2224 OPERATOR('-'); /* unary minus */
2226 PL_last_uni = PL_oldbufptr;
2227 PL_last_lop_op = OP_FTEREAD; /* good enough */
2229 case 'r': FTST(OP_FTEREAD);
2230 case 'w': FTST(OP_FTEWRITE);
2231 case 'x': FTST(OP_FTEEXEC);
2232 case 'o': FTST(OP_FTEOWNED);
2233 case 'R': FTST(OP_FTRREAD);
2234 case 'W': FTST(OP_FTRWRITE);
2235 case 'X': FTST(OP_FTREXEC);
2236 case 'O': FTST(OP_FTROWNED);
2237 case 'e': FTST(OP_FTIS);
2238 case 'z': FTST(OP_FTZERO);
2239 case 's': FTST(OP_FTSIZE);
2240 case 'f': FTST(OP_FTFILE);
2241 case 'd': FTST(OP_FTDIR);
2242 case 'l': FTST(OP_FTLINK);
2243 case 'p': FTST(OP_FTPIPE);
2244 case 'S': FTST(OP_FTSOCK);
2245 case 'u': FTST(OP_FTSUID);
2246 case 'g': FTST(OP_FTSGID);
2247 case 'k': FTST(OP_FTSVTX);
2248 case 'b': FTST(OP_FTBLK);
2249 case 'c': FTST(OP_FTCHR);
2250 case 't': FTST(OP_FTTTY);
2251 case 'T': FTST(OP_FTTEXT);
2252 case 'B': FTST(OP_FTBINARY);
2253 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
2254 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
2255 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
2257 croak("Unrecognized file test: -%c", (int)tmp);
2264 if (PL_expect == XOPERATOR)
2269 else if (*s == '>') {
2272 if (isIDFIRST_lazy(s)) {
2273 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2281 if (PL_expect == XOPERATOR)
2284 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2286 OPERATOR('-'); /* unary minus */
2293 if (PL_expect == XOPERATOR)
2298 if (PL_expect == XOPERATOR)
2301 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2307 if (PL_expect != XOPERATOR) {
2308 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2309 PL_expect = XOPERATOR;
2310 force_ident(PL_tokenbuf, '*');
2323 if (PL_expect == XOPERATOR) {
2327 PL_tokenbuf[0] = '%';
2328 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2329 if (!PL_tokenbuf[1]) {
2331 yyerror("Final % should be \\% or %name");
2334 PL_pending_ident = '%';
2356 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
2357 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
2362 if (PL_curcop->cop_line < PL_copline)
2363 PL_copline = PL_curcop->cop_line;
2374 if (PL_lex_brackets <= 0)
2375 yyerror("Unmatched right bracket");
2378 if (PL_lex_state == LEX_INTERPNORMAL) {
2379 if (PL_lex_brackets == 0) {
2380 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
2381 PL_lex_state = LEX_INTERPEND;
2388 if (PL_lex_brackets > 100) {
2389 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
2390 if (newlb != PL_lex_brackstack) {
2392 PL_lex_brackstack = newlb;
2395 switch (PL_expect) {
2397 if (PL_lex_formbrack) {
2401 if (PL_oldoldbufptr == PL_last_lop)
2402 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2404 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2405 OPERATOR(HASHBRACK);
2407 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2410 PL_tokenbuf[0] = '\0';
2411 if (d < PL_bufend && *d == '-') {
2412 PL_tokenbuf[0] = '-';
2414 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2417 if (d < PL_bufend && isIDFIRST_lazy(d)) {
2418 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
2420 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2423 char minus = (PL_tokenbuf[0] == '-');
2424 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2431 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
2435 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2440 if (PL_oldoldbufptr == PL_last_lop)
2441 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2443 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2446 OPERATOR(HASHBRACK);
2447 /* This hack serves to disambiguate a pair of curlies
2448 * as being a block or an anon hash. Normally, expectation
2449 * determines that, but in cases where we're not in a
2450 * position to expect anything in particular (like inside
2451 * eval"") we have to resolve the ambiguity. This code
2452 * covers the case where the first term in the curlies is a
2453 * quoted string. Most other cases need to be explicitly
2454 * disambiguated by prepending a `+' before the opening
2455 * curly in order to force resolution as an anon hash.
2457 * XXX should probably propagate the outer expectation
2458 * into eval"" to rely less on this hack, but that could
2459 * potentially break current behavior of eval"".
2463 if (*s == '\'' || *s == '"' || *s == '`') {
2464 /* common case: get past first string, handling escapes */
2465 for (t++; t < PL_bufend && *t != *s;)
2466 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2470 else if (*s == 'q') {
2473 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
2474 && !isALNUM(*t)))) {
2476 char open, close, term;
2479 while (t < PL_bufend && isSPACE(*t))
2483 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2487 for (t++; t < PL_bufend; t++) {
2488 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
2490 else if (*t == open)
2494 for (t++; t < PL_bufend; t++) {
2495 if (*t == '\\' && t+1 < PL_bufend)
2497 else if (*t == close && --brackets <= 0)
2499 else if (*t == open)
2505 else if (isIDFIRST_lazy(s)) {
2506 for (t++; t < PL_bufend && isALNUM_lazy(t); t++) ;
2508 while (t < PL_bufend && isSPACE(*t))
2510 /* if comma follows first term, call it an anon hash */
2511 /* XXX it could be a comma expression with loop modifiers */
2512 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2513 || (*t == '=' && t[1] == '>')))
2514 OPERATOR(HASHBRACK);
2515 if (PL_expect == XREF)
2516 PL_expect = XSTATE; /* was XTERM, trying XSTATE */
2518 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
2524 yylval.ival = PL_curcop->cop_line;
2525 if (isSPACE(*s) || *s == '#')
2526 PL_copline = NOLINE; /* invalidate current command line number */
2531 if (PL_lex_brackets <= 0)
2532 yyerror("Unmatched right bracket");
2534 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
2535 if (PL_lex_brackets < PL_lex_formbrack)
2536 PL_lex_formbrack = 0;
2537 if (PL_lex_state == LEX_INTERPNORMAL) {
2538 if (PL_lex_brackets == 0) {
2539 if (PL_lex_fakebrack) {
2540 PL_lex_state = LEX_INTERPEND;
2542 return yylex(PERL_YYLEX_PARAM); /* ignore fake brackets */
2544 if (*s == '-' && s[1] == '>')
2545 PL_lex_state = LEX_INTERPENDMAYBE;
2546 else if (*s != '[' && *s != '{')
2547 PL_lex_state = LEX_INTERPEND;
2550 if (PL_lex_brackets < PL_lex_fakebrack) {
2552 PL_lex_fakebrack = 0;
2553 return yylex(PERL_YYLEX_PARAM); /* ignore fake brackets */
2563 if (PL_expect == XOPERATOR) {
2564 if (ckWARN(WARN_SEMICOLON) && isIDFIRST_lazy(s) && PL_bufptr == PL_linestart) {
2565 PL_curcop->cop_line--;
2566 warner(WARN_SEMICOLON, PL_warn_nosemi);
2567 PL_curcop->cop_line++;
2572 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2574 PL_expect = XOPERATOR;
2575 force_ident(PL_tokenbuf, '&');
2579 yylval.ival = (OPpENTERSUB_AMPER<<8);
2598 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2599 warner(WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
2601 if (PL_expect == XSTATE && isALPHA(tmp) &&
2602 (s == PL_linestart+1 || s[-2] == '\n') )
2604 if (PL_in_eval && !PL_rsfp) {
2609 if (strnEQ(s,"=cut",4)) {
2623 PL_doextract = TRUE;
2626 if (PL_lex_brackets < PL_lex_formbrack) {
2628 #ifdef PERL_STRICT_CR
2629 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2631 for (t = s; *t == ' ' || *t == '\t' || *t == '\r'; t++) ;
2633 if (*t == '\n' || *t == '#') {
2651 if (PL_expect != XOPERATOR) {
2652 if (s[1] != '<' && !strchr(s,'>'))
2655 s = scan_heredoc(s);
2657 s = scan_inputsymbol(s);
2658 TERM(sublex_start());
2663 SHop(OP_LEFT_SHIFT);
2677 SHop(OP_RIGHT_SHIFT);
2686 if (PL_expect == XOPERATOR) {
2687 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2690 return ','; /* grandfather non-comma-format format */
2694 if (s[1] == '#' && (isIDFIRST_lazy(s+2) || strchr("{$:+-", s[2]))) {
2695 if (PL_expect == XOPERATOR)
2696 no_op("Array length", PL_bufptr);
2697 PL_tokenbuf[0] = '@';
2698 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
2700 if (!PL_tokenbuf[1])
2702 PL_expect = XOPERATOR;
2703 PL_pending_ident = '#';
2707 if (PL_expect == XOPERATOR)
2708 no_op("Scalar", PL_bufptr);
2709 PL_tokenbuf[0] = '$';
2710 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
2711 if (!PL_tokenbuf[1]) {
2713 yyerror("Final $ should be \\$ or $name");
2717 /* This kludge not intended to be bulletproof. */
2718 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
2719 yylval.opval = newSVOP(OP_CONST, 0,
2720 newSViv((IV)PL_compiling.cop_arybase));
2721 yylval.opval->op_private = OPpCONST_ARYBASE;
2726 if (PL_lex_state == LEX_NORMAL)
2729 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
2732 PL_tokenbuf[0] = '@';
2733 if (ckWARN(WARN_SYNTAX)) {
2735 isSPACE(*t) || isALNUM_lazy(t) || *t == '$';
2738 PL_bufptr = skipspace(PL_bufptr);
2739 while (t < PL_bufend && *t != ']')
2742 "Multidimensional syntax %.*s not supported",
2743 (t - PL_bufptr) + 1, PL_bufptr);
2747 else if (*s == '{') {
2748 PL_tokenbuf[0] = '%';
2749 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
2750 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2752 char tmpbuf[sizeof PL_tokenbuf];
2754 for (t++; isSPACE(*t); t++) ;
2755 if (isIDFIRST_lazy(t)) {
2756 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2757 for (; isSPACE(*t); t++) ;
2758 if (*t == ';' && perl_get_cv(tmpbuf, FALSE))
2760 "You need to quote \"%s\"", tmpbuf);
2766 PL_expect = XOPERATOR;
2767 if (PL_lex_state == LEX_NORMAL && isSPACE(*d)) {
2768 bool islop = (PL_last_lop == PL_oldoldbufptr);
2769 if (!islop || PL_last_lop_op == OP_GREPSTART)
2770 PL_expect = XOPERATOR;
2771 else if (strchr("$@\"'`q", *s))
2772 PL_expect = XTERM; /* e.g. print $fh "foo" */
2773 else if (strchr("&*<%", *s) && isIDFIRST_lazy(s+1))
2774 PL_expect = XTERM; /* e.g. print $fh &sub */
2775 else if (isIDFIRST_lazy(s)) {
2776 char tmpbuf[sizeof PL_tokenbuf];
2777 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2778 if (tmp = keyword(tmpbuf, len)) {
2779 /* binary operators exclude handle interpretations */
2791 PL_expect = XTERM; /* e.g. print $fh length() */
2796 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2797 if (gv && GvCVu(gv))
2798 PL_expect = XTERM; /* e.g. print $fh subr() */
2801 else if (isDIGIT(*s))
2802 PL_expect = XTERM; /* e.g. print $fh 3 */
2803 else if (*s == '.' && isDIGIT(s[1]))
2804 PL_expect = XTERM; /* e.g. print $fh .3 */
2805 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
2806 PL_expect = XTERM; /* e.g. print $fh -1 */
2807 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
2808 PL_expect = XTERM; /* print $fh <<"EOF" */
2810 PL_pending_ident = '$';
2814 if (PL_expect == XOPERATOR)
2816 PL_tokenbuf[0] = '@';
2817 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
2818 if (!PL_tokenbuf[1]) {
2820 yyerror("Final @ should be \\@ or @name");
2823 if (PL_lex_state == LEX_NORMAL)
2825 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
2827 PL_tokenbuf[0] = '%';
2829 /* Warn about @ where they meant $. */
2830 if (ckWARN(WARN_SYNTAX)) {
2831 if (*s == '[' || *s == '{') {
2833 while (*t && (isALNUM_lazy(t) || strchr(" \t$#+-'\"", *t)))
2835 if (*t == '}' || *t == ']') {
2837 PL_bufptr = skipspace(PL_bufptr);
2839 "Scalar value %.*s better written as $%.*s",
2840 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
2845 PL_pending_ident = '@';
2848 case '/': /* may either be division or pattern */
2849 case '?': /* may either be conditional or pattern */
2850 if (PL_expect != XOPERATOR) {
2851 /* Disable warning on "study /blah/" */
2852 if (PL_oldoldbufptr == PL_last_uni
2853 && (*PL_last_uni != 's' || s - PL_last_uni < 5
2854 || memNE(PL_last_uni, "study", 5) || isALNUM_lazy(PL_last_uni+5)))
2856 s = scan_pat(s,OP_MATCH);
2857 TERM(sublex_start());
2865 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
2866 #ifdef PERL_STRICT_CR
2869 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
2871 && (s == PL_linestart || s[-1] == '\n') )
2873 PL_lex_formbrack = 0;
2877 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
2883 yylval.ival = OPf_SPECIAL;
2889 if (PL_expect != XOPERATOR)
2894 case '0': case '1': case '2': case '3': case '4':
2895 case '5': case '6': case '7': case '8': case '9':
2897 if (PL_expect == XOPERATOR)
2903 if (PL_expect == XOPERATOR) {
2904 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2907 return ','; /* grandfather non-comma-format format */
2913 missingterm((char*)0);
2914 yylval.ival = OP_CONST;
2915 TERM(sublex_start());
2919 if (PL_expect == XOPERATOR) {
2920 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2923 return ','; /* grandfather non-comma-format format */
2929 missingterm((char*)0);
2930 yylval.ival = OP_CONST;
2931 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
2932 if (*d == '$' || *d == '@' || *d == '\\' || *d & 0x80) {
2933 yylval.ival = OP_STRINGIFY;
2937 TERM(sublex_start());
2941 if (PL_expect == XOPERATOR)
2942 no_op("Backticks",s);
2944 missingterm((char*)0);
2945 yylval.ival = OP_BACKTICK;
2947 TERM(sublex_start());
2951 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
2952 warner(WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
2954 if (PL_expect == XOPERATOR)
2955 no_op("Backslash",s);
2959 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
2999 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3001 /* Some keywords can be followed by any delimiter, including ':' */
3002 tmp = (len == 1 && strchr("msyq", PL_tokenbuf[0]) ||
3003 len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3004 (PL_tokenbuf[0] == 'q' &&
3005 strchr("qwxr", PL_tokenbuf[1]))));
3007 /* x::* is just a word, unless x is "CORE" */
3008 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3012 while (d < PL_bufend && isSPACE(*d))
3013 d++; /* no comments skipped here, or s### is misparsed */
3015 /* Is this a label? */
3016 if (!tmp && PL_expect == XSTATE
3017 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3019 yylval.pval = savepv(PL_tokenbuf);
3024 /* Check for keywords */
3025 tmp = keyword(PL_tokenbuf, len);
3027 /* Is this a word before a => operator? */
3028 if (strnEQ(d,"=>",2)) {
3030 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3031 yylval.opval->op_private = OPpCONST_BARE;
3035 if (tmp < 0) { /* second-class keyword? */
3036 GV *ogv = Nullgv; /* override (winner) */
3037 GV *hgv = Nullgv; /* hidden (loser) */
3038 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3040 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3043 if (GvIMPORTED_CV(gv))
3045 else if (! CvMETHOD(cv))
3049 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3050 (gv = *gvp) != (GV*)&PL_sv_undef &&
3051 GvCVu(gv) && GvIMPORTED_CV(gv))
3057 tmp = 0; /* overridden by import or by GLOBAL */
3060 && -tmp==KEY_lock /* XXX generalizable kludge */
3061 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3063 tmp = 0; /* any sub overrides "weak" keyword */
3065 else { /* no override */
3069 if (ckWARN(WARN_AMBIGUOUS) && hgv
3070 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3071 warner(WARN_AMBIGUOUS,
3072 "Ambiguous call resolved as CORE::%s(), %s",
3073 GvENAME(hgv), "qualify as such or use &");
3080 default: /* not a keyword */
3083 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3085 /* Get the rest if it looks like a package qualifier */
3087 if (*s == '\'' || *s == ':' && s[1] == ':') {
3089 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3092 croak("Bad name after %s%s", PL_tokenbuf,
3093 *s == '\'' ? "'" : "::");
3097 if (PL_expect == XOPERATOR) {
3098 if (PL_bufptr == PL_linestart) {
3099 PL_curcop->cop_line--;
3100 warner(WARN_SEMICOLON, PL_warn_nosemi);
3101 PL_curcop->cop_line++;
3104 no_op("Bareword",s);
3107 /* Look for a subroutine with this name in current package,
3108 unless name is "Foo::", in which case Foo is a bearword
3109 (and a package name). */
3112 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3114 if (ckWARN(WARN_UNSAFE) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3116 "Bareword \"%s\" refers to nonexistent package",
3119 PL_tokenbuf[len] = '\0';
3126 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3129 /* if we saw a global override before, get the right name */
3132 sv = newSVpv("CORE::GLOBAL::",14);
3133 sv_catpv(sv,PL_tokenbuf);
3136 sv = newSVpv(PL_tokenbuf,0);
3138 /* Presume this is going to be a bareword of some sort. */
3141 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3142 yylval.opval->op_private = OPpCONST_BARE;
3144 /* And if "Foo::", then that's what it certainly is. */
3149 /* See if it's the indirect object for a list operator. */
3151 if (PL_oldoldbufptr &&
3152 PL_oldoldbufptr < PL_bufptr &&
3153 (PL_oldoldbufptr == PL_last_lop || PL_oldoldbufptr == PL_last_uni) &&
3154 /* NO SKIPSPACE BEFORE HERE! */
3156 || ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF
3157 || (PL_last_lop_op == OP_ENTERSUB
3159 && PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*')) )
3161 bool immediate_paren = *s == '(';
3163 /* (Now we can afford to cross potential line boundary.) */
3166 /* Two barewords in a row may indicate method call. */
3168 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp=intuit_method(s,gv)))
3171 /* If not a declared subroutine, it's an indirect object. */
3172 /* (But it's an indir obj regardless for sort.) */
3174 if ((PL_last_lop_op == OP_SORT ||
3175 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
3176 (PL_last_lop_op != OP_MAPSTART && PL_last_lop_op != OP_GREPSTART)){
3177 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3182 /* If followed by a paren, it's certainly a subroutine. */
3184 PL_expect = XOPERATOR;
3188 if (gv && GvCVu(gv)) {
3190 if ((cv = GvCV(gv)) && SvPOK(cv))
3191 PL_last_proto = SvPV((SV*)cv, n_a);
3192 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
3193 if (*d == ')' && (sv = cv_const_sv(cv))) {
3198 PL_nextval[PL_nexttoke].opval = yylval.opval;
3199 PL_expect = XOPERATOR;
3202 PL_last_lop_op = OP_ENTERSUB;
3206 /* If followed by var or block, call it a method (unless sub) */
3208 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3209 PL_last_lop = PL_oldbufptr;
3210 PL_last_lop_op = OP_METHOD;
3214 /* If followed by a bareword, see if it looks like indir obj. */
3216 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp = intuit_method(s,gv)))
3219 /* Not a method, so call it a subroutine (if defined) */
3221 if (gv && GvCVu(gv)) {
3223 if (lastchar == '-')
3224 warn("Ambiguous use of -%s resolved as -&%s()",
3225 PL_tokenbuf, PL_tokenbuf);
3226 PL_last_lop = PL_oldbufptr;
3227 PL_last_lop_op = OP_ENTERSUB;
3228 /* Check for a constant sub */
3230 if ((sv = cv_const_sv(cv))) {
3232 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3233 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3234 yylval.opval->op_private = 0;
3238 /* Resolve to GV now. */
3239 op_free(yylval.opval);
3240 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3241 PL_last_lop_op = OP_ENTERSUB;
3242 /* Is there a prototype? */
3245 PL_last_proto = SvPV((SV*)cv, len);
3248 if (strEQ(PL_last_proto, "$"))
3250 if (*PL_last_proto == '&' && *s == '{') {
3251 sv_setpv(PL_subname,"__ANON__");
3255 PL_last_proto = NULL;
3256 PL_nextval[PL_nexttoke].opval = yylval.opval;
3262 if (PL_hints & HINT_STRICT_SUBS &&
3265 PL_last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
3266 PL_last_lop_op != OP_ACCEPT &&
3267 PL_last_lop_op != OP_PIPE_OP &&
3268 PL_last_lop_op != OP_SOCKPAIR &&
3269 !(PL_last_lop_op == OP_ENTERSUB
3271 && PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*'))
3274 "Bareword \"%s\" not allowed while \"strict subs\" in use",
3279 /* Call it a bare word */
3282 if (ckWARN(WARN_RESERVED)) {
3283 if (lastchar != '-') {
3284 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
3286 warner(WARN_RESERVED, PL_warn_reserved, PL_tokenbuf);
3291 if (lastchar && strchr("*%&", lastchar)) {
3292 warn("Operator or semicolon missing before %c%s",
3293 lastchar, PL_tokenbuf);
3294 warn("Ambiguous use of %c resolved as operator %c",
3295 lastchar, lastchar);
3301 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3302 newSVsv(GvSV(PL_curcop->cop_filegv)));
3306 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3307 newSVpvf("%ld", (long)PL_curcop->cop_line));
3310 case KEY___PACKAGE__:
3311 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3313 ? newSVsv(PL_curstname)
3322 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
3323 char *pname = "main";
3324 if (PL_tokenbuf[2] == 'D')
3325 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
3326 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
3329 GvIOp(gv) = newIO();
3330 IoIFP(GvIOp(gv)) = PL_rsfp;
3331 #if defined(HAS_FCNTL) && defined(F_SETFD)
3333 int fd = PerlIO_fileno(PL_rsfp);
3334 fcntl(fd,F_SETFD,fd >= 3);
3337 /* Mark this internal pseudo-handle as clean */
3338 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3340 IoTYPE(GvIOp(gv)) = '|';
3341 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
3342 IoTYPE(GvIOp(gv)) = '-';
3344 IoTYPE(GvIOp(gv)) = '<';
3355 if (PL_expect == XSTATE) {
3362 if (*s == ':' && s[1] == ':') {
3365 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3366 tmp = keyword(PL_tokenbuf, len);
3380 LOP(OP_ACCEPT,XTERM);
3386 LOP(OP_ATAN2,XTERM);
3395 LOP(OP_BLESS,XTERM);
3404 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
3421 if (!PL_cryptseen++)
3424 LOP(OP_CRYPT,XTERM);
3427 if (ckWARN(WARN_OCTAL)) {
3428 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
3429 if (*d != '0' && isDIGIT(*d))
3430 yywarn("chmod: mode argument is missing initial 0");
3432 LOP(OP_CHMOD,XTERM);
3435 LOP(OP_CHOWN,XTERM);
3438 LOP(OP_CONNECT,XTERM);
3454 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3458 PL_hints |= HINT_BLOCK_SCOPE;
3468 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
3469 LOP(OP_DBMOPEN,XTERM);
3475 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3482 yylval.ival = PL_curcop->cop_line;
3496 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
3497 UNIBRACK(OP_ENTEREVAL);
3512 case KEY_endhostent:
3518 case KEY_endservent:
3521 case KEY_endprotoent:
3532 yylval.ival = PL_curcop->cop_line;
3534 if (PL_expect == XSTATE && isIDFIRST_lazy(s)) {
3536 if ((PL_bufend - p) >= 3 &&
3537 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3540 if (isIDFIRST_lazy(p))
3541 croak("Missing $ on loop variable");
3546 LOP(OP_FORMLINE,XTERM);
3552 LOP(OP_FCNTL,XTERM);
3558 LOP(OP_FLOCK,XTERM);
3567 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3570 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3585 case KEY_getpriority:
3586 LOP(OP_GETPRIORITY,XTERM);
3588 case KEY_getprotobyname:
3591 case KEY_getprotobynumber:
3592 LOP(OP_GPBYNUMBER,XTERM);
3594 case KEY_getprotoent:
3606 case KEY_getpeername:
3607 UNI(OP_GETPEERNAME);
3609 case KEY_gethostbyname:
3612 case KEY_gethostbyaddr:
3613 LOP(OP_GHBYADDR,XTERM);
3615 case KEY_gethostent:
3618 case KEY_getnetbyname:
3621 case KEY_getnetbyaddr:
3622 LOP(OP_GNBYADDR,XTERM);
3627 case KEY_getservbyname:
3628 LOP(OP_GSBYNAME,XTERM);
3630 case KEY_getservbyport:
3631 LOP(OP_GSBYPORT,XTERM);
3633 case KEY_getservent:
3636 case KEY_getsockname:
3637 UNI(OP_GETSOCKNAME);
3639 case KEY_getsockopt:
3640 LOP(OP_GSOCKOPT,XTERM);
3662 yylval.ival = PL_curcop->cop_line;
3666 LOP(OP_INDEX,XTERM);
3672 LOP(OP_IOCTL,XTERM);
3684 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3715 LOP(OP_LISTEN,XTERM);
3724 s = scan_pat(s,OP_MATCH);
3725 TERM(sublex_start());
3728 LOP(OP_MAPSTART, XREF);
3731 LOP(OP_MKDIR,XTERM);
3734 LOP(OP_MSGCTL,XTERM);
3737 LOP(OP_MSGGET,XTERM);
3740 LOP(OP_MSGRCV,XTERM);
3743 LOP(OP_MSGSND,XTERM);
3748 if (isIDFIRST_lazy(s)) {
3749 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
3750 PL_in_my_stash = gv_stashpv(PL_tokenbuf, FALSE);
3751 if (!PL_in_my_stash) {
3754 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
3761 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3768 if (PL_expect != XSTATE)
3769 yyerror("\"no\" not allowed in expression");
3770 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3771 s = force_version(s);
3780 if (isIDFIRST_lazy(s)) {
3782 for (d = s; isALNUM_lazy(d); d++) ;
3784 if (strchr("|&*+-=!?:.", *t))
3785 warn("Precedence problem: open %.*s should be open(%.*s)",
3791 yylval.ival = OP_OR;
3801 LOP(OP_OPEN_DIR,XTERM);
3804 checkcomma(s,PL_tokenbuf,"filehandle");
3808 checkcomma(s,PL_tokenbuf,"filehandle");
3827 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3831 LOP(OP_PIPE_OP,XTERM);
3836 missingterm((char*)0);
3837 yylval.ival = OP_CONST;
3838 TERM(sublex_start());
3846 missingterm((char*)0);
3848 if (SvCUR(PL_lex_stuff)) {
3851 d = SvPV_force(PL_lex_stuff, len);
3853 for (; isSPACE(*d) && len; --len, ++d) ;
3856 if (!warned && ckWARN(WARN_SYNTAX)) {
3857 for (; !isSPACE(*d) && len; --len, ++d) {
3860 "Possible attempt to separate words with commas");
3863 else if (*d == '#') {
3865 "Possible attempt to put comments in qw() list");
3871 for (; !isSPACE(*d) && len; --len, ++d) ;
3873 words = append_elem(OP_LIST, words,
3874 newSVOP(OP_CONST, 0, newSVpvn(b, d-b)));
3878 PL_nextval[PL_nexttoke].opval = words;
3883 SvREFCNT_dec(PL_lex_stuff);
3884 PL_lex_stuff = Nullsv;
3891 missingterm((char*)0);
3892 yylval.ival = OP_STRINGIFY;
3893 if (SvIVX(PL_lex_stuff) == '\'')
3894 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
3895 TERM(sublex_start());
3898 s = scan_pat(s,OP_QR);
3899 TERM(sublex_start());
3904 missingterm((char*)0);
3905 yylval.ival = OP_BACKTICK;
3907 TERM(sublex_start());
3913 *PL_tokenbuf = '\0';
3914 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3915 if (isIDFIRST_lazy(PL_tokenbuf))
3916 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
3918 yyerror("<> should be quotes");
3925 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3929 LOP(OP_RENAME,XTERM);
3938 LOP(OP_RINDEX,XTERM);
3961 LOP(OP_REVERSE,XTERM);
3972 TERM(sublex_start());
3974 TOKEN(1); /* force error */
3983 LOP(OP_SELECT,XTERM);
3989 LOP(OP_SEMCTL,XTERM);
3992 LOP(OP_SEMGET,XTERM);
3995 LOP(OP_SEMOP,XTERM);
4001 LOP(OP_SETPGRP,XTERM);
4003 case KEY_setpriority:
4004 LOP(OP_SETPRIORITY,XTERM);
4006 case KEY_sethostent:
4012 case KEY_setservent:
4015 case KEY_setprotoent:
4025 LOP(OP_SEEKDIR,XTERM);
4027 case KEY_setsockopt:
4028 LOP(OP_SSOCKOPT,XTERM);
4034 LOP(OP_SHMCTL,XTERM);
4037 LOP(OP_SHMGET,XTERM);
4040 LOP(OP_SHMREAD,XTERM);
4043 LOP(OP_SHMWRITE,XTERM);
4046 LOP(OP_SHUTDOWN,XTERM);
4055 LOP(OP_SOCKET,XTERM);
4057 case KEY_socketpair:
4058 LOP(OP_SOCKPAIR,XTERM);
4061 checkcomma(s,PL_tokenbuf,"subroutine name");
4063 if (*s == ';' || *s == ')') /* probably a close */
4064 croak("sort is now a reserved word");
4066 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4070 LOP(OP_SPLIT,XTERM);
4073 LOP(OP_SPRINTF,XTERM);
4076 LOP(OP_SPLICE,XTERM);
4092 LOP(OP_SUBSTR,XTERM);
4099 if (isIDFIRST_lazy(s) || *s == '\'' || *s == ':') {
4100 char tmpbuf[sizeof PL_tokenbuf];
4102 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4103 if (strchr(tmpbuf, ':'))
4104 sv_setpv(PL_subname, tmpbuf);
4106 sv_setsv(PL_subname,PL_curstname);
4107 sv_catpvn(PL_subname,"::",2);
4108 sv_catpvn(PL_subname,tmpbuf,len);
4110 s = force_word(s,WORD,FALSE,TRUE,TRUE);
4114 PL_expect = XTERMBLOCK;
4115 sv_setpv(PL_subname,"?");
4118 if (tmp == KEY_format) {
4121 PL_lex_formbrack = PL_lex_brackets + 1;
4125 /* Look for a prototype */
4132 SvREFCNT_dec(PL_lex_stuff);
4133 PL_lex_stuff = Nullsv;
4134 croak("Prototype not terminated");
4137 d = SvPVX(PL_lex_stuff);
4139 for (p = d; *p; ++p) {
4144 SvCUR(PL_lex_stuff) = tmp;
4147 PL_nextval[1] = PL_nextval[0];
4148 PL_nexttype[1] = PL_nexttype[0];
4149 PL_nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4150 PL_nexttype[0] = THING;
4151 if (PL_nexttoke == 1) {
4152 PL_lex_defer = PL_lex_state;
4153 PL_lex_expect = PL_expect;
4154 PL_lex_state = LEX_KNOWNEXT;
4156 PL_lex_stuff = Nullsv;
4159 if (*SvPV(PL_subname,n_a) == '?') {
4160 sv_setpv(PL_subname,"__ANON__");
4167 LOP(OP_SYSTEM,XREF);
4170 LOP(OP_SYMLINK,XTERM);
4173 LOP(OP_SYSCALL,XTERM);
4176 LOP(OP_SYSOPEN,XTERM);
4179 LOP(OP_SYSSEEK,XTERM);
4182 LOP(OP_SYSREAD,XTERM);
4185 LOP(OP_SYSWRITE,XTERM);
4189 TERM(sublex_start());
4210 LOP(OP_TRUNCATE,XTERM);
4222 yylval.ival = PL_curcop->cop_line;
4226 yylval.ival = PL_curcop->cop_line;
4230 LOP(OP_UNLINK,XTERM);
4236 LOP(OP_UNPACK,XTERM);
4239 LOP(OP_UTIME,XTERM);
4242 if (ckWARN(WARN_OCTAL)) {
4243 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4244 if (*d != '0' && isDIGIT(*d))
4245 yywarn("umask: argument is missing initial 0");
4250 LOP(OP_UNSHIFT,XTERM);
4253 if (PL_expect != XSTATE)
4254 yyerror("\"use\" not allowed in expression");
4257 s = force_version(s);
4258 if(*s == ';' || (s = skipspace(s), *s == ';')) {
4259 PL_nextval[PL_nexttoke].opval = Nullop;
4264 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4265 s = force_version(s);
4278 yylval.ival = PL_curcop->cop_line;
4282 PL_hints |= HINT_BLOCK_SCOPE;
4289 LOP(OP_WAITPID,XTERM);
4297 static char ctl_l[2];
4299 if (ctl_l[0] == '\0')
4300 ctl_l[0] = toCTRL('L');
4301 gv_fetchpv(ctl_l,TRUE, SVt_PV);
4304 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
4309 if (PL_expect == XOPERATOR)
4315 yylval.ival = OP_XOR;
4320 TERM(sublex_start());
4326 keyword(register char *d, I32 len)
4331 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
4332 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
4333 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
4334 if (strEQ(d,"__DATA__")) return KEY___DATA__;
4335 if (strEQ(d,"__END__")) return KEY___END__;
4339 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
4344 if (strEQ(d,"and")) return -KEY_and;
4345 if (strEQ(d,"abs")) return -KEY_abs;
4348 if (strEQ(d,"alarm")) return -KEY_alarm;
4349 if (strEQ(d,"atan2")) return -KEY_atan2;
4352 if (strEQ(d,"accept")) return -KEY_accept;
4357 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
4360 if (strEQ(d,"bless")) return -KEY_bless;
4361 if (strEQ(d,"bind")) return -KEY_bind;
4362 if (strEQ(d,"binmode")) return -KEY_binmode;
4365 if (strEQ(d,"CORE")) return -KEY_CORE;
4370 if (strEQ(d,"cmp")) return -KEY_cmp;
4371 if (strEQ(d,"chr")) return -KEY_chr;
4372 if (strEQ(d,"cos")) return -KEY_cos;
4375 if (strEQ(d,"chop")) return KEY_chop;
4378 if (strEQ(d,"close")) return -KEY_close;
4379 if (strEQ(d,"chdir")) return -KEY_chdir;
4380 if (strEQ(d,"chomp")) return KEY_chomp;
4381 if (strEQ(d,"chmod")) return -KEY_chmod;
4382 if (strEQ(d,"chown")) return -KEY_chown;
4383 if (strEQ(d,"crypt")) return -KEY_crypt;
4386 if (strEQ(d,"chroot")) return -KEY_chroot;
4387 if (strEQ(d,"caller")) return -KEY_caller;
4390 if (strEQ(d,"connect")) return -KEY_connect;
4393 if (strEQ(d,"closedir")) return -KEY_closedir;
4394 if (strEQ(d,"continue")) return -KEY_continue;
4399 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
4404 if (strEQ(d,"do")) return KEY_do;
4407 if (strEQ(d,"die")) return -KEY_die;
4410 if (strEQ(d,"dump")) return -KEY_dump;
4413 if (strEQ(d,"delete")) return KEY_delete;
4416 if (strEQ(d,"defined")) return KEY_defined;
4417 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
4420 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
4425 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
4426 if (strEQ(d,"END")) return KEY_END;
4431 if (strEQ(d,"eq")) return -KEY_eq;
4434 if (strEQ(d,"eof")) return -KEY_eof;
4435 if (strEQ(d,"exp")) return -KEY_exp;
4438 if (strEQ(d,"else")) return KEY_else;
4439 if (strEQ(d,"exit")) return -KEY_exit;
4440 if (strEQ(d,"eval")) return KEY_eval;
4441 if (strEQ(d,"exec")) return -KEY_exec;
4442 if (strEQ(d,"each")) return KEY_each;
4445 if (strEQ(d,"elsif")) return KEY_elsif;
4448 if (strEQ(d,"exists")) return KEY_exists;
4449 if (strEQ(d,"elseif")) warn("elseif should be elsif");
4452 if (strEQ(d,"endgrent")) return -KEY_endgrent;
4453 if (strEQ(d,"endpwent")) return -KEY_endpwent;
4456 if (strEQ(d,"endnetent")) return -KEY_endnetent;
4459 if (strEQ(d,"endhostent")) return -KEY_endhostent;
4460 if (strEQ(d,"endservent")) return -KEY_endservent;
4463 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
4470 if (strEQ(d,"for")) return KEY_for;
4473 if (strEQ(d,"fork")) return -KEY_fork;
4476 if (strEQ(d,"fcntl")) return -KEY_fcntl;
4477 if (strEQ(d,"flock")) return -KEY_flock;
4480 if (strEQ(d,"format")) return KEY_format;
4481 if (strEQ(d,"fileno")) return -KEY_fileno;
4484 if (strEQ(d,"foreach")) return KEY_foreach;
4487 if (strEQ(d,"formline")) return -KEY_formline;
4493 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
4494 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4498 if (strnEQ(d,"get",3)) {
4503 if (strEQ(d,"ppid")) return -KEY_getppid;
4504 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4507 if (strEQ(d,"pwent")) return -KEY_getpwent;
4508 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4509 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4512 if (strEQ(d,"peername")) return -KEY_getpeername;
4513 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4514 if (strEQ(d,"priority")) return -KEY_getpriority;
4517 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4520 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4524 else if (*d == 'h') {
4525 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4526 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4527 if (strEQ(d,"hostent")) return -KEY_gethostent;
4529 else if (*d == 'n') {
4530 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4531 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4532 if (strEQ(d,"netent")) return -KEY_getnetent;
4534 else if (*d == 's') {
4535 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4536 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4537 if (strEQ(d,"servent")) return -KEY_getservent;
4538 if (strEQ(d,"sockname")) return -KEY_getsockname;
4539 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4541 else if (*d == 'g') {
4542 if (strEQ(d,"grent")) return -KEY_getgrent;
4543 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4544 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4546 else if (*d == 'l') {
4547 if (strEQ(d,"login")) return -KEY_getlogin;
4549 else if (strEQ(d,"c")) return -KEY_getc;
4554 if (strEQ(d,"gt")) return -KEY_gt;
4555 if (strEQ(d,"ge")) return -KEY_ge;
4558 if (strEQ(d,"grep")) return KEY_grep;
4559 if (strEQ(d,"goto")) return KEY_goto;
4560 if (strEQ(d,"glob")) return KEY_glob;
4563 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4568 if (strEQ(d,"hex")) return -KEY_hex;
4571 if (strEQ(d,"INIT")) return KEY_INIT;
4576 if (strEQ(d,"if")) return KEY_if;
4579 if (strEQ(d,"int")) return -KEY_int;
4582 if (strEQ(d,"index")) return -KEY_index;
4583 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4588 if (strEQ(d,"join")) return -KEY_join;
4592 if (strEQ(d,"keys")) return KEY_keys;
4593 if (strEQ(d,"kill")) return -KEY_kill;
4598 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4599 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4605 if (strEQ(d,"lt")) return -KEY_lt;
4606 if (strEQ(d,"le")) return -KEY_le;
4607 if (strEQ(d,"lc")) return -KEY_lc;
4610 if (strEQ(d,"log")) return -KEY_log;
4613 if (strEQ(d,"last")) return KEY_last;
4614 if (strEQ(d,"link")) return -KEY_link;
4615 if (strEQ(d,"lock")) return -KEY_lock;
4618 if (strEQ(d,"local")) return KEY_local;
4619 if (strEQ(d,"lstat")) return -KEY_lstat;
4622 if (strEQ(d,"length")) return -KEY_length;
4623 if (strEQ(d,"listen")) return -KEY_listen;
4626 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4629 if (strEQ(d,"localtime")) return -KEY_localtime;
4635 case 1: return KEY_m;
4637 if (strEQ(d,"my")) return KEY_my;
4640 if (strEQ(d,"map")) return KEY_map;
4643 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4646 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4647 if (strEQ(d,"msgget")) return -KEY_msgget;
4648 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4649 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4654 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4657 if (strEQ(d,"next")) return KEY_next;
4658 if (strEQ(d,"ne")) return -KEY_ne;
4659 if (strEQ(d,"not")) return -KEY_not;
4660 if (strEQ(d,"no")) return KEY_no;
4665 if (strEQ(d,"or")) return -KEY_or;
4668 if (strEQ(d,"ord")) return -KEY_ord;
4669 if (strEQ(d,"oct")) return -KEY_oct;
4670 if (strEQ(d,"our")) { deprecate("reserved word \"our\"");
4674 if (strEQ(d,"open")) return -KEY_open;
4677 if (strEQ(d,"opendir")) return -KEY_opendir;
4684 if (strEQ(d,"pop")) return KEY_pop;
4685 if (strEQ(d,"pos")) return KEY_pos;
4688 if (strEQ(d,"push")) return KEY_push;
4689 if (strEQ(d,"pack")) return -KEY_pack;
4690 if (strEQ(d,"pipe")) return -KEY_pipe;
4693 if (strEQ(d,"print")) return KEY_print;
4696 if (strEQ(d,"printf")) return KEY_printf;
4699 if (strEQ(d,"package")) return KEY_package;
4702 if (strEQ(d,"prototype")) return KEY_prototype;
4707 if (strEQ(d,"q")) return KEY_q;
4708 if (strEQ(d,"qr")) return KEY_qr;
4709 if (strEQ(d,"qq")) return KEY_qq;
4710 if (strEQ(d,"qw")) return KEY_qw;
4711 if (strEQ(d,"qx")) return KEY_qx;
4713 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4718 if (strEQ(d,"ref")) return -KEY_ref;
4721 if (strEQ(d,"read")) return -KEY_read;
4722 if (strEQ(d,"rand")) return -KEY_rand;
4723 if (strEQ(d,"recv")) return -KEY_recv;
4724 if (strEQ(d,"redo")) return KEY_redo;
4727 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4728 if (strEQ(d,"reset")) return -KEY_reset;
4731 if (strEQ(d,"return")) return KEY_return;
4732 if (strEQ(d,"rename")) return -KEY_rename;
4733 if (strEQ(d,"rindex")) return -KEY_rindex;
4736 if (strEQ(d,"require")) return -KEY_require;
4737 if (strEQ(d,"reverse")) return -KEY_reverse;
4738 if (strEQ(d,"readdir")) return -KEY_readdir;
4741 if (strEQ(d,"readlink")) return -KEY_readlink;
4742 if (strEQ(d,"readline")) return -KEY_readline;
4743 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4746 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4752 case 0: return KEY_s;
4754 if (strEQ(d,"scalar")) return KEY_scalar;
4759 if (strEQ(d,"seek")) return -KEY_seek;
4760 if (strEQ(d,"send")) return -KEY_send;
4763 if (strEQ(d,"semop")) return -KEY_semop;
4766 if (strEQ(d,"select")) return -KEY_select;
4767 if (strEQ(d,"semctl")) return -KEY_semctl;
4768 if (strEQ(d,"semget")) return -KEY_semget;
4771 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4772 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4775 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4776 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4779 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4782 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4783 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4784 if (strEQ(d,"setservent")) return -KEY_setservent;
4787 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4788 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4795 if (strEQ(d,"shift")) return KEY_shift;
4798 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4799 if (strEQ(d,"shmget")) return -KEY_shmget;
4802 if (strEQ(d,"shmread")) return -KEY_shmread;
4805 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4806 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4811 if (strEQ(d,"sin")) return -KEY_sin;
4814 if (strEQ(d,"sleep")) return -KEY_sleep;
4817 if (strEQ(d,"sort")) return KEY_sort;
4818 if (strEQ(d,"socket")) return -KEY_socket;
4819 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4822 if (strEQ(d,"split")) return KEY_split;
4823 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4824 if (strEQ(d,"splice")) return KEY_splice;
4827 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4830 if (strEQ(d,"srand")) return -KEY_srand;
4833 if (strEQ(d,"stat")) return -KEY_stat;
4834 if (strEQ(d,"study")) return KEY_study;
4837 if (strEQ(d,"substr")) return -KEY_substr;
4838 if (strEQ(d,"sub")) return KEY_sub;
4843 if (strEQ(d,"system")) return -KEY_system;
4846 if (strEQ(d,"symlink")) return -KEY_symlink;
4847 if (strEQ(d,"syscall")) return -KEY_syscall;
4848 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4849 if (strEQ(d,"sysread")) return -KEY_sysread;
4850 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4853 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4862 if (strEQ(d,"tr")) return KEY_tr;
4865 if (strEQ(d,"tie")) return KEY_tie;
4868 if (strEQ(d,"tell")) return -KEY_tell;
4869 if (strEQ(d,"tied")) return KEY_tied;
4870 if (strEQ(d,"time")) return -KEY_time;
4873 if (strEQ(d,"times")) return -KEY_times;
4876 if (strEQ(d,"telldir")) return -KEY_telldir;
4879 if (strEQ(d,"truncate")) return -KEY_truncate;
4886 if (strEQ(d,"uc")) return -KEY_uc;
4889 if (strEQ(d,"use")) return KEY_use;
4892 if (strEQ(d,"undef")) return KEY_undef;
4893 if (strEQ(d,"until")) return KEY_until;
4894 if (strEQ(d,"untie")) return KEY_untie;
4895 if (strEQ(d,"utime")) return -KEY_utime;
4896 if (strEQ(d,"umask")) return -KEY_umask;
4899 if (strEQ(d,"unless")) return KEY_unless;
4900 if (strEQ(d,"unpack")) return -KEY_unpack;
4901 if (strEQ(d,"unlink")) return -KEY_unlink;
4904 if (strEQ(d,"unshift")) return KEY_unshift;
4905 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4910 if (strEQ(d,"values")) return -KEY_values;
4911 if (strEQ(d,"vec")) return -KEY_vec;
4916 if (strEQ(d,"warn")) return -KEY_warn;
4917 if (strEQ(d,"wait")) return -KEY_wait;
4920 if (strEQ(d,"while")) return KEY_while;
4921 if (strEQ(d,"write")) return -KEY_write;
4924 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4927 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4932 if (len == 1) return -KEY_x;
4933 if (strEQ(d,"xor")) return -KEY_xor;
4936 if (len == 1) return KEY_y;
4945 checkcomma(register char *s, char *name, char *what)
4949 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4950 dTHR; /* only for ckWARN */
4951 if (ckWARN(WARN_SYNTAX)) {
4953 for (w = s+2; *w && level; w++) {
4960 for (; *w && isSPACE(*w); w++) ;
4961 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4962 warner(WARN_SYNTAX, "%s (...) interpreted as function",name);
4965 while (s < PL_bufend && isSPACE(*s))
4969 while (s < PL_bufend && isSPACE(*s))
4971 if (isIDFIRST_lazy(s)) {
4973 while (isALNUM_lazy(s))
4975 while (s < PL_bufend && isSPACE(*s))
4980 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4984 croak("No comma allowed after %s", what);
4990 new_constant(char *s, STRLEN len, char *key, SV *sv, SV *pv, char *type)
4993 HV *table = GvHV(PL_hintgv); /* ^H */
4996 bool oldcatch = CATCH_GET;
5001 yyerror("%^H is not defined");
5004 cvp = hv_fetch(table, key, strlen(key), FALSE);
5005 if (!cvp || !SvOK(*cvp)) {
5007 sprintf(buf,"$^H{%s} is not defined", key);
5011 sv_2mortal(sv); /* Parent created it permanently */
5014 pv = sv_2mortal(newSVpv(s, len));
5016 typesv = sv_2mortal(newSVpv(type, 0));
5018 typesv = &PL_sv_undef;
5020 Zero(&myop, 1, BINOP);
5021 myop.op_last = (OP *) &myop;
5022 myop.op_next = Nullop;
5023 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
5025 PUSHSTACKi(PERLSI_OVERLOAD);
5028 PL_op = (OP *) &myop;
5029 if (PERLDB_SUB && PL_curstash != PL_debstash)
5030 PL_op->op_private |= OPpENTERSUB_DB;
5041 if (PL_op = pp_entersub(ARGS))
5048 CATCH_SET(oldcatch);
5053 sprintf(buf,"Call to &{$^H{%s}} did not return a defined value", key);
5056 return SvREFCNT_inc(res);
5060 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5062 register char *d = dest;
5063 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5066 croak(ident_too_long);
5067 if (isALNUM(*s)) /* UTF handled below */
5069 else if (*s == '\'' && allow_package && isIDFIRST_lazy(s+1)) {
5074 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5078 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5079 char *t = s + UTF8SKIP(s);
5080 while (*t & 0x80 && is_utf8_mark((U8*)t))
5082 if (d + (t - s) > e)
5083 croak(ident_too_long);
5084 Copy(s, d, t - s, char);
5097 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
5104 if (PL_lex_brackets == 0)
5105 PL_lex_fakebrack = 0;
5109 e = d + destlen - 3; /* two-character token, ending NUL */
5111 while (isDIGIT(*s)) {
5113 croak(ident_too_long);
5120 croak(ident_too_long);
5121 if (isALNUM(*s)) /* UTF handled below */
5123 else if (*s == '\'' && isIDFIRST_lazy(s+1)) {
5128 else if (*s == ':' && s[1] == ':') {
5132 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5133 char *t = s + UTF8SKIP(s);
5134 while (*t & 0x80 && is_utf8_mark((U8*)t))
5136 if (d + (t - s) > e)
5137 croak(ident_too_long);
5138 Copy(s, d, t - s, char);
5149 if (PL_lex_state != LEX_NORMAL)
5150 PL_lex_state = LEX_INTERPENDMAYBE;
5153 if (*s == '$' && s[1] &&
5154 (isALNUM_lazy(s+1) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5167 if (*d == '^' && *s && isCONTROLVAR(*s)) {
5172 if (isSPACE(s[-1])) {
5175 if (ch != ' ' && ch != '\t') {
5181 if (isIDFIRST_lazy(d)) {
5185 while (e < send && isALNUM_lazy(e) || *e == ':') {
5187 while (e < send && *e & 0x80 && is_utf8_mark((U8*)e))
5190 Copy(s, d, e - s, char);
5195 while ((isALNUM(*s) || *s == ':') && d < e)
5198 croak(ident_too_long);
5201 while (s < send && (*s == ' ' || *s == '\t')) s++;
5202 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
5203 dTHR; /* only for ckWARN */
5204 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
5205 char *brack = *s == '[' ? "[...]" : "{...}";
5206 warner(WARN_AMBIGUOUS,
5207 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
5208 funny, dest, brack, funny, dest, brack);
5210 PL_lex_fakebrack = PL_lex_brackets+1;
5212 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
5216 /* Handle extended ${^Foo} variables
5217 * 1999-02-27 mjd-perl-patch@plover.com */
5218 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
5222 while (isALNUM(*s) && d < e) {
5226 croak(ident_too_long);
5231 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
5232 PL_lex_state = LEX_INTERPEND;
5235 if (PL_lex_state == LEX_NORMAL) {
5236 dTHR; /* only for ckWARN */
5237 if (ckWARN(WARN_AMBIGUOUS) &&
5238 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
5240 warner(WARN_AMBIGUOUS,
5241 "Ambiguous use of %c{%s} resolved to %c%s",
5242 funny, dest, funny, dest);
5247 s = bracket; /* let the parser handle it */
5251 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
5252 PL_lex_state = LEX_INTERPEND;
5256 void pmflag(U16 *pmfl, int ch)
5261 *pmfl |= PMf_GLOBAL;
5263 *pmfl |= PMf_CONTINUE;
5267 *pmfl |= PMf_MULTILINE;
5269 *pmfl |= PMf_SINGLELINE;
5271 *pmfl |= PMf_EXTENDED;
5275 scan_pat(char *start, I32 type)
5280 s = scan_str(start);
5283 SvREFCNT_dec(PL_lex_stuff);
5284 PL_lex_stuff = Nullsv;
5285 croak("Search pattern not terminated");
5288 pm = (PMOP*)newPMOP(type, 0);
5289 if (PL_multi_open == '?')
5290 pm->op_pmflags |= PMf_ONCE;
5292 while (*s && strchr("iomsx", *s))
5293 pmflag(&pm->op_pmflags,*s++);
5296 while (*s && strchr("iogcmsx", *s))
5297 pmflag(&pm->op_pmflags,*s++);
5299 pm->op_pmpermflags = pm->op_pmflags;
5301 PL_lex_op = (OP*)pm;
5302 yylval.ival = OP_MATCH;
5307 scan_subst(char *start)
5314 yylval.ival = OP_NULL;
5316 s = scan_str(start);
5320 SvREFCNT_dec(PL_lex_stuff);
5321 PL_lex_stuff = Nullsv;
5322 croak("Substitution pattern not terminated");
5325 if (s[-1] == PL_multi_open)
5328 first_start = PL_multi_start;
5332 SvREFCNT_dec(PL_lex_stuff);
5333 PL_lex_stuff = Nullsv;
5335 SvREFCNT_dec(PL_lex_repl);
5336 PL_lex_repl = Nullsv;
5337 croak("Substitution replacement not terminated");
5339 PL_multi_start = first_start; /* so whole substitution is taken together */
5341 pm = (PMOP*)newPMOP(OP_SUBST, 0);
5347 else if (strchr("iogcmsx", *s))
5348 pmflag(&pm->op_pmflags,*s++);
5355 PL_sublex_info.super_bufptr = s;
5356 PL_sublex_info.super_bufend = PL_bufend;
5358 pm->op_pmflags |= PMf_EVAL;
5359 repl = newSVpv("",0);
5361 sv_catpv(repl, es ? "eval " : "do ");
5362 sv_catpvn(repl, "{ ", 2);
5363 sv_catsv(repl, PL_lex_repl);
5364 sv_catpvn(repl, " };", 2);
5365 SvCOMPILED_on(repl);
5366 SvREFCNT_dec(PL_lex_repl);
5370 pm->op_pmpermflags = pm->op_pmflags;
5371 PL_lex_op = (OP*)pm;
5372 yylval.ival = OP_SUBST;
5377 scan_trans(char *start)
5388 yylval.ival = OP_NULL;
5390 s = scan_str(start);
5393 SvREFCNT_dec(PL_lex_stuff);
5394 PL_lex_stuff = Nullsv;
5395 croak("Transliteration pattern not terminated");
5397 if (s[-1] == PL_multi_open)
5403 SvREFCNT_dec(PL_lex_stuff);
5404 PL_lex_stuff = Nullsv;
5406 SvREFCNT_dec(PL_lex_repl);
5407 PL_lex_repl = Nullsv;
5408 croak("Transliteration replacement not terminated");
5412 o = newSVOP(OP_TRANS, 0, 0);
5413 utf8 = OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF;
5416 New(803,tbl,256,short);
5417 o = newPVOP(OP_TRANS, 0, (char*)tbl);
5421 complement = del = squash = 0;
5422 while (strchr("cdsCU", *s)) {
5424 complement = OPpTRANS_COMPLEMENT;
5426 del = OPpTRANS_DELETE;
5428 squash = OPpTRANS_SQUASH;
5433 utf8 &= ~OPpTRANS_FROM_UTF;
5435 utf8 |= OPpTRANS_FROM_UTF;
5439 utf8 &= ~OPpTRANS_TO_UTF;
5441 utf8 |= OPpTRANS_TO_UTF;
5444 croak("Too many /C and /U options");
5449 o->op_private = del|squash|complement|utf8;
5452 yylval.ival = OP_TRANS;
5457 scan_heredoc(register char *s)
5461 I32 op_type = OP_SCALAR;
5468 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
5472 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
5475 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
5476 if (*peek && strchr("`'\"",*peek)) {
5479 s = delimcpy(d, e, s, PL_bufend, term, &len);
5489 if (!isALNUM_lazy(s))
5490 deprecate("bare << to mean <<\"\"");
5491 for (; isALNUM_lazy(s); s++) {
5496 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
5497 croak("Delimiter for here document is too long");
5500 len = d - PL_tokenbuf;
5501 #ifndef PERL_STRICT_CR
5502 d = strchr(s, '\r');
5506 while (s < PL_bufend) {
5512 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
5521 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
5526 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
5527 herewas = newSVpv(s,PL_bufend-s);
5529 s--, herewas = newSVpv(s,d-s);
5530 s += SvCUR(herewas);
5532 tmpstr = NEWSV(87,79);
5533 sv_upgrade(tmpstr, SVt_PVIV);
5538 else if (term == '`') {
5539 op_type = OP_BACKTICK;
5540 SvIVX(tmpstr) = '\\';
5544 PL_multi_start = PL_curcop->cop_line;
5545 PL_multi_open = PL_multi_close = '<';
5546 term = *PL_tokenbuf;
5547 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
5548 char *bufptr = PL_sublex_info.super_bufptr;
5549 char *bufend = PL_sublex_info.super_bufend;
5550 char *olds = s - SvCUR(herewas);
5551 s = strchr(bufptr, '\n');
5555 while (s < bufend &&
5556 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
5558 PL_curcop->cop_line++;
5561 PL_curcop->cop_line = PL_multi_start;
5562 missingterm(PL_tokenbuf);
5564 sv_setpvn(herewas,bufptr,d-bufptr+1);
5565 sv_setpvn(tmpstr,d+1,s-d);
5567 sv_catpvn(herewas,s,bufend-s);
5568 (void)strcpy(bufptr,SvPVX(herewas));
5575 while (s < PL_bufend &&
5576 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
5578 PL_curcop->cop_line++;
5580 if (s >= PL_bufend) {
5581 PL_curcop->cop_line = PL_multi_start;
5582 missingterm(PL_tokenbuf);
5584 sv_setpvn(tmpstr,d+1,s-d);
5586 PL_curcop->cop_line++; /* the preceding stmt passes a newline */
5588 sv_catpvn(herewas,s,PL_bufend-s);
5589 sv_setsv(PL_linestr,herewas);
5590 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
5591 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5594 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
5595 while (s >= PL_bufend) { /* multiple line string? */
5597 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
5598 PL_curcop->cop_line = PL_multi_start;
5599 missingterm(PL_tokenbuf);
5601 PL_curcop->cop_line++;
5602 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5603 #ifndef PERL_STRICT_CR
5604 if (PL_bufend - PL_linestart >= 2) {
5605 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
5606 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
5608 PL_bufend[-2] = '\n';
5610 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
5612 else if (PL_bufend[-1] == '\r')
5613 PL_bufend[-1] = '\n';
5615 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
5616 PL_bufend[-1] = '\n';
5618 if (PERLDB_LINE && PL_curstash != PL_debstash) {
5619 SV *sv = NEWSV(88,0);
5621 sv_upgrade(sv, SVt_PVMG);
5622 sv_setsv(sv,PL_linestr);
5623 av_store(GvAV(PL_curcop->cop_filegv),
5624 (I32)PL_curcop->cop_line,sv);
5626 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
5629 sv_catsv(PL_linestr,herewas);
5630 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5634 sv_catsv(tmpstr,PL_linestr);
5639 PL_multi_end = PL_curcop->cop_line;
5640 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
5641 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
5642 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
5644 SvREFCNT_dec(herewas);
5645 PL_lex_stuff = tmpstr;
5646 yylval.ival = op_type;
5651 takes: current position in input buffer
5652 returns: new position in input buffer
5653 side-effects: yylval and lex_op are set.
5658 <FH> read from filehandle
5659 <pkg::FH> read from package qualified filehandle
5660 <pkg'FH> read from package qualified filehandle
5661 <$fh> read from filehandle in $fh
5667 scan_inputsymbol(char *start)
5669 register char *s = start; /* current position in buffer */
5674 d = PL_tokenbuf; /* start of temp holding space */
5675 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
5676 s = delimcpy(d, e, s + 1, PL_bufend, '>', &len); /* extract until > */
5678 /* die if we didn't have space for the contents of the <>,
5682 if (len >= sizeof PL_tokenbuf)
5683 croak("Excessively long <> operator");
5685 croak("Unterminated <> operator");
5690 Remember, only scalar variables are interpreted as filehandles by
5691 this code. Anything more complex (e.g., <$fh{$num}>) will be
5692 treated as a glob() call.
5693 This code makes use of the fact that except for the $ at the front,
5694 a scalar variable and a filehandle look the same.
5696 if (*d == '$' && d[1]) d++;
5698 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
5699 while (*d && (isALNUM_lazy(d) || *d == '\'' || *d == ':'))
5702 /* If we've tried to read what we allow filehandles to look like, and
5703 there's still text left, then it must be a glob() and not a getline.
5704 Use scan_str to pull out the stuff between the <> and treat it
5705 as nothing more than a string.
5708 if (d - PL_tokenbuf != len) {
5709 yylval.ival = OP_GLOB;
5711 s = scan_str(start);
5713 croak("Glob not terminated");
5717 /* we're in a filehandle read situation */
5720 /* turn <> into <ARGV> */
5722 (void)strcpy(d,"ARGV");
5724 /* if <$fh>, create the ops to turn the variable into a
5730 /* try to find it in the pad for this block, otherwise find
5731 add symbol table ops
5733 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
5734 OP *o = newOP(OP_PADSV, 0);
5736 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
5739 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
5740 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
5741 newUNOP(OP_RV2SV, 0,
5742 newGVOP(OP_GV, 0, gv)));
5744 PL_lex_op->op_flags |= OPf_SPECIAL;
5745 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
5746 yylval.ival = OP_NULL;
5749 /* If it's none of the above, it must be a literal filehandle
5750 (<Foo::BAR> or <FOO>) so build a simple readline OP */
5752 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
5753 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
5754 yylval.ival = OP_NULL;
5763 takes: start position in buffer
5764 returns: position to continue reading from buffer
5765 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
5766 updates the read buffer.
5768 This subroutine pulls a string out of the input. It is called for:
5769 q single quotes q(literal text)
5770 ' single quotes 'literal text'
5771 qq double quotes qq(interpolate $here please)
5772 " double quotes "interpolate $here please"
5773 qx backticks qx(/bin/ls -l)
5774 ` backticks `/bin/ls -l`
5775 qw quote words @EXPORT_OK = qw( func() $spam )
5776 m// regexp match m/this/
5777 s/// regexp substitute s/this/that/
5778 tr/// string transliterate tr/this/that/
5779 y/// string transliterate y/this/that/
5780 ($*@) sub prototypes sub foo ($)
5781 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
5783 In most of these cases (all but <>, patterns and transliterate)
5784 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
5785 calls scan_str(). s/// makes yylex() call scan_subst() which calls
5786 scan_str(). tr/// and y/// make yylex() call scan_trans() which
5789 It skips whitespace before the string starts, and treats the first
5790 character as the delimiter. If the delimiter is one of ([{< then
5791 the corresponding "close" character )]}> is used as the closing
5792 delimiter. It allows quoting of delimiters, and if the string has
5793 balanced delimiters ([{<>}]) it allows nesting.
5795 The lexer always reads these strings into lex_stuff, except in the
5796 case of the operators which take *two* arguments (s/// and tr///)
5797 when it checks to see if lex_stuff is full (presumably with the 1st
5798 arg to s or tr) and if so puts the string into lex_repl.
5803 scan_str(char *start)
5806 SV *sv; /* scalar value: string */
5807 char *tmps; /* temp string, used for delimiter matching */
5808 register char *s = start; /* current position in the buffer */
5809 register char term; /* terminating character */
5810 register char *to; /* current position in the sv's data */
5811 I32 brackets = 1; /* bracket nesting level */
5813 /* skip space before the delimiter */
5817 /* mark where we are, in case we need to report errors */
5820 /* after skipping whitespace, the next character is the terminator */
5822 /* mark where we are */
5823 PL_multi_start = PL_curcop->cop_line;
5824 PL_multi_open = term;
5826 /* find corresponding closing delimiter */
5827 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
5829 PL_multi_close = term;
5831 /* create a new SV to hold the contents. 87 is leak category, I'm
5832 assuming. 79 is the SV's initial length. What a random number. */
5834 sv_upgrade(sv, SVt_PVIV);
5836 (void)SvPOK_only(sv); /* validate pointer */
5838 /* move past delimiter and try to read a complete string */
5841 /* extend sv if need be */
5842 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
5843 /* set 'to' to the next character in the sv's string */
5844 to = SvPVX(sv)+SvCUR(sv);
5846 /* if open delimiter is the close delimiter read unbridle */
5847 if (PL_multi_open == PL_multi_close) {
5848 for (; s < PL_bufend; s++,to++) {
5849 /* embedded newlines increment the current line number */
5850 if (*s == '\n' && !PL_rsfp)
5851 PL_curcop->cop_line++;
5852 /* handle quoted delimiters */
5853 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
5856 /* any other quotes are simply copied straight through */
5860 /* terminate when run out of buffer (the for() condition), or
5861 have found the terminator */
5862 else if (*s == term)
5868 /* if the terminator isn't the same as the start character (e.g.,
5869 matched brackets), we have to allow more in the quoting, and
5870 be prepared for nested brackets.
5873 /* read until we run out of string, or we find the terminator */
5874 for (; s < PL_bufend; s++,to++) {
5875 /* embedded newlines increment the line count */
5876 if (*s == '\n' && !PL_rsfp)
5877 PL_curcop->cop_line++;
5878 /* backslashes can escape the open or closing characters */
5879 if (*s == '\\' && s+1 < PL_bufend) {
5880 if ((s[1] == PL_multi_open) || (s[1] == PL_multi_close))
5885 /* allow nested opens and closes */
5886 else if (*s == PL_multi_close && --brackets <= 0)
5888 else if (*s == PL_multi_open)
5893 /* terminate the copied string and update the sv's end-of-string */
5895 SvCUR_set(sv, to - SvPVX(sv));
5898 * this next chunk reads more into the buffer if we're not done yet
5901 if (s < PL_bufend) break; /* handle case where we are done yet :-) */
5903 #ifndef PERL_STRICT_CR
5904 if (to - SvPVX(sv) >= 2) {
5905 if ((to[-2] == '\r' && to[-1] == '\n') ||
5906 (to[-2] == '\n' && to[-1] == '\r'))
5910 SvCUR_set(sv, to - SvPVX(sv));
5912 else if (to[-1] == '\r')
5915 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
5919 /* if we're out of file, or a read fails, bail and reset the current
5920 line marker so we can report where the unterminated string began
5923 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
5925 PL_curcop->cop_line = PL_multi_start;
5928 /* we read a line, so increment our line counter */
5929 PL_curcop->cop_line++;
5931 /* update debugger info */
5932 if (PERLDB_LINE && PL_curstash != PL_debstash) {
5933 SV *sv = NEWSV(88,0);
5935 sv_upgrade(sv, SVt_PVMG);
5936 sv_setsv(sv,PL_linestr);
5937 av_store(GvAV(PL_curcop->cop_filegv),
5938 (I32)PL_curcop->cop_line, sv);
5941 /* having changed the buffer, we must update PL_bufend */
5942 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5945 /* at this point, we have successfully read the delimited string */
5947 PL_multi_end = PL_curcop->cop_line;
5950 /* if we allocated too much space, give some back */
5951 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5952 SvLEN_set(sv, SvCUR(sv) + 1);
5953 Renew(SvPVX(sv), SvLEN(sv), char);
5956 /* decide whether this is the first or second quoted string we've read
5969 takes: pointer to position in buffer
5970 returns: pointer to new position in buffer
5971 side-effects: builds ops for the constant in yylval.op
5973 Read a number in any of the formats that Perl accepts:
5975 0(x[0-7A-F]+)|([0-7]+)|(b[01])
5976 [\d_]+(\.[\d_]*)?[Ee](\d+)
5978 Underbars (_) are allowed in decimal numbers. If -w is on,
5979 underbars before a decimal point must be at three digit intervals.
5981 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
5984 If it reads a number without a decimal point or an exponent, it will
5985 try converting the number to an integer and see if it can do so
5986 without loss of precision.
5990 scan_num(char *start)
5992 register char *s = start; /* current position in buffer */
5993 register char *d; /* destination in temp buffer */
5994 register char *e; /* end of temp buffer */
5995 I32 tryiv; /* used to see if it can be an int */
5996 double value; /* number read, as a double */
5997 SV *sv; /* place to put the converted number */
5998 I32 floatit; /* boolean: int or float? */
5999 char *lastub = 0; /* position of last underbar */
6000 static char number_too_long[] = "Number too long";
6002 /* We use the first character to decide what type of number this is */
6006 croak("panic: scan_num");
6008 /* if it starts with a 0, it could be an octal number, a decimal in
6009 0.13 disguise, or a hexadecimal number, or a binary number.
6014 u holds the "number so far"
6015 shift the power of 2 of the base
6016 (hex == 4, octal == 3, binary == 1)
6017 overflowed was the number more than we can hold?
6019 Shift is used when we add a digit. It also serves as an "are
6020 we in octal/hex/binary?" indicator to disallow hex characters
6025 bool overflowed = FALSE;
6031 } else if (s[1] == 'b') {
6035 /* check for a decimal in disguise */
6036 else if (s[1] == '.')
6038 /* so it must be octal */
6043 /* read the rest of the number */
6045 UV n, b; /* n is used in the overflow test, b is the digit we're adding on */
6049 /* if we don't mention it, we're done */
6058 /* 8 and 9 are not octal */
6061 yyerror(form("Illegal octal digit '%c'", *s));
6064 yyerror(form("Illegal binary digit '%c'", *s));
6068 case '2': case '3': case '4':
6069 case '5': case '6': case '7':
6071 yyerror(form("Illegal binary digit '%c'", *s));
6075 b = *s++ & 15; /* ASCII digit -> value of digit */
6079 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6080 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6081 /* make sure they said 0x */
6086 /* Prepare to put the digit we have onto the end
6087 of the number so far. We check for overflows.
6091 n = u << shift; /* make room for the digit */
6092 if (!overflowed && (n >> shift) != u
6093 && !(PL_hints & HINT_NEW_BINARY)) {
6094 warn("Integer overflow in %s number",
6095 (shift == 4) ? "hex"
6096 : ((shift == 3) ? "octal" : "binary"));
6099 u = n | b; /* add the digit to the end */
6104 /* if we get here, we had success: make a scalar value from
6110 if ( PL_hints & HINT_NEW_BINARY)
6111 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
6116 handle decimal numbers.
6117 we're also sent here when we read a 0 as the first digit
6119 case '1': case '2': case '3': case '4': case '5':
6120 case '6': case '7': case '8': case '9': case '.':
6123 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
6126 /* read next group of digits and _ and copy into d */
6127 while (isDIGIT(*s) || *s == '_') {
6128 /* skip underscores, checking for misplaced ones
6132 dTHR; /* only for ckWARN */
6133 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
6134 warner(WARN_SYNTAX, "Misplaced _ in number");
6138 /* check for end of fixed-length buffer */
6140 croak(number_too_long);
6141 /* if we're ok, copy the character */
6146 /* final misplaced underbar check */
6147 if (lastub && s - lastub != 3) {
6149 if (ckWARN(WARN_SYNTAX))
6150 warner(WARN_SYNTAX, "Misplaced _ in number");
6153 /* read a decimal portion if there is one. avoid
6154 3..5 being interpreted as the number 3. followed
6157 if (*s == '.' && s[1] != '.') {
6161 /* copy, ignoring underbars, until we run out of
6162 digits. Note: no misplaced underbar checks!
6164 for (; isDIGIT(*s) || *s == '_'; s++) {
6165 /* fixed length buffer check */
6167 croak(number_too_long);
6173 /* read exponent part, if present */
6174 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
6178 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
6179 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
6181 /* allow positive or negative exponent */
6182 if (*s == '+' || *s == '-')
6185 /* read digits of exponent (no underbars :-) */
6186 while (isDIGIT(*s)) {
6188 croak(number_too_long);
6193 /* terminate the string */
6196 /* make an sv from the string */
6198 /* reset numeric locale in case we were earlier left in Swaziland */
6199 SET_NUMERIC_STANDARD();
6200 value = atof(PL_tokenbuf);
6203 See if we can make do with an integer value without loss of
6204 precision. We use I_V to cast to an int, because some
6205 compilers have issues. Then we try casting it back and see
6206 if it was the same. We only do this if we know we
6207 specifically read an integer.
6209 Note: if floatit is true, then we don't need to do the
6213 if (!floatit && (double)tryiv == value)
6214 sv_setiv(sv, tryiv);
6216 sv_setnv(sv, value);
6217 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) : (PL_hints & HINT_NEW_INTEGER) )
6218 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
6219 (floatit ? "float" : "integer"), sv, Nullsv, NULL);
6223 /* make the op for the constant and return */
6225 yylval.opval = newSVOP(OP_CONST, 0, sv);
6231 scan_formline(register char *s)
6236 SV *stuff = newSVpv("",0);
6237 bool needargs = FALSE;
6240 if (*s == '.' || *s == '}') {
6242 #ifdef PERL_STRICT_CR
6243 for (t = s+1;*t == ' ' || *t == '\t'; t++) ;
6245 for (t = s+1;*t == ' ' || *t == '\t' || *t == '\r'; t++) ;
6247 if (*t == '\n' || t == PL_bufend)
6250 if (PL_in_eval && !PL_rsfp) {
6251 eol = strchr(s,'\n');
6256 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6258 for (t = s; t < eol; t++) {
6259 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
6261 goto enough; /* ~~ must be first line in formline */
6263 if (*t == '@' || *t == '^')
6266 sv_catpvn(stuff, s, eol-s);
6270 s = filter_gets(PL_linestr, PL_rsfp, 0);
6271 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
6272 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
6275 yyerror("Format not terminated");
6285 PL_lex_state = LEX_NORMAL;
6286 PL_nextval[PL_nexttoke].ival = 0;
6290 PL_lex_state = LEX_FORMLINE;
6291 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
6293 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
6297 SvREFCNT_dec(stuff);
6298 PL_lex_formbrack = 0;
6309 PL_cshlen = strlen(PL_cshname);
6314 start_subparse(I32 is_format, U32 flags)
6317 I32 oldsavestack_ix = PL_savestack_ix;
6318 CV* outsidecv = PL_compcv;
6322 assert(SvTYPE(PL_compcv) == SVt_PVCV);
6324 save_I32(&PL_subline);
6325 save_item(PL_subname);
6327 SAVESPTR(PL_curpad);
6328 SAVESPTR(PL_comppad);
6329 SAVESPTR(PL_comppad_name);
6330 SAVESPTR(PL_compcv);
6331 SAVEI32(PL_comppad_name_fill);
6332 SAVEI32(PL_min_intro_pending);
6333 SAVEI32(PL_max_intro_pending);
6334 SAVEI32(PL_pad_reset_pending);
6336 PL_compcv = (CV*)NEWSV(1104,0);
6337 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
6338 CvFLAGS(PL_compcv) |= flags;
6340 PL_comppad = newAV();
6341 av_push(PL_comppad, Nullsv);
6342 PL_curpad = AvARRAY(PL_comppad);
6343 PL_comppad_name = newAV();
6344 PL_comppad_name_fill = 0;
6345 PL_min_intro_pending = 0;
6347 PL_subline = PL_curcop->cop_line;
6349 av_store(PL_comppad_name, 0, newSVpv("@_", 2));
6350 PL_curpad[0] = (SV*)newAV();
6351 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
6352 #endif /* USE_THREADS */
6354 comppadlist = newAV();
6355 AvREAL_off(comppadlist);
6356 av_store(comppadlist, 0, (SV*)PL_comppad_name);
6357 av_store(comppadlist, 1, (SV*)PL_comppad);
6359 CvPADLIST(PL_compcv) = comppadlist;
6360 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
6362 CvOWNER(PL_compcv) = 0;
6363 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
6364 MUTEX_INIT(CvMUTEXP(PL_compcv));
6365 #endif /* USE_THREADS */
6367 return oldsavestack_ix;
6386 char *context = NULL;
6390 if (!yychar || (yychar == ';' && !PL_rsfp))
6392 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
6393 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
6394 while (isSPACE(*PL_oldoldbufptr))
6396 context = PL_oldoldbufptr;
6397 contlen = PL_bufptr - PL_oldoldbufptr;
6399 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
6400 PL_oldbufptr != PL_bufptr) {
6401 while (isSPACE(*PL_oldbufptr))
6403 context = PL_oldbufptr;
6404 contlen = PL_bufptr - PL_oldbufptr;
6406 else if (yychar > 255)
6407 where = "next token ???";
6408 else if ((yychar & 127) == 127) {
6409 if (PL_lex_state == LEX_NORMAL ||
6410 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
6411 where = "at end of line";
6412 else if (PL_lex_inpat)
6413 where = "within pattern";
6415 where = "within string";
6418 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
6420 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
6421 else if (isPRINT_LC(yychar))
6422 sv_catpvf(where_sv, "%c", yychar);
6424 sv_catpvf(where_sv, "\\%03o", yychar & 255);
6425 where = SvPVX(where_sv);
6427 msg = sv_2mortal(newSVpv(s, 0));
6428 sv_catpvf(msg, " at %_ line %ld, ",
6429 GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
6431 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
6433 sv_catpvf(msg, "%s\n", where);
6434 if (PL_multi_start < PL_multi_end && (U32)(PL_curcop->cop_line - PL_multi_end) <= 1) {
6436 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
6437 (int)PL_multi_open,(int)PL_multi_close,(long)PL_multi_start);
6442 else if (PL_in_eval)
6443 sv_catsv(ERRSV, msg);
6445 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
6446 if (++PL_error_count >= 10)
6447 croak("%_ has too many errors.\n", GvSV(PL_curcop->cop_filegv));
6449 PL_in_my_stash = Nullhv;