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 = newSVpvn("\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(newSVpvn(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 = newSVpvn(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, newSVpvn("",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 (SvEVALED(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 $1
899 The structure of the code is
900 while (there's a character to process) {
901 handle transliteration ranges
903 skip # initiated comments in //x patterns
904 check for embedded @foo
905 check for embedded scalars
907 leave intact backslashes from leave (below)
908 deprecate \1 in strings and sub replacements
909 handle string-changing backslashes \l \U \Q \E, etc.
910 switch (what was escaped) {
911 handle - in a transliteration (becomes a literal -)
912 handle \132 octal characters
913 handle 0x15 hex characters
914 handle \cV (control V)
915 handle printf backslashes (\f, \r, \n, etc)
918 } (end while character to read)
923 scan_const(char *start)
925 register char *send = PL_bufend; /* end of the constant */
926 SV *sv = NEWSV(93, send - start); /* sv for the constant */
927 register char *s = start; /* start of the constant */
928 register char *d = SvPVX(sv); /* destination for copies */
929 bool dorange = FALSE; /* are we in a translit range? */
931 I32 utf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
932 ? (PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
934 I32 thisutf = (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op)
935 ? (PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF))
938 /* leaveit is the set of acceptably-backslashed characters */
941 ? "\\.^$@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,
1414 newSVpvn(tmpbuf,len));
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 IoDIRP(FILTER_DATA(AvFILLp(PL_rsfp_filters))) = NULL;
1491 sv_free(av_pop(PL_rsfp_filters));
1495 /* we need to search for the correct entry and clear it */
1496 die("filter_del can only delete in reverse order (currently)");
1500 /* Invoke the n'th filter function for the current rsfp. */
1502 filter_read(int idx, SV *buf_sv, int maxlen)
1505 /* 0 = read one text line */
1510 if (!PL_rsfp_filters)
1512 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
1513 /* Provide a default input filter to make life easy. */
1514 /* Note that we append to the line. This is handy. */
1515 if (PL_filter_debug)
1516 warn("filter_read %d: from rsfp\n", idx);
1520 int old_len = SvCUR(buf_sv) ;
1522 /* ensure buf_sv is large enough */
1523 SvGROW(buf_sv, old_len + maxlen) ;
1524 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1525 if (PerlIO_error(PL_rsfp))
1526 return -1; /* error */
1528 return 0 ; /* end of file */
1530 SvCUR_set(buf_sv, old_len + len) ;
1533 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
1534 if (PerlIO_error(PL_rsfp))
1535 return -1; /* error */
1537 return 0 ; /* end of file */
1540 return SvCUR(buf_sv);
1542 /* Skip this filter slot if filter has been deleted */
1543 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
1544 if (PL_filter_debug)
1545 warn("filter_read %d: skipped (filter deleted)\n", idx);
1546 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1548 /* Get function pointer hidden within datasv */
1549 funcp = (filter_t)IoDIRP(datasv);
1550 if (PL_filter_debug) {
1552 warn("filter_read %d: via function %p (%s)\n",
1553 idx, funcp, SvPV(datasv,n_a));
1555 /* Call function. The function is expected to */
1556 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1557 /* Return: <0:error, =0:eof, >0:not eof */
1558 return (*funcp)(PERL_OBJECT_THIS_ idx, buf_sv, maxlen);
1562 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1565 if (!PL_rsfp_filters) {
1566 filter_add(win32_textfilter,NULL);
1569 if (PL_rsfp_filters) {
1572 SvCUR_set(sv, 0); /* start with empty line */
1573 if (FILTER_READ(0, sv, 0) > 0)
1574 return ( SvPVX(sv) ) ;
1579 return (sv_gets(sv, fp, append));
1584 static char* exp_name[] =
1585 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1591 Works out what to call the token just pulled out of the input
1592 stream. The yacc parser takes care of taking the ops we return and
1593 stitching them into a tree.
1599 if read an identifier
1600 if we're in a my declaration
1601 croak if they tried to say my($foo::bar)
1602 build the ops for a my() declaration
1603 if it's an access to a my() variable
1604 are we in a sort block?
1605 croak if my($a); $a <=> $b
1606 build ops for access to a my() variable
1607 if in a dq string, and they've said @foo and we can't find @foo
1609 build ops for a bareword
1610 if we already built the token before, use it.
1613 int yylex(PERL_YYLEX_PARAM_DECL)
1623 #ifdef USE_PURE_BISON
1624 yylval_pointer = lvalp;
1625 yychar_pointer = lcharp;
1628 /* check if there's an identifier for us to look at */
1629 if (PL_pending_ident) {
1630 /* pit holds the identifier we read and pending_ident is reset */
1631 char pit = PL_pending_ident;
1632 PL_pending_ident = 0;
1634 /* if we're in a my(), we can't allow dynamics here.
1635 $foo'bar has already been turned into $foo::bar, so
1636 just check for colons.
1638 if it's a legal name, the OP is a PADANY.
1641 if (strchr(PL_tokenbuf,':'))
1642 yyerror(form(PL_no_myglob,PL_tokenbuf));
1644 yylval.opval = newOP(OP_PADANY, 0);
1645 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
1650 build the ops for accesses to a my() variable.
1652 Deny my($a) or my($b) in a sort block, *if* $a or $b is
1653 then used in a comparison. This catches most, but not
1654 all cases. For instance, it catches
1655 sort { my($a); $a <=> $b }
1657 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
1658 (although why you'd do that is anyone's guess).
1661 if (!strchr(PL_tokenbuf,':')) {
1663 /* Check for single character per-thread SVs */
1664 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
1665 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
1666 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
1668 yylval.opval = newOP(OP_THREADSV, 0);
1669 yylval.opval->op_targ = tmp;
1672 #endif /* USE_THREADS */
1673 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
1674 /* if it's a sort block and they're naming $a or $b */
1675 if (PL_last_lop_op == OP_SORT &&
1676 PL_tokenbuf[0] == '$' &&
1677 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
1680 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
1681 d < PL_bufend && *d != '\n';
1684 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1685 croak("Can't use \"my %s\" in sort comparison",
1691 yylval.opval = newOP(OP_PADANY, 0);
1692 yylval.opval->op_targ = tmp;
1698 Whine if they've said @foo in a doublequoted string,
1699 and @foo isn't a variable we can find in the symbol
1702 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
1703 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
1704 if (!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1705 yyerror(form("In string, %s now must be written as \\%s",
1706 PL_tokenbuf, PL_tokenbuf));
1709 /* build ops for a bareword */
1710 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
1711 yylval.opval->op_private = OPpCONST_ENTERED;
1712 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
1713 ((PL_tokenbuf[0] == '$') ? SVt_PV
1714 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
1719 /* no identifier pending identification */
1721 switch (PL_lex_state) {
1723 case LEX_NORMAL: /* Some compilers will produce faster */
1724 case LEX_INTERPNORMAL: /* code if we comment these out. */
1728 /* when we're already built the next token, just pull it out the queue */
1731 yylval = PL_nextval[PL_nexttoke];
1733 PL_lex_state = PL_lex_defer;
1734 PL_expect = PL_lex_expect;
1735 PL_lex_defer = LEX_NORMAL;
1737 return(PL_nexttype[PL_nexttoke]);
1739 /* interpolated case modifiers like \L \U, including \Q and \E.
1740 when we get here, PL_bufptr is at the \
1742 case LEX_INTERPCASEMOD:
1744 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
1745 croak("panic: INTERPCASEMOD");
1747 /* handle \E or end of string */
1748 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
1752 if (PL_lex_casemods) {
1753 oldmod = PL_lex_casestack[--PL_lex_casemods];
1754 PL_lex_casestack[PL_lex_casemods] = '\0';
1756 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
1758 PL_lex_state = LEX_INTERPCONCAT;
1762 if (PL_bufptr != PL_bufend)
1764 PL_lex_state = LEX_INTERPCONCAT;
1765 return yylex(PERL_YYLEX_PARAM);
1769 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1770 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1771 if (strchr("LU", *s) &&
1772 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
1774 PL_lex_casestack[--PL_lex_casemods] = '\0';
1777 if (PL_lex_casemods > 10) {
1778 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
1779 if (newlb != PL_lex_casestack) {
1781 PL_lex_casestack = newlb;
1784 PL_lex_casestack[PL_lex_casemods++] = *s;
1785 PL_lex_casestack[PL_lex_casemods] = '\0';
1786 PL_lex_state = LEX_INTERPCONCAT;
1787 PL_nextval[PL_nexttoke].ival = 0;
1790 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
1792 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
1794 PL_nextval[PL_nexttoke].ival = OP_LC;
1796 PL_nextval[PL_nexttoke].ival = OP_UC;
1798 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
1800 croak("panic: yylex");
1803 if (PL_lex_starts) {
1809 return yylex(PERL_YYLEX_PARAM);
1812 case LEX_INTERPPUSH:
1813 return sublex_push();
1815 case LEX_INTERPSTART:
1816 if (PL_bufptr == PL_bufend)
1817 return sublex_done();
1819 PL_lex_dojoin = (*PL_bufptr == '@');
1820 PL_lex_state = LEX_INTERPNORMAL;
1821 if (PL_lex_dojoin) {
1822 PL_nextval[PL_nexttoke].ival = 0;
1825 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
1826 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
1827 force_next(PRIVATEREF);
1829 force_ident("\"", '$');
1830 #endif /* USE_THREADS */
1831 PL_nextval[PL_nexttoke].ival = 0;
1833 PL_nextval[PL_nexttoke].ival = 0;
1835 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1838 if (PL_lex_starts++) {
1842 return yylex(PERL_YYLEX_PARAM);
1844 case LEX_INTERPENDMAYBE:
1845 if (intuit_more(PL_bufptr)) {
1846 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1852 if (PL_lex_dojoin) {
1853 PL_lex_dojoin = FALSE;
1854 PL_lex_state = LEX_INTERPCONCAT;
1857 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
1858 && SvEVALED(PL_lex_repl))
1860 if (PL_bufptr != PL_bufend)
1861 croak("Bad evalled substitution pattern");
1862 PL_lex_repl = Nullsv;
1865 case LEX_INTERPCONCAT:
1867 if (PL_lex_brackets)
1868 croak("panic: INTERPCONCAT");
1870 if (PL_bufptr == PL_bufend)
1871 return sublex_done();
1873 if (SvIVX(PL_linestr) == '\'') {
1874 SV *sv = newSVsv(PL_linestr);
1877 else if ( PL_hints & HINT_NEW_RE )
1878 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
1879 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1883 s = scan_const(PL_bufptr);
1885 PL_lex_state = LEX_INTERPCASEMOD;
1887 PL_lex_state = LEX_INTERPSTART;
1890 if (s != PL_bufptr) {
1891 PL_nextval[PL_nexttoke] = yylval;
1894 if (PL_lex_starts++)
1898 return yylex(PERL_YYLEX_PARAM);
1902 return yylex(PERL_YYLEX_PARAM);
1904 PL_lex_state = LEX_NORMAL;
1905 s = scan_formline(PL_bufptr);
1906 if (!PL_lex_formbrack)
1912 PL_oldoldbufptr = PL_oldbufptr;
1915 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[PL_expect], s);
1921 if (isIDFIRST_lazy(s))
1923 croak("Unrecognized character \\x%02X", *s & 255);
1926 goto fake_eof; /* emulate EOF on ^D or ^Z */
1931 if (PL_lex_brackets)
1932 yyerror("Missing right curly or square bracket");
1935 if (s++ < PL_bufend)
1936 goto retry; /* ignore stray nulls */
1939 if (!PL_in_eval && !PL_preambled) {
1940 PL_preambled = TRUE;
1941 sv_setpv(PL_linestr,incl_perldb());
1942 if (SvCUR(PL_linestr))
1943 sv_catpv(PL_linestr,";");
1945 while(AvFILLp(PL_preambleav) >= 0) {
1946 SV *tmpsv = av_shift(PL_preambleav);
1947 sv_catsv(PL_linestr, tmpsv);
1948 sv_catpv(PL_linestr, ";");
1951 sv_free((SV*)PL_preambleav);
1952 PL_preambleav = NULL;
1954 if (PL_minus_n || PL_minus_p) {
1955 sv_catpv(PL_linestr, "LINE: while (<>) {");
1957 sv_catpv(PL_linestr,"chomp;");
1959 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1961 GvIMPORTED_AV_on(gv);
1963 if (strchr("/'\"", *PL_splitstr)
1964 && strchr(PL_splitstr + 1, *PL_splitstr))
1965 sv_catpvf(PL_linestr, "@F=split(%s);", PL_splitstr);
1968 s = "'~#\200\1'"; /* surely one char is unused...*/
1969 while (s[1] && strchr(PL_splitstr, *s)) s++;
1971 sv_catpvf(PL_linestr, "@F=split(%s%c",
1972 "q" + (delim == '\''), delim);
1973 for (s = PL_splitstr; *s; s++) {
1975 sv_catpvn(PL_linestr, "\\", 1);
1976 sv_catpvn(PL_linestr, s, 1);
1978 sv_catpvf(PL_linestr, "%c);", delim);
1982 sv_catpv(PL_linestr,"@F=split(' ');");
1985 sv_catpv(PL_linestr, "\n");
1986 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
1987 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
1988 if (PERLDB_LINE && PL_curstash != PL_debstash) {
1989 SV *sv = NEWSV(85,0);
1991 sv_upgrade(sv, SVt_PVMG);
1992 sv_setsv(sv,PL_linestr);
1993 av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
1998 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2001 if (PL_preprocess && !PL_in_eval)
2002 (void)PerlProc_pclose(PL_rsfp);
2003 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2004 PerlIO_clearerr(PL_rsfp);
2006 (void)PerlIO_close(PL_rsfp);
2008 PL_doextract = FALSE;
2010 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2011 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2012 sv_catpv(PL_linestr,";}");
2013 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2014 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2015 PL_minus_n = PL_minus_p = 0;
2018 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2019 sv_setpv(PL_linestr,"");
2020 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2023 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
2024 PL_doextract = FALSE;
2026 /* Incest with pod. */
2027 if (*s == '=' && strnEQ(s, "=cut", 4)) {
2028 sv_setpv(PL_linestr, "");
2029 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2030 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2031 PL_doextract = FALSE;
2035 } while (PL_doextract);
2036 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2037 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2038 SV *sv = NEWSV(85,0);
2040 sv_upgrade(sv, SVt_PVMG);
2041 sv_setsv(sv,PL_linestr);
2042 av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
2044 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2045 if (PL_curcop->cop_line == 1) {
2046 while (s < PL_bufend && isSPACE(*s))
2048 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
2052 if (*s == '#' && *(s+1) == '!')
2054 #ifdef ALTERNATE_SHEBANG
2056 static char as[] = ALTERNATE_SHEBANG;
2057 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2058 d = s + (sizeof(as) - 1);
2060 #endif /* ALTERNATE_SHEBANG */
2069 while (*d && !isSPACE(*d))
2073 #ifdef ARG_ZERO_IS_SCRIPT
2074 if (ipathend > ipath) {
2076 * HP-UX (at least) sets argv[0] to the script name,
2077 * which makes $^X incorrect. And Digital UNIX and Linux,
2078 * at least, set argv[0] to the basename of the Perl
2079 * interpreter. So, having found "#!", we'll set it right.
2081 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2082 assert(SvPOK(x) || SvGMAGICAL(x));
2083 if (sv_eq(x, GvSV(PL_curcop->cop_filegv))) {
2084 sv_setpvn(x, ipath, ipathend - ipath);
2087 TAINT_NOT; /* $^X is always tainted, but that's OK */
2089 #endif /* ARG_ZERO_IS_SCRIPT */
2094 d = instr(s,"perl -");
2096 d = instr(s,"perl");
2097 #ifdef ALTERNATE_SHEBANG
2099 * If the ALTERNATE_SHEBANG on this system starts with a
2100 * character that can be part of a Perl expression, then if
2101 * we see it but not "perl", we're probably looking at the
2102 * start of Perl code, not a request to hand off to some
2103 * other interpreter. Similarly, if "perl" is there, but
2104 * not in the first 'word' of the line, we assume the line
2105 * contains the start of the Perl program.
2107 if (d && *s != '#') {
2109 while (*c && !strchr("; \t\r\n\f\v#", *c))
2112 d = Nullch; /* "perl" not in first word; ignore */
2114 *s = '#'; /* Don't try to parse shebang line */
2116 #endif /* ALTERNATE_SHEBANG */
2121 !instr(s,"indir") &&
2122 instr(PL_origargv[0],"perl"))
2128 while (s < PL_bufend && isSPACE(*s))
2130 if (s < PL_bufend) {
2131 Newz(899,newargv,PL_origargc+3,char*);
2133 while (s < PL_bufend && !isSPACE(*s))
2136 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
2139 newargv = PL_origargv;
2141 PerlProc_execv(ipath, newargv);
2142 croak("Can't exec %s", ipath);
2145 U32 oldpdb = PL_perldb;
2146 bool oldn = PL_minus_n;
2147 bool oldp = PL_minus_p;
2149 while (*d && !isSPACE(*d)) d++;
2150 while (*d == ' ' || *d == '\t') d++;
2154 if (*d == 'M' || *d == 'm') {
2156 while (*d && !isSPACE(*d)) d++;
2157 croak("Too late for \"-%.*s\" option",
2160 d = moreswitches(d);
2162 if (PERLDB_LINE && !oldpdb ||
2163 ( PL_minus_n || PL_minus_p ) && !(oldn || oldp) )
2164 /* if we have already added "LINE: while (<>) {",
2165 we must not do it again */
2167 sv_setpv(PL_linestr, "");
2168 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2169 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
2170 PL_preambled = FALSE;
2172 (void)gv_fetchfile(PL_origfilename);
2179 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2181 PL_lex_state = LEX_FORMLINE;
2182 return yylex(PERL_YYLEX_PARAM);
2186 #ifdef PERL_STRICT_CR
2187 warn("Illegal character \\%03o (carriage return)", '\r');
2189 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
2191 case ' ': case '\t': case '\f': case 013:
2196 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
2198 while (s < d && *s != '\n')
2203 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2205 PL_lex_state = LEX_FORMLINE;
2206 return yylex(PERL_YYLEX_PARAM);
2215 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
2220 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2223 if (strnEQ(s,"=>",2)) {
2224 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
2225 OPERATOR('-'); /* unary minus */
2227 PL_last_uni = PL_oldbufptr;
2228 PL_last_lop_op = OP_FTEREAD; /* good enough */
2230 case 'r': FTST(OP_FTEREAD);
2231 case 'w': FTST(OP_FTEWRITE);
2232 case 'x': FTST(OP_FTEEXEC);
2233 case 'o': FTST(OP_FTEOWNED);
2234 case 'R': FTST(OP_FTRREAD);
2235 case 'W': FTST(OP_FTRWRITE);
2236 case 'X': FTST(OP_FTREXEC);
2237 case 'O': FTST(OP_FTROWNED);
2238 case 'e': FTST(OP_FTIS);
2239 case 'z': FTST(OP_FTZERO);
2240 case 's': FTST(OP_FTSIZE);
2241 case 'f': FTST(OP_FTFILE);
2242 case 'd': FTST(OP_FTDIR);
2243 case 'l': FTST(OP_FTLINK);
2244 case 'p': FTST(OP_FTPIPE);
2245 case 'S': FTST(OP_FTSOCK);
2246 case 'u': FTST(OP_FTSUID);
2247 case 'g': FTST(OP_FTSGID);
2248 case 'k': FTST(OP_FTSVTX);
2249 case 'b': FTST(OP_FTBLK);
2250 case 'c': FTST(OP_FTCHR);
2251 case 't': FTST(OP_FTTTY);
2252 case 'T': FTST(OP_FTTEXT);
2253 case 'B': FTST(OP_FTBINARY);
2254 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
2255 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
2256 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
2258 croak("Unrecognized file test: -%c", (int)tmp);
2265 if (PL_expect == XOPERATOR)
2270 else if (*s == '>') {
2273 if (isIDFIRST_lazy(s)) {
2274 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
2282 if (PL_expect == XOPERATOR)
2285 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2287 OPERATOR('-'); /* unary minus */
2294 if (PL_expect == XOPERATOR)
2299 if (PL_expect == XOPERATOR)
2302 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2308 if (PL_expect != XOPERATOR) {
2309 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2310 PL_expect = XOPERATOR;
2311 force_ident(PL_tokenbuf, '*');
2324 if (PL_expect == XOPERATOR) {
2328 PL_tokenbuf[0] = '%';
2329 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2330 if (!PL_tokenbuf[1]) {
2332 yyerror("Final % should be \\% or %name");
2335 PL_pending_ident = '%';
2357 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
2358 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
2363 if (PL_curcop->cop_line < PL_copline)
2364 PL_copline = PL_curcop->cop_line;
2375 if (PL_lex_brackets <= 0)
2376 yyerror("Unmatched right square bracket");
2379 if (PL_lex_state == LEX_INTERPNORMAL) {
2380 if (PL_lex_brackets == 0) {
2381 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
2382 PL_lex_state = LEX_INTERPEND;
2389 if (PL_lex_brackets > 100) {
2390 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
2391 if (newlb != PL_lex_brackstack) {
2393 PL_lex_brackstack = newlb;
2396 switch (PL_expect) {
2398 if (PL_lex_formbrack) {
2402 if (PL_oldoldbufptr == PL_last_lop)
2403 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2405 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2406 OPERATOR(HASHBRACK);
2408 while (s < PL_bufend && (*s == ' ' || *s == '\t'))
2411 PL_tokenbuf[0] = '\0';
2412 if (d < PL_bufend && *d == '-') {
2413 PL_tokenbuf[0] = '-';
2415 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2418 if (d < PL_bufend && isIDFIRST_lazy(d)) {
2419 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
2421 while (d < PL_bufend && (*d == ' ' || *d == '\t'))
2424 char minus = (PL_tokenbuf[0] == '-');
2425 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2432 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
2436 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2441 if (PL_oldoldbufptr == PL_last_lop)
2442 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
2444 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
2447 OPERATOR(HASHBRACK);
2448 /* This hack serves to disambiguate a pair of curlies
2449 * as being a block or an anon hash. Normally, expectation
2450 * determines that, but in cases where we're not in a
2451 * position to expect anything in particular (like inside
2452 * eval"") we have to resolve the ambiguity. This code
2453 * covers the case where the first term in the curlies is a
2454 * quoted string. Most other cases need to be explicitly
2455 * disambiguated by prepending a `+' before the opening
2456 * curly in order to force resolution as an anon hash.
2458 * XXX should probably propagate the outer expectation
2459 * into eval"" to rely less on this hack, but that could
2460 * potentially break current behavior of eval"".
2464 if (*s == '\'' || *s == '"' || *s == '`') {
2465 /* common case: get past first string, handling escapes */
2466 for (t++; t < PL_bufend && *t != *s;)
2467 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2471 else if (*s == 'q') {
2474 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
2475 && !isALNUM(*t)))) {
2477 char open, close, term;
2480 while (t < PL_bufend && isSPACE(*t))
2484 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2488 for (t++; t < PL_bufend; t++) {
2489 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
2491 else if (*t == open)
2495 for (t++; t < PL_bufend; t++) {
2496 if (*t == '\\' && t+1 < PL_bufend)
2498 else if (*t == close && --brackets <= 0)
2500 else if (*t == open)
2506 else if (isIDFIRST_lazy(s)) {
2507 for (t++; t < PL_bufend && isALNUM_lazy(t); t++) ;
2509 while (t < PL_bufend && isSPACE(*t))
2511 /* if comma follows first term, call it an anon hash */
2512 /* XXX it could be a comma expression with loop modifiers */
2513 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2514 || (*t == '=' && t[1] == '>')))
2515 OPERATOR(HASHBRACK);
2516 if (PL_expect == XREF)
2517 PL_expect = XSTATE; /* was XTERM, trying XSTATE */
2519 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
2525 yylval.ival = PL_curcop->cop_line;
2526 if (isSPACE(*s) || *s == '#')
2527 PL_copline = NOLINE; /* invalidate current command line number */
2532 if (PL_lex_brackets <= 0)
2533 yyerror("Unmatched right curly bracket");
2535 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
2536 if (PL_lex_brackets < PL_lex_formbrack)
2537 PL_lex_formbrack = 0;
2538 if (PL_lex_state == LEX_INTERPNORMAL) {
2539 if (PL_lex_brackets == 0) {
2540 if (PL_lex_fakebrack) {
2541 PL_lex_state = LEX_INTERPEND;
2543 return yylex(PERL_YYLEX_PARAM); /* ignore fake brackets */
2545 if (*s == '-' && s[1] == '>')
2546 PL_lex_state = LEX_INTERPENDMAYBE;
2547 else if (*s != '[' && *s != '{')
2548 PL_lex_state = LEX_INTERPEND;
2551 if (PL_lex_brackets < PL_lex_fakebrack) {
2553 PL_lex_fakebrack = 0;
2554 return yylex(PERL_YYLEX_PARAM); /* ignore fake brackets */
2564 if (PL_expect == XOPERATOR) {
2565 if (ckWARN(WARN_SEMICOLON) && isIDFIRST_lazy(s) && PL_bufptr == PL_linestart) {
2566 PL_curcop->cop_line--;
2567 warner(WARN_SEMICOLON, PL_warn_nosemi);
2568 PL_curcop->cop_line++;
2573 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2575 PL_expect = XOPERATOR;
2576 force_ident(PL_tokenbuf, '&');
2580 yylval.ival = (OPpENTERSUB_AMPER<<8);
2599 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2600 warner(WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
2602 if (PL_expect == XSTATE && isALPHA(tmp) &&
2603 (s == PL_linestart+1 || s[-2] == '\n') )
2605 if (PL_in_eval && !PL_rsfp) {
2610 if (strnEQ(s,"=cut",4)) {
2624 PL_doextract = TRUE;
2627 if (PL_lex_brackets < PL_lex_formbrack) {
2629 #ifdef PERL_STRICT_CR
2630 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2632 for (t = s; *t == ' ' || *t == '\t' || *t == '\r'; t++) ;
2634 if (*t == '\n' || *t == '#') {
2652 if (PL_expect != XOPERATOR) {
2653 if (s[1] != '<' && !strchr(s,'>'))
2656 s = scan_heredoc(s);
2658 s = scan_inputsymbol(s);
2659 TERM(sublex_start());
2664 SHop(OP_LEFT_SHIFT);
2678 SHop(OP_RIGHT_SHIFT);
2687 if (PL_expect == XOPERATOR) {
2688 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2691 return ','; /* grandfather non-comma-format format */
2695 if (s[1] == '#' && (isIDFIRST_lazy(s+2) || strchr("{$:+-", s[2]))) {
2696 if (PL_expect == XOPERATOR)
2697 no_op("Array length", PL_bufptr);
2698 PL_tokenbuf[0] = '@';
2699 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
2701 if (!PL_tokenbuf[1])
2703 PL_expect = XOPERATOR;
2704 PL_pending_ident = '#';
2708 if (PL_expect == XOPERATOR)
2709 no_op("Scalar", PL_bufptr);
2710 PL_tokenbuf[0] = '$';
2711 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
2712 if (!PL_tokenbuf[1]) {
2714 yyerror("Final $ should be \\$ or $name");
2718 /* This kludge not intended to be bulletproof. */
2719 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
2720 yylval.opval = newSVOP(OP_CONST, 0,
2721 newSViv((IV)PL_compiling.cop_arybase));
2722 yylval.opval->op_private = OPpCONST_ARYBASE;
2728 if (PL_lex_state == LEX_NORMAL)
2731 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
2734 PL_tokenbuf[0] = '@';
2735 if (ckWARN(WARN_SYNTAX)) {
2737 isSPACE(*t) || isALNUM_lazy(t) || *t == '$';
2740 PL_bufptr = skipspace(PL_bufptr);
2741 while (t < PL_bufend && *t != ']')
2744 "Multidimensional syntax %.*s not supported",
2745 (t - PL_bufptr) + 1, PL_bufptr);
2749 else if (*s == '{') {
2750 PL_tokenbuf[0] = '%';
2751 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
2752 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2754 char tmpbuf[sizeof PL_tokenbuf];
2756 for (t++; isSPACE(*t); t++) ;
2757 if (isIDFIRST_lazy(t)) {
2758 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2759 for (; isSPACE(*t); t++) ;
2760 if (*t == ';' && perl_get_cv(tmpbuf, FALSE))
2762 "You need to quote \"%s\"", tmpbuf);
2768 PL_expect = XOPERATOR;
2769 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
2770 bool islop = (PL_last_lop == PL_oldoldbufptr);
2771 if (!islop || PL_last_lop_op == OP_GREPSTART)
2772 PL_expect = XOPERATOR;
2773 else if (strchr("$@\"'`q", *s))
2774 PL_expect = XTERM; /* e.g. print $fh "foo" */
2775 else if (strchr("&*<%", *s) && isIDFIRST_lazy(s+1))
2776 PL_expect = XTERM; /* e.g. print $fh &sub */
2777 else if (isIDFIRST_lazy(s)) {
2778 char tmpbuf[sizeof PL_tokenbuf];
2779 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2780 if (tmp = keyword(tmpbuf, len)) {
2781 /* binary operators exclude handle interpretations */
2793 PL_expect = XTERM; /* e.g. print $fh length() */
2798 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2799 if (gv && GvCVu(gv))
2800 PL_expect = XTERM; /* e.g. print $fh subr() */
2803 else if (isDIGIT(*s))
2804 PL_expect = XTERM; /* e.g. print $fh 3 */
2805 else if (*s == '.' && isDIGIT(s[1]))
2806 PL_expect = XTERM; /* e.g. print $fh .3 */
2807 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
2808 PL_expect = XTERM; /* e.g. print $fh -1 */
2809 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
2810 PL_expect = XTERM; /* print $fh <<"EOF" */
2812 PL_pending_ident = '$';
2816 if (PL_expect == XOPERATOR)
2818 PL_tokenbuf[0] = '@';
2819 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
2820 if (!PL_tokenbuf[1]) {
2822 yyerror("Final @ should be \\@ or @name");
2825 if (PL_lex_state == LEX_NORMAL)
2827 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
2829 PL_tokenbuf[0] = '%';
2831 /* Warn about @ where they meant $. */
2832 if (ckWARN(WARN_SYNTAX)) {
2833 if (*s == '[' || *s == '{') {
2835 while (*t && (isALNUM_lazy(t) || strchr(" \t$#+-'\"", *t)))
2837 if (*t == '}' || *t == ']') {
2839 PL_bufptr = skipspace(PL_bufptr);
2841 "Scalar value %.*s better written as $%.*s",
2842 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
2847 PL_pending_ident = '@';
2850 case '/': /* may either be division or pattern */
2851 case '?': /* may either be conditional or pattern */
2852 if (PL_expect != XOPERATOR) {
2853 /* Disable warning on "study /blah/" */
2854 if (PL_oldoldbufptr == PL_last_uni
2855 && (*PL_last_uni != 's' || s - PL_last_uni < 5
2856 || memNE(PL_last_uni, "study", 5) || isALNUM_lazy(PL_last_uni+5)))
2858 s = scan_pat(s,OP_MATCH);
2859 TERM(sublex_start());
2867 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
2868 #ifdef PERL_STRICT_CR
2871 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
2873 && (s == PL_linestart || s[-1] == '\n') )
2875 PL_lex_formbrack = 0;
2879 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
2885 yylval.ival = OPf_SPECIAL;
2891 if (PL_expect != XOPERATOR)
2896 case '0': case '1': case '2': case '3': case '4':
2897 case '5': case '6': case '7': case '8': case '9':
2899 if (PL_expect == XOPERATOR)
2905 if (PL_expect == XOPERATOR) {
2906 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2909 return ','; /* grandfather non-comma-format format */
2915 missingterm((char*)0);
2916 yylval.ival = OP_CONST;
2917 TERM(sublex_start());
2921 if (PL_expect == XOPERATOR) {
2922 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
2925 return ','; /* grandfather non-comma-format format */
2931 missingterm((char*)0);
2932 yylval.ival = OP_CONST;
2933 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
2934 if (*d == '$' || *d == '@' || *d == '\\' || *d & 0x80) {
2935 yylval.ival = OP_STRINGIFY;
2939 TERM(sublex_start());
2943 if (PL_expect == XOPERATOR)
2944 no_op("Backticks",s);
2946 missingterm((char*)0);
2947 yylval.ival = OP_BACKTICK;
2949 TERM(sublex_start());
2953 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
2954 warner(WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
2956 if (PL_expect == XOPERATOR)
2957 no_op("Backslash",s);
2961 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
3001 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3003 /* Some keywords can be followed by any delimiter, including ':' */
3004 tmp = (len == 1 && strchr("msyq", PL_tokenbuf[0]) ||
3005 len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3006 (PL_tokenbuf[0] == 'q' &&
3007 strchr("qwxr", PL_tokenbuf[1]))));
3009 /* x::* is just a word, unless x is "CORE" */
3010 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
3014 while (d < PL_bufend && isSPACE(*d))
3015 d++; /* no comments skipped here, or s### is misparsed */
3017 /* Is this a label? */
3018 if (!tmp && PL_expect == XSTATE
3019 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
3021 yylval.pval = savepv(PL_tokenbuf);
3026 /* Check for keywords */
3027 tmp = keyword(PL_tokenbuf, len);
3029 /* Is this a word before a => operator? */
3030 if (strnEQ(d,"=>",2)) {
3032 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
3033 yylval.opval->op_private = OPpCONST_BARE;
3037 if (tmp < 0) { /* second-class keyword? */
3038 GV *ogv = Nullgv; /* override (winner) */
3039 GV *hgv = Nullgv; /* hidden (loser) */
3040 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
3042 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
3045 if (GvIMPORTED_CV(gv))
3047 else if (! CvMETHOD(cv))
3051 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3052 (gv = *gvp) != (GV*)&PL_sv_undef &&
3053 GvCVu(gv) && GvIMPORTED_CV(gv))
3059 tmp = 0; /* overridden by import or by GLOBAL */
3062 && -tmp==KEY_lock /* XXX generalizable kludge */
3063 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
3065 tmp = 0; /* any sub overrides "weak" keyword */
3067 else { /* no override */
3071 if (ckWARN(WARN_AMBIGUOUS) && hgv
3072 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
3073 warner(WARN_AMBIGUOUS,
3074 "Ambiguous call resolved as CORE::%s(), %s",
3075 GvENAME(hgv), "qualify as such or use &");
3082 default: /* not a keyword */
3085 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
3087 /* Get the rest if it looks like a package qualifier */
3089 if (*s == '\'' || *s == ':' && s[1] == ':') {
3091 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
3094 croak("Bad name after %s%s", PL_tokenbuf,
3095 *s == '\'' ? "'" : "::");
3099 if (PL_expect == XOPERATOR) {
3100 if (PL_bufptr == PL_linestart) {
3101 PL_curcop->cop_line--;
3102 warner(WARN_SEMICOLON, PL_warn_nosemi);
3103 PL_curcop->cop_line++;
3106 no_op("Bareword",s);
3109 /* Look for a subroutine with this name in current package,
3110 unless name is "Foo::", in which case Foo is a bearword
3111 (and a package name). */
3114 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
3116 if (ckWARN(WARN_UNSAFE) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
3118 "Bareword \"%s\" refers to nonexistent package",
3121 PL_tokenbuf[len] = '\0';
3128 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
3131 /* if we saw a global override before, get the right name */
3134 sv = newSVpvn("CORE::GLOBAL::",14);
3135 sv_catpv(sv,PL_tokenbuf);
3138 sv = newSVpv(PL_tokenbuf,0);
3140 /* Presume this is going to be a bareword of some sort. */
3143 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3144 yylval.opval->op_private = OPpCONST_BARE;
3146 /* And if "Foo::", then that's what it certainly is. */
3151 /* See if it's the indirect object for a list operator. */
3153 if (PL_oldoldbufptr &&
3154 PL_oldoldbufptr < PL_bufptr &&
3155 (PL_oldoldbufptr == PL_last_lop || PL_oldoldbufptr == PL_last_uni) &&
3156 /* NO SKIPSPACE BEFORE HERE! */
3158 || ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF
3159 || (PL_last_lop_op == OP_ENTERSUB
3161 && PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*')) )
3163 bool immediate_paren = *s == '(';
3165 /* (Now we can afford to cross potential line boundary.) */
3168 /* Two barewords in a row may indicate method call. */
3170 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp=intuit_method(s,gv)))
3173 /* If not a declared subroutine, it's an indirect object. */
3174 /* (But it's an indir obj regardless for sort.) */
3176 if ((PL_last_lop_op == OP_SORT ||
3177 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
3178 (PL_last_lop_op != OP_MAPSTART && PL_last_lop_op != OP_GREPSTART)){
3179 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
3184 /* If followed by a paren, it's certainly a subroutine. */
3186 PL_expect = XOPERATOR;
3190 if (gv && GvCVu(gv)) {
3192 if ((cv = GvCV(gv)) && SvPOK(cv))
3193 PL_last_proto = SvPV((SV*)cv, n_a);
3194 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
3195 if (*d == ')' && (sv = cv_const_sv(cv))) {
3200 PL_nextval[PL_nexttoke].opval = yylval.opval;
3201 PL_expect = XOPERATOR;
3204 PL_last_lop_op = OP_ENTERSUB;
3208 /* If followed by var or block, call it a method (unless sub) */
3210 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3211 PL_last_lop = PL_oldbufptr;
3212 PL_last_lop_op = OP_METHOD;
3216 /* If followed by a bareword, see if it looks like indir obj. */
3218 if ((isIDFIRST_lazy(s) || *s == '$') && (tmp = intuit_method(s,gv)))
3221 /* Not a method, so call it a subroutine (if defined) */
3223 if (gv && GvCVu(gv)) {
3225 if (lastchar == '-')
3226 warn("Ambiguous use of -%s resolved as -&%s()",
3227 PL_tokenbuf, PL_tokenbuf);
3228 PL_last_lop = PL_oldbufptr;
3229 PL_last_lop_op = OP_ENTERSUB;
3230 /* Check for a constant sub */
3232 if ((sv = cv_const_sv(cv))) {
3234 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3235 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3236 yylval.opval->op_private = 0;
3240 /* Resolve to GV now. */
3241 op_free(yylval.opval);
3242 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
3243 PL_last_lop_op = OP_ENTERSUB;
3244 /* Is there a prototype? */
3247 PL_last_proto = SvPV((SV*)cv, len);
3250 if (strEQ(PL_last_proto, "$"))
3252 if (*PL_last_proto == '&' && *s == '{') {
3253 sv_setpv(PL_subname,"__ANON__");
3257 PL_last_proto = NULL;
3258 PL_nextval[PL_nexttoke].opval = yylval.opval;
3264 if (PL_hints & HINT_STRICT_SUBS &&
3267 PL_last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
3268 PL_last_lop_op != OP_ACCEPT &&
3269 PL_last_lop_op != OP_PIPE_OP &&
3270 PL_last_lop_op != OP_SOCKPAIR &&
3271 !(PL_last_lop_op == OP_ENTERSUB
3273 && PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*'))
3276 "Bareword \"%s\" not allowed while \"strict subs\" in use",
3281 /* Call it a bare word */
3284 if (ckWARN(WARN_RESERVED)) {
3285 if (lastchar != '-') {
3286 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
3288 warner(WARN_RESERVED, PL_warn_reserved, PL_tokenbuf);
3293 if (lastchar && strchr("*%&", lastchar)) {
3294 warn("Operator or semicolon missing before %c%s",
3295 lastchar, PL_tokenbuf);
3296 warn("Ambiguous use of %c resolved as operator %c",
3297 lastchar, lastchar);
3303 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3304 newSVsv(GvSV(PL_curcop->cop_filegv)));
3308 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3309 newSVpvf("%ld", (long)PL_curcop->cop_line));
3312 case KEY___PACKAGE__:
3313 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3315 ? newSVsv(PL_curstname)
3324 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
3325 char *pname = "main";
3326 if (PL_tokenbuf[2] == 'D')
3327 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
3328 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
3331 GvIOp(gv) = newIO();
3332 IoIFP(GvIOp(gv)) = PL_rsfp;
3333 #if defined(HAS_FCNTL) && defined(F_SETFD)
3335 int fd = PerlIO_fileno(PL_rsfp);
3336 fcntl(fd,F_SETFD,fd >= 3);
3339 /* Mark this internal pseudo-handle as clean */
3340 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3342 IoTYPE(GvIOp(gv)) = '|';
3343 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
3344 IoTYPE(GvIOp(gv)) = '-';
3346 IoTYPE(GvIOp(gv)) = '<';
3357 if (PL_expect == XSTATE) {
3364 if (*s == ':' && s[1] == ':') {
3367 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
3368 tmp = keyword(PL_tokenbuf, len);
3382 LOP(OP_ACCEPT,XTERM);
3388 LOP(OP_ATAN2,XTERM);
3397 LOP(OP_BLESS,XTERM);
3406 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
3423 if (!PL_cryptseen++)
3426 LOP(OP_CRYPT,XTERM);
3429 if (ckWARN(WARN_OCTAL)) {
3430 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
3431 if (*d != '0' && isDIGIT(*d))
3432 yywarn("chmod: mode argument is missing initial 0");
3434 LOP(OP_CHMOD,XTERM);
3437 LOP(OP_CHOWN,XTERM);
3440 LOP(OP_CONNECT,XTERM);
3456 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3460 PL_hints |= HINT_BLOCK_SCOPE;
3470 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
3471 LOP(OP_DBMOPEN,XTERM);
3477 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3484 yylval.ival = PL_curcop->cop_line;
3498 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
3499 UNIBRACK(OP_ENTEREVAL);
3514 case KEY_endhostent:
3520 case KEY_endservent:
3523 case KEY_endprotoent:
3534 yylval.ival = PL_curcop->cop_line;
3536 if (PL_expect == XSTATE && isIDFIRST_lazy(s)) {
3538 if ((PL_bufend - p) >= 3 &&
3539 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3542 if (isIDFIRST_lazy(p))
3543 croak("Missing $ on loop variable");
3548 LOP(OP_FORMLINE,XTERM);
3554 LOP(OP_FCNTL,XTERM);
3560 LOP(OP_FLOCK,XTERM);
3569 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3572 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3587 case KEY_getpriority:
3588 LOP(OP_GETPRIORITY,XTERM);
3590 case KEY_getprotobyname:
3593 case KEY_getprotobynumber:
3594 LOP(OP_GPBYNUMBER,XTERM);
3596 case KEY_getprotoent:
3608 case KEY_getpeername:
3609 UNI(OP_GETPEERNAME);
3611 case KEY_gethostbyname:
3614 case KEY_gethostbyaddr:
3615 LOP(OP_GHBYADDR,XTERM);
3617 case KEY_gethostent:
3620 case KEY_getnetbyname:
3623 case KEY_getnetbyaddr:
3624 LOP(OP_GNBYADDR,XTERM);
3629 case KEY_getservbyname:
3630 LOP(OP_GSBYNAME,XTERM);
3632 case KEY_getservbyport:
3633 LOP(OP_GSBYPORT,XTERM);
3635 case KEY_getservent:
3638 case KEY_getsockname:
3639 UNI(OP_GETSOCKNAME);
3641 case KEY_getsockopt:
3642 LOP(OP_GSOCKOPT,XTERM);
3664 yylval.ival = PL_curcop->cop_line;
3668 LOP(OP_INDEX,XTERM);
3674 LOP(OP_IOCTL,XTERM);
3686 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3717 LOP(OP_LISTEN,XTERM);
3726 s = scan_pat(s,OP_MATCH);
3727 TERM(sublex_start());
3730 LOP(OP_MAPSTART, XREF);
3733 LOP(OP_MKDIR,XTERM);
3736 LOP(OP_MSGCTL,XTERM);
3739 LOP(OP_MSGGET,XTERM);
3742 LOP(OP_MSGRCV,XTERM);
3745 LOP(OP_MSGSND,XTERM);
3750 if (isIDFIRST_lazy(s)) {
3751 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
3752 PL_in_my_stash = gv_stashpv(PL_tokenbuf, FALSE);
3753 if (!PL_in_my_stash) {
3756 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
3763 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3770 if (PL_expect != XSTATE)
3771 yyerror("\"no\" not allowed in expression");
3772 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3773 s = force_version(s);
3782 if (isIDFIRST_lazy(s)) {
3784 for (d = s; isALNUM_lazy(d); d++) ;
3786 if (strchr("|&*+-=!?:.", *t))
3787 warn("Precedence problem: open %.*s should be open(%.*s)",
3793 yylval.ival = OP_OR;
3803 LOP(OP_OPEN_DIR,XTERM);
3806 checkcomma(s,PL_tokenbuf,"filehandle");
3810 checkcomma(s,PL_tokenbuf,"filehandle");
3829 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3833 LOP(OP_PIPE_OP,XTERM);
3838 missingterm((char*)0);
3839 yylval.ival = OP_CONST;
3840 TERM(sublex_start());
3848 missingterm((char*)0);
3850 if (SvCUR(PL_lex_stuff)) {
3853 d = SvPV_force(PL_lex_stuff, len);
3855 for (; isSPACE(*d) && len; --len, ++d) ;
3858 if (!warned && ckWARN(WARN_SYNTAX)) {
3859 for (; !isSPACE(*d) && len; --len, ++d) {
3862 "Possible attempt to separate words with commas");
3865 else if (*d == '#') {
3867 "Possible attempt to put comments in qw() list");
3873 for (; !isSPACE(*d) && len; --len, ++d) ;
3875 words = append_elem(OP_LIST, words,
3876 newSVOP(OP_CONST, 0, newSVpvn(b, d-b)));
3880 PL_nextval[PL_nexttoke].opval = words;
3885 SvREFCNT_dec(PL_lex_stuff);
3886 PL_lex_stuff = Nullsv;
3893 missingterm((char*)0);
3894 yylval.ival = OP_STRINGIFY;
3895 if (SvIVX(PL_lex_stuff) == '\'')
3896 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
3897 TERM(sublex_start());
3900 s = scan_pat(s,OP_QR);
3901 TERM(sublex_start());
3906 missingterm((char*)0);
3907 yylval.ival = OP_BACKTICK;
3909 TERM(sublex_start());
3915 *PL_tokenbuf = '\0';
3916 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3917 if (isIDFIRST_lazy(PL_tokenbuf))
3918 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
3920 yyerror("<> should be quotes");
3927 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3931 LOP(OP_RENAME,XTERM);
3940 LOP(OP_RINDEX,XTERM);
3963 LOP(OP_REVERSE,XTERM);
3974 TERM(sublex_start());
3976 TOKEN(1); /* force error */
3985 LOP(OP_SELECT,XTERM);
3991 LOP(OP_SEMCTL,XTERM);
3994 LOP(OP_SEMGET,XTERM);
3997 LOP(OP_SEMOP,XTERM);
4003 LOP(OP_SETPGRP,XTERM);
4005 case KEY_setpriority:
4006 LOP(OP_SETPRIORITY,XTERM);
4008 case KEY_sethostent:
4014 case KEY_setservent:
4017 case KEY_setprotoent:
4027 LOP(OP_SEEKDIR,XTERM);
4029 case KEY_setsockopt:
4030 LOP(OP_SSOCKOPT,XTERM);
4036 LOP(OP_SHMCTL,XTERM);
4039 LOP(OP_SHMGET,XTERM);
4042 LOP(OP_SHMREAD,XTERM);
4045 LOP(OP_SHMWRITE,XTERM);
4048 LOP(OP_SHUTDOWN,XTERM);
4057 LOP(OP_SOCKET,XTERM);
4059 case KEY_socketpair:
4060 LOP(OP_SOCKPAIR,XTERM);
4063 checkcomma(s,PL_tokenbuf,"subroutine name");
4065 if (*s == ';' || *s == ')') /* probably a close */
4066 croak("sort is now a reserved word");
4068 s = force_word(s,WORD,TRUE,TRUE,FALSE);
4072 LOP(OP_SPLIT,XTERM);
4075 LOP(OP_SPRINTF,XTERM);
4078 LOP(OP_SPLICE,XTERM);
4094 LOP(OP_SUBSTR,XTERM);
4101 if (isIDFIRST_lazy(s) || *s == '\'' || *s == ':') {
4102 char tmpbuf[sizeof PL_tokenbuf];
4104 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4105 if (strchr(tmpbuf, ':'))
4106 sv_setpv(PL_subname, tmpbuf);
4108 sv_setsv(PL_subname,PL_curstname);
4109 sv_catpvn(PL_subname,"::",2);
4110 sv_catpvn(PL_subname,tmpbuf,len);
4112 s = force_word(s,WORD,FALSE,TRUE,TRUE);
4116 PL_expect = XTERMBLOCK;
4117 sv_setpv(PL_subname,"?");
4120 if (tmp == KEY_format) {
4123 PL_lex_formbrack = PL_lex_brackets + 1;
4127 /* Look for a prototype */
4134 SvREFCNT_dec(PL_lex_stuff);
4135 PL_lex_stuff = Nullsv;
4136 croak("Prototype not terminated");
4139 d = SvPVX(PL_lex_stuff);
4141 for (p = d; *p; ++p) {
4146 SvCUR(PL_lex_stuff) = tmp;
4149 PL_nextval[1] = PL_nextval[0];
4150 PL_nexttype[1] = PL_nexttype[0];
4151 PL_nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
4152 PL_nexttype[0] = THING;
4153 if (PL_nexttoke == 1) {
4154 PL_lex_defer = PL_lex_state;
4155 PL_lex_expect = PL_expect;
4156 PL_lex_state = LEX_KNOWNEXT;
4158 PL_lex_stuff = Nullsv;
4161 if (*SvPV(PL_subname,n_a) == '?') {
4162 sv_setpv(PL_subname,"__ANON__");
4169 LOP(OP_SYSTEM,XREF);
4172 LOP(OP_SYMLINK,XTERM);
4175 LOP(OP_SYSCALL,XTERM);
4178 LOP(OP_SYSOPEN,XTERM);
4181 LOP(OP_SYSSEEK,XTERM);
4184 LOP(OP_SYSREAD,XTERM);
4187 LOP(OP_SYSWRITE,XTERM);
4191 TERM(sublex_start());
4212 LOP(OP_TRUNCATE,XTERM);
4224 yylval.ival = PL_curcop->cop_line;
4228 yylval.ival = PL_curcop->cop_line;
4232 LOP(OP_UNLINK,XTERM);
4238 LOP(OP_UNPACK,XTERM);
4241 LOP(OP_UTIME,XTERM);
4244 if (ckWARN(WARN_OCTAL)) {
4245 for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
4246 if (*d != '0' && isDIGIT(*d))
4247 yywarn("umask: argument is missing initial 0");
4252 LOP(OP_UNSHIFT,XTERM);
4255 if (PL_expect != XSTATE)
4256 yyerror("\"use\" not allowed in expression");
4259 s = force_version(s);
4260 if(*s == ';' || (s = skipspace(s), *s == ';')) {
4261 PL_nextval[PL_nexttoke].opval = Nullop;
4266 s = force_word(s,WORD,FALSE,TRUE,FALSE);
4267 s = force_version(s);
4280 yylval.ival = PL_curcop->cop_line;
4284 PL_hints |= HINT_BLOCK_SCOPE;
4291 LOP(OP_WAITPID,XTERM);
4299 static char ctl_l[2];
4301 if (ctl_l[0] == '\0')
4302 ctl_l[0] = toCTRL('L');
4303 gv_fetchpv(ctl_l,TRUE, SVt_PV);
4306 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
4311 if (PL_expect == XOPERATOR)
4317 yylval.ival = OP_XOR;
4322 TERM(sublex_start());
4328 keyword(register char *d, I32 len)
4333 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
4334 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
4335 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
4336 if (strEQ(d,"__DATA__")) return KEY___DATA__;
4337 if (strEQ(d,"__END__")) return KEY___END__;
4341 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
4346 if (strEQ(d,"and")) return -KEY_and;
4347 if (strEQ(d,"abs")) return -KEY_abs;
4350 if (strEQ(d,"alarm")) return -KEY_alarm;
4351 if (strEQ(d,"atan2")) return -KEY_atan2;
4354 if (strEQ(d,"accept")) return -KEY_accept;
4359 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
4362 if (strEQ(d,"bless")) return -KEY_bless;
4363 if (strEQ(d,"bind")) return -KEY_bind;
4364 if (strEQ(d,"binmode")) return -KEY_binmode;
4367 if (strEQ(d,"CORE")) return -KEY_CORE;
4372 if (strEQ(d,"cmp")) return -KEY_cmp;
4373 if (strEQ(d,"chr")) return -KEY_chr;
4374 if (strEQ(d,"cos")) return -KEY_cos;
4377 if (strEQ(d,"chop")) return KEY_chop;
4380 if (strEQ(d,"close")) return -KEY_close;
4381 if (strEQ(d,"chdir")) return -KEY_chdir;
4382 if (strEQ(d,"chomp")) return KEY_chomp;
4383 if (strEQ(d,"chmod")) return -KEY_chmod;
4384 if (strEQ(d,"chown")) return -KEY_chown;
4385 if (strEQ(d,"crypt")) return -KEY_crypt;
4388 if (strEQ(d,"chroot")) return -KEY_chroot;
4389 if (strEQ(d,"caller")) return -KEY_caller;
4392 if (strEQ(d,"connect")) return -KEY_connect;
4395 if (strEQ(d,"closedir")) return -KEY_closedir;
4396 if (strEQ(d,"continue")) return -KEY_continue;
4401 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
4406 if (strEQ(d,"do")) return KEY_do;
4409 if (strEQ(d,"die")) return -KEY_die;
4412 if (strEQ(d,"dump")) return -KEY_dump;
4415 if (strEQ(d,"delete")) return KEY_delete;
4418 if (strEQ(d,"defined")) return KEY_defined;
4419 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
4422 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
4427 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
4428 if (strEQ(d,"END")) return KEY_END;
4433 if (strEQ(d,"eq")) return -KEY_eq;
4436 if (strEQ(d,"eof")) return -KEY_eof;
4437 if (strEQ(d,"exp")) return -KEY_exp;
4440 if (strEQ(d,"else")) return KEY_else;
4441 if (strEQ(d,"exit")) return -KEY_exit;
4442 if (strEQ(d,"eval")) return KEY_eval;
4443 if (strEQ(d,"exec")) return -KEY_exec;
4444 if (strEQ(d,"each")) return KEY_each;
4447 if (strEQ(d,"elsif")) return KEY_elsif;
4450 if (strEQ(d,"exists")) return KEY_exists;
4451 if (strEQ(d,"elseif")) warn("elseif should be elsif");
4454 if (strEQ(d,"endgrent")) return -KEY_endgrent;
4455 if (strEQ(d,"endpwent")) return -KEY_endpwent;
4458 if (strEQ(d,"endnetent")) return -KEY_endnetent;
4461 if (strEQ(d,"endhostent")) return -KEY_endhostent;
4462 if (strEQ(d,"endservent")) return -KEY_endservent;
4465 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
4472 if (strEQ(d,"for")) return KEY_for;
4475 if (strEQ(d,"fork")) return -KEY_fork;
4478 if (strEQ(d,"fcntl")) return -KEY_fcntl;
4479 if (strEQ(d,"flock")) return -KEY_flock;
4482 if (strEQ(d,"format")) return KEY_format;
4483 if (strEQ(d,"fileno")) return -KEY_fileno;
4486 if (strEQ(d,"foreach")) return KEY_foreach;
4489 if (strEQ(d,"formline")) return -KEY_formline;
4495 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
4496 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4500 if (strnEQ(d,"get",3)) {
4505 if (strEQ(d,"ppid")) return -KEY_getppid;
4506 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4509 if (strEQ(d,"pwent")) return -KEY_getpwent;
4510 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4511 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4514 if (strEQ(d,"peername")) return -KEY_getpeername;
4515 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4516 if (strEQ(d,"priority")) return -KEY_getpriority;
4519 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4522 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4526 else if (*d == 'h') {
4527 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4528 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4529 if (strEQ(d,"hostent")) return -KEY_gethostent;
4531 else if (*d == 'n') {
4532 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4533 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4534 if (strEQ(d,"netent")) return -KEY_getnetent;
4536 else if (*d == 's') {
4537 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4538 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4539 if (strEQ(d,"servent")) return -KEY_getservent;
4540 if (strEQ(d,"sockname")) return -KEY_getsockname;
4541 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4543 else if (*d == 'g') {
4544 if (strEQ(d,"grent")) return -KEY_getgrent;
4545 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4546 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4548 else if (*d == 'l') {
4549 if (strEQ(d,"login")) return -KEY_getlogin;
4551 else if (strEQ(d,"c")) return -KEY_getc;
4556 if (strEQ(d,"gt")) return -KEY_gt;
4557 if (strEQ(d,"ge")) return -KEY_ge;
4560 if (strEQ(d,"grep")) return KEY_grep;
4561 if (strEQ(d,"goto")) return KEY_goto;
4562 if (strEQ(d,"glob")) return KEY_glob;
4565 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4570 if (strEQ(d,"hex")) return -KEY_hex;
4573 if (strEQ(d,"INIT")) return KEY_INIT;
4578 if (strEQ(d,"if")) return KEY_if;
4581 if (strEQ(d,"int")) return -KEY_int;
4584 if (strEQ(d,"index")) return -KEY_index;
4585 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4590 if (strEQ(d,"join")) return -KEY_join;
4594 if (strEQ(d,"keys")) return KEY_keys;
4595 if (strEQ(d,"kill")) return -KEY_kill;
4600 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4601 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4607 if (strEQ(d,"lt")) return -KEY_lt;
4608 if (strEQ(d,"le")) return -KEY_le;
4609 if (strEQ(d,"lc")) return -KEY_lc;
4612 if (strEQ(d,"log")) return -KEY_log;
4615 if (strEQ(d,"last")) return KEY_last;
4616 if (strEQ(d,"link")) return -KEY_link;
4617 if (strEQ(d,"lock")) return -KEY_lock;
4620 if (strEQ(d,"local")) return KEY_local;
4621 if (strEQ(d,"lstat")) return -KEY_lstat;
4624 if (strEQ(d,"length")) return -KEY_length;
4625 if (strEQ(d,"listen")) return -KEY_listen;
4628 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4631 if (strEQ(d,"localtime")) return -KEY_localtime;
4637 case 1: return KEY_m;
4639 if (strEQ(d,"my")) return KEY_my;
4642 if (strEQ(d,"map")) return KEY_map;
4645 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4648 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4649 if (strEQ(d,"msgget")) return -KEY_msgget;
4650 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4651 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4656 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4659 if (strEQ(d,"next")) return KEY_next;
4660 if (strEQ(d,"ne")) return -KEY_ne;
4661 if (strEQ(d,"not")) return -KEY_not;
4662 if (strEQ(d,"no")) return KEY_no;
4667 if (strEQ(d,"or")) return -KEY_or;
4670 if (strEQ(d,"ord")) return -KEY_ord;
4671 if (strEQ(d,"oct")) return -KEY_oct;
4672 if (strEQ(d,"our")) { deprecate("reserved word \"our\"");
4676 if (strEQ(d,"open")) return -KEY_open;
4679 if (strEQ(d,"opendir")) return -KEY_opendir;
4686 if (strEQ(d,"pop")) return KEY_pop;
4687 if (strEQ(d,"pos")) return KEY_pos;
4690 if (strEQ(d,"push")) return KEY_push;
4691 if (strEQ(d,"pack")) return -KEY_pack;
4692 if (strEQ(d,"pipe")) return -KEY_pipe;
4695 if (strEQ(d,"print")) return KEY_print;
4698 if (strEQ(d,"printf")) return KEY_printf;
4701 if (strEQ(d,"package")) return KEY_package;
4704 if (strEQ(d,"prototype")) return KEY_prototype;
4709 if (strEQ(d,"q")) return KEY_q;
4710 if (strEQ(d,"qr")) return KEY_qr;
4711 if (strEQ(d,"qq")) return KEY_qq;
4712 if (strEQ(d,"qw")) return KEY_qw;
4713 if (strEQ(d,"qx")) return KEY_qx;
4715 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4720 if (strEQ(d,"ref")) return -KEY_ref;
4723 if (strEQ(d,"read")) return -KEY_read;
4724 if (strEQ(d,"rand")) return -KEY_rand;
4725 if (strEQ(d,"recv")) return -KEY_recv;
4726 if (strEQ(d,"redo")) return KEY_redo;
4729 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4730 if (strEQ(d,"reset")) return -KEY_reset;
4733 if (strEQ(d,"return")) return KEY_return;
4734 if (strEQ(d,"rename")) return -KEY_rename;
4735 if (strEQ(d,"rindex")) return -KEY_rindex;
4738 if (strEQ(d,"require")) return -KEY_require;
4739 if (strEQ(d,"reverse")) return -KEY_reverse;
4740 if (strEQ(d,"readdir")) return -KEY_readdir;
4743 if (strEQ(d,"readlink")) return -KEY_readlink;
4744 if (strEQ(d,"readline")) return -KEY_readline;
4745 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4748 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4754 case 0: return KEY_s;
4756 if (strEQ(d,"scalar")) return KEY_scalar;
4761 if (strEQ(d,"seek")) return -KEY_seek;
4762 if (strEQ(d,"send")) return -KEY_send;
4765 if (strEQ(d,"semop")) return -KEY_semop;
4768 if (strEQ(d,"select")) return -KEY_select;
4769 if (strEQ(d,"semctl")) return -KEY_semctl;
4770 if (strEQ(d,"semget")) return -KEY_semget;
4773 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4774 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4777 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4778 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4781 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4784 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4785 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4786 if (strEQ(d,"setservent")) return -KEY_setservent;
4789 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4790 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4797 if (strEQ(d,"shift")) return KEY_shift;
4800 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4801 if (strEQ(d,"shmget")) return -KEY_shmget;
4804 if (strEQ(d,"shmread")) return -KEY_shmread;
4807 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4808 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4813 if (strEQ(d,"sin")) return -KEY_sin;
4816 if (strEQ(d,"sleep")) return -KEY_sleep;
4819 if (strEQ(d,"sort")) return KEY_sort;
4820 if (strEQ(d,"socket")) return -KEY_socket;
4821 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4824 if (strEQ(d,"split")) return KEY_split;
4825 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4826 if (strEQ(d,"splice")) return KEY_splice;
4829 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4832 if (strEQ(d,"srand")) return -KEY_srand;
4835 if (strEQ(d,"stat")) return -KEY_stat;
4836 if (strEQ(d,"study")) return KEY_study;
4839 if (strEQ(d,"substr")) return -KEY_substr;
4840 if (strEQ(d,"sub")) return KEY_sub;
4845 if (strEQ(d,"system")) return -KEY_system;
4848 if (strEQ(d,"symlink")) return -KEY_symlink;
4849 if (strEQ(d,"syscall")) return -KEY_syscall;
4850 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4851 if (strEQ(d,"sysread")) return -KEY_sysread;
4852 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4855 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4864 if (strEQ(d,"tr")) return KEY_tr;
4867 if (strEQ(d,"tie")) return KEY_tie;
4870 if (strEQ(d,"tell")) return -KEY_tell;
4871 if (strEQ(d,"tied")) return KEY_tied;
4872 if (strEQ(d,"time")) return -KEY_time;
4875 if (strEQ(d,"times")) return -KEY_times;
4878 if (strEQ(d,"telldir")) return -KEY_telldir;
4881 if (strEQ(d,"truncate")) return -KEY_truncate;
4888 if (strEQ(d,"uc")) return -KEY_uc;
4891 if (strEQ(d,"use")) return KEY_use;
4894 if (strEQ(d,"undef")) return KEY_undef;
4895 if (strEQ(d,"until")) return KEY_until;
4896 if (strEQ(d,"untie")) return KEY_untie;
4897 if (strEQ(d,"utime")) return -KEY_utime;
4898 if (strEQ(d,"umask")) return -KEY_umask;
4901 if (strEQ(d,"unless")) return KEY_unless;
4902 if (strEQ(d,"unpack")) return -KEY_unpack;
4903 if (strEQ(d,"unlink")) return -KEY_unlink;
4906 if (strEQ(d,"unshift")) return KEY_unshift;
4907 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4912 if (strEQ(d,"values")) return -KEY_values;
4913 if (strEQ(d,"vec")) return -KEY_vec;
4918 if (strEQ(d,"warn")) return -KEY_warn;
4919 if (strEQ(d,"wait")) return -KEY_wait;
4922 if (strEQ(d,"while")) return KEY_while;
4923 if (strEQ(d,"write")) return -KEY_write;
4926 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4929 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4934 if (len == 1) return -KEY_x;
4935 if (strEQ(d,"xor")) return -KEY_xor;
4938 if (len == 1) return KEY_y;
4947 checkcomma(register char *s, char *name, char *what)
4951 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4952 dTHR; /* only for ckWARN */
4953 if (ckWARN(WARN_SYNTAX)) {
4955 for (w = s+2; *w && level; w++) {
4962 for (; *w && isSPACE(*w); w++) ;
4963 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4964 warner(WARN_SYNTAX, "%s (...) interpreted as function",name);
4967 while (s < PL_bufend && isSPACE(*s))
4971 while (s < PL_bufend && isSPACE(*s))
4973 if (isIDFIRST_lazy(s)) {
4975 while (isALNUM_lazy(s))
4977 while (s < PL_bufend && isSPACE(*s))
4982 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4986 croak("No comma allowed after %s", what);
4992 new_constant(char *s, STRLEN len, char *key, SV *sv, SV *pv, char *type)
4995 HV *table = GvHV(PL_hintgv); /* ^H */
4998 bool oldcatch = CATCH_GET;
5003 yyerror("%^H is not defined");
5006 cvp = hv_fetch(table, key, strlen(key), FALSE);
5007 if (!cvp || !SvOK(*cvp)) {
5009 sprintf(buf,"$^H{%s} is not defined", key);
5013 sv_2mortal(sv); /* Parent created it permanently */
5016 pv = sv_2mortal(newSVpvn(s, len));
5018 typesv = sv_2mortal(newSVpv(type, 0));
5020 typesv = &PL_sv_undef;
5022 Zero(&myop, 1, BINOP);
5023 myop.op_last = (OP *) &myop;
5024 myop.op_next = Nullop;
5025 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
5027 PUSHSTACKi(PERLSI_OVERLOAD);
5030 PL_op = (OP *) &myop;
5031 if (PERLDB_SUB && PL_curstash != PL_debstash)
5032 PL_op->op_private |= OPpENTERSUB_DB;
5043 if (PL_op = pp_entersub(ARGS))
5050 CATCH_SET(oldcatch);
5055 sprintf(buf,"Call to &{$^H{%s}} did not return a defined value", key);
5058 return SvREFCNT_inc(res);
5062 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
5064 register char *d = dest;
5065 register char *e = d + destlen - 3; /* two-character token, ending NUL */
5068 croak(ident_too_long);
5069 if (isALNUM(*s)) /* UTF handled below */
5071 else if (*s == '\'' && allow_package && isIDFIRST_lazy(s+1)) {
5076 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
5080 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5081 char *t = s + UTF8SKIP(s);
5082 while (*t & 0x80 && is_utf8_mark((U8*)t))
5084 if (d + (t - s) > e)
5085 croak(ident_too_long);
5086 Copy(s, d, t - s, char);
5099 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
5106 if (PL_lex_brackets == 0)
5107 PL_lex_fakebrack = 0;
5111 e = d + destlen - 3; /* two-character token, ending NUL */
5113 while (isDIGIT(*s)) {
5115 croak(ident_too_long);
5122 croak(ident_too_long);
5123 if (isALNUM(*s)) /* UTF handled below */
5125 else if (*s == '\'' && isIDFIRST_lazy(s+1)) {
5130 else if (*s == ':' && s[1] == ':') {
5134 else if (UTF && *(U8*)s >= 0xc0 && isALNUM_utf8((U8*)s)) {
5135 char *t = s + UTF8SKIP(s);
5136 while (*t & 0x80 && is_utf8_mark((U8*)t))
5138 if (d + (t - s) > e)
5139 croak(ident_too_long);
5140 Copy(s, d, t - s, char);
5151 if (PL_lex_state != LEX_NORMAL)
5152 PL_lex_state = LEX_INTERPENDMAYBE;
5155 if (*s == '$' && s[1] &&
5156 (isALNUM_lazy(s+1) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5169 if (*d == '^' && *s && isCONTROLVAR(*s)) {
5174 if (isSPACE(s[-1])) {
5177 if (ch != ' ' && ch != '\t') {
5183 if (isIDFIRST_lazy(d)) {
5187 while (e < send && isALNUM_lazy(e) || *e == ':') {
5189 while (e < send && *e & 0x80 && is_utf8_mark((U8*)e))
5192 Copy(s, d, e - s, char);
5197 while ((isALNUM(*s) || *s == ':') && d < e)
5200 croak(ident_too_long);
5203 while (s < send && (*s == ' ' || *s == '\t')) s++;
5204 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
5205 dTHR; /* only for ckWARN */
5206 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
5207 char *brack = *s == '[' ? "[...]" : "{...}";
5208 warner(WARN_AMBIGUOUS,
5209 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
5210 funny, dest, brack, funny, dest, brack);
5212 PL_lex_fakebrack = PL_lex_brackets+1;
5214 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
5218 /* Handle extended ${^Foo} variables
5219 * 1999-02-27 mjd-perl-patch@plover.com */
5220 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
5224 while (isALNUM(*s) && d < e) {
5228 croak(ident_too_long);
5233 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
5234 PL_lex_state = LEX_INTERPEND;
5237 if (PL_lex_state == LEX_NORMAL) {
5238 dTHR; /* only for ckWARN */
5239 if (ckWARN(WARN_AMBIGUOUS) &&
5240 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
5242 warner(WARN_AMBIGUOUS,
5243 "Ambiguous use of %c{%s} resolved to %c%s",
5244 funny, dest, funny, dest);
5249 s = bracket; /* let the parser handle it */
5253 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
5254 PL_lex_state = LEX_INTERPEND;
5258 void pmflag(U16 *pmfl, int ch)
5263 *pmfl |= PMf_GLOBAL;
5265 *pmfl |= PMf_CONTINUE;
5269 *pmfl |= PMf_MULTILINE;
5271 *pmfl |= PMf_SINGLELINE;
5273 *pmfl |= PMf_EXTENDED;
5277 scan_pat(char *start, I32 type)
5282 s = scan_str(start);
5285 SvREFCNT_dec(PL_lex_stuff);
5286 PL_lex_stuff = Nullsv;
5287 croak("Search pattern not terminated");
5290 pm = (PMOP*)newPMOP(type, 0);
5291 if (PL_multi_open == '?')
5292 pm->op_pmflags |= PMf_ONCE;
5294 while (*s && strchr("iomsx", *s))
5295 pmflag(&pm->op_pmflags,*s++);
5298 while (*s && strchr("iogcmsx", *s))
5299 pmflag(&pm->op_pmflags,*s++);
5301 pm->op_pmpermflags = pm->op_pmflags;
5303 PL_lex_op = (OP*)pm;
5304 yylval.ival = OP_MATCH;
5309 scan_subst(char *start)
5316 yylval.ival = OP_NULL;
5318 s = scan_str(start);
5322 SvREFCNT_dec(PL_lex_stuff);
5323 PL_lex_stuff = Nullsv;
5324 croak("Substitution pattern not terminated");
5327 if (s[-1] == PL_multi_open)
5330 first_start = PL_multi_start;
5334 SvREFCNT_dec(PL_lex_stuff);
5335 PL_lex_stuff = Nullsv;
5337 SvREFCNT_dec(PL_lex_repl);
5338 PL_lex_repl = Nullsv;
5339 croak("Substitution replacement not terminated");
5341 PL_multi_start = first_start; /* so whole substitution is taken together */
5343 pm = (PMOP*)newPMOP(OP_SUBST, 0);
5349 else if (strchr("iogcmsx", *s))
5350 pmflag(&pm->op_pmflags,*s++);
5357 PL_sublex_info.super_bufptr = s;
5358 PL_sublex_info.super_bufend = PL_bufend;
5360 pm->op_pmflags |= PMf_EVAL;
5361 repl = newSVpvn("",0);
5363 sv_catpv(repl, es ? "eval " : "do ");
5364 sv_catpvn(repl, "{ ", 2);
5365 sv_catsv(repl, PL_lex_repl);
5366 sv_catpvn(repl, " };", 2);
5368 SvREFCNT_dec(PL_lex_repl);
5372 pm->op_pmpermflags = pm->op_pmflags;
5373 PL_lex_op = (OP*)pm;
5374 yylval.ival = OP_SUBST;
5379 scan_trans(char *start)
5390 yylval.ival = OP_NULL;
5392 s = scan_str(start);
5395 SvREFCNT_dec(PL_lex_stuff);
5396 PL_lex_stuff = Nullsv;
5397 croak("Transliteration pattern not terminated");
5399 if (s[-1] == PL_multi_open)
5405 SvREFCNT_dec(PL_lex_stuff);
5406 PL_lex_stuff = Nullsv;
5408 SvREFCNT_dec(PL_lex_repl);
5409 PL_lex_repl = Nullsv;
5410 croak("Transliteration replacement not terminated");
5414 o = newSVOP(OP_TRANS, 0, 0);
5415 utf8 = OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF;
5418 New(803,tbl,256,short);
5419 o = newPVOP(OP_TRANS, 0, (char*)tbl);
5423 complement = del = squash = 0;
5424 while (strchr("cdsCU", *s)) {
5426 complement = OPpTRANS_COMPLEMENT;
5428 del = OPpTRANS_DELETE;
5430 squash = OPpTRANS_SQUASH;
5435 utf8 &= ~OPpTRANS_FROM_UTF;
5437 utf8 |= OPpTRANS_FROM_UTF;
5441 utf8 &= ~OPpTRANS_TO_UTF;
5443 utf8 |= OPpTRANS_TO_UTF;
5446 croak("Too many /C and /U options");
5451 o->op_private = del|squash|complement|utf8;
5454 yylval.ival = OP_TRANS;
5459 scan_heredoc(register char *s)
5463 I32 op_type = OP_SCALAR;
5470 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
5474 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
5477 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
5478 if (*peek && strchr("`'\"",*peek)) {
5481 s = delimcpy(d, e, s, PL_bufend, term, &len);
5491 if (!isALNUM_lazy(s))
5492 deprecate("bare << to mean <<\"\"");
5493 for (; isALNUM_lazy(s); s++) {
5498 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
5499 croak("Delimiter for here document is too long");
5502 len = d - PL_tokenbuf;
5503 #ifndef PERL_STRICT_CR
5504 d = strchr(s, '\r');
5508 while (s < PL_bufend) {
5514 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
5523 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
5528 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
5529 herewas = newSVpvn(s,PL_bufend-s);
5531 s--, herewas = newSVpvn(s,d-s);
5532 s += SvCUR(herewas);
5534 tmpstr = NEWSV(87,79);
5535 sv_upgrade(tmpstr, SVt_PVIV);
5540 else if (term == '`') {
5541 op_type = OP_BACKTICK;
5542 SvIVX(tmpstr) = '\\';
5546 PL_multi_start = PL_curcop->cop_line;
5547 PL_multi_open = PL_multi_close = '<';
5548 term = *PL_tokenbuf;
5549 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
5550 char *bufptr = PL_sublex_info.super_bufptr;
5551 char *bufend = PL_sublex_info.super_bufend;
5552 char *olds = s - SvCUR(herewas);
5553 s = strchr(bufptr, '\n');
5557 while (s < bufend &&
5558 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
5560 PL_curcop->cop_line++;
5563 PL_curcop->cop_line = PL_multi_start;
5564 missingterm(PL_tokenbuf);
5566 sv_setpvn(herewas,bufptr,d-bufptr+1);
5567 sv_setpvn(tmpstr,d+1,s-d);
5569 sv_catpvn(herewas,s,bufend-s);
5570 (void)strcpy(bufptr,SvPVX(herewas));
5577 while (s < PL_bufend &&
5578 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
5580 PL_curcop->cop_line++;
5582 if (s >= PL_bufend) {
5583 PL_curcop->cop_line = PL_multi_start;
5584 missingterm(PL_tokenbuf);
5586 sv_setpvn(tmpstr,d+1,s-d);
5588 PL_curcop->cop_line++; /* the preceding stmt passes a newline */
5590 sv_catpvn(herewas,s,PL_bufend-s);
5591 sv_setsv(PL_linestr,herewas);
5592 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
5593 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5596 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
5597 while (s >= PL_bufend) { /* multiple line string? */
5599 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
5600 PL_curcop->cop_line = PL_multi_start;
5601 missingterm(PL_tokenbuf);
5603 PL_curcop->cop_line++;
5604 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5605 #ifndef PERL_STRICT_CR
5606 if (PL_bufend - PL_linestart >= 2) {
5607 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
5608 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
5610 PL_bufend[-2] = '\n';
5612 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
5614 else if (PL_bufend[-1] == '\r')
5615 PL_bufend[-1] = '\n';
5617 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
5618 PL_bufend[-1] = '\n';
5620 if (PERLDB_LINE && PL_curstash != PL_debstash) {
5621 SV *sv = NEWSV(88,0);
5623 sv_upgrade(sv, SVt_PVMG);
5624 sv_setsv(sv,PL_linestr);
5625 av_store(GvAV(PL_curcop->cop_filegv),
5626 (I32)PL_curcop->cop_line,sv);
5628 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
5631 sv_catsv(PL_linestr,herewas);
5632 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5636 sv_catsv(tmpstr,PL_linestr);
5641 PL_multi_end = PL_curcop->cop_line;
5642 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
5643 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
5644 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
5646 SvREFCNT_dec(herewas);
5647 PL_lex_stuff = tmpstr;
5648 yylval.ival = op_type;
5653 takes: current position in input buffer
5654 returns: new position in input buffer
5655 side-effects: yylval and lex_op are set.
5660 <FH> read from filehandle
5661 <pkg::FH> read from package qualified filehandle
5662 <pkg'FH> read from package qualified filehandle
5663 <$fh> read from filehandle in $fh
5669 scan_inputsymbol(char *start)
5671 register char *s = start; /* current position in buffer */
5677 d = PL_tokenbuf; /* start of temp holding space */
5678 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
5679 end = strchr(s, '\n');
5682 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
5684 /* die if we didn't have space for the contents of the <>,
5685 or if it didn't end, or if we see a newline
5688 if (len >= sizeof PL_tokenbuf)
5689 croak("Excessively long <> operator");
5691 croak("Unterminated <> operator");
5696 Remember, only scalar variables are interpreted as filehandles by
5697 this code. Anything more complex (e.g., <$fh{$num}>) will be
5698 treated as a glob() call.
5699 This code makes use of the fact that except for the $ at the front,
5700 a scalar variable and a filehandle look the same.
5702 if (*d == '$' && d[1]) d++;
5704 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
5705 while (*d && (isALNUM_lazy(d) || *d == '\'' || *d == ':'))
5708 /* If we've tried to read what we allow filehandles to look like, and
5709 there's still text left, then it must be a glob() and not a getline.
5710 Use scan_str to pull out the stuff between the <> and treat it
5711 as nothing more than a string.
5714 if (d - PL_tokenbuf != len) {
5715 yylval.ival = OP_GLOB;
5717 s = scan_str(start);
5719 croak("Glob not terminated");
5723 /* we're in a filehandle read situation */
5726 /* turn <> into <ARGV> */
5728 (void)strcpy(d,"ARGV");
5730 /* if <$fh>, create the ops to turn the variable into a
5736 /* try to find it in the pad for this block, otherwise find
5737 add symbol table ops
5739 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
5740 OP *o = newOP(OP_PADSV, 0);
5742 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
5745 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
5746 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
5747 newUNOP(OP_RV2SV, 0,
5748 newGVOP(OP_GV, 0, gv)));
5750 PL_lex_op->op_flags |= OPf_SPECIAL;
5751 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
5752 yylval.ival = OP_NULL;
5755 /* If it's none of the above, it must be a literal filehandle
5756 (<Foo::BAR> or <FOO>) so build a simple readline OP */
5758 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
5759 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
5760 yylval.ival = OP_NULL;
5769 takes: start position in buffer
5770 returns: position to continue reading from buffer
5771 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
5772 updates the read buffer.
5774 This subroutine pulls a string out of the input. It is called for:
5775 q single quotes q(literal text)
5776 ' single quotes 'literal text'
5777 qq double quotes qq(interpolate $here please)
5778 " double quotes "interpolate $here please"
5779 qx backticks qx(/bin/ls -l)
5780 ` backticks `/bin/ls -l`
5781 qw quote words @EXPORT_OK = qw( func() $spam )
5782 m// regexp match m/this/
5783 s/// regexp substitute s/this/that/
5784 tr/// string transliterate tr/this/that/
5785 y/// string transliterate y/this/that/
5786 ($*@) sub prototypes sub foo ($)
5787 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
5789 In most of these cases (all but <>, patterns and transliterate)
5790 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
5791 calls scan_str(). s/// makes yylex() call scan_subst() which calls
5792 scan_str(). tr/// and y/// make yylex() call scan_trans() which
5795 It skips whitespace before the string starts, and treats the first
5796 character as the delimiter. If the delimiter is one of ([{< then
5797 the corresponding "close" character )]}> is used as the closing
5798 delimiter. It allows quoting of delimiters, and if the string has
5799 balanced delimiters ([{<>}]) it allows nesting.
5801 The lexer always reads these strings into lex_stuff, except in the
5802 case of the operators which take *two* arguments (s/// and tr///)
5803 when it checks to see if lex_stuff is full (presumably with the 1st
5804 arg to s or tr) and if so puts the string into lex_repl.
5809 scan_str(char *start)
5812 SV *sv; /* scalar value: string */
5813 char *tmps; /* temp string, used for delimiter matching */
5814 register char *s = start; /* current position in the buffer */
5815 register char term; /* terminating character */
5816 register char *to; /* current position in the sv's data */
5817 I32 brackets = 1; /* bracket nesting level */
5819 /* skip space before the delimiter */
5823 /* mark where we are, in case we need to report errors */
5826 /* after skipping whitespace, the next character is the terminator */
5828 /* mark where we are */
5829 PL_multi_start = PL_curcop->cop_line;
5830 PL_multi_open = term;
5832 /* find corresponding closing delimiter */
5833 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
5835 PL_multi_close = term;
5837 /* create a new SV to hold the contents. 87 is leak category, I'm
5838 assuming. 79 is the SV's initial length. What a random number. */
5840 sv_upgrade(sv, SVt_PVIV);
5842 (void)SvPOK_only(sv); /* validate pointer */
5844 /* move past delimiter and try to read a complete string */
5847 /* extend sv if need be */
5848 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
5849 /* set 'to' to the next character in the sv's string */
5850 to = SvPVX(sv)+SvCUR(sv);
5852 /* if open delimiter is the close delimiter read unbridle */
5853 if (PL_multi_open == PL_multi_close) {
5854 for (; s < PL_bufend; s++,to++) {
5855 /* embedded newlines increment the current line number */
5856 if (*s == '\n' && !PL_rsfp)
5857 PL_curcop->cop_line++;
5858 /* handle quoted delimiters */
5859 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
5862 /* any other quotes are simply copied straight through */
5866 /* terminate when run out of buffer (the for() condition), or
5867 have found the terminator */
5868 else if (*s == term)
5874 /* if the terminator isn't the same as the start character (e.g.,
5875 matched brackets), we have to allow more in the quoting, and
5876 be prepared for nested brackets.
5879 /* read until we run out of string, or we find the terminator */
5880 for (; s < PL_bufend; s++,to++) {
5881 /* embedded newlines increment the line count */
5882 if (*s == '\n' && !PL_rsfp)
5883 PL_curcop->cop_line++;
5884 /* backslashes can escape the open or closing characters */
5885 if (*s == '\\' && s+1 < PL_bufend) {
5886 if ((s[1] == PL_multi_open) || (s[1] == PL_multi_close))
5891 /* allow nested opens and closes */
5892 else if (*s == PL_multi_close && --brackets <= 0)
5894 else if (*s == PL_multi_open)
5899 /* terminate the copied string and update the sv's end-of-string */
5901 SvCUR_set(sv, to - SvPVX(sv));
5904 * this next chunk reads more into the buffer if we're not done yet
5907 if (s < PL_bufend) break; /* handle case where we are done yet :-) */
5909 #ifndef PERL_STRICT_CR
5910 if (to - SvPVX(sv) >= 2) {
5911 if ((to[-2] == '\r' && to[-1] == '\n') ||
5912 (to[-2] == '\n' && to[-1] == '\r'))
5916 SvCUR_set(sv, to - SvPVX(sv));
5918 else if (to[-1] == '\r')
5921 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
5925 /* if we're out of file, or a read fails, bail and reset the current
5926 line marker so we can report where the unterminated string began
5929 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
5931 PL_curcop->cop_line = PL_multi_start;
5934 /* we read a line, so increment our line counter */
5935 PL_curcop->cop_line++;
5937 /* update debugger info */
5938 if (PERLDB_LINE && PL_curstash != PL_debstash) {
5939 SV *sv = NEWSV(88,0);
5941 sv_upgrade(sv, SVt_PVMG);
5942 sv_setsv(sv,PL_linestr);
5943 av_store(GvAV(PL_curcop->cop_filegv),
5944 (I32)PL_curcop->cop_line, sv);
5947 /* having changed the buffer, we must update PL_bufend */
5948 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
5951 /* at this point, we have successfully read the delimited string */
5953 PL_multi_end = PL_curcop->cop_line;
5956 /* if we allocated too much space, give some back */
5957 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5958 SvLEN_set(sv, SvCUR(sv) + 1);
5959 Renew(SvPVX(sv), SvLEN(sv), char);
5962 /* decide whether this is the first or second quoted string we've read
5975 takes: pointer to position in buffer
5976 returns: pointer to new position in buffer
5977 side-effects: builds ops for the constant in yylval.op
5979 Read a number in any of the formats that Perl accepts:
5981 0(x[0-7A-F]+)|([0-7]+)|(b[01])
5982 [\d_]+(\.[\d_]*)?[Ee](\d+)
5984 Underbars (_) are allowed in decimal numbers. If -w is on,
5985 underbars before a decimal point must be at three digit intervals.
5987 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
5990 If it reads a number without a decimal point or an exponent, it will
5991 try converting the number to an integer and see if it can do so
5992 without loss of precision.
5996 scan_num(char *start)
5998 register char *s = start; /* current position in buffer */
5999 register char *d; /* destination in temp buffer */
6000 register char *e; /* end of temp buffer */
6001 I32 tryiv; /* used to see if it can be an int */
6002 double value; /* number read, as a double */
6003 SV *sv; /* place to put the converted number */
6004 I32 floatit; /* boolean: int or float? */
6005 char *lastub = 0; /* position of last underbar */
6006 static char number_too_long[] = "Number too long";
6008 /* We use the first character to decide what type of number this is */
6012 croak("panic: scan_num");
6014 /* if it starts with a 0, it could be an octal number, a decimal in
6015 0.13 disguise, or a hexadecimal number, or a binary number.
6020 u holds the "number so far"
6021 shift the power of 2 of the base
6022 (hex == 4, octal == 3, binary == 1)
6023 overflowed was the number more than we can hold?
6025 Shift is used when we add a digit. It also serves as an "are
6026 we in octal/hex/binary?" indicator to disallow hex characters
6031 bool overflowed = FALSE;
6037 } else if (s[1] == 'b') {
6041 /* check for a decimal in disguise */
6042 else if (s[1] == '.')
6044 /* so it must be octal */
6049 /* read the rest of the number */
6051 UV n, b; /* n is used in the overflow test, b is the digit we're adding on */
6055 /* if we don't mention it, we're done */
6064 /* 8 and 9 are not octal */
6067 yyerror(form("Illegal octal digit '%c'", *s));
6070 yyerror(form("Illegal binary digit '%c'", *s));
6074 case '2': case '3': case '4':
6075 case '5': case '6': case '7':
6077 yyerror(form("Illegal binary digit '%c'", *s));
6081 b = *s++ & 15; /* ASCII digit -> value of digit */
6085 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
6086 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
6087 /* make sure they said 0x */
6092 /* Prepare to put the digit we have onto the end
6093 of the number so far. We check for overflows.
6097 n = u << shift; /* make room for the digit */
6098 if (!overflowed && (n >> shift) != u
6099 && !(PL_hints & HINT_NEW_BINARY)) {
6100 warn("Integer overflow in %s number",
6101 (shift == 4) ? "hex"
6102 : ((shift == 3) ? "octal" : "binary"));
6105 u = n | b; /* add the digit to the end */
6110 /* if we get here, we had success: make a scalar value from
6116 if ( PL_hints & HINT_NEW_BINARY)
6117 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
6122 handle decimal numbers.
6123 we're also sent here when we read a 0 as the first digit
6125 case '1': case '2': case '3': case '4': case '5':
6126 case '6': case '7': case '8': case '9': case '.':
6129 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
6132 /* read next group of digits and _ and copy into d */
6133 while (isDIGIT(*s) || *s == '_') {
6134 /* skip underscores, checking for misplaced ones
6138 dTHR; /* only for ckWARN */
6139 if (ckWARN(WARN_SYNTAX) && lastub && s - lastub != 3)
6140 warner(WARN_SYNTAX, "Misplaced _ in number");
6144 /* check for end of fixed-length buffer */
6146 croak(number_too_long);
6147 /* if we're ok, copy the character */
6152 /* final misplaced underbar check */
6153 if (lastub && s - lastub != 3) {
6155 if (ckWARN(WARN_SYNTAX))
6156 warner(WARN_SYNTAX, "Misplaced _ in number");
6159 /* read a decimal portion if there is one. avoid
6160 3..5 being interpreted as the number 3. followed
6163 if (*s == '.' && s[1] != '.') {
6167 /* copy, ignoring underbars, until we run out of
6168 digits. Note: no misplaced underbar checks!
6170 for (; isDIGIT(*s) || *s == '_'; s++) {
6171 /* fixed length buffer check */
6173 croak(number_too_long);
6179 /* read exponent part, if present */
6180 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
6184 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
6185 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
6187 /* allow positive or negative exponent */
6188 if (*s == '+' || *s == '-')
6191 /* read digits of exponent (no underbars :-) */
6192 while (isDIGIT(*s)) {
6194 croak(number_too_long);
6199 /* terminate the string */
6202 /* make an sv from the string */
6204 /* reset numeric locale in case we were earlier left in Swaziland */
6205 SET_NUMERIC_STANDARD();
6206 value = atof(PL_tokenbuf);
6209 See if we can make do with an integer value without loss of
6210 precision. We use I_V to cast to an int, because some
6211 compilers have issues. Then we try casting it back and see
6212 if it was the same. We only do this if we know we
6213 specifically read an integer.
6215 Note: if floatit is true, then we don't need to do the
6219 if (!floatit && (double)tryiv == value)
6220 sv_setiv(sv, tryiv);
6222 sv_setnv(sv, value);
6223 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) : (PL_hints & HINT_NEW_INTEGER) )
6224 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
6225 (floatit ? "float" : "integer"), sv, Nullsv, NULL);
6229 /* make the op for the constant and return */
6231 yylval.opval = newSVOP(OP_CONST, 0, sv);
6237 scan_formline(register char *s)
6242 SV *stuff = newSVpvn("",0);
6243 bool needargs = FALSE;
6246 if (*s == '.' || *s == '}') {
6248 #ifdef PERL_STRICT_CR
6249 for (t = s+1;*t == ' ' || *t == '\t'; t++) ;
6251 for (t = s+1;*t == ' ' || *t == '\t' || *t == '\r'; t++) ;
6253 if (*t == '\n' || t == PL_bufend)
6256 if (PL_in_eval && !PL_rsfp) {
6257 eol = strchr(s,'\n');
6262 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
6264 for (t = s; t < eol; t++) {
6265 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
6267 goto enough; /* ~~ must be first line in formline */
6269 if (*t == '@' || *t == '^')
6272 sv_catpvn(stuff, s, eol-s);
6276 s = filter_gets(PL_linestr, PL_rsfp, 0);
6277 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
6278 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
6281 yyerror("Format not terminated");
6291 PL_lex_state = LEX_NORMAL;
6292 PL_nextval[PL_nexttoke].ival = 0;
6296 PL_lex_state = LEX_FORMLINE;
6297 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
6299 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
6303 SvREFCNT_dec(stuff);
6304 PL_lex_formbrack = 0;
6315 PL_cshlen = strlen(PL_cshname);
6320 start_subparse(I32 is_format, U32 flags)
6323 I32 oldsavestack_ix = PL_savestack_ix;
6324 CV* outsidecv = PL_compcv;
6328 assert(SvTYPE(PL_compcv) == SVt_PVCV);
6330 save_I32(&PL_subline);
6331 save_item(PL_subname);
6333 SAVESPTR(PL_curpad);
6334 SAVESPTR(PL_comppad);
6335 SAVESPTR(PL_comppad_name);
6336 SAVESPTR(PL_compcv);
6337 SAVEI32(PL_comppad_name_fill);
6338 SAVEI32(PL_min_intro_pending);
6339 SAVEI32(PL_max_intro_pending);
6340 SAVEI32(PL_pad_reset_pending);
6342 PL_compcv = (CV*)NEWSV(1104,0);
6343 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
6344 CvFLAGS(PL_compcv) |= flags;
6346 PL_comppad = newAV();
6347 av_push(PL_comppad, Nullsv);
6348 PL_curpad = AvARRAY(PL_comppad);
6349 PL_comppad_name = newAV();
6350 PL_comppad_name_fill = 0;
6351 PL_min_intro_pending = 0;
6353 PL_subline = PL_curcop->cop_line;
6355 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
6356 PL_curpad[0] = (SV*)newAV();
6357 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
6358 #endif /* USE_THREADS */
6360 comppadlist = newAV();
6361 AvREAL_off(comppadlist);
6362 av_store(comppadlist, 0, (SV*)PL_comppad_name);
6363 av_store(comppadlist, 1, (SV*)PL_comppad);
6365 CvPADLIST(PL_compcv) = comppadlist;
6366 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
6368 CvOWNER(PL_compcv) = 0;
6369 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
6370 MUTEX_INIT(CvMUTEXP(PL_compcv));
6371 #endif /* USE_THREADS */
6373 return oldsavestack_ix;
6392 char *context = NULL;
6396 if (!yychar || (yychar == ';' && !PL_rsfp))
6398 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
6399 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
6400 while (isSPACE(*PL_oldoldbufptr))
6402 context = PL_oldoldbufptr;
6403 contlen = PL_bufptr - PL_oldoldbufptr;
6405 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
6406 PL_oldbufptr != PL_bufptr) {
6407 while (isSPACE(*PL_oldbufptr))
6409 context = PL_oldbufptr;
6410 contlen = PL_bufptr - PL_oldbufptr;
6412 else if (yychar > 255)
6413 where = "next token ???";
6414 else if ((yychar & 127) == 127) {
6415 if (PL_lex_state == LEX_NORMAL ||
6416 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
6417 where = "at end of line";
6418 else if (PL_lex_inpat)
6419 where = "within pattern";
6421 where = "within string";
6424 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
6426 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
6427 else if (isPRINT_LC(yychar))
6428 sv_catpvf(where_sv, "%c", yychar);
6430 sv_catpvf(where_sv, "\\%03o", yychar & 255);
6431 where = SvPVX(where_sv);
6433 msg = sv_2mortal(newSVpv(s, 0));
6434 sv_catpvf(msg, " at %_ line %ld, ",
6435 GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
6437 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
6439 sv_catpvf(msg, "%s\n", where);
6440 if (PL_multi_start < PL_multi_end && (U32)(PL_curcop->cop_line - PL_multi_end) <= 1) {
6442 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
6443 (int)PL_multi_open,(int)PL_multi_close,(long)PL_multi_start);
6448 else if (PL_in_eval)
6449 sv_catsv(ERRSV, msg);
6451 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
6452 if (++PL_error_count >= 10)
6453 croak("%_ has too many errors.\n", GvSV(PL_curcop->cop_filegv));
6455 PL_in_my_stash = Nullhv;