3 * Copyright (c) 1991-1997, 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 static void check_uni _((void));
18 static void force_next _((I32 type));
19 static char *force_version _((char *start));
20 static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
21 static SV *q _((SV *sv));
22 static char *scan_const _((char *start));
23 static char *scan_formline _((char *s));
24 static char *scan_heredoc _((char *s));
25 static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
27 static char *scan_inputsymbol _((char *start));
28 static char *scan_pat _((char *start));
29 static char *scan_str _((char *start));
30 static char *scan_subst _((char *start));
31 static char *scan_trans _((char *start));
32 static char *scan_word _((char *s, char *dest, STRLEN destlen,
33 int allow_package, STRLEN *slp));
34 static char *skipspace _((char *s));
35 static void checkcomma _((char *s, char *name, char *what));
36 static void force_ident _((char *s, int kind));
37 static void incline _((char *s));
38 static int intuit_method _((char *s, GV *gv));
39 static int intuit_more _((char *s));
40 static I32 lop _((I32 f, expectation x, char *s));
41 static void missingterm _((char *s));
42 static void no_op _((char *what, char *s));
43 static void set_csh _((void));
44 static I32 sublex_done _((void));
45 static I32 sublex_push _((void));
46 static I32 sublex_start _((void));
48 static int uni _((I32 f, char *s));
50 static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
51 static void restore_rsfp _((void *f));
52 static void restore_expect _((void *e));
53 static void restore_lex_expect _((void *e));
55 static char ident_too_long[] = "Identifier too long";
57 static char *linestart; /* beg. of most recently read line */
59 static char pending_ident; /* pending identifier lookup */
62 I32 super_state; /* lexer state to save */
63 I32 sub_inwhat; /* "lex_inwhat" to use */
64 OP *sub_op; /* "lex_op" to use */
67 /* The following are arranged oddly so that the guard on the switch statement
68 * can get by with a single comparison (if the compiler is smart enough).
71 /* #define LEX_NOTPARSING 11 is done in perl.h. */
74 #define LEX_INTERPNORMAL 9
75 #define LEX_INTERPCASEMOD 8
76 #define LEX_INTERPPUSH 7
77 #define LEX_INTERPSTART 6
78 #define LEX_INTERPEND 5
79 #define LEX_INTERPENDMAYBE 4
80 #define LEX_INTERPCONCAT 3
81 #define LEX_INTERPCONST 2
82 #define LEX_FORMLINE 1
83 #define LEX_KNOWNEXT 0
92 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
94 # include <unistd.h> /* Needed for execv() */
102 #include "keywords.h"
107 #define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
109 #define TOKEN(retval) return (bufptr = s,(int)retval)
110 #define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
111 #define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
112 #define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
113 #define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
114 #define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
115 #define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
116 #define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
117 #define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
118 #define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
119 #define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
120 #define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
121 #define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
122 #define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
123 #define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
124 #define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
125 #define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
126 #define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
127 #define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
128 #define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
130 /* This bit of chicanery makes a unary function followed by
131 * a parenthesis into a function with one argument, highest precedence.
133 #define UNI(f) return(yylval.ival = f, \
136 last_uni = oldbufptr, \
138 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
140 #define UNIBRACK(f) return(yylval.ival = f, \
142 last_uni = oldbufptr, \
143 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
145 /* grandfather return to old style */
146 #define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
151 if (*bufptr == '=') {
153 if (toketype == ANDAND)
154 yylval.ival = OP_ANDASSIGN;
155 else if (toketype == OROR)
156 yylval.ival = OP_ORASSIGN;
163 no_op(char *what, char *s)
165 char *oldbp = bufptr;
166 bool is_first = (oldbufptr == linestart);
169 yywarn(form("%s found where operator expected", what));
171 warn("\t(Missing semicolon on previous line?)\n");
172 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
174 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
175 if (t < bufptr && isSPACE(*t))
176 warn("\t(Do you need to predeclare %.*s?)\n",
177 t - oldoldbufptr, oldoldbufptr);
181 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
191 char *nl = strrchr(s,'\n');
195 else if (multi_close < 32 || multi_close == 127) {
197 tmpbuf[1] = toCTRL(multi_close);
203 *tmpbuf = multi_close;
207 q = strchr(s,'"') ? '\'' : '"';
208 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
215 warn("Use of %s is deprecated", s);
221 deprecate("comma-less variable list");
227 win32_textfilter(int idx, SV *sv, int maxlen)
229 I32 count = FILTER_READ(idx+1, sv, maxlen);
230 if (count > 0 && !maxlen)
231 win32_strip_return(sv);
245 SAVEI32(lex_brackets);
246 SAVEI32(lex_fakebrack);
247 SAVEI32(lex_casemods);
252 SAVEI16(curcop->cop_line);
256 SAVEPPTR(oldoldbufptr);
259 SAVEPPTR(lex_brackstack);
260 SAVEPPTR(lex_casestack);
261 SAVEDESTRUCTOR(restore_rsfp, rsfp);
265 SAVEDESTRUCTOR(restore_expect, tokenbuf + expect); /* encode as pointer */
266 SAVEDESTRUCTOR(restore_lex_expect, tokenbuf + expect);
268 lex_state = LEX_NORMAL;
273 New(899, lex_brackstack, 120, char);
274 New(899, lex_casestack, 12, char);
275 SAVEFREEPV(lex_brackstack);
276 SAVEFREEPV(lex_casestack);
278 *lex_casestack = '\0';
286 if (SvREADONLY(linestr))
287 linestr = sv_2mortal(newSVsv(linestr));
288 s = SvPV(linestr, len);
289 if (len && s[len-1] != ';') {
290 if (!(SvFLAGS(linestr) & SVs_TEMP))
291 linestr = sv_2mortal(newSVsv(linestr));
292 sv_catpvn(linestr, "\n;", 2);
295 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
296 bufend = bufptr + SvCUR(linestr);
298 rs = newSVpv("\n", 1);
309 restore_rsfp(void *f)
311 PerlIO *fp = (PerlIO*)f;
313 if (rsfp == PerlIO_stdin())
314 PerlIO_clearerr(rsfp);
315 else if (rsfp && (rsfp != fp))
324 /* a safe way to store a small integer in a pointer */
325 expect = (expectation)((char *)e - tokenbuf);
329 restore_lex_expect(e)
332 /* a safe way to store a small integer in a pointer */
333 lex_expect = (expectation)((char *)e - tokenbuf);
348 while (*s == ' ' || *s == '\t') s++;
349 if (strnEQ(s, "line ", 5)) {
358 while (*s == ' ' || *s == '\t')
360 if (*s == '"' && (t = strchr(s+1, '"')))
364 return; /* false alarm */
365 for (t = s; !isSPACE(*t); t++) ;
370 curcop->cop_filegv = gv_fetchfile(s);
372 curcop->cop_filegv = gv_fetchfile(origfilename);
374 curcop->cop_line = atoi(n)-1;
378 skipspace(register char *s)
381 if (lex_formbrack && lex_brackets <= lex_formbrack) {
382 while (s < bufend && (*s == ' ' || *s == '\t'))
388 while (s < bufend && isSPACE(*s))
390 if (s < bufend && *s == '#') {
391 while (s < bufend && *s != '\n')
396 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
398 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
399 if (minus_n || minus_p) {
400 sv_setpv(linestr,minus_p ?
401 ";}continue{print or die qq(-p destination: $!\\n)" :
403 sv_catpv(linestr,";}");
404 minus_n = minus_p = 0;
407 sv_setpv(linestr,";");
408 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
409 bufend = SvPVX(linestr) + SvCUR(linestr);
410 if (preprocess && !in_eval)
411 (void)PerlProc_pclose(rsfp);
412 else if ((PerlIO*)rsfp == PerlIO_stdin())
413 PerlIO_clearerr(rsfp);
415 (void)PerlIO_close(rsfp);
421 linestart = bufptr = s + prevlen;
422 bufend = s + SvCUR(linestr);
425 if (PERLDB_LINE && curstash != debstash) {
426 SV *sv = NEWSV(85,0);
428 sv_upgrade(sv, SVt_PVMG);
429 sv_setpvn(sv,bufptr,bufend-bufptr);
430 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
441 if (oldoldbufptr != last_uni)
443 while (isSPACE(*last_uni))
445 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
446 if ((t = strchr(s, '(')) && t < bufptr)
450 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
457 #define UNI(f) return uni(f,s)
465 last_uni = oldbufptr;
476 #endif /* CRIPPLED_CC */
478 #define LOP(f,x) return lop(f,x,s)
483 (I32 f, expectation x, char *s)
489 #endif /* CAN_PROTOTYPE */
496 last_lop = oldbufptr;
512 nexttype[nexttoke] = type;
514 if (lex_state != LEX_KNOWNEXT) {
515 lex_defer = lex_state;
517 lex_state = LEX_KNOWNEXT;
522 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
527 start = skipspace(start);
530 (allow_pack && *s == ':') ||
531 (allow_initial_tick && *s == '\'') )
533 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
534 if (check_keyword && keyword(tokenbuf, len))
536 if (token == METHOD) {
546 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
547 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
554 force_ident(register char *s, int kind)
557 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
558 nextval[nexttoke].opval = o;
561 dTHR; /* just for in_eval */
562 o->op_private = OPpCONST_ENTERED;
563 /* XXX see note in pp_entereval() for why we forgo typo
564 warnings if the symbol must be introduced in an eval.
566 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
567 kind == '$' ? SVt_PV :
568 kind == '@' ? SVt_PVAV :
569 kind == '%' ? SVt_PVHV :
577 force_version(char *s)
579 OP *version = Nullop;
583 /* default VERSION number -- GBARR */
588 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
589 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
591 /* real VERSION number -- GBARR */
592 version = yylval.opval;
596 /* NOTE: The parser sees the package name and the VERSION swapped */
597 nextval[nexttoke].opval = version;
614 s = SvPV_force(sv, len);
618 while (s < send && *s != '\\')
625 if (s + 1 < send && (s[1] == '\\'))
626 s++; /* all that, just for this */
631 SvCUR_set(sv, d - SvPVX(sv));
639 register I32 op_type = yylval.ival;
641 if (op_type == OP_NULL) {
642 yylval.opval = lex_op;
646 if (op_type == OP_CONST || op_type == OP_READLINE) {
647 SV *sv = q(lex_stuff);
649 char *p = SvPV(sv, len);
650 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
656 sublex_info.super_state = lex_state;
657 sublex_info.sub_inwhat = op_type;
658 sublex_info.sub_op = lex_op;
659 lex_state = LEX_INTERPPUSH;
663 yylval.opval = lex_op;
677 lex_state = sublex_info.super_state;
679 SAVEI32(lex_brackets);
680 SAVEI32(lex_fakebrack);
681 SAVEI32(lex_casemods);
686 SAVEI16(curcop->cop_line);
689 SAVEPPTR(oldoldbufptr);
692 SAVEPPTR(lex_brackstack);
693 SAVEPPTR(lex_casestack);
698 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
699 bufend += SvCUR(linestr);
705 New(899, lex_brackstack, 120, char);
706 New(899, lex_casestack, 12, char);
707 SAVEFREEPV(lex_brackstack);
708 SAVEFREEPV(lex_casestack);
710 *lex_casestack = '\0';
712 lex_state = LEX_INTERPCONCAT;
713 curcop->cop_line = multi_start;
715 lex_inwhat = sublex_info.sub_inwhat;
716 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
717 lex_inpat = sublex_info.sub_op;
729 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
733 if (lex_casemods) { /* oops, we've got some unbalanced parens */
734 lex_state = LEX_INTERPCASEMOD;
738 /* Is there a right-hand side to take care of? */
739 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
742 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
743 bufend += SvCUR(linestr);
749 *lex_casestack = '\0';
751 if (SvCOMPILED(lex_repl)) {
752 lex_state = LEX_INTERPNORMAL;
756 lex_state = LEX_INTERPCONCAT;
762 bufend = SvPVX(linestr);
763 bufend += SvCUR(linestr);
770 scan_const(char *start)
772 register char *send = bufend;
773 SV *sv = NEWSV(93, send - start);
774 register char *s = start;
775 register char *d = SvPVX(sv);
776 bool dorange = FALSE;
780 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
781 : (lex_inwhat & OP_TRANS)
785 while (s < send || dorange) {
786 if (lex_inwhat == OP_TRANS) {
791 SvGROW(sv, SvLEN(sv) + 256);
795 for (i = (U8)*d; i <= max; i++)
800 else if (*s == '-' && s+1 < send && s != start) {
805 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
806 while (s < send && *s != ')')
809 else if (*s == '#' && lex_inpat &&
810 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
811 while (s+1 < send && *s != '\n')
814 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
816 else if (*s == '$') {
817 if (!lex_inpat) /* not a regexp, so $ must be var */
819 if (s + 1 < send && !strchr("()| \n\t", s[1]))
820 break; /* in regexp, $ might be tail anchor */
822 if (*s == '\\' && s+1 < send) {
824 if (*s && strchr(leaveit, *s)) {
829 if (lex_inwhat == OP_SUBST && !lex_inpat &&
830 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
833 warn("\\%c better written as $%c", *s, *s);
837 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
843 if (lex_inwhat == OP_TRANS) {
851 case '0': case '1': case '2': case '3':
852 case '4': case '5': case '6': case '7':
853 *d++ = scan_oct(s, 3, &len);
857 *d++ = scan_hex(++s, 2, &len);
893 SvCUR_set(sv, d - SvPVX(sv));
896 if (SvCUR(sv) + 5 < SvLEN(sv)) {
897 SvLEN_set(sv, SvCUR(sv) + 1);
898 Renew(SvPVX(sv), SvLEN(sv), char);
901 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
907 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
909 intuit_more(register char *s)
913 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
915 if (*s != '{' && *s != '[')
920 /* In a pattern, so maybe we have {n,m}. */
937 /* On the other hand, maybe we have a character class */
940 if (*s == ']' || *s == '^')
943 int weight = 2; /* let's weigh the evidence */
945 unsigned char un_char = 0, last_un_char;
946 char *send = strchr(s,']');
947 char tmpbuf[sizeof tokenbuf * 4];
949 if (!send) /* has to be an expression */
955 else if (isDIGIT(*s)) {
957 if (isDIGIT(s[1]) && s[2] == ']')
963 for (; s < send; s++) {
964 last_un_char = un_char;
965 un_char = (unsigned char)*s;
970 weight -= seen[un_char] * 10;
972 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
973 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
978 else if (*s == '$' && s[1] &&
979 strchr("[#!%*<>()-=",s[1])) {
980 if (/*{*/ strchr("])} =",s[2]))
989 if (strchr("wds]",s[1]))
991 else if (seen['\''] || seen['"'])
993 else if (strchr("rnftbxcav",s[1]))
995 else if (isDIGIT(s[1])) {
997 while (s[1] && isDIGIT(s[1]))
1007 if (strchr("aA01! ",last_un_char))
1009 if (strchr("zZ79~",s[1]))
1013 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1014 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1019 if (keyword(tmpbuf, d - tmpbuf))
1022 if (un_char == last_un_char + 1)
1024 weight -= seen[un_char];
1029 if (weight >= 0) /* probably a character class */
1037 intuit_method(char *start, GV *gv)
1039 char *s = start + (*start == '$');
1040 char tmpbuf[sizeof tokenbuf];
1050 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1051 if (*start == '$') {
1052 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1057 return *s == '(' ? FUNCMETH : METHOD;
1059 if (!keyword(tmpbuf, len)) {
1060 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1061 if (indirgv && GvCVu(indirgv))
1063 /* filehandle or package name makes it a method */
1064 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1066 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1067 return 0; /* no assumptions -- "=>" quotes bearword */
1068 nextval[nexttoke].opval =
1069 (OP*)newSVOP(OP_CONST, 0,
1071 nextval[nexttoke].opval->op_private =
1076 return *s == '(' ? FUNCMETH : METHOD;
1086 char *pdb = PerlEnv_getenv("PERL5DB");
1090 SETERRNO(0,SS$_NORMAL);
1091 return "BEGIN { require 'perl5db.pl' }";
1097 /* Encoded script support. filter_add() effectively inserts a
1098 * 'pre-processing' function into the current source input stream.
1099 * Note that the filter function only applies to the current source file
1100 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1102 * The datasv parameter (which may be NULL) can be used to pass
1103 * private data to this instance of the filter. The filter function
1104 * can recover the SV using the FILTER_DATA macro and use it to
1105 * store private buffers and state information.
1107 * The supplied datasv parameter is upgraded to a PVIO type
1108 * and the IoDIRP field is used to store the function pointer.
1109 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1110 * private use must be set using malloc'd pointers.
1112 static int filter_debug = 0;
1115 filter_add(filter_t funcp, SV *datasv)
1117 if (!funcp){ /* temporary handy debugging hack to be deleted */
1118 filter_debug = atoi((char*)datasv);
1122 rsfp_filters = newAV();
1125 if (!SvUPGRADE(datasv, SVt_PVIO))
1126 die("Can't upgrade filter_add data to SVt_PVIO");
1127 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1129 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1130 av_unshift(rsfp_filters, 1);
1131 av_store(rsfp_filters, 0, datasv) ;
1136 /* Delete most recently added instance of this filter function. */
1138 filter_del(filter_t funcp)
1141 warn("filter_del func %p", funcp);
1142 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1144 /* if filter is on top of stack (usual case) just pop it off */
1145 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1146 sv_free(av_pop(rsfp_filters));
1150 /* we need to search for the correct entry and clear it */
1151 die("filter_del can only delete in reverse order (currently)");
1155 /* Invoke the n'th filter function for the current rsfp. */
1157 filter_read(int idx, SV *buf_sv, int maxlen)
1160 /* 0 = read one text line */
1167 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1168 /* Provide a default input filter to make life easy. */
1169 /* Note that we append to the line. This is handy. */
1171 warn("filter_read %d: from rsfp\n", idx);
1175 int old_len = SvCUR(buf_sv) ;
1177 /* ensure buf_sv is large enough */
1178 SvGROW(buf_sv, old_len + maxlen) ;
1179 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1180 if (PerlIO_error(rsfp))
1181 return -1; /* error */
1183 return 0 ; /* end of file */
1185 SvCUR_set(buf_sv, old_len + len) ;
1188 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1189 if (PerlIO_error(rsfp))
1190 return -1; /* error */
1192 return 0 ; /* end of file */
1196 return SvCUR(buf_sv);
1198 /* Skip this filter slot if filter has been deleted */
1199 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1201 warn("filter_read %d: skipped (filter deleted)\n", idx);
1202 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1204 /* Get function pointer hidden within datasv */
1205 funcp = (filter_t)IoDIRP(datasv);
1207 warn("filter_read %d: via function %p (%s)\n",
1208 idx, funcp, SvPV(datasv,na));
1209 /* Call function. The function is expected to */
1210 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1211 /* Return: <0:error, =0:eof, >0:not eof */
1212 return (*funcp)(idx, buf_sv, maxlen);
1217 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1220 if (!rsfp_filters) {
1221 filter_add(win32_textfilter,NULL);
1227 SvCUR_set(sv, 0); /* start with empty line */
1228 if (FILTER_READ(0, sv, 0) > 0)
1229 return ( SvPVX(sv) ) ;
1234 return (sv_gets(sv, fp, append));
1239 static char* exp_name[] =
1240 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1243 EXT int yychar; /* last token */
1256 if (pending_ident) {
1257 char pit = pending_ident;
1261 if (strchr(tokenbuf,':'))
1262 croak(no_myglob,tokenbuf);
1263 yylval.opval = newOP(OP_PADANY, 0);
1264 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1268 if (!strchr(tokenbuf,':')) {
1270 /* Check for single character per-thread SVs */
1271 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1272 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1273 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1275 yylval.opval = newOP(OP_THREADSV, 0);
1276 yylval.opval->op_targ = tmp;
1279 #endif /* USE_THREADS */
1280 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1281 if (last_lop_op == OP_SORT &&
1282 tokenbuf[0] == '$' &&
1283 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1286 for (d = in_eval ? oldoldbufptr : linestart;
1287 d < bufend && *d != '\n';
1290 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1291 croak("Can't use \"my %s\" in sort comparison",
1297 yylval.opval = newOP(OP_PADANY, 0);
1298 yylval.opval->op_targ = tmp;
1303 /* Force them to make up their mind on "@foo". */
1304 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1305 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1306 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1307 yyerror(form("In string, %s now must be written as \\%s",
1308 tokenbuf, tokenbuf));
1311 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1312 yylval.opval->op_private = OPpCONST_ENTERED;
1313 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1314 ((tokenbuf[0] == '$') ? SVt_PV
1315 : (tokenbuf[0] == '@') ? SVt_PVAV
1320 switch (lex_state) {
1322 case LEX_NORMAL: /* Some compilers will produce faster */
1323 case LEX_INTERPNORMAL: /* code if we comment these out. */
1329 yylval = nextval[nexttoke];
1331 lex_state = lex_defer;
1332 expect = lex_expect;
1333 lex_defer = LEX_NORMAL;
1335 return(nexttype[nexttoke]);
1337 case LEX_INTERPCASEMOD:
1339 if (bufptr != bufend && *bufptr != '\\')
1340 croak("panic: INTERPCASEMOD");
1342 if (bufptr == bufend || bufptr[1] == 'E') {
1345 oldmod = lex_casestack[--lex_casemods];
1346 lex_casestack[lex_casemods] = '\0';
1347 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1349 lex_state = LEX_INTERPCONCAT;
1353 if (bufptr != bufend)
1355 lex_state = LEX_INTERPCONCAT;
1360 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1361 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1362 if (strchr("LU", *s) &&
1363 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1365 lex_casestack[--lex_casemods] = '\0';
1368 if (lex_casemods > 10) {
1369 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1370 if (newlb != lex_casestack) {
1372 lex_casestack = newlb;
1375 lex_casestack[lex_casemods++] = *s;
1376 lex_casestack[lex_casemods] = '\0';
1377 lex_state = LEX_INTERPCONCAT;
1378 nextval[nexttoke].ival = 0;
1381 nextval[nexttoke].ival = OP_LCFIRST;
1383 nextval[nexttoke].ival = OP_UCFIRST;
1385 nextval[nexttoke].ival = OP_LC;
1387 nextval[nexttoke].ival = OP_UC;
1389 nextval[nexttoke].ival = OP_QUOTEMETA;
1391 croak("panic: yylex");
1403 case LEX_INTERPPUSH:
1404 return sublex_push();
1406 case LEX_INTERPSTART:
1407 if (bufptr == bufend)
1408 return sublex_done();
1410 lex_dojoin = (*bufptr == '@');
1411 lex_state = LEX_INTERPNORMAL;
1413 nextval[nexttoke].ival = 0;
1416 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1417 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1418 force_next(PRIVATEREF);
1420 force_ident("\"", '$');
1421 #endif /* USE_THREADS */
1422 nextval[nexttoke].ival = 0;
1424 nextval[nexttoke].ival = 0;
1426 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1435 case LEX_INTERPENDMAYBE:
1436 if (intuit_more(bufptr)) {
1437 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1445 lex_state = LEX_INTERPCONCAT;
1449 case LEX_INTERPCONCAT:
1452 croak("panic: INTERPCONCAT");
1454 if (bufptr == bufend)
1455 return sublex_done();
1457 if (SvIVX(linestr) == '\'') {
1458 SV *sv = newSVsv(linestr);
1461 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1465 s = scan_const(bufptr);
1467 lex_state = LEX_INTERPCASEMOD;
1469 lex_state = LEX_INTERPSTART;
1473 nextval[nexttoke] = yylval;
1486 lex_state = LEX_NORMAL;
1487 s = scan_formline(bufptr);
1494 oldoldbufptr = oldbufptr;
1497 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1503 croak("Unrecognized character \\%03o", *s & 255);
1506 goto fake_eof; /* emulate EOF on ^D or ^Z */
1512 yyerror("Missing right bracket");
1516 goto retry; /* ignore stray nulls */
1519 if (!in_eval && !preambled) {
1521 sv_setpv(linestr,incl_perldb());
1523 sv_catpv(linestr,";");
1525 while(AvFILLp(preambleav) >= 0) {
1526 SV *tmpsv = av_shift(preambleav);
1527 sv_catsv(linestr, tmpsv);
1528 sv_catpv(linestr, ";");
1531 sv_free((SV*)preambleav);
1534 if (minus_n || minus_p) {
1535 sv_catpv(linestr, "LINE: while (<>) {");
1537 sv_catpv(linestr,"chomp;");
1539 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1541 GvIMPORTED_AV_on(gv);
1543 if (strchr("/'\"", *splitstr)
1544 && strchr(splitstr + 1, *splitstr))
1545 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1548 s = "'~#\200\1'"; /* surely one char is unused...*/
1549 while (s[1] && strchr(splitstr, *s)) s++;
1551 sv_catpvf(linestr, "@F=split(%s%c",
1552 "q" + (delim == '\''), delim);
1553 for (s = splitstr; *s; s++) {
1555 sv_catpvn(linestr, "\\", 1);
1556 sv_catpvn(linestr, s, 1);
1558 sv_catpvf(linestr, "%c);", delim);
1562 sv_catpv(linestr,"@F=split(' ');");
1565 sv_catpv(linestr, "\n");
1566 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1567 bufend = SvPVX(linestr) + SvCUR(linestr);
1568 if (PERLDB_LINE && curstash != debstash) {
1569 SV *sv = NEWSV(85,0);
1571 sv_upgrade(sv, SVt_PVMG);
1572 sv_setsv(sv,linestr);
1573 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1578 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1581 if (preprocess && !in_eval)
1582 (void)PerlProc_pclose(rsfp);
1583 else if ((PerlIO *)rsfp == PerlIO_stdin())
1584 PerlIO_clearerr(rsfp);
1586 (void)PerlIO_close(rsfp);
1591 if (!in_eval && (minus_n || minus_p)) {
1592 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1593 sv_catpv(linestr,";}");
1594 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1595 bufend = SvPVX(linestr) + SvCUR(linestr);
1596 minus_n = minus_p = 0;
1599 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1600 sv_setpv(linestr,"");
1601 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1604 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1607 /* Incest with pod. */
1608 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1609 sv_setpv(linestr, "");
1610 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1611 bufend = SvPVX(linestr) + SvCUR(linestr);
1616 } while (doextract);
1617 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1618 if (PERLDB_LINE && curstash != debstash) {
1619 SV *sv = NEWSV(85,0);
1621 sv_upgrade(sv, SVt_PVMG);
1622 sv_setsv(sv,linestr);
1623 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1625 bufend = SvPVX(linestr) + SvCUR(linestr);
1626 if (curcop->cop_line == 1) {
1627 while (s < bufend && isSPACE(*s))
1629 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1633 if (*s == '#' && *(s+1) == '!')
1635 #ifdef ALTERNATE_SHEBANG
1637 static char as[] = ALTERNATE_SHEBANG;
1638 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1639 d = s + (sizeof(as) - 1);
1641 #endif /* ALTERNATE_SHEBANG */
1650 while (*d && !isSPACE(*d))
1654 #ifdef ARG_ZERO_IS_SCRIPT
1655 if (ipathend > ipath) {
1657 * HP-UX (at least) sets argv[0] to the script name,
1658 * which makes $^X incorrect. And Digital UNIX and Linux,
1659 * at least, set argv[0] to the basename of the Perl
1660 * interpreter. So, having found "#!", we'll set it right.
1662 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1663 assert(SvPOK(x) || SvGMAGICAL(x));
1664 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1665 sv_setpvn(x, ipath, ipathend - ipath);
1668 TAINT_NOT; /* $^X is always tainted, but that's OK */
1670 #endif /* ARG_ZERO_IS_SCRIPT */
1675 d = instr(s,"perl -");
1677 d = instr(s,"perl");
1678 #ifdef ALTERNATE_SHEBANG
1680 * If the ALTERNATE_SHEBANG on this system starts with a
1681 * character that can be part of a Perl expression, then if
1682 * we see it but not "perl", we're probably looking at the
1683 * start of Perl code, not a request to hand off to some
1684 * other interpreter. Similarly, if "perl" is there, but
1685 * not in the first 'word' of the line, we assume the line
1686 * contains the start of the Perl program.
1688 if (d && *s != '#') {
1690 while (*c && !strchr("; \t\r\n\f\v#", *c))
1693 d = Nullch; /* "perl" not in first word; ignore */
1695 *s = '#'; /* Don't try to parse shebang line */
1697 #endif /* ALTERNATE_SHEBANG */
1702 !instr(s,"indir") &&
1703 instr(origargv[0],"perl"))
1709 while (s < bufend && isSPACE(*s))
1712 Newz(899,newargv,origargc+3,char*);
1714 while (s < bufend && !isSPACE(*s))
1717 Copy(origargv+1, newargv+2, origargc+1, char*);
1722 execv(ipath, newargv);
1723 croak("Can't exec %s", ipath);
1726 U32 oldpdb = perldb;
1727 bool oldn = minus_n;
1728 bool oldp = minus_p;
1730 while (*d && !isSPACE(*d)) d++;
1731 while (*d == ' ' || *d == '\t') d++;
1735 if (*d == 'M' || *d == 'm') {
1737 while (*d && !isSPACE(*d)) d++;
1738 croak("Too late for \"-%.*s\" option",
1741 d = moreswitches(d);
1743 if (PERLDB_LINE && !oldpdb ||
1744 ( minus_n || minus_p ) && !(oldn || oldp) )
1745 /* if we have already added "LINE: while (<>) {",
1746 we must not do it again */
1748 sv_setpv(linestr, "");
1749 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1750 bufend = SvPVX(linestr) + SvCUR(linestr);
1753 (void)gv_fetchfile(origfilename);
1760 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1762 lex_state = LEX_FORMLINE;
1768 warn("Illegal character \\%03o (carriage return)", '\r');
1770 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1772 case ' ': case '\t': case '\f': case 013:
1777 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1779 while (s < d && *s != '\n')
1784 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1786 lex_state = LEX_FORMLINE;
1796 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1801 while (s < bufend && (*s == ' ' || *s == '\t'))
1804 if (strnEQ(s,"=>",2)) {
1806 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1807 (int)tmp, (int)tmp);
1808 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1809 OPERATOR('-'); /* unary minus */
1811 last_uni = oldbufptr;
1812 last_lop_op = OP_FTEREAD; /* good enough */
1814 case 'r': FTST(OP_FTEREAD);
1815 case 'w': FTST(OP_FTEWRITE);
1816 case 'x': FTST(OP_FTEEXEC);
1817 case 'o': FTST(OP_FTEOWNED);
1818 case 'R': FTST(OP_FTRREAD);
1819 case 'W': FTST(OP_FTRWRITE);
1820 case 'X': FTST(OP_FTREXEC);
1821 case 'O': FTST(OP_FTROWNED);
1822 case 'e': FTST(OP_FTIS);
1823 case 'z': FTST(OP_FTZERO);
1824 case 's': FTST(OP_FTSIZE);
1825 case 'f': FTST(OP_FTFILE);
1826 case 'd': FTST(OP_FTDIR);
1827 case 'l': FTST(OP_FTLINK);
1828 case 'p': FTST(OP_FTPIPE);
1829 case 'S': FTST(OP_FTSOCK);
1830 case 'u': FTST(OP_FTSUID);
1831 case 'g': FTST(OP_FTSGID);
1832 case 'k': FTST(OP_FTSVTX);
1833 case 'b': FTST(OP_FTBLK);
1834 case 'c': FTST(OP_FTCHR);
1835 case 't': FTST(OP_FTTTY);
1836 case 'T': FTST(OP_FTTEXT);
1837 case 'B': FTST(OP_FTBINARY);
1838 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1839 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1840 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1842 croak("Unrecognized file test: -%c", (int)tmp);
1849 if (expect == XOPERATOR)
1854 else if (*s == '>') {
1857 if (isIDFIRST(*s)) {
1858 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1866 if (expect == XOPERATOR)
1869 if (isSPACE(*s) || !isSPACE(*bufptr))
1871 OPERATOR('-'); /* unary minus */
1878 if (expect == XOPERATOR)
1883 if (expect == XOPERATOR)
1886 if (isSPACE(*s) || !isSPACE(*bufptr))
1892 if (expect != XOPERATOR) {
1893 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1895 force_ident(tokenbuf, '*');
1908 if (expect == XOPERATOR) {
1913 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1916 yyerror("Final % should be \\% or %name");
1919 pending_ident = '%';
1941 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1942 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1947 if (curcop->cop_line < copline)
1948 copline = curcop->cop_line;
1959 if (lex_brackets <= 0)
1960 yyerror("Unmatched right bracket");
1963 if (lex_state == LEX_INTERPNORMAL) {
1964 if (lex_brackets == 0) {
1965 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1966 lex_state = LEX_INTERPEND;
1973 if (lex_brackets > 100) {
1974 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1975 if (newlb != lex_brackstack) {
1977 lex_brackstack = newlb;
1982 if (lex_formbrack) {
1986 if (oldoldbufptr == last_lop)
1987 lex_brackstack[lex_brackets++] = XTERM;
1989 lex_brackstack[lex_brackets++] = XOPERATOR;
1990 OPERATOR(HASHBRACK);
1992 while (s < bufend && (*s == ' ' || *s == '\t'))
1996 if (d < bufend && *d == '-') {
1999 while (d < bufend && (*d == ' ' || *d == '\t'))
2002 if (d < bufend && isIDFIRST(*d)) {
2003 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
2005 while (d < bufend && (*d == ' ' || *d == '\t'))
2008 char minus = (tokenbuf[0] == '-');
2010 (keyword(tokenbuf + 1, len) ||
2011 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
2012 perl_get_cv(tokenbuf + 1, FALSE) ))
2013 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
2014 tokenbuf + !minus, tokenbuf + !minus);
2015 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2022 lex_brackstack[lex_brackets++] = XSTATE;
2026 lex_brackstack[lex_brackets++] = XOPERATOR;
2031 if (oldoldbufptr == last_lop)
2032 lex_brackstack[lex_brackets++] = XTERM;
2034 lex_brackstack[lex_brackets++] = XOPERATOR;
2037 if (expect == XSTATE) {
2038 lex_brackstack[lex_brackets-1] = XSTATE;
2041 OPERATOR(HASHBRACK);
2043 /* This hack serves to disambiguate a pair of curlies
2044 * as being a block or an anon hash. Normally, expectation
2045 * determines that, but in cases where we're not in a
2046 * position to expect anything in particular (like inside
2047 * eval"") we have to resolve the ambiguity. This code
2048 * covers the case where the first term in the curlies is a
2049 * quoted string. Most other cases need to be explicitly
2050 * disambiguated by prepending a `+' before the opening
2051 * curly in order to force resolution as an anon hash.
2053 * XXX should probably propagate the outer expectation
2054 * into eval"" to rely less on this hack, but that could
2055 * potentially break current behavior of eval"".
2059 if (*s == '\'' || *s == '"' || *s == '`') {
2060 /* common case: get past first string, handling escapes */
2061 for (t++; t < bufend && *t != *s;)
2062 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2066 else if (*s == 'q') {
2069 || ((*t == 'q' || *t == 'x') && ++t < bufend
2070 && !isALNUM(*t)))) {
2072 char open, close, term;
2075 while (t < bufend && isSPACE(*t))
2079 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2083 for (t++; t < bufend; t++) {
2084 if (*t == '\\' && t+1 < bufend && open != '\\')
2086 else if (*t == open)
2090 for (t++; t < bufend; t++) {
2091 if (*t == '\\' && t+1 < bufend)
2093 else if (*t == close && --brackets <= 0)
2095 else if (*t == open)
2101 else if (isALPHA(*s)) {
2102 for (t++; t < bufend && isALNUM(*t); t++) ;
2104 while (t < bufend && isSPACE(*t))
2106 /* if comma follows first term, call it an anon hash */
2107 /* XXX it could be a comma expression with loop modifiers */
2108 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2109 || (*t == '=' && t[1] == '>')))
2110 OPERATOR(HASHBRACK);
2114 lex_brackstack[lex_brackets-1] = XSTATE;
2120 yylval.ival = curcop->cop_line;
2121 if (isSPACE(*s) || *s == '#')
2122 copline = NOLINE; /* invalidate current command line number */
2127 if (lex_brackets <= 0)
2128 yyerror("Unmatched right bracket");
2130 expect = (expectation)lex_brackstack[--lex_brackets];
2131 if (lex_brackets < lex_formbrack)
2133 if (lex_state == LEX_INTERPNORMAL) {
2134 if (lex_brackets == 0) {
2135 if (lex_fakebrack) {
2136 lex_state = LEX_INTERPEND;
2138 return yylex(); /* ignore fake brackets */
2140 if (*s == '-' && s[1] == '>')
2141 lex_state = LEX_INTERPENDMAYBE;
2142 else if (*s != '[' && *s != '{')
2143 lex_state = LEX_INTERPEND;
2146 if (lex_brackets < lex_fakebrack) {
2149 return yylex(); /* ignore fake brackets */
2159 if (expect == XOPERATOR) {
2160 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2168 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2171 force_ident(tokenbuf, '&');
2175 yylval.ival = (OPpENTERSUB_AMPER<<8);
2194 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2195 warn("Reversed %c= operator",(int)tmp);
2197 if (expect == XSTATE && isALPHA(tmp) &&
2198 (s == linestart+1 || s[-2] == '\n') )
2200 if (in_eval && !rsfp) {
2205 if (strnEQ(s,"=cut",4)) {
2222 if (lex_brackets < lex_formbrack) {
2224 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2225 if (*t == '\n' || *t == '#') {
2243 if (expect != XOPERATOR) {
2244 if (s[1] != '<' && !strchr(s,'>'))
2247 s = scan_heredoc(s);
2249 s = scan_inputsymbol(s);
2250 TERM(sublex_start());
2255 SHop(OP_LEFT_SHIFT);
2269 SHop(OP_RIGHT_SHIFT);
2278 if (expect == XOPERATOR) {
2279 if (lex_formbrack && lex_brackets == lex_formbrack) {
2282 return ','; /* grandfather non-comma-format format */
2286 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2287 if (expect == XOPERATOR)
2288 no_op("Array length", bufptr);
2290 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2295 pending_ident = '#';
2299 if (expect == XOPERATOR)
2300 no_op("Scalar", bufptr);
2302 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2305 yyerror("Final $ should be \\$ or $name");
2309 /* This kludge not intended to be bulletproof. */
2310 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2311 yylval.opval = newSVOP(OP_CONST, 0,
2312 newSViv((IV)compiling.cop_arybase));
2313 yylval.opval->op_private = OPpCONST_ARYBASE;
2318 if (lex_state == LEX_NORMAL)
2321 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2327 isSPACE(*t) || isALNUM(*t) || *t == '$';
2330 bufptr = skipspace(bufptr);
2331 while (t < bufend && *t != ']')
2333 warn("Multidimensional syntax %.*s not supported",
2334 (t - bufptr) + 1, bufptr);
2338 else if (*s == '{') {
2340 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2341 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2343 char tmpbuf[sizeof tokenbuf];
2345 for (t++; isSPACE(*t); t++) ;
2346 if (isIDFIRST(*t)) {
2347 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2348 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2349 warn("You need to quote \"%s\"", tmpbuf);
2356 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2357 bool islop = (last_lop == oldoldbufptr);
2358 if (!islop || last_lop_op == OP_GREPSTART)
2360 else if (strchr("$@\"'`q", *s))
2361 expect = XTERM; /* e.g. print $fh "foo" */
2362 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2363 expect = XTERM; /* e.g. print $fh &sub */
2364 else if (isIDFIRST(*s)) {
2365 char tmpbuf[sizeof tokenbuf];
2366 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2367 if (tmp = keyword(tmpbuf, len)) {
2368 /* binary operators exclude handle interpretations */
2380 expect = XTERM; /* e.g. print $fh length() */
2385 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2386 if (gv && GvCVu(gv))
2387 expect = XTERM; /* e.g. print $fh subr() */
2390 else if (isDIGIT(*s))
2391 expect = XTERM; /* e.g. print $fh 3 */
2392 else if (*s == '.' && isDIGIT(s[1]))
2393 expect = XTERM; /* e.g. print $fh .3 */
2394 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2395 expect = XTERM; /* e.g. print $fh -1 */
2396 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2397 expect = XTERM; /* print $fh <<"EOF" */
2399 pending_ident = '$';
2403 if (expect == XOPERATOR)
2406 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2409 yyerror("Final @ should be \\@ or @name");
2412 if (lex_state == LEX_NORMAL)
2414 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2418 /* Warn about @ where they meant $. */
2420 if (*s == '[' || *s == '{') {
2422 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2424 if (*t == '}' || *t == ']') {
2426 bufptr = skipspace(bufptr);
2427 warn("Scalar value %.*s better written as $%.*s",
2428 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2433 pending_ident = '@';
2436 case '/': /* may either be division or pattern */
2437 case '?': /* may either be conditional or pattern */
2438 if (expect != XOPERATOR) {
2439 /* Disable warning on "study /blah/" */
2440 if (oldoldbufptr == last_uni
2441 && (*last_uni != 's' || s - last_uni < 5
2442 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2445 TERM(sublex_start());
2453 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2454 (s == linestart || s[-1] == '\n') ) {
2459 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2465 yylval.ival = OPf_SPECIAL;
2471 if (expect != XOPERATOR)
2476 case '0': case '1': case '2': case '3': case '4':
2477 case '5': case '6': case '7': case '8': case '9':
2479 if (expect == XOPERATOR)
2485 if (expect == XOPERATOR) {
2486 if (lex_formbrack && lex_brackets == lex_formbrack) {
2489 return ','; /* grandfather non-comma-format format */
2495 missingterm((char*)0);
2496 yylval.ival = OP_CONST;
2497 TERM(sublex_start());
2501 if (expect == XOPERATOR) {
2502 if (lex_formbrack && lex_brackets == lex_formbrack) {
2505 return ','; /* grandfather non-comma-format format */
2511 missingterm((char*)0);
2512 yylval.ival = OP_CONST;
2513 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2514 if (*d == '$' || *d == '@' || *d == '\\') {
2515 yylval.ival = OP_STRINGIFY;
2519 TERM(sublex_start());
2523 if (expect == XOPERATOR)
2524 no_op("Backticks",s);
2526 missingterm((char*)0);
2527 yylval.ival = OP_BACKTICK;
2529 TERM(sublex_start());
2533 if (dowarn && lex_inwhat && isDIGIT(*s))
2534 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2535 if (expect == XOPERATOR)
2536 no_op("Backslash",s);
2540 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2579 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2581 /* Some keywords can be followed by any delimiter, including ':' */
2582 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2583 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2584 (tokenbuf[0] == 'q' &&
2585 strchr("qwx", tokenbuf[1]))));
2587 /* x::* is just a word, unless x is "CORE" */
2588 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2592 while (d < bufend && isSPACE(*d))
2593 d++; /* no comments skipped here, or s### is misparsed */
2595 /* Is this a label? */
2596 if (!tmp && expect == XSTATE
2597 && d < bufend && *d == ':' && *(d + 1) != ':') {
2599 yylval.pval = savepv(tokenbuf);
2604 /* Check for keywords */
2605 tmp = keyword(tokenbuf, len);
2607 /* Is this a word before a => operator? */
2608 if (strnEQ(d,"=>",2)) {
2610 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2611 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2612 tokenbuf, tokenbuf);
2613 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2614 yylval.opval->op_private = OPpCONST_BARE;
2618 if (tmp < 0) { /* second-class keyword? */
2619 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2620 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2621 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2622 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2623 (gv = *gvp) != (GV*)&sv_undef &&
2624 GvCVu(gv) && GvIMPORTED_CV(gv))))
2626 tmp = 0; /* overridden by importation */
2629 && -tmp==KEY_lock /* XXX generalizable kludge */
2630 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2632 tmp = 0; /* any sub overrides "weak" keyword */
2635 tmp = -tmp; gv = Nullgv; gvp = 0;
2642 default: /* not a keyword */
2645 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2647 /* Get the rest if it looks like a package qualifier */
2649 if (*s == '\'' || *s == ':' && s[1] == ':') {
2650 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2653 croak("Bad name after %s::", tokenbuf);
2656 if (expect == XOPERATOR) {
2657 if (bufptr == linestart) {
2663 no_op("Bareword",s);
2666 /* Look for a subroutine with this name in current package. */
2669 sv = newSVpv("CORE::GLOBAL::",14);
2670 sv_catpv(sv,tokenbuf);
2673 sv = newSVpv(tokenbuf,0);
2675 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2677 /* Presume this is going to be a bareword of some sort. */
2680 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2681 yylval.opval->op_private = OPpCONST_BARE;
2683 /* See if it's the indirect object for a list operator. */
2686 oldoldbufptr < bufptr &&
2687 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2688 /* NO SKIPSPACE BEFORE HERE! */
2690 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2692 bool immediate_paren = *s == '(';
2694 /* (Now we can afford to cross potential line boundary.) */
2697 /* Two barewords in a row may indicate method call. */
2699 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2702 /* If not a declared subroutine, it's an indirect object. */
2703 /* (But it's an indir obj regardless for sort.) */
2705 if ((last_lop_op == OP_SORT ||
2706 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2707 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2708 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2713 /* If followed by a paren, it's certainly a subroutine. */
2719 if (gv && GvCVu(gv)) {
2720 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2721 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2726 nextval[nexttoke].opval = yylval.opval;
2733 /* If followed by var or block, call it a method (unless sub) */
2735 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2736 last_lop = oldbufptr;
2737 last_lop_op = OP_METHOD;
2741 /* If followed by a bareword, see if it looks like indir obj. */
2743 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2746 /* Not a method, so call it a subroutine (if defined) */
2748 if (gv && GvCVu(gv)) {
2750 if (lastchar == '-')
2751 warn("Ambiguous use of -%s resolved as -&%s()",
2752 tokenbuf, tokenbuf);
2753 last_lop = oldbufptr;
2754 last_lop_op = OP_ENTERSUB;
2755 /* Check for a constant sub */
2757 if ((sv = cv_const_sv(cv))) {
2759 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2760 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2761 yylval.opval->op_private = 0;
2765 /* Resolve to GV now. */
2766 op_free(yylval.opval);
2767 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2768 /* Is there a prototype? */
2771 char *proto = SvPV((SV*)cv, len);
2774 if (strEQ(proto, "$"))
2776 if (*proto == '&' && *s == '{') {
2777 sv_setpv(subname,"__ANON__");
2781 nextval[nexttoke].opval = yylval.opval;
2787 if (hints & HINT_STRICT_SUBS &&
2790 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2791 last_lop_op != OP_ACCEPT &&
2792 last_lop_op != OP_PIPE_OP &&
2793 last_lop_op != OP_SOCKPAIR)
2796 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2801 /* Call it a bare word */
2805 if (lastchar != '-') {
2806 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2808 warn(warn_reserved, tokenbuf);
2811 if (lastchar && strchr("*%&", lastchar)) {
2812 warn("Operator or semicolon missing before %c%s",
2813 lastchar, tokenbuf);
2814 warn("Ambiguous use of %c resolved as operator %c",
2815 lastchar, lastchar);
2821 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2822 newSVsv(GvSV(curcop->cop_filegv)));
2826 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2827 newSVpvf("%ld", (long)curcop->cop_line));
2830 case KEY___PACKAGE__:
2831 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2833 ? newSVsv(curstname)
2842 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2843 char *pname = "main";
2844 if (tokenbuf[2] == 'D')
2845 pname = HvNAME(curstash ? curstash : defstash);
2846 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2849 GvIOp(gv) = newIO();
2850 IoIFP(GvIOp(gv)) = rsfp;
2851 #if defined(HAS_FCNTL) && defined(F_SETFD)
2853 int fd = PerlIO_fileno(rsfp);
2854 fcntl(fd,F_SETFD,fd >= 3);
2857 /* Mark this internal pseudo-handle as clean */
2858 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2860 IoTYPE(GvIOp(gv)) = '|';
2861 else if ((PerlIO*)rsfp == PerlIO_stdin())
2862 IoTYPE(GvIOp(gv)) = '-';
2864 IoTYPE(GvIOp(gv)) = '<';
2875 if (expect == XSTATE) {
2882 if (*s == ':' && s[1] == ':') {
2885 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2886 tmp = keyword(tokenbuf, len);
2900 LOP(OP_ACCEPT,XTERM);
2906 LOP(OP_ATAN2,XTERM);
2915 LOP(OP_BLESS,XTERM);
2924 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2944 LOP(OP_CRYPT,XTERM);
2948 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2949 if (*d != '0' && isDIGIT(*d))
2950 yywarn("chmod: mode argument is missing initial 0");
2952 LOP(OP_CHMOD,XTERM);
2955 LOP(OP_CHOWN,XTERM);
2958 LOP(OP_CONNECT,XTERM);
2974 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2978 hints |= HINT_BLOCK_SCOPE;
2988 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2989 LOP(OP_DBMOPEN,XTERM);
2995 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3002 yylval.ival = curcop->cop_line;
3016 expect = (*s == '{') ? XTERMBLOCK : XTERM;
3017 UNIBRACK(OP_ENTEREVAL);
3032 case KEY_endhostent:
3038 case KEY_endservent:
3041 case KEY_endprotoent:
3052 yylval.ival = curcop->cop_line;
3054 if (isIDFIRST(*s)) {
3056 if ((bufend - p) >= 3 &&
3057 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3061 croak("Missing $ on loop variable");
3066 LOP(OP_FORMLINE,XTERM);
3072 LOP(OP_FCNTL,XTERM);
3078 LOP(OP_FLOCK,XTERM);
3087 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3090 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3105 case KEY_getpriority:
3106 LOP(OP_GETPRIORITY,XTERM);
3108 case KEY_getprotobyname:
3111 case KEY_getprotobynumber:
3112 LOP(OP_GPBYNUMBER,XTERM);
3114 case KEY_getprotoent:
3126 case KEY_getpeername:
3127 UNI(OP_GETPEERNAME);
3129 case KEY_gethostbyname:
3132 case KEY_gethostbyaddr:
3133 LOP(OP_GHBYADDR,XTERM);
3135 case KEY_gethostent:
3138 case KEY_getnetbyname:
3141 case KEY_getnetbyaddr:
3142 LOP(OP_GNBYADDR,XTERM);
3147 case KEY_getservbyname:
3148 LOP(OP_GSBYNAME,XTERM);
3150 case KEY_getservbyport:
3151 LOP(OP_GSBYPORT,XTERM);
3153 case KEY_getservent:
3156 case KEY_getsockname:
3157 UNI(OP_GETSOCKNAME);
3159 case KEY_getsockopt:
3160 LOP(OP_GSOCKOPT,XTERM);
3182 yylval.ival = curcop->cop_line;
3186 LOP(OP_INDEX,XTERM);
3192 LOP(OP_IOCTL,XTERM);
3204 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3235 LOP(OP_LISTEN,XTERM);
3245 TERM(sublex_start());
3248 LOP(OP_MAPSTART,XREF);
3251 LOP(OP_MKDIR,XTERM);
3254 LOP(OP_MSGCTL,XTERM);
3257 LOP(OP_MSGGET,XTERM);
3260 LOP(OP_MSGRCV,XTERM);
3263 LOP(OP_MSGSND,XTERM);
3268 if (isIDFIRST(*s)) {
3269 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3270 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3274 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3281 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3288 if (expect != XSTATE)
3289 yyerror("\"no\" not allowed in expression");
3290 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3291 s = force_version(s);
3300 if (isIDFIRST(*s)) {
3302 for (d = s; isALNUM(*d); d++) ;
3304 if (strchr("|&*+-=!?:.", *t))
3305 warn("Precedence problem: open %.*s should be open(%.*s)",
3311 yylval.ival = OP_OR;
3321 LOP(OP_OPEN_DIR,XTERM);
3324 checkcomma(s,tokenbuf,"filehandle");
3328 checkcomma(s,tokenbuf,"filehandle");
3347 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3351 LOP(OP_PIPE_OP,XTERM);
3356 missingterm((char*)0);
3357 yylval.ival = OP_CONST;
3358 TERM(sublex_start());
3366 missingterm((char*)0);
3367 if (dowarn && SvLEN(lex_stuff)) {
3368 d = SvPV_force(lex_stuff, len);
3369 for (; len; --len, ++d) {
3371 warn("Possible attempt to separate words with commas");
3375 warn("Possible attempt to put comments in qw() list");
3381 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3385 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3388 yylval.ival = OP_SPLIT;
3392 last_lop = oldbufptr;
3393 last_lop_op = OP_SPLIT;
3399 missingterm((char*)0);
3400 yylval.ival = OP_STRINGIFY;
3401 if (SvIVX(lex_stuff) == '\'')
3402 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3403 TERM(sublex_start());
3408 missingterm((char*)0);
3409 yylval.ival = OP_BACKTICK;
3411 TERM(sublex_start());
3418 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3419 if (isIDFIRST(*tokenbuf))
3420 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3422 yyerror("<> should be quotes");
3429 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3433 LOP(OP_RENAME,XTERM);
3442 LOP(OP_RINDEX,XTERM);
3465 LOP(OP_REVERSE,XTERM);
3476 TERM(sublex_start());
3478 TOKEN(1); /* force error */
3487 LOP(OP_SELECT,XTERM);
3493 LOP(OP_SEMCTL,XTERM);
3496 LOP(OP_SEMGET,XTERM);
3499 LOP(OP_SEMOP,XTERM);
3505 LOP(OP_SETPGRP,XTERM);
3507 case KEY_setpriority:
3508 LOP(OP_SETPRIORITY,XTERM);
3510 case KEY_sethostent:
3516 case KEY_setservent:
3519 case KEY_setprotoent:
3529 LOP(OP_SEEKDIR,XTERM);
3531 case KEY_setsockopt:
3532 LOP(OP_SSOCKOPT,XTERM);
3538 LOP(OP_SHMCTL,XTERM);
3541 LOP(OP_SHMGET,XTERM);
3544 LOP(OP_SHMREAD,XTERM);
3547 LOP(OP_SHMWRITE,XTERM);
3550 LOP(OP_SHUTDOWN,XTERM);
3559 LOP(OP_SOCKET,XTERM);
3561 case KEY_socketpair:
3562 LOP(OP_SOCKPAIR,XTERM);
3565 checkcomma(s,tokenbuf,"subroutine name");
3567 if (*s == ';' || *s == ')') /* probably a close */
3568 croak("sort is now a reserved word");
3570 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3574 LOP(OP_SPLIT,XTERM);
3577 LOP(OP_SPRINTF,XTERM);
3580 LOP(OP_SPLICE,XTERM);
3596 LOP(OP_SUBSTR,XTERM);
3603 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3604 char tmpbuf[sizeof tokenbuf];
3606 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3607 if (strchr(tmpbuf, ':'))
3608 sv_setpv(subname, tmpbuf);
3610 sv_setsv(subname,curstname);
3611 sv_catpvn(subname,"::",2);
3612 sv_catpvn(subname,tmpbuf,len);
3614 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3618 expect = XTERMBLOCK;
3619 sv_setpv(subname,"?");
3622 if (tmp == KEY_format) {
3625 lex_formbrack = lex_brackets + 1;
3629 /* Look for a prototype */
3636 SvREFCNT_dec(lex_stuff);
3638 croak("Prototype not terminated");
3641 d = SvPVX(lex_stuff);
3643 for (p = d; *p; ++p) {
3648 SvCUR(lex_stuff) = tmp;
3651 nextval[1] = nextval[0];
3652 nexttype[1] = nexttype[0];
3653 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3654 nexttype[0] = THING;
3655 if (nexttoke == 1) {
3656 lex_defer = lex_state;
3657 lex_expect = expect;
3658 lex_state = LEX_KNOWNEXT;
3663 if (*SvPV(subname,na) == '?') {
3664 sv_setpv(subname,"__ANON__");
3671 LOP(OP_SYSTEM,XREF);
3674 LOP(OP_SYMLINK,XTERM);
3677 LOP(OP_SYSCALL,XTERM);
3680 LOP(OP_SYSOPEN,XTERM);
3683 LOP(OP_SYSSEEK,XTERM);
3686 LOP(OP_SYSREAD,XTERM);
3689 LOP(OP_SYSWRITE,XTERM);
3693 TERM(sublex_start());
3714 LOP(OP_TRUNCATE,XTERM);
3726 yylval.ival = curcop->cop_line;
3730 yylval.ival = curcop->cop_line;
3734 LOP(OP_UNLINK,XTERM);
3740 LOP(OP_UNPACK,XTERM);
3743 LOP(OP_UTIME,XTERM);
3747 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3748 if (*d != '0' && isDIGIT(*d))
3749 yywarn("umask: argument is missing initial 0");
3754 LOP(OP_UNSHIFT,XTERM);
3757 if (expect != XSTATE)
3758 yyerror("\"use\" not allowed in expression");
3761 s = force_version(s);
3762 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3763 nextval[nexttoke].opval = Nullop;
3768 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3769 s = force_version(s);
3782 yylval.ival = curcop->cop_line;
3786 hints |= HINT_BLOCK_SCOPE;
3793 LOP(OP_WAITPID,XTERM);
3799 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3803 if (expect == XOPERATOR)
3809 yylval.ival = OP_XOR;
3814 TERM(sublex_start());
3820 keyword(register char *d, I32 len)
3825 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3826 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3827 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3828 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3829 if (strEQ(d,"__END__")) return KEY___END__;
3833 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3838 if (strEQ(d,"and")) return -KEY_and;
3839 if (strEQ(d,"abs")) return -KEY_abs;
3842 if (strEQ(d,"alarm")) return -KEY_alarm;
3843 if (strEQ(d,"atan2")) return -KEY_atan2;
3846 if (strEQ(d,"accept")) return -KEY_accept;
3851 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3854 if (strEQ(d,"bless")) return -KEY_bless;
3855 if (strEQ(d,"bind")) return -KEY_bind;
3856 if (strEQ(d,"binmode")) return -KEY_binmode;
3859 if (strEQ(d,"CORE")) return -KEY_CORE;
3864 if (strEQ(d,"cmp")) return -KEY_cmp;
3865 if (strEQ(d,"chr")) return -KEY_chr;
3866 if (strEQ(d,"cos")) return -KEY_cos;
3869 if (strEQ(d,"chop")) return KEY_chop;
3872 if (strEQ(d,"close")) return -KEY_close;
3873 if (strEQ(d,"chdir")) return -KEY_chdir;
3874 if (strEQ(d,"chomp")) return KEY_chomp;
3875 if (strEQ(d,"chmod")) return -KEY_chmod;
3876 if (strEQ(d,"chown")) return -KEY_chown;
3877 if (strEQ(d,"crypt")) return -KEY_crypt;
3880 if (strEQ(d,"chroot")) return -KEY_chroot;
3881 if (strEQ(d,"caller")) return -KEY_caller;
3884 if (strEQ(d,"connect")) return -KEY_connect;
3887 if (strEQ(d,"closedir")) return -KEY_closedir;
3888 if (strEQ(d,"continue")) return -KEY_continue;
3893 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3898 if (strEQ(d,"do")) return KEY_do;
3901 if (strEQ(d,"die")) return -KEY_die;
3904 if (strEQ(d,"dump")) return -KEY_dump;
3907 if (strEQ(d,"delete")) return KEY_delete;
3910 if (strEQ(d,"defined")) return KEY_defined;
3911 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3914 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3919 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3920 if (strEQ(d,"END")) return KEY_END;
3925 if (strEQ(d,"eq")) return -KEY_eq;
3928 if (strEQ(d,"eof")) return -KEY_eof;
3929 if (strEQ(d,"exp")) return -KEY_exp;
3932 if (strEQ(d,"else")) return KEY_else;
3933 if (strEQ(d,"exit")) return -KEY_exit;
3934 if (strEQ(d,"eval")) return KEY_eval;
3935 if (strEQ(d,"exec")) return -KEY_exec;
3936 if (strEQ(d,"each")) return KEY_each;
3939 if (strEQ(d,"elsif")) return KEY_elsif;
3942 if (strEQ(d,"exists")) return KEY_exists;
3943 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3946 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3947 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3950 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3953 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3954 if (strEQ(d,"endservent")) return -KEY_endservent;
3957 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3964 if (strEQ(d,"for")) return KEY_for;
3967 if (strEQ(d,"fork")) return -KEY_fork;
3970 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3971 if (strEQ(d,"flock")) return -KEY_flock;
3974 if (strEQ(d,"format")) return KEY_format;
3975 if (strEQ(d,"fileno")) return -KEY_fileno;
3978 if (strEQ(d,"foreach")) return KEY_foreach;
3981 if (strEQ(d,"formline")) return -KEY_formline;
3987 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3988 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
3992 if (strnEQ(d,"get",3)) {
3997 if (strEQ(d,"ppid")) return -KEY_getppid;
3998 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4001 if (strEQ(d,"pwent")) return -KEY_getpwent;
4002 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4003 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4006 if (strEQ(d,"peername")) return -KEY_getpeername;
4007 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4008 if (strEQ(d,"priority")) return -KEY_getpriority;
4011 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4014 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4018 else if (*d == 'h') {
4019 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4020 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4021 if (strEQ(d,"hostent")) return -KEY_gethostent;
4023 else if (*d == 'n') {
4024 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4025 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4026 if (strEQ(d,"netent")) return -KEY_getnetent;
4028 else if (*d == 's') {
4029 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4030 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4031 if (strEQ(d,"servent")) return -KEY_getservent;
4032 if (strEQ(d,"sockname")) return -KEY_getsockname;
4033 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4035 else if (*d == 'g') {
4036 if (strEQ(d,"grent")) return -KEY_getgrent;
4037 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4038 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4040 else if (*d == 'l') {
4041 if (strEQ(d,"login")) return -KEY_getlogin;
4043 else if (strEQ(d,"c")) return -KEY_getc;
4048 if (strEQ(d,"gt")) return -KEY_gt;
4049 if (strEQ(d,"ge")) return -KEY_ge;
4052 if (strEQ(d,"grep")) return KEY_grep;
4053 if (strEQ(d,"goto")) return KEY_goto;
4054 if (strEQ(d,"glob")) return KEY_glob;
4057 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4062 if (strEQ(d,"hex")) return -KEY_hex;
4065 if (strEQ(d,"INIT")) return KEY_INIT;
4070 if (strEQ(d,"if")) return KEY_if;
4073 if (strEQ(d,"int")) return -KEY_int;
4076 if (strEQ(d,"index")) return -KEY_index;
4077 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4082 if (strEQ(d,"join")) return -KEY_join;
4086 if (strEQ(d,"keys")) return KEY_keys;
4087 if (strEQ(d,"kill")) return -KEY_kill;
4092 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4093 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4099 if (strEQ(d,"lt")) return -KEY_lt;
4100 if (strEQ(d,"le")) return -KEY_le;
4101 if (strEQ(d,"lc")) return -KEY_lc;
4104 if (strEQ(d,"log")) return -KEY_log;
4107 if (strEQ(d,"last")) return KEY_last;
4108 if (strEQ(d,"link")) return -KEY_link;
4109 if (strEQ(d,"lock")) return -KEY_lock;
4112 if (strEQ(d,"local")) return KEY_local;
4113 if (strEQ(d,"lstat")) return -KEY_lstat;
4116 if (strEQ(d,"length")) return -KEY_length;
4117 if (strEQ(d,"listen")) return -KEY_listen;
4120 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4123 if (strEQ(d,"localtime")) return -KEY_localtime;
4129 case 1: return KEY_m;
4131 if (strEQ(d,"my")) return KEY_my;
4134 if (strEQ(d,"map")) return KEY_map;
4137 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4140 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4141 if (strEQ(d,"msgget")) return -KEY_msgget;
4142 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4143 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4148 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4151 if (strEQ(d,"next")) return KEY_next;
4152 if (strEQ(d,"ne")) return -KEY_ne;
4153 if (strEQ(d,"not")) return -KEY_not;
4154 if (strEQ(d,"no")) return KEY_no;
4159 if (strEQ(d,"or")) return -KEY_or;
4162 if (strEQ(d,"ord")) return -KEY_ord;
4163 if (strEQ(d,"oct")) return -KEY_oct;
4166 if (strEQ(d,"open")) return -KEY_open;
4169 if (strEQ(d,"opendir")) return -KEY_opendir;
4176 if (strEQ(d,"pop")) return KEY_pop;
4177 if (strEQ(d,"pos")) return KEY_pos;
4180 if (strEQ(d,"push")) return KEY_push;
4181 if (strEQ(d,"pack")) return -KEY_pack;
4182 if (strEQ(d,"pipe")) return -KEY_pipe;
4185 if (strEQ(d,"print")) return KEY_print;
4188 if (strEQ(d,"printf")) return KEY_printf;
4191 if (strEQ(d,"package")) return KEY_package;
4194 if (strEQ(d,"prototype")) return KEY_prototype;
4199 if (strEQ(d,"q")) return KEY_q;
4200 if (strEQ(d,"qq")) return KEY_qq;
4201 if (strEQ(d,"qw")) return KEY_qw;
4202 if (strEQ(d,"qx")) return KEY_qx;
4204 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4209 if (strEQ(d,"ref")) return -KEY_ref;
4212 if (strEQ(d,"read")) return -KEY_read;
4213 if (strEQ(d,"rand")) return -KEY_rand;
4214 if (strEQ(d,"recv")) return -KEY_recv;
4215 if (strEQ(d,"redo")) return KEY_redo;
4218 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4219 if (strEQ(d,"reset")) return -KEY_reset;
4222 if (strEQ(d,"return")) return KEY_return;
4223 if (strEQ(d,"rename")) return -KEY_rename;
4224 if (strEQ(d,"rindex")) return -KEY_rindex;
4227 if (strEQ(d,"require")) return -KEY_require;
4228 if (strEQ(d,"reverse")) return -KEY_reverse;
4229 if (strEQ(d,"readdir")) return -KEY_readdir;
4232 if (strEQ(d,"readlink")) return -KEY_readlink;
4233 if (strEQ(d,"readline")) return -KEY_readline;
4234 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4237 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4243 case 0: return KEY_s;
4245 if (strEQ(d,"scalar")) return KEY_scalar;
4250 if (strEQ(d,"seek")) return -KEY_seek;
4251 if (strEQ(d,"send")) return -KEY_send;
4254 if (strEQ(d,"semop")) return -KEY_semop;
4257 if (strEQ(d,"select")) return -KEY_select;
4258 if (strEQ(d,"semctl")) return -KEY_semctl;
4259 if (strEQ(d,"semget")) return -KEY_semget;
4262 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4263 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4266 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4267 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4270 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4273 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4274 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4275 if (strEQ(d,"setservent")) return -KEY_setservent;
4278 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4279 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4286 if (strEQ(d,"shift")) return KEY_shift;
4289 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4290 if (strEQ(d,"shmget")) return -KEY_shmget;
4293 if (strEQ(d,"shmread")) return -KEY_shmread;
4296 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4297 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4302 if (strEQ(d,"sin")) return -KEY_sin;
4305 if (strEQ(d,"sleep")) return -KEY_sleep;
4308 if (strEQ(d,"sort")) return KEY_sort;
4309 if (strEQ(d,"socket")) return -KEY_socket;
4310 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4313 if (strEQ(d,"split")) return KEY_split;
4314 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4315 if (strEQ(d,"splice")) return KEY_splice;
4318 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4321 if (strEQ(d,"srand")) return -KEY_srand;
4324 if (strEQ(d,"stat")) return -KEY_stat;
4325 if (strEQ(d,"study")) return KEY_study;
4328 if (strEQ(d,"substr")) return -KEY_substr;
4329 if (strEQ(d,"sub")) return KEY_sub;
4334 if (strEQ(d,"system")) return -KEY_system;
4337 if (strEQ(d,"symlink")) return -KEY_symlink;
4338 if (strEQ(d,"syscall")) return -KEY_syscall;
4339 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4340 if (strEQ(d,"sysread")) return -KEY_sysread;
4341 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4344 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4353 if (strEQ(d,"tr")) return KEY_tr;
4356 if (strEQ(d,"tie")) return KEY_tie;
4359 if (strEQ(d,"tell")) return -KEY_tell;
4360 if (strEQ(d,"tied")) return KEY_tied;
4361 if (strEQ(d,"time")) return -KEY_time;
4364 if (strEQ(d,"times")) return -KEY_times;
4367 if (strEQ(d,"telldir")) return -KEY_telldir;
4370 if (strEQ(d,"truncate")) return -KEY_truncate;
4377 if (strEQ(d,"uc")) return -KEY_uc;
4380 if (strEQ(d,"use")) return KEY_use;
4383 if (strEQ(d,"undef")) return KEY_undef;
4384 if (strEQ(d,"until")) return KEY_until;
4385 if (strEQ(d,"untie")) return KEY_untie;
4386 if (strEQ(d,"utime")) return -KEY_utime;
4387 if (strEQ(d,"umask")) return -KEY_umask;
4390 if (strEQ(d,"unless")) return KEY_unless;
4391 if (strEQ(d,"unpack")) return -KEY_unpack;
4392 if (strEQ(d,"unlink")) return -KEY_unlink;
4395 if (strEQ(d,"unshift")) return KEY_unshift;
4396 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4401 if (strEQ(d,"values")) return -KEY_values;
4402 if (strEQ(d,"vec")) return -KEY_vec;
4407 if (strEQ(d,"warn")) return -KEY_warn;
4408 if (strEQ(d,"wait")) return -KEY_wait;
4411 if (strEQ(d,"while")) return KEY_while;
4412 if (strEQ(d,"write")) return -KEY_write;
4415 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4418 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4423 if (len == 1) return -KEY_x;
4424 if (strEQ(d,"xor")) return -KEY_xor;
4427 if (len == 1) return KEY_y;
4436 checkcomma(register char *s, char *name, char *what)
4440 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4442 for (w = s+2; *w && level; w++) {
4449 for (; *w && isSPACE(*w); w++) ;
4450 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4451 warn("%s (...) interpreted as function",name);
4453 while (s < bufend && isSPACE(*s))
4457 while (s < bufend && isSPACE(*s))
4459 if (isIDFIRST(*s)) {
4463 while (s < bufend && isSPACE(*s))
4468 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4472 croak("No comma allowed after %s", what);
4478 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4480 register char *d = dest;
4481 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4484 croak(ident_too_long);
4487 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4492 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4505 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4512 if (lex_brackets == 0)
4517 e = d + destlen - 3; /* two-character token, ending NUL */
4519 while (isDIGIT(*s)) {
4521 croak(ident_too_long);
4528 croak(ident_too_long);
4531 else if (*s == '\'' && isIDFIRST(s[1])) {
4536 else if (*s == ':' && s[1] == ':') {
4547 if (lex_state != LEX_NORMAL)
4548 lex_state = LEX_INTERPENDMAYBE;
4551 if (*s == '$' && s[1] &&
4552 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4554 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4555 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4568 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4573 if (isSPACE(s[-1])) {
4576 if (ch != ' ' && ch != '\t') {
4582 if (isIDFIRST(*d)) {
4584 while (isALNUM(*s) || *s == ':')
4587 while (s < send && (*s == ' ' || *s == '\t')) s++;
4588 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4589 if (dowarn && keyword(dest, d - dest)) {
4590 char *brack = *s == '[' ? "[...]" : "{...}";
4591 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4592 funny, dest, brack, funny, dest, brack);
4594 lex_fakebrack = lex_brackets+1;
4596 lex_brackstack[lex_brackets++] = XOPERATOR;
4602 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4603 lex_state = LEX_INTERPEND;
4606 if (dowarn && lex_state == LEX_NORMAL &&
4607 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4608 warn("Ambiguous use of %c{%s} resolved to %c%s",
4609 funny, dest, funny, dest);
4612 s = bracket; /* let the parser handle it */
4616 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4617 lex_state = LEX_INTERPEND;
4621 void pmflag(U16 *pmfl, int ch)
4626 *pmfl |= PMf_GLOBAL;
4628 *pmfl |= PMf_CONTINUE;
4632 *pmfl |= PMf_MULTILINE;
4634 *pmfl |= PMf_SINGLELINE;
4636 *pmfl |= PMf_EXTENDED;
4640 scan_pat(char *start)
4645 s = scan_str(start);
4648 SvREFCNT_dec(lex_stuff);
4650 croak("Search pattern not terminated");
4653 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4654 if (multi_open == '?')
4655 pm->op_pmflags |= PMf_ONCE;
4656 while (*s && strchr("iogcmsx", *s))
4657 pmflag(&pm->op_pmflags,*s++);
4658 pm->op_pmpermflags = pm->op_pmflags;
4661 yylval.ival = OP_MATCH;
4666 scan_subst(char *start)
4673 yylval.ival = OP_NULL;
4675 s = scan_str(start);
4679 SvREFCNT_dec(lex_stuff);
4681 croak("Substitution pattern not terminated");
4684 if (s[-1] == multi_open)
4687 first_start = multi_start;
4691 SvREFCNT_dec(lex_stuff);
4694 SvREFCNT_dec(lex_repl);
4696 croak("Substitution replacement not terminated");
4698 multi_start = first_start; /* so whole substitution is taken together */
4700 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4701 while (*s && strchr("iogcmsex", *s)) {
4707 pmflag(&pm->op_pmflags,*s++);
4712 pm->op_pmflags |= PMf_EVAL;
4713 repl = newSVpv("",0);
4715 sv_catpv(repl, es ? "eval " : "do ");
4716 sv_catpvn(repl, "{ ", 2);
4717 sv_catsv(repl, lex_repl);
4718 sv_catpvn(repl, " };", 2);
4719 SvCOMPILED_on(repl);
4720 SvREFCNT_dec(lex_repl);
4724 pm->op_pmpermflags = pm->op_pmflags;
4726 yylval.ival = OP_SUBST;
4731 scan_trans(char *start)
4740 yylval.ival = OP_NULL;
4742 s = scan_str(start);
4745 SvREFCNT_dec(lex_stuff);
4747 croak("Translation pattern not terminated");
4749 if (s[-1] == multi_open)
4755 SvREFCNT_dec(lex_stuff);
4758 SvREFCNT_dec(lex_repl);
4760 croak("Translation replacement not terminated");
4763 New(803,tbl,256,short);
4764 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4766 complement = Delete = squash = 0;
4767 while (*s == 'c' || *s == 'd' || *s == 's') {
4769 complement = OPpTRANS_COMPLEMENT;
4771 Delete = OPpTRANS_DELETE;
4773 squash = OPpTRANS_SQUASH;
4776 o->op_private = Delete|squash|complement;
4779 yylval.ival = OP_TRANS;
4784 scan_heredoc(register char *s)
4788 I32 op_type = OP_SCALAR;
4795 int outer = (rsfp && !lex_inwhat);
4799 e = tokenbuf + sizeof tokenbuf - 1;
4802 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4803 if (*peek && strchr("`'\"",*peek)) {
4806 s = delimcpy(d, e, s, bufend, term, &len);
4817 deprecate("bare << to mean <<\"\"");
4818 for (; isALNUM(*s); s++) {
4823 if (d >= tokenbuf + sizeof tokenbuf - 1)
4824 croak("Delimiter for here document is too long");
4829 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4830 herewas = newSVpv(s,bufend-s);
4832 s--, herewas = newSVpv(s,d-s);
4833 s += SvCUR(herewas);
4835 tmpstr = NEWSV(87,80);
4836 sv_upgrade(tmpstr, SVt_PVIV);
4841 else if (term == '`') {
4842 op_type = OP_BACKTICK;
4843 SvIVX(tmpstr) = '\\';
4847 multi_start = curcop->cop_line;
4848 multi_open = multi_close = '<';
4852 while (s < bufend &&
4853 (*s != term || memNE(s,tokenbuf,len)) ) {
4858 curcop->cop_line = multi_start;
4859 missingterm(tokenbuf);
4861 sv_setpvn(tmpstr,d+1,s-d);
4863 curcop->cop_line++; /* the preceding stmt passes a newline */
4865 sv_catpvn(herewas,s,bufend-s);
4866 sv_setsv(linestr,herewas);
4867 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4868 bufend = SvPVX(linestr) + SvCUR(linestr);
4871 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4872 while (s >= bufend) { /* multiple line string? */
4874 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4875 curcop->cop_line = multi_start;
4876 missingterm(tokenbuf);
4879 if (PERLDB_LINE && curstash != debstash) {
4880 SV *sv = NEWSV(88,0);
4882 sv_upgrade(sv, SVt_PVMG);
4883 sv_setsv(sv,linestr);
4884 av_store(GvAV(curcop->cop_filegv),
4885 (I32)curcop->cop_line,sv);
4887 bufend = SvPVX(linestr) + SvCUR(linestr);
4888 if (*s == term && memEQ(s,tokenbuf,len)) {
4891 sv_catsv(linestr,herewas);
4892 bufend = SvPVX(linestr) + SvCUR(linestr);
4896 sv_catsv(tmpstr,linestr);
4899 multi_end = curcop->cop_line;
4901 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4902 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4903 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4905 SvREFCNT_dec(herewas);
4907 yylval.ival = op_type;
4912 scan_inputsymbol(char *start)
4914 register char *s = start;
4920 e = tokenbuf + sizeof tokenbuf;
4921 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4922 if (len >= sizeof tokenbuf)
4923 croak("Excessively long <> operator");
4925 croak("Unterminated <> operator");
4927 if (*d == '$' && d[1]) d++;
4928 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4930 if (d - tokenbuf != len) {
4931 yylval.ival = OP_GLOB;
4933 s = scan_str(start);
4935 croak("Glob not terminated");
4941 (void)strcpy(d,"ARGV");
4944 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4945 OP *o = newOP(OP_PADSV, 0);
4947 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4950 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4951 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4952 newUNOP(OP_RV2GV, 0,
4953 newUNOP(OP_RV2SV, 0,
4954 newGVOP(OP_GV, 0, gv))));
4956 yylval.ival = OP_NULL;
4959 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4960 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4961 yylval.ival = OP_NULL;
4968 scan_str(char *start)
4973 register char *s = start;
4982 multi_start = curcop->cop_line;
4984 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4989 sv_upgrade(sv, SVt_PVIV);
4991 (void)SvPOK_only(sv); /* validate pointer */
4994 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
4995 to = SvPVX(sv)+SvCUR(sv);
4996 if (multi_open == multi_close) {
4997 for (; s < bufend; s++,to++) {
4998 if (*s == '\n' && !rsfp)
5000 if (*s == '\\' && s+1 < bufend && term != '\\') {
5006 else if (*s == term)
5012 for (; s < bufend; s++,to++) {
5013 if (*s == '\n' && !rsfp)
5015 if (*s == '\\' && s+1 < bufend) {
5016 if ((s[1] == multi_open) || (s[1] == multi_close))
5021 else if (*s == multi_close && --brackets <= 0)
5023 else if (*s == multi_open)
5029 SvCUR_set(sv, to - SvPVX(sv));
5031 if (s < bufend) break; /* string ends on this line? */
5034 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5036 curcop->cop_line = multi_start;
5040 if (PERLDB_LINE && curstash != debstash) {
5041 SV *sv = NEWSV(88,0);
5043 sv_upgrade(sv, SVt_PVMG);
5044 sv_setsv(sv,linestr);
5045 av_store(GvAV(curcop->cop_filegv),
5046 (I32)curcop->cop_line, sv);
5048 bufend = SvPVX(linestr) + SvCUR(linestr);
5050 multi_end = curcop->cop_line;
5052 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5053 SvLEN_set(sv, SvCUR(sv) + 1);
5054 Renew(SvPVX(sv), SvLEN(sv), char);
5064 scan_num(char *start)
5066 register char *s = start;
5074 static char number_too_long[] = "Number too long";
5078 croak("panic: scan_num");
5083 bool overflowed = FALSE;
5089 else if (s[1] == '.')
5105 yyerror("Illegal octal digit");
5107 case '0': case '1': case '2': case '3': case '4':
5108 case '5': case '6': case '7':
5111 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5112 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5118 if (!overflowed && (n >> shift) != u) {
5119 warn("Integer overflow in %s number",
5120 (shift == 4) ? "hex" : "octal");
5132 case '1': case '2': case '3': case '4': case '5':
5133 case '6': case '7': case '8': case '9': case '.':
5136 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5138 while (isDIGIT(*s) || *s == '_') {
5140 if (dowarn && lastub && s - lastub != 3)
5141 warn("Misplaced _ in number");
5146 croak(number_too_long);
5150 if (dowarn && lastub && s - lastub != 3)
5151 warn("Misplaced _ in number");
5152 if (*s == '.' && s[1] != '.') {
5155 for (; isDIGIT(*s) || *s == '_'; s++) {
5157 croak(number_too_long);
5162 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5165 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5166 if (*s == '+' || *s == '-')
5168 while (isDIGIT(*s)) {
5170 croak(number_too_long);
5176 SET_NUMERIC_STANDARD();
5177 value = atof(tokenbuf);
5179 if (!floatit && (double)tryiv == value)
5180 sv_setiv(sv, tryiv);
5182 sv_setnv(sv, value);
5186 yylval.opval = newSVOP(OP_CONST, 0, sv);
5192 scan_formline(register char *s)
5197 SV *stuff = newSVpv("",0);
5198 bool needargs = FALSE;
5201 if (*s == '.' || *s == '}') {
5203 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5207 if (in_eval && !rsfp) {
5208 eol = strchr(s,'\n');
5213 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5215 for (t = s; t < eol; t++) {
5216 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5218 goto enough; /* ~~ must be first line in formline */
5220 if (*t == '@' || *t == '^')
5223 sv_catpvn(stuff, s, eol-s);
5227 s = filter_gets(linestr, rsfp, 0);
5228 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5229 bufend = bufptr + SvCUR(linestr);
5232 yyerror("Format not terminated");
5242 lex_state = LEX_NORMAL;
5243 nextval[nexttoke].ival = 0;
5247 lex_state = LEX_FORMLINE;
5248 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5250 nextval[nexttoke].ival = OP_FORMLINE;
5254 SvREFCNT_dec(stuff);
5266 cshlen = strlen(cshname);
5271 start_subparse(I32 is_format, U32 flags)
5274 I32 oldsavestack_ix = savestack_ix;
5275 CV* outsidecv = compcv;
5279 assert(SvTYPE(compcv) == SVt_PVCV);
5286 SAVESPTR(comppad_name);
5288 SAVEI32(comppad_name_fill);
5289 SAVEI32(min_intro_pending);
5290 SAVEI32(max_intro_pending);
5291 SAVEI32(pad_reset_pending);
5293 compcv = (CV*)NEWSV(1104,0);
5294 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5295 CvFLAGS(compcv) |= flags;
5298 av_push(comppad, Nullsv);
5299 curpad = AvARRAY(comppad);
5300 comppad_name = newAV();
5301 comppad_name_fill = 0;
5302 min_intro_pending = 0;
5304 subline = curcop->cop_line;
5306 av_store(comppad_name, 0, newSVpv("@_", 2));
5307 curpad[0] = (SV*)newAV();
5308 SvPADMY_on(curpad[0]); /* XXX Needed? */
5309 CvOWNER(compcv) = 0;
5310 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5311 MUTEX_INIT(CvMUTEXP(compcv));
5312 #endif /* USE_THREADS */
5314 comppadlist = newAV();
5315 AvREAL_off(comppadlist);
5316 av_store(comppadlist, 0, (SV*)comppad_name);
5317 av_store(comppadlist, 1, (SV*)comppad);
5319 CvPADLIST(compcv) = comppadlist;
5320 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5322 CvOWNER(compcv) = 0;
5323 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5324 MUTEX_INIT(CvMUTEXP(compcv));
5325 #endif /* USE_THREADS */
5327 return oldsavestack_ix;
5346 char *context = NULL;
5350 if (!yychar || (yychar == ';' && !rsfp))
5352 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5353 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5354 while (isSPACE(*oldoldbufptr))
5356 context = oldoldbufptr;
5357 contlen = bufptr - oldoldbufptr;
5359 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5360 oldbufptr != bufptr) {
5361 while (isSPACE(*oldbufptr))
5363 context = oldbufptr;
5364 contlen = bufptr - oldbufptr;
5366 else if (yychar > 255)
5367 where = "next token ???";
5368 else if ((yychar & 127) == 127) {
5369 if (lex_state == LEX_NORMAL ||
5370 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5371 where = "at end of line";
5373 where = "within pattern";
5375 where = "within string";
5378 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5380 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5381 else if (isPRINT_LC(yychar))
5382 sv_catpvf(where_sv, "%c", yychar);
5384 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5385 where = SvPVX(where_sv);
5387 msg = sv_2mortal(newSVpv(s, 0));
5388 sv_catpvf(msg, " at %_ line %ld, ",
5389 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5391 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5393 sv_catpvf(msg, "%s\n", where);
5394 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5396 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5397 (int)multi_open,(int)multi_close,(long)multi_start);
5403 sv_catsv(ERRSV, msg);
5405 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5406 if (++error_count >= 10)
5407 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5409 in_my_stash = Nullhv;