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));
53 static char ident_too_long[] = "Identifier too long";
55 static char *linestart; /* beg. of most recently read line */
57 static char pending_ident; /* pending identifier lookup */
60 I32 super_state; /* lexer state to save */
61 I32 sub_inwhat; /* "lex_inwhat" to use */
62 OP *sub_op; /* "lex_op" to use */
65 /* The following are arranged oddly so that the guard on the switch statement
66 * can get by with a single comparison (if the compiler is smart enough).
69 /* #define LEX_NOTPARSING 11 is done in perl.h. */
72 #define LEX_INTERPNORMAL 9
73 #define LEX_INTERPCASEMOD 8
74 #define LEX_INTERPPUSH 7
75 #define LEX_INTERPSTART 6
76 #define LEX_INTERPEND 5
77 #define LEX_INTERPENDMAYBE 4
78 #define LEX_INTERPCONCAT 3
79 #define LEX_INTERPCONST 2
80 #define LEX_FORMLINE 1
81 #define LEX_KNOWNEXT 0
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
92 # include <unistd.h> /* Needed for execv() */
100 #include "keywords.h"
105 #define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
107 #define TOKEN(retval) return (bufptr = s,(int)retval)
108 #define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
109 #define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
110 #define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
111 #define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
112 #define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
113 #define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
114 #define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
115 #define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
116 #define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
117 #define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
118 #define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
119 #define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
120 #define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
121 #define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
122 #define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
123 #define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
124 #define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
125 #define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
126 #define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
128 /* This bit of chicanery makes a unary function followed by
129 * a parenthesis into a function with one argument, highest precedence.
131 #define UNI(f) return(yylval.ival = f, \
134 last_uni = oldbufptr, \
136 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
138 #define UNIBRACK(f) return(yylval.ival = f, \
140 last_uni = oldbufptr, \
141 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
143 /* grandfather return to old style */
144 #define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
149 if (*bufptr == '=') {
151 if (toketype == ANDAND)
152 yylval.ival = OP_ANDASSIGN;
153 else if (toketype == OROR)
154 yylval.ival = OP_ORASSIGN;
161 no_op(char *what, char *s)
163 char *oldbp = bufptr;
164 bool is_first = (oldbufptr == linestart);
167 yywarn(form("%s found where operator expected", what));
169 warn("\t(Missing semicolon on previous line?)\n");
170 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
172 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
173 if (t < bufptr && isSPACE(*t))
174 warn("\t(Do you need to predeclare %.*s?)\n",
175 t - oldoldbufptr, oldoldbufptr);
179 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
189 char *nl = strrchr(s,'\n');
193 else if (multi_close < 32 || multi_close == 127) {
195 tmpbuf[1] = toCTRL(multi_close);
201 *tmpbuf = multi_close;
205 q = strchr(s,'"') ? '\'' : '"';
206 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
213 warn("Use of %s is deprecated", s);
219 deprecate("comma-less variable list");
230 SAVEI32(lex_brackets);
231 SAVEI32(lex_fakebrack);
232 SAVEI32(lex_casemods);
237 SAVEI16(curcop->cop_line);
241 SAVEPPTR(oldoldbufptr);
244 SAVEPPTR(lex_brackstack);
245 SAVEPPTR(lex_casestack);
246 SAVEDESTRUCTOR(restore_rsfp, rsfp);
248 lex_state = LEX_NORMAL;
253 New(899, lex_brackstack, 120, char);
254 New(899, lex_casestack, 12, char);
255 SAVEFREEPV(lex_brackstack);
256 SAVEFREEPV(lex_casestack);
258 *lex_casestack = '\0';
262 SvREFCNT_dec(lex_stuff);
265 SvREFCNT_dec(lex_repl);
270 if (SvREADONLY(linestr))
271 linestr = sv_2mortal(newSVsv(linestr));
272 s = SvPV(linestr, len);
273 if (len && s[len-1] != ';') {
274 if (!(SvFLAGS(linestr) & SVs_TEMP))
275 linestr = sv_2mortal(newSVsv(linestr));
276 sv_catpvn(linestr, "\n;", 2);
279 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
280 bufend = bufptr + SvCUR(linestr);
282 rs = newSVpv("\n", 1);
293 restore_rsfp(void *f)
295 PerlIO *fp = (PerlIO*)f;
297 if (rsfp == PerlIO_stdin())
298 PerlIO_clearerr(rsfp);
299 else if (rsfp && (rsfp != fp))
316 while (*s == ' ' || *s == '\t') s++;
317 if (strnEQ(s, "line ", 5)) {
326 while (*s == ' ' || *s == '\t')
328 if (*s == '"' && (t = strchr(s+1, '"')))
332 return; /* false alarm */
333 for (t = s; !isSPACE(*t); t++) ;
338 curcop->cop_filegv = gv_fetchfile(s);
340 curcop->cop_filegv = gv_fetchfile(origfilename);
342 curcop->cop_line = atoi(n)-1;
346 skipspace(register char *s)
349 if (lex_formbrack && lex_brackets <= lex_formbrack) {
350 while (s < bufend && (*s == ' ' || *s == '\t'))
356 while (s < bufend && isSPACE(*s))
358 if (s < bufend && *s == '#') {
359 while (s < bufend && *s != '\n')
364 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
366 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
367 if (minus_n || minus_p) {
368 sv_setpv(linestr,minus_p ?
369 ";}continue{print or die qq(-p destination: $!\\n)" :
371 sv_catpv(linestr,";}");
372 minus_n = minus_p = 0;
375 sv_setpv(linestr,";");
376 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
377 bufend = SvPVX(linestr) + SvCUR(linestr);
378 if (preprocess && !in_eval)
379 (void)my_pclose(rsfp);
380 else if ((PerlIO*)rsfp == PerlIO_stdin())
381 PerlIO_clearerr(rsfp);
383 (void)PerlIO_close(rsfp);
389 linestart = bufptr = s + prevlen;
390 bufend = s + SvCUR(linestr);
393 if (PERLDB_LINE && curstash != debstash) {
394 SV *sv = NEWSV(85,0);
396 sv_upgrade(sv, SVt_PVMG);
397 sv_setpvn(sv,bufptr,bufend-bufptr);
398 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
409 if (oldoldbufptr != last_uni)
411 while (isSPACE(*last_uni))
413 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
414 if ((t = strchr(s, '(')) && t < bufptr)
418 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
425 #define UNI(f) return uni(f,s)
433 last_uni = oldbufptr;
444 #endif /* CRIPPLED_CC */
446 #define LOP(f,x) return lop(f,x,s)
451 (I32 f, expectation x, char *s)
457 #endif /* CAN_PROTOTYPE */
464 last_lop = oldbufptr;
480 nexttype[nexttoke] = type;
482 if (lex_state != LEX_KNOWNEXT) {
483 lex_defer = lex_state;
485 lex_state = LEX_KNOWNEXT;
490 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_tick)
495 start = skipspace(start);
498 (allow_pack && *s == ':') ||
499 (allow_tick && *s == '\'') )
501 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
502 if (check_keyword && keyword(tokenbuf, len))
504 if (token == METHOD) {
514 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
515 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
522 force_ident(register char *s, int kind)
525 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
526 nextval[nexttoke].opval = o;
529 dTHR; /* just for in_eval */
530 o->op_private = OPpCONST_ENTERED;
531 /* XXX see note in pp_entereval() for why we forgo typo
532 warnings if the symbol must be introduced in an eval.
534 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
535 kind == '$' ? SVt_PV :
536 kind == '@' ? SVt_PVAV :
537 kind == '%' ? SVt_PVHV :
545 force_version(char *s)
547 OP *version = Nullop;
551 /* default VERSION number -- GBARR */
556 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
557 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
559 /* real VERSION number -- GBARR */
560 version = yylval.opval;
564 /* NOTE: The parser sees the package name and the VERSION swapped */
565 nextval[nexttoke].opval = version;
582 s = SvPV_force(sv, len);
586 while (s < send && *s != '\\')
593 if (s + 1 < send && (s[1] == '\\'))
594 s++; /* all that, just for this */
599 SvCUR_set(sv, d - SvPVX(sv));
607 register I32 op_type = yylval.ival;
609 if (op_type == OP_NULL) {
610 yylval.opval = lex_op;
614 if (op_type == OP_CONST || op_type == OP_READLINE) {
615 SV *sv = q(lex_stuff);
617 char *p = SvPV(sv, len);
618 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
624 sublex_info.super_state = lex_state;
625 sublex_info.sub_inwhat = op_type;
626 sublex_info.sub_op = lex_op;
627 lex_state = LEX_INTERPPUSH;
631 yylval.opval = lex_op;
645 lex_state = sublex_info.super_state;
647 SAVEI32(lex_brackets);
648 SAVEI32(lex_fakebrack);
649 SAVEI32(lex_casemods);
654 SAVEI16(curcop->cop_line);
657 SAVEPPTR(oldoldbufptr);
660 SAVEPPTR(lex_brackstack);
661 SAVEPPTR(lex_casestack);
666 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
667 bufend += SvCUR(linestr);
673 New(899, lex_brackstack, 120, char);
674 New(899, lex_casestack, 12, char);
675 SAVEFREEPV(lex_brackstack);
676 SAVEFREEPV(lex_casestack);
678 *lex_casestack = '\0';
680 lex_state = LEX_INTERPCONCAT;
681 curcop->cop_line = multi_start;
683 lex_inwhat = sublex_info.sub_inwhat;
684 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
685 lex_inpat = sublex_info.sub_op;
697 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
701 if (lex_casemods) { /* oops, we've got some unbalanced parens */
702 lex_state = LEX_INTERPCASEMOD;
706 /* Is there a right-hand side to take care of? */
707 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
710 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
711 bufend += SvCUR(linestr);
717 *lex_casestack = '\0';
719 if (SvCOMPILED(lex_repl)) {
720 lex_state = LEX_INTERPNORMAL;
724 lex_state = LEX_INTERPCONCAT;
730 bufend = SvPVX(linestr);
731 bufend += SvCUR(linestr);
738 scan_const(char *start)
740 register char *send = bufend;
741 SV *sv = NEWSV(93, send - start);
742 register char *s = start;
743 register char *d = SvPVX(sv);
744 bool dorange = FALSE;
748 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
749 : (lex_inwhat & OP_TRANS)
753 while (s < send || dorange) {
754 if (lex_inwhat == OP_TRANS) {
759 SvGROW(sv, SvLEN(sv) + 256);
763 for (i = (U8)*d; i <= max; i++)
768 else if (*s == '-' && s+1 < send && s != start) {
773 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
774 while (s < send && *s != ')')
777 else if (*s == '#' && lex_inpat &&
778 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
779 while (s+1 < send && *s != '\n')
782 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
784 else if (*s == '$') {
785 if (!lex_inpat) /* not a regexp, so $ must be var */
787 if (s + 1 < send && !strchr(")| \n\t", s[1]))
788 break; /* in regexp, $ might be tail anchor */
790 if (*s == '\\' && s+1 < send) {
792 if (*s && strchr(leaveit, *s)) {
797 if (lex_inwhat == OP_SUBST && !lex_inpat &&
798 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
801 warn("\\%c better written as $%c", *s, *s);
805 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
811 if (lex_inwhat == OP_TRANS) {
819 case '0': case '1': case '2': case '3':
820 case '4': case '5': case '6': case '7':
821 *d++ = scan_oct(s, 3, &len);
825 *d++ = scan_hex(++s, 2, &len);
861 SvCUR_set(sv, d - SvPVX(sv));
864 if (SvCUR(sv) + 5 < SvLEN(sv)) {
865 SvLEN_set(sv, SvCUR(sv) + 1);
866 Renew(SvPVX(sv), SvLEN(sv), char);
869 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
875 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
877 intuit_more(register char *s)
881 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
883 if (*s != '{' && *s != '[')
888 /* In a pattern, so maybe we have {n,m}. */
905 /* On the other hand, maybe we have a character class */
908 if (*s == ']' || *s == '^')
911 int weight = 2; /* let's weigh the evidence */
913 unsigned char un_char = 0, last_un_char;
914 char *send = strchr(s,']');
915 char tmpbuf[sizeof tokenbuf * 4];
917 if (!send) /* has to be an expression */
923 else if (isDIGIT(*s)) {
925 if (isDIGIT(s[1]) && s[2] == ']')
931 for (; s < send; s++) {
932 last_un_char = un_char;
933 un_char = (unsigned char)*s;
938 weight -= seen[un_char] * 10;
940 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
941 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
946 else if (*s == '$' && s[1] &&
947 strchr("[#!%*<>()-=",s[1])) {
948 if (/*{*/ strchr("])} =",s[2]))
957 if (strchr("wds]",s[1]))
959 else if (seen['\''] || seen['"'])
961 else if (strchr("rnftbxcav",s[1]))
963 else if (isDIGIT(s[1])) {
965 while (s[1] && isDIGIT(s[1]))
975 if (strchr("aA01! ",last_un_char))
977 if (strchr("zZ79~",s[1]))
981 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
982 isALPHA(*s) && s[1] && isALPHA(s[1])) {
987 if (keyword(tmpbuf, d - tmpbuf))
990 if (un_char == last_un_char + 1)
992 weight -= seen[un_char];
997 if (weight >= 0) /* probably a character class */
1005 intuit_method(char *start, GV *gv)
1007 char *s = start + (*start == '$');
1008 char tmpbuf[sizeof tokenbuf];
1018 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1019 if (*start == '$') {
1020 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1025 return *s == '(' ? FUNCMETH : METHOD;
1027 if (!keyword(tmpbuf, len)) {
1028 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1029 if (indirgv && GvCVu(indirgv))
1031 /* filehandle or package name makes it a method */
1032 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1034 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1035 return 0; /* no assumptions -- "=>" quotes bearword */
1036 nextval[nexttoke].opval =
1037 (OP*)newSVOP(OP_CONST, 0,
1039 nextval[nexttoke].opval->op_private =
1044 return *s == '(' ? FUNCMETH : METHOD;
1054 char *pdb = getenv("PERL5DB");
1058 return "BEGIN { require 'perl5db.pl' }";
1064 /* Encoded script support. filter_add() effectively inserts a
1065 * 'pre-processing' function into the current source input stream.
1066 * Note that the filter function only applies to the current source file
1067 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1069 * The datasv parameter (which may be NULL) can be used to pass
1070 * private data to this instance of the filter. The filter function
1071 * can recover the SV using the FILTER_DATA macro and use it to
1072 * store private buffers and state information.
1074 * The supplied datasv parameter is upgraded to a PVIO type
1075 * and the IoDIRP field is used to store the function pointer.
1076 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1077 * private use must be set using malloc'd pointers.
1079 static int filter_debug = 0;
1082 filter_add(filter_t funcp, SV *datasv)
1084 if (!funcp){ /* temporary handy debugging hack to be deleted */
1085 filter_debug = atoi((char*)datasv);
1089 rsfp_filters = newAV();
1092 if (!SvUPGRADE(datasv, SVt_PVIO))
1093 die("Can't upgrade filter_add data to SVt_PVIO");
1094 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1096 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1097 av_unshift(rsfp_filters, 1);
1098 av_store(rsfp_filters, 0, datasv) ;
1103 /* Delete most recently added instance of this filter function. */
1105 filter_del(filter_t funcp)
1108 warn("filter_del func %p", funcp);
1109 if (!rsfp_filters || AvFILL(rsfp_filters)<0)
1111 /* if filter is on top of stack (usual case) just pop it off */
1112 if (IoDIRP(FILTER_DATA(0)) == (void*)funcp){
1113 /* sv_free(av_pop(rsfp_filters)); */
1114 sv_free(av_shift(rsfp_filters));
1118 /* we need to search for the correct entry and clear it */
1119 die("filter_del can only delete in reverse order (currently)");
1123 /* Invoke the n'th filter function for the current rsfp. */
1125 filter_read(int idx, SV *buf_sv, int maxlen)
1128 /* 0 = read one text line */
1135 if (idx > AvFILL(rsfp_filters)){ /* Any more filters? */
1136 /* Provide a default input filter to make life easy. */
1137 /* Note that we append to the line. This is handy. */
1139 warn("filter_read %d: from rsfp\n", idx);
1143 int old_len = SvCUR(buf_sv) ;
1145 /* ensure buf_sv is large enough */
1146 SvGROW(buf_sv, old_len + maxlen) ;
1147 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1148 if (PerlIO_error(rsfp))
1149 return -1; /* error */
1151 return 0 ; /* end of file */
1153 SvCUR_set(buf_sv, old_len + len) ;
1156 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1157 if (PerlIO_error(rsfp))
1158 return -1; /* error */
1160 return 0 ; /* end of file */
1163 return SvCUR(buf_sv);
1165 /* Skip this filter slot if filter has been deleted */
1166 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1168 warn("filter_read %d: skipped (filter deleted)\n", idx);
1169 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1171 /* Get function pointer hidden within datasv */
1172 funcp = (filter_t)IoDIRP(datasv);
1174 warn("filter_read %d: via function %p (%s)\n",
1175 idx, funcp, SvPV(datasv,na));
1176 /* Call function. The function is expected to */
1177 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1178 /* Return: <0:error, =0:eof, >0:not eof */
1179 return (*funcp)(idx, buf_sv, maxlen);
1183 filter_gets(register SV *sv, register FILE *fp, STRLEN append)
1188 SvCUR_set(sv, 0); /* start with empty line */
1189 if (FILTER_READ(0, sv, 0) > 0)
1190 return ( SvPVX(sv) ) ;
1195 return (sv_gets(sv, fp, append));
1201 static char* exp_name[] =
1202 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1205 EXT int yychar; /* last token */
1216 if (pending_ident) {
1217 char pit = pending_ident;
1221 if (strchr(tokenbuf,':'))
1222 croak(no_myglob,tokenbuf);
1223 yylval.opval = newOP(OP_PADANY, 0);
1224 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1228 if (!strchr(tokenbuf,':')) {
1230 /* Check for single character per-thread magicals */
1231 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1232 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-magicals */
1233 && (tmp = find_thread_magical(&tokenbuf[1])) != NOT_IN_PAD)
1235 yylval.opval = newOP(OP_SPECIFIC, 0);
1236 yylval.opval->op_targ = tmp;
1239 #endif /* USE_THREADS */
1240 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1241 if (last_lop_op == OP_SORT &&
1242 tokenbuf[0] == '$' &&
1243 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1246 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1247 croak("Can't use \"my %s\" in sort comparison",
1253 yylval.opval = newOP(OP_PADANY, 0);
1254 yylval.opval->op_targ = tmp;
1258 /* Force them to make up their mind on "@foo". */
1259 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1260 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1261 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1262 yyerror(form("In string, %s now must be written as \\%s",
1263 tokenbuf, tokenbuf));
1266 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1267 yylval.opval->op_private = OPpCONST_ENTERED;
1268 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1269 ((tokenbuf[0] == '$') ? SVt_PV
1270 : (tokenbuf[0] == '@') ? SVt_PVAV
1275 switch (lex_state) {
1277 case LEX_NORMAL: /* Some compilers will produce faster */
1278 case LEX_INTERPNORMAL: /* code if we comment these out. */
1284 yylval = nextval[nexttoke];
1286 lex_state = lex_defer;
1287 expect = lex_expect;
1288 lex_defer = LEX_NORMAL;
1290 return(nexttype[nexttoke]);
1292 case LEX_INTERPCASEMOD:
1294 if (bufptr != bufend && *bufptr != '\\')
1295 croak("panic: INTERPCASEMOD");
1297 if (bufptr == bufend || bufptr[1] == 'E') {
1300 oldmod = lex_casestack[--lex_casemods];
1301 lex_casestack[lex_casemods] = '\0';
1302 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1304 lex_state = LEX_INTERPCONCAT;
1308 if (bufptr != bufend)
1310 lex_state = LEX_INTERPCONCAT;
1315 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1316 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1317 if (strchr("LU", *s) &&
1318 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1320 lex_casestack[--lex_casemods] = '\0';
1323 if (lex_casemods > 10) {
1324 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1325 if (newlb != lex_casestack) {
1327 lex_casestack = newlb;
1330 lex_casestack[lex_casemods++] = *s;
1331 lex_casestack[lex_casemods] = '\0';
1332 lex_state = LEX_INTERPCONCAT;
1333 nextval[nexttoke].ival = 0;
1336 nextval[nexttoke].ival = OP_LCFIRST;
1338 nextval[nexttoke].ival = OP_UCFIRST;
1340 nextval[nexttoke].ival = OP_LC;
1342 nextval[nexttoke].ival = OP_UC;
1344 nextval[nexttoke].ival = OP_QUOTEMETA;
1346 croak("panic: yylex");
1358 case LEX_INTERPPUSH:
1359 return sublex_push();
1361 case LEX_INTERPSTART:
1362 if (bufptr == bufend)
1363 return sublex_done();
1365 lex_dojoin = (*bufptr == '@');
1366 lex_state = LEX_INTERPNORMAL;
1368 nextval[nexttoke].ival = 0;
1371 nextval[nexttoke].opval = newOP(OP_SPECIFIC, 0);
1372 nextval[nexttoke].opval->op_targ = find_thread_magical("\"");
1373 force_next(PRIVATEREF);
1375 force_ident("\"", '$');
1376 #endif /* USE_THREADS */
1377 nextval[nexttoke].ival = 0;
1379 nextval[nexttoke].ival = 0;
1381 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1390 case LEX_INTERPENDMAYBE:
1391 if (intuit_more(bufptr)) {
1392 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1400 lex_state = LEX_INTERPCONCAT;
1404 case LEX_INTERPCONCAT:
1407 croak("panic: INTERPCONCAT");
1409 if (bufptr == bufend)
1410 return sublex_done();
1412 if (SvIVX(linestr) == '\'') {
1413 SV *sv = newSVsv(linestr);
1416 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1420 s = scan_const(bufptr);
1422 lex_state = LEX_INTERPCASEMOD;
1424 lex_state = LEX_INTERPSTART;
1428 nextval[nexttoke] = yylval;
1441 lex_state = LEX_NORMAL;
1442 s = scan_formline(bufptr);
1449 oldoldbufptr = oldbufptr;
1452 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1458 croak("Unrecognized character \\%03o", *s & 255);
1461 goto fake_eof; /* emulate EOF on ^D or ^Z */
1467 yyerror("Missing right bracket");
1471 goto retry; /* ignore stray nulls */
1474 if (!in_eval && !preambled) {
1476 sv_setpv(linestr,incl_perldb());
1478 sv_catpv(linestr,";");
1480 while(AvFILL(preambleav) >= 0) {
1481 SV *tmpsv = av_shift(preambleav);
1482 sv_catsv(linestr, tmpsv);
1483 sv_catpv(linestr, ";");
1486 sv_free((SV*)preambleav);
1489 if (minus_n || minus_p) {
1490 sv_catpv(linestr, "LINE: while (<>) {");
1492 sv_catpv(linestr,"chomp;");
1494 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1496 GvIMPORTED_AV_on(gv);
1498 if (strchr("/'\"", *splitstr)
1499 && strchr(splitstr + 1, *splitstr))
1500 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1503 s = "'~#\200\1'"; /* surely one char is unused...*/
1504 while (s[1] && strchr(splitstr, *s)) s++;
1506 sv_catpvf(linestr, "@F=split(%s%c",
1507 "q" + (delim == '\''), delim);
1508 for (s = splitstr; *s; s++) {
1510 sv_catpvn(linestr, "\\", 1);
1511 sv_catpvn(linestr, s, 1);
1513 sv_catpvf(linestr, "%c);", delim);
1517 sv_catpv(linestr,"@F=split(' ');");
1520 sv_catpv(linestr, "\n");
1521 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1522 bufend = SvPVX(linestr) + SvCUR(linestr);
1523 if (PERLDB_LINE && curstash != debstash) {
1524 SV *sv = NEWSV(85,0);
1526 sv_upgrade(sv, SVt_PVMG);
1527 sv_setsv(sv,linestr);
1528 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1533 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1536 if (preprocess && !in_eval)
1537 (void)my_pclose(rsfp);
1538 else if ((PerlIO *)rsfp == PerlIO_stdin())
1539 PerlIO_clearerr(rsfp);
1541 (void)PerlIO_close(rsfp);
1546 if (!in_eval && (minus_n || minus_p)) {
1547 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1548 sv_catpv(linestr,";}");
1549 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1550 bufend = SvPVX(linestr) + SvCUR(linestr);
1551 minus_n = minus_p = 0;
1554 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1555 sv_setpv(linestr,"");
1556 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1559 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1562 /* Incest with pod. */
1563 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1564 sv_setpv(linestr, "");
1565 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1566 bufend = SvPVX(linestr) + SvCUR(linestr);
1571 } while (doextract);
1572 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1573 if (PERLDB_LINE && curstash != debstash) {
1574 SV *sv = NEWSV(85,0);
1576 sv_upgrade(sv, SVt_PVMG);
1577 sv_setsv(sv,linestr);
1578 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1580 bufend = SvPVX(linestr) + SvCUR(linestr);
1581 if (curcop->cop_line == 1) {
1582 while (s < bufend && isSPACE(*s))
1584 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1588 if (*s == '#' && *(s+1) == '!')
1590 #ifdef ALTERNATE_SHEBANG
1592 static char as[] = ALTERNATE_SHEBANG;
1593 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1594 d = s + (sizeof(as) - 1);
1596 #endif /* ALTERNATE_SHEBANG */
1605 while (*d && !isSPACE(*d))
1609 #ifdef ARG_ZERO_IS_SCRIPT
1610 if (ipathend > ipath) {
1612 * HP-UX (at least) sets argv[0] to the script name,
1613 * which makes $^X incorrect. And Digital UNIX and Linux,
1614 * at least, set argv[0] to the basename of the Perl
1615 * interpreter. So, having found "#!", we'll set it right.
1617 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1618 assert(SvPOK(x) || SvGMAGICAL(x));
1619 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1620 sv_setpvn(x, ipath, ipathend - ipath);
1623 TAINT_NOT; /* $^X is always tainted, but that's OK */
1625 #endif /* ARG_ZERO_IS_SCRIPT */
1630 d = instr(s,"perl -");
1632 d = instr(s,"perl");
1633 #ifdef ALTERNATE_SHEBANG
1635 * If the ALTERNATE_SHEBANG on this system starts with a
1636 * character that can be part of a Perl expression, then if
1637 * we see it but not "perl", we're probably looking at the
1638 * start of Perl code, not a request to hand off to some
1639 * other interpreter. Similarly, if "perl" is there, but
1640 * not in the first 'word' of the line, we assume the line
1641 * contains the start of the Perl program.
1643 if (d && *s != '#') {
1645 while (*c && !strchr("; \t\r\n\f\v#", *c))
1648 d = Nullch; /* "perl" not in first word; ignore */
1650 *s = '#'; /* Don't try to parse shebang line */
1652 #endif /* ALTERNATE_SHEBANG */
1657 !instr(s,"indir") &&
1658 instr(origargv[0],"perl"))
1664 while (s < bufend && isSPACE(*s))
1667 Newz(899,newargv,origargc+3,char*);
1669 while (s < bufend && !isSPACE(*s))
1672 Copy(origargv+1, newargv+2, origargc+1, char*);
1677 execv(ipath, newargv);
1678 croak("Can't exec %s", ipath);
1681 U32 oldpdb = perldb;
1682 bool oldn = minus_n;
1683 bool oldp = minus_p;
1685 while (*d && !isSPACE(*d)) d++;
1686 while (*d == ' ' || *d == '\t') d++;
1690 if (*d == 'M' || *d == 'm') {
1692 while (*d && !isSPACE(*d)) d++;
1693 croak("Too late for \"-%.*s\" option",
1696 d = moreswitches(d);
1698 if (PERLDB_LINE && !oldpdb ||
1699 ( minus_n || minus_p ) && !(oldn || oldp) )
1700 /* if we have already added "LINE: while (<>) {",
1701 we must not do it again */
1703 sv_setpv(linestr, "");
1704 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1705 bufend = SvPVX(linestr) + SvCUR(linestr);
1708 (void)gv_fetchfile(origfilename);
1715 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1717 lex_state = LEX_FORMLINE;
1722 warn("Illegal character \\%03o (carriage return)", '\r');
1724 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1725 case ' ': case '\t': case '\f': case 013:
1730 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1732 while (s < d && *s != '\n')
1737 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1739 lex_state = LEX_FORMLINE;
1749 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1754 while (s < bufend && (*s == ' ' || *s == '\t'))
1757 if (strnEQ(s,"=>",2)) {
1759 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1760 (int)tmp, (int)tmp);
1761 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1762 OPERATOR('-'); /* unary minus */
1764 last_uni = oldbufptr;
1765 last_lop_op = OP_FTEREAD; /* good enough */
1767 case 'r': FTST(OP_FTEREAD);
1768 case 'w': FTST(OP_FTEWRITE);
1769 case 'x': FTST(OP_FTEEXEC);
1770 case 'o': FTST(OP_FTEOWNED);
1771 case 'R': FTST(OP_FTRREAD);
1772 case 'W': FTST(OP_FTRWRITE);
1773 case 'X': FTST(OP_FTREXEC);
1774 case 'O': FTST(OP_FTROWNED);
1775 case 'e': FTST(OP_FTIS);
1776 case 'z': FTST(OP_FTZERO);
1777 case 's': FTST(OP_FTSIZE);
1778 case 'f': FTST(OP_FTFILE);
1779 case 'd': FTST(OP_FTDIR);
1780 case 'l': FTST(OP_FTLINK);
1781 case 'p': FTST(OP_FTPIPE);
1782 case 'S': FTST(OP_FTSOCK);
1783 case 'u': FTST(OP_FTSUID);
1784 case 'g': FTST(OP_FTSGID);
1785 case 'k': FTST(OP_FTSVTX);
1786 case 'b': FTST(OP_FTBLK);
1787 case 'c': FTST(OP_FTCHR);
1788 case 't': FTST(OP_FTTTY);
1789 case 'T': FTST(OP_FTTEXT);
1790 case 'B': FTST(OP_FTBINARY);
1791 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1792 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1793 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1795 croak("Unrecognized file test: -%c", (int)tmp);
1802 if (expect == XOPERATOR)
1807 else if (*s == '>') {
1810 if (isIDFIRST(*s)) {
1811 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1819 if (expect == XOPERATOR)
1822 if (isSPACE(*s) || !isSPACE(*bufptr))
1824 OPERATOR('-'); /* unary minus */
1831 if (expect == XOPERATOR)
1836 if (expect == XOPERATOR)
1839 if (isSPACE(*s) || !isSPACE(*bufptr))
1845 if (expect != XOPERATOR) {
1846 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1848 force_ident(tokenbuf, '*');
1861 if (expect == XOPERATOR) {
1866 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1869 yyerror("Final % should be \\% or %name");
1872 pending_ident = '%';
1894 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1895 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1900 if (curcop->cop_line < copline)
1901 copline = curcop->cop_line;
1912 if (lex_brackets <= 0)
1913 yyerror("Unmatched right bracket");
1916 if (lex_state == LEX_INTERPNORMAL) {
1917 if (lex_brackets == 0) {
1918 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1919 lex_state = LEX_INTERPEND;
1926 if (lex_brackets > 100) {
1927 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1928 if (newlb != lex_brackstack) {
1930 lex_brackstack = newlb;
1935 if (lex_formbrack) {
1939 if (oldoldbufptr == last_lop)
1940 lex_brackstack[lex_brackets++] = XTERM;
1942 lex_brackstack[lex_brackets++] = XOPERATOR;
1943 OPERATOR(HASHBRACK);
1945 while (s < bufend && (*s == ' ' || *s == '\t'))
1949 if (d < bufend && *d == '-') {
1952 while (d < bufend && (*d == ' ' || *d == '\t'))
1955 if (d < bufend && isIDFIRST(*d)) {
1956 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
1958 while (d < bufend && (*d == ' ' || *d == '\t'))
1961 char minus = (tokenbuf[0] == '-');
1963 (keyword(tokenbuf + 1, len) ||
1964 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
1965 perl_get_cv(tokenbuf + 1, FALSE) ))
1966 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
1967 tokenbuf + !minus, tokenbuf + !minus);
1968 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
1975 lex_brackstack[lex_brackets++] = XSTATE;
1979 lex_brackstack[lex_brackets++] = XOPERATOR;
1984 if (oldoldbufptr == last_lop)
1985 lex_brackstack[lex_brackets++] = XTERM;
1987 lex_brackstack[lex_brackets++] = XOPERATOR;
1990 OPERATOR(HASHBRACK);
1991 /* This hack serves to disambiguate a pair of curlies
1992 * as being a block or an anon hash. Normally, expectation
1993 * determines that, but in cases where we're not in a
1994 * position to expect anything in particular (like inside
1995 * eval"") we have to resolve the ambiguity. This code
1996 * covers the case where the first term in the curlies is a
1997 * quoted string. Most other cases need to be explicitly
1998 * disambiguated by prepending a `+' before the opening
1999 * curly in order to force resolution as an anon hash.
2001 * XXX should probably propagate the outer expectation
2002 * into eval"" to rely less on this hack, but that could
2003 * potentially break current behavior of eval"".
2007 if (*s == '\'' || *s == '"' || *s == '`') {
2008 /* common case: get past first string, handling escapes */
2009 for (t++; t < bufend && *t != *s;)
2010 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2014 else if (*s == 'q') {
2017 || ((*t == 'q' || *t == 'x') && ++t < bufend
2018 && !isALNUM(*t)))) {
2020 char open, close, term;
2023 while (t < bufend && isSPACE(*t))
2027 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2031 for (t++; t < bufend; t++) {
2032 if (*t == '\\' && t+1 < bufend && open != '\\')
2034 else if (*t == open)
2038 for (t++; t < bufend; t++) {
2039 if (*t == '\\' && t+1 < bufend)
2041 else if (*t == close && --brackets <= 0)
2043 else if (*t == open)
2049 else if (isALPHA(*s)) {
2050 for (t++; t < bufend && isALNUM(*t); t++) ;
2052 while (t < bufend && isSPACE(*t))
2054 /* if comma follows first term, call it an anon hash */
2055 /* XXX it could be a comma expression with loop modifiers */
2056 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2057 || (*t == '=' && t[1] == '>')))
2058 OPERATOR(HASHBRACK);
2062 lex_brackstack[lex_brackets-1] = XSTATE;
2068 yylval.ival = curcop->cop_line;
2069 if (isSPACE(*s) || *s == '#')
2070 copline = NOLINE; /* invalidate current command line number */
2075 if (lex_brackets <= 0)
2076 yyerror("Unmatched right bracket");
2078 expect = (expectation)lex_brackstack[--lex_brackets];
2079 if (lex_brackets < lex_formbrack)
2081 if (lex_state == LEX_INTERPNORMAL) {
2082 if (lex_brackets == 0) {
2083 if (lex_fakebrack) {
2084 lex_state = LEX_INTERPEND;
2086 return yylex(); /* ignore fake brackets */
2088 if (*s == '-' && s[1] == '>')
2089 lex_state = LEX_INTERPENDMAYBE;
2090 else if (*s != '[' && *s != '{')
2091 lex_state = LEX_INTERPEND;
2094 if (lex_brackets < lex_fakebrack) {
2097 return yylex(); /* ignore fake brackets */
2107 if (expect == XOPERATOR) {
2108 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2116 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2119 force_ident(tokenbuf, '&');
2123 yylval.ival = (OPpENTERSUB_AMPER<<8);
2142 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2143 warn("Reversed %c= operator",(int)tmp);
2145 if (expect == XSTATE && isALPHA(tmp) &&
2146 (s == linestart+1 || s[-2] == '\n') )
2148 if (in_eval && !rsfp) {
2153 if (strnEQ(s,"=cut",4)) {
2170 if (lex_brackets < lex_formbrack) {
2172 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2173 if (*t == '\n' || *t == '#') {
2191 if (expect != XOPERATOR) {
2192 if (s[1] != '<' && !strchr(s,'>'))
2195 s = scan_heredoc(s);
2197 s = scan_inputsymbol(s);
2198 TERM(sublex_start());
2203 SHop(OP_LEFT_SHIFT);
2217 SHop(OP_RIGHT_SHIFT);
2226 if (expect == XOPERATOR) {
2227 if (lex_formbrack && lex_brackets == lex_formbrack) {
2230 return ','; /* grandfather non-comma-format format */
2234 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2235 if (expect == XOPERATOR)
2236 no_op("Array length", bufptr);
2238 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2243 pending_ident = '#';
2247 if (expect == XOPERATOR)
2248 no_op("Scalar", bufptr);
2250 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2253 yyerror("Final $ should be \\$ or $name");
2257 /* This kludge not intended to be bulletproof. */
2258 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2259 yylval.opval = newSVOP(OP_CONST, 0,
2260 newSViv((IV)compiling.cop_arybase));
2261 yylval.opval->op_private = OPpCONST_ARYBASE;
2266 if (lex_state == LEX_NORMAL)
2269 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2275 isSPACE(*t) || isALNUM(*t) || *t == '$';
2278 bufptr = skipspace(bufptr);
2279 while (t < bufend && *t != ']')
2281 warn("Multidimensional syntax %.*s not supported",
2282 (t - bufptr) + 1, bufptr);
2286 else if (*s == '{') {
2288 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2289 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2291 char tmpbuf[sizeof tokenbuf];
2293 for (t++; isSPACE(*t); t++) ;
2294 if (isIDFIRST(*t)) {
2295 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2296 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2297 warn("You need to quote \"%s\"", tmpbuf);
2304 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2305 bool islop = (last_lop == oldoldbufptr);
2306 if (!islop || last_lop_op == OP_GREPSTART)
2308 else if (strchr("$@\"'`q", *s))
2309 expect = XTERM; /* e.g. print $fh "foo" */
2310 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2311 expect = XTERM; /* e.g. print $fh &sub */
2312 else if (isIDFIRST(*s)) {
2313 char tmpbuf[sizeof tokenbuf];
2314 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2315 if (tmp = keyword(tmpbuf, len)) {
2316 /* binary operators exclude handle interpretations */
2328 expect = XTERM; /* e.g. print $fh length() */
2333 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2334 if (gv && GvCVu(gv))
2335 expect = XTERM; /* e.g. print $fh subr() */
2338 else if (isDIGIT(*s))
2339 expect = XTERM; /* e.g. print $fh 3 */
2340 else if (*s == '.' && isDIGIT(s[1]))
2341 expect = XTERM; /* e.g. print $fh .3 */
2342 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2343 expect = XTERM; /* e.g. print $fh -1 */
2344 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2345 expect = XTERM; /* print $fh <<"EOF" */
2347 pending_ident = '$';
2351 if (expect == XOPERATOR)
2354 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2357 yyerror("Final @ should be \\@ or @name");
2360 if (lex_state == LEX_NORMAL)
2362 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2366 /* Warn about @ where they meant $. */
2368 if (*s == '[' || *s == '{') {
2370 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2372 if (*t == '}' || *t == ']') {
2374 bufptr = skipspace(bufptr);
2375 warn("Scalar value %.*s better written as $%.*s",
2376 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2381 pending_ident = '@';
2384 case '/': /* may either be division or pattern */
2385 case '?': /* may either be conditional or pattern */
2386 if (expect != XOPERATOR) {
2389 TERM(sublex_start());
2397 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2398 (s == linestart || s[-1] == '\n') ) {
2403 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2409 yylval.ival = OPf_SPECIAL;
2415 if (expect != XOPERATOR)
2420 case '0': case '1': case '2': case '3': case '4':
2421 case '5': case '6': case '7': case '8': case '9':
2423 if (expect == XOPERATOR)
2429 if (expect == XOPERATOR) {
2430 if (lex_formbrack && lex_brackets == lex_formbrack) {
2433 return ','; /* grandfather non-comma-format format */
2439 missingterm((char*)0);
2440 yylval.ival = OP_CONST;
2441 TERM(sublex_start());
2445 if (expect == XOPERATOR) {
2446 if (lex_formbrack && lex_brackets == lex_formbrack) {
2449 return ','; /* grandfather non-comma-format format */
2455 missingterm((char*)0);
2456 yylval.ival = OP_CONST;
2457 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2458 if (*d == '$' || *d == '@' || *d == '\\') {
2459 yylval.ival = OP_STRINGIFY;
2463 TERM(sublex_start());
2467 if (expect == XOPERATOR)
2468 no_op("Backticks",s);
2470 missingterm((char*)0);
2471 yylval.ival = OP_BACKTICK;
2473 TERM(sublex_start());
2477 if (dowarn && lex_inwhat && isDIGIT(*s))
2478 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2479 if (expect == XOPERATOR)
2480 no_op("Backslash",s);
2484 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2520 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2522 /* Some keywords can be followed by any delimiter, including ':' */
2523 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2524 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2525 (tokenbuf[0] == 'q' &&
2526 strchr("qwx", tokenbuf[1]))));
2528 /* x::* is just a word, unless x is "CORE" */
2529 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2533 while (d < bufend && isSPACE(*d))
2534 d++; /* no comments skipped here, or s### is misparsed */
2536 /* Is this a label? */
2537 if (!tmp && expect == XSTATE
2538 && d < bufend && *d == ':' && *(d + 1) != ':') {
2540 yylval.pval = savepv(tokenbuf);
2545 /* Check for keywords */
2546 tmp = keyword(tokenbuf, len);
2548 /* Is this a word before a => operator? */
2549 if (strnEQ(d,"=>",2)) {
2551 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2552 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2553 tokenbuf, tokenbuf);
2554 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2555 yylval.opval->op_private = OPpCONST_BARE;
2559 if (tmp < 0) { /* second-class keyword? */
2561 if (expect != XOPERATOR &&
2562 (*s != ':' || s[1] != ':') &&
2563 (gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2575 default: /* not a keyword */
2579 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2581 /* Get the rest if it looks like a package qualifier */
2583 if (*s == '\'' || *s == ':' && s[1] == ':') {
2584 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2587 croak("Bad name after %s::", tokenbuf);
2590 if (expect == XOPERATOR) {
2591 if (bufptr == linestart) {
2597 no_op("Bareword",s);
2600 /* Look for a subroutine with this name in current package. */
2602 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2604 /* Presume this is going to be a bareword of some sort. */
2607 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2608 yylval.opval->op_private = OPpCONST_BARE;
2610 /* See if it's the indirect object for a list operator. */
2613 oldoldbufptr < bufptr &&
2614 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2615 /* NO SKIPSPACE BEFORE HERE! */
2617 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2619 bool immediate_paren = *s == '(';
2621 /* (Now we can afford to cross potential line boundary.) */
2624 /* Two barewords in a row may indicate method call. */
2626 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2629 /* If not a declared subroutine, it's an indirect object. */
2630 /* (But it's an indir obj regardless for sort.) */
2632 if ((last_lop_op == OP_SORT ||
2633 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2634 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2635 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2640 /* If followed by a paren, it's certainly a subroutine. */
2646 if (gv && GvCVu(gv)) {
2647 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2648 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2653 nextval[nexttoke].opval = yylval.opval;
2660 /* If followed by var or block, call it a method (unless sub) */
2662 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2663 last_lop = oldbufptr;
2664 last_lop_op = OP_METHOD;
2668 /* If followed by a bareword, see if it looks like indir obj. */
2670 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2673 /* Not a method, so call it a subroutine (if defined) */
2675 if (gv && GvCVu(gv)) {
2677 if (lastchar == '-')
2678 warn("Ambiguous use of -%s resolved as -&%s()",
2679 tokenbuf, tokenbuf);
2680 last_lop = oldbufptr;
2681 last_lop_op = OP_ENTERSUB;
2682 /* Check for a constant sub */
2684 if ((sv = cv_const_sv(cv))) {
2686 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2687 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2688 yylval.opval->op_private = 0;
2692 /* Resolve to GV now. */
2693 op_free(yylval.opval);
2694 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2695 /* Is there a prototype? */
2698 char *proto = SvPV((SV*)cv, len);
2701 if (strEQ(proto, "$"))
2703 if (*proto == '&' && *s == '{') {
2704 sv_setpv(subname,"__ANON__");
2708 nextval[nexttoke].opval = yylval.opval;
2714 if (hints & HINT_STRICT_SUBS &&
2717 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2718 last_lop_op != OP_ACCEPT &&
2719 last_lop_op != OP_PIPE_OP &&
2720 last_lop_op != OP_SOCKPAIR)
2723 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2728 /* Call it a bare word */
2732 if (lastchar != '-') {
2733 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2735 warn(warn_reserved, tokenbuf);
2738 if (lastchar && strchr("*%&", lastchar)) {
2739 warn("Operator or semicolon missing before %c%s",
2740 lastchar, tokenbuf);
2741 warn("Ambiguous use of %c resolved as operator %c",
2742 lastchar, lastchar);
2748 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2749 newSVsv(GvSV(curcop->cop_filegv)));
2753 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2754 newSVpvf("%ld", (long)curcop->cop_line));
2757 case KEY___PACKAGE__:
2758 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2760 ? newSVsv(curstname)
2769 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2770 char *pname = "main";
2771 if (tokenbuf[2] == 'D')
2772 pname = HvNAME(curstash ? curstash : defstash);
2773 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2776 GvIOp(gv) = newIO();
2777 IoIFP(GvIOp(gv)) = rsfp;
2778 #if defined(HAS_FCNTL) && defined(F_SETFD)
2780 int fd = PerlIO_fileno(rsfp);
2781 fcntl(fd,F_SETFD,fd >= 3);
2784 /* Mark this internal pseudo-handle as clean */
2785 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2787 IoTYPE(GvIOp(gv)) = '|';
2788 else if ((PerlIO*)rsfp == PerlIO_stdin())
2789 IoTYPE(GvIOp(gv)) = '-';
2791 IoTYPE(GvIOp(gv)) = '<';
2802 if (expect == XSTATE) {
2809 if (*s == ':' && s[1] == ':') {
2812 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2813 tmp = keyword(tokenbuf, len);
2827 LOP(OP_ACCEPT,XTERM);
2833 LOP(OP_ATAN2,XTERM);
2842 LOP(OP_BLESS,XTERM);
2851 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2871 LOP(OP_CRYPT,XTERM);
2875 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2876 if (*d != '0' && isDIGIT(*d))
2877 yywarn("chmod: mode argument is missing initial 0");
2879 LOP(OP_CHMOD,XTERM);
2882 LOP(OP_CHOWN,XTERM);
2885 LOP(OP_CONNECT,XTERM);
2901 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2905 hints |= HINT_BLOCK_SCOPE;
2915 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2916 LOP(OP_DBMOPEN,XTERM);
2922 s = force_word(s,WORD,TRUE,FALSE,FALSE);
2929 yylval.ival = curcop->cop_line;
2943 expect = (*s == '{') ? XTERMBLOCK : XTERM;
2944 UNIBRACK(OP_ENTEREVAL);
2959 case KEY_endhostent:
2965 case KEY_endservent:
2968 case KEY_endprotoent:
2979 yylval.ival = curcop->cop_line;
2981 if (isIDFIRST(*s)) {
2983 if ((bufend - p) >= 3 &&
2984 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
2988 croak("Missing $ on loop variable");
2993 LOP(OP_FORMLINE,XTERM);
2999 LOP(OP_FCNTL,XTERM);
3005 LOP(OP_FLOCK,XTERM);
3014 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3017 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3032 case KEY_getpriority:
3033 LOP(OP_GETPRIORITY,XTERM);
3035 case KEY_getprotobyname:
3038 case KEY_getprotobynumber:
3039 LOP(OP_GPBYNUMBER,XTERM);
3041 case KEY_getprotoent:
3053 case KEY_getpeername:
3054 UNI(OP_GETPEERNAME);
3056 case KEY_gethostbyname:
3059 case KEY_gethostbyaddr:
3060 LOP(OP_GHBYADDR,XTERM);
3062 case KEY_gethostent:
3065 case KEY_getnetbyname:
3068 case KEY_getnetbyaddr:
3069 LOP(OP_GNBYADDR,XTERM);
3074 case KEY_getservbyname:
3075 LOP(OP_GSBYNAME,XTERM);
3077 case KEY_getservbyport:
3078 LOP(OP_GSBYPORT,XTERM);
3080 case KEY_getservent:
3083 case KEY_getsockname:
3084 UNI(OP_GETSOCKNAME);
3086 case KEY_getsockopt:
3087 LOP(OP_GSOCKOPT,XTERM);
3109 yylval.ival = curcop->cop_line;
3113 LOP(OP_INDEX,XTERM);
3119 LOP(OP_IOCTL,XTERM);
3131 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3162 LOP(OP_LISTEN,XTERM);
3172 TERM(sublex_start());
3175 LOP(OP_MAPSTART,XREF);
3178 LOP(OP_MKDIR,XTERM);
3181 LOP(OP_MSGCTL,XTERM);
3184 LOP(OP_MSGGET,XTERM);
3187 LOP(OP_MSGRCV,XTERM);
3190 LOP(OP_MSGSND,XTERM);
3195 if (isIDFIRST(*s)) {
3196 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3197 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3201 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3208 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3215 if (expect != XSTATE)
3216 yyerror("\"no\" not allowed in expression");
3217 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3218 s = force_version(s);
3227 if (isIDFIRST(*s)) {
3229 for (d = s; isALNUM(*d); d++) ;
3231 if (strchr("|&*+-=!?:.", *t))
3232 warn("Precedence problem: open %.*s should be open(%.*s)",
3238 yylval.ival = OP_OR;
3248 LOP(OP_OPEN_DIR,XTERM);
3251 checkcomma(s,tokenbuf,"filehandle");
3255 checkcomma(s,tokenbuf,"filehandle");
3274 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3278 LOP(OP_PIPE_OP,XTERM);
3283 missingterm((char*)0);
3284 yylval.ival = OP_CONST;
3285 TERM(sublex_start());
3293 missingterm((char*)0);
3294 if (dowarn && SvLEN(lex_stuff)) {
3295 d = SvPV_force(lex_stuff, len);
3296 for (; len; --len, ++d) {
3298 warn("Possible attempt to separate words with commas");
3302 warn("Possible attempt to put comments in qw() list");
3308 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3312 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3315 yylval.ival = OP_SPLIT;
3319 last_lop = oldbufptr;
3320 last_lop_op = OP_SPLIT;
3326 missingterm((char*)0);
3327 yylval.ival = OP_STRINGIFY;
3328 if (SvIVX(lex_stuff) == '\'')
3329 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3330 TERM(sublex_start());
3335 missingterm((char*)0);
3336 yylval.ival = OP_BACKTICK;
3338 TERM(sublex_start());
3345 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3346 if (isIDFIRST(*tokenbuf))
3347 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3349 yyerror("<> should be quotes");
3356 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3360 LOP(OP_RENAME,XTERM);
3369 LOP(OP_RINDEX,XTERM);
3392 LOP(OP_REVERSE,XTERM);
3403 TERM(sublex_start());
3405 TOKEN(1); /* force error */
3414 LOP(OP_SELECT,XTERM);
3420 LOP(OP_SEMCTL,XTERM);
3423 LOP(OP_SEMGET,XTERM);
3426 LOP(OP_SEMOP,XTERM);
3432 LOP(OP_SETPGRP,XTERM);
3434 case KEY_setpriority:
3435 LOP(OP_SETPRIORITY,XTERM);
3437 case KEY_sethostent:
3443 case KEY_setservent:
3446 case KEY_setprotoent:
3456 LOP(OP_SEEKDIR,XTERM);
3458 case KEY_setsockopt:
3459 LOP(OP_SSOCKOPT,XTERM);
3465 LOP(OP_SHMCTL,XTERM);
3468 LOP(OP_SHMGET,XTERM);
3471 LOP(OP_SHMREAD,XTERM);
3474 LOP(OP_SHMWRITE,XTERM);
3477 LOP(OP_SHUTDOWN,XTERM);
3486 LOP(OP_SOCKET,XTERM);
3488 case KEY_socketpair:
3489 LOP(OP_SOCKPAIR,XTERM);
3492 checkcomma(s,tokenbuf,"subroutine name");
3494 if (*s == ';' || *s == ')') /* probably a close */
3495 croak("sort is now a reserved word");
3497 s = force_word(s,WORD,TRUE,TRUE,TRUE);
3501 LOP(OP_SPLIT,XTERM);
3504 LOP(OP_SPRINTF,XTERM);
3507 LOP(OP_SPLICE,XTERM);
3523 LOP(OP_SUBSTR,XTERM);
3530 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3531 char tmpbuf[sizeof tokenbuf];
3533 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3534 if (strchr(tmpbuf, ':'))
3535 sv_setpv(subname, tmpbuf);
3537 sv_setsv(subname,curstname);
3538 sv_catpvn(subname,"::",2);
3539 sv_catpvn(subname,tmpbuf,len);
3541 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3545 expect = XTERMBLOCK;
3546 sv_setpv(subname,"?");
3549 if (tmp == KEY_format) {
3552 lex_formbrack = lex_brackets + 1;
3556 /* Look for a prototype */
3563 SvREFCNT_dec(lex_stuff);
3565 croak("Prototype not terminated");
3568 d = SvPVX(lex_stuff);
3570 for (p = d; *p; ++p) {
3575 SvCUR(lex_stuff) = tmp;
3578 nextval[1] = nextval[0];
3579 nexttype[1] = nexttype[0];
3580 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3581 nexttype[0] = THING;
3582 if (nexttoke == 1) {
3583 lex_defer = lex_state;
3584 lex_expect = expect;
3585 lex_state = LEX_KNOWNEXT;
3590 if (*SvPV(subname,na) == '?') {
3591 sv_setpv(subname,"__ANON__");
3598 LOP(OP_SYSTEM,XREF);
3601 LOP(OP_SYMLINK,XTERM);
3604 LOP(OP_SYSCALL,XTERM);
3607 LOP(OP_SYSOPEN,XTERM);
3610 LOP(OP_SYSSEEK,XTERM);
3613 LOP(OP_SYSREAD,XTERM);
3616 LOP(OP_SYSWRITE,XTERM);
3620 TERM(sublex_start());
3641 LOP(OP_TRUNCATE,XTERM);
3653 yylval.ival = curcop->cop_line;
3657 yylval.ival = curcop->cop_line;
3661 LOP(OP_UNLINK,XTERM);
3667 LOP(OP_UNPACK,XTERM);
3670 LOP(OP_UTIME,XTERM);
3674 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3675 if (*d != '0' && isDIGIT(*d))
3676 yywarn("umask: argument is missing initial 0");
3681 LOP(OP_UNSHIFT,XTERM);
3684 if (expect != XSTATE)
3685 yyerror("\"use\" not allowed in expression");
3688 s = force_version(s);
3689 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3690 nextval[nexttoke].opval = Nullop;
3695 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3696 s = force_version(s);
3709 yylval.ival = curcop->cop_line;
3713 hints |= HINT_BLOCK_SCOPE;
3720 LOP(OP_WAITPID,XTERM);
3726 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3730 if (expect == XOPERATOR)
3736 yylval.ival = OP_XOR;
3741 TERM(sublex_start());
3747 keyword(register char *d, I32 len)
3752 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3753 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3754 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3755 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3756 if (strEQ(d,"__END__")) return KEY___END__;
3760 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3765 if (strEQ(d,"and")) return -KEY_and;
3766 if (strEQ(d,"abs")) return -KEY_abs;
3769 if (strEQ(d,"alarm")) return -KEY_alarm;
3770 if (strEQ(d,"atan2")) return -KEY_atan2;
3773 if (strEQ(d,"accept")) return -KEY_accept;
3778 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3781 if (strEQ(d,"bless")) return -KEY_bless;
3782 if (strEQ(d,"bind")) return -KEY_bind;
3783 if (strEQ(d,"binmode")) return -KEY_binmode;
3786 if (strEQ(d,"CORE")) return -KEY_CORE;
3791 if (strEQ(d,"cmp")) return -KEY_cmp;
3792 if (strEQ(d,"chr")) return -KEY_chr;
3793 if (strEQ(d,"cos")) return -KEY_cos;
3796 if (strEQ(d,"chop")) return KEY_chop;
3799 if (strEQ(d,"close")) return -KEY_close;
3800 if (strEQ(d,"chdir")) return -KEY_chdir;
3801 if (strEQ(d,"chomp")) return KEY_chomp;
3802 if (strEQ(d,"chmod")) return -KEY_chmod;
3803 if (strEQ(d,"chown")) return -KEY_chown;
3804 if (strEQ(d,"crypt")) return -KEY_crypt;
3807 if (strEQ(d,"chroot")) return -KEY_chroot;
3808 if (strEQ(d,"caller")) return -KEY_caller;
3811 if (strEQ(d,"connect")) return -KEY_connect;
3814 if (strEQ(d,"closedir")) return -KEY_closedir;
3815 if (strEQ(d,"continue")) return -KEY_continue;
3820 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3825 if (strEQ(d,"do")) return KEY_do;
3828 if (strEQ(d,"die")) return -KEY_die;
3831 if (strEQ(d,"dump")) return -KEY_dump;
3834 if (strEQ(d,"delete")) return KEY_delete;
3837 if (strEQ(d,"defined")) return KEY_defined;
3838 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3841 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3846 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3847 if (strEQ(d,"END")) return KEY_END;
3852 if (strEQ(d,"eq")) return -KEY_eq;
3855 if (strEQ(d,"eof")) return -KEY_eof;
3856 if (strEQ(d,"exp")) return -KEY_exp;
3859 if (strEQ(d,"else")) return KEY_else;
3860 if (strEQ(d,"exit")) return -KEY_exit;
3861 if (strEQ(d,"eval")) return KEY_eval;
3862 if (strEQ(d,"exec")) return -KEY_exec;
3863 if (strEQ(d,"each")) return KEY_each;
3866 if (strEQ(d,"elsif")) return KEY_elsif;
3869 if (strEQ(d,"exists")) return KEY_exists;
3870 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3873 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3874 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3877 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3880 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3881 if (strEQ(d,"endservent")) return -KEY_endservent;
3884 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3891 if (strEQ(d,"for")) return KEY_for;
3894 if (strEQ(d,"fork")) return -KEY_fork;
3897 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3898 if (strEQ(d,"flock")) return -KEY_flock;
3901 if (strEQ(d,"format")) return KEY_format;
3902 if (strEQ(d,"fileno")) return -KEY_fileno;
3905 if (strEQ(d,"foreach")) return KEY_foreach;
3908 if (strEQ(d,"formline")) return -KEY_formline;
3914 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3915 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
3919 if (strnEQ(d,"get",3)) {
3924 if (strEQ(d,"ppid")) return -KEY_getppid;
3925 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
3928 if (strEQ(d,"pwent")) return -KEY_getpwent;
3929 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
3930 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
3933 if (strEQ(d,"peername")) return -KEY_getpeername;
3934 if (strEQ(d,"protoent")) return -KEY_getprotoent;
3935 if (strEQ(d,"priority")) return -KEY_getpriority;
3938 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
3941 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
3945 else if (*d == 'h') {
3946 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
3947 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
3948 if (strEQ(d,"hostent")) return -KEY_gethostent;
3950 else if (*d == 'n') {
3951 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
3952 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
3953 if (strEQ(d,"netent")) return -KEY_getnetent;
3955 else if (*d == 's') {
3956 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
3957 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
3958 if (strEQ(d,"servent")) return -KEY_getservent;
3959 if (strEQ(d,"sockname")) return -KEY_getsockname;
3960 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
3962 else if (*d == 'g') {
3963 if (strEQ(d,"grent")) return -KEY_getgrent;
3964 if (strEQ(d,"grnam")) return -KEY_getgrnam;
3965 if (strEQ(d,"grgid")) return -KEY_getgrgid;
3967 else if (*d == 'l') {
3968 if (strEQ(d,"login")) return -KEY_getlogin;
3970 else if (strEQ(d,"c")) return -KEY_getc;
3975 if (strEQ(d,"gt")) return -KEY_gt;
3976 if (strEQ(d,"ge")) return -KEY_ge;
3979 if (strEQ(d,"grep")) return KEY_grep;
3980 if (strEQ(d,"goto")) return KEY_goto;
3981 if (strEQ(d,"glob")) return KEY_glob;
3984 if (strEQ(d,"gmtime")) return -KEY_gmtime;
3989 if (strEQ(d,"hex")) return -KEY_hex;
3992 if (strEQ(d,"INIT")) return KEY_INIT;
3997 if (strEQ(d,"if")) return KEY_if;
4000 if (strEQ(d,"int")) return -KEY_int;
4003 if (strEQ(d,"index")) return -KEY_index;
4004 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4009 if (strEQ(d,"join")) return -KEY_join;
4013 if (strEQ(d,"keys")) return KEY_keys;
4014 if (strEQ(d,"kill")) return -KEY_kill;
4019 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4020 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4026 if (strEQ(d,"lt")) return -KEY_lt;
4027 if (strEQ(d,"le")) return -KEY_le;
4028 if (strEQ(d,"lc")) return -KEY_lc;
4031 if (strEQ(d,"log")) return -KEY_log;
4034 if (strEQ(d,"last")) return KEY_last;
4035 if (strEQ(d,"link")) return -KEY_link;
4036 if (strEQ(d,"lock")) return -KEY_lock;
4039 if (strEQ(d,"local")) return KEY_local;
4040 if (strEQ(d,"lstat")) return -KEY_lstat;
4043 if (strEQ(d,"length")) return -KEY_length;
4044 if (strEQ(d,"listen")) return -KEY_listen;
4047 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4050 if (strEQ(d,"localtime")) return -KEY_localtime;
4056 case 1: return KEY_m;
4058 if (strEQ(d,"my")) return KEY_my;
4061 if (strEQ(d,"map")) return KEY_map;
4064 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4067 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4068 if (strEQ(d,"msgget")) return -KEY_msgget;
4069 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4070 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4075 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4078 if (strEQ(d,"next")) return KEY_next;
4079 if (strEQ(d,"ne")) return -KEY_ne;
4080 if (strEQ(d,"not")) return -KEY_not;
4081 if (strEQ(d,"no")) return KEY_no;
4086 if (strEQ(d,"or")) return -KEY_or;
4089 if (strEQ(d,"ord")) return -KEY_ord;
4090 if (strEQ(d,"oct")) return -KEY_oct;
4093 if (strEQ(d,"open")) return -KEY_open;
4096 if (strEQ(d,"opendir")) return -KEY_opendir;
4103 if (strEQ(d,"pop")) return KEY_pop;
4104 if (strEQ(d,"pos")) return KEY_pos;
4107 if (strEQ(d,"push")) return KEY_push;
4108 if (strEQ(d,"pack")) return -KEY_pack;
4109 if (strEQ(d,"pipe")) return -KEY_pipe;
4112 if (strEQ(d,"print")) return KEY_print;
4115 if (strEQ(d,"printf")) return KEY_printf;
4118 if (strEQ(d,"package")) return KEY_package;
4121 if (strEQ(d,"prototype")) return KEY_prototype;
4126 if (strEQ(d,"q")) return KEY_q;
4127 if (strEQ(d,"qq")) return KEY_qq;
4128 if (strEQ(d,"qw")) return KEY_qw;
4129 if (strEQ(d,"qx")) return KEY_qx;
4131 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4136 if (strEQ(d,"ref")) return -KEY_ref;
4139 if (strEQ(d,"read")) return -KEY_read;
4140 if (strEQ(d,"rand")) return -KEY_rand;
4141 if (strEQ(d,"recv")) return -KEY_recv;
4142 if (strEQ(d,"redo")) return KEY_redo;
4145 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4146 if (strEQ(d,"reset")) return -KEY_reset;
4149 if (strEQ(d,"return")) return KEY_return;
4150 if (strEQ(d,"rename")) return -KEY_rename;
4151 if (strEQ(d,"rindex")) return -KEY_rindex;
4154 if (strEQ(d,"require")) return -KEY_require;
4155 if (strEQ(d,"reverse")) return -KEY_reverse;
4156 if (strEQ(d,"readdir")) return -KEY_readdir;
4159 if (strEQ(d,"readlink")) return -KEY_readlink;
4160 if (strEQ(d,"readline")) return -KEY_readline;
4161 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4164 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4170 case 0: return KEY_s;
4172 if (strEQ(d,"scalar")) return KEY_scalar;
4177 if (strEQ(d,"seek")) return -KEY_seek;
4178 if (strEQ(d,"send")) return -KEY_send;
4181 if (strEQ(d,"semop")) return -KEY_semop;
4184 if (strEQ(d,"select")) return -KEY_select;
4185 if (strEQ(d,"semctl")) return -KEY_semctl;
4186 if (strEQ(d,"semget")) return -KEY_semget;
4189 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4190 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4193 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4194 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4197 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4200 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4201 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4202 if (strEQ(d,"setservent")) return -KEY_setservent;
4205 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4206 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4213 if (strEQ(d,"shift")) return KEY_shift;
4216 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4217 if (strEQ(d,"shmget")) return -KEY_shmget;
4220 if (strEQ(d,"shmread")) return -KEY_shmread;
4223 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4224 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4229 if (strEQ(d,"sin")) return -KEY_sin;
4232 if (strEQ(d,"sleep")) return -KEY_sleep;
4235 if (strEQ(d,"sort")) return KEY_sort;
4236 if (strEQ(d,"socket")) return -KEY_socket;
4237 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4240 if (strEQ(d,"split")) return KEY_split;
4241 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4242 if (strEQ(d,"splice")) return KEY_splice;
4245 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4248 if (strEQ(d,"srand")) return -KEY_srand;
4251 if (strEQ(d,"stat")) return -KEY_stat;
4252 if (strEQ(d,"study")) return KEY_study;
4255 if (strEQ(d,"substr")) return -KEY_substr;
4256 if (strEQ(d,"sub")) return KEY_sub;
4261 if (strEQ(d,"system")) return -KEY_system;
4264 if (strEQ(d,"symlink")) return -KEY_symlink;
4265 if (strEQ(d,"syscall")) return -KEY_syscall;
4266 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4267 if (strEQ(d,"sysread")) return -KEY_sysread;
4268 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4271 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4280 if (strEQ(d,"tr")) return KEY_tr;
4283 if (strEQ(d,"tie")) return KEY_tie;
4286 if (strEQ(d,"tell")) return -KEY_tell;
4287 if (strEQ(d,"tied")) return KEY_tied;
4288 if (strEQ(d,"time")) return -KEY_time;
4291 if (strEQ(d,"times")) return -KEY_times;
4294 if (strEQ(d,"telldir")) return -KEY_telldir;
4297 if (strEQ(d,"truncate")) return -KEY_truncate;
4304 if (strEQ(d,"uc")) return -KEY_uc;
4307 if (strEQ(d,"use")) return KEY_use;
4310 if (strEQ(d,"undef")) return KEY_undef;
4311 if (strEQ(d,"until")) return KEY_until;
4312 if (strEQ(d,"untie")) return KEY_untie;
4313 if (strEQ(d,"utime")) return -KEY_utime;
4314 if (strEQ(d,"umask")) return -KEY_umask;
4317 if (strEQ(d,"unless")) return KEY_unless;
4318 if (strEQ(d,"unpack")) return -KEY_unpack;
4319 if (strEQ(d,"unlink")) return -KEY_unlink;
4322 if (strEQ(d,"unshift")) return KEY_unshift;
4323 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4328 if (strEQ(d,"values")) return -KEY_values;
4329 if (strEQ(d,"vec")) return -KEY_vec;
4334 if (strEQ(d,"warn")) return -KEY_warn;
4335 if (strEQ(d,"wait")) return -KEY_wait;
4338 if (strEQ(d,"while")) return KEY_while;
4339 if (strEQ(d,"write")) return -KEY_write;
4342 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4345 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4350 if (len == 1) return -KEY_x;
4351 if (strEQ(d,"xor")) return -KEY_xor;
4354 if (len == 1) return KEY_y;
4363 checkcomma(register char *s, char *name, char *what)
4367 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4369 for (w = s+2; *w && level; w++) {
4376 for (; *w && isSPACE(*w); w++) ;
4377 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4378 warn("%s (...) interpreted as function",name);
4380 while (s < bufend && isSPACE(*s))
4384 while (s < bufend && isSPACE(*s))
4386 if (isIDFIRST(*s)) {
4390 while (s < bufend && isSPACE(*s))
4395 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4399 croak("No comma allowed after %s", what);
4405 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4407 register char *d = dest;
4408 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4411 croak(ident_too_long);
4414 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4419 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4432 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4439 if (lex_brackets == 0)
4444 e = d + destlen - 3; /* two-character token, ending NUL */
4446 while (isDIGIT(*s)) {
4448 croak(ident_too_long);
4455 croak(ident_too_long);
4458 else if (*s == '\'' && isIDFIRST(s[1])) {
4463 else if (*s == ':' && s[1] == ':') {
4474 if (lex_state != LEX_NORMAL)
4475 lex_state = LEX_INTERPENDMAYBE;
4478 if (*s == '$' && s[1] &&
4479 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4481 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4482 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4495 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4500 if (isSPACE(s[-1])) {
4503 if (ch != ' ' && ch != '\t') {
4509 if (isIDFIRST(*d)) {
4511 while (isALNUM(*s) || *s == ':')
4514 while (s < send && (*s == ' ' || *s == '\t')) s++;
4515 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4516 if (dowarn && keyword(dest, d - dest)) {
4517 char *brack = *s == '[' ? "[...]" : "{...}";
4518 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4519 funny, dest, brack, funny, dest, brack);
4521 lex_fakebrack = lex_brackets+1;
4523 lex_brackstack[lex_brackets++] = XOPERATOR;
4529 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4530 lex_state = LEX_INTERPEND;
4533 if (dowarn && lex_state == LEX_NORMAL &&
4534 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4535 warn("Ambiguous use of %c{%s} resolved to %c%s",
4536 funny, dest, funny, dest);
4539 s = bracket; /* let the parser handle it */
4543 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4544 lex_state = LEX_INTERPEND;
4548 void pmflag(U16 *pmfl, int ch)
4553 *pmfl |= PMf_GLOBAL;
4555 *pmfl |= PMf_CONTINUE;
4559 *pmfl |= PMf_MULTILINE;
4561 *pmfl |= PMf_SINGLELINE;
4563 *pmfl |= PMf_EXTENDED;
4567 scan_pat(char *start)
4572 s = scan_str(start);
4575 SvREFCNT_dec(lex_stuff);
4577 croak("Search pattern not terminated");
4580 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4581 if (multi_open == '?')
4582 pm->op_pmflags |= PMf_ONCE;
4583 while (*s && strchr("iogcmsx", *s))
4584 pmflag(&pm->op_pmflags,*s++);
4585 pm->op_pmpermflags = pm->op_pmflags;
4588 yylval.ival = OP_MATCH;
4593 scan_subst(char *start)
4600 yylval.ival = OP_NULL;
4602 s = scan_str(start);
4606 SvREFCNT_dec(lex_stuff);
4608 croak("Substitution pattern not terminated");
4611 if (s[-1] == multi_open)
4614 first_start = multi_start;
4618 SvREFCNT_dec(lex_stuff);
4621 SvREFCNT_dec(lex_repl);
4623 croak("Substitution replacement not terminated");
4625 multi_start = first_start; /* so whole substitution is taken together */
4627 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4628 while (*s && strchr("iogcmsex", *s)) {
4634 pmflag(&pm->op_pmflags,*s++);
4639 pm->op_pmflags |= PMf_EVAL;
4640 repl = newSVpv("",0);
4642 sv_catpv(repl, es ? "eval " : "do ");
4643 sv_catpvn(repl, "{ ", 2);
4644 sv_catsv(repl, lex_repl);
4645 sv_catpvn(repl, " };", 2);
4646 SvCOMPILED_on(repl);
4647 SvREFCNT_dec(lex_repl);
4651 pm->op_pmpermflags = pm->op_pmflags;
4653 yylval.ival = OP_SUBST;
4658 hoistmust(register PMOP *pm)
4661 if (!pm->op_pmshort && pm->op_pmregexp->regstart &&
4662 (!pm->op_pmregexp->regmust || pm->op_pmregexp->reganch & ROPT_ANCH)
4664 if (!(pm->op_pmregexp->reganch & ROPT_ANCH))
4665 pm->op_pmflags |= PMf_SCANFIRST;
4666 pm->op_pmshort = SvREFCNT_inc(pm->op_pmregexp->regstart);
4667 pm->op_pmslen = SvCUR(pm->op_pmshort);
4669 else if (pm->op_pmregexp->regmust) {/* is there a better short-circuit? */
4670 if (pm->op_pmshort &&
4671 sv_eq(pm->op_pmshort,pm->op_pmregexp->regmust))
4673 if (pm->op_pmflags & PMf_SCANFIRST) {
4674 SvREFCNT_dec(pm->op_pmshort);
4675 pm->op_pmshort = Nullsv;
4678 SvREFCNT_dec(pm->op_pmregexp->regmust);
4679 pm->op_pmregexp->regmust = Nullsv;
4683 /* promote the better string */
4684 if ((!pm->op_pmshort &&
4685 !(pm->op_pmregexp->reganch & ROPT_ANCH_GPOS)) ||
4686 ((pm->op_pmflags & PMf_SCANFIRST) &&
4687 (SvCUR(pm->op_pmshort) < SvCUR(pm->op_pmregexp->regmust)))) {
4688 SvREFCNT_dec(pm->op_pmshort); /* ok if null */
4689 pm->op_pmshort = pm->op_pmregexp->regmust;
4690 pm->op_pmslen = SvCUR(pm->op_pmshort);
4691 pm->op_pmregexp->regmust = Nullsv;
4692 pm->op_pmflags |= PMf_SCANFIRST;
4698 scan_trans(char *start)
4707 yylval.ival = OP_NULL;
4709 s = scan_str(start);
4712 SvREFCNT_dec(lex_stuff);
4714 croak("Translation pattern not terminated");
4716 if (s[-1] == multi_open)
4722 SvREFCNT_dec(lex_stuff);
4725 SvREFCNT_dec(lex_repl);
4727 croak("Translation replacement not terminated");
4730 New(803,tbl,256,short);
4731 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4733 complement = Delete = squash = 0;
4734 while (*s == 'c' || *s == 'd' || *s == 's') {
4736 complement = OPpTRANS_COMPLEMENT;
4738 Delete = OPpTRANS_DELETE;
4740 squash = OPpTRANS_SQUASH;
4743 o->op_private = Delete|squash|complement;
4746 yylval.ival = OP_TRANS;
4751 scan_heredoc(register char *s)
4755 I32 op_type = OP_SCALAR;
4762 int outer = (rsfp && !lex_inwhat);
4766 e = tokenbuf + sizeof tokenbuf - 1;
4769 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4770 if (*peek && strchr("`'\"",*peek)) {
4773 s = delimcpy(d, e, s, bufend, term, &len);
4784 deprecate("bare << to mean <<\"\"");
4785 for (; isALNUM(*s); s++) {
4790 if (d >= tokenbuf + sizeof tokenbuf - 1)
4791 croak("Delimiter for here document is too long");
4796 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4797 herewas = newSVpv(s,bufend-s);
4799 s--, herewas = newSVpv(s,d-s);
4800 s += SvCUR(herewas);
4802 tmpstr = NEWSV(87,80);
4803 sv_upgrade(tmpstr, SVt_PVIV);
4808 else if (term == '`') {
4809 op_type = OP_BACKTICK;
4810 SvIVX(tmpstr) = '\\';
4814 multi_start = curcop->cop_line;
4815 multi_open = multi_close = '<';
4819 while (s < bufend &&
4820 (*s != term || memNE(s,tokenbuf,len)) ) {
4825 curcop->cop_line = multi_start;
4826 missingterm(tokenbuf);
4828 sv_setpvn(tmpstr,d+1,s-d);
4830 sv_catpvn(herewas,s,bufend-s);
4831 sv_setsv(linestr,herewas);
4832 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4833 bufend = SvPVX(linestr) + SvCUR(linestr);
4836 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4837 while (s >= bufend) { /* multiple line string? */
4839 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4840 curcop->cop_line = multi_start;
4841 missingterm(tokenbuf);
4844 if (PERLDB_LINE && curstash != debstash) {
4845 SV *sv = NEWSV(88,0);
4847 sv_upgrade(sv, SVt_PVMG);
4848 sv_setsv(sv,linestr);
4849 av_store(GvAV(curcop->cop_filegv),
4850 (I32)curcop->cop_line,sv);
4852 bufend = SvPVX(linestr) + SvCUR(linestr);
4853 if (*s == term && memEQ(s,tokenbuf,len)) {
4856 sv_catsv(linestr,herewas);
4857 bufend = SvPVX(linestr) + SvCUR(linestr);
4861 sv_catsv(tmpstr,linestr);
4864 multi_end = curcop->cop_line;
4866 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4867 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4868 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4870 SvREFCNT_dec(herewas);
4872 yylval.ival = op_type;
4877 scan_inputsymbol(char *start)
4879 register char *s = start;
4885 e = tokenbuf + sizeof tokenbuf;
4886 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4887 if (len >= sizeof tokenbuf)
4888 croak("Excessively long <> operator");
4890 croak("Unterminated <> operator");
4892 if (*d == '$' && d[1]) d++;
4893 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4895 if (d - tokenbuf != len) {
4896 yylval.ival = OP_GLOB;
4898 s = scan_str(start);
4900 croak("Glob not terminated");
4906 (void)strcpy(d,"ARGV");
4909 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4910 OP *o = newOP(OP_PADSV, 0);
4912 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4915 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4916 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4917 newUNOP(OP_RV2GV, 0,
4918 newUNOP(OP_RV2SV, 0,
4919 newGVOP(OP_GV, 0, gv))));
4921 yylval.ival = OP_NULL;
4924 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4925 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4926 yylval.ival = OP_NULL;
4933 scan_str(char *start)
4938 register char *s = start;
4947 multi_start = curcop->cop_line;
4949 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4954 sv_upgrade(sv, SVt_PVIV);
4956 (void)SvPOK_only(sv); /* validate pointer */
4959 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
4960 to = SvPVX(sv)+SvCUR(sv);
4961 if (multi_open == multi_close) {
4962 for (; s < bufend; s++,to++) {
4963 if (*s == '\n' && !rsfp)
4965 if (*s == '\\' && s+1 < bufend && term != '\\') {
4971 else if (*s == term)
4977 for (; s < bufend; s++,to++) {
4978 if (*s == '\n' && !rsfp)
4980 if (*s == '\\' && s+1 < bufend) {
4981 if ((s[1] == multi_open) || (s[1] == multi_close))
4986 else if (*s == multi_close && --brackets <= 0)
4988 else if (*s == multi_open)
4994 SvCUR_set(sv, to - SvPVX(sv));
4996 if (s < bufend) break; /* string ends on this line? */
4999 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5001 curcop->cop_line = multi_start;
5005 if (PERLDB_LINE && curstash != debstash) {
5006 SV *sv = NEWSV(88,0);
5008 sv_upgrade(sv, SVt_PVMG);
5009 sv_setsv(sv,linestr);
5010 av_store(GvAV(curcop->cop_filegv),
5011 (I32)curcop->cop_line, sv);
5013 bufend = SvPVX(linestr) + SvCUR(linestr);
5015 multi_end = curcop->cop_line;
5017 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5018 SvLEN_set(sv, SvCUR(sv) + 1);
5019 Renew(SvPVX(sv), SvLEN(sv), char);
5029 scan_num(char *start)
5031 register char *s = start;
5039 static char number_too_long[] = "Number too long";
5043 croak("panic: scan_num");
5048 bool overflowed = FALSE;
5054 else if (s[1] == '.')
5070 yyerror("Illegal octal digit");
5072 case '0': case '1': case '2': case '3': case '4':
5073 case '5': case '6': case '7':
5076 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5077 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5083 if (!overflowed && (n >> shift) != u) {
5084 warn("Integer overflow in %s number",
5085 (shift == 4) ? "hex" : "octal");
5097 case '1': case '2': case '3': case '4': case '5':
5098 case '6': case '7': case '8': case '9': case '.':
5101 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5103 while (isDIGIT(*s) || *s == '_') {
5105 if (dowarn && lastub && s - lastub != 3)
5106 warn("Misplaced _ in number");
5111 croak(number_too_long);
5115 if (dowarn && lastub && s - lastub != 3)
5116 warn("Misplaced _ in number");
5117 if (*s == '.' && s[1] != '.') {
5120 for (; isDIGIT(*s) || *s == '_'; s++) {
5122 croak(number_too_long);
5127 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5130 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5131 if (*s == '+' || *s == '-')
5133 while (isDIGIT(*s)) {
5135 croak(number_too_long);
5141 SET_NUMERIC_STANDARD();
5142 value = atof(tokenbuf);
5144 if (!floatit && (double)tryiv == value)
5145 sv_setiv(sv, tryiv);
5147 sv_setnv(sv, value);
5151 yylval.opval = newSVOP(OP_CONST, 0, sv);
5157 scan_formline(register char *s)
5162 SV *stuff = newSVpv("",0);
5163 bool needargs = FALSE;
5166 if (*s == '.' || *s == '}') {
5168 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5172 if (in_eval && !rsfp) {
5173 eol = strchr(s,'\n');
5178 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5180 for (t = s; t < eol; t++) {
5181 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5183 goto enough; /* ~~ must be first line in formline */
5185 if (*t == '@' || *t == '^')
5188 sv_catpvn(stuff, s, eol-s);
5192 s = filter_gets(linestr, rsfp, 0);
5193 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5194 bufend = bufptr + SvCUR(linestr);
5197 yyerror("Format not terminated");
5207 lex_state = LEX_NORMAL;
5208 nextval[nexttoke].ival = 0;
5212 lex_state = LEX_FORMLINE;
5213 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5215 nextval[nexttoke].ival = OP_FORMLINE;
5219 SvREFCNT_dec(stuff);
5231 cshlen = strlen(cshname);
5236 start_subparse(I32 is_format, U32 flags)
5239 I32 oldsavestack_ix = savestack_ix;
5240 CV* outsidecv = compcv;
5244 assert(SvTYPE(compcv) == SVt_PVCV);
5251 SAVESPTR(comppad_name);
5253 SAVEI32(comppad_name_fill);
5254 SAVEI32(min_intro_pending);
5255 SAVEI32(max_intro_pending);
5256 SAVEI32(pad_reset_pending);
5258 compcv = (CV*)NEWSV(1104,0);
5259 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5260 CvFLAGS(compcv) |= flags;
5263 av_push(comppad, Nullsv);
5264 curpad = AvARRAY(comppad);
5265 comppad_name = newAV();
5266 comppad_name_fill = 0;
5267 min_intro_pending = 0;
5269 subline = curcop->cop_line;
5271 av_store(comppad_name, 0, newSVpv("@_", 2));
5272 curpad[0] = (SV*)newAV();
5273 SvPADMY_on(curpad[0]); /* XXX Needed? */
5274 CvOWNER(compcv) = 0;
5275 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5276 MUTEX_INIT(CvMUTEXP(compcv));
5277 #endif /* USE_THREADS */
5279 comppadlist = newAV();
5280 AvREAL_off(comppadlist);
5281 av_store(comppadlist, 0, (SV*)comppad_name);
5282 av_store(comppadlist, 1, (SV*)comppad);
5284 CvPADLIST(compcv) = comppadlist;
5285 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5287 CvOWNER(compcv) = 0;
5288 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5289 MUTEX_INIT(CvMUTEXP(compcv));
5290 #endif /* USE_THREADS */
5292 return oldsavestack_ix;
5311 char *context = NULL;
5315 if (!yychar || (yychar == ';' && !rsfp))
5317 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5318 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5319 while (isSPACE(*oldoldbufptr))
5321 context = oldoldbufptr;
5322 contlen = bufptr - oldoldbufptr;
5324 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5325 oldbufptr != bufptr) {
5326 while (isSPACE(*oldbufptr))
5328 context = oldbufptr;
5329 contlen = bufptr - oldbufptr;
5331 else if (yychar > 255)
5332 where = "next token ???";
5333 else if ((yychar & 127) == 127) {
5334 if (lex_state == LEX_NORMAL ||
5335 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5336 where = "at end of line";
5338 where = "within pattern";
5340 where = "within string";
5343 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5345 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5346 else if (isPRINT_LC(yychar))
5347 sv_catpvf(where_sv, "%c", yychar);
5349 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5350 where = SvPVX(where_sv);
5352 msg = sv_2mortal(newSVpv(s, 0));
5353 sv_catpvf(msg, " at %_ line %ld, ",
5354 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5356 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5358 sv_catpvf(msg, "%s\n", where);
5359 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5361 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5362 (int)multi_open,(int)multi_close,(long)multi_start);
5368 sv_catsv(GvSV(errgv), msg);
5370 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5371 if (++error_count >= 10)
5372 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5374 in_my_stash = Nullhv;