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(AvFILL(rsfp_filters))) == (void*)funcp){
1113 sv_free(av_pop(rsfp_filters));
1117 /* we need to search for the correct entry and clear it */
1118 die("filter_del can only delete in reverse order (currently)");
1122 /* Invoke the n'th filter function for the current rsfp. */
1124 filter_read(int idx, SV *buf_sv, int maxlen)
1127 /* 0 = read one text line */
1134 if (idx > AvFILL(rsfp_filters)){ /* Any more filters? */
1135 /* Provide a default input filter to make life easy. */
1136 /* Note that we append to the line. This is handy. */
1138 warn("filter_read %d: from rsfp\n", idx);
1142 int old_len = SvCUR(buf_sv) ;
1144 /* ensure buf_sv is large enough */
1145 SvGROW(buf_sv, old_len + maxlen) ;
1146 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1147 if (PerlIO_error(rsfp))
1148 return -1; /* error */
1150 return 0 ; /* end of file */
1152 SvCUR_set(buf_sv, old_len + len) ;
1155 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1156 if (PerlIO_error(rsfp))
1157 return -1; /* error */
1159 return 0 ; /* end of file */
1162 return SvCUR(buf_sv);
1164 /* Skip this filter slot if filter has been deleted */
1165 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1167 warn("filter_read %d: skipped (filter deleted)\n", idx);
1168 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1170 /* Get function pointer hidden within datasv */
1171 funcp = (filter_t)IoDIRP(datasv);
1173 warn("filter_read %d: via function %p (%s)\n",
1174 idx, funcp, SvPV(datasv,na));
1175 /* Call function. The function is expected to */
1176 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1177 /* Return: <0:error, =0:eof, >0:not eof */
1178 return (*funcp)(idx, buf_sv, maxlen);
1182 filter_gets(register SV *sv, register FILE *fp, STRLEN append)
1187 SvCUR_set(sv, 0); /* start with empty line */
1188 if (FILTER_READ(0, sv, 0) > 0)
1189 return ( SvPVX(sv) ) ;
1194 return (sv_gets(sv, fp, append));
1200 static char* exp_name[] =
1201 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1204 EXT int yychar; /* last token */
1215 if (pending_ident) {
1216 char pit = pending_ident;
1220 if (strchr(tokenbuf,':'))
1221 croak(no_myglob,tokenbuf);
1222 yylval.opval = newOP(OP_PADANY, 0);
1223 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1227 if (!strchr(tokenbuf,':')) {
1229 /* Check for single character per-thread SVs */
1230 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1231 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1232 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1234 yylval.opval = newOP(OP_THREADSV, 0);
1235 yylval.opval->op_targ = tmp;
1238 #endif /* USE_THREADS */
1239 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1240 if (last_lop_op == OP_SORT &&
1241 tokenbuf[0] == '$' &&
1242 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1245 for (d = in_eval ? oldoldbufptr : linestart;
1246 d < bufend && *d != '\n';
1249 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1250 croak("Can't use \"my %s\" in sort comparison",
1256 yylval.opval = newOP(OP_PADANY, 0);
1257 yylval.opval->op_targ = tmp;
1262 /* Force them to make up their mind on "@foo". */
1263 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1264 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1265 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1266 yyerror(form("In string, %s now must be written as \\%s",
1267 tokenbuf, tokenbuf));
1270 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1271 yylval.opval->op_private = OPpCONST_ENTERED;
1272 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1273 ((tokenbuf[0] == '$') ? SVt_PV
1274 : (tokenbuf[0] == '@') ? SVt_PVAV
1279 switch (lex_state) {
1281 case LEX_NORMAL: /* Some compilers will produce faster */
1282 case LEX_INTERPNORMAL: /* code if we comment these out. */
1288 yylval = nextval[nexttoke];
1290 lex_state = lex_defer;
1291 expect = lex_expect;
1292 lex_defer = LEX_NORMAL;
1294 return(nexttype[nexttoke]);
1296 case LEX_INTERPCASEMOD:
1298 if (bufptr != bufend && *bufptr != '\\')
1299 croak("panic: INTERPCASEMOD");
1301 if (bufptr == bufend || bufptr[1] == 'E') {
1304 oldmod = lex_casestack[--lex_casemods];
1305 lex_casestack[lex_casemods] = '\0';
1306 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1308 lex_state = LEX_INTERPCONCAT;
1312 if (bufptr != bufend)
1314 lex_state = LEX_INTERPCONCAT;
1319 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1320 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1321 if (strchr("LU", *s) &&
1322 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1324 lex_casestack[--lex_casemods] = '\0';
1327 if (lex_casemods > 10) {
1328 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1329 if (newlb != lex_casestack) {
1331 lex_casestack = newlb;
1334 lex_casestack[lex_casemods++] = *s;
1335 lex_casestack[lex_casemods] = '\0';
1336 lex_state = LEX_INTERPCONCAT;
1337 nextval[nexttoke].ival = 0;
1340 nextval[nexttoke].ival = OP_LCFIRST;
1342 nextval[nexttoke].ival = OP_UCFIRST;
1344 nextval[nexttoke].ival = OP_LC;
1346 nextval[nexttoke].ival = OP_UC;
1348 nextval[nexttoke].ival = OP_QUOTEMETA;
1350 croak("panic: yylex");
1362 case LEX_INTERPPUSH:
1363 return sublex_push();
1365 case LEX_INTERPSTART:
1366 if (bufptr == bufend)
1367 return sublex_done();
1369 lex_dojoin = (*bufptr == '@');
1370 lex_state = LEX_INTERPNORMAL;
1372 nextval[nexttoke].ival = 0;
1375 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1376 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1377 force_next(PRIVATEREF);
1379 force_ident("\"", '$');
1380 #endif /* USE_THREADS */
1381 nextval[nexttoke].ival = 0;
1383 nextval[nexttoke].ival = 0;
1385 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1394 case LEX_INTERPENDMAYBE:
1395 if (intuit_more(bufptr)) {
1396 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1404 lex_state = LEX_INTERPCONCAT;
1408 case LEX_INTERPCONCAT:
1411 croak("panic: INTERPCONCAT");
1413 if (bufptr == bufend)
1414 return sublex_done();
1416 if (SvIVX(linestr) == '\'') {
1417 SV *sv = newSVsv(linestr);
1420 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1424 s = scan_const(bufptr);
1426 lex_state = LEX_INTERPCASEMOD;
1428 lex_state = LEX_INTERPSTART;
1432 nextval[nexttoke] = yylval;
1445 lex_state = LEX_NORMAL;
1446 s = scan_formline(bufptr);
1453 oldoldbufptr = oldbufptr;
1456 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1462 croak("Unrecognized character \\%03o", *s & 255);
1465 goto fake_eof; /* emulate EOF on ^D or ^Z */
1471 yyerror("Missing right bracket");
1475 goto retry; /* ignore stray nulls */
1478 if (!in_eval && !preambled) {
1480 sv_setpv(linestr,incl_perldb());
1482 sv_catpv(linestr,";");
1484 while(AvFILL(preambleav) >= 0) {
1485 SV *tmpsv = av_shift(preambleav);
1486 sv_catsv(linestr, tmpsv);
1487 sv_catpv(linestr, ";");
1490 sv_free((SV*)preambleav);
1493 if (minus_n || minus_p) {
1494 sv_catpv(linestr, "LINE: while (<>) {");
1496 sv_catpv(linestr,"chomp;");
1498 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1500 GvIMPORTED_AV_on(gv);
1502 if (strchr("/'\"", *splitstr)
1503 && strchr(splitstr + 1, *splitstr))
1504 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1507 s = "'~#\200\1'"; /* surely one char is unused...*/
1508 while (s[1] && strchr(splitstr, *s)) s++;
1510 sv_catpvf(linestr, "@F=split(%s%c",
1511 "q" + (delim == '\''), delim);
1512 for (s = splitstr; *s; s++) {
1514 sv_catpvn(linestr, "\\", 1);
1515 sv_catpvn(linestr, s, 1);
1517 sv_catpvf(linestr, "%c);", delim);
1521 sv_catpv(linestr,"@F=split(' ');");
1524 sv_catpv(linestr, "\n");
1525 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1526 bufend = SvPVX(linestr) + SvCUR(linestr);
1527 if (PERLDB_LINE && curstash != debstash) {
1528 SV *sv = NEWSV(85,0);
1530 sv_upgrade(sv, SVt_PVMG);
1531 sv_setsv(sv,linestr);
1532 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1537 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1540 if (preprocess && !in_eval)
1541 (void)my_pclose(rsfp);
1542 else if ((PerlIO *)rsfp == PerlIO_stdin())
1543 PerlIO_clearerr(rsfp);
1545 (void)PerlIO_close(rsfp);
1550 if (!in_eval && (minus_n || minus_p)) {
1551 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1552 sv_catpv(linestr,";}");
1553 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1554 bufend = SvPVX(linestr) + SvCUR(linestr);
1555 minus_n = minus_p = 0;
1558 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1559 sv_setpv(linestr,"");
1560 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1563 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1566 /* Incest with pod. */
1567 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1568 sv_setpv(linestr, "");
1569 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1570 bufend = SvPVX(linestr) + SvCUR(linestr);
1575 } while (doextract);
1576 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1577 if (PERLDB_LINE && curstash != debstash) {
1578 SV *sv = NEWSV(85,0);
1580 sv_upgrade(sv, SVt_PVMG);
1581 sv_setsv(sv,linestr);
1582 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1584 bufend = SvPVX(linestr) + SvCUR(linestr);
1585 if (curcop->cop_line == 1) {
1586 while (s < bufend && isSPACE(*s))
1588 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1592 if (*s == '#' && *(s+1) == '!')
1594 #ifdef ALTERNATE_SHEBANG
1596 static char as[] = ALTERNATE_SHEBANG;
1597 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1598 d = s + (sizeof(as) - 1);
1600 #endif /* ALTERNATE_SHEBANG */
1609 while (*d && !isSPACE(*d))
1613 #ifdef ARG_ZERO_IS_SCRIPT
1614 if (ipathend > ipath) {
1616 * HP-UX (at least) sets argv[0] to the script name,
1617 * which makes $^X incorrect. And Digital UNIX and Linux,
1618 * at least, set argv[0] to the basename of the Perl
1619 * interpreter. So, having found "#!", we'll set it right.
1621 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1622 assert(SvPOK(x) || SvGMAGICAL(x));
1623 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1624 sv_setpvn(x, ipath, ipathend - ipath);
1627 TAINT_NOT; /* $^X is always tainted, but that's OK */
1629 #endif /* ARG_ZERO_IS_SCRIPT */
1634 d = instr(s,"perl -");
1636 d = instr(s,"perl");
1637 #ifdef ALTERNATE_SHEBANG
1639 * If the ALTERNATE_SHEBANG on this system starts with a
1640 * character that can be part of a Perl expression, then if
1641 * we see it but not "perl", we're probably looking at the
1642 * start of Perl code, not a request to hand off to some
1643 * other interpreter. Similarly, if "perl" is there, but
1644 * not in the first 'word' of the line, we assume the line
1645 * contains the start of the Perl program.
1647 if (d && *s != '#') {
1649 while (*c && !strchr("; \t\r\n\f\v#", *c))
1652 d = Nullch; /* "perl" not in first word; ignore */
1654 *s = '#'; /* Don't try to parse shebang line */
1656 #endif /* ALTERNATE_SHEBANG */
1661 !instr(s,"indir") &&
1662 instr(origargv[0],"perl"))
1668 while (s < bufend && isSPACE(*s))
1671 Newz(899,newargv,origargc+3,char*);
1673 while (s < bufend && !isSPACE(*s))
1676 Copy(origargv+1, newargv+2, origargc+1, char*);
1681 execv(ipath, newargv);
1682 croak("Can't exec %s", ipath);
1685 U32 oldpdb = perldb;
1686 bool oldn = minus_n;
1687 bool oldp = minus_p;
1689 while (*d && !isSPACE(*d)) d++;
1690 while (*d == ' ' || *d == '\t') d++;
1694 if (*d == 'M' || *d == 'm') {
1696 while (*d && !isSPACE(*d)) d++;
1697 croak("Too late for \"-%.*s\" option",
1700 d = moreswitches(d);
1702 if (PERLDB_LINE && !oldpdb ||
1703 ( minus_n || minus_p ) && !(oldn || oldp) )
1704 /* if we have already added "LINE: while (<>) {",
1705 we must not do it again */
1707 sv_setpv(linestr, "");
1708 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1709 bufend = SvPVX(linestr) + SvCUR(linestr);
1712 (void)gv_fetchfile(origfilename);
1719 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1721 lex_state = LEX_FORMLINE;
1726 warn("Illegal character \\%03o (carriage return)", '\r');
1728 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1729 case ' ': case '\t': case '\f': case 013:
1734 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1736 while (s < d && *s != '\n')
1741 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1743 lex_state = LEX_FORMLINE;
1753 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1758 while (s < bufend && (*s == ' ' || *s == '\t'))
1761 if (strnEQ(s,"=>",2)) {
1763 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1764 (int)tmp, (int)tmp);
1765 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1766 OPERATOR('-'); /* unary minus */
1768 last_uni = oldbufptr;
1769 last_lop_op = OP_FTEREAD; /* good enough */
1771 case 'r': FTST(OP_FTEREAD);
1772 case 'w': FTST(OP_FTEWRITE);
1773 case 'x': FTST(OP_FTEEXEC);
1774 case 'o': FTST(OP_FTEOWNED);
1775 case 'R': FTST(OP_FTRREAD);
1776 case 'W': FTST(OP_FTRWRITE);
1777 case 'X': FTST(OP_FTREXEC);
1778 case 'O': FTST(OP_FTROWNED);
1779 case 'e': FTST(OP_FTIS);
1780 case 'z': FTST(OP_FTZERO);
1781 case 's': FTST(OP_FTSIZE);
1782 case 'f': FTST(OP_FTFILE);
1783 case 'd': FTST(OP_FTDIR);
1784 case 'l': FTST(OP_FTLINK);
1785 case 'p': FTST(OP_FTPIPE);
1786 case 'S': FTST(OP_FTSOCK);
1787 case 'u': FTST(OP_FTSUID);
1788 case 'g': FTST(OP_FTSGID);
1789 case 'k': FTST(OP_FTSVTX);
1790 case 'b': FTST(OP_FTBLK);
1791 case 'c': FTST(OP_FTCHR);
1792 case 't': FTST(OP_FTTTY);
1793 case 'T': FTST(OP_FTTEXT);
1794 case 'B': FTST(OP_FTBINARY);
1795 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1796 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1797 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1799 croak("Unrecognized file test: -%c", (int)tmp);
1806 if (expect == XOPERATOR)
1811 else if (*s == '>') {
1814 if (isIDFIRST(*s)) {
1815 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1823 if (expect == XOPERATOR)
1826 if (isSPACE(*s) || !isSPACE(*bufptr))
1828 OPERATOR('-'); /* unary minus */
1835 if (expect == XOPERATOR)
1840 if (expect == XOPERATOR)
1843 if (isSPACE(*s) || !isSPACE(*bufptr))
1849 if (expect != XOPERATOR) {
1850 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1852 force_ident(tokenbuf, '*');
1865 if (expect == XOPERATOR) {
1870 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1873 yyerror("Final % should be \\% or %name");
1876 pending_ident = '%';
1898 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1899 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1904 if (curcop->cop_line < copline)
1905 copline = curcop->cop_line;
1916 if (lex_brackets <= 0)
1917 yyerror("Unmatched right bracket");
1920 if (lex_state == LEX_INTERPNORMAL) {
1921 if (lex_brackets == 0) {
1922 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1923 lex_state = LEX_INTERPEND;
1930 if (lex_brackets > 100) {
1931 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1932 if (newlb != lex_brackstack) {
1934 lex_brackstack = newlb;
1939 if (lex_formbrack) {
1943 if (oldoldbufptr == last_lop)
1944 lex_brackstack[lex_brackets++] = XTERM;
1946 lex_brackstack[lex_brackets++] = XOPERATOR;
1947 OPERATOR(HASHBRACK);
1949 while (s < bufend && (*s == ' ' || *s == '\t'))
1953 if (d < bufend && *d == '-') {
1956 while (d < bufend && (*d == ' ' || *d == '\t'))
1959 if (d < bufend && isIDFIRST(*d)) {
1960 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
1962 while (d < bufend && (*d == ' ' || *d == '\t'))
1965 char minus = (tokenbuf[0] == '-');
1967 (keyword(tokenbuf + 1, len) ||
1968 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
1969 perl_get_cv(tokenbuf + 1, FALSE) ))
1970 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
1971 tokenbuf + !minus, tokenbuf + !minus);
1972 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
1979 lex_brackstack[lex_brackets++] = XSTATE;
1983 lex_brackstack[lex_brackets++] = XOPERATOR;
1988 if (oldoldbufptr == last_lop)
1989 lex_brackstack[lex_brackets++] = XTERM;
1991 lex_brackstack[lex_brackets++] = XOPERATOR;
1994 OPERATOR(HASHBRACK);
1995 /* This hack serves to disambiguate a pair of curlies
1996 * as being a block or an anon hash. Normally, expectation
1997 * determines that, but in cases where we're not in a
1998 * position to expect anything in particular (like inside
1999 * eval"") we have to resolve the ambiguity. This code
2000 * covers the case where the first term in the curlies is a
2001 * quoted string. Most other cases need to be explicitly
2002 * disambiguated by prepending a `+' before the opening
2003 * curly in order to force resolution as an anon hash.
2005 * XXX should probably propagate the outer expectation
2006 * into eval"" to rely less on this hack, but that could
2007 * potentially break current behavior of eval"".
2011 if (*s == '\'' || *s == '"' || *s == '`') {
2012 /* common case: get past first string, handling escapes */
2013 for (t++; t < bufend && *t != *s;)
2014 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2018 else if (*s == 'q') {
2021 || ((*t == 'q' || *t == 'x') && ++t < bufend
2022 && !isALNUM(*t)))) {
2024 char open, close, term;
2027 while (t < bufend && isSPACE(*t))
2031 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2035 for (t++; t < bufend; t++) {
2036 if (*t == '\\' && t+1 < bufend && open != '\\')
2038 else if (*t == open)
2042 for (t++; t < bufend; t++) {
2043 if (*t == '\\' && t+1 < bufend)
2045 else if (*t == close && --brackets <= 0)
2047 else if (*t == open)
2053 else if (isALPHA(*s)) {
2054 for (t++; t < bufend && isALNUM(*t); t++) ;
2056 while (t < bufend && isSPACE(*t))
2058 /* if comma follows first term, call it an anon hash */
2059 /* XXX it could be a comma expression with loop modifiers */
2060 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2061 || (*t == '=' && t[1] == '>')))
2062 OPERATOR(HASHBRACK);
2066 lex_brackstack[lex_brackets-1] = XSTATE;
2072 yylval.ival = curcop->cop_line;
2073 if (isSPACE(*s) || *s == '#')
2074 copline = NOLINE; /* invalidate current command line number */
2079 if (lex_brackets <= 0)
2080 yyerror("Unmatched right bracket");
2082 expect = (expectation)lex_brackstack[--lex_brackets];
2083 if (lex_brackets < lex_formbrack)
2085 if (lex_state == LEX_INTERPNORMAL) {
2086 if (lex_brackets == 0) {
2087 if (lex_fakebrack) {
2088 lex_state = LEX_INTERPEND;
2090 return yylex(); /* ignore fake brackets */
2092 if (*s == '-' && s[1] == '>')
2093 lex_state = LEX_INTERPENDMAYBE;
2094 else if (*s != '[' && *s != '{')
2095 lex_state = LEX_INTERPEND;
2098 if (lex_brackets < lex_fakebrack) {
2101 return yylex(); /* ignore fake brackets */
2111 if (expect == XOPERATOR) {
2112 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2120 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2123 force_ident(tokenbuf, '&');
2127 yylval.ival = (OPpENTERSUB_AMPER<<8);
2146 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2147 warn("Reversed %c= operator",(int)tmp);
2149 if (expect == XSTATE && isALPHA(tmp) &&
2150 (s == linestart+1 || s[-2] == '\n') )
2152 if (in_eval && !rsfp) {
2157 if (strnEQ(s,"=cut",4)) {
2174 if (lex_brackets < lex_formbrack) {
2176 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2177 if (*t == '\n' || *t == '#') {
2195 if (expect != XOPERATOR) {
2196 if (s[1] != '<' && !strchr(s,'>'))
2199 s = scan_heredoc(s);
2201 s = scan_inputsymbol(s);
2202 TERM(sublex_start());
2207 SHop(OP_LEFT_SHIFT);
2221 SHop(OP_RIGHT_SHIFT);
2230 if (expect == XOPERATOR) {
2231 if (lex_formbrack && lex_brackets == lex_formbrack) {
2234 return ','; /* grandfather non-comma-format format */
2238 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2239 if (expect == XOPERATOR)
2240 no_op("Array length", bufptr);
2242 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2247 pending_ident = '#';
2251 if (expect == XOPERATOR)
2252 no_op("Scalar", bufptr);
2254 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2257 yyerror("Final $ should be \\$ or $name");
2261 /* This kludge not intended to be bulletproof. */
2262 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2263 yylval.opval = newSVOP(OP_CONST, 0,
2264 newSViv((IV)compiling.cop_arybase));
2265 yylval.opval->op_private = OPpCONST_ARYBASE;
2270 if (lex_state == LEX_NORMAL)
2273 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2279 isSPACE(*t) || isALNUM(*t) || *t == '$';
2282 bufptr = skipspace(bufptr);
2283 while (t < bufend && *t != ']')
2285 warn("Multidimensional syntax %.*s not supported",
2286 (t - bufptr) + 1, bufptr);
2290 else if (*s == '{') {
2292 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2293 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2295 char tmpbuf[sizeof tokenbuf];
2297 for (t++; isSPACE(*t); t++) ;
2298 if (isIDFIRST(*t)) {
2299 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2300 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2301 warn("You need to quote \"%s\"", tmpbuf);
2308 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2309 bool islop = (last_lop == oldoldbufptr);
2310 if (!islop || last_lop_op == OP_GREPSTART)
2312 else if (strchr("$@\"'`q", *s))
2313 expect = XTERM; /* e.g. print $fh "foo" */
2314 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2315 expect = XTERM; /* e.g. print $fh &sub */
2316 else if (isIDFIRST(*s)) {
2317 char tmpbuf[sizeof tokenbuf];
2318 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2319 if (tmp = keyword(tmpbuf, len)) {
2320 /* binary operators exclude handle interpretations */
2332 expect = XTERM; /* e.g. print $fh length() */
2337 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2338 if (gv && GvCVu(gv))
2339 expect = XTERM; /* e.g. print $fh subr() */
2342 else if (isDIGIT(*s))
2343 expect = XTERM; /* e.g. print $fh 3 */
2344 else if (*s == '.' && isDIGIT(s[1]))
2345 expect = XTERM; /* e.g. print $fh .3 */
2346 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2347 expect = XTERM; /* e.g. print $fh -1 */
2348 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2349 expect = XTERM; /* print $fh <<"EOF" */
2351 pending_ident = '$';
2355 if (expect == XOPERATOR)
2358 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2361 yyerror("Final @ should be \\@ or @name");
2364 if (lex_state == LEX_NORMAL)
2366 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2370 /* Warn about @ where they meant $. */
2372 if (*s == '[' || *s == '{') {
2374 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2376 if (*t == '}' || *t == ']') {
2378 bufptr = skipspace(bufptr);
2379 warn("Scalar value %.*s better written as $%.*s",
2380 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2385 pending_ident = '@';
2388 case '/': /* may either be division or pattern */
2389 case '?': /* may either be conditional or pattern */
2390 if (expect != XOPERATOR) {
2391 /* Disable warning on "study /blah/" */
2392 if (oldoldbufptr == last_uni
2393 && (*last_uni != 's' || s - last_uni < 5
2394 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2397 TERM(sublex_start());
2405 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2406 (s == linestart || s[-1] == '\n') ) {
2411 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2417 yylval.ival = OPf_SPECIAL;
2423 if (expect != XOPERATOR)
2428 case '0': case '1': case '2': case '3': case '4':
2429 case '5': case '6': case '7': case '8': case '9':
2431 if (expect == XOPERATOR)
2437 if (expect == XOPERATOR) {
2438 if (lex_formbrack && lex_brackets == lex_formbrack) {
2441 return ','; /* grandfather non-comma-format format */
2447 missingterm((char*)0);
2448 yylval.ival = OP_CONST;
2449 TERM(sublex_start());
2453 if (expect == XOPERATOR) {
2454 if (lex_formbrack && lex_brackets == lex_formbrack) {
2457 return ','; /* grandfather non-comma-format format */
2463 missingterm((char*)0);
2464 yylval.ival = OP_CONST;
2465 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2466 if (*d == '$' || *d == '@' || *d == '\\') {
2467 yylval.ival = OP_STRINGIFY;
2471 TERM(sublex_start());
2475 if (expect == XOPERATOR)
2476 no_op("Backticks",s);
2478 missingterm((char*)0);
2479 yylval.ival = OP_BACKTICK;
2481 TERM(sublex_start());
2485 if (dowarn && lex_inwhat && isDIGIT(*s))
2486 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2487 if (expect == XOPERATOR)
2488 no_op("Backslash",s);
2492 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2531 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2533 /* Some keywords can be followed by any delimiter, including ':' */
2534 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2535 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2536 (tokenbuf[0] == 'q' &&
2537 strchr("qwx", tokenbuf[1]))));
2539 /* x::* is just a word, unless x is "CORE" */
2540 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2544 while (d < bufend && isSPACE(*d))
2545 d++; /* no comments skipped here, or s### is misparsed */
2547 /* Is this a label? */
2548 if (!tmp && expect == XSTATE
2549 && d < bufend && *d == ':' && *(d + 1) != ':') {
2551 yylval.pval = savepv(tokenbuf);
2556 /* Check for keywords */
2557 tmp = keyword(tokenbuf, len);
2559 /* Is this a word before a => operator? */
2560 if (strnEQ(d,"=>",2)) {
2562 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2563 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2564 tokenbuf, tokenbuf);
2565 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2566 yylval.opval->op_private = OPpCONST_BARE;
2570 if (tmp < 0) { /* second-class keyword? */
2571 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2572 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2573 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2574 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2575 (gv = *gvp) != (GV*)&sv_undef &&
2576 GvCVu(gv) && GvIMPORTED_CV(gv))))
2578 tmp = 0; /* overridden by importation */
2581 && -tmp==KEY_lock /* XXX generalizable kludge */
2582 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2584 tmp = 0; /* any sub overrides "weak" keyword */
2587 tmp = -tmp; gv = Nullgv; gvp = 0;
2594 default: /* not a keyword */
2597 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2599 /* Get the rest if it looks like a package qualifier */
2601 if (*s == '\'' || *s == ':' && s[1] == ':') {
2602 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2605 croak("Bad name after %s::", tokenbuf);
2608 if (expect == XOPERATOR) {
2609 if (bufptr == linestart) {
2615 no_op("Bareword",s);
2618 /* Look for a subroutine with this name in current package. */
2621 sv = newSVpv("CORE::GLOBAL::",14);
2622 sv_catpv(sv,tokenbuf);
2625 sv = newSVpv(tokenbuf,0);
2627 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2629 /* Presume this is going to be a bareword of some sort. */
2632 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2633 yylval.opval->op_private = OPpCONST_BARE;
2635 /* See if it's the indirect object for a list operator. */
2638 oldoldbufptr < bufptr &&
2639 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2640 /* NO SKIPSPACE BEFORE HERE! */
2642 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2644 bool immediate_paren = *s == '(';
2646 /* (Now we can afford to cross potential line boundary.) */
2649 /* Two barewords in a row may indicate method call. */
2651 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2654 /* If not a declared subroutine, it's an indirect object. */
2655 /* (But it's an indir obj regardless for sort.) */
2657 if ((last_lop_op == OP_SORT ||
2658 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2659 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2660 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2665 /* If followed by a paren, it's certainly a subroutine. */
2671 if (gv && GvCVu(gv)) {
2672 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2673 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2678 nextval[nexttoke].opval = yylval.opval;
2685 /* If followed by var or block, call it a method (unless sub) */
2687 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2688 last_lop = oldbufptr;
2689 last_lop_op = OP_METHOD;
2693 /* If followed by a bareword, see if it looks like indir obj. */
2695 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2698 /* Not a method, so call it a subroutine (if defined) */
2700 if (gv && GvCVu(gv)) {
2702 if (lastchar == '-')
2703 warn("Ambiguous use of -%s resolved as -&%s()",
2704 tokenbuf, tokenbuf);
2705 last_lop = oldbufptr;
2706 last_lop_op = OP_ENTERSUB;
2707 /* Check for a constant sub */
2709 if ((sv = cv_const_sv(cv))) {
2711 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2712 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2713 yylval.opval->op_private = 0;
2717 /* Resolve to GV now. */
2718 op_free(yylval.opval);
2719 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2720 /* Is there a prototype? */
2723 char *proto = SvPV((SV*)cv, len);
2726 if (strEQ(proto, "$"))
2728 if (*proto == '&' && *s == '{') {
2729 sv_setpv(subname,"__ANON__");
2733 nextval[nexttoke].opval = yylval.opval;
2739 if (hints & HINT_STRICT_SUBS &&
2742 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2743 last_lop_op != OP_ACCEPT &&
2744 last_lop_op != OP_PIPE_OP &&
2745 last_lop_op != OP_SOCKPAIR)
2748 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2753 /* Call it a bare word */
2757 if (lastchar != '-') {
2758 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2760 warn(warn_reserved, tokenbuf);
2763 if (lastchar && strchr("*%&", lastchar)) {
2764 warn("Operator or semicolon missing before %c%s",
2765 lastchar, tokenbuf);
2766 warn("Ambiguous use of %c resolved as operator %c",
2767 lastchar, lastchar);
2773 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2774 newSVsv(GvSV(curcop->cop_filegv)));
2778 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2779 newSVpvf("%ld", (long)curcop->cop_line));
2782 case KEY___PACKAGE__:
2783 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2785 ? newSVsv(curstname)
2794 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2795 char *pname = "main";
2796 if (tokenbuf[2] == 'D')
2797 pname = HvNAME(curstash ? curstash : defstash);
2798 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2801 GvIOp(gv) = newIO();
2802 IoIFP(GvIOp(gv)) = rsfp;
2803 #if defined(HAS_FCNTL) && defined(F_SETFD)
2805 int fd = PerlIO_fileno(rsfp);
2806 fcntl(fd,F_SETFD,fd >= 3);
2809 /* Mark this internal pseudo-handle as clean */
2810 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2812 IoTYPE(GvIOp(gv)) = '|';
2813 else if ((PerlIO*)rsfp == PerlIO_stdin())
2814 IoTYPE(GvIOp(gv)) = '-';
2816 IoTYPE(GvIOp(gv)) = '<';
2827 if (expect == XSTATE) {
2834 if (*s == ':' && s[1] == ':') {
2837 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2838 tmp = keyword(tokenbuf, len);
2852 LOP(OP_ACCEPT,XTERM);
2858 LOP(OP_ATAN2,XTERM);
2867 LOP(OP_BLESS,XTERM);
2876 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2896 LOP(OP_CRYPT,XTERM);
2900 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2901 if (*d != '0' && isDIGIT(*d))
2902 yywarn("chmod: mode argument is missing initial 0");
2904 LOP(OP_CHMOD,XTERM);
2907 LOP(OP_CHOWN,XTERM);
2910 LOP(OP_CONNECT,XTERM);
2926 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2930 hints |= HINT_BLOCK_SCOPE;
2940 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2941 LOP(OP_DBMOPEN,XTERM);
2947 s = force_word(s,WORD,TRUE,FALSE,FALSE);
2954 yylval.ival = curcop->cop_line;
2968 expect = (*s == '{') ? XTERMBLOCK : XTERM;
2969 UNIBRACK(OP_ENTEREVAL);
2984 case KEY_endhostent:
2990 case KEY_endservent:
2993 case KEY_endprotoent:
3004 yylval.ival = curcop->cop_line;
3006 if (isIDFIRST(*s)) {
3008 if ((bufend - p) >= 3 &&
3009 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3013 croak("Missing $ on loop variable");
3018 LOP(OP_FORMLINE,XTERM);
3024 LOP(OP_FCNTL,XTERM);
3030 LOP(OP_FLOCK,XTERM);
3039 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3042 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3057 case KEY_getpriority:
3058 LOP(OP_GETPRIORITY,XTERM);
3060 case KEY_getprotobyname:
3063 case KEY_getprotobynumber:
3064 LOP(OP_GPBYNUMBER,XTERM);
3066 case KEY_getprotoent:
3078 case KEY_getpeername:
3079 UNI(OP_GETPEERNAME);
3081 case KEY_gethostbyname:
3084 case KEY_gethostbyaddr:
3085 LOP(OP_GHBYADDR,XTERM);
3087 case KEY_gethostent:
3090 case KEY_getnetbyname:
3093 case KEY_getnetbyaddr:
3094 LOP(OP_GNBYADDR,XTERM);
3099 case KEY_getservbyname:
3100 LOP(OP_GSBYNAME,XTERM);
3102 case KEY_getservbyport:
3103 LOP(OP_GSBYPORT,XTERM);
3105 case KEY_getservent:
3108 case KEY_getsockname:
3109 UNI(OP_GETSOCKNAME);
3111 case KEY_getsockopt:
3112 LOP(OP_GSOCKOPT,XTERM);
3134 yylval.ival = curcop->cop_line;
3138 LOP(OP_INDEX,XTERM);
3144 LOP(OP_IOCTL,XTERM);
3156 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3187 LOP(OP_LISTEN,XTERM);
3197 TERM(sublex_start());
3200 LOP(OP_MAPSTART,XREF);
3203 LOP(OP_MKDIR,XTERM);
3206 LOP(OP_MSGCTL,XTERM);
3209 LOP(OP_MSGGET,XTERM);
3212 LOP(OP_MSGRCV,XTERM);
3215 LOP(OP_MSGSND,XTERM);
3220 if (isIDFIRST(*s)) {
3221 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3222 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3226 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3233 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3240 if (expect != XSTATE)
3241 yyerror("\"no\" not allowed in expression");
3242 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3243 s = force_version(s);
3252 if (isIDFIRST(*s)) {
3254 for (d = s; isALNUM(*d); d++) ;
3256 if (strchr("|&*+-=!?:.", *t))
3257 warn("Precedence problem: open %.*s should be open(%.*s)",
3263 yylval.ival = OP_OR;
3273 LOP(OP_OPEN_DIR,XTERM);
3276 checkcomma(s,tokenbuf,"filehandle");
3280 checkcomma(s,tokenbuf,"filehandle");
3299 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3303 LOP(OP_PIPE_OP,XTERM);
3308 missingterm((char*)0);
3309 yylval.ival = OP_CONST;
3310 TERM(sublex_start());
3318 missingterm((char*)0);
3319 if (dowarn && SvLEN(lex_stuff)) {
3320 d = SvPV_force(lex_stuff, len);
3321 for (; len; --len, ++d) {
3323 warn("Possible attempt to separate words with commas");
3327 warn("Possible attempt to put comments in qw() list");
3333 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3337 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3340 yylval.ival = OP_SPLIT;
3344 last_lop = oldbufptr;
3345 last_lop_op = OP_SPLIT;
3351 missingterm((char*)0);
3352 yylval.ival = OP_STRINGIFY;
3353 if (SvIVX(lex_stuff) == '\'')
3354 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3355 TERM(sublex_start());
3360 missingterm((char*)0);
3361 yylval.ival = OP_BACKTICK;
3363 TERM(sublex_start());
3370 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3371 if (isIDFIRST(*tokenbuf))
3372 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3374 yyerror("<> should be quotes");
3381 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3385 LOP(OP_RENAME,XTERM);
3394 LOP(OP_RINDEX,XTERM);
3417 LOP(OP_REVERSE,XTERM);
3428 TERM(sublex_start());
3430 TOKEN(1); /* force error */
3439 LOP(OP_SELECT,XTERM);
3445 LOP(OP_SEMCTL,XTERM);
3448 LOP(OP_SEMGET,XTERM);
3451 LOP(OP_SEMOP,XTERM);
3457 LOP(OP_SETPGRP,XTERM);
3459 case KEY_setpriority:
3460 LOP(OP_SETPRIORITY,XTERM);
3462 case KEY_sethostent:
3468 case KEY_setservent:
3471 case KEY_setprotoent:
3481 LOP(OP_SEEKDIR,XTERM);
3483 case KEY_setsockopt:
3484 LOP(OP_SSOCKOPT,XTERM);
3490 LOP(OP_SHMCTL,XTERM);
3493 LOP(OP_SHMGET,XTERM);
3496 LOP(OP_SHMREAD,XTERM);
3499 LOP(OP_SHMWRITE,XTERM);
3502 LOP(OP_SHUTDOWN,XTERM);
3511 LOP(OP_SOCKET,XTERM);
3513 case KEY_socketpair:
3514 LOP(OP_SOCKPAIR,XTERM);
3517 checkcomma(s,tokenbuf,"subroutine name");
3519 if (*s == ';' || *s == ')') /* probably a close */
3520 croak("sort is now a reserved word");
3522 s = force_word(s,WORD,TRUE,TRUE,TRUE);
3526 LOP(OP_SPLIT,XTERM);
3529 LOP(OP_SPRINTF,XTERM);
3532 LOP(OP_SPLICE,XTERM);
3548 LOP(OP_SUBSTR,XTERM);
3555 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3556 char tmpbuf[sizeof tokenbuf];
3558 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3559 if (strchr(tmpbuf, ':'))
3560 sv_setpv(subname, tmpbuf);
3562 sv_setsv(subname,curstname);
3563 sv_catpvn(subname,"::",2);
3564 sv_catpvn(subname,tmpbuf,len);
3566 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3570 expect = XTERMBLOCK;
3571 sv_setpv(subname,"?");
3574 if (tmp == KEY_format) {
3577 lex_formbrack = lex_brackets + 1;
3581 /* Look for a prototype */
3588 SvREFCNT_dec(lex_stuff);
3590 croak("Prototype not terminated");
3593 d = SvPVX(lex_stuff);
3595 for (p = d; *p; ++p) {
3600 SvCUR(lex_stuff) = tmp;
3603 nextval[1] = nextval[0];
3604 nexttype[1] = nexttype[0];
3605 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3606 nexttype[0] = THING;
3607 if (nexttoke == 1) {
3608 lex_defer = lex_state;
3609 lex_expect = expect;
3610 lex_state = LEX_KNOWNEXT;
3615 if (*SvPV(subname,na) == '?') {
3616 sv_setpv(subname,"__ANON__");
3623 LOP(OP_SYSTEM,XREF);
3626 LOP(OP_SYMLINK,XTERM);
3629 LOP(OP_SYSCALL,XTERM);
3632 LOP(OP_SYSOPEN,XTERM);
3635 LOP(OP_SYSSEEK,XTERM);
3638 LOP(OP_SYSREAD,XTERM);
3641 LOP(OP_SYSWRITE,XTERM);
3645 TERM(sublex_start());
3666 LOP(OP_TRUNCATE,XTERM);
3678 yylval.ival = curcop->cop_line;
3682 yylval.ival = curcop->cop_line;
3686 LOP(OP_UNLINK,XTERM);
3692 LOP(OP_UNPACK,XTERM);
3695 LOP(OP_UTIME,XTERM);
3699 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3700 if (*d != '0' && isDIGIT(*d))
3701 yywarn("umask: argument is missing initial 0");
3706 LOP(OP_UNSHIFT,XTERM);
3709 if (expect != XSTATE)
3710 yyerror("\"use\" not allowed in expression");
3713 s = force_version(s);
3714 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3715 nextval[nexttoke].opval = Nullop;
3720 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3721 s = force_version(s);
3734 yylval.ival = curcop->cop_line;
3738 hints |= HINT_BLOCK_SCOPE;
3745 LOP(OP_WAITPID,XTERM);
3751 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3755 if (expect == XOPERATOR)
3761 yylval.ival = OP_XOR;
3766 TERM(sublex_start());
3772 keyword(register char *d, I32 len)
3777 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3778 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3779 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3780 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3781 if (strEQ(d,"__END__")) return KEY___END__;
3785 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3790 if (strEQ(d,"and")) return -KEY_and;
3791 if (strEQ(d,"abs")) return -KEY_abs;
3794 if (strEQ(d,"alarm")) return -KEY_alarm;
3795 if (strEQ(d,"atan2")) return -KEY_atan2;
3798 if (strEQ(d,"accept")) return -KEY_accept;
3803 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3806 if (strEQ(d,"bless")) return -KEY_bless;
3807 if (strEQ(d,"bind")) return -KEY_bind;
3808 if (strEQ(d,"binmode")) return -KEY_binmode;
3811 if (strEQ(d,"CORE")) return -KEY_CORE;
3816 if (strEQ(d,"cmp")) return -KEY_cmp;
3817 if (strEQ(d,"chr")) return -KEY_chr;
3818 if (strEQ(d,"cos")) return -KEY_cos;
3821 if (strEQ(d,"chop")) return KEY_chop;
3824 if (strEQ(d,"close")) return -KEY_close;
3825 if (strEQ(d,"chdir")) return -KEY_chdir;
3826 if (strEQ(d,"chomp")) return KEY_chomp;
3827 if (strEQ(d,"chmod")) return -KEY_chmod;
3828 if (strEQ(d,"chown")) return -KEY_chown;
3829 if (strEQ(d,"crypt")) return -KEY_crypt;
3832 if (strEQ(d,"chroot")) return -KEY_chroot;
3833 if (strEQ(d,"caller")) return -KEY_caller;
3836 if (strEQ(d,"connect")) return -KEY_connect;
3839 if (strEQ(d,"closedir")) return -KEY_closedir;
3840 if (strEQ(d,"continue")) return -KEY_continue;
3845 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3850 if (strEQ(d,"do")) return KEY_do;
3853 if (strEQ(d,"die")) return -KEY_die;
3856 if (strEQ(d,"dump")) return -KEY_dump;
3859 if (strEQ(d,"delete")) return KEY_delete;
3862 if (strEQ(d,"defined")) return KEY_defined;
3863 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3866 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3871 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3872 if (strEQ(d,"END")) return KEY_END;
3877 if (strEQ(d,"eq")) return -KEY_eq;
3880 if (strEQ(d,"eof")) return -KEY_eof;
3881 if (strEQ(d,"exp")) return -KEY_exp;
3884 if (strEQ(d,"else")) return KEY_else;
3885 if (strEQ(d,"exit")) return -KEY_exit;
3886 if (strEQ(d,"eval")) return KEY_eval;
3887 if (strEQ(d,"exec")) return -KEY_exec;
3888 if (strEQ(d,"each")) return KEY_each;
3891 if (strEQ(d,"elsif")) return KEY_elsif;
3894 if (strEQ(d,"exists")) return KEY_exists;
3895 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3898 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3899 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3902 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3905 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3906 if (strEQ(d,"endservent")) return -KEY_endservent;
3909 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3916 if (strEQ(d,"for")) return KEY_for;
3919 if (strEQ(d,"fork")) return -KEY_fork;
3922 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3923 if (strEQ(d,"flock")) return -KEY_flock;
3926 if (strEQ(d,"format")) return KEY_format;
3927 if (strEQ(d,"fileno")) return -KEY_fileno;
3930 if (strEQ(d,"foreach")) return KEY_foreach;
3933 if (strEQ(d,"formline")) return -KEY_formline;
3939 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3940 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
3944 if (strnEQ(d,"get",3)) {
3949 if (strEQ(d,"ppid")) return -KEY_getppid;
3950 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
3953 if (strEQ(d,"pwent")) return -KEY_getpwent;
3954 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
3955 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
3958 if (strEQ(d,"peername")) return -KEY_getpeername;
3959 if (strEQ(d,"protoent")) return -KEY_getprotoent;
3960 if (strEQ(d,"priority")) return -KEY_getpriority;
3963 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
3966 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
3970 else if (*d == 'h') {
3971 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
3972 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
3973 if (strEQ(d,"hostent")) return -KEY_gethostent;
3975 else if (*d == 'n') {
3976 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
3977 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
3978 if (strEQ(d,"netent")) return -KEY_getnetent;
3980 else if (*d == 's') {
3981 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
3982 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
3983 if (strEQ(d,"servent")) return -KEY_getservent;
3984 if (strEQ(d,"sockname")) return -KEY_getsockname;
3985 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
3987 else if (*d == 'g') {
3988 if (strEQ(d,"grent")) return -KEY_getgrent;
3989 if (strEQ(d,"grnam")) return -KEY_getgrnam;
3990 if (strEQ(d,"grgid")) return -KEY_getgrgid;
3992 else if (*d == 'l') {
3993 if (strEQ(d,"login")) return -KEY_getlogin;
3995 else if (strEQ(d,"c")) return -KEY_getc;
4000 if (strEQ(d,"gt")) return -KEY_gt;
4001 if (strEQ(d,"ge")) return -KEY_ge;
4004 if (strEQ(d,"grep")) return KEY_grep;
4005 if (strEQ(d,"goto")) return KEY_goto;
4006 if (strEQ(d,"glob")) return KEY_glob;
4009 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4014 if (strEQ(d,"hex")) return -KEY_hex;
4017 if (strEQ(d,"INIT")) return KEY_INIT;
4022 if (strEQ(d,"if")) return KEY_if;
4025 if (strEQ(d,"int")) return -KEY_int;
4028 if (strEQ(d,"index")) return -KEY_index;
4029 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4034 if (strEQ(d,"join")) return -KEY_join;
4038 if (strEQ(d,"keys")) return KEY_keys;
4039 if (strEQ(d,"kill")) return -KEY_kill;
4044 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4045 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4051 if (strEQ(d,"lt")) return -KEY_lt;
4052 if (strEQ(d,"le")) return -KEY_le;
4053 if (strEQ(d,"lc")) return -KEY_lc;
4056 if (strEQ(d,"log")) return -KEY_log;
4059 if (strEQ(d,"last")) return KEY_last;
4060 if (strEQ(d,"link")) return -KEY_link;
4061 if (strEQ(d,"lock")) return -KEY_lock;
4064 if (strEQ(d,"local")) return KEY_local;
4065 if (strEQ(d,"lstat")) return -KEY_lstat;
4068 if (strEQ(d,"length")) return -KEY_length;
4069 if (strEQ(d,"listen")) return -KEY_listen;
4072 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4075 if (strEQ(d,"localtime")) return -KEY_localtime;
4081 case 1: return KEY_m;
4083 if (strEQ(d,"my")) return KEY_my;
4086 if (strEQ(d,"map")) return KEY_map;
4089 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4092 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4093 if (strEQ(d,"msgget")) return -KEY_msgget;
4094 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4095 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4100 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4103 if (strEQ(d,"next")) return KEY_next;
4104 if (strEQ(d,"ne")) return -KEY_ne;
4105 if (strEQ(d,"not")) return -KEY_not;
4106 if (strEQ(d,"no")) return KEY_no;
4111 if (strEQ(d,"or")) return -KEY_or;
4114 if (strEQ(d,"ord")) return -KEY_ord;
4115 if (strEQ(d,"oct")) return -KEY_oct;
4118 if (strEQ(d,"open")) return -KEY_open;
4121 if (strEQ(d,"opendir")) return -KEY_opendir;
4128 if (strEQ(d,"pop")) return KEY_pop;
4129 if (strEQ(d,"pos")) return KEY_pos;
4132 if (strEQ(d,"push")) return KEY_push;
4133 if (strEQ(d,"pack")) return -KEY_pack;
4134 if (strEQ(d,"pipe")) return -KEY_pipe;
4137 if (strEQ(d,"print")) return KEY_print;
4140 if (strEQ(d,"printf")) return KEY_printf;
4143 if (strEQ(d,"package")) return KEY_package;
4146 if (strEQ(d,"prototype")) return KEY_prototype;
4151 if (strEQ(d,"q")) return KEY_q;
4152 if (strEQ(d,"qq")) return KEY_qq;
4153 if (strEQ(d,"qw")) return KEY_qw;
4154 if (strEQ(d,"qx")) return KEY_qx;
4156 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4161 if (strEQ(d,"ref")) return -KEY_ref;
4164 if (strEQ(d,"read")) return -KEY_read;
4165 if (strEQ(d,"rand")) return -KEY_rand;
4166 if (strEQ(d,"recv")) return -KEY_recv;
4167 if (strEQ(d,"redo")) return KEY_redo;
4170 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4171 if (strEQ(d,"reset")) return -KEY_reset;
4174 if (strEQ(d,"return")) return KEY_return;
4175 if (strEQ(d,"rename")) return -KEY_rename;
4176 if (strEQ(d,"rindex")) return -KEY_rindex;
4179 if (strEQ(d,"require")) return -KEY_require;
4180 if (strEQ(d,"reverse")) return -KEY_reverse;
4181 if (strEQ(d,"readdir")) return -KEY_readdir;
4184 if (strEQ(d,"readlink")) return -KEY_readlink;
4185 if (strEQ(d,"readline")) return -KEY_readline;
4186 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4189 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4195 case 0: return KEY_s;
4197 if (strEQ(d,"scalar")) return KEY_scalar;
4202 if (strEQ(d,"seek")) return -KEY_seek;
4203 if (strEQ(d,"send")) return -KEY_send;
4206 if (strEQ(d,"semop")) return -KEY_semop;
4209 if (strEQ(d,"select")) return -KEY_select;
4210 if (strEQ(d,"semctl")) return -KEY_semctl;
4211 if (strEQ(d,"semget")) return -KEY_semget;
4214 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4215 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4218 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4219 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4222 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4225 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4226 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4227 if (strEQ(d,"setservent")) return -KEY_setservent;
4230 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4231 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4238 if (strEQ(d,"shift")) return KEY_shift;
4241 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4242 if (strEQ(d,"shmget")) return -KEY_shmget;
4245 if (strEQ(d,"shmread")) return -KEY_shmread;
4248 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4249 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4254 if (strEQ(d,"sin")) return -KEY_sin;
4257 if (strEQ(d,"sleep")) return -KEY_sleep;
4260 if (strEQ(d,"sort")) return KEY_sort;
4261 if (strEQ(d,"socket")) return -KEY_socket;
4262 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4265 if (strEQ(d,"split")) return KEY_split;
4266 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4267 if (strEQ(d,"splice")) return KEY_splice;
4270 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4273 if (strEQ(d,"srand")) return -KEY_srand;
4276 if (strEQ(d,"stat")) return -KEY_stat;
4277 if (strEQ(d,"study")) return KEY_study;
4280 if (strEQ(d,"substr")) return -KEY_substr;
4281 if (strEQ(d,"sub")) return KEY_sub;
4286 if (strEQ(d,"system")) return -KEY_system;
4289 if (strEQ(d,"symlink")) return -KEY_symlink;
4290 if (strEQ(d,"syscall")) return -KEY_syscall;
4291 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4292 if (strEQ(d,"sysread")) return -KEY_sysread;
4293 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4296 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4305 if (strEQ(d,"tr")) return KEY_tr;
4308 if (strEQ(d,"tie")) return KEY_tie;
4311 if (strEQ(d,"tell")) return -KEY_tell;
4312 if (strEQ(d,"tied")) return KEY_tied;
4313 if (strEQ(d,"time")) return -KEY_time;
4316 if (strEQ(d,"times")) return -KEY_times;
4319 if (strEQ(d,"telldir")) return -KEY_telldir;
4322 if (strEQ(d,"truncate")) return -KEY_truncate;
4329 if (strEQ(d,"uc")) return -KEY_uc;
4332 if (strEQ(d,"use")) return KEY_use;
4335 if (strEQ(d,"undef")) return KEY_undef;
4336 if (strEQ(d,"until")) return KEY_until;
4337 if (strEQ(d,"untie")) return KEY_untie;
4338 if (strEQ(d,"utime")) return -KEY_utime;
4339 if (strEQ(d,"umask")) return -KEY_umask;
4342 if (strEQ(d,"unless")) return KEY_unless;
4343 if (strEQ(d,"unpack")) return -KEY_unpack;
4344 if (strEQ(d,"unlink")) return -KEY_unlink;
4347 if (strEQ(d,"unshift")) return KEY_unshift;
4348 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4353 if (strEQ(d,"values")) return -KEY_values;
4354 if (strEQ(d,"vec")) return -KEY_vec;
4359 if (strEQ(d,"warn")) return -KEY_warn;
4360 if (strEQ(d,"wait")) return -KEY_wait;
4363 if (strEQ(d,"while")) return KEY_while;
4364 if (strEQ(d,"write")) return -KEY_write;
4367 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4370 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4375 if (len == 1) return -KEY_x;
4376 if (strEQ(d,"xor")) return -KEY_xor;
4379 if (len == 1) return KEY_y;
4388 checkcomma(register char *s, char *name, char *what)
4392 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4394 for (w = s+2; *w && level; w++) {
4401 for (; *w && isSPACE(*w); w++) ;
4402 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4403 warn("%s (...) interpreted as function",name);
4405 while (s < bufend && isSPACE(*s))
4409 while (s < bufend && isSPACE(*s))
4411 if (isIDFIRST(*s)) {
4415 while (s < bufend && isSPACE(*s))
4420 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4424 croak("No comma allowed after %s", what);
4430 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4432 register char *d = dest;
4433 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4436 croak(ident_too_long);
4439 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4444 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4457 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4464 if (lex_brackets == 0)
4469 e = d + destlen - 3; /* two-character token, ending NUL */
4471 while (isDIGIT(*s)) {
4473 croak(ident_too_long);
4480 croak(ident_too_long);
4483 else if (*s == '\'' && isIDFIRST(s[1])) {
4488 else if (*s == ':' && s[1] == ':') {
4499 if (lex_state != LEX_NORMAL)
4500 lex_state = LEX_INTERPENDMAYBE;
4503 if (*s == '$' && s[1] &&
4504 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4506 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4507 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4520 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4525 if (isSPACE(s[-1])) {
4528 if (ch != ' ' && ch != '\t') {
4534 if (isIDFIRST(*d)) {
4536 while (isALNUM(*s) || *s == ':')
4539 while (s < send && (*s == ' ' || *s == '\t')) s++;
4540 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4541 if (dowarn && keyword(dest, d - dest)) {
4542 char *brack = *s == '[' ? "[...]" : "{...}";
4543 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4544 funny, dest, brack, funny, dest, brack);
4546 lex_fakebrack = lex_brackets+1;
4548 lex_brackstack[lex_brackets++] = XOPERATOR;
4554 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4555 lex_state = LEX_INTERPEND;
4558 if (dowarn && lex_state == LEX_NORMAL &&
4559 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4560 warn("Ambiguous use of %c{%s} resolved to %c%s",
4561 funny, dest, funny, dest);
4564 s = bracket; /* let the parser handle it */
4568 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4569 lex_state = LEX_INTERPEND;
4573 void pmflag(U16 *pmfl, int ch)
4578 *pmfl |= PMf_GLOBAL;
4580 *pmfl |= PMf_CONTINUE;
4584 *pmfl |= PMf_MULTILINE;
4586 *pmfl |= PMf_SINGLELINE;
4588 *pmfl |= PMf_EXTENDED;
4592 scan_pat(char *start)
4597 s = scan_str(start);
4600 SvREFCNT_dec(lex_stuff);
4602 croak("Search pattern not terminated");
4605 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4606 if (multi_open == '?')
4607 pm->op_pmflags |= PMf_ONCE;
4608 while (*s && strchr("iogcmsx", *s))
4609 pmflag(&pm->op_pmflags,*s++);
4610 pm->op_pmpermflags = pm->op_pmflags;
4613 yylval.ival = OP_MATCH;
4618 scan_subst(char *start)
4625 yylval.ival = OP_NULL;
4627 s = scan_str(start);
4631 SvREFCNT_dec(lex_stuff);
4633 croak("Substitution pattern not terminated");
4636 if (s[-1] == multi_open)
4639 first_start = multi_start;
4643 SvREFCNT_dec(lex_stuff);
4646 SvREFCNT_dec(lex_repl);
4648 croak("Substitution replacement not terminated");
4650 multi_start = first_start; /* so whole substitution is taken together */
4652 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4653 while (*s && strchr("iogcmsex", *s)) {
4659 pmflag(&pm->op_pmflags,*s++);
4664 pm->op_pmflags |= PMf_EVAL;
4665 repl = newSVpv("",0);
4667 sv_catpv(repl, es ? "eval " : "do ");
4668 sv_catpvn(repl, "{ ", 2);
4669 sv_catsv(repl, lex_repl);
4670 sv_catpvn(repl, " };", 2);
4671 SvCOMPILED_on(repl);
4672 SvREFCNT_dec(lex_repl);
4676 pm->op_pmpermflags = pm->op_pmflags;
4678 yylval.ival = OP_SUBST;
4683 scan_trans(char *start)
4692 yylval.ival = OP_NULL;
4694 s = scan_str(start);
4697 SvREFCNT_dec(lex_stuff);
4699 croak("Translation pattern not terminated");
4701 if (s[-1] == multi_open)
4707 SvREFCNT_dec(lex_stuff);
4710 SvREFCNT_dec(lex_repl);
4712 croak("Translation replacement not terminated");
4715 New(803,tbl,256,short);
4716 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4718 complement = Delete = squash = 0;
4719 while (*s == 'c' || *s == 'd' || *s == 's') {
4721 complement = OPpTRANS_COMPLEMENT;
4723 Delete = OPpTRANS_DELETE;
4725 squash = OPpTRANS_SQUASH;
4728 o->op_private = Delete|squash|complement;
4731 yylval.ival = OP_TRANS;
4736 scan_heredoc(register char *s)
4740 I32 op_type = OP_SCALAR;
4747 int outer = (rsfp && !lex_inwhat);
4751 e = tokenbuf + sizeof tokenbuf - 1;
4754 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4755 if (*peek && strchr("`'\"",*peek)) {
4758 s = delimcpy(d, e, s, bufend, term, &len);
4769 deprecate("bare << to mean <<\"\"");
4770 for (; isALNUM(*s); s++) {
4775 if (d >= tokenbuf + sizeof tokenbuf - 1)
4776 croak("Delimiter for here document is too long");
4781 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4782 herewas = newSVpv(s,bufend-s);
4784 s--, herewas = newSVpv(s,d-s);
4785 s += SvCUR(herewas);
4787 tmpstr = NEWSV(87,80);
4788 sv_upgrade(tmpstr, SVt_PVIV);
4793 else if (term == '`') {
4794 op_type = OP_BACKTICK;
4795 SvIVX(tmpstr) = '\\';
4799 multi_start = curcop->cop_line;
4800 multi_open = multi_close = '<';
4804 while (s < bufend &&
4805 (*s != term || memNE(s,tokenbuf,len)) ) {
4810 curcop->cop_line = multi_start;
4811 missingterm(tokenbuf);
4813 sv_setpvn(tmpstr,d+1,s-d);
4815 sv_catpvn(herewas,s,bufend-s);
4816 sv_setsv(linestr,herewas);
4817 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4818 bufend = SvPVX(linestr) + SvCUR(linestr);
4821 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4822 while (s >= bufend) { /* multiple line string? */
4824 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4825 curcop->cop_line = multi_start;
4826 missingterm(tokenbuf);
4829 if (PERLDB_LINE && curstash != debstash) {
4830 SV *sv = NEWSV(88,0);
4832 sv_upgrade(sv, SVt_PVMG);
4833 sv_setsv(sv,linestr);
4834 av_store(GvAV(curcop->cop_filegv),
4835 (I32)curcop->cop_line,sv);
4837 bufend = SvPVX(linestr) + SvCUR(linestr);
4838 if (*s == term && memEQ(s,tokenbuf,len)) {
4841 sv_catsv(linestr,herewas);
4842 bufend = SvPVX(linestr) + SvCUR(linestr);
4846 sv_catsv(tmpstr,linestr);
4849 multi_end = curcop->cop_line;
4851 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4852 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4853 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4855 SvREFCNT_dec(herewas);
4857 yylval.ival = op_type;
4862 scan_inputsymbol(char *start)
4864 register char *s = start;
4870 e = tokenbuf + sizeof tokenbuf;
4871 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4872 if (len >= sizeof tokenbuf)
4873 croak("Excessively long <> operator");
4875 croak("Unterminated <> operator");
4877 if (*d == '$' && d[1]) d++;
4878 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4880 if (d - tokenbuf != len) {
4881 yylval.ival = OP_GLOB;
4883 s = scan_str(start);
4885 croak("Glob not terminated");
4891 (void)strcpy(d,"ARGV");
4894 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4895 OP *o = newOP(OP_PADSV, 0);
4897 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4900 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4901 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4902 newUNOP(OP_RV2GV, 0,
4903 newUNOP(OP_RV2SV, 0,
4904 newGVOP(OP_GV, 0, gv))));
4906 yylval.ival = OP_NULL;
4909 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4910 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4911 yylval.ival = OP_NULL;
4918 scan_str(char *start)
4923 register char *s = start;
4932 multi_start = curcop->cop_line;
4934 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4939 sv_upgrade(sv, SVt_PVIV);
4941 (void)SvPOK_only(sv); /* validate pointer */
4944 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
4945 to = SvPVX(sv)+SvCUR(sv);
4946 if (multi_open == multi_close) {
4947 for (; s < bufend; s++,to++) {
4948 if (*s == '\n' && !rsfp)
4950 if (*s == '\\' && s+1 < bufend && term != '\\') {
4956 else if (*s == term)
4962 for (; s < bufend; s++,to++) {
4963 if (*s == '\n' && !rsfp)
4965 if (*s == '\\' && s+1 < bufend) {
4966 if ((s[1] == multi_open) || (s[1] == multi_close))
4971 else if (*s == multi_close && --brackets <= 0)
4973 else if (*s == multi_open)
4979 SvCUR_set(sv, to - SvPVX(sv));
4981 if (s < bufend) break; /* string ends on this line? */
4984 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4986 curcop->cop_line = multi_start;
4990 if (PERLDB_LINE && curstash != debstash) {
4991 SV *sv = NEWSV(88,0);
4993 sv_upgrade(sv, SVt_PVMG);
4994 sv_setsv(sv,linestr);
4995 av_store(GvAV(curcop->cop_filegv),
4996 (I32)curcop->cop_line, sv);
4998 bufend = SvPVX(linestr) + SvCUR(linestr);
5000 multi_end = curcop->cop_line;
5002 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5003 SvLEN_set(sv, SvCUR(sv) + 1);
5004 Renew(SvPVX(sv), SvLEN(sv), char);
5014 scan_num(char *start)
5016 register char *s = start;
5024 static char number_too_long[] = "Number too long";
5028 croak("panic: scan_num");
5033 bool overflowed = FALSE;
5039 else if (s[1] == '.')
5055 yyerror("Illegal octal digit");
5057 case '0': case '1': case '2': case '3': case '4':
5058 case '5': case '6': case '7':
5061 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5062 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5068 if (!overflowed && (n >> shift) != u) {
5069 warn("Integer overflow in %s number",
5070 (shift == 4) ? "hex" : "octal");
5082 case '1': case '2': case '3': case '4': case '5':
5083 case '6': case '7': case '8': case '9': case '.':
5086 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5088 while (isDIGIT(*s) || *s == '_') {
5090 if (dowarn && lastub && s - lastub != 3)
5091 warn("Misplaced _ in number");
5096 croak(number_too_long);
5100 if (dowarn && lastub && s - lastub != 3)
5101 warn("Misplaced _ in number");
5102 if (*s == '.' && s[1] != '.') {
5105 for (; isDIGIT(*s) || *s == '_'; s++) {
5107 croak(number_too_long);
5112 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5115 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5116 if (*s == '+' || *s == '-')
5118 while (isDIGIT(*s)) {
5120 croak(number_too_long);
5126 SET_NUMERIC_STANDARD();
5127 value = atof(tokenbuf);
5129 if (!floatit && (double)tryiv == value)
5130 sv_setiv(sv, tryiv);
5132 sv_setnv(sv, value);
5136 yylval.opval = newSVOP(OP_CONST, 0, sv);
5142 scan_formline(register char *s)
5147 SV *stuff = newSVpv("",0);
5148 bool needargs = FALSE;
5151 if (*s == '.' || *s == '}') {
5153 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5157 if (in_eval && !rsfp) {
5158 eol = strchr(s,'\n');
5163 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5165 for (t = s; t < eol; t++) {
5166 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5168 goto enough; /* ~~ must be first line in formline */
5170 if (*t == '@' || *t == '^')
5173 sv_catpvn(stuff, s, eol-s);
5177 s = filter_gets(linestr, rsfp, 0);
5178 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5179 bufend = bufptr + SvCUR(linestr);
5182 yyerror("Format not terminated");
5192 lex_state = LEX_NORMAL;
5193 nextval[nexttoke].ival = 0;
5197 lex_state = LEX_FORMLINE;
5198 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5200 nextval[nexttoke].ival = OP_FORMLINE;
5204 SvREFCNT_dec(stuff);
5216 cshlen = strlen(cshname);
5221 start_subparse(I32 is_format, U32 flags)
5224 I32 oldsavestack_ix = savestack_ix;
5225 CV* outsidecv = compcv;
5229 assert(SvTYPE(compcv) == SVt_PVCV);
5236 SAVESPTR(comppad_name);
5238 SAVEI32(comppad_name_fill);
5239 SAVEI32(min_intro_pending);
5240 SAVEI32(max_intro_pending);
5241 SAVEI32(pad_reset_pending);
5243 compcv = (CV*)NEWSV(1104,0);
5244 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5245 CvFLAGS(compcv) |= flags;
5248 av_push(comppad, Nullsv);
5249 curpad = AvARRAY(comppad);
5250 comppad_name = newAV();
5251 comppad_name_fill = 0;
5252 min_intro_pending = 0;
5254 subline = curcop->cop_line;
5256 av_store(comppad_name, 0, newSVpv("@_", 2));
5257 curpad[0] = (SV*)newAV();
5258 SvPADMY_on(curpad[0]); /* XXX Needed? */
5259 CvOWNER(compcv) = 0;
5260 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5261 MUTEX_INIT(CvMUTEXP(compcv));
5262 #endif /* USE_THREADS */
5264 comppadlist = newAV();
5265 AvREAL_off(comppadlist);
5266 av_store(comppadlist, 0, (SV*)comppad_name);
5267 av_store(comppadlist, 1, (SV*)comppad);
5269 CvPADLIST(compcv) = comppadlist;
5270 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5272 CvOWNER(compcv) = 0;
5273 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5274 MUTEX_INIT(CvMUTEXP(compcv));
5275 #endif /* USE_THREADS */
5277 return oldsavestack_ix;
5296 char *context = NULL;
5300 if (!yychar || (yychar == ';' && !rsfp))
5302 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5303 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5304 while (isSPACE(*oldoldbufptr))
5306 context = oldoldbufptr;
5307 contlen = bufptr - oldoldbufptr;
5309 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5310 oldbufptr != bufptr) {
5311 while (isSPACE(*oldbufptr))
5313 context = oldbufptr;
5314 contlen = bufptr - oldbufptr;
5316 else if (yychar > 255)
5317 where = "next token ???";
5318 else if ((yychar & 127) == 127) {
5319 if (lex_state == LEX_NORMAL ||
5320 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5321 where = "at end of line";
5323 where = "within pattern";
5325 where = "within string";
5328 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5330 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5331 else if (isPRINT_LC(yychar))
5332 sv_catpvf(where_sv, "%c", yychar);
5334 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5335 where = SvPVX(where_sv);
5337 msg = sv_2mortal(newSVpv(s, 0));
5338 sv_catpvf(msg, " at %_ line %ld, ",
5339 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5341 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5343 sv_catpvf(msg, "%s\n", where);
5344 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5346 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5347 (int)multi_open,(int)multi_close,(long)multi_start);
5353 sv_catsv(ERRSV, msg);
5355 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5356 if (++error_count >= 10)
5357 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5359 in_my_stash = Nullhv;