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");
225 win32_textfilter(int idx, SV *sv, int maxlen)
227 I32 count = FILTER_READ(idx+1, sv, maxlen);
228 if (count > 0 && !maxlen)
229 win32_strip_return(sv);
243 SAVEI32(lex_brackets);
244 SAVEI32(lex_fakebrack);
245 SAVEI32(lex_casemods);
250 SAVEI16(curcop->cop_line);
254 SAVEPPTR(oldoldbufptr);
257 SAVEPPTR(lex_brackstack);
258 SAVEPPTR(lex_casestack);
259 SAVEDESTRUCTOR(restore_rsfp, rsfp);
261 lex_state = LEX_NORMAL;
266 New(899, lex_brackstack, 120, char);
267 New(899, lex_casestack, 12, char);
268 SAVEFREEPV(lex_brackstack);
269 SAVEFREEPV(lex_casestack);
271 *lex_casestack = '\0';
275 SvREFCNT_dec(lex_stuff);
278 SvREFCNT_dec(lex_repl);
283 if (SvREADONLY(linestr))
284 linestr = sv_2mortal(newSVsv(linestr));
285 s = SvPV(linestr, len);
286 if (len && s[len-1] != ';') {
287 if (!(SvFLAGS(linestr) & SVs_TEMP))
288 linestr = sv_2mortal(newSVsv(linestr));
289 sv_catpvn(linestr, "\n;", 2);
292 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
293 bufend = bufptr + SvCUR(linestr);
295 rs = newSVpv("\n", 1);
306 restore_rsfp(void *f)
308 PerlIO *fp = (PerlIO*)f;
310 if (rsfp == PerlIO_stdin())
311 PerlIO_clearerr(rsfp);
312 else if (rsfp && (rsfp != fp))
329 while (*s == ' ' || *s == '\t') s++;
330 if (strnEQ(s, "line ", 5)) {
339 while (*s == ' ' || *s == '\t')
341 if (*s == '"' && (t = strchr(s+1, '"')))
345 return; /* false alarm */
346 for (t = s; !isSPACE(*t); t++) ;
351 curcop->cop_filegv = gv_fetchfile(s);
353 curcop->cop_filegv = gv_fetchfile(origfilename);
355 curcop->cop_line = atoi(n)-1;
359 skipspace(register char *s)
362 if (lex_formbrack && lex_brackets <= lex_formbrack) {
363 while (s < bufend && (*s == ' ' || *s == '\t'))
369 while (s < bufend && isSPACE(*s))
371 if (s < bufend && *s == '#') {
372 while (s < bufend && *s != '\n')
377 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
379 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
380 if (minus_n || minus_p) {
381 sv_setpv(linestr,minus_p ?
382 ";}continue{print or die qq(-p destination: $!\\n)" :
384 sv_catpv(linestr,";}");
385 minus_n = minus_p = 0;
388 sv_setpv(linestr,";");
389 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
390 bufend = SvPVX(linestr) + SvCUR(linestr);
391 if (preprocess && !in_eval)
392 (void)PerlProc_pclose(rsfp);
393 else if ((PerlIO*)rsfp == PerlIO_stdin())
394 PerlIO_clearerr(rsfp);
396 (void)PerlIO_close(rsfp);
402 linestart = bufptr = s + prevlen;
403 bufend = s + SvCUR(linestr);
406 if (PERLDB_LINE && curstash != debstash) {
407 SV *sv = NEWSV(85,0);
409 sv_upgrade(sv, SVt_PVMG);
410 sv_setpvn(sv,bufptr,bufend-bufptr);
411 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
422 if (oldoldbufptr != last_uni)
424 while (isSPACE(*last_uni))
426 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
427 if ((t = strchr(s, '(')) && t < bufptr)
431 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
438 #define UNI(f) return uni(f,s)
446 last_uni = oldbufptr;
457 #endif /* CRIPPLED_CC */
459 #define LOP(f,x) return lop(f,x,s)
464 (I32 f, expectation x, char *s)
470 #endif /* CAN_PROTOTYPE */
477 last_lop = oldbufptr;
493 nexttype[nexttoke] = type;
495 if (lex_state != LEX_KNOWNEXT) {
496 lex_defer = lex_state;
498 lex_state = LEX_KNOWNEXT;
503 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
508 start = skipspace(start);
511 (allow_pack && *s == ':') ||
512 (allow_initial_tick && *s == '\'') )
514 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
515 if (check_keyword && keyword(tokenbuf, len))
517 if (token == METHOD) {
527 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
528 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
535 force_ident(register char *s, int kind)
538 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
539 nextval[nexttoke].opval = o;
542 dTHR; /* just for in_eval */
543 o->op_private = OPpCONST_ENTERED;
544 /* XXX see note in pp_entereval() for why we forgo typo
545 warnings if the symbol must be introduced in an eval.
547 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
548 kind == '$' ? SVt_PV :
549 kind == '@' ? SVt_PVAV :
550 kind == '%' ? SVt_PVHV :
558 force_version(char *s)
560 OP *version = Nullop;
564 /* default VERSION number -- GBARR */
569 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
570 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
572 /* real VERSION number -- GBARR */
573 version = yylval.opval;
577 /* NOTE: The parser sees the package name and the VERSION swapped */
578 nextval[nexttoke].opval = version;
595 s = SvPV_force(sv, len);
599 while (s < send && *s != '\\')
606 if (s + 1 < send && (s[1] == '\\'))
607 s++; /* all that, just for this */
612 SvCUR_set(sv, d - SvPVX(sv));
620 register I32 op_type = yylval.ival;
622 if (op_type == OP_NULL) {
623 yylval.opval = lex_op;
627 if (op_type == OP_CONST || op_type == OP_READLINE) {
628 SV *sv = q(lex_stuff);
630 char *p = SvPV(sv, len);
631 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
637 sublex_info.super_state = lex_state;
638 sublex_info.sub_inwhat = op_type;
639 sublex_info.sub_op = lex_op;
640 lex_state = LEX_INTERPPUSH;
644 yylval.opval = lex_op;
658 lex_state = sublex_info.super_state;
660 SAVEI32(lex_brackets);
661 SAVEI32(lex_fakebrack);
662 SAVEI32(lex_casemods);
667 SAVEI16(curcop->cop_line);
670 SAVEPPTR(oldoldbufptr);
673 SAVEPPTR(lex_brackstack);
674 SAVEPPTR(lex_casestack);
679 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
680 bufend += SvCUR(linestr);
686 New(899, lex_brackstack, 120, char);
687 New(899, lex_casestack, 12, char);
688 SAVEFREEPV(lex_brackstack);
689 SAVEFREEPV(lex_casestack);
691 *lex_casestack = '\0';
693 lex_state = LEX_INTERPCONCAT;
694 curcop->cop_line = multi_start;
696 lex_inwhat = sublex_info.sub_inwhat;
697 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
698 lex_inpat = sublex_info.sub_op;
710 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
714 if (lex_casemods) { /* oops, we've got some unbalanced parens */
715 lex_state = LEX_INTERPCASEMOD;
719 /* Is there a right-hand side to take care of? */
720 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
723 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
724 bufend += SvCUR(linestr);
730 *lex_casestack = '\0';
732 if (SvCOMPILED(lex_repl)) {
733 lex_state = LEX_INTERPNORMAL;
737 lex_state = LEX_INTERPCONCAT;
743 bufend = SvPVX(linestr);
744 bufend += SvCUR(linestr);
751 scan_const(char *start)
753 register char *send = bufend;
754 SV *sv = NEWSV(93, send - start);
755 register char *s = start;
756 register char *d = SvPVX(sv);
757 bool dorange = FALSE;
761 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
762 : (lex_inwhat & OP_TRANS)
766 while (s < send || dorange) {
767 if (lex_inwhat == OP_TRANS) {
772 SvGROW(sv, SvLEN(sv) + 256);
776 for (i = (U8)*d; i <= max; i++)
781 else if (*s == '-' && s+1 < send && s != start) {
786 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
787 while (s < send && *s != ')')
790 else if (*s == '#' && lex_inpat &&
791 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
792 while (s+1 < send && *s != '\n')
795 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
797 else if (*s == '$') {
798 if (!lex_inpat) /* not a regexp, so $ must be var */
800 if (s + 1 < send && !strchr("()| \n\t", s[1]))
801 break; /* in regexp, $ might be tail anchor */
803 if (*s == '\\' && s+1 < send) {
805 if (*s && strchr(leaveit, *s)) {
810 if (lex_inwhat == OP_SUBST && !lex_inpat &&
811 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
814 warn("\\%c better written as $%c", *s, *s);
818 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
824 if (lex_inwhat == OP_TRANS) {
832 case '0': case '1': case '2': case '3':
833 case '4': case '5': case '6': case '7':
834 *d++ = scan_oct(s, 3, &len);
838 *d++ = scan_hex(++s, 2, &len);
874 SvCUR_set(sv, d - SvPVX(sv));
877 if (SvCUR(sv) + 5 < SvLEN(sv)) {
878 SvLEN_set(sv, SvCUR(sv) + 1);
879 Renew(SvPVX(sv), SvLEN(sv), char);
882 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
888 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
890 intuit_more(register char *s)
894 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
896 if (*s != '{' && *s != '[')
901 /* In a pattern, so maybe we have {n,m}. */
918 /* On the other hand, maybe we have a character class */
921 if (*s == ']' || *s == '^')
924 int weight = 2; /* let's weigh the evidence */
926 unsigned char un_char = 0, last_un_char;
927 char *send = strchr(s,']');
928 char tmpbuf[sizeof tokenbuf * 4];
930 if (!send) /* has to be an expression */
936 else if (isDIGIT(*s)) {
938 if (isDIGIT(s[1]) && s[2] == ']')
944 for (; s < send; s++) {
945 last_un_char = un_char;
946 un_char = (unsigned char)*s;
951 weight -= seen[un_char] * 10;
953 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
954 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
959 else if (*s == '$' && s[1] &&
960 strchr("[#!%*<>()-=",s[1])) {
961 if (/*{*/ strchr("])} =",s[2]))
970 if (strchr("wds]",s[1]))
972 else if (seen['\''] || seen['"'])
974 else if (strchr("rnftbxcav",s[1]))
976 else if (isDIGIT(s[1])) {
978 while (s[1] && isDIGIT(s[1]))
988 if (strchr("aA01! ",last_un_char))
990 if (strchr("zZ79~",s[1]))
994 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
995 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1000 if (keyword(tmpbuf, d - tmpbuf))
1003 if (un_char == last_un_char + 1)
1005 weight -= seen[un_char];
1010 if (weight >= 0) /* probably a character class */
1018 intuit_method(char *start, GV *gv)
1020 char *s = start + (*start == '$');
1021 char tmpbuf[sizeof tokenbuf];
1031 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1032 if (*start == '$') {
1033 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1038 return *s == '(' ? FUNCMETH : METHOD;
1040 if (!keyword(tmpbuf, len)) {
1041 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1042 if (indirgv && GvCVu(indirgv))
1044 /* filehandle or package name makes it a method */
1045 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1047 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1048 return 0; /* no assumptions -- "=>" quotes bearword */
1049 nextval[nexttoke].opval =
1050 (OP*)newSVOP(OP_CONST, 0,
1052 nextval[nexttoke].opval->op_private =
1057 return *s == '(' ? FUNCMETH : METHOD;
1067 char *pdb = PerlEnv_getenv("PERL5DB");
1071 SETERRNO(0,SS$_NORMAL);
1072 return "BEGIN { require 'perl5db.pl' }";
1078 /* Encoded script support. filter_add() effectively inserts a
1079 * 'pre-processing' function into the current source input stream.
1080 * Note that the filter function only applies to the current source file
1081 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1083 * The datasv parameter (which may be NULL) can be used to pass
1084 * private data to this instance of the filter. The filter function
1085 * can recover the SV using the FILTER_DATA macro and use it to
1086 * store private buffers and state information.
1088 * The supplied datasv parameter is upgraded to a PVIO type
1089 * and the IoDIRP field is used to store the function pointer.
1090 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1091 * private use must be set using malloc'd pointers.
1093 static int filter_debug = 0;
1096 filter_add(filter_t funcp, SV *datasv)
1098 if (!funcp){ /* temporary handy debugging hack to be deleted */
1099 filter_debug = atoi((char*)datasv);
1103 rsfp_filters = newAV();
1106 if (!SvUPGRADE(datasv, SVt_PVIO))
1107 die("Can't upgrade filter_add data to SVt_PVIO");
1108 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1110 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1111 av_unshift(rsfp_filters, 1);
1112 av_store(rsfp_filters, 0, datasv) ;
1117 /* Delete most recently added instance of this filter function. */
1119 filter_del(filter_t funcp)
1122 warn("filter_del func %p", funcp);
1123 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1125 /* if filter is on top of stack (usual case) just pop it off */
1126 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1127 sv_free(av_pop(rsfp_filters));
1131 /* we need to search for the correct entry and clear it */
1132 die("filter_del can only delete in reverse order (currently)");
1136 /* Invoke the n'th filter function for the current rsfp. */
1138 filter_read(int idx, SV *buf_sv, int maxlen)
1141 /* 0 = read one text line */
1148 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1149 /* Provide a default input filter to make life easy. */
1150 /* Note that we append to the line. This is handy. */
1152 warn("filter_read %d: from rsfp\n", idx);
1156 int old_len = SvCUR(buf_sv) ;
1158 /* ensure buf_sv is large enough */
1159 SvGROW(buf_sv, old_len + maxlen) ;
1160 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1161 if (PerlIO_error(rsfp))
1162 return -1; /* error */
1164 return 0 ; /* end of file */
1166 SvCUR_set(buf_sv, old_len + len) ;
1169 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1170 if (PerlIO_error(rsfp))
1171 return -1; /* error */
1173 return 0 ; /* end of file */
1177 return SvCUR(buf_sv);
1179 /* Skip this filter slot if filter has been deleted */
1180 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1182 warn("filter_read %d: skipped (filter deleted)\n", idx);
1183 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1185 /* Get function pointer hidden within datasv */
1186 funcp = (filter_t)IoDIRP(datasv);
1188 warn("filter_read %d: via function %p (%s)\n",
1189 idx, funcp, SvPV(datasv,na));
1190 /* Call function. The function is expected to */
1191 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1192 /* Return: <0:error, =0:eof, >0:not eof */
1193 return (*funcp)(idx, buf_sv, maxlen);
1198 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1201 if (!rsfp_filters) {
1202 filter_add(win32_textfilter,NULL);
1208 SvCUR_set(sv, 0); /* start with empty line */
1209 if (FILTER_READ(0, sv, 0) > 0)
1210 return ( SvPVX(sv) ) ;
1215 return (sv_gets(sv, fp, append));
1220 static char* exp_name[] =
1221 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1224 EXT int yychar; /* last token */
1237 if (pending_ident) {
1238 char pit = pending_ident;
1242 if (strchr(tokenbuf,':'))
1243 croak(no_myglob,tokenbuf);
1244 yylval.opval = newOP(OP_PADANY, 0);
1245 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1249 if (!strchr(tokenbuf,':')) {
1251 /* Check for single character per-thread SVs */
1252 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1253 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1254 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1256 yylval.opval = newOP(OP_THREADSV, 0);
1257 yylval.opval->op_targ = tmp;
1260 #endif /* USE_THREADS */
1261 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1262 if (last_lop_op == OP_SORT &&
1263 tokenbuf[0] == '$' &&
1264 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1267 for (d = in_eval ? oldoldbufptr : linestart;
1268 d < bufend && *d != '\n';
1271 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1272 croak("Can't use \"my %s\" in sort comparison",
1278 yylval.opval = newOP(OP_PADANY, 0);
1279 yylval.opval->op_targ = tmp;
1284 /* Force them to make up their mind on "@foo". */
1285 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1286 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1287 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1288 yyerror(form("In string, %s now must be written as \\%s",
1289 tokenbuf, tokenbuf));
1292 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1293 yylval.opval->op_private = OPpCONST_ENTERED;
1294 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1295 ((tokenbuf[0] == '$') ? SVt_PV
1296 : (tokenbuf[0] == '@') ? SVt_PVAV
1301 switch (lex_state) {
1303 case LEX_NORMAL: /* Some compilers will produce faster */
1304 case LEX_INTERPNORMAL: /* code if we comment these out. */
1310 yylval = nextval[nexttoke];
1312 lex_state = lex_defer;
1313 expect = lex_expect;
1314 lex_defer = LEX_NORMAL;
1316 return(nexttype[nexttoke]);
1318 case LEX_INTERPCASEMOD:
1320 if (bufptr != bufend && *bufptr != '\\')
1321 croak("panic: INTERPCASEMOD");
1323 if (bufptr == bufend || bufptr[1] == 'E') {
1326 oldmod = lex_casestack[--lex_casemods];
1327 lex_casestack[lex_casemods] = '\0';
1328 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1330 lex_state = LEX_INTERPCONCAT;
1334 if (bufptr != bufend)
1336 lex_state = LEX_INTERPCONCAT;
1341 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1342 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1343 if (strchr("LU", *s) &&
1344 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1346 lex_casestack[--lex_casemods] = '\0';
1349 if (lex_casemods > 10) {
1350 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1351 if (newlb != lex_casestack) {
1353 lex_casestack = newlb;
1356 lex_casestack[lex_casemods++] = *s;
1357 lex_casestack[lex_casemods] = '\0';
1358 lex_state = LEX_INTERPCONCAT;
1359 nextval[nexttoke].ival = 0;
1362 nextval[nexttoke].ival = OP_LCFIRST;
1364 nextval[nexttoke].ival = OP_UCFIRST;
1366 nextval[nexttoke].ival = OP_LC;
1368 nextval[nexttoke].ival = OP_UC;
1370 nextval[nexttoke].ival = OP_QUOTEMETA;
1372 croak("panic: yylex");
1384 case LEX_INTERPPUSH:
1385 return sublex_push();
1387 case LEX_INTERPSTART:
1388 if (bufptr == bufend)
1389 return sublex_done();
1391 lex_dojoin = (*bufptr == '@');
1392 lex_state = LEX_INTERPNORMAL;
1394 nextval[nexttoke].ival = 0;
1397 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1398 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1399 force_next(PRIVATEREF);
1401 force_ident("\"", '$');
1402 #endif /* USE_THREADS */
1403 nextval[nexttoke].ival = 0;
1405 nextval[nexttoke].ival = 0;
1407 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1416 case LEX_INTERPENDMAYBE:
1417 if (intuit_more(bufptr)) {
1418 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1426 lex_state = LEX_INTERPCONCAT;
1430 case LEX_INTERPCONCAT:
1433 croak("panic: INTERPCONCAT");
1435 if (bufptr == bufend)
1436 return sublex_done();
1438 if (SvIVX(linestr) == '\'') {
1439 SV *sv = newSVsv(linestr);
1442 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1446 s = scan_const(bufptr);
1448 lex_state = LEX_INTERPCASEMOD;
1450 lex_state = LEX_INTERPSTART;
1454 nextval[nexttoke] = yylval;
1467 lex_state = LEX_NORMAL;
1468 s = scan_formline(bufptr);
1475 oldoldbufptr = oldbufptr;
1478 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1484 croak("Unrecognized character \\%03o", *s & 255);
1487 goto fake_eof; /* emulate EOF on ^D or ^Z */
1493 yyerror("Missing right bracket");
1497 goto retry; /* ignore stray nulls */
1500 if (!in_eval && !preambled) {
1502 sv_setpv(linestr,incl_perldb());
1504 sv_catpv(linestr,";");
1506 while(AvFILLp(preambleav) >= 0) {
1507 SV *tmpsv = av_shift(preambleav);
1508 sv_catsv(linestr, tmpsv);
1509 sv_catpv(linestr, ";");
1512 sv_free((SV*)preambleav);
1515 if (minus_n || minus_p) {
1516 sv_catpv(linestr, "LINE: while (<>) {");
1518 sv_catpv(linestr,"chomp;");
1520 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1522 GvIMPORTED_AV_on(gv);
1524 if (strchr("/'\"", *splitstr)
1525 && strchr(splitstr + 1, *splitstr))
1526 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1529 s = "'~#\200\1'"; /* surely one char is unused...*/
1530 while (s[1] && strchr(splitstr, *s)) s++;
1532 sv_catpvf(linestr, "@F=split(%s%c",
1533 "q" + (delim == '\''), delim);
1534 for (s = splitstr; *s; s++) {
1536 sv_catpvn(linestr, "\\", 1);
1537 sv_catpvn(linestr, s, 1);
1539 sv_catpvf(linestr, "%c);", delim);
1543 sv_catpv(linestr,"@F=split(' ');");
1546 sv_catpv(linestr, "\n");
1547 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1548 bufend = SvPVX(linestr) + SvCUR(linestr);
1549 if (PERLDB_LINE && curstash != debstash) {
1550 SV *sv = NEWSV(85,0);
1552 sv_upgrade(sv, SVt_PVMG);
1553 sv_setsv(sv,linestr);
1554 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1559 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1562 if (preprocess && !in_eval)
1563 (void)PerlProc_pclose(rsfp);
1564 else if ((PerlIO *)rsfp == PerlIO_stdin())
1565 PerlIO_clearerr(rsfp);
1567 (void)PerlIO_close(rsfp);
1572 if (!in_eval && (minus_n || minus_p)) {
1573 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1574 sv_catpv(linestr,";}");
1575 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1576 bufend = SvPVX(linestr) + SvCUR(linestr);
1577 minus_n = minus_p = 0;
1580 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1581 sv_setpv(linestr,"");
1582 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1585 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1588 /* Incest with pod. */
1589 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1590 sv_setpv(linestr, "");
1591 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1592 bufend = SvPVX(linestr) + SvCUR(linestr);
1597 } while (doextract);
1598 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1599 if (PERLDB_LINE && curstash != debstash) {
1600 SV *sv = NEWSV(85,0);
1602 sv_upgrade(sv, SVt_PVMG);
1603 sv_setsv(sv,linestr);
1604 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1606 bufend = SvPVX(linestr) + SvCUR(linestr);
1607 if (curcop->cop_line == 1) {
1608 while (s < bufend && isSPACE(*s))
1610 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1614 if (*s == '#' && *(s+1) == '!')
1616 #ifdef ALTERNATE_SHEBANG
1618 static char as[] = ALTERNATE_SHEBANG;
1619 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1620 d = s + (sizeof(as) - 1);
1622 #endif /* ALTERNATE_SHEBANG */
1631 while (*d && !isSPACE(*d))
1635 #ifdef ARG_ZERO_IS_SCRIPT
1636 if (ipathend > ipath) {
1638 * HP-UX (at least) sets argv[0] to the script name,
1639 * which makes $^X incorrect. And Digital UNIX and Linux,
1640 * at least, set argv[0] to the basename of the Perl
1641 * interpreter. So, having found "#!", we'll set it right.
1643 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1644 assert(SvPOK(x) || SvGMAGICAL(x));
1645 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1646 sv_setpvn(x, ipath, ipathend - ipath);
1649 TAINT_NOT; /* $^X is always tainted, but that's OK */
1651 #endif /* ARG_ZERO_IS_SCRIPT */
1656 d = instr(s,"perl -");
1658 d = instr(s,"perl");
1659 #ifdef ALTERNATE_SHEBANG
1661 * If the ALTERNATE_SHEBANG on this system starts with a
1662 * character that can be part of a Perl expression, then if
1663 * we see it but not "perl", we're probably looking at the
1664 * start of Perl code, not a request to hand off to some
1665 * other interpreter. Similarly, if "perl" is there, but
1666 * not in the first 'word' of the line, we assume the line
1667 * contains the start of the Perl program.
1669 if (d && *s != '#') {
1671 while (*c && !strchr("; \t\r\n\f\v#", *c))
1674 d = Nullch; /* "perl" not in first word; ignore */
1676 *s = '#'; /* Don't try to parse shebang line */
1678 #endif /* ALTERNATE_SHEBANG */
1683 !instr(s,"indir") &&
1684 instr(origargv[0],"perl"))
1690 while (s < bufend && isSPACE(*s))
1693 Newz(899,newargv,origargc+3,char*);
1695 while (s < bufend && !isSPACE(*s))
1698 Copy(origargv+1, newargv+2, origargc+1, char*);
1703 execv(ipath, newargv);
1704 croak("Can't exec %s", ipath);
1707 U32 oldpdb = perldb;
1708 bool oldn = minus_n;
1709 bool oldp = minus_p;
1711 while (*d && !isSPACE(*d)) d++;
1712 while (*d == ' ' || *d == '\t') d++;
1716 if (*d == 'M' || *d == 'm') {
1718 while (*d && !isSPACE(*d)) d++;
1719 croak("Too late for \"-%.*s\" option",
1722 d = moreswitches(d);
1724 if (PERLDB_LINE && !oldpdb ||
1725 ( minus_n || minus_p ) && !(oldn || oldp) )
1726 /* if we have already added "LINE: while (<>) {",
1727 we must not do it again */
1729 sv_setpv(linestr, "");
1730 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1731 bufend = SvPVX(linestr) + SvCUR(linestr);
1734 (void)gv_fetchfile(origfilename);
1741 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1743 lex_state = LEX_FORMLINE;
1749 warn("Illegal character \\%03o (carriage return)", '\r');
1751 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1753 case ' ': case '\t': case '\f': case 013:
1758 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1760 while (s < d && *s != '\n')
1765 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1767 lex_state = LEX_FORMLINE;
1777 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1782 while (s < bufend && (*s == ' ' || *s == '\t'))
1785 if (strnEQ(s,"=>",2)) {
1787 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1788 (int)tmp, (int)tmp);
1789 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1790 OPERATOR('-'); /* unary minus */
1792 last_uni = oldbufptr;
1793 last_lop_op = OP_FTEREAD; /* good enough */
1795 case 'r': FTST(OP_FTEREAD);
1796 case 'w': FTST(OP_FTEWRITE);
1797 case 'x': FTST(OP_FTEEXEC);
1798 case 'o': FTST(OP_FTEOWNED);
1799 case 'R': FTST(OP_FTRREAD);
1800 case 'W': FTST(OP_FTRWRITE);
1801 case 'X': FTST(OP_FTREXEC);
1802 case 'O': FTST(OP_FTROWNED);
1803 case 'e': FTST(OP_FTIS);
1804 case 'z': FTST(OP_FTZERO);
1805 case 's': FTST(OP_FTSIZE);
1806 case 'f': FTST(OP_FTFILE);
1807 case 'd': FTST(OP_FTDIR);
1808 case 'l': FTST(OP_FTLINK);
1809 case 'p': FTST(OP_FTPIPE);
1810 case 'S': FTST(OP_FTSOCK);
1811 case 'u': FTST(OP_FTSUID);
1812 case 'g': FTST(OP_FTSGID);
1813 case 'k': FTST(OP_FTSVTX);
1814 case 'b': FTST(OP_FTBLK);
1815 case 'c': FTST(OP_FTCHR);
1816 case 't': FTST(OP_FTTTY);
1817 case 'T': FTST(OP_FTTEXT);
1818 case 'B': FTST(OP_FTBINARY);
1819 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1820 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1821 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1823 croak("Unrecognized file test: -%c", (int)tmp);
1830 if (expect == XOPERATOR)
1835 else if (*s == '>') {
1838 if (isIDFIRST(*s)) {
1839 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1847 if (expect == XOPERATOR)
1850 if (isSPACE(*s) || !isSPACE(*bufptr))
1852 OPERATOR('-'); /* unary minus */
1859 if (expect == XOPERATOR)
1864 if (expect == XOPERATOR)
1867 if (isSPACE(*s) || !isSPACE(*bufptr))
1873 if (expect != XOPERATOR) {
1874 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1876 force_ident(tokenbuf, '*');
1889 if (expect == XOPERATOR) {
1894 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1897 yyerror("Final % should be \\% or %name");
1900 pending_ident = '%';
1922 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1923 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1928 if (curcop->cop_line < copline)
1929 copline = curcop->cop_line;
1940 if (lex_brackets <= 0)
1941 yyerror("Unmatched right bracket");
1944 if (lex_state == LEX_INTERPNORMAL) {
1945 if (lex_brackets == 0) {
1946 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1947 lex_state = LEX_INTERPEND;
1954 if (lex_brackets > 100) {
1955 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1956 if (newlb != lex_brackstack) {
1958 lex_brackstack = newlb;
1963 if (lex_formbrack) {
1967 if (oldoldbufptr == last_lop)
1968 lex_brackstack[lex_brackets++] = XTERM;
1970 lex_brackstack[lex_brackets++] = XOPERATOR;
1971 OPERATOR(HASHBRACK);
1973 while (s < bufend && (*s == ' ' || *s == '\t'))
1977 if (d < bufend && *d == '-') {
1980 while (d < bufend && (*d == ' ' || *d == '\t'))
1983 if (d < bufend && isIDFIRST(*d)) {
1984 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
1986 while (d < bufend && (*d == ' ' || *d == '\t'))
1989 char minus = (tokenbuf[0] == '-');
1991 (keyword(tokenbuf + 1, len) ||
1992 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
1993 perl_get_cv(tokenbuf + 1, FALSE) ))
1994 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
1995 tokenbuf + !minus, tokenbuf + !minus);
1996 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2003 lex_brackstack[lex_brackets++] = XSTATE;
2007 lex_brackstack[lex_brackets++] = XOPERATOR;
2012 if (oldoldbufptr == last_lop)
2013 lex_brackstack[lex_brackets++] = XTERM;
2015 lex_brackstack[lex_brackets++] = XOPERATOR;
2018 if (expect == XSTATE) {
2019 lex_brackstack[lex_brackets-1] = XSTATE;
2022 OPERATOR(HASHBRACK);
2024 /* This hack serves to disambiguate a pair of curlies
2025 * as being a block or an anon hash. Normally, expectation
2026 * determines that, but in cases where we're not in a
2027 * position to expect anything in particular (like inside
2028 * eval"") we have to resolve the ambiguity. This code
2029 * covers the case where the first term in the curlies is a
2030 * quoted string. Most other cases need to be explicitly
2031 * disambiguated by prepending a `+' before the opening
2032 * curly in order to force resolution as an anon hash.
2034 * XXX should probably propagate the outer expectation
2035 * into eval"" to rely less on this hack, but that could
2036 * potentially break current behavior of eval"".
2040 if (*s == '\'' || *s == '"' || *s == '`') {
2041 /* common case: get past first string, handling escapes */
2042 for (t++; t < bufend && *t != *s;)
2043 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2047 else if (*s == 'q') {
2050 || ((*t == 'q' || *t == 'x') && ++t < bufend
2051 && !isALNUM(*t)))) {
2053 char open, close, term;
2056 while (t < bufend && isSPACE(*t))
2060 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2064 for (t++; t < bufend; t++) {
2065 if (*t == '\\' && t+1 < bufend && open != '\\')
2067 else if (*t == open)
2071 for (t++; t < bufend; t++) {
2072 if (*t == '\\' && t+1 < bufend)
2074 else if (*t == close && --brackets <= 0)
2076 else if (*t == open)
2082 else if (isALPHA(*s)) {
2083 for (t++; t < bufend && isALNUM(*t); t++) ;
2085 while (t < bufend && isSPACE(*t))
2087 /* if comma follows first term, call it an anon hash */
2088 /* XXX it could be a comma expression with loop modifiers */
2089 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2090 || (*t == '=' && t[1] == '>')))
2091 OPERATOR(HASHBRACK);
2095 lex_brackstack[lex_brackets-1] = XSTATE;
2101 yylval.ival = curcop->cop_line;
2102 if (isSPACE(*s) || *s == '#')
2103 copline = NOLINE; /* invalidate current command line number */
2108 if (lex_brackets <= 0)
2109 yyerror("Unmatched right bracket");
2111 expect = (expectation)lex_brackstack[--lex_brackets];
2112 if (lex_brackets < lex_formbrack)
2114 if (lex_state == LEX_INTERPNORMAL) {
2115 if (lex_brackets == 0) {
2116 if (lex_fakebrack) {
2117 lex_state = LEX_INTERPEND;
2119 return yylex(); /* ignore fake brackets */
2121 if (*s == '-' && s[1] == '>')
2122 lex_state = LEX_INTERPENDMAYBE;
2123 else if (*s != '[' && *s != '{')
2124 lex_state = LEX_INTERPEND;
2127 if (lex_brackets < lex_fakebrack) {
2130 return yylex(); /* ignore fake brackets */
2140 if (expect == XOPERATOR) {
2141 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2149 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2152 force_ident(tokenbuf, '&');
2156 yylval.ival = (OPpENTERSUB_AMPER<<8);
2175 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2176 warn("Reversed %c= operator",(int)tmp);
2178 if (expect == XSTATE && isALPHA(tmp) &&
2179 (s == linestart+1 || s[-2] == '\n') )
2181 if (in_eval && !rsfp) {
2186 if (strnEQ(s,"=cut",4)) {
2203 if (lex_brackets < lex_formbrack) {
2205 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2206 if (*t == '\n' || *t == '#') {
2224 if (expect != XOPERATOR) {
2225 if (s[1] != '<' && !strchr(s,'>'))
2228 s = scan_heredoc(s);
2230 s = scan_inputsymbol(s);
2231 TERM(sublex_start());
2236 SHop(OP_LEFT_SHIFT);
2250 SHop(OP_RIGHT_SHIFT);
2259 if (expect == XOPERATOR) {
2260 if (lex_formbrack && lex_brackets == lex_formbrack) {
2263 return ','; /* grandfather non-comma-format format */
2267 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2268 if (expect == XOPERATOR)
2269 no_op("Array length", bufptr);
2271 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2276 pending_ident = '#';
2280 if (expect == XOPERATOR)
2281 no_op("Scalar", bufptr);
2283 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2286 yyerror("Final $ should be \\$ or $name");
2290 /* This kludge not intended to be bulletproof. */
2291 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2292 yylval.opval = newSVOP(OP_CONST, 0,
2293 newSViv((IV)compiling.cop_arybase));
2294 yylval.opval->op_private = OPpCONST_ARYBASE;
2299 if (lex_state == LEX_NORMAL)
2302 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2308 isSPACE(*t) || isALNUM(*t) || *t == '$';
2311 bufptr = skipspace(bufptr);
2312 while (t < bufend && *t != ']')
2314 warn("Multidimensional syntax %.*s not supported",
2315 (t - bufptr) + 1, bufptr);
2319 else if (*s == '{') {
2321 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2322 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2324 char tmpbuf[sizeof tokenbuf];
2326 for (t++; isSPACE(*t); t++) ;
2327 if (isIDFIRST(*t)) {
2328 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2329 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2330 warn("You need to quote \"%s\"", tmpbuf);
2337 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2338 bool islop = (last_lop == oldoldbufptr);
2339 if (!islop || last_lop_op == OP_GREPSTART)
2341 else if (strchr("$@\"'`q", *s))
2342 expect = XTERM; /* e.g. print $fh "foo" */
2343 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2344 expect = XTERM; /* e.g. print $fh &sub */
2345 else if (isIDFIRST(*s)) {
2346 char tmpbuf[sizeof tokenbuf];
2347 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2348 if (tmp = keyword(tmpbuf, len)) {
2349 /* binary operators exclude handle interpretations */
2361 expect = XTERM; /* e.g. print $fh length() */
2366 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2367 if (gv && GvCVu(gv))
2368 expect = XTERM; /* e.g. print $fh subr() */
2371 else if (isDIGIT(*s))
2372 expect = XTERM; /* e.g. print $fh 3 */
2373 else if (*s == '.' && isDIGIT(s[1]))
2374 expect = XTERM; /* e.g. print $fh .3 */
2375 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2376 expect = XTERM; /* e.g. print $fh -1 */
2377 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2378 expect = XTERM; /* print $fh <<"EOF" */
2380 pending_ident = '$';
2384 if (expect == XOPERATOR)
2387 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2390 yyerror("Final @ should be \\@ or @name");
2393 if (lex_state == LEX_NORMAL)
2395 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2399 /* Warn about @ where they meant $. */
2401 if (*s == '[' || *s == '{') {
2403 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2405 if (*t == '}' || *t == ']') {
2407 bufptr = skipspace(bufptr);
2408 warn("Scalar value %.*s better written as $%.*s",
2409 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2414 pending_ident = '@';
2417 case '/': /* may either be division or pattern */
2418 case '?': /* may either be conditional or pattern */
2419 if (expect != XOPERATOR) {
2420 /* Disable warning on "study /blah/" */
2421 if (oldoldbufptr == last_uni
2422 && (*last_uni != 's' || s - last_uni < 5
2423 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2426 TERM(sublex_start());
2434 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2435 (s == linestart || s[-1] == '\n') ) {
2440 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2446 yylval.ival = OPf_SPECIAL;
2452 if (expect != XOPERATOR)
2457 case '0': case '1': case '2': case '3': case '4':
2458 case '5': case '6': case '7': case '8': case '9':
2460 if (expect == XOPERATOR)
2466 if (expect == XOPERATOR) {
2467 if (lex_formbrack && lex_brackets == lex_formbrack) {
2470 return ','; /* grandfather non-comma-format format */
2476 missingterm((char*)0);
2477 yylval.ival = OP_CONST;
2478 TERM(sublex_start());
2482 if (expect == XOPERATOR) {
2483 if (lex_formbrack && lex_brackets == lex_formbrack) {
2486 return ','; /* grandfather non-comma-format format */
2492 missingterm((char*)0);
2493 yylval.ival = OP_CONST;
2494 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2495 if (*d == '$' || *d == '@' || *d == '\\') {
2496 yylval.ival = OP_STRINGIFY;
2500 TERM(sublex_start());
2504 if (expect == XOPERATOR)
2505 no_op("Backticks",s);
2507 missingterm((char*)0);
2508 yylval.ival = OP_BACKTICK;
2510 TERM(sublex_start());
2514 if (dowarn && lex_inwhat && isDIGIT(*s))
2515 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2516 if (expect == XOPERATOR)
2517 no_op("Backslash",s);
2521 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2560 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2562 /* Some keywords can be followed by any delimiter, including ':' */
2563 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2564 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2565 (tokenbuf[0] == 'q' &&
2566 strchr("qwx", tokenbuf[1]))));
2568 /* x::* is just a word, unless x is "CORE" */
2569 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2573 while (d < bufend && isSPACE(*d))
2574 d++; /* no comments skipped here, or s### is misparsed */
2576 /* Is this a label? */
2577 if (!tmp && expect == XSTATE
2578 && d < bufend && *d == ':' && *(d + 1) != ':') {
2580 yylval.pval = savepv(tokenbuf);
2585 /* Check for keywords */
2586 tmp = keyword(tokenbuf, len);
2588 /* Is this a word before a => operator? */
2589 if (strnEQ(d,"=>",2)) {
2591 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2592 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2593 tokenbuf, tokenbuf);
2594 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2595 yylval.opval->op_private = OPpCONST_BARE;
2599 if (tmp < 0) { /* second-class keyword? */
2600 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2601 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2602 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2603 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2604 (gv = *gvp) != (GV*)&sv_undef &&
2605 GvCVu(gv) && GvIMPORTED_CV(gv))))
2607 tmp = 0; /* overridden by importation */
2610 && -tmp==KEY_lock /* XXX generalizable kludge */
2611 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2613 tmp = 0; /* any sub overrides "weak" keyword */
2616 tmp = -tmp; gv = Nullgv; gvp = 0;
2623 default: /* not a keyword */
2626 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2628 /* Get the rest if it looks like a package qualifier */
2630 if (*s == '\'' || *s == ':' && s[1] == ':') {
2631 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2634 croak("Bad name after %s::", tokenbuf);
2637 if (expect == XOPERATOR) {
2638 if (bufptr == linestart) {
2644 no_op("Bareword",s);
2647 /* Look for a subroutine with this name in current package. */
2650 sv = newSVpv("CORE::GLOBAL::",14);
2651 sv_catpv(sv,tokenbuf);
2654 sv = newSVpv(tokenbuf,0);
2656 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2658 /* Presume this is going to be a bareword of some sort. */
2661 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2662 yylval.opval->op_private = OPpCONST_BARE;
2664 /* See if it's the indirect object for a list operator. */
2667 oldoldbufptr < bufptr &&
2668 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2669 /* NO SKIPSPACE BEFORE HERE! */
2671 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2673 bool immediate_paren = *s == '(';
2675 /* (Now we can afford to cross potential line boundary.) */
2678 /* Two barewords in a row may indicate method call. */
2680 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2683 /* If not a declared subroutine, it's an indirect object. */
2684 /* (But it's an indir obj regardless for sort.) */
2686 if ((last_lop_op == OP_SORT ||
2687 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2688 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2689 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2694 /* If followed by a paren, it's certainly a subroutine. */
2700 if (gv && GvCVu(gv)) {
2701 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2702 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2707 nextval[nexttoke].opval = yylval.opval;
2714 /* If followed by var or block, call it a method (unless sub) */
2716 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2717 last_lop = oldbufptr;
2718 last_lop_op = OP_METHOD;
2722 /* If followed by a bareword, see if it looks like indir obj. */
2724 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2727 /* Not a method, so call it a subroutine (if defined) */
2729 if (gv && GvCVu(gv)) {
2731 if (lastchar == '-')
2732 warn("Ambiguous use of -%s resolved as -&%s()",
2733 tokenbuf, tokenbuf);
2734 last_lop = oldbufptr;
2735 last_lop_op = OP_ENTERSUB;
2736 /* Check for a constant sub */
2738 if ((sv = cv_const_sv(cv))) {
2740 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2741 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2742 yylval.opval->op_private = 0;
2746 /* Resolve to GV now. */
2747 op_free(yylval.opval);
2748 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2749 /* Is there a prototype? */
2752 char *proto = SvPV((SV*)cv, len);
2755 if (strEQ(proto, "$"))
2757 if (*proto == '&' && *s == '{') {
2758 sv_setpv(subname,"__ANON__");
2762 nextval[nexttoke].opval = yylval.opval;
2768 if (hints & HINT_STRICT_SUBS &&
2771 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2772 last_lop_op != OP_ACCEPT &&
2773 last_lop_op != OP_PIPE_OP &&
2774 last_lop_op != OP_SOCKPAIR)
2777 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2782 /* Call it a bare word */
2786 if (lastchar != '-') {
2787 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2789 warn(warn_reserved, tokenbuf);
2792 if (lastchar && strchr("*%&", lastchar)) {
2793 warn("Operator or semicolon missing before %c%s",
2794 lastchar, tokenbuf);
2795 warn("Ambiguous use of %c resolved as operator %c",
2796 lastchar, lastchar);
2802 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2803 newSVsv(GvSV(curcop->cop_filegv)));
2807 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2808 newSVpvf("%ld", (long)curcop->cop_line));
2811 case KEY___PACKAGE__:
2812 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2814 ? newSVsv(curstname)
2823 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2824 char *pname = "main";
2825 if (tokenbuf[2] == 'D')
2826 pname = HvNAME(curstash ? curstash : defstash);
2827 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2830 GvIOp(gv) = newIO();
2831 IoIFP(GvIOp(gv)) = rsfp;
2832 #if defined(HAS_FCNTL) && defined(F_SETFD)
2834 int fd = PerlIO_fileno(rsfp);
2835 fcntl(fd,F_SETFD,fd >= 3);
2838 /* Mark this internal pseudo-handle as clean */
2839 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2841 IoTYPE(GvIOp(gv)) = '|';
2842 else if ((PerlIO*)rsfp == PerlIO_stdin())
2843 IoTYPE(GvIOp(gv)) = '-';
2845 IoTYPE(GvIOp(gv)) = '<';
2856 if (expect == XSTATE) {
2863 if (*s == ':' && s[1] == ':') {
2866 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2867 tmp = keyword(tokenbuf, len);
2881 LOP(OP_ACCEPT,XTERM);
2887 LOP(OP_ATAN2,XTERM);
2896 LOP(OP_BLESS,XTERM);
2905 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2925 LOP(OP_CRYPT,XTERM);
2929 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2930 if (*d != '0' && isDIGIT(*d))
2931 yywarn("chmod: mode argument is missing initial 0");
2933 LOP(OP_CHMOD,XTERM);
2936 LOP(OP_CHOWN,XTERM);
2939 LOP(OP_CONNECT,XTERM);
2955 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2959 hints |= HINT_BLOCK_SCOPE;
2969 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2970 LOP(OP_DBMOPEN,XTERM);
2976 s = force_word(s,WORD,TRUE,FALSE,FALSE);
2983 yylval.ival = curcop->cop_line;
2997 expect = (*s == '{') ? XTERMBLOCK : XTERM;
2998 UNIBRACK(OP_ENTEREVAL);
3013 case KEY_endhostent:
3019 case KEY_endservent:
3022 case KEY_endprotoent:
3033 yylval.ival = curcop->cop_line;
3035 if (isIDFIRST(*s)) {
3037 if ((bufend - p) >= 3 &&
3038 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3042 croak("Missing $ on loop variable");
3047 LOP(OP_FORMLINE,XTERM);
3053 LOP(OP_FCNTL,XTERM);
3059 LOP(OP_FLOCK,XTERM);
3068 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3071 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3086 case KEY_getpriority:
3087 LOP(OP_GETPRIORITY,XTERM);
3089 case KEY_getprotobyname:
3092 case KEY_getprotobynumber:
3093 LOP(OP_GPBYNUMBER,XTERM);
3095 case KEY_getprotoent:
3107 case KEY_getpeername:
3108 UNI(OP_GETPEERNAME);
3110 case KEY_gethostbyname:
3113 case KEY_gethostbyaddr:
3114 LOP(OP_GHBYADDR,XTERM);
3116 case KEY_gethostent:
3119 case KEY_getnetbyname:
3122 case KEY_getnetbyaddr:
3123 LOP(OP_GNBYADDR,XTERM);
3128 case KEY_getservbyname:
3129 LOP(OP_GSBYNAME,XTERM);
3131 case KEY_getservbyport:
3132 LOP(OP_GSBYPORT,XTERM);
3134 case KEY_getservent:
3137 case KEY_getsockname:
3138 UNI(OP_GETSOCKNAME);
3140 case KEY_getsockopt:
3141 LOP(OP_GSOCKOPT,XTERM);
3163 yylval.ival = curcop->cop_line;
3167 LOP(OP_INDEX,XTERM);
3173 LOP(OP_IOCTL,XTERM);
3185 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3216 LOP(OP_LISTEN,XTERM);
3226 TERM(sublex_start());
3229 LOP(OP_MAPSTART,XREF);
3232 LOP(OP_MKDIR,XTERM);
3235 LOP(OP_MSGCTL,XTERM);
3238 LOP(OP_MSGGET,XTERM);
3241 LOP(OP_MSGRCV,XTERM);
3244 LOP(OP_MSGSND,XTERM);
3249 if (isIDFIRST(*s)) {
3250 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3251 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3255 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3262 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3269 if (expect != XSTATE)
3270 yyerror("\"no\" not allowed in expression");
3271 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3272 s = force_version(s);
3281 if (isIDFIRST(*s)) {
3283 for (d = s; isALNUM(*d); d++) ;
3285 if (strchr("|&*+-=!?:.", *t))
3286 warn("Precedence problem: open %.*s should be open(%.*s)",
3292 yylval.ival = OP_OR;
3302 LOP(OP_OPEN_DIR,XTERM);
3305 checkcomma(s,tokenbuf,"filehandle");
3309 checkcomma(s,tokenbuf,"filehandle");
3328 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3332 LOP(OP_PIPE_OP,XTERM);
3337 missingterm((char*)0);
3338 yylval.ival = OP_CONST;
3339 TERM(sublex_start());
3347 missingterm((char*)0);
3348 if (dowarn && SvLEN(lex_stuff)) {
3349 d = SvPV_force(lex_stuff, len);
3350 for (; len; --len, ++d) {
3352 warn("Possible attempt to separate words with commas");
3356 warn("Possible attempt to put comments in qw() list");
3362 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3366 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3369 yylval.ival = OP_SPLIT;
3373 last_lop = oldbufptr;
3374 last_lop_op = OP_SPLIT;
3380 missingterm((char*)0);
3381 yylval.ival = OP_STRINGIFY;
3382 if (SvIVX(lex_stuff) == '\'')
3383 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3384 TERM(sublex_start());
3389 missingterm((char*)0);
3390 yylval.ival = OP_BACKTICK;
3392 TERM(sublex_start());
3399 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3400 if (isIDFIRST(*tokenbuf))
3401 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3403 yyerror("<> should be quotes");
3410 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3414 LOP(OP_RENAME,XTERM);
3423 LOP(OP_RINDEX,XTERM);
3446 LOP(OP_REVERSE,XTERM);
3457 TERM(sublex_start());
3459 TOKEN(1); /* force error */
3468 LOP(OP_SELECT,XTERM);
3474 LOP(OP_SEMCTL,XTERM);
3477 LOP(OP_SEMGET,XTERM);
3480 LOP(OP_SEMOP,XTERM);
3486 LOP(OP_SETPGRP,XTERM);
3488 case KEY_setpriority:
3489 LOP(OP_SETPRIORITY,XTERM);
3491 case KEY_sethostent:
3497 case KEY_setservent:
3500 case KEY_setprotoent:
3510 LOP(OP_SEEKDIR,XTERM);
3512 case KEY_setsockopt:
3513 LOP(OP_SSOCKOPT,XTERM);
3519 LOP(OP_SHMCTL,XTERM);
3522 LOP(OP_SHMGET,XTERM);
3525 LOP(OP_SHMREAD,XTERM);
3528 LOP(OP_SHMWRITE,XTERM);
3531 LOP(OP_SHUTDOWN,XTERM);
3540 LOP(OP_SOCKET,XTERM);
3542 case KEY_socketpair:
3543 LOP(OP_SOCKPAIR,XTERM);
3546 checkcomma(s,tokenbuf,"subroutine name");
3548 if (*s == ';' || *s == ')') /* probably a close */
3549 croak("sort is now a reserved word");
3551 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3555 LOP(OP_SPLIT,XTERM);
3558 LOP(OP_SPRINTF,XTERM);
3561 LOP(OP_SPLICE,XTERM);
3577 LOP(OP_SUBSTR,XTERM);
3584 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3585 char tmpbuf[sizeof tokenbuf];
3587 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3588 if (strchr(tmpbuf, ':'))
3589 sv_setpv(subname, tmpbuf);
3591 sv_setsv(subname,curstname);
3592 sv_catpvn(subname,"::",2);
3593 sv_catpvn(subname,tmpbuf,len);
3595 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3599 expect = XTERMBLOCK;
3600 sv_setpv(subname,"?");
3603 if (tmp == KEY_format) {
3606 lex_formbrack = lex_brackets + 1;
3610 /* Look for a prototype */
3617 SvREFCNT_dec(lex_stuff);
3619 croak("Prototype not terminated");
3622 d = SvPVX(lex_stuff);
3624 for (p = d; *p; ++p) {
3629 SvCUR(lex_stuff) = tmp;
3632 nextval[1] = nextval[0];
3633 nexttype[1] = nexttype[0];
3634 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3635 nexttype[0] = THING;
3636 if (nexttoke == 1) {
3637 lex_defer = lex_state;
3638 lex_expect = expect;
3639 lex_state = LEX_KNOWNEXT;
3644 if (*SvPV(subname,na) == '?') {
3645 sv_setpv(subname,"__ANON__");
3652 LOP(OP_SYSTEM,XREF);
3655 LOP(OP_SYMLINK,XTERM);
3658 LOP(OP_SYSCALL,XTERM);
3661 LOP(OP_SYSOPEN,XTERM);
3664 LOP(OP_SYSSEEK,XTERM);
3667 LOP(OP_SYSREAD,XTERM);
3670 LOP(OP_SYSWRITE,XTERM);
3674 TERM(sublex_start());
3695 LOP(OP_TRUNCATE,XTERM);
3707 yylval.ival = curcop->cop_line;
3711 yylval.ival = curcop->cop_line;
3715 LOP(OP_UNLINK,XTERM);
3721 LOP(OP_UNPACK,XTERM);
3724 LOP(OP_UTIME,XTERM);
3728 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3729 if (*d != '0' && isDIGIT(*d))
3730 yywarn("umask: argument is missing initial 0");
3735 LOP(OP_UNSHIFT,XTERM);
3738 if (expect != XSTATE)
3739 yyerror("\"use\" not allowed in expression");
3742 s = force_version(s);
3743 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3744 nextval[nexttoke].opval = Nullop;
3749 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3750 s = force_version(s);
3763 yylval.ival = curcop->cop_line;
3767 hints |= HINT_BLOCK_SCOPE;
3774 LOP(OP_WAITPID,XTERM);
3780 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3784 if (expect == XOPERATOR)
3790 yylval.ival = OP_XOR;
3795 TERM(sublex_start());
3801 keyword(register char *d, I32 len)
3806 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3807 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3808 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3809 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3810 if (strEQ(d,"__END__")) return KEY___END__;
3814 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3819 if (strEQ(d,"and")) return -KEY_and;
3820 if (strEQ(d,"abs")) return -KEY_abs;
3823 if (strEQ(d,"alarm")) return -KEY_alarm;
3824 if (strEQ(d,"atan2")) return -KEY_atan2;
3827 if (strEQ(d,"accept")) return -KEY_accept;
3832 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3835 if (strEQ(d,"bless")) return -KEY_bless;
3836 if (strEQ(d,"bind")) return -KEY_bind;
3837 if (strEQ(d,"binmode")) return -KEY_binmode;
3840 if (strEQ(d,"CORE")) return -KEY_CORE;
3845 if (strEQ(d,"cmp")) return -KEY_cmp;
3846 if (strEQ(d,"chr")) return -KEY_chr;
3847 if (strEQ(d,"cos")) return -KEY_cos;
3850 if (strEQ(d,"chop")) return KEY_chop;
3853 if (strEQ(d,"close")) return -KEY_close;
3854 if (strEQ(d,"chdir")) return -KEY_chdir;
3855 if (strEQ(d,"chomp")) return KEY_chomp;
3856 if (strEQ(d,"chmod")) return -KEY_chmod;
3857 if (strEQ(d,"chown")) return -KEY_chown;
3858 if (strEQ(d,"crypt")) return -KEY_crypt;
3861 if (strEQ(d,"chroot")) return -KEY_chroot;
3862 if (strEQ(d,"caller")) return -KEY_caller;
3865 if (strEQ(d,"connect")) return -KEY_connect;
3868 if (strEQ(d,"closedir")) return -KEY_closedir;
3869 if (strEQ(d,"continue")) return -KEY_continue;
3874 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3879 if (strEQ(d,"do")) return KEY_do;
3882 if (strEQ(d,"die")) return -KEY_die;
3885 if (strEQ(d,"dump")) return -KEY_dump;
3888 if (strEQ(d,"delete")) return KEY_delete;
3891 if (strEQ(d,"defined")) return KEY_defined;
3892 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3895 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3900 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3901 if (strEQ(d,"END")) return KEY_END;
3906 if (strEQ(d,"eq")) return -KEY_eq;
3909 if (strEQ(d,"eof")) return -KEY_eof;
3910 if (strEQ(d,"exp")) return -KEY_exp;
3913 if (strEQ(d,"else")) return KEY_else;
3914 if (strEQ(d,"exit")) return -KEY_exit;
3915 if (strEQ(d,"eval")) return KEY_eval;
3916 if (strEQ(d,"exec")) return -KEY_exec;
3917 if (strEQ(d,"each")) return KEY_each;
3920 if (strEQ(d,"elsif")) return KEY_elsif;
3923 if (strEQ(d,"exists")) return KEY_exists;
3924 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3927 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3928 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3931 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3934 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3935 if (strEQ(d,"endservent")) return -KEY_endservent;
3938 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3945 if (strEQ(d,"for")) return KEY_for;
3948 if (strEQ(d,"fork")) return -KEY_fork;
3951 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3952 if (strEQ(d,"flock")) return -KEY_flock;
3955 if (strEQ(d,"format")) return KEY_format;
3956 if (strEQ(d,"fileno")) return -KEY_fileno;
3959 if (strEQ(d,"foreach")) return KEY_foreach;
3962 if (strEQ(d,"formline")) return -KEY_formline;
3968 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3969 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
3973 if (strnEQ(d,"get",3)) {
3978 if (strEQ(d,"ppid")) return -KEY_getppid;
3979 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
3982 if (strEQ(d,"pwent")) return -KEY_getpwent;
3983 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
3984 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
3987 if (strEQ(d,"peername")) return -KEY_getpeername;
3988 if (strEQ(d,"protoent")) return -KEY_getprotoent;
3989 if (strEQ(d,"priority")) return -KEY_getpriority;
3992 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
3995 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
3999 else if (*d == 'h') {
4000 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4001 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4002 if (strEQ(d,"hostent")) return -KEY_gethostent;
4004 else if (*d == 'n') {
4005 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4006 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4007 if (strEQ(d,"netent")) return -KEY_getnetent;
4009 else if (*d == 's') {
4010 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4011 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4012 if (strEQ(d,"servent")) return -KEY_getservent;
4013 if (strEQ(d,"sockname")) return -KEY_getsockname;
4014 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4016 else if (*d == 'g') {
4017 if (strEQ(d,"grent")) return -KEY_getgrent;
4018 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4019 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4021 else if (*d == 'l') {
4022 if (strEQ(d,"login")) return -KEY_getlogin;
4024 else if (strEQ(d,"c")) return -KEY_getc;
4029 if (strEQ(d,"gt")) return -KEY_gt;
4030 if (strEQ(d,"ge")) return -KEY_ge;
4033 if (strEQ(d,"grep")) return KEY_grep;
4034 if (strEQ(d,"goto")) return KEY_goto;
4035 if (strEQ(d,"glob")) return KEY_glob;
4038 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4043 if (strEQ(d,"hex")) return -KEY_hex;
4046 if (strEQ(d,"INIT")) return KEY_INIT;
4051 if (strEQ(d,"if")) return KEY_if;
4054 if (strEQ(d,"int")) return -KEY_int;
4057 if (strEQ(d,"index")) return -KEY_index;
4058 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4063 if (strEQ(d,"join")) return -KEY_join;
4067 if (strEQ(d,"keys")) return KEY_keys;
4068 if (strEQ(d,"kill")) return -KEY_kill;
4073 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4074 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4080 if (strEQ(d,"lt")) return -KEY_lt;
4081 if (strEQ(d,"le")) return -KEY_le;
4082 if (strEQ(d,"lc")) return -KEY_lc;
4085 if (strEQ(d,"log")) return -KEY_log;
4088 if (strEQ(d,"last")) return KEY_last;
4089 if (strEQ(d,"link")) return -KEY_link;
4090 if (strEQ(d,"lock")) return -KEY_lock;
4093 if (strEQ(d,"local")) return KEY_local;
4094 if (strEQ(d,"lstat")) return -KEY_lstat;
4097 if (strEQ(d,"length")) return -KEY_length;
4098 if (strEQ(d,"listen")) return -KEY_listen;
4101 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4104 if (strEQ(d,"localtime")) return -KEY_localtime;
4110 case 1: return KEY_m;
4112 if (strEQ(d,"my")) return KEY_my;
4115 if (strEQ(d,"map")) return KEY_map;
4118 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4121 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4122 if (strEQ(d,"msgget")) return -KEY_msgget;
4123 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4124 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4129 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4132 if (strEQ(d,"next")) return KEY_next;
4133 if (strEQ(d,"ne")) return -KEY_ne;
4134 if (strEQ(d,"not")) return -KEY_not;
4135 if (strEQ(d,"no")) return KEY_no;
4140 if (strEQ(d,"or")) return -KEY_or;
4143 if (strEQ(d,"ord")) return -KEY_ord;
4144 if (strEQ(d,"oct")) return -KEY_oct;
4147 if (strEQ(d,"open")) return -KEY_open;
4150 if (strEQ(d,"opendir")) return -KEY_opendir;
4157 if (strEQ(d,"pop")) return KEY_pop;
4158 if (strEQ(d,"pos")) return KEY_pos;
4161 if (strEQ(d,"push")) return KEY_push;
4162 if (strEQ(d,"pack")) return -KEY_pack;
4163 if (strEQ(d,"pipe")) return -KEY_pipe;
4166 if (strEQ(d,"print")) return KEY_print;
4169 if (strEQ(d,"printf")) return KEY_printf;
4172 if (strEQ(d,"package")) return KEY_package;
4175 if (strEQ(d,"prototype")) return KEY_prototype;
4180 if (strEQ(d,"q")) return KEY_q;
4181 if (strEQ(d,"qq")) return KEY_qq;
4182 if (strEQ(d,"qw")) return KEY_qw;
4183 if (strEQ(d,"qx")) return KEY_qx;
4185 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4190 if (strEQ(d,"ref")) return -KEY_ref;
4193 if (strEQ(d,"read")) return -KEY_read;
4194 if (strEQ(d,"rand")) return -KEY_rand;
4195 if (strEQ(d,"recv")) return -KEY_recv;
4196 if (strEQ(d,"redo")) return KEY_redo;
4199 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4200 if (strEQ(d,"reset")) return -KEY_reset;
4203 if (strEQ(d,"return")) return KEY_return;
4204 if (strEQ(d,"rename")) return -KEY_rename;
4205 if (strEQ(d,"rindex")) return -KEY_rindex;
4208 if (strEQ(d,"require")) return -KEY_require;
4209 if (strEQ(d,"reverse")) return -KEY_reverse;
4210 if (strEQ(d,"readdir")) return -KEY_readdir;
4213 if (strEQ(d,"readlink")) return -KEY_readlink;
4214 if (strEQ(d,"readline")) return -KEY_readline;
4215 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4218 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4224 case 0: return KEY_s;
4226 if (strEQ(d,"scalar")) return KEY_scalar;
4231 if (strEQ(d,"seek")) return -KEY_seek;
4232 if (strEQ(d,"send")) return -KEY_send;
4235 if (strEQ(d,"semop")) return -KEY_semop;
4238 if (strEQ(d,"select")) return -KEY_select;
4239 if (strEQ(d,"semctl")) return -KEY_semctl;
4240 if (strEQ(d,"semget")) return -KEY_semget;
4243 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4244 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4247 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4248 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4251 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4254 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4255 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4256 if (strEQ(d,"setservent")) return -KEY_setservent;
4259 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4260 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4267 if (strEQ(d,"shift")) return KEY_shift;
4270 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4271 if (strEQ(d,"shmget")) return -KEY_shmget;
4274 if (strEQ(d,"shmread")) return -KEY_shmread;
4277 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4278 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4283 if (strEQ(d,"sin")) return -KEY_sin;
4286 if (strEQ(d,"sleep")) return -KEY_sleep;
4289 if (strEQ(d,"sort")) return KEY_sort;
4290 if (strEQ(d,"socket")) return -KEY_socket;
4291 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4294 if (strEQ(d,"split")) return KEY_split;
4295 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4296 if (strEQ(d,"splice")) return KEY_splice;
4299 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4302 if (strEQ(d,"srand")) return -KEY_srand;
4305 if (strEQ(d,"stat")) return -KEY_stat;
4306 if (strEQ(d,"study")) return KEY_study;
4309 if (strEQ(d,"substr")) return -KEY_substr;
4310 if (strEQ(d,"sub")) return KEY_sub;
4315 if (strEQ(d,"system")) return -KEY_system;
4318 if (strEQ(d,"symlink")) return -KEY_symlink;
4319 if (strEQ(d,"syscall")) return -KEY_syscall;
4320 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4321 if (strEQ(d,"sysread")) return -KEY_sysread;
4322 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4325 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4334 if (strEQ(d,"tr")) return KEY_tr;
4337 if (strEQ(d,"tie")) return KEY_tie;
4340 if (strEQ(d,"tell")) return -KEY_tell;
4341 if (strEQ(d,"tied")) return KEY_tied;
4342 if (strEQ(d,"time")) return -KEY_time;
4345 if (strEQ(d,"times")) return -KEY_times;
4348 if (strEQ(d,"telldir")) return -KEY_telldir;
4351 if (strEQ(d,"truncate")) return -KEY_truncate;
4358 if (strEQ(d,"uc")) return -KEY_uc;
4361 if (strEQ(d,"use")) return KEY_use;
4364 if (strEQ(d,"undef")) return KEY_undef;
4365 if (strEQ(d,"until")) return KEY_until;
4366 if (strEQ(d,"untie")) return KEY_untie;
4367 if (strEQ(d,"utime")) return -KEY_utime;
4368 if (strEQ(d,"umask")) return -KEY_umask;
4371 if (strEQ(d,"unless")) return KEY_unless;
4372 if (strEQ(d,"unpack")) return -KEY_unpack;
4373 if (strEQ(d,"unlink")) return -KEY_unlink;
4376 if (strEQ(d,"unshift")) return KEY_unshift;
4377 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4382 if (strEQ(d,"values")) return -KEY_values;
4383 if (strEQ(d,"vec")) return -KEY_vec;
4388 if (strEQ(d,"warn")) return -KEY_warn;
4389 if (strEQ(d,"wait")) return -KEY_wait;
4392 if (strEQ(d,"while")) return KEY_while;
4393 if (strEQ(d,"write")) return -KEY_write;
4396 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4399 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4404 if (len == 1) return -KEY_x;
4405 if (strEQ(d,"xor")) return -KEY_xor;
4408 if (len == 1) return KEY_y;
4417 checkcomma(register char *s, char *name, char *what)
4421 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4423 for (w = s+2; *w && level; w++) {
4430 for (; *w && isSPACE(*w); w++) ;
4431 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4432 warn("%s (...) interpreted as function",name);
4434 while (s < bufend && isSPACE(*s))
4438 while (s < bufend && isSPACE(*s))
4440 if (isIDFIRST(*s)) {
4444 while (s < bufend && isSPACE(*s))
4449 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4453 croak("No comma allowed after %s", what);
4459 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4461 register char *d = dest;
4462 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4465 croak(ident_too_long);
4468 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4473 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4486 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4493 if (lex_brackets == 0)
4498 e = d + destlen - 3; /* two-character token, ending NUL */
4500 while (isDIGIT(*s)) {
4502 croak(ident_too_long);
4509 croak(ident_too_long);
4512 else if (*s == '\'' && isIDFIRST(s[1])) {
4517 else if (*s == ':' && s[1] == ':') {
4528 if (lex_state != LEX_NORMAL)
4529 lex_state = LEX_INTERPENDMAYBE;
4532 if (*s == '$' && s[1] &&
4533 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4535 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4536 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4549 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4554 if (isSPACE(s[-1])) {
4557 if (ch != ' ' && ch != '\t') {
4563 if (isIDFIRST(*d)) {
4565 while (isALNUM(*s) || *s == ':')
4568 while (s < send && (*s == ' ' || *s == '\t')) s++;
4569 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4570 if (dowarn && keyword(dest, d - dest)) {
4571 char *brack = *s == '[' ? "[...]" : "{...}";
4572 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4573 funny, dest, brack, funny, dest, brack);
4575 lex_fakebrack = lex_brackets+1;
4577 lex_brackstack[lex_brackets++] = XOPERATOR;
4583 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4584 lex_state = LEX_INTERPEND;
4587 if (dowarn && lex_state == LEX_NORMAL &&
4588 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4589 warn("Ambiguous use of %c{%s} resolved to %c%s",
4590 funny, dest, funny, dest);
4593 s = bracket; /* let the parser handle it */
4597 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4598 lex_state = LEX_INTERPEND;
4602 void pmflag(U16 *pmfl, int ch)
4607 *pmfl |= PMf_GLOBAL;
4609 *pmfl |= PMf_CONTINUE;
4613 *pmfl |= PMf_MULTILINE;
4615 *pmfl |= PMf_SINGLELINE;
4617 *pmfl |= PMf_EXTENDED;
4621 scan_pat(char *start)
4626 s = scan_str(start);
4629 SvREFCNT_dec(lex_stuff);
4631 croak("Search pattern not terminated");
4634 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4635 if (multi_open == '?')
4636 pm->op_pmflags |= PMf_ONCE;
4637 while (*s && strchr("iogcmsx", *s))
4638 pmflag(&pm->op_pmflags,*s++);
4639 pm->op_pmpermflags = pm->op_pmflags;
4642 yylval.ival = OP_MATCH;
4647 scan_subst(char *start)
4654 yylval.ival = OP_NULL;
4656 s = scan_str(start);
4660 SvREFCNT_dec(lex_stuff);
4662 croak("Substitution pattern not terminated");
4665 if (s[-1] == multi_open)
4668 first_start = multi_start;
4672 SvREFCNT_dec(lex_stuff);
4675 SvREFCNT_dec(lex_repl);
4677 croak("Substitution replacement not terminated");
4679 multi_start = first_start; /* so whole substitution is taken together */
4681 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4682 while (*s && strchr("iogcmsex", *s)) {
4688 pmflag(&pm->op_pmflags,*s++);
4693 pm->op_pmflags |= PMf_EVAL;
4694 repl = newSVpv("",0);
4696 sv_catpv(repl, es ? "eval " : "do ");
4697 sv_catpvn(repl, "{ ", 2);
4698 sv_catsv(repl, lex_repl);
4699 sv_catpvn(repl, " };", 2);
4700 SvCOMPILED_on(repl);
4701 SvREFCNT_dec(lex_repl);
4705 pm->op_pmpermflags = pm->op_pmflags;
4707 yylval.ival = OP_SUBST;
4712 scan_trans(char *start)
4721 yylval.ival = OP_NULL;
4723 s = scan_str(start);
4726 SvREFCNT_dec(lex_stuff);
4728 croak("Translation pattern not terminated");
4730 if (s[-1] == multi_open)
4736 SvREFCNT_dec(lex_stuff);
4739 SvREFCNT_dec(lex_repl);
4741 croak("Translation replacement not terminated");
4744 New(803,tbl,256,short);
4745 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4747 complement = Delete = squash = 0;
4748 while (*s == 'c' || *s == 'd' || *s == 's') {
4750 complement = OPpTRANS_COMPLEMENT;
4752 Delete = OPpTRANS_DELETE;
4754 squash = OPpTRANS_SQUASH;
4757 o->op_private = Delete|squash|complement;
4760 yylval.ival = OP_TRANS;
4765 scan_heredoc(register char *s)
4769 I32 op_type = OP_SCALAR;
4776 int outer = (rsfp && !lex_inwhat);
4780 e = tokenbuf + sizeof tokenbuf - 1;
4783 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4784 if (*peek && strchr("`'\"",*peek)) {
4787 s = delimcpy(d, e, s, bufend, term, &len);
4798 deprecate("bare << to mean <<\"\"");
4799 for (; isALNUM(*s); s++) {
4804 if (d >= tokenbuf + sizeof tokenbuf - 1)
4805 croak("Delimiter for here document is too long");
4810 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4811 herewas = newSVpv(s,bufend-s);
4813 s--, herewas = newSVpv(s,d-s);
4814 s += SvCUR(herewas);
4816 tmpstr = NEWSV(87,80);
4817 sv_upgrade(tmpstr, SVt_PVIV);
4822 else if (term == '`') {
4823 op_type = OP_BACKTICK;
4824 SvIVX(tmpstr) = '\\';
4828 multi_start = curcop->cop_line;
4829 multi_open = multi_close = '<';
4833 while (s < bufend &&
4834 (*s != term || memNE(s,tokenbuf,len)) ) {
4839 curcop->cop_line = multi_start;
4840 missingterm(tokenbuf);
4842 sv_setpvn(tmpstr,d+1,s-d);
4844 sv_catpvn(herewas,s,bufend-s);
4845 sv_setsv(linestr,herewas);
4846 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4847 bufend = SvPVX(linestr) + SvCUR(linestr);
4850 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4851 while (s >= bufend) { /* multiple line string? */
4853 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4854 curcop->cop_line = multi_start;
4855 missingterm(tokenbuf);
4858 if (PERLDB_LINE && curstash != debstash) {
4859 SV *sv = NEWSV(88,0);
4861 sv_upgrade(sv, SVt_PVMG);
4862 sv_setsv(sv,linestr);
4863 av_store(GvAV(curcop->cop_filegv),
4864 (I32)curcop->cop_line,sv);
4866 bufend = SvPVX(linestr) + SvCUR(linestr);
4867 if (*s == term && memEQ(s,tokenbuf,len)) {
4870 sv_catsv(linestr,herewas);
4871 bufend = SvPVX(linestr) + SvCUR(linestr);
4875 sv_catsv(tmpstr,linestr);
4878 multi_end = curcop->cop_line;
4880 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4881 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4882 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4884 SvREFCNT_dec(herewas);
4886 yylval.ival = op_type;
4891 scan_inputsymbol(char *start)
4893 register char *s = start;
4899 e = tokenbuf + sizeof tokenbuf;
4900 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4901 if (len >= sizeof tokenbuf)
4902 croak("Excessively long <> operator");
4904 croak("Unterminated <> operator");
4906 if (*d == '$' && d[1]) d++;
4907 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4909 if (d - tokenbuf != len) {
4910 yylval.ival = OP_GLOB;
4912 s = scan_str(start);
4914 croak("Glob not terminated");
4920 (void)strcpy(d,"ARGV");
4923 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4924 OP *o = newOP(OP_PADSV, 0);
4926 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4929 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4930 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4931 newUNOP(OP_RV2GV, 0,
4932 newUNOP(OP_RV2SV, 0,
4933 newGVOP(OP_GV, 0, gv))));
4935 yylval.ival = OP_NULL;
4938 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4939 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4940 yylval.ival = OP_NULL;
4947 scan_str(char *start)
4952 register char *s = start;
4961 multi_start = curcop->cop_line;
4963 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4968 sv_upgrade(sv, SVt_PVIV);
4970 (void)SvPOK_only(sv); /* validate pointer */
4973 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
4974 to = SvPVX(sv)+SvCUR(sv);
4975 if (multi_open == multi_close) {
4976 for (; s < bufend; s++,to++) {
4977 if (*s == '\n' && !rsfp)
4979 if (*s == '\\' && s+1 < bufend && term != '\\') {
4985 else if (*s == term)
4991 for (; s < bufend; s++,to++) {
4992 if (*s == '\n' && !rsfp)
4994 if (*s == '\\' && s+1 < bufend) {
4995 if ((s[1] == multi_open) || (s[1] == multi_close))
5000 else if (*s == multi_close && --brackets <= 0)
5002 else if (*s == multi_open)
5008 SvCUR_set(sv, to - SvPVX(sv));
5010 if (s < bufend) break; /* string ends on this line? */
5013 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5015 curcop->cop_line = multi_start;
5019 if (PERLDB_LINE && curstash != debstash) {
5020 SV *sv = NEWSV(88,0);
5022 sv_upgrade(sv, SVt_PVMG);
5023 sv_setsv(sv,linestr);
5024 av_store(GvAV(curcop->cop_filegv),
5025 (I32)curcop->cop_line, sv);
5027 bufend = SvPVX(linestr) + SvCUR(linestr);
5029 multi_end = curcop->cop_line;
5031 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5032 SvLEN_set(sv, SvCUR(sv) + 1);
5033 Renew(SvPVX(sv), SvLEN(sv), char);
5043 scan_num(char *start)
5045 register char *s = start;
5053 static char number_too_long[] = "Number too long";
5057 croak("panic: scan_num");
5062 bool overflowed = FALSE;
5068 else if (s[1] == '.')
5084 yyerror("Illegal octal digit");
5086 case '0': case '1': case '2': case '3': case '4':
5087 case '5': case '6': case '7':
5090 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5091 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5097 if (!overflowed && (n >> shift) != u) {
5098 warn("Integer overflow in %s number",
5099 (shift == 4) ? "hex" : "octal");
5111 case '1': case '2': case '3': case '4': case '5':
5112 case '6': case '7': case '8': case '9': case '.':
5115 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5117 while (isDIGIT(*s) || *s == '_') {
5119 if (dowarn && lastub && s - lastub != 3)
5120 warn("Misplaced _ in number");
5125 croak(number_too_long);
5129 if (dowarn && lastub && s - lastub != 3)
5130 warn("Misplaced _ in number");
5131 if (*s == '.' && s[1] != '.') {
5134 for (; isDIGIT(*s) || *s == '_'; s++) {
5136 croak(number_too_long);
5141 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5144 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5145 if (*s == '+' || *s == '-')
5147 while (isDIGIT(*s)) {
5149 croak(number_too_long);
5155 SET_NUMERIC_STANDARD();
5156 value = atof(tokenbuf);
5158 if (!floatit && (double)tryiv == value)
5159 sv_setiv(sv, tryiv);
5161 sv_setnv(sv, value);
5165 yylval.opval = newSVOP(OP_CONST, 0, sv);
5171 scan_formline(register char *s)
5176 SV *stuff = newSVpv("",0);
5177 bool needargs = FALSE;
5180 if (*s == '.' || *s == '}') {
5182 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5186 if (in_eval && !rsfp) {
5187 eol = strchr(s,'\n');
5192 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5194 for (t = s; t < eol; t++) {
5195 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5197 goto enough; /* ~~ must be first line in formline */
5199 if (*t == '@' || *t == '^')
5202 sv_catpvn(stuff, s, eol-s);
5206 s = filter_gets(linestr, rsfp, 0);
5207 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5208 bufend = bufptr + SvCUR(linestr);
5211 yyerror("Format not terminated");
5221 lex_state = LEX_NORMAL;
5222 nextval[nexttoke].ival = 0;
5226 lex_state = LEX_FORMLINE;
5227 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5229 nextval[nexttoke].ival = OP_FORMLINE;
5233 SvREFCNT_dec(stuff);
5245 cshlen = strlen(cshname);
5250 start_subparse(I32 is_format, U32 flags)
5253 I32 oldsavestack_ix = savestack_ix;
5254 CV* outsidecv = compcv;
5258 assert(SvTYPE(compcv) == SVt_PVCV);
5265 SAVESPTR(comppad_name);
5267 SAVEI32(comppad_name_fill);
5268 SAVEI32(min_intro_pending);
5269 SAVEI32(max_intro_pending);
5270 SAVEI32(pad_reset_pending);
5272 compcv = (CV*)NEWSV(1104,0);
5273 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5274 CvFLAGS(compcv) |= flags;
5277 av_push(comppad, Nullsv);
5278 curpad = AvARRAY(comppad);
5279 comppad_name = newAV();
5280 comppad_name_fill = 0;
5281 min_intro_pending = 0;
5283 subline = curcop->cop_line;
5285 av_store(comppad_name, 0, newSVpv("@_", 2));
5286 curpad[0] = (SV*)newAV();
5287 SvPADMY_on(curpad[0]); /* XXX Needed? */
5288 CvOWNER(compcv) = 0;
5289 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5290 MUTEX_INIT(CvMUTEXP(compcv));
5291 #endif /* USE_THREADS */
5293 comppadlist = newAV();
5294 AvREAL_off(comppadlist);
5295 av_store(comppadlist, 0, (SV*)comppad_name);
5296 av_store(comppadlist, 1, (SV*)comppad);
5298 CvPADLIST(compcv) = comppadlist;
5299 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5301 CvOWNER(compcv) = 0;
5302 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5303 MUTEX_INIT(CvMUTEXP(compcv));
5304 #endif /* USE_THREADS */
5306 return oldsavestack_ix;
5325 char *context = NULL;
5329 if (!yychar || (yychar == ';' && !rsfp))
5331 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5332 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5333 while (isSPACE(*oldoldbufptr))
5335 context = oldoldbufptr;
5336 contlen = bufptr - oldoldbufptr;
5338 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5339 oldbufptr != bufptr) {
5340 while (isSPACE(*oldbufptr))
5342 context = oldbufptr;
5343 contlen = bufptr - oldbufptr;
5345 else if (yychar > 255)
5346 where = "next token ???";
5347 else if ((yychar & 127) == 127) {
5348 if (lex_state == LEX_NORMAL ||
5349 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5350 where = "at end of line";
5352 where = "within pattern";
5354 where = "within string";
5357 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5359 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5360 else if (isPRINT_LC(yychar))
5361 sv_catpvf(where_sv, "%c", yychar);
5363 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5364 where = SvPVX(where_sv);
5366 msg = sv_2mortal(newSVpv(s, 0));
5367 sv_catpvf(msg, " at %_ line %ld, ",
5368 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5370 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5372 sv_catpvf(msg, "%s\n", where);
5373 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5375 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5376 (int)multi_open,(int)multi_close,(long)multi_start);
5382 sv_catsv(ERRSV, msg);
5384 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5385 if (++error_count >= 10)
5386 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5388 in_my_stash = Nullhv;