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
18 static void check_uni _((void));
19 static void force_next _((I32 type));
20 static char *force_version _((char *start));
21 static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
22 static SV *tokeq _((SV *sv));
23 static char *scan_const _((char *start));
24 static char *scan_formline _((char *s));
25 static char *scan_heredoc _((char *s));
26 static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
28 static char *scan_inputsymbol _((char *start));
29 static char *scan_pat _((char *start));
30 static char *scan_str _((char *start));
31 static char *scan_subst _((char *start));
32 static char *scan_trans _((char *start));
33 static char *scan_word _((char *s, char *dest, STRLEN destlen,
34 int allow_package, STRLEN *slp));
35 static char *skipspace _((char *s));
36 static void checkcomma _((char *s, char *name, char *what));
37 static void force_ident _((char *s, int kind));
38 static void incline _((char *s));
39 static int intuit_method _((char *s, GV *gv));
40 static int intuit_more _((char *s));
41 static I32 lop _((I32 f, expectation x, char *s));
42 static void missingterm _((char *s));
43 static void no_op _((char *what, char *s));
44 static void set_csh _((void));
45 static I32 sublex_done _((void));
46 static I32 sublex_push _((void));
47 static I32 sublex_start _((void));
49 static int uni _((I32 f, char *s));
51 static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
52 static void restore_rsfp _((void *f));
53 #endif /* PERL_OBJECT */
55 static char ident_too_long[] = "Identifier too long";
57 static char *linestart; /* beg. of most recently read line */
59 static char pending_ident; /* pending identifier lookup */
62 I32 super_state; /* lexer state to save */
63 I32 sub_inwhat; /* "lex_inwhat" to use */
64 OP *sub_op; /* "lex_op" to use */
67 /* The following are arranged oddly so that the guard on the switch statement
68 * can get by with a single comparison (if the compiler is smart enough).
71 /* #define LEX_NOTPARSING 11 is done in perl.h. */
74 #define LEX_INTERPNORMAL 9
75 #define LEX_INTERPCASEMOD 8
76 #define LEX_INTERPPUSH 7
77 #define LEX_INTERPSTART 6
78 #define LEX_INTERPEND 5
79 #define LEX_INTERPENDMAYBE 4
80 #define LEX_INTERPCONCAT 3
81 #define LEX_INTERPCONST 2
82 #define LEX_FORMLINE 1
83 #define LEX_KNOWNEXT 0
92 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
94 # include <unistd.h> /* Needed for execv() */
102 #include "keywords.h"
107 #define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
109 #define TOKEN(retval) return (bufptr = s,(int)retval)
110 #define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
111 #define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
112 #define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
113 #define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
114 #define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
115 #define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
116 #define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
117 #define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
118 #define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
119 #define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
120 #define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
121 #define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
122 #define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
123 #define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
124 #define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
125 #define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
126 #define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
127 #define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
128 #define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
130 /* This bit of chicanery makes a unary function followed by
131 * a parenthesis into a function with one argument, highest precedence.
133 #define UNI(f) return(yylval.ival = f, \
136 last_uni = oldbufptr, \
138 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
140 #define UNIBRACK(f) return(yylval.ival = f, \
142 last_uni = oldbufptr, \
143 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
145 /* grandfather return to old style */
146 #define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
151 if (*bufptr == '=') {
153 if (toketype == ANDAND)
154 yylval.ival = OP_ANDASSIGN;
155 else if (toketype == OROR)
156 yylval.ival = OP_ORASSIGN;
163 no_op(char *what, char *s)
165 char *oldbp = bufptr;
166 bool is_first = (oldbufptr == linestart);
169 yywarn(form("%s found where operator expected", what));
171 warn("\t(Missing semicolon on previous line?)\n");
172 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
174 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
175 if (t < bufptr && isSPACE(*t))
176 warn("\t(Do you need to predeclare %.*s?)\n",
177 t - oldoldbufptr, oldoldbufptr);
181 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
191 char *nl = strrchr(s,'\n');
195 else if (multi_close < 32 || multi_close == 127) {
197 tmpbuf[1] = toCTRL(multi_close);
203 *tmpbuf = multi_close;
207 q = strchr(s,'"') ? '\'' : '"';
208 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
215 warn("Use of %s is deprecated", s);
221 deprecate("comma-less variable list");
227 win32_textfilter(int idx, SV *sv, int maxlen)
229 I32 count = FILTER_READ(idx+1, sv, maxlen);
230 if (count > 0 && !maxlen)
231 win32_strip_return(sv);
245 SAVEI32(lex_brackets);
246 SAVEI32(lex_fakebrack);
247 SAVEI32(lex_casemods);
252 SAVEI16(curcop->cop_line);
256 SAVEPPTR(oldoldbufptr);
259 SAVEPPTR(lex_brackstack);
260 SAVEPPTR(lex_casestack);
261 SAVEDESTRUCTOR(restore_rsfp, rsfp);
263 lex_state = LEX_NORMAL;
268 New(899, lex_brackstack, 120, char);
269 New(899, lex_casestack, 12, char);
270 SAVEFREEPV(lex_brackstack);
271 SAVEFREEPV(lex_casestack);
273 *lex_casestack = '\0';
277 SvREFCNT_dec(lex_stuff);
280 SvREFCNT_dec(lex_repl);
285 if (SvREADONLY(linestr))
286 linestr = sv_2mortal(newSVsv(linestr));
287 s = SvPV(linestr, len);
288 if (len && s[len-1] != ';') {
289 if (!(SvFLAGS(linestr) & SVs_TEMP))
290 linestr = sv_2mortal(newSVsv(linestr));
291 sv_catpvn(linestr, "\n;", 2);
294 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
295 bufend = bufptr + SvCUR(linestr);
297 rs = newSVpv("\n", 1);
308 restore_rsfp(void *f)
310 PerlIO *fp = (PerlIO*)f;
312 if (rsfp == PerlIO_stdin())
313 PerlIO_clearerr(rsfp);
314 else if (rsfp && (rsfp != fp))
331 while (*s == ' ' || *s == '\t') s++;
332 if (strnEQ(s, "line ", 5)) {
341 while (*s == ' ' || *s == '\t')
343 if (*s == '"' && (t = strchr(s+1, '"')))
347 return; /* false alarm */
348 for (t = s; !isSPACE(*t); t++) ;
353 curcop->cop_filegv = gv_fetchfile(s);
355 curcop->cop_filegv = gv_fetchfile(origfilename);
357 curcop->cop_line = atoi(n)-1;
361 skipspace(register char *s)
364 if (lex_formbrack && lex_brackets <= lex_formbrack) {
365 while (s < bufend && (*s == ' ' || *s == '\t'))
371 while (s < bufend && isSPACE(*s))
373 if (s < bufend && *s == '#') {
374 while (s < bufend && *s != '\n')
379 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
381 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
382 if (minus_n || minus_p) {
383 sv_setpv(linestr,minus_p ?
384 ";}continue{print or die qq(-p destination: $!\\n)" :
386 sv_catpv(linestr,";}");
387 minus_n = minus_p = 0;
390 sv_setpv(linestr,";");
391 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
392 bufend = SvPVX(linestr) + SvCUR(linestr);
393 if (preprocess && !in_eval)
394 (void)PerlProc_pclose(rsfp);
395 else if ((PerlIO*)rsfp == PerlIO_stdin())
396 PerlIO_clearerr(rsfp);
398 (void)PerlIO_close(rsfp);
404 linestart = bufptr = s + prevlen;
405 bufend = s + SvCUR(linestr);
408 if (PERLDB_LINE && curstash != debstash) {
409 SV *sv = NEWSV(85,0);
411 sv_upgrade(sv, SVt_PVMG);
412 sv_setpvn(sv,bufptr,bufend-bufptr);
413 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
424 if (oldoldbufptr != last_uni)
426 while (isSPACE(*last_uni))
428 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
429 if ((t = strchr(s, '(')) && t < bufptr)
433 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
440 #define UNI(f) return uni(f,s)
448 last_uni = oldbufptr;
459 #endif /* CRIPPLED_CC */
461 #define LOP(f,x) return lop(f,x,s)
466 (I32 f, expectation x, char *s)
472 #endif /* CAN_PROTOTYPE */
479 last_lop = oldbufptr;
495 nexttype[nexttoke] = type;
497 if (lex_state != LEX_KNOWNEXT) {
498 lex_defer = lex_state;
500 lex_state = LEX_KNOWNEXT;
505 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
510 start = skipspace(start);
513 (allow_pack && *s == ':') ||
514 (allow_initial_tick && *s == '\'') )
516 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
517 if (check_keyword && keyword(tokenbuf, len))
519 if (token == METHOD) {
529 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
530 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
537 force_ident(register char *s, int kind)
540 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
541 nextval[nexttoke].opval = o;
544 dTHR; /* just for in_eval */
545 o->op_private = OPpCONST_ENTERED;
546 /* XXX see note in pp_entereval() for why we forgo typo
547 warnings if the symbol must be introduced in an eval.
549 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
550 kind == '$' ? SVt_PV :
551 kind == '@' ? SVt_PVAV :
552 kind == '%' ? SVt_PVHV :
560 force_version(char *s)
562 OP *version = Nullop;
566 /* default VERSION number -- GBARR */
571 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
572 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
574 /* real VERSION number -- GBARR */
575 version = yylval.opval;
579 /* NOTE: The parser sees the package name and the VERSION swapped */
580 nextval[nexttoke].opval = version;
597 s = SvPV_force(sv, len);
601 while (s < send && *s != '\\')
608 if (s + 1 < send && (s[1] == '\\'))
609 s++; /* all that, just for this */
614 SvCUR_set(sv, d - SvPVX(sv));
622 register I32 op_type = yylval.ival;
624 if (op_type == OP_NULL) {
625 yylval.opval = lex_op;
629 if (op_type == OP_CONST || op_type == OP_READLINE) {
630 SV *sv = tokeq(lex_stuff);
632 char *p = SvPV(sv, len);
633 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
639 sublex_info.super_state = lex_state;
640 sublex_info.sub_inwhat = op_type;
641 sublex_info.sub_op = lex_op;
642 lex_state = LEX_INTERPPUSH;
646 yylval.opval = lex_op;
660 lex_state = sublex_info.super_state;
662 SAVEI32(lex_brackets);
663 SAVEI32(lex_fakebrack);
664 SAVEI32(lex_casemods);
669 SAVEI16(curcop->cop_line);
672 SAVEPPTR(oldoldbufptr);
675 SAVEPPTR(lex_brackstack);
676 SAVEPPTR(lex_casestack);
681 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
682 bufend += SvCUR(linestr);
688 New(899, lex_brackstack, 120, char);
689 New(899, lex_casestack, 12, char);
690 SAVEFREEPV(lex_brackstack);
691 SAVEFREEPV(lex_casestack);
693 *lex_casestack = '\0';
695 lex_state = LEX_INTERPCONCAT;
696 curcop->cop_line = multi_start;
698 lex_inwhat = sublex_info.sub_inwhat;
699 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
700 lex_inpat = sublex_info.sub_op;
712 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
716 if (lex_casemods) { /* oops, we've got some unbalanced parens */
717 lex_state = LEX_INTERPCASEMOD;
721 /* Is there a right-hand side to take care of? */
722 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
725 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
726 bufend += SvCUR(linestr);
732 *lex_casestack = '\0';
734 if (SvCOMPILED(lex_repl)) {
735 lex_state = LEX_INTERPNORMAL;
739 lex_state = LEX_INTERPCONCAT;
745 bufend = SvPVX(linestr);
746 bufend += SvCUR(linestr);
753 scan_const(char *start)
755 register char *send = bufend;
756 SV *sv = NEWSV(93, send - start);
757 register char *s = start;
758 register char *d = SvPVX(sv);
759 bool dorange = FALSE;
763 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
764 : (lex_inwhat & OP_TRANS)
768 while (s < send || dorange) {
769 if (lex_inwhat == OP_TRANS) {
774 SvGROW(sv, SvLEN(sv) + 256);
778 for (i = (U8)*d; i <= max; i++)
783 else if (*s == '-' && s+1 < send && s != start) {
788 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
789 while (s < send && *s != ')')
792 else if (*s == '#' && lex_inpat &&
793 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
794 while (s+1 < send && *s != '\n')
797 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
799 else if (*s == '$') {
800 if (!lex_inpat) /* not a regexp, so $ must be var */
802 if (s + 1 < send && !strchr("()| \n\t", s[1]))
803 break; /* in regexp, $ might be tail anchor */
805 if (*s == '\\' && s+1 < send) {
807 if (*s && strchr(leaveit, *s)) {
812 if (lex_inwhat == OP_SUBST && !lex_inpat &&
813 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
816 warn("\\%c better written as $%c", *s, *s);
820 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
826 if (lex_inwhat == OP_TRANS) {
834 case '0': case '1': case '2': case '3':
835 case '4': case '5': case '6': case '7':
836 *d++ = scan_oct(s, 3, &len);
840 *d++ = scan_hex(++s, 2, &len);
876 SvCUR_set(sv, d - SvPVX(sv));
879 if (SvCUR(sv) + 5 < SvLEN(sv)) {
880 SvLEN_set(sv, SvCUR(sv) + 1);
881 Renew(SvPVX(sv), SvLEN(sv), char);
884 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
890 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
892 intuit_more(register char *s)
896 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
898 if (*s != '{' && *s != '[')
903 /* In a pattern, so maybe we have {n,m}. */
920 /* On the other hand, maybe we have a character class */
923 if (*s == ']' || *s == '^')
926 int weight = 2; /* let's weigh the evidence */
928 unsigned char un_char = 0, last_un_char;
929 char *send = strchr(s,']');
930 char tmpbuf[sizeof tokenbuf * 4];
932 if (!send) /* has to be an expression */
938 else if (isDIGIT(*s)) {
940 if (isDIGIT(s[1]) && s[2] == ']')
946 for (; s < send; s++) {
947 last_un_char = un_char;
948 un_char = (unsigned char)*s;
953 weight -= seen[un_char] * 10;
955 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
956 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
961 else if (*s == '$' && s[1] &&
962 strchr("[#!%*<>()-=",s[1])) {
963 if (/*{*/ strchr("])} =",s[2]))
972 if (strchr("wds]",s[1]))
974 else if (seen['\''] || seen['"'])
976 else if (strchr("rnftbxcav",s[1]))
978 else if (isDIGIT(s[1])) {
980 while (s[1] && isDIGIT(s[1]))
990 if (strchr("aA01! ",last_un_char))
992 if (strchr("zZ79~",s[1]))
996 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
997 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1002 if (keyword(tmpbuf, d - tmpbuf))
1005 if (un_char == last_un_char + 1)
1007 weight -= seen[un_char];
1012 if (weight >= 0) /* probably a character class */
1020 intuit_method(char *start, GV *gv)
1022 char *s = start + (*start == '$');
1023 char tmpbuf[sizeof tokenbuf];
1033 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1034 if (*start == '$') {
1035 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1040 return *s == '(' ? FUNCMETH : METHOD;
1042 if (!keyword(tmpbuf, len)) {
1043 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1044 if (indirgv && GvCVu(indirgv))
1046 /* filehandle or package name makes it a method */
1047 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1049 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1050 return 0; /* no assumptions -- "=>" quotes bearword */
1051 nextval[nexttoke].opval =
1052 (OP*)newSVOP(OP_CONST, 0,
1054 nextval[nexttoke].opval->op_private =
1059 return *s == '(' ? FUNCMETH : METHOD;
1069 char *pdb = PerlEnv_getenv("PERL5DB");
1073 SETERRNO(0,SS$_NORMAL);
1074 return "BEGIN { require 'perl5db.pl' }";
1080 /* Encoded script support. filter_add() effectively inserts a
1081 * 'pre-processing' function into the current source input stream.
1082 * Note that the filter function only applies to the current source file
1083 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1085 * The datasv parameter (which may be NULL) can be used to pass
1086 * private data to this instance of the filter. The filter function
1087 * can recover the SV using the FILTER_DATA macro and use it to
1088 * store private buffers and state information.
1090 * The supplied datasv parameter is upgraded to a PVIO type
1091 * and the IoDIRP field is used to store the function pointer.
1092 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1093 * private use must be set using malloc'd pointers.
1095 static int filter_debug = 0;
1098 filter_add(filter_t funcp, SV *datasv)
1100 if (!funcp){ /* temporary handy debugging hack to be deleted */
1101 filter_debug = atoi((char*)datasv);
1105 rsfp_filters = newAV();
1108 if (!SvUPGRADE(datasv, SVt_PVIO))
1109 die("Can't upgrade filter_add data to SVt_PVIO");
1110 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1112 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1113 av_unshift(rsfp_filters, 1);
1114 av_store(rsfp_filters, 0, datasv) ;
1119 /* Delete most recently added instance of this filter function. */
1121 filter_del(filter_t funcp)
1124 warn("filter_del func %p", funcp);
1125 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1127 /* if filter is on top of stack (usual case) just pop it off */
1128 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1129 sv_free(av_pop(rsfp_filters));
1133 /* we need to search for the correct entry and clear it */
1134 die("filter_del can only delete in reverse order (currently)");
1138 /* Invoke the n'th filter function for the current rsfp. */
1140 filter_read(int idx, SV *buf_sv, int maxlen)
1143 /* 0 = read one text line */
1150 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1151 /* Provide a default input filter to make life easy. */
1152 /* Note that we append to the line. This is handy. */
1154 warn("filter_read %d: from rsfp\n", idx);
1158 int old_len = SvCUR(buf_sv) ;
1160 /* ensure buf_sv is large enough */
1161 SvGROW(buf_sv, old_len + maxlen) ;
1162 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1163 if (PerlIO_error(rsfp))
1164 return -1; /* error */
1166 return 0 ; /* end of file */
1168 SvCUR_set(buf_sv, old_len + len) ;
1171 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1172 if (PerlIO_error(rsfp))
1173 return -1; /* error */
1175 return 0 ; /* end of file */
1179 return SvCUR(buf_sv);
1181 /* Skip this filter slot if filter has been deleted */
1182 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1184 warn("filter_read %d: skipped (filter deleted)\n", idx);
1185 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1187 /* Get function pointer hidden within datasv */
1188 funcp = (filter_t)IoDIRP(datasv);
1190 warn("filter_read %d: via function %p (%s)\n",
1191 idx, funcp, SvPV(datasv,na));
1192 /* Call function. The function is expected to */
1193 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1194 /* Return: <0:error, =0:eof, >0:not eof */
1195 return (*funcp)(idx, buf_sv, maxlen);
1200 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1203 if (!rsfp_filters) {
1204 filter_add(win32_textfilter,NULL);
1210 SvCUR_set(sv, 0); /* start with empty line */
1211 if (FILTER_READ(0, sv, 0) > 0)
1212 return ( SvPVX(sv) ) ;
1217 return (sv_gets(sv, fp, append));
1222 static char* exp_name[] =
1223 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1226 EXT int yychar; /* last token */
1239 if (pending_ident) {
1240 char pit = pending_ident;
1244 if (strchr(tokenbuf,':'))
1245 croak(no_myglob,tokenbuf);
1246 yylval.opval = newOP(OP_PADANY, 0);
1247 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1251 if (!strchr(tokenbuf,':')) {
1253 /* Check for single character per-thread SVs */
1254 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1255 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1256 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1258 yylval.opval = newOP(OP_THREADSV, 0);
1259 yylval.opval->op_targ = tmp;
1262 #endif /* USE_THREADS */
1263 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1264 if (last_lop_op == OP_SORT &&
1265 tokenbuf[0] == '$' &&
1266 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1269 for (d = in_eval ? oldoldbufptr : linestart;
1270 d < bufend && *d != '\n';
1273 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1274 croak("Can't use \"my %s\" in sort comparison",
1280 yylval.opval = newOP(OP_PADANY, 0);
1281 yylval.opval->op_targ = tmp;
1286 /* Force them to make up their mind on "@foo". */
1287 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1288 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1289 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1290 yyerror(form("In string, %s now must be written as \\%s",
1291 tokenbuf, tokenbuf));
1294 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1295 yylval.opval->op_private = OPpCONST_ENTERED;
1296 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1297 ((tokenbuf[0] == '$') ? SVt_PV
1298 : (tokenbuf[0] == '@') ? SVt_PVAV
1303 switch (lex_state) {
1305 case LEX_NORMAL: /* Some compilers will produce faster */
1306 case LEX_INTERPNORMAL: /* code if we comment these out. */
1312 yylval = nextval[nexttoke];
1314 lex_state = lex_defer;
1315 expect = lex_expect;
1316 lex_defer = LEX_NORMAL;
1318 return(nexttype[nexttoke]);
1320 case LEX_INTERPCASEMOD:
1322 if (bufptr != bufend && *bufptr != '\\')
1323 croak("panic: INTERPCASEMOD");
1325 if (bufptr == bufend || bufptr[1] == 'E') {
1328 oldmod = lex_casestack[--lex_casemods];
1329 lex_casestack[lex_casemods] = '\0';
1330 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1332 lex_state = LEX_INTERPCONCAT;
1336 if (bufptr != bufend)
1338 lex_state = LEX_INTERPCONCAT;
1343 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1344 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1345 if (strchr("LU", *s) &&
1346 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1348 lex_casestack[--lex_casemods] = '\0';
1351 if (lex_casemods > 10) {
1352 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1353 if (newlb != lex_casestack) {
1355 lex_casestack = newlb;
1358 lex_casestack[lex_casemods++] = *s;
1359 lex_casestack[lex_casemods] = '\0';
1360 lex_state = LEX_INTERPCONCAT;
1361 nextval[nexttoke].ival = 0;
1364 nextval[nexttoke].ival = OP_LCFIRST;
1366 nextval[nexttoke].ival = OP_UCFIRST;
1368 nextval[nexttoke].ival = OP_LC;
1370 nextval[nexttoke].ival = OP_UC;
1372 nextval[nexttoke].ival = OP_QUOTEMETA;
1374 croak("panic: yylex");
1386 case LEX_INTERPPUSH:
1387 return sublex_push();
1389 case LEX_INTERPSTART:
1390 if (bufptr == bufend)
1391 return sublex_done();
1393 lex_dojoin = (*bufptr == '@');
1394 lex_state = LEX_INTERPNORMAL;
1396 nextval[nexttoke].ival = 0;
1399 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1400 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1401 force_next(PRIVATEREF);
1403 force_ident("\"", '$');
1404 #endif /* USE_THREADS */
1405 nextval[nexttoke].ival = 0;
1407 nextval[nexttoke].ival = 0;
1409 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1418 case LEX_INTERPENDMAYBE:
1419 if (intuit_more(bufptr)) {
1420 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1428 lex_state = LEX_INTERPCONCAT;
1432 case LEX_INTERPCONCAT:
1435 croak("panic: INTERPCONCAT");
1437 if (bufptr == bufend)
1438 return sublex_done();
1440 if (SvIVX(linestr) == '\'') {
1441 SV *sv = newSVsv(linestr);
1444 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1448 s = scan_const(bufptr);
1450 lex_state = LEX_INTERPCASEMOD;
1452 lex_state = LEX_INTERPSTART;
1456 nextval[nexttoke] = yylval;
1469 lex_state = LEX_NORMAL;
1470 s = scan_formline(bufptr);
1477 oldoldbufptr = oldbufptr;
1480 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1486 croak("Unrecognized character \\%03o", *s & 255);
1489 goto fake_eof; /* emulate EOF on ^D or ^Z */
1495 yyerror("Missing right bracket");
1499 goto retry; /* ignore stray nulls */
1502 if (!in_eval && !preambled) {
1504 sv_setpv(linestr,incl_perldb());
1506 sv_catpv(linestr,";");
1508 while(AvFILLp(preambleav) >= 0) {
1509 SV *tmpsv = av_shift(preambleav);
1510 sv_catsv(linestr, tmpsv);
1511 sv_catpv(linestr, ";");
1514 sv_free((SV*)preambleav);
1517 if (minus_n || minus_p) {
1518 sv_catpv(linestr, "LINE: while (<>) {");
1520 sv_catpv(linestr,"chomp;");
1522 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1524 GvIMPORTED_AV_on(gv);
1526 if (strchr("/'\"", *splitstr)
1527 && strchr(splitstr + 1, *splitstr))
1528 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1531 s = "'~#\200\1'"; /* surely one char is unused...*/
1532 while (s[1] && strchr(splitstr, *s)) s++;
1534 sv_catpvf(linestr, "@F=split(%s%c",
1535 "q" + (delim == '\''), delim);
1536 for (s = splitstr; *s; s++) {
1538 sv_catpvn(linestr, "\\", 1);
1539 sv_catpvn(linestr, s, 1);
1541 sv_catpvf(linestr, "%c);", delim);
1545 sv_catpv(linestr,"@F=split(' ');");
1548 sv_catpv(linestr, "\n");
1549 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1550 bufend = SvPVX(linestr) + SvCUR(linestr);
1551 if (PERLDB_LINE && curstash != debstash) {
1552 SV *sv = NEWSV(85,0);
1554 sv_upgrade(sv, SVt_PVMG);
1555 sv_setsv(sv,linestr);
1556 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1561 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1564 if (preprocess && !in_eval)
1565 (void)PerlProc_pclose(rsfp);
1566 else if ((PerlIO *)rsfp == PerlIO_stdin())
1567 PerlIO_clearerr(rsfp);
1569 (void)PerlIO_close(rsfp);
1574 if (!in_eval && (minus_n || minus_p)) {
1575 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1576 sv_catpv(linestr,";}");
1577 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1578 bufend = SvPVX(linestr) + SvCUR(linestr);
1579 minus_n = minus_p = 0;
1582 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1583 sv_setpv(linestr,"");
1584 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1587 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1590 /* Incest with pod. */
1591 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1592 sv_setpv(linestr, "");
1593 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1594 bufend = SvPVX(linestr) + SvCUR(linestr);
1599 } while (doextract);
1600 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1601 if (PERLDB_LINE && curstash != debstash) {
1602 SV *sv = NEWSV(85,0);
1604 sv_upgrade(sv, SVt_PVMG);
1605 sv_setsv(sv,linestr);
1606 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1608 bufend = SvPVX(linestr) + SvCUR(linestr);
1609 if (curcop->cop_line == 1) {
1610 while (s < bufend && isSPACE(*s))
1612 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1616 if (*s == '#' && *(s+1) == '!')
1618 #ifdef ALTERNATE_SHEBANG
1620 static char as[] = ALTERNATE_SHEBANG;
1621 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1622 d = s + (sizeof(as) - 1);
1624 #endif /* ALTERNATE_SHEBANG */
1633 while (*d && !isSPACE(*d))
1637 #ifdef ARG_ZERO_IS_SCRIPT
1638 if (ipathend > ipath) {
1640 * HP-UX (at least) sets argv[0] to the script name,
1641 * which makes $^X incorrect. And Digital UNIX and Linux,
1642 * at least, set argv[0] to the basename of the Perl
1643 * interpreter. So, having found "#!", we'll set it right.
1645 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1646 assert(SvPOK(x) || SvGMAGICAL(x));
1647 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1648 sv_setpvn(x, ipath, ipathend - ipath);
1651 TAINT_NOT; /* $^X is always tainted, but that's OK */
1653 #endif /* ARG_ZERO_IS_SCRIPT */
1658 d = instr(s,"perl -");
1660 d = instr(s,"perl");
1661 #ifdef ALTERNATE_SHEBANG
1663 * If the ALTERNATE_SHEBANG on this system starts with a
1664 * character that can be part of a Perl expression, then if
1665 * we see it but not "perl", we're probably looking at the
1666 * start of Perl code, not a request to hand off to some
1667 * other interpreter. Similarly, if "perl" is there, but
1668 * not in the first 'word' of the line, we assume the line
1669 * contains the start of the Perl program.
1671 if (d && *s != '#') {
1673 while (*c && !strchr("; \t\r\n\f\v#", *c))
1676 d = Nullch; /* "perl" not in first word; ignore */
1678 *s = '#'; /* Don't try to parse shebang line */
1680 #endif /* ALTERNATE_SHEBANG */
1685 !instr(s,"indir") &&
1686 instr(origargv[0],"perl"))
1692 while (s < bufend && isSPACE(*s))
1695 Newz(899,newargv,origargc+3,char*);
1697 while (s < bufend && !isSPACE(*s))
1700 Copy(origargv+1, newargv+2, origargc+1, char*);
1705 execv(ipath, newargv);
1706 croak("Can't exec %s", ipath);
1709 U32 oldpdb = perldb;
1710 bool oldn = minus_n;
1711 bool oldp = minus_p;
1713 while (*d && !isSPACE(*d)) d++;
1714 while (*d == ' ' || *d == '\t') d++;
1718 if (*d == 'M' || *d == 'm') {
1720 while (*d && !isSPACE(*d)) d++;
1721 croak("Too late for \"-%.*s\" option",
1724 d = moreswitches(d);
1726 if (PERLDB_LINE && !oldpdb ||
1727 ( minus_n || minus_p ) && !(oldn || oldp) )
1728 /* if we have already added "LINE: while (<>) {",
1729 we must not do it again */
1731 sv_setpv(linestr, "");
1732 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1733 bufend = SvPVX(linestr) + SvCUR(linestr);
1736 (void)gv_fetchfile(origfilename);
1743 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1745 lex_state = LEX_FORMLINE;
1751 warn("Illegal character \\%03o (carriage return)", '\r');
1753 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1755 case ' ': case '\t': case '\f': case 013:
1760 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1762 while (s < d && *s != '\n')
1767 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1769 lex_state = LEX_FORMLINE;
1779 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1784 while (s < bufend && (*s == ' ' || *s == '\t'))
1787 if (strnEQ(s,"=>",2)) {
1789 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1790 (int)tmp, (int)tmp);
1791 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1792 OPERATOR('-'); /* unary minus */
1794 last_uni = oldbufptr;
1795 last_lop_op = OP_FTEREAD; /* good enough */
1797 case 'r': FTST(OP_FTEREAD);
1798 case 'w': FTST(OP_FTEWRITE);
1799 case 'x': FTST(OP_FTEEXEC);
1800 case 'o': FTST(OP_FTEOWNED);
1801 case 'R': FTST(OP_FTRREAD);
1802 case 'W': FTST(OP_FTRWRITE);
1803 case 'X': FTST(OP_FTREXEC);
1804 case 'O': FTST(OP_FTROWNED);
1805 case 'e': FTST(OP_FTIS);
1806 case 'z': FTST(OP_FTZERO);
1807 case 's': FTST(OP_FTSIZE);
1808 case 'f': FTST(OP_FTFILE);
1809 case 'd': FTST(OP_FTDIR);
1810 case 'l': FTST(OP_FTLINK);
1811 case 'p': FTST(OP_FTPIPE);
1812 case 'S': FTST(OP_FTSOCK);
1813 case 'u': FTST(OP_FTSUID);
1814 case 'g': FTST(OP_FTSGID);
1815 case 'k': FTST(OP_FTSVTX);
1816 case 'b': FTST(OP_FTBLK);
1817 case 'c': FTST(OP_FTCHR);
1818 case 't': FTST(OP_FTTTY);
1819 case 'T': FTST(OP_FTTEXT);
1820 case 'B': FTST(OP_FTBINARY);
1821 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1822 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1823 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1825 croak("Unrecognized file test: -%c", (int)tmp);
1832 if (expect == XOPERATOR)
1837 else if (*s == '>') {
1840 if (isIDFIRST(*s)) {
1841 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1849 if (expect == XOPERATOR)
1852 if (isSPACE(*s) || !isSPACE(*bufptr))
1854 OPERATOR('-'); /* unary minus */
1861 if (expect == XOPERATOR)
1866 if (expect == XOPERATOR)
1869 if (isSPACE(*s) || !isSPACE(*bufptr))
1875 if (expect != XOPERATOR) {
1876 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1878 force_ident(tokenbuf, '*');
1891 if (expect == XOPERATOR) {
1896 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1899 yyerror("Final % should be \\% or %name");
1902 pending_ident = '%';
1924 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1925 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1930 if (curcop->cop_line < copline)
1931 copline = curcop->cop_line;
1942 if (lex_brackets <= 0)
1943 yyerror("Unmatched right bracket");
1946 if (lex_state == LEX_INTERPNORMAL) {
1947 if (lex_brackets == 0) {
1948 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1949 lex_state = LEX_INTERPEND;
1956 if (lex_brackets > 100) {
1957 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1958 if (newlb != lex_brackstack) {
1960 lex_brackstack = newlb;
1965 if (lex_formbrack) {
1969 if (oldoldbufptr == last_lop)
1970 lex_brackstack[lex_brackets++] = XTERM;
1972 lex_brackstack[lex_brackets++] = XOPERATOR;
1973 OPERATOR(HASHBRACK);
1975 while (s < bufend && (*s == ' ' || *s == '\t'))
1979 if (d < bufend && *d == '-') {
1982 while (d < bufend && (*d == ' ' || *d == '\t'))
1985 if (d < bufend && isIDFIRST(*d)) {
1986 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
1988 while (d < bufend && (*d == ' ' || *d == '\t'))
1991 char minus = (tokenbuf[0] == '-');
1993 (keyword(tokenbuf + 1, len) ||
1994 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
1995 perl_get_cv(tokenbuf + 1, FALSE) ))
1996 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
1997 tokenbuf + !minus, tokenbuf + !minus);
1998 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2005 lex_brackstack[lex_brackets++] = XSTATE;
2009 lex_brackstack[lex_brackets++] = XOPERATOR;
2014 if (oldoldbufptr == last_lop)
2015 lex_brackstack[lex_brackets++] = XTERM;
2017 lex_brackstack[lex_brackets++] = XOPERATOR;
2020 OPERATOR(HASHBRACK);
2021 /* This hack serves to disambiguate a pair of curlies
2022 * as being a block or an anon hash. Normally, expectation
2023 * determines that, but in cases where we're not in a
2024 * position to expect anything in particular (like inside
2025 * eval"") we have to resolve the ambiguity. This code
2026 * covers the case where the first term in the curlies is a
2027 * quoted string. Most other cases need to be explicitly
2028 * disambiguated by prepending a `+' before the opening
2029 * curly in order to force resolution as an anon hash.
2031 * XXX should probably propagate the outer expectation
2032 * into eval"" to rely less on this hack, but that could
2033 * potentially break current behavior of eval"".
2037 if (*s == '\'' || *s == '"' || *s == '`') {
2038 /* common case: get past first string, handling escapes */
2039 for (t++; t < bufend && *t != *s;)
2040 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2044 else if (*s == 'q') {
2047 || ((*t == 'q' || *t == 'x') && ++t < bufend
2048 && !isALNUM(*t)))) {
2050 char open, close, term;
2053 while (t < bufend && isSPACE(*t))
2057 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2061 for (t++; t < bufend; t++) {
2062 if (*t == '\\' && t+1 < bufend && open != '\\')
2064 else if (*t == open)
2068 for (t++; t < bufend; t++) {
2069 if (*t == '\\' && t+1 < bufend)
2071 else if (*t == close && --brackets <= 0)
2073 else if (*t == open)
2079 else if (isALPHA(*s)) {
2080 for (t++; t < bufend && isALNUM(*t); t++) ;
2082 while (t < bufend && isSPACE(*t))
2084 /* if comma follows first term, call it an anon hash */
2085 /* XXX it could be a comma expression with loop modifiers */
2086 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2087 || (*t == '=' && t[1] == '>')))
2088 OPERATOR(HASHBRACK);
2092 lex_brackstack[lex_brackets-1] = XSTATE;
2098 yylval.ival = curcop->cop_line;
2099 if (isSPACE(*s) || *s == '#')
2100 copline = NOLINE; /* invalidate current command line number */
2105 if (lex_brackets <= 0)
2106 yyerror("Unmatched right bracket");
2108 expect = (expectation)lex_brackstack[--lex_brackets];
2109 if (lex_brackets < lex_formbrack)
2111 if (lex_state == LEX_INTERPNORMAL) {
2112 if (lex_brackets == 0) {
2113 if (lex_fakebrack) {
2114 lex_state = LEX_INTERPEND;
2116 return yylex(); /* ignore fake brackets */
2118 if (*s == '-' && s[1] == '>')
2119 lex_state = LEX_INTERPENDMAYBE;
2120 else if (*s != '[' && *s != '{')
2121 lex_state = LEX_INTERPEND;
2124 if (lex_brackets < lex_fakebrack) {
2127 return yylex(); /* ignore fake brackets */
2137 if (expect == XOPERATOR) {
2138 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2146 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2149 force_ident(tokenbuf, '&');
2153 yylval.ival = (OPpENTERSUB_AMPER<<8);
2172 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2173 warn("Reversed %c= operator",(int)tmp);
2175 if (expect == XSTATE && isALPHA(tmp) &&
2176 (s == linestart+1 || s[-2] == '\n') )
2178 if (in_eval && !rsfp) {
2183 if (strnEQ(s,"=cut",4)) {
2200 if (lex_brackets < lex_formbrack) {
2202 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2203 if (*t == '\n' || *t == '#') {
2221 if (expect != XOPERATOR) {
2222 if (s[1] != '<' && !strchr(s,'>'))
2225 s = scan_heredoc(s);
2227 s = scan_inputsymbol(s);
2228 TERM(sublex_start());
2233 SHop(OP_LEFT_SHIFT);
2247 SHop(OP_RIGHT_SHIFT);
2256 if (expect == XOPERATOR) {
2257 if (lex_formbrack && lex_brackets == lex_formbrack) {
2260 return ','; /* grandfather non-comma-format format */
2264 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2265 if (expect == XOPERATOR)
2266 no_op("Array length", bufptr);
2268 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2273 pending_ident = '#';
2277 if (expect == XOPERATOR)
2278 no_op("Scalar", bufptr);
2280 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2283 yyerror("Final $ should be \\$ or $name");
2287 /* This kludge not intended to be bulletproof. */
2288 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2289 yylval.opval = newSVOP(OP_CONST, 0,
2290 newSViv((IV)compiling.cop_arybase));
2291 yylval.opval->op_private = OPpCONST_ARYBASE;
2296 if (lex_state == LEX_NORMAL)
2299 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2305 isSPACE(*t) || isALNUM(*t) || *t == '$';
2308 bufptr = skipspace(bufptr);
2309 while (t < bufend && *t != ']')
2311 warn("Multidimensional syntax %.*s not supported",
2312 (t - bufptr) + 1, bufptr);
2316 else if (*s == '{') {
2318 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2319 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2321 char tmpbuf[sizeof tokenbuf];
2323 for (t++; isSPACE(*t); t++) ;
2324 if (isIDFIRST(*t)) {
2325 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2326 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2327 warn("You need to quote \"%s\"", tmpbuf);
2334 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2335 bool islop = (last_lop == oldoldbufptr);
2336 if (!islop || last_lop_op == OP_GREPSTART)
2338 else if (strchr("$@\"'`q", *s))
2339 expect = XTERM; /* e.g. print $fh "foo" */
2340 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2341 expect = XTERM; /* e.g. print $fh &sub */
2342 else if (isIDFIRST(*s)) {
2343 char tmpbuf[sizeof tokenbuf];
2344 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2345 if (tmp = keyword(tmpbuf, len)) {
2346 /* binary operators exclude handle interpretations */
2358 expect = XTERM; /* e.g. print $fh length() */
2363 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2364 if (gv && GvCVu(gv))
2365 expect = XTERM; /* e.g. print $fh subr() */
2368 else if (isDIGIT(*s))
2369 expect = XTERM; /* e.g. print $fh 3 */
2370 else if (*s == '.' && isDIGIT(s[1]))
2371 expect = XTERM; /* e.g. print $fh .3 */
2372 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2373 expect = XTERM; /* e.g. print $fh -1 */
2374 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2375 expect = XTERM; /* print $fh <<"EOF" */
2377 pending_ident = '$';
2381 if (expect == XOPERATOR)
2384 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2387 yyerror("Final @ should be \\@ or @name");
2390 if (lex_state == LEX_NORMAL)
2392 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2396 /* Warn about @ where they meant $. */
2398 if (*s == '[' || *s == '{') {
2400 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2402 if (*t == '}' || *t == ']') {
2404 bufptr = skipspace(bufptr);
2405 warn("Scalar value %.*s better written as $%.*s",
2406 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2411 pending_ident = '@';
2414 case '/': /* may either be division or pattern */
2415 case '?': /* may either be conditional or pattern */
2416 if (expect != XOPERATOR) {
2417 /* Disable warning on "study /blah/" */
2418 if (oldoldbufptr == last_uni
2419 && (*last_uni != 's' || s - last_uni < 5
2420 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2423 TERM(sublex_start());
2431 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2432 (s == linestart || s[-1] == '\n') ) {
2437 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2443 yylval.ival = OPf_SPECIAL;
2449 if (expect != XOPERATOR)
2454 case '0': case '1': case '2': case '3': case '4':
2455 case '5': case '6': case '7': case '8': case '9':
2457 if (expect == XOPERATOR)
2463 if (expect == XOPERATOR) {
2464 if (lex_formbrack && lex_brackets == lex_formbrack) {
2467 return ','; /* grandfather non-comma-format format */
2473 missingterm((char*)0);
2474 yylval.ival = OP_CONST;
2475 TERM(sublex_start());
2479 if (expect == XOPERATOR) {
2480 if (lex_formbrack && lex_brackets == lex_formbrack) {
2483 return ','; /* grandfather non-comma-format format */
2489 missingterm((char*)0);
2490 yylval.ival = OP_CONST;
2491 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2492 if (*d == '$' || *d == '@' || *d == '\\') {
2493 yylval.ival = OP_STRINGIFY;
2497 TERM(sublex_start());
2501 if (expect == XOPERATOR)
2502 no_op("Backticks",s);
2504 missingterm((char*)0);
2505 yylval.ival = OP_BACKTICK;
2507 TERM(sublex_start());
2511 if (dowarn && lex_inwhat && isDIGIT(*s))
2512 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2513 if (expect == XOPERATOR)
2514 no_op("Backslash",s);
2518 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2557 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2559 /* Some keywords can be followed by any delimiter, including ':' */
2560 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2561 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2562 (tokenbuf[0] == 'q' &&
2563 strchr("qwx", tokenbuf[1]))));
2565 /* x::* is just a word, unless x is "CORE" */
2566 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2570 while (d < bufend && isSPACE(*d))
2571 d++; /* no comments skipped here, or s### is misparsed */
2573 /* Is this a label? */
2574 if (!tmp && expect == XSTATE
2575 && d < bufend && *d == ':' && *(d + 1) != ':') {
2577 yylval.pval = savepv(tokenbuf);
2582 /* Check for keywords */
2583 tmp = keyword(tokenbuf, len);
2585 /* Is this a word before a => operator? */
2586 if (strnEQ(d,"=>",2)) {
2588 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2589 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2590 tokenbuf, tokenbuf);
2591 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2592 yylval.opval->op_private = OPpCONST_BARE;
2596 if (tmp < 0) { /* second-class keyword? */
2597 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2598 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2599 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2600 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2601 (gv = *gvp) != (GV*)&sv_undef &&
2602 GvCVu(gv) && GvIMPORTED_CV(gv))))
2604 tmp = 0; /* overridden by importation */
2607 && -tmp==KEY_lock /* XXX generalizable kludge */
2608 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2610 tmp = 0; /* any sub overrides "weak" keyword */
2613 tmp = -tmp; gv = Nullgv; gvp = 0;
2620 default: /* not a keyword */
2623 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2625 /* Get the rest if it looks like a package qualifier */
2627 if (*s == '\'' || *s == ':' && s[1] == ':') {
2628 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2631 croak("Bad name after %s::", tokenbuf);
2634 if (expect == XOPERATOR) {
2635 if (bufptr == linestart) {
2641 no_op("Bareword",s);
2644 /* Look for a subroutine with this name in current package. */
2647 sv = newSVpv("CORE::GLOBAL::",14);
2648 sv_catpv(sv,tokenbuf);
2651 sv = newSVpv(tokenbuf,0);
2653 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2655 /* Presume this is going to be a bareword of some sort. */
2658 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2659 yylval.opval->op_private = OPpCONST_BARE;
2661 /* See if it's the indirect object for a list operator. */
2664 oldoldbufptr < bufptr &&
2665 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2666 /* NO SKIPSPACE BEFORE HERE! */
2668 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2670 bool immediate_paren = *s == '(';
2672 /* (Now we can afford to cross potential line boundary.) */
2675 /* Two barewords in a row may indicate method call. */
2677 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2680 /* If not a declared subroutine, it's an indirect object. */
2681 /* (But it's an indir obj regardless for sort.) */
2683 if ((last_lop_op == OP_SORT ||
2684 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2685 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2686 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2691 /* If followed by a paren, it's certainly a subroutine. */
2697 if (gv && GvCVu(gv)) {
2698 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2699 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2704 nextval[nexttoke].opval = yylval.opval;
2711 /* If followed by var or block, call it a method (unless sub) */
2713 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2714 last_lop = oldbufptr;
2715 last_lop_op = OP_METHOD;
2719 /* If followed by a bareword, see if it looks like indir obj. */
2721 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2724 /* Not a method, so call it a subroutine (if defined) */
2726 if (gv && GvCVu(gv)) {
2728 if (lastchar == '-')
2729 warn("Ambiguous use of -%s resolved as -&%s()",
2730 tokenbuf, tokenbuf);
2731 last_lop = oldbufptr;
2732 last_lop_op = OP_ENTERSUB;
2733 /* Check for a constant sub */
2735 if ((sv = cv_const_sv(cv))) {
2737 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2738 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2739 yylval.opval->op_private = 0;
2743 /* Resolve to GV now. */
2744 op_free(yylval.opval);
2745 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2746 /* Is there a prototype? */
2749 char *proto = SvPV((SV*)cv, len);
2752 if (strEQ(proto, "$"))
2754 if (*proto == '&' && *s == '{') {
2755 sv_setpv(subname,"__ANON__");
2759 nextval[nexttoke].opval = yylval.opval;
2765 if (hints & HINT_STRICT_SUBS &&
2768 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2769 last_lop_op != OP_ACCEPT &&
2770 last_lop_op != OP_PIPE_OP &&
2771 last_lop_op != OP_SOCKPAIR)
2774 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2779 /* Call it a bare word */
2783 if (lastchar != '-') {
2784 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2786 warn(warn_reserved, tokenbuf);
2789 if (lastchar && strchr("*%&", lastchar)) {
2790 warn("Operator or semicolon missing before %c%s",
2791 lastchar, tokenbuf);
2792 warn("Ambiguous use of %c resolved as operator %c",
2793 lastchar, lastchar);
2799 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2800 newSVsv(GvSV(curcop->cop_filegv)));
2804 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2805 newSVpvf("%ld", (long)curcop->cop_line));
2808 case KEY___PACKAGE__:
2809 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2811 ? newSVsv(curstname)
2820 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2821 char *pname = "main";
2822 if (tokenbuf[2] == 'D')
2823 pname = HvNAME(curstash ? curstash : defstash);
2824 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2827 GvIOp(gv) = newIO();
2828 IoIFP(GvIOp(gv)) = rsfp;
2829 #if defined(HAS_FCNTL) && defined(F_SETFD)
2831 int fd = PerlIO_fileno(rsfp);
2832 fcntl(fd,F_SETFD,fd >= 3);
2835 /* Mark this internal pseudo-handle as clean */
2836 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2838 IoTYPE(GvIOp(gv)) = '|';
2839 else if ((PerlIO*)rsfp == PerlIO_stdin())
2840 IoTYPE(GvIOp(gv)) = '-';
2842 IoTYPE(GvIOp(gv)) = '<';
2853 if (expect == XSTATE) {
2860 if (*s == ':' && s[1] == ':') {
2863 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2864 tmp = keyword(tokenbuf, len);
2878 LOP(OP_ACCEPT,XTERM);
2884 LOP(OP_ATAN2,XTERM);
2893 LOP(OP_BLESS,XTERM);
2902 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2922 LOP(OP_CRYPT,XTERM);
2926 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2927 if (*d != '0' && isDIGIT(*d))
2928 yywarn("chmod: mode argument is missing initial 0");
2930 LOP(OP_CHMOD,XTERM);
2933 LOP(OP_CHOWN,XTERM);
2936 LOP(OP_CONNECT,XTERM);
2952 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2956 hints |= HINT_BLOCK_SCOPE;
2966 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2967 LOP(OP_DBMOPEN,XTERM);
2973 s = force_word(s,WORD,TRUE,FALSE,FALSE);
2980 yylval.ival = curcop->cop_line;
2994 expect = (*s == '{') ? XTERMBLOCK : XTERM;
2995 UNIBRACK(OP_ENTEREVAL);
3010 case KEY_endhostent:
3016 case KEY_endservent:
3019 case KEY_endprotoent:
3030 yylval.ival = curcop->cop_line;
3032 if (isIDFIRST(*s)) {
3034 if ((bufend - p) >= 3 &&
3035 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3039 croak("Missing $ on loop variable");
3044 LOP(OP_FORMLINE,XTERM);
3050 LOP(OP_FCNTL,XTERM);
3056 LOP(OP_FLOCK,XTERM);
3065 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3068 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3083 case KEY_getpriority:
3084 LOP(OP_GETPRIORITY,XTERM);
3086 case KEY_getprotobyname:
3089 case KEY_getprotobynumber:
3090 LOP(OP_GPBYNUMBER,XTERM);
3092 case KEY_getprotoent:
3104 case KEY_getpeername:
3105 UNI(OP_GETPEERNAME);
3107 case KEY_gethostbyname:
3110 case KEY_gethostbyaddr:
3111 LOP(OP_GHBYADDR,XTERM);
3113 case KEY_gethostent:
3116 case KEY_getnetbyname:
3119 case KEY_getnetbyaddr:
3120 LOP(OP_GNBYADDR,XTERM);
3125 case KEY_getservbyname:
3126 LOP(OP_GSBYNAME,XTERM);
3128 case KEY_getservbyport:
3129 LOP(OP_GSBYPORT,XTERM);
3131 case KEY_getservent:
3134 case KEY_getsockname:
3135 UNI(OP_GETSOCKNAME);
3137 case KEY_getsockopt:
3138 LOP(OP_GSOCKOPT,XTERM);
3160 yylval.ival = curcop->cop_line;
3164 LOP(OP_INDEX,XTERM);
3170 LOP(OP_IOCTL,XTERM);
3182 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3213 LOP(OP_LISTEN,XTERM);
3223 TERM(sublex_start());
3226 LOP(OP_MAPSTART,XREF);
3229 LOP(OP_MKDIR,XTERM);
3232 LOP(OP_MSGCTL,XTERM);
3235 LOP(OP_MSGGET,XTERM);
3238 LOP(OP_MSGRCV,XTERM);
3241 LOP(OP_MSGSND,XTERM);
3246 if (isIDFIRST(*s)) {
3247 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3248 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3252 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3259 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3266 if (expect != XSTATE)
3267 yyerror("\"no\" not allowed in expression");
3268 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3269 s = force_version(s);
3278 if (isIDFIRST(*s)) {
3280 for (d = s; isALNUM(*d); d++) ;
3282 if (strchr("|&*+-=!?:.", *t))
3283 warn("Precedence problem: open %.*s should be open(%.*s)",
3289 yylval.ival = OP_OR;
3299 LOP(OP_OPEN_DIR,XTERM);
3302 checkcomma(s,tokenbuf,"filehandle");
3306 checkcomma(s,tokenbuf,"filehandle");
3325 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3329 LOP(OP_PIPE_OP,XTERM);
3334 missingterm((char*)0);
3335 yylval.ival = OP_CONST;
3336 TERM(sublex_start());
3344 missingterm((char*)0);
3345 if (dowarn && SvLEN(lex_stuff)) {
3346 d = SvPV_force(lex_stuff, len);
3347 for (; len; --len, ++d) {
3349 warn("Possible attempt to separate words with commas");
3353 warn("Possible attempt to put comments in qw() list");
3359 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, tokeq(lex_stuff));
3363 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3366 yylval.ival = OP_SPLIT;
3370 last_lop = oldbufptr;
3371 last_lop_op = OP_SPLIT;
3377 missingterm((char*)0);
3378 yylval.ival = OP_STRINGIFY;
3379 if (SvIVX(lex_stuff) == '\'')
3380 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3381 TERM(sublex_start());
3386 missingterm((char*)0);
3387 yylval.ival = OP_BACKTICK;
3389 TERM(sublex_start());
3396 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3397 if (isIDFIRST(*tokenbuf))
3398 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3400 yyerror("<> should be quotes");
3407 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3411 LOP(OP_RENAME,XTERM);
3420 LOP(OP_RINDEX,XTERM);
3443 LOP(OP_REVERSE,XTERM);
3454 TERM(sublex_start());
3456 TOKEN(1); /* force error */
3465 LOP(OP_SELECT,XTERM);
3471 LOP(OP_SEMCTL,XTERM);
3474 LOP(OP_SEMGET,XTERM);
3477 LOP(OP_SEMOP,XTERM);
3483 LOP(OP_SETPGRP,XTERM);
3485 case KEY_setpriority:
3486 LOP(OP_SETPRIORITY,XTERM);
3488 case KEY_sethostent:
3494 case KEY_setservent:
3497 case KEY_setprotoent:
3507 LOP(OP_SEEKDIR,XTERM);
3509 case KEY_setsockopt:
3510 LOP(OP_SSOCKOPT,XTERM);
3516 LOP(OP_SHMCTL,XTERM);
3519 LOP(OP_SHMGET,XTERM);
3522 LOP(OP_SHMREAD,XTERM);
3525 LOP(OP_SHMWRITE,XTERM);
3528 LOP(OP_SHUTDOWN,XTERM);
3537 LOP(OP_SOCKET,XTERM);
3539 case KEY_socketpair:
3540 LOP(OP_SOCKPAIR,XTERM);
3543 checkcomma(s,tokenbuf,"subroutine name");
3545 if (*s == ';' || *s == ')') /* probably a close */
3546 croak("sort is now a reserved word");
3548 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3552 LOP(OP_SPLIT,XTERM);
3555 LOP(OP_SPRINTF,XTERM);
3558 LOP(OP_SPLICE,XTERM);
3574 LOP(OP_SUBSTR,XTERM);
3581 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3582 char tmpbuf[sizeof tokenbuf];
3584 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3585 if (strchr(tmpbuf, ':'))
3586 sv_setpv(subname, tmpbuf);
3588 sv_setsv(subname,curstname);
3589 sv_catpvn(subname,"::",2);
3590 sv_catpvn(subname,tmpbuf,len);
3592 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3596 expect = XTERMBLOCK;
3597 sv_setpv(subname,"?");
3600 if (tmp == KEY_format) {
3603 lex_formbrack = lex_brackets + 1;
3607 /* Look for a prototype */
3614 SvREFCNT_dec(lex_stuff);
3616 croak("Prototype not terminated");
3619 d = SvPVX(lex_stuff);
3621 for (p = d; *p; ++p) {
3626 SvCUR(lex_stuff) = tmp;
3629 nextval[1] = nextval[0];
3630 nexttype[1] = nexttype[0];
3631 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3632 nexttype[0] = THING;
3633 if (nexttoke == 1) {
3634 lex_defer = lex_state;
3635 lex_expect = expect;
3636 lex_state = LEX_KNOWNEXT;
3641 if (*SvPV(subname,na) == '?') {
3642 sv_setpv(subname,"__ANON__");
3649 LOP(OP_SYSTEM,XREF);
3652 LOP(OP_SYMLINK,XTERM);
3655 LOP(OP_SYSCALL,XTERM);
3658 LOP(OP_SYSOPEN,XTERM);
3661 LOP(OP_SYSSEEK,XTERM);
3664 LOP(OP_SYSREAD,XTERM);
3667 LOP(OP_SYSWRITE,XTERM);
3671 TERM(sublex_start());
3692 LOP(OP_TRUNCATE,XTERM);
3704 yylval.ival = curcop->cop_line;
3708 yylval.ival = curcop->cop_line;
3712 LOP(OP_UNLINK,XTERM);
3718 LOP(OP_UNPACK,XTERM);
3721 LOP(OP_UTIME,XTERM);
3725 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3726 if (*d != '0' && isDIGIT(*d))
3727 yywarn("umask: argument is missing initial 0");
3732 LOP(OP_UNSHIFT,XTERM);
3735 if (expect != XSTATE)
3736 yyerror("\"use\" not allowed in expression");
3739 s = force_version(s);
3740 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3741 nextval[nexttoke].opval = Nullop;
3746 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3747 s = force_version(s);
3760 yylval.ival = curcop->cop_line;
3764 hints |= HINT_BLOCK_SCOPE;
3771 LOP(OP_WAITPID,XTERM);
3777 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3781 if (expect == XOPERATOR)
3787 yylval.ival = OP_XOR;
3792 TERM(sublex_start());
3798 keyword(register char *d, I32 len)
3803 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3804 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3805 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3806 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3807 if (strEQ(d,"__END__")) return KEY___END__;
3811 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3816 if (strEQ(d,"and")) return -KEY_and;
3817 if (strEQ(d,"abs")) return -KEY_abs;
3820 if (strEQ(d,"alarm")) return -KEY_alarm;
3821 if (strEQ(d,"atan2")) return -KEY_atan2;
3824 if (strEQ(d,"accept")) return -KEY_accept;
3829 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3832 if (strEQ(d,"bless")) return -KEY_bless;
3833 if (strEQ(d,"bind")) return -KEY_bind;
3834 if (strEQ(d,"binmode")) return -KEY_binmode;
3837 if (strEQ(d,"CORE")) return -KEY_CORE;
3842 if (strEQ(d,"cmp")) return -KEY_cmp;
3843 if (strEQ(d,"chr")) return -KEY_chr;
3844 if (strEQ(d,"cos")) return -KEY_cos;
3847 if (strEQ(d,"chop")) return KEY_chop;
3850 if (strEQ(d,"close")) return -KEY_close;
3851 if (strEQ(d,"chdir")) return -KEY_chdir;
3852 if (strEQ(d,"chomp")) return KEY_chomp;
3853 if (strEQ(d,"chmod")) return -KEY_chmod;
3854 if (strEQ(d,"chown")) return -KEY_chown;
3855 if (strEQ(d,"crypt")) return -KEY_crypt;
3858 if (strEQ(d,"chroot")) return -KEY_chroot;
3859 if (strEQ(d,"caller")) return -KEY_caller;
3862 if (strEQ(d,"connect")) return -KEY_connect;
3865 if (strEQ(d,"closedir")) return -KEY_closedir;
3866 if (strEQ(d,"continue")) return -KEY_continue;
3871 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3876 if (strEQ(d,"do")) return KEY_do;
3879 if (strEQ(d,"die")) return -KEY_die;
3882 if (strEQ(d,"dump")) return -KEY_dump;
3885 if (strEQ(d,"delete")) return KEY_delete;
3888 if (strEQ(d,"defined")) return KEY_defined;
3889 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3892 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3897 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3898 if (strEQ(d,"END")) return KEY_END;
3903 if (strEQ(d,"eq")) return -KEY_eq;
3906 if (strEQ(d,"eof")) return -KEY_eof;
3907 if (strEQ(d,"exp")) return -KEY_exp;
3910 if (strEQ(d,"else")) return KEY_else;
3911 if (strEQ(d,"exit")) return -KEY_exit;
3912 if (strEQ(d,"eval")) return KEY_eval;
3913 if (strEQ(d,"exec")) return -KEY_exec;
3914 if (strEQ(d,"each")) return KEY_each;
3917 if (strEQ(d,"elsif")) return KEY_elsif;
3920 if (strEQ(d,"exists")) return KEY_exists;
3921 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3924 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3925 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3928 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3931 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3932 if (strEQ(d,"endservent")) return -KEY_endservent;
3935 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3942 if (strEQ(d,"for")) return KEY_for;
3945 if (strEQ(d,"fork")) return -KEY_fork;
3948 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3949 if (strEQ(d,"flock")) return -KEY_flock;
3952 if (strEQ(d,"format")) return KEY_format;
3953 if (strEQ(d,"fileno")) return -KEY_fileno;
3956 if (strEQ(d,"foreach")) return KEY_foreach;
3959 if (strEQ(d,"formline")) return -KEY_formline;
3965 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3966 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
3970 if (strnEQ(d,"get",3)) {
3975 if (strEQ(d,"ppid")) return -KEY_getppid;
3976 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
3979 if (strEQ(d,"pwent")) return -KEY_getpwent;
3980 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
3981 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
3984 if (strEQ(d,"peername")) return -KEY_getpeername;
3985 if (strEQ(d,"protoent")) return -KEY_getprotoent;
3986 if (strEQ(d,"priority")) return -KEY_getpriority;
3989 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
3992 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
3996 else if (*d == 'h') {
3997 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
3998 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
3999 if (strEQ(d,"hostent")) return -KEY_gethostent;
4001 else if (*d == 'n') {
4002 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4003 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4004 if (strEQ(d,"netent")) return -KEY_getnetent;
4006 else if (*d == 's') {
4007 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4008 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4009 if (strEQ(d,"servent")) return -KEY_getservent;
4010 if (strEQ(d,"sockname")) return -KEY_getsockname;
4011 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4013 else if (*d == 'g') {
4014 if (strEQ(d,"grent")) return -KEY_getgrent;
4015 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4016 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4018 else if (*d == 'l') {
4019 if (strEQ(d,"login")) return -KEY_getlogin;
4021 else if (strEQ(d,"c")) return -KEY_getc;
4026 if (strEQ(d,"gt")) return -KEY_gt;
4027 if (strEQ(d,"ge")) return -KEY_ge;
4030 if (strEQ(d,"grep")) return KEY_grep;
4031 if (strEQ(d,"goto")) return KEY_goto;
4032 if (strEQ(d,"glob")) return KEY_glob;
4035 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4040 if (strEQ(d,"hex")) return -KEY_hex;
4043 if (strEQ(d,"INIT")) return KEY_INIT;
4048 if (strEQ(d,"if")) return KEY_if;
4051 if (strEQ(d,"int")) return -KEY_int;
4054 if (strEQ(d,"index")) return -KEY_index;
4055 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4060 if (strEQ(d,"join")) return -KEY_join;
4064 if (strEQ(d,"keys")) return KEY_keys;
4065 if (strEQ(d,"kill")) return -KEY_kill;
4070 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4071 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4077 if (strEQ(d,"lt")) return -KEY_lt;
4078 if (strEQ(d,"le")) return -KEY_le;
4079 if (strEQ(d,"lc")) return -KEY_lc;
4082 if (strEQ(d,"log")) return -KEY_log;
4085 if (strEQ(d,"last")) return KEY_last;
4086 if (strEQ(d,"link")) return -KEY_link;
4087 if (strEQ(d,"lock")) return -KEY_lock;
4090 if (strEQ(d,"local")) return KEY_local;
4091 if (strEQ(d,"lstat")) return -KEY_lstat;
4094 if (strEQ(d,"length")) return -KEY_length;
4095 if (strEQ(d,"listen")) return -KEY_listen;
4098 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4101 if (strEQ(d,"localtime")) return -KEY_localtime;
4107 case 1: return KEY_m;
4109 if (strEQ(d,"my")) return KEY_my;
4112 if (strEQ(d,"map")) return KEY_map;
4115 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4118 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4119 if (strEQ(d,"msgget")) return -KEY_msgget;
4120 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4121 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4126 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4129 if (strEQ(d,"next")) return KEY_next;
4130 if (strEQ(d,"ne")) return -KEY_ne;
4131 if (strEQ(d,"not")) return -KEY_not;
4132 if (strEQ(d,"no")) return KEY_no;
4137 if (strEQ(d,"or")) return -KEY_or;
4140 if (strEQ(d,"ord")) return -KEY_ord;
4141 if (strEQ(d,"oct")) return -KEY_oct;
4144 if (strEQ(d,"open")) return -KEY_open;
4147 if (strEQ(d,"opendir")) return -KEY_opendir;
4154 if (strEQ(d,"pop")) return KEY_pop;
4155 if (strEQ(d,"pos")) return KEY_pos;
4158 if (strEQ(d,"push")) return KEY_push;
4159 if (strEQ(d,"pack")) return -KEY_pack;
4160 if (strEQ(d,"pipe")) return -KEY_pipe;
4163 if (strEQ(d,"print")) return KEY_print;
4166 if (strEQ(d,"printf")) return KEY_printf;
4169 if (strEQ(d,"package")) return KEY_package;
4172 if (strEQ(d,"prototype")) return KEY_prototype;
4177 if (strEQ(d,"q")) return KEY_q;
4178 if (strEQ(d,"qq")) return KEY_qq;
4179 if (strEQ(d,"qw")) return KEY_qw;
4180 if (strEQ(d,"qx")) return KEY_qx;
4182 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4187 if (strEQ(d,"ref")) return -KEY_ref;
4190 if (strEQ(d,"read")) return -KEY_read;
4191 if (strEQ(d,"rand")) return -KEY_rand;
4192 if (strEQ(d,"recv")) return -KEY_recv;
4193 if (strEQ(d,"redo")) return KEY_redo;
4196 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4197 if (strEQ(d,"reset")) return -KEY_reset;
4200 if (strEQ(d,"return")) return KEY_return;
4201 if (strEQ(d,"rename")) return -KEY_rename;
4202 if (strEQ(d,"rindex")) return -KEY_rindex;
4205 if (strEQ(d,"require")) return -KEY_require;
4206 if (strEQ(d,"reverse")) return -KEY_reverse;
4207 if (strEQ(d,"readdir")) return -KEY_readdir;
4210 if (strEQ(d,"readlink")) return -KEY_readlink;
4211 if (strEQ(d,"readline")) return -KEY_readline;
4212 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4215 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4221 case 0: return KEY_s;
4223 if (strEQ(d,"scalar")) return KEY_scalar;
4228 if (strEQ(d,"seek")) return -KEY_seek;
4229 if (strEQ(d,"send")) return -KEY_send;
4232 if (strEQ(d,"semop")) return -KEY_semop;
4235 if (strEQ(d,"select")) return -KEY_select;
4236 if (strEQ(d,"semctl")) return -KEY_semctl;
4237 if (strEQ(d,"semget")) return -KEY_semget;
4240 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4241 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4244 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4245 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4248 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4251 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4252 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4253 if (strEQ(d,"setservent")) return -KEY_setservent;
4256 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4257 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4264 if (strEQ(d,"shift")) return KEY_shift;
4267 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4268 if (strEQ(d,"shmget")) return -KEY_shmget;
4271 if (strEQ(d,"shmread")) return -KEY_shmread;
4274 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4275 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4280 if (strEQ(d,"sin")) return -KEY_sin;
4283 if (strEQ(d,"sleep")) return -KEY_sleep;
4286 if (strEQ(d,"sort")) return KEY_sort;
4287 if (strEQ(d,"socket")) return -KEY_socket;
4288 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4291 if (strEQ(d,"split")) return KEY_split;
4292 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4293 if (strEQ(d,"splice")) return KEY_splice;
4296 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4299 if (strEQ(d,"srand")) return -KEY_srand;
4302 if (strEQ(d,"stat")) return -KEY_stat;
4303 if (strEQ(d,"study")) return KEY_study;
4306 if (strEQ(d,"substr")) return -KEY_substr;
4307 if (strEQ(d,"sub")) return KEY_sub;
4312 if (strEQ(d,"system")) return -KEY_system;
4315 if (strEQ(d,"symlink")) return -KEY_symlink;
4316 if (strEQ(d,"syscall")) return -KEY_syscall;
4317 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4318 if (strEQ(d,"sysread")) return -KEY_sysread;
4319 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4322 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4331 if (strEQ(d,"tr")) return KEY_tr;
4334 if (strEQ(d,"tie")) return KEY_tie;
4337 if (strEQ(d,"tell")) return -KEY_tell;
4338 if (strEQ(d,"tied")) return KEY_tied;
4339 if (strEQ(d,"time")) return -KEY_time;
4342 if (strEQ(d,"times")) return -KEY_times;
4345 if (strEQ(d,"telldir")) return -KEY_telldir;
4348 if (strEQ(d,"truncate")) return -KEY_truncate;
4355 if (strEQ(d,"uc")) return -KEY_uc;
4358 if (strEQ(d,"use")) return KEY_use;
4361 if (strEQ(d,"undef")) return KEY_undef;
4362 if (strEQ(d,"until")) return KEY_until;
4363 if (strEQ(d,"untie")) return KEY_untie;
4364 if (strEQ(d,"utime")) return -KEY_utime;
4365 if (strEQ(d,"umask")) return -KEY_umask;
4368 if (strEQ(d,"unless")) return KEY_unless;
4369 if (strEQ(d,"unpack")) return -KEY_unpack;
4370 if (strEQ(d,"unlink")) return -KEY_unlink;
4373 if (strEQ(d,"unshift")) return KEY_unshift;
4374 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4379 if (strEQ(d,"values")) return -KEY_values;
4380 if (strEQ(d,"vec")) return -KEY_vec;
4385 if (strEQ(d,"warn")) return -KEY_warn;
4386 if (strEQ(d,"wait")) return -KEY_wait;
4389 if (strEQ(d,"while")) return KEY_while;
4390 if (strEQ(d,"write")) return -KEY_write;
4393 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4396 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4401 if (len == 1) return -KEY_x;
4402 if (strEQ(d,"xor")) return -KEY_xor;
4405 if (len == 1) return KEY_y;
4414 checkcomma(register char *s, char *name, char *what)
4418 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4420 for (w = s+2; *w && level; w++) {
4427 for (; *w && isSPACE(*w); w++) ;
4428 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4429 warn("%s (...) interpreted as function",name);
4431 while (s < bufend && isSPACE(*s))
4435 while (s < bufend && isSPACE(*s))
4437 if (isIDFIRST(*s)) {
4441 while (s < bufend && isSPACE(*s))
4446 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4450 croak("No comma allowed after %s", what);
4456 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4458 register char *d = dest;
4459 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4462 croak(ident_too_long);
4465 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4470 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4483 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4490 if (lex_brackets == 0)
4495 e = d + destlen - 3; /* two-character token, ending NUL */
4497 while (isDIGIT(*s)) {
4499 croak(ident_too_long);
4506 croak(ident_too_long);
4509 else if (*s == '\'' && isIDFIRST(s[1])) {
4514 else if (*s == ':' && s[1] == ':') {
4525 if (lex_state != LEX_NORMAL)
4526 lex_state = LEX_INTERPENDMAYBE;
4529 if (*s == '$' && s[1] &&
4530 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4532 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4533 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4546 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4551 if (isSPACE(s[-1])) {
4554 if (ch != ' ' && ch != '\t') {
4560 if (isIDFIRST(*d)) {
4562 while (isALNUM(*s) || *s == ':')
4565 while (s < send && (*s == ' ' || *s == '\t')) s++;
4566 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4567 if (dowarn && keyword(dest, d - dest)) {
4568 char *brack = *s == '[' ? "[...]" : "{...}";
4569 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4570 funny, dest, brack, funny, dest, brack);
4572 lex_fakebrack = lex_brackets+1;
4574 lex_brackstack[lex_brackets++] = XOPERATOR;
4580 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4581 lex_state = LEX_INTERPEND;
4584 if (dowarn && lex_state == LEX_NORMAL &&
4585 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4586 warn("Ambiguous use of %c{%s} resolved to %c%s",
4587 funny, dest, funny, dest);
4590 s = bracket; /* let the parser handle it */
4594 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4595 lex_state = LEX_INTERPEND;
4599 void pmflag(U16 *pmfl, int ch)
4604 *pmfl |= PMf_GLOBAL;
4606 *pmfl |= PMf_CONTINUE;
4610 *pmfl |= PMf_MULTILINE;
4612 *pmfl |= PMf_SINGLELINE;
4614 *pmfl |= PMf_EXTENDED;
4618 scan_pat(char *start)
4623 s = scan_str(start);
4626 SvREFCNT_dec(lex_stuff);
4628 croak("Search pattern not terminated");
4631 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4632 if (multi_open == '?')
4633 pm->op_pmflags |= PMf_ONCE;
4634 while (*s && strchr("iogcmsx", *s))
4635 pmflag(&pm->op_pmflags,*s++);
4636 pm->op_pmpermflags = pm->op_pmflags;
4639 yylval.ival = OP_MATCH;
4644 scan_subst(char *start)
4651 yylval.ival = OP_NULL;
4653 s = scan_str(start);
4657 SvREFCNT_dec(lex_stuff);
4659 croak("Substitution pattern not terminated");
4662 if (s[-1] == multi_open)
4665 first_start = multi_start;
4669 SvREFCNT_dec(lex_stuff);
4672 SvREFCNT_dec(lex_repl);
4674 croak("Substitution replacement not terminated");
4676 multi_start = first_start; /* so whole substitution is taken together */
4678 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4679 while (*s && strchr("iogcmsex", *s)) {
4685 pmflag(&pm->op_pmflags,*s++);
4690 pm->op_pmflags |= PMf_EVAL;
4691 repl = newSVpv("",0);
4693 sv_catpv(repl, es ? "eval " : "do ");
4694 sv_catpvn(repl, "{ ", 2);
4695 sv_catsv(repl, lex_repl);
4696 sv_catpvn(repl, " };", 2);
4697 SvCOMPILED_on(repl);
4698 SvREFCNT_dec(lex_repl);
4702 pm->op_pmpermflags = pm->op_pmflags;
4704 yylval.ival = OP_SUBST;
4709 scan_trans(char *start)
4718 yylval.ival = OP_NULL;
4720 s = scan_str(start);
4723 SvREFCNT_dec(lex_stuff);
4725 croak("Translation pattern not terminated");
4727 if (s[-1] == multi_open)
4733 SvREFCNT_dec(lex_stuff);
4736 SvREFCNT_dec(lex_repl);
4738 croak("Translation replacement not terminated");
4741 New(803,tbl,256,short);
4742 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4744 complement = Delete = squash = 0;
4745 while (*s == 'c' || *s == 'd' || *s == 's') {
4747 complement = OPpTRANS_COMPLEMENT;
4749 Delete = OPpTRANS_DELETE;
4751 squash = OPpTRANS_SQUASH;
4754 o->op_private = Delete|squash|complement;
4757 yylval.ival = OP_TRANS;
4762 scan_heredoc(register char *s)
4766 I32 op_type = OP_SCALAR;
4773 int outer = (rsfp && !lex_inwhat);
4777 e = tokenbuf + sizeof tokenbuf - 1;
4780 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4781 if (*peek && strchr("`'\"",*peek)) {
4784 s = delimcpy(d, e, s, bufend, term, &len);
4795 deprecate("bare << to mean <<\"\"");
4796 for (; isALNUM(*s); s++) {
4801 if (d >= tokenbuf + sizeof tokenbuf - 1)
4802 croak("Delimiter for here document is too long");
4807 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4808 herewas = newSVpv(s,bufend-s);
4810 s--, herewas = newSVpv(s,d-s);
4811 s += SvCUR(herewas);
4813 tmpstr = NEWSV(87,80);
4814 sv_upgrade(tmpstr, SVt_PVIV);
4819 else if (term == '`') {
4820 op_type = OP_BACKTICK;
4821 SvIVX(tmpstr) = '\\';
4825 multi_start = curcop->cop_line;
4826 multi_open = multi_close = '<';
4830 while (s < bufend &&
4831 (*s != term || memNE(s,tokenbuf,len)) ) {
4836 curcop->cop_line = multi_start;
4837 missingterm(tokenbuf);
4839 sv_setpvn(tmpstr,d+1,s-d);
4841 sv_catpvn(herewas,s,bufend-s);
4842 sv_setsv(linestr,herewas);
4843 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4844 bufend = SvPVX(linestr) + SvCUR(linestr);
4847 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4848 while (s >= bufend) { /* multiple line string? */
4850 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4851 curcop->cop_line = multi_start;
4852 missingterm(tokenbuf);
4855 if (PERLDB_LINE && curstash != debstash) {
4856 SV *sv = NEWSV(88,0);
4858 sv_upgrade(sv, SVt_PVMG);
4859 sv_setsv(sv,linestr);
4860 av_store(GvAV(curcop->cop_filegv),
4861 (I32)curcop->cop_line,sv);
4863 bufend = SvPVX(linestr) + SvCUR(linestr);
4864 if (*s == term && memEQ(s,tokenbuf,len)) {
4867 sv_catsv(linestr,herewas);
4868 bufend = SvPVX(linestr) + SvCUR(linestr);
4872 sv_catsv(tmpstr,linestr);
4875 multi_end = curcop->cop_line;
4877 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4878 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4879 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4881 SvREFCNT_dec(herewas);
4883 yylval.ival = op_type;
4888 scan_inputsymbol(char *start)
4890 register char *s = start;
4896 e = tokenbuf + sizeof tokenbuf;
4897 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4898 if (len >= sizeof tokenbuf)
4899 croak("Excessively long <> operator");
4901 croak("Unterminated <> operator");
4903 if (*d == '$' && d[1]) d++;
4904 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4906 if (d - tokenbuf != len) {
4907 yylval.ival = OP_GLOB;
4909 s = scan_str(start);
4911 croak("Glob not terminated");
4917 (void)strcpy(d,"ARGV");
4920 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4921 OP *o = newOP(OP_PADSV, 0);
4923 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4926 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4927 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4928 newUNOP(OP_RV2GV, 0,
4929 newUNOP(OP_RV2SV, 0,
4930 newGVOP(OP_GV, 0, gv))));
4932 yylval.ival = OP_NULL;
4935 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4936 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4937 yylval.ival = OP_NULL;
4944 scan_str(char *start)
4949 register char *s = start;
4958 multi_start = curcop->cop_line;
4960 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4965 sv_upgrade(sv, SVt_PVIV);
4967 (void)SvPOK_only(sv); /* validate pointer */
4970 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
4971 to = SvPVX(sv)+SvCUR(sv);
4972 if (multi_open == multi_close) {
4973 for (; s < bufend; s++,to++) {
4974 if (*s == '\n' && !rsfp)
4976 if (*s == '\\' && s+1 < bufend && term != '\\') {
4982 else if (*s == term)
4988 for (; s < bufend; s++,to++) {
4989 if (*s == '\n' && !rsfp)
4991 if (*s == '\\' && s+1 < bufend) {
4992 if ((s[1] == multi_open) || (s[1] == multi_close))
4997 else if (*s == multi_close && --brackets <= 0)
4999 else if (*s == multi_open)
5005 SvCUR_set(sv, to - SvPVX(sv));
5007 if (s < bufend) break; /* string ends on this line? */
5010 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5012 curcop->cop_line = multi_start;
5016 if (PERLDB_LINE && curstash != debstash) {
5017 SV *sv = NEWSV(88,0);
5019 sv_upgrade(sv, SVt_PVMG);
5020 sv_setsv(sv,linestr);
5021 av_store(GvAV(curcop->cop_filegv),
5022 (I32)curcop->cop_line, sv);
5024 bufend = SvPVX(linestr) + SvCUR(linestr);
5026 multi_end = curcop->cop_line;
5028 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5029 SvLEN_set(sv, SvCUR(sv) + 1);
5030 Renew(SvPVX(sv), SvLEN(sv), char);
5040 scan_num(char *start)
5042 register char *s = start;
5050 static char number_too_long[] = "Number too long";
5054 croak("panic: scan_num");
5059 bool overflowed = FALSE;
5065 else if (s[1] == '.')
5081 yyerror("Illegal octal digit");
5083 case '0': case '1': case '2': case '3': case '4':
5084 case '5': case '6': case '7':
5087 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5088 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5094 if (!overflowed && (n >> shift) != u) {
5095 warn("Integer overflow in %s number",
5096 (shift == 4) ? "hex" : "octal");
5108 case '1': case '2': case '3': case '4': case '5':
5109 case '6': case '7': case '8': case '9': case '.':
5112 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5114 while (isDIGIT(*s) || *s == '_') {
5116 if (dowarn && lastub && s - lastub != 3)
5117 warn("Misplaced _ in number");
5122 croak(number_too_long);
5126 if (dowarn && lastub && s - lastub != 3)
5127 warn("Misplaced _ in number");
5128 if (*s == '.' && s[1] != '.') {
5131 for (; isDIGIT(*s) || *s == '_'; s++) {
5133 croak(number_too_long);
5138 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5141 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5142 if (*s == '+' || *s == '-')
5144 while (isDIGIT(*s)) {
5146 croak(number_too_long);
5152 SET_NUMERIC_STANDARD();
5153 value = atof(tokenbuf);
5155 if (!floatit && (double)tryiv == value)
5156 sv_setiv(sv, tryiv);
5158 sv_setnv(sv, value);
5162 yylval.opval = newSVOP(OP_CONST, 0, sv);
5168 scan_formline(register char *s)
5173 SV *stuff = newSVpv("",0);
5174 bool needargs = FALSE;
5177 if (*s == '.' || *s == '}') {
5179 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5183 if (in_eval && !rsfp) {
5184 eol = strchr(s,'\n');
5189 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5191 for (t = s; t < eol; t++) {
5192 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5194 goto enough; /* ~~ must be first line in formline */
5196 if (*t == '@' || *t == '^')
5199 sv_catpvn(stuff, s, eol-s);
5203 s = filter_gets(linestr, rsfp, 0);
5204 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5205 bufend = bufptr + SvCUR(linestr);
5208 yyerror("Format not terminated");
5218 lex_state = LEX_NORMAL;
5219 nextval[nexttoke].ival = 0;
5223 lex_state = LEX_FORMLINE;
5224 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5226 nextval[nexttoke].ival = OP_FORMLINE;
5230 SvREFCNT_dec(stuff);
5242 cshlen = strlen(cshname);
5247 start_subparse(I32 is_format, U32 flags)
5250 I32 oldsavestack_ix = savestack_ix;
5251 CV* outsidecv = compcv;
5255 assert(SvTYPE(compcv) == SVt_PVCV);
5262 SAVESPTR(comppad_name);
5264 SAVEI32(comppad_name_fill);
5265 SAVEI32(min_intro_pending);
5266 SAVEI32(max_intro_pending);
5267 SAVEI32(pad_reset_pending);
5269 compcv = (CV*)NEWSV(1104,0);
5270 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5271 CvFLAGS(compcv) |= flags;
5274 av_push(comppad, Nullsv);
5275 curpad = AvARRAY(comppad);
5276 comppad_name = newAV();
5277 comppad_name_fill = 0;
5278 min_intro_pending = 0;
5280 subline = curcop->cop_line;
5282 av_store(comppad_name, 0, newSVpv("@_", 2));
5283 curpad[0] = (SV*)newAV();
5284 SvPADMY_on(curpad[0]); /* XXX Needed? */
5285 CvOWNER(compcv) = 0;
5286 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5287 MUTEX_INIT(CvMUTEXP(compcv));
5288 #endif /* USE_THREADS */
5290 comppadlist = newAV();
5291 AvREAL_off(comppadlist);
5292 av_store(comppadlist, 0, (SV*)comppad_name);
5293 av_store(comppadlist, 1, (SV*)comppad);
5295 CvPADLIST(compcv) = comppadlist;
5296 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5298 CvOWNER(compcv) = 0;
5299 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5300 MUTEX_INIT(CvMUTEXP(compcv));
5301 #endif /* USE_THREADS */
5303 return oldsavestack_ix;
5322 char *context = NULL;
5326 if (!yychar || (yychar == ';' && !rsfp))
5328 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5329 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5330 while (isSPACE(*oldoldbufptr))
5332 context = oldoldbufptr;
5333 contlen = bufptr - oldoldbufptr;
5335 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5336 oldbufptr != bufptr) {
5337 while (isSPACE(*oldbufptr))
5339 context = oldbufptr;
5340 contlen = bufptr - oldbufptr;
5342 else if (yychar > 255)
5343 where = "next token ???";
5344 else if ((yychar & 127) == 127) {
5345 if (lex_state == LEX_NORMAL ||
5346 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5347 where = "at end of line";
5349 where = "within pattern";
5351 where = "within string";
5354 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5356 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5357 else if (isPRINT_LC(yychar))
5358 sv_catpvf(where_sv, "%c", yychar);
5360 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5361 where = SvPVX(where_sv);
5363 msg = sv_2mortal(newSVpv(s, 0));
5364 sv_catpvf(msg, " at %_ line %ld, ",
5365 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5367 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5369 sv_catpvf(msg, "%s\n", where);
5370 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5372 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5373 (int)multi_open,(int)multi_close,(long)multi_start);
5379 sv_catsv(ERRSV, msg);
5381 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5382 if (++error_count >= 10)
5383 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5385 in_my_stash = Nullhv;