3 * Copyright (c) 1991-1997, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
17 static void check_uni _((void));
18 static void force_next _((I32 type));
19 static char *force_version _((char *start));
20 static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
21 static SV *q _((SV *sv));
22 static char *scan_const _((char *start));
23 static char *scan_formline _((char *s));
24 static char *scan_heredoc _((char *s));
25 static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
27 static char *scan_inputsymbol _((char *start));
28 static char *scan_pat _((char *start));
29 static char *scan_str _((char *start));
30 static char *scan_subst _((char *start));
31 static char *scan_trans _((char *start));
32 static char *scan_word _((char *s, char *dest, STRLEN destlen,
33 int allow_package, STRLEN *slp));
34 static char *skipspace _((char *s));
35 static void checkcomma _((char *s, char *name, char *what));
36 static void force_ident _((char *s, int kind));
37 static void incline _((char *s));
38 static int intuit_method _((char *s, GV *gv));
39 static int intuit_more _((char *s));
40 static I32 lop _((I32 f, expectation x, char *s));
41 static void missingterm _((char *s));
42 static void no_op _((char *what, char *s));
43 static void set_csh _((void));
44 static I32 sublex_done _((void));
45 static I32 sublex_push _((void));
46 static I32 sublex_start _((void));
48 static int uni _((I32 f, char *s));
50 static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
51 static void restore_rsfp _((void *f));
52 static void restore_expect _((void *e));
53 static void restore_lex_expect _((void *e));
55 static char ident_too_long[] = "Identifier too long";
57 static char *linestart; /* beg. of most recently read line */
59 static char pending_ident; /* pending identifier lookup */
62 I32 super_state; /* lexer state to save */
63 I32 sub_inwhat; /* "lex_inwhat" to use */
64 OP *sub_op; /* "lex_op" to use */
67 /* The following are arranged oddly so that the guard on the switch statement
68 * can get by with a single comparison (if the compiler is smart enough).
71 /* #define LEX_NOTPARSING 11 is done in perl.h. */
74 #define LEX_INTERPNORMAL 9
75 #define LEX_INTERPCASEMOD 8
76 #define LEX_INTERPPUSH 7
77 #define LEX_INTERPSTART 6
78 #define LEX_INTERPEND 5
79 #define LEX_INTERPENDMAYBE 4
80 #define LEX_INTERPCONCAT 3
81 #define LEX_INTERPCONST 2
82 #define LEX_FORMLINE 1
83 #define LEX_KNOWNEXT 0
92 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
94 # include <unistd.h> /* Needed for execv() */
102 #include "keywords.h"
107 #define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
109 #define TOKEN(retval) return (bufptr = s,(int)retval)
110 #define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
111 #define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
112 #define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
113 #define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
114 #define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
115 #define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
116 #define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
117 #define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
118 #define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
119 #define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
120 #define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
121 #define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
122 #define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
123 #define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
124 #define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
125 #define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
126 #define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
127 #define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
128 #define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
130 /* This bit of chicanery makes a unary function followed by
131 * a parenthesis into a function with one argument, highest precedence.
133 #define UNI(f) return(yylval.ival = f, \
136 last_uni = oldbufptr, \
138 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
140 #define UNIBRACK(f) return(yylval.ival = f, \
142 last_uni = oldbufptr, \
143 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
145 /* grandfather return to old style */
146 #define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
151 if (*bufptr == '=') {
153 if (toketype == ANDAND)
154 yylval.ival = OP_ANDASSIGN;
155 else if (toketype == OROR)
156 yylval.ival = OP_ORASSIGN;
163 no_op(char *what, char *s)
165 char *oldbp = bufptr;
166 bool is_first = (oldbufptr == linestart);
169 yywarn(form("%s found where operator expected", what));
171 warn("\t(Missing semicolon on previous line?)\n");
172 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
174 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
175 if (t < bufptr && isSPACE(*t))
176 warn("\t(Do you need to predeclare %.*s?)\n",
177 t - oldoldbufptr, oldoldbufptr);
181 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
191 char *nl = strrchr(s,'\n');
195 else if (multi_close < 32 || multi_close == 127) {
197 tmpbuf[1] = toCTRL(multi_close);
203 *tmpbuf = multi_close;
207 q = strchr(s,'"') ? '\'' : '"';
208 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
215 warn("Use of %s is deprecated", s);
221 deprecate("comma-less variable list");
227 win32_textfilter(int idx, SV *sv, int maxlen)
229 I32 count = FILTER_READ(idx+1, sv, maxlen);
230 if (count > 0 && !maxlen)
231 win32_strip_return(sv);
245 SAVEI32(lex_brackets);
246 SAVEI32(lex_fakebrack);
247 SAVEI32(lex_casemods);
252 SAVEI16(curcop->cop_line);
256 SAVEPPTR(oldoldbufptr);
259 SAVEPPTR(lex_brackstack);
260 SAVEPPTR(lex_casestack);
261 SAVEDESTRUCTOR(restore_rsfp, rsfp);
265 SAVEDESTRUCTOR(restore_expect, tokenbuf + expect); /* encode as pointer */
266 SAVEDESTRUCTOR(restore_lex_expect, tokenbuf + expect);
268 lex_state = LEX_NORMAL;
273 New(899, lex_brackstack, 120, char);
274 New(899, lex_casestack, 12, char);
275 SAVEFREEPV(lex_brackstack);
276 SAVEFREEPV(lex_casestack);
278 *lex_casestack = '\0';
286 if (SvREADONLY(linestr))
287 linestr = sv_2mortal(newSVsv(linestr));
288 s = SvPV(linestr, len);
289 if (len && s[len-1] != ';') {
290 if (!(SvFLAGS(linestr) & SVs_TEMP))
291 linestr = sv_2mortal(newSVsv(linestr));
292 sv_catpvn(linestr, "\n;", 2);
295 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
296 bufend = bufptr + SvCUR(linestr);
298 rs = newSVpv("\n", 1);
309 restore_rsfp(void *f)
311 PerlIO *fp = (PerlIO*)f;
313 if (rsfp == PerlIO_stdin())
314 PerlIO_clearerr(rsfp);
315 else if (rsfp && (rsfp != fp))
324 /* a safe way to store a small integer in a pointer */
325 expect = (expectation)((char *)e - tokenbuf);
329 restore_lex_expect(e)
332 /* a safe way to store a small integer in a pointer */
333 lex_expect = (expectation)((char *)e - tokenbuf);
348 while (*s == ' ' || *s == '\t') s++;
349 if (strnEQ(s, "line ", 5)) {
358 while (*s == ' ' || *s == '\t')
360 if (*s == '"' && (t = strchr(s+1, '"')))
364 return; /* false alarm */
365 for (t = s; !isSPACE(*t); t++) ;
370 curcop->cop_filegv = gv_fetchfile(s);
372 curcop->cop_filegv = gv_fetchfile(origfilename);
374 curcop->cop_line = atoi(n)-1;
378 skipspace(register char *s)
381 if (lex_formbrack && lex_brackets <= lex_formbrack) {
382 while (s < bufend && (*s == ' ' || *s == '\t'))
388 while (s < bufend && isSPACE(*s))
390 if (s < bufend && *s == '#') {
391 while (s < bufend && *s != '\n')
396 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
398 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
399 if (minus_n || minus_p) {
400 sv_setpv(linestr,minus_p ?
401 ";}continue{print or die qq(-p destination: $!\\n)" :
403 sv_catpv(linestr,";}");
404 minus_n = minus_p = 0;
407 sv_setpv(linestr,";");
408 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
409 bufend = SvPVX(linestr) + SvCUR(linestr);
410 if (preprocess && !in_eval)
411 (void)PerlProc_pclose(rsfp);
412 else if ((PerlIO*)rsfp == PerlIO_stdin())
413 PerlIO_clearerr(rsfp);
415 (void)PerlIO_close(rsfp);
421 linestart = bufptr = s + prevlen;
422 bufend = s + SvCUR(linestr);
425 if (PERLDB_LINE && curstash != debstash) {
426 SV *sv = NEWSV(85,0);
428 sv_upgrade(sv, SVt_PVMG);
429 sv_setpvn(sv,bufptr,bufend-bufptr);
430 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
441 if (oldoldbufptr != last_uni)
443 while (isSPACE(*last_uni))
445 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
446 if ((t = strchr(s, '(')) && t < bufptr)
450 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
457 #define UNI(f) return uni(f,s)
465 last_uni = oldbufptr;
476 #endif /* CRIPPLED_CC */
478 #define LOP(f,x) return lop(f,x,s)
483 (I32 f, expectation x, char *s)
489 #endif /* CAN_PROTOTYPE */
496 last_lop = oldbufptr;
512 nexttype[nexttoke] = type;
514 if (lex_state != LEX_KNOWNEXT) {
515 lex_defer = lex_state;
517 lex_state = LEX_KNOWNEXT;
522 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
527 start = skipspace(start);
530 (allow_pack && *s == ':') ||
531 (allow_initial_tick && *s == '\'') )
533 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
534 if (check_keyword && keyword(tokenbuf, len))
536 if (token == METHOD) {
546 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
547 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
554 force_ident(register char *s, int kind)
557 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
558 nextval[nexttoke].opval = o;
561 dTHR; /* just for in_eval */
562 o->op_private = OPpCONST_ENTERED;
563 /* XXX see note in pp_entereval() for why we forgo typo
564 warnings if the symbol must be introduced in an eval.
566 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
567 kind == '$' ? SVt_PV :
568 kind == '@' ? SVt_PVAV :
569 kind == '%' ? SVt_PVHV :
577 force_version(char *s)
579 OP *version = Nullop;
583 /* default VERSION number -- GBARR */
588 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
589 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
591 /* real VERSION number -- GBARR */
592 version = yylval.opval;
596 /* NOTE: The parser sees the package name and the VERSION swapped */
597 nextval[nexttoke].opval = version;
614 s = SvPV_force(sv, len);
618 while (s < send && *s != '\\')
625 if (s + 1 < send && (s[1] == '\\'))
626 s++; /* all that, just for this */
631 SvCUR_set(sv, d - SvPVX(sv));
639 register I32 op_type = yylval.ival;
641 if (op_type == OP_NULL) {
642 yylval.opval = lex_op;
646 if (op_type == OP_CONST || op_type == OP_READLINE) {
647 SV *sv = q(lex_stuff);
649 char *p = SvPV(sv, len);
650 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
656 sublex_info.super_state = lex_state;
657 sublex_info.sub_inwhat = op_type;
658 sublex_info.sub_op = lex_op;
659 lex_state = LEX_INTERPPUSH;
663 yylval.opval = lex_op;
677 lex_state = sublex_info.super_state;
679 SAVEI32(lex_brackets);
680 SAVEI32(lex_fakebrack);
681 SAVEI32(lex_casemods);
686 SAVEI16(curcop->cop_line);
689 SAVEPPTR(oldoldbufptr);
692 SAVEPPTR(lex_brackstack);
693 SAVEPPTR(lex_casestack);
698 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
699 bufend += SvCUR(linestr);
705 New(899, lex_brackstack, 120, char);
706 New(899, lex_casestack, 12, char);
707 SAVEFREEPV(lex_brackstack);
708 SAVEFREEPV(lex_casestack);
710 *lex_casestack = '\0';
712 lex_state = LEX_INTERPCONCAT;
713 curcop->cop_line = multi_start;
715 lex_inwhat = sublex_info.sub_inwhat;
716 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
717 lex_inpat = sublex_info.sub_op;
729 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
733 if (lex_casemods) { /* oops, we've got some unbalanced parens */
734 lex_state = LEX_INTERPCASEMOD;
738 /* Is there a right-hand side to take care of? */
739 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
742 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
743 bufend += SvCUR(linestr);
749 *lex_casestack = '\0';
751 if (SvCOMPILED(lex_repl)) {
752 lex_state = LEX_INTERPNORMAL;
756 lex_state = LEX_INTERPCONCAT;
762 bufend = SvPVX(linestr);
763 bufend += SvCUR(linestr);
770 scan_const(char *start)
772 register char *send = bufend;
773 SV *sv = NEWSV(93, send - start);
774 register char *s = start;
775 register char *d = SvPVX(sv);
776 bool dorange = FALSE;
780 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
781 : (lex_inwhat & OP_TRANS)
785 while (s < send || dorange) {
786 if (lex_inwhat == OP_TRANS) {
791 SvGROW(sv, SvLEN(sv) + 256);
795 for (i = (U8)*d; i <= max; i++)
800 else if (*s == '-' && s+1 < send && s != start) {
805 else if (*s == '(' && lex_inpat && s[1] == '?' && s[2] == '#') {
806 while (s < send && *s != ')')
809 else if (*s == '#' && lex_inpat &&
810 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
811 while (s+1 < send && *s != '\n')
814 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
816 else if (*s == '$') {
817 if (!lex_inpat) /* not a regexp, so $ must be var */
819 if (s + 1 < send && !strchr("()| \n\t", s[1]))
820 break; /* in regexp, $ might be tail anchor */
822 if (*s == '\\' && s+1 < send) {
824 if (*s && strchr(leaveit, *s)) {
829 if (lex_inwhat == OP_SUBST && !lex_inpat &&
830 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
833 warn("\\%c better written as $%c", *s, *s);
837 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
843 if (lex_inwhat == OP_TRANS) {
851 case '0': case '1': case '2': case '3':
852 case '4': case '5': case '6': case '7':
853 *d++ = scan_oct(s, 3, &len);
857 *d++ = scan_hex(++s, 2, &len);
893 SvCUR_set(sv, d - SvPVX(sv));
896 if (SvCUR(sv) + 5 < SvLEN(sv)) {
897 SvLEN_set(sv, SvCUR(sv) + 1);
898 Renew(SvPVX(sv), SvLEN(sv), char);
901 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
907 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
909 intuit_more(register char *s)
913 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
915 if (*s != '{' && *s != '[')
920 /* In a pattern, so maybe we have {n,m}. */
937 /* On the other hand, maybe we have a character class */
940 if (*s == ']' || *s == '^')
943 int weight = 2; /* let's weigh the evidence */
945 unsigned char un_char = 0, last_un_char;
946 char *send = strchr(s,']');
947 char tmpbuf[sizeof tokenbuf * 4];
949 if (!send) /* has to be an expression */
955 else if (isDIGIT(*s)) {
957 if (isDIGIT(s[1]) && s[2] == ']')
963 for (; s < send; s++) {
964 last_un_char = un_char;
965 un_char = (unsigned char)*s;
970 weight -= seen[un_char] * 10;
972 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
973 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
978 else if (*s == '$' && s[1] &&
979 strchr("[#!%*<>()-=",s[1])) {
980 if (/*{*/ strchr("])} =",s[2]))
989 if (strchr("wds]",s[1]))
991 else if (seen['\''] || seen['"'])
993 else if (strchr("rnftbxcav",s[1]))
995 else if (isDIGIT(s[1])) {
997 while (s[1] && isDIGIT(s[1]))
1007 if (strchr("aA01! ",last_un_char))
1009 if (strchr("zZ79~",s[1]))
1013 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1014 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1019 if (keyword(tmpbuf, d - tmpbuf))
1022 if (un_char == last_un_char + 1)
1024 weight -= seen[un_char];
1029 if (weight >= 0) /* probably a character class */
1037 intuit_method(char *start, GV *gv)
1039 char *s = start + (*start == '$');
1040 char tmpbuf[sizeof tokenbuf];
1048 if ((cv = GvCVu(gv))) {
1049 char *proto = SvPVX(cv);
1059 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1060 if (*start == '$') {
1061 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1066 return *s == '(' ? FUNCMETH : METHOD;
1068 if (!keyword(tmpbuf, len)) {
1069 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1070 if (indirgv && GvCVu(indirgv))
1072 /* filehandle or package name makes it a method */
1073 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1075 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1076 return 0; /* no assumptions -- "=>" quotes bearword */
1077 nextval[nexttoke].opval =
1078 (OP*)newSVOP(OP_CONST, 0,
1080 nextval[nexttoke].opval->op_private =
1085 return *s == '(' ? FUNCMETH : METHOD;
1095 char *pdb = PerlEnv_getenv("PERL5DB");
1099 SETERRNO(0,SS$_NORMAL);
1100 return "BEGIN { require 'perl5db.pl' }";
1106 /* Encoded script support. filter_add() effectively inserts a
1107 * 'pre-processing' function into the current source input stream.
1108 * Note that the filter function only applies to the current source file
1109 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1111 * The datasv parameter (which may be NULL) can be used to pass
1112 * private data to this instance of the filter. The filter function
1113 * can recover the SV using the FILTER_DATA macro and use it to
1114 * store private buffers and state information.
1116 * The supplied datasv parameter is upgraded to a PVIO type
1117 * and the IoDIRP field is used to store the function pointer.
1118 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1119 * private use must be set using malloc'd pointers.
1121 static int filter_debug = 0;
1124 filter_add(filter_t funcp, SV *datasv)
1126 if (!funcp){ /* temporary handy debugging hack to be deleted */
1127 filter_debug = atoi((char*)datasv);
1131 rsfp_filters = newAV();
1133 datasv = NEWSV(255,0);
1134 if (!SvUPGRADE(datasv, SVt_PVIO))
1135 die("Can't upgrade filter_add data to SVt_PVIO");
1136 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1138 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1139 av_unshift(rsfp_filters, 1);
1140 av_store(rsfp_filters, 0, datasv) ;
1145 /* Delete most recently added instance of this filter function. */
1147 filter_del(filter_t funcp)
1150 warn("filter_del func %p", funcp);
1151 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1153 /* if filter is on top of stack (usual case) just pop it off */
1154 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1155 sv_free(av_pop(rsfp_filters));
1159 /* we need to search for the correct entry and clear it */
1160 die("filter_del can only delete in reverse order (currently)");
1164 /* Invoke the n'th filter function for the current rsfp. */
1166 filter_read(int idx, SV *buf_sv, int maxlen)
1169 /* 0 = read one text line */
1176 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1177 /* Provide a default input filter to make life easy. */
1178 /* Note that we append to the line. This is handy. */
1180 warn("filter_read %d: from rsfp\n", idx);
1184 int old_len = SvCUR(buf_sv) ;
1186 /* ensure buf_sv is large enough */
1187 SvGROW(buf_sv, old_len + maxlen) ;
1188 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1189 if (PerlIO_error(rsfp))
1190 return -1; /* error */
1192 return 0 ; /* end of file */
1194 SvCUR_set(buf_sv, old_len + len) ;
1197 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1198 if (PerlIO_error(rsfp))
1199 return -1; /* error */
1201 return 0 ; /* end of file */
1205 return SvCUR(buf_sv);
1207 /* Skip this filter slot if filter has been deleted */
1208 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1210 warn("filter_read %d: skipped (filter deleted)\n", idx);
1211 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1213 /* Get function pointer hidden within datasv */
1214 funcp = (filter_t)IoDIRP(datasv);
1216 warn("filter_read %d: via function %p (%s)\n",
1217 idx, funcp, SvPV(datasv,na));
1218 /* Call function. The function is expected to */
1219 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1220 /* Return: <0:error, =0:eof, >0:not eof */
1221 return (*funcp)(idx, buf_sv, maxlen);
1226 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1229 if (!rsfp_filters) {
1230 filter_add(win32_textfilter,NULL);
1236 SvCUR_set(sv, 0); /* start with empty line */
1237 if (FILTER_READ(0, sv, 0) > 0)
1238 return ( SvPVX(sv) ) ;
1243 return (sv_gets(sv, fp, append));
1248 static char* exp_name[] =
1249 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1252 EXT int yychar; /* last token */
1265 if (pending_ident) {
1266 char pit = pending_ident;
1270 if (strchr(tokenbuf,':'))
1271 croak(no_myglob,tokenbuf);
1272 yylval.opval = newOP(OP_PADANY, 0);
1273 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1277 if (!strchr(tokenbuf,':')) {
1279 /* Check for single character per-thread SVs */
1280 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1281 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1282 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1284 yylval.opval = newOP(OP_THREADSV, 0);
1285 yylval.opval->op_targ = tmp;
1288 #endif /* USE_THREADS */
1289 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1290 if (last_lop_op == OP_SORT &&
1291 tokenbuf[0] == '$' &&
1292 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1295 for (d = in_eval ? oldoldbufptr : linestart;
1296 d < bufend && *d != '\n';
1299 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1300 croak("Can't use \"my %s\" in sort comparison",
1306 yylval.opval = newOP(OP_PADANY, 0);
1307 yylval.opval->op_targ = tmp;
1312 /* Force them to make up their mind on "@foo". */
1313 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1314 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1315 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1316 yyerror(form("In string, %s now must be written as \\%s",
1317 tokenbuf, tokenbuf));
1320 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1321 yylval.opval->op_private = OPpCONST_ENTERED;
1322 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1323 ((tokenbuf[0] == '$') ? SVt_PV
1324 : (tokenbuf[0] == '@') ? SVt_PVAV
1329 switch (lex_state) {
1331 case LEX_NORMAL: /* Some compilers will produce faster */
1332 case LEX_INTERPNORMAL: /* code if we comment these out. */
1338 yylval = nextval[nexttoke];
1340 lex_state = lex_defer;
1341 expect = lex_expect;
1342 lex_defer = LEX_NORMAL;
1344 return(nexttype[nexttoke]);
1346 case LEX_INTERPCASEMOD:
1348 if (bufptr != bufend && *bufptr != '\\')
1349 croak("panic: INTERPCASEMOD");
1351 if (bufptr == bufend || bufptr[1] == 'E') {
1354 oldmod = lex_casestack[--lex_casemods];
1355 lex_casestack[lex_casemods] = '\0';
1356 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1358 lex_state = LEX_INTERPCONCAT;
1362 if (bufptr != bufend)
1364 lex_state = LEX_INTERPCONCAT;
1369 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1370 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1371 if (strchr("LU", *s) &&
1372 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1374 lex_casestack[--lex_casemods] = '\0';
1377 if (lex_casemods > 10) {
1378 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1379 if (newlb != lex_casestack) {
1381 lex_casestack = newlb;
1384 lex_casestack[lex_casemods++] = *s;
1385 lex_casestack[lex_casemods] = '\0';
1386 lex_state = LEX_INTERPCONCAT;
1387 nextval[nexttoke].ival = 0;
1390 nextval[nexttoke].ival = OP_LCFIRST;
1392 nextval[nexttoke].ival = OP_UCFIRST;
1394 nextval[nexttoke].ival = OP_LC;
1396 nextval[nexttoke].ival = OP_UC;
1398 nextval[nexttoke].ival = OP_QUOTEMETA;
1400 croak("panic: yylex");
1412 case LEX_INTERPPUSH:
1413 return sublex_push();
1415 case LEX_INTERPSTART:
1416 if (bufptr == bufend)
1417 return sublex_done();
1419 lex_dojoin = (*bufptr == '@');
1420 lex_state = LEX_INTERPNORMAL;
1422 nextval[nexttoke].ival = 0;
1425 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1426 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1427 force_next(PRIVATEREF);
1429 force_ident("\"", '$');
1430 #endif /* USE_THREADS */
1431 nextval[nexttoke].ival = 0;
1433 nextval[nexttoke].ival = 0;
1435 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1444 case LEX_INTERPENDMAYBE:
1445 if (intuit_more(bufptr)) {
1446 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1454 lex_state = LEX_INTERPCONCAT;
1458 case LEX_INTERPCONCAT:
1461 croak("panic: INTERPCONCAT");
1463 if (bufptr == bufend)
1464 return sublex_done();
1466 if (SvIVX(linestr) == '\'') {
1467 SV *sv = newSVsv(linestr);
1470 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1474 s = scan_const(bufptr);
1476 lex_state = LEX_INTERPCASEMOD;
1478 lex_state = LEX_INTERPSTART;
1482 nextval[nexttoke] = yylval;
1495 lex_state = LEX_NORMAL;
1496 s = scan_formline(bufptr);
1503 oldoldbufptr = oldbufptr;
1506 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1512 croak("Unrecognized character \\%03o", *s & 255);
1515 goto fake_eof; /* emulate EOF on ^D or ^Z */
1521 yyerror("Missing right bracket");
1525 goto retry; /* ignore stray nulls */
1528 if (!in_eval && !preambled) {
1530 sv_setpv(linestr,incl_perldb());
1532 sv_catpv(linestr,";");
1534 while(AvFILLp(preambleav) >= 0) {
1535 SV *tmpsv = av_shift(preambleav);
1536 sv_catsv(linestr, tmpsv);
1537 sv_catpv(linestr, ";");
1540 sv_free((SV*)preambleav);
1543 if (minus_n || minus_p) {
1544 sv_catpv(linestr, "LINE: while (<>) {");
1546 sv_catpv(linestr,"chomp;");
1548 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1550 GvIMPORTED_AV_on(gv);
1552 if (strchr("/'\"", *splitstr)
1553 && strchr(splitstr + 1, *splitstr))
1554 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1557 s = "'~#\200\1'"; /* surely one char is unused...*/
1558 while (s[1] && strchr(splitstr, *s)) s++;
1560 sv_catpvf(linestr, "@F=split(%s%c",
1561 "q" + (delim == '\''), delim);
1562 for (s = splitstr; *s; s++) {
1564 sv_catpvn(linestr, "\\", 1);
1565 sv_catpvn(linestr, s, 1);
1567 sv_catpvf(linestr, "%c);", delim);
1571 sv_catpv(linestr,"@F=split(' ');");
1574 sv_catpv(linestr, "\n");
1575 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1576 bufend = SvPVX(linestr) + SvCUR(linestr);
1577 if (PERLDB_LINE && curstash != debstash) {
1578 SV *sv = NEWSV(85,0);
1580 sv_upgrade(sv, SVt_PVMG);
1581 sv_setsv(sv,linestr);
1582 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1587 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1590 if (preprocess && !in_eval)
1591 (void)PerlProc_pclose(rsfp);
1592 else if ((PerlIO *)rsfp == PerlIO_stdin())
1593 PerlIO_clearerr(rsfp);
1595 (void)PerlIO_close(rsfp);
1600 if (!in_eval && (minus_n || minus_p)) {
1601 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1602 sv_catpv(linestr,";}");
1603 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1604 bufend = SvPVX(linestr) + SvCUR(linestr);
1605 minus_n = minus_p = 0;
1608 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1609 sv_setpv(linestr,"");
1610 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1613 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1616 /* Incest with pod. */
1617 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1618 sv_setpv(linestr, "");
1619 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1620 bufend = SvPVX(linestr) + SvCUR(linestr);
1625 } while (doextract);
1626 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1627 if (PERLDB_LINE && curstash != debstash) {
1628 SV *sv = NEWSV(85,0);
1630 sv_upgrade(sv, SVt_PVMG);
1631 sv_setsv(sv,linestr);
1632 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1634 bufend = SvPVX(linestr) + SvCUR(linestr);
1635 if (curcop->cop_line == 1) {
1636 while (s < bufend && isSPACE(*s))
1638 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1642 if (*s == '#' && *(s+1) == '!')
1644 #ifdef ALTERNATE_SHEBANG
1646 static char as[] = ALTERNATE_SHEBANG;
1647 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1648 d = s + (sizeof(as) - 1);
1650 #endif /* ALTERNATE_SHEBANG */
1659 while (*d && !isSPACE(*d))
1663 #ifdef ARG_ZERO_IS_SCRIPT
1664 if (ipathend > ipath) {
1666 * HP-UX (at least) sets argv[0] to the script name,
1667 * which makes $^X incorrect. And Digital UNIX and Linux,
1668 * at least, set argv[0] to the basename of the Perl
1669 * interpreter. So, having found "#!", we'll set it right.
1671 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1672 assert(SvPOK(x) || SvGMAGICAL(x));
1673 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1674 sv_setpvn(x, ipath, ipathend - ipath);
1677 TAINT_NOT; /* $^X is always tainted, but that's OK */
1679 #endif /* ARG_ZERO_IS_SCRIPT */
1684 d = instr(s,"perl -");
1686 d = instr(s,"perl");
1687 #ifdef ALTERNATE_SHEBANG
1689 * If the ALTERNATE_SHEBANG on this system starts with a
1690 * character that can be part of a Perl expression, then if
1691 * we see it but not "perl", we're probably looking at the
1692 * start of Perl code, not a request to hand off to some
1693 * other interpreter. Similarly, if "perl" is there, but
1694 * not in the first 'word' of the line, we assume the line
1695 * contains the start of the Perl program.
1697 if (d && *s != '#') {
1699 while (*c && !strchr("; \t\r\n\f\v#", *c))
1702 d = Nullch; /* "perl" not in first word; ignore */
1704 *s = '#'; /* Don't try to parse shebang line */
1706 #endif /* ALTERNATE_SHEBANG */
1711 !instr(s,"indir") &&
1712 instr(origargv[0],"perl"))
1718 while (s < bufend && isSPACE(*s))
1721 Newz(899,newargv,origargc+3,char*);
1723 while (s < bufend && !isSPACE(*s))
1726 Copy(origargv+1, newargv+2, origargc+1, char*);
1731 execv(ipath, newargv);
1732 croak("Can't exec %s", ipath);
1735 U32 oldpdb = perldb;
1736 bool oldn = minus_n;
1737 bool oldp = minus_p;
1739 while (*d && !isSPACE(*d)) d++;
1740 while (*d == ' ' || *d == '\t') d++;
1744 if (*d == 'M' || *d == 'm') {
1746 while (*d && !isSPACE(*d)) d++;
1747 croak("Too late for \"-%.*s\" option",
1750 d = moreswitches(d);
1752 if (PERLDB_LINE && !oldpdb ||
1753 ( minus_n || minus_p ) && !(oldn || oldp) )
1754 /* if we have already added "LINE: while (<>) {",
1755 we must not do it again */
1757 sv_setpv(linestr, "");
1758 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1759 bufend = SvPVX(linestr) + SvCUR(linestr);
1762 (void)gv_fetchfile(origfilename);
1769 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1771 lex_state = LEX_FORMLINE;
1777 warn("Illegal character \\%03o (carriage return)", '\r');
1779 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1781 case ' ': case '\t': case '\f': case 013:
1786 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1788 while (s < d && *s != '\n')
1793 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1795 lex_state = LEX_FORMLINE;
1805 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1810 while (s < bufend && (*s == ' ' || *s == '\t'))
1813 if (strnEQ(s,"=>",2)) {
1815 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1816 (int)tmp, (int)tmp);
1817 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1818 OPERATOR('-'); /* unary minus */
1820 last_uni = oldbufptr;
1821 last_lop_op = OP_FTEREAD; /* good enough */
1823 case 'r': FTST(OP_FTEREAD);
1824 case 'w': FTST(OP_FTEWRITE);
1825 case 'x': FTST(OP_FTEEXEC);
1826 case 'o': FTST(OP_FTEOWNED);
1827 case 'R': FTST(OP_FTRREAD);
1828 case 'W': FTST(OP_FTRWRITE);
1829 case 'X': FTST(OP_FTREXEC);
1830 case 'O': FTST(OP_FTROWNED);
1831 case 'e': FTST(OP_FTIS);
1832 case 'z': FTST(OP_FTZERO);
1833 case 's': FTST(OP_FTSIZE);
1834 case 'f': FTST(OP_FTFILE);
1835 case 'd': FTST(OP_FTDIR);
1836 case 'l': FTST(OP_FTLINK);
1837 case 'p': FTST(OP_FTPIPE);
1838 case 'S': FTST(OP_FTSOCK);
1839 case 'u': FTST(OP_FTSUID);
1840 case 'g': FTST(OP_FTSGID);
1841 case 'k': FTST(OP_FTSVTX);
1842 case 'b': FTST(OP_FTBLK);
1843 case 'c': FTST(OP_FTCHR);
1844 case 't': FTST(OP_FTTTY);
1845 case 'T': FTST(OP_FTTEXT);
1846 case 'B': FTST(OP_FTBINARY);
1847 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1848 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1849 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1851 croak("Unrecognized file test: -%c", (int)tmp);
1858 if (expect == XOPERATOR)
1863 else if (*s == '>') {
1866 if (isIDFIRST(*s)) {
1867 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1875 if (expect == XOPERATOR)
1878 if (isSPACE(*s) || !isSPACE(*bufptr))
1880 OPERATOR('-'); /* unary minus */
1887 if (expect == XOPERATOR)
1892 if (expect == XOPERATOR)
1895 if (isSPACE(*s) || !isSPACE(*bufptr))
1901 if (expect != XOPERATOR) {
1902 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1904 force_ident(tokenbuf, '*');
1917 if (expect == XOPERATOR) {
1922 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1925 yyerror("Final % should be \\% or %name");
1928 pending_ident = '%';
1950 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1951 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1956 if (curcop->cop_line < copline)
1957 copline = curcop->cop_line;
1968 if (lex_brackets <= 0)
1969 yyerror("Unmatched right bracket");
1972 if (lex_state == LEX_INTERPNORMAL) {
1973 if (lex_brackets == 0) {
1974 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1975 lex_state = LEX_INTERPEND;
1982 if (lex_brackets > 100) {
1983 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
1984 if (newlb != lex_brackstack) {
1986 lex_brackstack = newlb;
1991 if (lex_formbrack) {
1995 if (oldoldbufptr == last_lop)
1996 lex_brackstack[lex_brackets++] = XTERM;
1998 lex_brackstack[lex_brackets++] = XOPERATOR;
1999 OPERATOR(HASHBRACK);
2001 while (s < bufend && (*s == ' ' || *s == '\t'))
2005 if (d < bufend && *d == '-') {
2008 while (d < bufend && (*d == ' ' || *d == '\t'))
2011 if (d < bufend && isIDFIRST(*d)) {
2012 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
2014 while (d < bufend && (*d == ' ' || *d == '\t'))
2017 char minus = (tokenbuf[0] == '-');
2019 (keyword(tokenbuf + 1, len) ||
2020 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
2021 perl_get_cv(tokenbuf + 1, FALSE) ))
2022 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
2023 tokenbuf + !minus, tokenbuf + !minus);
2024 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2031 lex_brackstack[lex_brackets++] = XSTATE;
2035 lex_brackstack[lex_brackets++] = XOPERATOR;
2040 if (oldoldbufptr == last_lop)
2041 lex_brackstack[lex_brackets++] = XTERM;
2043 lex_brackstack[lex_brackets++] = XOPERATOR;
2046 if (expect == XSTATE) {
2047 lex_brackstack[lex_brackets-1] = XSTATE;
2050 OPERATOR(HASHBRACK);
2052 /* This hack serves to disambiguate a pair of curlies
2053 * as being a block or an anon hash. Normally, expectation
2054 * determines that, but in cases where we're not in a
2055 * position to expect anything in particular (like inside
2056 * eval"") we have to resolve the ambiguity. This code
2057 * covers the case where the first term in the curlies is a
2058 * quoted string. Most other cases need to be explicitly
2059 * disambiguated by prepending a `+' before the opening
2060 * curly in order to force resolution as an anon hash.
2062 * XXX should probably propagate the outer expectation
2063 * into eval"" to rely less on this hack, but that could
2064 * potentially break current behavior of eval"".
2068 if (*s == '\'' || *s == '"' || *s == '`') {
2069 /* common case: get past first string, handling escapes */
2070 for (t++; t < bufend && *t != *s;)
2071 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2075 else if (*s == 'q') {
2078 || ((*t == 'q' || *t == 'x') && ++t < bufend
2079 && !isALNUM(*t)))) {
2081 char open, close, term;
2084 while (t < bufend && isSPACE(*t))
2088 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2092 for (t++; t < bufend; t++) {
2093 if (*t == '\\' && t+1 < bufend && open != '\\')
2095 else if (*t == open)
2099 for (t++; t < bufend; t++) {
2100 if (*t == '\\' && t+1 < bufend)
2102 else if (*t == close && --brackets <= 0)
2104 else if (*t == open)
2110 else if (isALPHA(*s)) {
2111 for (t++; t < bufend && isALNUM(*t); t++) ;
2113 while (t < bufend && isSPACE(*t))
2115 /* if comma follows first term, call it an anon hash */
2116 /* XXX it could be a comma expression with loop modifiers */
2117 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2118 || (*t == '=' && t[1] == '>')))
2119 OPERATOR(HASHBRACK);
2123 lex_brackstack[lex_brackets-1] = XSTATE;
2129 yylval.ival = curcop->cop_line;
2130 if (isSPACE(*s) || *s == '#')
2131 copline = NOLINE; /* invalidate current command line number */
2136 if (lex_brackets <= 0)
2137 yyerror("Unmatched right bracket");
2139 expect = (expectation)lex_brackstack[--lex_brackets];
2140 if (lex_brackets < lex_formbrack)
2142 if (lex_state == LEX_INTERPNORMAL) {
2143 if (lex_brackets == 0) {
2144 if (lex_fakebrack) {
2145 lex_state = LEX_INTERPEND;
2147 return yylex(); /* ignore fake brackets */
2149 if (*s == '-' && s[1] == '>')
2150 lex_state = LEX_INTERPENDMAYBE;
2151 else if (*s != '[' && *s != '{')
2152 lex_state = LEX_INTERPEND;
2155 if (lex_brackets < lex_fakebrack) {
2158 return yylex(); /* ignore fake brackets */
2168 if (expect == XOPERATOR) {
2169 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2177 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2180 force_ident(tokenbuf, '&');
2184 yylval.ival = (OPpENTERSUB_AMPER<<8);
2203 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2204 warn("Reversed %c= operator",(int)tmp);
2206 if (expect == XSTATE && isALPHA(tmp) &&
2207 (s == linestart+1 || s[-2] == '\n') )
2209 if (in_eval && !rsfp) {
2214 if (strnEQ(s,"=cut",4)) {
2231 if (lex_brackets < lex_formbrack) {
2233 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2234 if (*t == '\n' || *t == '#') {
2252 if (expect != XOPERATOR) {
2253 if (s[1] != '<' && !strchr(s,'>'))
2256 s = scan_heredoc(s);
2258 s = scan_inputsymbol(s);
2259 TERM(sublex_start());
2264 SHop(OP_LEFT_SHIFT);
2278 SHop(OP_RIGHT_SHIFT);
2287 if (expect == XOPERATOR) {
2288 if (lex_formbrack && lex_brackets == lex_formbrack) {
2291 return ','; /* grandfather non-comma-format format */
2295 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2296 if (expect == XOPERATOR)
2297 no_op("Array length", bufptr);
2299 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2304 pending_ident = '#';
2308 if (expect == XOPERATOR)
2309 no_op("Scalar", bufptr);
2311 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2314 yyerror("Final $ should be \\$ or $name");
2318 /* This kludge not intended to be bulletproof. */
2319 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2320 yylval.opval = newSVOP(OP_CONST, 0,
2321 newSViv((IV)compiling.cop_arybase));
2322 yylval.opval->op_private = OPpCONST_ARYBASE;
2327 if (lex_state == LEX_NORMAL)
2330 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2336 isSPACE(*t) || isALNUM(*t) || *t == '$';
2339 bufptr = skipspace(bufptr);
2340 while (t < bufend && *t != ']')
2342 warn("Multidimensional syntax %.*s not supported",
2343 (t - bufptr) + 1, bufptr);
2347 else if (*s == '{') {
2349 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2350 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2352 char tmpbuf[sizeof tokenbuf];
2354 for (t++; isSPACE(*t); t++) ;
2355 if (isIDFIRST(*t)) {
2356 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2357 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2358 warn("You need to quote \"%s\"", tmpbuf);
2365 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2366 bool islop = (last_lop == oldoldbufptr);
2367 if (!islop || last_lop_op == OP_GREPSTART)
2369 else if (strchr("$@\"'`q", *s))
2370 expect = XTERM; /* e.g. print $fh "foo" */
2371 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2372 expect = XTERM; /* e.g. print $fh &sub */
2373 else if (isIDFIRST(*s)) {
2374 char tmpbuf[sizeof tokenbuf];
2375 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2376 if (tmp = keyword(tmpbuf, len)) {
2377 /* binary operators exclude handle interpretations */
2389 expect = XTERM; /* e.g. print $fh length() */
2394 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2395 if (gv && GvCVu(gv))
2396 expect = XTERM; /* e.g. print $fh subr() */
2399 else if (isDIGIT(*s))
2400 expect = XTERM; /* e.g. print $fh 3 */
2401 else if (*s == '.' && isDIGIT(s[1]))
2402 expect = XTERM; /* e.g. print $fh .3 */
2403 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2404 expect = XTERM; /* e.g. print $fh -1 */
2405 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2406 expect = XTERM; /* print $fh <<"EOF" */
2408 pending_ident = '$';
2412 if (expect == XOPERATOR)
2415 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2418 yyerror("Final @ should be \\@ or @name");
2421 if (lex_state == LEX_NORMAL)
2423 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2427 /* Warn about @ where they meant $. */
2429 if (*s == '[' || *s == '{') {
2431 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2433 if (*t == '}' || *t == ']') {
2435 bufptr = skipspace(bufptr);
2436 warn("Scalar value %.*s better written as $%.*s",
2437 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2442 pending_ident = '@';
2445 case '/': /* may either be division or pattern */
2446 case '?': /* may either be conditional or pattern */
2447 if (expect != XOPERATOR) {
2448 /* Disable warning on "study /blah/" */
2449 if (oldoldbufptr == last_uni
2450 && (*last_uni != 's' || s - last_uni < 5
2451 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2454 TERM(sublex_start());
2462 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2463 (s == linestart || s[-1] == '\n') ) {
2468 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2474 yylval.ival = OPf_SPECIAL;
2480 if (expect != XOPERATOR)
2485 case '0': case '1': case '2': case '3': case '4':
2486 case '5': case '6': case '7': case '8': case '9':
2488 if (expect == XOPERATOR)
2494 if (expect == XOPERATOR) {
2495 if (lex_formbrack && lex_brackets == lex_formbrack) {
2498 return ','; /* grandfather non-comma-format format */
2504 missingterm((char*)0);
2505 yylval.ival = OP_CONST;
2506 TERM(sublex_start());
2510 if (expect == XOPERATOR) {
2511 if (lex_formbrack && lex_brackets == lex_formbrack) {
2514 return ','; /* grandfather non-comma-format format */
2520 missingterm((char*)0);
2521 yylval.ival = OP_CONST;
2522 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2523 if (*d == '$' || *d == '@' || *d == '\\') {
2524 yylval.ival = OP_STRINGIFY;
2528 TERM(sublex_start());
2532 if (expect == XOPERATOR)
2533 no_op("Backticks",s);
2535 missingterm((char*)0);
2536 yylval.ival = OP_BACKTICK;
2538 TERM(sublex_start());
2542 if (dowarn && lex_inwhat && isDIGIT(*s))
2543 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2544 if (expect == XOPERATOR)
2545 no_op("Backslash",s);
2549 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2588 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2590 /* Some keywords can be followed by any delimiter, including ':' */
2591 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2592 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2593 (tokenbuf[0] == 'q' &&
2594 strchr("qwx", tokenbuf[1]))));
2596 /* x::* is just a word, unless x is "CORE" */
2597 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2601 while (d < bufend && isSPACE(*d))
2602 d++; /* no comments skipped here, or s### is misparsed */
2604 /* Is this a label? */
2605 if (!tmp && expect == XSTATE
2606 && d < bufend && *d == ':' && *(d + 1) != ':') {
2608 yylval.pval = savepv(tokenbuf);
2613 /* Check for keywords */
2614 tmp = keyword(tokenbuf, len);
2616 /* Is this a word before a => operator? */
2617 if (strnEQ(d,"=>",2)) {
2619 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2620 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2621 tokenbuf, tokenbuf);
2622 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2623 yylval.opval->op_private = OPpCONST_BARE;
2627 if (tmp < 0) { /* second-class keyword? */
2628 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2629 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2630 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2631 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2632 (gv = *gvp) != (GV*)&sv_undef &&
2633 GvCVu(gv) && GvIMPORTED_CV(gv))))
2635 tmp = 0; /* overridden by importation */
2638 && -tmp==KEY_lock /* XXX generalizable kludge */
2639 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2641 tmp = 0; /* any sub overrides "weak" keyword */
2644 tmp = -tmp; gv = Nullgv; gvp = 0;
2651 default: /* not a keyword */
2654 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2656 /* Get the rest if it looks like a package qualifier */
2658 if (*s == '\'' || *s == ':' && s[1] == ':') {
2659 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2662 croak("Bad name after %s::", tokenbuf);
2665 if (expect == XOPERATOR) {
2666 if (bufptr == linestart) {
2672 no_op("Bareword",s);
2675 /* Look for a subroutine with this name in current package. */
2678 sv = newSVpv("CORE::GLOBAL::",14);
2679 sv_catpv(sv,tokenbuf);
2682 sv = newSVpv(tokenbuf,0);
2684 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2686 /* Presume this is going to be a bareword of some sort. */
2689 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2690 yylval.opval->op_private = OPpCONST_BARE;
2692 /* See if it's the indirect object for a list operator. */
2695 oldoldbufptr < bufptr &&
2696 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2697 /* NO SKIPSPACE BEFORE HERE! */
2699 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2701 bool immediate_paren = *s == '(';
2703 /* (Now we can afford to cross potential line boundary.) */
2706 /* Two barewords in a row may indicate method call. */
2708 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2711 /* If not a declared subroutine, it's an indirect object. */
2712 /* (But it's an indir obj regardless for sort.) */
2714 if ((last_lop_op == OP_SORT ||
2715 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2716 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2717 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2722 /* If followed by a paren, it's certainly a subroutine. */
2728 if (gv && GvCVu(gv)) {
2729 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2730 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2735 nextval[nexttoke].opval = yylval.opval;
2742 /* If followed by var or block, call it a method (unless sub) */
2744 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2745 last_lop = oldbufptr;
2746 last_lop_op = OP_METHOD;
2750 /* If followed by a bareword, see if it looks like indir obj. */
2752 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2755 /* Not a method, so call it a subroutine (if defined) */
2757 if (gv && GvCVu(gv)) {
2759 if (lastchar == '-')
2760 warn("Ambiguous use of -%s resolved as -&%s()",
2761 tokenbuf, tokenbuf);
2762 last_lop = oldbufptr;
2763 last_lop_op = OP_ENTERSUB;
2764 /* Check for a constant sub */
2766 if ((sv = cv_const_sv(cv))) {
2768 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2769 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2770 yylval.opval->op_private = 0;
2774 /* Resolve to GV now. */
2775 op_free(yylval.opval);
2776 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2777 /* Is there a prototype? */
2780 char *proto = SvPV((SV*)cv, len);
2783 if (strEQ(proto, "$"))
2785 if (*proto == '&' && *s == '{') {
2786 sv_setpv(subname,"__ANON__");
2790 nextval[nexttoke].opval = yylval.opval;
2796 if (hints & HINT_STRICT_SUBS &&
2799 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2800 last_lop_op != OP_ACCEPT &&
2801 last_lop_op != OP_PIPE_OP &&
2802 last_lop_op != OP_SOCKPAIR)
2805 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2810 /* Call it a bare word */
2814 if (lastchar != '-') {
2815 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2817 warn(warn_reserved, tokenbuf);
2820 if (lastchar && strchr("*%&", lastchar)) {
2821 warn("Operator or semicolon missing before %c%s",
2822 lastchar, tokenbuf);
2823 warn("Ambiguous use of %c resolved as operator %c",
2824 lastchar, lastchar);
2830 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2831 newSVsv(GvSV(curcop->cop_filegv)));
2835 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2836 newSVpvf("%ld", (long)curcop->cop_line));
2839 case KEY___PACKAGE__:
2840 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2842 ? newSVsv(curstname)
2851 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2852 char *pname = "main";
2853 if (tokenbuf[2] == 'D')
2854 pname = HvNAME(curstash ? curstash : defstash);
2855 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2858 GvIOp(gv) = newIO();
2859 IoIFP(GvIOp(gv)) = rsfp;
2860 #if defined(HAS_FCNTL) && defined(F_SETFD)
2862 int fd = PerlIO_fileno(rsfp);
2863 fcntl(fd,F_SETFD,fd >= 3);
2866 /* Mark this internal pseudo-handle as clean */
2867 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2869 IoTYPE(GvIOp(gv)) = '|';
2870 else if ((PerlIO*)rsfp == PerlIO_stdin())
2871 IoTYPE(GvIOp(gv)) = '-';
2873 IoTYPE(GvIOp(gv)) = '<';
2884 if (expect == XSTATE) {
2891 if (*s == ':' && s[1] == ':') {
2894 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2895 tmp = keyword(tokenbuf, len);
2909 LOP(OP_ACCEPT,XTERM);
2915 LOP(OP_ATAN2,XTERM);
2924 LOP(OP_BLESS,XTERM);
2933 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2953 LOP(OP_CRYPT,XTERM);
2957 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2958 if (*d != '0' && isDIGIT(*d))
2959 yywarn("chmod: mode argument is missing initial 0");
2961 LOP(OP_CHMOD,XTERM);
2964 LOP(OP_CHOWN,XTERM);
2967 LOP(OP_CONNECT,XTERM);
2983 s = force_word(s,WORD,FALSE,TRUE,FALSE);
2987 hints |= HINT_BLOCK_SCOPE;
2997 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
2998 LOP(OP_DBMOPEN,XTERM);
3004 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3011 yylval.ival = curcop->cop_line;
3025 expect = (*s == '{') ? XTERMBLOCK : XTERM;
3026 UNIBRACK(OP_ENTEREVAL);
3041 case KEY_endhostent:
3047 case KEY_endservent:
3050 case KEY_endprotoent:
3061 yylval.ival = curcop->cop_line;
3063 if (isIDFIRST(*s)) {
3065 if ((bufend - p) >= 3 &&
3066 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3070 croak("Missing $ on loop variable");
3075 LOP(OP_FORMLINE,XTERM);
3081 LOP(OP_FCNTL,XTERM);
3087 LOP(OP_FLOCK,XTERM);
3096 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3099 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3114 case KEY_getpriority:
3115 LOP(OP_GETPRIORITY,XTERM);
3117 case KEY_getprotobyname:
3120 case KEY_getprotobynumber:
3121 LOP(OP_GPBYNUMBER,XTERM);
3123 case KEY_getprotoent:
3135 case KEY_getpeername:
3136 UNI(OP_GETPEERNAME);
3138 case KEY_gethostbyname:
3141 case KEY_gethostbyaddr:
3142 LOP(OP_GHBYADDR,XTERM);
3144 case KEY_gethostent:
3147 case KEY_getnetbyname:
3150 case KEY_getnetbyaddr:
3151 LOP(OP_GNBYADDR,XTERM);
3156 case KEY_getservbyname:
3157 LOP(OP_GSBYNAME,XTERM);
3159 case KEY_getservbyport:
3160 LOP(OP_GSBYPORT,XTERM);
3162 case KEY_getservent:
3165 case KEY_getsockname:
3166 UNI(OP_GETSOCKNAME);
3168 case KEY_getsockopt:
3169 LOP(OP_GSOCKOPT,XTERM);
3191 yylval.ival = curcop->cop_line;
3195 LOP(OP_INDEX,XTERM);
3201 LOP(OP_IOCTL,XTERM);
3213 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3244 LOP(OP_LISTEN,XTERM);
3254 TERM(sublex_start());
3257 LOP(OP_MAPSTART,XREF);
3260 LOP(OP_MKDIR,XTERM);
3263 LOP(OP_MSGCTL,XTERM);
3266 LOP(OP_MSGGET,XTERM);
3269 LOP(OP_MSGRCV,XTERM);
3272 LOP(OP_MSGSND,XTERM);
3277 if (isIDFIRST(*s)) {
3278 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3279 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3283 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3290 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3297 if (expect != XSTATE)
3298 yyerror("\"no\" not allowed in expression");
3299 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3300 s = force_version(s);
3309 if (isIDFIRST(*s)) {
3311 for (d = s; isALNUM(*d); d++) ;
3313 if (strchr("|&*+-=!?:.", *t))
3314 warn("Precedence problem: open %.*s should be open(%.*s)",
3320 yylval.ival = OP_OR;
3330 LOP(OP_OPEN_DIR,XTERM);
3333 checkcomma(s,tokenbuf,"filehandle");
3337 checkcomma(s,tokenbuf,"filehandle");
3356 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3360 LOP(OP_PIPE_OP,XTERM);
3365 missingterm((char*)0);
3366 yylval.ival = OP_CONST;
3367 TERM(sublex_start());
3375 missingterm((char*)0);
3376 if (dowarn && SvLEN(lex_stuff)) {
3377 d = SvPV_force(lex_stuff, len);
3378 for (; len; --len, ++d) {
3380 warn("Possible attempt to separate words with commas");
3384 warn("Possible attempt to put comments in qw() list");
3390 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3394 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3397 yylval.ival = OP_SPLIT;
3401 last_lop = oldbufptr;
3402 last_lop_op = OP_SPLIT;
3408 missingterm((char*)0);
3409 yylval.ival = OP_STRINGIFY;
3410 if (SvIVX(lex_stuff) == '\'')
3411 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3412 TERM(sublex_start());
3417 missingterm((char*)0);
3418 yylval.ival = OP_BACKTICK;
3420 TERM(sublex_start());
3427 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3428 if (isIDFIRST(*tokenbuf))
3429 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3431 yyerror("<> should be quotes");
3438 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3442 LOP(OP_RENAME,XTERM);
3451 LOP(OP_RINDEX,XTERM);
3474 LOP(OP_REVERSE,XTERM);
3485 TERM(sublex_start());
3487 TOKEN(1); /* force error */
3496 LOP(OP_SELECT,XTERM);
3502 LOP(OP_SEMCTL,XTERM);
3505 LOP(OP_SEMGET,XTERM);
3508 LOP(OP_SEMOP,XTERM);
3514 LOP(OP_SETPGRP,XTERM);
3516 case KEY_setpriority:
3517 LOP(OP_SETPRIORITY,XTERM);
3519 case KEY_sethostent:
3525 case KEY_setservent:
3528 case KEY_setprotoent:
3538 LOP(OP_SEEKDIR,XTERM);
3540 case KEY_setsockopt:
3541 LOP(OP_SSOCKOPT,XTERM);
3547 LOP(OP_SHMCTL,XTERM);
3550 LOP(OP_SHMGET,XTERM);
3553 LOP(OP_SHMREAD,XTERM);
3556 LOP(OP_SHMWRITE,XTERM);
3559 LOP(OP_SHUTDOWN,XTERM);
3568 LOP(OP_SOCKET,XTERM);
3570 case KEY_socketpair:
3571 LOP(OP_SOCKPAIR,XTERM);
3574 checkcomma(s,tokenbuf,"subroutine name");
3576 if (*s == ';' || *s == ')') /* probably a close */
3577 croak("sort is now a reserved word");
3579 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3583 LOP(OP_SPLIT,XTERM);
3586 LOP(OP_SPRINTF,XTERM);
3589 LOP(OP_SPLICE,XTERM);
3605 LOP(OP_SUBSTR,XTERM);
3612 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3613 char tmpbuf[sizeof tokenbuf];
3615 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3616 if (strchr(tmpbuf, ':'))
3617 sv_setpv(subname, tmpbuf);
3619 sv_setsv(subname,curstname);
3620 sv_catpvn(subname,"::",2);
3621 sv_catpvn(subname,tmpbuf,len);
3623 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3627 expect = XTERMBLOCK;
3628 sv_setpv(subname,"?");
3631 if (tmp == KEY_format) {
3634 lex_formbrack = lex_brackets + 1;
3638 /* Look for a prototype */
3645 SvREFCNT_dec(lex_stuff);
3647 croak("Prototype not terminated");
3650 d = SvPVX(lex_stuff);
3652 for (p = d; *p; ++p) {
3657 SvCUR(lex_stuff) = tmp;
3660 nextval[1] = nextval[0];
3661 nexttype[1] = nexttype[0];
3662 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3663 nexttype[0] = THING;
3664 if (nexttoke == 1) {
3665 lex_defer = lex_state;
3666 lex_expect = expect;
3667 lex_state = LEX_KNOWNEXT;
3672 if (*SvPV(subname,na) == '?') {
3673 sv_setpv(subname,"__ANON__");
3680 LOP(OP_SYSTEM,XREF);
3683 LOP(OP_SYMLINK,XTERM);
3686 LOP(OP_SYSCALL,XTERM);
3689 LOP(OP_SYSOPEN,XTERM);
3692 LOP(OP_SYSSEEK,XTERM);
3695 LOP(OP_SYSREAD,XTERM);
3698 LOP(OP_SYSWRITE,XTERM);
3702 TERM(sublex_start());
3723 LOP(OP_TRUNCATE,XTERM);
3735 yylval.ival = curcop->cop_line;
3739 yylval.ival = curcop->cop_line;
3743 LOP(OP_UNLINK,XTERM);
3749 LOP(OP_UNPACK,XTERM);
3752 LOP(OP_UTIME,XTERM);
3756 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3757 if (*d != '0' && isDIGIT(*d))
3758 yywarn("umask: argument is missing initial 0");
3763 LOP(OP_UNSHIFT,XTERM);
3766 if (expect != XSTATE)
3767 yyerror("\"use\" not allowed in expression");
3770 s = force_version(s);
3771 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3772 nextval[nexttoke].opval = Nullop;
3777 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3778 s = force_version(s);
3791 yylval.ival = curcop->cop_line;
3795 hints |= HINT_BLOCK_SCOPE;
3802 LOP(OP_WAITPID,XTERM);
3808 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3812 if (expect == XOPERATOR)
3818 yylval.ival = OP_XOR;
3823 TERM(sublex_start());
3829 keyword(register char *d, I32 len)
3834 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3835 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3836 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3837 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3838 if (strEQ(d,"__END__")) return KEY___END__;
3842 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3847 if (strEQ(d,"and")) return -KEY_and;
3848 if (strEQ(d,"abs")) return -KEY_abs;
3851 if (strEQ(d,"alarm")) return -KEY_alarm;
3852 if (strEQ(d,"atan2")) return -KEY_atan2;
3855 if (strEQ(d,"accept")) return -KEY_accept;
3860 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3863 if (strEQ(d,"bless")) return -KEY_bless;
3864 if (strEQ(d,"bind")) return -KEY_bind;
3865 if (strEQ(d,"binmode")) return -KEY_binmode;
3868 if (strEQ(d,"CORE")) return -KEY_CORE;
3873 if (strEQ(d,"cmp")) return -KEY_cmp;
3874 if (strEQ(d,"chr")) return -KEY_chr;
3875 if (strEQ(d,"cos")) return -KEY_cos;
3878 if (strEQ(d,"chop")) return KEY_chop;
3881 if (strEQ(d,"close")) return -KEY_close;
3882 if (strEQ(d,"chdir")) return -KEY_chdir;
3883 if (strEQ(d,"chomp")) return KEY_chomp;
3884 if (strEQ(d,"chmod")) return -KEY_chmod;
3885 if (strEQ(d,"chown")) return -KEY_chown;
3886 if (strEQ(d,"crypt")) return -KEY_crypt;
3889 if (strEQ(d,"chroot")) return -KEY_chroot;
3890 if (strEQ(d,"caller")) return -KEY_caller;
3893 if (strEQ(d,"connect")) return -KEY_connect;
3896 if (strEQ(d,"closedir")) return -KEY_closedir;
3897 if (strEQ(d,"continue")) return -KEY_continue;
3902 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3907 if (strEQ(d,"do")) return KEY_do;
3910 if (strEQ(d,"die")) return -KEY_die;
3913 if (strEQ(d,"dump")) return -KEY_dump;
3916 if (strEQ(d,"delete")) return KEY_delete;
3919 if (strEQ(d,"defined")) return KEY_defined;
3920 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3923 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3928 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3929 if (strEQ(d,"END")) return KEY_END;
3934 if (strEQ(d,"eq")) return -KEY_eq;
3937 if (strEQ(d,"eof")) return -KEY_eof;
3938 if (strEQ(d,"exp")) return -KEY_exp;
3941 if (strEQ(d,"else")) return KEY_else;
3942 if (strEQ(d,"exit")) return -KEY_exit;
3943 if (strEQ(d,"eval")) return KEY_eval;
3944 if (strEQ(d,"exec")) return -KEY_exec;
3945 if (strEQ(d,"each")) return KEY_each;
3948 if (strEQ(d,"elsif")) return KEY_elsif;
3951 if (strEQ(d,"exists")) return KEY_exists;
3952 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3955 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3956 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3959 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3962 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3963 if (strEQ(d,"endservent")) return -KEY_endservent;
3966 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3973 if (strEQ(d,"for")) return KEY_for;
3976 if (strEQ(d,"fork")) return -KEY_fork;
3979 if (strEQ(d,"fcntl")) return -KEY_fcntl;
3980 if (strEQ(d,"flock")) return -KEY_flock;
3983 if (strEQ(d,"format")) return KEY_format;
3984 if (strEQ(d,"fileno")) return -KEY_fileno;
3987 if (strEQ(d,"foreach")) return KEY_foreach;
3990 if (strEQ(d,"formline")) return -KEY_formline;
3996 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
3997 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4001 if (strnEQ(d,"get",3)) {
4006 if (strEQ(d,"ppid")) return -KEY_getppid;
4007 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4010 if (strEQ(d,"pwent")) return -KEY_getpwent;
4011 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4012 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4015 if (strEQ(d,"peername")) return -KEY_getpeername;
4016 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4017 if (strEQ(d,"priority")) return -KEY_getpriority;
4020 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4023 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4027 else if (*d == 'h') {
4028 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4029 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4030 if (strEQ(d,"hostent")) return -KEY_gethostent;
4032 else if (*d == 'n') {
4033 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4034 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4035 if (strEQ(d,"netent")) return -KEY_getnetent;
4037 else if (*d == 's') {
4038 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4039 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4040 if (strEQ(d,"servent")) return -KEY_getservent;
4041 if (strEQ(d,"sockname")) return -KEY_getsockname;
4042 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4044 else if (*d == 'g') {
4045 if (strEQ(d,"grent")) return -KEY_getgrent;
4046 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4047 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4049 else if (*d == 'l') {
4050 if (strEQ(d,"login")) return -KEY_getlogin;
4052 else if (strEQ(d,"c")) return -KEY_getc;
4057 if (strEQ(d,"gt")) return -KEY_gt;
4058 if (strEQ(d,"ge")) return -KEY_ge;
4061 if (strEQ(d,"grep")) return KEY_grep;
4062 if (strEQ(d,"goto")) return KEY_goto;
4063 if (strEQ(d,"glob")) return KEY_glob;
4066 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4071 if (strEQ(d,"hex")) return -KEY_hex;
4074 if (strEQ(d,"INIT")) return KEY_INIT;
4079 if (strEQ(d,"if")) return KEY_if;
4082 if (strEQ(d,"int")) return -KEY_int;
4085 if (strEQ(d,"index")) return -KEY_index;
4086 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4091 if (strEQ(d,"join")) return -KEY_join;
4095 if (strEQ(d,"keys")) return KEY_keys;
4096 if (strEQ(d,"kill")) return -KEY_kill;
4101 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4102 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4108 if (strEQ(d,"lt")) return -KEY_lt;
4109 if (strEQ(d,"le")) return -KEY_le;
4110 if (strEQ(d,"lc")) return -KEY_lc;
4113 if (strEQ(d,"log")) return -KEY_log;
4116 if (strEQ(d,"last")) return KEY_last;
4117 if (strEQ(d,"link")) return -KEY_link;
4118 if (strEQ(d,"lock")) return -KEY_lock;
4121 if (strEQ(d,"local")) return KEY_local;
4122 if (strEQ(d,"lstat")) return -KEY_lstat;
4125 if (strEQ(d,"length")) return -KEY_length;
4126 if (strEQ(d,"listen")) return -KEY_listen;
4129 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4132 if (strEQ(d,"localtime")) return -KEY_localtime;
4138 case 1: return KEY_m;
4140 if (strEQ(d,"my")) return KEY_my;
4143 if (strEQ(d,"map")) return KEY_map;
4146 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4149 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4150 if (strEQ(d,"msgget")) return -KEY_msgget;
4151 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4152 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4157 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4160 if (strEQ(d,"next")) return KEY_next;
4161 if (strEQ(d,"ne")) return -KEY_ne;
4162 if (strEQ(d,"not")) return -KEY_not;
4163 if (strEQ(d,"no")) return KEY_no;
4168 if (strEQ(d,"or")) return -KEY_or;
4171 if (strEQ(d,"ord")) return -KEY_ord;
4172 if (strEQ(d,"oct")) return -KEY_oct;
4175 if (strEQ(d,"open")) return -KEY_open;
4178 if (strEQ(d,"opendir")) return -KEY_opendir;
4185 if (strEQ(d,"pop")) return KEY_pop;
4186 if (strEQ(d,"pos")) return KEY_pos;
4189 if (strEQ(d,"push")) return KEY_push;
4190 if (strEQ(d,"pack")) return -KEY_pack;
4191 if (strEQ(d,"pipe")) return -KEY_pipe;
4194 if (strEQ(d,"print")) return KEY_print;
4197 if (strEQ(d,"printf")) return KEY_printf;
4200 if (strEQ(d,"package")) return KEY_package;
4203 if (strEQ(d,"prototype")) return KEY_prototype;
4208 if (strEQ(d,"q")) return KEY_q;
4209 if (strEQ(d,"qq")) return KEY_qq;
4210 if (strEQ(d,"qw")) return KEY_qw;
4211 if (strEQ(d,"qx")) return KEY_qx;
4213 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4218 if (strEQ(d,"ref")) return -KEY_ref;
4221 if (strEQ(d,"read")) return -KEY_read;
4222 if (strEQ(d,"rand")) return -KEY_rand;
4223 if (strEQ(d,"recv")) return -KEY_recv;
4224 if (strEQ(d,"redo")) return KEY_redo;
4227 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4228 if (strEQ(d,"reset")) return -KEY_reset;
4231 if (strEQ(d,"return")) return KEY_return;
4232 if (strEQ(d,"rename")) return -KEY_rename;
4233 if (strEQ(d,"rindex")) return -KEY_rindex;
4236 if (strEQ(d,"require")) return -KEY_require;
4237 if (strEQ(d,"reverse")) return -KEY_reverse;
4238 if (strEQ(d,"readdir")) return -KEY_readdir;
4241 if (strEQ(d,"readlink")) return -KEY_readlink;
4242 if (strEQ(d,"readline")) return -KEY_readline;
4243 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4246 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4252 case 0: return KEY_s;
4254 if (strEQ(d,"scalar")) return KEY_scalar;
4259 if (strEQ(d,"seek")) return -KEY_seek;
4260 if (strEQ(d,"send")) return -KEY_send;
4263 if (strEQ(d,"semop")) return -KEY_semop;
4266 if (strEQ(d,"select")) return -KEY_select;
4267 if (strEQ(d,"semctl")) return -KEY_semctl;
4268 if (strEQ(d,"semget")) return -KEY_semget;
4271 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4272 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4275 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4276 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4279 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4282 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4283 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4284 if (strEQ(d,"setservent")) return -KEY_setservent;
4287 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4288 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4295 if (strEQ(d,"shift")) return KEY_shift;
4298 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4299 if (strEQ(d,"shmget")) return -KEY_shmget;
4302 if (strEQ(d,"shmread")) return -KEY_shmread;
4305 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4306 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4311 if (strEQ(d,"sin")) return -KEY_sin;
4314 if (strEQ(d,"sleep")) return -KEY_sleep;
4317 if (strEQ(d,"sort")) return KEY_sort;
4318 if (strEQ(d,"socket")) return -KEY_socket;
4319 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4322 if (strEQ(d,"split")) return KEY_split;
4323 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4324 if (strEQ(d,"splice")) return KEY_splice;
4327 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4330 if (strEQ(d,"srand")) return -KEY_srand;
4333 if (strEQ(d,"stat")) return -KEY_stat;
4334 if (strEQ(d,"study")) return KEY_study;
4337 if (strEQ(d,"substr")) return -KEY_substr;
4338 if (strEQ(d,"sub")) return KEY_sub;
4343 if (strEQ(d,"system")) return -KEY_system;
4346 if (strEQ(d,"symlink")) return -KEY_symlink;
4347 if (strEQ(d,"syscall")) return -KEY_syscall;
4348 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4349 if (strEQ(d,"sysread")) return -KEY_sysread;
4350 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4353 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4362 if (strEQ(d,"tr")) return KEY_tr;
4365 if (strEQ(d,"tie")) return KEY_tie;
4368 if (strEQ(d,"tell")) return -KEY_tell;
4369 if (strEQ(d,"tied")) return KEY_tied;
4370 if (strEQ(d,"time")) return -KEY_time;
4373 if (strEQ(d,"times")) return -KEY_times;
4376 if (strEQ(d,"telldir")) return -KEY_telldir;
4379 if (strEQ(d,"truncate")) return -KEY_truncate;
4386 if (strEQ(d,"uc")) return -KEY_uc;
4389 if (strEQ(d,"use")) return KEY_use;
4392 if (strEQ(d,"undef")) return KEY_undef;
4393 if (strEQ(d,"until")) return KEY_until;
4394 if (strEQ(d,"untie")) return KEY_untie;
4395 if (strEQ(d,"utime")) return -KEY_utime;
4396 if (strEQ(d,"umask")) return -KEY_umask;
4399 if (strEQ(d,"unless")) return KEY_unless;
4400 if (strEQ(d,"unpack")) return -KEY_unpack;
4401 if (strEQ(d,"unlink")) return -KEY_unlink;
4404 if (strEQ(d,"unshift")) return KEY_unshift;
4405 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4410 if (strEQ(d,"values")) return -KEY_values;
4411 if (strEQ(d,"vec")) return -KEY_vec;
4416 if (strEQ(d,"warn")) return -KEY_warn;
4417 if (strEQ(d,"wait")) return -KEY_wait;
4420 if (strEQ(d,"while")) return KEY_while;
4421 if (strEQ(d,"write")) return -KEY_write;
4424 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4427 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4432 if (len == 1) return -KEY_x;
4433 if (strEQ(d,"xor")) return -KEY_xor;
4436 if (len == 1) return KEY_y;
4445 checkcomma(register char *s, char *name, char *what)
4449 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4451 for (w = s+2; *w && level; w++) {
4458 for (; *w && isSPACE(*w); w++) ;
4459 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4460 warn("%s (...) interpreted as function",name);
4462 while (s < bufend && isSPACE(*s))
4466 while (s < bufend && isSPACE(*s))
4468 if (isIDFIRST(*s)) {
4472 while (s < bufend && isSPACE(*s))
4477 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4481 croak("No comma allowed after %s", what);
4487 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4489 register char *d = dest;
4490 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4493 croak(ident_too_long);
4496 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4501 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4514 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4521 if (lex_brackets == 0)
4526 e = d + destlen - 3; /* two-character token, ending NUL */
4528 while (isDIGIT(*s)) {
4530 croak(ident_too_long);
4537 croak(ident_too_long);
4540 else if (*s == '\'' && isIDFIRST(s[1])) {
4545 else if (*s == ':' && s[1] == ':') {
4556 if (lex_state != LEX_NORMAL)
4557 lex_state = LEX_INTERPENDMAYBE;
4560 if (*s == '$' && s[1] &&
4561 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4563 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4564 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4577 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4582 if (isSPACE(s[-1])) {
4585 if (ch != ' ' && ch != '\t') {
4591 if (isIDFIRST(*d)) {
4593 while (isALNUM(*s) || *s == ':')
4596 while (s < send && (*s == ' ' || *s == '\t')) s++;
4597 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4598 if (dowarn && keyword(dest, d - dest)) {
4599 char *brack = *s == '[' ? "[...]" : "{...}";
4600 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4601 funny, dest, brack, funny, dest, brack);
4603 lex_fakebrack = lex_brackets+1;
4605 lex_brackstack[lex_brackets++] = XOPERATOR;
4611 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4612 lex_state = LEX_INTERPEND;
4615 if (dowarn && lex_state == LEX_NORMAL &&
4616 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4617 warn("Ambiguous use of %c{%s} resolved to %c%s",
4618 funny, dest, funny, dest);
4621 s = bracket; /* let the parser handle it */
4625 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4626 lex_state = LEX_INTERPEND;
4630 void pmflag(U16 *pmfl, int ch)
4635 *pmfl |= PMf_GLOBAL;
4637 *pmfl |= PMf_CONTINUE;
4641 *pmfl |= PMf_MULTILINE;
4643 *pmfl |= PMf_SINGLELINE;
4645 *pmfl |= PMf_EXTENDED;
4649 scan_pat(char *start)
4654 s = scan_str(start);
4657 SvREFCNT_dec(lex_stuff);
4659 croak("Search pattern not terminated");
4662 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4663 if (multi_open == '?')
4664 pm->op_pmflags |= PMf_ONCE;
4665 while (*s && strchr("iogcmsx", *s))
4666 pmflag(&pm->op_pmflags,*s++);
4667 pm->op_pmpermflags = pm->op_pmflags;
4670 yylval.ival = OP_MATCH;
4675 scan_subst(char *start)
4682 yylval.ival = OP_NULL;
4684 s = scan_str(start);
4688 SvREFCNT_dec(lex_stuff);
4690 croak("Substitution pattern not terminated");
4693 if (s[-1] == multi_open)
4696 first_start = multi_start;
4700 SvREFCNT_dec(lex_stuff);
4703 SvREFCNT_dec(lex_repl);
4705 croak("Substitution replacement not terminated");
4707 multi_start = first_start; /* so whole substitution is taken together */
4709 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4710 while (*s && strchr("iogcmsex", *s)) {
4716 pmflag(&pm->op_pmflags,*s++);
4721 pm->op_pmflags |= PMf_EVAL;
4722 repl = newSVpv("",0);
4724 sv_catpv(repl, es ? "eval " : "do ");
4725 sv_catpvn(repl, "{ ", 2);
4726 sv_catsv(repl, lex_repl);
4727 sv_catpvn(repl, " };", 2);
4728 SvCOMPILED_on(repl);
4729 SvREFCNT_dec(lex_repl);
4733 pm->op_pmpermflags = pm->op_pmflags;
4735 yylval.ival = OP_SUBST;
4740 scan_trans(char *start)
4749 yylval.ival = OP_NULL;
4751 s = scan_str(start);
4754 SvREFCNT_dec(lex_stuff);
4756 croak("Translation pattern not terminated");
4758 if (s[-1] == multi_open)
4764 SvREFCNT_dec(lex_stuff);
4767 SvREFCNT_dec(lex_repl);
4769 croak("Translation replacement not terminated");
4772 New(803,tbl,256,short);
4773 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4775 complement = Delete = squash = 0;
4776 while (*s == 'c' || *s == 'd' || *s == 's') {
4778 complement = OPpTRANS_COMPLEMENT;
4780 Delete = OPpTRANS_DELETE;
4782 squash = OPpTRANS_SQUASH;
4785 o->op_private = Delete|squash|complement;
4788 yylval.ival = OP_TRANS;
4793 scan_heredoc(register char *s)
4797 I32 op_type = OP_SCALAR;
4804 int outer = (rsfp && !lex_inwhat);
4808 e = tokenbuf + sizeof tokenbuf - 1;
4811 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4812 if (*peek && strchr("`'\"",*peek)) {
4815 s = delimcpy(d, e, s, bufend, term, &len);
4826 deprecate("bare << to mean <<\"\"");
4827 for (; isALNUM(*s); s++) {
4832 if (d >= tokenbuf + sizeof tokenbuf - 1)
4833 croak("Delimiter for here document is too long");
4838 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4839 herewas = newSVpv(s,bufend-s);
4841 s--, herewas = newSVpv(s,d-s);
4842 s += SvCUR(herewas);
4844 tmpstr = NEWSV(87,80);
4845 sv_upgrade(tmpstr, SVt_PVIV);
4850 else if (term == '`') {
4851 op_type = OP_BACKTICK;
4852 SvIVX(tmpstr) = '\\';
4856 multi_start = curcop->cop_line;
4857 multi_open = multi_close = '<';
4861 while (s < bufend &&
4862 (*s != term || memNE(s,tokenbuf,len)) ) {
4867 curcop->cop_line = multi_start;
4868 missingterm(tokenbuf);
4870 sv_setpvn(tmpstr,d+1,s-d);
4872 curcop->cop_line++; /* the preceding stmt passes a newline */
4874 sv_catpvn(herewas,s,bufend-s);
4875 sv_setsv(linestr,herewas);
4876 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4877 bufend = SvPVX(linestr) + SvCUR(linestr);
4880 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4881 while (s >= bufend) { /* multiple line string? */
4883 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4884 curcop->cop_line = multi_start;
4885 missingterm(tokenbuf);
4888 if (PERLDB_LINE && curstash != debstash) {
4889 SV *sv = NEWSV(88,0);
4891 sv_upgrade(sv, SVt_PVMG);
4892 sv_setsv(sv,linestr);
4893 av_store(GvAV(curcop->cop_filegv),
4894 (I32)curcop->cop_line,sv);
4896 bufend = SvPVX(linestr) + SvCUR(linestr);
4897 if (*s == term && memEQ(s,tokenbuf,len)) {
4900 sv_catsv(linestr,herewas);
4901 bufend = SvPVX(linestr) + SvCUR(linestr);
4905 sv_catsv(tmpstr,linestr);
4908 multi_end = curcop->cop_line;
4910 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4911 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4912 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4914 SvREFCNT_dec(herewas);
4916 yylval.ival = op_type;
4921 scan_inputsymbol(char *start)
4923 register char *s = start;
4929 e = tokenbuf + sizeof tokenbuf;
4930 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4931 if (len >= sizeof tokenbuf)
4932 croak("Excessively long <> operator");
4934 croak("Unterminated <> operator");
4936 if (*d == '$' && d[1]) d++;
4937 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4939 if (d - tokenbuf != len) {
4940 yylval.ival = OP_GLOB;
4942 s = scan_str(start);
4944 croak("Glob not terminated");
4950 (void)strcpy(d,"ARGV");
4953 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4954 OP *o = newOP(OP_PADSV, 0);
4956 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4959 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4960 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4961 newUNOP(OP_RV2GV, 0,
4962 newUNOP(OP_RV2SV, 0,
4963 newGVOP(OP_GV, 0, gv))));
4965 yylval.ival = OP_NULL;
4968 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4969 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4970 yylval.ival = OP_NULL;
4977 scan_str(char *start)
4982 register char *s = start;
4991 multi_start = curcop->cop_line;
4993 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
4998 sv_upgrade(sv, SVt_PVIV);
5000 (void)SvPOK_only(sv); /* validate pointer */
5003 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
5004 to = SvPVX(sv)+SvCUR(sv);
5005 if (multi_open == multi_close) {
5006 for (; s < bufend; s++,to++) {
5007 if (*s == '\n' && !rsfp)
5009 if (*s == '\\' && s+1 < bufend && term != '\\') {
5015 else if (*s == term)
5021 for (; s < bufend; s++,to++) {
5022 if (*s == '\n' && !rsfp)
5024 if (*s == '\\' && s+1 < bufend) {
5025 if ((s[1] == multi_open) || (s[1] == multi_close))
5030 else if (*s == multi_close && --brackets <= 0)
5032 else if (*s == multi_open)
5038 SvCUR_set(sv, to - SvPVX(sv));
5040 if (s < bufend) break; /* string ends on this line? */
5043 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5045 curcop->cop_line = multi_start;
5049 if (PERLDB_LINE && curstash != debstash) {
5050 SV *sv = NEWSV(88,0);
5052 sv_upgrade(sv, SVt_PVMG);
5053 sv_setsv(sv,linestr);
5054 av_store(GvAV(curcop->cop_filegv),
5055 (I32)curcop->cop_line, sv);
5057 bufend = SvPVX(linestr) + SvCUR(linestr);
5059 multi_end = curcop->cop_line;
5061 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5062 SvLEN_set(sv, SvCUR(sv) + 1);
5063 Renew(SvPVX(sv), SvLEN(sv), char);
5073 scan_num(char *start)
5075 register char *s = start;
5083 static char number_too_long[] = "Number too long";
5087 croak("panic: scan_num");
5092 bool overflowed = FALSE;
5098 else if (s[1] == '.')
5114 yyerror("Illegal octal digit");
5116 case '0': case '1': case '2': case '3': case '4':
5117 case '5': case '6': case '7':
5120 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5121 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5127 if (!overflowed && (n >> shift) != u) {
5128 warn("Integer overflow in %s number",
5129 (shift == 4) ? "hex" : "octal");
5141 case '1': case '2': case '3': case '4': case '5':
5142 case '6': case '7': case '8': case '9': case '.':
5145 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5147 while (isDIGIT(*s) || *s == '_') {
5149 if (dowarn && lastub && s - lastub != 3)
5150 warn("Misplaced _ in number");
5155 croak(number_too_long);
5159 if (dowarn && lastub && s - lastub != 3)
5160 warn("Misplaced _ in number");
5161 if (*s == '.' && s[1] != '.') {
5164 for (; isDIGIT(*s) || *s == '_'; s++) {
5166 croak(number_too_long);
5171 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5174 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5175 if (*s == '+' || *s == '-')
5177 while (isDIGIT(*s)) {
5179 croak(number_too_long);
5185 SET_NUMERIC_STANDARD();
5186 value = atof(tokenbuf);
5188 if (!floatit && (double)tryiv == value)
5189 sv_setiv(sv, tryiv);
5191 sv_setnv(sv, value);
5195 yylval.opval = newSVOP(OP_CONST, 0, sv);
5201 scan_formline(register char *s)
5206 SV *stuff = newSVpv("",0);
5207 bool needargs = FALSE;
5210 if (*s == '.' || *s == '}') {
5212 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5216 if (in_eval && !rsfp) {
5217 eol = strchr(s,'\n');
5222 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5224 for (t = s; t < eol; t++) {
5225 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5227 goto enough; /* ~~ must be first line in formline */
5229 if (*t == '@' || *t == '^')
5232 sv_catpvn(stuff, s, eol-s);
5236 s = filter_gets(linestr, rsfp, 0);
5237 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5238 bufend = bufptr + SvCUR(linestr);
5241 yyerror("Format not terminated");
5251 lex_state = LEX_NORMAL;
5252 nextval[nexttoke].ival = 0;
5256 lex_state = LEX_FORMLINE;
5257 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5259 nextval[nexttoke].ival = OP_FORMLINE;
5263 SvREFCNT_dec(stuff);
5275 cshlen = strlen(cshname);
5280 start_subparse(I32 is_format, U32 flags)
5283 I32 oldsavestack_ix = savestack_ix;
5284 CV* outsidecv = compcv;
5288 assert(SvTYPE(compcv) == SVt_PVCV);
5295 SAVESPTR(comppad_name);
5297 SAVEI32(comppad_name_fill);
5298 SAVEI32(min_intro_pending);
5299 SAVEI32(max_intro_pending);
5300 SAVEI32(pad_reset_pending);
5302 compcv = (CV*)NEWSV(1104,0);
5303 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5304 CvFLAGS(compcv) |= flags;
5307 av_push(comppad, Nullsv);
5308 curpad = AvARRAY(comppad);
5309 comppad_name = newAV();
5310 comppad_name_fill = 0;
5311 min_intro_pending = 0;
5313 subline = curcop->cop_line;
5315 av_store(comppad_name, 0, newSVpv("@_", 2));
5316 curpad[0] = (SV*)newAV();
5317 SvPADMY_on(curpad[0]); /* XXX Needed? */
5318 CvOWNER(compcv) = 0;
5319 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5320 MUTEX_INIT(CvMUTEXP(compcv));
5321 #endif /* USE_THREADS */
5323 comppadlist = newAV();
5324 AvREAL_off(comppadlist);
5325 av_store(comppadlist, 0, (SV*)comppad_name);
5326 av_store(comppadlist, 1, (SV*)comppad);
5328 CvPADLIST(compcv) = comppadlist;
5329 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5331 CvOWNER(compcv) = 0;
5332 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5333 MUTEX_INIT(CvMUTEXP(compcv));
5334 #endif /* USE_THREADS */
5336 return oldsavestack_ix;
5355 char *context = NULL;
5359 if (!yychar || (yychar == ';' && !rsfp))
5361 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5362 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5363 while (isSPACE(*oldoldbufptr))
5365 context = oldoldbufptr;
5366 contlen = bufptr - oldoldbufptr;
5368 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5369 oldbufptr != bufptr) {
5370 while (isSPACE(*oldbufptr))
5372 context = oldbufptr;
5373 contlen = bufptr - oldbufptr;
5375 else if (yychar > 255)
5376 where = "next token ???";
5377 else if ((yychar & 127) == 127) {
5378 if (lex_state == LEX_NORMAL ||
5379 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5380 where = "at end of line";
5382 where = "within pattern";
5384 where = "within string";
5387 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5389 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5390 else if (isPRINT_LC(yychar))
5391 sv_catpvf(where_sv, "%c", yychar);
5393 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5394 where = SvPVX(where_sv);
5396 msg = sv_2mortal(newSVpv(s, 0));
5397 sv_catpvf(msg, " at %_ line %ld, ",
5398 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5400 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5402 sv_catpvf(msg, "%s\n", where);
5403 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5405 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5406 (int)multi_open,(int)multi_close,(long)multi_start);
5412 sv_catsv(ERRSV, msg);
5414 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5415 if (++error_count >= 10)
5416 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5418 in_my_stash = Nullhv;