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 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
781 : (lex_inwhat & OP_TRANS)
785 while (s < send || dorange) {
786 if (lex_inwhat == OP_TRANS) {
791 SvGROW(sv, SvLEN(sv) + 256);
795 for (i = (U8)*d; i <= max; i++)
800 else if (*s == '-' && s+1 < send && s != start) {
805 else if (*s == '(' && lex_inpat && s[1] == '?') {
807 while (s < send && *s != ')')
809 } else if (s[2] == '{') { /* This should march regcomp.c */
811 char *regparse = s + 3;
814 while (count && (c = *regparse)) {
815 if (c == '\\' && regparse[1])
823 if (*regparse == ')')
826 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
827 while (s < regparse && *s != ')')
831 else if (*s == '#' && lex_inpat &&
832 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
833 while (s+1 < send && *s != '\n')
836 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
838 else if (*s == '$') {
839 if (!lex_inpat) /* not a regexp, so $ must be var */
841 if (s + 1 < send && !strchr("()| \n\t", s[1]))
842 break; /* in regexp, $ might be tail anchor */
844 if (*s == '\\' && s+1 < send) {
846 if (*s && strchr(leaveit, *s)) {
851 if (lex_inwhat == OP_SUBST && !lex_inpat &&
852 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
855 warn("\\%c better written as $%c", *s, *s);
859 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
865 if (lex_inwhat == OP_TRANS) {
873 case '0': case '1': case '2': case '3':
874 case '4': case '5': case '6': case '7':
875 *d++ = scan_oct(s, 3, &len);
879 *d++ = scan_hex(++s, 2, &len);
915 SvCUR_set(sv, d - SvPVX(sv));
918 if (SvCUR(sv) + 5 < SvLEN(sv)) {
919 SvLEN_set(sv, SvCUR(sv) + 1);
920 Renew(SvPVX(sv), SvLEN(sv), char);
923 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
929 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
931 intuit_more(register char *s)
935 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
937 if (*s != '{' && *s != '[')
942 /* In a pattern, so maybe we have {n,m}. */
959 /* On the other hand, maybe we have a character class */
962 if (*s == ']' || *s == '^')
965 int weight = 2; /* let's weigh the evidence */
967 unsigned char un_char = 0, last_un_char;
968 char *send = strchr(s,']');
969 char tmpbuf[sizeof tokenbuf * 4];
971 if (!send) /* has to be an expression */
977 else if (isDIGIT(*s)) {
979 if (isDIGIT(s[1]) && s[2] == ']')
985 for (; s < send; s++) {
986 last_un_char = un_char;
987 un_char = (unsigned char)*s;
992 weight -= seen[un_char] * 10;
994 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
995 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1000 else if (*s == '$' && s[1] &&
1001 strchr("[#!%*<>()-=",s[1])) {
1002 if (/*{*/ strchr("])} =",s[2]))
1011 if (strchr("wds]",s[1]))
1013 else if (seen['\''] || seen['"'])
1015 else if (strchr("rnftbxcav",s[1]))
1017 else if (isDIGIT(s[1])) {
1019 while (s[1] && isDIGIT(s[1]))
1029 if (strchr("aA01! ",last_un_char))
1031 if (strchr("zZ79~",s[1]))
1035 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1036 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1041 if (keyword(tmpbuf, d - tmpbuf))
1044 if (un_char == last_un_char + 1)
1046 weight -= seen[un_char];
1051 if (weight >= 0) /* probably a character class */
1059 intuit_method(char *start, GV *gv)
1061 char *s = start + (*start == '$');
1062 char tmpbuf[sizeof tokenbuf];
1070 if ((cv = GvCVu(gv))) {
1071 char *proto = SvPVX(cv);
1081 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1082 if (*start == '$') {
1083 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1088 return *s == '(' ? FUNCMETH : METHOD;
1090 if (!keyword(tmpbuf, len)) {
1091 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1092 if (indirgv && GvCVu(indirgv))
1094 /* filehandle or package name makes it a method */
1095 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1097 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1098 return 0; /* no assumptions -- "=>" quotes bearword */
1099 nextval[nexttoke].opval =
1100 (OP*)newSVOP(OP_CONST, 0,
1102 nextval[nexttoke].opval->op_private =
1107 return *s == '(' ? FUNCMETH : METHOD;
1117 char *pdb = PerlEnv_getenv("PERL5DB");
1121 SETERRNO(0,SS$_NORMAL);
1122 return "BEGIN { require 'perl5db.pl' }";
1128 /* Encoded script support. filter_add() effectively inserts a
1129 * 'pre-processing' function into the current source input stream.
1130 * Note that the filter function only applies to the current source file
1131 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1133 * The datasv parameter (which may be NULL) can be used to pass
1134 * private data to this instance of the filter. The filter function
1135 * can recover the SV using the FILTER_DATA macro and use it to
1136 * store private buffers and state information.
1138 * The supplied datasv parameter is upgraded to a PVIO type
1139 * and the IoDIRP field is used to store the function pointer.
1140 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1141 * private use must be set using malloc'd pointers.
1143 static int filter_debug = 0;
1146 filter_add(filter_t funcp, SV *datasv)
1148 if (!funcp){ /* temporary handy debugging hack to be deleted */
1149 filter_debug = atoi((char*)datasv);
1153 rsfp_filters = newAV();
1155 datasv = NEWSV(255,0);
1156 if (!SvUPGRADE(datasv, SVt_PVIO))
1157 die("Can't upgrade filter_add data to SVt_PVIO");
1158 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1160 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1161 av_unshift(rsfp_filters, 1);
1162 av_store(rsfp_filters, 0, datasv) ;
1167 /* Delete most recently added instance of this filter function. */
1169 filter_del(filter_t funcp)
1172 warn("filter_del func %p", funcp);
1173 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1175 /* if filter is on top of stack (usual case) just pop it off */
1176 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1177 sv_free(av_pop(rsfp_filters));
1181 /* we need to search for the correct entry and clear it */
1182 die("filter_del can only delete in reverse order (currently)");
1186 /* Invoke the n'th filter function for the current rsfp. */
1188 filter_read(int idx, SV *buf_sv, int maxlen)
1191 /* 0 = read one text line */
1198 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1199 /* Provide a default input filter to make life easy. */
1200 /* Note that we append to the line. This is handy. */
1202 warn("filter_read %d: from rsfp\n", idx);
1206 int old_len = SvCUR(buf_sv) ;
1208 /* ensure buf_sv is large enough */
1209 SvGROW(buf_sv, old_len + maxlen) ;
1210 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1211 if (PerlIO_error(rsfp))
1212 return -1; /* error */
1214 return 0 ; /* end of file */
1216 SvCUR_set(buf_sv, old_len + len) ;
1219 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1220 if (PerlIO_error(rsfp))
1221 return -1; /* error */
1223 return 0 ; /* end of file */
1227 return SvCUR(buf_sv);
1229 /* Skip this filter slot if filter has been deleted */
1230 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1232 warn("filter_read %d: skipped (filter deleted)\n", idx);
1233 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1235 /* Get function pointer hidden within datasv */
1236 funcp = (filter_t)IoDIRP(datasv);
1238 warn("filter_read %d: via function %p (%s)\n",
1239 idx, funcp, SvPV(datasv,na));
1240 /* Call function. The function is expected to */
1241 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1242 /* Return: <0:error, =0:eof, >0:not eof */
1243 return (*funcp)(idx, buf_sv, maxlen);
1248 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1251 if (!rsfp_filters) {
1252 filter_add(win32_textfilter,NULL);
1258 SvCUR_set(sv, 0); /* start with empty line */
1259 if (FILTER_READ(0, sv, 0) > 0)
1260 return ( SvPVX(sv) ) ;
1265 return (sv_gets(sv, fp, append));
1270 static char* exp_name[] =
1271 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1274 EXT int yychar; /* last token */
1287 if (pending_ident) {
1288 char pit = pending_ident;
1292 if (strchr(tokenbuf,':'))
1293 croak(no_myglob,tokenbuf);
1294 yylval.opval = newOP(OP_PADANY, 0);
1295 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1299 if (!strchr(tokenbuf,':')) {
1301 /* Check for single character per-thread SVs */
1302 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1303 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1304 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1306 yylval.opval = newOP(OP_THREADSV, 0);
1307 yylval.opval->op_targ = tmp;
1310 #endif /* USE_THREADS */
1311 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1312 if (last_lop_op == OP_SORT &&
1313 tokenbuf[0] == '$' &&
1314 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1317 for (d = in_eval ? oldoldbufptr : linestart;
1318 d < bufend && *d != '\n';
1321 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1322 croak("Can't use \"my %s\" in sort comparison",
1328 yylval.opval = newOP(OP_PADANY, 0);
1329 yylval.opval->op_targ = tmp;
1334 /* Force them to make up their mind on "@foo". */
1335 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1336 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1337 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1338 yyerror(form("In string, %s now must be written as \\%s",
1339 tokenbuf, tokenbuf));
1342 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1343 yylval.opval->op_private = OPpCONST_ENTERED;
1344 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1345 ((tokenbuf[0] == '$') ? SVt_PV
1346 : (tokenbuf[0] == '@') ? SVt_PVAV
1351 switch (lex_state) {
1353 case LEX_NORMAL: /* Some compilers will produce faster */
1354 case LEX_INTERPNORMAL: /* code if we comment these out. */
1360 yylval = nextval[nexttoke];
1362 lex_state = lex_defer;
1363 expect = lex_expect;
1364 lex_defer = LEX_NORMAL;
1366 return(nexttype[nexttoke]);
1368 case LEX_INTERPCASEMOD:
1370 if (bufptr != bufend && *bufptr != '\\')
1371 croak("panic: INTERPCASEMOD");
1373 if (bufptr == bufend || bufptr[1] == 'E') {
1376 oldmod = lex_casestack[--lex_casemods];
1377 lex_casestack[lex_casemods] = '\0';
1378 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1380 lex_state = LEX_INTERPCONCAT;
1384 if (bufptr != bufend)
1386 lex_state = LEX_INTERPCONCAT;
1391 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1392 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1393 if (strchr("LU", *s) &&
1394 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1396 lex_casestack[--lex_casemods] = '\0';
1399 if (lex_casemods > 10) {
1400 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1401 if (newlb != lex_casestack) {
1403 lex_casestack = newlb;
1406 lex_casestack[lex_casemods++] = *s;
1407 lex_casestack[lex_casemods] = '\0';
1408 lex_state = LEX_INTERPCONCAT;
1409 nextval[nexttoke].ival = 0;
1412 nextval[nexttoke].ival = OP_LCFIRST;
1414 nextval[nexttoke].ival = OP_UCFIRST;
1416 nextval[nexttoke].ival = OP_LC;
1418 nextval[nexttoke].ival = OP_UC;
1420 nextval[nexttoke].ival = OP_QUOTEMETA;
1422 croak("panic: yylex");
1434 case LEX_INTERPPUSH:
1435 return sublex_push();
1437 case LEX_INTERPSTART:
1438 if (bufptr == bufend)
1439 return sublex_done();
1441 lex_dojoin = (*bufptr == '@');
1442 lex_state = LEX_INTERPNORMAL;
1444 nextval[nexttoke].ival = 0;
1447 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1448 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1449 force_next(PRIVATEREF);
1451 force_ident("\"", '$');
1452 #endif /* USE_THREADS */
1453 nextval[nexttoke].ival = 0;
1455 nextval[nexttoke].ival = 0;
1457 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1466 case LEX_INTERPENDMAYBE:
1467 if (intuit_more(bufptr)) {
1468 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1476 lex_state = LEX_INTERPCONCAT;
1480 case LEX_INTERPCONCAT:
1483 croak("panic: INTERPCONCAT");
1485 if (bufptr == bufend)
1486 return sublex_done();
1488 if (SvIVX(linestr) == '\'') {
1489 SV *sv = newSVsv(linestr);
1492 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1496 s = scan_const(bufptr);
1498 lex_state = LEX_INTERPCASEMOD;
1500 lex_state = LEX_INTERPSTART;
1504 nextval[nexttoke] = yylval;
1517 lex_state = LEX_NORMAL;
1518 s = scan_formline(bufptr);
1525 oldoldbufptr = oldbufptr;
1528 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1534 croak("Unrecognized character \\%03o", *s & 255);
1537 goto fake_eof; /* emulate EOF on ^D or ^Z */
1543 yyerror("Missing right bracket");
1547 goto retry; /* ignore stray nulls */
1550 if (!in_eval && !preambled) {
1552 sv_setpv(linestr,incl_perldb());
1554 sv_catpv(linestr,";");
1556 while(AvFILLp(preambleav) >= 0) {
1557 SV *tmpsv = av_shift(preambleav);
1558 sv_catsv(linestr, tmpsv);
1559 sv_catpv(linestr, ";");
1562 sv_free((SV*)preambleav);
1565 if (minus_n || minus_p) {
1566 sv_catpv(linestr, "LINE: while (<>) {");
1568 sv_catpv(linestr,"chomp;");
1570 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1572 GvIMPORTED_AV_on(gv);
1574 if (strchr("/'\"", *splitstr)
1575 && strchr(splitstr + 1, *splitstr))
1576 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1579 s = "'~#\200\1'"; /* surely one char is unused...*/
1580 while (s[1] && strchr(splitstr, *s)) s++;
1582 sv_catpvf(linestr, "@F=split(%s%c",
1583 "q" + (delim == '\''), delim);
1584 for (s = splitstr; *s; s++) {
1586 sv_catpvn(linestr, "\\", 1);
1587 sv_catpvn(linestr, s, 1);
1589 sv_catpvf(linestr, "%c);", delim);
1593 sv_catpv(linestr,"@F=split(' ');");
1596 sv_catpv(linestr, "\n");
1597 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1598 bufend = SvPVX(linestr) + SvCUR(linestr);
1599 if (PERLDB_LINE && curstash != debstash) {
1600 SV *sv = NEWSV(85,0);
1602 sv_upgrade(sv, SVt_PVMG);
1603 sv_setsv(sv,linestr);
1604 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1609 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1612 if (preprocess && !in_eval)
1613 (void)PerlProc_pclose(rsfp);
1614 else if ((PerlIO *)rsfp == PerlIO_stdin())
1615 PerlIO_clearerr(rsfp);
1617 (void)PerlIO_close(rsfp);
1622 if (!in_eval && (minus_n || minus_p)) {
1623 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1624 sv_catpv(linestr,";}");
1625 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1626 bufend = SvPVX(linestr) + SvCUR(linestr);
1627 minus_n = minus_p = 0;
1630 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1631 sv_setpv(linestr,"");
1632 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1635 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1638 /* Incest with pod. */
1639 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1640 sv_setpv(linestr, "");
1641 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1642 bufend = SvPVX(linestr) + SvCUR(linestr);
1647 } while (doextract);
1648 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1649 if (PERLDB_LINE && curstash != debstash) {
1650 SV *sv = NEWSV(85,0);
1652 sv_upgrade(sv, SVt_PVMG);
1653 sv_setsv(sv,linestr);
1654 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1656 bufend = SvPVX(linestr) + SvCUR(linestr);
1657 if (curcop->cop_line == 1) {
1658 while (s < bufend && isSPACE(*s))
1660 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1664 if (*s == '#' && *(s+1) == '!')
1666 #ifdef ALTERNATE_SHEBANG
1668 static char as[] = ALTERNATE_SHEBANG;
1669 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1670 d = s + (sizeof(as) - 1);
1672 #endif /* ALTERNATE_SHEBANG */
1681 while (*d && !isSPACE(*d))
1685 #ifdef ARG_ZERO_IS_SCRIPT
1686 if (ipathend > ipath) {
1688 * HP-UX (at least) sets argv[0] to the script name,
1689 * which makes $^X incorrect. And Digital UNIX and Linux,
1690 * at least, set argv[0] to the basename of the Perl
1691 * interpreter. So, having found "#!", we'll set it right.
1693 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1694 assert(SvPOK(x) || SvGMAGICAL(x));
1695 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1696 sv_setpvn(x, ipath, ipathend - ipath);
1699 TAINT_NOT; /* $^X is always tainted, but that's OK */
1701 #endif /* ARG_ZERO_IS_SCRIPT */
1706 d = instr(s,"perl -");
1708 d = instr(s,"perl");
1709 #ifdef ALTERNATE_SHEBANG
1711 * If the ALTERNATE_SHEBANG on this system starts with a
1712 * character that can be part of a Perl expression, then if
1713 * we see it but not "perl", we're probably looking at the
1714 * start of Perl code, not a request to hand off to some
1715 * other interpreter. Similarly, if "perl" is there, but
1716 * not in the first 'word' of the line, we assume the line
1717 * contains the start of the Perl program.
1719 if (d && *s != '#') {
1721 while (*c && !strchr("; \t\r\n\f\v#", *c))
1724 d = Nullch; /* "perl" not in first word; ignore */
1726 *s = '#'; /* Don't try to parse shebang line */
1728 #endif /* ALTERNATE_SHEBANG */
1733 !instr(s,"indir") &&
1734 instr(origargv[0],"perl"))
1740 while (s < bufend && isSPACE(*s))
1743 Newz(899,newargv,origargc+3,char*);
1745 while (s < bufend && !isSPACE(*s))
1748 Copy(origargv+1, newargv+2, origargc+1, char*);
1753 execv(ipath, newargv);
1754 croak("Can't exec %s", ipath);
1757 U32 oldpdb = perldb;
1758 bool oldn = minus_n;
1759 bool oldp = minus_p;
1761 while (*d && !isSPACE(*d)) d++;
1762 while (*d == ' ' || *d == '\t') d++;
1766 if (*d == 'M' || *d == 'm') {
1768 while (*d && !isSPACE(*d)) d++;
1769 croak("Too late for \"-%.*s\" option",
1772 d = moreswitches(d);
1774 if (PERLDB_LINE && !oldpdb ||
1775 ( minus_n || minus_p ) && !(oldn || oldp) )
1776 /* if we have already added "LINE: while (<>) {",
1777 we must not do it again */
1779 sv_setpv(linestr, "");
1780 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1781 bufend = SvPVX(linestr) + SvCUR(linestr);
1784 (void)gv_fetchfile(origfilename);
1791 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1793 lex_state = LEX_FORMLINE;
1799 warn("Illegal character \\%03o (carriage return)", '\r');
1801 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1803 case ' ': case '\t': case '\f': case 013:
1808 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1810 while (s < d && *s != '\n')
1815 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1817 lex_state = LEX_FORMLINE;
1827 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1832 while (s < bufend && (*s == ' ' || *s == '\t'))
1835 if (strnEQ(s,"=>",2)) {
1837 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1838 (int)tmp, (int)tmp);
1839 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1840 OPERATOR('-'); /* unary minus */
1842 last_uni = oldbufptr;
1843 last_lop_op = OP_FTEREAD; /* good enough */
1845 case 'r': FTST(OP_FTEREAD);
1846 case 'w': FTST(OP_FTEWRITE);
1847 case 'x': FTST(OP_FTEEXEC);
1848 case 'o': FTST(OP_FTEOWNED);
1849 case 'R': FTST(OP_FTRREAD);
1850 case 'W': FTST(OP_FTRWRITE);
1851 case 'X': FTST(OP_FTREXEC);
1852 case 'O': FTST(OP_FTROWNED);
1853 case 'e': FTST(OP_FTIS);
1854 case 'z': FTST(OP_FTZERO);
1855 case 's': FTST(OP_FTSIZE);
1856 case 'f': FTST(OP_FTFILE);
1857 case 'd': FTST(OP_FTDIR);
1858 case 'l': FTST(OP_FTLINK);
1859 case 'p': FTST(OP_FTPIPE);
1860 case 'S': FTST(OP_FTSOCK);
1861 case 'u': FTST(OP_FTSUID);
1862 case 'g': FTST(OP_FTSGID);
1863 case 'k': FTST(OP_FTSVTX);
1864 case 'b': FTST(OP_FTBLK);
1865 case 'c': FTST(OP_FTCHR);
1866 case 't': FTST(OP_FTTTY);
1867 case 'T': FTST(OP_FTTEXT);
1868 case 'B': FTST(OP_FTBINARY);
1869 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1870 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1871 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1873 croak("Unrecognized file test: -%c", (int)tmp);
1880 if (expect == XOPERATOR)
1885 else if (*s == '>') {
1888 if (isIDFIRST(*s)) {
1889 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1897 if (expect == XOPERATOR)
1900 if (isSPACE(*s) || !isSPACE(*bufptr))
1902 OPERATOR('-'); /* unary minus */
1909 if (expect == XOPERATOR)
1914 if (expect == XOPERATOR)
1917 if (isSPACE(*s) || !isSPACE(*bufptr))
1923 if (expect != XOPERATOR) {
1924 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1926 force_ident(tokenbuf, '*');
1939 if (expect == XOPERATOR) {
1944 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1947 yyerror("Final % should be \\% or %name");
1950 pending_ident = '%';
1972 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1973 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1978 if (curcop->cop_line < copline)
1979 copline = curcop->cop_line;
1990 if (lex_brackets <= 0)
1991 yyerror("Unmatched right bracket");
1994 if (lex_state == LEX_INTERPNORMAL) {
1995 if (lex_brackets == 0) {
1996 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1997 lex_state = LEX_INTERPEND;
2004 if (lex_brackets > 100) {
2005 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
2006 if (newlb != lex_brackstack) {
2008 lex_brackstack = newlb;
2013 if (lex_formbrack) {
2017 if (oldoldbufptr == last_lop)
2018 lex_brackstack[lex_brackets++] = XTERM;
2020 lex_brackstack[lex_brackets++] = XOPERATOR;
2021 OPERATOR(HASHBRACK);
2023 while (s < bufend && (*s == ' ' || *s == '\t'))
2027 if (d < bufend && *d == '-') {
2030 while (d < bufend && (*d == ' ' || *d == '\t'))
2033 if (d < bufend && isIDFIRST(*d)) {
2034 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
2036 while (d < bufend && (*d == ' ' || *d == '\t'))
2039 char minus = (tokenbuf[0] == '-');
2041 (keyword(tokenbuf + 1, len) ||
2042 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
2043 perl_get_cv(tokenbuf + 1, FALSE) ))
2044 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
2045 tokenbuf + !minus, tokenbuf + !minus);
2046 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2053 lex_brackstack[lex_brackets++] = XSTATE;
2057 lex_brackstack[lex_brackets++] = XOPERATOR;
2062 if (oldoldbufptr == last_lop)
2063 lex_brackstack[lex_brackets++] = XTERM;
2065 lex_brackstack[lex_brackets++] = XOPERATOR;
2068 if (expect == XSTATE) {
2069 lex_brackstack[lex_brackets-1] = XSTATE;
2072 OPERATOR(HASHBRACK);
2074 /* This hack serves to disambiguate a pair of curlies
2075 * as being a block or an anon hash. Normally, expectation
2076 * determines that, but in cases where we're not in a
2077 * position to expect anything in particular (like inside
2078 * eval"") we have to resolve the ambiguity. This code
2079 * covers the case where the first term in the curlies is a
2080 * quoted string. Most other cases need to be explicitly
2081 * disambiguated by prepending a `+' before the opening
2082 * curly in order to force resolution as an anon hash.
2084 * XXX should probably propagate the outer expectation
2085 * into eval"" to rely less on this hack, but that could
2086 * potentially break current behavior of eval"".
2090 if (*s == '\'' || *s == '"' || *s == '`') {
2091 /* common case: get past first string, handling escapes */
2092 for (t++; t < bufend && *t != *s;)
2093 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2097 else if (*s == 'q') {
2100 || ((*t == 'q' || *t == 'x') && ++t < bufend
2101 && !isALNUM(*t)))) {
2103 char open, close, term;
2106 while (t < bufend && isSPACE(*t))
2110 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2114 for (t++; t < bufend; t++) {
2115 if (*t == '\\' && t+1 < bufend && open != '\\')
2117 else if (*t == open)
2121 for (t++; t < bufend; t++) {
2122 if (*t == '\\' && t+1 < bufend)
2124 else if (*t == close && --brackets <= 0)
2126 else if (*t == open)
2132 else if (isALPHA(*s)) {
2133 for (t++; t < bufend && isALNUM(*t); t++) ;
2135 while (t < bufend && isSPACE(*t))
2137 /* if comma follows first term, call it an anon hash */
2138 /* XXX it could be a comma expression with loop modifiers */
2139 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2140 || (*t == '=' && t[1] == '>')))
2141 OPERATOR(HASHBRACK);
2145 lex_brackstack[lex_brackets-1] = XSTATE;
2151 yylval.ival = curcop->cop_line;
2152 if (isSPACE(*s) || *s == '#')
2153 copline = NOLINE; /* invalidate current command line number */
2158 if (lex_brackets <= 0)
2159 yyerror("Unmatched right bracket");
2161 expect = (expectation)lex_brackstack[--lex_brackets];
2162 if (lex_brackets < lex_formbrack)
2164 if (lex_state == LEX_INTERPNORMAL) {
2165 if (lex_brackets == 0) {
2166 if (lex_fakebrack) {
2167 lex_state = LEX_INTERPEND;
2169 return yylex(); /* ignore fake brackets */
2171 if (*s == '-' && s[1] == '>')
2172 lex_state = LEX_INTERPENDMAYBE;
2173 else if (*s != '[' && *s != '{')
2174 lex_state = LEX_INTERPEND;
2177 if (lex_brackets < lex_fakebrack) {
2180 return yylex(); /* ignore fake brackets */
2190 if (expect == XOPERATOR) {
2191 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2199 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2202 force_ident(tokenbuf, '&');
2206 yylval.ival = (OPpENTERSUB_AMPER<<8);
2225 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2226 warn("Reversed %c= operator",(int)tmp);
2228 if (expect == XSTATE && isALPHA(tmp) &&
2229 (s == linestart+1 || s[-2] == '\n') )
2231 if (in_eval && !rsfp) {
2236 if (strnEQ(s,"=cut",4)) {
2253 if (lex_brackets < lex_formbrack) {
2255 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2256 if (*t == '\n' || *t == '#') {
2274 if (expect != XOPERATOR) {
2275 if (s[1] != '<' && !strchr(s,'>'))
2278 s = scan_heredoc(s);
2280 s = scan_inputsymbol(s);
2281 TERM(sublex_start());
2286 SHop(OP_LEFT_SHIFT);
2300 SHop(OP_RIGHT_SHIFT);
2309 if (expect == XOPERATOR) {
2310 if (lex_formbrack && lex_brackets == lex_formbrack) {
2313 return ','; /* grandfather non-comma-format format */
2317 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2318 if (expect == XOPERATOR)
2319 no_op("Array length", bufptr);
2321 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2326 pending_ident = '#';
2330 if (expect == XOPERATOR)
2331 no_op("Scalar", bufptr);
2333 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2336 yyerror("Final $ should be \\$ or $name");
2340 /* This kludge not intended to be bulletproof. */
2341 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2342 yylval.opval = newSVOP(OP_CONST, 0,
2343 newSViv((IV)compiling.cop_arybase));
2344 yylval.opval->op_private = OPpCONST_ARYBASE;
2349 if (lex_state == LEX_NORMAL)
2352 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2358 isSPACE(*t) || isALNUM(*t) || *t == '$';
2361 bufptr = skipspace(bufptr);
2362 while (t < bufend && *t != ']')
2364 warn("Multidimensional syntax %.*s not supported",
2365 (t - bufptr) + 1, bufptr);
2369 else if (*s == '{') {
2371 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2372 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2374 char tmpbuf[sizeof tokenbuf];
2376 for (t++; isSPACE(*t); t++) ;
2377 if (isIDFIRST(*t)) {
2378 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2379 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2380 warn("You need to quote \"%s\"", tmpbuf);
2387 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2388 bool islop = (last_lop == oldoldbufptr);
2389 if (!islop || last_lop_op == OP_GREPSTART)
2391 else if (strchr("$@\"'`q", *s))
2392 expect = XTERM; /* e.g. print $fh "foo" */
2393 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2394 expect = XTERM; /* e.g. print $fh &sub */
2395 else if (isIDFIRST(*s)) {
2396 char tmpbuf[sizeof tokenbuf];
2397 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2398 if (tmp = keyword(tmpbuf, len)) {
2399 /* binary operators exclude handle interpretations */
2411 expect = XTERM; /* e.g. print $fh length() */
2416 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2417 if (gv && GvCVu(gv))
2418 expect = XTERM; /* e.g. print $fh subr() */
2421 else if (isDIGIT(*s))
2422 expect = XTERM; /* e.g. print $fh 3 */
2423 else if (*s == '.' && isDIGIT(s[1]))
2424 expect = XTERM; /* e.g. print $fh .3 */
2425 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2426 expect = XTERM; /* e.g. print $fh -1 */
2427 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2428 expect = XTERM; /* print $fh <<"EOF" */
2430 pending_ident = '$';
2434 if (expect == XOPERATOR)
2437 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2440 yyerror("Final @ should be \\@ or @name");
2443 if (lex_state == LEX_NORMAL)
2445 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2449 /* Warn about @ where they meant $. */
2451 if (*s == '[' || *s == '{') {
2453 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2455 if (*t == '}' || *t == ']') {
2457 bufptr = skipspace(bufptr);
2458 warn("Scalar value %.*s better written as $%.*s",
2459 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2464 pending_ident = '@';
2467 case '/': /* may either be division or pattern */
2468 case '?': /* may either be conditional or pattern */
2469 if (expect != XOPERATOR) {
2470 /* Disable warning on "study /blah/" */
2471 if (oldoldbufptr == last_uni
2472 && (*last_uni != 's' || s - last_uni < 5
2473 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2476 TERM(sublex_start());
2484 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2485 (s == linestart || s[-1] == '\n') ) {
2490 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2496 yylval.ival = OPf_SPECIAL;
2502 if (expect != XOPERATOR)
2507 case '0': case '1': case '2': case '3': case '4':
2508 case '5': case '6': case '7': case '8': case '9':
2510 if (expect == XOPERATOR)
2516 if (expect == XOPERATOR) {
2517 if (lex_formbrack && lex_brackets == lex_formbrack) {
2520 return ','; /* grandfather non-comma-format format */
2526 missingterm((char*)0);
2527 yylval.ival = OP_CONST;
2528 TERM(sublex_start());
2532 if (expect == XOPERATOR) {
2533 if (lex_formbrack && lex_brackets == lex_formbrack) {
2536 return ','; /* grandfather non-comma-format format */
2542 missingterm((char*)0);
2543 yylval.ival = OP_CONST;
2544 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2545 if (*d == '$' || *d == '@' || *d == '\\') {
2546 yylval.ival = OP_STRINGIFY;
2550 TERM(sublex_start());
2554 if (expect == XOPERATOR)
2555 no_op("Backticks",s);
2557 missingterm((char*)0);
2558 yylval.ival = OP_BACKTICK;
2560 TERM(sublex_start());
2564 if (dowarn && lex_inwhat && isDIGIT(*s))
2565 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2566 if (expect == XOPERATOR)
2567 no_op("Backslash",s);
2571 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2610 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2612 /* Some keywords can be followed by any delimiter, including ':' */
2613 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2614 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2615 (tokenbuf[0] == 'q' &&
2616 strchr("qwx", tokenbuf[1]))));
2618 /* x::* is just a word, unless x is "CORE" */
2619 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2623 while (d < bufend && isSPACE(*d))
2624 d++; /* no comments skipped here, or s### is misparsed */
2626 /* Is this a label? */
2627 if (!tmp && expect == XSTATE
2628 && d < bufend && *d == ':' && *(d + 1) != ':') {
2630 yylval.pval = savepv(tokenbuf);
2635 /* Check for keywords */
2636 tmp = keyword(tokenbuf, len);
2638 /* Is this a word before a => operator? */
2639 if (strnEQ(d,"=>",2)) {
2641 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2642 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2643 tokenbuf, tokenbuf);
2644 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2645 yylval.opval->op_private = OPpCONST_BARE;
2649 if (tmp < 0) { /* second-class keyword? */
2650 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2651 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2652 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2653 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2654 (gv = *gvp) != (GV*)&sv_undef &&
2655 GvCVu(gv) && GvIMPORTED_CV(gv))))
2657 tmp = 0; /* overridden by importation */
2660 && -tmp==KEY_lock /* XXX generalizable kludge */
2661 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2663 tmp = 0; /* any sub overrides "weak" keyword */
2666 tmp = -tmp; gv = Nullgv; gvp = 0;
2673 default: /* not a keyword */
2676 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2678 /* Get the rest if it looks like a package qualifier */
2680 if (*s == '\'' || *s == ':' && s[1] == ':') {
2681 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2684 croak("Bad name after %s::", tokenbuf);
2687 if (expect == XOPERATOR) {
2688 if (bufptr == linestart) {
2694 no_op("Bareword",s);
2697 /* Look for a subroutine with this name in current package. */
2700 sv = newSVpv("CORE::GLOBAL::",14);
2701 sv_catpv(sv,tokenbuf);
2704 sv = newSVpv(tokenbuf,0);
2706 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2708 /* Presume this is going to be a bareword of some sort. */
2711 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2712 yylval.opval->op_private = OPpCONST_BARE;
2714 /* See if it's the indirect object for a list operator. */
2717 oldoldbufptr < bufptr &&
2718 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2719 /* NO SKIPSPACE BEFORE HERE! */
2721 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2723 bool immediate_paren = *s == '(';
2725 /* (Now we can afford to cross potential line boundary.) */
2728 /* Two barewords in a row may indicate method call. */
2730 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2733 /* If not a declared subroutine, it's an indirect object. */
2734 /* (But it's an indir obj regardless for sort.) */
2736 if ((last_lop_op == OP_SORT ||
2737 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2738 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2739 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2744 /* If followed by a paren, it's certainly a subroutine. */
2750 if (gv && GvCVu(gv)) {
2751 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2752 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2757 nextval[nexttoke].opval = yylval.opval;
2764 /* If followed by var or block, call it a method (unless sub) */
2766 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2767 last_lop = oldbufptr;
2768 last_lop_op = OP_METHOD;
2772 /* If followed by a bareword, see if it looks like indir obj. */
2774 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2777 /* Not a method, so call it a subroutine (if defined) */
2779 if (gv && GvCVu(gv)) {
2781 if (lastchar == '-')
2782 warn("Ambiguous use of -%s resolved as -&%s()",
2783 tokenbuf, tokenbuf);
2784 last_lop = oldbufptr;
2785 last_lop_op = OP_ENTERSUB;
2786 /* Check for a constant sub */
2788 if ((sv = cv_const_sv(cv))) {
2790 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2791 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2792 yylval.opval->op_private = 0;
2796 /* Resolve to GV now. */
2797 op_free(yylval.opval);
2798 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2799 /* Is there a prototype? */
2802 char *proto = SvPV((SV*)cv, len);
2805 if (strEQ(proto, "$"))
2807 if (*proto == '&' && *s == '{') {
2808 sv_setpv(subname,"__ANON__");
2812 nextval[nexttoke].opval = yylval.opval;
2818 if (hints & HINT_STRICT_SUBS &&
2821 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2822 last_lop_op != OP_ACCEPT &&
2823 last_lop_op != OP_PIPE_OP &&
2824 last_lop_op != OP_SOCKPAIR)
2827 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2832 /* Call it a bare word */
2836 if (lastchar != '-') {
2837 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2839 warn(warn_reserved, tokenbuf);
2842 if (lastchar && strchr("*%&", lastchar)) {
2843 warn("Operator or semicolon missing before %c%s",
2844 lastchar, tokenbuf);
2845 warn("Ambiguous use of %c resolved as operator %c",
2846 lastchar, lastchar);
2852 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2853 newSVsv(GvSV(curcop->cop_filegv)));
2857 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2858 newSVpvf("%ld", (long)curcop->cop_line));
2861 case KEY___PACKAGE__:
2862 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2864 ? newSVsv(curstname)
2873 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2874 char *pname = "main";
2875 if (tokenbuf[2] == 'D')
2876 pname = HvNAME(curstash ? curstash : defstash);
2877 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2880 GvIOp(gv) = newIO();
2881 IoIFP(GvIOp(gv)) = rsfp;
2882 #if defined(HAS_FCNTL) && defined(F_SETFD)
2884 int fd = PerlIO_fileno(rsfp);
2885 fcntl(fd,F_SETFD,fd >= 3);
2888 /* Mark this internal pseudo-handle as clean */
2889 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2891 IoTYPE(GvIOp(gv)) = '|';
2892 else if ((PerlIO*)rsfp == PerlIO_stdin())
2893 IoTYPE(GvIOp(gv)) = '-';
2895 IoTYPE(GvIOp(gv)) = '<';
2906 if (expect == XSTATE) {
2913 if (*s == ':' && s[1] == ':') {
2916 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2917 tmp = keyword(tokenbuf, len);
2931 LOP(OP_ACCEPT,XTERM);
2937 LOP(OP_ATAN2,XTERM);
2946 LOP(OP_BLESS,XTERM);
2955 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2975 LOP(OP_CRYPT,XTERM);
2979 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2980 if (*d != '0' && isDIGIT(*d))
2981 yywarn("chmod: mode argument is missing initial 0");
2983 LOP(OP_CHMOD,XTERM);
2986 LOP(OP_CHOWN,XTERM);
2989 LOP(OP_CONNECT,XTERM);
3005 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3009 hints |= HINT_BLOCK_SCOPE;
3019 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
3020 LOP(OP_DBMOPEN,XTERM);
3026 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3033 yylval.ival = curcop->cop_line;
3047 expect = (*s == '{') ? XTERMBLOCK : XTERM;
3048 UNIBRACK(OP_ENTEREVAL);
3063 case KEY_endhostent:
3069 case KEY_endservent:
3072 case KEY_endprotoent:
3083 yylval.ival = curcop->cop_line;
3085 if (isIDFIRST(*s)) {
3087 if ((bufend - p) >= 3 &&
3088 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3092 croak("Missing $ on loop variable");
3097 LOP(OP_FORMLINE,XTERM);
3103 LOP(OP_FCNTL,XTERM);
3109 LOP(OP_FLOCK,XTERM);
3118 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3121 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3136 case KEY_getpriority:
3137 LOP(OP_GETPRIORITY,XTERM);
3139 case KEY_getprotobyname:
3142 case KEY_getprotobynumber:
3143 LOP(OP_GPBYNUMBER,XTERM);
3145 case KEY_getprotoent:
3157 case KEY_getpeername:
3158 UNI(OP_GETPEERNAME);
3160 case KEY_gethostbyname:
3163 case KEY_gethostbyaddr:
3164 LOP(OP_GHBYADDR,XTERM);
3166 case KEY_gethostent:
3169 case KEY_getnetbyname:
3172 case KEY_getnetbyaddr:
3173 LOP(OP_GNBYADDR,XTERM);
3178 case KEY_getservbyname:
3179 LOP(OP_GSBYNAME,XTERM);
3181 case KEY_getservbyport:
3182 LOP(OP_GSBYPORT,XTERM);
3184 case KEY_getservent:
3187 case KEY_getsockname:
3188 UNI(OP_GETSOCKNAME);
3190 case KEY_getsockopt:
3191 LOP(OP_GSOCKOPT,XTERM);
3213 yylval.ival = curcop->cop_line;
3217 LOP(OP_INDEX,XTERM);
3223 LOP(OP_IOCTL,XTERM);
3235 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3266 LOP(OP_LISTEN,XTERM);
3276 TERM(sublex_start());
3279 LOP(OP_MAPSTART,XREF);
3282 LOP(OP_MKDIR,XTERM);
3285 LOP(OP_MSGCTL,XTERM);
3288 LOP(OP_MSGGET,XTERM);
3291 LOP(OP_MSGRCV,XTERM);
3294 LOP(OP_MSGSND,XTERM);
3299 if (isIDFIRST(*s)) {
3300 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3301 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3305 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3312 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3319 if (expect != XSTATE)
3320 yyerror("\"no\" not allowed in expression");
3321 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3322 s = force_version(s);
3331 if (isIDFIRST(*s)) {
3333 for (d = s; isALNUM(*d); d++) ;
3335 if (strchr("|&*+-=!?:.", *t))
3336 warn("Precedence problem: open %.*s should be open(%.*s)",
3342 yylval.ival = OP_OR;
3352 LOP(OP_OPEN_DIR,XTERM);
3355 checkcomma(s,tokenbuf,"filehandle");
3359 checkcomma(s,tokenbuf,"filehandle");
3378 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3382 LOP(OP_PIPE_OP,XTERM);
3387 missingterm((char*)0);
3388 yylval.ival = OP_CONST;
3389 TERM(sublex_start());
3397 missingterm((char*)0);
3398 if (dowarn && SvLEN(lex_stuff)) {
3399 d = SvPV_force(lex_stuff, len);
3400 for (; len; --len, ++d) {
3402 warn("Possible attempt to separate words with commas");
3406 warn("Possible attempt to put comments in qw() list");
3412 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, q(lex_stuff));
3416 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3419 yylval.ival = OP_SPLIT;
3423 last_lop = oldbufptr;
3424 last_lop_op = OP_SPLIT;
3430 missingterm((char*)0);
3431 yylval.ival = OP_STRINGIFY;
3432 if (SvIVX(lex_stuff) == '\'')
3433 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3434 TERM(sublex_start());
3439 missingterm((char*)0);
3440 yylval.ival = OP_BACKTICK;
3442 TERM(sublex_start());
3449 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3450 if (isIDFIRST(*tokenbuf))
3451 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3453 yyerror("<> should be quotes");
3460 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3464 LOP(OP_RENAME,XTERM);
3473 LOP(OP_RINDEX,XTERM);
3496 LOP(OP_REVERSE,XTERM);
3507 TERM(sublex_start());
3509 TOKEN(1); /* force error */
3518 LOP(OP_SELECT,XTERM);
3524 LOP(OP_SEMCTL,XTERM);
3527 LOP(OP_SEMGET,XTERM);
3530 LOP(OP_SEMOP,XTERM);
3536 LOP(OP_SETPGRP,XTERM);
3538 case KEY_setpriority:
3539 LOP(OP_SETPRIORITY,XTERM);
3541 case KEY_sethostent:
3547 case KEY_setservent:
3550 case KEY_setprotoent:
3560 LOP(OP_SEEKDIR,XTERM);
3562 case KEY_setsockopt:
3563 LOP(OP_SSOCKOPT,XTERM);
3569 LOP(OP_SHMCTL,XTERM);
3572 LOP(OP_SHMGET,XTERM);
3575 LOP(OP_SHMREAD,XTERM);
3578 LOP(OP_SHMWRITE,XTERM);
3581 LOP(OP_SHUTDOWN,XTERM);
3590 LOP(OP_SOCKET,XTERM);
3592 case KEY_socketpair:
3593 LOP(OP_SOCKPAIR,XTERM);
3596 checkcomma(s,tokenbuf,"subroutine name");
3598 if (*s == ';' || *s == ')') /* probably a close */
3599 croak("sort is now a reserved word");
3601 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3605 LOP(OP_SPLIT,XTERM);
3608 LOP(OP_SPRINTF,XTERM);
3611 LOP(OP_SPLICE,XTERM);
3627 LOP(OP_SUBSTR,XTERM);
3634 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3635 char tmpbuf[sizeof tokenbuf];
3637 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3638 if (strchr(tmpbuf, ':'))
3639 sv_setpv(subname, tmpbuf);
3641 sv_setsv(subname,curstname);
3642 sv_catpvn(subname,"::",2);
3643 sv_catpvn(subname,tmpbuf,len);
3645 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3649 expect = XTERMBLOCK;
3650 sv_setpv(subname,"?");
3653 if (tmp == KEY_format) {
3656 lex_formbrack = lex_brackets + 1;
3660 /* Look for a prototype */
3667 SvREFCNT_dec(lex_stuff);
3669 croak("Prototype not terminated");
3672 d = SvPVX(lex_stuff);
3674 for (p = d; *p; ++p) {
3679 SvCUR(lex_stuff) = tmp;
3682 nextval[1] = nextval[0];
3683 nexttype[1] = nexttype[0];
3684 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3685 nexttype[0] = THING;
3686 if (nexttoke == 1) {
3687 lex_defer = lex_state;
3688 lex_expect = expect;
3689 lex_state = LEX_KNOWNEXT;
3694 if (*SvPV(subname,na) == '?') {
3695 sv_setpv(subname,"__ANON__");
3702 LOP(OP_SYSTEM,XREF);
3705 LOP(OP_SYMLINK,XTERM);
3708 LOP(OP_SYSCALL,XTERM);
3711 LOP(OP_SYSOPEN,XTERM);
3714 LOP(OP_SYSSEEK,XTERM);
3717 LOP(OP_SYSREAD,XTERM);
3720 LOP(OP_SYSWRITE,XTERM);
3724 TERM(sublex_start());
3745 LOP(OP_TRUNCATE,XTERM);
3757 yylval.ival = curcop->cop_line;
3761 yylval.ival = curcop->cop_line;
3765 LOP(OP_UNLINK,XTERM);
3771 LOP(OP_UNPACK,XTERM);
3774 LOP(OP_UTIME,XTERM);
3778 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3779 if (*d != '0' && isDIGIT(*d))
3780 yywarn("umask: argument is missing initial 0");
3785 LOP(OP_UNSHIFT,XTERM);
3788 if (expect != XSTATE)
3789 yyerror("\"use\" not allowed in expression");
3792 s = force_version(s);
3793 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3794 nextval[nexttoke].opval = Nullop;
3799 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3800 s = force_version(s);
3813 yylval.ival = curcop->cop_line;
3817 hints |= HINT_BLOCK_SCOPE;
3824 LOP(OP_WAITPID,XTERM);
3830 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3834 if (expect == XOPERATOR)
3840 yylval.ival = OP_XOR;
3845 TERM(sublex_start());
3851 keyword(register char *d, I32 len)
3856 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3857 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3858 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3859 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3860 if (strEQ(d,"__END__")) return KEY___END__;
3864 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3869 if (strEQ(d,"and")) return -KEY_and;
3870 if (strEQ(d,"abs")) return -KEY_abs;
3873 if (strEQ(d,"alarm")) return -KEY_alarm;
3874 if (strEQ(d,"atan2")) return -KEY_atan2;
3877 if (strEQ(d,"accept")) return -KEY_accept;
3882 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3885 if (strEQ(d,"bless")) return -KEY_bless;
3886 if (strEQ(d,"bind")) return -KEY_bind;
3887 if (strEQ(d,"binmode")) return -KEY_binmode;
3890 if (strEQ(d,"CORE")) return -KEY_CORE;
3895 if (strEQ(d,"cmp")) return -KEY_cmp;
3896 if (strEQ(d,"chr")) return -KEY_chr;
3897 if (strEQ(d,"cos")) return -KEY_cos;
3900 if (strEQ(d,"chop")) return KEY_chop;
3903 if (strEQ(d,"close")) return -KEY_close;
3904 if (strEQ(d,"chdir")) return -KEY_chdir;
3905 if (strEQ(d,"chomp")) return KEY_chomp;
3906 if (strEQ(d,"chmod")) return -KEY_chmod;
3907 if (strEQ(d,"chown")) return -KEY_chown;
3908 if (strEQ(d,"crypt")) return -KEY_crypt;
3911 if (strEQ(d,"chroot")) return -KEY_chroot;
3912 if (strEQ(d,"caller")) return -KEY_caller;
3915 if (strEQ(d,"connect")) return -KEY_connect;
3918 if (strEQ(d,"closedir")) return -KEY_closedir;
3919 if (strEQ(d,"continue")) return -KEY_continue;
3924 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3929 if (strEQ(d,"do")) return KEY_do;
3932 if (strEQ(d,"die")) return -KEY_die;
3935 if (strEQ(d,"dump")) return -KEY_dump;
3938 if (strEQ(d,"delete")) return KEY_delete;
3941 if (strEQ(d,"defined")) return KEY_defined;
3942 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3945 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3950 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3951 if (strEQ(d,"END")) return KEY_END;
3956 if (strEQ(d,"eq")) return -KEY_eq;
3959 if (strEQ(d,"eof")) return -KEY_eof;
3960 if (strEQ(d,"exp")) return -KEY_exp;
3963 if (strEQ(d,"else")) return KEY_else;
3964 if (strEQ(d,"exit")) return -KEY_exit;
3965 if (strEQ(d,"eval")) return KEY_eval;
3966 if (strEQ(d,"exec")) return -KEY_exec;
3967 if (strEQ(d,"each")) return KEY_each;
3970 if (strEQ(d,"elsif")) return KEY_elsif;
3973 if (strEQ(d,"exists")) return KEY_exists;
3974 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3977 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3978 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3981 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3984 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3985 if (strEQ(d,"endservent")) return -KEY_endservent;
3988 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3995 if (strEQ(d,"for")) return KEY_for;
3998 if (strEQ(d,"fork")) return -KEY_fork;
4001 if (strEQ(d,"fcntl")) return -KEY_fcntl;
4002 if (strEQ(d,"flock")) return -KEY_flock;
4005 if (strEQ(d,"format")) return KEY_format;
4006 if (strEQ(d,"fileno")) return -KEY_fileno;
4009 if (strEQ(d,"foreach")) return KEY_foreach;
4012 if (strEQ(d,"formline")) return -KEY_formline;
4018 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
4019 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4023 if (strnEQ(d,"get",3)) {
4028 if (strEQ(d,"ppid")) return -KEY_getppid;
4029 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4032 if (strEQ(d,"pwent")) return -KEY_getpwent;
4033 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4034 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4037 if (strEQ(d,"peername")) return -KEY_getpeername;
4038 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4039 if (strEQ(d,"priority")) return -KEY_getpriority;
4042 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4045 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4049 else if (*d == 'h') {
4050 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4051 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4052 if (strEQ(d,"hostent")) return -KEY_gethostent;
4054 else if (*d == 'n') {
4055 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4056 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4057 if (strEQ(d,"netent")) return -KEY_getnetent;
4059 else if (*d == 's') {
4060 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4061 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4062 if (strEQ(d,"servent")) return -KEY_getservent;
4063 if (strEQ(d,"sockname")) return -KEY_getsockname;
4064 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4066 else if (*d == 'g') {
4067 if (strEQ(d,"grent")) return -KEY_getgrent;
4068 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4069 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4071 else if (*d == 'l') {
4072 if (strEQ(d,"login")) return -KEY_getlogin;
4074 else if (strEQ(d,"c")) return -KEY_getc;
4079 if (strEQ(d,"gt")) return -KEY_gt;
4080 if (strEQ(d,"ge")) return -KEY_ge;
4083 if (strEQ(d,"grep")) return KEY_grep;
4084 if (strEQ(d,"goto")) return KEY_goto;
4085 if (strEQ(d,"glob")) return KEY_glob;
4088 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4093 if (strEQ(d,"hex")) return -KEY_hex;
4096 if (strEQ(d,"INIT")) return KEY_INIT;
4101 if (strEQ(d,"if")) return KEY_if;
4104 if (strEQ(d,"int")) return -KEY_int;
4107 if (strEQ(d,"index")) return -KEY_index;
4108 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4113 if (strEQ(d,"join")) return -KEY_join;
4117 if (strEQ(d,"keys")) return KEY_keys;
4118 if (strEQ(d,"kill")) return -KEY_kill;
4123 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4124 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4130 if (strEQ(d,"lt")) return -KEY_lt;
4131 if (strEQ(d,"le")) return -KEY_le;
4132 if (strEQ(d,"lc")) return -KEY_lc;
4135 if (strEQ(d,"log")) return -KEY_log;
4138 if (strEQ(d,"last")) return KEY_last;
4139 if (strEQ(d,"link")) return -KEY_link;
4140 if (strEQ(d,"lock")) return -KEY_lock;
4143 if (strEQ(d,"local")) return KEY_local;
4144 if (strEQ(d,"lstat")) return -KEY_lstat;
4147 if (strEQ(d,"length")) return -KEY_length;
4148 if (strEQ(d,"listen")) return -KEY_listen;
4151 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4154 if (strEQ(d,"localtime")) return -KEY_localtime;
4160 case 1: return KEY_m;
4162 if (strEQ(d,"my")) return KEY_my;
4165 if (strEQ(d,"map")) return KEY_map;
4168 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4171 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4172 if (strEQ(d,"msgget")) return -KEY_msgget;
4173 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4174 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4179 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4182 if (strEQ(d,"next")) return KEY_next;
4183 if (strEQ(d,"ne")) return -KEY_ne;
4184 if (strEQ(d,"not")) return -KEY_not;
4185 if (strEQ(d,"no")) return KEY_no;
4190 if (strEQ(d,"or")) return -KEY_or;
4193 if (strEQ(d,"ord")) return -KEY_ord;
4194 if (strEQ(d,"oct")) return -KEY_oct;
4197 if (strEQ(d,"open")) return -KEY_open;
4200 if (strEQ(d,"opendir")) return -KEY_opendir;
4207 if (strEQ(d,"pop")) return KEY_pop;
4208 if (strEQ(d,"pos")) return KEY_pos;
4211 if (strEQ(d,"push")) return KEY_push;
4212 if (strEQ(d,"pack")) return -KEY_pack;
4213 if (strEQ(d,"pipe")) return -KEY_pipe;
4216 if (strEQ(d,"print")) return KEY_print;
4219 if (strEQ(d,"printf")) return KEY_printf;
4222 if (strEQ(d,"package")) return KEY_package;
4225 if (strEQ(d,"prototype")) return KEY_prototype;
4230 if (strEQ(d,"q")) return KEY_q;
4231 if (strEQ(d,"qq")) return KEY_qq;
4232 if (strEQ(d,"qw")) return KEY_qw;
4233 if (strEQ(d,"qx")) return KEY_qx;
4235 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4240 if (strEQ(d,"ref")) return -KEY_ref;
4243 if (strEQ(d,"read")) return -KEY_read;
4244 if (strEQ(d,"rand")) return -KEY_rand;
4245 if (strEQ(d,"recv")) return -KEY_recv;
4246 if (strEQ(d,"redo")) return KEY_redo;
4249 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4250 if (strEQ(d,"reset")) return -KEY_reset;
4253 if (strEQ(d,"return")) return KEY_return;
4254 if (strEQ(d,"rename")) return -KEY_rename;
4255 if (strEQ(d,"rindex")) return -KEY_rindex;
4258 if (strEQ(d,"require")) return -KEY_require;
4259 if (strEQ(d,"reverse")) return -KEY_reverse;
4260 if (strEQ(d,"readdir")) return -KEY_readdir;
4263 if (strEQ(d,"readlink")) return -KEY_readlink;
4264 if (strEQ(d,"readline")) return -KEY_readline;
4265 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4268 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4274 case 0: return KEY_s;
4276 if (strEQ(d,"scalar")) return KEY_scalar;
4281 if (strEQ(d,"seek")) return -KEY_seek;
4282 if (strEQ(d,"send")) return -KEY_send;
4285 if (strEQ(d,"semop")) return -KEY_semop;
4288 if (strEQ(d,"select")) return -KEY_select;
4289 if (strEQ(d,"semctl")) return -KEY_semctl;
4290 if (strEQ(d,"semget")) return -KEY_semget;
4293 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4294 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4297 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4298 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4301 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4304 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4305 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4306 if (strEQ(d,"setservent")) return -KEY_setservent;
4309 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4310 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4317 if (strEQ(d,"shift")) return KEY_shift;
4320 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4321 if (strEQ(d,"shmget")) return -KEY_shmget;
4324 if (strEQ(d,"shmread")) return -KEY_shmread;
4327 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4328 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4333 if (strEQ(d,"sin")) return -KEY_sin;
4336 if (strEQ(d,"sleep")) return -KEY_sleep;
4339 if (strEQ(d,"sort")) return KEY_sort;
4340 if (strEQ(d,"socket")) return -KEY_socket;
4341 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4344 if (strEQ(d,"split")) return KEY_split;
4345 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4346 if (strEQ(d,"splice")) return KEY_splice;
4349 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4352 if (strEQ(d,"srand")) return -KEY_srand;
4355 if (strEQ(d,"stat")) return -KEY_stat;
4356 if (strEQ(d,"study")) return KEY_study;
4359 if (strEQ(d,"substr")) return -KEY_substr;
4360 if (strEQ(d,"sub")) return KEY_sub;
4365 if (strEQ(d,"system")) return -KEY_system;
4368 if (strEQ(d,"symlink")) return -KEY_symlink;
4369 if (strEQ(d,"syscall")) return -KEY_syscall;
4370 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4371 if (strEQ(d,"sysread")) return -KEY_sysread;
4372 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4375 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4384 if (strEQ(d,"tr")) return KEY_tr;
4387 if (strEQ(d,"tie")) return KEY_tie;
4390 if (strEQ(d,"tell")) return -KEY_tell;
4391 if (strEQ(d,"tied")) return KEY_tied;
4392 if (strEQ(d,"time")) return -KEY_time;
4395 if (strEQ(d,"times")) return -KEY_times;
4398 if (strEQ(d,"telldir")) return -KEY_telldir;
4401 if (strEQ(d,"truncate")) return -KEY_truncate;
4408 if (strEQ(d,"uc")) return -KEY_uc;
4411 if (strEQ(d,"use")) return KEY_use;
4414 if (strEQ(d,"undef")) return KEY_undef;
4415 if (strEQ(d,"until")) return KEY_until;
4416 if (strEQ(d,"untie")) return KEY_untie;
4417 if (strEQ(d,"utime")) return -KEY_utime;
4418 if (strEQ(d,"umask")) return -KEY_umask;
4421 if (strEQ(d,"unless")) return KEY_unless;
4422 if (strEQ(d,"unpack")) return -KEY_unpack;
4423 if (strEQ(d,"unlink")) return -KEY_unlink;
4426 if (strEQ(d,"unshift")) return KEY_unshift;
4427 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4432 if (strEQ(d,"values")) return -KEY_values;
4433 if (strEQ(d,"vec")) return -KEY_vec;
4438 if (strEQ(d,"warn")) return -KEY_warn;
4439 if (strEQ(d,"wait")) return -KEY_wait;
4442 if (strEQ(d,"while")) return KEY_while;
4443 if (strEQ(d,"write")) return -KEY_write;
4446 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4449 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4454 if (len == 1) return -KEY_x;
4455 if (strEQ(d,"xor")) return -KEY_xor;
4458 if (len == 1) return KEY_y;
4467 checkcomma(register char *s, char *name, char *what)
4471 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4473 for (w = s+2; *w && level; w++) {
4480 for (; *w && isSPACE(*w); w++) ;
4481 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4482 warn("%s (...) interpreted as function",name);
4484 while (s < bufend && isSPACE(*s))
4488 while (s < bufend && isSPACE(*s))
4490 if (isIDFIRST(*s)) {
4494 while (s < bufend && isSPACE(*s))
4499 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4503 croak("No comma allowed after %s", what);
4509 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4511 register char *d = dest;
4512 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4515 croak(ident_too_long);
4518 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4523 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4536 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4543 if (lex_brackets == 0)
4548 e = d + destlen - 3; /* two-character token, ending NUL */
4550 while (isDIGIT(*s)) {
4552 croak(ident_too_long);
4559 croak(ident_too_long);
4562 else if (*s == '\'' && isIDFIRST(s[1])) {
4567 else if (*s == ':' && s[1] == ':') {
4578 if (lex_state != LEX_NORMAL)
4579 lex_state = LEX_INTERPENDMAYBE;
4582 if (*s == '$' && s[1] &&
4583 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4585 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4586 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4599 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4604 if (isSPACE(s[-1])) {
4607 if (ch != ' ' && ch != '\t') {
4613 if (isIDFIRST(*d)) {
4615 while (isALNUM(*s) || *s == ':')
4618 while (s < send && (*s == ' ' || *s == '\t')) s++;
4619 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4620 if (dowarn && keyword(dest, d - dest)) {
4621 char *brack = *s == '[' ? "[...]" : "{...}";
4622 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4623 funny, dest, brack, funny, dest, brack);
4625 lex_fakebrack = lex_brackets+1;
4627 lex_brackstack[lex_brackets++] = XOPERATOR;
4633 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4634 lex_state = LEX_INTERPEND;
4637 if (dowarn && lex_state == LEX_NORMAL &&
4638 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4639 warn("Ambiguous use of %c{%s} resolved to %c%s",
4640 funny, dest, funny, dest);
4643 s = bracket; /* let the parser handle it */
4647 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4648 lex_state = LEX_INTERPEND;
4652 void pmflag(U16 *pmfl, int ch)
4657 *pmfl |= PMf_GLOBAL;
4659 *pmfl |= PMf_CONTINUE;
4663 *pmfl |= PMf_MULTILINE;
4665 *pmfl |= PMf_SINGLELINE;
4667 *pmfl |= PMf_EXTENDED;
4671 scan_pat(char *start)
4676 s = scan_str(start);
4679 SvREFCNT_dec(lex_stuff);
4681 croak("Search pattern not terminated");
4684 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4685 if (multi_open == '?')
4686 pm->op_pmflags |= PMf_ONCE;
4687 while (*s && strchr("iogcmsx", *s))
4688 pmflag(&pm->op_pmflags,*s++);
4689 pm->op_pmpermflags = pm->op_pmflags;
4692 yylval.ival = OP_MATCH;
4697 scan_subst(char *start)
4704 yylval.ival = OP_NULL;
4706 s = scan_str(start);
4710 SvREFCNT_dec(lex_stuff);
4712 croak("Substitution pattern not terminated");
4715 if (s[-1] == multi_open)
4718 first_start = multi_start;
4722 SvREFCNT_dec(lex_stuff);
4725 SvREFCNT_dec(lex_repl);
4727 croak("Substitution replacement not terminated");
4729 multi_start = first_start; /* so whole substitution is taken together */
4731 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4732 while (*s && strchr("iogcmsex", *s)) {
4738 pmflag(&pm->op_pmflags,*s++);
4743 pm->op_pmflags |= PMf_EVAL;
4744 repl = newSVpv("",0);
4746 sv_catpv(repl, es ? "eval " : "do ");
4747 sv_catpvn(repl, "{ ", 2);
4748 sv_catsv(repl, lex_repl);
4749 sv_catpvn(repl, " };", 2);
4750 SvCOMPILED_on(repl);
4751 SvREFCNT_dec(lex_repl);
4755 pm->op_pmpermflags = pm->op_pmflags;
4757 yylval.ival = OP_SUBST;
4762 scan_trans(char *start)
4771 yylval.ival = OP_NULL;
4773 s = scan_str(start);
4776 SvREFCNT_dec(lex_stuff);
4778 croak("Translation pattern not terminated");
4780 if (s[-1] == multi_open)
4786 SvREFCNT_dec(lex_stuff);
4789 SvREFCNT_dec(lex_repl);
4791 croak("Translation replacement not terminated");
4794 New(803,tbl,256,short);
4795 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4797 complement = Delete = squash = 0;
4798 while (*s == 'c' || *s == 'd' || *s == 's') {
4800 complement = OPpTRANS_COMPLEMENT;
4802 Delete = OPpTRANS_DELETE;
4804 squash = OPpTRANS_SQUASH;
4807 o->op_private = Delete|squash|complement;
4810 yylval.ival = OP_TRANS;
4815 scan_heredoc(register char *s)
4819 I32 op_type = OP_SCALAR;
4826 int outer = (rsfp && !lex_inwhat);
4830 e = tokenbuf + sizeof tokenbuf - 1;
4833 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4834 if (*peek && strchr("`'\"",*peek)) {
4837 s = delimcpy(d, e, s, bufend, term, &len);
4848 deprecate("bare << to mean <<\"\"");
4849 for (; isALNUM(*s); s++) {
4854 if (d >= tokenbuf + sizeof tokenbuf - 1)
4855 croak("Delimiter for here document is too long");
4860 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4861 herewas = newSVpv(s,bufend-s);
4863 s--, herewas = newSVpv(s,d-s);
4864 s += SvCUR(herewas);
4866 tmpstr = NEWSV(87,80);
4867 sv_upgrade(tmpstr, SVt_PVIV);
4872 else if (term == '`') {
4873 op_type = OP_BACKTICK;
4874 SvIVX(tmpstr) = '\\';
4878 multi_start = curcop->cop_line;
4879 multi_open = multi_close = '<';
4883 while (s < bufend &&
4884 (*s != term || memNE(s,tokenbuf,len)) ) {
4889 curcop->cop_line = multi_start;
4890 missingterm(tokenbuf);
4892 sv_setpvn(tmpstr,d+1,s-d);
4894 curcop->cop_line++; /* the preceding stmt passes a newline */
4896 sv_catpvn(herewas,s,bufend-s);
4897 sv_setsv(linestr,herewas);
4898 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4899 bufend = SvPVX(linestr) + SvCUR(linestr);
4902 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4903 while (s >= bufend) { /* multiple line string? */
4905 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4906 curcop->cop_line = multi_start;
4907 missingterm(tokenbuf);
4910 if (PERLDB_LINE && curstash != debstash) {
4911 SV *sv = NEWSV(88,0);
4913 sv_upgrade(sv, SVt_PVMG);
4914 sv_setsv(sv,linestr);
4915 av_store(GvAV(curcop->cop_filegv),
4916 (I32)curcop->cop_line,sv);
4918 bufend = SvPVX(linestr) + SvCUR(linestr);
4919 if (*s == term && memEQ(s,tokenbuf,len)) {
4922 sv_catsv(linestr,herewas);
4923 bufend = SvPVX(linestr) + SvCUR(linestr);
4927 sv_catsv(tmpstr,linestr);
4930 multi_end = curcop->cop_line;
4932 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4933 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4934 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4936 SvREFCNT_dec(herewas);
4938 yylval.ival = op_type;
4943 scan_inputsymbol(char *start)
4945 register char *s = start;
4951 e = tokenbuf + sizeof tokenbuf;
4952 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4953 if (len >= sizeof tokenbuf)
4954 croak("Excessively long <> operator");
4956 croak("Unterminated <> operator");
4958 if (*d == '$' && d[1]) d++;
4959 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4961 if (d - tokenbuf != len) {
4962 yylval.ival = OP_GLOB;
4964 s = scan_str(start);
4966 croak("Glob not terminated");
4972 (void)strcpy(d,"ARGV");
4975 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4976 OP *o = newOP(OP_PADSV, 0);
4978 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4981 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4982 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4983 newUNOP(OP_RV2GV, 0,
4984 newUNOP(OP_RV2SV, 0,
4985 newGVOP(OP_GV, 0, gv))));
4987 yylval.ival = OP_NULL;
4990 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4991 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4992 yylval.ival = OP_NULL;
4999 scan_str(char *start)
5004 register char *s = start;
5013 multi_start = curcop->cop_line;
5015 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
5020 sv_upgrade(sv, SVt_PVIV);
5022 (void)SvPOK_only(sv); /* validate pointer */
5025 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
5026 to = SvPVX(sv)+SvCUR(sv);
5027 if (multi_open == multi_close) {
5028 for (; s < bufend; s++,to++) {
5029 if (*s == '\n' && !rsfp)
5031 if (*s == '\\' && s+1 < bufend && term != '\\') {
5037 else if (*s == term)
5043 for (; s < bufend; s++,to++) {
5044 if (*s == '\n' && !rsfp)
5046 if (*s == '\\' && s+1 < bufend) {
5047 if ((s[1] == multi_open) || (s[1] == multi_close))
5052 else if (*s == multi_close && --brackets <= 0)
5054 else if (*s == multi_open)
5060 SvCUR_set(sv, to - SvPVX(sv));
5062 if (s < bufend) break; /* string ends on this line? */
5065 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5067 curcop->cop_line = multi_start;
5071 if (PERLDB_LINE && curstash != debstash) {
5072 SV *sv = NEWSV(88,0);
5074 sv_upgrade(sv, SVt_PVMG);
5075 sv_setsv(sv,linestr);
5076 av_store(GvAV(curcop->cop_filegv),
5077 (I32)curcop->cop_line, sv);
5079 bufend = SvPVX(linestr) + SvCUR(linestr);
5081 multi_end = curcop->cop_line;
5083 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5084 SvLEN_set(sv, SvCUR(sv) + 1);
5085 Renew(SvPVX(sv), SvLEN(sv), char);
5095 scan_num(char *start)
5097 register char *s = start;
5105 static char number_too_long[] = "Number too long";
5109 croak("panic: scan_num");
5114 bool overflowed = FALSE;
5120 else if (s[1] == '.')
5136 yyerror("Illegal octal digit");
5138 case '0': case '1': case '2': case '3': case '4':
5139 case '5': case '6': case '7':
5142 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5143 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5149 if (!overflowed && (n >> shift) != u) {
5150 warn("Integer overflow in %s number",
5151 (shift == 4) ? "hex" : "octal");
5163 case '1': case '2': case '3': case '4': case '5':
5164 case '6': case '7': case '8': case '9': case '.':
5167 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5169 while (isDIGIT(*s) || *s == '_') {
5171 if (dowarn && lastub && s - lastub != 3)
5172 warn("Misplaced _ in number");
5177 croak(number_too_long);
5181 if (dowarn && lastub && s - lastub != 3)
5182 warn("Misplaced _ in number");
5183 if (*s == '.' && s[1] != '.') {
5186 for (; isDIGIT(*s) || *s == '_'; s++) {
5188 croak(number_too_long);
5193 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5196 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5197 if (*s == '+' || *s == '-')
5199 while (isDIGIT(*s)) {
5201 croak(number_too_long);
5207 SET_NUMERIC_STANDARD();
5208 value = atof(tokenbuf);
5210 if (!floatit && (double)tryiv == value)
5211 sv_setiv(sv, tryiv);
5213 sv_setnv(sv, value);
5217 yylval.opval = newSVOP(OP_CONST, 0, sv);
5223 scan_formline(register char *s)
5228 SV *stuff = newSVpv("",0);
5229 bool needargs = FALSE;
5232 if (*s == '.' || *s == '}') {
5234 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5238 if (in_eval && !rsfp) {
5239 eol = strchr(s,'\n');
5244 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5246 for (t = s; t < eol; t++) {
5247 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5249 goto enough; /* ~~ must be first line in formline */
5251 if (*t == '@' || *t == '^')
5254 sv_catpvn(stuff, s, eol-s);
5258 s = filter_gets(linestr, rsfp, 0);
5259 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5260 bufend = bufptr + SvCUR(linestr);
5263 yyerror("Format not terminated");
5273 lex_state = LEX_NORMAL;
5274 nextval[nexttoke].ival = 0;
5278 lex_state = LEX_FORMLINE;
5279 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5281 nextval[nexttoke].ival = OP_FORMLINE;
5285 SvREFCNT_dec(stuff);
5297 cshlen = strlen(cshname);
5302 start_subparse(I32 is_format, U32 flags)
5305 I32 oldsavestack_ix = savestack_ix;
5306 CV* outsidecv = compcv;
5310 assert(SvTYPE(compcv) == SVt_PVCV);
5317 SAVESPTR(comppad_name);
5319 SAVEI32(comppad_name_fill);
5320 SAVEI32(min_intro_pending);
5321 SAVEI32(max_intro_pending);
5322 SAVEI32(pad_reset_pending);
5324 compcv = (CV*)NEWSV(1104,0);
5325 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5326 CvFLAGS(compcv) |= flags;
5329 av_push(comppad, Nullsv);
5330 curpad = AvARRAY(comppad);
5331 comppad_name = newAV();
5332 comppad_name_fill = 0;
5333 min_intro_pending = 0;
5335 subline = curcop->cop_line;
5337 av_store(comppad_name, 0, newSVpv("@_", 2));
5338 curpad[0] = (SV*)newAV();
5339 SvPADMY_on(curpad[0]); /* XXX Needed? */
5340 CvOWNER(compcv) = 0;
5341 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5342 MUTEX_INIT(CvMUTEXP(compcv));
5343 #endif /* USE_THREADS */
5345 comppadlist = newAV();
5346 AvREAL_off(comppadlist);
5347 av_store(comppadlist, 0, (SV*)comppad_name);
5348 av_store(comppadlist, 1, (SV*)comppad);
5350 CvPADLIST(compcv) = comppadlist;
5351 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5353 CvOWNER(compcv) = 0;
5354 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5355 MUTEX_INIT(CvMUTEXP(compcv));
5356 #endif /* USE_THREADS */
5358 return oldsavestack_ix;
5377 char *context = NULL;
5381 if (!yychar || (yychar == ';' && !rsfp))
5383 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5384 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5385 while (isSPACE(*oldoldbufptr))
5387 context = oldoldbufptr;
5388 contlen = bufptr - oldoldbufptr;
5390 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5391 oldbufptr != bufptr) {
5392 while (isSPACE(*oldbufptr))
5394 context = oldbufptr;
5395 contlen = bufptr - oldbufptr;
5397 else if (yychar > 255)
5398 where = "next token ???";
5399 else if ((yychar & 127) == 127) {
5400 if (lex_state == LEX_NORMAL ||
5401 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5402 where = "at end of line";
5404 where = "within pattern";
5406 where = "within string";
5409 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5411 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5412 else if (isPRINT_LC(yychar))
5413 sv_catpvf(where_sv, "%c", yychar);
5415 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5416 where = SvPVX(where_sv);
5418 msg = sv_2mortal(newSVpv(s, 0));
5419 sv_catpvf(msg, " at %_ line %ld, ",
5420 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5422 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5424 sv_catpvf(msg, "%s\n", where);
5425 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5427 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5428 (int)multi_open,(int)multi_close,(long)multi_start);
5434 sv_catsv(ERRSV, msg);
5436 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5437 if (++error_count >= 10)
5438 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5440 in_my_stash = Nullhv;