3 * Copyright (c) 1991-1997, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "It all comes from here, the stench and the peril." --Frodo
18 static void check_uni _((void));
19 static void force_next _((I32 type));
20 static char *force_version _((char *start));
21 static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
22 static SV *tokeq _((SV *sv));
23 static char *scan_const _((char *start));
24 static char *scan_formline _((char *s));
25 static char *scan_heredoc _((char *s));
26 static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
28 static char *scan_inputsymbol _((char *start));
29 static char *scan_pat _((char *start));
30 static char *scan_str _((char *start));
31 static char *scan_subst _((char *start));
32 static char *scan_trans _((char *start));
33 static char *scan_word _((char *s, char *dest, STRLEN destlen,
34 int allow_package, STRLEN *slp));
35 static char *skipspace _((char *s));
36 static void checkcomma _((char *s, char *name, char *what));
37 static void force_ident _((char *s, int kind));
38 static void incline _((char *s));
39 static int intuit_method _((char *s, GV *gv));
40 static int intuit_more _((char *s));
41 static I32 lop _((I32 f, expectation x, char *s));
42 static void missingterm _((char *s));
43 static void no_op _((char *what, char *s));
44 static void set_csh _((void));
45 static I32 sublex_done _((void));
46 static I32 sublex_push _((void));
47 static I32 sublex_start _((void));
49 static int uni _((I32 f, char *s));
51 static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
52 static void restore_rsfp _((void *f));
53 static void restore_expect _((void *e));
54 static void restore_lex_expect _((void *e));
55 #endif /* PERL_OBJECT */
57 static char ident_too_long[] = "Identifier too long";
59 static char *linestart; /* beg. of most recently read line */
61 static char pending_ident; /* pending identifier lookup */
64 I32 super_state; /* lexer state to save */
65 I32 sub_inwhat; /* "lex_inwhat" to use */
66 OP *sub_op; /* "lex_op" to use */
69 /* The following are arranged oddly so that the guard on the switch statement
70 * can get by with a single comparison (if the compiler is smart enough).
73 /* #define LEX_NOTPARSING 11 is done in perl.h. */
76 #define LEX_INTERPNORMAL 9
77 #define LEX_INTERPCASEMOD 8
78 #define LEX_INTERPPUSH 7
79 #define LEX_INTERPSTART 6
80 #define LEX_INTERPEND 5
81 #define LEX_INTERPENDMAYBE 4
82 #define LEX_INTERPCONCAT 3
83 #define LEX_INTERPCONST 2
84 #define LEX_FORMLINE 1
85 #define LEX_KNOWNEXT 0
94 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
96 # include <unistd.h> /* Needed for execv() */
104 #include "keywords.h"
109 #define CLINE (copline = (curcop->cop_line < copline ? curcop->cop_line : copline))
111 #define TOKEN(retval) return (bufptr = s,(int)retval)
112 #define OPERATOR(retval) return (expect = XTERM,bufptr = s,(int)retval)
113 #define AOPERATOR(retval) return ao((expect = XTERM,bufptr = s,(int)retval))
114 #define PREBLOCK(retval) return (expect = XBLOCK,bufptr = s,(int)retval)
115 #define PRETERMBLOCK(retval) return (expect = XTERMBLOCK,bufptr = s,(int)retval)
116 #define PREREF(retval) return (expect = XREF,bufptr = s,(int)retval)
117 #define TERM(retval) return (CLINE, expect = XOPERATOR,bufptr = s,(int)retval)
118 #define LOOPX(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LOOPEX)
119 #define FTST(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)UNIOP)
120 #define FUN0(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC0)
121 #define FUN1(f) return(yylval.ival = f,expect = XOPERATOR,bufptr = s,(int)FUNC1)
122 #define BOop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITOROP))
123 #define BAop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)BITANDOP))
124 #define SHop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)SHIFTOP))
125 #define PWop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)POWOP))
126 #define PMop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)MATCHOP)
127 #define Aop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)ADDOP))
128 #define Mop(f) return ao((yylval.ival=f,expect = XTERM,bufptr = s,(int)MULOP))
129 #define Eop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)EQOP)
130 #define Rop(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)RELOP)
132 /* This bit of chicanery makes a unary function followed by
133 * a parenthesis into a function with one argument, highest precedence.
135 #define UNI(f) return(yylval.ival = f, \
138 last_uni = oldbufptr, \
140 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
142 #define UNIBRACK(f) return(yylval.ival = f, \
144 last_uni = oldbufptr, \
145 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
147 /* grandfather return to old style */
148 #define OLDLOP(f) return(yylval.ival=f,expect = XTERM,bufptr = s,(int)LSTOP)
153 if (*bufptr == '=') {
155 if (toketype == ANDAND)
156 yylval.ival = OP_ANDASSIGN;
157 else if (toketype == OROR)
158 yylval.ival = OP_ORASSIGN;
165 no_op(char *what, char *s)
167 char *oldbp = bufptr;
168 bool is_first = (oldbufptr == linestart);
171 yywarn(form("%s found where operator expected", what));
173 warn("\t(Missing semicolon on previous line?)\n");
174 else if (oldoldbufptr && isIDFIRST(*oldoldbufptr)) {
176 for (t = oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
177 if (t < bufptr && isSPACE(*t))
178 warn("\t(Do you need to predeclare %.*s?)\n",
179 t - oldoldbufptr, oldoldbufptr);
183 warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
193 char *nl = strrchr(s,'\n');
197 else if (multi_close < 32 || multi_close == 127) {
199 tmpbuf[1] = toCTRL(multi_close);
205 *tmpbuf = multi_close;
209 q = strchr(s,'"') ? '\'' : '"';
210 croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
217 warn("Use of %s is deprecated", s);
223 deprecate("comma-less variable list");
229 win32_textfilter(int idx, SV *sv, int maxlen)
231 I32 count = FILTER_READ(idx+1, sv, maxlen);
232 if (count > 0 && !maxlen)
233 win32_strip_return(sv);
247 SAVEI32(lex_brackets);
248 SAVEI32(lex_fakebrack);
249 SAVEI32(lex_casemods);
254 SAVEI16(curcop->cop_line);
258 SAVEPPTR(oldoldbufptr);
261 SAVEPPTR(lex_brackstack);
262 SAVEPPTR(lex_casestack);
263 SAVEDESTRUCTOR(restore_rsfp, rsfp);
267 SAVEDESTRUCTOR(restore_expect, tokenbuf + expect); /* encode as pointer */
268 SAVEDESTRUCTOR(restore_lex_expect, tokenbuf + expect);
270 lex_state = LEX_NORMAL;
275 New(899, lex_brackstack, 120, char);
276 New(899, lex_casestack, 12, char);
277 SAVEFREEPV(lex_brackstack);
278 SAVEFREEPV(lex_casestack);
280 *lex_casestack = '\0';
288 if (SvREADONLY(linestr))
289 linestr = sv_2mortal(newSVsv(linestr));
290 s = SvPV(linestr, len);
291 if (len && s[len-1] != ';') {
292 if (!(SvFLAGS(linestr) & SVs_TEMP))
293 linestr = sv_2mortal(newSVsv(linestr));
294 sv_catpvn(linestr, "\n;", 2);
297 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
298 bufend = bufptr + SvCUR(linestr);
300 rs = newSVpv("\n", 1);
311 restore_rsfp(void *f)
313 PerlIO *fp = (PerlIO*)f;
315 if (rsfp == PerlIO_stdin())
316 PerlIO_clearerr(rsfp);
317 else if (rsfp && (rsfp != fp))
326 /* a safe way to store a small integer in a pointer */
327 expect = (expectation)((char *)e - tokenbuf);
331 restore_lex_expect(e)
334 /* a safe way to store a small integer in a pointer */
335 lex_expect = (expectation)((char *)e - tokenbuf);
350 while (*s == ' ' || *s == '\t') s++;
351 if (strnEQ(s, "line ", 5)) {
360 while (*s == ' ' || *s == '\t')
362 if (*s == '"' && (t = strchr(s+1, '"')))
366 return; /* false alarm */
367 for (t = s; !isSPACE(*t); t++) ;
372 curcop->cop_filegv = gv_fetchfile(s);
374 curcop->cop_filegv = gv_fetchfile(origfilename);
376 curcop->cop_line = atoi(n)-1;
380 skipspace(register char *s)
383 if (lex_formbrack && lex_brackets <= lex_formbrack) {
384 while (s < bufend && (*s == ' ' || *s == '\t'))
390 while (s < bufend && isSPACE(*s))
392 if (s < bufend && *s == '#') {
393 while (s < bufend && *s != '\n')
398 if (s < bufend || !rsfp || lex_state != LEX_NORMAL)
400 if ((s = filter_gets(linestr, rsfp, (prevlen = SvCUR(linestr)))) == Nullch) {
401 if (minus_n || minus_p) {
402 sv_setpv(linestr,minus_p ?
403 ";}continue{print or die qq(-p destination: $!\\n)" :
405 sv_catpv(linestr,";}");
406 minus_n = minus_p = 0;
409 sv_setpv(linestr,";");
410 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
411 bufend = SvPVX(linestr) + SvCUR(linestr);
412 if (preprocess && !in_eval)
413 (void)PerlProc_pclose(rsfp);
414 else if ((PerlIO*)rsfp == PerlIO_stdin())
415 PerlIO_clearerr(rsfp);
417 (void)PerlIO_close(rsfp);
423 linestart = bufptr = s + prevlen;
424 bufend = s + SvCUR(linestr);
427 if (PERLDB_LINE && curstash != debstash) {
428 SV *sv = NEWSV(85,0);
430 sv_upgrade(sv, SVt_PVMG);
431 sv_setpvn(sv,bufptr,bufend-bufptr);
432 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
443 if (oldoldbufptr != last_uni)
445 while (isSPACE(*last_uni))
447 for (s = last_uni; isALNUM(*s) || *s == '-'; s++) ;
448 if ((t = strchr(s, '(')) && t < bufptr)
452 warn("Warning: Use of \"%s\" without parens is ambiguous", last_uni);
459 #define UNI(f) return uni(f,s)
467 last_uni = oldbufptr;
478 #endif /* CRIPPLED_CC */
480 #define LOP(f,x) return lop(f,x,s)
485 (I32 f, expectation x, char *s)
491 #endif /* CAN_PROTOTYPE */
498 last_lop = oldbufptr;
514 nexttype[nexttoke] = type;
516 if (lex_state != LEX_KNOWNEXT) {
517 lex_defer = lex_state;
519 lex_state = LEX_KNOWNEXT;
524 force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
529 start = skipspace(start);
532 (allow_pack && *s == ':') ||
533 (allow_initial_tick && *s == '\'') )
535 s = scan_word(s, tokenbuf, sizeof tokenbuf, allow_pack, &len);
536 if (check_keyword && keyword(tokenbuf, len))
538 if (token == METHOD) {
548 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(tokenbuf,0));
549 nextval[nexttoke].opval->op_private |= OPpCONST_BARE;
556 force_ident(register char *s, int kind)
559 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
560 nextval[nexttoke].opval = o;
563 dTHR; /* just for in_eval */
564 o->op_private = OPpCONST_ENTERED;
565 /* XXX see note in pp_entereval() for why we forgo typo
566 warnings if the symbol must be introduced in an eval.
568 gv_fetchpv(s, in_eval ? GV_ADDMULTI : TRUE,
569 kind == '$' ? SVt_PV :
570 kind == '@' ? SVt_PVAV :
571 kind == '%' ? SVt_PVHV :
579 force_version(char *s)
581 OP *version = Nullop;
585 /* default VERSION number -- GBARR */
590 for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
591 if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
593 /* real VERSION number -- GBARR */
594 version = yylval.opval;
598 /* NOTE: The parser sees the package name and the VERSION swapped */
599 nextval[nexttoke].opval = version;
616 s = SvPV_force(sv, len);
620 while (s < send && *s != '\\')
627 if (s + 1 < send && (s[1] == '\\'))
628 s++; /* all that, just for this */
633 SvCUR_set(sv, d - SvPVX(sv));
641 register I32 op_type = yylval.ival;
643 if (op_type == OP_NULL) {
644 yylval.opval = lex_op;
648 if (op_type == OP_CONST || op_type == OP_READLINE) {
649 SV *sv = tokeq(lex_stuff);
651 char *p = SvPV(sv, len);
652 yylval.opval = (OP*)newSVOP(op_type, 0, newSVpv(p, len));
658 sublex_info.super_state = lex_state;
659 sublex_info.sub_inwhat = op_type;
660 sublex_info.sub_op = lex_op;
661 lex_state = LEX_INTERPPUSH;
665 yylval.opval = lex_op;
679 lex_state = sublex_info.super_state;
681 SAVEI32(lex_brackets);
682 SAVEI32(lex_fakebrack);
683 SAVEI32(lex_casemods);
688 SAVEI16(curcop->cop_line);
691 SAVEPPTR(oldoldbufptr);
694 SAVEPPTR(lex_brackstack);
695 SAVEPPTR(lex_casestack);
700 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
701 bufend += SvCUR(linestr);
707 New(899, lex_brackstack, 120, char);
708 New(899, lex_casestack, 12, char);
709 SAVEFREEPV(lex_brackstack);
710 SAVEFREEPV(lex_casestack);
712 *lex_casestack = '\0';
714 lex_state = LEX_INTERPCONCAT;
715 curcop->cop_line = multi_start;
717 lex_inwhat = sublex_info.sub_inwhat;
718 if (lex_inwhat == OP_MATCH || lex_inwhat == OP_SUBST)
719 lex_inpat = sublex_info.sub_op;
731 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
735 if (lex_casemods) { /* oops, we've got some unbalanced parens */
736 lex_state = LEX_INTERPCASEMOD;
740 /* Is there a right-hand side to take care of? */
741 if (lex_repl && (lex_inwhat == OP_SUBST || lex_inwhat == OP_TRANS)) {
744 bufend = bufptr = oldbufptr = oldoldbufptr = linestart = SvPVX(linestr);
745 bufend += SvCUR(linestr);
751 *lex_casestack = '\0';
753 if (SvCOMPILED(lex_repl)) {
754 lex_state = LEX_INTERPNORMAL;
758 lex_state = LEX_INTERPCONCAT;
764 bufend = SvPVX(linestr);
765 bufend += SvCUR(linestr);
772 scan_const(char *start)
774 register char *send = bufend;
775 SV *sv = NEWSV(93, send - start);
776 register char *s = start;
777 register char *d = SvPVX(sv);
778 bool dorange = FALSE;
782 ? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxc0123456789[{]} \t\n\r\f\v#"
783 : (lex_inwhat & OP_TRANS)
787 while (s < send || dorange) {
788 if (lex_inwhat == OP_TRANS) {
793 SvGROW(sv, SvLEN(sv) + 256);
797 for (i = (U8)*d; i <= max; i++)
802 else if (*s == '-' && s+1 < send && s != start) {
807 else if (*s == '(' && lex_inpat && s[1] == '?') {
809 while (s < send && *s != ')')
811 } else if (s[2] == '{') { /* This should march regcomp.c */
813 char *regparse = s + 3;
816 while (count && (c = *regparse)) {
817 if (c == '\\' && regparse[1])
825 if (*regparse == ')')
828 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
829 while (s < regparse && *s != ')')
833 else if (*s == '#' && lex_inpat &&
834 ((PMOP*)lex_inpat)->op_pmflags & PMf_EXTENDED) {
835 while (s+1 < send && *s != '\n')
838 else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
840 else if (*s == '$') {
841 if (!lex_inpat) /* not a regexp, so $ must be var */
843 if (s + 1 < send && !strchr("()| \n\t", s[1]))
844 break; /* in regexp, $ might be tail anchor */
846 if (*s == '\\' && s+1 < send) {
848 if (*s && strchr(leaveit, *s)) {
853 if (lex_inwhat == OP_SUBST && !lex_inpat &&
854 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
857 warn("\\%c better written as $%c", *s, *s);
861 if (lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
867 if (lex_inwhat == OP_TRANS) {
875 case '0': case '1': case '2': case '3':
876 case '4': case '5': case '6': case '7':
877 *d++ = scan_oct(s, 3, &len);
881 *d++ = scan_hex(++s, 2, &len);
917 SvCUR_set(sv, d - SvPVX(sv));
920 if (SvCUR(sv) + 5 < SvLEN(sv)) {
921 SvLEN_set(sv, SvCUR(sv) + 1);
922 Renew(SvPVX(sv), SvLEN(sv), char);
925 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
931 /* This is the one truly awful dwimmer necessary to conflate C and sed. */
933 intuit_more(register char *s)
937 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
939 if (*s != '{' && *s != '[')
944 /* In a pattern, so maybe we have {n,m}. */
961 /* On the other hand, maybe we have a character class */
964 if (*s == ']' || *s == '^')
967 int weight = 2; /* let's weigh the evidence */
969 unsigned char un_char = 0, last_un_char;
970 char *send = strchr(s,']');
971 char tmpbuf[sizeof tokenbuf * 4];
973 if (!send) /* has to be an expression */
979 else if (isDIGIT(*s)) {
981 if (isDIGIT(s[1]) && s[2] == ']')
987 for (; s < send; s++) {
988 last_un_char = un_char;
989 un_char = (unsigned char)*s;
994 weight -= seen[un_char] * 10;
996 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
997 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
1002 else if (*s == '$' && s[1] &&
1003 strchr("[#!%*<>()-=",s[1])) {
1004 if (/*{*/ strchr("])} =",s[2]))
1013 if (strchr("wds]",s[1]))
1015 else if (seen['\''] || seen['"'])
1017 else if (strchr("rnftbxcav",s[1]))
1019 else if (isDIGIT(s[1])) {
1021 while (s[1] && isDIGIT(s[1]))
1031 if (strchr("aA01! ",last_un_char))
1033 if (strchr("zZ79~",s[1]))
1037 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
1038 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1043 if (keyword(tmpbuf, d - tmpbuf))
1046 if (un_char == last_un_char + 1)
1048 weight -= seen[un_char];
1053 if (weight >= 0) /* probably a character class */
1061 intuit_method(char *start, GV *gv)
1063 char *s = start + (*start == '$');
1064 char tmpbuf[sizeof tokenbuf];
1072 if ((cv = GvCVu(gv))) {
1073 char *proto = SvPVX(cv);
1083 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
1084 if (*start == '$') {
1085 if (gv || last_lop_op == OP_PRINT || isUPPER(*tokenbuf))
1090 return *s == '(' ? FUNCMETH : METHOD;
1092 if (!keyword(tmpbuf, len)) {
1093 indirgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVCV);
1094 if (indirgv && GvCVu(indirgv))
1096 /* filehandle or package name makes it a method */
1097 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
1099 if ((bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
1100 return 0; /* no assumptions -- "=>" quotes bearword */
1101 nextval[nexttoke].opval =
1102 (OP*)newSVOP(OP_CONST, 0,
1104 nextval[nexttoke].opval->op_private =
1109 return *s == '(' ? FUNCMETH : METHOD;
1119 char *pdb = PerlEnv_getenv("PERL5DB");
1123 SETERRNO(0,SS$_NORMAL);
1124 return "BEGIN { require 'perl5db.pl' }";
1130 /* Encoded script support. filter_add() effectively inserts a
1131 * 'pre-processing' function into the current source input stream.
1132 * Note that the filter function only applies to the current source file
1133 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1135 * The datasv parameter (which may be NULL) can be used to pass
1136 * private data to this instance of the filter. The filter function
1137 * can recover the SV using the FILTER_DATA macro and use it to
1138 * store private buffers and state information.
1140 * The supplied datasv parameter is upgraded to a PVIO type
1141 * and the IoDIRP field is used to store the function pointer.
1142 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1143 * private use must be set using malloc'd pointers.
1145 static int filter_debug = 0;
1148 filter_add(filter_t funcp, SV *datasv)
1150 if (!funcp){ /* temporary handy debugging hack to be deleted */
1151 filter_debug = atoi((char*)datasv);
1155 rsfp_filters = newAV();
1157 datasv = NEWSV(255,0);
1158 if (!SvUPGRADE(datasv, SVt_PVIO))
1159 die("Can't upgrade filter_add data to SVt_PVIO");
1160 IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
1162 warn("filter_add func %p (%s)", funcp, SvPV(datasv,na));
1163 av_unshift(rsfp_filters, 1);
1164 av_store(rsfp_filters, 0, datasv) ;
1169 /* Delete most recently added instance of this filter function. */
1171 filter_del(filter_t funcp)
1174 warn("filter_del func %p", funcp);
1175 if (!rsfp_filters || AvFILLp(rsfp_filters)<0)
1177 /* if filter is on top of stack (usual case) just pop it off */
1178 if (IoDIRP(FILTER_DATA(AvFILLp(rsfp_filters))) == (void*)funcp){
1179 sv_free(av_pop(rsfp_filters));
1183 /* we need to search for the correct entry and clear it */
1184 die("filter_del can only delete in reverse order (currently)");
1188 /* Invoke the n'th filter function for the current rsfp. */
1190 filter_read(int idx, SV *buf_sv, int maxlen)
1193 /* 0 = read one text line */
1200 if (idx > AvFILLp(rsfp_filters)){ /* Any more filters? */
1201 /* Provide a default input filter to make life easy. */
1202 /* Note that we append to the line. This is handy. */
1204 warn("filter_read %d: from rsfp\n", idx);
1208 int old_len = SvCUR(buf_sv) ;
1210 /* ensure buf_sv is large enough */
1211 SvGROW(buf_sv, old_len + maxlen) ;
1212 if ((len = PerlIO_read(rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
1213 if (PerlIO_error(rsfp))
1214 return -1; /* error */
1216 return 0 ; /* end of file */
1218 SvCUR_set(buf_sv, old_len + len) ;
1221 if (sv_gets(buf_sv, rsfp, SvCUR(buf_sv)) == NULL) {
1222 if (PerlIO_error(rsfp))
1223 return -1; /* error */
1225 return 0 ; /* end of file */
1229 return SvCUR(buf_sv);
1231 /* Skip this filter slot if filter has been deleted */
1232 if ( (datasv = FILTER_DATA(idx)) == &sv_undef){
1234 warn("filter_read %d: skipped (filter deleted)\n", idx);
1235 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
1237 /* Get function pointer hidden within datasv */
1238 funcp = (filter_t)IoDIRP(datasv);
1240 warn("filter_read %d: via function %p (%s)\n",
1241 idx, funcp, SvPV(datasv,na));
1242 /* Call function. The function is expected to */
1243 /* call "FILTER_READ(idx+1, buf_sv)" first. */
1244 /* Return: <0:error, =0:eof, >0:not eof */
1245 return (*funcp)(idx, buf_sv, maxlen);
1250 filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
1253 if (!rsfp_filters) {
1254 filter_add(win32_textfilter,NULL);
1260 SvCUR_set(sv, 0); /* start with empty line */
1261 if (FILTER_READ(0, sv, 0) > 0)
1262 return ( SvPVX(sv) ) ;
1267 return (sv_gets(sv, fp, append));
1272 static char* exp_name[] =
1273 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
1276 EXT int yychar; /* last token */
1289 if (pending_ident) {
1290 char pit = pending_ident;
1294 if (strchr(tokenbuf,':'))
1295 croak(no_myglob,tokenbuf);
1296 yylval.opval = newOP(OP_PADANY, 0);
1297 yylval.opval->op_targ = pad_allocmy(tokenbuf);
1301 if (!strchr(tokenbuf,':')) {
1303 /* Check for single character per-thread SVs */
1304 if (tokenbuf[0] == '$' && tokenbuf[2] == '\0'
1305 && !isALPHA(tokenbuf[1]) /* Rule out obvious non-threadsvs */
1306 && (tmp = find_threadsv(&tokenbuf[1])) != NOT_IN_PAD)
1308 yylval.opval = newOP(OP_THREADSV, 0);
1309 yylval.opval->op_targ = tmp;
1312 #endif /* USE_THREADS */
1313 if ((tmp = pad_findmy(tokenbuf)) != NOT_IN_PAD) {
1314 if (last_lop_op == OP_SORT &&
1315 tokenbuf[0] == '$' &&
1316 (tokenbuf[1] == 'a' || tokenbuf[1] == 'b')
1319 for (d = in_eval ? oldoldbufptr : linestart;
1320 d < bufend && *d != '\n';
1323 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
1324 croak("Can't use \"my %s\" in sort comparison",
1330 yylval.opval = newOP(OP_PADANY, 0);
1331 yylval.opval->op_targ = tmp;
1336 /* Force them to make up their mind on "@foo". */
1337 if (pit == '@' && lex_state != LEX_NORMAL && !lex_brackets) {
1338 GV *gv = gv_fetchpv(tokenbuf+1, FALSE, SVt_PVAV);
1339 if (!gv || ((tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
1340 yyerror(form("In string, %s now must be written as \\%s",
1341 tokenbuf, tokenbuf));
1344 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf+1, 0));
1345 yylval.opval->op_private = OPpCONST_ENTERED;
1346 gv_fetchpv(tokenbuf+1, in_eval ? GV_ADDMULTI : TRUE,
1347 ((tokenbuf[0] == '$') ? SVt_PV
1348 : (tokenbuf[0] == '@') ? SVt_PVAV
1353 switch (lex_state) {
1355 case LEX_NORMAL: /* Some compilers will produce faster */
1356 case LEX_INTERPNORMAL: /* code if we comment these out. */
1362 yylval = nextval[nexttoke];
1364 lex_state = lex_defer;
1365 expect = lex_expect;
1366 lex_defer = LEX_NORMAL;
1368 return(nexttype[nexttoke]);
1370 case LEX_INTERPCASEMOD:
1372 if (bufptr != bufend && *bufptr != '\\')
1373 croak("panic: INTERPCASEMOD");
1375 if (bufptr == bufend || bufptr[1] == 'E') {
1378 oldmod = lex_casestack[--lex_casemods];
1379 lex_casestack[lex_casemods] = '\0';
1380 if (bufptr != bufend && strchr("LUQ", oldmod)) {
1382 lex_state = LEX_INTERPCONCAT;
1386 if (bufptr != bufend)
1388 lex_state = LEX_INTERPCONCAT;
1393 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
1394 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
1395 if (strchr("LU", *s) &&
1396 (strchr(lex_casestack, 'L') || strchr(lex_casestack, 'U')))
1398 lex_casestack[--lex_casemods] = '\0';
1401 if (lex_casemods > 10) {
1402 char* newlb = Renew(lex_casestack, lex_casemods + 2, char);
1403 if (newlb != lex_casestack) {
1405 lex_casestack = newlb;
1408 lex_casestack[lex_casemods++] = *s;
1409 lex_casestack[lex_casemods] = '\0';
1410 lex_state = LEX_INTERPCONCAT;
1411 nextval[nexttoke].ival = 0;
1414 nextval[nexttoke].ival = OP_LCFIRST;
1416 nextval[nexttoke].ival = OP_UCFIRST;
1418 nextval[nexttoke].ival = OP_LC;
1420 nextval[nexttoke].ival = OP_UC;
1422 nextval[nexttoke].ival = OP_QUOTEMETA;
1424 croak("panic: yylex");
1436 case LEX_INTERPPUSH:
1437 return sublex_push();
1439 case LEX_INTERPSTART:
1440 if (bufptr == bufend)
1441 return sublex_done();
1443 lex_dojoin = (*bufptr == '@');
1444 lex_state = LEX_INTERPNORMAL;
1446 nextval[nexttoke].ival = 0;
1449 nextval[nexttoke].opval = newOP(OP_THREADSV, 0);
1450 nextval[nexttoke].opval->op_targ = find_threadsv("\"");
1451 force_next(PRIVATEREF);
1453 force_ident("\"", '$');
1454 #endif /* USE_THREADS */
1455 nextval[nexttoke].ival = 0;
1457 nextval[nexttoke].ival = 0;
1459 nextval[nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
1468 case LEX_INTERPENDMAYBE:
1469 if (intuit_more(bufptr)) {
1470 lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
1478 lex_state = LEX_INTERPCONCAT;
1482 case LEX_INTERPCONCAT:
1485 croak("panic: INTERPCONCAT");
1487 if (bufptr == bufend)
1488 return sublex_done();
1490 if (SvIVX(linestr) == '\'') {
1491 SV *sv = newSVsv(linestr);
1494 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
1498 s = scan_const(bufptr);
1500 lex_state = LEX_INTERPCASEMOD;
1502 lex_state = LEX_INTERPSTART;
1506 nextval[nexttoke] = yylval;
1519 lex_state = LEX_NORMAL;
1520 s = scan_formline(bufptr);
1527 oldoldbufptr = oldbufptr;
1530 PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[expect], s);
1536 croak("Unrecognized character \\%03o", *s & 255);
1539 goto fake_eof; /* emulate EOF on ^D or ^Z */
1545 yyerror("Missing right bracket");
1549 goto retry; /* ignore stray nulls */
1552 if (!in_eval && !preambled) {
1554 sv_setpv(linestr,incl_perldb());
1556 sv_catpv(linestr,";");
1558 while(AvFILLp(preambleav) >= 0) {
1559 SV *tmpsv = av_shift(preambleav);
1560 sv_catsv(linestr, tmpsv);
1561 sv_catpv(linestr, ";");
1564 sv_free((SV*)preambleav);
1567 if (minus_n || minus_p) {
1568 sv_catpv(linestr, "LINE: while (<>) {");
1570 sv_catpv(linestr,"chomp;");
1572 GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
1574 GvIMPORTED_AV_on(gv);
1576 if (strchr("/'\"", *splitstr)
1577 && strchr(splitstr + 1, *splitstr))
1578 sv_catpvf(linestr, "@F=split(%s);", splitstr);
1581 s = "'~#\200\1'"; /* surely one char is unused...*/
1582 while (s[1] && strchr(splitstr, *s)) s++;
1584 sv_catpvf(linestr, "@F=split(%s%c",
1585 "q" + (delim == '\''), delim);
1586 for (s = splitstr; *s; s++) {
1588 sv_catpvn(linestr, "\\", 1);
1589 sv_catpvn(linestr, s, 1);
1591 sv_catpvf(linestr, "%c);", delim);
1595 sv_catpv(linestr,"@F=split(' ');");
1598 sv_catpv(linestr, "\n");
1599 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1600 bufend = SvPVX(linestr) + SvCUR(linestr);
1601 if (PERLDB_LINE && curstash != debstash) {
1602 SV *sv = NEWSV(85,0);
1604 sv_upgrade(sv, SVt_PVMG);
1605 sv_setsv(sv,linestr);
1606 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1611 if ((s = filter_gets(linestr, rsfp, 0)) == Nullch) {
1614 if (preprocess && !in_eval)
1615 (void)PerlProc_pclose(rsfp);
1616 else if ((PerlIO *)rsfp == PerlIO_stdin())
1617 PerlIO_clearerr(rsfp);
1619 (void)PerlIO_close(rsfp);
1624 if (!in_eval && (minus_n || minus_p)) {
1625 sv_setpv(linestr,minus_p ? ";}continue{print" : "");
1626 sv_catpv(linestr,";}");
1627 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1628 bufend = SvPVX(linestr) + SvCUR(linestr);
1629 minus_n = minus_p = 0;
1632 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1633 sv_setpv(linestr,"");
1634 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
1637 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
1640 /* Incest with pod. */
1641 if (*s == '=' && strnEQ(s, "=cut", 4)) {
1642 sv_setpv(linestr, "");
1643 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1644 bufend = SvPVX(linestr) + SvCUR(linestr);
1649 } while (doextract);
1650 oldoldbufptr = oldbufptr = bufptr = linestart = s;
1651 if (PERLDB_LINE && curstash != debstash) {
1652 SV *sv = NEWSV(85,0);
1654 sv_upgrade(sv, SVt_PVMG);
1655 sv_setsv(sv,linestr);
1656 av_store(GvAV(curcop->cop_filegv),(I32)curcop->cop_line,sv);
1658 bufend = SvPVX(linestr) + SvCUR(linestr);
1659 if (curcop->cop_line == 1) {
1660 while (s < bufend && isSPACE(*s))
1662 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
1666 if (*s == '#' && *(s+1) == '!')
1668 #ifdef ALTERNATE_SHEBANG
1670 static char as[] = ALTERNATE_SHEBANG;
1671 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
1672 d = s + (sizeof(as) - 1);
1674 #endif /* ALTERNATE_SHEBANG */
1683 while (*d && !isSPACE(*d))
1687 #ifdef ARG_ZERO_IS_SCRIPT
1688 if (ipathend > ipath) {
1690 * HP-UX (at least) sets argv[0] to the script name,
1691 * which makes $^X incorrect. And Digital UNIX and Linux,
1692 * at least, set argv[0] to the basename of the Perl
1693 * interpreter. So, having found "#!", we'll set it right.
1695 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
1696 assert(SvPOK(x) || SvGMAGICAL(x));
1697 if (sv_eq(x, GvSV(curcop->cop_filegv))) {
1698 sv_setpvn(x, ipath, ipathend - ipath);
1701 TAINT_NOT; /* $^X is always tainted, but that's OK */
1703 #endif /* ARG_ZERO_IS_SCRIPT */
1708 d = instr(s,"perl -");
1710 d = instr(s,"perl");
1711 #ifdef ALTERNATE_SHEBANG
1713 * If the ALTERNATE_SHEBANG on this system starts with a
1714 * character that can be part of a Perl expression, then if
1715 * we see it but not "perl", we're probably looking at the
1716 * start of Perl code, not a request to hand off to some
1717 * other interpreter. Similarly, if "perl" is there, but
1718 * not in the first 'word' of the line, we assume the line
1719 * contains the start of the Perl program.
1721 if (d && *s != '#') {
1723 while (*c && !strchr("; \t\r\n\f\v#", *c))
1726 d = Nullch; /* "perl" not in first word; ignore */
1728 *s = '#'; /* Don't try to parse shebang line */
1730 #endif /* ALTERNATE_SHEBANG */
1735 !instr(s,"indir") &&
1736 instr(origargv[0],"perl"))
1742 while (s < bufend && isSPACE(*s))
1745 Newz(899,newargv,origargc+3,char*);
1747 while (s < bufend && !isSPACE(*s))
1750 Copy(origargv+1, newargv+2, origargc+1, char*);
1755 execv(ipath, newargv);
1756 croak("Can't exec %s", ipath);
1759 U32 oldpdb = perldb;
1760 bool oldn = minus_n;
1761 bool oldp = minus_p;
1763 while (*d && !isSPACE(*d)) d++;
1764 while (*d == ' ' || *d == '\t') d++;
1768 if (*d == 'M' || *d == 'm') {
1770 while (*d && !isSPACE(*d)) d++;
1771 croak("Too late for \"-%.*s\" option",
1774 d = moreswitches(d);
1776 if (PERLDB_LINE && !oldpdb ||
1777 ( minus_n || minus_p ) && !(oldn || oldp) )
1778 /* if we have already added "LINE: while (<>) {",
1779 we must not do it again */
1781 sv_setpv(linestr, "");
1782 oldoldbufptr = oldbufptr = s = linestart = SvPVX(linestr);
1783 bufend = SvPVX(linestr) + SvCUR(linestr);
1786 (void)gv_fetchfile(origfilename);
1793 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1795 lex_state = LEX_FORMLINE;
1801 warn("Illegal character \\%03o (carriage return)", '\r');
1803 "(Maybe you didn't strip carriage returns after a network transfer?)\n");
1805 case ' ': case '\t': case '\f': case 013:
1810 if (lex_state != LEX_NORMAL || (in_eval && !rsfp)) {
1812 while (s < d && *s != '\n')
1817 if (lex_formbrack && lex_brackets <= lex_formbrack) {
1819 lex_state = LEX_FORMLINE;
1829 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
1834 while (s < bufend && (*s == ' ' || *s == '\t'))
1837 if (strnEQ(s,"=>",2)) {
1839 warn("Ambiguous use of -%c => resolved to \"-%c\" =>",
1840 (int)tmp, (int)tmp);
1841 s = force_word(bufptr,WORD,FALSE,FALSE,FALSE);
1842 OPERATOR('-'); /* unary minus */
1844 last_uni = oldbufptr;
1845 last_lop_op = OP_FTEREAD; /* good enough */
1847 case 'r': FTST(OP_FTEREAD);
1848 case 'w': FTST(OP_FTEWRITE);
1849 case 'x': FTST(OP_FTEEXEC);
1850 case 'o': FTST(OP_FTEOWNED);
1851 case 'R': FTST(OP_FTRREAD);
1852 case 'W': FTST(OP_FTRWRITE);
1853 case 'X': FTST(OP_FTREXEC);
1854 case 'O': FTST(OP_FTROWNED);
1855 case 'e': FTST(OP_FTIS);
1856 case 'z': FTST(OP_FTZERO);
1857 case 's': FTST(OP_FTSIZE);
1858 case 'f': FTST(OP_FTFILE);
1859 case 'd': FTST(OP_FTDIR);
1860 case 'l': FTST(OP_FTLINK);
1861 case 'p': FTST(OP_FTPIPE);
1862 case 'S': FTST(OP_FTSOCK);
1863 case 'u': FTST(OP_FTSUID);
1864 case 'g': FTST(OP_FTSGID);
1865 case 'k': FTST(OP_FTSVTX);
1866 case 'b': FTST(OP_FTBLK);
1867 case 'c': FTST(OP_FTCHR);
1868 case 't': FTST(OP_FTTTY);
1869 case 'T': FTST(OP_FTTEXT);
1870 case 'B': FTST(OP_FTBINARY);
1871 case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
1872 case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
1873 case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
1875 croak("Unrecognized file test: -%c", (int)tmp);
1882 if (expect == XOPERATOR)
1887 else if (*s == '>') {
1890 if (isIDFIRST(*s)) {
1891 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
1899 if (expect == XOPERATOR)
1902 if (isSPACE(*s) || !isSPACE(*bufptr))
1904 OPERATOR('-'); /* unary minus */
1911 if (expect == XOPERATOR)
1916 if (expect == XOPERATOR)
1919 if (isSPACE(*s) || !isSPACE(*bufptr))
1925 if (expect != XOPERATOR) {
1926 s = scan_ident(s, bufend, tokenbuf, sizeof tokenbuf, TRUE);
1928 force_ident(tokenbuf, '*');
1941 if (expect == XOPERATOR) {
1946 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, TRUE);
1949 yyerror("Final % should be \\% or %name");
1952 pending_ident = '%';
1974 if (last_lop == oldoldbufptr || last_uni == oldoldbufptr)
1975 oldbufptr = oldoldbufptr; /* allow print(STDOUT 123) */
1980 if (curcop->cop_line < copline)
1981 copline = curcop->cop_line;
1992 if (lex_brackets <= 0)
1993 yyerror("Unmatched right bracket");
1996 if (lex_state == LEX_INTERPNORMAL) {
1997 if (lex_brackets == 0) {
1998 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
1999 lex_state = LEX_INTERPEND;
2006 if (lex_brackets > 100) {
2007 char* newlb = Renew(lex_brackstack, lex_brackets + 1, char);
2008 if (newlb != lex_brackstack) {
2010 lex_brackstack = newlb;
2015 if (lex_formbrack) {
2019 if (oldoldbufptr == last_lop)
2020 lex_brackstack[lex_brackets++] = XTERM;
2022 lex_brackstack[lex_brackets++] = XOPERATOR;
2023 OPERATOR(HASHBRACK);
2025 while (s < bufend && (*s == ' ' || *s == '\t'))
2029 if (d < bufend && *d == '-') {
2032 while (d < bufend && (*d == ' ' || *d == '\t'))
2035 if (d < bufend && isIDFIRST(*d)) {
2036 d = scan_word(d, tokenbuf + 1, sizeof tokenbuf - 1,
2038 while (d < bufend && (*d == ' ' || *d == '\t'))
2041 char minus = (tokenbuf[0] == '-');
2043 (keyword(tokenbuf + 1, len) ||
2044 (minus && len == 1 && isALPHA(tokenbuf[1])) ||
2045 perl_get_cv(tokenbuf + 1, FALSE) ))
2046 warn("Ambiguous use of {%s} resolved to {\"%s\"}",
2047 tokenbuf + !minus, tokenbuf + !minus);
2048 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
2055 lex_brackstack[lex_brackets++] = XSTATE;
2059 lex_brackstack[lex_brackets++] = XOPERATOR;
2064 if (oldoldbufptr == last_lop)
2065 lex_brackstack[lex_brackets++] = XTERM;
2067 lex_brackstack[lex_brackets++] = XOPERATOR;
2070 if (expect == XSTATE) {
2071 lex_brackstack[lex_brackets-1] = XSTATE;
2074 OPERATOR(HASHBRACK);
2076 /* This hack serves to disambiguate a pair of curlies
2077 * as being a block or an anon hash. Normally, expectation
2078 * determines that, but in cases where we're not in a
2079 * position to expect anything in particular (like inside
2080 * eval"") we have to resolve the ambiguity. This code
2081 * covers the case where the first term in the curlies is a
2082 * quoted string. Most other cases need to be explicitly
2083 * disambiguated by prepending a `+' before the opening
2084 * curly in order to force resolution as an anon hash.
2086 * XXX should probably propagate the outer expectation
2087 * into eval"" to rely less on this hack, but that could
2088 * potentially break current behavior of eval"".
2092 if (*s == '\'' || *s == '"' || *s == '`') {
2093 /* common case: get past first string, handling escapes */
2094 for (t++; t < bufend && *t != *s;)
2095 if (*t++ == '\\' && (*t == '\\' || *t == *s))
2099 else if (*s == 'q') {
2102 || ((*t == 'q' || *t == 'x') && ++t < bufend
2103 && !isALNUM(*t)))) {
2105 char open, close, term;
2108 while (t < bufend && isSPACE(*t))
2112 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
2116 for (t++; t < bufend; t++) {
2117 if (*t == '\\' && t+1 < bufend && open != '\\')
2119 else if (*t == open)
2123 for (t++; t < bufend; t++) {
2124 if (*t == '\\' && t+1 < bufend)
2126 else if (*t == close && --brackets <= 0)
2128 else if (*t == open)
2134 else if (isALPHA(*s)) {
2135 for (t++; t < bufend && isALNUM(*t); t++) ;
2137 while (t < bufend && isSPACE(*t))
2139 /* if comma follows first term, call it an anon hash */
2140 /* XXX it could be a comma expression with loop modifiers */
2141 if (t < bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
2142 || (*t == '=' && t[1] == '>')))
2143 OPERATOR(HASHBRACK);
2147 lex_brackstack[lex_brackets-1] = XSTATE;
2153 yylval.ival = curcop->cop_line;
2154 if (isSPACE(*s) || *s == '#')
2155 copline = NOLINE; /* invalidate current command line number */
2160 if (lex_brackets <= 0)
2161 yyerror("Unmatched right bracket");
2163 expect = (expectation)lex_brackstack[--lex_brackets];
2164 if (lex_brackets < lex_formbrack)
2166 if (lex_state == LEX_INTERPNORMAL) {
2167 if (lex_brackets == 0) {
2168 if (lex_fakebrack) {
2169 lex_state = LEX_INTERPEND;
2171 return yylex(); /* ignore fake brackets */
2173 if (*s == '-' && s[1] == '>')
2174 lex_state = LEX_INTERPENDMAYBE;
2175 else if (*s != '[' && *s != '{')
2176 lex_state = LEX_INTERPEND;
2179 if (lex_brackets < lex_fakebrack) {
2182 return yylex(); /* ignore fake brackets */
2192 if (expect == XOPERATOR) {
2193 if (dowarn && isALPHA(*s) && bufptr == linestart) {
2201 s = scan_ident(s - 1, bufend, tokenbuf, sizeof tokenbuf, TRUE);
2204 force_ident(tokenbuf, '&');
2208 yylval.ival = (OPpENTERSUB_AMPER<<8);
2227 if (dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
2228 warn("Reversed %c= operator",(int)tmp);
2230 if (expect == XSTATE && isALPHA(tmp) &&
2231 (s == linestart+1 || s[-2] == '\n') )
2233 if (in_eval && !rsfp) {
2238 if (strnEQ(s,"=cut",4)) {
2255 if (lex_brackets < lex_formbrack) {
2257 for (t = s; *t == ' ' || *t == '\t'; t++) ;
2258 if (*t == '\n' || *t == '#') {
2276 if (expect != XOPERATOR) {
2277 if (s[1] != '<' && !strchr(s,'>'))
2280 s = scan_heredoc(s);
2282 s = scan_inputsymbol(s);
2283 TERM(sublex_start());
2288 SHop(OP_LEFT_SHIFT);
2302 SHop(OP_RIGHT_SHIFT);
2311 if (expect == XOPERATOR) {
2312 if (lex_formbrack && lex_brackets == lex_formbrack) {
2315 return ','; /* grandfather non-comma-format format */
2319 if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
2320 if (expect == XOPERATOR)
2321 no_op("Array length", bufptr);
2323 s = scan_ident(s + 1, bufend, tokenbuf + 1, sizeof tokenbuf - 1,
2328 pending_ident = '#';
2332 if (expect == XOPERATOR)
2333 no_op("Scalar", bufptr);
2335 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2338 yyerror("Final $ should be \\$ or $name");
2342 /* This kludge not intended to be bulletproof. */
2343 if (tokenbuf[1] == '[' && !tokenbuf[2]) {
2344 yylval.opval = newSVOP(OP_CONST, 0,
2345 newSViv((IV)compiling.cop_arybase));
2346 yylval.opval->op_private = OPpCONST_ARYBASE;
2351 if (lex_state == LEX_NORMAL)
2354 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2360 isSPACE(*t) || isALNUM(*t) || *t == '$';
2363 bufptr = skipspace(bufptr);
2364 while (t < bufend && *t != ']')
2366 warn("Multidimensional syntax %.*s not supported",
2367 (t - bufptr) + 1, bufptr);
2371 else if (*s == '{') {
2373 if (dowarn && strEQ(tokenbuf+1, "SIG") &&
2374 (t = strchr(s, '}')) && (t = strchr(t, '=')))
2376 char tmpbuf[sizeof tokenbuf];
2378 for (t++; isSPACE(*t); t++) ;
2379 if (isIDFIRST(*t)) {
2380 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
2381 if (*t != '(' && perl_get_cv(tmpbuf, FALSE))
2382 warn("You need to quote \"%s\"", tmpbuf);
2389 if (lex_state == LEX_NORMAL && isSPACE(*d)) {
2390 bool islop = (last_lop == oldoldbufptr);
2391 if (!islop || last_lop_op == OP_GREPSTART)
2393 else if (strchr("$@\"'`q", *s))
2394 expect = XTERM; /* e.g. print $fh "foo" */
2395 else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
2396 expect = XTERM; /* e.g. print $fh &sub */
2397 else if (isIDFIRST(*s)) {
2398 char tmpbuf[sizeof tokenbuf];
2399 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
2400 if (tmp = keyword(tmpbuf, len)) {
2401 /* binary operators exclude handle interpretations */
2413 expect = XTERM; /* e.g. print $fh length() */
2418 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
2419 if (gv && GvCVu(gv))
2420 expect = XTERM; /* e.g. print $fh subr() */
2423 else if (isDIGIT(*s))
2424 expect = XTERM; /* e.g. print $fh 3 */
2425 else if (*s == '.' && isDIGIT(s[1]))
2426 expect = XTERM; /* e.g. print $fh .3 */
2427 else if (strchr("/?-+", *s) && !isSPACE(s[1]))
2428 expect = XTERM; /* e.g. print $fh -1 */
2429 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]))
2430 expect = XTERM; /* print $fh <<"EOF" */
2432 pending_ident = '$';
2436 if (expect == XOPERATOR)
2439 s = scan_ident(s, bufend, tokenbuf + 1, sizeof tokenbuf - 1, FALSE);
2442 yyerror("Final @ should be \\@ or @name");
2445 if (lex_state == LEX_NORMAL)
2447 if ((expect != XREF || oldoldbufptr == last_lop) && intuit_more(s)) {
2451 /* Warn about @ where they meant $. */
2453 if (*s == '[' || *s == '{') {
2455 while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
2457 if (*t == '}' || *t == ']') {
2459 bufptr = skipspace(bufptr);
2460 warn("Scalar value %.*s better written as $%.*s",
2461 t-bufptr, bufptr, t-bufptr-1, bufptr+1);
2466 pending_ident = '@';
2469 case '/': /* may either be division or pattern */
2470 case '?': /* may either be conditional or pattern */
2471 if (expect != XOPERATOR) {
2472 /* Disable warning on "study /blah/" */
2473 if (oldoldbufptr == last_uni
2474 && (*last_uni != 's' || s - last_uni < 5
2475 || memNE(last_uni, "study", 5) || isALNUM(last_uni[5])))
2478 TERM(sublex_start());
2486 if (lex_formbrack && lex_brackets == lex_formbrack && s[1] == '\n' &&
2487 (s == linestart || s[-1] == '\n') ) {
2492 if (expect == XOPERATOR || !isDIGIT(s[1])) {
2498 yylval.ival = OPf_SPECIAL;
2504 if (expect != XOPERATOR)
2509 case '0': case '1': case '2': case '3': case '4':
2510 case '5': case '6': case '7': case '8': case '9':
2512 if (expect == XOPERATOR)
2518 if (expect == XOPERATOR) {
2519 if (lex_formbrack && lex_brackets == lex_formbrack) {
2522 return ','; /* grandfather non-comma-format format */
2528 missingterm((char*)0);
2529 yylval.ival = OP_CONST;
2530 TERM(sublex_start());
2534 if (expect == XOPERATOR) {
2535 if (lex_formbrack && lex_brackets == lex_formbrack) {
2538 return ','; /* grandfather non-comma-format format */
2544 missingterm((char*)0);
2545 yylval.ival = OP_CONST;
2546 for (d = SvPV(lex_stuff, len); len; len--, d++) {
2547 if (*d == '$' || *d == '@' || *d == '\\') {
2548 yylval.ival = OP_STRINGIFY;
2552 TERM(sublex_start());
2556 if (expect == XOPERATOR)
2557 no_op("Backticks",s);
2559 missingterm((char*)0);
2560 yylval.ival = OP_BACKTICK;
2562 TERM(sublex_start());
2566 if (dowarn && lex_inwhat && isDIGIT(*s))
2567 warn("Can't use \\%c to mean $%c in expression", *s, *s);
2568 if (expect == XOPERATOR)
2569 no_op("Backslash",s);
2573 if (isDIGIT(s[1]) && expect == XOPERATOR) {
2612 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2614 /* Some keywords can be followed by any delimiter, including ':' */
2615 tmp = (len == 1 && strchr("msyq", tokenbuf[0]) ||
2616 len == 2 && ((tokenbuf[0] == 't' && tokenbuf[1] == 'r') ||
2617 (tokenbuf[0] == 'q' &&
2618 strchr("qwx", tokenbuf[1]))));
2620 /* x::* is just a word, unless x is "CORE" */
2621 if (!tmp && *s == ':' && s[1] == ':' && strNE(tokenbuf, "CORE"))
2625 while (d < bufend && isSPACE(*d))
2626 d++; /* no comments skipped here, or s### is misparsed */
2628 /* Is this a label? */
2629 if (!tmp && expect == XSTATE
2630 && d < bufend && *d == ':' && *(d + 1) != ':') {
2632 yylval.pval = savepv(tokenbuf);
2637 /* Check for keywords */
2638 tmp = keyword(tokenbuf, len);
2640 /* Is this a word before a => operator? */
2641 if (strnEQ(d,"=>",2)) {
2643 if (dowarn && (tmp || perl_get_cv(tokenbuf, FALSE)))
2644 warn("Ambiguous use of %s => resolved to \"%s\" =>",
2645 tokenbuf, tokenbuf);
2646 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(tokenbuf,0));
2647 yylval.opval->op_private = OPpCONST_BARE;
2651 if (tmp < 0) { /* second-class keyword? */
2652 if (expect != XOPERATOR && (*s != ':' || s[1] != ':') &&
2653 (((gv = gv_fetchpv(tokenbuf, FALSE, SVt_PVCV)) &&
2654 GvCVu(gv) && GvIMPORTED_CV(gv)) ||
2655 ((gvp = (GV**)hv_fetch(globalstash,tokenbuf,len,FALSE)) &&
2656 (gv = *gvp) != (GV*)&sv_undef &&
2657 GvCVu(gv) && GvIMPORTED_CV(gv))))
2659 tmp = 0; /* overridden by importation */
2662 && -tmp==KEY_lock /* XXX generalizable kludge */
2663 && !hv_fetch(GvHVn(incgv), "Thread.pm", 9, FALSE))
2665 tmp = 0; /* any sub overrides "weak" keyword */
2668 tmp = -tmp; gv = Nullgv; gvp = 0;
2675 default: /* not a keyword */
2678 char lastchar = (bufptr == oldoldbufptr ? 0 : bufptr[-1]);
2680 /* Get the rest if it looks like a package qualifier */
2682 if (*s == '\'' || *s == ':' && s[1] == ':') {
2683 s = scan_word(s, tokenbuf + len, sizeof tokenbuf - len,
2686 croak("Bad name after %s::", tokenbuf);
2689 if (expect == XOPERATOR) {
2690 if (bufptr == linestart) {
2696 no_op("Bareword",s);
2699 /* Look for a subroutine with this name in current package. */
2702 sv = newSVpv("CORE::GLOBAL::",14);
2703 sv_catpv(sv,tokenbuf);
2706 sv = newSVpv(tokenbuf,0);
2708 gv = gv_fetchpv(tokenbuf,FALSE, SVt_PVCV);
2710 /* Presume this is going to be a bareword of some sort. */
2713 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
2714 yylval.opval->op_private = OPpCONST_BARE;
2716 /* See if it's the indirect object for a list operator. */
2719 oldoldbufptr < bufptr &&
2720 (oldoldbufptr == last_lop || oldoldbufptr == last_uni) &&
2721 /* NO SKIPSPACE BEFORE HERE! */
2723 ((opargs[last_lop_op] >> OASHIFT)& 7) == OA_FILEREF) )
2725 bool immediate_paren = *s == '(';
2727 /* (Now we can afford to cross potential line boundary.) */
2730 /* Two barewords in a row may indicate method call. */
2732 if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
2735 /* If not a declared subroutine, it's an indirect object. */
2736 /* (But it's an indir obj regardless for sort.) */
2738 if ((last_lop_op == OP_SORT ||
2739 (!immediate_paren && (!gv || !GvCVu(gv))) ) &&
2740 (last_lop_op != OP_MAPSTART && last_lop_op != OP_GREPSTART)){
2741 expect = (last_lop == oldoldbufptr) ? XTERM : XOPERATOR;
2746 /* If followed by a paren, it's certainly a subroutine. */
2752 if (gv && GvCVu(gv)) {
2753 for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
2754 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
2759 nextval[nexttoke].opval = yylval.opval;
2766 /* If followed by var or block, call it a method (unless sub) */
2768 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
2769 last_lop = oldbufptr;
2770 last_lop_op = OP_METHOD;
2774 /* If followed by a bareword, see if it looks like indir obj. */
2776 if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
2779 /* Not a method, so call it a subroutine (if defined) */
2781 if (gv && GvCVu(gv)) {
2783 if (lastchar == '-')
2784 warn("Ambiguous use of -%s resolved as -&%s()",
2785 tokenbuf, tokenbuf);
2786 last_lop = oldbufptr;
2787 last_lop_op = OP_ENTERSUB;
2788 /* Check for a constant sub */
2790 if ((sv = cv_const_sv(cv))) {
2792 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
2793 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
2794 yylval.opval->op_private = 0;
2798 /* Resolve to GV now. */
2799 op_free(yylval.opval);
2800 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
2801 /* Is there a prototype? */
2804 char *proto = SvPV((SV*)cv, len);
2807 if (strEQ(proto, "$"))
2809 if (*proto == '&' && *s == '{') {
2810 sv_setpv(subname,"__ANON__");
2814 nextval[nexttoke].opval = yylval.opval;
2820 if (hints & HINT_STRICT_SUBS &&
2823 last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
2824 last_lop_op != OP_ACCEPT &&
2825 last_lop_op != OP_PIPE_OP &&
2826 last_lop_op != OP_SOCKPAIR)
2829 "Bareword \"%s\" not allowed while \"strict subs\" in use",
2834 /* Call it a bare word */
2838 if (lastchar != '-') {
2839 for (d = tokenbuf; *d && isLOWER(*d); d++) ;
2841 warn(warn_reserved, tokenbuf);
2844 if (lastchar && strchr("*%&", lastchar)) {
2845 warn("Operator or semicolon missing before %c%s",
2846 lastchar, tokenbuf);
2847 warn("Ambiguous use of %c resolved as operator %c",
2848 lastchar, lastchar);
2854 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2855 newSVsv(GvSV(curcop->cop_filegv)));
2859 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2860 newSVpvf("%ld", (long)curcop->cop_line));
2863 case KEY___PACKAGE__:
2864 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
2866 ? newSVsv(curstname)
2875 if (rsfp && (!in_eval || tokenbuf[2] == 'D')) {
2876 char *pname = "main";
2877 if (tokenbuf[2] == 'D')
2878 pname = HvNAME(curstash ? curstash : defstash);
2879 gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
2882 GvIOp(gv) = newIO();
2883 IoIFP(GvIOp(gv)) = rsfp;
2884 #if defined(HAS_FCNTL) && defined(F_SETFD)
2886 int fd = PerlIO_fileno(rsfp);
2887 fcntl(fd,F_SETFD,fd >= 3);
2890 /* Mark this internal pseudo-handle as clean */
2891 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
2893 IoTYPE(GvIOp(gv)) = '|';
2894 else if ((PerlIO*)rsfp == PerlIO_stdin())
2895 IoTYPE(GvIOp(gv)) = '-';
2897 IoTYPE(GvIOp(gv)) = '<';
2908 if (expect == XSTATE) {
2915 if (*s == ':' && s[1] == ':') {
2918 s = scan_word(s, tokenbuf, sizeof tokenbuf, FALSE, &len);
2919 tmp = keyword(tokenbuf, len);
2933 LOP(OP_ACCEPT,XTERM);
2939 LOP(OP_ATAN2,XTERM);
2948 LOP(OP_BLESS,XTERM);
2957 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
2977 LOP(OP_CRYPT,XTERM);
2981 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
2982 if (*d != '0' && isDIGIT(*d))
2983 yywarn("chmod: mode argument is missing initial 0");
2985 LOP(OP_CHMOD,XTERM);
2988 LOP(OP_CHOWN,XTERM);
2991 LOP(OP_CONNECT,XTERM);
3007 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3011 hints |= HINT_BLOCK_SCOPE;
3021 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
3022 LOP(OP_DBMOPEN,XTERM);
3028 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3035 yylval.ival = curcop->cop_line;
3049 expect = (*s == '{') ? XTERMBLOCK : XTERM;
3050 UNIBRACK(OP_ENTEREVAL);
3065 case KEY_endhostent:
3071 case KEY_endservent:
3074 case KEY_endprotoent:
3085 yylval.ival = curcop->cop_line;
3087 if (isIDFIRST(*s)) {
3089 if ((bufend - p) >= 3 &&
3090 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
3094 croak("Missing $ on loop variable");
3099 LOP(OP_FORMLINE,XTERM);
3105 LOP(OP_FCNTL,XTERM);
3111 LOP(OP_FLOCK,XTERM);
3120 LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
3123 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3138 case KEY_getpriority:
3139 LOP(OP_GETPRIORITY,XTERM);
3141 case KEY_getprotobyname:
3144 case KEY_getprotobynumber:
3145 LOP(OP_GPBYNUMBER,XTERM);
3147 case KEY_getprotoent:
3159 case KEY_getpeername:
3160 UNI(OP_GETPEERNAME);
3162 case KEY_gethostbyname:
3165 case KEY_gethostbyaddr:
3166 LOP(OP_GHBYADDR,XTERM);
3168 case KEY_gethostent:
3171 case KEY_getnetbyname:
3174 case KEY_getnetbyaddr:
3175 LOP(OP_GNBYADDR,XTERM);
3180 case KEY_getservbyname:
3181 LOP(OP_GSBYNAME,XTERM);
3183 case KEY_getservbyport:
3184 LOP(OP_GSBYPORT,XTERM);
3186 case KEY_getservent:
3189 case KEY_getsockname:
3190 UNI(OP_GETSOCKNAME);
3192 case KEY_getsockopt:
3193 LOP(OP_GSOCKOPT,XTERM);
3215 yylval.ival = curcop->cop_line;
3219 LOP(OP_INDEX,XTERM);
3225 LOP(OP_IOCTL,XTERM);
3237 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3268 LOP(OP_LISTEN,XTERM);
3278 TERM(sublex_start());
3281 LOP(OP_MAPSTART,XREF);
3284 LOP(OP_MKDIR,XTERM);
3287 LOP(OP_MSGCTL,XTERM);
3290 LOP(OP_MSGGET,XTERM);
3293 LOP(OP_MSGRCV,XTERM);
3296 LOP(OP_MSGSND,XTERM);
3301 if (isIDFIRST(*s)) {
3302 s = scan_word(s, tokenbuf, sizeof tokenbuf, TRUE, &len);
3303 in_my_stash = gv_stashpv(tokenbuf, FALSE);
3307 sprintf(tmpbuf, "No such class %.1000s", tokenbuf);
3314 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3321 if (expect != XSTATE)
3322 yyerror("\"no\" not allowed in expression");
3323 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3324 s = force_version(s);
3333 if (isIDFIRST(*s)) {
3335 for (d = s; isALNUM(*d); d++) ;
3337 if (strchr("|&*+-=!?:.", *t))
3338 warn("Precedence problem: open %.*s should be open(%.*s)",
3344 yylval.ival = OP_OR;
3354 LOP(OP_OPEN_DIR,XTERM);
3357 checkcomma(s,tokenbuf,"filehandle");
3361 checkcomma(s,tokenbuf,"filehandle");
3380 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3384 LOP(OP_PIPE_OP,XTERM);
3389 missingterm((char*)0);
3390 yylval.ival = OP_CONST;
3391 TERM(sublex_start());
3399 missingterm((char*)0);
3400 if (dowarn && SvLEN(lex_stuff)) {
3401 d = SvPV_force(lex_stuff, len);
3402 for (; len; --len, ++d) {
3404 warn("Possible attempt to separate words with commas");
3408 warn("Possible attempt to put comments in qw() list");
3414 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, tokeq(lex_stuff));
3418 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
3421 yylval.ival = OP_SPLIT;
3425 last_lop = oldbufptr;
3426 last_lop_op = OP_SPLIT;
3432 missingterm((char*)0);
3433 yylval.ival = OP_STRINGIFY;
3434 if (SvIVX(lex_stuff) == '\'')
3435 SvIVX(lex_stuff) = 0; /* qq'$foo' should intepolate */
3436 TERM(sublex_start());
3441 missingterm((char*)0);
3442 yylval.ival = OP_BACKTICK;
3444 TERM(sublex_start());
3451 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3452 if (isIDFIRST(*tokenbuf))
3453 gv_stashpvn(tokenbuf, strlen(tokenbuf), TRUE);
3455 yyerror("<> should be quotes");
3462 s = force_word(s,WORD,TRUE,FALSE,FALSE);
3466 LOP(OP_RENAME,XTERM);
3475 LOP(OP_RINDEX,XTERM);
3498 LOP(OP_REVERSE,XTERM);
3509 TERM(sublex_start());
3511 TOKEN(1); /* force error */
3520 LOP(OP_SELECT,XTERM);
3526 LOP(OP_SEMCTL,XTERM);
3529 LOP(OP_SEMGET,XTERM);
3532 LOP(OP_SEMOP,XTERM);
3538 LOP(OP_SETPGRP,XTERM);
3540 case KEY_setpriority:
3541 LOP(OP_SETPRIORITY,XTERM);
3543 case KEY_sethostent:
3549 case KEY_setservent:
3552 case KEY_setprotoent:
3562 LOP(OP_SEEKDIR,XTERM);
3564 case KEY_setsockopt:
3565 LOP(OP_SSOCKOPT,XTERM);
3571 LOP(OP_SHMCTL,XTERM);
3574 LOP(OP_SHMGET,XTERM);
3577 LOP(OP_SHMREAD,XTERM);
3580 LOP(OP_SHMWRITE,XTERM);
3583 LOP(OP_SHUTDOWN,XTERM);
3592 LOP(OP_SOCKET,XTERM);
3594 case KEY_socketpair:
3595 LOP(OP_SOCKPAIR,XTERM);
3598 checkcomma(s,tokenbuf,"subroutine name");
3600 if (*s == ';' || *s == ')') /* probably a close */
3601 croak("sort is now a reserved word");
3603 s = force_word(s,WORD,TRUE,TRUE,FALSE);
3607 LOP(OP_SPLIT,XTERM);
3610 LOP(OP_SPRINTF,XTERM);
3613 LOP(OP_SPLICE,XTERM);
3629 LOP(OP_SUBSTR,XTERM);
3636 if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
3637 char tmpbuf[sizeof tokenbuf];
3639 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
3640 if (strchr(tmpbuf, ':'))
3641 sv_setpv(subname, tmpbuf);
3643 sv_setsv(subname,curstname);
3644 sv_catpvn(subname,"::",2);
3645 sv_catpvn(subname,tmpbuf,len);
3647 s = force_word(s,WORD,FALSE,TRUE,TRUE);
3651 expect = XTERMBLOCK;
3652 sv_setpv(subname,"?");
3655 if (tmp == KEY_format) {
3658 lex_formbrack = lex_brackets + 1;
3662 /* Look for a prototype */
3669 SvREFCNT_dec(lex_stuff);
3671 croak("Prototype not terminated");
3674 d = SvPVX(lex_stuff);
3676 for (p = d; *p; ++p) {
3681 SvCUR(lex_stuff) = tmp;
3684 nextval[1] = nextval[0];
3685 nexttype[1] = nexttype[0];
3686 nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, lex_stuff);
3687 nexttype[0] = THING;
3688 if (nexttoke == 1) {
3689 lex_defer = lex_state;
3690 lex_expect = expect;
3691 lex_state = LEX_KNOWNEXT;
3696 if (*SvPV(subname,na) == '?') {
3697 sv_setpv(subname,"__ANON__");
3704 LOP(OP_SYSTEM,XREF);
3707 LOP(OP_SYMLINK,XTERM);
3710 LOP(OP_SYSCALL,XTERM);
3713 LOP(OP_SYSOPEN,XTERM);
3716 LOP(OP_SYSSEEK,XTERM);
3719 LOP(OP_SYSREAD,XTERM);
3722 LOP(OP_SYSWRITE,XTERM);
3726 TERM(sublex_start());
3747 LOP(OP_TRUNCATE,XTERM);
3759 yylval.ival = curcop->cop_line;
3763 yylval.ival = curcop->cop_line;
3767 LOP(OP_UNLINK,XTERM);
3773 LOP(OP_UNPACK,XTERM);
3776 LOP(OP_UTIME,XTERM);
3780 for (d = s; d < bufend && (isSPACE(*d) || *d == '('); d++) ;
3781 if (*d != '0' && isDIGIT(*d))
3782 yywarn("umask: argument is missing initial 0");
3787 LOP(OP_UNSHIFT,XTERM);
3790 if (expect != XSTATE)
3791 yyerror("\"use\" not allowed in expression");
3794 s = force_version(s);
3795 if(*s == ';' || (s = skipspace(s), *s == ';')) {
3796 nextval[nexttoke].opval = Nullop;
3801 s = force_word(s,WORD,FALSE,TRUE,FALSE);
3802 s = force_version(s);
3815 yylval.ival = curcop->cop_line;
3819 hints |= HINT_BLOCK_SCOPE;
3826 LOP(OP_WAITPID,XTERM);
3832 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
3836 if (expect == XOPERATOR)
3842 yylval.ival = OP_XOR;
3847 TERM(sublex_start());
3853 keyword(register char *d, I32 len)
3858 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
3859 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
3860 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
3861 if (strEQ(d,"__DATA__")) return KEY___DATA__;
3862 if (strEQ(d,"__END__")) return KEY___END__;
3866 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
3871 if (strEQ(d,"and")) return -KEY_and;
3872 if (strEQ(d,"abs")) return -KEY_abs;
3875 if (strEQ(d,"alarm")) return -KEY_alarm;
3876 if (strEQ(d,"atan2")) return -KEY_atan2;
3879 if (strEQ(d,"accept")) return -KEY_accept;
3884 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
3887 if (strEQ(d,"bless")) return -KEY_bless;
3888 if (strEQ(d,"bind")) return -KEY_bind;
3889 if (strEQ(d,"binmode")) return -KEY_binmode;
3892 if (strEQ(d,"CORE")) return -KEY_CORE;
3897 if (strEQ(d,"cmp")) return -KEY_cmp;
3898 if (strEQ(d,"chr")) return -KEY_chr;
3899 if (strEQ(d,"cos")) return -KEY_cos;
3902 if (strEQ(d,"chop")) return KEY_chop;
3905 if (strEQ(d,"close")) return -KEY_close;
3906 if (strEQ(d,"chdir")) return -KEY_chdir;
3907 if (strEQ(d,"chomp")) return KEY_chomp;
3908 if (strEQ(d,"chmod")) return -KEY_chmod;
3909 if (strEQ(d,"chown")) return -KEY_chown;
3910 if (strEQ(d,"crypt")) return -KEY_crypt;
3913 if (strEQ(d,"chroot")) return -KEY_chroot;
3914 if (strEQ(d,"caller")) return -KEY_caller;
3917 if (strEQ(d,"connect")) return -KEY_connect;
3920 if (strEQ(d,"closedir")) return -KEY_closedir;
3921 if (strEQ(d,"continue")) return -KEY_continue;
3926 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
3931 if (strEQ(d,"do")) return KEY_do;
3934 if (strEQ(d,"die")) return -KEY_die;
3937 if (strEQ(d,"dump")) return -KEY_dump;
3940 if (strEQ(d,"delete")) return KEY_delete;
3943 if (strEQ(d,"defined")) return KEY_defined;
3944 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
3947 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
3952 if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
3953 if (strEQ(d,"END")) return KEY_END;
3958 if (strEQ(d,"eq")) return -KEY_eq;
3961 if (strEQ(d,"eof")) return -KEY_eof;
3962 if (strEQ(d,"exp")) return -KEY_exp;
3965 if (strEQ(d,"else")) return KEY_else;
3966 if (strEQ(d,"exit")) return -KEY_exit;
3967 if (strEQ(d,"eval")) return KEY_eval;
3968 if (strEQ(d,"exec")) return -KEY_exec;
3969 if (strEQ(d,"each")) return KEY_each;
3972 if (strEQ(d,"elsif")) return KEY_elsif;
3975 if (strEQ(d,"exists")) return KEY_exists;
3976 if (strEQ(d,"elseif")) warn("elseif should be elsif");
3979 if (strEQ(d,"endgrent")) return -KEY_endgrent;
3980 if (strEQ(d,"endpwent")) return -KEY_endpwent;
3983 if (strEQ(d,"endnetent")) return -KEY_endnetent;
3986 if (strEQ(d,"endhostent")) return -KEY_endhostent;
3987 if (strEQ(d,"endservent")) return -KEY_endservent;
3990 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
3997 if (strEQ(d,"for")) return KEY_for;
4000 if (strEQ(d,"fork")) return -KEY_fork;
4003 if (strEQ(d,"fcntl")) return -KEY_fcntl;
4004 if (strEQ(d,"flock")) return -KEY_flock;
4007 if (strEQ(d,"format")) return KEY_format;
4008 if (strEQ(d,"fileno")) return -KEY_fileno;
4011 if (strEQ(d,"foreach")) return KEY_foreach;
4014 if (strEQ(d,"formline")) return -KEY_formline;
4020 if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
4021 if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
4025 if (strnEQ(d,"get",3)) {
4030 if (strEQ(d,"ppid")) return -KEY_getppid;
4031 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
4034 if (strEQ(d,"pwent")) return -KEY_getpwent;
4035 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
4036 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
4039 if (strEQ(d,"peername")) return -KEY_getpeername;
4040 if (strEQ(d,"protoent")) return -KEY_getprotoent;
4041 if (strEQ(d,"priority")) return -KEY_getpriority;
4044 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
4047 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
4051 else if (*d == 'h') {
4052 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
4053 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
4054 if (strEQ(d,"hostent")) return -KEY_gethostent;
4056 else if (*d == 'n') {
4057 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
4058 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
4059 if (strEQ(d,"netent")) return -KEY_getnetent;
4061 else if (*d == 's') {
4062 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
4063 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
4064 if (strEQ(d,"servent")) return -KEY_getservent;
4065 if (strEQ(d,"sockname")) return -KEY_getsockname;
4066 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
4068 else if (*d == 'g') {
4069 if (strEQ(d,"grent")) return -KEY_getgrent;
4070 if (strEQ(d,"grnam")) return -KEY_getgrnam;
4071 if (strEQ(d,"grgid")) return -KEY_getgrgid;
4073 else if (*d == 'l') {
4074 if (strEQ(d,"login")) return -KEY_getlogin;
4076 else if (strEQ(d,"c")) return -KEY_getc;
4081 if (strEQ(d,"gt")) return -KEY_gt;
4082 if (strEQ(d,"ge")) return -KEY_ge;
4085 if (strEQ(d,"grep")) return KEY_grep;
4086 if (strEQ(d,"goto")) return KEY_goto;
4087 if (strEQ(d,"glob")) return KEY_glob;
4090 if (strEQ(d,"gmtime")) return -KEY_gmtime;
4095 if (strEQ(d,"hex")) return -KEY_hex;
4098 if (strEQ(d,"INIT")) return KEY_INIT;
4103 if (strEQ(d,"if")) return KEY_if;
4106 if (strEQ(d,"int")) return -KEY_int;
4109 if (strEQ(d,"index")) return -KEY_index;
4110 if (strEQ(d,"ioctl")) return -KEY_ioctl;
4115 if (strEQ(d,"join")) return -KEY_join;
4119 if (strEQ(d,"keys")) return KEY_keys;
4120 if (strEQ(d,"kill")) return -KEY_kill;
4125 if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
4126 if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
4132 if (strEQ(d,"lt")) return -KEY_lt;
4133 if (strEQ(d,"le")) return -KEY_le;
4134 if (strEQ(d,"lc")) return -KEY_lc;
4137 if (strEQ(d,"log")) return -KEY_log;
4140 if (strEQ(d,"last")) return KEY_last;
4141 if (strEQ(d,"link")) return -KEY_link;
4142 if (strEQ(d,"lock")) return -KEY_lock;
4145 if (strEQ(d,"local")) return KEY_local;
4146 if (strEQ(d,"lstat")) return -KEY_lstat;
4149 if (strEQ(d,"length")) return -KEY_length;
4150 if (strEQ(d,"listen")) return -KEY_listen;
4153 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
4156 if (strEQ(d,"localtime")) return -KEY_localtime;
4162 case 1: return KEY_m;
4164 if (strEQ(d,"my")) return KEY_my;
4167 if (strEQ(d,"map")) return KEY_map;
4170 if (strEQ(d,"mkdir")) return -KEY_mkdir;
4173 if (strEQ(d,"msgctl")) return -KEY_msgctl;
4174 if (strEQ(d,"msgget")) return -KEY_msgget;
4175 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
4176 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
4181 if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
4184 if (strEQ(d,"next")) return KEY_next;
4185 if (strEQ(d,"ne")) return -KEY_ne;
4186 if (strEQ(d,"not")) return -KEY_not;
4187 if (strEQ(d,"no")) return KEY_no;
4192 if (strEQ(d,"or")) return -KEY_or;
4195 if (strEQ(d,"ord")) return -KEY_ord;
4196 if (strEQ(d,"oct")) return -KEY_oct;
4199 if (strEQ(d,"open")) return -KEY_open;
4202 if (strEQ(d,"opendir")) return -KEY_opendir;
4209 if (strEQ(d,"pop")) return KEY_pop;
4210 if (strEQ(d,"pos")) return KEY_pos;
4213 if (strEQ(d,"push")) return KEY_push;
4214 if (strEQ(d,"pack")) return -KEY_pack;
4215 if (strEQ(d,"pipe")) return -KEY_pipe;
4218 if (strEQ(d,"print")) return KEY_print;
4221 if (strEQ(d,"printf")) return KEY_printf;
4224 if (strEQ(d,"package")) return KEY_package;
4227 if (strEQ(d,"prototype")) return KEY_prototype;
4232 if (strEQ(d,"q")) return KEY_q;
4233 if (strEQ(d,"qq")) return KEY_qq;
4234 if (strEQ(d,"qw")) return KEY_qw;
4235 if (strEQ(d,"qx")) return KEY_qx;
4237 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
4242 if (strEQ(d,"ref")) return -KEY_ref;
4245 if (strEQ(d,"read")) return -KEY_read;
4246 if (strEQ(d,"rand")) return -KEY_rand;
4247 if (strEQ(d,"recv")) return -KEY_recv;
4248 if (strEQ(d,"redo")) return KEY_redo;
4251 if (strEQ(d,"rmdir")) return -KEY_rmdir;
4252 if (strEQ(d,"reset")) return -KEY_reset;
4255 if (strEQ(d,"return")) return KEY_return;
4256 if (strEQ(d,"rename")) return -KEY_rename;
4257 if (strEQ(d,"rindex")) return -KEY_rindex;
4260 if (strEQ(d,"require")) return -KEY_require;
4261 if (strEQ(d,"reverse")) return -KEY_reverse;
4262 if (strEQ(d,"readdir")) return -KEY_readdir;
4265 if (strEQ(d,"readlink")) return -KEY_readlink;
4266 if (strEQ(d,"readline")) return -KEY_readline;
4267 if (strEQ(d,"readpipe")) return -KEY_readpipe;
4270 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
4276 case 0: return KEY_s;
4278 if (strEQ(d,"scalar")) return KEY_scalar;
4283 if (strEQ(d,"seek")) return -KEY_seek;
4284 if (strEQ(d,"send")) return -KEY_send;
4287 if (strEQ(d,"semop")) return -KEY_semop;
4290 if (strEQ(d,"select")) return -KEY_select;
4291 if (strEQ(d,"semctl")) return -KEY_semctl;
4292 if (strEQ(d,"semget")) return -KEY_semget;
4295 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
4296 if (strEQ(d,"seekdir")) return -KEY_seekdir;
4299 if (strEQ(d,"setpwent")) return -KEY_setpwent;
4300 if (strEQ(d,"setgrent")) return -KEY_setgrent;
4303 if (strEQ(d,"setnetent")) return -KEY_setnetent;
4306 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
4307 if (strEQ(d,"sethostent")) return -KEY_sethostent;
4308 if (strEQ(d,"setservent")) return -KEY_setservent;
4311 if (strEQ(d,"setpriority")) return -KEY_setpriority;
4312 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
4319 if (strEQ(d,"shift")) return KEY_shift;
4322 if (strEQ(d,"shmctl")) return -KEY_shmctl;
4323 if (strEQ(d,"shmget")) return -KEY_shmget;
4326 if (strEQ(d,"shmread")) return -KEY_shmread;
4329 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
4330 if (strEQ(d,"shutdown")) return -KEY_shutdown;
4335 if (strEQ(d,"sin")) return -KEY_sin;
4338 if (strEQ(d,"sleep")) return -KEY_sleep;
4341 if (strEQ(d,"sort")) return KEY_sort;
4342 if (strEQ(d,"socket")) return -KEY_socket;
4343 if (strEQ(d,"socketpair")) return -KEY_socketpair;
4346 if (strEQ(d,"split")) return KEY_split;
4347 if (strEQ(d,"sprintf")) return -KEY_sprintf;
4348 if (strEQ(d,"splice")) return KEY_splice;
4351 if (strEQ(d,"sqrt")) return -KEY_sqrt;
4354 if (strEQ(d,"srand")) return -KEY_srand;
4357 if (strEQ(d,"stat")) return -KEY_stat;
4358 if (strEQ(d,"study")) return KEY_study;
4361 if (strEQ(d,"substr")) return -KEY_substr;
4362 if (strEQ(d,"sub")) return KEY_sub;
4367 if (strEQ(d,"system")) return -KEY_system;
4370 if (strEQ(d,"symlink")) return -KEY_symlink;
4371 if (strEQ(d,"syscall")) return -KEY_syscall;
4372 if (strEQ(d,"sysopen")) return -KEY_sysopen;
4373 if (strEQ(d,"sysread")) return -KEY_sysread;
4374 if (strEQ(d,"sysseek")) return -KEY_sysseek;
4377 if (strEQ(d,"syswrite")) return -KEY_syswrite;
4386 if (strEQ(d,"tr")) return KEY_tr;
4389 if (strEQ(d,"tie")) return KEY_tie;
4392 if (strEQ(d,"tell")) return -KEY_tell;
4393 if (strEQ(d,"tied")) return KEY_tied;
4394 if (strEQ(d,"time")) return -KEY_time;
4397 if (strEQ(d,"times")) return -KEY_times;
4400 if (strEQ(d,"telldir")) return -KEY_telldir;
4403 if (strEQ(d,"truncate")) return -KEY_truncate;
4410 if (strEQ(d,"uc")) return -KEY_uc;
4413 if (strEQ(d,"use")) return KEY_use;
4416 if (strEQ(d,"undef")) return KEY_undef;
4417 if (strEQ(d,"until")) return KEY_until;
4418 if (strEQ(d,"untie")) return KEY_untie;
4419 if (strEQ(d,"utime")) return -KEY_utime;
4420 if (strEQ(d,"umask")) return -KEY_umask;
4423 if (strEQ(d,"unless")) return KEY_unless;
4424 if (strEQ(d,"unpack")) return -KEY_unpack;
4425 if (strEQ(d,"unlink")) return -KEY_unlink;
4428 if (strEQ(d,"unshift")) return KEY_unshift;
4429 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
4434 if (strEQ(d,"values")) return -KEY_values;
4435 if (strEQ(d,"vec")) return -KEY_vec;
4440 if (strEQ(d,"warn")) return -KEY_warn;
4441 if (strEQ(d,"wait")) return -KEY_wait;
4444 if (strEQ(d,"while")) return KEY_while;
4445 if (strEQ(d,"write")) return -KEY_write;
4448 if (strEQ(d,"waitpid")) return -KEY_waitpid;
4451 if (strEQ(d,"wantarray")) return -KEY_wantarray;
4456 if (len == 1) return -KEY_x;
4457 if (strEQ(d,"xor")) return -KEY_xor;
4460 if (len == 1) return KEY_y;
4469 checkcomma(register char *s, char *name, char *what)
4473 if (dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
4475 for (w = s+2; *w && level; w++) {
4482 for (; *w && isSPACE(*w); w++) ;
4483 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
4484 warn("%s (...) interpreted as function",name);
4486 while (s < bufend && isSPACE(*s))
4490 while (s < bufend && isSPACE(*s))
4492 if (isIDFIRST(*s)) {
4496 while (s < bufend && isSPACE(*s))
4501 kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
4505 croak("No comma allowed after %s", what);
4511 scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
4513 register char *d = dest;
4514 register char *e = d + destlen - 3; /* two-character token, ending NUL */
4517 croak(ident_too_long);
4520 else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
4525 else if (*s == ':' && s[1] == ':' && allow_package && isIDFIRST(s[2])) {
4538 scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
4545 if (lex_brackets == 0)
4550 e = d + destlen - 3; /* two-character token, ending NUL */
4552 while (isDIGIT(*s)) {
4554 croak(ident_too_long);
4561 croak(ident_too_long);
4564 else if (*s == '\'' && isIDFIRST(s[1])) {
4569 else if (*s == ':' && s[1] == ':') {
4580 if (lex_state != LEX_NORMAL)
4581 lex_state = LEX_INTERPENDMAYBE;
4584 if (*s == '$' && s[1] &&
4585 (isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
4587 if (isDIGIT(s[1]) && lex_state == LEX_INTERPNORMAL)
4588 deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
4601 if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
4606 if (isSPACE(s[-1])) {
4609 if (ch != ' ' && ch != '\t') {
4615 if (isIDFIRST(*d)) {
4617 while (isALNUM(*s) || *s == ':')
4620 while (s < send && (*s == ' ' || *s == '\t')) s++;
4621 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
4622 if (dowarn && keyword(dest, d - dest)) {
4623 char *brack = *s == '[' ? "[...]" : "{...}";
4624 warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
4625 funny, dest, brack, funny, dest, brack);
4627 lex_fakebrack = lex_brackets+1;
4629 lex_brackstack[lex_brackets++] = XOPERATOR;
4635 if (lex_state == LEX_INTERPNORMAL && !lex_brackets)
4636 lex_state = LEX_INTERPEND;
4639 if (dowarn && lex_state == LEX_NORMAL &&
4640 (keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
4641 warn("Ambiguous use of %c{%s} resolved to %c%s",
4642 funny, dest, funny, dest);
4645 s = bracket; /* let the parser handle it */
4649 else if (lex_state == LEX_INTERPNORMAL && !lex_brackets && !intuit_more(s))
4650 lex_state = LEX_INTERPEND;
4654 void pmflag(U16 *pmfl, int ch)
4659 *pmfl |= PMf_GLOBAL;
4661 *pmfl |= PMf_CONTINUE;
4665 *pmfl |= PMf_MULTILINE;
4667 *pmfl |= PMf_SINGLELINE;
4669 *pmfl |= PMf_EXTENDED;
4673 scan_pat(char *start)
4678 s = scan_str(start);
4681 SvREFCNT_dec(lex_stuff);
4683 croak("Search pattern not terminated");
4686 pm = (PMOP*)newPMOP(OP_MATCH, 0);
4687 if (multi_open == '?')
4688 pm->op_pmflags |= PMf_ONCE;
4689 while (*s && strchr("iogcmsx", *s))
4690 pmflag(&pm->op_pmflags,*s++);
4691 pm->op_pmpermflags = pm->op_pmflags;
4694 yylval.ival = OP_MATCH;
4699 scan_subst(char *start)
4706 yylval.ival = OP_NULL;
4708 s = scan_str(start);
4712 SvREFCNT_dec(lex_stuff);
4714 croak("Substitution pattern not terminated");
4717 if (s[-1] == multi_open)
4720 first_start = multi_start;
4724 SvREFCNT_dec(lex_stuff);
4727 SvREFCNT_dec(lex_repl);
4729 croak("Substitution replacement not terminated");
4731 multi_start = first_start; /* so whole substitution is taken together */
4733 pm = (PMOP*)newPMOP(OP_SUBST, 0);
4734 while (*s && strchr("iogcmsex", *s)) {
4740 pmflag(&pm->op_pmflags,*s++);
4745 pm->op_pmflags |= PMf_EVAL;
4746 repl = newSVpv("",0);
4748 sv_catpv(repl, es ? "eval " : "do ");
4749 sv_catpvn(repl, "{ ", 2);
4750 sv_catsv(repl, lex_repl);
4751 sv_catpvn(repl, " };", 2);
4752 SvCOMPILED_on(repl);
4753 SvREFCNT_dec(lex_repl);
4757 pm->op_pmpermflags = pm->op_pmflags;
4759 yylval.ival = OP_SUBST;
4764 scan_trans(char *start)
4773 yylval.ival = OP_NULL;
4775 s = scan_str(start);
4778 SvREFCNT_dec(lex_stuff);
4780 croak("Translation pattern not terminated");
4782 if (s[-1] == multi_open)
4788 SvREFCNT_dec(lex_stuff);
4791 SvREFCNT_dec(lex_repl);
4793 croak("Translation replacement not terminated");
4796 New(803,tbl,256,short);
4797 o = newPVOP(OP_TRANS, 0, (char*)tbl);
4799 complement = Delete = squash = 0;
4800 while (*s == 'c' || *s == 'd' || *s == 's') {
4802 complement = OPpTRANS_COMPLEMENT;
4804 Delete = OPpTRANS_DELETE;
4806 squash = OPpTRANS_SQUASH;
4809 o->op_private = Delete|squash|complement;
4812 yylval.ival = OP_TRANS;
4817 scan_heredoc(register char *s)
4821 I32 op_type = OP_SCALAR;
4828 int outer = (rsfp && !lex_inwhat);
4832 e = tokenbuf + sizeof tokenbuf - 1;
4835 for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
4836 if (*peek && strchr("`'\"",*peek)) {
4839 s = delimcpy(d, e, s, bufend, term, &len);
4850 deprecate("bare << to mean <<\"\"");
4851 for (; isALNUM(*s); s++) {
4856 if (d >= tokenbuf + sizeof tokenbuf - 1)
4857 croak("Delimiter for here document is too long");
4862 if (outer || !(d=ninstr(s,bufend,d,d+1)))
4863 herewas = newSVpv(s,bufend-s);
4865 s--, herewas = newSVpv(s,d-s);
4866 s += SvCUR(herewas);
4868 tmpstr = NEWSV(87,80);
4869 sv_upgrade(tmpstr, SVt_PVIV);
4874 else if (term == '`') {
4875 op_type = OP_BACKTICK;
4876 SvIVX(tmpstr) = '\\';
4880 multi_start = curcop->cop_line;
4881 multi_open = multi_close = '<';
4885 while (s < bufend &&
4886 (*s != term || memNE(s,tokenbuf,len)) ) {
4891 curcop->cop_line = multi_start;
4892 missingterm(tokenbuf);
4894 sv_setpvn(tmpstr,d+1,s-d);
4896 curcop->cop_line++; /* the preceding stmt passes a newline */
4898 sv_catpvn(herewas,s,bufend-s);
4899 sv_setsv(linestr,herewas);
4900 oldoldbufptr = oldbufptr = bufptr = s = linestart = SvPVX(linestr);
4901 bufend = SvPVX(linestr) + SvCUR(linestr);
4904 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
4905 while (s >= bufend) { /* multiple line string? */
4907 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
4908 curcop->cop_line = multi_start;
4909 missingterm(tokenbuf);
4912 if (PERLDB_LINE && curstash != debstash) {
4913 SV *sv = NEWSV(88,0);
4915 sv_upgrade(sv, SVt_PVMG);
4916 sv_setsv(sv,linestr);
4917 av_store(GvAV(curcop->cop_filegv),
4918 (I32)curcop->cop_line,sv);
4920 bufend = SvPVX(linestr) + SvCUR(linestr);
4921 if (*s == term && memEQ(s,tokenbuf,len)) {
4924 sv_catsv(linestr,herewas);
4925 bufend = SvPVX(linestr) + SvCUR(linestr);
4929 sv_catsv(tmpstr,linestr);
4932 multi_end = curcop->cop_line;
4934 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
4935 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
4936 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
4938 SvREFCNT_dec(herewas);
4940 yylval.ival = op_type;
4945 scan_inputsymbol(char *start)
4947 register char *s = start;
4953 e = tokenbuf + sizeof tokenbuf;
4954 s = delimcpy(d, e, s + 1, bufend, '>', &len);
4955 if (len >= sizeof tokenbuf)
4956 croak("Excessively long <> operator");
4958 croak("Unterminated <> operator");
4960 if (*d == '$' && d[1]) d++;
4961 while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
4963 if (d - tokenbuf != len) {
4964 yylval.ival = OP_GLOB;
4966 s = scan_str(start);
4968 croak("Glob not terminated");
4974 (void)strcpy(d,"ARGV");
4977 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
4978 OP *o = newOP(OP_PADSV, 0);
4980 lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
4983 GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
4984 lex_op = (OP*)newUNOP(OP_READLINE, 0,
4985 newUNOP(OP_RV2GV, 0,
4986 newUNOP(OP_RV2SV, 0,
4987 newGVOP(OP_GV, 0, gv))));
4989 yylval.ival = OP_NULL;
4992 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
4993 lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
4994 yylval.ival = OP_NULL;
5001 scan_str(char *start)
5006 register char *s = start;
5015 multi_start = curcop->cop_line;
5017 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
5022 sv_upgrade(sv, SVt_PVIV);
5024 (void)SvPOK_only(sv); /* validate pointer */
5027 SvGROW(sv, SvCUR(sv) + (bufend - s) + 1);
5028 to = SvPVX(sv)+SvCUR(sv);
5029 if (multi_open == multi_close) {
5030 for (; s < bufend; s++,to++) {
5031 if (*s == '\n' && !rsfp)
5033 if (*s == '\\' && s+1 < bufend && term != '\\') {
5039 else if (*s == term)
5045 for (; s < bufend; s++,to++) {
5046 if (*s == '\n' && !rsfp)
5048 if (*s == '\\' && s+1 < bufend) {
5049 if ((s[1] == multi_open) || (s[1] == multi_close))
5054 else if (*s == multi_close && --brackets <= 0)
5056 else if (*s == multi_open)
5062 SvCUR_set(sv, to - SvPVX(sv));
5064 if (s < bufend) break; /* string ends on this line? */
5067 !(oldoldbufptr = oldbufptr = s = linestart = filter_gets(linestr, rsfp, 0))) {
5069 curcop->cop_line = multi_start;
5073 if (PERLDB_LINE && curstash != debstash) {
5074 SV *sv = NEWSV(88,0);
5076 sv_upgrade(sv, SVt_PVMG);
5077 sv_setsv(sv,linestr);
5078 av_store(GvAV(curcop->cop_filegv),
5079 (I32)curcop->cop_line, sv);
5081 bufend = SvPVX(linestr) + SvCUR(linestr);
5083 multi_end = curcop->cop_line;
5085 if (SvCUR(sv) + 5 < SvLEN(sv)) {
5086 SvLEN_set(sv, SvCUR(sv) + 1);
5087 Renew(SvPVX(sv), SvLEN(sv), char);
5097 scan_num(char *start)
5099 register char *s = start;
5107 static char number_too_long[] = "Number too long";
5111 croak("panic: scan_num");
5116 bool overflowed = FALSE;
5122 else if (s[1] == '.')
5138 yyerror("Illegal octal digit");
5140 case '0': case '1': case '2': case '3': case '4':
5141 case '5': case '6': case '7':
5144 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
5145 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
5151 if (!overflowed && (n >> shift) != u) {
5152 warn("Integer overflow in %s number",
5153 (shift == 4) ? "hex" : "octal");
5165 case '1': case '2': case '3': case '4': case '5':
5166 case '6': case '7': case '8': case '9': case '.':
5169 e = tokenbuf + sizeof tokenbuf - 6; /* room for various punctuation */
5171 while (isDIGIT(*s) || *s == '_') {
5173 if (dowarn && lastub && s - lastub != 3)
5174 warn("Misplaced _ in number");
5179 croak(number_too_long);
5183 if (dowarn && lastub && s - lastub != 3)
5184 warn("Misplaced _ in number");
5185 if (*s == '.' && s[1] != '.') {
5188 for (; isDIGIT(*s) || *s == '_'; s++) {
5190 croak(number_too_long);
5195 if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
5198 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
5199 if (*s == '+' || *s == '-')
5201 while (isDIGIT(*s)) {
5203 croak(number_too_long);
5209 SET_NUMERIC_STANDARD();
5210 value = atof(tokenbuf);
5212 if (!floatit && (double)tryiv == value)
5213 sv_setiv(sv, tryiv);
5215 sv_setnv(sv, value);
5219 yylval.opval = newSVOP(OP_CONST, 0, sv);
5225 scan_formline(register char *s)
5230 SV *stuff = newSVpv("",0);
5231 bool needargs = FALSE;
5234 if (*s == '.' || *s == '}') {
5236 for (t = s+1; *t == ' ' || *t == '\t'; t++) ;
5240 if (in_eval && !rsfp) {
5241 eol = strchr(s,'\n');
5246 eol = bufend = SvPVX(linestr) + SvCUR(linestr);
5248 for (t = s; t < eol; t++) {
5249 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
5251 goto enough; /* ~~ must be first line in formline */
5253 if (*t == '@' || *t == '^')
5256 sv_catpvn(stuff, s, eol-s);
5260 s = filter_gets(linestr, rsfp, 0);
5261 oldoldbufptr = oldbufptr = bufptr = linestart = SvPVX(linestr);
5262 bufend = bufptr + SvCUR(linestr);
5265 yyerror("Format not terminated");
5275 lex_state = LEX_NORMAL;
5276 nextval[nexttoke].ival = 0;
5280 lex_state = LEX_FORMLINE;
5281 nextval[nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
5283 nextval[nexttoke].ival = OP_FORMLINE;
5287 SvREFCNT_dec(stuff);
5299 cshlen = strlen(cshname);
5304 start_subparse(I32 is_format, U32 flags)
5307 I32 oldsavestack_ix = savestack_ix;
5308 CV* outsidecv = compcv;
5312 assert(SvTYPE(compcv) == SVt_PVCV);
5319 SAVESPTR(comppad_name);
5321 SAVEI32(comppad_name_fill);
5322 SAVEI32(min_intro_pending);
5323 SAVEI32(max_intro_pending);
5324 SAVEI32(pad_reset_pending);
5326 compcv = (CV*)NEWSV(1104,0);
5327 sv_upgrade((SV *)compcv, is_format ? SVt_PVFM : SVt_PVCV);
5328 CvFLAGS(compcv) |= flags;
5331 av_push(comppad, Nullsv);
5332 curpad = AvARRAY(comppad);
5333 comppad_name = newAV();
5334 comppad_name_fill = 0;
5335 min_intro_pending = 0;
5337 subline = curcop->cop_line;
5339 av_store(comppad_name, 0, newSVpv("@_", 2));
5340 curpad[0] = (SV*)newAV();
5341 SvPADMY_on(curpad[0]); /* XXX Needed? */
5342 CvOWNER(compcv) = 0;
5343 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5344 MUTEX_INIT(CvMUTEXP(compcv));
5345 #endif /* USE_THREADS */
5347 comppadlist = newAV();
5348 AvREAL_off(comppadlist);
5349 av_store(comppadlist, 0, (SV*)comppad_name);
5350 av_store(comppadlist, 1, (SV*)comppad);
5352 CvPADLIST(compcv) = comppadlist;
5353 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(outsidecv);
5355 CvOWNER(compcv) = 0;
5356 New(666, CvMUTEXP(compcv), 1, perl_mutex);
5357 MUTEX_INIT(CvMUTEXP(compcv));
5358 #endif /* USE_THREADS */
5360 return oldsavestack_ix;
5379 char *context = NULL;
5383 if (!yychar || (yychar == ';' && !rsfp))
5385 else if (bufptr > oldoldbufptr && bufptr - oldoldbufptr < 200 &&
5386 oldoldbufptr != oldbufptr && oldbufptr != bufptr) {
5387 while (isSPACE(*oldoldbufptr))
5389 context = oldoldbufptr;
5390 contlen = bufptr - oldoldbufptr;
5392 else if (bufptr > oldbufptr && bufptr - oldbufptr < 200 &&
5393 oldbufptr != bufptr) {
5394 while (isSPACE(*oldbufptr))
5396 context = oldbufptr;
5397 contlen = bufptr - oldbufptr;
5399 else if (yychar > 255)
5400 where = "next token ???";
5401 else if ((yychar & 127) == 127) {
5402 if (lex_state == LEX_NORMAL ||
5403 (lex_state == LEX_KNOWNEXT && lex_defer == LEX_NORMAL))
5404 where = "at end of line";
5406 where = "within pattern";
5408 where = "within string";
5411 SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
5413 sv_catpvf(where_sv, "^%c", toCTRL(yychar));
5414 else if (isPRINT_LC(yychar))
5415 sv_catpvf(where_sv, "%c", yychar);
5417 sv_catpvf(where_sv, "\\%03o", yychar & 255);
5418 where = SvPVX(where_sv);
5420 msg = sv_2mortal(newSVpv(s, 0));
5421 sv_catpvf(msg, " at %_ line %ld, ",
5422 GvSV(curcop->cop_filegv), (long)curcop->cop_line);
5424 sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
5426 sv_catpvf(msg, "%s\n", where);
5427 if (multi_start < multi_end && (U32)(curcop->cop_line - multi_end) <= 1) {
5429 " (Might be a runaway multi-line %c%c string starting on line %ld)\n",
5430 (int)multi_open,(int)multi_close,(long)multi_start);
5436 sv_catsv(ERRSV, msg);
5438 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
5439 if (++error_count >= 10)
5440 croak("%_ has too many errors.\n", GvSV(curcop->cop_filegv));
5442 in_my_stash = Nullhv;