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a0d0e21e 1/* toke.c
a687059c 2 *
bc89e66f 3 * Copyright (c) 1991-2001, Larry Wall
a687059c 4 *
d48672a2
LW
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.
378cc40b 7 *
a0d0e21e
LW
8 */
9
10/*
11 * "It all comes from here, the stench and the peril." --Frodo
378cc40b
LW
12 */
13
9cbb5ea2
GS
14/*
15 * This file is the lexer for Perl. It's closely linked to the
4e553d73 16 * parser, perly.y.
ffb4593c
NT
17 *
18 * The main routine is yylex(), which returns the next token.
19 */
20
378cc40b 21#include "EXTERN.h"
864dbfa3 22#define PERL_IN_TOKE_C
378cc40b 23#include "perl.h"
378cc40b 24
d3b6f988
GS
25#define yychar PL_yychar
26#define yylval PL_yylval
27
fc36a67e 28static char ident_too_long[] = "Identifier too long";
8903cb82 29
acfe0abc 30static void restore_rsfp(pTHX_ void *f);
6e3aabd6 31#ifndef PERL_NO_UTF16_FILTER
acfe0abc
GS
32static I32 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen);
33static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen);
6e3aabd6 34#endif
51371543 35
9059aa12
LW
36#define XFAKEBRACK 128
37#define XENUMMASK 127
38
39e02b42
JH
39#ifdef USE_UTF8_SCRIPTS
40# define UTF (!IN_BYTES)
2b9d42f0 41#else
39e02b42
JH
42# ifdef EBCDIC /* For now 'use utf8' does not affect tokenizer on EBCDIC */
43# define UTF (PL_linestr && DO_UTF8(PL_linestr))
44# else
45# define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
46# endif
2b9d42f0 47#endif
a0ed51b3 48
61f0cdd9 49/* In variables named $^X, these are the legal values for X.
2b92dfce
GS
50 * 1999-02-27 mjd-perl-patch@plover.com */
51#define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x)))
52
bf4acbe4
GS
53/* On MacOS, respect nonbreaking spaces */
54#ifdef MACOS_TRADITIONAL
55#define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t')
56#else
57#define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t')
58#endif
59
ffb4593c
NT
60/* LEX_* are values for PL_lex_state, the state of the lexer.
61 * They are arranged oddly so that the guard on the switch statement
79072805
LW
62 * can get by with a single comparison (if the compiler is smart enough).
63 */
64
fb73857a 65/* #define LEX_NOTPARSING 11 is done in perl.h. */
66
55497cff 67#define LEX_NORMAL 10
68#define LEX_INTERPNORMAL 9
69#define LEX_INTERPCASEMOD 8
70#define LEX_INTERPPUSH 7
71#define LEX_INTERPSTART 6
72#define LEX_INTERPEND 5
73#define LEX_INTERPENDMAYBE 4
74#define LEX_INTERPCONCAT 3
75#define LEX_INTERPCONST 2
76#define LEX_FORMLINE 1
77#define LEX_KNOWNEXT 0
79072805 78
79072805
LW
79#ifdef ff_next
80#undef ff_next
d48672a2
LW
81#endif
82
a1a0e61e 83#ifdef USE_PURE_BISON
dba4d153
JH
84# ifndef YYMAXLEVEL
85# define YYMAXLEVEL 100
86# endif
20141f0e
IRC
87YYSTYPE* yylval_pointer[YYMAXLEVEL];
88int* yychar_pointer[YYMAXLEVEL];
6f202aea 89int yyactlevel = -1;
22c35a8c
GS
90# undef yylval
91# undef yychar
20141f0e
IRC
92# define yylval (*yylval_pointer[yyactlevel])
93# define yychar (*yychar_pointer[yyactlevel])
94# define PERL_YYLEX_PARAM yylval_pointer[yyactlevel],yychar_pointer[yyactlevel]
4e553d73 95# undef yylex
dba4d153 96# define yylex() Perl_yylex_r(aTHX_ yylval_pointer[yyactlevel],yychar_pointer[yyactlevel])
a1a0e61e
TD
97#endif
98
79072805 99#include "keywords.h"
fe14fcc3 100
ffb4593c
NT
101/* CLINE is a macro that ensures PL_copline has a sane value */
102
ae986130
LW
103#ifdef CLINE
104#undef CLINE
105#endif
57843af0 106#define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline))
3280af22 107
ffb4593c
NT
108/*
109 * Convenience functions to return different tokens and prime the
9cbb5ea2 110 * lexer for the next token. They all take an argument.
ffb4593c
NT
111 *
112 * TOKEN : generic token (used for '(', DOLSHARP, etc)
113 * OPERATOR : generic operator
114 * AOPERATOR : assignment operator
115 * PREBLOCK : beginning the block after an if, while, foreach, ...
116 * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref)
117 * PREREF : *EXPR where EXPR is not a simple identifier
118 * TERM : expression term
119 * LOOPX : loop exiting command (goto, last, dump, etc)
120 * FTST : file test operator
121 * FUN0 : zero-argument function
2d2e263d 122 * FUN1 : not used, except for not, which isn't a UNIOP
ffb4593c
NT
123 * BOop : bitwise or or xor
124 * BAop : bitwise and
125 * SHop : shift operator
126 * PWop : power operator
9cbb5ea2 127 * PMop : pattern-matching operator
ffb4593c
NT
128 * Aop : addition-level operator
129 * Mop : multiplication-level operator
130 * Eop : equality-testing operator
e5edeb50 131 * Rop : relational operator <= != gt
ffb4593c
NT
132 *
133 * Also see LOP and lop() below.
134 */
135
075953c3
JH
136/* Note that REPORT() and REPORT2() will be expressions that supply
137 * their own trailing comma, not suitable for statements as such. */
998054bd 138#ifdef DEBUGGING /* Serve -DT. */
075953c3
JH
139# define REPORT(x,retval) tokereport(x,s,(int)retval),
140# define REPORT2(x,retval) tokereport(x,s, yylval.ival),
998054bd 141#else
075953c3
JH
142# define REPORT(x,retval)
143# define REPORT2(x,retval)
998054bd
SC
144#endif
145
075953c3
JH
146#define TOKEN(retval) return (REPORT2("token",retval) PL_bufptr = s,(int)retval)
147#define OPERATOR(retval) return (REPORT2("operator",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval)
148#define AOPERATOR(retval) return ao((REPORT2("aop",retval) PL_expect = XTERM, PL_bufptr = s,(int)retval))
149#define PREBLOCK(retval) return (REPORT2("preblock",retval) PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
150#define PRETERMBLOCK(retval) return (REPORT2("pretermblock",retval) PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
151#define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
152#define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
153#define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
154#define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
155#define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
156#define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
157#define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
158#define BAop(f) return ao((yylval.ival=f, REPORT("bitandop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
159#define SHop(f) return ao((yylval.ival=f, REPORT("shiftop",f) PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
160#define PWop(f) return ao((yylval.ival=f, REPORT("powop",f) PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
161#define PMop(f) return(yylval.ival=f, REPORT("matchop",f) PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
162#define Aop(f) return ao((yylval.ival=f, REPORT("add",f) PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
163#define Mop(f) return ao((yylval.ival=f, REPORT("mul",f) PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
164#define Eop(f) return(yylval.ival=f, REPORT("eq",f) PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
165#define Rop(f) return(yylval.ival=f, REPORT("rel",f) PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
2f3197b3 166
a687059c
LW
167/* This bit of chicanery makes a unary function followed by
168 * a parenthesis into a function with one argument, highest precedence.
169 */
2f3197b3 170#define UNI(f) return(yylval.ival = f, \
075953c3 171 REPORT("uni",f) \
3280af22
NIS
172 PL_expect = XTERM, \
173 PL_bufptr = s, \
174 PL_last_uni = PL_oldbufptr, \
175 PL_last_lop_op = f, \
a687059c
LW
176 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
177
79072805 178#define UNIBRACK(f) return(yylval.ival = f, \
075953c3 179 REPORT("uni",f) \
3280af22
NIS
180 PL_bufptr = s, \
181 PL_last_uni = PL_oldbufptr, \
79072805
LW
182 (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
183
9f68db38 184/* grandfather return to old style */
3280af22 185#define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
79072805 186
8fa7f367
JH
187#ifdef DEBUGGING
188
2d00ba3b 189STATIC void
61b2116b 190S_tokereport(pTHX_ char *thing, char* s, I32 rv)
9041c2e3 191{
998054bd 192 DEBUG_T({
9c5ffd7c 193 SV* report = newSVpv(thing, 0);
29b291f7
RB
194 Perl_sv_catpvf(aTHX_ report, ":line %d:%"IVdf":", CopLINE(PL_curcop),
195 (IV)rv);
998054bd
SC
196
197 if (s - PL_bufptr > 0)
198 sv_catpvn(report, PL_bufptr, s - PL_bufptr);
199 else {
200 if (PL_oldbufptr && *PL_oldbufptr)
201 sv_catpv(report, PL_tokenbuf);
202 }
203 PerlIO_printf(Perl_debug_log, "### %s\n", SvPV_nolen(report));
5f80b19c 204 });
998054bd
SC
205}
206
8fa7f367
JH
207#endif
208
ffb4593c
NT
209/*
210 * S_ao
211 *
212 * This subroutine detects &&= and ||= and turns an ANDAND or OROR
213 * into an OP_ANDASSIGN or OP_ORASSIGN
214 */
215
76e3520e 216STATIC int
cea2e8a9 217S_ao(pTHX_ int toketype)
a0d0e21e 218{
3280af22
NIS
219 if (*PL_bufptr == '=') {
220 PL_bufptr++;
a0d0e21e
LW
221 if (toketype == ANDAND)
222 yylval.ival = OP_ANDASSIGN;
223 else if (toketype == OROR)
224 yylval.ival = OP_ORASSIGN;
225 toketype = ASSIGNOP;
226 }
227 return toketype;
228}
229
ffb4593c
NT
230/*
231 * S_no_op
232 * When Perl expects an operator and finds something else, no_op
233 * prints the warning. It always prints "<something> found where
234 * operator expected. It prints "Missing semicolon on previous line?"
235 * if the surprise occurs at the start of the line. "do you need to
236 * predeclare ..." is printed out for code like "sub bar; foo bar $x"
237 * where the compiler doesn't know if foo is a method call or a function.
238 * It prints "Missing operator before end of line" if there's nothing
239 * after the missing operator, or "... before <...>" if there is something
240 * after the missing operator.
241 */
242
76e3520e 243STATIC void
cea2e8a9 244S_no_op(pTHX_ char *what, char *s)
463ee0b2 245{
3280af22
NIS
246 char *oldbp = PL_bufptr;
247 bool is_first = (PL_oldbufptr == PL_linestart);
68dc0745 248
1189a94a
GS
249 if (!s)
250 s = oldbp;
07c798fb 251 else
1189a94a 252 PL_bufptr = s;
cea2e8a9 253 yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
748a9306 254 if (is_first)
cea2e8a9 255 Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
7e2040f0 256 else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) {
748a9306 257 char *t;
7e2040f0 258 for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ;
3280af22 259 if (t < PL_bufptr && isSPACE(*t))
cea2e8a9 260 Perl_warn(aTHX_ "\t(Do you need to predeclare %.*s?)\n",
3280af22 261 t - PL_oldoldbufptr, PL_oldoldbufptr);
748a9306 262 }
07c798fb
HS
263 else {
264 assert(s >= oldbp);
cea2e8a9 265 Perl_warn(aTHX_ "\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
07c798fb 266 }
3280af22 267 PL_bufptr = oldbp;
8990e307
LW
268}
269
ffb4593c
NT
270/*
271 * S_missingterm
272 * Complain about missing quote/regexp/heredoc terminator.
273 * If it's called with (char *)NULL then it cauterizes the line buffer.
274 * If we're in a delimited string and the delimiter is a control
275 * character, it's reformatted into a two-char sequence like ^C.
276 * This is fatal.
277 */
278
76e3520e 279STATIC void
cea2e8a9 280S_missingterm(pTHX_ char *s)
8990e307
LW
281{
282 char tmpbuf[3];
283 char q;
284 if (s) {
285 char *nl = strrchr(s,'\n');
d2719217 286 if (nl)
8990e307
LW
287 *nl = '\0';
288 }
9d116dd7
JH
289 else if (
290#ifdef EBCDIC
291 iscntrl(PL_multi_close)
292#else
293 PL_multi_close < 32 || PL_multi_close == 127
294#endif
295 ) {
8990e307 296 *tmpbuf = '^';
3280af22 297 tmpbuf[1] = toCTRL(PL_multi_close);
8990e307
LW
298 s = "\\n";
299 tmpbuf[2] = '\0';
300 s = tmpbuf;
301 }
302 else {
3280af22 303 *tmpbuf = PL_multi_close;
8990e307
LW
304 tmpbuf[1] = '\0';
305 s = tmpbuf;
306 }
307 q = strchr(s,'"') ? '\'' : '"';
cea2e8a9 308 Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
463ee0b2 309}
79072805 310
ffb4593c
NT
311/*
312 * Perl_deprecate
ffb4593c
NT
313 */
314
79072805 315void
864dbfa3 316Perl_deprecate(pTHX_ char *s)
a0d0e21e 317{
599cee73 318 if (ckWARN(WARN_DEPRECATED))
cea2e8a9 319 Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
a0d0e21e
LW
320}
321
ffb4593c
NT
322/*
323 * depcom
9cbb5ea2 324 * Deprecate a comma-less variable list.
ffb4593c
NT
325 */
326
76e3520e 327STATIC void
cea2e8a9 328S_depcom(pTHX)
a0d0e21e
LW
329{
330 deprecate("comma-less variable list");
331}
332
ffb4593c 333/*
9cbb5ea2
GS
334 * experimental text filters for win32 carriage-returns, utf16-to-utf8 and
335 * utf16-to-utf8-reversed.
ffb4593c
NT
336 */
337
c39cd008
GS
338#ifdef PERL_CR_FILTER
339static void
340strip_return(SV *sv)
341{
342 register char *s = SvPVX(sv);
343 register char *e = s + SvCUR(sv);
344 /* outer loop optimized to do nothing if there are no CR-LFs */
345 while (s < e) {
346 if (*s++ == '\r' && *s == '\n') {
347 /* hit a CR-LF, need to copy the rest */
348 register char *d = s - 1;
349 *d++ = *s++;
350 while (s < e) {
351 if (*s == '\r' && s[1] == '\n')
352 s++;
353 *d++ = *s++;
354 }
355 SvCUR(sv) -= s - d;
356 return;
357 }
358 }
359}
a868473f 360
76e3520e 361STATIC I32
c39cd008 362S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen)
a868473f 363{
c39cd008
GS
364 I32 count = FILTER_READ(idx+1, sv, maxlen);
365 if (count > 0 && !maxlen)
366 strip_return(sv);
367 return count;
a868473f
NIS
368}
369#endif
370
ffb4593c
NT
371/*
372 * Perl_lex_start
9cbb5ea2
GS
373 * Initialize variables. Uses the Perl save_stack to save its state (for
374 * recursive calls to the parser).
ffb4593c
NT
375 */
376
a0d0e21e 377void
864dbfa3 378Perl_lex_start(pTHX_ SV *line)
79072805 379{
8990e307
LW
380 char *s;
381 STRLEN len;
382
3280af22
NIS
383 SAVEI32(PL_lex_dojoin);
384 SAVEI32(PL_lex_brackets);
3280af22
NIS
385 SAVEI32(PL_lex_casemods);
386 SAVEI32(PL_lex_starts);
387 SAVEI32(PL_lex_state);
7766f137 388 SAVEVPTR(PL_lex_inpat);
3280af22 389 SAVEI32(PL_lex_inwhat);
18b09519
GS
390 if (PL_lex_state == LEX_KNOWNEXT) {
391 I32 toke = PL_nexttoke;
392 while (--toke >= 0) {
393 SAVEI32(PL_nexttype[toke]);
394 SAVEVPTR(PL_nextval[toke]);
395 }
396 SAVEI32(PL_nexttoke);
18b09519 397 }
57843af0 398 SAVECOPLINE(PL_curcop);
3280af22
NIS
399 SAVEPPTR(PL_bufptr);
400 SAVEPPTR(PL_bufend);
401 SAVEPPTR(PL_oldbufptr);
402 SAVEPPTR(PL_oldoldbufptr);
207e3d1a
JH
403 SAVEPPTR(PL_last_lop);
404 SAVEPPTR(PL_last_uni);
3280af22
NIS
405 SAVEPPTR(PL_linestart);
406 SAVESPTR(PL_linestr);
407 SAVEPPTR(PL_lex_brackstack);
408 SAVEPPTR(PL_lex_casestack);
c76ac1ee 409 SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
3280af22
NIS
410 SAVESPTR(PL_lex_stuff);
411 SAVEI32(PL_lex_defer);
09bef843 412 SAVEI32(PL_sublex_info.sub_inwhat);
3280af22 413 SAVESPTR(PL_lex_repl);
bebdddfc
GS
414 SAVEINT(PL_expect);
415 SAVEINT(PL_lex_expect);
3280af22
NIS
416
417 PL_lex_state = LEX_NORMAL;
418 PL_lex_defer = 0;
419 PL_expect = XSTATE;
420 PL_lex_brackets = 0;
3280af22
NIS
421 New(899, PL_lex_brackstack, 120, char);
422 New(899, PL_lex_casestack, 12, char);
423 SAVEFREEPV(PL_lex_brackstack);
424 SAVEFREEPV(PL_lex_casestack);
425 PL_lex_casemods = 0;
426 *PL_lex_casestack = '\0';
427 PL_lex_dojoin = 0;
428 PL_lex_starts = 0;
429 PL_lex_stuff = Nullsv;
430 PL_lex_repl = Nullsv;
431 PL_lex_inpat = 0;
76be56bc 432 PL_nexttoke = 0;
3280af22 433 PL_lex_inwhat = 0;
09bef843 434 PL_sublex_info.sub_inwhat = 0;
3280af22
NIS
435 PL_linestr = line;
436 if (SvREADONLY(PL_linestr))
437 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
438 s = SvPV(PL_linestr, len);
8990e307 439 if (len && s[len-1] != ';') {
3280af22
NIS
440 if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
441 PL_linestr = sv_2mortal(newSVsv(PL_linestr));
442 sv_catpvn(PL_linestr, "\n;", 2);
8990e307 443 }
3280af22
NIS
444 SvTEMP_off(PL_linestr);
445 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
446 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
207e3d1a 447 PL_last_lop = PL_last_uni = Nullch;
3280af22 448 PL_rsfp = 0;
79072805 449}
a687059c 450
ffb4593c
NT
451/*
452 * Perl_lex_end
9cbb5ea2
GS
453 * Finalizer for lexing operations. Must be called when the parser is
454 * done with the lexer.
ffb4593c
NT
455 */
456
463ee0b2 457void
864dbfa3 458Perl_lex_end(pTHX)
463ee0b2 459{
3280af22 460 PL_doextract = FALSE;
463ee0b2
LW
461}
462
ffb4593c
NT
463/*
464 * S_incline
465 * This subroutine has nothing to do with tilting, whether at windmills
466 * or pinball tables. Its name is short for "increment line". It
57843af0 467 * increments the current line number in CopLINE(PL_curcop) and checks
ffb4593c 468 * to see whether the line starts with a comment of the form
9cbb5ea2
GS
469 * # line 500 "foo.pm"
470 * If so, it sets the current line number and file to the values in the comment.
ffb4593c
NT
471 */
472
76e3520e 473STATIC void
cea2e8a9 474S_incline(pTHX_ char *s)
463ee0b2
LW
475{
476 char *t;
477 char *n;
73659bf1 478 char *e;
463ee0b2 479 char ch;
463ee0b2 480
57843af0 481 CopLINE_inc(PL_curcop);
463ee0b2
LW
482 if (*s++ != '#')
483 return;
bf4acbe4 484 while (SPACE_OR_TAB(*s)) s++;
73659bf1
GS
485 if (strnEQ(s, "line", 4))
486 s += 4;
487 else
488 return;
084592ab 489 if (SPACE_OR_TAB(*s))
73659bf1 490 s++;
4e553d73 491 else
73659bf1 492 return;
bf4acbe4 493 while (SPACE_OR_TAB(*s)) s++;
463ee0b2
LW
494 if (!isDIGIT(*s))
495 return;
496 n = s;
497 while (isDIGIT(*s))
498 s++;
bf4acbe4 499 while (SPACE_OR_TAB(*s))
463ee0b2 500 s++;
73659bf1 501 if (*s == '"' && (t = strchr(s+1, '"'))) {
463ee0b2 502 s++;
73659bf1
GS
503 e = t + 1;
504 }
463ee0b2 505 else {
463ee0b2 506 for (t = s; !isSPACE(*t); t++) ;
73659bf1 507 e = t;
463ee0b2 508 }
bf4acbe4 509 while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
73659bf1
GS
510 e++;
511 if (*e != '\n' && *e != '\0')
512 return; /* false alarm */
513
463ee0b2
LW
514 ch = *t;
515 *t = '\0';
f4dd75d9
GS
516 if (t - s > 0) {
517#ifdef USE_ITHREADS
518 Safefree(CopFILE(PL_curcop));
519#else
520 SvREFCNT_dec(CopFILEGV(PL_curcop));
521#endif
57843af0 522 CopFILE_set(PL_curcop, s);
f4dd75d9 523 }
463ee0b2 524 *t = ch;
57843af0 525 CopLINE_set(PL_curcop, atoi(n)-1);
463ee0b2
LW
526}
527
ffb4593c
NT
528/*
529 * S_skipspace
530 * Called to gobble the appropriate amount and type of whitespace.
531 * Skips comments as well.
532 */
533
76e3520e 534STATIC char *
cea2e8a9 535S_skipspace(pTHX_ register char *s)
a687059c 536{
3280af22 537 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
bf4acbe4 538 while (s < PL_bufend && SPACE_OR_TAB(*s))
463ee0b2
LW
539 s++;
540 return s;
541 }
542 for (;;) {
fd049845 543 STRLEN prevlen;
09bef843 544 SSize_t oldprevlen, oldoldprevlen;
9c5ffd7c 545 SSize_t oldloplen = 0, oldunilen = 0;
60e6418e
GS
546 while (s < PL_bufend && isSPACE(*s)) {
547 if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
548 incline(s);
549 }
ffb4593c
NT
550
551 /* comment */
3280af22
NIS
552 if (s < PL_bufend && *s == '#') {
553 while (s < PL_bufend && *s != '\n')
463ee0b2 554 s++;
60e6418e 555 if (s < PL_bufend) {
463ee0b2 556 s++;
60e6418e
GS
557 if (PL_in_eval && !PL_rsfp) {
558 incline(s);
559 continue;
560 }
561 }
463ee0b2 562 }
ffb4593c
NT
563
564 /* only continue to recharge the buffer if we're at the end
565 * of the buffer, we're not reading from a source filter, and
566 * we're in normal lexing mode
567 */
09bef843
SB
568 if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
569 PL_lex_state == LEX_FORMLINE)
463ee0b2 570 return s;
ffb4593c
NT
571
572 /* try to recharge the buffer */
9cbb5ea2
GS
573 if ((s = filter_gets(PL_linestr, PL_rsfp,
574 (prevlen = SvCUR(PL_linestr)))) == Nullch)
575 {
576 /* end of file. Add on the -p or -n magic */
3280af22
NIS
577 if (PL_minus_n || PL_minus_p) {
578 sv_setpv(PL_linestr,PL_minus_p ?
08e9d68e
DD
579 ";}continue{print or die qq(-p destination: $!\\n)" :
580 "");
3280af22
NIS
581 sv_catpv(PL_linestr,";}");
582 PL_minus_n = PL_minus_p = 0;
a0d0e21e
LW
583 }
584 else
3280af22 585 sv_setpv(PL_linestr,";");
ffb4593c
NT
586
587 /* reset variables for next time we lex */
9cbb5ea2
GS
588 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
589 = SvPVX(PL_linestr);
3280af22 590 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 591 PL_last_lop = PL_last_uni = Nullch;
ffb4593c
NT
592
593 /* Close the filehandle. Could be from -P preprocessor,
594 * STDIN, or a regular file. If we were reading code from
595 * STDIN (because the commandline held no -e or filename)
596 * then we don't close it, we reset it so the code can
597 * read from STDIN too.
598 */
599
3280af22
NIS
600 if (PL_preprocess && !PL_in_eval)
601 (void)PerlProc_pclose(PL_rsfp);
602 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
603 PerlIO_clearerr(PL_rsfp);
8990e307 604 else
3280af22
NIS
605 (void)PerlIO_close(PL_rsfp);
606 PL_rsfp = Nullfp;
463ee0b2
LW
607 return s;
608 }
ffb4593c
NT
609
610 /* not at end of file, so we only read another line */
09bef843
SB
611 /* make corresponding updates to old pointers, for yyerror() */
612 oldprevlen = PL_oldbufptr - PL_bufend;
613 oldoldprevlen = PL_oldoldbufptr - PL_bufend;
614 if (PL_last_uni)
615 oldunilen = PL_last_uni - PL_bufend;
616 if (PL_last_lop)
617 oldloplen = PL_last_lop - PL_bufend;
3280af22
NIS
618 PL_linestart = PL_bufptr = s + prevlen;
619 PL_bufend = s + SvCUR(PL_linestr);
620 s = PL_bufptr;
09bef843
SB
621 PL_oldbufptr = s + oldprevlen;
622 PL_oldoldbufptr = s + oldoldprevlen;
623 if (PL_last_uni)
624 PL_last_uni = s + oldunilen;
625 if (PL_last_lop)
626 PL_last_lop = s + oldloplen;
a0d0e21e 627 incline(s);
ffb4593c
NT
628
629 /* debugger active and we're not compiling the debugger code,
630 * so store the line into the debugger's array of lines
631 */
3280af22 632 if (PERLDB_LINE && PL_curstash != PL_debstash) {
8990e307
LW
633 SV *sv = NEWSV(85,0);
634
635 sv_upgrade(sv, SVt_PVMG);
3280af22 636 sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
57843af0 637 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
8990e307 638 }
463ee0b2 639 }
a687059c 640}
378cc40b 641
ffb4593c
NT
642/*
643 * S_check_uni
644 * Check the unary operators to ensure there's no ambiguity in how they're
645 * used. An ambiguous piece of code would be:
646 * rand + 5
647 * This doesn't mean rand() + 5. Because rand() is a unary operator,
648 * the +5 is its argument.
649 */
650
76e3520e 651STATIC void
cea2e8a9 652S_check_uni(pTHX)
ba106d47 653{
2f3197b3 654 char *s;
a0d0e21e 655 char *t;
2f3197b3 656
3280af22 657 if (PL_oldoldbufptr != PL_last_uni)
2f3197b3 658 return;
3280af22
NIS
659 while (isSPACE(*PL_last_uni))
660 PL_last_uni++;
7e2040f0 661 for (s = PL_last_uni; isALNUM_lazy_if(s,UTF) || *s == '-'; s++) ;
3280af22 662 if ((t = strchr(s, '(')) && t < PL_bufptr)
a0d0e21e 663 return;
0453d815 664 if (ckWARN_d(WARN_AMBIGUOUS)){
f248d071 665 char ch = *s;
0453d815 666 *s = '\0';
4e553d73
NIS
667 Perl_warner(aTHX_ WARN_AMBIGUOUS,
668 "Warning: Use of \"%s\" without parens is ambiguous",
0453d815
PM
669 PL_last_uni);
670 *s = ch;
671 }
2f3197b3
LW
672}
673
ffb4593c
NT
674/* workaround to replace the UNI() macro with a function. Only the
675 * hints/uts.sh file mentions this. Other comments elsewhere in the
676 * source indicate Microport Unix might need it too.
677 */
678
ffed7fef
LW
679#ifdef CRIPPLED_CC
680
681#undef UNI
ffed7fef 682#define UNI(f) return uni(f,s)
ffed7fef 683
76e3520e 684STATIC int
cea2e8a9 685S_uni(pTHX_ I32 f, char *s)
ffed7fef
LW
686{
687 yylval.ival = f;
3280af22
NIS
688 PL_expect = XTERM;
689 PL_bufptr = s;
8f872242
NIS
690 PL_last_uni = PL_oldbufptr;
691 PL_last_lop_op = f;
ffed7fef
LW
692 if (*s == '(')
693 return FUNC1;
694 s = skipspace(s);
695 if (*s == '(')
696 return FUNC1;
697 else
698 return UNIOP;
699}
700
a0d0e21e
LW
701#endif /* CRIPPLED_CC */
702
ffb4593c
NT
703/*
704 * LOP : macro to build a list operator. Its behaviour has been replaced
705 * with a subroutine, S_lop() for which LOP is just another name.
706 */
707
a0d0e21e
LW
708#define LOP(f,x) return lop(f,x,s)
709
ffb4593c
NT
710/*
711 * S_lop
712 * Build a list operator (or something that might be one). The rules:
713 * - if we have a next token, then it's a list operator [why?]
714 * - if the next thing is an opening paren, then it's a function
715 * - else it's a list operator
716 */
717
76e3520e 718STATIC I32
a0be28da 719S_lop(pTHX_ I32 f, int x, char *s)
ffed7fef 720{
79072805 721 yylval.ival = f;
35c8bce7 722 CLINE;
075953c3 723 REPORT("lop", f)
3280af22
NIS
724 PL_expect = x;
725 PL_bufptr = s;
726 PL_last_lop = PL_oldbufptr;
727 PL_last_lop_op = f;
728 if (PL_nexttoke)
a0d0e21e 729 return LSTOP;
79072805
LW
730 if (*s == '(')
731 return FUNC;
732 s = skipspace(s);
733 if (*s == '(')
734 return FUNC;
735 else
736 return LSTOP;
737}
738
ffb4593c
NT
739/*
740 * S_force_next
9cbb5ea2 741 * When the lexer realizes it knows the next token (for instance,
ffb4593c 742 * it is reordering tokens for the parser) then it can call S_force_next
9cbb5ea2
GS
743 * to know what token to return the next time the lexer is called. Caller
744 * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer
745 * handles the token correctly.
ffb4593c
NT
746 */
747
4e553d73 748STATIC void
cea2e8a9 749S_force_next(pTHX_ I32 type)
79072805 750{
3280af22
NIS
751 PL_nexttype[PL_nexttoke] = type;
752 PL_nexttoke++;
753 if (PL_lex_state != LEX_KNOWNEXT) {
754 PL_lex_defer = PL_lex_state;
755 PL_lex_expect = PL_expect;
756 PL_lex_state = LEX_KNOWNEXT;
79072805
LW
757 }
758}
759
ffb4593c
NT
760/*
761 * S_force_word
762 * When the lexer knows the next thing is a word (for instance, it has
763 * just seen -> and it knows that the next char is a word char, then
764 * it calls S_force_word to stick the next word into the PL_next lookahead.
765 *
766 * Arguments:
b1b65b59 767 * char *start : buffer position (must be within PL_linestr)
ffb4593c
NT
768 * int token : PL_next will be this type of bare word (e.g., METHOD,WORD)
769 * int check_keyword : if true, Perl checks to make sure the word isn't
770 * a keyword (do this if the word is a label, e.g. goto FOO)
771 * int allow_pack : if true, : characters will also be allowed (require,
772 * use, etc. do this)
9cbb5ea2 773 * int allow_initial_tick : used by the "sub" lexer only.
ffb4593c
NT
774 */
775
76e3520e 776STATIC char *
cea2e8a9 777S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
79072805 778{
463ee0b2
LW
779 register char *s;
780 STRLEN len;
4e553d73 781
463ee0b2
LW
782 start = skipspace(start);
783 s = start;
7e2040f0 784 if (isIDFIRST_lazy_if(s,UTF) ||
a0d0e21e 785 (allow_pack && *s == ':') ||
15f0808c 786 (allow_initial_tick && *s == '\'') )
a0d0e21e 787 {
3280af22
NIS
788 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
789 if (check_keyword && keyword(PL_tokenbuf, len))
463ee0b2
LW
790 return start;
791 if (token == METHOD) {
792 s = skipspace(s);
793 if (*s == '(')
3280af22 794 PL_expect = XTERM;
463ee0b2 795 else {
3280af22 796 PL_expect = XOPERATOR;
463ee0b2 797 }
79072805 798 }
3280af22
NIS
799 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
800 PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
79072805
LW
801 force_next(token);
802 }
803 return s;
804}
805
ffb4593c
NT
806/*
807 * S_force_ident
9cbb5ea2 808 * Called when the lexer wants $foo *foo &foo etc, but the program
ffb4593c
NT
809 * text only contains the "foo" portion. The first argument is a pointer
810 * to the "foo", and the second argument is the type symbol to prefix.
811 * Forces the next token to be a "WORD".
9cbb5ea2 812 * Creates the symbol if it didn't already exist (via gv_fetchpv()).
ffb4593c
NT
813 */
814
76e3520e 815STATIC void
cea2e8a9 816S_force_ident(pTHX_ register char *s, int kind)
79072805
LW
817{
818 if (s && *s) {
11343788 819 OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
3280af22 820 PL_nextval[PL_nexttoke].opval = o;
79072805 821 force_next(WORD);
748a9306 822 if (kind) {
11343788 823 o->op_private = OPpCONST_ENTERED;
55497cff 824 /* XXX see note in pp_entereval() for why we forgo typo
825 warnings if the symbol must be introduced in an eval.
826 GSAR 96-10-12 */
3280af22 827 gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
a0d0e21e
LW
828 kind == '$' ? SVt_PV :
829 kind == '@' ? SVt_PVAV :
830 kind == '%' ? SVt_PVHV :
831 SVt_PVGV
832 );
748a9306 833 }
79072805
LW
834 }
835}
836
1571675a
GS
837NV
838Perl_str_to_version(pTHX_ SV *sv)
839{
840 NV retval = 0.0;
841 NV nshift = 1.0;
842 STRLEN len;
843 char *start = SvPVx(sv,len);
3aa33fe5 844 bool utf = SvUTF8(sv) ? TRUE : FALSE;
1571675a
GS
845 char *end = start + len;
846 while (start < end) {
ba210ebe 847 STRLEN skip;
1571675a
GS
848 UV n;
849 if (utf)
9041c2e3 850 n = utf8n_to_uvchr((U8*)start, len, &skip, 0);
1571675a
GS
851 else {
852 n = *(U8*)start;
853 skip = 1;
854 }
855 retval += ((NV)n)/nshift;
856 start += skip;
857 nshift *= 1000;
858 }
859 return retval;
860}
861
4e553d73 862/*
ffb4593c
NT
863 * S_force_version
864 * Forces the next token to be a version number.
e759cc13
RGS
865 * If the next token appears to be an invalid version number, (e.g. "v2b"),
866 * and if "guessing" is TRUE, then no new token is created (and the caller
867 * must use an alternative parsing method).
ffb4593c
NT
868 */
869
76e3520e 870STATIC char *
e759cc13 871S_force_version(pTHX_ char *s, int guessing)
89bfa8cd 872{
873 OP *version = Nullop;
44dcb63b 874 char *d;
89bfa8cd 875
876 s = skipspace(s);
877
44dcb63b 878 d = s;
dd629d5b 879 if (*d == 'v')
44dcb63b 880 d++;
44dcb63b 881 if (isDIGIT(*d)) {
e759cc13
RGS
882 while (isDIGIT(*d) || *d == '_' || *d == '.')
883 d++;
9f3d182e 884 if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) {
dd629d5b 885 SV *ver;
b73d6f50 886 s = scan_num(s, &yylval);
89bfa8cd 887 version = yylval.opval;
dd629d5b
GS
888 ver = cSVOPx(version)->op_sv;
889 if (SvPOK(ver) && !SvNIOK(ver)) {
155aba94 890 (void)SvUPGRADE(ver, SVt_PVNV);
1571675a
GS
891 SvNVX(ver) = str_to_version(ver);
892 SvNOK_on(ver); /* hint that it is a version */
44dcb63b 893 }
89bfa8cd 894 }
e759cc13
RGS
895 else if (guessing)
896 return s;
89bfa8cd 897 }
898
899 /* NOTE: The parser sees the package name and the VERSION swapped */
3280af22 900 PL_nextval[PL_nexttoke].opval = version;
4e553d73 901 force_next(WORD);
89bfa8cd 902
e759cc13 903 return s;
89bfa8cd 904}
905
ffb4593c
NT
906/*
907 * S_tokeq
908 * Tokenize a quoted string passed in as an SV. It finds the next
909 * chunk, up to end of string or a backslash. It may make a new
910 * SV containing that chunk (if HINT_NEW_STRING is on). It also
911 * turns \\ into \.
912 */
913
76e3520e 914STATIC SV *
cea2e8a9 915S_tokeq(pTHX_ SV *sv)
79072805
LW
916{
917 register char *s;
918 register char *send;
919 register char *d;
b3ac6de7
IZ
920 STRLEN len = 0;
921 SV *pv = sv;
79072805
LW
922
923 if (!SvLEN(sv))
b3ac6de7 924 goto finish;
79072805 925
a0d0e21e 926 s = SvPV_force(sv, len);
21a311ee 927 if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1)
b3ac6de7 928 goto finish;
463ee0b2 929 send = s + len;
79072805
LW
930 while (s < send && *s != '\\')
931 s++;
932 if (s == send)
b3ac6de7 933 goto finish;
79072805 934 d = s;
be4731d2 935 if ( PL_hints & HINT_NEW_STRING ) {
79cb57f6 936 pv = sv_2mortal(newSVpvn(SvPVX(pv), len));
be4731d2
NIS
937 if (SvUTF8(sv))
938 SvUTF8_on(pv);
939 }
79072805
LW
940 while (s < send) {
941 if (*s == '\\') {
a0d0e21e 942 if (s + 1 < send && (s[1] == '\\'))
79072805
LW
943 s++; /* all that, just for this */
944 }
945 *d++ = *s++;
946 }
947 *d = '\0';
463ee0b2 948 SvCUR_set(sv, d - SvPVX(sv));
b3ac6de7 949 finish:
3280af22 950 if ( PL_hints & HINT_NEW_STRING )
b3ac6de7 951 return new_constant(NULL, 0, "q", sv, pv, "q");
79072805
LW
952 return sv;
953}
954
ffb4593c
NT
955/*
956 * Now come three functions related to double-quote context,
957 * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when
958 * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They
959 * interact with PL_lex_state, and create fake ( ... ) argument lists
960 * to handle functions and concatenation.
961 * They assume that whoever calls them will be setting up a fake
962 * join call, because each subthing puts a ',' after it. This lets
963 * "lower \luPpEr"
964 * become
965 * join($, , 'lower ', lcfirst( 'uPpEr', ) ,)
966 *
967 * (I'm not sure whether the spurious commas at the end of lcfirst's
968 * arguments and join's arguments are created or not).
969 */
970
971/*
972 * S_sublex_start
973 * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST).
974 *
975 * Pattern matching will set PL_lex_op to the pattern-matching op to
976 * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise).
977 *
978 * OP_CONST and OP_READLINE are easy--just make the new op and return.
979 *
980 * Everything else becomes a FUNC.
981 *
982 * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we
983 * had an OP_CONST or OP_READLINE). This just sets us up for a
984 * call to S_sublex_push().
985 */
986
76e3520e 987STATIC I32
cea2e8a9 988S_sublex_start(pTHX)
79072805
LW
989{
990 register I32 op_type = yylval.ival;
79072805
LW
991
992 if (op_type == OP_NULL) {
3280af22
NIS
993 yylval.opval = PL_lex_op;
994 PL_lex_op = Nullop;
79072805
LW
995 return THING;
996 }
997 if (op_type == OP_CONST || op_type == OP_READLINE) {
3280af22 998 SV *sv = tokeq(PL_lex_stuff);
b3ac6de7
IZ
999
1000 if (SvTYPE(sv) == SVt_PVIV) {
1001 /* Overloaded constants, nothing fancy: Convert to SVt_PV: */
1002 STRLEN len;
1003 char *p;
1004 SV *nsv;
1005
1006 p = SvPV(sv, len);
79cb57f6 1007 nsv = newSVpvn(p, len);
01ec43d0
GS
1008 if (SvUTF8(sv))
1009 SvUTF8_on(nsv);
b3ac6de7
IZ
1010 SvREFCNT_dec(sv);
1011 sv = nsv;
4e553d73 1012 }
b3ac6de7 1013 yylval.opval = (OP*)newSVOP(op_type, 0, sv);
3280af22 1014 PL_lex_stuff = Nullsv;
79072805
LW
1015 return THING;
1016 }
1017
3280af22
NIS
1018 PL_sublex_info.super_state = PL_lex_state;
1019 PL_sublex_info.sub_inwhat = op_type;
1020 PL_sublex_info.sub_op = PL_lex_op;
1021 PL_lex_state = LEX_INTERPPUSH;
55497cff 1022
3280af22
NIS
1023 PL_expect = XTERM;
1024 if (PL_lex_op) {
1025 yylval.opval = PL_lex_op;
1026 PL_lex_op = Nullop;
55497cff 1027 return PMFUNC;
1028 }
1029 else
1030 return FUNC;
1031}
1032
ffb4593c
NT
1033/*
1034 * S_sublex_push
1035 * Create a new scope to save the lexing state. The scope will be
1036 * ended in S_sublex_done. Returns a '(', starting the function arguments
1037 * to the uc, lc, etc. found before.
1038 * Sets PL_lex_state to LEX_INTERPCONCAT.
1039 */
1040
76e3520e 1041STATIC I32
cea2e8a9 1042S_sublex_push(pTHX)
55497cff 1043{
f46d017c 1044 ENTER;
55497cff 1045
3280af22
NIS
1046 PL_lex_state = PL_sublex_info.super_state;
1047 SAVEI32(PL_lex_dojoin);
1048 SAVEI32(PL_lex_brackets);
3280af22
NIS
1049 SAVEI32(PL_lex_casemods);
1050 SAVEI32(PL_lex_starts);
1051 SAVEI32(PL_lex_state);
7766f137 1052 SAVEVPTR(PL_lex_inpat);
3280af22 1053 SAVEI32(PL_lex_inwhat);
57843af0 1054 SAVECOPLINE(PL_curcop);
3280af22 1055 SAVEPPTR(PL_bufptr);
8452ff4b 1056 SAVEPPTR(PL_bufend);
3280af22
NIS
1057 SAVEPPTR(PL_oldbufptr);
1058 SAVEPPTR(PL_oldoldbufptr);
207e3d1a
JH
1059 SAVEPPTR(PL_last_lop);
1060 SAVEPPTR(PL_last_uni);
3280af22
NIS
1061 SAVEPPTR(PL_linestart);
1062 SAVESPTR(PL_linestr);
1063 SAVEPPTR(PL_lex_brackstack);
1064 SAVEPPTR(PL_lex_casestack);
1065
1066 PL_linestr = PL_lex_stuff;
1067 PL_lex_stuff = Nullsv;
1068
9cbb5ea2
GS
1069 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart
1070 = SvPVX(PL_linestr);
3280af22 1071 PL_bufend += SvCUR(PL_linestr);
207e3d1a 1072 PL_last_lop = PL_last_uni = Nullch;
3280af22
NIS
1073 SAVEFREESV(PL_linestr);
1074
1075 PL_lex_dojoin = FALSE;
1076 PL_lex_brackets = 0;
3280af22
NIS
1077 New(899, PL_lex_brackstack, 120, char);
1078 New(899, PL_lex_casestack, 12, char);
1079 SAVEFREEPV(PL_lex_brackstack);
1080 SAVEFREEPV(PL_lex_casestack);
1081 PL_lex_casemods = 0;
1082 *PL_lex_casestack = '\0';
1083 PL_lex_starts = 0;
1084 PL_lex_state = LEX_INTERPCONCAT;
57843af0 1085 CopLINE_set(PL_curcop, PL_multi_start);
3280af22
NIS
1086
1087 PL_lex_inwhat = PL_sublex_info.sub_inwhat;
1088 if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
1089 PL_lex_inpat = PL_sublex_info.sub_op;
79072805 1090 else
3280af22 1091 PL_lex_inpat = Nullop;
79072805 1092
55497cff 1093 return '(';
79072805
LW
1094}
1095
ffb4593c
NT
1096/*
1097 * S_sublex_done
1098 * Restores lexer state after a S_sublex_push.
1099 */
1100
76e3520e 1101STATIC I32
cea2e8a9 1102S_sublex_done(pTHX)
79072805 1103{
3280af22 1104 if (!PL_lex_starts++) {
9aa983d2
JH
1105 SV *sv = newSVpvn("",0);
1106 if (SvUTF8(PL_linestr))
1107 SvUTF8_on(sv);
3280af22 1108 PL_expect = XOPERATOR;
9aa983d2 1109 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
79072805
LW
1110 return THING;
1111 }
1112
3280af22
NIS
1113 if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
1114 PL_lex_state = LEX_INTERPCASEMOD;
cea2e8a9 1115 return yylex();
79072805
LW
1116 }
1117
ffb4593c 1118 /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */
3280af22
NIS
1119 if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
1120 PL_linestr = PL_lex_repl;
1121 PL_lex_inpat = 0;
1122 PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
1123 PL_bufend += SvCUR(PL_linestr);
207e3d1a 1124 PL_last_lop = PL_last_uni = Nullch;
3280af22
NIS
1125 SAVEFREESV(PL_linestr);
1126 PL_lex_dojoin = FALSE;
1127 PL_lex_brackets = 0;
3280af22
NIS
1128 PL_lex_casemods = 0;
1129 *PL_lex_casestack = '\0';
1130 PL_lex_starts = 0;
25da4f38 1131 if (SvEVALED(PL_lex_repl)) {
3280af22
NIS
1132 PL_lex_state = LEX_INTERPNORMAL;
1133 PL_lex_starts++;
e9fa98b2
HS
1134 /* we don't clear PL_lex_repl here, so that we can check later
1135 whether this is an evalled subst; that means we rely on the
1136 logic to ensure sublex_done() is called again only via the
1137 branch (in yylex()) that clears PL_lex_repl, else we'll loop */
79072805 1138 }
e9fa98b2 1139 else {
3280af22 1140 PL_lex_state = LEX_INTERPCONCAT;
e9fa98b2
HS
1141 PL_lex_repl = Nullsv;
1142 }
79072805 1143 return ',';
ffed7fef
LW
1144 }
1145 else {
f46d017c 1146 LEAVE;
3280af22
NIS
1147 PL_bufend = SvPVX(PL_linestr);
1148 PL_bufend += SvCUR(PL_linestr);
1149 PL_expect = XOPERATOR;
09bef843 1150 PL_sublex_info.sub_inwhat = 0;
79072805 1151 return ')';
ffed7fef
LW
1152 }
1153}
1154
02aa26ce
NT
1155/*
1156 scan_const
1157
1158 Extracts a pattern, double-quoted string, or transliteration. This
1159 is terrifying code.
1160
3280af22
NIS
1161 It looks at lex_inwhat and PL_lex_inpat to find out whether it's
1162 processing a pattern (PL_lex_inpat is true), a transliteration
02aa26ce
NT
1163 (lex_inwhat & OP_TRANS is true), or a double-quoted string.
1164
9b599b2a
GS
1165 Returns a pointer to the character scanned up to. Iff this is
1166 advanced from the start pointer supplied (ie if anything was
1167 successfully parsed), will leave an OP for the substring scanned
1168 in yylval. Caller must intuit reason for not parsing further
1169 by looking at the next characters herself.
1170
02aa26ce
NT
1171 In patterns:
1172 backslashes:
1173 double-quoted style: \r and \n
1174 regexp special ones: \D \s
1175 constants: \x3
1176 backrefs: \1 (deprecated in substitution replacements)
1177 case and quoting: \U \Q \E
1178 stops on @ and $, but not for $ as tail anchor
1179
1180 In transliterations:
1181 characters are VERY literal, except for - not at the start or end
1182 of the string, which indicates a range. scan_const expands the
1183 range to the full set of intermediate characters.
1184
1185 In double-quoted strings:
1186 backslashes:
1187 double-quoted style: \r and \n
1188 constants: \x3
1189 backrefs: \1 (deprecated)
1190 case and quoting: \U \Q \E
1191 stops on @ and $
1192
1193 scan_const does *not* construct ops to handle interpolated strings.
1194 It stops processing as soon as it finds an embedded $ or @ variable
1195 and leaves it to the caller to work out what's going on.
1196
1197 @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
1198
1199 $ in pattern could be $foo or could be tail anchor. Assumption:
1200 it's a tail anchor if $ is the last thing in the string, or if it's
1201 followed by one of ")| \n\t"
1202
1203 \1 (backreferences) are turned into $1
1204
1205 The structure of the code is
1206 while (there's a character to process) {
1207 handle transliteration ranges
1208 skip regexp comments
1209 skip # initiated comments in //x patterns
1210 check for embedded @foo
1211 check for embedded scalars
1212 if (backslash) {
1213 leave intact backslashes from leave (below)
1214 deprecate \1 in strings and sub replacements
1215 handle string-changing backslashes \l \U \Q \E, etc.
1216 switch (what was escaped) {
1217 handle - in a transliteration (becomes a literal -)
1218 handle \132 octal characters
1219 handle 0x15 hex characters
1220 handle \cV (control V)
1221 handle printf backslashes (\f, \r, \n, etc)
1222 } (end switch)
1223 } (end if backslash)
1224 } (end while character to read)
4e553d73 1225
02aa26ce
NT
1226*/
1227
76e3520e 1228STATIC char *
cea2e8a9 1229S_scan_const(pTHX_ char *start)
79072805 1230{
3280af22 1231 register char *send = PL_bufend; /* end of the constant */
02aa26ce
NT
1232 SV *sv = NEWSV(93, send - start); /* sv for the constant */
1233 register char *s = start; /* start of the constant */
1234 register char *d = SvPVX(sv); /* destination for copies */
1235 bool dorange = FALSE; /* are we in a translit range? */
c2e66d9e 1236 bool didrange = FALSE; /* did we just finish a range? */
2b9d42f0
NIS
1237 I32 has_utf8 = FALSE; /* Output constant is UTF8 */
1238 I32 this_utf8 = UTF; /* The source string is assumed to be UTF8 */
012bcf8d
GS
1239 UV uv;
1240
dff6d3cd 1241 const char *leaveit = /* set of acceptably-backslashed characters */
3280af22 1242 PL_lex_inpat
4a2d328f 1243 ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
9b599b2a 1244 : "";
79072805 1245
2b9d42f0
NIS
1246 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1247 /* If we are doing a trans and we know we want UTF8 set expectation */
1248 has_utf8 = PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF);
1249 this_utf8 = PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1250 }
1251
1252
79072805 1253 while (s < send || dorange) {
02aa26ce 1254 /* get transliterations out of the way (they're most literal) */
3280af22 1255 if (PL_lex_inwhat == OP_TRANS) {
02aa26ce 1256 /* expand a range A-Z to the full set of characters. AIE! */
79072805 1257 if (dorange) {
1ba5c669
JH
1258 I32 i; /* current expanded character */
1259 I32 min; /* first character in range */
1260 I32 max; /* last character in range */
02aa26ce 1261
2b9d42f0 1262 if (has_utf8) {
8973db79
JH
1263 char *c = (char*)utf8_hop((U8*)d, -1);
1264 char *e = d++;
1265 while (e-- > c)
1266 *(e + 1) = *e;
25716404 1267 *c = (char)UTF_TO_NATIVE(0xff);
8973db79
JH
1268 /* mark the range as done, and continue */
1269 dorange = FALSE;
1270 didrange = TRUE;
1271 continue;
1272 }
2b9d42f0 1273
02aa26ce 1274 i = d - SvPVX(sv); /* remember current offset */
9cbb5ea2
GS
1275 SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */
1276 d = SvPVX(sv) + i; /* refresh d after realloc */
02aa26ce
NT
1277 d -= 2; /* eat the first char and the - */
1278
8ada0baa
JH
1279 min = (U8)*d; /* first char in range */
1280 max = (U8)d[1]; /* last char in range */
1281
c2e66d9e 1282 if (min > max) {
01ec43d0 1283 Perl_croak(aTHX_
1ba5c669
JH
1284 "Invalid [] range \"%c-%c\" in transliteration operator",
1285 (char)min, (char)max);
c2e66d9e
GS
1286 }
1287
c7f1f016 1288#ifdef EBCDIC
8ada0baa
JH
1289 if ((isLOWER(min) && isLOWER(max)) ||
1290 (isUPPER(min) && isUPPER(max))) {
1291 if (isLOWER(min)) {
1292 for (i = min; i <= max; i++)
1293 if (isLOWER(i))
db42d148 1294 *d++ = NATIVE_TO_NEED(has_utf8,i);
8ada0baa
JH
1295 } else {
1296 for (i = min; i <= max; i++)
1297 if (isUPPER(i))
db42d148 1298 *d++ = NATIVE_TO_NEED(has_utf8,i);
8ada0baa
JH
1299 }
1300 }
1301 else
1302#endif
1303 for (i = min; i <= max; i++)
1304 *d++ = i;
02aa26ce
NT
1305
1306 /* mark the range as done, and continue */
79072805 1307 dorange = FALSE;
01ec43d0 1308 didrange = TRUE;
79072805 1309 continue;
4e553d73 1310 }
02aa26ce
NT
1311
1312 /* range begins (ignore - as first or last char) */
79072805 1313 else if (*s == '-' && s+1 < send && s != start) {
4e553d73 1314 if (didrange) {
1fafa243 1315 Perl_croak(aTHX_ "Ambiguous range in transliteration operator");
01ec43d0 1316 }
2b9d42f0 1317 if (has_utf8) {
25716404 1318 *d++ = (char)UTF_TO_NATIVE(0xff); /* use illegal utf8 byte--see pmtrans */
a0ed51b3
LW
1319 s++;
1320 continue;
1321 }
79072805
LW
1322 dorange = TRUE;
1323 s++;
01ec43d0
GS
1324 }
1325 else {
1326 didrange = FALSE;
1327 }
79072805 1328 }
02aa26ce
NT
1329
1330 /* if we get here, we're not doing a transliteration */
1331
0f5d15d6
IZ
1332 /* skip for regexp comments /(?#comment)/ and code /(?{code})/,
1333 except for the last char, which will be done separately. */
3280af22 1334 else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
cc6b7395
IZ
1335 if (s[2] == '#') {
1336 while (s < send && *s != ')')
db42d148 1337 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
155aba94
GS
1338 }
1339 else if (s[2] == '{' /* This should match regcomp.c */
1340 || ((s[2] == 'p' || s[2] == '?') && s[3] == '{'))
1341 {
cc6b7395 1342 I32 count = 1;
0f5d15d6 1343 char *regparse = s + (s[2] == '{' ? 3 : 4);
cc6b7395
IZ
1344 char c;
1345
d9f97599
GS
1346 while (count && (c = *regparse)) {
1347 if (c == '\\' && regparse[1])
1348 regparse++;
4e553d73 1349 else if (c == '{')
cc6b7395 1350 count++;
4e553d73 1351 else if (c == '}')
cc6b7395 1352 count--;
d9f97599 1353 regparse++;
cc6b7395 1354 }
5bdf89e7
IZ
1355 if (*regparse != ')') {
1356 regparse--; /* Leave one char for continuation. */
cc6b7395 1357 yyerror("Sequence (?{...}) not terminated or not {}-balanced");
5bdf89e7 1358 }
0f5d15d6 1359 while (s < regparse)
db42d148 1360 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
cc6b7395 1361 }
748a9306 1362 }
02aa26ce
NT
1363
1364 /* likewise skip #-initiated comments in //x patterns */
3280af22
NIS
1365 else if (*s == '#' && PL_lex_inpat &&
1366 ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
748a9306 1367 while (s+1 < send && *s != '\n')
db42d148 1368 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
748a9306 1369 }
02aa26ce 1370
5d1d4326
JH
1371 /* check for embedded arrays
1372 (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
1373 */
7e2040f0 1374 else if (*s == '@' && s[1]
5d1d4326 1375 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
79072805 1376 break;
02aa26ce
NT
1377
1378 /* check for embedded scalars. only stop if we're sure it's a
1379 variable.
1380 */
79072805 1381 else if (*s == '$') {
3280af22 1382 if (!PL_lex_inpat) /* not a regexp, so $ must be var */
79072805 1383 break;
6002328a 1384 if (s + 1 < send && !strchr("()| \r\n\t", s[1]))
79072805
LW
1385 break; /* in regexp, $ might be tail anchor */
1386 }
02aa26ce 1387
2b9d42f0
NIS
1388 /* End of else if chain - OP_TRANS rejoin rest */
1389
02aa26ce 1390 /* backslashes */
79072805
LW
1391 if (*s == '\\' && s+1 < send) {
1392 s++;
02aa26ce
NT
1393
1394 /* some backslashes we leave behind */
c9f97d15 1395 if (*leaveit && *s && strchr(leaveit, *s)) {
db42d148
NIS
1396 *d++ = NATIVE_TO_NEED(has_utf8,'\\');
1397 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
79072805
LW
1398 continue;
1399 }
02aa26ce
NT
1400
1401 /* deprecate \1 in strings and substitution replacements */
3280af22 1402 if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
a0d0e21e 1403 isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
79072805 1404 {
599cee73 1405 if (ckWARN(WARN_SYNTAX))
cea2e8a9 1406 Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
79072805
LW
1407 *--s = '$';
1408 break;
1409 }
02aa26ce
NT
1410
1411 /* string-change backslash escapes */
3280af22 1412 if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
79072805
LW
1413 --s;
1414 break;
1415 }
02aa26ce
NT
1416
1417 /* if we get here, it's either a quoted -, or a digit */
79072805 1418 switch (*s) {
02aa26ce
NT
1419
1420 /* quoted - in transliterations */
79072805 1421 case '-':
3280af22 1422 if (PL_lex_inwhat == OP_TRANS) {
79072805
LW
1423 *d++ = *s++;
1424 continue;
1425 }
1426 /* FALL THROUGH */
1427 default:
11b8faa4 1428 {
7e84c16c 1429 if (ckWARN(WARN_MISC) && isALNUM(*s))
4e553d73 1430 Perl_warner(aTHX_ WARN_MISC,
11b8faa4
JH
1431 "Unrecognized escape \\%c passed through",
1432 *s);
1433 /* default action is to copy the quoted character */
f9a63242 1434 goto default_action;
11b8faa4 1435 }
02aa26ce
NT
1436
1437 /* \132 indicates an octal constant */
79072805
LW
1438 case '0': case '1': case '2': case '3':
1439 case '4': case '5': case '6': case '7':
ba210ebe 1440 {
53305cf1
NC
1441 I32 flags = 0;
1442 STRLEN len = 3;
1443 uv = grok_oct(s, &len, &flags, NULL);
ba210ebe
JH
1444 s += len;
1445 }
012bcf8d 1446 goto NUM_ESCAPE_INSERT;
02aa26ce
NT
1447
1448 /* \x24 indicates a hex constant */
79072805 1449 case 'x':
a0ed51b3
LW
1450 ++s;
1451 if (*s == '{') {
1452 char* e = strchr(s, '}');
a4c04bdc
NC
1453 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
1454 PERL_SCAN_DISALLOW_PREFIX;
53305cf1 1455 STRLEN len;
355860ce 1456
53305cf1 1457 ++s;
adaeee49 1458 if (!e) {
a0ed51b3 1459 yyerror("Missing right brace on \\x{}");
355860ce 1460 continue;
ba210ebe 1461 }
53305cf1
NC
1462 len = e - s;
1463 uv = grok_hex(s, &len, &flags, NULL);
ba210ebe 1464 s = e + 1;
a0ed51b3
LW
1465 }
1466 else {
ba210ebe 1467 {
53305cf1 1468 STRLEN len = 2;
a4c04bdc 1469 I32 flags = PERL_SCAN_DISALLOW_PREFIX;
53305cf1 1470 uv = grok_hex(s, &len, &flags, NULL);
ba210ebe
JH
1471 s += len;
1472 }
012bcf8d
GS
1473 }
1474
1475 NUM_ESCAPE_INSERT:
1476 /* Insert oct or hex escaped character.
301d3d20 1477 * There will always enough room in sv since such
db42d148 1478 * escapes will be longer than any UTF-8 sequence
301d3d20 1479 * they can end up as. */
ba7cea30 1480
c7f1f016
NIS
1481 /* We need to map to chars to ASCII before doing the tests
1482 to cover EBCDIC
1483 */
c4d5f83a 1484 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(uv))) {
9aa983d2 1485 if (!has_utf8 && uv > 255) {
301d3d20
JH
1486 /* Might need to recode whatever we have
1487 * accumulated so far if it contains any
1488 * hibit chars.
1489 *
1490 * (Can't we keep track of that and avoid
1491 * this rescan? --jhi)
012bcf8d 1492 */
c7f1f016 1493 int hicount = 0;
63cd0674
NIS
1494 U8 *c;
1495 for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) {
c4d5f83a 1496 if (!NATIVE_IS_INVARIANT(*c)) {
012bcf8d 1497 hicount++;
db42d148 1498 }
012bcf8d 1499 }
63cd0674 1500 if (hicount) {
db42d148
NIS
1501 STRLEN offset = d - SvPVX(sv);
1502 U8 *src, *dst;
1503 d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset;
1504 src = (U8 *)d - 1;
1505 dst = src+hicount;
1506 d += hicount;
1507 while (src >= (U8 *)SvPVX(sv)) {
c4d5f83a 1508 if (!NATIVE_IS_INVARIANT(*src)) {
63cd0674 1509 U8 ch = NATIVE_TO_ASCII(*src);
db42d148
NIS
1510 *dst-- = UTF8_EIGHT_BIT_LO(ch);
1511 *dst-- = UTF8_EIGHT_BIT_HI(ch);
012bcf8d
GS
1512 }
1513 else {
63cd0674 1514 *dst-- = *src;
012bcf8d 1515 }
c7f1f016 1516 src--;
012bcf8d
GS
1517 }
1518 }
1519 }
1520
9aa983d2 1521 if (has_utf8 || uv > 255) {
9041c2e3 1522 d = (char*)uvchr_to_utf8((U8*)d, uv);
4e553d73 1523 has_utf8 = TRUE;
f9a63242
JH
1524 if (PL_lex_inwhat == OP_TRANS &&
1525 PL_sublex_info.sub_op) {
1526 PL_sublex_info.sub_op->op_private |=
1527 (PL_lex_repl ? OPpTRANS_FROM_UTF
1528 : OPpTRANS_TO_UTF);
f9a63242 1529 }
012bcf8d 1530 }
a0ed51b3 1531 else {
012bcf8d 1532 *d++ = (char)uv;
a0ed51b3 1533 }
012bcf8d
GS
1534 }
1535 else {
c4d5f83a 1536 *d++ = (char) uv;
a0ed51b3 1537 }
79072805 1538 continue;
02aa26ce 1539
4a2d328f
IZ
1540 /* \N{latin small letter a} is a named character */
1541 case 'N':
55eda711 1542 ++s;
423cee85
JH
1543 if (*s == '{') {
1544 char* e = strchr(s, '}');
155aba94 1545 SV *res;
423cee85
JH
1546 STRLEN len;
1547 char *str;
4e553d73 1548
423cee85 1549 if (!e) {
5777a3f7 1550 yyerror("Missing right brace on \\N{}");
423cee85
JH
1551 e = s - 1;
1552 goto cont_scan;
1553 }
55eda711
JH
1554 res = newSVpvn(s + 1, e - s - 1);
1555 res = new_constant( Nullch, 0, "charnames",
1556 res, Nullsv, "\\N{...}" );
f9a63242
JH
1557 if (has_utf8)
1558 sv_utf8_upgrade(res);
423cee85 1559 str = SvPV(res,len);
89491803 1560 if (!has_utf8 && SvUTF8(res)) {
f08d6ad9
GS
1561 char *ostart = SvPVX(sv);
1562 SvCUR_set(sv, d - ostart);
1563 SvPOK_on(sv);
e4f3eed8 1564 *d = '\0';
f08d6ad9 1565 sv_utf8_upgrade(sv);
d2f449dd
SB
1566 /* this just broke our allocation above... */
1567 SvGROW(sv, send - start);
f08d6ad9 1568 d = SvPVX(sv) + SvCUR(sv);
89491803 1569 has_utf8 = TRUE;
f08d6ad9 1570 }
423cee85
JH
1571 if (len > e - s + 4) {
1572 char *odest = SvPVX(sv);
1573
8973db79 1574 SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
423cee85
JH
1575 d = SvPVX(sv) + (d - odest);
1576 }
1577 Copy(str, d, len, char);
1578 d += len;
1579 SvREFCNT_dec(res);
1580 cont_scan:
1581 s = e + 1;
1582 }
1583 else
5777a3f7 1584 yyerror("Missing braces on \\N{}");
423cee85
JH
1585 continue;
1586
02aa26ce 1587 /* \c is a control character */
79072805
LW
1588 case 'c':
1589 s++;
ba210ebe
JH
1590 {
1591 U8 c = *s++;
c7f1f016
NIS
1592#ifdef EBCDIC
1593 if (isLOWER(c))
1594 c = toUPPER(c);
1595#endif
db42d148 1596 *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
ba210ebe 1597 }
79072805 1598 continue;
02aa26ce
NT
1599
1600 /* printf-style backslashes, formfeeds, newlines, etc */
79072805 1601 case 'b':
db42d148 1602 *d++ = NATIVE_TO_NEED(has_utf8,'\b');
79072805
LW
1603 break;
1604 case 'n':
db42d148 1605 *d++ = NATIVE_TO_NEED(has_utf8,'\n');
79072805
LW
1606 break;
1607 case 'r':
db42d148 1608 *d++ = NATIVE_TO_NEED(has_utf8,'\r');
79072805
LW
1609 break;
1610 case 'f':
db42d148 1611 *d++ = NATIVE_TO_NEED(has_utf8,'\f');
79072805
LW
1612 break;
1613 case 't':
db42d148 1614 *d++ = NATIVE_TO_NEED(has_utf8,'\t');
79072805 1615 break;
34a3fe2a 1616 case 'e':
db42d148 1617 *d++ = ASCII_TO_NEED(has_utf8,'\033');
34a3fe2a
PP
1618 break;
1619 case 'a':
db42d148 1620 *d++ = ASCII_TO_NEED(has_utf8,'\007');
79072805 1621 break;
02aa26ce
NT
1622 } /* end switch */
1623
79072805
LW
1624 s++;
1625 continue;
02aa26ce
NT
1626 } /* end if (backslash) */
1627
f9a63242 1628 default_action:
2b9d42f0
NIS
1629 /* If we started with encoded form, or already know we want it
1630 and then encode the next character */
1631 if ((has_utf8 || this_utf8) && !NATIVE_IS_INVARIANT((U8)(*s))) {
1632 STRLEN len = 1;
1633 UV uv = (this_utf8) ? utf8n_to_uvchr((U8*)s, send - s, &len, 0) : (UV) ((U8) *s);
1634 STRLEN need = UNISKIP(NATIVE_TO_UNI(uv));
1635 s += len;
1636 if (need > len) {
1637 /* encoded value larger than old, need extra space (NOTE: SvCUR() not set here) */
1638 STRLEN off = d - SvPVX(sv);
1639 d = SvGROW(sv, SvLEN(sv) + (need-len)) + off;
1640 }
1641 d = (char*)uvchr_to_utf8((U8*)d, uv);
1642 has_utf8 = TRUE;
1643 }
1644 else {
1645 *d++ = NATIVE_TO_NEED(has_utf8,*s++);
1646 }
02aa26ce
NT
1647 } /* while loop to process each character */
1648
1649 /* terminate the string and set up the sv */
79072805 1650 *d = '\0';
463ee0b2 1651 SvCUR_set(sv, d - SvPVX(sv));
2b9d42f0 1652 if (SvCUR(sv) >= SvLEN(sv))
585602fa 1653 Perl_croak(aTHX_ "panic: constant overflowed allocated space");
2b9d42f0 1654
79072805 1655 SvPOK_on(sv);
2b9d42f0 1656 if (has_utf8) {
7e2040f0 1657 SvUTF8_on(sv);
2b9d42f0
NIS
1658 if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
1659 PL_sublex_info.sub_op->op_private |=
1660 (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
1661 }
1662 }
79072805 1663
02aa26ce 1664 /* shrink the sv if we allocated more than we used */
79072805
LW
1665 if (SvCUR(sv) + 5 < SvLEN(sv)) {
1666 SvLEN_set(sv, SvCUR(sv) + 1);
463ee0b2 1667 Renew(SvPVX(sv), SvLEN(sv), char);
79072805 1668 }
02aa26ce 1669
9b599b2a 1670 /* return the substring (via yylval) only if we parsed anything */
3280af22
NIS
1671 if (s > PL_bufptr) {
1672 if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
4e553d73 1673 sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
b3ac6de7 1674 sv, Nullsv,
4e553d73 1675 ( PL_lex_inwhat == OP_TRANS
b3ac6de7 1676 ? "tr"
3280af22 1677 : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
b3ac6de7
IZ
1678 ? "s"
1679 : "qq")));
79072805 1680 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
b3ac6de7 1681 } else
8990e307 1682 SvREFCNT_dec(sv);
79072805
LW
1683 return s;
1684}
1685
ffb4593c
NT
1686/* S_intuit_more
1687 * Returns TRUE if there's more to the expression (e.g., a subscript),
1688 * FALSE otherwise.
ffb4593c
NT
1689 *
1690 * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/
1691 *
1692 * ->[ and ->{ return TRUE
1693 * { and [ outside a pattern are always subscripts, so return TRUE
1694 * if we're outside a pattern and it's not { or [, then return FALSE
1695 * if we're in a pattern and the first char is a {
1696 * {4,5} (any digits around the comma) returns FALSE
1697 * if we're in a pattern and the first char is a [
1698 * [] returns FALSE
1699 * [SOMETHING] has a funky algorithm to decide whether it's a
1700 * character class or not. It has to deal with things like
1701 * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/
1702 * anything else returns TRUE
1703 */
1704
9cbb5ea2
GS
1705/* This is the one truly awful dwimmer necessary to conflate C and sed. */
1706
76e3520e 1707STATIC int
cea2e8a9 1708S_intuit_more(pTHX_ register char *s)
79072805 1709{
3280af22 1710 if (PL_lex_brackets)
79072805
LW
1711 return TRUE;
1712 if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
1713 return TRUE;
1714 if (*s != '{' && *s != '[')
1715 return FALSE;
3280af22 1716 if (!PL_lex_inpat)
79072805
LW
1717 return TRUE;
1718
1719 /* In a pattern, so maybe we have {n,m}. */
1720 if (*s == '{') {
1721 s++;
1722 if (!isDIGIT(*s))
1723 return TRUE;
1724 while (isDIGIT(*s))
1725 s++;
1726 if (*s == ',')
1727 s++;
1728 while (isDIGIT(*s))
1729 s++;
1730 if (*s == '}')
1731 return FALSE;
1732 return TRUE;
1733
1734 }
1735
1736 /* On the other hand, maybe we have a character class */
1737
1738 s++;
1739 if (*s == ']' || *s == '^')
1740 return FALSE;
1741 else {
ffb4593c 1742 /* this is terrifying, and it works */
79072805
LW
1743 int weight = 2; /* let's weigh the evidence */
1744 char seen[256];
f27ffc4a 1745 unsigned char un_char = 255, last_un_char;
93a17b20 1746 char *send = strchr(s,']');
3280af22 1747 char tmpbuf[sizeof PL_tokenbuf * 4];
79072805
LW
1748
1749 if (!send) /* has to be an expression */
1750 return TRUE;
1751
1752 Zero(seen,256,char);
1753 if (*s == '$')
1754 weight -= 3;
1755 else if (isDIGIT(*s)) {
1756 if (s[1] != ']') {
1757 if (isDIGIT(s[1]) && s[2] == ']')
1758 weight -= 10;
1759 }
1760 else
1761 weight -= 100;
1762 }
1763 for (; s < send; s++) {
1764 last_un_char = un_char;
1765 un_char = (unsigned char)*s;
1766 switch (*s) {
1767 case '@':
1768 case '&':
1769 case '$':
1770 weight -= seen[un_char] * 10;
7e2040f0 1771 if (isALNUM_lazy_if(s+1,UTF)) {
8903cb82 1772 scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
a0d0e21e 1773 if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
79072805
LW
1774 weight -= 100;
1775 else
1776 weight -= 10;
1777 }
1778 else if (*s == '$' && s[1] &&
93a17b20
LW
1779 strchr("[#!%*<>()-=",s[1])) {
1780 if (/*{*/ strchr("])} =",s[2]))
79072805
LW
1781 weight -= 10;
1782 else
1783 weight -= 1;
1784 }
1785 break;
1786 case '\\':
1787 un_char = 254;
1788 if (s[1]) {
93a17b20 1789 if (strchr("wds]",s[1]))
79072805
LW
1790 weight += 100;
1791 else if (seen['\''] || seen['"'])
1792 weight += 1;
93a17b20 1793 else if (strchr("rnftbxcav",s[1]))
79072805
LW
1794 weight += 40;
1795 else if (isDIGIT(s[1])) {
1796 weight += 40;
1797 while (s[1] && isDIGIT(s[1]))
1798 s++;
1799 }
1800 }
1801 else
1802 weight += 100;
1803 break;
1804 case '-':
1805 if (s[1] == '\\')
1806 weight += 50;
93a17b20 1807 if (strchr("aA01! ",last_un_char))
79072805 1808 weight += 30;
93a17b20 1809 if (strchr("zZ79~",s[1]))
79072805 1810 weight += 30;
f27ffc4a
GS
1811 if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
1812 weight -= 5; /* cope with negative subscript */
79072805
LW
1813 break;
1814 default:
93a17b20 1815 if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
79072805
LW
1816 isALPHA(*s) && s[1] && isALPHA(s[1])) {
1817 char *d = tmpbuf;
1818 while (isALPHA(*s))
1819 *d++ = *s++;
1820 *d = '\0';
1821 if (keyword(tmpbuf, d - tmpbuf))
1822 weight -= 150;
1823 }
1824 if (un_char == last_un_char + 1)
1825 weight += 5;
1826 weight -= seen[un_char];
1827 break;
1828 }
1829 seen[un_char]++;
1830 }
1831 if (weight >= 0) /* probably a character class */
1832 return FALSE;
1833 }
1834
1835 return TRUE;
1836}
ffed7fef 1837
ffb4593c
NT
1838/*
1839 * S_intuit_method
1840 *
1841 * Does all the checking to disambiguate
1842 * foo bar
1843 * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise
1844 * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args).
1845 *
1846 * First argument is the stuff after the first token, e.g. "bar".
1847 *
1848 * Not a method if bar is a filehandle.
1849 * Not a method if foo is a subroutine prototyped to take a filehandle.
1850 * Not a method if it's really "Foo $bar"
1851 * Method if it's "foo $bar"
1852 * Not a method if it's really "print foo $bar"
1853 * Method if it's really "foo package::" (interpreted as package->foo)
1854 * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
3cb0bbe5 1855 * Not a method if bar is a filehandle or package, but is quoted with
ffb4593c
NT
1856 * =>
1857 */
1858
76e3520e 1859STATIC int
cea2e8a9 1860S_intuit_method(pTHX_ char *start, GV *gv)
a0d0e21e
LW
1861{
1862 char *s = start + (*start == '$');
3280af22 1863 char tmpbuf[sizeof PL_tokenbuf];
a0d0e21e
LW
1864 STRLEN len;
1865 GV* indirgv;
1866
1867 if (gv) {
b6c543e3 1868 CV *cv;
a0d0e21e
LW
1869 if (GvIO(gv))
1870 return 0;
b6c543e3
IZ
1871 if ((cv = GvCVu(gv))) {
1872 char *proto = SvPVX(cv);
1873 if (proto) {
1874 if (*proto == ';')
1875 proto++;
1876 if (*proto == '*')
1877 return 0;
1878 }
1879 } else
a0d0e21e
LW
1880 gv = 0;
1881 }
8903cb82 1882 s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
ffb4593c
NT
1883 /* start is the beginning of the possible filehandle/object,
1884 * and s is the end of it
1885 * tmpbuf is a copy of it
1886 */
1887
a0d0e21e 1888 if (*start == '$') {
3280af22 1889 if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
a0d0e21e
LW
1890 return 0;
1891 s = skipspace(s);
3280af22
NIS
1892 PL_bufptr = start;
1893 PL_expect = XREF;
a0d0e21e
LW
1894 return *s == '(' ? FUNCMETH : METHOD;
1895 }
1896 if (!keyword(tmpbuf, len)) {
c3e0f903
GS
1897 if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
1898 len -= 2;
1899 tmpbuf[len] = '\0';
1900 goto bare_package;
1901 }
1902 indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
8ebc5c01 1903 if (indirgv && GvCVu(indirgv))
a0d0e21e
LW
1904 return 0;
1905 /* filehandle or package name makes it a method */
89bfa8cd 1906 if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
a0d0e21e 1907 s = skipspace(s);
3280af22 1908 if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
55497cff 1909 return 0; /* no assumptions -- "=>" quotes bearword */
c3e0f903 1910 bare_package:
3280af22 1911 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
79cb57f6 1912 newSVpvn(tmpbuf,len));
3280af22
NIS
1913 PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
1914 PL_expect = XTERM;
a0d0e21e 1915 force_next(WORD);
3280af22 1916 PL_bufptr = s;
a0d0e21e
LW
1917 return *s == '(' ? FUNCMETH : METHOD;
1918 }
1919 }
1920 return 0;
1921}
1922
ffb4593c
NT
1923/*
1924 * S_incl_perldb
1925 * Return a string of Perl code to load the debugger. If PERL5DB
1926 * is set, it will return the contents of that, otherwise a
1927 * compile-time require of perl5db.pl.
1928 */
1929
76e3520e 1930STATIC char*
cea2e8a9 1931S_incl_perldb(pTHX)
a0d0e21e 1932{
3280af22 1933 if (PL_perldb) {
76e3520e 1934 char *pdb = PerlEnv_getenv("PERL5DB");
a0d0e21e
LW
1935
1936 if (pdb)
1937 return pdb;
91487cfc 1938 SETERRNO(0,SS$_NORMAL);
a0d0e21e
LW
1939 return "BEGIN { require 'perl5db.pl' }";
1940 }
1941 return "";
1942}
1943
1944
16d20bd9 1945/* Encoded script support. filter_add() effectively inserts a
4e553d73 1946 * 'pre-processing' function into the current source input stream.
16d20bd9
AD
1947 * Note that the filter function only applies to the current source file
1948 * (e.g., it will not affect files 'require'd or 'use'd by this one).
1949 *
1950 * The datasv parameter (which may be NULL) can be used to pass
1951 * private data to this instance of the filter. The filter function
1952 * can recover the SV using the FILTER_DATA macro and use it to
1953 * store private buffers and state information.
1954 *
1955 * The supplied datasv parameter is upgraded to a PVIO type
4755096e 1956 * and the IoDIRP/IoANY field is used to store the function pointer,
e0c19803 1957 * and IOf_FAKE_DIRP is enabled on datasv to mark this as such.
16d20bd9
AD
1958 * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
1959 * private use must be set using malloc'd pointers.
1960 */
16d20bd9
AD
1961
1962SV *
864dbfa3 1963Perl_filter_add(pTHX_ filter_t funcp, SV *datasv)
16d20bd9 1964{
f4c556ac
GS
1965 if (!funcp)
1966 return Nullsv;
1967
3280af22
NIS
1968 if (!PL_rsfp_filters)
1969 PL_rsfp_filters = newAV();
16d20bd9 1970 if (!datasv)
8c52afec 1971 datasv = NEWSV(255,0);
16d20bd9 1972 if (!SvUPGRADE(datasv, SVt_PVIO))
cea2e8a9 1973 Perl_die(aTHX_ "Can't upgrade filter_add data to SVt_PVIO");
4755096e 1974 IoANY(datasv) = (void *)funcp; /* stash funcp into spare field */
e0c19803 1975 IoFLAGS(datasv) |= IOf_FAKE_DIRP;
f4c556ac
GS
1976 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n",
1977 funcp, SvPV_nolen(datasv)));
3280af22
NIS
1978 av_unshift(PL_rsfp_filters, 1);
1979 av_store(PL_rsfp_filters, 0, datasv) ;
16d20bd9
AD
1980 return(datasv);
1981}
4e553d73 1982
16d20bd9
AD
1983
1984/* Delete most recently added instance of this filter function. */
a0d0e21e 1985void
864dbfa3 1986Perl_filter_del(pTHX_ filter_t funcp)
16d20bd9 1987{
e0c19803 1988 SV *datasv;
f4c556ac 1989 DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", funcp));
3280af22 1990 if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
16d20bd9
AD
1991 return;
1992 /* if filter is on top of stack (usual case) just pop it off */
e0c19803 1993 datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters));
4755096e 1994 if (IoANY(datasv) == (void *)funcp) {
e0c19803 1995 IoFLAGS(datasv) &= ~IOf_FAKE_DIRP;
4755096e 1996 IoANY(datasv) = (void *)NULL;
3280af22 1997 sv_free(av_pop(PL_rsfp_filters));
e50aee73 1998
16d20bd9
AD
1999 return;
2000 }
2001 /* we need to search for the correct entry and clear it */
cea2e8a9 2002 Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)");
16d20bd9
AD
2003}
2004
2005
2006/* Invoke the n'th filter function for the current rsfp. */
2007I32
864dbfa3 2008Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
4e553d73
NIS
2009
2010
8ac85365 2011 /* 0 = read one text line */
a0d0e21e 2012{
16d20bd9
AD
2013 filter_t funcp;
2014 SV *datasv = NULL;
e50aee73 2015
3280af22 2016 if (!PL_rsfp_filters)
16d20bd9 2017 return -1;
3280af22 2018 if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
16d20bd9
AD
2019 /* Provide a default input filter to make life easy. */
2020 /* Note that we append to the line. This is handy. */
f4c556ac
GS
2021 DEBUG_P(PerlIO_printf(Perl_debug_log,
2022 "filter_read %d: from rsfp\n", idx));
4e553d73 2023 if (maxlen) {
16d20bd9
AD
2024 /* Want a block */
2025 int len ;
2026 int old_len = SvCUR(buf_sv) ;
2027
2028 /* ensure buf_sv is large enough */
2029 SvGROW(buf_sv, old_len + maxlen) ;
3280af22
NIS
2030 if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
2031 if (PerlIO_error(PL_rsfp))
37120919
AD
2032 return -1; /* error */
2033 else
2034 return 0 ; /* end of file */
2035 }
16d20bd9
AD
2036 SvCUR_set(buf_sv, old_len + len) ;
2037 } else {
2038 /* Want a line */
3280af22
NIS
2039 if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
2040 if (PerlIO_error(PL_rsfp))
37120919
AD
2041 return -1; /* error */
2042 else
2043 return 0 ; /* end of file */
2044 }
16d20bd9
AD
2045 }
2046 return SvCUR(buf_sv);
2047 }
2048 /* Skip this filter slot if filter has been deleted */
3280af22 2049 if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
f4c556ac
GS
2050 DEBUG_P(PerlIO_printf(Perl_debug_log,
2051 "filter_read %d: skipped (filter deleted)\n",
2052 idx));
16d20bd9
AD
2053 return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
2054 }
2055 /* Get function pointer hidden within datasv */
4755096e 2056 funcp = (filter_t)IoANY(datasv);
f4c556ac
GS
2057 DEBUG_P(PerlIO_printf(Perl_debug_log,
2058 "filter_read %d: via function %p (%s)\n",
2059 idx, funcp, SvPV_nolen(datasv)));
16d20bd9
AD
2060 /* Call function. The function is expected to */
2061 /* call "FILTER_READ(idx+1, buf_sv)" first. */
37120919 2062 /* Return: <0:error, =0:eof, >0:not eof */
acfe0abc 2063 return (*funcp)(aTHX_ idx, buf_sv, maxlen);
16d20bd9
AD
2064}
2065
76e3520e 2066STATIC char *
cea2e8a9 2067S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
16d20bd9 2068{
c39cd008 2069#ifdef PERL_CR_FILTER
3280af22 2070 if (!PL_rsfp_filters) {
c39cd008 2071 filter_add(S_cr_textfilter,NULL);
a868473f
NIS
2072 }
2073#endif
3280af22 2074 if (PL_rsfp_filters) {
16d20bd9 2075
55497cff 2076 if (!append)
2077 SvCUR_set(sv, 0); /* start with empty line */
16d20bd9
AD
2078 if (FILTER_READ(0, sv, 0) > 0)
2079 return ( SvPVX(sv) ) ;
2080 else
2081 return Nullch ;
2082 }
9d116dd7 2083 else
fd049845 2084 return (sv_gets(sv, fp, append));
a0d0e21e
LW
2085}
2086
01ec43d0
GS
2087STATIC HV *
2088S_find_in_my_stash(pTHX_ char *pkgname, I32 len)
def3634b
GS
2089{
2090 GV *gv;
2091
01ec43d0 2092 if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__"))
def3634b
GS
2093 return PL_curstash;
2094
2095 if (len > 2 &&
2096 (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') &&
01ec43d0
GS
2097 (gv = gv_fetchpv(pkgname, FALSE, SVt_PVHV)))
2098 {
2099 return GvHV(gv); /* Foo:: */
def3634b
GS
2100 }
2101
2102 /* use constant CLASS => 'MyClass' */
2103 if ((gv = gv_fetchpv(pkgname, FALSE, SVt_PVCV))) {
2104 SV *sv;
2105 if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) {
2106 pkgname = SvPV_nolen(sv);
2107 }
2108 }
2109
2110 return gv_stashpv(pkgname, FALSE);
2111}
a0d0e21e 2112
748a9306
LW
2113#ifdef DEBUGGING
2114 static char* exp_name[] =
09bef843
SB
2115 { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK",
2116 "ATTRTERM", "TERMBLOCK"
2117 };
748a9306 2118#endif
463ee0b2 2119
02aa26ce
NT
2120/*
2121 yylex
2122
2123 Works out what to call the token just pulled out of the input
2124 stream. The yacc parser takes care of taking the ops we return and
2125 stitching them into a tree.
2126
2127 Returns:
2128 PRIVATEREF
2129
2130 Structure:
2131 if read an identifier
2132 if we're in a my declaration
2133 croak if they tried to say my($foo::bar)
2134 build the ops for a my() declaration
2135 if it's an access to a my() variable
2136 are we in a sort block?
2137 croak if my($a); $a <=> $b
2138 build ops for access to a my() variable
2139 if in a dq string, and they've said @foo and we can't find @foo
2140 croak
2141 build ops for a bareword
2142 if we already built the token before, use it.
2143*/
2144
dba4d153 2145#ifdef USE_PURE_BISON
864dbfa3 2146int
dba4d153 2147Perl_yylex_r(pTHX_ YYSTYPE *lvalp, int *lcharp)
378cc40b 2148{
20141f0e
IRC
2149 int r;
2150
6f202aea 2151 yyactlevel++;
20141f0e
IRC
2152 yylval_pointer[yyactlevel] = lvalp;
2153 yychar_pointer[yyactlevel] = lcharp;
b73d6f50
IRC
2154 if (yyactlevel >= YYMAXLEVEL)
2155 Perl_croak(aTHX_ "panic: YYMAXLEVEL");
20141f0e 2156
dba4d153 2157 r = Perl_yylex(aTHX);
20141f0e 2158
d8ae6756
IRC
2159 if (yyactlevel > 0)
2160 yyactlevel--;
20141f0e
IRC
2161
2162 return r;
2163}
dba4d153 2164#endif
20141f0e 2165
dba4d153
JH
2166#ifdef __SC__
2167#pragma segment Perl_yylex
2168#endif
dba4d153 2169int
dba4d153 2170Perl_yylex(pTHX)
20141f0e 2171{
79072805 2172 register char *s;
378cc40b 2173 register char *d;
79072805 2174 register I32 tmp;
463ee0b2 2175 STRLEN len;
161b471a
NIS
2176 GV *gv = Nullgv;
2177 GV **gvp = 0;
aa7440fb 2178 bool bof = FALSE;
a687059c 2179
02aa26ce 2180 /* check if there's an identifier for us to look at */
8eceec63 2181 if (PL_pending_ident)
e930465f 2182 return S_pending_ident(aTHX);
bbce6d69 2183
02aa26ce
NT
2184 /* no identifier pending identification */
2185
3280af22 2186 switch (PL_lex_state) {
79072805
LW
2187#ifdef COMMENTARY
2188 case LEX_NORMAL: /* Some compilers will produce faster */
2189 case LEX_INTERPNORMAL: /* code if we comment these out. */
2190 break;
2191#endif
2192
09bef843 2193 /* when we've already built the next token, just pull it out of the queue */
79072805 2194 case LEX_KNOWNEXT:
3280af22
NIS
2195 PL_nexttoke--;
2196 yylval = PL_nextval[PL_nexttoke];
2197 if (!PL_nexttoke) {
2198 PL_lex_state = PL_lex_defer;
2199 PL_expect = PL_lex_expect;
2200 PL_lex_defer = LEX_NORMAL;
463ee0b2 2201 }
607df283 2202 DEBUG_T({ PerlIO_printf(Perl_debug_log,
4659c93f 2203 "### Next token after '%s' was known, type %"IVdf"\n", PL_bufptr,
5f80b19c 2204 (IV)PL_nexttype[PL_nexttoke]); });
607df283 2205
3280af22 2206 return(PL_nexttype[PL_nexttoke]);
79072805 2207
02aa26ce 2208 /* interpolated case modifiers like \L \U, including \Q and \E.
3280af22 2209 when we get here, PL_bufptr is at the \
02aa26ce 2210 */
79072805
LW
2211 case LEX_INTERPCASEMOD:
2212#ifdef DEBUGGING
3280af22 2213 if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
cea2e8a9 2214 Perl_croak(aTHX_ "panic: INTERPCASEMOD");
79072805 2215#endif
02aa26ce 2216 /* handle \E or end of string */
3280af22 2217 if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
a0d0e21e 2218 char oldmod;
02aa26ce
NT
2219
2220 /* if at a \E */
3280af22
NIS
2221 if (PL_lex_casemods) {
2222 oldmod = PL_lex_casestack[--PL_lex_casemods];
2223 PL_lex_casestack[PL_lex_casemods] = '\0';
02aa26ce 2224
3280af22
NIS
2225 if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
2226 PL_bufptr += 2;
2227 PL_lex_state = LEX_INTERPCONCAT;
a0d0e21e 2228 }
79072805
LW
2229 return ')';
2230 }
3280af22
NIS
2231 if (PL_bufptr != PL_bufend)
2232 PL_bufptr += 2;
2233 PL_lex_state = LEX_INTERPCONCAT;
cea2e8a9 2234 return yylex();
79072805
LW
2235 }
2236 else {
607df283 2237 DEBUG_T({ PerlIO_printf(Perl_debug_log,
5f80b19c 2238 "### Saw case modifier at '%s'\n", PL_bufptr); });
3280af22 2239 s = PL_bufptr + 1;
79072805
LW
2240 if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
2241 tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
a0d0e21e 2242 if (strchr("LU", *s) &&
3280af22 2243 (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
a0d0e21e 2244 {
3280af22 2245 PL_lex_casestack[--PL_lex_casemods] = '\0';
a0d0e21e
LW
2246 return ')';
2247 }
3280af22
NIS
2248 if (PL_lex_casemods > 10) {
2249 char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
2250 if (newlb != PL_lex_casestack) {
a0d0e21e 2251 SAVEFREEPV(newlb);
3280af22 2252 PL_lex_casestack = newlb;
a0d0e21e
LW
2253 }
2254 }
3280af22
NIS
2255 PL_lex_casestack[PL_lex_casemods++] = *s;
2256 PL_lex_casestack[PL_lex_casemods] = '\0';
2257 PL_lex_state = LEX_INTERPCONCAT;
2258 PL_nextval[PL_nexttoke].ival = 0;
79072805
LW
2259 force_next('(');
2260 if (*s == 'l')
3280af22 2261 PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
79072805 2262 else if (*s == 'u')
3280af22 2263 PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
79072805 2264 else if (*s == 'L')
3280af22 2265 PL_nextval[PL_nexttoke].ival = OP_LC;
79072805 2266 else if (*s == 'U')
3280af22 2267 PL_nextval[PL_nexttoke].ival = OP_UC;
a0d0e21e 2268 else if (*s == 'Q')
3280af22 2269 PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
79072805 2270 else
cea2e8a9 2271 Perl_croak(aTHX_ "panic: yylex");
3280af22 2272 PL_bufptr = s + 1;
79072805 2273 force_next(FUNC);
3280af22
NIS
2274 if (PL_lex_starts) {
2275 s = PL_bufptr;
2276 PL_lex_starts = 0;
79072805
LW
2277 Aop(OP_CONCAT);
2278 }
2279 else
cea2e8a9 2280 return yylex();
79072805
LW
2281 }
2282
55497cff 2283 case LEX_INTERPPUSH:
2284 return sublex_push();
2285
79072805 2286 case LEX_INTERPSTART:
3280af22 2287 if (PL_bufptr == PL_bufend)
79072805 2288 return sublex_done();
607df283 2289 DEBUG_T({ PerlIO_printf(Perl_debug_log,
5f80b19c 2290 "### Interpolated variable at '%s'\n", PL_bufptr); });
3280af22
NIS
2291 PL_expect = XTERM;
2292 PL_lex_dojoin = (*PL_bufptr == '@');
2293 PL_lex_state = LEX_INTERPNORMAL;
2294 if (PL_lex_dojoin) {
2295 PL_nextval[PL_nexttoke].ival = 0;
79072805 2296 force_next(',');
4d1ff10f 2297#ifdef USE_5005THREADS
533c011a
NIS
2298 PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
2299 PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
554b3eca
MB
2300 force_next(PRIVATEREF);
2301#else
a0d0e21e 2302 force_ident("\"", '$');
4d1ff10f 2303#endif /* USE_5005THREADS */
3280af22 2304 PL_nextval[PL_nexttoke].ival = 0;
79072805 2305 force_next('$');
3280af22 2306 PL_nextval[PL_nexttoke].ival = 0;
79072805 2307 force_next('(');
3280af22 2308 PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
79072805
LW
2309 force_next(FUNC);
2310 }
3280af22
NIS
2311 if (PL_lex_starts++) {
2312 s = PL_bufptr;
79072805
LW
2313 Aop(OP_CONCAT);
2314 }
cea2e8a9 2315 return yylex();
79072805
LW
2316
2317 case LEX_INTERPENDMAYBE:
3280af22
NIS
2318 if (intuit_more(PL_bufptr)) {
2319 PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
79072805
LW
2320 break;
2321 }
2322 /* FALL THROUGH */
2323
2324 case LEX_INTERPEND:
3280af22
NIS
2325 if (PL_lex_dojoin) {
2326 PL_lex_dojoin = FALSE;
2327 PL_lex_state = LEX_INTERPCONCAT;
79072805
LW
2328 return ')';
2329 }
43a16006 2330 if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl
25da4f38 2331 && SvEVALED(PL_lex_repl))
43a16006 2332 {
e9fa98b2 2333 if (PL_bufptr != PL_bufend)
cea2e8a9 2334 Perl_croak(aTHX_ "Bad evalled substitution pattern");
e9fa98b2
HS
2335 PL_lex_repl = Nullsv;
2336 }
79072805
LW
2337 /* FALLTHROUGH */
2338 case LEX_INTERPCONCAT:
2339#ifdef DEBUGGING
3280af22 2340 if (PL_lex_brackets)
cea2e8a9 2341 Perl_croak(aTHX_ "panic: INTERPCONCAT");
79072805 2342#endif
3280af22 2343 if (PL_bufptr == PL_bufend)
79072805
LW
2344 return sublex_done();
2345
3280af22
NIS
2346 if (SvIVX(PL_linestr) == '\'') {
2347 SV *sv = newSVsv(PL_linestr);
2348 if (!PL_lex_inpat)
76e3520e 2349 sv = tokeq(sv);
3280af22 2350 else if ( PL_hints & HINT_NEW_RE )
b3ac6de7 2351 sv = new_constant(NULL, 0, "qr", sv, sv, "q");
79072805 2352 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
3280af22 2353 s = PL_bufend;
79072805
LW
2354 }
2355 else {
3280af22 2356 s = scan_const(PL_bufptr);
79072805 2357 if (*s == '\\')
3280af22 2358 PL_lex_state = LEX_INTERPCASEMOD;
79072805 2359 else
3280af22 2360 PL_lex_state = LEX_INTERPSTART;
79072805
LW
2361 }
2362
3280af22
NIS
2363 if (s != PL_bufptr) {
2364 PL_nextval[PL_nexttoke] = yylval;
2365 PL_expect = XTERM;
79072805 2366 force_next(THING);
3280af22 2367 if (PL_lex_starts++)
79072805
LW
2368 Aop(OP_CONCAT);
2369 else {
3280af22 2370 PL_bufptr = s;
cea2e8a9 2371 return yylex();
79072805
LW
2372 }
2373 }
2374
cea2e8a9 2375 return yylex();
a0d0e21e 2376 case LEX_FORMLINE:
3280af22
NIS
2377 PL_lex_state = LEX_NORMAL;
2378 s = scan_formline(PL_bufptr);
2379 if (!PL_lex_formbrack)
a0d0e21e
LW
2380 goto rightbracket;
2381 OPERATOR(';');
79072805
LW
2382 }
2383
3280af22
NIS
2384 s = PL_bufptr;
2385 PL_oldoldbufptr = PL_oldbufptr;
2386 PL_oldbufptr = s;
607df283 2387 DEBUG_T( {
bf49b057
GS
2388 PerlIO_printf(Perl_debug_log, "### Tokener expecting %s at %s\n",
2389 exp_name[PL_expect], s);
5f80b19c 2390 } );
463ee0b2
LW
2391
2392 retry:
378cc40b
LW
2393 switch (*s) {
2394 default:
7e2040f0 2395 if (isIDFIRST_lazy_if(s,UTF))
834a4ddd 2396 goto keylookup;
cea2e8a9 2397 Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255);
e929a76b
LW
2398 case 4:
2399 case 26:
2400 goto fake_eof; /* emulate EOF on ^D or ^Z */
378cc40b 2401 case 0:
3280af22
NIS
2402 if (!PL_rsfp) {
2403 PL_last_uni = 0;
2404 PL_last_lop = 0;
2405 if (PL_lex_brackets)
d98d5fff 2406 yyerror("Missing right curly or square bracket");
4e553d73 2407 DEBUG_T( { PerlIO_printf(Perl_debug_log,
607df283 2408 "### Tokener got EOF\n");
5f80b19c 2409 } );
79072805 2410 TOKEN(0);
463ee0b2 2411 }
3280af22 2412 if (s++ < PL_bufend)
a687059c 2413 goto retry; /* ignore stray nulls */
3280af22
NIS
2414 PL_last_uni = 0;
2415 PL_last_lop = 0;
2416 if (!PL_in_eval && !PL_preambled) {
2417 PL_preambled = TRUE;
2418 sv_setpv(PL_linestr,incl_perldb());
2419 if (SvCUR(PL_linestr))
2420 sv_catpv(PL_linestr,";");
2421 if (PL_preambleav){
2422 while(AvFILLp(PL_preambleav) >= 0) {
2423 SV *tmpsv = av_shift(PL_preambleav);
2424 sv_catsv(PL_linestr, tmpsv);
2425 sv_catpv(PL_linestr, ";");
91b7def8 2426 sv_free(tmpsv);
2427 }
3280af22
NIS
2428 sv_free((SV*)PL_preambleav);
2429 PL_preambleav = NULL;
91b7def8 2430 }
3280af22
NIS
2431 if (PL_minus_n || PL_minus_p) {
2432 sv_catpv(PL_linestr, "LINE: while (<>) {");
2433 if (PL_minus_l)
2434 sv_catpv(PL_linestr,"chomp;");
2435 if (PL_minus_a) {
3280af22
NIS
2436 if (PL_minus_F) {
2437 if (strchr("/'\"", *PL_splitstr)
2438 && strchr(PL_splitstr + 1, *PL_splitstr))
cea2e8a9 2439 Perl_sv_catpvf(aTHX_ PL_linestr, "@F=split(%s);", PL_splitstr);
54310121 2440 else {
2441 char delim;
2442 s = "'~#\200\1'"; /* surely one char is unused...*/
3280af22 2443 while (s[1] && strchr(PL_splitstr, *s)) s++;
54310121 2444 delim = *s;
75c72d73 2445 Perl_sv_catpvf(aTHX_ PL_linestr, "our @F=split(%s%c",
46fc3d4c 2446 "q" + (delim == '\''), delim);
3280af22 2447 for (s = PL_splitstr; *s; s++) {
54310121 2448 if (*s == '\\')
3280af22
NIS
2449 sv_catpvn(PL_linestr, "\\", 1);
2450 sv_catpvn(PL_linestr, s, 1);
54310121 2451 }
cea2e8a9 2452 Perl_sv_catpvf(aTHX_ PL_linestr, "%c);", delim);
54310121 2453 }
2304df62
AD
2454 }
2455 else
75c72d73 2456 sv_catpv(PL_linestr,"our @F=split(' ');");
2304df62 2457 }
79072805 2458 }
3280af22
NIS
2459 sv_catpv(PL_linestr, "\n");
2460 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2461 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 2462 PL_last_lop = PL_last_uni = Nullch;
3280af22 2463 if (PERLDB_LINE && PL_curstash != PL_debstash) {
a0d0e21e
LW
2464 SV *sv = NEWSV(85,0);
2465
2466 sv_upgrade(sv, SVt_PVMG);
3280af22 2467 sv_setsv(sv,PL_linestr);
57843af0 2468 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
a0d0e21e 2469 }
79072805 2470 goto retry;
a687059c 2471 }
e929a76b 2472 do {
aa7440fb 2473 bof = PL_rsfp ? TRUE : FALSE;
7e28d3af
JH
2474 if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
2475 fake_eof:
2476 if (PL_rsfp) {
2477 if (PL_preprocess && !PL_in_eval)
2478 (void)PerlProc_pclose(PL_rsfp);
2479 else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
2480 PerlIO_clearerr(PL_rsfp);
2481 else
2482 (void)PerlIO_close(PL_rsfp);
2483 PL_rsfp = Nullfp;
2484 PL_doextract = FALSE;
2485 }
2486 if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
2487 sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
2488 sv_catpv(PL_linestr,";}");
2489 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2490 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 2491 PL_last_lop = PL_last_uni = Nullch;
7e28d3af
JH
2492 PL_minus_n = PL_minus_p = 0;
2493 goto retry;
2494 }
2495 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
207e3d1a 2496 PL_last_lop = PL_last_uni = Nullch;
7e28d3af
JH
2497 sv_setpv(PL_linestr,"");
2498 TOKEN(';'); /* not infinite loop because rsfp is NULL now */
2499 }
2500 /* if it looks like the start of a BOM, check if it in fact is */
2501 else if (bof && (!*s || *(U8*)s == 0xEF || *(U8*)s >= 0xFE)) {
226017aa 2502#ifdef PERLIO_IS_STDIO
e3f494f1
JH
2503# ifdef __GNU_LIBRARY__
2504# if __GNU_LIBRARY__ == 1 /* Linux glibc5 */
226017aa
DD
2505# define FTELL_FOR_PIPE_IS_BROKEN
2506# endif
e3f494f1
JH
2507# else
2508# ifdef __GLIBC__
2509# if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */
2510# define FTELL_FOR_PIPE_IS_BROKEN
2511# endif
2512# endif
226017aa
DD
2513# endif
2514#endif
2515#ifdef FTELL_FOR_PIPE_IS_BROKEN
2516 /* This loses the possibility to detect the bof
2517 * situation on perl -P when the libc5 is being used.
2518 * Workaround? Maybe attach some extra state to PL_rsfp?
2519 */
2520 if (!PL_preprocess)
7e28d3af 2521 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
226017aa 2522#else
7e28d3af 2523 bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
226017aa 2524#endif
7e28d3af 2525 if (bof) {
3280af22 2526 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
7e28d3af 2527 s = swallow_bom((U8*)s);
e929a76b 2528 }
378cc40b 2529 }
3280af22 2530 if (PL_doextract) {
a0d0e21e 2531 if (*s == '#' && s[1] == '!' && instr(s,"perl"))
3280af22 2532 PL_doextract = FALSE;
a0d0e21e
LW
2533
2534 /* Incest with pod. */
2535 if (*s == '=' && strnEQ(s, "=cut", 4)) {
3280af22
NIS
2536 sv_setpv(PL_linestr, "");
2537 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2538 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 2539 PL_last_lop = PL_last_uni = Nullch;
3280af22 2540 PL_doextract = FALSE;
a0d0e21e 2541 }
4e553d73 2542 }
463ee0b2 2543 incline(s);
3280af22
NIS
2544 } while (PL_doextract);
2545 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
2546 if (PERLDB_LINE && PL_curstash != PL_debstash) {
79072805 2547 SV *sv = NEWSV(85,0);
a687059c 2548
93a17b20 2549 sv_upgrade(sv, SVt_PVMG);
3280af22 2550 sv_setsv(sv,PL_linestr);
57843af0 2551 av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
a687059c 2552 }
3280af22 2553 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 2554 PL_last_lop = PL_last_uni = Nullch;
57843af0 2555 if (CopLINE(PL_curcop) == 1) {
3280af22 2556 while (s < PL_bufend && isSPACE(*s))
79072805 2557 s++;
a0d0e21e 2558 if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
79072805 2559 s++;
44a8e56a 2560 d = Nullch;
3280af22 2561 if (!PL_in_eval) {
44a8e56a 2562 if (*s == '#' && *(s+1) == '!')
2563 d = s + 2;
2564#ifdef ALTERNATE_SHEBANG
2565 else {
2566 static char as[] = ALTERNATE_SHEBANG;
2567 if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
2568 d = s + (sizeof(as) - 1);
2569 }
2570#endif /* ALTERNATE_SHEBANG */
2571 }
2572 if (d) {
b8378b72 2573 char *ipath;
774d564b 2574 char *ipathend;
b8378b72 2575
774d564b 2576 while (isSPACE(*d))
b8378b72
CS
2577 d++;
2578 ipath = d;
774d564b 2579 while (*d && !isSPACE(*d))
2580 d++;
2581 ipathend = d;
2582
2583#ifdef ARG_ZERO_IS_SCRIPT
2584 if (ipathend > ipath) {
2585 /*
2586 * HP-UX (at least) sets argv[0] to the script name,
2587 * which makes $^X incorrect. And Digital UNIX and Linux,
2588 * at least, set argv[0] to the basename of the Perl
2589 * interpreter. So, having found "#!", we'll set it right.
2590 */
2591 SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
2592 assert(SvPOK(x) || SvGMAGICAL(x));
cc49e20b 2593 if (sv_eq(x, CopFILESV(PL_curcop))) {
774d564b 2594 sv_setpvn(x, ipath, ipathend - ipath);
9607fc9c 2595 SvSETMAGIC(x);
2596 }
774d564b 2597 TAINT_NOT; /* $^X is always tainted, but that's OK */
8ebc5c01 2598 }
774d564b 2599#endif /* ARG_ZERO_IS_SCRIPT */
b8378b72
CS
2600
2601 /*
2602 * Look for options.
2603 */
748a9306 2604 d = instr(s,"perl -");
84e30d1a 2605 if (!d) {
748a9306 2606 d = instr(s,"perl");
84e30d1a
GS
2607#if defined(DOSISH)
2608 /* avoid getting into infinite loops when shebang
2609 * line contains "Perl" rather than "perl" */
2610 if (!d) {
2611 for (d = ipathend-4; d >= ipath; --d) {
2612 if ((*d == 'p' || *d == 'P')
2613 && !ibcmp(d, "perl", 4))
2614 {
2615 break;
2616 }
2617 }
2618 if (d < ipath)
2619 d = Nullch;
2620 }
2621#endif
2622 }
44a8e56a 2623#ifdef ALTERNATE_SHEBANG
2624 /*
2625 * If the ALTERNATE_SHEBANG on this system starts with a
2626 * character that can be part of a Perl expression, then if
2627 * we see it but not "perl", we're probably looking at the
2628 * start of Perl code, not a request to hand off to some
2629 * other interpreter. Similarly, if "perl" is there, but
2630 * not in the first 'word' of the line, we assume the line
2631 * contains the start of the Perl program.
44a8e56a 2632 */
2633 if (d && *s != '#') {
774d564b 2634 char *c = ipath;
44a8e56a 2635 while (*c && !strchr("; \t\r\n\f\v#", *c))
2636 c++;
2637 if (c < d)
2638 d = Nullch; /* "perl" not in first word; ignore */
2639 else
2640 *s = '#'; /* Don't try to parse shebang line */
2641 }
774d564b 2642#endif /* ALTERNATE_SHEBANG */
bf4acbe4 2643#ifndef MACOS_TRADITIONAL
748a9306 2644 if (!d &&
44a8e56a 2645 *s == '#' &&
774d564b 2646 ipathend > ipath &&
3280af22 2647 !PL_minus_c &&
748a9306 2648 !instr(s,"indir") &&
3280af22 2649 instr(PL_origargv[0],"perl"))
748a9306 2650 {
9f68db38 2651 char **newargv;
9f68db38 2652
774d564b 2653 *ipathend = '\0';
2654 s = ipathend + 1;
3280af22 2655 while (s < PL_bufend && isSPACE(*s))
9f68db38 2656 s++;
3280af22
NIS
2657 if (s < PL_bufend) {
2658 Newz(899,newargv,PL_origargc+3,char*);
9f68db38 2659 newargv[1] = s;
3280af22 2660 while (s < PL_bufend && !isSPACE(*s))
9f68db38
LW
2661 s++;
2662 *s = '\0';
3280af22 2663 Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
9f68db38
LW
2664 }
2665 else
3280af22 2666 newargv = PL_origargv;
774d564b 2667 newargv[0] = ipath;
b4748376 2668 PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv));
cea2e8a9 2669 Perl_croak(aTHX_ "Can't exec %s", ipath);
9f68db38 2670 }
bf4acbe4 2671#endif
748a9306 2672 if (d) {
3280af22
NIS
2673 U32 oldpdb = PL_perldb;
2674 bool oldn = PL_minus_n;
2675 bool oldp = PL_minus_p;
748a9306
LW
2676
2677 while (*d && !isSPACE(*d)) d++;
bf4acbe4 2678 while (SPACE_OR_TAB(*d)) d++;
748a9306
LW
2679
2680 if (*d++ == '-') {
8cc95fdb 2681 do {
2682 if (*d == 'M' || *d == 'm') {
2683 char *m = d;
2684 while (*d && !isSPACE(*d)) d++;
cea2e8a9 2685 Perl_croak(aTHX_ "Too late for \"-%.*s\" option",
8cc95fdb 2686 (int)(d - m), m);
2687 }
2688 d = moreswitches(d);
2689 } while (d);
155aba94
GS
2690 if ((PERLDB_LINE && !oldpdb) ||
2691 ((PL_minus_n || PL_minus_p) && !(oldn || oldp)))
b084f20b 2692 /* if we have already added "LINE: while (<>) {",
2693 we must not do it again */
748a9306 2694 {
3280af22
NIS
2695 sv_setpv(PL_linestr, "");
2696 PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
2697 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 2698 PL_last_lop = PL_last_uni = Nullch;
3280af22 2699 PL_preambled = FALSE;
84902520 2700 if (PERLDB_LINE)
3280af22 2701 (void)gv_fetchfile(PL_origfilename);
748a9306
LW
2702 goto retry;
2703 }
a0d0e21e 2704 }
79072805 2705 }
9f68db38 2706 }
79072805 2707 }
3280af22
NIS
2708 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2709 PL_bufptr = s;
2710 PL_lex_state = LEX_FORMLINE;
cea2e8a9 2711 return yylex();
ae986130 2712 }
378cc40b 2713 goto retry;
4fdae800 2714 case '\r':
6a27c188 2715#ifdef PERL_STRICT_CR
cea2e8a9 2716 Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r');
4e553d73 2717 Perl_croak(aTHX_
cc507455 2718 "\t(Maybe you didn't strip carriage returns after a network transfer?)\n");
a868473f 2719#endif
4fdae800 2720 case ' ': case '\t': case '\f': case 013:
bf4acbe4
GS
2721#ifdef MACOS_TRADITIONAL
2722 case '\312':
2723#endif
378cc40b
LW
2724 s++;
2725 goto retry;
378cc40b 2726 case '#':
e929a76b 2727 case '\n':
3280af22 2728 if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
df0deb90
GS
2729 if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) {
2730 /* handle eval qq[#line 1 "foo"\n ...] */
2731 CopLINE_dec(PL_curcop);
2732 incline(s);
2733 }
3280af22 2734 d = PL_bufend;
a687059c 2735 while (s < d && *s != '\n')
378cc40b 2736 s++;
0f85fab0 2737 if (s < d)
378cc40b 2738 s++;
78c267c1 2739 else if (s > d) /* Found by Ilya: feed random input to Perl. */
a8406387 2740 Perl_croak(aTHX_ "panic: input overflow");
463ee0b2 2741 incline(s);
3280af22
NIS
2742 if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
2743 PL_bufptr = s;
2744 PL_lex_state = LEX_FORMLINE;
cea2e8a9 2745 return yylex();
a687059c 2746 }
378cc40b 2747 }
a687059c 2748 else {
378cc40b 2749 *s = '\0';
3280af22 2750 PL_bufend = s;
a687059c 2751 }
378cc40b
LW
2752 goto retry;
2753 case '-':
79072805 2754 if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
e5edeb50
JH
2755 I32 ftst = 0;
2756
378cc40b 2757 s++;
3280af22 2758 PL_bufptr = s;
748a9306
LW
2759 tmp = *s++;
2760
bf4acbe4 2761 while (s < PL_bufend && SPACE_OR_TAB(*s))
748a9306
LW
2762 s++;
2763
2764 if (strnEQ(s,"=>",2)) {
3280af22 2765 s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
4e553d73 2766 DEBUG_T( { PerlIO_printf(Perl_debug_log,
607df283 2767 "### Saw unary minus before =>, forcing word '%s'\n", s);
5f80b19c 2768 } );
748a9306
LW
2769 OPERATOR('-'); /* unary minus */
2770 }
3280af22 2771 PL_last_uni = PL_oldbufptr;
748a9306 2772 switch (tmp) {
e5edeb50
JH
2773 case 'r': ftst = OP_FTEREAD; break;
2774 case 'w': ftst = OP_FTEWRITE; break;
2775 case 'x': ftst = OP_FTEEXEC; break;
2776 case 'o': ftst = OP_FTEOWNED; break;
2777 case 'R': ftst = OP_FTRREAD; break;
2778 case 'W': ftst = OP_FTRWRITE; break;
2779 case 'X': ftst = OP_FTREXEC; break;
2780 case 'O': ftst = OP_FTROWNED; break;
2781 case 'e': ftst = OP_FTIS; break;
2782 case 'z': ftst = OP_FTZERO; break;
2783 case 's': ftst = OP_FTSIZE; break;
2784 case 'f': ftst = OP_FTFILE; break;
2785 case 'd': ftst = OP_FTDIR; break;
2786 case 'l': ftst = OP_FTLINK; break;
2787 case 'p': ftst = OP_FTPIPE; break;
2788 case 'S': ftst = OP_FTSOCK; break;
2789 case 'u': ftst = OP_FTSUID; break;
2790 case 'g': ftst = OP_FTSGID; break;
2791 case 'k': ftst = OP_FTSVTX; break;
2792 case 'b': ftst = OP_FTBLK; break;
2793 case 'c': ftst = OP_FTCHR; break;
2794 case 't': ftst = OP_FTTTY; break;
2795 case 'T': ftst = OP_FTTEXT; break;
2796 case 'B': ftst = OP_FTBINARY; break;
2797 case 'M': case 'A': case 'C':
2798 gv_fetchpv("\024",TRUE, SVt_PV);
2799 switch (tmp) {
2800 case 'M': ftst = OP_FTMTIME; break;
2801 case 'A': ftst = OP_FTATIME; break;
2802 case 'C': ftst = OP_FTCTIME; break;
2803 default: break;
2804 }
2805 break;
378cc40b 2806 default:
378cc40b
LW
2807 break;
2808 }
e5edeb50
JH
2809 if (ftst) {
2810 PL_last_lop_op = ftst;
4e553d73 2811 DEBUG_T( { PerlIO_printf(Perl_debug_log,
0844c848 2812 "### Saw file test %c\n", (int)ftst);
5f80b19c 2813 } );
e5edeb50
JH
2814 FTST(ftst);
2815 }
2816 else {
2817 /* Assume it was a minus followed by a one-letter named
2818 * subroutine call (or a -bareword), then. */
95c31fe3 2819 DEBUG_T( { PerlIO_printf(Perl_debug_log,
0844c848
RB
2820 "### %c looked like a file test but was not\n",
2821 (int)ftst);
5f80b19c 2822 } );
e5edeb50
JH
2823 s -= 2;
2824 }
378cc40b 2825 }
a687059c
LW
2826 tmp = *s++;
2827 if (*s == tmp) {
2828 s++;
3280af22 2829 if (PL_expect == XOPERATOR)
79072805
LW
2830 TERM(POSTDEC);
2831 else
2832 OPERATOR(PREDEC);
2833 }
2834 else if (*s == '>') {
2835 s++;
2836 s = skipspace(s);
7e2040f0 2837 if (isIDFIRST_lazy_if(s,UTF)) {
a0d0e21e 2838 s = force_word(s,METHOD,FALSE,TRUE,FALSE);
463ee0b2 2839 TOKEN(ARROW);
79072805 2840 }
748a9306
LW
2841 else if (*s == '$')
2842 OPERATOR(ARROW);
463ee0b2 2843 else
748a9306 2844 TERM(ARROW);
a687059c 2845 }
3280af22 2846 if (PL_expect == XOPERATOR)
79072805
LW
2847 Aop(OP_SUBTRACT);
2848 else {
3280af22 2849 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2f3197b3 2850 check_uni();
79072805 2851 OPERATOR('-'); /* unary minus */
2f3197b3 2852 }
79072805 2853
378cc40b 2854 case '+':
a687059c
LW
2855 tmp = *s++;
2856 if (*s == tmp) {
378cc40b 2857 s++;
3280af22 2858 if (PL_expect == XOPERATOR)
79072805
LW
2859 TERM(POSTINC);
2860 else
2861 OPERATOR(PREINC);
378cc40b 2862 }
3280af22 2863 if (PL_expect == XOPERATOR)
79072805
LW
2864 Aop(OP_ADD);
2865 else {
3280af22 2866 if (isSPACE(*s) || !isSPACE(*PL_bufptr))
2f3197b3 2867 check_uni();
a687059c 2868 OPERATOR('+');
2f3197b3 2869 }
a687059c 2870
378cc40b 2871 case '*':
3280af22
NIS
2872 if (PL_expect != XOPERATOR) {
2873 s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
2874 PL_expect = XOPERATOR;
2875 force_ident(PL_tokenbuf, '*');
2876 if (!*PL_tokenbuf)
a0d0e21e 2877 PREREF('*');
79072805 2878 TERM('*');
a687059c 2879 }
79072805
LW
2880 s++;
2881 if (*s == '*') {
a687059c 2882 s++;
79072805 2883 PWop(OP_POW);
a687059c 2884 }
79072805
LW
2885 Mop(OP_MULTIPLY);
2886
378cc40b 2887 case '%':
3280af22 2888 if (PL_expect == XOPERATOR) {
bbce6d69 2889 ++s;
2890 Mop(OP_MODULO);
a687059c 2891 }
3280af22
NIS
2892 PL_tokenbuf[0] = '%';
2893 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
2894 if (!PL_tokenbuf[1]) {
2895 if (s == PL_bufend)
bbce6d69 2896 yyerror("Final % should be \\% or %name");
2897 PREREF('%');
a687059c 2898 }
3280af22 2899 PL_pending_ident = '%';
bbce6d69 2900 TERM('%');
a687059c 2901
378cc40b 2902 case '^':
79072805 2903 s++;
a0d0e21e 2904 BOop(OP_BIT_XOR);
79072805 2905 case '[':
3280af22 2906 PL_lex_brackets++;
79072805 2907 /* FALL THROUGH */
378cc40b 2908 case '~':
378cc40b 2909 case ',':
378cc40b
LW
2910 tmp = *s++;
2911 OPERATOR(tmp);
a0d0e21e
LW
2912 case ':':
2913 if (s[1] == ':') {
2914 len = 0;
2915 goto just_a_word;
2916 }
2917 s++;
09bef843
SB
2918 switch (PL_expect) {
2919 OP *attrs;
2920 case XOPERATOR:
2921 if (!PL_in_my || PL_lex_state != LEX_NORMAL)
2922 break;
2923 PL_bufptr = s; /* update in case we back off */
2924 goto grabattrs;
2925 case XATTRBLOCK:
2926 PL_expect = XBLOCK;
2927 goto grabattrs;
2928 case XATTRTERM:
2929 PL_expect = XTERMBLOCK;
2930 grabattrs:
2931 s = skipspace(s);
2932 attrs = Nullop;
7e2040f0 2933 while (isIDFIRST_lazy_if(s,UTF)) {
09bef843 2934 d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
f9829d6b
GS
2935 if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) {
2936 if (tmp < 0) tmp = -tmp;
2937 switch (tmp) {
2938 case KEY_or:
2939 case KEY_and:
2940 case KEY_for:
2941 case KEY_unless:
2942 case KEY_if:
2943 case KEY_while:
2944 case KEY_until:
2945 goto got_attrs;
2946 default:
2947 break;
2948 }
2949 }
09bef843
SB
2950 if (*d == '(') {
2951 d = scan_str(d,TRUE,TRUE);
2952 if (!d) {
09bef843
SB
2953 /* MUST advance bufptr here to avoid bogus
2954 "at end of line" context messages from yyerror().
2955 */
2956 PL_bufptr = s + len;
2957 yyerror("Unterminated attribute parameter in attribute list");
2958 if (attrs)
2959 op_free(attrs);
2960 return 0; /* EOF indicator */
2961 }
2962 }
2963 if (PL_lex_stuff) {
2964 SV *sv = newSVpvn(s, len);
2965 sv_catsv(sv, PL_lex_stuff);
2966 attrs = append_elem(OP_LIST, attrs,
2967 newSVOP(OP_CONST, 0, sv));
2968 SvREFCNT_dec(PL_lex_stuff);
2969 PL_lex_stuff = Nullsv;
2970 }
2971 else {
78f9721b
SM
2972 if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
2973 CvLVALUE_on(PL_compcv);
2974 else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
2975 CvLOCKED_on(PL_compcv);
2976 else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
2977 CvMETHOD_on(PL_compcv);
87ecf892 2978#ifdef USE_ITHREADS
c8a3bf85 2979 else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "unique", len))
7fb37951 2980 GvUNIQUE_on(cGVOPx_gv(yylval.opval));
87ecf892 2981#endif
78f9721b
SM
2982 /* After we've set the flags, it could be argued that
2983 we don't need to do the attributes.pm-based setting
2984 process, and shouldn't bother appending recognized
2985 flags. To experiment with that, uncomment the
2986 following "else": */
0256094b 2987 else
78f9721b
SM
2988 attrs = append_elem(OP_LIST, attrs,
2989 newSVOP(OP_CONST, 0,
2990 newSVpvn(s, len)));
09bef843
SB
2991 }
2992 s = skipspace(d);
0120eecf 2993 if (*s == ':' && s[1] != ':')
09bef843 2994 s = skipspace(s+1);
0120eecf
GS
2995 else if (s == d)
2996 break; /* require real whitespace or :'s */
09bef843 2997 }
f9829d6b
GS
2998 tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
2999 if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
09bef843
SB
3000 char q = ((*s == '\'') ? '"' : '\'');
3001 /* If here for an expression, and parsed no attrs, back off. */
3002 if (tmp == '=' && !attrs) {
3003 s = PL_bufptr;
3004 break;
3005 }
3006 /* MUST advance bufptr here to avoid bogus "at end of line"
3007 context messages from yyerror().
3008 */
3009 PL_bufptr = s;
3010 if (!*s)
3011 yyerror("Unterminated attribute list");
3012 else
3013 yyerror(Perl_form(aTHX_ "Invalid separator character %c%c%c in attribute list",
3014 q, *s, q));
3015 if (attrs)
3016 op_free(attrs);
3017 OPERATOR(':');
3018 }
f9829d6b 3019 got_attrs:
09bef843
SB
3020 if (attrs) {
3021 PL_nextval[PL_nexttoke].opval = attrs;
3022 force_next(THING);
3023 }
3024 TOKEN(COLONATTR);
3025 }
a0d0e21e 3026 OPERATOR(':');
8990e307
LW
3027 case '(':
3028 s++;
3280af22
NIS
3029 if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
3030 PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
a0d0e21e 3031 else
3280af22 3032 PL_expect = XTERM;
a0d0e21e 3033 TOKEN('(');
378cc40b 3034 case ';':
f4dd75d9 3035 CLINE;
378cc40b
LW
3036 tmp = *s++;
3037 OPERATOR(tmp);
3038 case ')':
378cc40b 3039 tmp = *s++;
16d20bd9
AD
3040 s = skipspace(s);
3041 if (*s == '{')
3042 PREBLOCK(tmp);
378cc40b 3043 TERM(tmp);
79072805
LW
3044 case ']':
3045 s++;
3280af22 3046 if (PL_lex_brackets <= 0)
d98d5fff 3047 yyerror("Unmatched right square bracket");
463ee0b2 3048 else
3280af22
NIS
3049 --PL_lex_brackets;
3050 if (PL_lex_state == LEX_INTERPNORMAL) {
3051 if (PL_lex_brackets == 0) {
a0d0e21e 3052 if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
3280af22 3053 PL_lex_state = LEX_INTERPEND;
79072805
LW
3054 }
3055 }
4633a7c4 3056 TERM(']');
79072805
LW
3057 case '{':
3058 leftbracket:
79072805 3059 s++;
3280af22
NIS
3060 if (PL_lex_brackets > 100) {
3061 char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
3062 if (newlb != PL_lex_brackstack) {
8990e307 3063 SAVEFREEPV(newlb);
3280af22 3064 PL_lex_brackstack = newlb;
8990e307
LW
3065 }
3066 }
3280af22 3067 switch (PL_expect) {
a0d0e21e 3068 case XTERM:
3280af22 3069 if (PL_lex_formbrack) {
a0d0e21e
LW
3070 s--;
3071 PRETERMBLOCK(DO);
3072 }
3280af22
NIS
3073 if (PL_oldoldbufptr == PL_last_lop)
3074 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
a0d0e21e 3075 else
3280af22 3076 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
79072805 3077 OPERATOR(HASHBRACK);
a0d0e21e 3078 case XOPERATOR:
bf4acbe4 3079 while (s < PL_bufend && SPACE_OR_TAB(*s))
748a9306 3080 s++;
44a8e56a 3081 d = s;
3280af22
NIS
3082 PL_tokenbuf[0] = '\0';
3083 if (d < PL_bufend && *d == '-') {
3084 PL_tokenbuf[0] = '-';
44a8e56a 3085 d++;
bf4acbe4 3086 while (d < PL_bufend && SPACE_OR_TAB(*d))
44a8e56a 3087 d++;
3088 }
7e2040f0 3089 if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) {
3280af22 3090 d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
8903cb82 3091 FALSE, &len);
bf4acbe4 3092 while (d < PL_bufend && SPACE_OR_TAB(*d))
748a9306
LW
3093 d++;
3094 if (*d == '}') {
3280af22 3095 char minus = (PL_tokenbuf[0] == '-');
44a8e56a 3096 s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
3097 if (minus)
3098 force_next('-');
748a9306
LW
3099 }
3100 }
3101 /* FALL THROUGH */
09bef843 3102 case XATTRBLOCK:
748a9306 3103 case XBLOCK:
3280af22
NIS
3104 PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
3105 PL_expect = XSTATE;
a0d0e21e 3106 break;
09bef843 3107 case XATTRTERM:
a0d0e21e 3108 case XTERMBLOCK:
3280af22
NIS
3109 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
3110 PL_expect = XSTATE;
a0d0e21e
LW
3111 break;
3112 default: {
3113 char *t;
3280af22
NIS
3114 if (PL_oldoldbufptr == PL_last_lop)
3115 PL_lex_brackstack[PL_lex_brackets++] = XTERM;
a0d0e21e 3116 else
3280af22 3117 PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
a0d0e21e 3118 s = skipspace(s);
8452ff4b
SB
3119 if (*s == '}') {
3120 if (PL_expect == XREF && PL_lex_state == LEX_INTERPNORMAL) {
3121 PL_expect = XTERM;
3122 /* This hack is to get the ${} in the message. */
3123 PL_bufptr = s+1;
3124 yyerror("syntax error");
3125 break;
3126 }
a0d0e21e 3127 OPERATOR(HASHBRACK);
8452ff4b 3128 }
b8a4b1be
GS
3129 /* This hack serves to disambiguate a pair of curlies
3130 * as being a block or an anon hash. Normally, expectation
3131 * determines that, but in cases where we're not in a
3132 * position to expect anything in particular (like inside
3133 * eval"") we have to resolve the ambiguity. This code
3134 * covers the case where the first term in the curlies is a
3135 * quoted string. Most other cases need to be explicitly
3136 * disambiguated by prepending a `+' before the opening
3137 * curly in order to force resolution as an anon hash.
3138 *
3139 * XXX should probably propagate the outer expectation
3140 * into eval"" to rely less on this hack, but that could
3141 * potentially break current behavior of eval"".
3142 * GSAR 97-07-21
3143 */
3144 t = s;
3145 if (*s == '\'' || *s == '"' || *s == '`') {
3146 /* common case: get past first string, handling escapes */
3280af22 3147 for (t++; t < PL_bufend && *t != *s;)
b8a4b1be
GS
3148 if (*t++ == '\\' && (*t == '\\' || *t == *s))
3149 t++;
3150 t++;
a0d0e21e 3151 }
b8a4b1be 3152 else if (*s == 'q') {
3280af22 3153 if (++t < PL_bufend
b8a4b1be 3154 && (!isALNUM(*t)
3280af22 3155 || ((*t == 'q' || *t == 'x') && ++t < PL_bufend
0505442f
GS
3156 && !isALNUM(*t))))
3157 {
b8a4b1be
GS
3158 char *tmps;
3159 char open, close, term;
3160 I32 brackets = 1;
3161
3280af22 3162 while (t < PL_bufend && isSPACE(*t))
b8a4b1be
GS
3163 t++;
3164 term = *t;
3165 open = term;
3166 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
3167 term = tmps[5];
3168 close = term;
3169 if (open == close)
3280af22
NIS
3170 for (t++; t < PL_bufend; t++) {
3171 if (*t == '\\' && t+1 < PL_bufend && open != '\\')
b8a4b1be 3172 t++;
6d07e5e9 3173 else if (*t == open)
b8a4b1be
GS
3174 break;
3175 }
3176 else
3280af22
NIS
3177 for (t++; t < PL_bufend; t++) {
3178 if (*t == '\\' && t+1 < PL_bufend)
b8a4b1be 3179 t++;
6d07e5e9 3180 else if (*t == close && --brackets <= 0)
b8a4b1be
GS
3181 break;
3182 else if (*t == open)
3183 brackets++;
3184 }
3185 }
3186 t++;
a0d0e21e 3187 }
7e2040f0 3188 else if (isALNUM_lazy_if(t,UTF)) {
0505442f 3189 t += UTF8SKIP(t);
7e2040f0 3190 while (t < PL_bufend && isALNUM_lazy_if(t,UTF))
0505442f 3191 t += UTF8SKIP(t);
a0d0e21e 3192 }
3280af22 3193 while (t < PL_bufend && isSPACE(*t))
a0d0e21e 3194 t++;
b8a4b1be
GS
3195 /* if comma follows first term, call it an anon hash */
3196 /* XXX it could be a comma expression with loop modifiers */
3280af22 3197 if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
b8a4b1be 3198 || (*t == '=' && t[1] == '>')))
a0d0e21e 3199 OPERATOR(HASHBRACK);
3280af22 3200 if (PL_expect == XREF)
4e4e412b 3201 PL_expect = XTERM;
a0d0e21e 3202 else {
3280af22
NIS
3203 PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
3204 PL_expect = XSTATE;
a0d0e21e 3205 }
8990e307 3206 }
a0d0e21e 3207 break;
463ee0b2 3208 }
57843af0 3209 yylval.ival = CopLINE(PL_curcop);
79072805 3210 if (isSPACE(*s) || *s == '#')
3280af22 3211 PL_copline = NOLINE; /* invalidate current command line number */
79072805 3212 TOKEN('{');
378cc40b 3213 case '}':
79072805
LW
3214 rightbracket:
3215 s++;
3280af22 3216 if (PL_lex_brackets <= 0)
d98d5fff 3217 yyerror("Unmatched right curly bracket");
463ee0b2 3218 else
3280af22 3219 PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
c2e66d9e 3220 if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL)
3280af22
NIS
3221 PL_lex_formbrack = 0;
3222 if (PL_lex_state == LEX_INTERPNORMAL) {
3223 if (PL_lex_brackets == 0) {
9059aa12
LW
3224 if (PL_expect & XFAKEBRACK) {
3225 PL_expect &= XENUMMASK;
3280af22
NIS
3226 PL_lex_state = LEX_INTERPEND;
3227 PL_bufptr = s;
cea2e8a9 3228 return yylex(); /* ignore fake brackets */
79072805 3229 }
fa83b5b6 3230 if (*s == '-' && s[1] == '>')
3280af22 3231 PL_lex_state = LEX_INTERPENDMAYBE;
fa83b5b6 3232 else if (*s != '[' && *s != '{')
3280af22 3233 PL_lex_state = LEX_INTERPEND;
79072805
LW
3234 }
3235 }
9059aa12
LW
3236 if (PL_expect & XFAKEBRACK) {
3237 PL_expect &= XENUMMASK;
3280af22 3238 PL_bufptr = s;
cea2e8a9 3239 return yylex(); /* ignore fake brackets */
748a9306 3240 }
79072805
LW
3241 force_next('}');
3242 TOKEN(';');
378cc40b
LW
3243 case '&':
3244 s++;
3245 tmp = *s++;
3246 if (tmp == '&')
a0d0e21e 3247 AOPERATOR(ANDAND);
378cc40b 3248 s--;
3280af22 3249 if (PL_expect == XOPERATOR) {
7e2040f0
GS
3250 if (ckWARN(WARN_SEMICOLON)
3251 && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
3252 {
57843af0 3253 CopLINE_dec(PL_curcop);
cea2e8a9 3254 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
57843af0 3255 CopLINE_inc(PL_curcop);
463ee0b2 3256 }
79072805 3257 BAop(OP_BIT_AND);
463ee0b2 3258 }
79072805 3259
3280af22
NIS
3260 s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
3261 if (*PL_tokenbuf) {
3262 PL_expect = XOPERATOR;
3263 force_ident(PL_tokenbuf, '&');
463ee0b2 3264 }
79072805
LW
3265 else
3266 PREREF('&');
c07a80fd 3267 yylval.ival = (OPpENTERSUB_AMPER<<8);
79072805
LW
3268 TERM('&');
3269
378cc40b
LW
3270 case '|':
3271 s++;
3272 tmp = *s++;
3273 if (tmp == '|')
a0d0e21e 3274 AOPERATOR(OROR);
378cc40b 3275 s--;
79072805 3276 BOop(OP_BIT_OR);
378cc40b
LW
3277 case '=':
3278 s++;
3279 tmp = *s++;
3280 if (tmp == '=')
79072805
LW
3281 Eop(OP_EQ);
3282 if (tmp == '>')
3283 OPERATOR(',');
378cc40b 3284 if (tmp == '~')
79072805 3285 PMop(OP_MATCH);
599cee73 3286 if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
cea2e8a9 3287 Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
378cc40b 3288 s--;
3280af22
NIS
3289 if (PL_expect == XSTATE && isALPHA(tmp) &&
3290 (s == PL_linestart+1 || s[-2] == '\n') )
748a9306 3291 {
3280af22
NIS
3292 if (PL_in_eval && !PL_rsfp) {
3293 d = PL_bufend;
a5f75d66
AD
3294 while (s < d) {
3295 if (*s++ == '\n') {
3296 incline(s);
3297 if (strnEQ(s,"=cut",4)) {
3298 s = strchr(s,'\n');
3299 if (s)
3300 s++;
3301 else
3302 s = d;
3303 incline(s);
3304 goto retry;
3305 }
3306 }
3307 }
3308 goto retry;
3309 }
3280af22
NIS
3310 s = PL_bufend;
3311 PL_doextract = TRUE;
a0d0e21e
LW
3312 goto retry;
3313 }
3280af22 3314 if (PL_lex_brackets < PL_lex_formbrack) {
a0d0e21e 3315 char *t;
51882d45 3316#ifdef PERL_STRICT_CR
bf4acbe4 3317 for (t = s; SPACE_OR_TAB(*t); t++) ;
51882d45 3318#else
bf4acbe4 3319 for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
51882d45 3320#endif
a0d0e21e
LW
3321 if (*t == '\n' || *t == '#') {
3322 s--;
3280af22 3323 PL_expect = XBLOCK;
a0d0e21e
LW
3324 goto leftbracket;
3325 }
79072805 3326 }
a0d0e21e
LW
3327 yylval.ival = 0;
3328 OPERATOR(ASSIGNOP);
378cc40b
LW
3329 case '!':
3330 s++;
3331 tmp = *s++;
3332 if (tmp == '=')
79072805 3333 Eop(OP_NE);
378cc40b 3334 if (tmp == '~')
79072805 3335 PMop(OP_NOT);
378cc40b
LW
3336 s--;
3337 OPERATOR('!');
3338 case '<':
3280af22 3339 if (PL_expect != XOPERATOR) {
93a17b20 3340 if (s[1] != '<' && !strchr(s,'>'))
2f3197b3 3341 check_uni();
79072805
LW
3342 if (s[1] == '<')
3343 s = scan_heredoc(s);
3344 else
3345 s = scan_inputsymbol(s);
3346 TERM(sublex_start());
378cc40b
LW
3347 }
3348 s++;
3349 tmp = *s++;
3350 if (tmp == '<')
79072805 3351 SHop(OP_LEFT_SHIFT);
395c3793
LW
3352 if (tmp == '=') {
3353 tmp = *s++;
3354 if (tmp == '>')
79072805 3355 Eop(OP_NCMP);
395c3793 3356 s--;
79072805 3357 Rop(OP_LE);
395c3793 3358 }
378cc40b 3359 s--;
79072805 3360 Rop(OP_LT);
378cc40b
LW
3361 case '>':
3362 s++;
3363 tmp = *s++;
3364 if (tmp == '>')
79072805 3365 SHop(OP_RIGHT_SHIFT);
378cc40b 3366 if (tmp == '=')
79072805 3367 Rop(OP_GE);
378cc40b 3368 s--;
79072805 3369 Rop(OP_GT);
378cc40b
LW
3370
3371 case '$':
bbce6d69 3372 CLINE;
3373
3280af22
NIS
3374 if (PL_expect == XOPERATOR) {
3375 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3376 PL_expect = XTERM;
a0d0e21e 3377 depcom();
bbce6d69 3378 return ','; /* grandfather non-comma-format format */
a0d0e21e 3379 }
8990e307 3380 }
a0d0e21e 3381
7e2040f0 3382 if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) {
3280af22 3383 PL_tokenbuf[0] = '@';
376b8730
SM
3384 s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1,
3385 sizeof PL_tokenbuf - 1, FALSE);
3386 if (PL_expect == XOPERATOR)
3387 no_op("Array length", s);
3280af22 3388 if (!PL_tokenbuf[1])
a0d0e21e 3389 PREREF(DOLSHARP);
3280af22
NIS
3390 PL_expect = XOPERATOR;
3391 PL_pending_ident = '#';
463ee0b2 3392 TOKEN(DOLSHARP);
79072805 3393 }
bbce6d69 3394
3280af22 3395 PL_tokenbuf[0] = '$';
376b8730
SM
3396 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1,
3397 sizeof PL_tokenbuf - 1, FALSE);
3398 if (PL_expect == XOPERATOR)
3399 no_op("Scalar", s);
3280af22
NIS
3400 if (!PL_tokenbuf[1]) {
3401 if (s == PL_bufend)
bbce6d69 3402 yyerror("Final $ should be \\$ or $name");
3403 PREREF('$');
8990e307 3404 }
a0d0e21e 3405
bbce6d69 3406 /* This kludge not intended to be bulletproof. */
3280af22 3407 if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
bbce6d69 3408 yylval.opval = newSVOP(OP_CONST, 0,
b448e4fe 3409 newSViv(PL_compiling.cop_arybase));
bbce6d69 3410 yylval.opval->op_private = OPpCONST_ARYBASE;
3411 TERM(THING);
3412 }
3413
ff68c719 3414 d = s;
69d2bceb 3415 tmp = (I32)*s;
3280af22 3416 if (PL_lex_state == LEX_NORMAL)
ff68c719 3417 s = skipspace(s);
3418
3280af22 3419 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
bbce6d69 3420 char *t;
3421 if (*s == '[') {
3280af22 3422 PL_tokenbuf[0] = '@';
599cee73 3423 if (ckWARN(WARN_SYNTAX)) {
bbce6d69 3424 for(t = s + 1;
7e2040f0 3425 isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$';
bbce6d69 3426 t++) ;
a0d0e21e 3427 if (*t++ == ',') {
3280af22
NIS
3428 PL_bufptr = skipspace(PL_bufptr);
3429 while (t < PL_bufend && *t != ']')
bbce6d69 3430 t++;
cea2e8a9 3431 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73
PM
3432 "Multidimensional syntax %.*s not supported",
3433 (t - PL_bufptr) + 1, PL_bufptr);
a0d0e21e
LW
3434 }
3435 }
bbce6d69 3436 }
3437 else if (*s == '{') {
3280af22 3438 PL_tokenbuf[0] = '%';
599cee73 3439 if (ckWARN(WARN_SYNTAX) && strEQ(PL_tokenbuf+1, "SIG") &&
bbce6d69 3440 (t = strchr(s, '}')) && (t = strchr(t, '=')))
3441 {
3280af22 3442 char tmpbuf[sizeof PL_tokenbuf];
a0d0e21e
LW
3443 STRLEN len;
3444 for (t++; isSPACE(*t); t++) ;
7e2040f0 3445 if (isIDFIRST_lazy_if(t,UTF)) {
8903cb82 3446 t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
59a6d928 3447 for (; isSPACE(*t); t++) ;
864dbfa3 3448 if (*t == ';' && get_cv(tmpbuf, FALSE))
cea2e8a9 3449 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 3450 "You need to quote \"%s\"", tmpbuf);
748a9306 3451 }
93a17b20
LW
3452 }
3453 }
2f3197b3 3454 }
bbce6d69 3455
3280af22 3456 PL_expect = XOPERATOR;
69d2bceb 3457 if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) {
3280af22
NIS
3458 bool islop = (PL_last_lop == PL_oldoldbufptr);
3459 if (!islop || PL_last_lop_op == OP_GREPSTART)
3460 PL_expect = XOPERATOR;
bbce6d69 3461 else if (strchr("$@\"'`q", *s))
3280af22 3462 PL_expect = XTERM; /* e.g. print $fh "foo" */
7e2040f0 3463 else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF))
3280af22 3464 PL_expect = XTERM; /* e.g. print $fh &sub */
7e2040f0 3465 else if (isIDFIRST_lazy_if(s,UTF)) {
3280af22 3466 char tmpbuf[sizeof PL_tokenbuf];
8903cb82 3467 scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
155aba94 3468 if ((tmp = keyword(tmpbuf, len))) {
84902520
TB
3469 /* binary operators exclude handle interpretations */
3470 switch (tmp) {
3471 case -KEY_x:
3472 case -KEY_eq:
3473 case -KEY_ne:
3474 case -KEY_gt:
3475 case -KEY_lt:
3476 case -KEY_ge:
3477 case -KEY_le:
3478 case -KEY_cmp:
3479 break;
3480 default:
3280af22 3481 PL_expect = XTERM; /* e.g. print $fh length() */
84902520
TB
3482 break;
3483 }
3484 }
68dc0745 3485 else {
3486 GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
3487 if (gv && GvCVu(gv))
3280af22 3488 PL_expect = XTERM; /* e.g. print $fh subr() */
93a17b20 3489 }
93a17b20 3490 }
bbce6d69 3491 else if (isDIGIT(*s))
3280af22 3492 PL_expect = XTERM; /* e.g. print $fh 3 */
bbce6d69 3493 else if (*s == '.' && isDIGIT(s[1]))
3280af22 3494 PL_expect = XTERM; /* e.g. print $fh .3 */
e0587a03 3495 else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
3280af22 3496 PL_expect = XTERM; /* e.g. print $fh -1 */
e0587a03 3497 else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
3280af22 3498 PL_expect = XTERM; /* print $fh <<"EOF" */
bbce6d69 3499 }
3280af22 3500 PL_pending_ident = '$';
79072805 3501 TOKEN('$');
378cc40b
LW
3502
3503 case '@':
3280af22 3504 if (PL_expect == XOPERATOR)
bbce6d69 3505 no_op("Array", s);
3280af22
NIS
3506 PL_tokenbuf[0] = '@';
3507 s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
3508 if (!PL_tokenbuf[1]) {
3509 if (s == PL_bufend)
bbce6d69 3510 yyerror("Final @ should be \\@ or @name");
3511 PREREF('@');
3512 }
3280af22 3513 if (PL_lex_state == LEX_NORMAL)
ff68c719 3514 s = skipspace(s);
3280af22 3515 if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
bbce6d69 3516 if (*s == '{')
3280af22 3517 PL_tokenbuf[0] = '%';
a0d0e21e
LW
3518
3519 /* Warn about @ where they meant $. */
599cee73 3520 if (ckWARN(WARN_SYNTAX)) {
a0d0e21e
LW
3521 if (*s == '[' || *s == '{') {
3522 char *t = s + 1;
7e2040f0 3523 while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t)))
a0d0e21e
LW
3524 t++;
3525 if (*t == '}' || *t == ']') {
3526 t++;
3280af22 3527 PL_bufptr = skipspace(PL_bufptr);
cea2e8a9 3528 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 3529 "Scalar value %.*s better written as $%.*s",
3280af22 3530 t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
a0d0e21e 3531 }
93a17b20
LW
3532 }
3533 }
463ee0b2 3534 }
3280af22 3535 PL_pending_ident = '@';
79072805 3536 TERM('@');
378cc40b
LW
3537
3538 case '/': /* may either be division or pattern */
3539 case '?': /* may either be conditional or pattern */
3280af22 3540 if (PL_expect != XOPERATOR) {
c277df42 3541 /* Disable warning on "study /blah/" */
4e553d73
NIS
3542 if (PL_oldoldbufptr == PL_last_uni
3543 && (*PL_last_uni != 's' || s - PL_last_uni < 5
7e2040f0
GS
3544 || memNE(PL_last_uni, "study", 5)
3545 || isALNUM_lazy_if(PL_last_uni+5,UTF)))
c277df42 3546 check_uni();
8782bef2 3547 s = scan_pat(s,OP_MATCH);
79072805 3548 TERM(sublex_start());
378cc40b
LW
3549 }
3550 tmp = *s++;
a687059c 3551 if (tmp == '/')
79072805 3552 Mop(OP_DIVIDE);
378cc40b
LW
3553 OPERATOR(tmp);
3554
3555 case '.':
51882d45
GS
3556 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
3557#ifdef PERL_STRICT_CR
3558 && s[1] == '\n'
3559#else
3560 && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
3561#endif
3562 && (s == PL_linestart || s[-1] == '\n') )
3563 {
3280af22
NIS
3564 PL_lex_formbrack = 0;
3565 PL_expect = XSTATE;
79072805
LW
3566 goto rightbracket;
3567 }
3280af22 3568 if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
378cc40b 3569 tmp = *s++;
a687059c
LW
3570 if (*s == tmp) {
3571 s++;
2f3197b3
LW
3572 if (*s == tmp) {
3573 s++;
79072805 3574 yylval.ival = OPf_SPECIAL;
2f3197b3
LW
3575 }
3576 else
79072805 3577 yylval.ival = 0;
378cc40b 3578 OPERATOR(DOTDOT);
a687059c 3579 }
3280af22 3580 if (PL_expect != XOPERATOR)
2f3197b3 3581 check_uni();
79072805 3582 Aop(OP_CONCAT);
378cc40b
LW
3583 }
3584 /* FALL THROUGH */
3585 case '0': case '1': case '2': case '3': case '4':
3586 case '5': case '6': case '7': case '8': case '9':
b73d6f50 3587 s = scan_num(s, &yylval);
4e553d73 3588 DEBUG_T( { PerlIO_printf(Perl_debug_log,
607df283 3589 "### Saw number in '%s'\n", s);
5f80b19c 3590 } );
3280af22 3591 if (PL_expect == XOPERATOR)
8990e307 3592 no_op("Number",s);
79072805
LW
3593 TERM(THING);
3594
3595 case '\'':
09bef843 3596 s = scan_str(s,FALSE,FALSE);
4e553d73 3597 DEBUG_T( { PerlIO_printf(Perl_debug_log,
207e3d1a 3598 "### Saw string before '%s'\n", s);
5f80b19c 3599 } );
3280af22
NIS
3600 if (PL_expect == XOPERATOR) {
3601 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3602 PL_expect = XTERM;
a0d0e21e
LW
3603 depcom();
3604 return ','; /* grandfather non-comma-format format */
3605 }
463ee0b2 3606 else
8990e307 3607 no_op("String",s);
463ee0b2 3608 }
79072805 3609 if (!s)
85e6fe83 3610 missingterm((char*)0);
79072805
LW
3611 yylval.ival = OP_CONST;
3612 TERM(sublex_start());
3613
3614 case '"':
09bef843 3615 s = scan_str(s,FALSE,FALSE);
4e553d73 3616 DEBUG_T( { PerlIO_printf(Perl_debug_log,
207e3d1a 3617 "### Saw string before '%s'\n", s);
5f80b19c 3618 } );
3280af22
NIS
3619 if (PL_expect == XOPERATOR) {
3620 if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
3621 PL_expect = XTERM;
a0d0e21e
LW
3622 depcom();
3623 return ','; /* grandfather non-comma-format format */
3624 }
463ee0b2 3625 else
8990e307 3626 no_op("String",s);
463ee0b2 3627 }
79072805 3628 if (!s)
85e6fe83 3629 missingterm((char*)0);
4633a7c4 3630 yylval.ival = OP_CONST;
3280af22 3631 for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
63cd0674 3632 if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) {
4633a7c4
LW
3633 yylval.ival = OP_STRINGIFY;
3634 break;
3635 }
3636 }
79072805
LW
3637 TERM(sublex_start());
3638
3639 case '`':
09bef843 3640 s = scan_str(s,FALSE,FALSE);
4e553d73 3641 DEBUG_T( { PerlIO_printf(Perl_debug_log,
207e3d1a 3642 "### Saw backtick string before '%s'\n", s);
5f80b19c 3643 } );
3280af22 3644 if (PL_expect == XOPERATOR)
8990e307 3645 no_op("Backticks",s);
79072805 3646 if (!s)
85e6fe83 3647 missingterm((char*)0);
79072805
LW
3648 yylval.ival = OP_BACKTICK;
3649 set_csh();
3650 TERM(sublex_start());
3651
3652 case '\\':
3653 s++;
599cee73 3654 if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
cea2e8a9 3655 Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
599cee73 3656 *s, *s);
3280af22 3657 if (PL_expect == XOPERATOR)
8990e307 3658 no_op("Backslash",s);
79072805
LW
3659 OPERATOR(REFGEN);
3660
a7cb1f99 3661 case 'v':
e526c9e6 3662 if (isDIGIT(s[1]) && PL_expect != XOPERATOR) {
a7cb1f99
GS
3663 char *start = s;
3664 start++;
3665 start++;
dd629d5b 3666 while (isDIGIT(*start) || *start == '_')
a7cb1f99
GS
3667 start++;
3668 if (*start == '.' && isDIGIT(start[1])) {
b73d6f50 3669 s = scan_num(s, &yylval);
a7cb1f99
GS
3670 TERM(THING);
3671 }
e526c9e6 3672 /* avoid v123abc() or $h{v1}, allow C<print v10;> */
62ec34bd 3673 else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF || PL_expect == XSTATE)) {
e526c9e6
GS
3674 char c = *start;
3675 GV *gv;
3676 *start = '\0';
3677 gv = gv_fetchpv(s, FALSE, SVt_PVCV);
3678 *start = c;
3679 if (!gv) {
b73d6f50 3680 s = scan_num(s, &yylval);
e526c9e6
GS
3681 TERM(THING);
3682 }
3683 }
a7cb1f99
GS
3684 }
3685 goto keylookup;
79072805 3686 case 'x':
3280af22 3687 if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
79072805
LW
3688 s++;
3689 Mop(OP_REPEAT);
2f3197b3 3690 }
79072805
LW
3691 goto keylookup;
3692
378cc40b 3693 case '_':
79072805
LW
3694 case 'a': case 'A':
3695 case 'b': case 'B':
3696 case 'c': case 'C':
3697 case 'd': case 'D':
3698 case 'e': case 'E':
3699 case 'f': case 'F':
3700 case 'g': case 'G':
3701 case 'h': case 'H':
3702 case 'i': case 'I':
3703 case 'j': case 'J':
3704 case 'k': case 'K':
3705 case 'l': case 'L':
3706 case 'm': case 'M':
3707 case 'n': case 'N':
3708 case 'o': case 'O':
3709 case 'p': case 'P':
3710 case 'q': case 'Q':
3711 case 'r': case 'R':
3712 case 's': case 'S':
3713 case 't': case 'T':
3714 case 'u': case 'U':
a7cb1f99 3715 case 'V':
79072805
LW
3716 case 'w': case 'W':
3717 case 'X':
3718 case 'y': case 'Y':
3719 case 'z': case 'Z':
3720
49dc05e3 3721 keylookup: {
161b471a
NIS
3722 gv = Nullgv;
3723 gvp = 0;
49dc05e3 3724
3280af22
NIS
3725 PL_bufptr = s;
3726 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
8ebc5c01 3727
3728 /* Some keywords can be followed by any delimiter, including ':' */
155aba94
GS
3729 tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) ||
3730 (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
3731 (PL_tokenbuf[0] == 'q' &&
3732 strchr("qwxr", PL_tokenbuf[1])))));
8ebc5c01 3733
3734 /* x::* is just a word, unless x is "CORE" */
3280af22 3735 if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
4633a7c4
LW
3736 goto just_a_word;
3737
3643fb5f 3738 d = s;
3280af22 3739 while (d < PL_bufend && isSPACE(*d))
3643fb5f
CS
3740 d++; /* no comments skipped here, or s### is misparsed */
3741
3742 /* Is this a label? */
3280af22
NIS
3743 if (!tmp && PL_expect == XSTATE
3744 && d < PL_bufend && *d == ':' && *(d + 1) != ':') {
8ebc5c01 3745 s = d + 1;
3280af22 3746 yylval.pval = savepv(PL_tokenbuf);
8ebc5c01 3747 CLINE;
3748 TOKEN(LABEL);
3643fb5f
CS
3749 }
3750
3751 /* Check for keywords */
3280af22 3752 tmp = keyword(PL_tokenbuf, len);
748a9306
LW
3753
3754 /* Is this a word before a => operator? */
1c3923b3 3755 if (*d == '=' && d[1] == '>') {
748a9306 3756 CLINE;
3280af22 3757 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
748a9306 3758 yylval.opval->op_private = OPpCONST_BARE;
0064a8a9 3759 if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len))
7948272d 3760 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
748a9306
LW
3761 TERM(WORD);
3762 }
3763
a0d0e21e 3764 if (tmp < 0) { /* second-class keyword? */
56f7f34b
CS
3765 GV *ogv = Nullgv; /* override (winner) */
3766 GV *hgv = Nullgv; /* hidden (loser) */
3280af22 3767 if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
56f7f34b 3768 CV *cv;
3280af22 3769 if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
56f7f34b
CS
3770 (cv = GvCVu(gv)))
3771 {
3772 if (GvIMPORTED_CV(gv))
3773 ogv = gv;
3774 else if (! CvMETHOD(cv))
3775 hgv = gv;
3776 }
3777 if (!ogv &&
3280af22
NIS
3778 (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
3779 (gv = *gvp) != (GV*)&PL_sv_undef &&
56f7f34b
CS
3780 GvCVu(gv) && GvIMPORTED_CV(gv))
3781 {
3782 ogv = gv;
3783 }
3784 }
3785 if (ogv) {
3786 tmp = 0; /* overridden by import or by GLOBAL */
6e7b2336
GS
3787 }
3788 else if (gv && !gvp
3789 && -tmp==KEY_lock /* XXX generalizable kludge */
d0456cad 3790 && GvCVu(gv)
3280af22 3791 && !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
6e7b2336
GS
3792 {
3793 tmp = 0; /* any sub overrides "weak" keyword */
a0d0e21e 3794 }
56f7f34b
CS
3795 else { /* no override */
3796 tmp = -tmp;
3797 gv = Nullgv;
3798 gvp = 0;
4944e2f7
GS
3799 if (ckWARN(WARN_AMBIGUOUS) && hgv
3800 && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
cea2e8a9 3801 Perl_warner(aTHX_ WARN_AMBIGUOUS,
599cee73 3802 "Ambiguous call resolved as CORE::%s(), %s",
2f3ca594 3803 GvENAME(hgv), "qualify as such or use &");
49dc05e3 3804 }
a0d0e21e
LW
3805 }
3806
3807 reserved_word:
3808 switch (tmp) {
79072805
LW
3809
3810 default: /* not a keyword */
93a17b20 3811 just_a_word: {
96e4d5b1 3812 SV *sv;
ce29ac45 3813 int pkgname = 0;
3280af22 3814 char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
8990e307
LW
3815
3816 /* Get the rest if it looks like a package qualifier */
3817
155aba94 3818 if (*s == '\'' || (*s == ':' && s[1] == ':')) {
c3e0f903 3819 STRLEN morelen;
3280af22 3820 s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
c3e0f903
GS
3821 TRUE, &morelen);
3822 if (!morelen)
cea2e8a9 3823 Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf,
ec2ab091 3824 *s == '\'' ? "'" : "::");
c3e0f903 3825 len += morelen;
ce29ac45 3826 pkgname = 1;
a0d0e21e 3827 }
8990e307 3828
3280af22
NIS
3829 if (PL_expect == XOPERATOR) {
3830 if (PL_bufptr == PL_linestart) {
57843af0 3831 CopLINE_dec(PL_curcop);
cea2e8a9 3832 Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
57843af0 3833 CopLINE_inc(PL_curcop);
463ee0b2
LW
3834 }
3835 else
54310121 3836 no_op("Bareword",s);
463ee0b2 3837 }
8990e307 3838
c3e0f903
GS
3839 /* Look for a subroutine with this name in current package,
3840 unless name is "Foo::", in which case Foo is a bearword
3841 (and a package name). */
3842
3843 if (len > 2 &&
3280af22 3844 PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
c3e0f903 3845 {
e476b1b5 3846 if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
4e553d73 3847 Perl_warner(aTHX_ WARN_BAREWORD,
599cee73 3848 "Bareword \"%s\" refers to nonexistent package",
3280af22 3849 PL_tokenbuf);
c3e0f903 3850 len -= 2;
3280af22 3851 PL_tokenbuf[len] = '\0';
c3e0f903
GS
3852 gv = Nullgv;
3853 gvp = 0;
3854 }
3855 else {
3856 len = 0;
3857 if (!gv)
3280af22 3858 gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
c3e0f903
GS
3859 }
3860
3861 /* if we saw a global override before, get the right name */
8990e307 3862
49dc05e3 3863 if (gvp) {
79cb57f6 3864 sv = newSVpvn("CORE::GLOBAL::",14);
3280af22 3865 sv_catpv(sv,PL_tokenbuf);
49dc05e3
GS
3866 }
3867 else
3280af22 3868 sv = newSVpv(PL_tokenbuf,0);
8990e307 3869
a0d0e21e
LW
3870 /* Presume this is going to be a bareword of some sort. */
3871
3872 CLINE;
49dc05e3 3873 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
a0d0e21e
LW
3874 yylval.opval->op_private = OPpCONST_BARE;
3875
c3e0f903
GS
3876 /* And if "Foo::", then that's what it certainly is. */
3877
3878 if (len)
3879 goto safe_bareword;
3880
8990e307
LW
3881 /* See if it's the indirect object for a list operator. */
3882
3280af22
NIS
3883 if (PL_oldoldbufptr &&
3884 PL_oldoldbufptr < PL_bufptr &&
65cec589
GS
3885 (PL_oldoldbufptr == PL_last_lop
3886 || PL_oldoldbufptr == PL_last_uni) &&
a0d0e21e 3887 /* NO SKIPSPACE BEFORE HERE! */
a9ef352a
GS
3888 (PL_expect == XREF ||
3889 ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF))
a0d0e21e 3890 {
748a9306
LW
3891 bool immediate_paren = *s == '(';
3892
a0d0e21e
LW
3893 /* (Now we can afford to cross potential line boundary.) */
3894 s = skipspace(s);
3895
3896 /* Two barewords in a row may indicate method call. */
3897
7e2040f0 3898 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp=intuit_method(s,gv)))
a0d0e21e
LW
3899 return tmp;
3900
3901 /* If not a declared subroutine, it's an indirect object. */
3902 /* (But it's an indir obj regardless for sort.) */
3903
7948272d 3904 if ( !immediate_paren && (PL_last_lop_op == OP_SORT ||
f0670693 3905 ((!gv || !GvCVu(gv)) &&
a9ef352a 3906 (PL_last_lop_op != OP_MAPSTART &&
f0670693 3907 PL_last_lop_op != OP_GREPSTART))))
a9ef352a 3908 {
3280af22 3909 PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
748a9306 3910 goto bareword;
93a17b20
LW
3911 }
3912 }
8990e307 3913
3280af22 3914 PL_expect = XOPERATOR;
8990e307 3915 s = skipspace(s);
1c3923b3
GS
3916
3917 /* Is this a word before a => operator? */
ce29ac45 3918 if (*s == '=' && s[1] == '>' && !pkgname) {
1c3923b3
GS
3919 CLINE;
3920 sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf);
0064a8a9 3921 if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len))
7948272d 3922 SvUTF8_on(((SVOP*)yylval.opval)->op_sv);
1c3923b3
GS
3923 TERM(WORD);
3924 }
3925
3926 /* If followed by a paren, it's certainly a subroutine. */
93a17b20 3927 if (*s == '(') {
79072805 3928 CLINE;
96e4d5b1 3929 if (gv && GvCVu(gv)) {
bf4acbe4 3930 for (d = s + 1; SPACE_OR_TAB(*d); d++) ;
7a52d87a 3931 if (*d == ')' && (sv = cv_const_sv(GvCV(gv)))) {
96e4d5b1 3932 s = d + 1;
3933 goto its_constant;
3934 }
3935 }
3280af22
NIS
3936 PL_nextval[PL_nexttoke].opval = yylval.opval;
3937 PL_expect = XOPERATOR;
93a17b20 3938 force_next(WORD);
c07a80fd 3939 yylval.ival = 0;
463ee0b2 3940 TOKEN('&');
79072805 3941 }
93a17b20 3942
a0d0e21e 3943 /* If followed by var or block, call it a method (unless sub) */
8990e307 3944
8ebc5c01 3945 if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
3280af22
NIS
3946 PL_last_lop = PL_oldbufptr;
3947 PL_last_lop_op = OP_METHOD;
93a17b20 3948 PREBLOCK(METHOD);
463ee0b2
LW
3949 }
3950
8990e307
LW
3951 /* If followed by a bareword, see if it looks like indir obj. */
3952
7e2040f0 3953 if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
a0d0e21e 3954 return tmp;
93a17b20 3955
8990e307
LW
3956 /* Not a method, so call it a subroutine (if defined) */
3957
8ebc5c01 3958 if (gv && GvCVu(gv)) {
46fc3d4c 3959 CV* cv;
0453d815
PM
3960 if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
3961 Perl_warner(aTHX_ WARN_AMBIGUOUS,
3962 "Ambiguous use of -%s resolved as -&%s()",
3280af22 3963 PL_tokenbuf, PL_tokenbuf);
89bfa8cd 3964 /* Check for a constant sub */
46fc3d4c 3965 cv = GvCV(gv);
96e4d5b1 3966 if ((sv = cv_const_sv(cv))) {
3967 its_constant:
3968 SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
3969 ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
3970 yylval.opval->op_private = 0;
3971 TOKEN(WORD);
89bfa8cd 3972 }
3973
a5f75d66
AD
3974 /* Resolve to GV now. */
3975 op_free(yylval.opval);
3976 yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
9675f7ac 3977 yylval.opval->op_private |= OPpENTERSUB_NOPAREN;
7a52d87a 3978 PL_last_lop = PL_oldbufptr;
bf848113 3979 PL_last_lop_op = OP_ENTERSUB;
4633a7c4
LW
3980 /* Is there a prototype? */
3981 if (SvPOK(cv)) {
3982 STRLEN len;
7a52d87a 3983 char *proto = SvPV((SV*)cv, len);
4633a7c4
LW
3984 if (!len)
3985 TERM(FUNC0SUB);
7a52d87a 3986 if (strEQ(proto, "$"))
4633a7c4 3987 OPERATOR(UNIOPSUB);
7a52d87a 3988 if (*proto == '&' && *s == '{') {
3280af22 3989 sv_setpv(PL_subname,"__ANON__");
4633a7c4
LW
3990 PREBLOCK(LSTOPSUB);
3991 }
a9ef352a 3992 }
3280af22
NIS
3993 PL_nextval[PL_nexttoke].opval = yylval.opval;
3994 PL_expect = XTERM;
8990e307
LW
3995 force_next(WORD);
3996 TOKEN(NOAMP);
3997 }
748a9306 3998
8990e307
LW
3999 /* Call it a bare word */
4000
5603f27d
GS
4001 if (PL_hints & HINT_STRICT_SUBS)
4002 yylval.opval->op_private |= OPpCONST_STRICT;
4003 else {
4004 bareword:
4005 if (ckWARN(WARN_RESERVED)) {
4006 if (lastchar != '-') {
4007 for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
9bbb1ada 4008 if (!*d && strNE(PL_tokenbuf,"main"))
cea2e8a9 4009 Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
5603f27d
GS
4010 PL_tokenbuf);
4011 }
748a9306
LW
4012 }
4013 }
c3e0f903
GS
4014
4015 safe_bareword:
f248d071 4016 if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
0453d815
PM
4017 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4018 "Operator or semicolon missing before %c%s",
3280af22 4019 lastchar, PL_tokenbuf);
0453d815
PM
4020 Perl_warner(aTHX_ WARN_AMBIGUOUS,
4021 "Ambiguous use of %c resolved as operator %c",
748a9306
LW
4022 lastchar, lastchar);
4023 }
93a17b20 4024 TOKEN(WORD);
79072805 4025 }
79072805 4026
68dc0745 4027 case KEY___FILE__:
46fc3d4c 4028 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
ed094faf 4029 newSVpv(CopFILE(PL_curcop),0));
46fc3d4c 4030 TERM(THING);
4031
79072805 4032 case KEY___LINE__:
cf2093f6 4033 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
57843af0 4034 Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop)));
79072805 4035 TERM(THING);
68dc0745 4036
4037 case KEY___PACKAGE__:
4038 yylval.opval = (OP*)newSVOP(OP_CONST, 0,
3280af22
NIS
4039 (PL_curstash
4040 ? newSVsv(PL_curstname)
4041 : &PL_sv_undef));
79072805 4042 TERM(THING);
79072805 4043
e50aee73 4044 case KEY___DATA__:
79072805
LW
4045 case KEY___END__: {
4046 GV *gv;
79072805
LW
4047
4048 /*SUPPRESS 560*/
3280af22 4049 if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
e50aee73 4050 char *pname = "main";
3280af22
NIS
4051 if (PL_tokenbuf[2] == 'D')
4052 pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
cea2e8a9 4053 gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);
a5f75d66 4054 GvMULTI_on(gv);
79072805 4055 if (!GvIO(gv))
a0d0e21e 4056 GvIOp(gv) = newIO();
3280af22 4057 IoIFP(GvIOp(gv)) = PL_rsfp;
a0d0e21e
LW
4058#if defined(HAS_FCNTL) && defined(F_SETFD)
4059 {
3280af22 4060 int fd = PerlIO_fileno(PL_rsfp);
a0d0e21e
LW
4061 fcntl(fd,F_SETFD,fd >= 3);
4062 }
79072805 4063#endif
fd049845 4064 /* Mark this internal pseudo-handle as clean */
4065 IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
3280af22 4066 if (PL_preprocess)
50952442 4067 IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;
3280af22 4068 else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
50952442 4069 IoTYPE(GvIOp(gv)) = IoTYPE_STD;
79072805 4070 else
50952442 4071 IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;
c39cd008
GS
4072#if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS)
4073 /* if the script was opened in binmode, we need to revert
53129d29 4074 * it to text mode for compatibility; but only iff it has CRs
c39cd008 4075 * XXX this is a questionable hack at best. */
53129d29
GS
4076 if (PL_bufend-PL_bufptr > 2
4077 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r')
c39cd008
GS
4078 {
4079 Off_t loc = 0;
50952442 4080 if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) {
c39cd008
GS
4081 loc = PerlIO_tell(PL_rsfp);
4082 (void)PerlIO_seek(PL_rsfp, 0L, 0);
4083 }
2986a63f
JH
4084#ifdef NETWARE
4085 if (PerlLIO_setmode(PL_rsfp, O_TEXT) != -1) {
4086#else
c39cd008 4087 if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) {
2986a63f 4088#endif /* NETWARE */
1143fce0
JH
4089#ifdef PERLIO_IS_STDIO /* really? */
4090# if defined(__BORLANDC__)
cb359b41
JH
4091 /* XXX see note in do_binmode() */
4092 ((FILE*)PL_rsfp)->flags &= ~_F_BIN;
1143fce0
JH
4093# endif
4094#endif
c39cd008
GS
4095 if (loc > 0)
4096 PerlIO_seek(PL_rsfp, loc, 0);
4097 }
4098 }
4099#endif
7948272d 4100#ifdef PERLIO_LAYERS
0064a8a9 4101 if (UTF && !IN_BYTES)
7948272d
NIS
4102 PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8");
4103#endif
3280af22 4104 PL_rsfp = Nullfp;
79072805
LW
4105 }
4106 goto fake_eof;
e929a76b 4107 }
de3bb511 4108
8990e307 4109 case KEY_AUTOLOAD:
ed6116ce 4110 case KEY_DESTROY:
79072805 4111 case KEY_BEGIN:
7d30b5c4 4112 case KEY_CHECK:
7d07dbc2 4113 case KEY_INIT:
7d30b5c4 4114 case KEY_END:
3280af22
NIS
4115 if (PL_expect == XSTATE) {
4116 s = PL_bufptr;
93a17b20 4117 goto really_sub;
79072805
LW
4118 }
4119 goto just_a_word;
4120
a0d0e21e
LW
4121 case KEY_CORE:
4122 if (*s == ':' && s[1] == ':') {
4123 s += 2;
748a9306 4124 d = s;
3280af22 4125 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
6798c92b
GS
4126 if (!(tmp = keyword(PL_tokenbuf, len)))
4127 Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
a0d0e21e
LW
4128 if (tmp < 0)
4129 tmp = -tmp;
4130 goto reserved_word;
4131 }
4132 goto just_a_word;
4133
463ee0b2
LW
4134 case KEY_abs:
4135 UNI(OP_ABS);
4136
79072805
LW
4137 case KEY_alarm:
4138 UNI(OP_ALARM);
4139
4140 case KEY_accept:
a0d0e21e 4141 LOP(OP_ACCEPT,XTERM);
79072805 4142
463ee0b2
LW
4143 case KEY_and:
4144 OPERATOR(ANDOP);
4145
79072805 4146 case KEY_atan2:
a0d0e21e 4147 LOP(OP_ATAN2,XTERM);
85e6fe83 4148
79072805 4149 case KEY_bind:
a0d0e21e 4150 LOP(OP_BIND,XTERM);
79072805
LW
4151
4152 case KEY_binmode:
1c1fc3ea 4153 LOP(OP_BINMODE,XTERM);
79072805
LW
4154
4155 case KEY_bless:
a0d0e21e 4156 LOP(OP_BLESS,XTERM);
79072805
LW
4157
4158 case KEY_chop:
4159 UNI(OP_CHOP);
4160
4161 case KEY_continue:
4162 PREBLOCK(CONTINUE);
4163
4164 case KEY_chdir:
85e6fe83 4165 (void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
79072805
LW
4166 UNI(OP_CHDIR);
4167
4168 case KEY_close:
4169 UNI(OP_CLOSE);
4170
4171 case KEY_closedir:
4172 UNI(OP_CLOSEDIR);
4173
4174 case KEY_cmp:
4175 Eop(OP_SCMP);
4176
4177 case KEY_caller:
4178 UNI(OP_CALLER);
4179
4180 case KEY_crypt:
4181#ifdef FCRYPT
f4c556ac
GS
4182 if (!PL_cryptseen) {
4183 PL_cryptseen = TRUE;
de3bb511 4184 init_des();
f4c556ac 4185 }
a687059c 4186#endif
a0d0e21e 4187 LOP(OP_CRYPT,XTERM);
79072805
LW
4188
4189 case KEY_chmod:
a0d0e21e 4190 LOP(OP_CHMOD,XTERM);
79072805
LW
4191
4192 case KEY_chown:
a0d0e21e 4193 LOP(OP_CHOWN,XTERM);
79072805
LW
4194
4195 case KEY_connect:
a0d0e21e 4196 LOP(OP_CONNECT,XTERM);
79072805 4197
463ee0b2
LW
4198 case KEY_chr:
4199 UNI(OP_CHR);
4200
79072805
LW
4201 case KEY_cos:
4202 UNI(OP_COS);
4203
4204 case KEY_chroot:
4205 UNI(OP_CHROOT);
4206
4207 case KEY_do:
4208 s = skipspace(s);
4209 if (*s == '{')
a0d0e21e 4210 PRETERMBLOCK(DO);
79072805 4211 if (*s != '\'')
89c5585f 4212 s = force_word(s,WORD,TRUE,TRUE,FALSE);
378cc40b 4213 OPERATOR(DO);
79072805
LW
4214
4215 case KEY_die:
3280af22 4216 PL_hints |= HINT_BLOCK_SCOPE;
a0d0e21e 4217 LOP(OP_DIE,XTERM);
79072805
LW
4218
4219 case KEY_defined:
4220 UNI(OP_DEFINED);
4221
4222 case KEY_delete:
a0d0e21e 4223 UNI(OP_DELETE);
79072805
LW
4224
4225 case KEY_dbmopen:
a0d0e21e
LW
4226 gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
4227 LOP(OP_DBMOPEN,XTERM);
79072805
LW
4228
4229 case KEY_dbmclose:
4230 UNI(OP_DBMCLOSE);
4231
4232 case KEY_dump:
a0d0e21e 4233 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW
4234 LOOPX(OP_DUMP);
4235
4236 case KEY_else:
4237 PREBLOCK(ELSE);
4238
4239 case KEY_elsif:
57843af0 4240 yylval.ival = CopLINE(PL_curcop);
79072805
LW
4241 OPERATOR(ELSIF);
4242
4243 case KEY_eq:
4244 Eop(OP_SEQ);
4245
a0d0e21e
LW
4246 case KEY_exists:
4247 UNI(OP_EXISTS);
4e553d73 4248
79072805
LW
4249 case KEY_exit:
4250 UNI(OP_EXIT);
4251
4252 case KEY_eval:
79072805 4253 s = skipspace(s);
3280af22 4254 PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
463ee0b2 4255 UNIBRACK(OP_ENTEREVAL);
79072805
LW
4256
4257 case KEY_eof:
4258 UNI(OP_EOF);
4259
4260 case KEY_exp:
4261 UNI(OP_EXP);
4262
4263 case KEY_each:
4264 UNI(OP_EACH);
4265
4266 case KEY_exec:
4267 set_csh();
a0d0e21e 4268 LOP(OP_EXEC,XREF);
79072805
LW
4269
4270 case KEY_endhostent:
4271 FUN0(OP_EHOSTENT);
4272
4273 case KEY_endnetent:
4274 FUN0(OP_ENETENT);
4275
4276 case KEY_endservent:
4277 FUN0(OP_ESERVENT);
4278
4279 case KEY_endprotoent:
4280 FUN0(OP_EPROTOENT);
4281
4282 case KEY_endpwent:
4283 FUN0(OP_EPWENT);
4284
4285 case KEY_endgrent:
4286 FUN0(OP_EGRENT);
4287
4288 case KEY_for:
4289 case KEY_foreach:
57843af0 4290 yylval.ival = CopLINE(PL_curcop);
55497cff 4291 s = skipspace(s);
7e2040f0 4292 if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) {
55497cff 4293 char *p = s;
3280af22 4294 if ((PL_bufend - p) >= 3 &&
55497cff 4295 strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
4296 p += 2;
77ca0c92
LW
4297 else if ((PL_bufend - p) >= 4 &&
4298 strnEQ(p, "our", 3) && isSPACE(*(p + 3)))
4299 p += 3;
55497cff 4300 p = skipspace(p);
7e2040f0 4301 if (isIDFIRST_lazy_if(p,UTF)) {
77ca0c92
LW
4302 p = scan_ident(p, PL_bufend,
4303 PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
4304 p = skipspace(p);
4305 }
4306 if (*p != '$')
cea2e8a9 4307 Perl_croak(aTHX_ "Missing $ on loop variable");
55497cff 4308 }
79072805
LW
4309 OPERATOR(FOR);
4310
4311 case KEY_formline:
a0d0e21e 4312 LOP(OP_FORMLINE,XTERM);
79072805
LW
4313
4314 case KEY_fork:
4315 FUN0(OP_FORK);
4316
4317 case KEY_fcntl:
a0d0e21e 4318 LOP(OP_FCNTL,XTERM);
79072805
LW
4319
4320 case KEY_fileno:
4321 UNI(OP_FILENO);
4322
4323 case KEY_flock:
a0d0e21e 4324 LOP(OP_FLOCK,XTERM);
79072805
LW
4325
4326 case KEY_gt:
4327 Rop(OP_SGT);
4328
4329 case KEY_ge:
4330 Rop(OP_SGE);
4331
4332 case KEY_grep:
2c38e13d 4333 LOP(OP_GREPSTART, XREF);
79072805
LW
4334
4335 case KEY_goto:
a0d0e21e 4336 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW
4337 LOOPX(OP_GOTO);
4338
4339 case KEY_gmtime:
4340 UNI(OP_GMTIME);
4341
4342 case KEY_getc:
4343 UNI(OP_GETC);
4344
4345 case KEY_getppid:
4346 FUN0(OP_GETPPID);
4347
4348 case KEY_getpgrp:
4349 UNI(OP_GETPGRP);
4350
4351 case KEY_getpriority:
a0d0e21e 4352 LOP(OP_GETPRIORITY,XTERM);
79072805
LW
4353
4354 case KEY_getprotobyname:
4355 UNI(OP_GPBYNAME);
4356
4357 case KEY_getprotobynumber:
a0d0e21e 4358 LOP(OP_GPBYNUMBER,XTERM);
79072805
LW
4359
4360 case KEY_getprotoent:
4361 FUN0(OP_GPROTOENT);
4362
4363 case KEY_getpwent:
4364 FUN0(OP_GPWENT);
4365
4366 case KEY_getpwnam:
ff68c719 4367 UNI(OP_GPWNAM);
79072805
LW
4368
4369 case KEY_getpwuid:
ff68c719 4370 UNI(OP_GPWUID);
79072805
LW
4371
4372 case KEY_getpeername:
4373 UNI(OP_GETPEERNAME);
4374
4375 case KEY_gethostbyname:
4376 UNI(OP_GHBYNAME);
4377
4378 case KEY_gethostbyaddr:
a0d0e21e 4379 LOP(OP_GHBYADDR,XTERM);
79072805
LW
4380
4381 case KEY_gethostent:
4382 FUN0(OP_GHOSTENT);
4383
4384 case KEY_getnetbyname:
4385 UNI(OP_GNBYNAME);
4386
4387 case KEY_getnetbyaddr:
a0d0e21e 4388 LOP(OP_GNBYADDR,XTERM);
79072805
LW
4389
4390 case KEY_getnetent:
4391 FUN0(OP_GNETENT);
4392
4393 case KEY_getservbyname:
a0d0e21e 4394 LOP(OP_GSBYNAME,XTERM);
79072805
LW
4395
4396 case KEY_getservbyport:
a0d0e21e 4397 LOP(OP_GSBYPORT,XTERM);
79072805
LW
4398
4399 case KEY_getservent:
4400 FUN0(OP_GSERVENT);
4401
4402 case KEY_getsockname:
4403 UNI(OP_GETSOCKNAME);
4404
4405 case KEY_getsockopt:
a0d0e21e 4406 LOP(OP_GSOCKOPT,XTERM);
79072805
LW
4407
4408 case KEY_getgrent:
4409 FUN0(OP_GGRENT);
4410
4411 case KEY_getgrnam:
ff68c719 4412 UNI(OP_GGRNAM);
79072805
LW
4413
4414 case KEY_getgrgid:
ff68c719 4415 UNI(OP_GGRGID);
79072805
LW
4416
4417 case KEY_getlogin:
4418 FUN0(OP_GETLOGIN);
4419
93a17b20 4420 case KEY_glob:
a0d0e21e
LW
4421 set_csh();
4422 LOP(OP_GLOB,XTERM);
93a17b20 4423
79072805
LW
4424 case KEY_hex:
4425 UNI(OP_HEX);
4426
4427 case KEY_if:
57843af0 4428 yylval.ival = CopLINE(PL_curcop);
79072805
LW
4429 OPERATOR(IF);
4430
4431 case KEY_index:
a0d0e21e 4432 LOP(OP_INDEX,XTERM);
79072805
LW
4433
4434 case KEY_int:
4435 UNI(OP_INT);
4436
4437 case KEY_ioctl:
a0d0e21e 4438 LOP(OP_IOCTL,XTERM);
79072805
LW
4439
4440 case KEY_join:
a0d0e21e 4441 LOP(OP_JOIN,XTERM);
79072805
LW
4442
4443 case KEY_keys:
4444 UNI(OP_KEYS);
4445
4446 case KEY_kill:
a0d0e21e 4447 LOP(OP_KILL,XTERM);
79072805
LW
4448
4449 case KEY_last:
a0d0e21e 4450 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805 4451 LOOPX(OP_LAST);
4e553d73 4452
79072805
LW
4453 case KEY_lc:
4454 UNI(OP_LC);
4455
4456 case KEY_lcfirst:
4457 UNI(OP_LCFIRST);
4458
4459 case KEY_local:
09bef843 4460 yylval.ival = 0;
79072805
LW
4461 OPERATOR(LOCAL);
4462
4463 case KEY_length:
4464 UNI(OP_LENGTH);
4465
4466 case KEY_lt:
4467 Rop(OP_SLT);
4468
4469 case KEY_le:
4470 Rop(OP_SLE);
4471
4472 case KEY_localtime:
4473 UNI(OP_LOCALTIME);
4474
4475 case KEY_log:
4476 UNI(OP_LOG);
4477
4478 case KEY_link:
a0d0e21e 4479 LOP(OP_LINK,XTERM);
79072805
LW
4480
4481 case KEY_listen:
a0d0e21e 4482 LOP(OP_LISTEN,XTERM);
79072805 4483
c0329465
MB
4484 case KEY_lock:
4485 UNI(OP_LOCK);
4486
79072805
LW
4487 case KEY_lstat:
4488 UNI(OP_LSTAT);
4489
4490 case KEY_m:
8782bef2 4491 s = scan_pat(s,OP_MATCH);
79072805
LW
4492 TERM(sublex_start());
4493
a0d0e21e 4494 case KEY_map:
2c38e13d 4495 LOP(OP_MAPSTART, XREF);
4e4e412b 4496
79072805 4497 case KEY_mkdir:
a0d0e21e 4498 LOP(OP_MKDIR,XTERM);
79072805
LW
4499
4500 case KEY_msgctl:
a0d0e21e 4501 LOP(OP_MSGCTL,XTERM);
79072805
LW
4502
4503 case KEY_msgget:
a0d0e21e 4504 LOP(OP_MSGGET,XTERM);
79072805
LW
4505
4506 case KEY_msgrcv:
a0d0e21e 4507 LOP(OP_MSGRCV,XTERM);
79072805
LW
4508
4509 case KEY_msgsnd:
a0d0e21e 4510 LOP(OP_MSGSND,XTERM);
79072805 4511
77ca0c92 4512 case KEY_our:
93a17b20 4513 case KEY_my:
77ca0c92 4514 PL_in_my = tmp;
c750a3ec 4515 s = skipspace(s);
7e2040f0 4516 if (isIDFIRST_lazy_if(s,UTF)) {
3280af22 4517 s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
09bef843
SB
4518 if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3))
4519 goto really_sub;
def3634b 4520 PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len);
3280af22 4521 if (!PL_in_my_stash) {
c750a3ec 4522 char tmpbuf[1024];
3280af22
NIS
4523 PL_bufptr = s;
4524 sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
c750a3ec
MB
4525 yyerror(tmpbuf);
4526 }
4527 }
09bef843 4528 yylval.ival = 1;
55497cff 4529 OPERATOR(MY);
93a17b20 4530
79072805 4531 case KEY_next:
a0d0e21e 4532 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW
4533 LOOPX(OP_NEXT);
4534
4535 case KEY_ne:
4536 Eop(OP_SNE);
4537
a0d0e21e 4538 case KEY_no:
3280af22 4539 if (PL_expect != XSTATE)
a0d0e21e
LW
4540 yyerror("\"no\" not allowed in expression");
4541 s = force_word(s,WORD,FALSE,TRUE,FALSE);
e759cc13 4542 s = force_version(s, FALSE);
a0d0e21e
LW
4543 yylval.ival = 0;
4544 OPERATOR(USE);
4545
4546 case KEY_not:
2d2e263d
LW
4547 if (*s == '(' || (s = skipspace(s), *s == '('))
4548 FUN1(OP_NOT);
4549 else
4550 OPERATOR(NOTOP);
a0d0e21e 4551
79072805 4552 case KEY_open:
93a17b20 4553 s = skipspace(s);
7e2040f0 4554 if (isIDFIRST_lazy_if(s,UTF)) {
93a17b20 4555 char *t;
7e2040f0 4556 for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
93a17b20 4557 t = skipspace(d);
e476b1b5
GS
4558 if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
4559 Perl_warner(aTHX_ WARN_PRECEDENCE,
0453d815
PM
4560 "Precedence problem: open %.*s should be open(%.*s)",
4561 d-s,s, d-s,s);
93a17b20 4562 }
a0d0e21e 4563 LOP(OP_OPEN,XTERM);
79072805 4564
463ee0b2 4565 case KEY_or:
a0d0e21e 4566 yylval.ival = OP_OR;
463ee0b2
LW
4567 OPERATOR(OROP);
4568
79072805
LW
4569 case KEY_ord:
4570 UNI(OP_ORD);
4571
4572 case KEY_oct:
4573 UNI(OP_OCT);
4574
4575 case KEY_opendir:
a0d0e21e 4576 LOP(OP_OPEN_DIR,XTERM);
79072805
LW
4577
4578 case KEY_print:
3280af22 4579 checkcomma(s,PL_tokenbuf,"filehandle");
a0d0e21e 4580 LOP(OP_PRINT,XREF);
79072805
LW
4581
4582 case KEY_printf:
3280af22 4583 checkcomma(s,PL_tokenbuf,"filehandle");
a0d0e21e 4584 LOP(OP_PRTF,XREF);
79072805 4585
c07a80fd 4586 case KEY_prototype:
4587 UNI(OP_PROTOTYPE);
4588
79072805 4589 case KEY_push:
a0d0e21e 4590 LOP(OP_PUSH,XTERM);
79072805
LW
4591
4592 case KEY_pop:
4593 UNI(OP_POP);
4594
a0d0e21e
LW
4595 case KEY_pos:
4596 UNI(OP_POS);
4e553d73 4597
79072805 4598 case KEY_pack:
a0d0e21e 4599 LOP(OP_PACK,XTERM);
79072805
LW
4600
4601 case KEY_package:
a0d0e21e 4602 s = force_word(s,WORD,FALSE,TRUE,FALSE);
79072805
LW
4603 OPERATOR(PACKAGE);
4604
4605 case KEY_pipe:
a0d0e21e 4606 LOP(OP_PIPE_OP,XTERM);
79072805
LW
4607
4608 case KEY_q:
09bef843 4609 s = scan_str(s,FALSE,FALSE);
79072805 4610 if (!s)
85e6fe83 4611 missingterm((char*)0);
79072805
LW
4612 yylval.ival = OP_CONST;
4613 TERM(sublex_start());
4614
a0d0e21e
LW
4615 case KEY_quotemeta:
4616 UNI(OP_QUOTEMETA);
4617
8990e307 4618 case KEY_qw:
09bef843 4619 s = scan_str(s,FALSE,FALSE);
8990e307 4620 if (!s)
85e6fe83 4621 missingterm((char*)0);
8127e0e3
GS
4622 force_next(')');
4623 if (SvCUR(PL_lex_stuff)) {
4624 OP *words = Nullop;
4625 int warned = 0;
3280af22 4626 d = SvPV_force(PL_lex_stuff, len);
8127e0e3 4627 while (len) {
7948272d 4628 SV *sv;
8127e0e3
GS
4629 for (; isSPACE(*d) && len; --len, ++d) ;
4630 if (len) {
4631 char *b = d;
e476b1b5 4632 if (!warned && ckWARN(WARN_QW)) {
8127e0e3
GS
4633 for (; !isSPACE(*d) && len; --len, ++d) {
4634 if (*d == ',') {
e476b1b5 4635 Perl_warner(aTHX_ WARN_QW,
8127e0e3
GS
4636 "Possible attempt to separate words with commas");
4637 ++warned;
4638 }
4639 else if (*d == '#') {
e476b1b5 4640 Perl_warner(aTHX_ WARN_QW,
8127e0e3
GS
4641 "Possible attempt to put comments in qw() list");
4642 ++warned;
4643 }
4644 }
4645 }
4646 else {
4647 for (; !isSPACE(*d) && len; --len, ++d) ;
4648 }
7948272d
NIS
4649 sv = newSVpvn(b, d-b);
4650 if (DO_UTF8(PL_lex_stuff))
4651 SvUTF8_on(sv);
8127e0e3 4652 words = append_elem(OP_LIST, words,
7948272d 4653 newSVOP(OP_CONST, 0, tokeq(sv)));
55497cff 4654 }
4655 }
8127e0e3
GS
4656 if (words) {
4657 PL_nextval[PL_nexttoke].opval = words;
4658 force_next(THING);
4659 }
55497cff 4660 }
37fd879b 4661 if (PL_lex_stuff) {
8127e0e3 4662 SvREFCNT_dec(PL_lex_stuff);
37fd879b
HS
4663 PL_lex_stuff = Nullsv;
4664 }
3280af22 4665 PL_expect = XTERM;
8127e0e3 4666 TOKEN('(');
8990e307 4667
79072805 4668 case KEY_qq:
09bef843 4669 s = scan_str(s,FALSE,FALSE);
79072805 4670 if (!s)
85e6fe83 4671 missingterm((char*)0);
a0d0e21e 4672 yylval.ival = OP_STRINGIFY;
3280af22
NIS
4673 if (SvIVX(PL_lex_stuff) == '\'')
4674 SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
79072805
LW
4675 TERM(sublex_start());
4676
8782bef2
GB
4677 case KEY_qr:
4678 s = scan_pat(s,OP_QR);
4679 TERM(sublex_start());
4680
79072805 4681 case KEY_qx:
09bef843 4682 s = scan_str(s,FALSE,FALSE);
79072805 4683 if (!s)
85e6fe83 4684 missingterm((char*)0);
79072805
LW
4685 yylval.ival = OP_BACKTICK;
4686 set_csh();
4687 TERM(sublex_start());
4688
4689 case KEY_return:
4690 OLDLOP(OP_RETURN);
4691
4692 case KEY_require:
a7cb1f99 4693 s = skipspace(s);
e759cc13
RGS
4694 if (isDIGIT(*s)) {
4695 s = force_version(s, FALSE);
a7cb1f99 4696 }
e759cc13
RGS
4697 else if (*s != 'v' || !isDIGIT(s[1])
4698 || (s = force_version(s, TRUE), *s == 'v'))
4699 {
a7cb1f99
GS
4700 *PL_tokenbuf = '\0';
4701 s = force_word(s,WORD,TRUE,TRUE,FALSE);
7e2040f0 4702 if (isIDFIRST_lazy_if(PL_tokenbuf,UTF))
a7cb1f99
GS
4703 gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
4704 else if (*s == '<')
4705 yyerror("<> should be quotes");
4706 }
463ee0b2 4707 UNI(OP_REQUIRE);
79072805
LW
4708
4709 case KEY_reset:
4710 UNI(OP_RESET);
4711
4712 case KEY_redo:
a0d0e21e 4713 s = force_word(s,WORD,TRUE,FALSE,FALSE);
79072805
LW
4714 LOOPX(OP_REDO);
4715
4716 case KEY_rename:
a0d0e21e 4717 LOP(OP_RENAME,XTERM);
79072805
LW
4718
4719 case KEY_rand:
4720 UNI(OP_RAND);
4721
4722 case KEY_rmdir:
4723 UNI(OP_RMDIR);
4724
4725 case KEY_rindex:
a0d0e21e 4726 LOP(OP_RINDEX,XTERM);
79072805
LW
4727
4728 case KEY_read:
a0d0e21e 4729 LOP(OP_READ,XTERM);
79072805
LW
4730
4731 case KEY_readdir:
4732 UNI(OP_READDIR);
4733
93a17b20
LW
4734 case KEY_readline:
4735 set_csh();
4736 UNI(OP_READLINE);
4737
4738 case KEY_readpipe:
4739 set_csh();
4740 UNI(OP_BACKTICK);
4741
79072805
LW
4742 case KEY_rewinddir:
4743 UNI(OP_REWINDDIR);
4744
4745 case KEY_recv:
a0d0e21e 4746 LOP(OP_RECV,XTERM);
79072805
LW
4747
4748 case KEY_reverse:
a0d0e21e 4749 LOP(OP_REVERSE,XTERM);
79072805
LW
4750
4751 case KEY_readlink:
4752 UNI(OP_READLINK);
4753
4754 case KEY_ref:
4755 UNI(OP_REF);
4756
4757 case KEY_s:
4758 s = scan_subst(s);
4759 if (yylval.opval)
4760 TERM(sublex_start());
4761 else
4762 TOKEN(1); /* force error */
4763
a0d0e21e
LW
4764 case KEY_chomp:
4765 UNI(OP_CHOMP);
4e553d73 4766
79072805
LW
4767 case KEY_scalar:
4768 UNI(OP_SCALAR);
4769
4770 case KEY_select:
a0d0e21e 4771 LOP(OP_SELECT,XTERM);
79072805
LW
4772
4773 case KEY_seek:
a0d0e21e 4774 LOP(OP_SEEK,XTERM);
79072805
LW
4775
4776 case KEY_semctl:
a0d0e21e 4777 LOP(OP_SEMCTL,XTERM);
79072805
LW
4778
4779 case KEY_semget:
a0d0e21e 4780 LOP(OP_SEMGET,XTERM);
79072805
LW
4781
4782 case KEY_semop:
a0d0e21e 4783 LOP(OP_SEMOP,XTERM);
79072805
LW
4784
4785 case KEY_send:
a0d0e21e 4786 LOP(OP_SEND,XTERM);
79072805
LW
4787
4788 case KEY_setpgrp:
a0d0e21e 4789 LOP(OP_SETPGRP,XTERM);
79072805
LW
4790
4791 case KEY_setpriority:
a0d0e21e 4792 LOP(OP_SETPRIORITY,XTERM);
79072805
LW
4793
4794 case KEY_sethostent:
ff68c719 4795 UNI(OP_SHOSTENT);
79072805
LW
4796
4797 case KEY_setnetent:
ff68c719 4798 UNI(OP_SNETENT);
79072805
LW
4799
4800 case KEY_setservent:
ff68c719 4801 UNI(OP_SSERVENT);
79072805
LW
4802
4803 case KEY_setprotoent:
ff68c719 4804 UNI(OP_SPROTOENT);
79072805
LW
4805
4806 case KEY_setpwent:
4807 FUN0(OP_SPWENT);
4808
4809 case KEY_setgrent:
4810 FUN0(OP_SGRENT);
4811
4812 case KEY_seekdir:
a0d0e21e 4813 LOP(OP_SEEKDIR,XTERM);
79072805
LW
4814
4815 case KEY_setsockopt:
a0d0e21e 4816 LOP(OP_SSOCKOPT,XTERM);
79072805
LW
4817
4818 case KEY_shift:
4819 UNI(OP_SHIFT);
4820
4821 case KEY_shmctl:
a0d0e21e 4822 LOP(OP_SHMCTL,XTERM);
79072805
LW
4823
4824 case KEY_shmget:
a0d0e21e 4825 LOP(OP_SHMGET,XTERM);
79072805
LW
4826
4827 case KEY_shmread:
a0d0e21e 4828 LOP(OP_SHMREAD,XTERM);
79072805
LW
4829
4830 case KEY_shmwrite:
a0d0e21e 4831 LOP(OP_SHMWRITE,XTERM);
79072805
LW
4832
4833 case KEY_shutdown:
a0d0e21e 4834 LOP(OP_SHUTDOWN,XTERM);
79072805
LW
4835
4836 case KEY_sin:
4837 UNI(OP_SIN);
4838
4839 case KEY_sleep:
4840 UNI(OP_SLEEP);
4841
4842 case KEY_socket:
a0d0e21e 4843 LOP(OP_SOCKET,XTERM);
79072805
LW
4844
4845 case KEY_socketpair:
a0d0e21e 4846 LOP(OP_SOCKPAIR,XTERM);
79072805
LW
4847
4848 case KEY_sort:
3280af22 4849 checkcomma(s,PL_tokenbuf,"subroutine name");
79072805
LW
4850 s = skipspace(s);
4851 if (*s == ';' || *s == ')') /* probably a close */
cea2e8a9 4852 Perl_croak(aTHX_ "sort is now a reserved word");
3280af22 4853 PL_expect = XTERM;
15f0808c 4854 s = force_word(s,WORD,TRUE,TRUE,FALSE);
a0d0e21e 4855 LOP(OP_SORT,XREF);
79072805
LW
4856
4857 case KEY_split:
a0d0e21e 4858 LOP(OP_SPLIT,XTERM);
79072805
LW
4859
4860 case KEY_sprintf:
a0d0e21e 4861 LOP(OP_SPRINTF,XTERM);
79072805
LW
4862
4863 case KEY_splice:
a0d0e21e 4864 LOP(OP_SPLICE,XTERM);
79072805
LW
4865
4866 case KEY_sqrt:
4867 UNI(OP_SQRT);
4868
4869 case KEY_srand:
4870 UNI(OP_SRAND);
4871
4872 case KEY_stat:
4873 UNI(OP_STAT);
4874
4875 case KEY_study:
79072805
LW
4876 UNI(OP_STUDY);
4877
4878 case KEY_substr:
a0d0e21e 4879 LOP(OP_SUBSTR,XTERM);
79072805
LW
4880
4881 case KEY_format:
4882 case KEY_sub:
93a17b20 4883 really_sub:
09bef843 4884 {
3280af22 4885 char tmpbuf[sizeof PL_tokenbuf];
9c5ffd7c 4886 SSize_t tboffset = 0;
09bef843
SB
4887 expectation attrful;
4888 bool have_name, have_proto;
4889 int key = tmp;
4890
4891 s = skipspace(s);
4892
7e2040f0 4893 if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' ||
09bef843
SB
4894 (*s == ':' && s[1] == ':'))
4895 {
4896 PL_expect = XBLOCK;
4897 attrful = XATTRBLOCK;
b1b65b59
JH
4898 /* remember buffer pos'n for later force_word */
4899 tboffset = s - PL_oldbufptr;
09bef843
SB
4900 d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
4901 if (strchr(tmpbuf, ':'))
4902 sv_setpv(PL_subname, tmpbuf);
4903 else {
4904 sv_setsv(PL_subname,PL_curstname);
4905 sv_catpvn(PL_subname,"::",2);
4906 sv_catpvn(PL_subname,tmpbuf,len);
4907 }
4908 s = skipspace(d);
4909 have_name = TRUE;
4910 }
463ee0b2 4911 else {
09bef843
SB
4912 if (key == KEY_my)
4913 Perl_croak(aTHX_ "Missing name in \"my sub\"");
4914 PL_expect = XTERMBLOCK;
4915 attrful = XATTRTERM;
4916 sv_setpv(PL_subname,"?");
4917 have_name = FALSE;
463ee0b2 4918 }
4633a7c4 4919
09bef843
SB
4920 if (key == KEY_format) {
4921 if (*s == '=')
4922 PL_lex_formbrack = PL_lex_brackets + 1;
4923 if (have_name)
b1b65b59
JH
4924 (void) force_word(PL_oldbufptr + tboffset, WORD,
4925 FALSE, TRUE, TRUE);
09bef843
SB
4926 OPERATOR(FORMAT);
4927 }
79072805 4928
09bef843
SB
4929 /* Look for a prototype */
4930 if (*s == '(') {
4931 char *p;
4932
4933 s = scan_str(s,FALSE,FALSE);
37fd879b 4934 if (!s)
09bef843 4935 Perl_croak(aTHX_ "Prototype not terminated");
09bef843
SB
4936 /* strip spaces */
4937 d = SvPVX(PL_lex_stuff);
4938 tmp = 0;
4939 for (p = d; *p; ++p) {
4940 if (!isSPACE(*p))
4941 d[tmp++] = *p;
4942 }
4943 d[tmp] = '\0';
4944 SvCUR(PL_lex_stuff) = tmp;
4945 have_proto = TRUE;
68dc0745 4946
09bef843 4947 s = skipspace(s);
4633a7c4 4948 }
09bef843
SB
4949 else
4950 have_proto = FALSE;
4951
4952 if (*s == ':' && s[1] != ':')
4953 PL_expect = attrful;
4954
4955 if (have_proto) {
b1b65b59
JH
4956 PL_nextval[PL_nexttoke].opval =
4957 (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
09bef843
SB
4958 PL_lex_stuff = Nullsv;
4959 force_next(THING);
68dc0745 4960 }
09bef843
SB
4961 if (!have_name) {
4962 sv_setpv(PL_subname,"__ANON__");
4963 TOKEN(ANONSUB);
4633a7c4 4964 }
b1b65b59
JH
4965 (void) force_word(PL_oldbufptr + tboffset, WORD,
4966 FALSE, TRUE, TRUE);
09bef843
SB
4967 if (key == KEY_my)
4968 TOKEN(MYSUB);
4969 TOKEN(SUB);
4633a7c4 4970 }
79072805
LW
4971
4972 case KEY_system:
4973 set_csh();
a0d0e21e 4974 LOP(OP_SYSTEM,XREF);
79072805
LW
4975
4976 case KEY_symlink:
a0d0e21e 4977 LOP(OP_SYMLINK,XTERM);
79072805
LW
4978
4979 case KEY_syscall:
a0d0e21e 4980 LOP(OP_SYSCALL,XTERM);
79072805 4981
c07a80fd 4982 case KEY_sysopen:
4983 LOP(OP_SYSOPEN,XTERM);
4984
137443ea 4985 case KEY_sysseek:
4986 LOP(OP_SYSSEEK,XTERM);
4987
79072805 4988 case KEY_sysread:
a0d0e21e 4989 LOP(OP_SYSREAD,XTERM);
79072805
LW
4990
4991 case KEY_syswrite:
a0d0e21e 4992 LOP(OP_SYSWRITE,XTERM);
79072805
LW
4993
4994 case KEY_tr:
4995 s = scan_trans(s);
4996 TERM(sublex_start());
4997
4998 case KEY_tell:
4999 UNI(OP_TELL);
5000
5001 case KEY_telldir:
5002 UNI(OP_TELLDIR);
5003
463ee0b2 5004 case KEY_tie:
a0d0e21e 5005 LOP(OP_TIE,XTERM);
463ee0b2 5006
c07a80fd 5007 case KEY_tied:
5008 UNI(OP_TIED);
5009
79072805
LW
5010 case KEY_time:
5011 FUN0(OP_TIME);
5012
5013 case KEY_times:
5014 FUN0(OP_TMS);
5015
5016 case KEY_truncate:
a0d0e21e 5017 LOP(OP_TRUNCATE,XTERM);
79072805
LW
5018
5019 case KEY_uc:
5020 UNI(OP_UC);
5021
5022 case KEY_ucfirst:
5023 UNI(OP_UCFIRST);
5024
463ee0b2
LW
5025 case KEY_untie:
5026 UNI(OP_UNTIE);
5027
79072805 5028 case KEY_until:
57843af0 5029 yylval.ival = CopLINE(PL_curcop);
79072805
LW
5030 OPERATOR(UNTIL);
5031
5032 case KEY_unless:
57843af0 5033 yylval.ival = CopLINE(PL_curcop);
79072805
LW
5034 OPERATOR(UNLESS);
5035
5036 case KEY_unlink:
a0d0e21e 5037 LOP(OP_UNLINK,XTERM);
79072805
LW
5038
5039 case KEY_undef:
5040 UNI(OP_UNDEF);
5041
5042 case KEY_unpack:
a0d0e21e 5043 LOP(OP_UNPACK,XTERM);
79072805
LW
5044
5045 case KEY_utime:
a0d0e21e 5046 LOP(OP_UTIME,XTERM);
79072805
LW
5047
5048 case KEY_umask:
5049 UNI(OP_UMASK);
5050
5051 case KEY_unshift:
a0d0e21e
LW
5052 LOP(OP_UNSHIFT,XTERM);
5053
5054 case KEY_use:
3280af22 5055 if (PL_expect != XSTATE)
a0d0e21e 5056 yyerror("\"use\" not allowed in expression");
89bfa8cd 5057 s = skipspace(s);
a7cb1f99 5058 if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) {
e759cc13 5059 s = force_version(s, TRUE);
a7cb1f99 5060 if (*s == ';' || (s = skipspace(s), *s == ';')) {
3280af22 5061 PL_nextval[PL_nexttoke].opval = Nullop;
89bfa8cd 5062 force_next(WORD);
5063 }
e759cc13
RGS
5064 else if (*s == 'v') {
5065 s = force_word(s,WORD,FALSE,TRUE,FALSE);
5066 s = force_version(s, FALSE);
5067 }
89bfa8cd 5068 }
5069 else {
5070 s = force_word(s,WORD,FALSE,TRUE,FALSE);
e759cc13 5071 s = force_version(s, FALSE);
89bfa8cd 5072 }
a0d0e21e
LW
5073 yylval.ival = 1;
5074 OPERATOR(USE);
79072805
LW
5075
5076 case KEY_values:
5077 UNI(OP_VALUES);
5078
5079 case KEY_vec:
a0d0e21e 5080 LOP(OP_VEC,XTERM);
79072805
LW
5081
5082 case KEY_while:
57843af0 5083 yylval.ival = CopLINE(PL_curcop);
79072805
LW
5084 OPERATOR(WHILE);
5085
5086 case KEY_warn:
3280af22 5087 PL_hints |= HINT_BLOCK_SCOPE;
a0d0e21e 5088 LOP(OP_WARN,XTERM);
79072805
LW
5089
5090 case KEY_wait:
5091 FUN0(OP_WAIT);
5092
5093 case KEY_waitpid:
a0d0e21e 5094 LOP(OP_WAITPID,XTERM);
79072805
LW
5095
5096 case KEY_wantarray:
5097 FUN0(OP_WANTARRAY);
5098
5099 case KEY_write:
9d116dd7
JH
5100#ifdef EBCDIC
5101 {
df3728a2
JH
5102 char ctl_l[2];
5103 ctl_l[0] = toCTRL('L');
5104 ctl_l[1] = '\0';
9d116dd7
JH
5105 gv_fetchpv(ctl_l,TRUE, SVt_PV);
5106 }
5107#else
5108 gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
5109#endif
79072805
LW
5110 UNI(OP_ENTERWRITE);
5111
5112 case KEY_x:
3280af22 5113 if (PL_expect == XOPERATOR)
79072805
LW
5114 Mop(OP_REPEAT);
5115 check_uni();
5116 goto just_a_word;
5117
a0d0e21e
LW
5118 case KEY_xor:
5119 yylval.ival = OP_XOR;
5120 OPERATOR(OROP);
5121
79072805
LW
5122 case KEY_y:
5123 s = scan_trans(s);
5124 TERM(sublex_start());
5125 }
49dc05e3 5126 }}
79072805 5127}
bf4acbe4
GS
5128#ifdef __SC__
5129#pragma segment Main
5130#endif
79072805 5131
e930465f
JH
5132static int
5133S_pending_ident(pTHX)
8eceec63
SC
5134{
5135 register char *d;
5136 register I32 tmp;
5137 /* pit holds the identifier we read and pending_ident is reset */
5138 char pit = PL_pending_ident;
5139 PL_pending_ident = 0;
5140
5141 DEBUG_T({ PerlIO_printf(Perl_debug_log,
5142 "### Tokener saw identifier '%s'\n", PL_tokenbuf); });
5143
5144 /* if we're in a my(), we can't allow dynamics here.
5145 $foo'bar has already been turned into $foo::bar, so
5146 just check for colons.
5147
5148 if it's a legal name, the OP is a PADANY.
5149 */
5150 if (PL_in_my) {
5151 if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */
5152 if (strchr(PL_tokenbuf,':'))
5153 yyerror(Perl_form(aTHX_ "No package name allowed for "
5154 "variable %s in \"our\"",
5155 PL_tokenbuf));
5156 tmp = pad_allocmy(PL_tokenbuf);
5157 }
5158 else {
5159 if (strchr(PL_tokenbuf,':'))
5160 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
5161
5162 yylval.opval = newOP(OP_PADANY, 0);
5163 yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
5164 return PRIVATEREF;
5165 }
5166 }
5167
5168 /*
5169 build the ops for accesses to a my() variable.
5170
5171 Deny my($a) or my($b) in a sort block, *if* $a or $b is
5172 then used in a comparison. This catches most, but not
5173 all cases. For instance, it catches
5174 sort { my($a); $a <=> $b }
5175 but not
5176 sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
5177 (although why you'd do that is anyone's guess).
5178 */
5179
5180 if (!strchr(PL_tokenbuf,':')) {
4d1ff10f 5181#ifdef USE_5005THREADS
8eceec63
SC
5182 /* Check for single character per-thread SVs */
5183 if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
5184 && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
5185 && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
5186 {
5187 yylval.opval = newOP(OP_THREADSV, 0);
5188 yylval.opval->op_targ = tmp;
5189 return PRIVATEREF;
5190 }
4d1ff10f 5191#endif /* USE_5005THREADS */
8eceec63
SC
5192 if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
5193 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
5194 /* might be an "our" variable" */
5195 if (SvFLAGS(namesv) & SVpad_OUR) {
5196 /* build ops for a bareword */
5197 SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
5198 sv_catpvn(sym, "::", 2);
5199 sv_catpv(sym, PL_tokenbuf+1);
5200 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
5201 yylval.opval->op_private = OPpCONST_ENTERED;
5202 gv_fetchpv(SvPVX(sym),
5203 (PL_in_eval
5204 ? (GV_ADDMULTI | GV_ADDINEVAL)
5205 : TRUE
5206 ),
5207 ((PL_tokenbuf[0] == '$') ? SVt_PV
5208 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
5209 : SVt_PVHV));
5210 return WORD;
5211 }
5212
5213 /* if it's a sort block and they're naming $a or $b */
5214 if (PL_last_lop_op == OP_SORT &&
5215 PL_tokenbuf[0] == '$' &&
5216 (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
5217 && !PL_tokenbuf[2])
5218 {
5219 for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
5220 d < PL_bufend && *d != '\n';
5221 d++)
5222 {
5223 if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
5224 Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison",
5225 PL_tokenbuf);
5226 }
5227 }
5228 }
5229
5230 yylval.opval = newOP(OP_PADANY, 0);
5231 yylval.opval->op_targ = tmp;
5232 return PRIVATEREF;
5233 }
5234 }
5235
5236 /*
5237 Whine if they've said @foo in a doublequoted string,
5238 and @foo isn't a variable we can find in the symbol
5239 table.
5240 */
5241 if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
5242 GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
5243 if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
5244 && ckWARN(WARN_AMBIGUOUS))
5245 {
5246 /* Downgraded from fatal to warning 20000522 mjd */
5247 Perl_warner(aTHX_ WARN_AMBIGUOUS,
5248 "Possible unintended interpolation of %s in string",
5249 PL_tokenbuf);
5250 }
5251 }
5252
5253 /* build ops for a bareword */
5254 yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
5255 yylval.opval->op_private = OPpCONST_ENTERED;
5256 gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
5257 ((PL_tokenbuf[0] == '$') ? SVt_PV
5258 : (PL_tokenbuf[0] == '@') ? SVt_PVAV
5259 : SVt_PVHV));
5260 return WORD;
5261}
5262
79072805 5263I32
864dbfa3 5264Perl_keyword(pTHX_ register char *d, I32 len)
79072805
LW
5265{
5266 switch (*d) {
5267 case '_':
5268 if (d[1] == '_') {
a0d0e21e 5269 if (strEQ(d,"__FILE__")) return -KEY___FILE__;
68dc0745 5270 if (strEQ(d,"__LINE__")) return -KEY___LINE__;
5271 if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
e50aee73 5272 if (strEQ(d,"__DATA__")) return KEY___DATA__;
79072805
LW
5273 if (strEQ(d,"__END__")) return KEY___END__;
5274 }
5275 break;
8990e307
LW
5276 case 'A':
5277 if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
5278 break;
79072805 5279 case 'a':
463ee0b2
LW
5280 switch (len) {
5281 case 3:
a0d0e21e
LW
5282 if (strEQ(d,"and")) return -KEY_and;
5283 if (strEQ(d,"abs")) return -KEY_abs;
85e6fe83 5284 break;
463ee0b2 5285 case 5:
a0d0e21e
LW
5286 if (strEQ(d,"alarm")) return -KEY_alarm;
5287 if (strEQ(d,"atan2")) return -KEY_atan2;
463ee0b2
LW
5288 break;
5289 case 6:
a0d0e21e 5290 if (strEQ(d,"accept")) return -KEY_accept;
463ee0b2
LW
5291 break;
5292 }
79072805
LW
5293 break;
5294 case 'B':
5295 if (strEQ(d,"BEGIN")) return KEY_BEGIN;
93a17b20 5296 break;
79072805 5297 case 'b':
a0d0e21e
LW
5298 if (strEQ(d,"bless")) return -KEY_bless;
5299 if (strEQ(d,"bind")) return -KEY_bind;
5300 if (strEQ(d,"binmode")) return -KEY_binmode;
5301 break;
5302 case 'C':
5303 if (strEQ(d,"CORE")) return -KEY_CORE;
7d30b5c4 5304 if (strEQ(d,"CHECK")) return KEY_CHECK;
79072805
LW
5305 break;
5306 case 'c':
5307 switch (len) {
5308 case 3:
a0d0e21e
LW
5309 if (strEQ(d,"cmp")) return -KEY_cmp;
5310 if (strEQ(d,"chr")) return -KEY_chr;
5311 if (strEQ(d,"cos")) return -KEY_cos;
79072805
LW
5312 break;
5313 case 4:
79e5458b 5314 if (strEQ(d,"chop")) return -KEY_chop;
79072805
LW
5315 break;
5316 case 5:
a0d0e21e
LW
5317 if (strEQ(d,"close")) return -KEY_close;
5318 if (strEQ(d,"chdir")) return -KEY_chdir;
79e5458b 5319 if (strEQ(d,"chomp")) return -KEY_chomp;
a0d0e21e
LW
5320 if (strEQ(d,"chmod")) return -KEY_chmod;
5321 if (strEQ(d,"chown")) return -KEY_chown;
5322 if (strEQ(d,"crypt")) return -KEY_crypt;
79072805
LW
5323 break;
5324 case 6:
a0d0e21e
LW
5325 if (strEQ(d,"chroot")) return -KEY_chroot;
5326 if (strEQ(d,"caller")) return -KEY_caller;
79072805
LW
5327 break;
5328 case 7:
a0d0e21e 5329 if (strEQ(d,"connect")) return -KEY_connect;
79072805
LW
5330 break;
5331 case 8:
a0d0e21e
LW
5332 if (strEQ(d,"closedir")) return -KEY_closedir;
5333 if (strEQ(d,"continue")) return -KEY_continue;
79072805
LW
5334 break;
5335 }
5336 break;
ed6116ce
LW
5337 case 'D':
5338 if (strEQ(d,"DESTROY")) return KEY_DESTROY;
5339 break;
79072805
LW
5340 case 'd':
5341 switch (len) {
5342 case 2:
5343 if (strEQ(d,"do")) return KEY_do;
5344 break;
5345 case 3:
a0d0e21e 5346 if (strEQ(d,"die")) return -KEY_die;
79072805
LW
5347 break;
5348 case 4:
a0d0e21e 5349 if (strEQ(d,"dump")) return -KEY_dump;
79072805
LW
5350 break;
5351 case 6:
5352 if (strEQ(d,"delete")) return KEY_delete;
5353 break;
5354 case 7:
5355 if (strEQ(d,"defined")) return KEY_defined;
a0d0e21e 5356 if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
79072805
LW
5357 break;
5358 case 8:
a0d0e21e 5359 if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
79072805
LW
5360 break;
5361 }
5362 break;
5363 case 'E':
79072805
LW
5364 if (strEQ(d,"END")) return KEY_END;
5365 break;
5366 case 'e':
5367 switch (len) {
5368 case 2:
a0d0e21e 5369 if (strEQ(d,"eq")) return -KEY_eq;
79072805
LW
5370 break;
5371 case 3:
a0d0e21e
LW
5372 if (strEQ(d,"eof")) return -KEY_eof;
5373 if (strEQ(d,"exp")) return -KEY_exp;
79072805
LW
5374 break;
5375 case 4:
5376 if (strEQ(d,"else")) return KEY_else;
a0d0e21e 5377 if (strEQ(d,"exit")) return -KEY_exit;
79072805 5378 if (strEQ(d,"eval")) return KEY_eval;
a0d0e21e 5379 if (strEQ(d,"exec")) return -KEY_exec;
3a6a8333 5380 if (strEQ(d,"each")) return -KEY_each;
79072805
LW
5381 break;
5382 case 5:
5383 if (strEQ(d,"elsif")) return KEY_elsif;
5384 break;
a0d0e21e
LW
5385 case 6:
5386 if (strEQ(d,"exists")) return KEY_exists;
cea2e8a9 5387 if (strEQ(d,"elseif")) Perl_warn(aTHX_ "elseif should be elsif");
a0d0e21e 5388 break;
79072805 5389 case 8:
a0d0e21e
LW
5390 if (strEQ(d,"endgrent")) return -KEY_endgrent;
5391 if (strEQ(d,"endpwent")) return -KEY_endpwent;
79072805
LW
5392 break;
5393 case 9:
a0d0e21e 5394 if (strEQ(d,"endnetent")) return -KEY_endnetent;
79072805
LW
5395 break;
5396 case 10:
a0d0e21e
LW
5397 if (strEQ(d,"endhostent")) return -KEY_endhostent;
5398 if (strEQ(d,"endservent")) return -KEY_endservent;
79072805
LW
5399 break;
5400 case 11:
a0d0e21e 5401 if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
79072805 5402 break;
a687059c 5403 }
a687059c 5404 break;
79072805
LW
5405 case 'f':
5406 switch (len) {
5407 case 3:
5408 if (strEQ(d,"for")) return KEY_for;
5409 break;
5410 case 4:
a0d0e21e 5411 if (strEQ(d,"fork")) return -KEY_fork;
79072805
LW
5412 break;
5413 case 5:
a0d0e21e
LW
5414 if (strEQ(d,"fcntl")) return -KEY_fcntl;
5415 if (strEQ(d,"flock")) return -KEY_flock;
79072805
LW
5416 break;
5417 case 6:
5418 if (strEQ(d,"format")) return KEY_format;
a0d0e21e 5419 if (strEQ(d,"fileno")) return -KEY_fileno;
79072805
LW
5420 break;
5421 case 7:
5422 if (strEQ(d,"foreach")) return KEY_foreach;
5423 break;
5424 case 8:
a0d0e21e 5425 if (strEQ(d,"formline")) return -KEY_formline;
79072805 5426 break;
378cc40b 5427 }
a687059c 5428 break;
79072805 5429 case 'g':
a687059c
LW
5430 if (strnEQ(d,"get",3)) {
5431 d += 3;
5432 if (*d == 'p') {
79072805
LW
5433 switch (len) {
5434 case 7:
a0d0e21e
LW
5435 if (strEQ(d,"ppid")) return -KEY_getppid;
5436 if (strEQ(d,"pgrp")) return -KEY_getpgrp;
79072805
LW
5437 break;
5438 case 8:
a0d0e21e
LW
5439 if (strEQ(d,"pwent")) return -KEY_getpwent;
5440 if (strEQ(d,"pwnam")) return -KEY_getpwnam;
5441 if (strEQ(d,"pwuid")) return -KEY_getpwuid;
79072805
LW
5442 break;
5443 case 11:
a0d0e21e
LW
5444 if (strEQ(d,"peername")) return -KEY_getpeername;
5445 if (strEQ(d,"protoent")) return -KEY_getprotoent;
5446 if (strEQ(d,"priority")) return -KEY_getpriority;
79072805
LW
5447 break;
5448 case 14:
a0d0e21e 5449 if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
79072805
LW
5450 break;
5451 case 16:
a0d0e21e 5452 if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
79072805
LW
5453 break;
5454 }
a687059c
LW
5455 }
5456 else if (*d == 'h') {
a0d0e21e
LW
5457 if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
5458 if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
5459 if (strEQ(d,"hostent")) return -KEY_gethostent;
a687059c
LW
5460 }
5461 else if (*d == 'n') {
a0d0e21e
LW
5462 if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
5463 if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
5464 if (strEQ(d,"netent")) return -KEY_getnetent;
a687059c
LW
5465 }
5466 else if (*d == 's') {
a0d0e21e
LW
5467 if (strEQ(d,"servbyname")) return -KEY_getservbyname;
5468 if (strEQ(d,"servbyport")) return -KEY_getservbyport;
5469 if (strEQ(d,"servent")) return -KEY_getservent;
5470 if (strEQ(d,"sockname")) return -KEY_getsockname;
5471 if (strEQ(d,"sockopt")) return -KEY_getsockopt;
a687059c
LW
5472 }
5473 else if (*d == 'g') {
a0d0e21e
LW
5474 if (strEQ(d,"grent")) return -KEY_getgrent;
5475 if (strEQ(d,"grnam")) return -KEY_getgrnam;
5476 if (strEQ(d,"grgid")) return -KEY_getgrgid;
a687059c
LW
5477 }
5478 else if (*d == 'l') {
a0d0e21e 5479 if (strEQ(d,"login")) return -KEY_getlogin;
a687059c 5480 }
a0d0e21e 5481 else if (strEQ(d,"c")) return -KEY_getc;
79072805 5482 break;
a687059c 5483 }
79072805
LW
5484 switch (len) {
5485 case 2:
a0d0e21e
LW
5486 if (strEQ(d,"gt")) return -KEY_gt;
5487 if (strEQ(d,"ge")) return -KEY_ge;
79072805
LW
5488 break;
5489 case 4:
5490 if (strEQ(d,"grep")) return KEY_grep;
5491 if (strEQ(d,"goto")) return KEY_goto;
fb73857a 5492 if (strEQ(d,"glob")) return KEY_glob;
79072805
LW
5493 break;
5494 case 6:
a0d0e21e 5495 if (strEQ(d,"gmtime")) return -KEY_gmtime;
79072805 5496 break;
378cc40b 5497 }
a687059c 5498 break;
79072805 5499 case 'h':
a0d0e21e 5500 if (strEQ(d,"hex")) return -KEY_hex;
a687059c 5501 break;
7d07dbc2
MB
5502 case 'I':
5503 if (strEQ(d,"INIT")) return KEY_INIT;
5504 break;
79072805
LW
5505 case 'i':
5506 switch (len) {
5507 case 2:
5508 if (strEQ(d,"if")) return KEY_if;
5509 break;
5510 case 3:
a0d0e21e 5511 if (strEQ(d,"int")) return -KEY_int;
79072805
LW
5512 break;
5513 case 5:
a0d0e21e
LW
5514 if (strEQ(d,"index")) return -KEY_index;
5515 if (strEQ(d,"ioctl")) return -KEY_ioctl;
79072805
LW
5516 break;
5517 }
a687059c 5518 break;
79072805 5519 case 'j':
a0d0e21e 5520 if (strEQ(d,"join")) return -KEY_join;
a687059c 5521 break;
79072805
LW
5522 case 'k':
5523 if (len == 4) {
3a6a8333 5524 if (strEQ(d,"keys")) return -KEY_keys;
a0d0e21e 5525 if (strEQ(d,"kill")) return -KEY_kill;
663a0e37 5526 }
79072805 5527 break;
79072805
LW
5528 case 'l':
5529 switch (len) {
5530 case 2:
a0d0e21e
LW
5531 if (strEQ(d,"lt")) return -KEY_lt;
5532 if (strEQ(d,"le")) return -KEY_le;
5533 if (strEQ(d,"lc")) return -KEY_lc;
79072805
LW
5534 break;
5535 case 3:
a0d0e21e 5536 if (strEQ(d,"log")) return -KEY_log;
79072805
LW
5537 break;
5538 case 4:
5539 if (strEQ(d,"last")) return KEY_last;
a0d0e21e 5540 if (strEQ(d,"link")) return -KEY_link;
c0329465 5541 if (strEQ(d,"lock")) return -KEY_lock;
395c3793 5542 break;
79072805
LW
5543 case 5:
5544 if (strEQ(d,"local")) return KEY_local;
a0d0e21e 5545 if (strEQ(d,"lstat")) return -KEY_lstat;
79072805
LW
5546 break;
5547 case 6:
a0d0e21e
LW
5548 if (strEQ(d,"length")) return -KEY_length;
5549 if (strEQ(d,"listen")) return -KEY_listen;
79072805
LW
5550 break;
5551 case 7:
a0d0e21e 5552 if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
79072805
LW
5553 break;
5554 case 9:
a0d0e21e 5555 if (strEQ(d,"localtime")) return -KEY_localtime;
395c3793
LW
5556 break;
5557 }
a687059c 5558 break;
79072805
LW
5559 case 'm':
5560 switch (len) {
5561 case 1: return KEY_m;
93a17b20
LW
5562 case 2:
5563 if (strEQ(d,"my")) return KEY_my;
5564 break;
a0d0e21e
LW
5565 case 3:
5566 if (strEQ(d,"map")) return KEY_map;
5567 break;
79072805 5568 case 5:
a0d0e21e 5569 if (strEQ(d,"mkdir")) return -KEY_mkdir;
79072805
LW
5570 break;
5571 case 6:
a0d0e21e
LW
5572 if (strEQ(d,"msgctl")) return -KEY_msgctl;
5573 if (strEQ(d,"msgget")) return -KEY_msgget;
5574 if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
5575 if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
79072805
LW
5576 break;
5577 }
a687059c 5578 break;
79072805
LW
5579 case 'n':
5580 if (strEQ(d,"next")) return KEY_next;
a0d0e21e
LW
5581 if (strEQ(d,"ne")) return -KEY_ne;
5582 if (strEQ(d,"not")) return -KEY_not;
5583 if (strEQ(d,"no")) return KEY_no;
a687059c 5584 break;
79072805
LW
5585 case 'o':
5586 switch (len) {
463ee0b2 5587 case 2:
a0d0e21e 5588 if (strEQ(d,"or")) return -KEY_or;
463ee0b2 5589 break;
79072805 5590 case 3:
a0d0e21e
LW
5591 if (strEQ(d,"ord")) return -KEY_ord;
5592 if (strEQ(d,"oct")) return -KEY_oct;
77ca0c92 5593 if (strEQ(d,"our")) return KEY_our;
79072805
LW
5594 break;
5595 case 4:
a0d0e21e 5596 if (strEQ(d,"open")) return -KEY_open;
79072805
LW
5597 break;
5598 case 7:
a0d0e21e 5599 if (strEQ(d,"opendir")) return -KEY_opendir;
79072805 5600 break;
fe14fcc3 5601 }
a687059c 5602 break;
79072805
LW
5603 case 'p':
5604 switch (len) {
5605 case 3:
4e553d73 5606 if (strEQ(d,"pop")) return -KEY_pop;
a0d0e21e 5607 if (strEQ(d,"pos")) return KEY_pos;
79072805
LW
5608 break;
5609 case 4:
3a6a8333 5610 if (strEQ(d,"push")) return -KEY_push;
a0d0e21e
LW
5611 if (strEQ(d,"pack")) return -KEY_pack;
5612 if (strEQ(d,"pipe")) return -KEY_pipe;
79072805
LW
5613 break;
5614 case 5:
5615 if (strEQ(d,"print")) return KEY_print;
5616 break;
5617 case 6:
5618 if (strEQ(d,"printf")) return KEY_printf;
5619 break;
5620 case 7:
5621 if (strEQ(d,"package")) return KEY_package;
5622 break;
c07a80fd 5623 case 9:
5624 if (strEQ(d,"prototype")) return KEY_prototype;
663a0e37 5625 }
79072805
LW
5626 break;
5627 case 'q':
5628 if (len <= 2) {
5629 if (strEQ(d,"q")) return KEY_q;
8782bef2 5630 if (strEQ(d,"qr")) return KEY_qr;
79072805 5631 if (strEQ(d,"qq")) return KEY_qq;
8990e307 5632 if (strEQ(d,"qw")) return KEY_qw;
79072805 5633 if (strEQ(d,"qx")) return KEY_qx;
663a0e37 5634 }
a0d0e21e 5635 else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
79072805
LW
5636 break;
5637 case 'r':
5638 switch (len) {
5639 case 3:
a0d0e21e 5640 if (strEQ(d,"ref")) return -KEY_ref;
79072805
LW
5641 break;
5642 case 4:
a0d0e21e
LW
5643 if (strEQ(d,"read")) return -KEY_read;
5644 if (strEQ(d,"rand")) return -KEY_rand;
5645 if (strEQ(d,"recv")) return -KEY_recv;
79072805
LW
5646 if (strEQ(d,"redo")) return KEY_redo;
5647 break;
5648 case 5:
a0d0e21e
LW
5649 if (strEQ(d,"rmdir")) return -KEY_rmdir;
5650 if (strEQ(d,"reset")) return -KEY_reset;
79072805
LW
5651 break;
5652 case 6:
5653 if (strEQ(d,"return")) return KEY_return;
a0d0e21e
LW
5654 if (strEQ(d,"rename")) return -KEY_rename;
5655 if (strEQ(d,"rindex")) return -KEY_rindex;
79072805
LW
5656 break;
5657 case 7:
ec4ab249 5658 if (strEQ(d,"require")) return KEY_require;
a0d0e21e
LW
5659 if (strEQ(d,"reverse")) return -KEY_reverse;
5660 if (strEQ(d,"readdir")) return -KEY_readdir;
79072805
LW
5661 break;
5662 case 8:
a0d0e21e
LW
5663 if (strEQ(d,"readlink")) return -KEY_readlink;
5664 if (strEQ(d,"readline")) return -KEY_readline;
5665 if (strEQ(d,"readpipe")) return -KEY_readpipe;
79072805
LW
5666 break;
5667 case 9:
a0d0e21e 5668 if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
79072805 5669 break;
a687059c 5670 }
79072805
LW
5671 break;
5672 case 's':
a687059c 5673 switch (d[1]) {
79072805 5674 case 0: return KEY_s;
a687059c 5675 case 'c':
79072805 5676 if (strEQ(d,"scalar")) return KEY_scalar;
a687059c
LW
5677 break;
5678 case 'e':
79072805
LW
5679 switch (len) {
5680 case 4:
a0d0e21e
LW
5681 if (strEQ(d,"seek")) return -KEY_seek;
5682 if (strEQ(d,"send")) return -KEY_send;
79072805
LW
5683 break;
5684 case 5:
a0d0e21e 5685 if (strEQ(d,"semop")) return -KEY_semop;
79072805
LW
5686 break;
5687 case 6:
a0d0e21e
LW
5688 if (strEQ(d,"select")) return -KEY_select;
5689 if (strEQ(d,"semctl")) return -KEY_semctl;
5690 if (strEQ(d,"semget")) return -KEY_semget;
79072805
LW
5691 break;
5692 case 7:
a0d0e21e
LW
5693 if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
5694 if (strEQ(d,"seekdir")) return -KEY_seekdir;
79072805
LW
5695 break;
5696 case 8:
a0d0e21e
LW
5697 if (strEQ(d,"setpwent")) return -KEY_setpwent;
5698 if (strEQ(d,"setgrent")) return -KEY_setgrent;
79072805
LW
5699 break;
5700 case 9:
a0d0e21e 5701 if (strEQ(d,"setnetent")) return -KEY_setnetent;
79072805
LW
5702 break;
5703 case 10:
a0d0e21e
LW
5704 if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
5705 if (strEQ(d,"sethostent")) return -KEY_sethostent;
5706 if (strEQ(d,"setservent")) return -KEY_setservent;
79072805
LW
5707 break;
5708 case 11:
a0d0e21e
LW
5709 if (strEQ(d,"setpriority")) return -KEY_setpriority;
5710 if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
79072805
LW
5711 break;
5712 }
a687059c
LW
5713 break;
5714 case 'h':
79072805
LW
5715 switch (len) {
5716 case 5:
3a6a8333 5717 if (strEQ(d,"shift")) return -KEY_shift;
79072805
LW
5718 break;
5719 case 6:
a0d0e21e
LW
5720 if (strEQ(d,"shmctl")) return -KEY_shmctl;
5721 if (strEQ(d,"shmget")) return -KEY_shmget;
79072805
LW
5722 break;
5723 case 7:
a0d0e21e 5724 if (strEQ(d,"shmread")) return -KEY_shmread;
79072805
LW
5725 break;
5726 case 8:
a0d0e21e
LW
5727 if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
5728 if (strEQ(d,"shutdown")) return -KEY_shutdown;
79072805
LW
5729 break;
5730 }
a687059c
LW
5731 break;
5732 case 'i':
a0d0e21e 5733 if (strEQ(d,"sin")) return -KEY_sin;
a687059c
LW
5734 break;
5735 case 'l':
a0d0e21e 5736 if (strEQ(d,"sleep")) return -KEY_sleep;
a687059c
LW
5737 break;
5738 case 'o':
79072805 5739 if (strEQ(d,"sort")) return KEY_sort;
a0d0e21e
LW
5740 if (strEQ(d,"socket")) return -KEY_socket;
5741 if (strEQ(d,"socketpair")) return -KEY_socketpair;
a687059c
LW
5742 break;
5743 case 'p':
79072805 5744 if (strEQ(d,"split")) return KEY_split;
a0d0e21e 5745 if (strEQ(d,"sprintf")) return -KEY_sprintf;
3a6a8333 5746 if (strEQ(d,"splice")) return -KEY_splice;
a687059c
LW
5747 break;
5748 case 'q':
a0d0e21e 5749 if (strEQ(d,"sqrt")) return -KEY_sqrt;
a687059c
LW
5750 break;
5751 case 'r':
a0d0e21e 5752 if (strEQ(d,"srand")) return -KEY_srand;
a687059c
LW
5753 break;
5754 case 't':
a0d0e21e 5755 if (strEQ(d,"stat")) return -KEY_stat;
79072805 5756 if (strEQ(d,"study")) return KEY_study;
a687059c
LW
5757 break;
5758 case 'u':
a0d0e21e 5759 if (strEQ(d,"substr")) return -KEY_substr;
79072805 5760 if (strEQ(d,"sub")) return KEY_sub;
a687059c
LW
5761 break;
5762 case 'y':
79072805
LW
5763 switch (len) {
5764 case 6:
a0d0e21e 5765 if (strEQ(d,"system")) return -KEY_system;
79072805
LW
5766 break;
5767 case 7:
a0d0e21e
LW
5768 if (strEQ(d,"symlink")) return -KEY_symlink;
5769 if (strEQ(d,"syscall")) return -KEY_syscall;
137443ea 5770 if (strEQ(d,"sysopen")) return -KEY_sysopen;
5771 if (strEQ(d,"sysread")) return -KEY_sysread;
5772 if (strEQ(d,"sysseek")) return -KEY_sysseek;
79072805
LW
5773 break;
5774 case 8:
a0d0e21e 5775 if (strEQ(d,"syswrite")) return -KEY_syswrite;
79072805 5776 break;
a687059c 5777 }
a687059c
LW
5778 break;
5779 }
5780 break;
79072805
LW
5781 case 't':
5782 switch (len) {
5783 case 2:
5784 if (strEQ(d,"tr")) return KEY_tr;
5785 break;
463ee0b2
LW
5786 case 3:
5787 if (strEQ(d,"tie")) return KEY_tie;
5788 break;
79072805 5789 case 4:
a0d0e21e 5790 if (strEQ(d,"tell")) return -KEY_tell;
c07a80fd 5791 if (strEQ(d,"tied")) return KEY_tied;
a0d0e21e 5792 if (strEQ(d,"time")) return -KEY_time;
79072805
LW
5793 break;
5794 case 5:
a0d0e21e 5795 if (strEQ(d,"times")) return -KEY_times;
79072805
LW
5796 break;
5797 case 7:
a0d0e21e 5798 if (strEQ(d,"telldir")) return -KEY_telldir;
79072805
LW
5799 break;
5800 case 8:
a0d0e21e 5801 if (strEQ(d,"truncate")) return -KEY_truncate;
79072805 5802 break;
378cc40b 5803 }
a687059c 5804 break;
79072805
LW
5805 case 'u':
5806 switch (len) {
5807 case 2:
a0d0e21e
LW
5808 if (strEQ(d,"uc")) return -KEY_uc;
5809 break;
5810 case 3:
5811 if (strEQ(d,"use")) return KEY_use;
79072805
LW
5812 break;
5813 case 5:
5814 if (strEQ(d,"undef")) return KEY_undef;
5815 if (strEQ(d,"until")) return KEY_until;
463ee0b2 5816 if (strEQ(d,"untie")) return KEY_untie;
a0d0e21e
LW
5817 if (strEQ(d,"utime")) return -KEY_utime;
5818 if (strEQ(d,"umask")) return -KEY_umask;
79072805
LW
5819 break;
5820 case 6:
5821 if (strEQ(d,"unless")) return KEY_unless;
a0d0e21e
LW
5822 if (strEQ(d,"unpack")) return -KEY_unpack;
5823 if (strEQ(d,"unlink")) return -KEY_unlink;
79072805
LW
5824 break;
5825 case 7:
3a6a8333 5826 if (strEQ(d,"unshift")) return -KEY_unshift;
a0d0e21e 5827 if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
79072805 5828 break;
a687059c
LW
5829 }
5830 break;
79072805 5831 case 'v':
a0d0e21e
LW
5832 if (strEQ(d,"values")) return -KEY_values;
5833 if (strEQ(d,"vec")) return -KEY_vec;
a687059c 5834 break;
79072805
LW
5835 case 'w':
5836 switch (len) {
5837 case 4:
a0d0e21e
LW
5838 if (strEQ(d,"warn")) return -KEY_warn;
5839 if (strEQ(d,"wait")) return -KEY_wait;
79072805
LW
5840 break;
5841 case 5:
5842 if (strEQ(d,"while")) return KEY_while;
a0d0e21e 5843 if (strEQ(d,"write")) return -KEY_write;
79072805
LW
5844 break;
5845 case 7:
a0d0e21e 5846 if (strEQ(d,"waitpid")) return -KEY_waitpid;
79072805
LW
5847 break;
5848 case 9:
a0d0e21e 5849 if (strEQ(d,"wantarray")) return -KEY_wantarray;
79072805 5850 break;
2f3197b3 5851 }
a687059c 5852 break;
79072805 5853 case 'x':
a0d0e21e
LW
5854 if (len == 1) return -KEY_x;
5855 if (strEQ(d,"xor")) return -KEY_xor;
a687059c 5856 break;
79072805
LW
5857 case 'y':
5858 if (len == 1) return KEY_y;
5859 break;
5860 case 'z':
a687059c
LW
5861 break;
5862 }
79072805 5863 return 0;
a687059c
LW
5864}
5865
76e3520e 5866STATIC void
cea2e8a9 5867S_checkcomma(pTHX_ register char *s, char *name, char *what)
a687059c 5868{
2f3197b3
LW
5869 char *w;
5870
d008e5eb 5871 if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
d008e5eb
GS
5872 if (ckWARN(WARN_SYNTAX)) {
5873 int level = 1;
5874 for (w = s+2; *w && level; w++) {
5875 if (*w == '(')
5876 ++level;
5877 else if (*w == ')')
5878 --level;
5879 }
5880 if (*w)
5881 for (; *w && isSPACE(*w); w++) ;
5882 if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
65cec589
GS
5883 Perl_warner(aTHX_ WARN_SYNTAX,
5884 "%s (...) interpreted as function",name);
d008e5eb 5885 }
2f3197b3 5886 }
3280af22 5887 while (s < PL_bufend && isSPACE(*s))
2f3197b3 5888 s++;
a687059c
LW
5889 if (*s == '(')
5890 s++;
3280af22 5891 while (s < PL_bufend && isSPACE(*s))
a687059c 5892 s++;
7e2040f0 5893 if (isIDFIRST_lazy_if(s,UTF)) {
2f3197b3 5894 w = s++;
7e2040f0 5895 while (isALNUM_lazy_if(s,UTF))
a687059c 5896 s++;
3280af22 5897 while (s < PL_bufend && isSPACE(*s))
a687059c 5898 s++;
e929a76b 5899 if (*s == ',') {
463ee0b2 5900 int kw;
e929a76b 5901 *s = '\0';
864dbfa3 5902 kw = keyword(w, s - w) || get_cv(w, FALSE) != 0;
e929a76b 5903 *s = ',';
463ee0b2 5904 if (kw)
e929a76b 5905 return;
cea2e8a9 5906 Perl_croak(aTHX_ "No comma allowed after %s", what);
463ee0b2
LW
5907 }
5908 }
5909}
5910
423cee85
JH
5911/* Either returns sv, or mortalizes sv and returns a new SV*.
5912 Best used as sv=new_constant(..., sv, ...).
5913 If s, pv are NULL, calls subroutine with one argument,
5914 and type is used with error messages only. */
5915
b3ac6de7 5916STATIC SV *
dff6d3cd 5917S_new_constant(pTHX_ char *s, STRLEN len, const char *key, SV *sv, SV *pv,
9b0e499b 5918 const char *type)
b3ac6de7 5919{
b3ac6de7 5920 dSP;
3280af22 5921 HV *table = GvHV(PL_hintgv); /* ^H */
b3ac6de7 5922 SV *res;
b3ac6de7
IZ
5923 SV **cvp;
5924 SV *cv, *typesv;
f0af216f 5925 const char *why1, *why2, *why3;
4e553d73 5926
f0af216f 5927 if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
423cee85
JH
5928 SV *msg;
5929
f0af216f 5930 why2 = strEQ(key,"charnames")
41ab332f 5931 ? "(possibly a missing \"use charnames ...\")"
f0af216f 5932 : "";
4e553d73 5933 msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s",
41ab332f
JH
5934 (type ? type: "undef"), why2);
5935
5936 /* This is convoluted and evil ("goto considered harmful")
5937 * but I do not understand the intricacies of all the different
5938 * failure modes of %^H in here. The goal here is to make
5939 * the most probable error message user-friendly. --jhi */
5940
5941 goto msgdone;
5942
423cee85 5943 report:
4e553d73 5944 msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s",
f0af216f 5945 (type ? type: "undef"), why1, why2, why3);
41ab332f 5946 msgdone:
423cee85
JH
5947 yyerror(SvPVX(msg));
5948 SvREFCNT_dec(msg);
5949 return sv;
5950 }
b3ac6de7
IZ
5951 cvp = hv_fetch(table, key, strlen(key), FALSE);
5952 if (!cvp || !SvOK(*cvp)) {
423cee85
JH
5953 why1 = "$^H{";
5954 why2 = key;
f0af216f 5955 why3 = "} is not defined";
423cee85 5956 goto report;
b3ac6de7
IZ
5957 }
5958 sv_2mortal(sv); /* Parent created it permanently */
5959 cv = *cvp;
423cee85
JH
5960 if (!pv && s)
5961 pv = sv_2mortal(newSVpvn(s, len));
5962 if (type && pv)
5963 typesv = sv_2mortal(newSVpv(type, 0));
b3ac6de7 5964 else
423cee85 5965 typesv = &PL_sv_undef;
4e553d73 5966
e788e7d3 5967 PUSHSTACKi(PERLSI_OVERLOAD);
423cee85
JH
5968 ENTER ;
5969 SAVETMPS;
4e553d73 5970
423cee85 5971 PUSHMARK(SP) ;
a5845cb7 5972 EXTEND(sp, 3);
423cee85
JH
5973 if (pv)
5974 PUSHs(pv);
b3ac6de7 5975 PUSHs(sv);
423cee85
JH
5976 if (pv)
5977 PUSHs(typesv);
b3ac6de7 5978 PUTBACK;
423cee85 5979 call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL));
4e553d73 5980
423cee85 5981 SPAGAIN ;
4e553d73 5982
423cee85 5983 /* Check the eval first */
9b0e499b 5984 if (!PL_in_eval && SvTRUE(ERRSV)) {
423cee85
JH
5985 STRLEN n_a;
5986 sv_catpv(ERRSV, "Propagated");
5987 yyerror(SvPV(ERRSV, n_a)); /* Duplicates the message inside eval */
e1f15930 5988 (void)POPs;
423cee85
JH
5989 res = SvREFCNT_inc(sv);
5990 }
5991 else {
5992 res = POPs;
e1f15930 5993 (void)SvREFCNT_inc(res);
423cee85 5994 }
4e553d73 5995
423cee85
JH
5996 PUTBACK ;
5997 FREETMPS ;
5998 LEAVE ;
b3ac6de7 5999 POPSTACK;
4e553d73 6000
b3ac6de7 6001 if (!SvOK(res)) {
423cee85
JH
6002 why1 = "Call to &{$^H{";
6003 why2 = key;
f0af216f 6004 why3 = "}} did not return a defined value";
423cee85
JH
6005 sv = res;
6006 goto report;
9b0e499b 6007 }
423cee85 6008
9b0e499b 6009 return res;
b3ac6de7 6010}
4e553d73 6011
76e3520e 6012STATIC char *
cea2e8a9 6013S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
463ee0b2
LW
6014{
6015 register char *d = dest;
8903cb82 6016 register char *e = d + destlen - 3; /* two-character token, ending NUL */
463ee0b2 6017 for (;;) {
8903cb82 6018 if (d >= e)
cea2e8a9 6019 Perl_croak(aTHX_ ident_too_long);
834a4ddd 6020 if (isALNUM(*s)) /* UTF handled below */
463ee0b2 6021 *d++ = *s++;
7e2040f0 6022 else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
463ee0b2
LW
6023 *d++ = ':';
6024 *d++ = ':';
6025 s++;
6026 }
c3e0f903 6027 else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
463ee0b2
LW
6028 *d++ = *s++;
6029 *d++ = *s++;
6030 }
fd400ab9 6031 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
a0ed51b3 6032 char *t = s + UTF8SKIP(s);
fd400ab9 6033 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
a0ed51b3
LW
6034 t += UTF8SKIP(t);
6035 if (d + (t - s) > e)
cea2e8a9 6036 Perl_croak(aTHX_ ident_too_long);
a0ed51b3
LW
6037 Copy(s, d, t - s, char);
6038 d += t - s;
6039 s = t;
6040 }
463ee0b2
LW
6041 else {
6042 *d = '\0';
6043 *slp = d - dest;
6044 return s;
e929a76b 6045 }
378cc40b
LW
6046 }
6047}
6048
76e3520e 6049STATIC char *
cea2e8a9 6050S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
378cc40b
LW
6051{
6052 register char *d;
8903cb82 6053 register char *e;
79072805 6054 char *bracket = 0;
748a9306 6055 char funny = *s++;
378cc40b 6056
a0d0e21e
LW
6057 if (isSPACE(*s))
6058 s = skipspace(s);
378cc40b 6059 d = dest;
8903cb82 6060 e = d + destlen - 3; /* two-character token, ending NUL */
de3bb511 6061 if (isDIGIT(*s)) {
8903cb82 6062 while (isDIGIT(*s)) {
6063 if (d >= e)
cea2e8a9 6064 Perl_croak(aTHX_ ident_too_long);
378cc40b 6065 *d++ = *s++;
8903cb82 6066 }
378cc40b
LW
6067 }
6068 else {
463ee0b2 6069 for (;;) {
8903cb82 6070 if (d >= e)
cea2e8a9 6071 Perl_croak(aTHX_ ident_too_long);
834a4ddd 6072 if (isALNUM(*s)) /* UTF handled below */
463ee0b2 6073 *d++ = *s++;
7e2040f0 6074 else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) {
463ee0b2
LW
6075 *d++ = ':';
6076 *d++ = ':';
6077 s++;
6078 }
a0d0e21e 6079 else if (*s == ':' && s[1] == ':') {
463ee0b2
LW
6080 *d++ = *s++;
6081 *d++ = *s++;
6082 }
fd400ab9 6083 else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
a0ed51b3 6084 char *t = s + UTF8SKIP(s);
fd400ab9 6085 while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
a0ed51b3
LW
6086 t += UTF8SKIP(t);
6087 if (d + (t - s) > e)
cea2e8a9 6088 Perl_croak(aTHX_ ident_too_long);
a0ed51b3
LW
6089 Copy(s, d, t - s, char);
6090 d += t - s;
6091 s = t;
6092 }
463ee0b2
LW
6093 else
6094 break;
6095 }
378cc40b
LW
6096 }
6097 *d = '\0';
6098 d = dest;
79072805 6099 if (*d) {
3280af22
NIS
6100 if (PL_lex_state != LEX_NORMAL)
6101 PL_lex_state = LEX_INTERPENDMAYBE;
79072805 6102 return s;
378cc40b 6103 }
748a9306 6104 if (*s == '$' && s[1] &&
7e2040f0 6105 (isALNUM_lazy_if(s+1,UTF) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
5cd24f17 6106 {
4810e5ec 6107 return s;
5cd24f17 6108 }
79072805
LW
6109 if (*s == '{') {
6110 bracket = s;
6111 s++;
6112 }
6113 else if (ck_uni)
6114 check_uni();
93a17b20 6115 if (s < send)
79072805
LW
6116 *d = *s++;
6117 d[1] = '\0';
2b92dfce 6118 if (*d == '^' && *s && isCONTROLVAR(*s)) {
bbce6d69 6119 *d = toCTRL(*s);
6120 s++;
de3bb511 6121 }
79072805 6122 if (bracket) {
748a9306 6123 if (isSPACE(s[-1])) {
fa83b5b6 6124 while (s < send) {
6125 char ch = *s++;
bf4acbe4 6126 if (!SPACE_OR_TAB(ch)) {
fa83b5b6 6127 *d = ch;
6128 break;
6129 }
6130 }
748a9306 6131 }
7e2040f0 6132 if (isIDFIRST_lazy_if(d,UTF)) {
79072805 6133 d++;
a0ed51b3
LW
6134 if (UTF) {
6135 e = s;
155aba94 6136 while ((e < send && isALNUM_lazy_if(e,UTF)) || *e == ':') {
a0ed51b3 6137 e += UTF8SKIP(e);
fd400ab9 6138 while (e < send && UTF8_IS_CONTINUED(*e) && is_utf8_mark((U8*)e))
a0ed51b3
LW
6139 e += UTF8SKIP(e);
6140 }
6141 Copy(s, d, e - s, char);
6142 d += e - s;
6143 s = e;
6144 }
6145 else {
2b92dfce 6146 while ((isALNUM(*s) || *s == ':') && d < e)
a0ed51b3 6147 *d++ = *s++;
2b92dfce 6148 if (d >= e)
cea2e8a9 6149 Perl_croak(aTHX_ ident_too_long);
a0ed51b3 6150 }
79072805 6151 *d = '\0';
bf4acbe4 6152 while (s < send && SPACE_OR_TAB(*s)) s++;
ff68c719 6153 if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
599cee73 6154 if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
dff6d3cd 6155 const char *brack = *s == '[' ? "[...]" : "{...}";
cea2e8a9 6156 Perl_warner(aTHX_ WARN_AMBIGUOUS,
599cee73 6157 "Ambiguous use of %c{%s%s} resolved to %c%s%s",
748a9306
LW
6158 funny, dest, brack, funny, dest, brack);
6159 }
79072805 6160 bracket++;
a0be28da 6161 PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK);
79072805
LW
6162 return s;
6163 }
4e553d73
NIS
6164 }
6165 /* Handle extended ${^Foo} variables
2b92dfce
GS
6166 * 1999-02-27 mjd-perl-patch@plover.com */
6167 else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */
6168 && isALNUM(*s))
6169 {
6170 d++;
6171 while (isALNUM(*s) && d < e) {
6172 *d++ = *s++;
6173 }
6174 if (d >= e)
cea2e8a9 6175 Perl_croak(aTHX_ ident_too_long);
2b92dfce 6176 *d = '\0';
79072805
LW
6177 }
6178 if (*s == '}') {
6179 s++;
3280af22
NIS
6180 if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
6181 PL_lex_state = LEX_INTERPEND;
748a9306
LW
6182 if (funny == '#')
6183 funny = '@';
d008e5eb 6184 if (PL_lex_state == LEX_NORMAL) {
d008e5eb 6185 if (ckWARN(WARN_AMBIGUOUS) &&
864dbfa3 6186 (keyword(dest, d - dest) || get_cv(dest, FALSE)))
d008e5eb 6187 {
cea2e8a9 6188 Perl_warner(aTHX_ WARN_AMBIGUOUS,
d008e5eb
GS
6189 "Ambiguous use of %c{%s} resolved to %c%s",
6190 funny, dest, funny, dest);
6191 }
6192 }
79072805
LW
6193 }
6194 else {
6195 s = bracket; /* let the parser handle it */
93a17b20 6196 *dest = '\0';
79072805
LW
6197 }
6198 }
3280af22
NIS
6199 else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
6200 PL_lex_state = LEX_INTERPEND;
378cc40b
LW
6201 return s;
6202}
6203
cea2e8a9
GS
6204void
6205Perl_pmflag(pTHX_ U16 *pmfl, int ch)
a0d0e21e 6206{
bbce6d69 6207 if (ch == 'i')
a0d0e21e 6208 *pmfl |= PMf_FOLD;
a0d0e21e
LW
6209 else if (ch == 'g')
6210 *pmfl |= PMf_GLOBAL;
c90c0ff4 6211 else if (ch == 'c')
6212 *pmfl |= PMf_CONTINUE;
a0d0e21e
LW
6213 else if (ch == 'o')
6214 *pmfl |= PMf_KEEP;
6215 else if (ch == 'm')
6216 *pmfl |= PMf_MULTILINE;
6217 else if (ch == 's')
6218 *pmfl |= PMf_SINGLELINE;
6219 else if (ch == 'x')
6220 *pmfl |= PMf_EXTENDED;
6221}
378cc40b 6222
76e3520e 6223STATIC char *
cea2e8a9 6224S_scan_pat(pTHX_ char *start, I32 type)
378cc40b 6225{
79072805
LW
6226 PMOP *pm;
6227 char *s;
378cc40b 6228
09bef843 6229 s = scan_str(start,FALSE,FALSE);
37fd879b 6230 if (!s)
cea2e8a9 6231 Perl_croak(aTHX_ "Search pattern not terminated");
bbce6d69 6232
8782bef2 6233 pm = (PMOP*)newPMOP(type, 0);
3280af22 6234 if (PL_multi_open == '?')
79072805 6235 pm->op_pmflags |= PMf_ONCE;
8782bef2
GB
6236 if(type == OP_QR) {
6237 while (*s && strchr("iomsx", *s))
6238 pmflag(&pm->op_pmflags,*s++);
6239 }
6240 else {
6241 while (*s && strchr("iogcmsx", *s))
6242 pmflag(&pm->op_pmflags,*s++);
6243 }
4633a7c4 6244 pm->op_pmpermflags = pm->op_pmflags;
bbce6d69 6245
3280af22 6246 PL_lex_op = (OP*)pm;
79072805 6247 yylval.ival = OP_MATCH;
378cc40b
LW
6248 return s;
6249}
6250
76e3520e 6251STATIC char *
cea2e8a9 6252S_scan_subst(pTHX_ char *start)
79072805 6253{
a0d0e21e 6254 register char *s;
79072805 6255 register PMOP *pm;
4fdae800 6256 I32 first_start;
79072805
LW
6257 I32 es = 0;
6258
79072805
LW
6259 yylval.ival = OP_NULL;
6260
09bef843 6261 s = scan_str(start,FALSE,FALSE);
79072805 6262
37fd879b 6263 if (!s)
cea2e8a9 6264 Perl_croak(aTHX_ "Substitution pattern not terminated");
79072805 6265
3280af22 6266 if (s[-1] == PL_multi_open)
79072805
LW
6267 s--;
6268
3280af22 6269 first_start = PL_multi_start;
09bef843 6270 s = scan_str(s,FALSE,FALSE);
79072805 6271 if (!s) {
37fd879b 6272 if (PL_lex_stuff) {
3280af22 6273 SvREFCNT_dec(PL_lex_stuff);
37fd879b
HS
6274 PL_lex_stuff = Nullsv;
6275 }
cea2e8a9 6276 Perl_croak(aTHX_ "Substitution replacement not terminated");
a687059c 6277 }
3280af22 6278 PL_multi_start = first_start; /* so whole substitution is taken together */
2f3197b3 6279
79072805 6280 pm = (PMOP*)newPMOP(OP_SUBST, 0);
48c036b1 6281 while (*s) {
a687059c
LW
6282 if (*s == 'e') {
6283 s++;
2f3197b3 6284 es++;
a687059c 6285 }
b3eb6a9b 6286 else if (strchr("iogcmsx", *s))
a0d0e21e 6287 pmflag(&pm->op_pmflags,*s++);
48c036b1
GS
6288 else
6289 break;
378cc40b 6290 }
79072805
LW
6291
6292 if (es) {
6293 SV *repl;
0244c3a4
GS
6294 PL_sublex_info.super_bufptr = s;
6295 PL_sublex_info.super_bufend = PL_bufend;
6296 PL_multi_end = 0;
79072805 6297 pm->op_pmflags |= PMf_EVAL;
79cb57f6 6298 repl = newSVpvn("",0);
463ee0b2 6299 while (es-- > 0)
a0d0e21e 6300 sv_catpv(repl, es ? "eval " : "do ");
79072805 6301 sv_catpvn(repl, "{ ", 2);
3280af22 6302 sv_catsv(repl, PL_lex_repl);
79072805 6303 sv_catpvn(repl, " };", 2);
25da4f38 6304 SvEVALED_on(repl);
3280af22
NIS
6305 SvREFCNT_dec(PL_lex_repl);
6306 PL_lex_repl = repl;
378cc40b 6307 }
79072805 6308
4633a7c4 6309 pm->op_pmpermflags = pm->op_pmflags;
3280af22 6310 PL_lex_op = (OP*)pm;
79072805 6311 yylval.ival = OP_SUBST;
378cc40b
LW
6312 return s;
6313}
6314
76e3520e 6315STATIC char *
cea2e8a9 6316S_scan_trans(pTHX_ char *start)
378cc40b 6317{
a0d0e21e 6318 register char* s;
11343788 6319 OP *o;
79072805
LW
6320 short *tbl;
6321 I32 squash;
a0ed51b3 6322 I32 del;
79072805
LW
6323 I32 complement;
6324
6325 yylval.ival = OP_NULL;
6326
09bef843 6327 s = scan_str(start,FALSE,FALSE);
37fd879b 6328 if (!s)
cea2e8a9 6329 Perl_croak(aTHX_ "Transliteration pattern not terminated");
3280af22 6330 if (s[-1] == PL_multi_open)
2f3197b3
LW
6331 s--;
6332
09bef843 6333 s = scan_str(s,FALSE,FALSE);
79072805 6334 if (!s) {
37fd879b 6335 if (PL_lex_stuff) {
3280af22 6336 SvREFCNT_dec(PL_lex_stuff);
37fd879b
HS
6337 PL_lex_stuff = Nullsv;
6338 }
cea2e8a9 6339 Perl_croak(aTHX_ "Transliteration replacement not terminated");
a687059c 6340 }
79072805 6341
a0ed51b3 6342 complement = del = squash = 0;
6940069f 6343 while (strchr("cds", *s)) {
395c3793 6344 if (*s == 'c')
79072805 6345 complement = OPpTRANS_COMPLEMENT;
395c3793 6346 else if (*s == 'd')
a0ed51b3
LW
6347 del = OPpTRANS_DELETE;
6348 else if (*s == 's')
79072805 6349 squash = OPpTRANS_SQUASH;
395c3793
LW
6350 s++;
6351 }
8973db79
JH
6352
6353 New(803, tbl, complement&&!del?258:256, short);
6354 o = newPVOP(OP_TRANS, 0, (char*)tbl);
7948272d
NIS
6355 o->op_private = del|squash|complement|
6356 (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)|
6357 (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0);
79072805 6358
3280af22 6359 PL_lex_op = o;
79072805
LW
6360 yylval.ival = OP_TRANS;
6361 return s;
6362}
6363
76e3520e 6364STATIC char *
cea2e8a9 6365S_scan_heredoc(pTHX_ register char *s)
79072805
LW
6366{
6367 SV *herewas;
6368 I32 op_type = OP_SCALAR;
6369 I32 len;
6370 SV *tmpstr;
6371 char term;
6372 register char *d;
fc36a67e 6373 register char *e;
4633a7c4 6374 char *peek;
3280af22 6375 int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
79072805
LW
6376
6377 s += 2;
3280af22
NIS
6378 d = PL_tokenbuf;
6379 e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
fd2d0953 6380 if (!outer)
79072805 6381 *d++ = '\n';
bf4acbe4 6382 for (peek = s; SPACE_OR_TAB(*peek); peek++) ;
4633a7c4
LW
6383 if (*peek && strchr("`'\"",*peek)) {
6384 s = peek;
79072805 6385 term = *s++;
3280af22 6386 s = delimcpy(d, e, s, PL_bufend, term, &len);
fc36a67e 6387 d += len;
3280af22 6388 if (s < PL_bufend)
79072805 6389 s++;
79072805
LW
6390 }
6391 else {
6392 if (*s == '\\')
6393 s++, term = '\'';
6394 else
6395 term = '"';
7e2040f0 6396 if (!isALNUM_lazy_if(s,UTF))
4633a7c4 6397 deprecate("bare << to mean <<\"\"");
7e2040f0 6398 for (; isALNUM_lazy_if(s,UTF); s++) {
fc36a67e 6399 if (d < e)
6400 *d++ = *s;
6401 }
6402 }
3280af22 6403 if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
cea2e8a9 6404 Perl_croak(aTHX_ "Delimiter for here document is too long");
79072805
LW
6405 *d++ = '\n';
6406 *d = '\0';
3280af22 6407 len = d - PL_tokenbuf;
6a27c188 6408#ifndef PERL_STRICT_CR
f63a84b2
LW
6409 d = strchr(s, '\r');
6410 if (d) {
6411 char *olds = s;
6412 s = d;
3280af22 6413 while (s < PL_bufend) {
f63a84b2
LW
6414 if (*s == '\r') {
6415 *d++ = '\n';
6416 if (*++s == '\n')
6417 s++;
6418 }
6419 else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
6420 *d++ = *s++;
6421 s++;
6422 }
6423 else
6424 *d++ = *s++;
6425 }
6426 *d = '\0';
3280af22
NIS
6427 PL_bufend = d;
6428 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
f63a84b2
LW
6429 s = olds;
6430 }
6431#endif
79072805 6432 d = "\n";
3280af22 6433 if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
79cb57f6 6434 herewas = newSVpvn(s,PL_bufend-s);
79072805 6435 else
79cb57f6 6436 s--, herewas = newSVpvn(s,d-s);
79072805 6437 s += SvCUR(herewas);
748a9306 6438
8d6dde3e 6439 tmpstr = NEWSV(87,79);
748a9306
LW
6440 sv_upgrade(tmpstr, SVt_PVIV);
6441 if (term == '\'') {
79072805 6442 op_type = OP_CONST;
748a9306
LW
6443 SvIVX(tmpstr) = -1;
6444 }
6445 else if (term == '`') {
79072805 6446 op_type = OP_BACKTICK;
748a9306
LW
6447 SvIVX(tmpstr) = '\\';
6448 }
79072805
LW
6449
6450 CLINE;
57843af0 6451 PL_multi_start = CopLINE(PL_curcop);
3280af22
NIS
6452 PL_multi_open = PL_multi_close = '<';
6453 term = *PL_tokenbuf;
0244c3a4
GS
6454 if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
6455 char *bufptr = PL_sublex_info.super_bufptr;
6456 char *bufend = PL_sublex_info.super_bufend;
6457 char *olds = s - SvCUR(herewas);
6458 s = strchr(bufptr, '\n');
6459 if (!s)
6460 s = bufend;
6461 d = s;
6462 while (s < bufend &&
6463 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
6464 if (*s++ == '\n')
57843af0 6465 CopLINE_inc(PL_curcop);
0244c3a4
GS
6466 }
6467 if (s >= bufend) {
57843af0 6468 CopLINE_set(PL_curcop, PL_multi_start);
0244c3a4
GS
6469 missingterm(PL_tokenbuf);
6470 }
6471 sv_setpvn(herewas,bufptr,d-bufptr+1);
6472 sv_setpvn(tmpstr,d+1,s-d);
6473 s += len - 1;
6474 sv_catpvn(herewas,s,bufend-s);
6475 (void)strcpy(bufptr,SvPVX(herewas));
6476
6477 s = olds;
6478 goto retval;
6479 }
6480 else if (!outer) {
79072805 6481 d = s;
3280af22
NIS
6482 while (s < PL_bufend &&
6483 (*s != term || memNE(s,PL_tokenbuf,len)) ) {
79072805 6484 if (*s++ == '\n')
57843af0 6485 CopLINE_inc(PL_curcop);
79072805 6486 }
3280af22 6487 if (s >= PL_bufend) {
57843af0 6488 CopLINE_set(PL_curcop, PL_multi_start);
3280af22 6489 missingterm(PL_tokenbuf);
79072805
LW
6490 }
6491 sv_setpvn(tmpstr,d+1,s-d);
6492 s += len - 1;
57843af0 6493 CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */
49d8d3a1 6494
3280af22
NIS
6495 sv_catpvn(herewas,s,PL_bufend-s);
6496 sv_setsv(PL_linestr,herewas);
6497 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
6498 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 6499 PL_last_lop = PL_last_uni = Nullch;
79072805
LW
6500 }
6501 else
6502 sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
3280af22 6503 while (s >= PL_bufend) { /* multiple line string? */
fd2d0953 6504 if (!outer ||
3280af22 6505 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
57843af0 6506 CopLINE_set(PL_curcop, PL_multi_start);
3280af22 6507 missingterm(PL_tokenbuf);
79072805 6508 }
57843af0 6509 CopLINE_inc(PL_curcop);
3280af22 6510 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 6511 PL_last_lop = PL_last_uni = Nullch;
6a27c188 6512#ifndef PERL_STRICT_CR
3280af22 6513 if (PL_bufend - PL_linestart >= 2) {
a1529941
NIS
6514 if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
6515 (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
c6f14548 6516 {
3280af22
NIS
6517 PL_bufend[-2] = '\n';
6518 PL_bufend--;
6519 SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
f63a84b2 6520 }
3280af22
NIS
6521 else if (PL_bufend[-1] == '\r')
6522 PL_bufend[-1] = '\n';
f63a84b2 6523 }
3280af22
NIS
6524 else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
6525 PL_bufend[-1] = '\n';
f63a84b2 6526#endif
3280af22 6527 if (PERLDB_LINE && PL_curstash != PL_debstash) {
79072805
LW
6528 SV *sv = NEWSV(88,0);
6529
93a17b20 6530 sv_upgrade(sv, SVt_PVMG);
3280af22 6531 sv_setsv(sv,PL_linestr);
57843af0 6532 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop),sv);
79072805 6533 }
3280af22
NIS
6534 if (*s == term && memEQ(s,PL_tokenbuf,len)) {
6535 s = PL_bufend - 1;
79072805 6536 *s = ' ';
3280af22
NIS
6537 sv_catsv(PL_linestr,herewas);
6538 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
79072805
LW
6539 }
6540 else {
3280af22
NIS
6541 s = PL_bufend;
6542 sv_catsv(tmpstr,PL_linestr);
395c3793
LW
6543 }
6544 }
79072805 6545 s++;
0244c3a4 6546retval:
57843af0 6547 PL_multi_end = CopLINE(PL_curcop);
79072805
LW
6548 if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
6549 SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
463ee0b2 6550 Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
79072805 6551 }
8990e307 6552 SvREFCNT_dec(herewas);
0064a8a9 6553 if (UTF && !IN_BYTES && is_utf8_string((U8*)SvPVX(tmpstr), SvCUR(tmpstr)))
7948272d 6554 SvUTF8_on(tmpstr);
3280af22 6555 PL_lex_stuff = tmpstr;
79072805
LW
6556 yylval.ival = op_type;
6557 return s;
6558}
6559
02aa26ce
NT
6560/* scan_inputsymbol
6561 takes: current position in input buffer
6562 returns: new position in input buffer
6563 side-effects: yylval and lex_op are set.
6564
6565 This code handles:
6566
6567 <> read from ARGV
6568 <FH> read from filehandle
6569 <pkg::FH> read from package qualified filehandle
6570 <pkg'FH> read from package qualified filehandle
6571 <$fh> read from filehandle in $fh
6572 <*.h> filename glob
6573
6574*/
6575
76e3520e 6576STATIC char *
cea2e8a9 6577S_scan_inputsymbol(pTHX_ char *start)
79072805 6578{
02aa26ce 6579 register char *s = start; /* current position in buffer */
79072805 6580 register char *d;
fc36a67e 6581 register char *e;
1b420867 6582 char *end;
79072805
LW
6583 I32 len;
6584
3280af22
NIS
6585 d = PL_tokenbuf; /* start of temp holding space */
6586 e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
1b420867
GS
6587 end = strchr(s, '\n');
6588 if (!end)
6589 end = PL_bufend;
6590 s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */
02aa26ce
NT
6591
6592 /* die if we didn't have space for the contents of the <>,
1b420867 6593 or if it didn't end, or if we see a newline
02aa26ce
NT
6594 */
6595
3280af22 6596 if (len >= sizeof PL_tokenbuf)
cea2e8a9 6597 Perl_croak(aTHX_ "Excessively long <> operator");
1b420867 6598 if (s >= end)
cea2e8a9 6599 Perl_croak(aTHX_ "Unterminated <> operator");
02aa26ce 6600
fc36a67e 6601 s++;
02aa26ce
NT
6602
6603 /* check for <$fh>
6604 Remember, only scalar variables are interpreted as filehandles by
6605 this code. Anything more complex (e.g., <$fh{$num}>) will be
6606 treated as a glob() call.
6607 This code makes use of the fact that except for the $ at the front,
6608 a scalar variable and a filehandle look the same.
6609 */
4633a7c4 6610 if (*d == '$' && d[1]) d++;
02aa26ce
NT
6611
6612 /* allow <Pkg'VALUE> or <Pkg::VALUE> */
7e2040f0 6613 while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':'))
79072805 6614 d++;
02aa26ce
NT
6615
6616 /* If we've tried to read what we allow filehandles to look like, and
6617 there's still text left, then it must be a glob() and not a getline.
6618 Use scan_str to pull out the stuff between the <> and treat it
6619 as nothing more than a string.
6620 */
6621
3280af22 6622 if (d - PL_tokenbuf != len) {
79072805
LW
6623 yylval.ival = OP_GLOB;
6624 set_csh();
09bef843 6625 s = scan_str(start,FALSE,FALSE);
79072805 6626 if (!s)
cea2e8a9 6627 Perl_croak(aTHX_ "Glob not terminated");
79072805
LW
6628 return s;
6629 }
395c3793 6630 else {
02aa26ce 6631 /* we're in a filehandle read situation */
3280af22 6632 d = PL_tokenbuf;
02aa26ce
NT
6633
6634 /* turn <> into <ARGV> */
79072805
LW
6635 if (!len)
6636 (void)strcpy(d,"ARGV");
02aa26ce
NT
6637
6638 /* if <$fh>, create the ops to turn the variable into a
6639 filehandle
6640 */
79072805 6641 if (*d == '$') {
a0d0e21e 6642 I32 tmp;
02aa26ce
NT
6643
6644 /* try to find it in the pad for this block, otherwise find
6645 add symbol table ops
6646 */
11343788 6647 if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
f558d5af
JH
6648 SV *namesv = AvARRAY(PL_comppad_name)[tmp];
6649 if (SvFLAGS(namesv) & SVpad_OUR) {
6650 SV *sym = sv_2mortal(newSVpv(HvNAME(GvSTASH(namesv)),0));
6651 sv_catpvn(sym, "::", 2);
6652 sv_catpv(sym, d+1);
6653 d = SvPVX(sym);
6654 goto intro_sym;
6655 }
6656 else {
6657 OP *o = newOP(OP_PADSV, 0);
6658 o->op_targ = tmp;
6659 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, o);
6660 }
a0d0e21e
LW
6661 }
6662 else {
f558d5af
JH
6663 GV *gv;
6664 ++d;
6665intro_sym:
6666 gv = gv_fetchpv(d,
6667 (PL_in_eval
6668 ? (GV_ADDMULTI | GV_ADDINEVAL)
6669 : TRUE),
6670 SVt_PV);
3280af22 6671 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
a0d0e21e 6672 newUNOP(OP_RV2SV, 0,
f5284f61 6673 newGVOP(OP_GV, 0, gv)));
a0d0e21e 6674 }
f5284f61
IZ
6675 PL_lex_op->op_flags |= OPf_SPECIAL;
6676 /* we created the ops in PL_lex_op, so make yylval.ival a null op */
79072805
LW
6677 yylval.ival = OP_NULL;
6678 }
02aa26ce
NT
6679
6680 /* If it's none of the above, it must be a literal filehandle
6681 (<Foo::BAR> or <FOO>) so build a simple readline OP */
79072805 6682 else {
85e6fe83 6683 GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
3280af22 6684 PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
79072805
LW
6685 yylval.ival = OP_NULL;
6686 }
6687 }
02aa26ce 6688
79072805
LW
6689 return s;
6690}
6691
02aa26ce
NT
6692
6693/* scan_str
6694 takes: start position in buffer
09bef843
SB
6695 keep_quoted preserve \ on the embedded delimiter(s)
6696 keep_delims preserve the delimiters around the string
02aa26ce
NT
6697 returns: position to continue reading from buffer
6698 side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
6699 updates the read buffer.
6700
6701 This subroutine pulls a string out of the input. It is called for:
6702 q single quotes q(literal text)
6703 ' single quotes 'literal text'
6704 qq double quotes qq(interpolate $here please)
6705 " double quotes "interpolate $here please"
6706 qx backticks qx(/bin/ls -l)
6707 ` backticks `/bin/ls -l`
6708 qw quote words @EXPORT_OK = qw( func() $spam )
6709 m// regexp match m/this/
6710 s/// regexp substitute s/this/that/
6711 tr/// string transliterate tr/this/that/
6712 y/// string transliterate y/this/that/
6713 ($*@) sub prototypes sub foo ($)
09bef843 6714 (stuff) sub attr parameters sub foo : attr(stuff)
02aa26ce
NT
6715 <> readline or globs <FOO>, <>, <$fh>, or <*.c>
6716
6717 In most of these cases (all but <>, patterns and transliterate)
6718 yylex() calls scan_str(). m// makes yylex() call scan_pat() which
6719 calls scan_str(). s/// makes yylex() call scan_subst() which calls
6720 scan_str(). tr/// and y/// make yylex() call scan_trans() which
6721 calls scan_str().
4e553d73 6722
02aa26ce
NT
6723 It skips whitespace before the string starts, and treats the first
6724 character as the delimiter. If the delimiter is one of ([{< then
6725 the corresponding "close" character )]}> is used as the closing
6726 delimiter. It allows quoting of delimiters, and if the string has
6727 balanced delimiters ([{<>}]) it allows nesting.
6728
37fd879b
HS
6729 On success, the SV with the resulting string is put into lex_stuff or,
6730 if that is already non-NULL, into lex_repl. The second case occurs only
6731 when parsing the RHS of the special constructs s/// and tr/// (y///).
6732 For convenience, the terminating delimiter character is stuffed into
6733 SvIVX of the SV.
02aa26ce
NT
6734*/
6735
76e3520e 6736STATIC char *
09bef843 6737S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
79072805 6738{
02aa26ce
NT
6739 SV *sv; /* scalar value: string */
6740 char *tmps; /* temp string, used for delimiter matching */
6741 register char *s = start; /* current position in the buffer */
6742 register char term; /* terminating character */
6743 register char *to; /* current position in the sv's data */
6744 I32 brackets = 1; /* bracket nesting level */
89491803 6745 bool has_utf8 = FALSE; /* is there any utf8 content? */
02aa26ce
NT
6746
6747 /* skip space before the delimiter */
fb73857a 6748 if (isSPACE(*s))
6749 s = skipspace(s);
02aa26ce
NT
6750
6751 /* mark where we are, in case we need to report errors */
79072805 6752 CLINE;
02aa26ce
NT
6753
6754 /* after skipping whitespace, the next character is the terminator */
a0d0e21e 6755 term = *s;
63cd0674 6756 if (!UTF8_IS_INVARIANT((U8)term) && UTF)
89491803 6757 has_utf8 = TRUE;
b1c7b182 6758
02aa26ce 6759 /* mark where we are */
57843af0 6760 PL_multi_start = CopLINE(PL_curcop);
3280af22 6761 PL_multi_open = term;
02aa26ce
NT
6762
6763 /* find corresponding closing delimiter */
93a17b20 6764 if (term && (tmps = strchr("([{< )]}> )]}>",term)))
79072805 6765 term = tmps[5];
3280af22 6766 PL_multi_close = term;
79072805 6767
02aa26ce 6768 /* create a new SV to hold the contents. 87 is leak category, I'm
8d6dde3e
IZ
6769 assuming. 79 is the SV's initial length. What a random number. */
6770 sv = NEWSV(87,79);
ed6116ce
LW
6771 sv_upgrade(sv, SVt_PVIV);
6772 SvIVX(sv) = term;
a0d0e21e 6773 (void)SvPOK_only(sv); /* validate pointer */
02aa26ce
NT
6774
6775 /* move past delimiter and try to read a complete string */
09bef843
SB
6776 if (keep_delims)
6777 sv_catpvn(sv, s, 1);
93a17b20
LW
6778 s++;
6779 for (;;) {
02aa26ce 6780 /* extend sv if need be */
3280af22 6781 SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
02aa26ce 6782 /* set 'to' to the next character in the sv's string */
463ee0b2 6783 to = SvPVX(sv)+SvCUR(sv);
09bef843 6784
02aa26ce 6785 /* if open delimiter is the close delimiter read unbridle */
3280af22
NIS
6786 if (PL_multi_open == PL_multi_close) {
6787 for (; s < PL_bufend; s++,to++) {
02aa26ce 6788 /* embedded newlines increment the current line number */
3280af22 6789 if (*s == '\n' && !PL_rsfp)
57843af0 6790 CopLINE_inc(PL_curcop);
02aa26ce 6791 /* handle quoted delimiters */
3280af22 6792 if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
09bef843 6793 if (!keep_quoted && s[1] == term)
a0d0e21e 6794 s++;
02aa26ce 6795 /* any other quotes are simply copied straight through */
a0d0e21e
LW
6796 else
6797 *to++ = *s++;
6798 }
02aa26ce
NT
6799 /* terminate when run out of buffer (the for() condition), or
6800 have found the terminator */
93a17b20
LW
6801 else if (*s == term)
6802 break;
63cd0674 6803 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
89491803 6804 has_utf8 = TRUE;
93a17b20
LW
6805 *to = *s;
6806 }
6807 }
02aa26ce
NT
6808
6809 /* if the terminator isn't the same as the start character (e.g.,
6810 matched brackets), we have to allow more in the quoting, and
6811 be prepared for nested brackets.
6812 */
93a17b20 6813 else {
02aa26ce 6814 /* read until we run out of string, or we find the terminator */
3280af22 6815 for (; s < PL_bufend; s++,to++) {
02aa26ce 6816 /* embedded newlines increment the line count */
3280af22 6817 if (*s == '\n' && !PL_rsfp)
57843af0 6818 CopLINE_inc(PL_curcop);
02aa26ce 6819 /* backslashes can escape the open or closing characters */
3280af22 6820 if (*s == '\\' && s+1 < PL_bufend) {
09bef843
SB
6821 if (!keep_quoted &&
6822 ((s[1] == PL_multi_open) || (s[1] == PL_multi_close)))
a0d0e21e
LW
6823 s++;
6824 else
6825 *to++ = *s++;
6826 }
02aa26ce 6827 /* allow nested opens and closes */
3280af22 6828 else if (*s == PL_multi_close && --brackets <= 0)
93a17b20 6829 break;
3280af22 6830 else if (*s == PL_multi_open)
93a17b20 6831 brackets++;
63cd0674 6832 else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF)
89491803 6833 has_utf8 = TRUE;
93a17b20
LW
6834 *to = *s;
6835 }
6836 }
02aa26ce 6837 /* terminate the copied string and update the sv's end-of-string */
93a17b20 6838 *to = '\0';
463ee0b2 6839 SvCUR_set(sv, to - SvPVX(sv));
93a17b20 6840
02aa26ce
NT
6841 /*
6842 * this next chunk reads more into the buffer if we're not done yet
6843 */
6844
b1c7b182
GS
6845 if (s < PL_bufend)
6846 break; /* handle case where we are done yet :-) */
79072805 6847
6a27c188 6848#ifndef PERL_STRICT_CR
f63a84b2 6849 if (to - SvPVX(sv) >= 2) {
c6f14548
GS
6850 if ((to[-2] == '\r' && to[-1] == '\n') ||
6851 (to[-2] == '\n' && to[-1] == '\r'))
6852 {
f63a84b2
LW
6853 to[-2] = '\n';
6854 to--;
6855 SvCUR_set(sv, to - SvPVX(sv));
6856 }
6857 else if (to[-1] == '\r')
6858 to[-1] = '\n';
6859 }
6860 else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
6861 to[-1] = '\n';
6862#endif
6863
02aa26ce
NT
6864 /* if we're out of file, or a read fails, bail and reset the current
6865 line marker so we can report where the unterminated string began
6866 */
3280af22
NIS
6867 if (!PL_rsfp ||
6868 !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
c07a80fd 6869 sv_free(sv);
57843af0 6870 CopLINE_set(PL_curcop, PL_multi_start);
79072805
LW
6871 return Nullch;
6872 }
02aa26ce 6873 /* we read a line, so increment our line counter */
57843af0 6874 CopLINE_inc(PL_curcop);
a0ed51b3 6875
02aa26ce 6876 /* update debugger info */
3280af22 6877 if (PERLDB_LINE && PL_curstash != PL_debstash) {
79072805
LW
6878 SV *sv = NEWSV(88,0);
6879
93a17b20 6880 sv_upgrade(sv, SVt_PVMG);
3280af22 6881 sv_setsv(sv,PL_linestr);
57843af0 6882 av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv);
395c3793 6883 }
a0ed51b3 6884
3280af22
NIS
6885 /* having changed the buffer, we must update PL_bufend */
6886 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
207e3d1a 6887 PL_last_lop = PL_last_uni = Nullch;
378cc40b 6888 }
4e553d73 6889
02aa26ce
NT
6890 /* at this point, we have successfully read the delimited string */
6891
09bef843
SB
6892 if (keep_delims)
6893 sv_catpvn(sv, s, 1);
89491803 6894 if (has_utf8)
b1c7b182 6895 SvUTF8_on(sv);
57843af0 6896 PL_multi_end = CopLINE(PL_curcop);
79072805 6897 s++;
02aa26ce
NT
6898
6899 /* if we allocated too much space, give some back */
93a17b20
LW
6900 if (SvCUR(sv) + 5 < SvLEN(sv)) {
6901 SvLEN_set(sv, SvCUR(sv) + 1);
463ee0b2 6902 Renew(SvPVX(sv), SvLEN(sv), char);
79072805 6903 }
02aa26ce
NT
6904
6905 /* decide whether this is the first or second quoted string we've read
6906 for this op
6907 */
4e553d73 6908
3280af22
NIS
6909 if (PL_lex_stuff)
6910 PL_lex_repl = sv;
79072805 6911 else
3280af22 6912 PL_lex_stuff = sv;
378cc40b
LW
6913 return s;
6914}
6915
02aa26ce
NT
6916/*
6917 scan_num
6918 takes: pointer to position in buffer
6919 returns: pointer to new position in buffer
6920 side-effects: builds ops for the constant in yylval.op
6921
6922 Read a number in any of the formats that Perl accepts:
6923
7fd134d9
JH
6924 \d(_?\d)*(\.(\d(_?\d)*)?)?[Ee][\+\-]?(\d(_?\d)*) 12 12.34 12.
6925 \.\d(_?\d)*[Ee][\+\-]?(\d(_?\d)*) .34
24138b49
JH
6926 0b[01](_?[01])*
6927 0[0-7](_?[0-7])*
6928 0x[0-9A-Fa-f](_?[0-9A-Fa-f])*
02aa26ce 6929
3280af22 6930 Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
02aa26ce
NT
6931 thing it reads.
6932
6933 If it reads a number without a decimal point or an exponent, it will
6934 try converting the number to an integer and see if it can do so
6935 without loss of precision.
6936*/
4e553d73 6937
378cc40b 6938char *
b73d6f50 6939Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
378cc40b 6940{
02aa26ce
NT
6941 register char *s = start; /* current position in buffer */
6942 register char *d; /* destination in temp buffer */
6943 register char *e; /* end of temp buffer */
86554af2 6944 NV nv; /* number read, as a double */
a7cb1f99 6945 SV *sv = Nullsv; /* place to put the converted number */
a86a20aa 6946 bool floatit; /* boolean: int or float? */
02aa26ce 6947 char *lastub = 0; /* position of last underbar */
fc36a67e 6948 static char number_too_long[] = "Number too long";
378cc40b 6949
02aa26ce
NT
6950 /* We use the first character to decide what type of number this is */
6951
378cc40b 6952 switch (*s) {
79072805 6953 default:
cea2e8a9 6954 Perl_croak(aTHX_ "panic: scan_num");
4e553d73 6955
02aa26ce 6956 /* if it starts with a 0, it could be an octal number, a decimal in
a7cb1f99 6957 0.13 disguise, or a hexadecimal number, or a binary number. */
378cc40b
LW
6958 case '0':
6959 {
02aa26ce
NT
6960 /* variables:
6961 u holds the "number so far"
4f19785b
WSI
6962 shift the power of 2 of the base
6963 (hex == 4, octal == 3, binary == 1)
02aa26ce
NT
6964 overflowed was the number more than we can hold?
6965
6966 Shift is used when we add a digit. It also serves as an "are
4f19785b
WSI
6967 we in octal/hex/binary?" indicator to disallow hex characters
6968 when in octal mode.
02aa26ce 6969 */
9e24b6e2
JH
6970 NV n = 0.0;
6971 UV u = 0;
79072805 6972 I32 shift;
9e24b6e2
JH
6973 bool overflowed = FALSE;
6974 static NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 };
6975 static char* bases[5] = { "", "binary", "", "octal",
6976 "hexadecimal" };
6977 static char* Bases[5] = { "", "Binary", "", "Octal",
6978 "Hexadecimal" };
6979 static char *maxima[5] = { "",
6980 "0b11111111111111111111111111111111",
6981 "",
893fe2c2 6982 "037777777777",
9e24b6e2
JH
6983 "0xffffffff" };
6984 char *base, *Base, *max;
378cc40b 6985
02aa26ce 6986 /* check for hex */
378cc40b
LW
6987 if (s[1] == 'x') {
6988 shift = 4;
6989 s += 2;
4f19785b
WSI
6990 } else if (s[1] == 'b') {
6991 shift = 1;
6992 s += 2;
378cc40b 6993 }
02aa26ce 6994 /* check for a decimal in disguise */
b78218b7 6995 else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E')
378cc40b 6996 goto decimal;
02aa26ce 6997 /* so it must be octal */
928753ea 6998 else {
378cc40b 6999 shift = 3;
928753ea
JH
7000 s++;
7001 }
7002
7003 if (*s == '_') {
7004 if (ckWARN(WARN_SYNTAX))
7005 Perl_warner(aTHX_ WARN_SYNTAX,
7006 "Misplaced _ in number");
7007 lastub = s++;
7008 }
9e24b6e2
JH
7009
7010 base = bases[shift];
7011 Base = Bases[shift];
7012 max = maxima[shift];
02aa26ce 7013
4f19785b 7014 /* read the rest of the number */
378cc40b 7015 for (;;) {
9e24b6e2 7016 /* x is used in the overflow test,
893fe2c2 7017 b is the digit we're adding on. */
9e24b6e2 7018 UV x, b;
55497cff 7019
378cc40b 7020 switch (*s) {
02aa26ce
NT
7021
7022 /* if we don't mention it, we're done */
378cc40b
LW
7023 default:
7024 goto out;
02aa26ce 7025
928753ea 7026 /* _ are ignored -- but warned about if consecutive */
de3bb511 7027 case '_':
928753ea
JH
7028 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7029 Perl_warner(aTHX_ WARN_SYNTAX,
7030 "Misplaced _ in number");
7031 lastub = s++;
de3bb511 7032 break;
02aa26ce
NT
7033
7034 /* 8 and 9 are not octal */
378cc40b 7035 case '8': case '9':
4f19785b 7036 if (shift == 3)
cea2e8a9 7037 yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s));
378cc40b 7038 /* FALL THROUGH */
02aa26ce
NT
7039
7040 /* octal digits */
4f19785b 7041 case '2': case '3': case '4':
378cc40b 7042 case '5': case '6': case '7':
4f19785b 7043 if (shift == 1)
cea2e8a9 7044 yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s));
4f19785b
WSI
7045 /* FALL THROUGH */
7046
7047 case '0': case '1':
02aa26ce 7048 b = *s++ & 15; /* ASCII digit -> value of digit */
55497cff 7049 goto digit;
02aa26ce
NT
7050
7051 /* hex digits */
378cc40b
LW
7052 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
7053 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
02aa26ce 7054 /* make sure they said 0x */
378cc40b
LW
7055 if (shift != 4)
7056 goto out;
55497cff 7057 b = (*s++ & 7) + 9;
02aa26ce
NT
7058
7059 /* Prepare to put the digit we have onto the end
7060 of the number so far. We check for overflows.
7061 */
7062
55497cff 7063 digit:
9e24b6e2
JH
7064 if (!overflowed) {
7065 x = u << shift; /* make room for the digit */
7066
7067 if ((x >> shift) != u
7068 && !(PL_hints & HINT_NEW_BINARY)) {
9e24b6e2
JH
7069 overflowed = TRUE;
7070 n = (NV) u;
767a6a26
PM
7071 if (ckWARN_d(WARN_OVERFLOW))
7072 Perl_warner(aTHX_ WARN_OVERFLOW,
9e24b6e2
JH
7073 "Integer overflow in %s number",
7074 base);
7075 } else
7076 u = x | b; /* add the digit to the end */
7077 }
7078 if (overflowed) {
7079 n *= nvshift[shift];
7080 /* If an NV has not enough bits in its
7081 * mantissa to represent an UV this summing of
7082 * small low-order numbers is a waste of time
7083 * (because the NV cannot preserve the
7084 * low-order bits anyway): we could just
7085 * remember when did we overflow and in the
7086 * end just multiply n by the right
7087 * amount. */
7088 n += (NV) b;
55497cff 7089 }
378cc40b
LW
7090 break;
7091 }
7092 }
02aa26ce
NT
7093
7094 /* if we get here, we had success: make a scalar value from
7095 the number.
7096 */
378cc40b 7097 out:
928753ea
JH
7098
7099 /* final misplaced underbar check */
7100 if (s[-1] == '_') {
7101 if (ckWARN(WARN_SYNTAX))
7102 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
7103 }
7104
79072805 7105 sv = NEWSV(92,0);
9e24b6e2 7106 if (overflowed) {
767a6a26
PM
7107 if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
7108 Perl_warner(aTHX_ WARN_PORTABLE,
9e24b6e2
JH
7109 "%s number > %s non-portable",
7110 Base, max);
7111 sv_setnv(sv, n);
7112 }
7113 else {
15041a67 7114#if UVSIZE > 4
767a6a26
PM
7115 if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
7116 Perl_warner(aTHX_ WARN_PORTABLE,
9e24b6e2
JH
7117 "%s number > %s non-portable",
7118 Base, max);
2cc4c2dc 7119#endif
9e24b6e2
JH
7120 sv_setuv(sv, u);
7121 }
2cc4c2dc 7122 if (PL_hints & HINT_NEW_BINARY)
b3ac6de7 7123 sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
378cc40b
LW
7124 }
7125 break;
02aa26ce
NT
7126
7127 /*
7128 handle decimal numbers.
7129 we're also sent here when we read a 0 as the first digit
7130 */
378cc40b
LW
7131 case '1': case '2': case '3': case '4': case '5':
7132 case '6': case '7': case '8': case '9': case '.':
7133 decimal:
3280af22
NIS
7134 d = PL_tokenbuf;
7135 e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
79072805 7136 floatit = FALSE;
02aa26ce
NT
7137
7138 /* read next group of digits and _ and copy into d */
de3bb511 7139 while (isDIGIT(*s) || *s == '_') {
4e553d73 7140 /* skip underscores, checking for misplaced ones
02aa26ce
NT
7141 if -w is on
7142 */
93a17b20 7143 if (*s == '_') {
928753ea
JH
7144 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7145 Perl_warner(aTHX_ WARN_SYNTAX,
7146 "Misplaced _ in number");
7147 lastub = s++;
93a17b20 7148 }
fc36a67e 7149 else {
02aa26ce 7150 /* check for end of fixed-length buffer */
fc36a67e 7151 if (d >= e)
cea2e8a9 7152 Perl_croak(aTHX_ number_too_long);
02aa26ce 7153 /* if we're ok, copy the character */
378cc40b 7154 *d++ = *s++;
fc36a67e 7155 }
378cc40b 7156 }
02aa26ce
NT
7157
7158 /* final misplaced underbar check */
928753ea 7159 if (lastub && s == lastub + 1) {
d008e5eb 7160 if (ckWARN(WARN_SYNTAX))
cea2e8a9 7161 Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
d008e5eb 7162 }
02aa26ce
NT
7163
7164 /* read a decimal portion if there is one. avoid
7165 3..5 being interpreted as the number 3. followed
7166 by .5
7167 */
2f3197b3 7168 if (*s == '.' && s[1] != '.') {
79072805 7169 floatit = TRUE;
378cc40b 7170 *d++ = *s++;
02aa26ce 7171
928753ea
JH
7172 if (*s == '_') {
7173 if (ckWARN(WARN_SYNTAX))
7174 Perl_warner(aTHX_ WARN_SYNTAX,
7175 "Misplaced _ in number");
7176 lastub = s;
7177 }
7178
7179 /* copy, ignoring underbars, until we run out of digits.
02aa26ce 7180 */
fc36a67e 7181 for (; isDIGIT(*s) || *s == '_'; s++) {
02aa26ce 7182 /* fixed length buffer check */
fc36a67e 7183 if (d >= e)
cea2e8a9 7184 Perl_croak(aTHX_ number_too_long);
928753ea
JH
7185 if (*s == '_') {
7186 if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
7187 Perl_warner(aTHX_ WARN_SYNTAX,
7188 "Misplaced _ in number");
7189 lastub = s;
7190 }
7191 else
fc36a67e 7192 *d++ = *s;
378cc40b 7193 }
928753ea
JH
7194 /* fractional part ending in underbar? */
7195 if (s[-1] == '_') {
7196 if (ckWARN(WARN_SYNTAX))
7197 Perl_warner(aTHX_ WARN_SYNTAX,
7198 "Misplaced _ in number");
7199 }
dd629d5b
GS
7200 if (*s == '.' && isDIGIT(s[1])) {
7201 /* oops, it's really a v-string, but without the "v" */
7202 s = start - 1;
7203 goto vstring;
7204 }
378cc40b 7205 }
02aa26ce
NT
7206
7207 /* read exponent part, if present */
7fd134d9 7208 if (*s && strchr("eE",*s) && strchr("+-0123456789_", s[1])) {
79072805
LW
7209 floatit = TRUE;
7210 s++;
02aa26ce
NT
7211
7212 /* regardless of whether user said 3E5 or 3e5, use lower 'e' */
79072805 7213 *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
02aa26ce 7214
7fd134d9
JH
7215 /* stray preinitial _ */
7216 if (*s == '_') {
7217 if (ckWARN(WARN_SYNTAX))
7218 Perl_warner(aTHX_ WARN_SYNTAX,
7219 "Misplaced _ in number");
7220 lastub = s++;
7221 }
7222
02aa26ce 7223 /* allow positive or negative exponent */
378cc40b
LW
7224 if (*s == '+' || *s == '-')
7225 *d++ = *s++;
02aa26ce 7226
7fd134d9
JH
7227 /* stray initial _ */
7228 if (*s == '_') {
7229 if (ckWARN(WARN_SYNTAX))
7230 Perl_warner(aTHX_ WARN_SYNTAX,
7231 "Misplaced _ in number");
7232 lastub = s++;
7233 }
7234
7fd134d9
JH
7235 /* read digits of exponent */
7236 while (isDIGIT(*s) || *s == '_') {
7237 if (isDIGIT(*s)) {
7238 if (d >= e)
7239 Perl_croak(aTHX_ number_too_long);
b3b48e3e 7240 *d++ = *s++;
7fd134d9
JH
7241 }
7242 else {
7243 if (ckWARN(WARN_SYNTAX) &&
7244 ((lastub && s == lastub + 1) ||
b3b48e3e 7245 (!isDIGIT(s[1]) && s[1] != '_')))
7fd134d9
JH
7246 Perl_warner(aTHX_ WARN_SYNTAX,
7247 "Misplaced _ in number");
b3b48e3e 7248 lastub = s++;
7fd134d9 7249 }
7fd134d9 7250 }
378cc40b 7251 }
02aa26ce 7252
02aa26ce
NT
7253
7254 /* make an sv from the string */
79072805 7255 sv = NEWSV(92,0);
097ee67d 7256
0b7fceb9 7257 /*
58bb9ec3
NC
7258 We try to do an integer conversion first if no characters
7259 indicating "float" have been found.
0b7fceb9
MU
7260 */
7261
7262 if (!floatit) {
58bb9ec3
NC
7263 UV uv;
7264 int flags = grok_number (PL_tokenbuf, d - PL_tokenbuf, &uv);
7265
7266 if (flags == IS_NUMBER_IN_UV) {
7267 if (uv <= IV_MAX)
86554af2 7268 sv_setiv(sv, uv); /* Prefer IVs over UVs. */
58bb9ec3 7269 else
c239479b 7270 sv_setuv(sv, uv);
58bb9ec3
NC
7271 } else if (flags == (IS_NUMBER_IN_UV | IS_NUMBER_NEG)) {
7272 if (uv <= (UV) IV_MIN)
7273 sv_setiv(sv, -(IV)uv);
7274 else
7275 floatit = TRUE;
7276 } else
7277 floatit = TRUE;
7278 }
0b7fceb9 7279 if (floatit) {
58bb9ec3
NC
7280 /* terminate the string */
7281 *d = '\0';
86554af2
JH
7282 nv = Atof(PL_tokenbuf);
7283 sv_setnv(sv, nv);
7284 }
86554af2 7285
b8403495
JH
7286 if ( floatit ? (PL_hints & HINT_NEW_FLOAT) :
7287 (PL_hints & HINT_NEW_INTEGER) )
4e553d73 7288 sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
b8403495
JH
7289 (floatit ? "float" : "integer"),
7290 sv, Nullsv, NULL);
378cc40b 7291 break;
0b7fceb9 7292
e312add1 7293 /* if it starts with a v, it could be a v-string */
a7cb1f99 7294 case 'v':
dd629d5b 7295vstring:
a7cb1f99 7296 {
a7cb1f99
GS
7297 char *pos = s;
7298 pos++;
dd629d5b 7299 while (isDIGIT(*pos) || *pos == '_')
a7cb1f99 7300 pos++;
e526c9e6 7301 if (!isALPHA(*pos)) {
c4d5f83a 7302 UV rev;
ad391ad9 7303 U8 tmpbuf[UTF8_MAXLEN+1];
a7cb1f99 7304 U8 *tmpend;
a7cb1f99
GS
7305 s++; /* get past 'v' */
7306
7307 sv = NEWSV(92,5);
a7cb1f99
GS
7308 sv_setpvn(sv, "", 0);
7309
e526c9e6 7310 for (;;) {
3cb0bbe5
GS
7311 if (*s == '0' && isDIGIT(s[1]))
7312 yyerror("Octal number in vector unsupported");
dd629d5b
GS
7313 rev = 0;
7314 {
7315 /* this is atoi() that tolerates underscores */
7316 char *end = pos;
7317 UV mult = 1;
7318 while (--end >= s) {
7319 UV orev;
7320 if (*end == '_')
7321 continue;
7322 orev = rev;
7323 rev += (*end - '0') * mult;
7324 mult *= 10;
7325 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
7326 Perl_warner(aTHX_ WARN_OVERFLOW,
7327 "Integer overflow in decimal number");
7328 }
7329 }
9041c2e3
NIS
7330 /* Append native character for the rev point */
7331 tmpend = uvchr_to_utf8(tmpbuf, rev);
e526c9e6 7332 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
c4d5f83a
NIS
7333 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
7334 SvUTF8_on(sv);
e526c9e6
GS
7335 if (*pos == '.' && isDIGIT(pos[1]))
7336 s = ++pos;
3818b22b 7337 else {
e526c9e6
GS
7338 s = pos;
7339 break;
3818b22b 7340 }
dd629d5b 7341 while (isDIGIT(*pos) || *pos == '_')
e526c9e6
GS
7342 pos++;
7343 }
a7cb1f99 7344 SvPOK_on(sv);
a7cb1f99 7345 SvREADONLY_on(sv);
a7cb1f99
GS
7346 }
7347 }
7348 break;
79072805 7349 }
a687059c 7350
02aa26ce
NT
7351 /* make the op for the constant and return */
7352
a86a20aa 7353 if (sv)
b73d6f50 7354 lvalp->opval = newSVOP(OP_CONST, 0, sv);
a7cb1f99 7355 else
b73d6f50 7356 lvalp->opval = Nullop;
a687059c 7357
378cc40b
LW
7358 return s;
7359}
7360
76e3520e 7361STATIC char *
cea2e8a9 7362S_scan_formline(pTHX_ register char *s)
378cc40b 7363{
79072805 7364 register char *eol;
378cc40b 7365 register char *t;
79cb57f6 7366 SV *stuff = newSVpvn("",0);
79072805 7367 bool needargs = FALSE;
378cc40b 7368
79072805 7369 while (!needargs) {
c2e66d9e 7370 if (*s == '.' || *s == /*{*/'}') {
79072805 7371 /*SUPPRESS 530*/
51882d45 7372#ifdef PERL_STRICT_CR
bf4acbe4 7373 for (t = s+1;SPACE_OR_TAB(*t); t++) ;
51882d45 7374#else
bf4acbe4 7375 for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ;
51882d45 7376#endif
6a65c6a0 7377 if (*t == '\n' || t == PL_bufend)
79072805
LW
7378 break;
7379 }
3280af22 7380 if (PL_in_eval && !PL_rsfp) {
93a17b20 7381 eol = strchr(s,'\n');
0f85fab0 7382 if (!eol++)
3280af22 7383 eol = PL_bufend;
0f85fab0
LW
7384 }
7385 else
3280af22 7386 eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
79072805 7387 if (*s != '#') {
a0d0e21e
LW
7388 for (t = s; t < eol; t++) {
7389 if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
7390 needargs = FALSE;
7391 goto enough; /* ~~ must be first line in formline */
378cc40b 7392 }
a0d0e21e
LW
7393 if (*t == '@' || *t == '^')
7394 needargs = TRUE;
378cc40b 7395 }
7121b347
MG
7396 if (eol > s) {
7397 sv_catpvn(stuff, s, eol-s);
2dc4c65b 7398#ifndef PERL_STRICT_CR
7121b347
MG
7399 if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') {
7400 char *end = SvPVX(stuff) + SvCUR(stuff);
7401 end[-2] = '\n';
7402 end[-1] = '\0';
7403 SvCUR(stuff)--;
7404 }
2dc4c65b 7405#endif
7121b347
MG
7406 }
7407 else
7408 break;
79072805
LW
7409 }
7410 s = eol;
3280af22
NIS
7411 if (PL_rsfp) {
7412 s = filter_gets(PL_linestr, PL_rsfp, 0);
7413 PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
7414 PL_bufend = PL_bufptr + SvCUR(PL_linestr);
207e3d1a 7415 PL_last_lop = PL_last_uni = Nullch;
79072805 7416 if (!s) {
3280af22 7417 s = PL_bufptr;
79072805 7418 yyerror("Format not terminated");
378cc40b
LW
7419 break;
7420 }
378cc40b 7421 }
463ee0b2 7422 incline(s);
79072805 7423 }
a0d0e21e
LW
7424 enough:
7425 if (SvCUR(stuff)) {
3280af22 7426 PL_expect = XTERM;
79072805 7427 if (needargs) {
3280af22
NIS
7428 PL_lex_state = LEX_NORMAL;
7429 PL_nextval[PL_nexttoke].ival = 0;
79072805
LW
7430 force_next(',');
7431 }
a0d0e21e 7432 else
3280af22
NIS
7433 PL_lex_state = LEX_FORMLINE;
7434 PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
79072805 7435 force_next(THING);
3280af22 7436 PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
79072805 7437 force_next(LSTOP);
378cc40b 7438 }
79072805 7439 else {
8990e307 7440 SvREFCNT_dec(stuff);
3280af22
NIS
7441 PL_lex_formbrack = 0;
7442 PL_bufptr = s;
79072805
LW
7443 }
7444 return s;
378cc40b 7445}
a687059c 7446
76e3520e 7447STATIC void
cea2e8a9 7448S_set_csh(pTHX)
a687059c 7449{
ae986130 7450#ifdef CSH
3280af22
NIS
7451 if (!PL_cshlen)
7452 PL_cshlen = strlen(PL_cshname);
ae986130 7453#endif
a687059c 7454}
463ee0b2 7455
ba6d6ac9 7456I32
864dbfa3 7457Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
8990e307 7458{
3280af22
NIS
7459 I32 oldsavestack_ix = PL_savestack_ix;
7460 CV* outsidecv = PL_compcv;
748a9306 7461 AV* comppadlist;
8990e307 7462
3280af22
NIS
7463 if (PL_compcv) {
7464 assert(SvTYPE(PL_compcv) == SVt_PVCV);
e9a444f0 7465 }
7766f137 7466 SAVEI32(PL_subline);
3280af22
NIS
7467 save_item(PL_subname);
7468 SAVEI32(PL_padix);
354992b1 7469 SAVECOMPPAD();
3280af22
NIS
7470 SAVESPTR(PL_comppad_name);
7471 SAVESPTR(PL_compcv);
7472 SAVEI32(PL_comppad_name_fill);
7473 SAVEI32(PL_min_intro_pending);
7474 SAVEI32(PL_max_intro_pending);
7475 SAVEI32(PL_pad_reset_pending);
7476
7477 PL_compcv = (CV*)NEWSV(1104,0);
7478 sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
7479 CvFLAGS(PL_compcv) |= flags;
7480
7481 PL_comppad = newAV();
7482 av_push(PL_comppad, Nullsv);
7483 PL_curpad = AvARRAY(PL_comppad);
7484 PL_comppad_name = newAV();
7485 PL_comppad_name_fill = 0;
7486 PL_min_intro_pending = 0;
7487 PL_padix = 0;
57843af0 7488 PL_subline = CopLINE(PL_curcop);
4d1ff10f 7489#ifdef USE_5005THREADS
79cb57f6 7490 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
7491 PL_curpad[0] = (SV*)newAV();
7492 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
4d1ff10f 7493#endif /* USE_5005THREADS */
748a9306
LW
7494
7495 comppadlist = newAV();
7496 AvREAL_off(comppadlist);
3280af22
NIS
7497 av_store(comppadlist, 0, (SV*)PL_comppad_name);
7498 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 7499
3280af22
NIS
7500 CvPADLIST(PL_compcv) = comppadlist;
7501 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
4d1ff10f 7502#ifdef USE_5005THREADS
533c011a
NIS
7503 CvOWNER(PL_compcv) = 0;
7504 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
7505 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 7506#endif /* USE_5005THREADS */
748a9306 7507
8990e307
LW
7508 return oldsavestack_ix;
7509}
7510
084592ab
CN
7511#ifdef __SC__
7512#pragma segment Perl_yylex
7513#endif
8990e307 7514int
864dbfa3 7515Perl_yywarn(pTHX_ char *s)
8990e307 7516{
faef0170 7517 PL_in_eval |= EVAL_WARNONLY;
748a9306 7518 yyerror(s);
faef0170 7519 PL_in_eval &= ~EVAL_WARNONLY;
748a9306 7520 return 0;
8990e307
LW
7521}
7522
7523int
864dbfa3 7524Perl_yyerror(pTHX_ char *s)
463ee0b2 7525{
68dc0745 7526 char *where = NULL;
7527 char *context = NULL;
7528 int contlen = -1;
46fc3d4c 7529 SV *msg;
463ee0b2 7530
3280af22 7531 if (!yychar || (yychar == ';' && !PL_rsfp))
54310121 7532 where = "at EOF";
3280af22
NIS
7533 else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
7534 PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
7535 while (isSPACE(*PL_oldoldbufptr))
7536 PL_oldoldbufptr++;
7537 context = PL_oldoldbufptr;
7538 contlen = PL_bufptr - PL_oldoldbufptr;
463ee0b2 7539 }
3280af22
NIS
7540 else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
7541 PL_oldbufptr != PL_bufptr) {
7542 while (isSPACE(*PL_oldbufptr))
7543 PL_oldbufptr++;
7544 context = PL_oldbufptr;
7545 contlen = PL_bufptr - PL_oldbufptr;
463ee0b2
LW
7546 }
7547 else if (yychar > 255)
68dc0745 7548 where = "next token ???";
cdfb297e
GS
7549#ifdef USE_PURE_BISON
7550/* GNU Bison sets the value -2 */
7551 else if (yychar == -2) {
7552#else
463ee0b2 7553 else if ((yychar & 127) == 127) {
cdfb297e 7554#endif
3280af22
NIS
7555 if (PL_lex_state == LEX_NORMAL ||
7556 (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
68dc0745 7557 where = "at end of line";
3280af22 7558 else if (PL_lex_inpat)
68dc0745 7559 where = "within pattern";
463ee0b2 7560 else
68dc0745 7561 where = "within string";
463ee0b2 7562 }
46fc3d4c 7563 else {
79cb57f6 7564 SV *where_sv = sv_2mortal(newSVpvn("next char ", 10));
46fc3d4c 7565 if (yychar < 32)
cea2e8a9 7566 Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar));
46fc3d4c 7567 else if (isPRINT_LC(yychar))
cea2e8a9 7568 Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar);
463ee0b2 7569 else
cea2e8a9 7570 Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255);
46fc3d4c 7571 where = SvPVX(where_sv);
463ee0b2 7572 }
46fc3d4c 7573 msg = sv_2mortal(newSVpv(s, 0));
ed094faf
GS
7574 Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ",
7575 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
68dc0745 7576 if (context)
cea2e8a9 7577 Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context);
463ee0b2 7578 else
cea2e8a9 7579 Perl_sv_catpvf(aTHX_ msg, "%s\n", where);
57843af0 7580 if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) {
cf2093f6 7581 Perl_sv_catpvf(aTHX_ msg,
57def98f 7582 " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n",
cf2093f6 7583 (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start);
3280af22 7584 PL_multi_end = 0;
a0d0e21e 7585 }
faef0170 7586 if (PL_in_eval & EVAL_WARNONLY)
894356b3 7587 Perl_warn(aTHX_ "%"SVf, msg);
463ee0b2 7588 else
5a844595 7589 qerror(msg);
c7d6bfb2
GS
7590 if (PL_error_count >= 10) {
7591 if (PL_in_eval && SvCUR(ERRSV))
d2560b70 7592 Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n",
c7d6bfb2
GS
7593 ERRSV, CopFILE(PL_curcop));
7594 else
7595 Perl_croak(aTHX_ "%s has too many errors.\n",
7596 CopFILE(PL_curcop));
7597 }
3280af22
NIS
7598 PL_in_my = 0;
7599 PL_in_my_stash = Nullhv;
463ee0b2
LW
7600 return 0;
7601}
084592ab
CN
7602#ifdef __SC__
7603#pragma segment Main
7604#endif
4e35701f 7605
b250498f 7606STATIC char*
3ae08724 7607S_swallow_bom(pTHX_ U8 *s)
01ec43d0 7608{
b250498f
GS
7609 STRLEN slen;
7610 slen = SvCUR(PL_linestr);
7611 switch (*s) {
4e553d73
NIS
7612 case 0xFF:
7613 if (s[1] == 0xFE) {
01ec43d0 7614 /* UTF-16 little-endian */
3ae08724 7615 if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */
01ec43d0
GS
7616 Perl_croak(aTHX_ "Unsupported script encoding");
7617#ifndef PERL_NO_UTF16_FILTER
dea0fc0b 7618 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-LE script encoding\n"));
3ae08724 7619 s += 2;
dea0fc0b
JH
7620 if (PL_bufend > (char*)s) {
7621 U8 *news;
7622 I32 newlen;
7623
7624 filter_add(utf16rev_textfilter, NULL);
7625 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
f72f5f89
JH
7626 PL_bufend = (char*)utf16_to_utf8_reversed(s, news,
7627 PL_bufend - (char*)s - 1,
dea0fc0b
JH
7628 &newlen);
7629 Copy(news, s, newlen, U8);
7630 SvCUR_set(PL_linestr, newlen);
7631 PL_bufend = SvPVX(PL_linestr) + newlen;
7632 news[newlen++] = '\0';
7633 Safefree(news);
7634 }
b250498f 7635#else
01ec43d0 7636 Perl_croak(aTHX_ "Unsupported script encoding");
b250498f 7637#endif
01ec43d0
GS
7638 }
7639 break;
78ae23f5 7640 case 0xFE:
3ae08724 7641 if (s[1] == 0xFF) { /* UTF-16 big-endian */
01ec43d0 7642#ifndef PERL_NO_UTF16_FILTER
dea0fc0b
JH
7643 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding\n"));
7644 s += 2;
7645 if (PL_bufend > (char *)s) {
7646 U8 *news;
7647 I32 newlen;
7648
7649 filter_add(utf16_textfilter, NULL);
7650 New(898, news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8);
7651 PL_bufend = (char*)utf16_to_utf8(s, news,
7652 PL_bufend - (char*)s,
7653 &newlen);
7654 Copy(news, s, newlen, U8);
7655 SvCUR_set(PL_linestr, newlen);
7656 PL_bufend = SvPVX(PL_linestr) + newlen;
7657 news[newlen++] = '\0';
7658 Safefree(news);
7659 }
b250498f 7660#else
01ec43d0 7661 Perl_croak(aTHX_ "Unsupported script encoding");
b250498f 7662#endif
01ec43d0
GS
7663 }
7664 break;
3ae08724
GS
7665 case 0xEF:
7666 if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) {
dea0fc0b 7667 DEBUG_p(PerlIO_printf(Perl_debug_log, "UTF-8 script encoding\n"));
01ec43d0
GS
7668 s += 3; /* UTF-8 */
7669 }
7670 break;
7671 case 0:
7672 if (slen > 3 && s[1] == 0 && /* UTF-32 big-endian */
3ae08724 7673 s[2] == 0xFE && s[3] == 0xFF)
01ec43d0
GS
7674 {
7675 Perl_croak(aTHX_ "Unsupported script encoding");
7676 }
7677 }
b8f84bb2 7678 return (char*)s;
b250498f 7679}
4755096e 7680
4755096e
GS
7681/*
7682 * restore_rsfp
7683 * Restore a source filter.
7684 */
7685
7686static void
acfe0abc 7687restore_rsfp(pTHX_ void *f)
4755096e
GS
7688{
7689 PerlIO *fp = (PerlIO*)f;
7690
7691 if (PL_rsfp == PerlIO_stdin())
7692 PerlIO_clearerr(PL_rsfp);
7693 else if (PL_rsfp && (PL_rsfp != fp))
7694 PerlIO_close(PL_rsfp);
7695 PL_rsfp = fp;
7696}
6e3aabd6
GS
7697
7698#ifndef PERL_NO_UTF16_FILTER
7699static I32
acfe0abc 7700utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen)
6e3aabd6
GS
7701{
7702 I32 count = FILTER_READ(idx+1, sv, maxlen);
7703 if (count) {
7704 U8* tmps;
7705 U8* tend;
dea0fc0b 7706 I32 newlen;
6e3aabd6 7707 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
f72f5f89
JH
7708 if (!*SvPV_nolen(sv))
7709 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7710 return count;
4e553d73 7711
dea0fc0b 7712 tend = utf16_to_utf8((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
6e3aabd6
GS
7713 sv_usepvn(sv, (char*)tmps, tend - tmps);
7714 }
7715 return count;
7716}
7717
7718static I32
acfe0abc 7719utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen)
6e3aabd6
GS
7720{
7721 I32 count = FILTER_READ(idx+1, sv, maxlen);
7722 if (count) {
7723 U8* tmps;
7724 U8* tend;
dea0fc0b 7725 I32 newlen;
f72f5f89
JH
7726 if (!*SvPV_nolen(sv))
7727 /* Game over, but don't feed an odd-length string to utf16_to_utf8 */
7728 return count;
7729
6e3aabd6 7730 New(898, tmps, SvCUR(sv) * 3 / 2 + 1, U8);
dea0fc0b 7731 tend = utf16_to_utf8_reversed((U8*)SvPVX(sv), tmps, SvCUR(sv), &newlen);
6e3aabd6
GS
7732 sv_usepvn(sv, (char*)tmps, tend - tmps);
7733 }
7734 return count;
7735}
7736#endif