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Remove code specific to MacOS Classic from core tests
[perl5.git] / t / japh / abigail.t
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1#!./perl -w
2
3#
4# Tests derived from Japhs.
5#
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6# These test use obscure features of Perl, or surprising combinations
7# of features. The tests were added because in the past, they have
8# exposed several bugs in Perl.
9#
10# Some of these tests may actually (mis)use bugs or use undefined behaviour.
11# These tests are still useful - behavioural changes or bugfixes will be
12# noted, and a remark can be put in the documentation. (Don't forget to
13# disable the test!)
14#
15# Getting everything to run well on the myriad of platforms Perl runs on
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16# is unfortunately not a trivial task.
17#
18# WARNING: these tests are obfuscated. Do not get frustrated.
6553334e 19# Ask Abigail <abigail@abigail.be>, or use the Deparse or Concise
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20# modules (the former parses Perl to Perl, the latter shows the
21# op syntax tree) like this:
22# ./perl -Ilib -MO=Deparse foo.pl
23# ./perl -Ilib -MO=Concise foo.pl
5a6f1faa 24#
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25
26BEGIN {
27 if (ord("A") == 193) {
28 print "1..0 # Skip: EBCDIC\n"; # For now, until someone has time.
29 exit(0);
30 }
31 chdir 't' if -d 't';
32 @INC = '../lib';
33 require "./test.pl";
34 undef &skip;
35}
36
37#
38# ./test.pl does real evilness by jumping to a label.
39# This function copies the skip from ./test, omitting the goto.
40#
41sub skip {
42 my $why = shift;
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43 my $n = @_ ? shift : 1;
44 for (1..$n) {
51bdca1b 45 my $test = curr_test;
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46 print STDOUT "ok $test # skip: $why\n";
47 next_test;
48 }
49}
50
51
52#
53# ./test.pl doesn't give use 'notok', so we make it here.
54#
55sub notok {
56 my ($pass, $name, @mess) = @_;
57 _ok(!$pass, _where(), $name, @mess);
58}
59
60my $JaPH = "Just another Perl Hacker";
61my $JaPh = "Just another Perl hacker";
62my $JaPH_n = "Just another Perl Hacker\n";
63my $JaPh_n = "Just another Perl hacker\n";
64my $JaPH_s = "Just another Perl Hacker ";
65my $JaPh_s = "Just another Perl hacker ";
66my $JaPH_c = "Just another Perl Hacker,";
67my $JaPh_c = "Just another Perl hacker,";
68
69plan tests => 130;
70
71{
72 my $out = sprintf "Just another Perl Hacker";
73 is ($out, $JaPH);
74}
75
76
77{
78 my @primes = (2, 3, 7, 13, 53, 101, 557, 1429);
79 my @composites = (4, 10, 25, 32, 75, 143, 1333, 1728);
80
81 my %primeness = ((map {$_ => 1} @primes),
82 (map {$_ => 0} @composites));
83
84 while (my ($num, $is_prime) = each %primeness) {
85 my $comment = "$num is " . ($is_prime ? "prime." : "composite.");
86
87 my $sub = $is_prime ? "ok" : "notok";
88
89 &$sub (( 1 x $num) !~ /^1?$|^(11+?)\1+$/, $comment);
90 &$sub (( 0 x $num) !~ m 0^\0?$|^(\0\0+?)\1+$0, $comment);
91 &$sub (("m" x $num) !~ m m^\m?$|^(\m\m+?)\1+$mm, $comment);
92 }
93}
94
95
96{ # Some platforms use different quoting techniques.
97 # I do not have access to those platforms to test
98 # things out. So, we'll skip things....
99 if ($^O eq 'MSWin32' ||
100 $^O eq 'NetWare' ||
101 $^O eq 'VMS') {
51bdca1b 102 skip "Your platform quotes differently.", 3;
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103 last;
104 }
105
106 my $expected = $JaPH;
107 $expected =~ s/ /\n/g;
108 $expected .= "\n";
109 is (runperl (switches => [qw /'-weprint<<EOT;' -eJust -eanother
110 -ePerl -eHacker -eEOT/],
111 verbose => 0),
112 $expected, "Multiple -e switches");
113
114 is (runperl (switches => [q !'-wle$_=<<EOT;y/\n/ /;print;'!,
115 qw ! -eJust -eanother -ePerl -eHacker -eEOT!],
116 verbose => 0),
117 $JaPH . " \n", "Multiple -e switches");
118
119 is (runperl (switches => [qw !-wl!],
120 progs => [qw !print qq-@{[ qw+ Just
121 another Perl Hacker +]}-!],
122 verbose => 0),
123 $JaPH_n, "Multiple -e switches");
124}
125
126{
127 if ($^O eq 'MSWin32' ||
128 $^O eq 'NetWare' ||
129 $^O eq 'VMS') {
51bdca1b 130 skip "Your platform quotes differently.", 1;
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131 last;
132 }
133 is (runperl (switches => [qw /-sweprint --/,
134 "-_='Just another Perl Hacker'"],
135 nolib => 1,
136 verbose => 0),
137 $JaPH, 'setting $_ via -s');
138}
139
140{
141 my $datafile = "datatmp000";
142 1 while -f ++ $datafile;
dc459aad 143 END {unlink_all $datafile if $datafile}
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144
145 open MY_DATA, "> $datafile" or die "Failed to open $datafile: $!";
146 print MY_DATA << " --";
147 One
148 Two
149 Three
150 Four
151 Five
152 Six
153 --
154 close MY_DATA or die "Failed to close $datafile: $!\n";
155
156 my @progs;
157 my $key;
158 while (<DATA>) {
159 last if /^__END__$/;
160
161 if (/^#{7}(?:\s+(.*))?/) {
162 push @progs => {COMMENT => $1 || '',
163 CODE => '',
164 SKIP_OS => [],
165 ARGS => [],
166 SWITCHES => [],};
167 $key = 'CODE';
168 next;
169 }
170 elsif (/^(COMMENT|CODE|ARGS|SWITCHES|EXPECT|SKIP|SKIP_OS)
171 (?::\s+(.*))?$/sx) {
172 $key = $1;
173 $progs [-1] {$key} = '' unless exists $progs [-1] {$key};
174 next unless defined $2;
175 $_ = $2;
176 }
177 elsif (/^$/) {
178 next;
179 }
180
181 if (ref ($progs [-1] {$key})) {
182 push @{$progs [-1] {$key}} => $_;
183 }
184 else {
185 $progs [-1] {$key} .= $_;
186 }
187 }
188
189 foreach my $program (@progs) {
190 if (exists $program -> {SKIP}) {
191 chomp $program -> {SKIP};
51bdca1b 192 skip $program -> {SKIP}, 1;
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193 next;
194 }
195
760807ca 196 chomp @{$program -> {SKIP_OS}};
51bdca1b 197 if (@{$program -> {SKIP_OS}}) {
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198 if (grep {$^O eq $_} @{$program -> {SKIP_OS}}) {
199 skip "Your OS uses different quoting.", 1;
200 next;
201 }
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202 }
203
204 map {s/\$datafile/$datafile/} @{$program -> {ARGS}};
205 $program -> {EXPECT} = $JaPH unless exists $program -> {EXPECT};
206 $program -> {EXPECT} =~ s/\$JaPH_s\b/$JaPH_s/g;
207 $program -> {EXPECT} =~ s/\$JaPh_c\b/$JaPh_c/g;
208 $program -> {EXPECT} =~ s/\$JaPh\b/$JaPh/g;
209 chomp ($program -> {EXPECT}, @{$program -> {SWITCHES}},
210 @{$program -> {ARGS}});
211 fresh_perl_is ($program -> {CODE},
212 $program -> {EXPECT},
213 {switches => $program -> {SWITCHES},
214 args => $program -> {ARGS},
215 verbose => 0},
216 $program -> {COMMENT});
217 }
218}
219
220{
221 my $progfile = "progtmp000";
222 1 while -f ++ $progfile;
dc459aad 223 END {unlink_all $progfile if $progfile}
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224
225 my @programs = (<< ' --', << ' --');
4e508696 226#!./perl
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227BEGIN{$|=$SIG{__WARN__}=sub{$_=$_[0];y-_- -;print/(.)"$/;seek _,-open(_
228,"+<$0"),2;truncate _,tell _;close _;exec$0}}//rekcaH_lreP_rehtona_tsuJ
229 --
4e508696 230#!./perl
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231BEGIN{$SIG{__WARN__}=sub{$_=pop;y-_- -;print/".*(.)"/;
232truncate$0,-1+-s$0;exec$0;}}//rekcaH_lreP_rehtona_tsuJ
233 --
234 chomp @programs;
235
0d37d453 236 if ($^O eq 'VMS' or $^O eq 'MSWin32') {
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237 # VMS needs extensions for files to be executable,
238 # but the Japhs above rely on $0 being exactly the
239 # filename of the program.
0d37d453 240 skip $^O, 2 * @programs;
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241 last
242 }
243
244 use Config;
245 unless (defined $Config {useperlio}) {
246 skip "Uuseperlio", 2 * @programs;
247 last
248 }
249
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250 my $i = 1;
251 foreach my $program (@programs) {
252 open my $fh => "> $progfile" or die "Failed to open $progfile: $!\n";
253 print $fh $program;
254 close $fh or die "Failed to close $progfile: $!\n";
255
256 chmod 0755 => $progfile or die "Failed to chmod $progfile: $!\n";
7b903762 257 my $command = "./$progfile 2>&1";
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258 if ( $^O eq 'qnx' ) {
259 skip "#!./perl not supported in QNX4";
260 skip "#!./perl not supported in QNX4";
261 } else {
262 my $output = `$command`;
6990bd83 263
760807ca 264 is ($output, $JaPH, "Self correcting code $i");
6990bd83 265
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266 $output = `$command`;
267 is ($output, "", "Self corrected code $i");
268 }
269 $i ++;
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270 }
271}
272
273__END__
274####### Funky loop 1.
275$_ = q ;4a75737420616e6f74686572205065726c204861636b65720as;;
276 for (s;s;s;s;s;s;s;s;s;s;s;s)
277 {s;(..)s?;qq qprint chr 0x$1 and \161 ssq;excess;}
278
279####### Funky loop 2.
280$_ = q *4a75737420616e6f74686572205065726c204861636b65720a*;
281for ($*=******;$**=******;$**=******) {$**=*******s*..*qq}
282print chr 0x$& and q
283qq}*excess********}
503d18c3 284SKIP: $* was removed.
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285
286####### Funky loop 3.
287$_ = q *4a75737420616e6f74686572205065726c204861636b65720a*;
288for ($*=******;$**=******;$**=******) {$**=*******s*..*qq}
289print chr 0x$& and q
290qq}*excess********}
503d18c3 291SKIP: $* was removed.
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292
293####### Funky loop 4.
294$_ = q ?4a75737420616e6f74686572205065726c204861636b65720as?;??;
295for (??;(??)x??;??)
296 {??;s;(..)s?;qq ?print chr 0x$1 and \161 ss?;excess;??}
297SKIP: Abuses a fixed bug.
298
299####### Funky loop 5.
300for (s??4a75737420616e6f74686572205065726c204861636b65720as?;??;??)
301 {s?(..)s\??qq \?print chr 0x$1 and q ss\??excess}
302SKIP: Abuses a fixed bug.
303
304####### Funky loop 6.
305$a = q 94a75737420616e6f74686572205065726c204861636b65720a9 and
306${qq$\x5F$} = q 97265646f9 and s g..g;
307qq e\x63\x68\x72\x20\x30\x78$&eggee;
308{eval if $a =~ s e..eqq qprint chr 0x$& and \x71\x20\x71\x71qeexcess}
309
310####### Roman Dates.
311@r=reverse(M=>(0)x99=>CM=>(0)x399=>D=>(0)x99=>CD=>(
3120)x299=>C=>(0)x9=>XC=>(0)x39=>L=>(0)x9=>XL=>(0)x29=>X=>IX=>0=>0=>0=>V=>IV=>0=>0
313=>I=>$==-2449231+gm_julian_day+time);do{until($=<$#r){$_.=$r[$#r];$=-=$#r}for(;
314!$r[--$#r];){}}while$=;$,="\x20";print+$_=>September=>MCMXCIII=>=>=>=>=>=>=>=>
315SWITCHES
316-MTimes::JulianDay
317-l
318SKIP: Times::JulianDay not part of the main distribution.
319
320####### Autoload 1.
321sub _'_{$_'_=~s/$a/$_/}map{$$_=$Z++}Y,a..z,A..X;*{($_::_=sprintf+q=%X==>"$A$Y".
322"$b$r$T$u")=~s~0~O~g;map+_::_,U=>T=>L=>$Z;$_::_}=*_;sub _{print+/.*::(.*)/s};;;
323*{chr($b*$e)}=*_'_;*__=*{chr(1<<$e)}; # Perl 5.6.0 broke this...
324_::_(r(e(k(c(a(H(__(l(r(e(P(__(r(e(h(t(o(n(a(__(t(us(J())))))))))))))))))))))))
325EXPECT: Just__another__Perl__Hacker
326
327####### Autoload 2.
328$"=$,;*{;qq{@{[(A..Z)[qq[0020191411140003]=~m[..]g]]}}}=*_=sub{print/::(.*)/};
329$\=$/;q<Just another Perl Hacker>->();
330
331####### Autoload 3.
332$"=$,;*{;qq{@{[(A..Z)[qq[0020191411140003]=~m[..]g]]}}}=*_;
333sub _ {push @_ => /::(.*)/s and goto &{ shift}}
334sub shift {print shift; @_ and goto &{+shift}}
335Hack ("Just", "Perl ", " ano", "er\n", "ther "); # YYYYMMDD
336
337####### Autoload 4.
338$, = " "; sub AUTOLOAD {($AUTOLOAD =~ /::(.*)/) [0];}
339print+Just (), another (), Perl (), Hacker ();
340
341####### Look ma! No letters!
342$@="\145\143\150\157\040\042\112\165\163\164\040\141\156\157\164".
343 "\150\145\162\040\120\145\162\154\040\110\141\143\153\145\162".
344 "\042\040\076\040\057\144\145\166\057\164\164\171";`$@`
345SKIP: Unix specific
346
347####### sprintf fun 1.
348sub f{sprintf$_[0],$_[1],$_[2]}print f('%c%s',74,f('%c%s',117,f('%c%s',115,f(
349'%c%s',116,f('%c%s',32,f('%c%s',97,f('%c%s',0x6e,f('%c%s',111,f('%c%s',116,f(
350'%c%s',104,f('%c%s',0x65,f('%c%s',114,f('%c%s',32,f('%c%s',80,f('%c%s',101,f(
351'%c%s',114,f('%c%s',0x6c,f('%c%s',32,f('%c%s',0x48,f('%c%s',97,f('%c%s',99,f(
352'%c%s',107,f('%c%s',101,f('%c%s',114,f('%c%s',10,)))))))))))))))))))))))))
353
354####### sprintf fun 2.
355sub f{sprintf'%c%s',$_[0],$_[1]}print f(74,f(117,f(115,f(116,f(32,f(97,
356f(110,f(111,f(116,f(104,f(0x65,f(114,f(32,f(80,f(101,f(114,f(0x6c,f(32,
357f(0x48,f(97,f(99,f(107,f(101,f(114,f(10,q ff)))))))))))))))))))))))))
358
359####### Hanoi.
360%0=map{local$_=$_;reverse+chop,$_}ABC,ACB,BAC,BCA,CAB,CBA;$_=3 .AC;1while+
361s/(\d+)((.)(.))/($0=$1-1)?"$0$3$0{$2}1$2$0$0{$2}$4":"$3 => $4\n"/xeg;print
362EXPECT
363A => C
364A => B
365C => B
366A => C
367B => A
368B => C
369A => C
370
371####### Funky -p 1
372}{$_=$.
373SWITCHES: -wlp
374ARGS: $datafile
375EXPECT: 6
376
377####### Funky -p 2
378}$_=$.;{
379SWITCHES: -wlp
380ARGS: $datafile
381EXPECT: 6
382
383####### Funky -p 3
384}{$_=$.}{
385SWITCHES: -wlp
386ARGS: $datafile
387EXPECT: 6
388
389####### Funky -p 4
390}{*_=*.}{
391SWITCHES: -wlp
392ARGS: $datafile
393EXPECT: 6
394
395####### Funky -p 5
396}for($.){print
397SWITCHES: -wln
398ARGS: $datafile
399EXPECT: 6
400
401####### Funky -p 6
402}{print$.
403SWITCHES: -wln
404ARGS: $datafile
405EXPECT: 6
406
407####### Funky -p 7
408}print$.;{
409SWITCHES: -wln
410ARGS: $datafile
411EXPECT: 6
412
413####### Abusing -M
4141
415SWITCHES
416-Mstrict='}); print "Just another Perl Hacker"; ({'
417-l
55082927 418SKIP: No longer works in 5.8.2 and beyond.
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419SKIP_OS: MSWin32
420SKIP_OS: NetWare
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421
422####### rand
423srand 123456;$-=rand$_--=>@[[$-,$_]=@[[$_,$-]for(reverse+1..(@[=split
424//=>"IGrACVGQ\x02GJCWVhP\x02PL\x02jNMP"));print+(map{$_^q^"^}@[),"\n"
425SKIP: Solaris specific.
426
427####### print and __PACKAGE__
428package Just_another_Perl_Hacker; sub print {($_=$_[0])=~ s/_/ /g;
429 print } sub __PACKAGE__ { &
430 print ( __PACKAGE__)} &
431 __PACKAGE__
432 ( )
433
434####### Decorations.
435* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
436/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
437% % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % %;
438BEGIN {% % = ($ _ = " " => print "Just another Perl Hacker\n")}
439
440####### Tie 1
441sub J::FETCH{Just }$_.='print+"@{[map';sub J::TIESCALAR{bless\my$J,J}
442sub A::FETCH{another}$_.='{tie my($x),$';sub A::TIESCALAR{bless\my$A,A}
443sub P::FETCH{Perl }$_.='_;$x}qw/J A P';sub P::TIESCALAR{bless\my$P,P}
444sub H::FETCH{Hacker }$_.=' H/]}\n"';eval;sub H::TIESCALAR{bless\my$H,H}
445
446####### Tie 2
447package Z;use overload'""'=>sub{$b++?Hacker:another};
448sub TIESCALAR{bless\my$y=>Z}sub FETCH{$a++?Perl:Just}
449$,=$";my$x=tie+my$y=>Z;print$y,$x,$y,$x,"\n";#Abigail
450EXPECT: $JaPH_s
451
452####### Tie 3
453sub A::TIESCALAR{bless\my$x=>A};package B;@q[0..3]=qw/Hacker Perl
454another Just/;use overload'""'=>sub{pop @q};sub A::FETCH{bless\my
455$y=>B}; tie my $shoe => qq 'A';print "$shoe $shoe $shoe $shoe\n";
456
457####### Tie 4
458sub A::TIESCALAR{bless\my$x=>'A'};package B;@q=qw/Hacker Perl
459another Just/;use overload'""',sub{pop @q};sub A::FETCH{bless
460\my $y=>B};tie my$shoe=>'A';print"$shoe $shoe $shoe $shoe\n";
461
462####### Tie 5
463tie $" => A; $, = " "; $\ = "\n"; @a = ("") x 2; print map {"@a"} 1 .. 4;
464sub A::TIESCALAR {bless \my $A => A} # Yet Another silly JAPH by Abigail
465sub A::FETCH {@q = qw /Just Another Perl Hacker/ unless @q; shift @q}
466SKIP: Pending a bug fix.
467
468####### Prototype fun 1
469sub camel (^#87=i@J&&&#]u'^^s]#'#={123{#}7890t[0.9]9@+*`"'***}A&&&}n2o}00}t324i;
470h[{e **###{r{+P={**{e^^^#'#i@{r'^=^{l+{#}H***i[0.9]&@a5`"':&^;&^,*&^$43##@@####;
471c}^^^&&&k}&&&}#=e*****[]}'r####'`=437*{#};::'1[0.9]2@43`"'*#==[[.{{],,,1278@#@);
472print+((($llama=prototype'camel')=~y|+{#}$=^*&[0-9]i@:;`"',.| |d)&&$llama."\n");
473SKIP: Abuses a fixed bug.
474
475####### Prototype fun 2
476print prototype sub "Just another Perl Hacker" {};
21d7e22a 477SKIP: Abuses a fixed bug.
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478
479####### Prototype fun 3
480sub _ "Just another Perl Hacker"; print prototype \&_
0d37d453 481SKIP: Abuses a fixed bug.
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482
483####### Split 1
484 split // => '"';
485${"@_"} = "/"; split // => eval join "+" => 1 .. 7;
486*{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
487%{"@_"} = %_ = (Just => another => Perl => Hacker); &{%{%_}};
21d7e22a 488SKIP: Hashes are now randomized.
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489EXPECT: $JaPH_s
490
491####### Split 2
492$" = "/"; split // => eval join "+" => 1 .. 7;
493*{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
494%_ = (Just => another => Perl => Hacker); &{%_};
21d7e22a 495SKIP: Hashes are now randomized.
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496EXPECT: $JaPH_s
497
498####### Split 3
499$" = "/"; split $, => eval join "+" => 1 .. 7;
500*{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
501%{"@_"} = %_ = (Just => another => Perl => Hacker); &{%{%_}};
21d7e22a 502SKIP: Hashes are now randomized.
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503EXPECT: $JaPH_s
504
505####### Here documents 1
506$_ = "\x3C\x3C\x45\x4F\x54"; s/<<EOT/<<EOT/e; print;
507Just another Perl Hacker
508EOT
509
510####### Here documents 2
511$_ = "\x3C\x3C\x45\x4F\x54";
512print if s/<<EOT/<<EOT/e;
513Just another Perl Hacker
514EOT
515
516####### Here documents 3
517$_ = "\x3C\x3C\x45\x4F\x54" and s/<<EOT/<<EOT/e and print;
518Just another Perl Hacker
519EOT
520
521####### Here documents 4
522$_ = "\x3C\x3C\x45\x4F\x54\n" and s/<<EOT/<<EOT/ee and print;
523"Just another Perl Hacker"
524EOT
525
526####### Self modifying code 1
527$_ = "goto F.print chop;\n=rekcaH lreP rehtona tsuJ";F1:eval
528SWITCHES: -w
529
530####### Overloaded constants 1
531BEGIN {$^H {q} = sub {pop and pop and print pop}; $^H = 2**4.2**12}
532"Just "; "another "; "Perl "; "Hacker";
760807ca 533SKIP_OS: qnx
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534
535####### Overloaded constants 2
536BEGIN {$^H {q} = sub {$_ [1] =~ y/S-ZA-IK-O/q-tc-fe-m/d; $_ [1]}; $^H = 0x28100}
537print "Just another PYTHON hacker\n";
538EXPECT: $JaPh
539
540####### Overloaded constants 3
541BEGIN {$^H {join "" => ("a" .. "z") [8, 13, 19, 4, 6, 4, 17]} = sub
542 {["", "Just ", "another ", "Perl ", "Hacker\n"] -> [shift]};
543 $^H = hex join "" => reverse map {int ($_ / 2)} 0 .. 4}
544print 1, 2, 3, 4;
545
546####### Overloaded constants 4
547BEGIN {$^H {join "" => ("a" .. "z") [8, 13, 19, 4, 6, 4, 17]} = sub
548 {["", "Just ", "another ", "Perl ", "Hacker"] -> [shift]};
549 $^H = hex join "" => reverse map {int ($_ / 2)} 0 .. 4}
550print 1, 2, 3, 4, "\n";
551
552####### Overloaded constants 5
553BEGIN {my $x = "Knuth heals rare project\n";
554 $^H {integer} = sub {my $y = shift; $_ = substr $x => $y & 0x1F, 1;
555 $y > 32 ? uc : lc}; $^H = hex join "" => 2, 1, 1, 0, 0}
556print 52,2,10,23,16,8,1,19,3,6,15,12,5,49,21,14,9,11,36,13,22,32,7,18,24;
557
558####### v-strings 1
559print v74.117.115.116.32;
560print v97.110.111.116.104.101.114.32;
561print v80.101.114.108.32;
562print v72.97.99.107.101.114.10;
563
564####### v-strings 2
565print 74.117.115.116.32;
566print 97.110.111.116.104.101.114.32;
567print 80.101.114.108.32;
568print 72.97.99.107.101.114.10;
569
570####### v-strings 3
571print v74.117.115.116.32, v97.110.111.116.104.101.114.32,
572 v80.101.114.108.32, v72.97.99.107.101.114.10;
573
574####### v-strings 4
575print 74.117.115.116.32, 97.110.111.116.104.101.114.32,
576 80.101.114.108.32, 72.97.99.107.101.114.10;
577
578####### v-strings 5
579print v74.117.115.116.32.97.110.111.116.104.101.114.
580 v32.80.101.114.108.32.72.97.99.107.101.114.10;
581
582####### v-strings 6
583print 74.117.115.116.32.97.110.111.116.104.101.114.
584 32.80.101.114.108.32.72.97.99.107.101.114.10;
585
586####### Symbolic references.
587map{${+chr}=chr}map{$_=>$_^ord$"}$=+$]..3*$=/2;
588print "$J$u$s$t $a$n$o$t$h$e$r $P$e$r$l $H$a$c$k$e$r\n";
589
590####### $; fun
591$; # A lone dollar?
592=$"; # Pod?
593$; # The return of the lone dollar?
594{Just=>another=>Perl=>Hacker=>} # Bare block?
595=$/; # More pod?
596print%; # No right operand for %?
597
598####### @; fun
599@;=split//=>"Joel, Preach sartre knuth\n";$;=chr 65;%;=map{$;++=>$_}
6000,22,13,16,5,14,21,1,23,11,2,7,12,6,8,15,3,19,24,14,10,20,18,17,4,25
601;print@;[@;{A..Z}];
602EXPECT: $JaPh_c
603
604####### %; fun
605$;=$";$;{Just=>another=>Perl=>Hacker=>}=$/;print%;
606
607####### &func;
608$_ = "\112\165\163\1648\141\156\157\164\150\145\1628\120\145"
609 . "\162\1548\110\141\143\153\145\162\0128\177" and &japh;
610sub japh {print "@_" and return if pop; split /\d/ and &japh}
611
612####### magic goto.
613sub _ {$_ = shift and y/b-yB-Y/a-yB-Y/ xor !@ _?
614 exit print :
615 print and push @_ => shift and goto &{(caller (0)) [3]}}
616 split // => "KsvQtbuf fbsodpmu\ni flsI " xor & _
617
618####### $: fun 1
619:$:=~s:$":Just$&another$&:;$:=~s:
620:Perl$"Hacker$&:;chop$:;print$:#:
621
622####### $: fun 2
623 :;$:=~s:
624-:;another Perl Hacker
625 :;chop
626$:;$:=~y
627 :;::d;print+Just.
628$:;
629
630####### $: fun 3
631 :;$:=~s:
632-:;another Perl Hacker
633 :;chop
634$:;$:=~y:;::d;print+Just.$:
635
636####### $!
637s[$,][join$,,(split$,,($!=85))[(q[0006143730380126152532042307].
638q[41342211132019313505])=~m[..]g]]e and y[yIbp][HJkP] and print;
639SKIP: Platform dependent.
640
641####### die 1
642eval {die ["Just another Perl Hacker"]}; print ${$@}[$#{@${@}}]
643
644####### die 2
645eval {die ["Just another Perl Hacker\n"]}; print ${$@}[$#{@${@}}]
646
647####### die 3
648eval {die ["Just another Perl Hacker"]}; print ${${@}}[$#{@{${@}}}]
649
650####### die 4
651eval {die ["Just another Perl Hacker\n"]}; print ${${@}}[$#{@{${@}}}]
652
653####### die 5
654eval {die [[qq [Just another Perl Hacker]]]};; print
655${${${@}}[$#{@{${@}}}]}[$#{${@{${@}}}[$#{@{${@}}}]}]
4d5114b4 656SKIP: Abuses a fixed bug; what is in $#{...} must be an arrayref, not an array
6990bd83
A
657
658####### Closure returning itself.
659$_ = "\nrekcaH lreP rehtona tsuJ"; my $chop; $chop = sub {print chop; $chop};
660$chop -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> ()
661-> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> ()
662
663####### Special blocks 1
664BEGIN {print "Just " }
665CHECK {print "another "}
666INIT {print "Perl " }
667END {print "Hacker\n"}
668
669####### Special blocks 2
670END {print "Hacker\n"}
671INIT {print "Perl " }
672CHECK {print "another "}
673BEGIN {print "Just " }
674
675####### Recursive regex.
676 my $qr = qr/^.+?(;).+?\1|;Just another Perl Hacker;|;.+$/;
677 $qr =~ s/$qr//g;
678print $qr, "\n";
679
680####### use lib 'coderef'
681use lib sub {($\) = split /\./ => pop; print $"};
682eval "use Just" || eval "use another" || eval "use Perl" || eval "use Hacker";
683EXPECT
684 Just another Perl Hacker