This file is indexed.

/usr/share/perl5/Data/Dump.pm is in libdata-dump-perl 1.22-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
package Data::Dump;

use strict;
use vars qw(@EXPORT @EXPORT_OK $VERSION $DEBUG);
use subs qq(dump);

require Exporter;
*import = \&Exporter::import;
@EXPORT = qw(dd ddx);
@EXPORT_OK = qw(dump pp dumpf quote);

$VERSION = "1.22";
$DEBUG = 0;

use overload ();
use vars qw(%seen %refcnt @dump @fixup %require $TRY_BASE64 @FILTERS $INDENT);

$TRY_BASE64 = 50 unless defined $TRY_BASE64;
$INDENT = "  " unless defined $INDENT;

sub dump
{
    local %seen;
    local %refcnt;
    local %require;
    local @fixup;

    require Data::Dump::FilterContext if @FILTERS;

    my $name = "a";
    my @dump;

    for my $v (@_) {
	my $val = _dump($v, $name, [], tied($v));
	push(@dump, [$name, $val]);
    } continue {
	$name++;
    }

    my $out = "";
    if (%require) {
	for (sort keys %require) {
	    $out .= "require $_;\n";
	}
    }
    if (%refcnt) {
	# output all those with refcounts first
	for (@dump) {
	    my $name = $_->[0];
	    if ($refcnt{$name}) {
		$out .= "my \$$name = $_->[1];\n";
		undef $_->[1];
	    }
	}
	for (@fixup) {
	    $out .= "$_;\n";
	}
    }

    my $paren = (@dump != 1);
    $out .= "(" if $paren;
    $out .= format_list($paren, undef,
			map {defined($_->[1]) ? $_->[1] : "\$".$_->[0]}
			    @dump
		       );
    $out .= ")" if $paren;

    if (%refcnt || %require) {
	$out .= ";\n";
	$out =~ s/^/$INDENT/gm;
	$out = "do {\n$out}";
    }

    print STDERR "$out\n" unless defined wantarray;
    $out;
}

*pp = \&dump;

sub dd {
    print dump(@_), "\n";
}

sub ddx {
    my(undef, $file, $line) = caller;
    $file =~ s,.*[\\/],,;
    my $out = "$file:$line: " . dump(@_) . "\n";
    $out =~ s/^/# /gm;
    print $out;
}

sub dumpf {
    require Data::Dump::Filtered;
    goto &Data::Dump::Filtered::dump_filtered;
}

sub _dump
{
    my $ref  = ref $_[0];
    my $rval = $ref ? $_[0] : \$_[0];
    shift;

    my($name, $idx, $dont_remember, $pclass, $pidx) = @_;

    my($class, $type, $id);
    my $strval = overload::StrVal($rval);
    # Parse $strval without using regexps, in order not to clobber $1, $2,...
    if ((my $i = rindex($strval, "=")) >= 0) {
	$class = substr($strval, 0, $i);
	$strval = substr($strval, $i+1);
    }
    if ((my $i = index($strval, "(0x")) >= 0) {
	$type = substr($strval, 0, $i);
	$id = substr($strval, $i + 2, -1);
    }
    else {
	die "Can't parse " . overload::StrVal($rval);
    }
    if ($] < 5.008 && $type eq "SCALAR") {
	$type = "REF" if $ref eq "REF";
    }
    warn "\$$name(@$idx) $class $type $id ($ref)" if $DEBUG;

    my $out;
    my $comment;
    my $hide_keys;
    if (@FILTERS) {
	my $pself = "";
	$pself = fullname("self", [@$idx[$pidx..(@$idx - 1)]]) if $pclass;
	my $ctx = Data::Dump::FilterContext->new($rval, $class, $type, $ref, $pclass, $pidx, $idx);
	my @bless;
	for my $filter (@FILTERS) {
	    if (my $f = $filter->($ctx, $rval)) {
		if (my $v = $f->{object}) {
		    local @FILTERS;
		    $out = _dump($v, $name, $idx, 1);
		    $dont_remember++;
		}
		if (defined(my $c = $f->{bless})) {
		    push(@bless, $c);
		}
		if (my $c = $f->{comment}) {
		    $comment = $c;
		}
		if (defined(my $c = $f->{dump})) {
		    $out = $c;
		    $dont_remember++;
		}
		if (my $h = $f->{hide_keys}) {
		    if (ref($h) eq "ARRAY") {
			$hide_keys = sub {
			    for my $k (@$h) {
				return 1 if $k eq $_[0];
			    }
			    return 0;
			};
		    }
		}
	    }
	}
	push(@bless, "") if defined($out) && !@bless;
	if (@bless) {
	    $class = shift(@bless);
	    warn "More than one filter callback tried to bless object" if @bless;
	}
    }

    unless ($dont_remember) {
	if (my $s = $seen{$id}) {
	    my($sname, $sidx) = @$s;
	    $refcnt{$sname}++;
	    my $sref = fullname($sname, $sidx,
				($ref && $type eq "SCALAR"));
	    warn "SEEN: [\$$name(@$idx)] => [\$$sname(@$sidx)] ($ref,$sref)" if $DEBUG;
	    return $sref unless $sname eq $name;
	    $refcnt{$name}++;
	    push(@fixup, fullname($name,$idx)." = $sref");
	    return "do{my \$fix}" if @$idx && $idx->[-1] eq '$';
	    return "'fix'";
	}
	$seen{$id} = [$name, $idx];
    }

    if ($class) {
	$pclass = $class;
	$pidx = @$idx;
    }

    if (defined $out) {
	# keep it
    }
    elsif ($type eq "SCALAR" || $type eq "REF" || $type eq "REGEXP") {
	if ($ref) {
	    if ($class && $class eq "Regexp") {
		my $v = "$rval";

		my $mod = "";
		if ($v =~ /^\(\?\^?([msix-]*):([\x00-\xFF]*)\)\z/) {
		    $mod = $1;
		    $v = $2;
		    $mod =~ s/-.*//;
		}

		my $sep = '/';
		my $sep_count = ($v =~ tr/\///);
		if ($sep_count) {
		    # see if we can find a better one
		    for ('|', ',', ':', '#') {
			my $c = eval "\$v =~ tr/\Q$_\E//";
			#print "SEP $_ $c $sep_count\n";
			if ($c < $sep_count) {
			    $sep = $_;
			    $sep_count = $c;
			    last if $sep_count == 0;
			}
		    }
		}
		$v =~ s/\Q$sep\E/\\$sep/g;

		$out = "qr$sep$v$sep$mod";
		undef($class);
	    }
	    else {
		delete $seen{$id} if $type eq "SCALAR";  # will be seen again shortly
		my $val = _dump($$rval, $name, [@$idx, "\$"], 0, $pclass, $pidx);
		$out = $class ? "do{\\(my \$o = $val)}" : "\\$val";
	    }
	} else {
	    if (!defined $$rval) {
		$out = "undef";
	    }
	    elsif (do {no warnings 'numeric'; $$rval + 0 eq $$rval}) {
		$out = $$rval;
	    }
	    else {
		$out = str($$rval);
	    }
	    if ($class && !@$idx) {
		# Top is an object, not a reference to one as perl needs
		$refcnt{$name}++;
		my $obj = fullname($name, $idx);
		my $cl  = quote($class);
		push(@fixup, "bless \\$obj, $cl");
	    }
	}
    }
    elsif ($type eq "GLOB") {
	if ($ref) {
	    delete $seen{$id};
	    my $val = _dump($$rval, $name, [@$idx, "*"], 0, $pclass, $pidx);
	    $out = "\\$val";
	    if ($out =~ /^\\\*Symbol::/) {
		$require{Symbol}++;
		$out = "Symbol::gensym()";
	    }
	} else {
	    my $val = "$$rval";
	    $out = "$$rval";

	    for my $k (qw(SCALAR ARRAY HASH)) {
		my $gval = *$$rval{$k};
		next unless defined $gval;
		next if $k eq "SCALAR" && ! defined $$gval;  # always there
		my $f = scalar @fixup;
		push(@fixup, "RESERVED");  # overwritten after _dump() below
		$gval = _dump($gval, $name, [@$idx, "*{$k}"], 0, $pclass, $pidx);
		$refcnt{$name}++;
		my $gname = fullname($name, $idx);
		$fixup[$f] = "$gname = $gval";  #XXX indent $gval
	    }
	}
    }
    elsif ($type eq "ARRAY") {
	my @vals;
	my $tied = tied_str(tied(@$rval));
	my $i = 0;
	for my $v (@$rval) {
	    push(@vals, _dump($v, $name, [@$idx, "[$i]"], $tied, $pclass, $pidx));
	    $i++;
	}
	$out = "[" . format_list(1, $tied, @vals) . "]";
    }
    elsif ($type eq "HASH") {
	my(@keys, @vals);
	my $tied = tied_str(tied(%$rval));

	# statistics to determine variation in key lengths
	my $kstat_max = 0;
	my $kstat_sum = 0;
	my $kstat_sum2 = 0;

	my @orig_keys = keys %$rval;
	if ($hide_keys) {
	    @orig_keys = grep !$hide_keys->($_), @orig_keys;
	}
	my $text_keys = 0;
	for (@orig_keys) {
	    $text_keys++, last unless /^[-+]?(?:0|[1-9]\d*)(?:\.\d+)?\z/;
	}

	if ($text_keys) {
	    @orig_keys = sort { lc($a) cmp lc($b) } @orig_keys;
	}
	else {
	    @orig_keys = sort { $a <=> $b } @orig_keys;
	}

	my $quote;
	for my $key (@orig_keys) {
	    next if $key =~ /^-?[a-zA-Z_]\w*\z/;
	    next if $key =~ /^-?[1-9]\d{0,8}\z/;
	    $quote++;
	    last;
	}

	for my $key (@orig_keys) {
	    my $val = \$rval->{$key};  # capture value before we modify $key
	    $key = quote($key) if $quote;
	    $kstat_max = length($key) if length($key) > $kstat_max;
	    $kstat_sum += length($key);
	    $kstat_sum2 += length($key)*length($key);

	    push(@keys, $key);
	    push(@vals, _dump($$val, $name, [@$idx, "{$key}"], $tied, $pclass, $pidx));
	}
	my $nl = "";
	my $klen_pad = 0;
	my $tmp = "@keys @vals";
	if (length($tmp) > 60 || $tmp =~ /\n/ || $tied) {
	    $nl = "\n";

	    # Determine what padding to add
	    if ($kstat_max < 4) {
		$klen_pad = $kstat_max;
	    }
	    elsif (@keys >= 2) {
		my $n = @keys;
		my $avg = $kstat_sum/$n;
		my $stddev = sqrt(($kstat_sum2 - $n * $avg * $avg) / ($n - 1));

		# I am not actually very happy with this heuristics
		if ($stddev / $kstat_max < 0.25) {
		    $klen_pad = $kstat_max;
		}
		if ($DEBUG) {
		    push(@keys, "__S");
		    push(@vals, sprintf("%.2f (%d/%.1f/%.1f)",
					$stddev / $kstat_max,
					$kstat_max, $avg, $stddev));
		}
	    }
	}
	$out = "{$nl";
	$out .= "$INDENT# $tied$nl" if $tied;
	while (@keys) {
	    my $key = shift @keys;
	    my $val = shift @vals;
	    my $vpad = $INDENT . (" " x ($klen_pad ? $klen_pad + 4 : 0));
	    $val =~ s/\n/\n$vpad/gm;
	    my $kpad = $nl ? $INDENT : " ";
	    $key .= " " x ($klen_pad - length($key)) if $nl;
	    $out .= "$kpad$key => $val,$nl";
	}
	$out =~ s/,$/ / unless $nl;
	$out .= "}";
    }
    elsif ($type eq "CODE") {
	$out = 'sub { ... }';
    }
    elsif ($type eq "VSTRING") {
        $out = sprintf +($ref ? '\v%vd' : 'v%vd'), $$rval;
    }
    else {
	warn "Can't handle $type data";
	$out = "'#$type#'";
    }

    if ($class && $ref) {
	$out = "bless($out, " . quote($class) . ")";
    }
    if ($comment) {
	$comment =~ s/^/# /gm;
	$comment .= "\n" unless $comment =~ /\n\z/;
	$comment =~ s/^#[ \t]+\n/\n/;
	$out = "$comment$out";
    }
    return $out;
}

sub tied_str {
    my $tied = shift;
    if ($tied) {
	if (my $tied_ref = ref($tied)) {
	    $tied = "tied $tied_ref";
	}
	else {
	    $tied = "tied";
	}
    }
    return $tied;
}

sub fullname
{
    my($name, $idx, $ref) = @_;
    substr($name, 0, 0) = "\$";

    my @i = @$idx;  # need copy in order to not modify @$idx
    if ($ref && @i && $i[0] eq "\$") {
	shift(@i);  # remove one deref
	$ref = 0;
    }
    while (@i && $i[0] eq "\$") {
	shift @i;
	$name = "\$$name";
    }

    my $last_was_index;
    for my $i (@i) {
	if ($i eq "*" || $i eq "\$") {
	    $last_was_index = 0;
	    $name = "$i\{$name}";
	} elsif ($i =~ s/^\*//) {
	    $name .= $i;
	    $last_was_index++;
	} else {
	    $name .= "->" unless $last_was_index++;
	    $name .= $i;
	}
    }
    $name = "\\$name" if $ref;
    $name;
}

sub format_list
{
    my $paren = shift;
    my $comment = shift;
    my $indent_lim = $paren ? 0 : 1;
    if (@_ > 3) {
	# can we use range operator to shorten the list?
	my $i = 0;
	while ($i < @_) {
	    my $j = $i + 1;
	    my $v = $_[$i];
	    while ($j < @_) {
		# XXX allow string increment too?
		if ($v eq "0" || $v =~ /^-?[1-9]\d{0,9}\z/) {
		    $v++;
		}
		elsif ($v =~ /^"([A-Za-z]{1,3}\d*)"\z/) {
		    $v = $1;
		    $v++;
		    $v = qq("$v");
		}
		else {
		    last;
		}
		last if $_[$j] ne $v;
		$j++;
	    }
	    if ($j - $i > 3) {
		splice(@_, $i, $j - $i, "$_[$i] .. $_[$j-1]");
	    }
	    $i++;
	}
    }
    my $tmp = "@_";
    if ($comment || (@_ > $indent_lim && (length($tmp) > 60 || $tmp =~ /\n/))) {
	my @elem = @_;
	for (@elem) { s/^/$INDENT/gm; }
	return "\n" . ($comment ? "$INDENT# $comment\n" : "") .
               join(",\n", @elem, "");
    } else {
	return join(", ", @_);
    }
}

sub str {
  if (length($_[0]) > 20) {
      for ($_[0]) {
      # Check for repeated string
      if (/^(.)\1\1\1/s) {
          # seems to be a repating sequence, let's check if it really is
          # without backtracking
          unless (/[^\Q$1\E]/) {
              my $base = quote($1);
              my $repeat = length;
              return "($base x $repeat)"
          }
      }
      # Length protection because the RE engine will blow the stack [RT#33520]
      if (length($_) < 16 * 1024 && /^(.{2,5}?)\1*\z/s) {
	  my $base   = quote($1);
	  my $repeat = length($_)/length($1);
	  return "($base x $repeat)";
      }
      }
  }

  local $_ = &quote;

  if (length($_) > 40  && !/\\x\{/ && length($_) > (length($_[0]) * 2)) {
      # too much binary data, better to represent as a hex/base64 string

      # Base64 is more compact than hex when string is longer than
      # 17 bytes (not counting any require statement needed).
      # But on the other hand, hex is much more readable.
      if ($TRY_BASE64 && length($_[0]) > $TRY_BASE64 &&
	  (defined &utf8::is_utf8 && !utf8::is_utf8($_[0])) &&
	  eval { require MIME::Base64 })
      {
	  $require{"MIME::Base64"}++;
	  return "MIME::Base64::decode(\"" .
	             MIME::Base64::encode($_[0],"") .
		 "\")";
      }
      return "pack(\"H*\",\"" . unpack("H*", $_[0]) . "\")";
  }

  return $_;
}

my %esc = (
    "\a" => "\\a",
    "\b" => "\\b",
    "\t" => "\\t",
    "\n" => "\\n",
    "\f" => "\\f",
    "\r" => "\\r",
    "\e" => "\\e",
);

# put a string value in double quotes
sub quote {
  local($_) = $_[0];
  # If there are many '"' we might want to use qq() instead
  s/([\\\"\@\$])/\\$1/g;
  return qq("$_") unless /[^\040-\176]/;  # fast exit

  s/([\a\b\t\n\f\r\e])/$esc{$1}/g;

  # no need for 3 digits in escape for these
  s/([\0-\037])(?!\d)/sprintf('\\%o',ord($1))/eg;

  s/([\0-\037\177-\377])/sprintf('\\x%02X',ord($1))/eg;
  s/([^\040-\176])/sprintf('\\x{%X}',ord($1))/eg;

  return qq("$_");
}

1;

__END__

=head1 NAME

Data::Dump - Pretty printing of data structures

=head1 SYNOPSIS

 use Data::Dump qw(dump);

 $str = dump(@list);
 @copy_of_list = eval $str;

 # or use it for easy debug printout
 use Data::Dump; dd localtime;

=head1 DESCRIPTION

This module provide a few functions that traverse their
argument and produces a string as its result.  The string contains
Perl code that, when C<eval>ed, produces a deep copy of the original
arguments.

The main feature of the module is that it strives to produce output
that is easy to read.  Example:

    @a = (1, [2, 3], {4 => 5});
    dump(@a);

Produces:

    "(1, [2, 3], { 4 => 5 })"

If you dump just a little data, it is output on a single line. If
you dump data that is more complex or there is a lot of it, line breaks
are automatically added to keep it easy to read.

The following functions are provided (only the dd* functions are exported by default):

=over

=item dump( ... )

=item pp( ... )

Returns a string containing a Perl expression.  If you pass this
string to Perl's built-in eval() function it should return a copy of
the arguments you passed to dump().

If you call the function with multiple arguments then the output will
be wrapped in parenthesis "( ..., ... )".  If you call the function with a
single argument the output will not have the wrapping.  If you call the function with
a single scalar (non-reference) argument it will just return the
scalar quoted if needed, but never break it into multiple lines.  If you
pass multiple arguments or references to arrays of hashes then the
return value might contain line breaks to format it for easier
reading.  The returned string will never be "\n" terminated, even if
contains multiple lines.  This allows code like this to place the
semicolon in the expected place:

   print '$obj = ', dump($obj), ";\n";

If dump() is called in void context, then the dump is printed on
STDERR and then "\n" terminated.  You might find this useful for quick
debug printouts, but the dd*() functions might be better alternatives
for this.

There is no difference between dump() and pp(), except that dump()
shares its name with a not-so-useful perl builtin.  Because of this
some might want to avoid using that name.

=item quote( $string )

Returns a quoted version of the provided string.

It differs from C<dump($string)> in that it will quote even numbers and
not try to come up with clever expressions that might shorten the
output.  If a non-scalar argument is provided then it's just stringified
instead of traversed.

=item dd( ... )

=item ddx( ... )

These functions will call dump() on their argument and print the
result to STDOUT (actually, it's the currently selected output handle, but
STDOUT is the default for that).

The difference between them is only that ddx() will prefix the lines
it prints with "# " and mark the first line with the file and line
number where it was called.  This is meant to be useful for debug
printouts of state within programs.

=item dumpf( ..., \&filter )

Short hand for calling the dump_filtered() function of L<Data::Dump::Filtered>.
This works like dump(), but the last argument should be a filter callback
function.  As objects are visited the filter callback is invoked and it
can modify how the objects are dumped.

=back

=head1 CONFIGURATION

There are a few global variables that can be set to modify the output
generated by the dump functions.  It's wise to localize the setting of
these.

=over

=item $Data::Dump::INDENT

This holds the string that's used for indenting multiline data structures.
It's default value is "  " (two spaces).  Set it to "" to suppress indentation.
Setting it to "| " makes for nice visuals even if the dump output then fails to
be valid Perl.

=item $Data::Dump::TRY_BASE64

How long must a binary string be before we try to use the base64 encoding
for the dump output.  The default is 50.  Set it to 0 to disable base64 dumps.

=back


=head1 LIMITATIONS

Code references will be dumped as C<< sub { ... } >>. Thus, C<eval>ing them will
not reproduce the original routine.  The C<...>-operator used will also require
perl-5.12 or better to be evaled.

If you forget to explicitly import the C<dump> function, your code will
core dump. That's because you just called the builtin C<dump> function
by accident, which intentionally dumps core.  Because of this you can
also import the same function as C<pp>, mnemonic for "pretty-print".

=head1 HISTORY

The C<Data::Dump> module grew out of frustration with Sarathy's
in-most-cases-excellent C<Data::Dumper>.  Basic ideas and some code
are shared with Sarathy's module.

The C<Data::Dump> module provides a much simpler interface than
C<Data::Dumper>.  No OO interface is available and there are fewer
configuration options to worry about.  The other benefit is
that the dump produced does not try to set any variables.  It only
returns what is needed to produce a copy of the arguments.  This means
that C<dump("foo")> simply returns C<'"foo"'>, and C<dump(1..3)> simply
returns C<'(1, 2, 3)'>.

=head1 SEE ALSO

L<Data::Dump::Filtered>, L<Data::Dump::Trace>, L<Data::Dumper>, L<JSON>,
L<Storable>

=head1 AUTHORS

The C<Data::Dump> module is written by Gisle Aas <gisle@aas.no>, based
on C<Data::Dumper> by Gurusamy Sarathy <gsar@umich.edu>.

 Copyright 1998-2010 Gisle Aas.
 Copyright 1996-1998 Gurusamy Sarathy.

This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

=cut