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#use strict;
#use warnings;
#
#use Scalar::Util qw(looks_like_number blessed reftype refaddr);
#
#require Exporter;
#our @ISA = qw(Exporter);
#our @EXPORT = qw(dd dmp);
#
#our %_seen_refaddrs;
#our %_subscripts;
#our @_fixups;
#
#our $OPT_PERL_VERSION = "5.010";
#our $OPT_REMOVE_PRAGMAS = 0;
#our $OPT_DEPARSE = 1;
#our $OPT_STRINGIFY_NUMBERS = 0;
#
#my %esc = (
#    "\a" => "\\a",
#    "\b" => "\\b",
#    "\t" => "\\t",
#    "\n" => "\\n",
#    "\f" => "\\f",
#    "\r" => "\\r",
#    "\e" => "\\e",
#);
#
#sub _double_quote {
#    local($_) = $_[0];
#
#    s/([\\\"\@\$])/\\$1/g;
#    return qq("$_") unless /[^\040-\176]/;  
#
#    s/([\a\b\t\n\f\r\e])/$esc{$1}/g;
#
#    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($1))/eg;
#
#    return qq("$_");
#}
#
#sub _dump_code {
#    my $code = shift;
#
#    state $deparse = do {
#        require B::Deparse;
#        B::Deparse->new("-l"); 
#    };
#
#    my $res = $deparse->coderef2text($code);
#
#    my ($res_before_first_line, $res_after_first_line) =
#        $res =~ /(.+?)^(#line .+)/ms;
#
#    if ($OPT_REMOVE_PRAGMAS) {
#        $res_before_first_line = "{";
#    } elsif ($OPT_PERL_VERSION < 5.016) {
#        $res_before_first_line =~ s/no feature ':all';/no feature;/m;
#    }
#    $res_after_first_line =~ s/^#line .+//gm;
#
#    $res = "sub" . $res_before_first_line . $res_after_first_line;
#    $res =~ s/^\s+//gm;
#    $res =~ s/\n+//g;
#    $res =~ s/;\}\z/}/;
#    $res;
#}
#
#sub _quote_key {
#    $_[0] =~ /\A-?[A-Za-z_][A-Za-z0-9_]*\z/ ||
#        $_[0] =~ /\A-?[1-9][0-9]{0,8}\z/ ? $_[0] : _double_quote($_[0]);
#}
#
#sub _dump {
#    my ($val, $subscript) = @_;
#
#    my $ref = ref($val);
#    if ($ref eq '') {
#        if (!defined($val)) {
#            return "undef";
#        } elsif (looks_like_number($val) && !$OPT_STRINGIFY_NUMBERS &&
#                     $val eq $val+0 &&
#                     $val !~ /\A-?(?:inf(?:inity)?|nan)\z/i
#                 ) {
#            return $val;
#        } else {
#            return _double_quote($val);
#        }
#    }
#    my $refaddr = refaddr($val);
#    $_subscripts{$refaddr} //= $subscript;
#    if ($_seen_refaddrs{$refaddr}++) {
#        push @_fixups, "\$a->$subscript=\$a",
#            ($_subscripts{$refaddr} ? "->$_subscripts{$refaddr}" : ""), ";";
#        return "'fix'";
#    }
#
#    my $class;
#
#    if ($ref eq 'Regexp' || $ref eq 'REGEXP') {
#        require Regexp::Stringify;
#        return Regexp::Stringify::stringify_regexp(
#            regexp=>$val, with_qr=>1, plver=>$OPT_PERL_VERSION);
#    }
#
#    if (blessed $val) {
#        $class = $ref;
#        $ref = reftype($val);
#    }
#
#    my $res;
#    if ($ref eq 'ARRAY') {
#        $res = "[";
#        my $i = 0;
#        for (@$val) {
#            $res .= "," if $i;
#            $res .= _dump($_, "$subscript\[$i]");
#            $i++;