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Perl	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
PerlIO	[ DIR ]	drwxrwxrwx	2018-02-14 11:37
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Benchmark.pm	30.3 KB	-rwxrwxrwx	2020-06-20 19:33
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CPAN.pm	136.91 KB	-rwxrwxrwx	2020-06-20 19:33
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Digest.pm	10.45 KB	-rwxrwxrwx	2020-06-20 19:33
DirHandle.pm	1.52 KB	-rwxrwxrwx	2020-06-20 19:33
Dumpvalue.pm	17.14 KB	-rwxrwxrwx	2020-06-20 19:33
English.pm	4.65 KB	-rwxrwxrwx	2020-06-20 19:33
Env.pm	5.39 KB	-rwxrwxrwx	2020-06-20 19:33
Exporter.pm	2.31 KB	-rwxrwxrwx	2020-06-20 19:33
Fatal.pm	56.91 KB	-rwxrwxrwx	2020-06-20 19:33
FileCache.pm	5.44 KB	-rwxrwxrwx	2020-06-20 19:33
FileHandle.pm	2.06 KB	-rwxrwxrwx	2020-06-20 19:33
FindBin.pm	4.45 KB	-rwxrwxrwx	2020-06-20 19:33
Memoize.pm	35.34 KB	-rwxrwxrwx	2020-06-20 19:33
NEXT.pm	18.05 KB	-rwxrwxrwx	2020-06-20 19:33
PerlIO.pm	10.21 KB	-rwxrwxrwx	2020-06-20 19:33
Safe.pm	24.4 KB	-rwxrwxrwx	2020-06-20 19:33
SelectSaver.pm	344 B	-rwxrwxrwx	2020-06-20 19:33
SelfLoader.pm	17.28 KB	-rwxrwxrwx	2020-06-20 19:33
Symbol.pm	2.05 KB	-rwxrwxrwx	2020-06-20 19:33
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UNIVERSAL.pm	6.44 KB	-rwxrwxrwx	2020-06-20 19:33
XSLoader.pm	3.81 KB	-rwxrwxrwx	2020-06-20 19:33
_charnames.pm	32.7 KB	-rwxrwxrwx	2020-06-20 19:33
autodie.pm	12.58 KB	-rwxrwxrwx	2020-06-20 19:33
autouse.pm	4.14 KB	-rwxrwxrwx	2020-06-20 19:33
base.pm	8.72 KB	-rwxrwxrwx	2020-06-20 19:33
bigint.pm	22.42 KB	-rwxrwxrwx	2020-06-20 19:33
bignum.pm	19.73 KB	-rwxrwxrwx	2020-06-20 19:33
bigrat.pm	15.28 KB	-rwxrwxrwx	2020-06-20 19:33
blib.pm	2.04 KB	-rwxrwxrwx	2020-06-20 19:33
bytes.pm	447 B	-rwxrwxrwx	2020-06-20 19:33
bytes_heavy.pl	758 B	-rwxrwxrwx	2020-06-20 19:33
charnames.pm	20.5 KB	-rwxrwxrwx	2020-06-20 19:33
constant.pm	5.6 KB	-rwxrwxrwx	2020-06-20 19:33
deprecate.pm	3.43 KB	-rwxrwxrwx	2020-06-20 19:33
diagnostics.pm	18.26 KB	-rwxrwxrwx	2020-06-20 19:33
dumpvar.pl	15.19 KB	-rwxrwxrwx	2020-06-20 19:33
experimental.pm	5.66 KB	-rwxrwxrwx	2020-06-20 19:33
feature.pm	4.21 KB	-rwxrwxrwx	2020-06-20 19:33
fields.pm	4.9 KB	-rwxrwxrwx	2020-06-20 19:33
filetest.pm	3.91 KB	-rwxrwxrwx	2020-06-20 19:33
if.pm	3.26 KB	-rwxrwxrwx	2020-06-20 19:33
integer.pm	172 B	-rwxrwxrwx	2020-06-20 19:33
less.pm	3.13 KB	-rwxrwxrwx	2020-06-20 19:33
locale.pm	3.34 KB	-rwxrwxrwx	2020-06-20 19:33
meta_notation.pm	2.07 KB	-rwxrwxrwx	2020-06-20 19:33
ok.pm	968 B	-rwxrwxrwx	2020-06-20 19:33
open.pm	7.83 KB	-rwxrwxrwx	2020-06-20 19:33
overload.pm	4.36 KB	-rwxrwxrwx	2020-06-20 19:33
overloading.pm	964 B	-rwxrwxrwx	2020-06-20 19:33
parent.pm	479 B	-rwxrwxrwx	2020-06-20 19:33
perl5db.pl	308.8 KB	-rwxrwxrwx	2020-06-20 19:33
perlfaq.pm	78 B	-rwxrwxrwx	2020-06-20 19:33
sigtrap.pm	7.43 KB	-rwxrwxrwx	2020-06-20 19:33
sort.pm	5.94 KB	-rwxrwxrwx	2020-06-20 19:33
strict.pm	1.57 KB	-rwxrwxrwx	2020-06-20 19:33
subs.pm	848 B	-rwxrwxrwx	2020-06-20 19:33
utf8.pm	342 B	-rwxrwxrwx	2020-06-20 19:33
utf8_heavy.pl	30.87 KB	-rwxrwxrwx	2020-06-20 19:33
vars.pm	1.12 KB	-rwxrwxrwx	2020-06-20 19:33
version.pm	1.67 KB	-rwxrwxrwx	2020-06-20 19:33
version.pod	9.63 KB	-rwxrwxrwx	2020-06-20 19:33
vmsish.pm	4.21 KB	-rwxrwxrwx	2020-06-20 19:33
warnings.pm	21.13 KB	-rwxrwxrwx	2020-06-20 19:33

Rename

package Symbol;

BEGIN { require 5.005; }

require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(gensym ungensym qualify qualify_to_ref);
@EXPORT_OK = qw(delete_package geniosym);

$VERSION = '1.07';

my $genpkg = "Symbol::";
my $genseq = 0;

my %global = map {$_ => 1} qw(ARGV ARGVOUT ENV INC SIG STDERR STDIN STDOUT);

#
# Note that we never _copy_ the glob; we just make a ref to it.
# If we did copy it, then SVf_FAKE would be set on the copy, and
# glob-specific behaviors (e.g. C<*$ref = \&func>) wouldn't work.
#
sub gensym () {
    my $name = "GEN" . $genseq++;
    my $ref = \*{$genpkg . $name};
    delete $$genpkg{$name};
    $ref;
}

sub geniosym () {
    my $sym = gensym();
    # force the IO slot to be filled
    select(select $sym);
    *$sym{IO};
}

sub ungensym ($) {}

sub qualify ($;$) {
    my ($name) = @_;
    if (!ref($name) && index($name, '::') == -1 && index($name, "'") == -1) {
	my $pkg;
	# Global names: special character, "^xyz", or other. 
	if ($name =~ /^(([^a-z])|(\^[a-z_]+))\z/i || $global{$name}) {
	    # RGS 2001-11-05 : translate leading ^X to control-char
	    $name =~ s/^\^([a-z_])/'qq(\c'.$1.')'/eei;
	    $pkg = "main";
	}
	else {
	    $pkg = (@_ > 1) ? $_[1] : caller;
	}
	$name = $pkg . "::" . $name;
    }
    $name;
}

sub qualify_to_ref ($;$) {
    return \*{ qualify $_[0], @_ > 1 ? $_[1] : caller };
}

#
# of Safe.pm lineage
#
sub delete_package ($) {
    my $pkg = shift;

# expand to full symbol table name if needed

unless ($pkg =~ /^main::.*::$/) {
        $pkg = "main$pkg"	if	$pkg =~ /^::/;
        $pkg = "main::$pkg"	unless	$pkg =~ /^main::/;
        $pkg .= '::'		unless	$pkg =~ /::$/;
    }

my($stem, $leaf) = $pkg =~ m/(.*::)(\w+::)$/;
    my $stem_symtab = *{$stem}{HASH};
    return unless defined $stem_symtab and exists $stem_symtab->{$leaf};

# free all the symbols in the package

my $leaf_symtab = *{$stem_symtab->{$leaf}}{HASH};
    foreach my $name (keys %$leaf_symtab) {
        undef *{$pkg . $name};
    }

# delete the symbol table

%$leaf_symtab = ();
    delete $stem_symtab->{$leaf};
}