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Name	Size	Permission	Date
Carp	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Exporter	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
File	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Getopt	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Hash	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
IO	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
IPC	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
List	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Scalar	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Text	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
Tie	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
auto	[ DIR ]	drwxrwxrwx	2017-06-01 17:09
unicore	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
warnings	[ DIR ]	drwxrwxrwx	2020-08-24 23:41
AutoLoader.pm	5.36 KB	-rwxrwxrwx	2020-06-20 19:33
Carp.pm	19.67 KB	-rwxrwxrwx	2020-06-20 19:33
Config.pm	3.25 KB	-rwxrwxrwx	2020-06-20 19:33
Config_git.pl	409 B	-rwxrwxrwx	2020-06-20 19:33
Config_heavy.pl	49.46 KB	-rwxrwxrwx	2020-06-20 19:33
Cwd.pm	18.11 KB	-rwxrwxrwx	2020-06-20 19:33
DynaLoader.pm	10.21 KB	-rwxrwxrwx	2020-06-20 19:33
Errno.pm	4.77 KB	-rwxrwxrwx	2020-06-20 19:33
Exporter.pm	2.31 KB	-rwxrwxrwx	2020-06-20 19:33
Fcntl.pm	2.11 KB	-rwxrwxrwx	2020-06-20 19:33
FileHandle.pm	2.06 KB	-rwxrwxrwx	2020-06-20 19:33
IO.pm	472 B	-rwxrwxrwx	2020-06-20 19:33
POSIX.pm	19.41 KB	-rwxrwxrwx	2020-06-20 19:33
SelectSaver.pm	344 B	-rwxrwxrwx	2020-06-20 19:33
Socket.pm	13.24 KB	-rwxrwxrwx	2020-06-20 19:33
Symbol.pm	2.05 KB	-rwxrwxrwx	2020-06-20 19:33
XSLoader.pm	3.81 KB	-rwxrwxrwx	2020-06-20 19:33
attributes.pm	2.95 KB	-rwxrwxrwx	2020-06-20 19:33
base.pm	8.72 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
constant.pm	5.6 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
integer.pm	172 B	-rwxrwxrwx	2020-06-20 19:33
lib.pm	2.23 KB	-rwxrwxrwx	2020-06-20 19:33
locale.pm	3.34 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
re.pm	8.44 KB	-rwxrwxrwx	2020-06-20 19:33
strict.pm	1.57 KB	-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
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};
}