${ *{${ns} . '::foo'} } = $cram;

[download]

You could also write 

${ $::{$ns.'::'}{foo} } = $cram;

[download]

in which case you wouldn't need the no strict 'refs'. 

#!/usr/bin/perl -l
use strict;
use warnings;

my $ns = 'Teddy::';

${ $::{$ns}{foo} } = 'cheese';
print '$Teddy::foo: ', $Teddy::foo;

# or the other way round
$Teddy::foo = 'bar';
print '${ $::{$ns}{foo} }: ', ${ $::{$ns}{foo} };

__END__
$Teddy::foo: cheese
${ $::{$ns}{foo} }: bar

[download]

The main stash %:: holds an entry 'Teddy::', whose value is the stash of that package (or more precisely, a glob whose hash part is the stash).  The latter holds an entry 'foo', whose value is a glob, the scalar slot of which you can select with ${ ... } 

print grep /Teddy/, keys %::;    # Teddy:: 
print $::{'Teddy::'};            # *main::Teddy::
print keys %{$::{'Teddy::'}};    # foo
print $::{'Teddy::'}{foo};       # *Teddy::foo

[download]


P.S.: you could also put a direct reference to a string 'cheese' in the scalar slot of the glob, in which case you would get a kind of read-only variable: 

$::{'Teddy::'}{foo} = \'cheese';

print $Teddy::foo;    # cheese
$Teddy::foo = 'bar';  # "Modification of a read-only value attempted a
+t ..."

[download]

In reply to Re: Stashing a Package Variable by Reference by almut
in thread Stashing a Package Variable by Reference by Xiong

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