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In the course of creating a sort of "restricted" scalar type, I've d The idea is to create a variable which is restricted, for example, a scalar which can only contain a fixed number of characters. Ideally, it would work something like this:
my $super_scalar = SuperScalar->new(length => 15);
Which would make $special_scalar type 'SuperScalar', though as you can see, the mechanics of this are not so simply implemented.

So far, I have to make $special_scalar a reference to the actual "special scalar" tie'd variable, which means when you use this thing it gets all messy: 
$super_scalar = "Something Really Big...";

print $super_scalar,"$_\n";   # Prints "Something Reall\n"

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The limitation, it seems, is that when a scalar imports a value from another, it doesn't import the tied type.