A quick statement first (from the page you get to when you click on use):

Excepting that Module must be a bareword, use is exactly equivalent to 

BEGIN { require Module; import Module LIST; }

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Now, require is a run-time compilation and use is a compile-time compilation. I've often done something along the lines of 
my $moduleName = "Foo::Bar::$var";
require $moduleName;

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With appropriate checks on $var, of course!

The real question arises as to whether or not OO Perl should be doing anything with import(). I would say that it shouldn't be, because import() would seem to violate encapsulation. Instead, require would seem to be indicated. And, if all your requires are on top, then it's almost as if you're doing it at compile-time, because they're the first things to be run.

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In reply to Is use really appropriate in a OO system? by dragonchild

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