While this will probably work, it ends up with the same problem from the original idea: you have to maintain a repository of new functions which may be overlooked.
You could skip the repository, and so something like
if ( -f "$attr.sub" ) {
# load and eval "$attr.sub"
goto &$attr;
}
I used a registry so that you could stage the debugging of new functions. If that isn't an issue for you, then don't use a registry. I've used a registry for something like this in years past, and have found it useful, but YMMV.
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