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function if an only if it has exactly one member named the same thing as 
itself, and that member is a function declaration.  Aliases are not function 
declarations so it fails, though one could argue that an alias is simply a 
reference _to_ another symbol, so this should work.  Of course, none of this 
is specified.

It can't deduce the template function on line 9 simply because it doesn't 
think that Foo is a template function.