Suppose I have such a module
module Foo abstract type Bar end function do_something(bar::Bar) bar_prepared = prepare(bar) "do something" end end
My intention for the user is that the user will define a concrete type that is a subtype of
Bar and define a function
prepare on that concrete type. Then they can call
do_something in my module.
Right now, I declare the function by define a dummy function
function prepare() return nothing end
but I am not happy with this. What would be your suggestion?