Instantiating function from type?

[ffevotte]

Not sure whether there exist other solutions, but what you suggest here is more or less the same as the solution provided by @Mason in this older thread:

How to get a function instance from a function type?

No, because not all functions have a one-to-one relationship with their types. For instance, f = let x = 1 y -> x + y end captures runtime data and cannot be reconstructed from it’s type alone. That said, in the case of functions which are singleton instances, you could do if isdefined(tf, :instance) ft.instance else error("This type does not have a single instance") end