I was trying to port example from [Functional Programming] Domain Modeling Made Functional (Pragprog) (F#) to Elixir. Of course F# is not Elixir, but the example remains interesting.
Thanks, so short answer is to not use literals for structures, maps, lists and other terms, but use functional wrapper with its own typespec which will return term as expression without any branching inside?
Yes, and then compose into bigger types, and bigger functions. Maybe like this.
@type good_hello() :: map()
@type bad_hello() :: map()
@type any_hello() :: good_hello() | bad_hello()
@spec hello(integer()) :: any_hello()
