TypeResolver is a library, that provides a macro to resolve typespecs. It returns a native type that is represented in easy to handle structs. A native type is a type defined of typespec built-ins - no more user types are referenced, type parameters were resolved, …

E.g. the following call

TypeResolver.resolve(integer() | String.t())

will result in

%TypeResolver.UnionT{
  inner: [%TypeResolver.Types.IntegerT{}, %TypeResolver.Types.BinaryT{}]
}

TypeResolver doesn’t need any compiler modifications and works with macros only.

We saw the need for such a library, since we haven’t found a simple solution to resolve and handle typespecs easily. Using TypeResolver we can now lift typespecs into run time. At some point we will e.g. release a TypedStruct plugin that derives validation based on typespecs.

Happy coding!