CP is one of many IDLs [1]. IDLs are great, but there is always an impedance mismatch in translating a language's native data structures to a language-independ

CP is one of many IDLs [1]. IDLs are great, but there is always an impedance mismatch in translating a language's native data structures to a language-independent IDL. Someone has to do this work, though there are sometimes various scary ways to do it automatically. In any case, the idea that validating or describing external or untrusted data is the job of an additional system outside the programming language, rather than the job of the language's type system, seems mainly historical. Sending data over the network was a new and unusual use case when most of today's languages were being designed. It isn't now. [1] https://en.wikipedia.org/wiki/Interface_description_language https://en.wikipedia.org/wiki/Interface_description_language