Embedding external types

[Gorni819]

How do you feel about adding some functions, for example func Embed(exteranTypeInstance any) to reuse external type definitions with their methods? I want to use methods of go types from external libs. I found a solution with "ConvertTo()", but in my opinion it is too inconveniently to write every time something like res.ConvertToMyCustomExternalType().MyMethod().

Or is there any other way to make it possible to use res.MyMethod() directly?

[raphael]

Can you describe a bit more the details of how that would work? what is the DSL? effect on the generated code? The code generation algorithms need to know the exact structure of the types to generate the correct code. In particular to properly run validations before unmarshaling Goa needs to generate versions of types where primitive fields are all pointers to check for nil before copying (recursively) into the final type. So not impossible but certainly not trivial either.

[Gorni819]

Hm, I think that I get complexity of the task. I don’t know if this is very much in demand for other users, but I would be very happy to see this implementation in future releases. Here examples how I see it:
dsl can be:

var MyType = Type("my_type", func(){
  Embed(external.Type{})
})

The generated result would be:

type MyType struct {
  external.Type
}