Private types

[saleynik]

It doesn't seem to be possible to define structs with private types. E.g.:

defstruct [
  a: nil,
  b: nil
]
@typep  t :: %__MODULE__{
  a: integer,
  b: binary
}

It would be great if typedstruct had a visibility or accessor attribute to control private|public visibility.

[ejpcmac]

Indeed, this is a miss. Not sure if there are much use cases for it, since the struct itself cannot be made private, but there is no reason for this feature not to be present.

We already have opaque: true, which we could replace in a later version by visibility: which could be :public (default), :private or :opaque.