typeclass and multiple deriving

[hs3180]

typeclass and deriving are very useful for composing interfaces.
and it should be easy mapping typeclass to S3 class in R.

[hs3180]

ClassA(x) %as% x
ClassB(x) %as% x
MyClass(x) %as% {
    ClassB(ClassA(x))
}

[hs3180]

with magrittr, it may be more clear.

ClassA(x) %as% x
ClassB(x) %as% x
MyClass(x) %as% {
    ClassA(x) %>% ClassB
}

[muxspace]

That's up to you if you want to use the pipe within your type constructor. Let me know if it doesn't work.

[hs3180]

you are right. pipe breaks lazy evaluation, following code may be better with functional package.

ClassA(x) %as% x
ClassB(x) %as% x
MyClass(x) %as% {
  Compose(ClassA, ClassB)(x)
}