I'm not a Haskell programmer, but from my limited awareness: Wouldn't they want to encode the restriction that April 31 doesn't exist directly in the type system instead of using raw integers for the underlying struct?
A very specific shortcoming of this implementation is indeed "Day of Month" and "Month of Year" aren't given their own types! The type specification should likely be applied all the way down! I felt the examples conveyed the point well enough and it was shorter in many cases.
Comments
I'm not a Haskell programmer, but from my limited awareness: Wouldn't they want to encode the restriction that April 31 doesn't exist directly in the type system instead of using raw integers for the underlying struct?
A very specific shortcoming of this implementation is indeed "Day of Month" and "Month of Year" aren't given their own types! The type specification should likely be applied all the way down! I felt the examples conveyed the point well enough and it was shorter in many cases.