IdrisDoc: Prelude.Uninhabited

# Prelude.Uninhabited

Utilities for working with uninhabited types, to record explicit
locations for canonical proofs of emptiness. Typically, one should
use the `absurd` function.

interface Uninhabited

  A canonical proof that some type is empty

  uninhabited : Uninhabited t => t -> Void

    If I have a t, I've had a contradiction

absurd : Uninhabited t => (h : t) -> a

  Use an absurd assumption to discharge a proof obligation

  a

    the goal type

  t

    some empty type

  h

    the contradictory hypothesis