IdrisDoc: Data.So

Data.So

choose : (b : Bool) -> Either (So b) (So (not b))

Perform a case analysis on a Boolean, providing clients with a So proof

data So : Bool -> Type

Ensure that some run-time Boolean test has been performed.

This lifts a Boolean predicate to the type level. See the function choose
if you need to perform a Boolean test and convince the type checker of this
fact.

If you find yourself using So for something other than primitive types,
it may be appropriate to define a type of evidence for the property that you
care about instead.

Oh : So True