Helper definitions and instances for Ordering

instance instReprOrdering : Repr Ordering

@[inline]

def Ordering.orElse : Ordering → Ordering → Ordering

Combine two Orderings lexicographically.

def Ordering.toRel {α : Type u_1} [LT α] : Ordering → α → α → Prop

The relation corresponding to each Ordering constructor (e.g. .lt.toProp a b is a < b).

def cmpUsing {α : Type u} (lt : α → α → Prop) [DecidableRel lt] (a : α) (b : α) : Ordering

Lift a decidable relation to an Ordering, assuming that incomparable terms are Ordering.eq.

def cmp {α : Type u} [LT α] [DecidableRel fun x x_1 => x < x_1] (a : α) (b : α) : Ordering

Construct an Ordering from a type with a decidable LT instance, assuming that incomparable terms are Ordering.eq.