Haskus.Utils.TimedValue

Mutable value with associated last write time

Documentation

data TimedValue t a

Value with Eq/Ord instances uniquely based on time field indicating the time the value was last written.

This can be used with IOVar/IOTree which use Eq instances to detect value changes. It can be useful for values that we don't want to structurally compare (because it is too costly or because we can't)

t should be SystemTime (fast to query monotonic clock)

Constructors

TimedValue t a

Instances

Eq t => Eq (TimedValue t a)

Defined in Haskus.Utils.TimedValue

Methods

(==) :: TimedValue t a -> TimedValue t a -> Bool

(/=) :: TimedValue t a -> TimedValue t a -> Bool

Ord t => Ord (TimedValue t a)

Defined in Haskus.Utils.TimedValue

Methods

compare :: TimedValue t a -> TimedValue t a -> Ordering

(<) :: TimedValue t a -> TimedValue t a -> Bool

(<=) :: TimedValue t a -> TimedValue t a -> Bool

(>) :: TimedValue t a -> TimedValue t a -> Bool

(>=) :: TimedValue t a -> TimedValue t a -> Bool

max :: TimedValue t a -> TimedValue t a -> TimedValue t a

min :: TimedValue t a -> TimedValue t a -> TimedValue t a