HashtablesPlus.HashRef

Documentation

data HashRef a

A reference to a mutable value, which provides instances for Hashable and Eq.

It allows to use the values without those instances as keys in hash tables.

Constructors

HashRef !(StableName a) !a

Instances

Eq (HashRef a)

Hashable (HashRef a)

new :: a -> IO (HashRef a)

Create a new reference.

Two references created from the same value are not guaranteed to be equal or produce the same hash. However the references created from different values are guaranteed to be different.

value :: HashRef a -> a

Extract the value from this reference.