Data.NF.Internal

This module provides the constructor for the type NF, allowing you to create values of type NF without any runtime overhead if you fulfill a proof obligation that the value is already in normal form.

Documentation

newtype NF a

NF is an abstract data type representing data which has been evaluated to normal form. Specifically, if a value of type NF a is in weak head normal form, then it is in reduced normal form; alternatively, it is only necessary to seq an NF a to assure that it is fully evaluated.

Constructors

UnsafeNF a

For UnsafeNF x to preserve the NF invariant, you must show that UnsafeNF x == deepseq x (UnsafeNF x).

Instances

Eq a => Eq (NF a)

Ord a => Ord (NF a)

NFData (NF a)

Typeable (* -> *) NF