Control.Applicative.Backwards

Making functors with an Applicative instance that performs actions in the reverse order.

NB: This module is only included in lens for backwards compatibility with transformers versions before 3.0.

Documentation

newtype Backwards f a

The same functor, but with an Applicative instance that performs actions in the reverse order.

Constructors

Backwards

Fields

forwards :: f a

Instances

Functor f => Functor (Backwards f)

Derived instance.

Applicative f => Applicative (Backwards f)

Apply f-actions in the reverse order.

Foldable f => Foldable (Backwards f)

Derived instance.

Traversable f => Traversable (Backwards f)

Derived instance.

Alternative f => Alternative (Backwards f)

Try alternatives in the same order as f.

Show1 f => Show1 (Backwards f)

Read1 f => Read1 (Backwards f)

Ord1 f => Ord1 (Backwards f)

Eq1 f => Eq1 (Backwards f)

(Eq1 f, Eq a) => Eq (Backwards f a)

(Ord1 f, Ord a) => Ord (Backwards f a)

(Read1 f, Read a) => Read (Backwards f a)

(Show1 f, Show a) => Show (Backwards f a)