lens-4.15.1: Lenses, Folds and Traversals

Copyright (C) 2012-2016 Edward Kmett BSD-style (see the file LICENSE) Edward Kmett provisional portable Trustworthy Haskell98

Control.Parallel.Strategies.Lens

Description

A Lens or Traversal can be used to take the role of Traversable in Control.Parallel.Strategies, enabling those combinators to work with monomorphic containers.

Synopsis

# Documentation

evalOf :: LensLike' Eval s a -> Strategy a -> Strategy s Source #

Evaluate the targets of a Lens or Traversal into a data structure according to the given Strategy.

evalTraversable = evalOf traverse = traverse
evalOf = id

evalOf :: Lens' s a -> Strategy a -> Strategy s
evalOf :: Traversal' s a -> Strategy a -> Strategy s
evalOf :: (a -> Eval a) -> s -> Eval s) -> Strategy a -> Strategy s


parOf :: LensLike' Eval s a -> Strategy a -> Strategy s Source #

Evaluate the targets of a Lens or Traversal according into a data structure according to a given Strategy in parallel.

parTraversable = parOf traverse
parOf :: Lens' s a -> Strategy a -> Strategy s
parOf :: Traversal' s a -> Strategy a -> Strategy s
parOf :: ((a -> Eval a) -> s -> Eval s) -> Strategy a -> Strategy s


after :: Strategy s -> LensLike f s t a b -> LensLike f s t a b Source #

Transform a Lens, Fold, Getter, Setter or Traversal to first evaluates its argument according to a given Strategy before proceeding.

after rdeepseq traverse :: Traversable t => Strategy a -> Strategy [a]


throughout :: Strategy s -> LensLike f s t a b -> LensLike f s t a b Source #

Transform a Lens, Fold, Getter, Setter or Traversal to evaluate its argument according to a given Strategy in parallel with evaluating.

throughout rdeepseq traverse :: Traversable t => Strategy a -> Strategy [a]