optics-core-0.3: Optics as an abstract interface: core definitions

Safe HaskellNone
LanguageHaskell2010

Data.Tree.Optics

Description

This module defines optics for manipulating Trees.

Synopsis

Documentation

root :: Lens' (Tree a) a Source #

A Lens that focuses on the root of a Tree.

>>> view root $ Node 42 []
42

branches :: Lens' (Tree a) [Tree a] Source #

A Lens returning the direct descendants of the root of a Tree

view branches ≡ subForest