optics-core-0.4.1: Optics as an abstract interface: core definitions
Safe Haskell None
Language Haskell2010

Data.Tree.Optics

Description

This module defines optics for manipulating Tree s.

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