tree-traversals: Functions and newtype wrappers for traversing Trees

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The tree-traversals package defines in-order, pre-order, post-order, level-order, and reversed level-order traversals for tree-like types:

inorder, preorder, postorder, levelorder, rlevelorder
  :: (TreeLike tree, Applicative f) => (a -> f b) -> tree a -> f (tree b)

The package also provides newtype wrappers for the various traversals so they may be used with traverse, i.e.

traverse f (InOrder tree) = inorder f tree
traverse f (PreOrder tree) = preorder f tree
traverse f (PostOrder tree) = postorder f tree
traverse f (LevelOrder tree) = levelorder f tree
traverse f (RLevelOrder tree) = rlevelorder f tree

To implement the various orders, the tree-traversals package provides the Control.Applicative.Phases.Phases applicative transformer for organizing effects into distinct phases.

Instances of Data.Traversable.TreeLike.TreeLike are provided for rose trees (Data.Tree.Tree), binary trees (Data.BinaryTree.BinaryTree), forests (Data.Traversable.TreeLike.Forest), and algebraic combinations of trees (Data.Functor.Compose.Compose outerTree innerTree, Data.Functor.Product fstTree sndTree, Data.Functor.Sum leftTree rightTree).

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Properties

Versions	0.1.0.0, 0.1.1.0, 0.1.1.0, 0.1.2.0, 0.1.3.0
Change log	ChangeLog.md
Dependencies	base (>=4.10 && <4.13), containers [details]
License	CC0-1.0
Author	Noah Luck Easterly
Maintainer	noah.easterly@gmail.com
Category	Data
Home page	https://github.com/rampion/tree-traversals
Source repo	head: git clone git://github.com/rampion/tree-traversals.git this: git clone git://github.com/rampion/tree-traversals.git(tag v0.1.0.0)
Uploaded	by NoahEasterly at 2019-12-11T22:58:38Z

Modules

[Index] [Quick Jump]

Control
- Applicative
  - Control.Applicative.Phases
Data
- Data.BinaryTree
- Monoid
  - Data.Monoid.TreeDiagram
- Traversable
  - Data.Traversable.TreeLike

Flags

Manual Flags

Name	Description	Default
development	Enable all warnings and upgrade warnings to errors	Disabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

tree-traversals-0.1.1.0.tar.gz [browse] (Cabal source package)
Package description (as included in the package)

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Package maintainers

NoahEasterly

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Readme for tree-traversals-0.1.1.0

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The tree-traversals package defines in-order, pre-order, post-order, level-order, and reversed level-order traversals for tree-like types:

inorder, preorder, postorder, levelorder, rlevelorder
  :: (TreeLike tree, Applicative f) => (a -> f b) -> tree a -> f (tree b)

The package also provides newtype wrappers for the various traversals so they may be used with traverse, i.e.

traverse f (InOrder tree) = inorder f tree
traverse f (PreOrder tree) = preorder f tree
traverse f (PostOrder tree) = postorder f tree
traverse f (LevelOrder tree) = levelorder f tree
traverse f (RLevelOrder tree) = rlevelorder f tree

To implement the various orders, the tree-traversals package provides the Phases applicative transformer for organizing effects into distinct phases.

Instances of TreeLike are provided for rose trees (Tree from Data.Tree), binary trees (BinaryTree from this package's Data.BinaryTree), forests (Forest from this package's Data.Traversable.TreeLike), and algebraic combinations of trees (Compose outerTree innerTree, Product fstTree sndTree, Sum leftTree rightTree).