The dual-tree package
Rose (n-ary) trees with both upwards- (i.e. cached) and downwards-traveling (i.e. accumulating) monoidal annotations. This is used as the core data structure underlying the diagrams framework (http://projects.haskell.org/diagrams), but potentially has other applications as well.
Abstractly, a DUALTree is a rose (n-ary) tree with data (of type l) at leaves, data (of type a) at internal nodes, and two types of monoidal annotations, one (of type u) travelling "up" the tree and one (of type d) traveling "down".
See Data.Tree.DUAL for full documentation. Data.Tree.DUAL provides a public API which should suffice for most purposes. Data.Tree.DUAL.Internal exports more of the internal implementation---use it at your own risk.
|Versions||0.1.0.0, 0.1.0.1, 0.1.0.2, 0.1.0.3, 0.1.0.4, 0.1.0.5, 0.2, 0.2.0.1, 0.2.0.2, 0.2.0.3, 0.2.0.4|
|Dependencies||base (>=4.3 && <4.8), monoid-extras (>=0.2 && <0.4), newtype (==0.2.*), semigroups (>=0.8 && <0.15)|
|Source repository||head: git clone https://github.com/diagrams/dual-tree.git|
|Upload date||Thu May 15 19:16:35 UTC 2014|
|Downloads||15174 total (1136 in last 30 days)|
- dual-tree-0.2.0.3.tar.gz [browse] (Cabal source package)
- Package description (included in the package)
For package maintainers and hackage trustees