oset: An insertion-order-preserving set

[ command-line, library, mit, program ] [ Propose Tags ]

This package provides OSet, an insertion-order-preserving set, with type class instances for Foldable and Data as well as wrappers, OSetL and OSetR, with left- and right-biased instances of Semigroup and Monoid respectively.

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Dependencies base (>=4.9 && <4.13), containers (>=0.5.8 && <0.7), oset [details]
License MIT
Copyright 2019 Richard Cook
Author Richard Cook
Maintainer rcook@rcook.org
Category Command Line
Home page https://github.com/rcook/oset#readme
Uploaded by rcook at 2019-02-09T16:21:24Z
Executables oset-app
Downloads 2409 total (5 in the last 30 days)
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Readme for oset-

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Travis branch Hackage GitHub license


An insertion-order-preserving set

  • Mostly API-compatible with OSet ordered-containers
  • Adds class instance for Data
  • Adds class instances for Semigroup and Monoid via OSetL and OSetR wrappers

Incompatibilities with OSet from ordered-containers

  • fromList is renamed fromListL
  • fromListR is introduced by analogy with fromListL


View documentation on Hackage


MIT License