singleton-bool

Type level booleans

https://github.com/phadej/singleton-bool#readme

Version on this page:0.1.7
LTS Haskell 24.24:0.1.8@rev:1
Stackage Nightly 2025-12-18:0.1.8@rev:1
Latest on Hackage:0.1.8@rev:1

See all snapshots singleton-bool appears in

BSD-3-Clause licensed and maintained by Oleg Grenrus
This version can be pinned in stack with:singleton-bool-0.1.7@sha256:9a40d2fb29e7ac8821846eb3d53aedb1118ff63e4428b16fb30a91d96a899e1f,1232

Module documentation for 0.1.7

Depends on 5 packages(full list with versions):
base, boring, dec, deepseq, some
Used by 4 packages in nightly-2023-09-22(full list with versions):
cabal-plan, servant, servant-openapi3, servant-swagger

Type level booleans.

singletons package provides similar functionality, but it has tight dependency constraints.

Changes

  • 0.1.7

    • Add EqP and OrdP instances

  • 0.1.6

    • Add boring instances
    • Add some (GEq etc) instances
    • Add deepseq instances
    • Require GHC-7.8+

  • 0.1.5

    • Add discreteBool :: Dec (a :~: b) (GHC-7.8+)
    • Add Show, Eq, Ord SBool b instances.

  • 0.1.4

    • Add fromSBool and withSomeSBool.

  • 0.1.3.0

    • Add reifyBool and reflectBool.
    • Drop GHC-7.4 support (broken PolyKinds)

  • 0.1.2.0

    • Enable PolyKinds on GHC >= 7.6
    • Add sboolEqRefl :: SBoolI (a == b) => Maybe (a :~: b)

  • 0.1.1.0

    • Add eqToRefl, eqCast, trivialRefl