boring

Boring and Absurd types

https://github.com/phadej/boring

Version on this page:0.2.1
LTS Haskell 24.18:0.2.2@rev:1
Stackage Nightly 2025-11-04:0.2.2@rev:1
Latest on Hackage:0.2.2@rev:1

See all snapshots boring appears in

BSD-3-Clause licensed by Oleg Grenrus
Maintained by Oleg.Grenrus
This version can be pinned in stack with:boring-0.2.1@sha256:8c79a8aaaef562f2d20ada462e1498ed962a7a76072acd2a06ddb61d23229ee4,2087

Module documentation for 0.2.1

Used by 7 packages in nightly-2023-10-09(full list with versions):
bin, dec, fin, ral, singleton-bool, streams, vec

  • Boring types are isomorphic to ().

  • Absurd types are isomorphic to Void.

See What does () mean in Haskell -answer by Conor McBride

Changes

Revision history for boring

0.2.1

  • Add instances for SNat, SSymbol, and SChar (singletons introduced in base-4.18.0.0)

0.2

  • Make boring package dependency light. fin, bin, ral, vec, dec, singleton-bool instances are migrated to corresponding packages. Rest are migrated to boring-instances for now.
  • Data.Boring is Trustworthy
  • Add Generic derivation. Thanks to David Feuer.

0.1.3

  • Allow vec-0.3
  • Add instances for ral and bin types.

0.1.2

  • Add instances for ‘Boring’ instances for ‘SBool’, ‘SNat’ and ‘LE’.
  • Add ‘Boring (Dec a)’, ‘boringYes’ and ‘boringNo’.

0.1.1

  • Add GHC.Generics instances
  • Add :~~: and Coercion instances

0.1

  • streams, constraints, generics-sop instances.
  • Reversed dependency with vec, add fin instances.

0

  • First version. Released on an unsuspecting world.