type-equality

Data.Type.Equality compat package

https://github.com/hesselink/type-equality

Version on this page:1.0.1
LTS Haskell 24.16:1.0.1@rev:1
Stackage Nightly 2025-10-25:1.0.1@rev:1
Latest on Hackage:1.0.1@rev:1

See all snapshots type-equality appears in

BSD-3-Clause licensed by Oleg Grenrus, Ryan Scott, Erik Hesselink, Martijn van Steenbergen
Maintained by Oleg Grenrus, Ryan Scott, Erik Hesselink
This version can be pinned in stack with:type-equality-1.0.1@sha256:2db7022b5487c020b353448477ac496f11e64e8d485fd3e8727290d36756e0c4,1390

Module documentation for 1.0.1

Depends on 1 package(full list with versions):
base

This library defines a propositional equality data type, shims Data.Type.Equality as well as possible for older GHCs (< 7.8).

data a :~: b where
    Refl :: a :~: a

The module Data.Type.Equality.Hetero shims :~~: equality, for compilers with PolyKinds

Changes

1.0.1

  • Support GHC-8.6.5..GHC-9.10.1

1

  • Rewrite the library to contain a shim of recent base Data.Type.Equality module.

0.1.2

  • Add subst2. Thanks to James Koppel.

0.1.1

  • Turn on PolyKinds for GHC >= 7.6. Thanks to Ben Franksen.

0.1.0.2

  • Move ‘Build-depends’ to ‘Library’ section. Thanks to Brent Yorgey.

0.1.0.1

  • Added EqT instance for (:=:)
  • Removed ‘cast’ as synonym for ‘coerce’.
  • Show and read instances for (:=:).
  • Lots of small changes.

0.1.0

  • Initial version.