Extensible type-safe unions

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LTS Haskell 14.27:0.1.2@rev:4
Stackage Nightly 2021-07-23:0.1.2@rev:6
Latest on Hackage:0.1.2@rev:6

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BSD-3-Clause licensed by Vladislav Zavialov
Maintained by Vladislav Zavialov
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Used by 1 package in lts-11.22(full list with versions):

Extensible type-safe unions for Haskell with prisms using modern GHC features. Dual to vinyl records. Unions are also known as corecords or polymorphic variants. Neither requires a Typeable constraint nor uses unsafe coercions at the cost of linear time access (negligible in practice).