O'Haskell

O'Haskell is Haskell conservatively extended with static subtyping and monadic objects. O'Haskell last saw a release in 2001, and has reportedly been superseded by Timber.

• O'Haskell, as archived by the Wayback Machine
• A survey of O'Haskell
• Source code for O'Haskell
• Timber
• Haskell's overlooked object system (PDF) -- Object oriented concepts in pure Haskell.

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