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Bluefin, a new effect system (discourse.haskell.org)

submitted 4 months ago by [email protected] to c/[email protected]

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I've mentioned my new effect system, Bluefin, a few times on this forum. It's now ready for me to announce it more formally.

Bluefin's API is differs from all prior effect systems in that it implements a "well typed Handle/Services pattern". That is, all effects are accessed through value-level handles, which makes it trivial to mix a wide variety of effects, including:

Bluefin.EarlyReturn, for early return
Bluefin.Exception, for exceptions
Bluefin.IO, for I/O
Bluefin.State, for mutable state
Bluefin.Stream, for streams

If you're interested then read the Introduction to Bluefin. I'd love to know what you all think.

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