Algebraic effect handlers offer an alternative to monads to incorporate
\neffects in Haskell. In recent work Xie _et al._ show how to give
\nsemantics to effect handlers in terms of plain polymorphic lambda
\ncalculus through _evidence translation_. Besides giving precise
\nsemantics, this translation also allows for potentially more efficient
\nimplementations. Here we present the first implementation of this
\ntechnique as a library for effect handlers in Haskell. We show how the
\ndesign naturally leads to a concise effect interface and how evidence
\ntranslation enables evaluating _tail resumptive_ operations _in-place_.
\nWe give detailed benchmark results where our library performs well with
\nrespect to other approaches.<\/p>\n","protected":false},"excerpt":{"rendered":"
Algebraic effect handlers offer an alternative to monads to incorporate effects in Haskell. In recent work Xie _et al._ show how to give semantics to effect handlers in terms of plain polymorphic lambda calculus through _evidence translation_. Besides giving precise semantics, this translation also allows for potentially more efficient implementations. 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