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Monthly Downloads: 8
Programming language: Haskell
License: BSD 2-clause "Simplified" License
Tags: Lenses     Optics    
Latest version: v0.1.0.0

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README

Usage

Simply import Optics.Polysemy. This serves as a drop-in replacement for Optics, Optics.State, and Optics.State.Operators.

Caveats

As best I can tell, the zoom functions cannot currently be translated with complete precision. As a result, only a few zoom functions are present here, and they behave a little strangely.

  • If you use zoom or zoomMaybe to go from State s to State a, the original State s will still be present in your effect stack. Writes to the zoomed part of the s will be visible from inside the State a, and vice-versa.
  • zoomMany cannot be sensibly implemented this way, so I have left it out.
  • Due to difficulties with higher-order effects, I have not yet found a way to implement the magnify functions.