How to combine data composition and monad transformers

Published: 5/10/2017
How to combine data composition and monad transformers
Source: STACKOVERFLOW.COM

I'm somewhat new to monad transformers, and currently trying to use a StateT/Except stack in a project. The difficulty I'm having is that I have a few layers of data composition (types with operations on them, contained within types that have other operations on them), and I can't figure out how to elegantly use monad transformers in that design. Concretely, I'm having trouble writing the foll

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