Three Layer Haskell Cake
Three Layer Haskell Cake is the blog post by Matthew Parsons explaining one of the widely used Haskell application architectures using monad transformers, mtl and ReaderT.
We design our application in three layers.
- Layer 1 is low-level and uses
ReaderTto hold our application state.
- Layer 3 contains the actual business logic, with pure functions (no IO)
- Layer 2 glues the two layers together using