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Morph User Guide

Utilities

• 1 Curried Functions
• 2 Generic Mapping with Functors

Working with Monads

• 3 Error Handling with Maybe
• 4 Error Handling with Either
• 5 Modeling Global Data
• 6 Output Side Effects from Pure Functions
• 7 Modeling Access to Global State
• 8 Simpler State with Error-Handling

Working with Monad Transformers

• 9 Composing Monads

Tutorials

• 10 Writing a Simple Parser - Defines a custom monad for sequencing calls to parsers.

Source Files in src/main/resources:

• Usage for the StateT monad transformer
• Example using a StateT with Either results
• Usage for the WriterT monad transformer
• Example using a WriterT with State results