Type-machine: Using Template Haskell for Record Structure Derivation and Structural Subtyping in Haskell
By
todsacerdoti
Baker's choice. Dense with flavour, light on filler.
Summary
The article discusses Type-machine, a Haskell library that uses Template Haskell to derive record structures and simulate structural subtyping. It addresses the limitations of Haskell's traditional record syntax, particularly the pain of working with many fields in data types, and presents a solution that improves field selection and manipulation through automated code generation.
Key quotes
· 4 pulledIn Haskell, we usually model data using algebraic data types
When data types have many fields, it becomes a bit of a pain to select them
Thankfully, in GHC 7.4.1 was introduced the record syntax
Using Template Haskell to derive the structure of records and simulate structural subtyping
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