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Learn how OCaml’s Generalized Algebraic Data Types let you encode type‑level invariants in a DSL, with a concrete example, trade‑offs, and a step‑by‑step guide to getting started.
GADTs let Haskell programmers encode per‑constructor type refinements, catching impossible patterns at compile time. This blog walks through a typed expression tree example, highlights trade‑offs, and gives actionable steps to adopt GADTs in your codebase.
ocaml
haskell