Smalltalk like programming language

A research programming language on top of C macros

Algebraic data types for C99

Functional Programming Unorthodoxly Adjusted to Client-/Server-side Javascript

Fastest and simplest pattern matching sum types in Go. Don't be jealous of Rust anymore.

PrimeFuncPack Core.Taggeds is a core pack for .NET consisting of fundamental tagged types targeted for use in functional programming: Optional and Result monads, Tagged Union, as well as the convert extensions.

A library for defining and manipulating algebraic data types in TypeScript.

Single header C library for type safe tagged unions

Lightweight state machines in TypeScript

JTUG - JSON Tagged Union Go

Small TS library to type and safely handle `serde` JSON serializations of Rust enums.

Tagged unions for Elixir. Just that.

Base software building blocks: Algebraic types (aka sumtype/tagged union/variant), universal reflection API, basic math, and more.

A dead simple library for parsing discriminated unions in Go.

An example of tagged unions and exhaustive pattern matches in Go

Type-safe functional tools for Python.

.NET port of Francisco (Paco) Estévez's JavaSealedUnions (https://github.com/pakoito/JavaSealedUnions).

Advanced converters for the System.Text.Json serializer

Helps to easily JSON marshal / unmarshal tagged unions in go

Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.