this post was submitted on 24 Sep 2026
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Programming

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Moggi - a statically typed, purely functional language on JVM, .NET & PHP (github.com)
submitted 3 weeks ago by prolic@programming.dev to c/programming@programming.dev
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https://github.com/moggi-lang/moggi/

Moggi is a statically typed, purely functional programming language with strict evaluation. It has algebraic data types, GADTs, pattern matching, type classes, type inference, Generic Deriving, and an IO monad. It targets the JVM, .NET, and PHP, with typed FFI for existing Java, .NET, and PHP libraries.

The first release also includes a REPL, LSP, VS Code extension, moogle (code search), mogdoc (documentation generation), and a growing standard library.

This is an alpha release: the language and APIs are still evolving, and the standard library is still a work in progress.

I'd particularly like feedback from people interested in functional languages, type systems, compilers, and language/runtime interoperability.

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[โ€“] dneaves@lemmy.world 1 points 3 weeks ago (1 children)

Well it looks 99% like Haskell, but compiles to JVM, .NET, and PHP. And otherwise seems very "Haskell at home", with moogle (instead of hoogle), and mogdoc (instead of haddock).

Not to diminish any work you did do, but I do think a Haskell -> JVM/.NET/PHP compiler might have done what you aimed for and easier.

[โ€“] anton@lemmy.blahaj.zone 1 points 2 weeks ago

I think it's because of Lazy evaluation. It's essential to Haskell, but hard to graft onto another platform while having good performance.