Implementing a functional language with graph reduction (2021)

49 Bogdanp 5 7/25/2025, 5:20:20 PM thma.github.io ↗

Comments (5)

tromp · 23h ago
A similar implementation of a large subset of Haskell was done by Ben Lynn in a winning IOCCC entry as described at [1]. The graph reduction engine is the small C programs shown in [2].

A much larger and more production-ready implementation of Haskell into combinatory logic was made by Lennart Augustsson [3].

[1] https://crypto.stanford.edu/~blynn/compiler/

[2] https://crypto.stanford.edu/~blynn/compiler/c.html

[3] https://github.com/augustss/MicroHs

enricozb · 12h ago
Interaction nets are another computational model based on graph-reduction.

https://ezb.io/thoughts/interaction_nets/lambda_calculus/202...

throwaway81523 · 12h ago
SPJ's book about the same topic is very good.

https://simon.peytonjones.org/slpj-book-1987/

taliesinb · 23h ago
Given that whole name binding thing is ultimately a story of how to describe a graph using a tree, I was primed to look for monoidal category-ish things, and sure enough the S and K combinators look very much like copy and delete operators; counit and comultiplication for a comonoid. That’s very vibe-based, anyone know of a formal version of this observation?
ThyerMJ26 · 53m ago
The author's previous post goes into details of a categorial connection:

  λ-Calculus, Combinatory Logic and Cartesian Closed Categories
  https://thma.github.io/posts/2021-04-04-Lambda-Calculus-Combinatory-Logic-and-Cartesian-Closed-Categories.html
Also, more in-depth:

  Categorical combinators, P.-L. Curien
  https://www.sciencedirect.com/science/article/pii/S001999588680047X
(or maybe you're looking for something beyond that)