[blu42]

Ha! If I only knew about 'Build Your Own Lisp' three months ago!

I needed a simple language as a vehicle for a compiler talk I'm preparing for this summer, so I hacked along an extremely reduced LISP (a 'Non-LISP', as I call it), whose C++ implementation from scratch came out at about 1K -- 1.2K LOC with the AST optimizations I meant to demonstrate for the talk. Self-contained code here -- no libs or (much) STL: https://github.com/blu/tinl

OP, thank you for sharing Tim Morgan's work -- it's a work of love!

[e12e]

> whose C++ implementation from scratch...

You're aware of clasp?

https://github.com/clasp-developers/clasp

Which builds (in part) on embeddable common lisp:

https://gitlab.com/embeddable-common-lisp/ecl

See around 20-30 minutes: https://youtu.be/8X69_42Mj-g

[blu42]

Nope, I'm seeing clasp for the first time -- Christian Schafmeister's talk was extremely nice to listen to!

I did come across some small LISP implementations at the early stages, but by that time I already had the AST builder done. Maybe because I didn't actively search for LISP implementations, as I didn't need a 'proper' LISP per se, more of a DSL for quickly writing ASTs of arbitrary complex computational expressions. Those ASTs were the final goal ; )