7 days ago
- Common Lisp macros are used to implement a minimalist Forth interpreter, demonstrating macro power and flexibility.
- Forth's key concepts—abstract registers, threaded code, immediacy (compile-time execution), and dictionary—are implemented using Lisp data structures and metaprogramming.
- The chapter emphasizes 'duality of syntax': the ability to change program semantics with minimal code modifications, a core advantage of macros.
- Forth's threaded code allows transparent control over compilation, enabling features like tail calls, recursion, and custom control structures (if/then, begin/again).