Most of the features are inspired by racket (we've never used a LISP before starting the project, and a friend of mine suggested to use it). Right now we have: - Numbers (rationals) and arithmetic operations - Strings and some basic operations like split and concatenation - Error raising/handling via the raise and call-with-error-handler special forms - Anonymous (via fn) and named (via defn) functions, both single-arity, variadic, and multi-arity - Definitions via the def special form (replaces the whole reference in the variable table) - Local definitions via the let special form - Mutation via the set! special form (gets the reference, replaces its value) - Local state mutation via a combination of let + set! - A simple macro system that only handles basic variable replacing and spreading of lists - cons/car/cdr as it's a LISP after all - Boolean operators and a `if` special form - A simple import system that we're working on right now
There are some examples of functions built with the language inside the `std/` folder, I've created `map`, `filter`, `foldl`, `foldr`, and a mutable list using the functions, and `or`, `and` and `guard` macros using the macro system.