"NAIL is a LISP" NAIL is a small, minimal LISP written in the GNU '99 standard of C. It's interpreted, untyped, uses symbol literals to proxy references, and still has a few bugs. It was written as a student project rather than anything of practical use; if I had wanted that, I would've written it in a nice language that doesn't segfault, like Rust or Haskell.
#Syntax/Usage
- Number literals (
123) - String literals (
"Hello world!") - Symbols (
foo,+,lambda) - Lists (
(+ 1 2 3),(1 2 3)) - Zilch (
zilch) Any of the above can be quoted to defer evaluation.
lambda and \ declare anonymous functions.
Constructors for functions take the following arguments:
(cons-name (arg1 ... argN) codetoevaluate)
(def name arglist code) is equivalent to (set! name (lambda arglist code))
macro declares a macro.
Macros are simply functions that don't evaluate their input.
If you still want to do that, just later, then use eval!
defmacro is to macro as def is to lambda.
#Standard library
Right now, it's a little undersized, and honestly it probably will remain that way.
We have the common arithmetic operators, and the list trio, head, tail, and cons.
There is also list, which constructs a list by evaluating its arguments.