My humble implementaion of Build your Own Lisp, which doubly piqued my interest as I have been meaning to brush up on my C and I'm a big fan of Lisps.

I believe I have a little work to do to get this running across all platforms, but on a mac you can build the project with the included makefile by running make. This should drop the executable in the bin dir, and can be run with ./bin/yafl. Run with no args, this will start the yafl REPL. Run with a file, or files, as command line arg(s), it will exexecute the contents.

UPDATE -- I have added a dependecy on clib for pulling in uthash. you can add uthash by running clib install troydhanson/uthash

Also, you will need to instal the MPC parsing library manually as I have removed the source from the repo. The make file expects it in /src/deps.

At the moment, only String and longs are supported. here is some example usage from the repl.

➜  yafl git:(master) ✗ ./bin/yafl
yafl Version 0.0.1
Press CTRL+C to Exit

yafl> (print "the basics")
"the basics"
()
yafl> (+ 1 2)
3
yafl> (> 2 1)
1
yafl> true
1
yafl> false
0
yafl> nil
[]
yafl> (< 2 1)
0
yafl> (head [1 2 3])
{1}
yafl> (eval (head [1 2 3]))
1
yafl> (def [l] [1 2 3])
()
yafl> l
[1 2 3]
yafl> (first l)
1
yafl> (defn [plus x y] [+ x y])
()
yafl> (plus 3 4)
7
yafl> (def {a} 1)
()
yafl> a
1
yafl> (def [boring-func] (\ [in] [print "This is all I do" in]))
()
yafl> (boring-func "for now")
"This is all I do" "for now"
()
yafl> (load "../yafl-hello.yfl")
"hello from a file!!!"
()
yafl>