Schemer is (for lack of a better name) my implimentation of Write Yourself a Scheme in 48 Hours (WYS48H) using Stack. WYS48H is a tutorial in Haskell that teaches you to build an interpreter for Scheme.
Only some of the exercises are completed.
First clone the repo. Then, like any Stack project all you have to do to build is run
stack buildWARNING: This project is only mostly complete. Running it may not have to result you expect.
I told stack to call the executable schemer so to run it just type
stack exec schemerMost of the code is in Lib.hs but there is a little bit
of relevant stuff to be found in Main.hs.
I tried to modularize a lot of the code with some success. All of the
error handling stuff is in src/Error.hs. Parsing stuff
resides in src/Parse.hs. The basic data type for the
abstract syntax tree is in src/AST.hs along with a helper
function for which I was to lazy to make a Util.hs module. Finally
src/Eval.hs contains all of the nitty gritty details for
evaluating the AST and executing the Scheme.
Also app/Main.hs has all of the IO related code that
runs the actual interpreter.