0.1.0 base collection of features

Implemented evaluation of tree calculus terms alongside referentially
transparent variable identifiers. Implemented evaluation of defined
functions into tree calculus.

src/Main.hs

@@ -5,7 +5,8 @@ import Lexer
 import Parser
 import Research
 
+import Data.Map as Map
 import Text.Megaparsec (runParser)
 
 main :: IO ()
-main = putStr $ show $ parseSapling "false = t"
+main = putStr $ show $ result $ evalMulti Map.empty (parseMulti "false = t\nnot = t (t (t t) (t t t)) t\ntrue = not false\ntrue")