diff --git a/src/language.rs b/src/language.rs
index c277a84..c76062a 100644
--- a/src/language.rs
+++ b/src/language.rs
@@ -97,22 +97,20 @@ impl<PL, T, A, E> LanguageInterface for (PL, PL::Evaluator) where PL: Programmin
 
 /* below here is new versions of everything */
 
-#[derive(Debug, PartialEq)]
-pub struct EvalStage {
-  index: u8,
-  name: String,
-}
 
+#[derive(Debug)]
 pub struct EvalOptions {
-  debug_stages: Vec<EvalStage>,
+  pub debug_tokens: bool,
+  pub debug_parse: bool,
+  pub debug_type: bool,
+  pub debug_eval: bool,
 }
 
 pub trait ProgrammingLanguageInterface {
-  fn evaluate_in_repl(&mut self, input: &str, eval_options: EvalOptions);
+  fn evaluate_in_repl(&mut self, input: &str, eval_options: EvalOptions) -> Vec<String>;
   fn get_language_name(&self) -> String;
-  fn get_stages(&self) -> Vec<u8>;
 }
 
 pub trait CompileableLanguage : ProgrammingLanguageInterface {
-  fn compile(&mut self);
+  fn compile(&mut self) -> LLVMCodeString;
 }
diff --git a/src/maaru_lang/mod.rs b/src/maaru_lang/mod.rs
index 3666d93..e29beaa 100644
--- a/src/maaru_lang/mod.rs
+++ b/src/maaru_lang/mod.rs
@@ -4,10 +4,64 @@ pub mod parser;
 pub mod eval;
 pub mod compilation;
 
-use language::{ProgrammingLanguage, EvaluationMachine, ParseError, TokenError, LLVMCodeString};
+use language::{ProgrammingLanguageInterface, EvalOptions, ProgrammingLanguage, EvaluationMachine, ParseError, TokenError, LLVMCodeString};
 
 pub use self::eval::Evaluator as MaaruEvaluator;
 
+pub struct NewMaaru<'a> {
+  evaluator: MaaruEvaluator<'a>
+}
+
+impl<'a> NewMaaru<'a> {
+  fn new() -> NewMaaru<'a> {
+    NewMaaru {
+      evaluator: MaaruEvaluator::new(None),
+    }
+  }
+}
+
+impl<'a> ProgrammingLanguageInterface for NewMaaru<'a> {
+  fn get_language_name(&self) -> String {
+    "Maaru".to_string()
+  }
+
+  fn evaluate_in_repl(&mut self, input: &str, options: EvalOptions) -> Vec<String> {
+    let mut output = vec![];
+    let tokens = match tokenizer::tokenize(input) {
+      Ok(tokens) => {
+        if options.debug_tokens {
+          output.push(format!("{:?}", tokens));
+        }
+        tokens
+      },
+      Err(err) => {
+        let msg = format!("Tokenization error: {:?}\n", err.msg);
+        output.push(msg);
+        return output;
+      }
+    };
+
+    let ast = match parser::parse(&tokens, &[]) {
+      Ok(ast) => {
+        if options.debug_parse {
+          output.push(format!("{:?}", ast));
+        }
+        ast
+      },
+      Err(err) => {
+        let msg = format!("Parse error: {:?}\n", err.msg);
+        output.push(msg);
+        return output;
+      }
+    };
+
+    let evaluation_output = self.evaluator.run(ast);
+    output.extend(evaluation_output);
+
+    return output;
+  }
+}
+
 pub struct Maaru<'a> { marker: PhantomData<&'a ()> }
 impl<'a> Maaru<'a> {
     pub fn new() -> Maaru <'a> {