Starting to move debug options around

+ add method to ProgrammingLanguageInterface that is a list of stages

schala-repl/src/language.rs

@@ -169,6 +169,9 @@ pub trait ProgrammingLanguageInterface {
 
   fn get_language_name(&self) -> String;
   fn get_source_file_suffix(&self) -> String;
+  fn get_stages(&self) -> Vec<String> {
+    vec![]
+  }
   fn handle_custom_interpreter_directives(&mut self, _commands: &Vec<&str>) -> Option<String> {
     None
   }

schala-repl/src/lib.rs

@@ -277,7 +277,26 @@ impl Repl {
         writeln!(buf, "{}", lang.custom_interpreter_directives_help()).unwrap();
         Some(buf)
       },
-      "debug" => {
+      "debug" => self.handle_debug(commands),
+      e => self.languages[self.current_language_index]
+        .handle_custom_interpreter_directives(&commands)
+        .or(Some(format!("Unknown command: {}", e)))
+    }
+  }
+  fn handle_debug(&mut self, commands: Vec<&str>) -> Option<String> {
+    match commands.get(1) {
+      b @ Some(&"show") | b @ Some(&"hide") => {
+        let show = b == Some(&"show");
+        let debug_stage = match commands.get(2) {
+          Some(s) => s,
+          None => return Some(format!("Must specify a stage to debug")),
+        };
+        None
+      },
+      _ => Some(format!("Unknown debug command"))
+    }
+      /*
+       * {
         let show = match commands.get(1) {
           Some(&"show") => true,
           Some(&"hide") => false,
@@ -299,6 +318,9 @@ impl Repl {
         };
         None
       },
+
+      AND DEBUG OPTIONS
+
       "options" => {
         let ref d = self.options.debug;
         let tokens = if d.tokens { "true".green() } else { "false".red() };
@@ -308,10 +330,8 @@ impl Repl {
         Some(format!(r#"Debug:
 tokens: {}, parse: {}, ast: {}, symbols: {}"#, tokens, parse_tree, ast, symbol_table))
       },
-      e => self.languages[self.current_language_index]
-        .handle_custom_interpreter_directives(&commands)
-        .or(Some(format!("Unknown command: {}", e)))
-    }
+
+      */
   }
 }