Start adding commandtree abstraction

schala-repl/src/repl/mod.rs

@@ -93,7 +93,33 @@ impl Repl {
   }
 
   fn handle_interpreter_directive(&mut self, input: &str) -> Option<String> {
-    Some(format!("you typed {}, which is unsupported", input))
+    let mut iter = input.chars();
+    iter.next();
+    let commands: Vec<&str> = iter
+      .as_str()
+      .split_whitespace()
+      .collect();
+
+    if commands.len() < 1 {
+      return None;
+    }
+
+    let directives = self.get_directives();
+
+    let mut dir_pointer: &CommandTree = &directives;
+    for command in commands.iter() {
+      match dir_pointer {
+        CommandTree::Top(subcommands) | CommandTree::NonTerminal { children: subcommands, .. } => {
+          let q = subcommands;
+
+
+        },
+        CommandTree::Terminal { name, .. } => {
+
+        }
+      }
+    }
+    Some(format!("you typed {:?}", commands))
   }
 
   fn get_cur_language_state(&mut self) -> &mut Box<ProgrammingLanguageInterface> {
@@ -141,7 +167,10 @@ impl Repl {
       */
 
     CommandTree::Top(vec![
-      CommandTree::term("exit", Some("exit the REPL")),
+      CommandTree::term_with_function("exit", Some("exit the REPL"), Box::new(|repl: &mut Repl, cmds: Vec<String>| {
+        repl.save_before_exit();
+        ::std::process::exit(0)
+      })),
       CommandTree::term_with_function("quit", Some("exit the REPL"), Box::new(|repl: &mut Repl, cmds: Vec<String>| {
         repl.save_before_exit();
         ::std::process::exit(0)