Help function work

schala-repl/src/repl/directive_actions.rs

@@ -1,4 +1,5 @@
 use super::{Repl, InterpreterDirectiveOutput};
+use crate::repl::command_tree::CommandTree;
 use crate::language::{LangMetaRequest, LangMetaResponse, DebugAsk, DebugResponse}; 
 use itertools::Itertools;
 use std::fmt::Write as FmtWrite;
@@ -24,7 +25,7 @@ impl DirectiveAction {
     use DirectiveAction::*;
     match self {
       Null => None,
-      Help => Some(repl.print_help_message(arguments)),
+      Help => help(repl, arguments),
       QuitProgram => {
         repl.save_before_exit();
         ::std::process::exit(0)
@@ -122,3 +123,32 @@ fn doc(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
     }
   }).unwrap_or(Some(format!(":docs needs an argument")))
 }
+
+fn help(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
+  let mut buf = String::new();
+  let directives = match repl.get_directives() {
+    CommandTree::Top(children) => children,
+    _ => panic!("Top-level CommandTree not Top")
+  };
+
+  match arguments {
+    [] => {
+      writeln!(buf, "MetaInterpreter options").unwrap();
+      writeln!(buf, "-----------------------").unwrap();
+
+      for directive in directives {
+        let trailer = " ";
+        writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
+      }
+
+      let ref lang = repl.get_cur_language_state();
+      writeln!(buf, "").unwrap();
+      writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
+      writeln!(buf, "-----------------------").unwrap();
+    },
+    _ => {
+      writeln!(buf, "Command-specific help not available yet").unwrap();
+    }
+  };
+  Some(buf)
+}

schala-repl/src/repl/mod.rs

@@ -1,4 +1,3 @@
-use std::fmt::Write as FmtWrite;
 use std::sync::Arc;
 use std::collections::HashSet;
 
@@ -120,35 +119,6 @@ impl Repl {
     directives.perform(self, &arguments)
   }
 
-  fn print_help_message(&mut self, commands_passed_to_help: &[&str] ) -> String {
-    let mut buf = String::new();
-    let directives = match self.get_directives() {
-      CommandTree::Top(children) => children,
-      _ => panic!("Top-level CommandTree not Top")
-    };
-
-    match commands_passed_to_help {
-      [] => {
-        writeln!(buf, "MetaInterpreter options").unwrap();
-        writeln!(buf, "-----------------------").unwrap();
-
-        for directive in directives {
-          let trailer = " ";
-          writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
-        }
-
-        let ref lang = self.get_cur_language_state();
-        writeln!(buf, "").unwrap();
-        writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
-        writeln!(buf, "-----------------------").unwrap();
-      },
-      _ => {
-        writeln!(buf, "Command-specific help not available yet").unwrap();
-      }
-    };
-    buf
-  }
-
   fn get_cur_language_state(&mut self) -> &mut Box<ProgrammingLanguageInterface> {
     //TODO this is obviously not complete
     &mut self.language_states[0]