Merge pull request kkawakam#710 from segeljakt/derive-default-history-hinter

Add `HistoryHinter::default()` and `HistoryHinter::new()`

Author: gwenn

examples/custom_key_bindings.rs

@@ -87,7 +87,7 @@ impl ConditionalEventHandler for TabEventHandler {
 
 fn main() -> Result<()> {
     let mut rl = Editor::<MyHelper, DefaultHistory>::new()?;
-    rl.set_helper(Some(MyHelper(HistoryHinter {})));
+    rl.set_helper(Some(MyHelper(HistoryHinter::new())));
 
     let ceh = Box::new(CompleteHintHandler);
     rl.bind_sequence(KeyEvent::ctrl('E'), EventHandler::Conditional(ceh.clone()));

examples/example.rs

@@ -58,7 +58,7 @@ fn main() -> rustyline::Result<()> {
     let h = MyHelper {
         completer: FilenameCompleter::new(),
         highlighter: MatchingBracketHighlighter::new(),
-        hinter: HistoryHinter {},
+        hinter: HistoryHinter::new(),
         colored_prompt: "".to_owned(),
         validator: MatchingBracketValidator::new(),
     };

src/hint.rs

@@ -50,8 +50,16 @@ impl<'r, H: ?Sized + Hinter> Hinter for &'r H {
 
 /// Add suggestion based on previous history entries matching current user
 /// input.
+#[derive(Default)]
 pub struct HistoryHinter {}
 
+impl HistoryHinter {
+    /// Create a new `HistoryHinter`
+    pub fn new() -> HistoryHinter {
+        HistoryHinter::default()
+    }
+}
+
 impl Hinter for HistoryHinter {
     type Hint = String;