diff --git a/src/highlight.rs b/src/highlight.rs
index 8e9c972..eee97ff 100644
--- a/src/highlight.rs
+++ b/src/highlight.rs
@@ -3,12 +3,18 @@
 
 /// Syntax highlighter with [ansi color](https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters).
 /// Rustyline will try to handle escape sequence for ansi color on windows
-/// when not supported natively (windows <10). TODO to be used
+/// when not supported natively (windows <10).
+///
+/// TODO to be used
 pub trait Highlighter {
-    /// Takes the currently edited `line` with the cursor `_pos`ition and
-    /// returns the highlighted version (with ANSI color).
-    fn highlight<'l>(&self, line: &'l str, _pos: usize) -> Cow<'l, str> {
-        Borrowed(line)
+    /// Takes the currently edited `line` with the cursor `pos`ition and
+    /// returns the highlighted version (with ANSI color)
+    /// and new cursor position which may have been shifted by highlighting.
+    ///
+    /// For example, you can implement
+    /// [blink-matching-paren](https://www.gnu.org/software/bash/manual/html_node/Readline-Init-File-Syntax.html).
+    fn highlight<'l>(&self, line: &'l str, pos: usize) -> (Cow<'l, str>, usize) {
+        (Borrowed(line), pos)
     }
     /// Takes the `prompt` and
     /// returns the highlighted version (with ANSI color).
@@ -22,7 +28,7 @@
     }
     /// Takes the completion `canditate` and
     /// returns the highlighted version (with ANSI color).
-    fn highlight_canidate<'c>(&self, candidate: &'c str) -> Cow<'c, str> {
+    fn highlight_candidate<'c>(&self, candidate: &'c str) -> Cow<'c, str> {
         Borrowed(candidate)
     }
 }