1 files changed, 19 insertions, 0 deletions
diff --git a/src/rope.rs b/src/rope.rs
index 31c3296..737d949 100644
--- a/src/rope.rs
+++ b/src/rope.rs
@@ -355,4 +355,23 @@ impl Rope {
             }
         }
     }
+
+    pub fn byte(&self, i: usize) -> u8 {
+        if i >= self.len() {
+            panic!("Index {} out of range 0..{}", i, self.len());
+        }
+        match self {
+            Rope(Node::Leaf(l)) => l.bytes()[i],
+            Rope(Node::Branch(b)) => {
+                let mut i = i;
+                for c in b.children().iter() {
+                    if i < c.len() {
+                        return c.byte(i);
+                    }
+                    i -= c.len();
+                }
+                panic!("unreachable");
+            }
+        }
+    }
 }