From adaafdd7043507cbceae65e78c38954e47103b5c Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Mon, 11 May 2020 11:33:45 -0400
Subject: Fix some clippy lints

---
 src/frontier.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/frontier.rs')

diff --git a/src/frontier.rs b/src/frontier.rs
index 7143cb7..c7b7ca5 100644
--- a/src/frontier.rs
+++ b/src/frontier.rs
@@ -23,6 +23,9 @@ pub trait Frontier {
     /// The number of pixels currently on the frontier.
     fn len(&self) -> usize;
 
+    /// Whether the frontier is empty.
+    fn is_empty(&self) -> bool;
+
     /// Place the given color on the frontier, and return its position.
     fn place(&mut self, rgb8: Rgb8) -> Option<(u32, u32)>;
 }
-- 
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