From 5f86077aa2a9603b9928accd2f2d18f82bf40ad0 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Thu, 17 Mar 2016 19:07:40 +0000
Subject: util.cache: Add head() and tail() methods (and tests)

---
 util/cache.lua | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'util/cache.lua')

diff --git a/util/cache.lua b/util/cache.lua
index d3639b3f..e53bf4bf 100644
--- a/util/cache.lua
+++ b/util/cache.lua
@@ -92,6 +92,18 @@ function cache_methods:count()
 	return self._count;
 end
 
+function cache_methods:head()
+	local head = self._head;
+	if not head then return nil, nil; end
+	return head.key, head.value;
+end
+
+function cache_methods:tail()
+	local tail = self._tail;
+	if not tail then return nil, nil; end
+	return tail.key, tail.value;
+end
+
 local function new(size, on_evict)
 	size = assert(tonumber(size), "cache size must be a number");
 	size = math.floor(size);
-- 
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