From 117e22cdd0d6b20968fc39e2c8e1a7e6c73e9e73 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 4 Jun 2016 16:13:59 +0100
Subject: Use single instance of None

---
 Mammoth/Couscous/java/util/HashMap.cs  | 2 +-
 Mammoth/Couscous/java/util/Optional.cs | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

(limited to 'Mammoth/Couscous/java')

diff --git a/Mammoth/Couscous/java/util/HashMap.cs b/Mammoth/Couscous/java/util/HashMap.cs
index 38e516e..10070fc 100644
--- a/Mammoth/Couscous/java/util/HashMap.cs
+++ b/Mammoth/Couscous/java/util/HashMap.cs
@@ -30,7 +30,7 @@ namespace Mammoth.Couscous.java.util {
             if (_dictionary.ContainsKey(key)) {
                 return new Some<TValue>(_dictionary[key]);
             } else {
-                return new None<TValue>();
+                return None<TValue>.Instance;
             }
         }
         
diff --git a/Mammoth/Couscous/java/util/Optional.cs b/Mammoth/Couscous/java/util/Optional.cs
index f295688..b5be056 100644
--- a/Mammoth/Couscous/java/util/Optional.cs
+++ b/Mammoth/Couscous/java/util/Optional.cs
@@ -16,6 +16,11 @@ namespace Mammoth.Couscous.java.util
     }
 
 	internal class None<T> : Optional<T> {
+		internal static readonly None<T> Instance = new None<T>();
+		
+		private None() {
+		}
+		
 		public bool isPresent() {
 			return false;
 		}
@@ -92,7 +97,7 @@ namespace Mammoth.Couscous.java.util
     {
 		internal static Optional<T> empty<T>()
         {
-			return new None<T>();
+			return None<T>.Instance;
         }
         
         internal static Optional<T> of<T>(T value)
-- 
cgit v1.2.3