From fbe8ccb5da69e467fce4288ffe5d5155f903b721 Mon Sep 17 00:00:00 2001
From: Paulo Anjos <pnmanjos@hotmail.com>
Date: Sun, 15 Jan 2017 23:44:47 -0200
Subject: [PATCH] Better handling of Success/Error

---
 src/Discord.Net.Commands/Readers/NullableTypeReader.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Discord.Net.Commands/Readers/NullableTypeReader.cs b/src/Discord.Net.Commands/Readers/NullableTypeReader.cs
index ce5ad611a..1a8e21e47 100644
--- a/src/Discord.Net.Commands/Readers/NullableTypeReader.cs
+++ b/src/Discord.Net.Commands/Readers/NullableTypeReader.cs
@@ -24,10 +24,12 @@ namespace Discord.Commands
 
         public override Task<TypeReaderResult> Read(ICommandContext context, string input)
         {
+            if(input == null)
+                return Task.FromResult(TypeReaderResult.FromSuccess(new Nullable<T>()));
             T value;
             if (_tryParse(input, out value))
                 return Task.FromResult(TypeReaderResult.FromSuccess(new Nullable<T>(value)));
-            return Task.FromResult(TypeReaderResult.FromSuccess(new Nullable<T>()));
+            return Task.FromResult(TypeReaderResult.FromError(CommandError.ParseFailed, $"Failed to parse {typeof(T).Name}"));
         }
     }
 }