From 65294edebc7a460af54b84204c9c068f241106bb Mon Sep 17 00:00:00 2001
From: David Lebee <david@poweredsoft.com>
Date: Thu, 5 Apr 2018 19:40:33 -0500
Subject: [PATCH] null type resolving.

---
 PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs |  2 ++
 PoweredSoft.DynamicLinq/Parser/ParserExtensions.cs | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs b/PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs
index 1b51da4..c5cd3fc 100644
--- a/PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs
+++ b/PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs
@@ -97,6 +97,8 @@ namespace PoweredSoft.DynamicLinq.ConsoleApp
             // group the piece by common parameters
             var groups = Parser.GroupBySharedParameters();
 
+            var nullType = groups.ResolveNullHandlingType();
+
             Expression currentExpression = null;
             groups.ReversedForEach(group =>
             {
diff --git a/PoweredSoft.DynamicLinq/Parser/ParserExtensions.cs b/PoweredSoft.DynamicLinq/Parser/ParserExtensions.cs
index 5fdb7ac..e212aca 100644
--- a/PoweredSoft.DynamicLinq/Parser/ParserExtensions.cs
+++ b/PoweredSoft.DynamicLinq/Parser/ParserExtensions.cs
@@ -28,5 +28,16 @@ namespace PoweredSoft.DynamicLinq.Parser
         {
             return group.Pieces.Last().EnumerableType;
         }
+
+        public static Type ResolveNullHandlingType(this List<ExpressionParserPieceGroup> groups)
+        {
+            if (groups.Count() == 1)
+            {
+                throw new NotImplementedException();
+            }
+
+            var type = groups.Last().Pieces.Last().Type;
+            return typeof(IEnumerable<>).MakeGenericType(type);
+        }
     }
 }