From c6002149d3ccaf968c3c7ab70ae4f4ad8790a06f Mon Sep 17 00:00:00 2001
From: Stephen Seo <seo.disparate@gmail.com>
Date: Sun, 13 Mar 2016 18:17:06 +0900
Subject: [PATCH] Fix to Meta/Matching

---
 src/EC/Meta/Matching.hpp |  1 +
 src/test/ECTest.cpp      | 12 ++++++++++++
 src/test/MetaTest.cpp    |  6 ++++++
 3 files changed, 19 insertions(+)

diff --git a/src/EC/Meta/Matching.hpp b/src/EC/Meta/Matching.hpp
index e2e5a78..8b525f9 100644
--- a/src/EC/Meta/Matching.hpp
+++ b/src/EC/Meta/Matching.hpp
@@ -12,6 +12,7 @@ namespace EC
         template <typename TTypeListA, typename TTypeListB>
         struct MatchingHelper
         {
+            using type = TypeList<>;
         };
 
         template <typename TTypeListA, typename TTypeListB, typename... Matching>
diff --git a/src/test/ECTest.cpp b/src/test/ECTest.cpp
index aa546b3..a881d97 100644
--- a/src/test/ECTest.cpp
+++ b/src/test/ECTest.cpp
@@ -1,6 +1,8 @@
 
 #include <gtest/gtest.h>
 
+#include <iostream>
+
 #include <tuple>
 #include <EC/Meta/Meta.hpp>
 #include <EC/EC.hpp>
@@ -102,5 +104,15 @@ TEST(EC, Manager)
 
     std::size_t edata = std::get<std::size_t>(manager.getEntityInfo(0));
     EXPECT_EQ(edata, 1);
+
+    std::size_t e2 = manager.addEntity();
+
+    manager.addTag<T0>(e2);
+
+    auto updateTagOnly = [] (std::size_t id) {
+        std::cout << "UpdateTagOnly was run." << std::endl;
+    };
+
+    manager.forMatchingSignature<EC::Meta::TypeList<T0> >(updateTagOnly);
 }
 
diff --git a/src/test/MetaTest.cpp b/src/test/MetaTest.cpp
index 0f34fe1..6dcf850 100644
--- a/src/test/MetaTest.cpp
+++ b/src/test/MetaTest.cpp
@@ -227,5 +227,11 @@ TEST(Meta, Matching)
         bool isSame = std::is_same<ListSome, Matched>::value;
         EXPECT_TRUE(isSame);
     }
+
+    {
+        using Matched = EC::Meta::Matching<ListTagsAll, ListComponentsAll>::type;
+        bool isSame = std::is_same<EC::Meta::TypeList<>, Matched>::value;
+        EXPECT_TRUE(isSame);
+    }
 }