Fix to Meta/Matching

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>

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);
 }
 

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);
+    }
 }