X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fmeta.h;h=51bc924405d3bdc7861b054801f9f742ec90e226;hb=465ac6c7ceda80ce7e2f6e3f7b6901ce0921406e;hp=ac6ec1be2029e18b0a22c8f692be796687f2e03d;hpb=41e78ee91ca058ead90fa1c8ee4339d2ef1b0f31;p=libs%2Fdatafile.git

diff --git a/source/meta.h b/source/meta.h
index ac6ec1b..51bc924 100644
--- a/source/meta.h
+++ b/source/meta.h
@@ -18,6 +18,18 @@ struct CheckCollectionType: Sfinae
 
 template<typename T> struct NeedsCollection: Sfinae::Evaluate<CheckCollectionType, T> { };
 
+/**
+Helper struct to determine whether a type has a Loader class.
+*/
+struct CheckLoader: Sfinae
+{
+	template<typename T>
+	static Yes f(typename T::Loader *);
+	using Sfinae::f;
+};
+
+template<typename T> struct HasLoader: Sfinae::Evaluate<CheckLoader, T> { };
+
 } // namespace DataFile
 } // namespace Msp