X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fmeta.h;h=d6ca35935543049d8026b842ecca40785a92ecae;hb=7be37ad97a2fd3494cb5d56badb45997353ff709;hp=923096517dba8132a873de68a79344ab6e2910b1;hpb=ff0d3252cad08280b9c320b3fea5a11c80406c23;p=libs%2Fcore.git

diff --git a/source/core/meta.h b/source/core/meta.h
index 9230965..d6ca359 100644
--- a/source/core/meta.h
+++ b/source/core/meta.h
@@ -1,6 +1,8 @@
 #ifndef MSP_CORE_META_H_
 #define MSP_CORE_META_H_
 
+#include <cstddef>
+
 namespace Msp {
 
 template<typename T>
@@ -41,10 +43,13 @@ struct Sfinae
 	struct Yes { char c[2]; };
 	struct No { char c; };
 
-	template<size_t s>
+	template<typename T>
+	static No f(...);
+
+	template<typename C, typename T>
 	struct Evaluate
 	{
-		enum { value = (s==sizeof(Yes)) };
+		enum { value = (sizeof(C::template f<T>(0))==sizeof(Yes)) };
 	};
 };