From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 26 Mar 2013 20:37:08 +0000 (+0200)
Subject: Use the Sfinae helper struct from mspcore
X-Git-Url: http://git.tdb.fi/?p=libs%2Fdatafile.git;a=commitdiff_plain;h=8b7cadfa3b5a72ecf466c589e1c8328d8500b588

Use the Sfinae helper struct from mspcore
---

diff --git a/source/collection.h b/source/collection.h
index 7a09f50..a7ac59b 100644
--- a/source/collection.h
+++ b/source/collection.h
@@ -17,17 +17,14 @@ namespace DataFile {
 Helper struct to determine whether a Loader has a Collection typedef.
 */
 template<typename T>
-struct NeedsCollection
+struct NeedsCollection: public Sfinae
 {
-	struct Yes { char c[2]; };
-	struct No { char c; };
-
 	template<typename U>
 	static Yes f(typename U::Collection *);
 	template<typename U>
 	static No f(...);
 
-	enum { value = (sizeof(f<T>(0))==sizeof(Yes)) };
+	enum { value = Evaluate<sizeof(f<T>(0))>::value };
 };
 
 class CollectionItemTypeBase;