X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fcore%2Fmeta.h;h=35373013e5eb91d6faceae24592dcd298f4b1280;hp=0034512b6ec2bea573ffbcc34115fc8562a5cac8;hb=HEAD;hpb=967785734be5c3fc6f75da122c2d93ebbb338271

diff --git a/source/core/meta.h b/source/core/meta.h
index 0034512..3537301 100644
--- a/source/core/meta.h
+++ b/source/core/meta.h
@@ -1,24 +1,79 @@
 #ifndef MSP_CORE_META_H_
 #define MSP_CORE_META_H_
 
+#include <cstddef>
+#include "attributes.h"
+
 namespace Msp {
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 template<typename T>
-struct RemoveConst
+struct DEPRECATED RemoveConst
 { typedef T Type; };
 
 template<typename T>
-struct RemoveConst<const T>
+struct DEPRECATED RemoveConst<const T>
 { typedef T Type; };
 
+
 template<typename T>
-struct RemoveReference
+struct DEPRECATED RemoveReference
 { typedef T Type; };
 
 template<typename T>
-struct RemoveReference<T &>
+struct DEPRECATED RemoveReference<T &>
 { typedef T Type; };
 
+
+template<typename T>
+struct DEPRECATED RemoveConstReference
+{ typedef typename RemoveConst<typename RemoveReference<T>::Type>::Type Type; };
+
+
+template<bool c, typename R>
+struct DEPRECATED EnableIf;
+
+template<typename R>
+struct DEPRECATED EnableIf<true, R>
+{ typedef R Yes; };
+
+template<typename R>
+struct DEPRECATED EnableIf<false, R>
+{ typedef R No; };
+#pragma GCC diagnostic pop
+
+
+/**
+Common fragments used in SFINAE-based decider constructs.
+*/
+struct Sfinae
+{
+	struct Yes { char c[2]; };
+	struct No { char c; };
+
+	template<typename T>
+	static No f(...);
+
+	template<typename C, typename T>
+	struct Evaluate
+	{
+		enum { value = (sizeof(C::template f<T>(0))==sizeof(Yes)) };
+	};
+};
+
+
+struct CheckEqualityComparable: Sfinae
+{
+	static int &v;
+	template<typename T>
+	static Yes f(int (*)[sizeof(reinterpret_cast<const T &>(v)==reinterpret_cast<const T &>(v))]);
+	using Sfinae::f;
+};
+
+template<typename T>
+struct IsEqualityComparable: Sfinae::Evaluate<CheckEqualityComparable, T> { };
+
 } // namespace Msp
 
 #endif