Deprecate libMesh::boostcopy::enable_if_c

We shouldn't need this any more; std::enable_if was in C++11!

Author: roystgnr

include/utils/compare_types.h

@@ -31,8 +31,8 @@
 namespace libMesh
 {
 
-// Copy of boost's enable_if_c
-
+// Copy of boost's enable_if_c - needed before we had std::enable_if
+#ifdef LIBMESH_ENABLE_DEPRECATED
 namespace boostcopy {
 template <bool B, class T = void>
 struct enable_if_c {
@@ -42,6 +42,7 @@ struct enable_if_c {
 template <class T>
 struct enable_if_c<false, T> {};
 }
+#endif // LIBMESH_ENABLE_DEPRECATED
 
 
 // TypesEqual takes two types as parameters.