Eliminates dependency on metatools for AnyContainer

Author: Eduardo Madrid

inc/meta/InplaceType.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#ifndef NO_STANDARD_INCLUDES
+#include <type_traits>
+#include <utility>
+#endif
+
+namespace meta {
+    template<typename T>
+    struct InplaceType: std::false_type {};
+
+    template<typename T>
+    struct InplaceType<std::in_place_type_t<T>>: std::true_type {};
+}

inc/meta/NotBasedOn.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#ifndef NO_STANDARD_INCLUDES
+#include <type_traits>
+#endif
+
+namespace meta {
+
+/// \brief whether \c T derives from \c Base
+/// \author Andrzej Krzemieński
+/// \note https://akrzemi1.wordpress.com/2013/10/10/too-perfect-forwarding/
+template<typename T, typename Base>
+constexpr bool NotBasedOn() {
+    using DecayedT = std::decay_t<T>;
+    return 
+        !std::is_same<DecayedT, Base>::value &&
+        !std::is_base_of<Base, DecayedT>::value;
+}
+
+}

inc/zoo/any.h

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef ZOO_ANY
+#define ZOO_ANY
 
 #include <zoo/PolymorphicContainer.h>
 #include <zoo/utility.h>
@@ -296,4 +297,5 @@ typename Policy::Visit *visits(const AnyContainer<Policy> &a) {
 
 }
 
-/// \todo guarantee alignment new, tests
+#endif
+