Remove meta.transform duplicating Phobos

middle/tanya/memory/allocator.d

@@ -17,6 +17,7 @@
  */
 module tanya.memory.allocator;
 
+import std.traits : hasElaborateDestructor;
 import tanya.memory.lifetime;
 import tanya.meta.trait;
 

middle/tanya/memory/lifetime.d

@@ -14,6 +14,7 @@
  */
 module tanya.memory.lifetime;
 
+import std.traits : isInnerClass, hasElaborateAssign, hasElaborateCopyConstructor, hasElaborateDestructor;
 import tanya.memory.allocator;
 import tanya.meta.metafunction;
 import tanya.meta.trait;
@@ -60,7 +61,7 @@ package(tanya) void destroyAllImpl(R, E)(R p)
  * Postcondition: $(D_PARAM memory) and the result point to the same memory.
  */
 T emplace(T, U, Args...)(void[] memory, U outer, auto ref Args args)
-if (!isAbstractClass!T && isInnerClass!T && is(typeof(T.outer) == U))
+if (is(T == class) && !isAbstractClass!T && isInnerClass!T && is(typeof(T.outer) == U))
 in
 {
     assert(memory.length >= stateSize!T);