Allow to pass an explicit destructor when registering a custom tag

for a given type.

diff --git a/src/common_stub.hpp b/src/common_stub.hpp
index 5655a30..438b5d2 100644 (file)
--- a/src/common_stub.hpp
+++ b/src/common_stub.hpp
@@ -39,13 +39,13 @@ template <class X> void sxsi_finalize_custom(value v)
   sxsi_finalize_obj(Obj_val<X>(v));
 }
 
-template <class X> value sxsi_alloc_custom()
+template <class X> value sxsi_alloc_custom(void (*finalize)(value) = sxsi_finalize_custom<X>)
 {
   char * name = const_cast<char*>(typeid(X).name());
 
   value v = alloc_custom_(name);
   if (v == Val_unit) {
-    register_custom_(name, sizeof(X), sxsi_finalize_custom<X>);
+    register_custom_(name, sizeof(X), finalize);
     v = alloc_custom_(name);
   };
   return v;