feat: added macros for casting typeclass exporting mirror

core/src/mirror.h

@@ -43,6 +43,22 @@ extern const void* mirror_get_typeclass(void* data, IMirror const* tc, const cha
 // 
 extern void* mirror_get_function(void* data, IMirror const* tc, const char* typeclass_name);
 
+// macro reexport of mirror_get_function which will cast the function so it can be called immediately
+// example:
+// MIRROR_GET_WRAP_FUNC(physics_entity.data, physics_entity.mirror, BehaviourEntity)(physics_entity.data)
+#define MIRROR_GET_WRAP_FUNC(Data_, MirrorTc_, Typeclass_)\
+((Typeclass_(*)(void*))mirror_get_function(Data_, MirrorTc_, #Typeclass_))
+
+// casting only works if the typeclass in question exposes IMirror as .mirror
+// will segfault if the Mirror does not expose To_
+// example:
+// TC_CAST(physics_entity, BehaviourEntity)
+#define TC_CAST(From_, To_)\
+MIRROR_GET_WRAP_FUNC(From_.data, From_.mirror, To_)(From_.data)
+
+#define TC_MIRRORS(From_, To_)\
+MIRROR_GET_WRAP_FUNC(From_.data, From_.mirror, To_) != NULL
+
 #define MIRROR_TRY_WRAP(Into_, Mirror_, Typeclass_){\
     MirroredTypeclassWrapFunc fn_ = mirror_get_typeclass(Mirror_, #Typeclass_);\
     if(fn_ != NULL) {\
@@ -89,7 +105,8 @@ List* T##_get_typeclasses(T* self) {\
     if(!init_flag) {\
         init_flag = 1;\
         typeclasses = list_init(sizeof(MirroredTypeclass));\
-        MirroredTypeclass tc;
+        MirroredTypeclass tc;\
+    REFLECT_TYPECLASS(T, Mirror)
 
 #define REFLECT_TYPECLASS(T, TypeClass_)\
     tc = (MirroredTypeclass){\