+static inline impl_val *struct_member_ref(decl_arg *set_arg, impl_val *struct_ptr, impl_val **to_free) {
+ void *ptr = (char *) struct_ptr->ptr + set_arg->layout->pos;
+ impl_val *val = enref_impl_val(ptr, set_arg->var);
+
+ if (val != ptr) {
+ *to_free = val;
+ }
+
+ return val;
+}