xo-reflect: + TypeDescr:: n_child_fixed(), fixed_child_td(i)

src/reflect/function/FunctionTdx.cpp

@@ -2,6 +2,7 @@
 
 #include "function/FunctionTdx.hpp"
 #include "TaggedPtr.hpp"
+#include "TypeDescr.hpp"
 
 namespace xo {
     namespace reflect {
@@ -36,6 +37,11 @@ namespace xo {
             return TaggedPtr::universal_null();
         }
 
+        TypeDescr
+        FunctionTdx::fixed_child_td(uint32_t /*i*/) const {
+            return nullptr;
+        }
+
         const std::string &
         FunctionTdx::struct_member_name(uint32_t i) const
         {