Re: [PR] [FFI] Provide Field Visit bridge so we can do gradual transition [tvm]

["tqchen (via GitHub)" <gi...@apache.org>]

tqchen commented on PR #18091:
URL: https://github.com/apache/tvm/pull/18091#issuecomment-3000967036

   Example
   ```c++
   struct TestAttrs : public AttrsNodeReflAdapter<TestAttrs> {
     int axis;
     String name;
     Array<PrimExpr> padding;
     TypedEnvFunc<int(int)> func;
   
     static void RegisterReflection() {
       namespace refl = tvm::ffi::reflection;
       refl::ObjectDef<TestAttrs>()
           .def_ro("axis", &TestAttrs::axis, "axis field", refl::DefaultValue(10))
           .def_ro("name", &TestAttrs::name, "name")
           .def_ro("padding", &TestAttrs::padding, "padding of input",
                   refl::DefaultValue(Array<PrimExpr>({0, 0})))
           .def_ro("func", &TestAttrs::func, "some random env function",
                   refl::DefaultValue(TypedEnvFunc<int(int)>(nullptr)));
     }
   
     static constexpr const char* _type_key = "attrs.TestAttrs";
     TVM_FFI_DECLARE_FINAL_OBJECT_INFO(TestAttrs, BaseAttrsNode);
   };
   
   TVM_FFI_STATIC_INIT_BLOCK({ 
         // can group multiple such registration
        TestAttrs::RegisterReflection();
   });
   
   // still needed for now for the shash/equal mechanism
   TVM_REGISTER_NODE_TYPE(TestAttrs);
   ```
   


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