hanzz2007 opened a new issue #6093:
URL: https://github.com/apache/incubator-tvm/issues/6093
```C++
template <typename FFind>
class AttrInitVisitor {
public:
// Counter of number of matched attributes during visit.
// This is used to decide if there is additional unmatched attributes.
size_t hit_count_{0};
// constructor
AttrInitVisitor(const char* type_key, FFind ffind) : type_key_(type_key),
ffind_(ffind) {}
template <typename T>
AttrInitEntry<T> operator()(const char* key, T* value) {
TVMArgValue val;
AttrInitEntry<T> opt;
opt.type_key_ = type_key_;
opt.key_ = key;
opt.value_ = value;
if (ffind_(key, &val)) {
SetValue(value, val);
opt.value_missing_ = false;
++hit_count_;
} else {
opt.value_missing_ = true;
}
return opt;
// for compilers without RVO optimization, the opt.~AttrInitEntry<T>()
will be called when function exit
// An exception will be throwed if opt.value_missing_ is ture in
destructor
}
```
When the AttrsNode is first constructed
```C++
template <typename TAttrs>
inline TAttrs AttrsWithDefaultValues() {
static_assert(std::is_base_of<Attrs, TAttrs>::value, "Can only take attr
nodes");
auto n = make_object<typename TAttrs::ContainerType>();
// Note here, will cause a problem
n->InitByPackedArgs(runtime::TVMArgs(nullptr, nullptr, 0), false);
return TAttrs(n);
}
```
Maybe we could fix it via the following codes
https://gist.github.com/hanzz2007/803b28a7915c31686cffce0ac6450b73
https://gist.github.com/hanzz2007/e42b14b51c8c9c765cca107867e64d49
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