我找不到办法让这个工作.它甚至可能吗？我不明白为什么不会这样.
template <auto id,typename FirstField,typename... OtherFields>
struct FieldTypeById {
using Type = int;
};
template <auto id>
struct FieldTypeById<id,void> {
using Type = void;
};
int main()
{
using t1 = FieldTypeById<0,int>::Type;
using t2 = FieldTypeById<1>::Type;
return 0;
}
