inherit from template class and using inherit its constructor

Question

i want to inherit a template class, and use "using" to inherit its constructor. But when i call the move constructor, fail in "no matching constructor"

#include <iostream>

template <typename ARG>
class TBase {
 public:
  TBase() {}
  TBase(TBase<ARG>&& t) {}

 private:
  ARG arg;
};

class Int : public TBase<int> {
 public:
  using TBase<int>::TBase;
};

int main() {
  TBase<int> t1;
  Int t2(std::move(t1));
  return 0;
}

the build result

 In function 'int main()':
20:23: error: no matching function for call to 'Int::Int(std::remove_reference<TBase<int>&>::type)'
20:23: note: candidates are:
13:7: note: Int::Int()
13:7: note:   candidate expects 0 arguments, 1 provided
13:7: note: Int::Int(Int&&)
13:7: note:   no known conversion for argument 1 from 'std::remove_reference<TBase<int>&>::type {aka TBase<int>}' to 'Int&&'

Answer 1

Well, the problem is simple to explain:

Default-, Copy- and Move- ctors are special. They are not inherited by inheriting ctors. For the details, read more about inheriting constructors here.

So, write your own ctor accepting a baseclass-instance. Shouldn't be too hard, as you try to simply inherit ctors.