std::_Rb_tree<int,std::pair<int const,bool>,std::_Select1st<std::pair<int const,bool>>,std::less<int>,std::allocator<std::pair<int const,bool>>>::operator=(std::_Rb_tree<int,std::pair<int const,bool>,std::_Select1st<std::pair<int const,bool>>,std::less<int>,std::allocator<std::pair<int const,bool>>> const&)