VS2015 uses c++11 syntax difference

The program runs normally under the Linux system, and now the following error occurs when using VS2015 on the Windows7 system

note: see declaration of 'ncorr::details::base_region<T_container>::operator ='

note: definition

note: 'std::enable_ifstd::is_same<container_traits<T_container2::nonconst_container,base_region<T_container>::nonconst_container>::value,ncorr::details::base_region<T_container>&>::type ncorr::details::base_region<T_container>::operator =(const ncorr::details::base_region<T_container> &)'

note: existing declarations

note: 'ncorr::details::base_region<T_container> &ncorr::details::base_region<T_container>::operator =(container_traits<T_container>::const_reference)'

note: 'ncorr::details::base_region<T_container> &ncorr::details::base_region<T_container>::operator =(container_traits<T_container>::const_container &)'

etc

I feel that this is usually a problem with VS2015, and certain C++ syntaxes are somewhat different on VS2015. Below is the code part, thanks for telling me the improvement part

// Base Region -----------------------------------------------------------//
    template <typename T_container>
    base_region<T_container>& base_region<T_container>::operator=(const base_region &reg) {
        if (this->region_h != reg.region_h || this->region_w != reg.region_w) {
            throw std::invalid_argument("Attempted to assign region of size: " + reg.region_size_2D_string() + 
                                        " to region of size: " + region_size_2D_string() + ".");
        }
               
        std::copy(reg.begin(), reg.end(), this->begin());
        
        return *this;
    }  
    
    template <typename T_container>
    template <typename T_container2>
    typename std::enable_if<std::is_same<typename container_traits<T_container2>::nonconst_container, typename base_region<T_container>::nonconst_container>::value, base_region<T_container>&>::type base_region<T_container>::operator=(const base_region<T_container2> &reg) {
        if (this->region_h != reg.region_h || this->region_w != reg.region_w) {
            throw std::invalid_argument("Attempted to assign region of size: " + reg.region_size_2D_string() + 
                                        " to region of size: " + region_size_2D_string() + ".");
        }
               
        std::copy(reg.begin(), reg.end(), this->begin());
        
        return *this;
    }