Function get_const_begin__impl

inst/include/Rcpp/sugar/tools/iterator.h:126–128

    template <typename T>
    inline typename sugar_const_iterator_type<T>::type get_const_begin__impl(const T& obj, Rcpp::traits::true_type ){
        return obj.begin() ;
    }
    template <typename T>
    inline typename sugar_const_iterator_type<T>::type get_const_begin__impl(const T& obj, Rcpp::traits::false_type ){
        typedef typename sugar_const_iterator_type<T>::type const_iterator ;