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duo5.hpp
29 lines (27 loc) · 986 Bytes
/
duo5.hpp
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/* The following code example is taken from the book
* "C++ Templates - The Complete Guide"
* by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
*
* (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/
#include "typeop.hpp"
// return Nth value of variable duo
template <int N, typename A, typename B>
inline
typename TypeOp<typename DuoT<N, Duo<A, B> >::ResultT>::RefT
val(Duo<A, B>& d)
{
return DuoValue<N, Duo<A, B> >::get(d);
}
// return Nth value of constant duo
template <int N, typename A, typename B>
inline
typename TypeOp<typename DuoT<N, Duo<A, B> >::ResultT>::RefConstT
val(Duo<A, B> const& d)
{
return DuoValue<N, Duo<A, B> >::get(d);
}