Files
preprocessor/example/subscript_layer.cpp
Vesa Karvonen 6bfd1b65f1 Bug fix
[SVN r12694]
2002-02-04 15:19:08 +00:00

31 lines
852 B
C++

/* Copyright (C) 2002
* Housemarque Oy
* http://www.housemarque.com
*
* 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.
*
* See http://www.boost.org for most recent version.
*/
/* This example shows how BOOST_PP_EMPTY can be used as an unused or
* empty parameter.
*/
#include <boost/preprocessor/empty.hpp>
/* This could be a layer from a generative container library. */
template<class base>
struct subscript_layer : base
{
#define DEF(CV)\
CV() typename base::value_type& operator[](typename base::index_type i) CV()\
{ return base::begin()[i]; }
DEF(BOOST_PP_EMPTY)
DEF(const BOOST_PP_EMPTY)
#undef DEF
};