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31 lines
852 B
C++
31 lines
852 B
C++
/* Copyright (C) 2002
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* Housemarque Oy
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* http://www.housemarque.com
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*
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* Permission to copy, use, modify, sell and distribute this software is
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* granted provided this copyright notice appears in all copies. This
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* software is provided "as is" without express or implied warranty, and
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* with no claim as to its suitability for any purpose.
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*
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* See http://www.boost.org for most recent version.
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*/
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/* This example shows how BOOST_PP_EMPTY can be used as an unused or
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* empty parameter.
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*/
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#include <boost/preprocessor/empty.hpp>
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/* This could be a layer from a generative container library. */
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template<class base>
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struct subscript_layer : base
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{
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#define DEF(CV)\
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CV() typename base::value_type& operator[](typename base::index_type i) CV()\
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{ return base::begin()[i]; }
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DEF(BOOST_PP_EMPTY)
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DEF(const BOOST_PP_EMPTY)
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#undef DEF
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};
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