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- # /* Copyright (C) 2002
- # * Housemarque Oy
- # * http://www.housemarque.com
- # *
- # * Distributed under the Boost Software License, Version 1.0. (See
- # * accompanying file LICENSE_1_0.txt or copy at
- # * http://www.boost.org/LICENSE_1_0.txt)
- # */
- #
- # /* Revised by Paul Mensonides (2002) */
- #
- # /* See http://www.boost.org for most recent version. */
- #
- # /* This example demonstrates the usage of preprocessor lists for generating C++ code. */
- #
- # include <boost/preprocessor/facilities/empty.hpp>
- # include <boost/preprocessor/list/at.hpp>
- # include <boost/preprocessor/list/for_each_product.hpp>
- # include <boost/preprocessor/tuple/elem.hpp>
- # include <boost/preprocessor/tuple/to_list.hpp>
- #
- # /* List of integral types. (Strictly speaking, wchar_t should be on the list.) */
- # define INTEGRAL_TYPES \
- BOOST_PP_TUPLE_TO_LIST( \
- 9, (char, signed char, unsigned char, short, unsigned short, int, unsigned, long, unsigned long) \
- ) \
- /**/
- #
- # /* List of invokeable cv-qualifiers */
- # define CV_QUALIFIERS \
- BOOST_PP_TUPLE_TO_LIST( \
- 4, (BOOST_PP_EMPTY, const BOOST_PP_EMPTY, volatile BOOST_PP_EMPTY, const volatile BOOST_PP_EMPTY) \
- ) \
- /**/
- #
- # /* Template for testing whether a type is an integral type. */
- template<class T> struct is_integral {
- enum { value = false };
- };
- # /* Macro for defining a specialization of is_integral<> template. */
- # define IS_INTEGRAL_SPECIALIZATION(R, L) \
- template<> struct is_integral<BOOST_PP_TUPLE_ELEM(2, 0, L)() BOOST_PP_TUPLE_ELEM(2, 1, L)> { \
- enum { value = true }; \
- }; \
- /**/
- BOOST_PP_LIST_FOR_EACH_PRODUCT(IS_INTEGRAL_SPECIALIZATION, 2, (CV_QUALIFIERS, INTEGRAL_TYPES))
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