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