| # /* 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)) |