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37 lines
1.6 KiB
C++
37 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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* 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 demonstrates the usage of preprocessor lists for generating C++ code.
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#include <boost/preprocessor/list/for_each.hpp>
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#include <boost/preprocessor/tuple/to_list.hpp>
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#include <boost/preprocessor/empty.hpp>
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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(9,(char, signed char, unsigned char, short, unsigned short, int, unsigned, long, unsigned long))
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// Template for testing whether a type is an integral type.
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template<class T> struct is_integral {enum {value = false};};
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// Macro for defining a specialization of is_integral<> template.
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// NOTE: CV is invoked so that it is possible to pass empty cv-qualifiers.
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#define IS_INTEGRAL_SPECIALIZATION(_,CV,T)\
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template<> struct is_integral<CV() T> {enum {value = true};};
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BOOST_PP_LIST_FOR_EACH(IS_INTEGRAL_SPECIALIZATION, BOOST_PP_EMPTY, INTEGRAL_TYPES)
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BOOST_PP_LIST_FOR_EACH(IS_INTEGRAL_SPECIALIZATION, const BOOST_PP_EMPTY, INTEGRAL_TYPES)
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BOOST_PP_LIST_FOR_EACH(IS_INTEGRAL_SPECIALIZATION, volatile BOOST_PP_EMPTY, INTEGRAL_TYPES)
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BOOST_PP_LIST_FOR_EACH(IS_INTEGRAL_SPECIALIZATION, const volatile BOOST_PP_EMPTY, INTEGRAL_TYPES)
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#undef IS_INTEGRAL_SPECIALIZATION
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#undef INTEGRAL_TYPES
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