lib cleanup

[SVN r15689]

doc/examples/is_integral.cpp

@@ -0,0 +1,50 @@
+# /* Copyright (C) 2002
+#  * Housemarque Oy
+#  * http://www.housemarque.com
+#  *
+#  * Permission to copy, use, modify, sell and distribute this software is
+#  * granted provided this copyright notice appears in all copies. This
+#  * software is provided "as is" without express or implied warranty, and
+#  * with no claim as to its suitability for any purpose.
+#  */
+#
+# /* 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))