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30 lines
1000 B
C
30 lines
1000 B
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 shows how BOOST_PP_CAT() can be used to allow macro
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* expansion before token concatenation.
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*/
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#include <boost/preprocessor/cat.hpp>
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/* Use of BOOST_PP_CAT() below allows macro expansion of __LINE__. */
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#define STATIC_ASSERT(EXPR)\
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typedef char BOOST_PP_CAT(static_assert_,__LINE__)[ (EXPR) ? 1 : -1 ]
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STATIC_ASSERT(sizeof(int) <= sizeof(long));
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/* This static assert is broken. The __LINE__ is not expanded as desired. */
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#define BROKEN_STATIC_ASSERT(EXPR)\
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typedef char static_assert_##__LINE__[ (EXPR) ? 1 : -1 ]
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BROKEN_STATIC_ASSERT(sizeof(int) <= sizeof(long));
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