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[SVN r15202]
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Paul Mensonides
2002-09-08 09:58:13 +00:00
parent ce2f5ccec1
commit 54d6f56c0e
106 changed files with 20 additions and 22261 deletions
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include/boost/preprocessor/if.hpp
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#ifndef BOOST_PREPROCESSOR_IF_HPP
#define BOOST_PREPROCESSOR_IF_HPP
/* Copyright (C) 2001
* 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.
*
* See http://www.boost.org for most recent version.
*/
#include <boost/preprocessor/logical/bool.hpp>
/** <p>Expands to <code>THEN</code> if <code>COND != 0</code> and <code>ELSE</code> if
<code>COND == 0</code>.</p>
<p><code>COND</code> must expand to an integer literal in the range [0, BOOST_PP_LIMIT_MAG].</p>
<p>For example, <code>BOOST_PP_IF(0,1,2)</code> expands to <code>2</code>.</p>
<h3>See</h3>
<ul>
<li>BOOST_PP_EXPR_IF()</li>
</ul>
<h3>Test</h3>
<ul>
<li><a href="../../test/preprocessor_test.cpp">preprocessor_test.cpp</a></li>
</ul>
*/
#define BOOST_PP_IF(COND,THEN,ELSE) BOOST_PP_IF_BOOL(BOOST_PP_BOOL(COND),ELSE,THEN)
#define BOOST_PP_IF_BOOL(C,E,T) BOOST_PP_IF_BOOL_DELAY(C,E,T)
#define BOOST_PP_IF_BOOL_DELAY(C,E,T) BOOST_PP_IF##C(E,T)
#define BOOST_PP_IF0(E,T) E
#define BOOST_PP_IF1(E,T) T
#endif