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Using private detail CAT to avoid DELAY macros

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[SVN r14147]
This commit is contained in:
Vesa Karvonen
2002-06-14 20:38:54 +00:00
parent 5e0488f509
commit 54d0da5221
10 changed files with 57 additions and 34 deletions
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5
include/boost/preprocessor/logical/bool.hpp
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@ -13,18 +13,19 @@
* See http://www.boost.org for most recent version.
*/
#include <boost/preprocessor/detail/cat.hpp>
/** <p>Expands to <code>0</code> if <code>X == 0</code> and <code>1</code> if <code>X != 0</code>.</p>
<p><code>X</code> must be an integer literal in the range [0, BOOST_PP_LIMIT_MAG].</p>
<p>For example, <code>BOOST_PP_BOOL(3)</code> expands to <code>1</code>.</p>
*/
#define BOOST_PP_BOOL(X) BOOST_PP_BOOL_DELAY(X)
#define BOOST_PP_BOOL(X) BOOST_PP_DETAIL_CAT2(BOOST_PP_BOOL,X)
/* BOOL can be implemented in O(1) tokens using saturated ADD & SUB.
* Unfortunately, it would result in significantly slower preprocessing.
*/
#define BOOST_PP_BOOL_DELAY(X) BOOST_PP_BOOL##X
#define BOOST_PP_BOOL0 0
#define BOOST_PP_BOOL1 1
#define BOOST_PP_BOOL2 1