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PREPROCESSOR -> PP. WHILE documented.

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[SVN r12162]
This commit is contained in:
Vesa Karvonen
2001-12-28 11:06:53 +00:00
parent 5991b00456
commit d8b52a3a42
90 changed files with 3441 additions and 1889 deletions
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17
include/boost/preprocessor/identity.hpp
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@ -17,19 +17,17 @@
<a href="../../../../boost/preprocessor/identity.hpp">Click here to see the header.</a>
*/
#ifndef BOOST_PREPROCESSOR_EMPTY_HPP
# include <boost/preprocessor/empty.hpp>
#endif
#include <boost/preprocessor/empty.hpp>
//! Expands to X once invoked.
/*!
Designed to be used with BOOST_PREPROCESSOR_IF(), when one of the clauses need to be invoked.
Designed to be used with BOOST_PP_IF(), when one of the clauses need to be invoked.
Example:
<PRE>\verbatim
BOOST_PREPROCESSOR_IDENTITY(X)()
// ^^ NOTE!
BOOST_PP_IDENTITY(X)()
// ^^ NOTE!
\endverbatim</PRE>
The above expands to:
@ -38,7 +36,10 @@ The above expands to:
X
\endverbatim</PRE>
NOTE: If BOOST_PREPROCESSOR_IDENTITY() is not invoked, the expansion will not be usable.
NOTE: If BOOST_PP_IDENTITY() is not invoked, the expansion will not be usable.
*/
#define BOOST_PREPROCESSOR_IDENTITY(X) X BOOST_PREPROCESSOR_EMPTY
#define BOOST_PP_IDENTITY(X) X BOOST_PP_EMPTY
//! Obsolete. Use BOOST_PP_IDENTITY().
#define BOOST_PREPROCESSOR_IDENTITY(X) BOOST_PP_IDENTITY(X)
#endif