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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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28
include/boost/preprocessor/arithmetic/sub.hpp
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@ -17,22 +17,22 @@
<a href="../../../../boost/preprocessor/arithmetic/sub.hpp">Click here to see the header.</a>
*/
#ifndef BOOST_PREPROCESSOR_DEC_HPP
# include <boost/preprocessor/dec.hpp>
#endif
#ifndef BOOST_PREPROCESSOR_TUPLE_HPP
# include <boost/preprocessor/tuple.hpp>
#endif
#ifndef BOOST_PREPROCESSOR_WHILE_HPP
# include <boost/preprocessor/while.hpp>
#endif
#include <boost/preprocessor/dec.hpp>
#include <boost/preprocessor/tuple.hpp>
#include <boost/preprocessor/while.hpp>
//! Expands to the difference of X and Y.
#define BOOST_PREPROCESSOR_SUB(X,Y) BOOST_PREPROCESSOR_SUB_I(0,X,Y)
/*!
For example, BOOST_PP_SUB(4,3) expands to 1 (a single token).
*/
#define BOOST_PP_SUB(X,Y) BOOST_PP_SUB_D(0,X,Y)
#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define BOOST_PREPROCESSOR_SUB_I(I,X,Y) BOOST_PREPROCESSOR_TUPLE_ELEM(2,0,BOOST_PREPROCESSOR_WHILE##I(BOOST_PREPROCESSOR_SUB_C,BOOST_PREPROCESSOR_SUB_F,(X,Y)))
#define BOOST_PREPROCESSOR_SUB_C(I,P) BOOST_PREPROCESSOR_TUPLE_ELEM(2,1,P)
#define BOOST_PREPROCESSOR_SUB_F(I,P) (BOOST_PREPROCESSOR_DEC(BOOST_PREPROCESSOR_TUPLE_ELEM(2,0,P)),BOOST_PREPROCESSOR_DEC(BOOST_PREPROCESSOR_TUPLE_ELEM(2,1,P)))
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
#define BOOST_PP_SUB_D(D,X,Y) BOOST_PP_TUPLE_ELEM(2,0,BOOST_PP_WHILE##D(BOOST_PP_SUB_C,BOOST_PP_SUB_F,(X,Y)))
#define BOOST_PP_SUB_C(D,P) BOOST_PP_TUPLE_ELEM(2,1,P)
#define BOOST_PP_SUB_F(D,P) (BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,0,P)),BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,1,P)))
#endif
//! Obsolete. Use BOOST_PP_SUB(X,Y).
#define BOOST_PREPROCESSOR_SUB(X,Y) BOOST_PP_SUB(X,Y)
#endif