boostorg/preprocessor
1
0
Fork 1
mirror of https://github.com/boostorg/preprocessor.git synced 2025-07-15 13:36:33 +02:00
Code Issues Packages Projects Releases Wiki Activity

TUPLE_EAT added

Browse Source 
[SVN r12295]
This commit is contained in:
Vesa Karvonen
2002-01-13 15:42:53 +00:00
parent a4dc24ae7c
commit 6644430159
3 changed files with 50 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/boost/preprocessor/tuple.hpp
View File

@ -19,5 +19,6 @@
Includes all tuple headers.
*/
#include <boost/preprocessor/tuple/eat.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#endif

47
include/boost/preprocessor/tuple/eat.hpp Normal file
View File

@ -0,0 +1,47 @@
#ifndef BOOST_PREPROCESSOR_TUPLE_EAT_HPP
#define BOOST_PREPROCESSOR_TUPLE_EAT_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.
/*! \file
<a href="../../../../boost/preprocessor/tuple/eat.hpp">Click here to see the header.</a>
*/
//! Expands to a macro that eats a tuple of the specified length.
/*!
BOOST_PP_TUPLE_EAT() is designed to be used with BOOST_PP_IF() like
BOOST_PP_EMPTY().
For example:
<PRE>\verbatim
BOOST_PP_IF(0,BOOST_PP_ENUM_PARAMS,BOOST_PP_TUPLE_EAT(2))(10,P)
\endverbatim</PRE>
The above expands to nothing.
*/
#define BOOST_PP_TUPLE_EAT(N) BOOST_PP_TUPLE_EAT_DELAY(N)
#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define BOOST_PP_TUPLE_EAT_DELAY(N) BOOST_PP_TUPLE##N##_EAT
#define BOOST_PP_TUPLE0_EAT()
#define BOOST_PP_TUPLE1_EAT(A)
#define BOOST_PP_TUPLE2_EAT(A,B)
#define BOOST_PP_TUPLE3_EAT(A,B,C)
#define BOOST_PP_TUPLE4_EAT(A,B,C,D)
#define BOOST_PP_TUPLE5_EAT(A,B,C,D,E)
#define BOOST_PP_TUPLE6_EAT(A,B,C,D,E,F)
#define BOOST_PP_TUPLE7_EAT(A,B,C,D,E,F,G)
#define BOOST_PP_TUPLE8_EAT(A,B,C,D,E,F,G,H)
#endif
#endif

4
include/boost/preprocessor/while.hpp
View File

@ -18,6 +18,7 @@
*/
#include <boost/preprocessor/if.hpp>
#include <boost/preprocessor/tuple/eat.hpp>
//! Iterates F(D,X) while C(D,X) is true.
/*!
@ -113,8 +114,7 @@ it possible to compute N*N functions.
#define BOOST_PP_WHILE(C,F,X) BOOST_PP_WHILE_C(C(1,X),0,X)(C,F,F(1,X))
#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define BOOST_PP_WHILE_C(C,D,X) BOOST_PP_IF(C,BOOST_PP_WHILE##D,X BOOST_PP_WHILE_E)
#define BOOST_PP_WHILE_E(C,F,X)
#define BOOST_PP_WHILE_C(C,D,X) BOOST_PP_IF(C,BOOST_PP_WHILE##D,X BOOST_PP_TUPLE3_EAT)
#define BOOST_PP_WHILE0(C,F,X) BOOST_PP_WHILE_C(C(2,X),1,X)(C,F,F(2,X))
#define BOOST_PP_WHILE1(C,F,X) BOOST_PP_WHILE_C(C(3,X),2,X)(C,F,F(3,X))
#define BOOST_PP_WHILE2(C,F,X) BOOST_PP_WHILE_C(C(4,X),3,X)(C,F,F(4,X))