feedc0de/boost_preprocessor
1
0
Fork 0
forked from boostorg/preprocessor
Code Pull Requests Activity

Added variadic is_empty and is_begin_parens along with tests.

Browse Source
This commit is contained in:
Edward Diener
2014-04-28 19:24:42 -04:00
parent 0a23b4d6a6
commit d2bfda8308
13 changed files with 375 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
include/boost/preprocessor/facilities/detail/is_empty.hpp Normal file
View File

@ -0,0 +1,55 @@
# /* **************************************************************************
# * *
# * (C) Copyright Edward Diener 2014.
# * Distributed under the Boost Software License, Version 1.0. (See
# * accompanying file LICENSE_1_0.txt or copy at
# * http://www.boost.org/LICENSE_1_0.txt)
# * *
# ************************************************************************** */
#
# /* See http://www.boost.org for most recent version. */
#
#ifndef BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
#define BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
#include <boost/preprocessor/punctuation/is_begin_parens.hpp>
#if BOOST_PP_VARIADICS_MSVC
# pragma warning(once:4002)
#define BOOST_PP_DETAIL_IS_EMPTY_IIF_0(t, b) b
#define BOOST_PP_DETAIL_IS_EMPTY_IIF_1(t, b) t
#else
#define BOOST_PP_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
#define BOOST_PP_DETAIL_IS_EMPTY_IIF_1(t, ...) t
#endif
#if BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400
#define BOOST_PP_DETAIL_IS_EMPTY_PROCESS(param) \
BOOST_PP_IS_BEGIN_PARENS \
( \
BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
) \
/**/
#else
#define BOOST_PP_DETAIL_IS_EMPTY_PROCESS(...) \
BOOST_PP_IS_BEGIN_PARENS \
( \
BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
) \
/**/
#endif
#define BOOST_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
#define BOOST_PP_DETAIL_IS_EMPTY_IIF(bit) BOOST_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(BOOST_PP_DETAIL_IS_EMPTY_IIF_,bit)
#define BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
#endif /* BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP */

13
include/boost/preprocessor/facilities/is_empty.hpp
View File

@ -1,6 +1,7 @@
# /* **************************************************************************
# * *
# * (C) Copyright Paul Mensonides 2003.
# * (C) Copyright Edward Diener 2014.
# * Distributed under the Boost Software License, Version 1.0. (See
# * accompanying file LICENSE_1_0.txt or copy at
# * http://www.boost.org/LICENSE_1_0.txt)
@ -13,6 +14,14 @@
# define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP
#
# include <boost/preprocessor/config/config.hpp>
#
# if BOOST_PP_VARIADICS
#
# include <boost/preprocessor/facilities/is_empty_variadic.hpp>
#
# else
#
# include <boost/preprocessor/config/config.hpp>
# include <boost/preprocessor/cat.hpp>
# include <boost/preprocessor/tuple/elem.hpp>
# include <boost/preprocessor/facilities/empty.hpp>
@ -40,4 +49,6 @@
# define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 0, BOOST_PP_NIL
# endif
#
# endif
# endif /* BOOST_PP_VARIADICS */
#
# endif /* BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP */

56
include/boost/preprocessor/facilities/is_empty_variadic.hpp Normal file
View File

@ -0,0 +1,56 @@
# /* **************************************************************************
# * *
# * (C) Copyright Edward Diener 2014.
# * Distributed under the Boost Software License, Version 1.0. (See
# * accompanying file LICENSE_1_0.txt or copy at
# * http://www.boost.org/LICENSE_1_0.txt)
# * *
# ************************************************************************** */
#
# /* See http://www.boost.org for most recent version. */
#
# ifndef BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP
# define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP
#
# include <boost/preprocessor/config/config.hpp>
#
# if BOOST_PP_VARIADICS
#
# include <boost/preprocessor/punctuation/is_begin_parens.hpp>
# include <boost/preprocessor/facilities/detail/is_empty.hpp>
#
#define BOOST_PP_IS_EMPTY_GEN_ZERO(...) 0
#if BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400
#
#define BOOST_PP_IS_EMPTY(param) \
BOOST_PP_DETAIL_IS_EMPTY_IIF \
( \
BOOST_PP_IS_BEGIN_PARENS \
( \
param \
) \
) \
( \
BOOST_PP_IS_EMPTY_GEN_ZERO, \
BOOST_PP_DETAIL_IS_EMPTY_PROCESS \
) \
(param) \
/**/
# else
#define BOOST_PP_IS_EMPTY(...) \
BOOST_PP_DETAIL_IS_EMPTY_IIF \
( \
BOOST_PP_IS_BEGIN_PARENS \
( \
__VA_ARGS__ \
) \
) \
( \
BOOST_PP_IS_EMPTY_GEN_ZERO, \
BOOST_PP_DETAIL_IS_EMPTY_PROCESS \
) \
(__VA_ARGS__) \
/**/
# endif /* BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400 */
# endif /* BOOST_PP_VARIADICS */
# endif /* BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP */