1
2#ifndef BOOST_MPL_AUX_PREPROCESSOR_IS_SEQ_HPP_INCLUDED
3#define BOOST_MPL_AUX_PREPROCESSOR_IS_SEQ_HPP_INCLUDED
4
5// Copyright Paul Mensonides 2003
6// Copyright Aleksey Gurtovoy 2003-2004
7//
8// Distributed under the Boost Software License, Version 1.0.
9// (See accompanying file LICENSE_1_0.txt or copy at
10// http://www.boost.org/LICENSE_1_0.txt)
11//
12// See http://www.boost.org/libs/mpl for documentation.
13
14// $Id$
15// $Date$
16// $Revision$
17
18#include <boost/preprocessor/seq/size.hpp>
19#include <boost/preprocessor/arithmetic/dec.hpp>
20#include <boost/preprocessor/punctuation/paren.hpp>
21#include <boost/preprocessor/cat.hpp>
22#include <boost/preprocessor/config/config.hpp>
23
24// returns 1 if 'seq' is a PP-sequence, 0 otherwise:
25//
26// BOOST_PP_ASSERT( BOOST_PP_NOT( BOOST_MPL_PP_IS_SEQ( int ) ) )
27// BOOST_PP_ASSERT( BOOST_MPL_PP_IS_SEQ( (int) ) )
28// BOOST_PP_ASSERT( BOOST_MPL_PP_IS_SEQ( (1)(2) ) )
29
30#if (BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_BCC()) || defined(_MSC_VER) && defined(__INTEL_COMPILER) && __INTEL_COMPILER == 1010
31
32# define BOOST_MPL_PP_IS_SEQ(seq) BOOST_PP_DEC( BOOST_PP_SEQ_SIZE( BOOST_MPL_PP_IS_SEQ_(seq) ) )
33# define BOOST_MPL_PP_IS_SEQ_(seq) BOOST_MPL_PP_IS_SEQ_SEQ_( BOOST_MPL_PP_IS_SEQ_SPLIT_ seq )
34# define BOOST_MPL_PP_IS_SEQ_SEQ_(x) (x)
35# define BOOST_MPL_PP_IS_SEQ_SPLIT_(unused) unused)((unused)
36
37#else
38
39# if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
40# define BOOST_MPL_PP_IS_SEQ(seq) BOOST_MPL_PP_IS_SEQ_MWCC_((seq))
41# define BOOST_MPL_PP_IS_SEQ_MWCC_(args) BOOST_MPL_PP_IS_SEQ_ ## args
42# else
43# define BOOST_MPL_PP_IS_SEQ(seq) BOOST_MPL_PP_IS_SEQ_(seq)
44# endif
45
46# define BOOST_MPL_PP_IS_SEQ_(seq) BOOST_PP_CAT(BOOST_MPL_PP_IS_SEQ_, BOOST_MPL_PP_IS_SEQ_0 seq BOOST_PP_RPAREN())
47# define BOOST_MPL_PP_IS_SEQ_0(x) BOOST_MPL_PP_IS_SEQ_1(x
48# define BOOST_MPL_PP_IS_SEQ_ALWAYS_0(unused) 0
49# define BOOST_MPL_PP_IS_SEQ_BOOST_MPL_PP_IS_SEQ_0 BOOST_MPL_PP_IS_SEQ_ALWAYS_0(
50# define BOOST_MPL_PP_IS_SEQ_BOOST_MPL_PP_IS_SEQ_1(unused) 1
51
52#endif
53
54#endif // BOOST_MPL_AUX_PREPROCESSOR_IS_SEQ_HPP_INCLUDED
55