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