epoc32/include/stdapis/boost/mpl/is_sequence.hpp
author William Roberts <williamr@symbian.org>
Tue, 16 Mar 2010 16:12:26 +0000
branchSymbian2
changeset 2 2fe1408b6811
permissions -rw-r--r--
Final list of Symbian^2 public API header files
     1 
     2 #ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
     3 #define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
     4 
     5 // Copyright Aleksey Gurtovoy 2002-2004
     6 //
     7 // Distributed under the Boost Software License, Version 1.0. 
     8 // (See accompanying file LICENSE_1_0.txt or copy at 
     9 // http://www.boost.org/LICENSE_1_0.txt)
    10 //
    11 // See http://www.boost.org/libs/mpl for documentation.
    12 
    13 // $Source: /cvsroot/boost/boost/boost/mpl/is_sequence.hpp,v $
    14 // $Date: 2005/08/25 16:27:21 $
    15 // $Revision: 1.9 $
    16 
    17 #include <boost/mpl/not.hpp>
    18 #include <boost/mpl/and.hpp>
    19 #include <boost/mpl/begin_end.hpp>
    20 #include <boost/mpl/if.hpp>
    21 #include <boost/mpl/bool.hpp>
    22 #include <boost/mpl/sequence_tag_fwd.hpp>
    23 #include <boost/mpl/identity.hpp>
    24 #include <boost/mpl/void.hpp>
    25 #include <boost/mpl/aux_/has_tag.hpp>
    26 #include <boost/mpl/aux_/has_begin.hpp>
    27 #include <boost/mpl/aux_/na_spec.hpp>
    28 #include <boost/mpl/aux_/lambda_support.hpp>
    29 #include <boost/mpl/aux_/config/eti.hpp>
    30 #include <boost/mpl/aux_/config/msvc.hpp>
    31 #include <boost/mpl/aux_/config/workaround.hpp>
    32 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
    33 #   include <boost/mpl/aux_/msvc_is_class.hpp>
    34 #elif BOOST_WORKAROUND(BOOST_MSVC, == 1300)
    35 #   include <boost/type_traits/is_class.hpp>
    36 #endif
    37 
    38 #include <boost/type_traits/is_same.hpp>
    39 
    40 namespace boost { namespace mpl {
    41 
    42 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
    43 
    44 namespace aux {
    45 
    46 // agurt, 11/jun/03: 
    47 // MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a
    48 // 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >'
    49 // would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds
    50 // the issue for most real-world cases
    51 template< typename T > struct is_sequence_impl
    52     : and_<
    53           identity< aux::has_tag<T> >
    54         , identity< aux::has_begin<T> >
    55         >
    56 {
    57 };
    58 
    59 } // namespace aux
    60         
    61 template<
    62       typename BOOST_MPL_AUX_NA_PARAM(T)
    63     >
    64 struct is_sequence
    65     : if_<
    66 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
    67           aux::msvc_is_class<T> 
    68 #else
    69           boost::is_class<T> 
    70 #endif
    71         , aux::is_sequence_impl<T>
    72         , bool_<false>
    73         >::type
    74 {
    75     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
    76 };
    77 
    78 #elif defined(BOOST_MPL_CFG_NO_HAS_XXX)
    79 
    80 template<
    81       typename BOOST_MPL_AUX_NA_PARAM(T)
    82     >
    83 struct is_sequence
    84     : bool_<false>
    85 {
    86 };
    87 
    88 #else
    89 
    90 template<
    91       typename BOOST_MPL_AUX_NA_PARAM(T)
    92     >
    93 struct is_sequence
    94     : not_< is_same< typename begin<T>::type, void_ > >
    95 {
    96     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
    97 };
    98 
    99 #endif // BOOST_MSVC
   100 
   101 #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
   102 template<> struct is_sequence<int>
   103     : bool_<false>
   104 {
   105 };
   106 #endif
   107 
   108 BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence)
   109 
   110 }}
   111 
   112 #endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED