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epoc32/include/stdapis/boost/mpl/aux_/na.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100 (2010-03-31)
branchSymbian2
changeset 3 e1b950c65cb4
permissions -rw-r--r--
Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations 
     1 

     2 #ifndef BOOST_MPL_AUX_NA_HPP_INCLUDED

     3 #define BOOST_MPL_AUX_NA_HPP_INCLUDED

     4 

     5 // Copyright Aleksey Gurtovoy 2001-2004

     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/aux_/na.hpp,v $

    14 // $Date: 2004/11/28 01:37:30 $

    15 // $Revision: 1.6 $

    16 

    17 #include <boost/mpl/bool.hpp>

    18 #include <boost/mpl/aux_/na_fwd.hpp>

    19 #include <boost/mpl/aux_/config/msvc.hpp>

    20 #include <boost/mpl/aux_/config/ctps.hpp>

    21 

    22 namespace boost { namespace mpl {

    23 

    24 template< typename T >

    25 struct is_na

    26     : false_

    27 {

    28 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)

    29     using false_::value;

    30 #endif

    31 };

    32 

    33 template<>

    34 struct is_na<na>

    35     : true_

    36 {

    37 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)

    38     using true_::value;

    39 #endif

    40 };

    41 

    42 template< typename T >

    43 struct is_not_na

    44     : true_

    45 {

    46 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)

    47     using true_::value;

    48 #endif

    49 };

    50 

    51 template<>

    52 struct is_not_na<na>

    53     : false_

    54 {

    55 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)

    56     using false_::value;

    57 #endif

    58 };

    59 

    60 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

    61 template< typename T, typename U > struct if_na

    62 {

    63     typedef T type;

    64 };

    65 

    66 template< typename U > struct if_na<na,U>

    67 {

    68     typedef U type;

    69 };

    70 #else

    71 template< typename T > struct if_na_impl

    72 {

    73     template< typename U > struct apply

    74     {

    75         typedef T type;

    76     };

    77 };

    78 

    79 template<> struct if_na_impl<na>

    80 {

    81     template< typename U > struct apply

    82     {

    83         typedef U type;

    84     };

    85 };

    86 

    87 template< typename T, typename U > struct if_na

    88     : if_na_impl<T>::template apply<U>

    89 {

    90 };

    91 #endif

    92 

    93 }}

    94 

    95 #endif // BOOST_MPL_AUX_NA_HPP_INCLUDED
test