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epoc32/include/stdapis/boost/variant/detail/apply_visitor_unary.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100
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 // boost variant/detail/apply_visitor_unary.hpp header file

     3 // See http://www.boost.org for updates, documentation, and revision history.

     4 //-----------------------------------------------------------------------------

     5 //

     6 // Copyright (c) 2002-2003

     7 // Eric Friedman

     8 //

     9 // Distributed under the Boost Software License, Version 1.0. (See

    10 // accompanying file LICENSE_1_0.txt or copy at

    11 // http://www.boost.org/LICENSE_1_0.txt)

    12 

    13 #ifndef BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP

    14 #define BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP

    15 

    16 #include "boost/config.hpp"

    17 #include "boost/detail/workaround.hpp"

    18 #include "boost/variant/detail/generic_result_type.hpp"

    19 

    20 #include "boost/utility/enable_if.hpp"

    21 

    22 namespace boost {

    23 

    24 //////////////////////////////////////////////////////////////////////////

    25 // function template apply_visitor(visitor, visitable)

    26 //

    27 // Visits visitable with visitor.

    28 //

    29 

    30 //

    31 // nonconst-visitor version:

    32 //

    33 

    34 #if !BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302))

    35 

    36 #   define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \

    37     BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \

    38     /**/

    39 

    40 #else // EDG-based compilers

    41 

    42 #   define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \

    43     typename enable_if< \

    44           mpl::not_< is_const< V > > \

    45         , BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \

    46         >::type \

    47     /**/

    48 

    49 #endif // EDG-based compilers workaround

    50 

    51 template <typename Visitor, typename Visitable>

    52 inline

    53     BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(Visitor)

    54 apply_visitor(Visitor& visitor, Visitable& visitable)

    55 {

    56     return visitable.apply_visitor(visitor);

    57 }

    58 

    59 #undef BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE

    60 

    61 //

    62 // const-visitor version:

    63 //

    64 

    65 #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)

    66 

    67 template <typename Visitor, typename Visitable>

    68 inline

    69     BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename Visitor::result_type)

    70 apply_visitor(const Visitor& visitor, Visitable& visitable)

    71 {

    72     return visitable.apply_visitor(visitor);

    73 }

    74 

    75 #endif // MSVC7 and below exclusion

    76 

    77 } // namespace boost

    78 

    79 #endif // BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP
test