test: epoc32/include/stdapis/boost/mpl/aux_/begin_end

     2 #ifndef BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED

     3 #define BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED

     5 // Copyright Aleksey Gurtovoy 2000-2004

     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.

    13 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/begin_end_impl.hpp,v $

    14 // $Date: 2006/07/22 15:08:37 $

    15 // $Revision: 1.8.14.1 $

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

    18 #include <boost/mpl/sequence_tag_fwd.hpp>

    19 #include <boost/mpl/void.hpp>

    20 #include <boost/mpl/eval_if.hpp>

    21 #include <boost/mpl/aux_/has_begin.hpp>

    22 #include <boost/mpl/aux_/na.hpp>

    23 #include <boost/mpl/aux_/traits_lambda_spec.hpp>

    24 #include <boost/mpl/aux_/config/eti.hpp>

    26 namespace boost { namespace mpl {

    28 namespace aux {

    30 template< typename Sequence >

    31 struct begin_type

    32 {

    33     typedef typename Sequence::begin type;

    34 };

    35 template< typename Sequence >

    36 struct end_type

    37 {

    38     typedef typename Sequence::end type;

    39 };

    41 }

    43 // default implementation; conrete sequences might override it by

    44 // specializing either the 'begin_impl/end_impl' or the primary

    45 // 'begin/end' templates

    47 template< typename Tag >

    48 struct begin_impl

    49 {

    50     template< typename Sequence > struct apply

    51     {

    52         typedef typename eval_if<aux::has_begin<Sequence, true_>,

    53                                  aux::begin_type<Sequence>, void_>::type type;

    54     };

    55 };

    57 template< typename Tag >

    58 struct end_impl

    59 {

    60     template< typename Sequence > struct apply

    61     {

    62         typedef typename eval_if<aux::has_begin<Sequence, true_>,

    63                                  aux::end_type<Sequence>, void_>::type type;

    64     };

    65 };

    67 // specialize 'begin_trait/end_trait' for two pre-defined tags

    69 #   define AUX778076_IMPL_SPEC(name, tag, result) \

    70 template<> \

    71 struct name##_impl<tag> \

    72 { \

    73     template< typename Sequence > struct apply \

    74     { \

    75         typedef result type; \

    76     }; \

    77 }; \

    78 /**/

    80 // a sequence with nested 'begin/end' typedefs; just query them

    81 AUX778076_IMPL_SPEC(begin, nested_begin_end_tag, typename Sequence::begin)

    82 AUX778076_IMPL_SPEC(end, nested_begin_end_tag, typename Sequence::end)

    84 // if a type 'T' does not contain 'begin/end' or 'tag' members

    85 // and doesn't specialize either 'begin/end' or 'begin_impl/end_impl'

    86 // templates, then we end up here

    87 AUX778076_IMPL_SPEC(begin, non_sequence_tag, void_)

    88 AUX778076_IMPL_SPEC(end, non_sequence_tag, void_)

    89 AUX778076_IMPL_SPEC(begin, na, void_)

    90 AUX778076_IMPL_SPEC(end, na, void_)

    92 #   undef AUX778076_IMPL_SPEC

    95 BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1,begin_impl)

    96 BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1,end_impl)

    98 }}

   100 #endif // BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED

author	William Roberts <williamr@symbian.org>
	Wed, 31 Mar 2010 12:33:34 +0100
branch	Symbian3
changeset 4	837f303aceeb
parent 3	e1b950c65cb4
permissions	-rw-r--r--