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Full merge from trunk at revision 41356 of entire boost-root tree.

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[SVN r41370]
This commit is contained in:
Beman Dawes
2007-11-25 18:38:02 +00:00
parent ed9cb87ac3
commit d57e8cfe9e
455 changed files with 64511 additions and 0 deletions
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72
example/extension/detail/at_key_impl.hpp Normal file
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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(BOOST_FUSION_AT_KEY_IMPL_20060223_2017)
#define BOOST_FUSION_AT_KEY_IMPL_20060223_2017
#include <string>
#include <boost/mpl/if.hpp>
#include <boost/type_traits/is_const.hpp>
namespace fields
{
struct name;
struct age;
}
namespace example
{
struct example_sequence_tag;
}
namespace boost { namespace fusion {
namespace extension
{
template<typename Tag>
struct at_key_impl;
template<>
struct at_key_impl<example::example_sequence_tag>
{
template<typename Sequence, typename Key>
struct apply;
template<typename Sequence>
struct apply<Sequence, fields::name>
{
typedef typename mpl::if_<
is_const<Sequence>,
std::string const&,
std::string&>::type type;
static type
call(Sequence& seq)
{
return seq.name;
};
};
template<typename Sequence>
struct apply<Sequence, fields::age>
{
typedef typename mpl::if_<
is_const<Sequence>,
int const&,
int&>::type type;
static type
call(Sequence& seq)
{
return seq.age;
};
};
};
}
}}
#endif