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Initial move from Spirit CVS

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[SVN r34896]
This commit is contained in:
Joel de Guzman
2006-08-16 16:50:52 +00:00
commit 75b9d13a88
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include/boost/fusion/sequence/io/detail/in.hpp Normal file
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/*=============================================================================
Copyright (c) 1999-2003 Jaakko J<>rvi
Copyright (c) 1999-2003 Jeremiah Willcock
Copyright (c) 2001-2006 Joel de Guzman
Use, modification and distribution is subject to 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(FUSION_IN_05052005_0121)
#define FUSION_IN_05052005_0121
#include <iostream>
#include <boost/fusion/sequence/io/detail/manip.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/fusion/sequence/intrinsic/begin.hpp>
#include <boost/fusion/sequence/intrinsic/end.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/next.hpp>
#include <boost/fusion/iterator/equal_to.hpp>
namespace boost { namespace fusion { namespace detail
{
template <typename Tag>
struct delimiter_in
{
// read a delimiter
template <typename IS>
static void
read(IS& is, char const* delim, mpl::false_ = mpl::false_())
{
detail::string_ios_manip<Tag, IS> manip(is);
manip.read(delim);
}
template <typename IS>
static void
read(IS& is, char const* delim, mpl::true_)
{
}
};
struct read_sequence_loop
{
template <typename IS, typename First, typename Last>
static void
call(IS& is, First const&, Last const&, mpl::true_)
{
}
template <typename IS, typename First, typename Last>
static void
call(IS& is, First const& first, Last const& last, mpl::false_)
{
result_of::equal_to<
typename result_of::next<First>::type
, Last
>
is_last;
is >> *first;
delimiter_in<tuple_delimiter_tag>::read(is, " ", is_last);
call(is, fusion::next(first), last, is_last);
}
template <typename IS, typename First, typename Last>
static void
call(IS& is, First const& first, Last const& last)
{
result_of::equal_to<First, Last> eq;
call(is, first, last, eq);
}
};
template <typename IS, typename Sequence>
inline void
read_sequence(IS& is, Sequence& seq)
{
delimiter_in<tuple_open_tag>::read(is, "(");
read_sequence_loop::call(is, fusion::begin(seq), fusion::end(seq));
delimiter_in<tuple_close_tag>::read(is, ")");
}
}}}
#endif