/*=============================================================================
Copyright (c) 1999-2003 Jaakko Järvi
Copyright (c) 1999-2003 Jeremiah Willcock
Copyright (c) 2001-2003 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_SEQUENCE_DETAIL_IO_HPP)
#define FUSION_SEQUENCE_DETAIL_IO_HPP
#include <iostream>
#include <boost/spirit/fusion/sequence/detail/manip.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/spirit/fusion/sequence/begin.hpp>
#include <boost/spirit/fusion/sequence/end.hpp>
#include <boost/spirit/fusion/iterator/deref.hpp>
#include <boost/spirit/fusion/iterator/next.hpp>
#include <boost/spirit/fusion/iterator/equal_to.hpp>
namespace boost { namespace fusion { namespace detail
{
template <typename Tag>
struct delimiter_io
{
// print a delimiter
template <typename OS>
static void
print(OS& os, char const* delim, mpl::false_ = mpl::false_())
{
detail::string_ios_manip<Tag, OS> manip(os);
manip.print(delim);
}
template <typename OS>
static void
print(OS& os, char const* delim, mpl::true_)
{
}
// 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 print_sequence_loop
{
template <typename OS, typename First, typename Last>
static void
call(OS& os, First const&, Last const&, mpl::true_)
{
}
template <typename OS, typename First, typename Last>
static void
call(OS& os, First const& first, Last const& last, mpl::false_)
{
meta::equal_to<
BOOST_DEDUCED_TYPENAME meta::next<First>::type
, Last
>
is_last;
os << *first;
delimiter_io<tuple_delimiter_tag>::print(os, " ", is_last);
call(os, fusion::next(first), last, is_last);
}
template <typename OS, typename First, typename Last>
static void
call(OS& os, First const& first, Last const& last)
{
meta::equal_to<First, Last> eq;
call(os, first, last, eq);
}
};
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_)
{
meta::equal_to<
BOOST_DEDUCED_TYPENAME meta::next<First>::type
, Last
>
is_last;
is >> *first;
delimiter_io<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)
{
meta::equal_to<First, Last> eq;
call(is, first, last, eq);
}
};
template <typename OS, typename Sequence>
inline void
print_sequence(OS& os, Sequence const& seq)
{
delimiter_io<tuple_open_tag>::print(os, "(");
print_sequence_loop::call(os, fusion::begin(seq), fusion::end(seq));
delimiter_io<tuple_close_tag>::print(os, ")");
}
template <typename IS, typename Sequence>
inline void
read_sequence(IS& is, Sequence& seq)
{
delimiter_io<tuple_open_tag>::read(is, "(");
read_sequence_loop::call(is, fusion::begin(seq), fusion::end(seq));
delimiter_io<tuple_close_tag>::read(is, ")");
}
}}}
#endif