forked from boostorg/fusion
87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
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/*=============================================================================
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Copyright (c) 1999-2003 Jaakko J<EFBFBD>rvi
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Copyright (c) 1999-2003 Jeremiah Willcock
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Copyright (c) 2001-2006 Joel de Guzman
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_IN_05052005_0121)
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#define FUSION_IN_05052005_0121
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#include <iostream>
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#include <boost/fusion/sequence/io/detail/manip.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/equal_to.hpp>
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namespace boost { namespace fusion { namespace detail
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{
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template <typename Tag>
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struct delimiter_in
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{
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// read a delimiter
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template <typename IS>
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static void
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read(IS& is, char const* delim, mpl::false_ = mpl::false_())
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{
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detail::string_ios_manip<Tag, IS> manip(is);
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manip.read(delim);
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}
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template <typename IS>
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static void
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read(IS& is, char const* delim, mpl::true_)
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{
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}
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};
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struct read_sequence_loop
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{
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template <typename IS, typename First, typename Last>
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static void
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call(IS& is, First const&, Last const&, mpl::true_)
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{
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}
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template <typename IS, typename First, typename Last>
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static void
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call(IS& is, First const& first, Last const& last, mpl::false_)
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{
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result_of::equal_to<
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typename result_of::next<First>::type
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, Last
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>
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is_last;
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is >> *first;
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delimiter_in<tuple_delimiter_tag>::read(is, " ", is_last);
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call(is, fusion::next(first), last, is_last);
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}
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template <typename IS, typename First, typename Last>
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static void
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call(IS& is, First const& first, Last const& last)
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{
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result_of::equal_to<First, Last> eq;
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call(is, first, last, eq);
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}
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};
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template <typename IS, typename Sequence>
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inline void
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read_sequence(IS& is, Sequence& seq)
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{
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delimiter_in<tuple_open_tag>::read(is, "(");
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read_sequence_loop::call(is, fusion::begin(seq), fusion::end(seq));
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delimiter_in<tuple_close_tag>::read(is, ")");
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}
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}}}
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#endif
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