96 lines
3.2 KiB
C++
Executable File
96 lines
3.2 KiB
C++
Executable File
// Copyright (c) 2001-2007 Joel de Guzman
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// Copyright (c) 2001-2008 Hartmut Kaiser
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#if !defined(BOOST_SPIRIT_KARMA_POSITIVE_MAR_03_2007_0945PM)
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#define BOOST_SPIRIT_KARMA_POSITIVE_MAR_03_2007_0945PM
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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#pragma once // MS compatible compilers support #pragma once
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#endif
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#include <boost/spirit/home/support/component.hpp>
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#include <boost/spirit/home/support/detail/container.hpp>
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#include <boost/spirit/home/support/unused.hpp>
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#include <boost/spirit/home/support/attribute_transform.hpp>
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#include <boost/mpl/assert.hpp>
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#include <vector>
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namespace boost { namespace spirit { namespace karma
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{
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struct plus
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{
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template <typename T>
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struct build_attribute_container
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{
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typedef std::vector<T> type;
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};
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template <typename Component, typename Context, typename Iterator>
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struct attribute :
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build_container<plus, Component, Iterator, Context>
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{
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};
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template <typename Component, typename OutputIterator,
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typename Context, typename Delimiter, typename Parameter>
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static bool
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generate(Component const& component, OutputIterator& sink,
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Context& ctx, Delimiter const& d, Parameter const& param)
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{
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typedef typename
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spirit::result_of::subject<Component>::type::director
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director;
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typedef typename
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container::result_of::iterator<Parameter const>::type
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iterator_type;
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iterator_type it = container::begin(param);
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iterator_type end = container::end(param);
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// plus fails if the parameter is empty
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if (it == end)
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return false;
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bool result = true;
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for (/**/; result && !container::compare(it, end);
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container::next(it))
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{
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result = director::generate(spirit::subject(component), sink,
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ctx, d, container::deref(it));
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}
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return result;
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}
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// this kleene has no parameter attached
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// template <typename Component, typename OutputIterator,
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// typename Context, typename Delimiter>
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// static bool
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// generate(Component const&, OutputIterator&, Context&, Delimiter const&,
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// unused_type)
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// {
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// BOOST_MPL_ASSERT_MSG(false, plus_not_usable_without_parameter, ());
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// return false;
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// }
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template <typename Component, typename Context>
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static std::string what(Component const& component, Context const& ctx)
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{
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std::string result = "plus[";
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typedef typename
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spirit::result_of::subject<Component>::type::director
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director;
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result += director::what(spirit::subject(component), ctx);
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result += "]";
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return result;
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}
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};
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}}}
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#endif
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