| // Copyright (c) 2001-2007 Joel de Guzman |
| // Copyright (c) 2001-2009 Hartmut Kaiser |
| // |
| // 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_SPIRIT_KARMA_KLEENE_MAR_03_2007_0337AM) |
| #define BOOST_SPIRIT_KARMA_KLEENE_MAR_03_2007_0337AM |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| #pragma once // MS compatible compilers support #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/component.hpp> |
| #include <boost/spirit/home/support/detail/container.hpp> |
| #include <boost/spirit/home/support/unused.hpp> |
| #include <boost/spirit/home/support/attribute_transform.hpp> |
| |
| #include <vector> |
| |
| namespace boost { namespace spirit { namespace karma |
| { |
| struct kleene |
| { |
| template <typename T> |
| struct build_attribute_container |
| { |
| typedef std::vector<T> type; |
| }; |
| |
| template <typename Component, typename Context, typename Iterator> |
| struct attribute : |
| build_container<kleene, Component, Iterator, Context> |
| { |
| }; |
| |
| template <typename Component, typename OutputIterator, |
| typename Context, typename Delimiter, typename Parameter> |
| static bool |
| generate(Component const& component, OutputIterator& sink, |
| Context& ctx, Delimiter const& d, Parameter const& param) |
| { |
| typedef typename |
| result_of::subject<Component>::type::director |
| director; |
| typedef typename |
| container::result_of::iterator<Parameter const>::type |
| iterator_type; |
| |
| iterator_type it = container::begin(param); |
| iterator_type end = container::end(param); |
| |
| // kleene fails only if the embedded parser fails |
| bool result = true; |
| for (/**/; result && !container::compare(it, end); |
| container::next(it)) |
| { |
| result = director::generate(subject(component), sink, ctx, d, |
| container::deref(it)); |
| } |
| return result; |
| } |
| |
| // this kleene has no parameter attached |
| // template <typename Component, typename OutputIterator, |
| // typename Context, typename Delimiter> |
| // static bool |
| // generate(Component const&, OutputIterator&, Context&, Delimiter const&, |
| // unused_type) |
| // { |
| // BOOST_MPL_ASSERT_MSG(false, kleene_not_usable_without_attribute, ()); |
| // return false; |
| // } |
| |
| template <typename Component, typename Context> |
| static std::string what(Component const& component, Context const& ctx) |
| { |
| std::string result = "kleene["; |
| |
| typedef typename |
| spirit::result_of::subject<Component>::type::director |
| director; |
| |
| result += director::what(spirit::subject(component), ctx); |
| result += "]"; |
| return result; |
| } |
| }; |
| |
| }}} |
| |
| #endif |