[ceph.git] / ceph / src / boost / boost / spirit / home / karma / directive / repeat.hpp

//  Copyright (c) 2001-2011 Hartmut Kaiser
//  Copyright (c) 2001-2011 Joel de Guzman
//
//  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(SPIRIT_KARMA_REPEAT_MAY_18_2009_0926AM)
#define SPIRIT_KARMA_REPEAT_MAY_18_2009_0926AM

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/spirit/home/karma/meta_compiler.hpp>
#include <boost/spirit/home/karma/detail/output_iterator.hpp>
#include <boost/spirit/home/karma/detail/get_stricttag.hpp>
#include <boost/spirit/home/karma/generator.hpp>
#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
#include <boost/spirit/home/karma/operator/kleene.hpp>
#include <boost/spirit/home/support/container.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/support/has_semantic_action.hpp>
#include <boost/spirit/home/support/handles_container.hpp>
#include <boost/spirit/home/karma/detail/attributes.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/fusion/include/at.hpp>

namespace boost { namespace spirit
{
    ///////////////////////////////////////////////////////////////////////////
    // Enablers
    ///////////////////////////////////////////////////////////////////////////
    template <>
    struct use_directive<karma::domain, tag::repeat>   // enables repeat[p]
      : mpl::true_ {};

    template <typename T>
    struct use_directive<karma::domain
      , terminal_ex<tag::repeat                     // enables repeat(exact)[p]
        , fusion::vector1<T> >
    > : mpl::true_ {};

    template <typename T>
    struct use_directive<karma::domain
      , terminal_ex<tag::repeat                     // enables repeat(min, max)[p]
        , fusion::vector2<T, T> >
    > : mpl::true_ {};

    template <typename T>
    struct use_directive<karma::domain
      , terminal_ex<tag::repeat                     // enables repeat(min, inf)[p]
        , fusion::vector2<T, inf_type> >
    > : mpl::true_ {};

    template <>                                     // enables *lazy* repeat(exact)[p]
    struct use_lazy_directive<
        karma::domain
      , tag::repeat
      , 1 // arity
    > : mpl::true_ {};

    template <>                                     // enables *lazy* repeat(min, max)[p]
    struct use_lazy_directive<                      // and repeat(min, inf)[p]
        karma::domain
      , tag::repeat
      , 2 // arity
    > : mpl::true_ {};
}}

namespace boost { namespace spirit { namespace karma
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
    using spirit::repeat;
    using spirit::inf;
#endif
    using spirit::repeat_type;
    using spirit::inf_type;

    ///////////////////////////////////////////////////////////////////////////
    // handles repeat(exact)[p]
    template <typename T>
    struct exact_iterator
    {
        exact_iterator(T const exact)
          : exact(exact) {}

        typedef T type;
        T start() const { return 0; }
        bool got_max(T i) const { return i >= exact; }
        bool got_min(T i) const { return i >= exact; }

        T const exact;

        // silence MSVC warning C4512: assignment operator could not be generated
        BOOST_DELETED_FUNCTION(exact_iterator& operator= (exact_iterator const&))
    };

    // handles repeat(min, max)[p]
    template <typename T>
    struct finite_iterator
    {
        finite_iterator(T const min, T const max)
          : min BOOST_PREVENT_MACRO_SUBSTITUTION (min)
          , max BOOST_PREVENT_MACRO_SUBSTITUTION (max) {}

        typedef T type;
        T start() const { return 0; }
        bool got_max(T i) const { return i >= max; }
        bool got_min(T i) const { return i >= min; }

        T const min;
        T const max;

        // silence MSVC warning C4512: assignment operator could not be generated
        BOOST_DELETED_FUNCTION(finite_iterator& operator= (finite_iterator const&))
    };

    // handles repeat(min, inf)[p]
    template <typename T>
    struct infinite_iterator
    {
        infinite_iterator(T const min)
          : min BOOST_PREVENT_MACRO_SUBSTITUTION (min) {}

        typedef T type;
        T start() const { return 0; }
        bool got_max(T /*i*/) const { return false; }
        bool got_min(T i) const { return i >= min; }

        T const min;

        // silence MSVC warning C4512: assignment operator could not be generated
        BOOST_DELETED_FUNCTION(infinite_iterator& operator= (infinite_iterator const&))
    };

    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename LoopIter, typename Strict
      , typename Derived>
    struct base_repeat_generator : unary_generator<Derived>
    {
    private:
        // iterate over the given container until its exhausted or the embedded
        // generator succeeds
        template <typename F, typename Attribute>
        bool generate_subject(F f, Attribute const&, mpl::false_) const
        {
            // Failing subject generators are just skipped. This allows to 
            // selectively generate items in the provided attribute.
            while (!f.is_at_end())
            {
                bool r = !f(subject);
                if (r) 
                    return true;
                if (!f.is_at_end())
                    f.next();
            }
            return false;
        }

        template <typename F, typename Attribute>
        bool generate_subject(F f, Attribute const&, mpl::true_) const
        {
            return !f(subject);
        }

        // There is no way to distinguish a failed generator from a 
        // generator to be skipped. We assume the user takes responsibility
        // for ending the loop if no attribute is specified.
        template <typename F>
        bool generate_subject(F f, unused_type, mpl::false_) const
        {
            return !f(subject);
        }

    public:
        typedef Subject subject_type;

        typedef mpl::int_<subject_type::properties::value> properties;

        // Build a std::vector from the subject's attribute. Note
        // that build_std_vector may return unused_type if the
        // subject's attribute is an unused_type.
        template <typename Context, typename Iterator>
        struct attribute
          : traits::build_std_vector<
                typename traits::attribute_of<Subject, Context, Iterator>::type
            >
        {};

        base_repeat_generator(Subject const& subject, LoopIter const& iter)
          : subject(subject), iter(iter) {}

        template <typename OutputIterator, typename Context, typename Delimiter
          , typename Attribute>
        bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
          , Attribute const& attr) const
        {
            typedef detail::fail_function<
                OutputIterator, Context, Delimiter
            > fail_function;

            typedef typename traits::container_iterator<
                typename add_const<Attribute>::type
            >::type iterator_type;

            typedef 
                typename traits::make_indirect_iterator<iterator_type>::type 
            indirect_iterator_type;

            typedef detail::pass_container<
                fail_function, Attribute, indirect_iterator_type, mpl::false_>
            pass_container;

            iterator_type it = traits::begin(attr);
            iterator_type end = traits::end(attr);

            pass_container pass(fail_function(sink, ctx, d), 
                indirect_iterator_type(it), indirect_iterator_type(end));

            // generate the minimal required amount of output
            typename LoopIter::type i = iter.start();
            for (/**/; !pass.is_at_end() && !iter.got_min(i); ++i)
            {
                if (!generate_subject(pass, attr, Strict()))
                {
                    // if we fail before reaching the minimum iteration
                    // required, do not output anything and return false
                    return false;
                }
            }

            if (pass.is_at_end() && !iter.got_min(i))
                return false;   // insufficient attribute elements

            // generate some more up to the maximum specified
            for (/**/; !pass.is_at_end() && !iter.got_max(i); ++i)
            {
                if (!generate_subject(pass, attr, Strict()))
                    break;
            }
            return detail::sink_is_good(sink);
        }

        template <typename Context>
        info what(Context& context) const
        {
            return info("repeat", subject.what(context));
        }

        Subject subject;
        LoopIter iter;
    };

    template <typename Subject, typename LoopIter>
    struct repeat_generator 
      : base_repeat_generator<
            Subject, LoopIter, mpl::false_
          , repeat_generator<Subject, LoopIter> >
    {
        typedef base_repeat_generator<
            Subject, LoopIter, mpl::false_, repeat_generator
        > base_repeat_generator_;

        repeat_generator(Subject const& subject, LoopIter const& iter)
          : base_repeat_generator_(subject, iter) {}
    };

    template <typename Subject, typename LoopIter>
    struct strict_repeat_generator 
      : base_repeat_generator<
            Subject, LoopIter, mpl::true_
          , strict_repeat_generator<Subject, LoopIter> >
    {
        typedef base_repeat_generator<
            Subject, LoopIter, mpl::true_, strict_repeat_generator
        > base_repeat_generator_;

        strict_repeat_generator(Subject const& subject, LoopIter const& iter)
          : base_repeat_generator_(subject, iter) {}
    };

    ///////////////////////////////////////////////////////////////////////////
    // Generator generators: make_xxx function (objects)
    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename Modifiers>
    struct make_directive<tag::repeat, Subject, Modifiers>
    {
        typedef typename mpl::if_<
            detail::get_stricttag<Modifiers>
          , strict_kleene<Subject>, kleene<Subject>
        >::type result_type;

        result_type operator()(unused_type, Subject const& subject
          , unused_type) const
        {
            return result_type(subject);
        }
    };

    template <typename T, typename Subject, typename Modifiers>
    struct make_directive<
        terminal_ex<tag::repeat, fusion::vector1<T> >, Subject, Modifiers>
    {
        typedef exact_iterator<T> iterator_type;

        typedef typename mpl::if_<
            detail::get_stricttag<Modifiers>
          , strict_repeat_generator<Subject, iterator_type>
          , repeat_generator<Subject, iterator_type>
        >::type result_type;

        template <typename Terminal>
        result_type operator()(
            Terminal const& term, Subject const& subject, unused_type) const
        {
            return result_type(subject, fusion::at_c<0>(term.args));
        }
    };

    template <typename T, typename Subject, typename Modifiers>
    struct make_directive<
        terminal_ex<tag::repeat, fusion::vector2<T, T> >, Subject, Modifiers>
    {
        typedef finite_iterator<T> iterator_type;

        typedef typename mpl::if_<
            detail::get_stricttag<Modifiers>
          , strict_repeat_generator<Subject, iterator_type>
          , repeat_generator<Subject, iterator_type>
        >::type result_type;

        template <typename Terminal>
        result_type operator()(
            Terminal const& term, Subject const& subject, unused_type) const
        {
            return result_type(subject,
                iterator_type(
                    fusion::at_c<0>(term.args)
                  , fusion::at_c<1>(term.args)
                )
            );
        }
    };

    template <typename T, typename Subject, typename Modifiers>
    struct make_directive<
        terminal_ex<tag::repeat
        , fusion::vector2<T, inf_type> >, Subject, Modifiers>
    {
        typedef infinite_iterator<T> iterator_type;

        typedef typename mpl::if_<
            detail::get_stricttag<Modifiers>
          , strict_repeat_generator<Subject, iterator_type>
          , repeat_generator<Subject, iterator_type>
        >::type result_type;

        template <typename Terminal>
        result_type operator()(
            Terminal const& term, Subject const& subject, unused_type) const
        {
            return result_type(subject, fusion::at_c<0>(term.args));
        }
    };
}}}

namespace boost { namespace spirit { namespace traits
{
    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename LoopIter>
    struct has_semantic_action<karma::repeat_generator<Subject, LoopIter> >
      : unary_has_semantic_action<Subject> {};

    template <typename Subject, typename LoopIter>
    struct has_semantic_action<karma::strict_repeat_generator<Subject, LoopIter> >
      : unary_has_semantic_action<Subject> {};

    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename LoopIter, typename Attribute
      , typename Context, typename Iterator>
    struct handles_container<
            karma::repeat_generator<Subject, LoopIter>, Attribute
          , Context, Iterator> 
      : mpl::true_ {};

    template <typename Subject, typename LoopIter, typename Attribute
      , typename Context, typename Iterator>
    struct handles_container<
            karma::strict_repeat_generator<Subject, LoopIter>, Attribute
          , Context, Iterator> 
      : mpl::true_ {};
}}}

#endif
Commit	Line	Data
7c673cae FG	1	// Copyright (c) 2001-2011 Hartmut Kaiser
	2	// Copyright (c) 2001-2011 Joel de Guzman
	3	//
	4	// Distributed under the Boost Software License, Version 1.0. (See accompanying
	5	// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
	6
	7	#if !defined(SPIRIT_KARMA_REPEAT_MAY_18_2009_0926AM)
	8	#define SPIRIT_KARMA_REPEAT_MAY_18_2009_0926AM
	9
	10	#if defined(_MSC_VER)
	11	#pragma once
	12	#endif
	13
	14	#include <boost/spirit/home/karma/meta_compiler.hpp>
	15	#include <boost/spirit/home/karma/detail/output_iterator.hpp>
	16	#include <boost/spirit/home/karma/detail/get_stricttag.hpp>
	17	#include <boost/spirit/home/karma/generator.hpp>
	18	#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
	19	#include <boost/spirit/home/karma/operator/kleene.hpp>
	20	#include <boost/spirit/home/support/container.hpp>
	21	#include <boost/spirit/home/support/common_terminals.hpp>
	22	#include <boost/spirit/home/support/has_semantic_action.hpp>
	23	#include <boost/spirit/home/support/handles_container.hpp>
	24	#include <boost/spirit/home/karma/detail/attributes.hpp>
	25	#include <boost/spirit/home/support/info.hpp>
	26	#include <boost/fusion/include/at.hpp>
	27
	28	namespace boost { namespace spirit
	29	{
	30	///////////////////////////////////////////////////////////////////////////
	31	// Enablers
	32	///////////////////////////////////////////////////////////////////////////
	33	template <>
	34	struct use_directive<karma::domain, tag::repeat> // enables repeat[p]
	35	: mpl::true_ {};
	36
	37	template <typename T>
	38	struct use_directive<karma::domain
	39	, terminal_ex<tag::repeat // enables repeat(exact)[p]
	40	, fusion::vector1<T> >
	41	> : mpl::true_ {};
	42
	43	template <typename T>
	44	struct use_directive<karma::domain
	45	, terminal_ex<tag::repeat // enables repeat(min, max)[p]
	46	, fusion::vector2<T, T> >
	47	> : mpl::true_ {};
	48
	49	template <typename T>
	50	struct use_directive<karma::domain
	51	, terminal_ex<tag::repeat // enables repeat(min, inf)[p]
	52	, fusion::vector2<T, inf_type> >
	53	> : mpl::true_ {};
	54
	55	template <> // enables lazy repeat(exact)[p]
	56	struct use_lazy_directive<
	57	karma::domain
	58	, tag::repeat
	59	, 1 // arity
	60	> : mpl::true_ {};
	61
	62	template <> // enables lazy repeat(min, max)[p]
	63	struct use_lazy_directive< // and repeat(min, inf)[p]
	64	karma::domain
65	, tag::repeat
66	, 2 // arity
67	> : mpl::true_ {};
68	}}
69
70	namespace boost { namespace spirit { namespace karma
71	{
72	#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
73	using spirit::repeat;
74	using spirit::inf;
75	#endif
76	using spirit::repeat_type;
77	using spirit::inf_type;
78
79	///////////////////////////////////////////////////////////////////////////
80	// handles repeat(exact)[p]
81	template <typename T>
82	struct exact_iterator
83	{
84	exact_iterator(T const exact)
85	: exact(exact) {}
86
87	typedef T type;
88	T start() const { return 0; }
89	bool got_max(T i) const { return i >= exact; }
90	bool got_min(T i) const { return i >= exact; }
91
92	T const exact;
93
7c673cae	94	// silence MSVC warning C4512: assignment operator could not be generated
92f5a8d4	95	BOOST_DELETED_FUNCTION(exact_iterator& operator= (exact_iterator const&))
7c673cae FG	96	};
	97
	98	// handles repeat(min, max)[p]
	99	template <typename T>
	100	struct finite_iterator
	101	{
	102	finite_iterator(T const min, T const max)
	103	: min BOOST_PREVENT_MACRO_SUBSTITUTION (min)
	104	, max BOOST_PREVENT_MACRO_SUBSTITUTION (max) {}
	105
	106	typedef T type;
	107	T start() const { return 0; }
	108	bool got_max(T i) const { return i >= max; }
	109	bool got_min(T i) const { return i >= min; }
	110
	111	T const min;
	112	T const max;
	113
7c673cae	114	// silence MSVC warning C4512: assignment operator could not be generated
92f5a8d4	115	BOOST_DELETED_FUNCTION(finite_iterator& operator= (finite_iterator const&))
7c673cae FG	116	};
	117
	118	// handles repeat(min, inf)[p]
	119	template <typename T>
	120	struct infinite_iterator
	121	{
	122	infinite_iterator(T const min)
	123	: min BOOST_PREVENT_MACRO_SUBSTITUTION (min) {}
	124
	125	typedef T type;
	126	T start() const { return 0; }
	127	bool got_max(T /i/) const { return false; }
	128	bool got_min(T i) const { return i >= min; }
	129
	130	T const min;
	131
7c673cae	132	// silence MSVC warning C4512: assignment operator could not be generated
92f5a8d4	133	BOOST_DELETED_FUNCTION(infinite_iterator& operator= (infinite_iterator const&))
7c673cae FG	134	};
	135
	136	///////////////////////////////////////////////////////////////////////////
	137	template <typename Subject, typename LoopIter, typename Strict
	138	, typename Derived>
	139	struct base_repeat_generator : unary_generator<Derived>
	140	{
	141	private:
	142	// iterate over the given container until its exhausted or the embedded
	143	// generator succeeds
	144	template <typename F, typename Attribute>
	145	bool generate_subject(F f, Attribute const&, mpl::false_) const
	146	{
	147	// Failing subject generators are just skipped. This allows to
	148	// selectively generate items in the provided attribute.
	149	while (!f.is_at_end())
	150	{
	151	bool r = !f(subject);
	152	if (r)
	153	return true;
	154	if (!f.is_at_end())
	155	f.next();
	156	}
	157	return false;
	158	}
	159
	160	template <typename F, typename Attribute>
	161	bool generate_subject(F f, Attribute const&, mpl::true_) const
	162	{
	163	return !f(subject);
	164	}
	165
	166	// There is no way to distinguish a failed generator from a
	167	// generator to be skipped. We assume the user takes responsibility
	168	// for ending the loop if no attribute is specified.
	169	template <typename F>
	170	bool generate_subject(F f, unused_type, mpl::false_) const
	171	{
	172	return !f(subject);
	173	}
	174
	175	public:
	176	typedef Subject subject_type;
	177
	178	typedef mpl::int_<subject_type::properties::value> properties;
	179
	180	// Build a std::vector from the subject's attribute. Note
	181	// that build_std_vector may return unused_type if the
	182	// subject's attribute is an unused_type.
	183	template <typename Context, typename Iterator>
	184	struct attribute
	185	: traits::build_std_vector<
	186	typename traits::attribute_of<Subject, Context, Iterator>::type
	187	>
	188	{};
	189
	190	base_repeat_generator(Subject const& subject, LoopIter const& iter)
	191	: subject(subject), iter(iter) {}
	192
	193	template <typename OutputIterator, typename Context, typename Delimiter
	194	, typename Attribute>
	195	bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
	196	, Attribute const& attr) const
	197	{
198	typedef detail::fail_function<
199	OutputIterator, Context, Delimiter
200	> fail_function;
201
202	typedef typename traits::container_iterator<
203	typename add_const<Attribute>::type
204	>::type iterator_type;
205
206	typedef
207	typename traits::make_indirect_iterator<iterator_type>::type
208	indirect_iterator_type;
209
210	typedef detail::pass_container<
211	fail_function, Attribute, indirect_iterator_type, mpl::false_>
212	pass_container;
213
214	iterator_type it = traits::begin(attr);
215	iterator_type end = traits::end(attr);
216
217	pass_container pass(fail_function(sink, ctx, d),
218	indirect_iterator_type(it), indirect_iterator_type(end));
219
220	// generate the minimal required amount of output
221	typename LoopIter::type i = iter.start();
222	for (/**/; !pass.is_at_end() && !iter.got_min(i); ++i)
223	{
224	if (!generate_subject(pass, attr, Strict()))
225	{
226	// if we fail before reaching the minimum iteration
227	// required, do not output anything and return false
228	return false;
229	}
230	}
231
232	if (pass.is_at_end() && !iter.got_min(i))
233	return false; // insufficient attribute elements
234
235	// generate some more up to the maximum specified
236	for (/**/; !pass.is_at_end() && !iter.got_max(i); ++i)
237	{
238	if (!generate_subject(pass, attr, Strict()))
239	break;
240	}
241	return detail::sink_is_good(sink);
242	}
243
244	template <typename Context>
245	info what(Context& context) const
246	{
247	return info("repeat", subject.what(context));
248	}
249
250	Subject subject;
251	LoopIter iter;
252	};
253
254	template <typename Subject, typename LoopIter>
255	struct repeat_generator
256	: base_repeat_generator<
257	Subject, LoopIter, mpl::false_
258	, repeat_generator<Subject, LoopIter> >
259	{
260	typedef base_repeat_generator<
261	Subject, LoopIter, mpl::false_, repeat_generator
262	> base_repeat_generator_;
263
264	repeat_generator(Subject const& subject, LoopIter const& iter)
265	: base_repeat_generator_(subject, iter) {}
266	};
267
268	template <typename Subject, typename LoopIter>
269	struct strict_repeat_generator
270	: base_repeat_generator<
271	Subject, LoopIter, mpl::true_
272	, strict_repeat_generator<Subject, LoopIter> >
273	{
274	typedef base_repeat_generator<
275	Subject, LoopIter, mpl::true_, strict_repeat_generator
276	> base_repeat_generator_;
277
278	strict_repeat_generator(Subject const& subject, LoopIter const& iter)
279	: base_repeat_generator_(subject, iter) {}
280	};
281
282	///////////////////////////////////////////////////////////////////////////
283	// Generator generators: make_xxx function (objects)
284	///////////////////////////////////////////////////////////////////////////
285	template <typename Subject, typename Modifiers>
286	struct make_directive<tag::repeat, Subject, Modifiers>
287	{
288	typedef typename mpl::if_<
289	detail::get_stricttag<Modifiers>
290	, strict_kleene<Subject>, kleene<Subject>
291	>::type result_type;
292
293	result_type operator()(unused_type, Subject const& subject
294	, unused_type) const
295	{
296	return result_type(subject);
297	}
298	};
299
300	template <typename T, typename Subject, typename Modifiers>
301	struct make_directive<
302	terminal_ex<tag::repeat, fusion::vector1<T> >, Subject, Modifiers>
303	{
304	typedef exact_iterator<T> iterator_type;
305
306	typedef typename mpl::if_<
307	detail::get_stricttag<Modifiers>
308	, strict_repeat_generator<Subject, iterator_type>
309	, repeat_generator<Subject, iterator_type>
310	>::type result_type;
311
312	template <typename Terminal>
313	result_type operator()(
314	Terminal const& term, Subject const& subject, unused_type) const
315	{
316	return result_type(subject, fusion::at_c<0>(term.args));
317	}
318	};
319
320	template <typename T, typename Subject, typename Modifiers>
321	struct make_directive<
322	terminal_ex<tag::repeat, fusion::vector2<T, T> >, Subject, Modifiers>
323	{
324	typedef finite_iterator<T> iterator_type;
325
326	typedef typename mpl::if_<
327	detail::get_stricttag<Modifiers>
328	, strict_repeat_generator<Subject, iterator_type>
329	, repeat_generator<Subject, iterator_type>
330	>::type result_type;
331
332	template <typename Terminal>
333	result_type operator()(
334	Terminal const& term, Subject const& subject, unused_type) const
335	{
336	return result_type(subject,
337	iterator_type(
338	fusion::at_c<0>(term.args)
339	, fusion::at_c<1>(term.args)
340	)
341	);
342	}
343	};
344
345	template <typename T, typename Subject, typename Modifiers>
346	struct make_directive<
347	terminal_ex<tag::repeat
348	, fusion::vector2<T, inf_type> >, Subject, Modifiers>
349	{
350	typedef infinite_iterator<T> iterator_type;
351
352	typedef typename mpl::if_<
353	detail::get_stricttag<Modifiers>
354	, strict_repeat_generator<Subject, iterator_type>
355	, repeat_generator<Subject, iterator_type>
356	>::type result_type;
357
358	template <typename Terminal>
359	result_type operator()(
360	Terminal const& term, Subject const& subject, unused_type) const
361	{
362	return result_type(subject, fusion::at_c<0>(term.args));
363	}
364	};
365	}}}
366
367	namespace boost { namespace spirit { namespace traits
368	{
369	///////////////////////////////////////////////////////////////////////////
370	template <typename Subject, typename LoopIter>
371	struct has_semantic_action<karma::repeat_generator<Subject, LoopIter> >
372	: unary_has_semantic_action<Subject> {};
373
374	template <typename Subject, typename LoopIter>
375	struct has_semantic_action<karma::strict_repeat_generator<Subject, LoopIter> >
376	: unary_has_semantic_action<Subject> {};
377
378	///////////////////////////////////////////////////////////////////////////
379	template <typename Subject, typename LoopIter, typename Attribute
380	, typename Context, typename Iterator>
381	struct handles_container<
382	karma::repeat_generator<Subject, LoopIter>, Attribute
383	, Context, Iterator>
384	: mpl::true_ {};
385
386	template <typename Subject, typename LoopIter, typename Attribute
387	, typename Context, typename Iterator>
388	struct handles_container<
389	karma::strict_repeat_generator<Subject, LoopIter>, Attribute
390	, Context, Iterator>
391	: mpl::true_ {};
392	}}}
393
394	#endif