[ceph.git] / ceph / src / boost / libs / spirit / include / boost / spirit / home / karma / directive / left_alignment.hpp

//  Copyright (c) 2001-2011 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_LEFT_ALIGNMENT_FEB_27_2007_1216PM)
#define BOOST_SPIRIT_KARMA_LEFT_ALIGNMENT_FEB_27_2007_1216PM

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/spirit/home/karma/meta_compiler.hpp>
#include <boost/spirit/home/karma/generator.hpp>
#include <boost/spirit/home/karma/domain.hpp>
#include <boost/spirit/home/karma/detail/output_iterator.hpp>
#include <boost/spirit/home/karma/detail/default_width.hpp>
#include <boost/spirit/home/karma/delimit_out.hpp>
#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
#include <boost/spirit/home/support/unused.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/karma/detail/attributes.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/support/unused.hpp>
#include <boost/spirit/home/support/has_semantic_action.hpp>
#include <boost/spirit/home/support/handles_container.hpp>
#include <boost/fusion/include/at.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/integer_traits.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/detail/workaround.hpp>

///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit
{
    ///////////////////////////////////////////////////////////////////////////
    // Enablers
    ///////////////////////////////////////////////////////////////////////////

    // enables left_align[]
    template <>
    struct use_directive<karma::domain, tag::left_align>
      : mpl::true_ {};

    // enables left_align(d)[g] and left_align(w)[g], where d is a generator
    // and w is a maximum width
    template <typename T>
    struct use_directive<karma::domain
          , terminal_ex<tag::left_align, fusion::vector1<T> > >
      : mpl::true_ {};

    // enables *lazy* left_align(d)[g], where d provides a generator
    template <>
    struct use_lazy_directive<karma::domain, tag::left_align, 1> 
      : mpl::true_ {};

    // enables left_align(w, d)[g], where d is a generator and w is a maximum 
    // width
    template <typename Width, typename Padding>
    struct use_directive<karma::domain
          , terminal_ex<tag::left_align, fusion::vector2<Width, Padding> > >
      : spirit::traits::matches<karma::domain, Padding> {};

    // enables *lazy* left_align(w, d)[g], where d provides a generator and w 
    // is a maximum width
    template <>
    struct use_lazy_directive<karma::domain, tag::left_align, 2> 
      : mpl::true_ {};

}}

///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit { namespace karma
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
    using spirit::left_align;
#endif
    using spirit::left_align_type;

    namespace detail
    {
        ///////////////////////////////////////////////////////////////////////
        //  The left_align_generate template function is used for all the 
        //  different flavors of the left_align[] directive. 
        ///////////////////////////////////////////////////////////////////////
        template <typename OutputIterator, typename Context, typename Delimiter, 
            typename Attribute, typename Embedded, typename Padding>
        inline static bool 
        left_align_generate(OutputIterator& sink, Context& ctx, 
            Delimiter const& d, Attribute const& attr, Embedded const& e, 
            unsigned int const width, Padding const& p) 
        {
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
            e; // suppresses warning: C4100: 'e' : unreferenced formal parameter
#endif
            // wrap the given output iterator to allow counting
            detail::enable_counting<OutputIterator> counting(sink);

            // first generate the underlying output 
            bool r = e.generate(sink, ctx, d, attr);

            // pad the output until the max width is reached
            while(r && counting.count() < width) 
                r = p.generate(sink, ctx, unused, unused);

            return r;
        }
    }

    ///////////////////////////////////////////////////////////////////////////
    //  The simple left alignment directive is used for left_align[...]
    //  generators. It uses default values for the generated width (defined via
    //  the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant) and for the padding
    //  generator (always spaces).
    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename Width = detail::default_width>
    struct simple_left_alignment 
      : unary_generator<simple_left_alignment<Subject, Width> >
    {
        typedef Subject subject_type;

        typedef mpl::int_<
            generator_properties::counting | subject_type::properties::value
        > properties;

        template <typename Context, typename Iterator>
        struct attribute
          : traits::attribute_of<subject_type, Context, Iterator>
        {};

        simple_left_alignment(Subject const& subject, Width width = Width())
          : subject(subject), width(width) {}

        template <typename OutputIterator, typename Context, typename Delimiter
          , typename Attribute>
        bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
          , Attribute const& attr) const
        {
            return detail::left_align_generate(sink, ctx, d, attr,
                subject, width, compile<karma::domain>(' '));
        }

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

        Subject subject;
        Width width;
    };

    ///////////////////////////////////////////////////////////////////////////
    //  The left alignment directive with padding, is used for generators like
    //  left_align(padding)[...], where padding is a arbitrary generator
    //  expression. It uses a default value for the generated width (defined
    //  via the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant).
    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename Padding
      , typename Width = detail::default_width>
    struct padding_left_alignment 
      : unary_generator<padding_left_alignment<Subject, Padding, Width> >
    {
        typedef Subject subject_type;
        typedef Padding padding_type;

        typedef mpl::int_<
            generator_properties::counting | 
            subject_type::properties::value | padding_type::properties::value 
        > properties;

        template <typename Context, typename Iterator>
        struct attribute
          : traits::attribute_of<subject_type, Context, Iterator>
        {};

        padding_left_alignment(Subject const& subject, Padding const& padding
              , Width width = Width())
          : subject(subject), padding(padding), width(width) {}

        template <typename OutputIterator, typename Context, typename Delimiter
          , typename Attribute>
        bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
          , Attribute const& attr) const
        {
            return detail::left_align_generate(sink, ctx, d, attr,
                subject, width, padding);
        }

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

        Subject subject;
        Padding padding;
        Width width;
    };

    ///////////////////////////////////////////////////////////////////////////
    // Generator generators: make_xxx function (objects)
    ///////////////////////////////////////////////////////////////////////////

    // creates left_align[] directive generator
    template <typename Subject, typename Modifiers>
    struct make_directive<tag::left_align, Subject, Modifiers>
    {
        typedef simple_left_alignment<Subject> result_type;
        result_type operator()(unused_type, Subject const& subject
          , unused_type) const
        {
            return result_type(subject);
        }
    };

    // creates left_align(width)[] directive generator
    template <typename Width, typename Subject, typename Modifiers>
    struct make_directive<
        terminal_ex<tag::left_align, fusion::vector1<Width> >
      , Subject, Modifiers
      , typename enable_if_c< integer_traits<Width>::is_integral >::type>
    {
        typedef simple_left_alignment<Subject, Width> 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));
        }
    };

    // creates left_align(pad)[] directive generator
    template <typename Padding, typename Subject, typename Modifiers>
    struct make_directive<
        terminal_ex<tag::left_align, fusion::vector1<Padding> >
      , Subject, Modifiers
      , typename enable_if<
            mpl::and_<
                spirit::traits::matches<karma::domain, Padding>,
                mpl::not_<mpl::bool_<integer_traits<Padding>::is_integral> >
            >
        >::type>
    {
        typedef typename
            result_of::compile<karma::domain, Padding, Modifiers>::type
        padding_type;

        typedef padding_left_alignment<Subject, padding_type> result_type;

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

    // creates left_align(width, pad)[] directive generator
    template <typename Width, typename Padding, typename Subject
      , typename Modifiers>
    struct make_directive<
        terminal_ex<tag::left_align, fusion::vector2<Width, Padding> >
      , Subject, Modifiers>
    {
        typedef typename
            result_of::compile<karma::domain, Padding, Modifiers>::type
        padding_type;

        typedef padding_left_alignment<Subject, padding_type, Width> result_type;

        template <typename Terminal>
        result_type operator()(Terminal const& term, Subject const& subject
          , Modifiers const& modifiers) const
        {
            return result_type(subject
              , compile<karma::domain>(fusion::at_c<1>(term.args), modifiers)
              , fusion::at_c<0>(term.args));
        }
    };

}}} // namespace boost::spirit::karma

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

    template <typename Subject, typename Padding, typename Width>
    struct has_semantic_action<
            karma::padding_left_alignment<Subject, Padding, Width> >
      : unary_has_semantic_action<Subject> {};

    ///////////////////////////////////////////////////////////////////////////
    template <typename Subject, typename Width, typename Attribute
      , typename Context, typename Iterator>
    struct handles_container<
            karma::simple_left_alignment<Subject, Width>, Attribute
          , Context, Iterator>
      : unary_handles_container<Subject, Attribute, Context, Iterator> {};

    template <typename Subject, typename Padding, typename Width
      , typename Attribute, typename Context, typename Iterator>
    struct handles_container<
            karma::padding_left_alignment<Subject, Padding, Width>
          , Attribute, Context, Iterator>
      : unary_handles_container<Subject, Attribute, Context, Iterator> {};
}}}

#endif
Commit	Line	Data
7c673cae FG	1	// Copyright (c) 2001-2011 Hartmut Kaiser
	2	//
	3	// Distributed under the Boost Software License, Version 1.0. (See accompanying
	4	// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
	5
	6	#if !defined(BOOST_SPIRIT_KARMA_LEFT_ALIGNMENT_FEB_27_2007_1216PM)
	7	#define BOOST_SPIRIT_KARMA_LEFT_ALIGNMENT_FEB_27_2007_1216PM
	8
	9	#if defined(_MSC_VER)
	10	#pragma once
	11	#endif
	12
	13	#include <boost/spirit/home/karma/meta_compiler.hpp>
	14	#include <boost/spirit/home/karma/generator.hpp>
	15	#include <boost/spirit/home/karma/domain.hpp>
	16	#include <boost/spirit/home/karma/detail/output_iterator.hpp>
	17	#include <boost/spirit/home/karma/detail/default_width.hpp>
	18	#include <boost/spirit/home/karma/delimit_out.hpp>
	19	#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
	20	#include <boost/spirit/home/support/unused.hpp>
	21	#include <boost/spirit/home/support/common_terminals.hpp>
	22	#include <boost/spirit/home/karma/detail/attributes.hpp>
	23	#include <boost/spirit/home/support/info.hpp>
	24	#include <boost/spirit/home/support/unused.hpp>
	25	#include <boost/spirit/home/support/has_semantic_action.hpp>
	26	#include <boost/spirit/home/support/handles_container.hpp>
	27	#include <boost/fusion/include/at.hpp>
	28	#include <boost/fusion/include/vector.hpp>
	29	#include <boost/lexical_cast.hpp>
	30	#include <boost/integer_traits.hpp>
	31	#include <boost/mpl/bool.hpp>
	32	#include <boost/utility/enable_if.hpp>
	33	#include <boost/detail/workaround.hpp>
	34
	35	///////////////////////////////////////////////////////////////////////////////
	36	namespace boost { namespace spirit
	37	{
	38	///////////////////////////////////////////////////////////////////////////
	39	// Enablers
	40	///////////////////////////////////////////////////////////////////////////
	41
	42	// enables left_align[]
	43	template <>
	44	struct use_directive<karma::domain, tag::left_align>
	45	: mpl::true_ {};
	46
	47	// enables left_align(d)[g] and left_align(w)[g], where d is a generator
	48	// and w is a maximum width
	49	template <typename T>
	50	struct use_directive<karma::domain
	51	, terminal_ex<tag::left_align, fusion::vector1<T> > >
	52	: mpl::true_ {};
	53
	54	// enables lazy left_align(d)[g], where d provides a generator
	55	template <>
	56	struct use_lazy_directive<karma::domain, tag::left_align, 1>
	57	: mpl::true_ {};
	58
	59	// enables left_align(w, d)[g], where d is a generator and w is a maximum
	60	// width
	61	template <typename Width, typename Padding>
	62	struct use_directive<karma::domain
	63	, terminal_ex<tag::left_align, fusion::vector2<Width, Padding> > >
	64	: spirit::traits::matches<karma::domain, Padding> {};
65
66	// enables lazy left_align(w, d)[g], where d provides a generator and w
67	// is a maximum width
68	template <>
69	struct use_lazy_directive<karma::domain, tag::left_align, 2>
70	: mpl::true_ {};
71
72	}}
73
74	///////////////////////////////////////////////////////////////////////////////
75	namespace boost { namespace spirit { namespace karma
76	{
77	#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
78	using spirit::left_align;
79	#endif
80	using spirit::left_align_type;
81
82	namespace detail
83	{
84	///////////////////////////////////////////////////////////////////////
85	// The left_align_generate template function is used for all the
86	// different flavors of the left_align[] directive.
87	///////////////////////////////////////////////////////////////////////
88	template <typename OutputIterator, typename Context, typename Delimiter,
89	typename Attribute, typename Embedded, typename Padding>
90	inline static bool
91	left_align_generate(OutputIterator& sink, Context& ctx,
92	Delimiter const& d, Attribute const& attr, Embedded const& e,
93	unsigned int const width, Padding const& p)
94	{
95	#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
96	e; // suppresses warning: C4100: 'e' : unreferenced formal parameter
97	#endif
98	// wrap the given output iterator to allow counting
99	detail::enable_counting<OutputIterator> counting(sink);
100
101	// first generate the underlying output
102	bool r = e.generate(sink, ctx, d, attr);
103
104	// pad the output until the max width is reached
105	while(r && counting.count() < width)
106	r = p.generate(sink, ctx, unused, unused);
107
108	return r;
109	}
110	}
111
112	///////////////////////////////////////////////////////////////////////////
113	// The simple left alignment directive is used for left_align[...]
114	// generators. It uses default values for the generated width (defined via
115	// the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant) and for the padding
116	// generator (always spaces).
117	///////////////////////////////////////////////////////////////////////////
118	template <typename Subject, typename Width = detail::default_width>
119	struct simple_left_alignment
120	: unary_generator<simple_left_alignment<Subject, Width> >
121	{
122	typedef Subject subject_type;
123
124	typedef mpl::int_<
125	generator_properties::counting \| subject_type::properties::value
126	> properties;
127
128	template <typename Context, typename Iterator>
129	struct attribute
130	: traits::attribute_of<subject_type, Context, Iterator>
131	{};
132
133	simple_left_alignment(Subject const& subject, Width width = Width())
134	: subject(subject), width(width) {}
135
136	template <typename OutputIterator, typename Context, typename Delimiter
137	, typename Attribute>
138	bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
139	, Attribute const& attr) const
140	{
141	return detail::left_align_generate(sink, ctx, d, attr,
142	subject, width, compile<karma::domain>(' '));
143	}
144
145	template <typename Context>
146	info what(Context& context) const
147	{
148	return info("left_align", subject.what(context));
149	}
150
151	Subject subject;
152	Width width;
153	};
154
155	///////////////////////////////////////////////////////////////////////////
156	// The left alignment directive with padding, is used for generators like
157	// left_align(padding)[...], where padding is a arbitrary generator
158	// expression. It uses a default value for the generated width (defined
159	// via the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant).
160	///////////////////////////////////////////////////////////////////////////
161	template <typename Subject, typename Padding
162	, typename Width = detail::default_width>
163	struct padding_left_alignment
164	: unary_generator<padding_left_alignment<Subject, Padding, Width> >
165	{
166	typedef Subject subject_type;
167	typedef Padding padding_type;
168
169	typedef mpl::int_<
170	generator_properties::counting \|
171	subject_type::properties::value \| padding_type::properties::value
172	> properties;
173
174	template <typename Context, typename Iterator>
175	struct attribute
176	: traits::attribute_of<subject_type, Context, Iterator>
177	{};
178
179	padding_left_alignment(Subject const& subject, Padding const& padding
180	, Width width = Width())
181	: subject(subject), padding(padding), width(width) {}
182
183	template <typename OutputIterator, typename Context, typename Delimiter
184	, typename Attribute>
185	bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
186	, Attribute const& attr) const
187	{
188	return detail::left_align_generate(sink, ctx, d, attr,
189	subject, width, padding);
190	}
191
192	template <typename Context>
193	info what(Context& context) const
194	{
195	return info("left_align", subject.what(context));
196	}
197
198	Subject subject;
199	Padding padding;
200	Width width;
201	};
202
203	///////////////////////////////////////////////////////////////////////////
204	// Generator generators: make_xxx function (objects)
205	///////////////////////////////////////////////////////////////////////////
206
207	// creates left_align[] directive generator
208	template <typename Subject, typename Modifiers>
209	struct make_directive<tag::left_align, Subject, Modifiers>
210	{
211	typedef simple_left_alignment<Subject> result_type;
212	result_type operator()(unused_type, Subject const& subject
213	, unused_type) const
214	{
215	return result_type(subject);
216	}
217	};
218
219	// creates left_align(width)[] directive generator
220	template <typename Width, typename Subject, typename Modifiers>
221	struct make_directive<
222	terminal_ex<tag::left_align, fusion::vector1<Width> >
223	, Subject, Modifiers
224	, typename enable_if_c< integer_traits<Width>::is_integral >::type>
225	{
226	typedef simple_left_alignment<Subject, Width> result_type;
227
228	template <typename Terminal>
229	result_type operator()(Terminal const& term, Subject const& subject
230	, unused_type) const
231	{
232	return result_type(subject, fusion::at_c<0>(term.args));
233	}
234	};
235
236	// creates left_align(pad)[] directive generator
237	template <typename Padding, typename Subject, typename Modifiers>
238	struct make_directive<
239	terminal_ex<tag::left_align, fusion::vector1<Padding> >
240	, Subject, Modifiers
241	, typename enable_if<
242	mpl::and_<
243	spirit::traits::matches<karma::domain, Padding>,
244	mpl::not_<mpl::bool_<integer_traits<Padding>::is_integral> >
245	>
246	>::type>
247	{
248	typedef typename
249	result_of::compile<karma::domain, Padding, Modifiers>::type
250	padding_type;
251
252	typedef padding_left_alignment<Subject, padding_type> result_type;
253
254	template <typename Terminal>
255	result_type operator()(Terminal const& term, Subject const& subject
256	, Modifiers const& modifiers) const
257	{
258	return result_type(subject
259	, compile<karma::domain>(fusion::at_c<0>(term.args), modifiers));
260	}
261	};
262
263	// creates left_align(width, pad)[] directive generator
264	template <typename Width, typename Padding, typename Subject
265	, typename Modifiers>
266	struct make_directive<
267	terminal_ex<tag::left_align, fusion::vector2<Width, Padding> >
268	, Subject, Modifiers>
269	{
270	typedef typename
271	result_of::compile<karma::domain, Padding, Modifiers>::type
272	padding_type;
273
274	typedef padding_left_alignment<Subject, padding_type, Width> result_type;
275
276	template <typename Terminal>
277	result_type operator()(Terminal const& term, Subject const& subject
278	, Modifiers const& modifiers) const
279	{
280	return result_type(subject
281	, compile<karma::domain>(fusion::at_c<1>(term.args), modifiers)
282	, fusion::at_c<0>(term.args));
283	}
284	};
285
286	}}} // namespace boost::spirit::karma
287
288	namespace boost { namespace spirit { namespace traits
289	{
290	///////////////////////////////////////////////////////////////////////////
291	template <typename Subject, typename Width>
292	struct has_semantic_action<karma::simple_left_alignment<Subject, Width> >
293	: unary_has_semantic_action<Subject> {};
294
295	template <typename Subject, typename Padding, typename Width>
296	struct has_semantic_action<
297	karma::padding_left_alignment<Subject, Padding, Width> >
298	: unary_has_semantic_action<Subject> {};
299
300	///////////////////////////////////////////////////////////////////////////
301	template <typename Subject, typename Width, typename Attribute
302	, typename Context, typename Iterator>
303	struct handles_container<
304	karma::simple_left_alignment<Subject, Width>, Attribute
305	, Context, Iterator>
306	: unary_handles_container<Subject, Attribute, Context, Iterator> {};
307
308	template <typename Subject, typename Padding, typename Width
309	, typename Attribute, typename Context, typename Iterator>
310	struct handles_container<
311	karma::padding_left_alignment<Subject, Padding, Width>
312	, Attribute, Context, Iterator>
313	: unary_handles_container<Subject, Attribute, Context, Iterator> {};
314	}}}
315
316	#endif
317
318