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Added thirdparty: boost library
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Viacheslav Demydiuk
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// Copyright (c) 2001-2011 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_LEFT_ALIGNMENT_FEB_27_2007_1216PM)
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#define BOOST_SPIRIT_KARMA_LEFT_ALIGNMENT_FEB_27_2007_1216PM
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/spirit/home/karma/meta_compiler.hpp>
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#include <boost/spirit/home/karma/generator.hpp>
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/karma/detail/output_iterator.hpp>
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#include <boost/spirit/home/karma/detail/default_width.hpp>
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#include <boost/spirit/home/karma/delimit_out.hpp>
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#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
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#include <boost/spirit/home/karma/char/char.hpp>
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#include <boost/spirit/home/support/unused.hpp>
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#include <boost/spirit/home/support/common_terminals.hpp>
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#include <boost/spirit/home/karma/detail/attributes.hpp>
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#include <boost/spirit/home/support/info.hpp>
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#include <boost/spirit/home/support/unused.hpp>
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#include <boost/spirit/home/support/has_semantic_action.hpp>
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#include <boost/spirit/home/support/handles_container.hpp>
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#include <boost/fusion/include/at.hpp>
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#include <boost/fusion/include/vector.hpp>
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#include <boost/integer_traits.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/detail/workaround.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit
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{
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///////////////////////////////////////////////////////////////////////////
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// Enablers
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///////////////////////////////////////////////////////////////////////////
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// enables left_align[]
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template <>
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struct use_directive<karma::domain, tag::left_align>
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: mpl::true_ {};
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// enables left_align(d)[g] and left_align(w)[g], where d is a generator
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// and w is a maximum width
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template <typename T>
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struct use_directive<karma::domain
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, terminal_ex<tag::left_align, fusion::vector1<T> > >
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: mpl::true_ {};
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// enables *lazy* left_align(d)[g], where d provides a generator
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template <>
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struct use_lazy_directive<karma::domain, tag::left_align, 1>
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: mpl::true_ {};
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// enables left_align(w, d)[g], where d is a generator and w is a maximum
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// width
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template <typename Width, typename Padding>
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struct use_directive<karma::domain
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, terminal_ex<tag::left_align, fusion::vector2<Width, Padding> > >
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: spirit::traits::matches<karma::domain, Padding> {};
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// enables *lazy* left_align(w, d)[g], where d provides a generator and w
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// is a maximum width
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template <>
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struct use_lazy_directive<karma::domain, tag::left_align, 2>
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: mpl::true_ {};
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}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace karma
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{
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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using spirit::left_align;
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#endif
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using spirit::left_align_type;
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namespace detail
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{
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///////////////////////////////////////////////////////////////////////
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// The left_align_generate template function is used for all the
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// different flavors of the left_align[] directive.
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///////////////////////////////////////////////////////////////////////
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template <typename OutputIterator, typename Context, typename Delimiter,
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typename Attribute, typename Embedded, typename Padding>
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inline static bool
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left_align_generate(OutputIterator& sink, Context& ctx,
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Delimiter const& d, Attribute const& attr, Embedded const& e,
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unsigned int const width, Padding const& p)
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
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(void)e; // suppresses warning: C4100: 'e' : unreferenced formal parameter
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#endif
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// wrap the given output iterator to allow counting
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detail::enable_counting<OutputIterator> counting(sink);
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// first generate the underlying output
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bool r = e.generate(sink, ctx, d, attr);
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// pad the output until the max width is reached
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while(r && counting.count() < width)
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r = p.generate(sink, ctx, unused, unused);
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return r;
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// The simple left alignment directive is used for left_align[...]
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// generators. It uses default values for the generated width (defined via
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// the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant) and for the padding
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// generator (always spaces).
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject, typename Width = detail::default_width>
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struct simple_left_alignment
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: unary_generator<simple_left_alignment<Subject, Width> >
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{
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typedef Subject subject_type;
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typedef mpl::int_<
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generator_properties::counting | subject_type::properties::value
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> properties;
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template <typename Context, typename Iterator>
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struct attribute
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: traits::attribute_of<subject_type, Context, Iterator>
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{};
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simple_left_alignment(Subject const& subject, Width width = Width())
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: subject(subject), width(width) {}
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template <typename OutputIterator, typename Context, typename Delimiter
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, typename Attribute>
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bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
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, Attribute const& attr) const
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{
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return detail::left_align_generate(sink, ctx, d, attr,
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subject, width, compile<karma::domain>(' '));
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}
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template <typename Context>
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info what(Context& context) const
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{
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return info("left_align", subject.what(context));
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}
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Subject subject;
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Width width;
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};
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///////////////////////////////////////////////////////////////////////////
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// The left alignment directive with padding, is used for generators like
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// left_align(padding)[...], where padding is a arbitrary generator
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// expression. It uses a default value for the generated width (defined
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// via the BOOST_KARMA_DEFAULT_FIELD_LENGTH constant).
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject, typename Padding
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, typename Width = detail::default_width>
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struct padding_left_alignment
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: unary_generator<padding_left_alignment<Subject, Padding, Width> >
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{
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typedef Subject subject_type;
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typedef Padding padding_type;
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typedef mpl::int_<
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generator_properties::counting |
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subject_type::properties::value | padding_type::properties::value
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> properties;
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template <typename Context, typename Iterator>
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struct attribute
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: traits::attribute_of<subject_type, Context, Iterator>
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{};
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padding_left_alignment(Subject const& subject, Padding const& padding
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, Width width = Width())
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: subject(subject), padding(padding), width(width) {}
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template <typename OutputIterator, typename Context, typename Delimiter
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, typename Attribute>
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bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
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, Attribute const& attr) const
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{
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return detail::left_align_generate(sink, ctx, d, attr,
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subject, width, padding);
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}
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template <typename Context>
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info what(Context& context) const
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{
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return info("left_align", subject.what(context));
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}
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Subject subject;
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Padding padding;
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Width width;
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};
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///////////////////////////////////////////////////////////////////////////
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// Generator generators: make_xxx function (objects)
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///////////////////////////////////////////////////////////////////////////
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// creates left_align[] directive generator
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template <typename Subject, typename Modifiers>
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struct make_directive<tag::left_align, Subject, Modifiers>
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{
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typedef simple_left_alignment<Subject> result_type;
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result_type operator()(unused_type, Subject const& subject
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, unused_type) const
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{
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return result_type(subject);
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}
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};
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// creates left_align(width)[] directive generator
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template <typename Width, typename Subject, typename Modifiers>
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struct make_directive<
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terminal_ex<tag::left_align, fusion::vector1<Width> >
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, Subject, Modifiers
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, typename enable_if_c< integer_traits<Width>::is_integral >::type>
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{
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typedef simple_left_alignment<Subject, Width> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, Subject const& subject
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, unused_type) const
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{
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return result_type(subject, fusion::at_c<0>(term.args));
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}
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};
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// creates left_align(pad)[] directive generator
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template <typename Padding, typename Subject, typename Modifiers>
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struct make_directive<
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terminal_ex<tag::left_align, fusion::vector1<Padding> >
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, Subject, Modifiers
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, typename enable_if<
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mpl::and_<
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spirit::traits::matches<karma::domain, Padding>,
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mpl::not_<mpl::bool_<integer_traits<Padding>::is_integral> >
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>
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>::type>
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{
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typedef typename
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result_of::compile<karma::domain, Padding, Modifiers>::type
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padding_type;
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typedef padding_left_alignment<Subject, padding_type> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, Subject const& subject
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, Modifiers const& modifiers) const
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{
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return result_type(subject
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, compile<karma::domain>(fusion::at_c<0>(term.args), modifiers));
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}
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};
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// creates left_align(width, pad)[] directive generator
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template <typename Width, typename Padding, typename Subject
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, typename Modifiers>
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struct make_directive<
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terminal_ex<tag::left_align, fusion::vector2<Width, Padding> >
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, Subject, Modifiers>
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{
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typedef typename
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result_of::compile<karma::domain, Padding, Modifiers>::type
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padding_type;
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typedef padding_left_alignment<Subject, padding_type, Width> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, Subject const& subject
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, Modifiers const& modifiers) const
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{
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return result_type(subject
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, compile<karma::domain>(fusion::at_c<1>(term.args), modifiers)
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, fusion::at_c<0>(term.args));
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}
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};
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}}} // namespace boost::spirit::karma
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namespace boost { namespace spirit { namespace traits
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{
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject, typename Width>
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struct has_semantic_action<karma::simple_left_alignment<Subject, Width> >
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: unary_has_semantic_action<Subject> {};
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template <typename Subject, typename Padding, typename Width>
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struct has_semantic_action<
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karma::padding_left_alignment<Subject, Padding, Width> >
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: unary_has_semantic_action<Subject> {};
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject, typename Width, typename Attribute
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, typename Context, typename Iterator>
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struct handles_container<
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karma::simple_left_alignment<Subject, Width>, Attribute
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, Context, Iterator>
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: unary_handles_container<Subject, Attribute, Context, Iterator> {};
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template <typename Subject, typename Padding, typename Width
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, typename Attribute, typename Context, typename Iterator>
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struct handles_container<
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karma::padding_left_alignment<Subject, Padding, Width>
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, Attribute, Context, Iterator>
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: unary_handles_container<Subject, Attribute, Context, Iterator> {};
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}}}
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#endif
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