232 lines
8.7 KiB
C++
Executable File
232 lines
8.7 KiB
C++
Executable File
// 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_RIGHT_ALIGNMENT_FEB_27_2007_1216PM)
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#define BOOST_SPIRIT_KARMA_RIGHT_ALIGNMENT_FEB_27_2007_1216PM
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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/attribute_of.hpp>
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/karma/directive/detail/right_alignment_generate.hpp>
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#include <boost/lexical_cast.hpp>
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///////////////////////////////////////////////////////////////////////////////
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//
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// The BOOST_KARMA_DEFAULT_FIELD_LENGTH specifies the default field length
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// to be used for padding.
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//
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///////////////////////////////////////////////////////////////////////////////
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#if !defined(BOOST_KARMA_DEFAULT_FIELD_LENGTH)
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#define BOOST_KARMA_DEFAULT_FIELD_LENGTH 10
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#endif
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namespace boost { namespace spirit { namespace karma
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{
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///////////////////////////////////////////////////////////////////////////
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// The simple right alignment directive is used for right_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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struct simple_right_aligment
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{
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template <typename Component, typename Context, typename Unused>
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struct attribute
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: traits::attribute_of<
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karma::domain,
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typename result_of::argument1<Component>::type,
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Context
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>
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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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return detail::right_align_generate(sink, ctx, d, param,
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argument1(component), BOOST_KARMA_DEFAULT_FIELD_LENGTH,
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spirit::as_component(karma::domain(), ' '));
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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 = "right_align[";
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typedef typename
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spirit::result_of::argument1<Component>::type::director
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director;
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result += director::what(spirit::argument1(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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// The right alignment with width directive, is used for generators
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// like right_align(width)[...]. It uses a default value for the padding
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// generator (always spaces).
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///////////////////////////////////////////////////////////////////////////
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struct width_right_aligment
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{
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template <typename Component, typename Context, typename Unused>
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struct attribute
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: traits::attribute_of<
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karma::domain,
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typename result_of::subject<Component>::type,
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Context
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>
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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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return detail::right_align_generate(sink, ctx, d, param,
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subject(component), proto::arg_c<0>(argument1(component)), ' ');
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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 = "right_align(";
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result += boost::lexical_cast<std::string>(
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proto::arg_c<0>(argument1(component)));
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result += ")[";
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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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// The right alignment directive with padding, is used for generators like
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// right_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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struct padding_right_aligment
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{
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template <typename Component, typename Context, typename Unused>
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struct attribute
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: traits::attribute_of<
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karma::domain,
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typename result_of::subject<Component>::type,
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Context
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>
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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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return detail::right_align_generate(sink, ctx, d, param,
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subject(component), BOOST_KARMA_DEFAULT_FIELD_LENGTH,
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argument1(component));
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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 = "right_align(";
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typedef typename
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spirit::result_of::argument1<Component>::type::director
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padding;
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result += padding::what(spirit::argument1(component), ctx);
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result += ")[";
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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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// The full right alignment directive, is used for generators like
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// right_align(width, padding)[...], where width is a integer value to be
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// used as the field width and padding is a arbitrary generator
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// expression.
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///////////////////////////////////////////////////////////////////////////
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struct full_right_aligment
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{
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template <typename Component, typename Context, typename Unused>
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struct attribute
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: traits::attribute_of<
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karma::domain,
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typename result_of::subject<Component>::type,
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Context
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>
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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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return detail::right_align_generate(sink, ctx, d, param,
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subject(component), proto::arg_c<0>(argument1(component)),
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argument2(component));
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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 = "right_align(";
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result += boost::lexical_cast<std::string>(
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proto::arg_c<0>(argument1(component)));
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result += ", ";
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typedef typename
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spirit::result_of::argument2<Component>::type::director
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padding;
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result += padding::what(spirit::argument2(component), ctx);
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result += ")[";
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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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}}} // namespace boost::spirit::karma
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#endif
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