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- // 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_NOT_PREDICATE_MAR_21_2009_1132AM)
- #define SPIRIT_KARMA_NOT_PREDICATE_MAR_21_2009_1132AM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/karma/domain.hpp>
- #include <boost/spirit/home/karma/meta_compiler.hpp>
- #include <boost/spirit/home/karma/generator.hpp>
- #include <boost/spirit/home/karma/detail/output_iterator.hpp>
- #include <boost/spirit/home/karma/detail/attributes.hpp>
- #include <boost/spirit/home/support/info.hpp>
- #include <boost/spirit/home/support/has_semantic_action.hpp>
- #include <boost/spirit/home/support/handles_container.hpp>
- namespace boost { namespace spirit
- {
- ///////////////////////////////////////////////////////////////////////////
- // Enablers
- ///////////////////////////////////////////////////////////////////////////
- template <>
- struct use_operator<karma::domain, proto::tag::logical_not> // enables !g
- : mpl::true_ {};
- }}
- namespace boost { namespace spirit { namespace karma
- {
- template <typename Subject>
- struct not_predicate : unary_generator<not_predicate<Subject> >
- {
- typedef Subject subject_type;
- typedef mpl::int_<
- generator_properties::disabling | subject_type::properties::value
- > properties;
- template <typename Context, typename Iterator>
- struct attribute
- : traits::attribute_of<subject_type, Context, Iterator>
- {};
- not_predicate(Subject const& subject)
- : subject(subject) {}
- template <
- typename OutputIterator, typename Context, typename Delimiter
- , typename Attribute>
- bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
- , Attribute const& attr) const
- {
- // inhibits output
- detail::disable_output<OutputIterator> disable(sink);
- return !subject.generate(sink, ctx, d, attr);
- }
- template <typename Context>
- info what(Context& context) const
- {
- return info("not-predicate", subject.what(context));
- }
- Subject subject;
- };
- ///////////////////////////////////////////////////////////////////////////
- // Generator generators: make_xxx function (objects)
- ///////////////////////////////////////////////////////////////////////////
- template <typename Elements, typename Modifiers>
- struct make_composite<proto::tag::logical_not, Elements, Modifiers>
- : make_unary_composite<Elements, not_predicate> {};
- }}}
- namespace boost { namespace spirit { namespace traits
- {
- ///////////////////////////////////////////////////////////////////////////
- template <typename Subject>
- struct has_semantic_action<karma::not_predicate<Subject> >
- : unary_has_semantic_action<Subject> {};
- ///////////////////////////////////////////////////////////////////////////
- template <typename Subject, typename Attribute, typename Context
- , typename Iterator>
- struct handles_container<karma::not_predicate<Subject>, Attribute
- , Context, Iterator>
- : unary_handles_container<Subject, Attribute, Context, Iterator> {};
- }}}
- #endif
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