99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
// 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)
|
|
|
|
#ifndef BOOST_SPIRIT_KARMA_OPERATOR_NOT_PREDICATE_HPP
|
|
#define BOOST_SPIRIT_KARMA_OPERATOR_NOT_PREDICATE_HPP
|
|
|
|
#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>
|
|
#include <boost/proto/operators.hpp>
|
|
#include <boost/proto/tags.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
|