mirror of
https://github.com/boostorg/spirit.git
synced 2026-01-19 04:42:11 +00:00
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2001-2013 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_OMIT_MARCH_24_2007_0802AM)
|
|
#define SPIRIT_OMIT_MARCH_24_2007_0802AM
|
|
|
|
#if defined(_MSC_VER)
|
|
#pragma once
|
|
#endif
|
|
|
|
#include <boost/spirit/home/x3/support/unused.hpp>
|
|
#include <boost/spirit/home/x3/core/parser.hpp>
|
|
|
|
namespace boost { namespace spirit { namespace x3
|
|
{
|
|
///////////////////////////////////////////////////////////////////////////
|
|
// omit_directive forces the attribute of subject parser
|
|
// to be unused_type
|
|
///////////////////////////////////////////////////////////////////////////
|
|
template <typename Subject>
|
|
struct omit_directive : unary_parser<Subject, omit_directive<Subject>>
|
|
{
|
|
typedef unary_parser<Subject, omit_directive<Subject> > base_type;
|
|
typedef unused_type attribute_type;
|
|
static bool const has_attribute = false;
|
|
|
|
typedef Subject subject_type;
|
|
omit_directive(Subject const& subject)
|
|
: base_type(subject) {}
|
|
|
|
template <typename Iterator, typename Context, typename Attribute>
|
|
bool parse(Iterator& first, Iterator const& last
|
|
, Context const& context, Attribute& attr) const
|
|
{
|
|
return this->subject.parse(first, last, context, attr);
|
|
}
|
|
};
|
|
|
|
struct omit_gen
|
|
{
|
|
template <typename Subject>
|
|
omit_directive<typename extension::as_parser<Subject>::value_type>
|
|
operator[](Subject const& subject) const
|
|
{
|
|
return {as_parser(subject)};
|
|
}
|
|
};
|
|
|
|
omit_gen const omit = omit_gen();
|
|
}}}
|
|
|
|
#endif
|