blob: 305367698377095c9d715ecf809c56f0b569c20f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*=============================================================================
Copyright (c) 2001-2014 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
#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 RContext>
bool parse(Iterator& first, Iterator const& last
, Context const& context, RContext& rcontext, unused_type) const
{
return this->subject.parse(first, last, context, rcontext, unused);
}
};
struct omit_gen
{
template <typename Subject>
omit_directive<typename extension::as_parser<Subject>::value_type>
operator[](Subject const& subject) const
{
return { as_parser(subject) };
}
};
auto const omit = omit_gen{};
}}}
#endif
|
