1 /*=============================================================================
2 Copyright (c) 2001-2014 Joel de Guzman
3 Copyright (c) 2001-2011 Hartmut Kaiser
4 Copyright (c) 2013 Agustin Berge
6 Distributed under the Boost Software License, Version 1.0. (See accompanying
7 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8 =============================================================================*/
9 #if !defined(SPIRIT_NO_SKIP_JAN_16_2010_0802PM)
10 #define SPIRIT_NO_SKIP_JAN_16_2010_0802PM
12 #include <boost/spirit/home/x3/support/context.hpp>
13 #include <boost/spirit/home/x3/support/unused.hpp>
14 #include <boost/spirit/home/x3/core/skip_over.hpp>
15 #include <boost/spirit/home/x3/core/parser.hpp>
16 #include <boost/type_traits/remove_reference.hpp>
17 #include <boost/utility/enable_if.hpp>
19 namespace boost { namespace spirit { namespace x3
21 // same as lexeme[], but does not pre-skip
22 template <typename Subject>
23 struct no_skip_directive : unary_parser<Subject, no_skip_directive<Subject>>
25 typedef unary_parser<Subject, no_skip_directive<Subject> > base_type;
26 static bool const is_pass_through_unary = true;
27 static bool const handles_container = Subject::handles_container;
29 no_skip_directive(Subject const& subject)
30 : base_type(subject) {}
32 template <typename Iterator, typename Context
33 , typename RContext, typename Attribute>
34 typename enable_if<has_skipper<Context>, bool>::type
35 parse(Iterator& first, Iterator const& last
36 , Context const& context, RContext& rcontext, Attribute& attr) const
38 auto const& skipper = x3::get<skipper_tag>(context);
40 typedef unused_skipper<
41 typename remove_reference<decltype(skipper)>::type>
43 unused_skipper_type unused_skipper(skipper);
45 return this->subject.parse(
47 , make_context<skipper_tag>(unused_skipper, context)
51 template <typename Iterator, typename Context
52 , typename RContext, typename Attribute>
53 typename disable_if<has_skipper<Context>, bool>::type
54 parse(Iterator& first, Iterator const& last
55 , Context const& context, RContext& rcontext, Attribute& attr) const
57 return this->subject.parse(
67 template <typename Subject>
68 no_skip_directive<typename extension::as_parser<Subject>::value_type>
69 operator[](Subject const& subject) const
71 return { as_parser(subject) };
75 auto const no_skip = no_skip_gen{};