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Diffstat (limited to 'boost/spirit/home/x3/directive/no_skip.hpp')
-rw-r--r-- | boost/spirit/home/x3/directive/no_skip.hpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/boost/spirit/home/x3/directive/no_skip.hpp b/boost/spirit/home/x3/directive/no_skip.hpp new file mode 100644 index 0000000000..14dee4d85c --- /dev/null +++ b/boost/spirit/home/x3/directive/no_skip.hpp @@ -0,0 +1,82 @@ +/*============================================================================= + Copyright (c) 2001-2014 Joel de Guzman + Copyright (c) 2001-2011 Hartmut Kaiser + Copyright (c) 2013 Agustin Berge + + 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_NO_SKIP_JAN_16_2010_0802PM) +#define SPIRIT_NO_SKIP_JAN_16_2010_0802PM + +#if defined(_MSC_VER) +#pragma once +#endif + +#include <boost/spirit/home/x3/support/context.hpp> +#include <boost/spirit/home/x3/support/unused.hpp> +#include <boost/spirit/home/x3/core/skip_over.hpp> +#include <boost/spirit/home/x3/core/parser.hpp> +#include <boost/type_traits/remove_reference.hpp> +#include <boost/utility/enable_if.hpp> + +namespace boost { namespace spirit { namespace x3 +{ + // same as lexeme[], but does not pre-skip + template <typename Subject> + struct no_skip_directive : unary_parser<Subject, no_skip_directive<Subject>> + { + typedef unary_parser<Subject, no_skip_directive<Subject> > base_type; + static bool const is_pass_through_unary = true; + static bool const handles_container = Subject::handles_container; + + no_skip_directive(Subject const& subject) + : base_type(subject) {} + + template <typename Iterator, typename Context + , typename RContext, typename Attribute> + typename enable_if<has_skipper<Context>, bool>::type + parse(Iterator& first, Iterator const& last + , Context const& context, RContext& rcontext, Attribute& attr) const + { + auto const& skipper = x3::get<skipper_tag>(context); + + typedef unused_skipper< + typename remove_reference<decltype(skipper)>::type> + unused_skipper_type; + unused_skipper_type unused_skipper(skipper); + + return this->subject.parse( + first, last + , make_context<skipper_tag>(unused_skipper, context) + , rcontext + , attr); + } + template <typename Iterator, typename Context + , typename RContext, typename Attribute> + typename disable_if<has_skipper<Context>, bool>::type + parse(Iterator& first, Iterator const& last + , Context const& context, RContext& rcontext, Attribute& attr) const + { + return this->subject.parse( + first, last + , context + , rcontext + , attr); + } + }; + + struct no_skip_gen + { + template <typename Subject> + no_skip_directive<typename extension::as_parser<Subject>::value_type> + operator[](Subject const& subject) const + { + return {as_parser(subject)}; + } + }; + + no_skip_gen const no_skip = no_skip_gen(); +}}} + +#endif |