| /*============================================================================= |
| Copyright (c) 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) |
| =============================================================================*/ |
| #ifndef BOOST_SPIRIT_X3_DIRECTIVE_RAW_HPP |
| #define BOOST_SPIRIT_X3_DIRECTIVE_RAW_HPP |
| |
| #include <boost/spirit/home/x3/core/skip_over.hpp> |
| #include <boost/spirit/home/x3/core/parser.hpp> |
| #include <boost/spirit/home/x3/support/traits/move_to.hpp> |
| #include <boost/spirit/home/x3/support/traits/pseudo_attribute.hpp> |
| #include <boost/range/iterator_range_core.hpp> |
| |
| namespace boost { namespace spirit { namespace x3 |
| { |
| // this is a pseudo attribute type indicating that the parser wants the |
| // iterator range pointing to the [first, last) matching characters from |
| // the input iterators. |
| struct raw_attribute_type {}; |
| |
| template <typename Subject> |
| struct raw_directive : unary_parser<Subject, raw_directive<Subject>> |
| { |
| typedef unary_parser<Subject, raw_directive<Subject> > base_type; |
| typedef raw_attribute_type attribute_type; |
| static bool const handles_container = true; |
| typedef Subject subject_type; |
| |
| constexpr raw_directive(Subject const& subject) |
| : base_type(subject) {} |
| |
| template <typename Iterator, typename Context |
| , typename RContext, typename Attribute> |
| bool parse(Iterator& first, Iterator const& last |
| , Context const& context, RContext& rcontext, Attribute& attr) const |
| { |
| x3::skip_over(first, last, context); |
| Iterator i = first; |
| if (this->subject.parse(i, last, context, rcontext, unused)) |
| { |
| traits::move_to(first, i, attr); |
| first = i; |
| return true; |
| } |
| return false; |
| } |
| |
| 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 raw_gen |
| { |
| template <typename Subject> |
| constexpr raw_directive<typename extension::as_parser<Subject>::value_type> |
| operator[](Subject const& subject) const |
| { |
| return { as_parser(subject) }; |
| } |
| }; |
| |
| constexpr auto raw = raw_gen{}; |
| |
| namespace traits |
| { |
| template <typename Context, typename Iterator> |
| struct pseudo_attribute<Context, raw_attribute_type, Iterator> |
| { |
| using attribute_type = raw_attribute_type; |
| using type = boost::iterator_range<Iterator>; |
| |
| static type call(Iterator& first, Iterator const& last, attribute_type) |
| { |
| return { first, last }; |
| } |
| }; |
| } |
| }}} |
| |
| #endif |