| // Copyright (c) 2001-2010 Hartmut Kaiser |
| // |
| // 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(BOOST_SPIRIT_REPOSITORY_QI_ITER_POS_NOV_20_2009_1245PM) |
| #define BOOST_SPIRIT_REPOSITORY_QI_ITER_POS_NOV_20_2009_1245PM |
| |
| #include <boost/spirit/include/qi_parse.hpp> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // definition the place holder |
| namespace boost { namespace spirit { namespace repository { namespace qi |
| { |
| BOOST_SPIRIT_TERMINAL(iter_pos); |
| }}}} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // implementation the enabler |
| namespace boost { namespace spirit |
| { |
| // We want custom_parser::iter_pos to be usable as a terminal only, |
| // and only for parser expressions (qi::domain). |
| template <> |
| struct use_terminal<qi::domain, repository::qi::tag::iter_pos> |
| : mpl::true_ |
| {}; |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // implementation of the parser |
| namespace boost { namespace spirit { namespace repository { namespace qi |
| { |
| struct iter_pos_parser |
| : boost::spirit::qi::primitive_parser<iter_pos_parser> |
| { |
| // Define the attribute type exposed by this parser component |
| template <typename Context, typename Iterator> |
| struct attribute |
| { |
| typedef Iterator type; |
| }; |
| |
| // This function is called during the actual parsing process |
| template <typename Iterator, typename Context |
| , typename Skipper, typename Attribute> |
| bool parse(Iterator& first, Iterator const& last |
| , Context&, Skipper const& skipper, Attribute& attr) const |
| { |
| boost::spirit::qi::skip_over(first, last, skipper); |
| boost::spirit::traits::assign_to(first, attr); |
| return true; |
| } |
| |
| // This function is called during error handling to create |
| // a human readable string for the error context. |
| template <typename Context> |
| boost::spirit::info what(Context&) const |
| { |
| return boost::spirit::info("iter_pos"); |
| } |
| }; |
| }}}} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // instantiation of the parser |
| namespace boost { namespace spirit { namespace qi |
| { |
| // This is the factory function object invoked in order to create |
| // an instance of our iter_pos_parser. |
| template <typename Modifiers> |
| struct make_primitive<repository::qi::tag::iter_pos, Modifiers> |
| { |
| typedef repository::qi::iter_pos_parser result_type; |
| |
| result_type operator()(unused_type, unused_type) const |
| { |
| return result_type(); |
| } |
| }; |
| }}} |
| |
| #endif |