| // Copyright (c) 2001-2010 Hartmut Kaiser |
| // Copyright (c) 2001-2010 Joel de Guzman |
| // Copyright (c) 2003 Vaclav Vesely |
| // |
| // 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_REPOSITORY_QI_DISTINCT_MAY_20_2009_0825M) |
| #define SPIRIT_REPOSITORY_QI_DISTINCT_MAY_20_2009_0825M |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/qi/skip_over.hpp> |
| #include <boost/spirit/home/qi/domain.hpp> |
| #include <boost/spirit/home/qi/parser.hpp> |
| #include <boost/spirit/home/qi/meta_compiler.hpp> |
| #include <boost/spirit/home/qi/detail/unused_skipper.hpp> |
| #include <boost/spirit/home/support/common_terminals.hpp> |
| #include <boost/spirit/home/support/make_component.hpp> |
| #include <boost/spirit/home/support/info.hpp> |
| #include <boost/spirit/home/support/unused.hpp> |
| #include <boost/spirit/home/qi/detail/attributes.hpp> |
| #include <boost/spirit/home/support/string_traits.hpp> |
| #include <boost/spirit/home/qi/auxiliary/eps.hpp> |
| #include <boost/spirit/home/qi/auxiliary/lazy.hpp> |
| #include <boost/spirit/home/qi/directive/lexeme.hpp> |
| #include <boost/spirit/home/qi/operator/not_predicate.hpp> |
| |
| #include <boost/spirit/repository/home/support/distinct.hpp> |
| |
| #include <boost/fusion/include/at.hpp> |
| #include <boost/fusion/include/vector.hpp> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Enablers |
| /////////////////////////////////////////////////////////////////////////// |
| |
| // enables distinct(...)[...] |
| template <typename Tail> |
| struct use_directive<qi::domain |
| , terminal_ex<repository::tag::distinct, fusion::vector1<Tail> > > |
| : mpl::true_ {}; |
| |
| // enables *lazy* distinct(...)[...] |
| template <> |
| struct use_lazy_directive<qi::domain, repository::tag::distinct, 1> |
| : mpl::true_ {}; |
| |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace repository {namespace qi |
| { |
| using repository::distinct_type; |
| using repository::distinct; |
| |
| template <typename Subject, typename Tail, typename Modifier> |
| struct distinct_parser |
| : spirit::qi::unary_parser<distinct_parser<Subject, Tail, Modifier> > |
| { |
| template <typename Context, typename Iterator> |
| struct attribute |
| : traits::attribute_of<Subject, Context, Iterator> |
| {}; |
| |
| distinct_parser(Subject const& subject, Tail const& tail) |
| : subject(subject), tail(tail) {} |
| |
| template <typename Iterator, typename Context |
| , typename Skipper, typename Attribute> |
| bool parse(Iterator& first, Iterator const& last |
| , Context& context, Skipper const& skipper, Attribute& attr) const |
| { |
| Iterator iter = first; |
| |
| spirit::qi::skip_over(iter, last, skipper); |
| if (!subject.parse(iter, last, context |
| , spirit::qi::detail::unused_skipper<Skipper>(skipper), attr)) |
| return false; |
| |
| Iterator i = iter; |
| if (tail.parse(i, last, context, unused, unused)) |
| return false; |
| |
| first = iter; |
| return true; |
| } |
| |
| template <typename Context> |
| info what(Context& /*ctx*/) const |
| { |
| return info("distinct"); |
| } |
| |
| Subject subject; |
| Tail tail; |
| }; |
| |
| }}}} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace qi |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Parser generators: make_xxx function (objects) |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Tail, typename Subject, typename Modifiers> |
| struct make_directive< |
| terminal_ex<repository::tag::distinct, fusion::vector1<Tail> > |
| , Subject, Modifiers> |
| { |
| typedef typename result_of::compile<qi::domain, Tail, Modifiers>::type |
| tail_type; |
| |
| typedef repository::qi::distinct_parser< |
| Subject, tail_type, Modifiers> result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, Subject const& subject |
| , Modifiers const& modifiers) const |
| { |
| return result_type(subject |
| , compile<qi::domain>(fusion::at_c<0>(term.args), modifiers)); |
| } |
| }; |
| |
| }}} |
| |
| namespace boost { namespace spirit { namespace traits |
| { |
| template <typename Subject, typename Tail, typename Modifier> |
| struct has_semantic_action< |
| repository::qi::distinct_parser<Subject, Tail, Modifier> > |
| : unary_has_semantic_action<Subject> {}; |
| }}} |
| |
| #endif |
| |