| // Copyright (c) 2009 Chris Hoeppler |
| // |
| // 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_CONFIX_JUN_22_2009_1041AM) |
| #define BOOST_SPIRIT_REPOSITORY_QI_CONFIX_JUN_22_2009_1041AM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/qi/domain.hpp> |
| #include <boost/spirit/home/qi/meta_compiler.hpp> |
| #include <boost/spirit/home/qi/auxiliary/lazy.hpp> |
| #include <boost/spirit/home/support/common_terminals.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/repository/home/support/confix.hpp> |
| |
| #include <boost/fusion/include/vector.hpp> |
| #include <boost/mpl/or.hpp> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Enablers |
| /////////////////////////////////////////////////////////////////////////// |
| |
| // enables confix(..., ...)[] |
| template <typename Prefix, typename Suffix> |
| struct use_directive<qi::domain |
| , terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> > > |
| : mpl::true_ {}; |
| |
| // enables *lazy* confix(..., ...)[] |
| template <> |
| struct use_lazy_directive<qi::domain, repository::tag::confix, 2> |
| : mpl::true_ {}; |
| |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace repository { namespace qi |
| { |
| using repository::confix_type; |
| using repository::confix; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // the confix() generated parser |
| template <typename Subject, typename Prefix, typename Suffix> |
| struct confix_parser |
| : spirit::qi::unary_parser<confix_parser<Subject, Prefix, Suffix> > |
| { |
| typedef Subject subject_type; |
| |
| template <typename Context, typename Iterator> |
| struct attribute |
| : traits::attribute_of<subject_type, Context, Iterator> |
| {}; |
| |
| confix_parser(Subject const& subject, Prefix const& prefix |
| , Suffix const& suffix) |
| : subject(subject), prefix(prefix), suffix(suffix) {} |
| |
| 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; |
| |
| if (!(prefix.parse(iter, last, context, skipper, unused) && |
| subject.parse(iter, last, context, skipper, attr) && |
| suffix.parse(iter, last, context, skipper, unused))) |
| { |
| return false; |
| } |
| |
| first = iter; |
| return true; |
| } |
| |
| template <typename Context> |
| info what(Context const& ctx) const |
| { |
| return info("confix", subject.what(ctx)); |
| } |
| |
| Subject subject; |
| Prefix prefix; |
| Suffix suffix; |
| }; |
| |
| }}}} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace qi |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Parser generators: make_xxx function (objects) |
| /////////////////////////////////////////////////////////////////////////// |
| |
| // creates confix(..., ...)[] directive |
| template <typename Prefix, typename Suffix, typename Subject |
| , typename Modifiers> |
| struct make_directive< |
| terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> > |
| , Subject, Modifiers> |
| { |
| typedef typename |
| result_of::compile<qi::domain, Prefix, Modifiers>::type |
| prefix_type; |
| typedef typename |
| result_of::compile<qi::domain, Suffix, Modifiers>::type |
| suffix_type; |
| |
| typedef repository::qi::confix_parser< |
| Subject, prefix_type, suffix_type> 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) |
| , compile<qi::domain>(fusion::at_c<1>(term.args), modifiers)); |
| } |
| }; |
| |
| }}} |
| |
| namespace boost { namespace spirit { namespace traits |
| { |
| template <typename Subject, typename Prefix, typename Suffix> |
| struct has_semantic_action< |
| repository::qi::confix_parser<Subject, Prefix, Suffix> > |
| : mpl::or_< |
| has_semantic_action<Subject> |
| , has_semantic_action<Prefix> |
| , has_semantic_action<Suffix> |
| > {}; |
| }}} |
| |
| #endif |
| |