| /*============================================================================= |
| Copyright (c) 2001-2007 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) |
| ==============================================================================*/ |
| #if !defined(BOOST_SPIRIT_META_GRAMMAR_FEB_05_2007_0320PM) |
| #define BOOST_SPIRIT_META_GRAMMAR_FEB_05_2007_0320PM |
| |
| #include <boost/spirit/home/support/modifier.hpp> |
| #include <boost/spirit/home/support/placeholders.hpp> |
| #include <boost/spirit/home/support/meta_grammar.hpp> |
| #include <boost/spirit/home/qi/domain.hpp> |
| #include <boost/spirit/home/support/iso8859_1.hpp> |
| #include <boost/spirit/home/support/ascii.hpp> |
| #include <boost/spirit/home/support/standard.hpp> |
| #include <boost/spirit/home/support/standard_wide.hpp> |
| #include <boost/utility/enable_if.hpp> |
| |
| namespace boost { namespace spirit { namespace qi |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // forwards |
| /////////////////////////////////////////////////////////////////////////// |
| struct lexeme_director; |
| struct omit_director; |
| struct raw_director; |
| struct main_meta_grammar; |
| |
| template <typename Expr, typename Enable> |
| struct is_valid_expr; |
| |
| template <typename Expr, typename Enable> |
| struct expr_transform; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // directive meta-grammars |
| /////////////////////////////////////////////////////////////////////////// |
| struct directive_meta_grammar |
| : proto::or_< |
| meta_grammar::deep_directive_meta_grammar< |
| spirit::char_class::no_case_tag<proto::_> |
| , main_meta_grammar |
| > |
| , meta_grammar::binary_rule_rhs< |
| qi::domain, proto::tag::subscript, lexeme_director |
| , proto::terminal<tag::lexeme>, main_meta_grammar |
| > |
| , meta_grammar::binary_rule_rhs< |
| qi::domain, proto::tag::subscript, omit_director |
| , proto::terminal<tag::omit>, main_meta_grammar |
| > |
| , meta_grammar::binary_rule_rhs< |
| qi::domain, proto::tag::subscript, raw_director |
| , proto::terminal<tag::raw>, main_meta_grammar |
| > |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // These specializations non-intrusively hooks into the RD meta-grammar. |
| // (see qi/meta_grammar.hpp) |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Expr> |
| struct is_valid_expr<Expr |
| , typename enable_if<proto::matches<Expr, directive_meta_grammar> >::type> |
| : mpl::true_ |
| { |
| }; |
| |
| template <typename Expr> |
| struct expr_transform<Expr |
| , typename enable_if<proto::matches<Expr, directive_meta_grammar> >::type> |
| : mpl::identity<directive_meta_grammar> |
| { |
| }; |
| }}} |
| |
| #endif |