| // Copyright (c) 2001-2009 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_KARMA_DELIMITER_META_GRAMMAR_FEB_21_2007_0826PM) |
| #define BOOST_SPIRIT_KARMA_DELIMITER_META_GRAMMAR_FEB_21_2007_0826PM |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| #pragma once // MS compatible compilers support #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/modifier.hpp> |
| #include <boost/spirit/home/support/meta_grammar.hpp> |
| #include <boost/spirit/home/karma/domain.hpp> |
| #include <boost/utility/enable_if.hpp> |
| #include <boost/mpl/if.hpp> |
| #include <boost/mpl/or.hpp> |
| |
| namespace boost { namespace spirit { namespace karma |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // forwards |
| /////////////////////////////////////////////////////////////////////////// |
| struct main_meta_grammar; |
| |
| struct delimit_; |
| struct delimit_space; |
| struct verbatim; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Expr, typename Enable> |
| struct is_valid_expr; |
| |
| template <typename Expr, typename Enable> |
| struct expr_transform; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // delimit and verbatim directive meta-grammars |
| // delimit[...], delimit(delimiter)[...] and verbatim[...] |
| /////////////////////////////////////////////////////////////////////////// |
| struct delimiter_directive_meta_grammar |
| : proto::or_< |
| meta_grammar::binary_rule< |
| karma::domain, proto::tag::subscript, verbatim, |
| proto::terminal<tag::verbatim>, main_meta_grammar |
| >, |
| meta_grammar::binary_rule< |
| karma::domain, proto::tag::subscript, delimit_space, |
| proto::terminal<tag::delimit>, main_meta_grammar |
| >, |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::delimit, delimit_, |
| main_meta_grammar, main_meta_grammar |
| > |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // These specializations non-intrusively hook into the Karma meta-grammar. |
| // (see karma/meta_grammar.hpp) |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Expr> |
| struct is_valid_expr< |
| Expr, |
| typename enable_if< |
| proto::matches<Expr, delimiter_directive_meta_grammar> |
| >::type |
| > |
| : mpl::true_ |
| { |
| }; |
| |
| template <typename Expr> |
| struct expr_transform< |
| Expr, |
| typename enable_if< |
| proto::matches<Expr, delimiter_directive_meta_grammar> |
| >::type |
| > |
| : mpl::identity<delimiter_directive_meta_grammar> |
| { |
| }; |
| |
| }}} |
| |
| #endif |