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86 lines
2.3 KiB
86 lines
2.3 KiB
// Copyright 2008 Christophe Henry |
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// henry UNDERSCORE christophe AT hotmail DOT com |
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// This is an extended version of the state machine available in the boost::mpl library |
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// Distributed under the same license as the original. |
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// Copyright for the original version: |
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// Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed |
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// under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_MSM_GRAMMAR_H |
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#define BOOST_MSM_GRAMMAR_H |
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#include <boost/proto/core.hpp> |
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#include <boost/msm/common.hpp> |
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namespace boost { namespace msm |
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{ |
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// base grammar for all of msm's proto-based grammars |
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struct basic_grammar : proto::_ |
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{}; |
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// Forward-declare an expression wrapper |
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template<typename Expr> |
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struct msm_terminal; |
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struct msm_domain |
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: proto::domain< proto::generator<msm_terminal>, basic_grammar > |
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{}; |
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template<typename Expr> |
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struct msm_terminal |
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: proto::extends<Expr, msm_terminal<Expr>, msm_domain> |
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{ |
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typedef |
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proto::extends<Expr, msm_terminal<Expr>, msm_domain> |
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base_type; |
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// Needs a constructor |
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msm_terminal(Expr const &e = Expr()) |
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: base_type(e) |
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{} |
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}; |
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// grammar forbidding address of for terminals |
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struct terminal_grammar : proto::not_<proto::address_of<proto::_> > |
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{}; |
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// Forward-declare an expression wrapper |
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template<typename Expr> |
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struct euml_terminal; |
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struct sm_domain |
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: proto::domain< proto::generator<euml_terminal>, terminal_grammar, boost::msm::msm_domain > |
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{}; |
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struct state_grammar : |
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proto::and_< |
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proto::not_<proto::address_of<proto::_> >, |
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proto::not_<proto::shift_right<proto::_,proto::_> >, |
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proto::not_<proto::shift_left<proto::_,proto::_> >, |
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proto::not_<proto::bitwise_and<proto::_,proto::_> > |
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> |
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{}; |
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struct state_domain |
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: proto::domain< proto::generator<euml_terminal>, boost::msm::state_grammar,boost::msm::sm_domain > |
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{}; |
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template<typename Expr> |
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struct euml_terminal |
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: proto::extends<Expr, euml_terminal<Expr>, boost::msm::sm_domain> |
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{ |
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typedef |
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proto::extends<Expr, euml_terminal<Expr>, boost::msm::sm_domain> |
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base_type; |
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// Needs a constructor |
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euml_terminal(Expr const &e = Expr()) |
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: base_type(e) |
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{} |
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// Unhide Proto's overloaded assignment operator |
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using base_type::operator=; |
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}; |
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} } // boost::msm |
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#endif //BOOST_MSM_GRAMMAR_H |
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