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87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// 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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