S11nScope.hpp

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/*CXXR $Id: S11nScope.hpp 1392 2013-07-02 10:19:57Z arr $
 *CXXR
 *CXXR This file is part of CXXR, a project to refactor the R interpreter
 *CXXR into C++.  It may consist in whole or in part of program code and
 *CXXR documentation taken from the R project itself, incorporated into
 *CXXR CXXR (and possibly MODIFIED) under the terms of the GNU General Public
 *CXXR Licence.
 *CXXR 
 *CXXR CXXR is Copyright (C) 2008-13 Andrew R. Runnalls, subject to such other
 *CXXR copyrights and copyright restrictions as may be stated below.
 *CXXR 
 *CXXR CXXR is not part of the R project, and bugs and other issues should
 *CXXR not be reported via r-bugs or other R project channels; instead refer
 *CXXR to the CXXR website.
 *CXXR */

#ifndef S11NSCOPE_HPP
#define S11NSCOPE_HPP 1

#include <map>
#include <boost/utility.hpp>

namespace CXXR {
    class GCNode;

    class S11nScope : public boost::noncopyable {
    public:
        S11nScope();

        ~S11nScope();

        static void defineRelocation(GCNode* from, GCNode* to);

        static GCNode* relocate(GCNode* from);
    private:
        static S11nScope* s_innermost;

        S11nScope* m_next;

        std::map<GCNode*, GCNode*> m_relocations;

        // Report out-of-sequence destructor call and abort program.
        // (We can't use an exception here because it's called from a
        // destructor.)
        static void seqError();
    };
}  // namespace CXXR

#endif  // S11NSCOPE_HPP