6853977be2
src/ltlast/binop.hh, src/ltlast/constant.hh, src/ltlast/formula.hh, src/ltlast/multop.hh, src/ltlast/predecl.hh, src/ltlast/refformula.hh, src/ltlast/unop.hh, src/ltlast/visitor.hh: Use file to introduce each file.
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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// et Marie Curie.
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Spot; see the file COPYING. If not, write to the Free
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// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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// 02111-1307, USA.
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/// \file ltlast/formula.hh
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/// \brief LTL formula interface
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#ifndef SPOT_LTLAST_FORMULAE_HH
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# define SPOT_LTLAST_FORMULAE_HH
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#include "predecl.hh"
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namespace spot
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{
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namespace ltl
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{
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/// \brief An LTL formula.
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///
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/// The only way you can work with a formula is to
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/// build a spot::ltl::visitor or spot::ltl::const_visitor.
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class formula
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{
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public:
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virtual ~formula();
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/// Entry point for vspot::ltl::visitor instances.
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virtual void accept(visitor& v) = 0;
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/// Entry point for vspot::ltl::const_visitor instances.
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virtual void accept(const_visitor& v) const = 0;
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/// \brief clone this node
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///
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/// This increments the reference counter of this node (if one is
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/// used). You should almost never use this method directly as
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/// it doesn't touch the children. If you want to clone a
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/// whole formula, use spot::ltl::clone() instead.
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formula* ref();
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/// \brief release this node
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///
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/// This decrements the reference counter of this node (if one is
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/// used) and can free the object. You should almost never use
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/// this method directly as it doesn't touch the children. If you
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/// want to release a whole formula, use spot::ltl::destroy() instead.
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static void unref(formula* f);
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protected:
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/// \brief increment reference counter if any
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virtual void ref_();
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/// \brief decrement reference counter if any, return true when
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/// the instance must be deleted (usually when the counter hits 0).
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virtual bool unref_();
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};
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}
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}
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#endif // SPOT_LTLAST_FORMULAE_HH
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