20c088a45a
* src/ltlvisit/nenoform.cc, src/ltlvisit/lunabbrev.cc, src/ltlvisit/simpfg.cc, src/ltlvisit/tunabbrev.cc: Do not recurse if the formula properties indicate that it is already in the right form.
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
// Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
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// de l'Epita (LRDE).
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// Copyright (C) 2003 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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#include "ltlast/allnodes.hh"
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#include "tunabbrev.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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unabbreviate_ltl_visitor::unabbreviate_ltl_visitor()
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{
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}
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unabbreviate_ltl_visitor::~unabbreviate_ltl_visitor()
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{
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}
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void
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unabbreviate_ltl_visitor::visit(unop* uo)
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{
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switch (uo->op())
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{
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case unop::Finish:
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case unop::X:
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case unop::Not:
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case unop::Closure:
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case unop::NegClosure:
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this->super::visit(uo);
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return;
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case unop::F:
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result_ = binop::instance(binop::U,
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constant::true_instance(),
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recurse(uo->child()));
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return;
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case unop::G:
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result_ = binop::instance(binop::R,
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constant::false_instance(),
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recurse(uo->child()));
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return;
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}
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}
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formula*
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unabbreviate_ltl_visitor::recurse(formula* f)
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{
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return unabbreviate_ltl(f);
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}
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formula*
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unabbreviate_ltl(const formula* f)
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{
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if (f->is_sugar_free_boolean() && f->is_sugar_free_ltl())
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return f->clone();
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unabbreviate_ltl_visitor v;
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const_cast<formula*>(f)->accept(v);
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return v.result();
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}
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}
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}
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