spot/src/ltlvisit/simpfg.cc
Alexandre Duret-Lutz 2369389850 formula: replace nth() by operator[]()
* src/ltlast/formula.hh (formula::nth): Replace by ...
(formula::operator[]): ... this.
* src/ltlvisit/mark.cc, src/ltlvisit/mutation.cc, src/ltlvisit/print.cc,
src/ltlvisit/relabel.cc, src/ltlvisit/remove_x.cc,
src/ltlvisit/simpfg.cc, src/ltlvisit/simplify.cc, src/ltlvisit/snf.cc,
src/ltlvisit/unabbrev.cc, src/twa/formula2bdd.cc,
src/twaalgos/compsusp.cc, src/twaalgos/ltl2taa.cc,
src/twaalgos/ltl2tgba_fm.cc, wrap/python/spot_impl.i: Adjust.
2015-09-28 08:31:53 +02:00

47 lines
1.4 KiB
C++

// -*- coding: utf-8 -*-
// Copyright (C) 2010, 2012, 2014, 2015 Laboratoire de Recherche et
// Développement de l'Epita (LRDE).
// Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
//
// This file is part of Spot, a model checking library.
//
// Spot is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// Spot is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "simpfg.hh"
namespace spot
{
namespace ltl
{
formula simplify_f_g(formula p)
{
// 1 U p = Fp
if (p.is(op::U) && p[0].is_true())
return formula::F(p[1]);
// 0 R p = Gp
if (p.is(op::R) && p[0].is_false())
return formula::G(p[1]);
// p W 0 = Gp
if (p.is(op::W) && p[1].is_false())
return formula::G(p[0]);
// p M 1 = Fp
if (p.is(op::M) && p[1].is_true())
return formula::F(p[0]);
return p.map(simplify_f_g);
}
}
}