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Add a constant_term() visitor to decide whether #e is accepted.

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* src/ltlvisit/Makefile.am: Add consterm.cc and consterm.hh.
* src/ltlvisit/consterm.hh, src/ltlvisit/consterm.cc: New files.
* src/ltltest/Makefile.am: Add consterm.cc and consterm.test.
* src/ltltest/consterm.cc, src/ltltest/consterm.test: New files.
This commit is contained in:
Alexandre Duret-Lutz 2010-01-11 16:01:38 +01:00
parent 2d1aa0a5a0
commit 97b7211bb7
6 changed files with 307 additions and 1 deletions
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54
src/ltlvisit/consterm.hh Normal file
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// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'EPITA (LRDE).
//
// 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 2 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 Spot; see the file COPYING. If not, write to the Free
// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
#ifndef SPOT_LTLVISIT_CONSTERM_HH
# define SPOT_LTLVISIT_CONSTERM_HH
#include "ltlast/formula.hh"
namespace spot
{
namespace ltl
{
/// \brief Compute the constant term of a formula.
/// \ingroup ltl_misc
///
/// The constant term of a formula is the empty word if the empty
/// word is a model of the formula, it is false otherwise.
///
/// \see constant_term_as_bool
formula* constant_term(const formula* f);
/// \brief Compute the constant term of a formula.
/// \ingroup ltl_misc
///
/// The constant term of a formula is the empty word if the empty
/// word is a model of the formula, it is false otherwise.
///
/// This variant of the function return true instead of
/// constant::empty_word_instance() and false instead of
/// constant::false_instance().
///
/// \see constant_term
bool constant_term_as_bool(const formula* f);
}
}
#endif // SPOT_LTLVISIT_LENGTH_HH