21c98c0a01
* src/ltlenv/environment.hh, src/ltlvisit/basicreduce.cc: Remove useless FIXMEs. * src/ltlvisit/reduce.cc (reduce_visitor::visit(binop)): Compute syntactic implications only when needed. * src/tgbaalgos/reductgba_sim_del.cc (build_recurse_successor_spoiler): Remplace the FIXME by an assert. * src/tgba/tgbareduc.cc: Reword some comments, discard old commented code.
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
// Copyright (C) 2003, 2004, 2008 Laboratoire d'Informatique de Paris
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// 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
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// Université Pierre 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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#ifndef SPOT_LTLENV_ENVIRONMENT_HH
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# define SPOT_LTLENV_ENVIRONMENT_HH
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# include "ltlast/formula.hh"
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# include <string>
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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 environment that describes atomic propositions.
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/// \ingroup ltl_essential
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class environment
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{
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public:
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/// \brief Obtain the formula associated to \a prop_str
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///
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/// Usually \a prop_str, is the name of an atomic proposition,
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/// and spot::ltl::require simply returns the associated
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/// spot::ltl::atomic_prop.
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///
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/// Note this is not a \c const method. Some environments will
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/// "create" the atomic proposition when requested.
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///
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/// We return a spot::ltl::formula instead of an
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/// spot::ltl::atomic_prop, because this
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/// will allow nifty tricks (e.g., we could name formulae in an
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/// environment, and let the parser build a larger tree from
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/// these).
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///
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/// \return 0 iff \a prop_str is not part of the environment,
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/// or the associated spot::ltl::formula otherwise.
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virtual formula* require(const std::string& prop_str) = 0;
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/// Get the name of the environment.
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virtual const std::string& name() = 0;
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virtual
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~environment()
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{
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}
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};
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}
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}
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#endif // SPOT_LTLENV_ENVIRONMENT_HH
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