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implement is_liveness() and is_liveness_automaton()

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* spot/twaalgos/strength.cc, spot/twaalgos/strength.hh,
spot/tl/hierarchy.cc, spot/tl/hierarchy.hh: Here.
* bin/ltlfilt.cc (--liveness): New filter.
* NEWS: Mention those.
* tests/core/ltlfilt.test, tests/python/ltlsimple.py: Add test cases.
This commit is contained in:
Alexandre Duret-Lutz 2018-10-15 21:35:09 +02:00
parent d2316b1428
commit d94efe9fe1
8 changed files with 63 additions and 11 deletions
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14
spot/tl/hierarchy.hh
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@ -1,6 +1,6 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2017 Laboratoire de Recherche et Développement de
// l'Epita (LRDE)
// Copyright (C) 2017, 2018 Laboratoire de Recherche et Développement
// de l'Epita (LRDE)
//
// This file is part of Spot, a model checking library.
//
@ -184,4 +184,14 @@ namespace spot
///
/// The string should be terminated by '\0' or ']'.
SPOT_API unsigned nesting_depth(formula f, const char* opers);
/// \brief Check whether a formula represents a liveness property.
///
/// A formula represents a liveness property if any finite prefix
/// can be extended into a word accepted by the formula.
///
/// The test is done by conversion to automaton. If you already
/// have an automaton, use spot::is_liveness_automaton() instead.
SPOT_API bool is_liveness(formula f);
}