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Allow atomic propositions negated with a combining overline.

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* src/ltlparse/ltlscan.ll: Understand the combining overline, and
combining overbar as synonym for =0.
* src/ltlvisit/tostring.cc: Emit a combining overline for
single-letter atomic propositions.
* src/ltlast/atomic_prop.hh (is_atomic_prop): New function.
* doc/tl/tl.tex: Document these two characters.
This commit is contained in:
Alexandre Duret-Lutz 2012-04-29 19:25:43 +02:00
parent 1319e18e1d
commit 6ea88efddc
4 changed files with 39 additions and 6 deletions
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13
src/ltlast/atomic_prop.hh
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@ -1,7 +1,8 @@
// Copyright (C) 2009 Laboratoire de Recherche et Développement
// -*- coding: utf-8 -*-
// Copyright (C) 2009, 2012 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
//
// This file is part of Spot, a model checking library.
@ -75,6 +76,14 @@ namespace spot
environment* env_;
};
inline
const atomic_prop*
is_atomic_prop(const formula* f)
{
if (f->kind() != formula::AtomicProp)
return 0;
return static_cast<const atomic_prop*>(f);
}
}
}