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relabel: introduce an overlapping relabeling version

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Related to issue #500 and issue #536.

* spot/tl/relabel.hh (relabel_overlapping_bse): New function.
* spot/tl/relabel.cc: Implement it.
* bin/ltlfilt.cc: Add a --relabel-overlapping-bool option.
* tests/core/ltlfilt.test: Test it.
* NEWS: Mention it.
This commit is contained in:
Alexandre Duret-Lutz 2023-08-28 15:42:19 +02:00
parent 14347cdc52
commit 18478e663f
5 changed files with 207 additions and 48 deletions
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23
spot/tl/relabel.hh
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@ -1,5 +1,5 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2012, 2013, 2015, 2019 Laboratoire de Recherche et
// Copyright (C) 2012, 2013, 2015, 2019, 2023 Laboratoire de Recherche et
// Développement de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
@ -34,6 +34,9 @@ namespace spot
///
/// If \a m is non-null, it is filled with correspondence
/// between the new names (keys) and the old names (values).
///
/// \see relabel_bse
/// \see relabel_overlaping_bse
SPOT_API
formula relabel(formula f, relabeling_style style,
relabeling_map* m = nullptr);
@ -45,9 +48,27 @@ namespace spot
///
/// If \a m is non-null, it is filled with correspondence
/// between the new names (keys) and the old names (values).
///
/// The relabel_overlapping_bse() will introduce a new atomic
/// proposition for each maximal Boolean subexpression encountered,
/// even if they overlap (i.e., share common atomic
/// propositions). For instance `(a & b & c) U (c & d & e)` will be
/// simply be relabeled as `p0 U p1`. This kind of renaming to not
/// preserves the
///
/// The relabel_bse() version will make sure that the replaced
/// subexpressions do not share atomic propositions. For instance
/// `(a & b & c) U (c & d & e)` will be simply be relabeled as
/// `(p0 & p1) U (p1 & p2)`, were `p1` replaces `c` and the rest
/// is obvious.
///
/// @{
SPOT_API
formula relabel_bse(formula f, relabeling_style style,
relabeling_map* m = nullptr);
SPOT_API formula
relabel_overlapping_bse(formula f, relabeling_style style, relabeling_map* m);
// @}
/// \ingroup tl_rewriting
/// \brief Replace atomic propositions of \a f by subformulas