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improve some comments

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* spot/twaalgos/complement.hh, spot/twaalgos/complement.cc: Here.
This commit is contained in:
Alexandre Duret-Lutz 2024-07-04 12:11:10 +02:00
parent 2274308cad
commit e48506f548
2 changed files with 6 additions and 4 deletions
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7
spot/twaalgos/complement.cc
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@ -515,7 +515,7 @@ namespace spot
twa_graph_ptr res = dualize(aut); twa_graph_ptr res = dualize(aut);
// There are cases with "t" acceptance that get converted to // There are cases with "t" acceptance that get converted to
// Büchi during completion, then dualized to co-Büchi, but the // Büchi during completion, then dualized to co-Büchi, but the
// acceptance is still not used. To try to clean it up in this // acceptance is still not used. Try to clean it up in this
// case. // case.
if (aut->num_sets() == 0 || if (aut->num_sets() == 0 ||
// Also dualize removes sink states, but doesn't simplify // Also dualize removes sink states, but doesn't simplify
@ -525,8 +525,9 @@ namespace spot
return res; return res;
} }
if (is_very_weak_automaton(aut)) if (is_very_weak_automaton(aut))
// removing alternation may need more acceptance sets than we support. // Removing alternation may need more acceptance sets than Spot
// in this case res==nullptr and we try the other determinization. // supports. When this happens res==nullptr and we fall back to
// determinization-based complementation.
if (twa_graph_ptr res = remove_alternation(dualize(aut), false, if (twa_graph_ptr res = remove_alternation(dualize(aut), false,
aborter, false)) aborter, false))
return res; return res;

3
spot/twaalgos/complement.hh
View file

@ -73,7 +73,8 @@ namespace spot
/// If an output_aborter is supplied, it is used to /// If an output_aborter is supplied, it is used to
/// abort the construction of larger automata. /// abort the construction of larger automata.
/// ///
/// complement_semidet() is not yet used. /// complement_semidet() is not yet used, as it is not always better
/// when the input is semi-deterministic.
SPOT_API twa_graph_ptr SPOT_API twa_graph_ptr
complement(const const_twa_graph_ptr& aut, complement(const const_twa_graph_ptr& aut,
const output_aborter* aborter = nullptr); const output_aborter* aborter = nullptr);