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to_dca/to_nca: fix handling of co-Büchi input

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* spot/twaalgos/cobuchi.cc (to_dca, to_nca): Do not process
the input if it is already co-Büchi.
* tests/core/dca.test: Test this.
* NEWS: Mention the bug.
This commit is contained in:
Alexandre Duret-Lutz 2018-03-28 10:26:10 +02:00
parent fc205c1883
commit 7957a231a1
3 changed files with 36 additions and 2 deletions
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11
spot/twaalgos/cobuchi.cc
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@ -338,6 +338,9 @@ namespace spot
twa_graph_ptr
to_nca(const_twa_graph_ptr aut, bool named_states)
{
if (aut->acc().is_co_buchi())
return make_twa_graph(aut, twa::prop_set::all());
if (auto weak = weak_to_cobuchi(aut))
return weak;
@ -684,8 +687,12 @@ namespace spot
to_dca(const_twa_graph_ptr aut, bool named_states)
{
if (is_deterministic(aut))
if (auto weak = weak_to_cobuchi(aut))
return weak;
{
if (aut->acc().is_co_buchi())
return make_twa_graph(aut, twa::prop_set::all());
if (auto weak = weak_to_cobuchi(aut))
return weak;
}
const acc_cond::acc_code& code = aut->get_acceptance();