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Fix warnings with GCC 7 on Centos 7

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* spot/twa/twagraph.cc: Mark two variables as unused.
* spot/twaalgos/aiger.cc: Avoid spurious nullptr dereference warning,
and mark more variable as unused.
* spot/twaalgos/forq_contains.cc (word::operator==): Mark as
maybe_unused.
* bin/ltlsynt.cc, spot/twaalgos/relabel.cc,
spot/twaalgos/mealy_machine.cc, spot/twaalgos/synthesis.cc,
spot/twaalgos/zlktree.cc: Avoid unused variables warnings.
* spot/twaalgos/toparity.cc: Remove uses of std::optional, they were
not necessary, and they trigger spurious warnings in GCC 7.  Also
work around a spurious "potential nullptr deref".
* tests/core/twacube.cc: Fix another potential nullptr warning.
* spot/twaalgos/simulation.cc: Work a around GCC 6/7 bug.
This commit is contained in:
Alexandre Duret-Lutz 2023-10-15 00:21:12 +02:00
parent 1a2746e182
commit 75f3a5f2c5
11 changed files with 115 additions and 107 deletions
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7
tests/core/twacube.cc
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@ -1,5 +1,5 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2015, 2016, 2018, 2020 Laboratoire de Recherche et
// Copyright (C) 2015, 2016, 2018, 2020, 2023 Laboratoire de Recherche et
// Développement de l'Epita.
//
// This file is part of Spot, a model checking library.
@ -78,7 +78,10 @@ int main()
const std::vector<std::string>& aps = aut->ap();
unsigned int seed = 17;
for (auto it = aut->succ(2); !it->done(); it->next())
auto it = aut->succ(2);
SPOT_ASSUME(it); // GCC 7 warns about potential nullptr.
for (; !it->done(); it->next())
for (; !it->done(); it->next())
{
auto& t = aut->trans_storage(it, seed);
auto& d = aut->trans_data(it, seed);