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Disable useless-cast warning for moc generated code 

The useless-cast gcc warning is disabled in the files generated by
the moc. A typical warning is like

using_t = void(Counter::*)(int );
if (*reinterpret_cast<_t*>(_a[1]) ==
    static_cast<_t>(&Counter::valueChanged)) {
        *result = 0;
         return;
    }

Removing the static cast results in a compilation error
"address of overloaded function with no contextual type-of
information" in moc_myobject.cpp files.

Checking whether we have an overload set or a single function
might be too much effort for too little benefit and may not worth
it.

Fixes: QTBUG-71938
Change-Id: I6f67e163a3493b51fb95f54218ce6bf9a302f824
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
bb10
Mate Barany 2022-06-20 14:26:38 +02:00
parent 0c82d6a75a
commit b9b5734559
1 changed files with 1 additions and 0 deletions
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1
src/tools/moc/moc.cpp
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@ -1107,6 +1107,7 @@ void Moc::generate(FILE *out, FILE *jsonOutput)
fprintf(out, "QT_BEGIN_MOC_NAMESPACE\n");
fprintf(out, "QT_WARNING_PUSH\n");
fprintf(out, "QT_WARNING_DISABLE_DEPRECATED\n");
fprintf(out, "QT_WARNING_DISABLE_GCC(\"-Wuseless-cast\")\n");
fputs("", out);
for (i = 0; i < classList.size(); ++i) {