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  1. Qt
  2. QTBUG-78820

Qt Moc doesn't recognize [[maybe_unused]] on enumeration

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Details

    • Bug
    • Resolution: Duplicate
    • P2: Important
    • None
    • 5.12.2
    • Build tools: moc
    • None
    • All

    Description

       

      // qtbase\bin\moc.exe -Iqtbase\include t.h -ot_moc.cpp
#pragma once

#include <QtCore/QObject>
struct C final : public QObject {

 Q_OBJECT
enum class E { V [[maybe_unused]] };
};

       

      This code gives the following error:

       

      t.h(7): Parse error at "V"

      This is considered valid c++ code according to cppreference: https://en.cppreference.com/w/cpp/language/attributes/maybe_unused and was recently used by clang to suppress warnings: https://bugs.llvm.org/show_bug.cgi?id=36231

       

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            ogoffart Olivier Goffart (Woboq GmbH)
            jvapen Jeroen Van Antwerpen
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              Created:
              Updated:
              Resolved:

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