moc: Fix parsing of [[deprecated]] enum values

moc now successfully parses enum values, that have been deprecated with
[[deprecated]]. This is valid c++17 and should be handled correctly.
By adding that functionality it is possible to parse Windows headers
which use this deprecation mechanism.

To make sure, that moc works correctly even on compilers that do not
support deprecated enum values yet, the auto test explicitly uses
[[deprecated]] enum values during moc run.

Fixes: QTBUG-74126
Change-Id: I7b9d9a49af6093a97f8fdb800ffbc5af3d54d262
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/auto/tools/moc/tst_moc.cpp b/tests/auto/tools/moc/tst_moc.cpp
index 4e5d902aa2..f12df578f4 100644
--- a/tests/auto/tools/moc/tst_moc.cpp
+++ b/tests/auto/tools/moc/tst_moc.cpp
@@ -3926,6 +3926,23 @@ void tst_Moc::cxxAttributes()
                   }) {
         QVERIFY(so.indexOfSlot(a) != 1);
     }
+
+    QCOMPARE(TestQNamespaceDeprecated::staticMetaObject.enumeratorCount(), 2);
+    checkEnum(TestQNamespaceDeprecated::staticMetaObject.enumerator(0), "TestEnum1",
+                {{"Key1", 11}, {"Key2", 12}, {"Key3", 13}, {"Key4", 14}, {"Key5", 15}, {"Key6", 16},
+                 {"Key7", 17}});
+    checkEnum(TestQNamespaceDeprecated::staticMetaObject.enumerator(1), "TestFlag1",
+                {{"None", 0}, {"Flag1", 1}, {"Flag2", 2}, {"Flag3", 3}, {"Any", 1 | 2 | 3}});
+
+    QCOMPARE(TestQNamespaceDeprecated::TestGadget::staticMetaObject.enumeratorCount(), 1);
+    checkEnum(TestQNamespaceDeprecated::TestGadget::staticMetaObject.enumerator(0), "TestGEnum1",
+                {{"Key1", 13}, {"Key2", 14}, {"Key3", 15}});
+
+    QMetaEnum meta = QMetaEnum::fromType<TestQNamespaceDeprecated::TestEnum1>();
+    QVERIFY(meta.isValid());
+    QCOMPARE(meta.name(), "TestEnum1");
+    QCOMPARE(meta.enclosingMetaObject(), &TestQNamespaceDeprecated::staticMetaObject);
+    QCOMPARE(meta.keyCount(), 7);
 }
 
 QTEST_MAIN(tst_Moc)