QML: Port QV4::CompiledData::JSClassMember to new special integer bitfield

Task-number: QTBUG-99545
Change-Id: I0a7d86450011f1664d61db4d78317dafbcfbb8cf
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
(cherry picked from commit b5a8a6943ab979e23db284780df9209af5ae03a8)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/src/qml/common/qv4compileddata_p.h b/src/qml/common/qv4compileddata_p.h
index b819681247..7d57d5deff 100644
--- a/src/qml/common/qv4compileddata_p.h
+++ b/src/qml/common/qv4compileddata_p.h
@@ -199,13 +199,21 @@ static_assert(sizeof(Lookup) == 4, "Lookup structure needs to have the expected
 
 struct JSClassMember
 {
-    union {
-        quint32 _dummy;
-        quint32_le_bitfield<0, 31> nameOffset;
-        quint32_le_bitfield<31, 1> isAccessor;
-    };
+    JSClassMember() : m_data(QSpecialIntegerBitfieldZero) {}
+
+    void set(quint32 nameOffset, bool isAccessor)
+    {
+        m_data.set<NameOffsetField>(nameOffset);
+        m_data.set<IsAccessorField>(isAccessor ? 1 : 0);
+    }
 
-    JSClassMember() : _dummy(0) { }
+    quint32 nameOffset() const { return m_data.get<NameOffsetField>(); }
+    bool isAccessor() const { return m_data.get<IsAccessorField>() != 0; }
+
+private:
+    using NameOffsetField = quint32_le_bitfield_member<0, 31>;
+    using IsAccessorField = quint32_le_bitfield_member<31, 1>;
+    quint32_le_bitfield_union<NameOffsetField, IsAccessorField> m_data;
 };
 static_assert(sizeof(JSClassMember) == 4, "JSClassMember structure needs to have the expected size to be binary compatible on disk when generated by host compiler and loaded by target");