QMetaType: Support char16_t and char32_t

Change-Id: Ieec6d4bc64967d875ea12b31638aab05bc682ea3
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

src/corelib/kernel/qmetatype.h

@@ -85,6 +85,8 @@ inline Q_DECL_CONSTEXPR int qMetaTypeId();
     F(Long, 32, long) \
     F(Short, 33, short) \
     F(Char, 34, char) \
+    F(Char16, 56, char16_t) \
+    F(Char32, 57, char32_t) \
     F(ULong, 35, ulong) \
     F(UShort, 36, ushort) \
     F(UChar, 37, uchar) \
@@ -451,7 +453,7 @@ public:
         QT_FOR_EACH_STATIC_TYPE(QT_DEFINE_METATYPE_ID)
 
         FirstCoreType = Bool,
-        LastCoreType = QCborMap,
+        LastCoreType = Char32,
         FirstGuiType = QFont,
         LastGuiType = QColorSpace,
         FirstWidgetsType = QSizePolicy,
@@ -482,6 +484,7 @@ public:
         Nullptr = 51,
         QVariantMap = 8, QVariantList = 9, QVariantHash = 28,
         QCborSimpleType = 52, QCborValue = 53, QCborArray = 54, QCborMap = 55,
+        Char16 = 56, Char32 = 57,
 
         // Gui types
         QFont = 64, QPixmap = 65, QBrush = 66, QColor = 67, QPalette = 68,

src/corelib/serialization/qdatastream.cpp

@@ -1025,6 +1025,31 @@ QDataStream &QDataStream::operator>>(char *&s)
     return readBytes(s, len);
 }
 
+/*!
+ \overload
+
+ Reads a char from the stream into char \a chr.
+*/
+QDataStream &QDataStream::operator>>(char16_t &c)
+{
+    quint16 u;
+    *this >> u;
+    c = char16_t(u);
+    return *this;
+}
+
+/*!
+ \overload
+
+ Reads a char from the stream into char \a chr.
+*/
+QDataStream &QDataStream::operator>>(char32_t &c)
+{
+    quint32 u;
+    *this >> u;
+    c = char32_t(u);
+    return *this;
+}
 
 /*!
     Reads the buffer \a s from the stream and returns a reference to
@@ -1337,6 +1362,30 @@ QDataStream &QDataStream::operator<<(const char *s)
     return *this;
 }
 
+/*!
+  \overload
+  \since 6.0
+
+  Writes a character, \a c, to the stream. Returns a reference to
+  the stream
+*/
+QDataStream &QDataStream::operator<<(char16_t c)
+{
+    return *this << qint16(c);
+}
+
+/*!
+  \overload
+  \since 6.0
+
+  Writes a character, \a c, to the stream. Returns a reference to
+  the stream
+*/
+QDataStream &QDataStream::operator<<(char32_t c)
+{
+    return *this << qint32(c);
+}
+
 /*!
     Writes the length specifier \a len and the buffer \a s to the
     stream and returns a reference to the stream.

src/corelib/serialization/qdatastream.h

@@ -163,6 +163,8 @@ public:
     QDataStream &operator>>(float &f);
     QDataStream &operator>>(double &f);
     QDataStream &operator>>(char *&str);
+    QDataStream &operator>>(char16_t &c);
+    QDataStream &operator>>(char32_t &c);
 
     QDataStream &operator<<(qint8 i);
     QDataStream &operator<<(quint8 i);
@@ -178,6 +180,9 @@ public:
     QDataStream &operator<<(float f);
     QDataStream &operator<<(double f);
     QDataStream &operator<<(const char *str);
+    QDataStream &operator<<(char16_t c);
+    QDataStream &operator<<(char32_t c);
+
 
     QDataStream &readBytes(char *&, uint &len);
     int readRawData(char *, int len);

tests/auto/corelib/kernel/qmetatype/tst_qmetatype.h

@@ -136,6 +136,12 @@ template<> struct TestValueFactory<QMetaType::Short> {
 template<> struct TestValueFactory<QMetaType::Char> {
     static char *create() { return new char('c'); }
 };
+template<> struct TestValueFactory<QMetaType::Char16> {
+    static char16_t *create() { return new char16_t('c'); }
+};
+template<> struct TestValueFactory<QMetaType::Char32> {
+    static char32_t *create() { return new char32_t('c'); }
+};
 template<> struct TestValueFactory<QMetaType::ULong> {
     static ulong *create() { return new ulong(ULONG_MAX); }
 };