Add some missing STL typedefs and functions to QStringRef and QByteArray

These will be needed in some template code that is to come.

Change-Id: I5b93f4320313f7b15a6404de2c98f85485735fda
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>

src/corelib/tools/qbytearray.cpp

@@ -4425,6 +4425,14 @@ QByteArray QByteArray::toPercentEncoding(const QByteArray &exclude, const QByteA
     \internal
 */
 
+/*! \typedef QByteArray::size_type
+    \internal
+*/
+
+/*! \typedef QByteArray::difference_type
+    \internal
+*/
+
 /*! \typedef QByteArray::const_reference
     \internal
 */
@@ -4433,6 +4441,14 @@ QByteArray QByteArray::toPercentEncoding(const QByteArray &exclude, const QByteA
     \internal
 */
 
+/*! \typedef QByteArray::const_pointer
+    \internal
+*/
+
+/*! \typedef QByteArray::pointer
+    \internal
+*/
+
 /*! \typedef QByteArray::value_type
   \internal
  */

src/corelib/tools/qbytearray.h

@@ -389,8 +389,12 @@ public:
     const_iterator constEnd() const;
 
     // stl compatibility
+    typedef int size_type;
+    typedef qptrdiff difference_type;
     typedef const char & const_reference;
     typedef char & reference;
+    typedef char *pointer;
+    typedef const char *const_pointer;
     typedef char value_type;
     void push_back(char c);
     void push_back(const char *c);

src/corelib/tools/qstring.cpp

@@ -8370,6 +8370,30 @@ QDataStream &operator>>(QDataStream &in, QString &str)
     \sa {Implicitly Shared Classes}
 */
 
+/*!
+    \typedef QStringRef::size_type
+    \internal
+*/
+
+/*!
+    \typedef QStringRef::value_type
+    \internal
+*/
+
+/*!
+    \typedef QStringRef::const_pointer
+    \internal
+*/
+
+/*!
+    \typedef QStringRef::const_reference
+    \internal
+*/
+
+/*!
+    \typedef QStringRef::const_iterator
+    \internal
+*/
 
 /*!
  \fn QStringRef::QStringRef()
@@ -8492,6 +8516,32 @@ ownership of it, no memory is freed when instances are destroyed.
     Same as unicode().
 */
 
+/*!
+    \fn const QChar *QStringRef::begin() const
+
+    Same as unicode().
+*/
+
+/*!
+    \fn const QChar *QStringRef::cbegin() const
+
+    Same as unicode().
+*/
+
+/*!
+    \fn const QChar *QStringRef::end() const
+
+    Returns a pointer to one character past the last one in this string.
+    (It is the same as \c {unicode() + size()}.)
+*/
+
+/*!
+    \fn const QChar *QStringRef::cend() const
+
+    Returns a pointer to one character past the last one in this string.
+    (It is the same as \c {unicode() + size()}.)
+*/
+
 /*!
     \fn const QChar *QStringRef::constData() const
 

src/corelib/tools/qstring.h

@@ -1264,6 +1264,12 @@ class Q_CORE_EXPORT QStringRef {
     int m_position;
     int m_size;
 public:
+    typedef QString::size_type size_type;
+    typedef QString::value_type value_type;
+    typedef QString::const_iterator const_iterator;
+    typedef QString::const_pointer const_pointer;
+    typedef QString::const_reference const_reference;
+
     // ### Qt 6: make this constructor constexpr, after the destructor is made trivial
     inline QStringRef():m_string(0), m_position(0), m_size(0){}
     inline QStringRef(const QString *string, int position, int size);
@@ -1333,6 +1339,10 @@ public:
     }
     inline const QChar *data() const { return unicode(); }
     inline const QChar *constData() const {  return unicode(); }
+    inline const QChar *begin() const { return unicode(); }
+    inline const QChar *cbegin() const { return unicode(); }
+    inline const QChar *end() const { return unicode() + size(); }
+    inline const QChar *cend() const { return unicode() + size(); }
 
 #if QT_DEPRECATED_SINCE(5, 0)
     QT_DEPRECATED QByteArray toAscii() const Q_REQUIRED_RESULT