QVarLengthArray: add qHash overload

[ChangeLog][QtCore][QVarLengthArray] Added a qHash overload.

Change-Id: I771203ae3bb575b49f70e9114287dd2690031b42
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

src/corelib/tools/qvarlengtharray.h

@@ -44,6 +44,7 @@
 #include <QtCore/qglobal.h>
 #include <QtCore/qalgorithms.h>
 #include <QtCore/qcontainertools_impl.h>
+#include <QtCore/qhashfunctions.h>
 
 #include <algorithm>
 #include <initializer_list>
@@ -599,6 +600,13 @@ inline bool operator>=(const QVarLengthArray<T, Prealloc1> &lhs, const QVarLengt
     return !(lhs < rhs);
 }
 
+template <typename T, int Prealloc>
+uint qHash(const QVarLengthArray<T, Prealloc> &key, uint seed = 0)
+    noexcept(noexcept(qHashRange(key.cbegin(), key.cend(), seed)))
+{
+    return qHashRange(key.cbegin(), key.cend(), seed);
+}
+
 QT_END_NAMESPACE
 
 #endif // QVARLENGTHARRAY_H

src/corelib/tools/qvarlengtharray.qdoc

@@ -903,3 +903,11 @@
     \sa indexOf(), lastIndexOf()
 */
 
+/*!
+    template <typename T, int Prealloc> uint qHash(const QVarLengthArray<T, Prealloc> &key, uint seed = 0)
+    \relates QVarLengthArray
+    \since 5.14
+
+    Returns the hash value for \a key, using \a seed to seed the
+    calculation.
+*/