QString: Fix in-place toUpper/Lower when there's size expansion

When that happens, we need to detach (in-place conversion won't work),
so we recurse back into the same function, but the template version that
does detaching.

Task-number: QTBUG-49181
Change-Id: Idba8c29717f34c70a58fffff1412fea3acc95f98
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/corelib/tools/qstringiterator_p.h b/src/corelib/tools/qstringiterator_p.h
index 06b05de833..1c098a314d 100644
--- a/src/corelib/tools/qstringiterator_p.h
+++ b/src/corelib/tools/qstringiterator_p.h
@@ -69,6 +69,13 @@ public:
     {
     }
 
+    inline explicit QStringIterator(const QChar *begin, int idx, const QChar *end)
+        : i(begin),
+          pos(begin + idx),
+          e(end)
+    {
+    }
+
     inline QString::const_iterator position() const
     {
         return pos;