QJniArray: make reverse-iterable

Add rbeing/rend overload, relevant typedefs, and decrement operators.
As a drive-by, add noexcept to begin/end functions.

Found during header review.

Pick-to: 6.7
Task-number: QTBUG-119952
Change-Id: I32d9a7d50a1f03550944c2247516c455d4822fe7
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/auto/corelib/kernel/qjniarray/tst_qjniarray.cpp b/tests/auto/corelib/kernel/qjniarray/tst_qjniarray.cpp
index 65dd832e92..bbbec2fc90 100644
--- a/tests/auto/corelib/kernel/qjniarray/tst_qjniarray.cpp
+++ b/tests/auto/corelib/kernel/qjniarray/tst_qjniarray.cpp
@@ -104,6 +104,17 @@ void tst_QJniArray::operators()
         QCOMPARE(++it, array.end());
     }
     {
+        auto it = array.rbegin();
+        QCOMPARE(*it, 'e');
+        QCOMPARE(*++it, 'd');
+        QCOMPARE(*it++, 'd');
+        QCOMPARE(*it, 'c');
+        ++it;
+        it++;
+        QCOMPARE(*it, 'a');
+        QCOMPARE(++it, array.rend());
+    }
+    {
         QJniArray<jbyte>::const_iterator it = {};
         QCOMPARE(it, QJniArray<jbyte>::const_iterator{});
         QCOMPARE_NE(array.begin(), array.end());