QString: add {const_,reverse_iterator}, {c,}r{begin,end}()

Had to mark {,c,const}{begin,end}() inline, since they are, and mingw
complains about inconsistent dllimport attributes.

[ChangeLog][QtCore][QString] Added rbegin(), crbegin(), rend(), crend(),
and reverse_iterator and const_reverse_iterator typedefs.

Task-number: QTBUG-25919
Change-Id: I1d48729c76e510c1e49c0e5dc41691aa662fdf21
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qstring/tst_qstring.cpp b/tests/auto/corelib/tools/qstring/tst_qstring.cpp
index f8b9d02e1e..745cbbfad3 100644
--- a/tests/auto/corelib/tools/qstring/tst_qstring.cpp
+++ b/tests/auto/corelib/tools/qstring/tst_qstring.cpp
@@ -534,6 +534,7 @@ private slots:
     void localeAwareCompare_data();
     void localeAwareCompare();
 #endif
+    void reverseIterators();
     void split_data();
     void split();
     void split_regexp_data();
@@ -5399,6 +5400,20 @@ void tst_QString::localeAwareCompare()
 }
 #endif //!defined(Q_OS_WIN) || defined(Q_OS_WIN_AND_WINCE)
 
+void tst_QString::reverseIterators()
+{
+    QString s = "1234";
+    QString sr = s;
+    std::reverse(sr.begin(), sr.end());
+    const QString &csr = sr;
+    QVERIFY(std::equal(s.begin(), s.end(), sr.rbegin()));
+    QVERIFY(std::equal(s.begin(), s.end(), sr.crbegin()));
+    QVERIFY(std::equal(s.begin(), s.end(), csr.rbegin()));
+    QVERIFY(std::equal(sr.rbegin(), sr.rend(), s.begin()));
+    QVERIFY(std::equal(sr.crbegin(), sr.crend(), s.begin()));
+    QVERIFY(std::equal(csr.rbegin(), csr.rend(), s.begin()));
+}
+
 void tst_QString::split_data()
 {
     QTest::addColumn<QString>("str");