QStringList: add op= overloads for QList<QString>

QStringList = QList<QString> already compiled, but was interpreted as
QStringList = QStringList(QList<QString>), which involves the QList
copy ctor. Adding the overload saves that copy.

Cannot use a using declaration here, since the return type is different.

Change-Id: I9f4feb2f97480d2d6a3b6fa7c71b5d511b623601
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qstringlist/tst_qstringlist.cpp b/tests/auto/corelib/tools/qstringlist/tst_qstringlist.cpp
index d5506f3391..91501a0106 100644
--- a/tests/auto/corelib/tools/qstringlist/tst_qstringlist.cpp
+++ b/tests/auto/corelib/tools/qstringlist/tst_qstringlist.cpp
@@ -66,6 +66,7 @@ private slots:
     void lastIndexOf_regExp();
 
     void streamingOperator();
+    void assignmentOperator();
     void join() const;
     void join_data() const;
     void joinEmptiness() const;
@@ -344,6 +345,21 @@ void tst_QStringList::streamingOperator()
     QCOMPARE(list2 << list3, QStringList() << "adam" << "eva");
 }
 
+void tst_QStringList::assignmentOperator()
+{
+    // compile-only test
+
+    QStringList adam;
+    adam << "adam";
+    QList<QString> eva;
+    eva << "eva";
+    QStringList result;
+    QStringList &ref1 = (result = adam);
+    QStringList &ref2 = (result = eva);
+    Q_UNUSED(ref1);
+    Q_UNUSED(ref2);
+}
+
 void tst_QStringList::join() const
 {
     QFETCH(QStringList, input);