qstring-arg: Warn when using chainged args()

Using multi-arg overloads saves heap allocations

BUG: 353771

2 files changed, 6 insertions, 0 deletions

diff --git a/tests/qstring-arg/main.cpp b/tests/qstring-arg/main.cpp
index 867a3b90..7dd92048 100644
--- a/tests/qstring-arg/main.cpp
+++ b/tests/qstring-arg/main.cpp
@@ -23,4 +23,8 @@ void test()
     s = s.arg(1, m_labelFieldWidth); // OK
     s = s.arg(1, latitude); // Warning
     QString("%1").arg(s, -38); // OK
+    QString s2, s3, s4, s5;
+    s5 = QString("%1 %2 %3 %4").arg(s).arg(s1).arg(s3, s4); // Warning
+    QString().arg(s1, s2, s3, s4, s5).arg(s1, s2, s3, s4, s5); // OK
+    QString().arg(s1, s2, s3, s4, s5).arg(s1, s2, s3, s4); // Warning
 }
diff --git a/tests/qstring-arg/test.expected b/tests/qstring-arg/test.expected
index 31e36a5b..99c35a56 100644
--- a/tests/qstring-arg/test.expected
+++ b/tests/qstring-arg/test.expected
@@ -1,3 +1,5 @@
 main.cpp:19:9: warning: Using QString::arg() with fillChar overload [-Wclazy-qstring-arg]
 main.cpp:20:9: warning: Using QString::arg() with fillChar overload [-Wclazy-qstring-arg]
 main.cpp:24:9: warning: Using QString::arg() with fillChar overload [-Wclazy-qstring-arg]
+main.cpp:27:46: warning: Use multi-arg instead [-Wclazy-qstring-arg]
+main.cpp:29:37: warning: Use multi-arg instead [-Wclazy-qstring-arg]