QStringView/QLatin1String: add trimmed()

... using the same qt_trimmed(), qTrimmed(), Q..::trimmed() split we've
been using for all other out-of-line string-view member functions to
avoid forcing string-view objects onto the stack for the passing of 'this'.

In the test, had to fix nullness not being propagated from a QByteArray
to the QLatin1String constructed from it. Probably worth fixing in
QLatin1String(QByteArray), too.

[ChangeLog][QtCore] Added qTrimmed() free functions.

[ChangeLog][QtCore][QLatin1String] Added trimmed() function.

Change-Id: I73c18ef87e203f30f7552c10dd5c84223bcfae0e
Reviewed-by: Anton Kudryavtsev <antkudr@mail.ru>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 5 insertions, 1 deletions

diff --git a/tests/auto/corelib/tools/qstringapisymmetry/tst_qstringapisymmetry.cpp b/tests/auto/corelib/tools/qstringapisymmetry/tst_qstringapisymmetry.cpp
index 0c495d2c8f..e482b409a5 100644
--- a/tests/auto/corelib/tools/qstringapisymmetry/tst_qstringapisymmetry.cpp
+++ b/tests/auto/corelib/tools/qstringapisymmetry/tst_qstringapisymmetry.cpp
@@ -349,6 +349,10 @@ private Q_SLOTS:
     void trim_trimmed_QString() { trimmed_impl<QString>(); }
     void trim_trimmed_QStringRef_data() { trimmed_data(); }
     void trim_trimmed_QStringRef() { trimmed_impl<QStringRef>(); }
+    void trim_trimmed_QStringView_data() { trimmed_data(); }
+    void trim_trimmed_QStringView() { trimmed_impl<QStringView>(); }
+    void trim_trimmed_QLatin1String_data() { trimmed_data(); }
+    void trim_trimmed_QLatin1String() { trimmed_impl<QLatin1String>(); }
     void trim_trimmed_QByteArray_data() { trimmed_data(); }
     void trim_trimmed_QByteArray() { trimmed_impl<QByteArray>(); }
 
@@ -1050,7 +1054,7 @@ void tst_QStringApiSymmetry::trimmed_impl()
 
     const auto utf8 = unicode.toUtf8();
     const auto l1s  = unicode.toLatin1();
-    const auto l1   = QLatin1String(l1s);
+    const auto l1   = l1s.isNull() ? QLatin1String() : QLatin1String(l1s);
 
     const auto ref = unicode.isNull() ? QStringRef() : QStringRef(&unicode);
     const auto s = make<String>(ref, l1, utf8);