JSON: add some QStringView overloads

[ChangeLog][QtCore][JSON] Added overloads of functions taking key
strings as QStringView; in QJsonObject, QJsonValue and QJsonDocument.

Change-Id: I78b40aba8200003acfae257ff06f5f15737005e7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Anton Kudryavtsev <antkudr@mail.ru>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/corelib/serialization/qjsondocument.cpp b/src/corelib/serialization/qjsondocument.cpp
index f8027efb58..193b80ee22 100644
--- a/src/corelib/serialization/qjsondocument.cpp
+++ b/src/corelib/serialization/qjsondocument.cpp
@@ -544,6 +544,7 @@ void QJsonDocument::setArray(const QJsonArray &array)
     d->ref.ref();
 }
 
+#if QT_STRINGVIEW_LEVEL < 2
 /*!
     Returns a QJsonValue representing the value for the key \a key.
 
@@ -558,6 +559,16 @@ void QJsonDocument::setArray(const QJsonArray &array)
  */
 const QJsonValue QJsonDocument::operator[](const QString &key) const
 {
+    return (*this)[QStringView(key)];
+}
+#endif
+
+/*!
+    \overload
+    \since 5.14
+*/
+const QJsonValue QJsonDocument::operator[](QStringView key) const
+{
     if (!isObject())
         return QJsonValue(QJsonValue::Undefined);