QDebug: add getter/setter for noQuotes

There were setters (quote(), noquote()), but, unlike
space()/nospace(), there was no getter.

Add the getter, and, for symmetry, a parametrized setter, too.

[ChangeLog][QtCore][QDebug] Added setQuoteStrings()/quoteStrings() to
access and manipulate the quote()/noquote() state.

Change-Id: I1b73138819b4d02726a6ef862c190206431ccebc
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qdebug.cpp

@@ -506,6 +506,29 @@ QDebug &QDebug::resetFormat()
 */
 
 
+/*!
+    \fn bool QDebug::quoteStrings() const
+    \since 6.7
+
+    Returns \c true if this QDebug instance will quote strings streamed into
+    it (which is the default).
+
+    \sa QDebugStateSaver, quote(), noquote(), setQuoteStrings()
+*/
+
+/*!
+    \fn void QDebug::setQuoteStrings(bool b)
+    \since 6.7
+
+    Enables quoting of strings streamed into this QDebug instance if \a b is
+    \c true; otherwise quoting is disabled.
+
+    The default is to quote strings.
+
+    \sa QDebugStateSaver, quote(), noquote(), quoteStrings()
+*/
+
+
 /*!
     \fn QDebug &QDebug::quote()
     \since 5.4

src/corelib/io/qdebug.h

@@ -93,6 +93,9 @@ public:
     bool autoInsertSpaces() const { return stream->space; }
     void setAutoInsertSpaces(bool b) { stream->space = b; }
 
+    [[nodiscard]] bool quoteStrings() const noexcept { return !stream->noQuotes; }
+    void setQuoteStrings(bool b) { stream->noQuotes = !b; }
+
     inline QDebug &quote() { stream->noQuotes = false; return *this; }
     inline QDebug &noquote() { stream->noQuotes = true; return *this; }
     inline QDebug &maybeQuote(char c = '"') { if (!stream->noQuotes) stream->ts << c; return *this; }

tests/auto/corelib/io/qdebug/tst_qdebug.cpp

@@ -318,11 +318,17 @@ void tst_QDebug::debugNoQuotes() const
     MessageHandlerSetter mhs(myMessageHandler);
     {
         QDebug d = qDebug();
+        QVERIFY(d.quoteStrings());
         d << QStringLiteral("Hello");
+        QVERIFY(d.quoteStrings());
         d.noquote();
+        QVERIFY(!d.quoteStrings());
         d << QStringLiteral("Hello");
+        QVERIFY(!d.quoteStrings());
         d.quote();
+        QVERIFY(d.quoteStrings());
         d << QStringLiteral("Hello");
+        QVERIFY(d.quoteStrings());
     }
     QCOMPARE(s_msg, QString::fromLatin1("\"Hello\" Hello \"Hello\""));
 
@@ -331,7 +337,7 @@ void tst_QDebug::debugNoQuotes() const
         d << QChar('H');
         d << QLatin1String("Hello");
         d << QByteArray("Hello");
-        d.noquote();
+        d.setQuoteStrings(false);
         d << QChar('H');
         d << QLatin1String("Hello");
         d << QByteArray("Hello");