QtNetwork: stop using QLatin1Char constructor for creating char literals

Required for porting away from QLatin1Char/QLatin1String in scope of
QTBUG-98434.

As a drive-by, fix qsizetype -> int narrowing conversion warnings for
the touched lines.

Change-Id: I121f87214b77aeab1dfd3e62dc5adaa6255cc0e0
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

22 files changed, 63 insertions, 66 deletions

diff --git a/src/network/access/qhsts.cpp b/src/network/access/qhsts.cpp
index 99c4c605dd..8befc0b8e7 100644
--- a/src/network/access/qhsts.cpp
+++ b/src/network/access/qhsts.cpp
@@ -210,7 +210,7 @@ bool QHstsCache::isKnownHost(const QUrl &url) const
             }
         }
 
-        const int dot = nameToTest.fragment.indexOf(QLatin1Char('.'));
+        const qsizetype dot = nameToTest.fragment.indexOf(u'.');
         if (dot == -1)
             break;
 
diff --git a/src/network/access/qhttpthreaddelegate.cpp b/src/network/access/qhttpthreaddelegate.cpp
index 9774e5b43e..80ad5dfd42 100644
--- a/src/network/access/qhttpthreaddelegate.cpp
+++ b/src/network/access/qhttpthreaddelegate.cpp
@@ -172,7 +172,7 @@ static QByteArray makeCacheKey(QUrl &url, QNetworkProxy *proxy, const QString &p
     Q_UNUSED(proxy);
 #endif
     if (!peerVerifyName.isEmpty())
-        result += QLatin1Char(':') + peerVerifyName;
+        result += u':' + peerVerifyName;
     return "http-connection:" + std::move(result).toLatin1();
 }
 
diff --git a/src/network/access/qnetworkaccessfilebackend.cpp b/src/network/access/qnetworkaccessfilebackend.cpp
index b10013f67a..8f089bec3c 100644
--- a/src/network/access/qnetworkaccessfilebackend.cpp
+++ b/src/network/access/qnetworkaccessfilebackend.cpp
@@ -131,7 +131,7 @@ void QNetworkAccessFileBackend::open()
     QString fileName = url.toLocalFile();
     if (fileName.isEmpty()) {
         if (url.scheme() == QLatin1String("qrc")) {
-            fileName = QLatin1Char(':') + url.path();
+            fileName = u':' + url.path();
         } else {
 #if defined(Q_OS_ANDROID)
             if (url.scheme() == QLatin1String("assets"))
diff --git a/src/network/access/qnetworkcookie.cpp b/src/network/access/qnetworkcookie.cpp
index ee85bbccb8..b9826fe1ed 100644
--- a/src/network/access/qnetworkcookie.cpp
+++ b/src/network/access/qnetworkcookie.cpp
@@ -541,7 +541,7 @@ QByteArray QNetworkCookie::toRawForm(RawForm form) const
         }
         if (!d->domain.isEmpty()) {
             result += "; domain=";
-            if (d->domain.startsWith(QLatin1Char('.'))) {
+            if (d->domain.startsWith(u'.')) {
                 result += '.';
                 result += QUrl::toAce(d->domain.mid(1));
             } else {
@@ -1028,7 +1028,7 @@ QList<QNetworkCookie> QNetworkCookiePrivate::parseSetCookieHeaderLine(const QByt
                     if (!rawDomain.isEmpty()) {
                         QString maybeLeadingDot;
                         if (rawDomain.startsWith('.')) {
-                            maybeLeadingDot = QLatin1Char('.');
+                            maybeLeadingDot = u'.';
                             rawDomain = rawDomain.mid(1);
                         }
 
@@ -1096,9 +1096,9 @@ void QNetworkCookie::normalize(const QUrl &url)
     // don't do path checking. See QTBUG-5815
     if (d->path.isEmpty()) {
         QString pathAndFileName = url.path();
-        QString defaultPath = pathAndFileName.left(pathAndFileName.lastIndexOf(QLatin1Char('/'))+1);
+        QString defaultPath = pathAndFileName.left(pathAndFileName.lastIndexOf(u'/') + 1);
         if (defaultPath.isEmpty())
-            defaultPath = QLatin1Char('/');
+            defaultPath = u'/';
         d->path = defaultPath;
     }
 
@@ -1108,12 +1108,12 @@ void QNetworkCookie::normalize(const QUrl &url)
         QHostAddress hostAddress(d->domain);
         if (hostAddress.protocol() != QAbstractSocket::IPv4Protocol
                 && hostAddress.protocol() != QAbstractSocket::IPv6Protocol
-                && !d->domain.startsWith(QLatin1Char('.'))) {
+                && !d->domain.startsWith(u'.')) {
             // Ensure the domain starts with a dot if its field was not empty
             // in the HTTP header. There are some servers that forget the
             // leading dot and this is actually forbidden according to RFC 2109,
             // but all browsers accept it anyway so we do that as well.
-            d->domain.prepend(QLatin1Char('.'));
+            d->domain.prepend(u'.');
         }
     }
 }
diff --git a/src/network/access/qnetworkcookiejar.cpp b/src/network/access/qnetworkcookiejar.cpp
index 52da6553e4..de2449279a 100644
--- a/src/network/access/qnetworkcookiejar.cpp
+++ b/src/network/access/qnetworkcookiejar.cpp
@@ -50,7 +50,7 @@ QT_BEGIN_NAMESPACE
 static bool qIsEffectiveTLD(QStringView domain)
 {
     // provide minimal checking by not accepting cookies on real TLDs
-    return !domain.contains(QLatin1Char('.'));
+    return !domain.contains(u'.');
 }
 QT_END_NAMESPACE
 #endif
@@ -167,7 +167,7 @@ static inline bool isParentPath(const QString &path, const QString &reference)
 
 static inline bool isParentDomain(const QString &domain, const QString &reference)
 {
-    if (!reference.startsWith(QLatin1Char('.')))
+    if (!reference.startsWith(u'.'))
         return domain == reference;
 
     return domain.endsWith(reference) || domain == QStringView{reference}.mid(1);
@@ -250,13 +250,13 @@ QList<QNetworkCookie> QNetworkCookieJar::cookiesForUrl(const QUrl &url) const
             continue;
 
         QString domain = it->domain();
-        if (domain.startsWith(QLatin1Char('.'))) /// Qt6?: remove when compliant with RFC6265
+        if (domain.startsWith(u'.')) /// Qt6?: remove when compliant with RFC6265
             domain = domain.mid(1);
 #if QT_CONFIG(topleveldomain)
         if (qIsEffectiveTLD(domain) && url.host() != domain)
             continue;
 #else
-        if (!domain.contains(QLatin1Char('.')) && url.host() != domain)
+        if (!domain.contains(u'.') && url.host() != domain)
             continue;
 #endif // topleveldomain
 
@@ -356,7 +356,7 @@ bool QNetworkCookieJar::validateCookie(const QNetworkCookie &cookie, const QUrl
     if (!isParentDomain(domain, host) && !isParentDomain(host, domain))
         return false; // not accepted
 
-    if (domain.startsWith(QLatin1Char('.')))
+    if (domain.startsWith(u'.'))
         domain = domain.mid(1);
 
     // We shouldn't reject if:
diff --git a/src/network/access/qnetworkdiskcache.cpp b/src/network/access/qnetworkdiskcache.cpp
index 5f168be258..6abb92a8a0 100644
--- a/src/network/access/qnetworkdiskcache.cpp
+++ b/src/network/access/qnetworkdiskcache.cpp
@@ -148,10 +148,10 @@ void QNetworkDiskCache::setCacheDirectory(const QString &cacheDir)
     d->cacheDirectory = cacheDir;
     QDir dir(d->cacheDirectory);
     d->cacheDirectory = dir.absolutePath();
-    if (!d->cacheDirectory.endsWith(QLatin1Char('/')))
-        d->cacheDirectory += QLatin1Char('/');
+    if (!d->cacheDirectory.endsWith(u'/'))
+        d->cacheDirectory += u'/';
 
-    d->dataDirectory = d->cacheDirectory + DATA_DIR + QString::number(CACHE_VERSION) + QLatin1Char('/');
+    d->dataDirectory = d->cacheDirectory + DATA_DIR + QString::number(CACHE_VERSION) + u'/';
     d->prepareLayout();
 }
 
@@ -598,8 +598,7 @@ QString QNetworkDiskCachePrivate::uniqueFileName(const QUrl &url)
     const QByteArray id = QByteArray::number(*(qlonglong*)hash.data(), 36).left(8);
     // generates <one-char subdir>/<8-char filname.d>
     uint code = (uint)id.at(id.length()-1) % 16;
-    QString pathFragment = QString::number(code, 16) + QLatin1Char('/')
-                             + QLatin1String(id) + CACHE_POSTFIX;
+    QString pathFragment = QString::number(code, 16) + u'/' + QLatin1String(id) + CACHE_POSTFIX;
 
     return pathFragment;
 }
diff --git a/src/network/access/qnetworkreplyfileimpl.cpp b/src/network/access/qnetworkreplyfileimpl.cpp
index 96b340756a..319325df09 100644
--- a/src/network/access/qnetworkreplyfileimpl.cpp
+++ b/src/network/access/qnetworkreplyfileimpl.cpp
@@ -105,7 +105,7 @@ QNetworkReplyFileImpl::QNetworkReplyFileImpl(QNetworkAccessManager *manager, con
     if (fileName.isEmpty()) {
         const QString scheme = url.scheme();
         if (scheme == QLatin1String("qrc")) {
-            fileName = QLatin1Char(':') + url.path();
+            fileName = u':' + url.path();
         } else {
 #if defined(Q_OS_ANDROID)
             if (scheme == QLatin1String("assets"))
diff --git a/src/network/kernel/qauthenticator.cpp b/src/network/kernel/qauthenticator.cpp
index 9b398d7079..90b9c42057 100644
--- a/src/network/kernel/qauthenticator.cpp
+++ b/src/network/kernel/qauthenticator.cpp
@@ -1529,7 +1529,7 @@ static QByteArray qNtlmPhase3(QAuthenticatorPrivate *ctx, const QByteArray& phas
     Q_ASSERT(QNtlmPhase3BlockBase::Size == sizeof(QNtlmPhase3BlockBase));
 
     // for kerberos style user@domain logins, NTLM domain string should be left empty
-    if (ctx->userDomain.isEmpty() && !ctx->extractedUser.contains(QLatin1Char('@'))) {
+    if (ctx->userDomain.isEmpty() && !ctx->extractedUser.contains(u'@')) {
         offset = qEncodeNtlmString(pb.domain, offset, ch.targetNameStr, unicode);
         pb.domainStr = ch.targetNameStr;
     } else {
diff --git a/src/network/kernel/qhostaddress.cpp b/src/network/kernel/qhostaddress.cpp
index b614c65cfb..a1ee59fecf 100644
--- a/src/network/kernel/qhostaddress.cpp
+++ b/src/network/kernel/qhostaddress.cpp
@@ -137,7 +137,7 @@ void QHostAddressPrivate::setAddress(const Q_IPV6ADDR &a_)
 static bool parseIp6(const QString &address, QIPAddressUtils::IPv6Address &addr, QString *scopeId)
 {
     QStringView tmp(address);
-    int scopeIdPos = tmp.lastIndexOf(QLatin1Char('%'));
+    qsizetype scopeIdPos = tmp.lastIndexOf(u'%');
     if (scopeIdPos != -1) {
         *scopeId = tmp.mid(scopeIdPos + 1).toString();
         tmp.chop(tmp.size() - scopeIdPos);
@@ -155,7 +155,7 @@ bool QHostAddressPrivate::parse(const QString &ipString)
         return false;
 
     // All IPv6 addresses contain a ':', and may contain a '.'.
-    if (a.contains(QLatin1Char(':'))) {
+    if (a.contains(u':')) {
         quint8 maybeIp6[16];
         if (parseIp6(a, maybeIp6, &scopeId)) {
             setAddress(maybeIp6);
@@ -738,7 +738,7 @@ QString QHostAddress::toString() const
     } else if (d->protocol == QHostAddress::IPv6Protocol) {
         QIPAddressUtils::toString(s, d->a6.c);
         if (!d->scopeId.isEmpty())
-            s.append(QLatin1Char('%') + d->scopeId);
+            s.append(u'%' + d->scopeId);
     }
     return s;
 }
@@ -1043,17 +1043,17 @@ QPair<QHostAddress, int> QHostAddress::parseSubnet(const QString &subnet)
     if (subnet.isEmpty())
         return invalid;
 
-    int slash = subnet.indexOf(QLatin1Char('/'));
+    qsizetype slash = subnet.indexOf(u'/');
     QStringView netStr(subnet);
     if (slash != -1)
         netStr.truncate(slash);
 
     int netmask = -1;
-    bool isIpv6 = netStr.contains(QLatin1Char(':'));
+    bool isIpv6 = netStr.contains(u':');
 
     if (slash != -1) {
         // is the netmask given in IP-form or in bit-count form?
-        if (!isIpv6 && subnet.indexOf(QLatin1Char('.'), slash + 1) != -1) {
+        if (!isIpv6 && subnet.indexOf(u'.', slash + 1) != -1) {
             // IP-style, convert it to bit-count form
             QHostAddress mask;
             QNetmask parser;
@@ -1089,7 +1089,7 @@ QPair<QHostAddress, int> QHostAddress::parseSubnet(const QString &subnet)
         return invalid;         // invalid netmask
 
     // parse the address manually
-    auto parts = netStr.split(QLatin1Char('.'));
+    auto parts = netStr.split(u'.');
     if (parts.isEmpty() || parts.count() > 4)
         return invalid;         // invalid IPv4 address
 
diff --git a/src/network/kernel/qnetworkinterface.cpp b/src/network/kernel/qnetworkinterface.cpp
index 6fe56443bc..8c7c197b57 100644
--- a/src/network/kernel/qnetworkinterface.cpp
+++ b/src/network/kernel/qnetworkinterface.cpp
@@ -145,7 +145,7 @@ QString QNetworkInterfacePrivate::makeHwAddress(int len, uchar *data)
     QChar *out = result.data();
     for (int i = 0; i < len; ++i) {
         if (i)
-            *out++ = QLatin1Char(':');
+            *out++ = u':';
         *out++ = QLatin1Char(QtMiscUtils::toHexUpper(data[i] / 16));
         *out++ = QLatin1Char(QtMiscUtils::toHexUpper(data[i] % 16));
     }
diff --git a/src/network/kernel/qnetworkproxy.cpp b/src/network/kernel/qnetworkproxy.cpp
index 906a518a89..29dc9d2e14 100644
--- a/src/network/kernel/qnetworkproxy.cpp
+++ b/src/network/kernel/qnetworkproxy.cpp
@@ -1592,7 +1592,7 @@ QDebug operator<<(QDebug debug, const QNetworkProxy &proxy)
         scaps << QStringLiteral("SctpTunnel");
     if (caps & QNetworkProxy::SctpListeningCapability)
         scaps << QStringLiteral("SctpListen");
-    debug << '[' << scaps.join(QLatin1Char(' ')) << ']';
+    debug << '[' << scaps.join(u' ') << ']';
     return debug;
 }
 
diff --git a/src/network/kernel/qnetworkproxy_mac.cpp b/src/network/kernel/qnetworkproxy_mac.cpp
index a8327a40fb..2631de89ef 100644
--- a/src/network/kernel/qnetworkproxy_mac.cpp
+++ b/src/network/kernel/qnetworkproxy_mac.cpp
@@ -83,7 +83,7 @@ static bool isHostExcluded(CFDictionaryRef dict, const QString &host)
     if (host.isEmpty())
         return true;
 
-    bool isSimple = !host.contains(QLatin1Char('.')) && !host.contains(QLatin1Char(':'));
+    bool isSimple = !host.contains(u'.') && !host.contains(u':');
     CFNumberRef excludeSimples;
     if (isSimple &&
         (excludeSimples = (CFNumberRef)CFDictionaryGetValue(dict, kSCPropNetProxiesExcludeSimpleHostnames))) {
diff --git a/src/network/kernel/qnetworkproxy_win.cpp b/src/network/kernel/qnetworkproxy_win.cpp
index 514b26adc9..272aac6b1e 100644
--- a/src/network/kernel/qnetworkproxy_win.cpp
+++ b/src/network/kernel/qnetworkproxy_win.cpp
@@ -82,11 +82,11 @@ static bool currentProcessIsService()
 static QStringList splitSpaceSemicolon(const QString &source)
 {
     QStringList list;
-    int start = 0;
-    int end;
+    qsizetype start = 0;
+    qsizetype end;
     while (true) {
-        int space = source.indexOf(QLatin1Char(' '), start);
-        int semicolon = source.indexOf(QLatin1Char(';'), start);
+        qsizetype space = source.indexOf(u' ', start);
+        qsizetype semicolon = source.indexOf(u';', start);
         end = space;
         if (semicolon != -1 && (end == -1 || semicolon < end))
             end = semicolon;
@@ -108,7 +108,7 @@ static bool isBypassed(const QString &host, const QStringList &bypassList)
     if (host.isEmpty())
         return false;
 
-    bool isSimple = !host.contains(QLatin1Char('.')) && !host.contains(QLatin1Char(':'));
+    bool isSimple = !host.contains(u'.') && !host.contains(u':');
 
     QHostAddress ipAddress;
     bool isIpAddress = ipAddress.setAddress(host);
@@ -219,12 +219,12 @@ static QList<QNetworkProxy> parseServerList(const QNetworkProxyQuery &query, con
             && query.queryType() != QNetworkProxyQuery::TcpServer
             && query.queryType() != QNetworkProxyQuery::SctpServer;
     for (const QString &entry : proxyList) {
-        int server = 0;
+        qsizetype server = 0;
 
         QNetworkProxy::ProxyType proxyType = QNetworkProxy::HttpProxy;
         quint16 port = 8080;
 
-        int pos = entry.indexOf(QLatin1Char('='));
+        qsizetype pos = entry.indexOf(u'=');
         QStringView scheme;
         QStringView protocolTag;
         if (pos != -1) {
@@ -253,7 +253,7 @@ static QList<QNetworkProxy> parseServerList(const QNetworkProxyQuery &query, con
             }
         }
 
-        pos = entry.indexOf(QLatin1Char(':'), server);
+        pos = entry.indexOf(u':', server);
         if (pos != -1) {
             bool ok;
             uint value = QStringView{entry}.mid(pos + 1).toUInt(&ok);
diff --git a/src/network/socket/qabstractsocket.cpp b/src/network/socket/qabstractsocket.cpp
index befe136b13..7a3829e719 100644
--- a/src/network/socket/qabstractsocket.cpp
+++ b/src/network/socket/qabstractsocket.cpp
@@ -974,7 +974,7 @@ void QAbstractSocketPrivate::_q_startConnecting(const QHostInfo &hostInfo)
         if (i != 0) s += QLatin1String(", ");
         s += addresses.at(i).toString();
     }
-    s += QLatin1Char('}');
+    s += u'}';
     qDebug("QAbstractSocketPrivate::_q_startConnecting(hostInfo == %s)", s.toLatin1().constData());
 #endif
 
diff --git a/src/network/socket/qlocalserver_unix.cpp b/src/network/socket/qlocalserver_unix.cpp
index b60f7d0ceb..8740867416 100644
--- a/src/network/socket/qlocalserver_unix.cpp
+++ b/src/network/socket/qlocalserver_unix.cpp
@@ -84,11 +84,11 @@ void QLocalServerPrivate::init()
 bool QLocalServerPrivate::removeServer(const QString &name)
 {
     QString fileName;
-    if (name.startsWith(QLatin1Char('/'))) {
+    if (name.startsWith(u'/')) {
         fileName = name;
     } else {
         fileName = QDir::cleanPath(QDir::tempPath());
-        fileName += QLatin1Char('/') + name;
+        fileName += u'/' + name;
     }
     if (QFile::exists(fileName))
         return QFile::remove(fileName);
@@ -105,11 +105,11 @@ bool QLocalServerPrivate::listen(const QString &requestedServerName)
 
     // determine the full server path
     if (options.testFlag(QLocalServer::AbstractNamespaceOption)
-        ||  requestedServerName.startsWith(QLatin1Char('/'))) {
+        ||  requestedServerName.startsWith(u'/')) {
         fullServerName = requestedServerName;
     } else {
         fullServerName = QDir::cleanPath(QDir::tempPath());
-        fullServerName += QLatin1Char('/') + requestedServerName;
+        fullServerName += u'/' + requestedServerName;
     }
     serverName = requestedServerName;
 
diff --git a/src/network/socket/qlocalsocket_unix.cpp b/src/network/socket/qlocalsocket_unix.cpp
index b31d27a5aa..5e0a49d0ba 100644
--- a/src/network/socket/qlocalsocket_unix.cpp
+++ b/src/network/socket/qlocalsocket_unix.cpp
@@ -68,11 +68,11 @@ static QString pathNameForConnection(const QString &connectingName,
                                      QLocalSocket::SocketOptions options)
 {
     if (options.testFlag(QLocalSocket::AbstractNamespaceOption)
-        || connectingName.startsWith(QLatin1Char('/'))) {
+        || connectingName.startsWith(u'/')) {
         return connectingName;
     }
 
-    return QDir::tempPath() + QLatin1Char('/') + connectingName;
+    return QDir::tempPath() + u'/' + connectingName;
 }
 
 static QLocalSocket::SocketOptions optionsForPlatform(QLocalSocket::SocketOptions srcOptions)
@@ -446,7 +446,7 @@ bool QLocalSocketPrivate::parseSockaddr(const struct ::sockaddr_un &addr,
         fullServerName = name;
         serverName = abstractNamespace
                      ? name
-                     : fullServerName.mid(fullServerName.lastIndexOf(QLatin1Char('/')) + 1);
+                     : fullServerName.mid(fullServerName.lastIndexOf(u'/') + 1);
         if (serverName.isEmpty())
             serverName = fullServerName;
     }
diff --git a/src/network/socket/qsocks5socketengine.cpp b/src/network/socket/qsocks5socketengine.cpp
index ed16e2d855..ff0cc8ecfe 100644
--- a/src/network/socket/qsocks5socketengine.cpp
+++ b/src/network/socket/qsocks5socketengine.cpp
@@ -124,9 +124,9 @@ static QString dump(const QByteArray &buf)
 {
     QString data;
     for (int i = 0; i < qMin<int>(MAX_DATA_DUMP, buf.size()); ++i) {
-        if (i) data += QLatin1Char(' ');
+        if (i) data += u' ';
         uint val = (unsigned char)buf.at(i);
-       // data += QString("0x%1").arg(val, 3, 16, QLatin1Char('0'));
+       // data += QString("0x%1").arg(val, 3, 16, u'0');
         data += QString::number(val);
     }
     if (buf.size() > MAX_DATA_DUMP)
diff --git a/src/network/ssl/qsslcertificate.cpp b/src/network/ssl/qsslcertificate.cpp
index 80b6088dbc..2c1c06e3a6 100644
--- a/src/network/ssl/qsslcertificate.cpp
+++ b/src/network/ssl/qsslcertificate.cpp
@@ -658,7 +658,7 @@ QList<QSslCertificate> QSslCertificate::fromPath(const QString &path,
     QString sourcePath = QDir::fromNativeSeparators(path);
 
     // Find the path without the filename
-    QString pathPrefix = sourcePath.left(sourcePath.lastIndexOf(QLatin1Char('/')));
+    QString pathPrefix = sourcePath.left(sourcePath.lastIndexOf(u'/'));
 
     // Check if the path contains any special chars
     int pos = -1;
@@ -677,7 +677,7 @@ QList<QSslCertificate> QSslCertificate::fromPath(const QString &path,
     if (pos != -1) {
         // there was a special char in the path so cut of the part containing that char.
         pathPrefix = pathPrefix.left(pos);
-        const int lastIndexOfSlash = pathPrefix.lastIndexOf(QLatin1Char('/'));
+        const qsizetype lastIndexOfSlash = pathPrefix.lastIndexOf(u'/');
         if (lastIndexOfSlash != -1)
             pathPrefix = pathPrefix.left(lastIndexOfSlash);
         else
diff --git a/src/network/ssl/qsslconfiguration.cpp b/src/network/ssl/qsslconfiguration.cpp
index bbd9c02d34..c45b625f8a 100644
--- a/src/network/ssl/qsslconfiguration.cpp
+++ b/src/network/ssl/qsslconfiguration.cpp
@@ -634,7 +634,7 @@ void QSslConfiguration::setCiphers(const QString &ciphers)
 {
     auto *p = d.data();
     p->ciphers.clear();
-    const auto cipherNames = ciphers.split(QLatin1Char(':'), Qt::SkipEmptyParts);
+    const auto cipherNames = ciphers.split(u':', Qt::SkipEmptyParts);
     for (const QString &cipherName : cipherNames) {
         QSslCipher cipher(cipherName);
         if (!cipher.isNull())
diff --git a/src/network/ssl/qsslsocket.cpp b/src/network/ssl/qsslsocket.cpp
index 453d7a8721..63d710c652 100644
--- a/src/network/ssl/qsslsocket.cpp
+++ b/src/network/ssl/qsslsocket.cpp
@@ -3055,14 +3055,14 @@ bool QSslSocketPrivate::isMatchingHostname(const QSslCertificate &cert, const QS
  */
 bool QSslSocketPrivate::isMatchingHostname(const QString &cn, const QString &hostname)
 {
-    int wildcard = cn.indexOf(QLatin1Char('*'));
+    qsizetype wildcard = cn.indexOf(u'*');
 
     // Check this is a wildcard cert, if not then just compare the strings
     if (wildcard < 0)
         return QLatin1String(QUrl::toAce(cn)) == hostname;
 
-    int firstCnDot = cn.indexOf(QLatin1Char('.'));
-    int secondCnDot = cn.indexOf(QLatin1Char('.'), firstCnDot+1);
+    qsizetype firstCnDot = cn.indexOf(u'.');
+    qsizetype secondCnDot = cn.indexOf(u'.', firstCnDot+1);
 
     // Check at least 3 components
     if ((-1 == secondCnDot) || (secondCnDot+1 >= cn.length()))
@@ -3073,7 +3073,7 @@ bool QSslSocketPrivate::isMatchingHostname(const QString &cn, const QString &hos
         return false;
 
     // Check only one star
-    if (cn.lastIndexOf(QLatin1Char('*')) != wildcard)
+    if (cn.lastIndexOf(u'*') != wildcard)
         return false;
 
     // Reject wildcard character embedded within the A-labels or U-labels of an internationalized
@@ -3086,7 +3086,7 @@ bool QSslSocketPrivate::isMatchingHostname(const QString &cn, const QString &hos
         return false;
 
     // Check characters following first . match
-    int hnDot = hostname.indexOf(QLatin1Char('.'));
+    qsizetype hnDot = hostname.indexOf(u'.');
     if (QStringView{hostname}.mid(hnDot + 1) != QStringView{cn}.mid(firstCnDot + 1)
         && QStringView{hostname}.mid(hnDot + 1) != QLatin1String(QUrl::toAce(cn.mid(firstCnDot + 1)))) {
         return false;
diff --git a/src/network/ssl/qtlsbackend.cpp b/src/network/ssl/qtlsbackend.cpp
index 1674c7d706..7fbd27c282 100644
--- a/src/network/ssl/qtlsbackend.cpp
+++ b/src/network/ssl/qtlsbackend.cpp
@@ -806,7 +806,7 @@ QSslCipher QTlsBackend::createCiphersuite(const QString &descriptionOneLine, int
 {
     QSslCipher ciph;
 
-    const auto descriptionList = QStringView{descriptionOneLine}.split(QLatin1Char(' '), Qt::SkipEmptyParts);
+    const auto descriptionList = QStringView{descriptionOneLine}.split(u' ', Qt::SkipEmptyParts);
     if (descriptionList.size() > 5) {
         ciph.d->isNull = false;
         ciph.d->name = descriptionList.at(0).toString();
@@ -868,7 +868,7 @@ QSslCipher QTlsBackend::createCiphersuite(const QString &suiteName, QSsl::SslPro
     ciph.d->protocol = protocol;
     ciph.d->protocolString = protocolString;
 
-    const auto bits = QStringView{ciph.d->name}.split(QLatin1Char('-'));
+    const auto bits = QStringView{ciph.d->name}.split(u'-');
     if (bits.size() >= 2) {
         if (bits.size() == 2 || bits.size() == 3)
             ciph.d->keyExchangeMethod = QLatin1String("RSA");
diff --git a/src/plugins/tls/openssl/qsslsocket_openssl_symbols.cpp b/src/plugins/tls/openssl/qsslsocket_openssl_symbols.cpp
index e85c9ca051..a483c92bd2 100644
--- a/src/plugins/tls/openssl/qsslsocket_openssl_symbols.cpp
+++ b/src/plugins/tls/openssl/qsslsocket_openssl_symbols.cpp
@@ -583,8 +583,8 @@ struct LibGreaterThan
     typedef bool result_type;
     result_type operator()(QStringView lhs, QStringView rhs) const
     {
-        const auto lhsparts = lhs.split(QLatin1Char('.'));
-        const auto rhsparts = rhs.split(QLatin1Char('.'));
+        const auto lhsparts = lhs.split(u'.');
+        const auto rhsparts = rhs.split(u'.');
         Q_ASSERT(lhsparts.count() > 1 && rhsparts.count() > 1);
 
         // note: checking rhs < lhs, the same as lhs > rhs
@@ -615,8 +615,7 @@ static QStringList libraryPathList()
 {
     QStringList paths;
 #  ifdef Q_OS_DARWIN
-    paths = QString::fromLatin1(qgetenv("DYLD_LIBRARY_PATH"))
-            .split(QLatin1Char(':'), Qt::SkipEmptyParts);
+    paths = QString::fromLatin1(qgetenv("DYLD_LIBRARY_PATH")).split(u':', Qt::SkipEmptyParts);
 
     // search in .app/Contents/Frameworks
     UInt32 packageType;
@@ -627,8 +626,7 @@ static QStringList libraryPathList()
         paths << bundleUrl.resolved(frameworksUrl).path();
     }
 #  else
-    paths = QString::fromLatin1(qgetenv("LD_LIBRARY_PATH"))
-            .split(QLatin1Char(':'), Qt::SkipEmptyParts);
+    paths = QString::fromLatin1(qgetenv("LD_LIBRARY_PATH")).split(u':', Qt::SkipEmptyParts);
 #  endif
     paths << QLatin1String("/lib") << QLatin1String("/usr/lib") << QLatin1String("/usr/local/lib");
     paths << QLatin1String("/lib64") << QLatin1String("/usr/lib64") << QLatin1String("/usr/local/lib64");
@@ -659,7 +657,7 @@ static QStringList findAllLibs(QLatin1String filter)
 
         std::sort(entryList.begin(), entryList.end(), LibGreaterThan());
         for (const QString &entry : qAsConst(entryList))
-            found << path + QLatin1Char('/') + entry;
+            found << path + u'/' + entry;
     }
 
     return found;