qt-everywhere-src-5.14.1/qtbase/src/corelib/doc/snippets/code/src_corelib_tools_qstring.cpp

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//! [0]
DEFINES += QT_NO_CAST_FROM_ASCII \
           QT_NO_CAST_TO_ASCII
//! [0]


//! [1]
QString url = QLatin1String("http://www.unicode.org/");
//! [1]


//! [2]
double d = 12.34;
QString str = QString("delta: %1").arg(d, 0, 'E', 3);
// str == "delta: 1.234E+01"
//! [2]


//! [3]
if (str == "auto" || str == "extern"
        || str == "static" || str == "register") {
    ...
}
//! [3]


//! [4]
if (str == QString("auto") || str == QString("extern")
        || str == QString("static") || str == QString("register")) {
    ...
}
//! [4]


//! [5]
if (str == QLatin1String("auto")
        || str == QLatin1String("extern")
        || str == QLatin1String("static")
        || str == QLatin1String("register") {
    ...
}
//! [5]


//! [6]
QLabel *label = new QLabel(QLatin1String("MOD"), this);
//! [6]


//! [7]
QString plain = "#include <QtCore>"
QString html = plain.toHtmlEscaped();
// html == "#include &lt;QtCore&gt;"
//! [7]

//! [8]
QString str("ab");
str.repeated(4);            // returns "abababab"
//! [8]

//! [9]
// hasAttribute takes a QString argument
if (node.hasAttribute("http-contents-length")) //...
//! [9]

//! [10]
if (node.hasAttribute(QStringLiteral(u"http-contents-length"))) //...
//! [10]

//! [11]
if (attribute.name() == QLatin1String("http-contents-length")) //...
//! [11]