Read utf8 file to QString in Qt

Question

How can I read an entire UTF-8 encoded file to a QString in Qt, and is there a one-liner similar to C#'s string contents = File.ReadAllText(@"C:\temp\test.txt");

Answer 1

The shortest I got to was this:

QFile f("foo.txt");
f.open(QFile::ReadOnly);
QString s = QString::fromUtf8(f.readAll());

I was hoping to use something like QString::fromUtf8(QFile("foo.txt").readAll()) which is a one-liner albeit clunky, but the constructor doesn't open the file, so you need to declare a variable and the shortest is 3 lines.