What does `..` mean in an argument list?

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1

I have seen it in some glutin code as

        match event {
            glutin::event::Event::WindowEvent { event, .. } => match event {

and...

match cause {
                glutin::event::StartCause::ResumeTimeReached { .. } => ()
2

It's called the "rest" pattern, it means "ignore everything else".

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