tokio::select! cfg-gated

[pickfire]

Is your feature request related to a problem? Please describe.

Select with part of it cfg-gated. Like #[cfg(not(windows))].

Describe the solution you'd like

tokio::select! {
    #[cfg(not(windows))]
    Some(signal) = self.signals.next() => ...
}

Describe alternatives you've considered

I think the macro could take in a meta but that includes other non-cfg stuff, not sure if we want that.

The only workaround is to duplicate the whole block with if cfg!.

[Darksonn]

Interesting. I don't know how you would implement this, but it seems like a reasonable feature to have.