when clause on default label

[kyoyama-kazusa]

There is no support for when clause followed with a default label inside a switch statement:

switch (expr)
{
    default when ...:
        break;
}

I must write case var _ when ... instead:

switch (expr)
{
    case var _ when ...:
        break;
}

Because a discard cannot be used as a top-level pattern, I cannot use simpler syntax like case _ when ....

Any suggestions here? Thanks.

[KennethHoff]

This feels like.. I don't know if oversight is the best word, but certainly feels inconsistent with switch expressions, because the following is legal:

var value = expr switch
{
	_ when a => ... ,
	_ when b => ... ,
	_ when c => ... ,
}

Granted, I guess it technically is the same syntax as the alternative mentioned above (case var _ when a: ...), but it's not idiomatic like how it would be with switch exprs.

[333fred]

I'd be willing to champion default when for switch statements.