Switch case falltrhough, regression or intended behavior ?

[Jonathan M Davis]

On Sunday, February 17, 2013 17:26:01 Stewart Gordon wrote:
> On 17/02/2013 16:10, deadalnix wrote:
> > I have several instance of cases like this :
> > 
> > switch(c) {
> > 
> >      case 'U', 'u' :
> >      
> >      case 'L', 'l' :
> >          // code . . .
> > 
> > }
> > 
> > dmd from master complains about it (Error: switch case fallthrough - use
> > 'goto case;' if intended). It used to work.
> 
> <snip>
> 
> Implicit fall through shouldn't have been allowed from the beginning.  It
> would appear that this has finally been banned.

Implicit fallthrough is a warning when a case stament is non-empty, but if 
it's empty (as in the example), then there is no warning. If the compiler is 
warning about falling through an empty case statement, it's a bug.

- Jonathan M Davis