switch ( Expression ) ScopeStatement

[Derek Parnell]

On Mon, 06 Jul 2009 22:10:20 -0400, bearophile wrote:

> Derek Parnell:
>> is valid syntax! Why is that?
> 
> To allow train-wrecks like this one:
> 
> version(Tango) import tango.stdc.stdio;
> void main(char[][] args) {
>   if (args.length > 1)
>     switch (args[1]) {
>       int x = 1; // This initialization to 1 doesn't happen,
>                  // it's the same as int x = void;
>       case "1": printf("1! x=%d\n", x); break;
>       case "2": printf("2! x=%d\n", x); break;
>     }
> }

No quite the same thing, actually. You have highlighted another quirk with
switch though. 

My question was really about why is it that the first token after the "(
Expression )" did not have to be a left-brace, but could be any statement
at all. 

  switch(x) funcA();
  switch(x) switch (y) {};

Just seems wrong somehow but I'm positive that the experts have a perfectly
rational answer. I just hope I can understand it.

-- 
Derek Parnell
Melbourne, Australia
skype: derek.j.parnell