'with(Foo):' not allowed, why?

[Fgr via Digitalmars-d-learn]

On Saturday, 9 August 2014 at 09:52:02 UTC, Messenger wrote:
> On Saturday, 9 August 2014 at 09:11:53 UTC, Marc Schütz wrote:
>> On Saturday, 9 August 2014 at 03:46:05 UTC, timotheecour wrote:
>>> On Wednesday, 6 August 2014 at 17:03:23 UTC, Timothee Cour via
>>> Digitalmars-d-learn wrote:
>>>> Is there a reason why 'with(Foo):' is not allowed, and we 
>>>> have to
>>>> use with(Foo){...} ?
>>>> It would be more in line with how other scope definitions 
>>>> work (extern(C)
>>>> etc)
>>>
>>> ping, anyone?
>>
>> Probably for syntactic reasons: `with` is a statement, while 
>> `extern(C)`, `@safe`, `private` etc. are attributes.
>>
>> But the idea is certainly nice, it would only require a simple 
>> rewriting rule.
>
> Also a way to cancel such...
>
>   struct Foo {
>   @nogc:
>
>     void bar() {
>       with (someEnum):
>       // ...
>       !:with (someEnum)  // ?
>       // ...
>     }
>
>   !:@nogc  // ?
>
>     void gcFunction() { /*...*/ }
>   }

with(x):
without(x); // cancel
without(); // cancel following with() declarations order.


with(x):
     with(y):
         with(z):

         without()// no more z
         without(x) // no more x
without() // only one remaining so no more y

But isn't the with expression considered as a bad practice 
(whatever the lang. is) ?