Ideas regarding flow control and loops

[Daniel Keep]

downs wrote:
> Marco Aurélio wrote:
>> Hello! I've been following the development of the D programming language for some time (around 1 year), and I have to say it keeps looking better.
>>
>> I don't know if these have been proposed before, but I would like to make two suggestions regarding flow control and loops:
>>
>> 1- if behavior on "with" statement:
> 
> I used to have the same problem - I even wrote an ifIs template to get
> around the repetition.
> Then somebody clued me in to this:
> 
> if (auto foo=cast(Whee) bar) { /* use foo* }
> 
> ISN'T IT NEAT?
> <3 D.

Oh hell yeah.

>> 2 - for .. finally, while .. finally:
>>
>> This would allow having something like:
>>
>> while(someCondition)
>> {
>>     DoSomething();
>> } finally {
>>     DoOtherThing();
>> }
>>
>> The "finally" block would be called at the end of the repetition, only if no "break" was used. This may not seem useful at first, but I think can reduce the number of flags needed to implement various algorithms, making the code faster and more elegant. I'm not sure if this is already possible with scope guards.
>>
> I like that. :) vote +1
>  --downs

else would also be nice.

foreach( foo ; bar )
  DoSomethingWith(foo);

finally
  DoSomethingAfterwards();

else
  DoSomethingElseSinceBarIsEmpty();

But maybe that's just me.

	-- Daniel