Re: "continue/next" for "loop"

[jimmaureenrogers@worldnet.att.net (Jim Rogers)]

Lutz Donnerhacke <lutz@iks-jena.de> wrote in message news:<slrnbqckoa.m1.lutz@taranis.iks-jena.de>...
> But both are the result of an oversimplification!
> 
> outer: loop
>   inner: loop
>     Complex_Actions_1;
>     if First_Condition then
>       Some_Justify_Actions;
>       goto next_outer;
>     end if;
>     Complex_Actions_2;
>     if Second_Condition then
>       Some_Other_Justify_Actions;
>       goto next_outer;
>     end if;
>     Complex_Actions_3;
>   end loop inner;
>   Complex_End_Statments;
>   exit outer when Other_Condition;
>   More_Statments;
> 
>   <<next_outer>> null;
> end loop outer;
> 
> I'd like to find a more amazing version of this braindead goto.
> Please do not assume, that I'm too stupid to invert a condition in a
> simplified example. IT'S NOT HOMEWORK!

Upon further consideration of your example above I see that you could
look upon the early break out of the inner loop as an exceptional condition,
or as a set of exceptional conditions. Given this, another solution is
the use of exceptions.

 First_Condition_Exception : Exception;
 Second_Condition_Exception : Exception;

 outer: loop
   begin
     inner: loop
       Complex_Actions_1;
       if First_Condition then
         raise First_Condition_Exception;
       end if;
       Complex_Actions_2;
       if Second_Condition then
         raise Second_Condition_Exception;
       end if;
       Complex_Actions_3;
     end loop inner;
     Complex_End_Statments;
     exit outer when Other_Condition;
     More_Statments;
 
   Exception
      when First_Condition_Exception =>
         Some_Justify_Actions;
      when Second_Condition_Exception =>
         Some_Other_Justify_Actions;
   end;
 end loop outer;

Jim Rogers