Re: Ada++

[Optikos <ZUERCHER_Andreas@outlook.com>]

On Friday, May 29, 2020 at 6:09:20 AM UTC-5, björn lundin wrote:
> Den 2020-05-29 kl. 04:57, skrev Rick Newbie:
> > The curly braces are definitely not a problem
> 
> If you ever lost one in the middle, you know that they ARE a problem
> 
> end if/end case /end proc-name /end func.name /end package name /end 
> loop etc
> makes it much easier too see where somehing ends
> 
> switch (a)
> {
>     case 1 :
>      {
>        if (B==C)
>        {
>           while (true)
>           {
>             doSometing1();
>             done = doSometing2();
>             if done break;
>           }
>        }
>     }
> }
> 
> compared to
> 
> case a is
>    when 1 =>
>      if B = C then
>        loop
>           Do_Someting1;
>           Done := Do_Someting2;
>           exit when Done;
>        end loop;
>      end if;
>    when others => null;
> end case;
> 
> 
> -- 
> Björn

Well, to be fair, C and its progeny have botched the original BCPL block-statement bracketing hints.

https://dl.acm.org/doi/pdf/10.1145/988131.988138

As depicted in the article above, the BCPL feature applied to C would be the following, including compile-time enforcement to assure that the programmer-chosen bra tags match the programmer-chosen ket tags (where bra-ket is slang for open bracket and close bracket).

switch (a)
{sa
    case 1 :
     {c1
       if (B==C)
       {ifBC
          while (true)
          {wT
            doSometing1();
            done = doSometing2();
            if done break;
          }wT
       }ifBC
    }c1
}sa

As also mentioned in the above-linked article, PL/I had an analogous label-based mechanism for
LBL: block-statement here END LBL;
which, btw, Green-Ada partially borrowed due its limited amount of competitiveness with Red-PL/I.