Re: Ideas for Ada 200X

[amir@iae.nsk.su (Amir Yantimirov)]

aek@vib.usr.pu.ru (Alexander Kopilovitch) wrote in message news:<e2e5731a.0306180700.61b2575f@posting.google.com>...
> Bill Findlay <yaldnifw@blueyonder.co.uk> wrote in message news:<BB13CDB9.3516%yaldnifw@blueyonder.co.uk>...
> >All the proposals so far have their problems:
> >
> >   idem (or any new reserved word)  but: a new reserved word
> >   all                              but: could be a typo for "p.all"
> >   <>                               but: consider "<> < <>+1"
> >   &                                but: consider "& & &"
> >   @ (or # or ? or $ or %)          but: wrong associations?
> 
> Here is yet another one: use "~" (Ada.Characters.Latin_1.Tilde). "waver",
> but not alone - either double it or use it in conjunction with left-side
> identifier (but do not mix these variants in the same statement; also do not
> mix them with oriiginal left-side identifier). For example:
> 
>   X := ~~ + A;
> 
>   X := ~X + A;
> 
>   X := ~X + ~~; -- illegal
> 
>   X := ~X + X;  -- illegal
> 
>   X := ~~ + X;  -- illegal
> 
> 
> 
> Alexander Kopilovitch                      aek@vib.usr.pu.ru
> Saint-Petersburg
> Russia

While not omit := at all and use postfix operator in expression:

    X# + A;
    min ( X#, 0 );
    X# + # * 2;
    X#.Next;

Er, too C-ish. (Or C#-ish ?) Then so:

    idem(X) + A;
    min ( idem(X), 0);
    idem( X ) + idem * 2;
    idem( X ).Next;
?

http://www174.pair.com/yamir/programming/syntax.htm
Amir Yantimirov