[fpc-devel] "Blank slate" next version of FPC

Dimitrios Chr. Ioannidis d.ioannidis at nephelae.eu
Wed Feb 20 16:24:19 CET 2019


Στις 20/2/2019 4:46 μ.μ., ο Paul van Helden έγραψε:
> On Wed, Feb 20, 2019 at 4:35 PM Dimitrios Chr. Ioannidis via fpc-devel 
> <fpc-devel at lists.freepascal.org 
> <mailto:fpc-devel at lists.freepascal.org>> wrote:
>       Even if declaring variables as close as possible to where the
>     variable will be used ( debugging wise not readability wise )
>     leads to more correct code, the problem is to avoid the temptation
>     to use them in other places too.
> Variables declared within a begin...end cannot be used elsewhere. 
> (E.g. for var I:=0 to .. won't let you use I after the loop).
>       AFAIK, one of Pascal's primary design goals is to won't let you
>     shoot yourself in the foot, and IMO that feature is not in that
>     direction.
>  I'd like to see an example how this is less safe.

Well one of the answer in the Cantu blog has this ( which I changed to 
lets say a "real world" relative big function ) :

var arr: array...

function Fuckup: boolean;
var I: Integer;

    <....> 20 lines of code

   for var I := Low(arr) to High(arr) do
     if arr[I]..... then

   <....> 20 lines of code

   Result := (I <= High(arr));

Dimitrios Chr. Ioannidis

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