Re: difference between

[Benoît Minisini <benoit.minisini@xxxxxxxxxxxxxxxx>]

Le 10/10/2026 à 14:45, Jussi Lahtinen a écrit :
> Benoit, is it possible to make compiler check if boolean value is 
> compared to NULL or any other non-boolean? Or rather if operator 
> returning only boolean is checked against non-boolean?
> It would catch bugs like in this thread.
>
> Jussi

Strings and Objects are automatically converted to boolean. A void 
string and a null reference is FALSE, the others are TRUE.

As this is a feature I wanted, they are considered like booleans. Almost 
every datatype automatically converts to booleans.

I think the problem is more the 'Not' operator. Because of BASIC, there 
is no distinction like in C-like syntax between '!' (logical not) and 
'~" (binary complement).

Moreover, like valaquarus did, one forget that Not has a high priority, 
and that `If Not xxx = yyyy` is not `If Not (xxx = yyyy)`.

SO I'm not sure what kind of checks the compiler can do that would be 
reliable.

--
Benoît Minisini.