[solved] Going 'yes, I know' to warnings about unintialised variables

[RememberTP]

I've looked in the Programmer's Guide and the Language Reference Guide without success - is there a way to tell the compiler that you know a particular variable isn't initialised, so please don't issue a warning about it?

Hopefully this sample shows what I'm talking about: I'd like not to be warned about the way a is not initialised every compile...

Code: Pascal  [Select][+][-]

1. procedure setItUp (var x: integer);
2. begin
3.   x := 1;
4. end;
5.  
6. procedure useIt;
7. var
8.   a: integer;
9. begin
10.   setItUp (a);
11.   writeLn (a);
12. end;

[dsiders]

I've looked in the Programmer's Guide and the Language Reference Guide without success - is there a way to tell the compiler that you know a particular variable isn't initialised, so please don't issue a warning about it?

Hopefully this sample shows what I'm talking about: I'd like not to be warned about the way a is not initialised every compile...

Code: Pascal  [Select][+][-]

1. procedure setItUp (var x: integer);
2. begin
3.   x := 1;
4. end;
5.  
6. procedure useIt;
7. var
8.   a: integer;
9. begin
10.   setItUp (a);
11.   writeLn (a);
12. end;

Turn warning 5036 off (per unit):

https://wiki.freepascal.org/$warn

[cdbc]

Hi
Just as @dsiders says, turnit off...
In the gutter, where the blue dots, hints & warnings show an icon, you right-click on the icon and choose at the top of the popup-menu e.g.: 5036
You usually get 3 choices: insert a {%H-} in the code, insert a {$warn 5036 off} in the unit or hide via project option.
Per unit is the middle one, as per the attached screenshot...
HTH
Regards Benny

[jamie]

use an OUT instead of a VAR

[440bx]

use an OUT instead of a VAR

and for the OP's problem, that is the correct solution.

[Thaddy]

In this case, yes, that fixes it.
More in general, though, you can turn of warnings on block level, not unit level.
That prevents you from turning off a specific warning for a whole unit, That is also in the wiki. After all, it can be a situation where the warning would be correct and you overlooked it.
If you know the variable is initialized, use it only in the block that triggers the warning.

[RememberTP]

use an OUT instead of a VAR

Ah ha, fabulous - thank you.

I stopped using Delphi around version 3 and I can't remember noticing that it had introduced this.