Au3Check - warning about ununsed vars

[kara2004]

Hi,

a question about Au3Check-warnings:

I've enabled " -w 5" (local var declared but not used) and during compilation I get two warnings:

 

>Running AU3Check (3.3.15.1)  params:-w 3 -w 4 -w 5  from:C:\Program Files (x86)\AutoIt3  input:E:\AutoIT_src\webSiteUpdater_stripped.au3
"E:\AutoIT_src\webSiteUpdater_stripped.au3"(4684,56) : warning: $ex: declared, but not used in func.
Local $intFileIndex, $strFileIndex, $bEnabled, $ec, $ex,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
"E:\AutoIT_src\webSiteUpdater_stripped.au3"(5470,13) : warning: $arrIn: declared, but not used in func.
Local $arrIn,
~~~~~~~~~~~~^
E:\AutoIT_src\webSiteUpdater_stripped.au3 - 0 error(s), 2 warning(s)
->19:12:06 AU3Check ended. Press F4 to jump to next error.rc:1

The referenced funcions are:

Func _processSection($strSection, $bForce = False)
    ...
    Local $intFileIndex, $strFileIndex, $bEnabled, $ec, $ex, $hInetGet, $arrInetInfo, $intPercent, $bDwnlOK, $strUrlPattern, $intUrlIndex
    ...
        $ec = 0
        $ex = 0

        $ret = StringRegExp($strOutFile, $strUpdatePattern, $intRegExpType)
        $ec = @error
        $ex = @extended
    ...
EndFunc

Func _sortSections()
    Local $arrIn, $strTemp, $arrSorted, $arrOut[1], $i, $j, $arrCurSect, $intRet, $strColSep
    ...
    $arrIn = FileReadToArray($strIniFile)
    ...
EndFunc

Is this a problem of AU3check or a problem in coding? It doesn't affect the compiling, the exe is running, but the warning is a litte bit confusing - I think, both vars are used in the code!?

Thank you very much

kara

 

[Jos]

$ex it's value is nowhere used in the func, but you only set it's value, so the variable is unused....right?
To use a variable, you need to have it on the right side of the = in a formula ($x = $ex)  or in any function  ($x=func($ex)).

Jos

Edited May 11, 2020 by Jos

[Guest]

Hmm, in your code snippet the local variable $ex is declared and a value is assigned to it. The warning: $ex: declared, but not used in func. should not show up.

My fault. The warning is correct, because assigning a value is not the same as 'in use' of course. I guess I was a little unfocused

 

Local ..., $ex, ...
    $ex = 0
    
    ; USE IT :
    ConsoleWrite($ex & @CRLF)

45 minutes ago, kara2004 said:

It doesn't affect the compiling, the exe is running

That's why it's called a warning, not an error .

Edited May 11, 2020 by Musashi

[jchd]

That's it: a variable is only used when it's part of a RHS (Right Hand Side) of an assignment or of a function invokation.

It's like you write down a phone number and then discard that note.  The number was not used.  On the contrary, if you pass the note to a friend, you can regard that as a use: you've passed that information outside your environment.

[kara2004]

Just a misunderstanding of "using variables": $ex was set, but instead of using it, I used @extended a few lines later and $arrIn was just used for counting the lines (via @extended - same as _FileCountLines)

Correctded the code and the warnings are gone...

Thanks to all for your responses