A problem about DllStruct

[NewCommer]

Hello everyone,

I don't know how to describe this problem, it's generally like the picture below:

$n = 1
$t = DllStructCreate('int Test[2]')
$t.Test(1) = 123

MsgBox(0, 0, _
        $t.Test(1) & @CRLF & _
        $t.Test($n) & @CRLF & _
        $t.Test(Number($n)))

Why "$t.Test($n)" value is 0

Thank you.

[NewCommer]

Another test:

[TheXman]

The post above should answer your question.

[NewCommer]

Thank @TheXman
Instead of declaring Local, I used Enum to declare as your advice and fixed the problem.

[TheXman]

You're welcome!

[Musashi]

@TheXman 's answer solves the problem perfectly ( @NewCommer : you should mark it as solution ).

Instead of ENUM you could also use ($n+0), but this is probably not the most elegant work-around.

Local $n = 1
Local $t = DllStructCreate('int Test[2]')
ConsoleWrite("@error = " & @error & @CRLF)
$t.Test(1) = 123
$t.Test(2) = 345
MsgBox(0, 0, _
        $t.Test(1) & @CRLF & _
        $t.Test($n+0) & @CRLF & _
        $t.Test($n+1) & @CRLF & _
        $t.Test(Number($n)) & @CRLF & _
        $t.Test('1'))

 

[TheXman]

I just tried  to answer the question as to why it wasn't working as expected.  I made no suggestions as to how to resolve the problem.

For the record, in this case, I would only use an enum if naming the indexes made sense (making the code more readable and/or easier to maintain).  😉

[Nine]

This is a known bug : https://www.autoitscript.com/trac/autoit/ticket/3838