"Cannot make existing variables static."

[Relive]

This is the error message I got: "Cannot make existing variables static."

I'm trying to use static variable as a means to iterate a section of my script. 

Original

while 1
    global $initial, $constant
    $x = $initial + ($constant * SomeFunc())
    msgbox(0, '', $x)
wend

func SomeFunc()
    global static $counter = -1
    $counter += 1
endfunc

Edit1

while 1
    global $initial, $constant = 1
    $x = $initial + ($constant * SomeFunc())
    msgbox(0, '', $x)
wend

func SomeFunc()
    global static $counter = -1
    $counter += 1
    return $counter
endfunc

 

Edited November 14, 2015 by Relive

[JohnOne]

You are trying to redeclare a global static variable.

Apart from that not making much sense, I expect it's not allowed.

What else makes no sense is your mathematical operations involving 3 variables all of which are 0 and a function return which is also 0.

[Relive]

You are trying to redeclare a global static variable.

Apart from that not making much sense, I expect it's not allowed.

What else makes no sense is your mathematical operations involving 3 variables all of which are 0 and a function return which is also 0.

So if I wrote local static variable, it works... It doesn't make any more sense than declaring global. Also, let $constant = 1, and attempt return $counter (in global please).

Edited November 14, 2015 by Relive

[BrewManNH]

A global static is pointless.

Plus, don't declare your variables inside a loop, it's a performance drain to do that, and never declare global variables inside a function.