Numeric modifier parameters

I just created a simple modifier "scale_number" which I use thus:
    {$data|scale_number:4:-10:20:50}

The idea was to scale a value between 4 and 20 to one between -10 and 50.

In doing so I discover that this fools Smarty (2.6.0) because of the - sign.
I suspect it is being seen as a calculation:
    ($data|scale_number:4:) - (10:20:50)

Is this behaviour correct/desirable? I got a bit lost trying to see how it
would be fixed - guess I don't know the compiler well enough.

It is possible to work around this with
    {$data|scale_number:4:"-10":20:50}
.. but this is not intuitive.

Note that "." also fools Smarty in a similar way:
    {$data|scale_number:4:10.5:20:50}

-- 
Mark Rogers,
More Solutions Ltd

-- 
Smarty Development Mailing List (http://smarty.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php