[stringtemplate-interest] How to use variables inside format modifiers

[Mohamed Mansour]

Hello,
I have been using StringTemplate to produce stylized report files. Some
variables need to be formatted someway, for example if I want to uppercase a
variable I do, therefore I setup an attribute renderer:
$foo;format="uppercase"$

In my specific case I would need to apply more than one formatter (more than
one attribute renderer for a variable), so I created many attribute renders
and I can process them like:
$foo;format="uppercase|fixedlength:10:x:R|lowercase"$ If you notice a
modifer could have parameters ( with colons as seen with fixedlength)

So if $foo is "123aBc" it will return "XXXX123abc", the above works
perfectly fine

My main problem is that, some parameters in my format modifiers need to be
ST variables, for example, I would need to add a number:
$numA;format="calculate:+:$numB$"$

If numA = 10, and numB = 5, the formatter will return15. But my problem is
that, it treats the variables as a string doesn't actually give me the exact
value of the variable.

How can I pass variables in the "format" area?

Thanks!

-- Mohamed Mansour
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