return from macros

[ro...@yahoo.com]

hi,

is there the possebility
to have a return from macros?

actually there is but is there a more
programmerlike way. at the moment 
i am doing this.

>>> def
#macro( Foo $Input $Result)
    #set ($Result = "BAR")
#end

>>>call
# set ($result = "")
#Foo("Someinput" $result)

ciao robertj
------------------------------------------------------------
Robert Kuzelj  
Gaissacherstrasse 7           email: robert_kuzelj@yahoo.com
81371 Muenchen                tel:   0177/5302230

the trinity of desirables of (software) architecture:
Firmitas, Utilitas, Venustas (marcus vitruvius 20 BC)
strength, utility, beauty



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Re: return from macros

["Geir Magnusson Jr." <ge...@optonline.net>]

On 5/16/02 3:46 AM, "robert_kuzelj@yahoo.com" <ro...@yahoo.com>
wrote:

> hi,
> 
> is there the possebility
> to have a return from macros?
> 
> actually there is but is there a more
> programmerlike way. at the moment
> i am doing this.
> 
>>>> def
> #macro( Foo $Input $Result)
>   #set ($Result = "BAR")
> #end
> 
>>>> call
> # set ($result = "")
> #Foo("Someinput" $result)
> 

The point of VMs was not to be a programmatic subroutine that can return
values, but really a way of putting a name on, and parameterizing a bit of
VTL.

That said, there is one trick you can use :

#macro(Foo $input)
<image src="$input">
#end

Then

 #set($imgmarkup = "#Foo('cloud.jpg')")

Which will set $imgmarkup to '<image src="cloud.jpg">'

This works because "" will 'render' it's contents.

I'll be the first to admit this is far from a real return, but you can use
it effectively in certain situations.

geir

-- 
Geir Magnusson Jr.
Research & Development, Adeptra Inc.
geirm@adeptra.com
+1-203-247-1713



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