Re: weird macro params issue

The order of populating defaulted variables is undefined -- they're  
being pulled out by an iterator out of a hash map. So if this worked  
for you, then you just had blind luck so far, I'm afraid. That's  
something we could maybe enforce going forward...

Attila.

On 2008.05.02., at 10:58, John Cherouvim wrote:

> Hello
>
> I have this macro:
> <#macro test a b=a c=b>
>    ${a} - ${b} - ${c}
> </#macro>
>
> And this client code:
> <@test 1 /><br/>
> <@test 1 2 /><br/>
> <@test 1 2 3 /><br/>
>
> Which produces:
> 1 - 1 - 1
> 1 - 2 - 2
> 1 - 2 - 3
>
> Now if I just change the param names of the macro:
> <#macro test foo bar=foo baz=bar>
>    ${foo} - ${bar} - ${baz}
> </#macro>
>
> And keep the same client code, then the output produced is:
> InvalidReferenceException: Expression bar is undefined on line 20,
> column 31 in index.ftl.
> 1 - 2 - 2
> 1 - 2 - 3
>
> The first call fails when it tries to evaluate the baz=bar. Why is  
> that?
>
> Also, is this usage valid in freemarker? To have parameters default to
> the value of other parameters. I find it very useful for some use  
> cases.
>
> thanks,
> Ioannis
>
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Attila.

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