Re: 2.14pre1 null values as default parameter of macro

Hi,

Just offhand, I think you should be able to specify null as the
default parameter for a macro. So, this must be a bug in the 2.4pre1
release.

However, I just checked this against the latest code from SVN and it
seems to work as you want it to work. For example, the following
template:
---
[#macro foo bar=null]
   [#if bar?is_null] baz [/#if]
[/#macro]

[@foo/]
---

outputs:

   baz

So, basically, if you just do:

  svn co https://freemarker.svn.sourceforge.net/svnroot/freemarker/trunk/freemarker
  co freemarker
  ant
from the command line, you will have a freemarker.jar that behaves as you want.

JR

On Tue, Dec 23, 2008 at 7:50 PM, Florian Falkner
<[email protected]> wrote:
> Hello!
>
> We're are running an application with an ancient prerelease of freemarker 2.4 (namely freemarker2.4.0_090807svn.jar). So far it really works well.
>
> Today I tried to upgrade the application to freemarker-2.4pre1.jar and now the following construct doesn't work anymore:
>
> [#macro mainLayout layout=null]
>        <!--html here -->
>        [#if layout??]
>                ${layout}
>        [/#if]
>        <!--html also here-->
> [/#macro]
>
> Exception is:
>
> freemarker.core.InvalidReferenceException: Expression null is undefined on line 71, column 27 in ilbi/admin/admin.ftl.
>        at freemarker.core.helpers.DefaultReferenceChecker.assertNonNull(DefaultReferenceChecker.java:18)
>
> Is this the desired behaviour for 2.4? If so I'll update my parameter specifications.
>
> thanks,
> Florian
>
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