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https://issues.apache.org/jira/browse/FREEMARKER-21?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15863067#comment-15863067
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Daniel Dekany commented on FREEMARKER-21:
-----------------------------------------
Sure, `as` doesn't clash with the `#list` syntax in the technical sense, but it
looks too confusing for humans (and adds some extra challenge for tool authors
perhaps).
The variable assignment doesn't work because it's illegal to assign a missing
value to a variable. (Even if you still did it somehow, the variable itself
would have a "missing value", so FreeMarker would fall back to look for in
enclosing scopes.)
As of the original feature request, the specific use case shown is probably
typical enough in templates to deserve some terser solution. What's the best
solution for it is a question though...
> Reference to the object in condition - avoid repeating the same in #if and
> ${...}
> ---------------------------------------------------------------------------------
>
> Key: FREEMARKER-21
> URL: https://issues.apache.org/jira/browse/FREEMARKER-21
> Project: Apache Freemarker
> Issue Type: New Feature
> Components: engine
> Reporter: Ondra Žižka
>
> Repeating stuff is annoying, especially in programming.
> Therefore this is annoying:
> {code}
> <#if someVariable.someMethod.someProperty??>
> <div>${someVariable.someMethod.someProperty}</div>
> </#if>
> {code}
> This would be better:
> {code}
> <#if someVariable.someMethod.someProperty?? as value>
> <div>${value}</div>
> </#if>
> {code}
> Not talking about the fact that it could only be evaluated once.
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