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Posted to dev@velocity.apache.org by "Michael Osipov (JIRA)" <de...@velocity.apache.org> on 2010/08/26 15:38:55 UTC
[jira] Created: (VELOCITY-774) Provide #unset directive
Provide #unset directive
------------------------
Key: VELOCITY-774
URL: https://issues.apache.org/jira/browse/VELOCITY-774
Project: Velocity
Issue Type: New Feature
Components: Engine
Affects Versions: 1.7-beta1
Reporter: Michael Osipov
Sometimes one wants to use a variable in a certain scope because the further existence might lead to errors. I declared var with #set should be unsettable. See VELOCITY-773 for a iuse case.
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[jira] Commented: (VELOCITY-774) Provide #unset directive
Posted by "Christopher Schultz (JIRA)" <de...@velocity.apache.org>.
[ https://issues.apache.org/jira/browse/VELOCITY-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910872#action_12910872 ]
Christopher Schultz commented on VELOCITY-774:
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You can also do
#set($foo = false)
...which I believe has the same effect. I use this at the bottom of loops all the time to make sure that I don't get in-loop variables bleeding-over one loop iteration into the next.
> Provide #unset directive
> ------------------------
>
> Key: VELOCITY-774
> URL: https://issues.apache.org/jira/browse/VELOCITY-774
> Project: Velocity
> Issue Type: New Feature
> Components: Engine
> Affects Versions: 1.7-beta1
> Reporter: Michael Osipov
>
> Sometimes one wants to use a variable in a certain scope because the further existence might lead to errors. I declared var with #set should be unsettable. See VELOCITY-773 for a iuse case.
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[jira] Resolved: (VELOCITY-774) Provide #unset directive
Posted by "Nathan Bubna (JIRA)" <de...@velocity.apache.org>.
[ https://issues.apache.org/jira/browse/VELOCITY-774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nathan Bubna resolved VELOCITY-774.
-----------------------------------
Resolution: Won't Fix
#set( $foo = $null )
or put your context into itself and do:
#set( $ignore = $!context.remove($foo) )
or in 1.7+ enable the particular explicit scope that you need:
macro.provide.scope.control = true
and then do:
$macro.foo = 'whatever'
and when the macro is gone, $macro.foo will be gone too.
> Provide #unset directive
> ------------------------
>
> Key: VELOCITY-774
> URL: https://issues.apache.org/jira/browse/VELOCITY-774
> Project: Velocity
> Issue Type: New Feature
> Components: Engine
> Affects Versions: 1.7-beta1
> Reporter: Michael Osipov
>
> Sometimes one wants to use a variable in a certain scope because the further existence might lead to errors. I declared var with #set should be unsettable. See VELOCITY-773 for a iuse case.
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