[jira] [Updated] (TAP5-1615) Add not null check expression syntax

["Jochen Kemnade (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jochen Kemnade updated TAP5-1615:
---------------------------------


This issue has been last updated about 1.5 years ago and has no information about the versions that are affected. That makes it hard to determine whether it is still relevant.
If the issue still persists with the current stable version (5.3.7) or the most recent development preview of Tapestry (5.4-beta-6), both of which are available from Maven Central, please update it as soon as possible, adding the respective version(s) to the issue's "Affects Version/s".

> Add not null check expression syntax
> ------------------------------------
>
>                 Key: TAP5-1615
>                 URL: https://issues.apache.org/jira/browse/TAP5-1615
>             Project: Tapestry 5
>          Issue Type: New Feature
>          Components: tapestry-core
>            Reporter: Denis Stepanov
>            Priority: Minor
>         Attachments: tapestry-notnull.patch
>
>
> New sytax will allow to check if expression result is not null
> value="prop?" - returns true if "prop" is not null
> value="prop.a.b.c?"  returns true if "c" is not null
> value="prop?.a?.b?.c?" returns true if "c" is not null
> value="m()?" returns true if result of the method "m" is not null



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