[jira] [Assigned] (DAFFODIL-852) Implement runtime checks for lastDeclaredRequiredElement

["Michael Beckerle (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DAFFODIL-852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Beckerle reassigned DAFFODIL-852:
-----------------------------------------

    Assignee: Michael Beckerle

> Implement runtime checks for lastDeclaredRequiredElement
> --------------------------------------------------------
>
>                 Key: DAFFODIL-852
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-852
>             Project: Daffodil
>          Issue Type: New Feature
>          Components: Back End, Diagnostics
>    Affects Versions: s11
>            Reporter: Josh Adams
>            Assignee: Michael Beckerle
>            Priority: Major
>
> This is primarily an issue for cases where an element is maxOccurs="unbounded" occursCountKind="implicit", as this is only allowed on the last required element of a sequence (see DFDL-732)
> So far I believe that we have the compile time checks completed.  However, there are cases where it cannot be determined whether or not an element is required at compile time.  For example:
>  - unbounded/implicit element followed by a choice where a required element is selected at runtime (see edu.illinois.ncsa.daffodil.section14.occursCountKind.TestOCKImplicitNew test_ockImplicit12)
>  - unbounded/implicit element followed by an element where lengthKind=pattern and that pattern can match an empty string. (see edu.illinois.ncsa.daffodil.section14.occursCountKind.TestOCKImplicitNew test_ockImplicit14)



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