[DAFFODIL-2040] warn on regex containing DFDL-entities syntax

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.2.0
• Component/s: Diagnostics, Front End
• Assignee: Unassigned
• Reporter: Mike Beckerle
• Created: 26/Dec/18 19:37
• Updated: 04/Feb/21 20:32

Description

An easy error for beginners is to put DFDL entities like %NL; inside a regex as for example in a dfdl:lengthPattern property value.

We should give regexs a quick scan and issue a suppressable warning if they contain anything that looks like a DFDL entity since this syntax is not supported.