[DAFFODIL-794] Warning needed if regex contains DFDL Entities

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Diagnostics, Front End, Usability
• Assignee: Unassigned
• Reporter: Mike Beckerle
• Created: 25/Jun/13 13:37
• Updated: 13/Sep/18 14:04

Description

Users will write dfdl:lengthPattern="(.+?)(?=%CR;%LF;--)"

Then wonder why it doesn't work (witness DFDL-792).

Turns out, DFDL entities aren't allowed in regular expressions, so the user has to write:

dfdl:lengthPattern="(.+?)(?=\r\n--)"

We should examine properties that are supposed to be regex, and warn if they contain things that look like DFDL entities.