[jexl] Contribution on ASTAssignment and ASTStatementExpression

• Key: JEXL-4
• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Priority: Major
• Assignee: Unassigned
• Reporter: Barry Lagerweij
• Affects Version/s: 1.0

Environment

Operating System: other
Platform: Other

Description

I've successfully used JEXL in a project I'm working on at the moment. We
needed a flexible rule engine, with simple but powerful expressions, and
JEXL proofed to be just that.

There was one minor flaw in JEXL: It support expressions, but does not
support assignments.

For example, the following expression did not work:

a = 1+2;

(Although the grammar is ready for it...)

I've attached a cvs diff, with my additions to ASTAssignment,
ASTStatementExpression and ASTReferenceExpression. Mostly, my changes
involve implementing the 'value' method. ASTAssignment now actually tries to
assign a value to a reference variable.

It is possible that I've misinterpreted the evaluation/visitor pattern, but
the changes worked for me.

I hope that you'll find my additions of any use.

With kind regards,

Barry