[JEXL-12] [JEXL] Implement short-circuit boolean evaluation

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.0

Environment

Operating System: All
Platform: All

• Bugzilla Id: 29550
• Assignee: Unassigned
• Reporter: Matthew Firth
• Created: 14/Jun/04 15:36
• Updated: 09/Mar/10 15:25
• Resolved: 09/Mar/10 15:25

Description

The current implementation of ASTAndNode and ASTOrNode will evaluation both
sides of an expression before returning a result. I think most developers
these days seem to expect the RHS of an AND/OR expression to be ignored if the
LHS is sufficient to determine the result
(e.g. if A=>true, "A or B"=>true, regardless of B).

The patches appear to be trivial - if a committer is interested & thinks it
worthwhile I'll create them.

(btw, the old Turbo Pascal compiler described this optimisation as "short
circuit boolean evaluation"; I'm not sure if that is a common name for it.)