[LUCY-140] Space-padded +/- has semantic impact in QueryParser

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.1.0 (incubating)
• Component/s: Search
• Assignee: Marvin Humphrey
• Reporter: Marvin Humphrey
• Created: 01/Apr/11 00:24
• Updated: 04/May/11 04:19
• Resolved: 04/May/11 04:19

Description

In Lucy's QueryParser syntax, plus and minus symbols, used to require or
forbid terms/subqueries, should only apply if they are directly prepended.
Right now, a bug in QueryParser.c causes them to apply when there is
whitespace separation.

These two query strings produce identical results, but should not:

    a - b
    a -b