Parsing of Field Grouping not working

[JanCejka]

Problem

• Parsing of Field Grouping throws error
• Error is thrown as well in case of +/- prefix and missing field name
• All examples below parse correctly with Java Lucene parser
• Syntax is in line with:
  • Description of Field Grouping
  • BNF of Lucene QueryParser
• Fixing this would:
  • Increase compatibility with Lucene
  • Provide alternative for providing list of values in format a:(b OR c OR d) or a:(b c d) (later in case of possibility to change default operator to OR)

Example of failing searches

• +(a b)
• -(a b)
• c:(a b)
• +c:(a b)
• -c:(a b)

Versions
3.5.0 - on https://npm.runkit.com/liqe
3.6.0 - with Angular 14.0.4

Demonstration

https://runkit.com/embed/msogu7iiwefg

[gajus]

PRs welcome