Search query parser library

The library helps to parse search queries (e.g. custom search boxes) and enables custom search index implementations.

Supported expressions:

• (Implicit) boolean AND: a AND b or a b
• boolean OR: a OR b OR c
• boolean NOT: -a or NOT a
• group query: (a b) OR (c d)
• text match: abc or "words in close proximity"
• range query: [1 TO 20] (inclusive), ]aaa TO dzz[ (exclusive), or [1 TO 20[ (mixed)
• scopes: field:(a b) or field:abc
• field comparison: year < 2000

Usage

A simple usage example:

import 'package:query/query.dart';

main() {
  final q = parseQuery('some text OR field:another');
  // prints "(some (text OR field:another))"
  print(q);
}