Lookarounds

[BeckySharp]

Add info about lookarounds to the documentation, with examples.

[BeckySharp]

odinson/core/src/main/scala/ai/lum/odinson/compiler/QueryParser.scala

Lines 363 to 373 in 5d85c6b

	def lookaround[_: P]: P[Ast.Assertion] = {
	P(StringIn("(?=", "(?!", "(?<=", "(?<!").! ~ disjunctivePattern ~ ")").map {
	// format: off
	case ("(?=", pattern) => Ast.PositiveLookaheadAssertion(pattern)
	case ("(?!", pattern) => Ast.NegativeLookaheadAssertion(pattern)
	case ("(?<=", pattern) => Ast.PositiveLookbehindAssertion(pattern)
	case ("(?<!", pattern) => Ast.NegativeLookbehindAssertion(pattern)
	// format: on
	case _ => ???
	}
	}