AST.scala

sealed trait QueryValue[A]
case class Parameter[A](value: A) extends QueryValue[A]
case class Function[A](path: Path, args: List[QueryValue[A]]) extends QueryValue[A]
case class Null[A]() extends QueryValue[A]

sealed trait QueryComparison[A]
case class QueryEqual[A](left: QueryValue[A], right: QueryValue[A]) extends QueryComparison[A]
case class QueryGreaterThan[A](left: QueryValue[A], right: QueryValue[A]) extends QueryComparison[A]
case class QueryGreaterThanOrEqual[A](left: QueryValue[A], right: QueryValue[A]) extends QueryComparison[A]
case class QueryLessThan[A](left: QueryValue[A], right: QueryValue[A]) extends QueryComparison[A]
case class QueryLessThanOrEqual[A](left: QueryValue[A], right: QueryValue[A]) extends QueryComparison[A]
case class QueryAnd[A](left: QueryComparison[A], right: QueryComparison[A]) extends QueryComparison[A]
case class QueryOr[A](left: QueryComparison[A], right: QueryComparison[A]) extends QueryComparison[A]
case class QueryIn[A](left: QueryValue[A], rights: List[QueryValue[A]]) extends QueryComparison[A]
case class QueryLit[A](value: QueryValue[A]) extends QueryComparison[A]
case class QueryNot[A](value: QueryComparison[A]) extends QueryComparison[A]
  
case class Path(p: String) extends AnyVal