src/Pure/General/properties.scala
author wenzelm
Tue, 18 Oct 2016 17:41:56 +0200
changeset 64307 c4d16f35c6e7
parent 63805 c272680df665
child 64358 15c90b744481
permissions -rw-r--r--
replaced inefficient valid_accesses by is_valid_access, based on stored input accesses: e.g. relevant for Proof_Context.update_thms;

/*  Title:      Pure/General/properties.scala
    Module:     PIDE
    Author:     Makarius

Property lists.
*/

package isabelle


object Properties
{
  /* named entries */

  type Entry = (java.lang.String, java.lang.String)
  type T = List[Entry]

  class String(val name: java.lang.String)
  {
    def apply(value: java.lang.String): T = List((name, value))
    def unapply(props: T): Option[java.lang.String] =
      props.find(_._1 == name).map(_._2)
  }

  class Boolean(val name: java.lang.String)
  {
    def apply(value: scala.Boolean): T = List((name, Value.Boolean(value)))
    def unapply(props: T): Option[scala.Boolean] =
      props.find(_._1 == name) match {
        case None => None
        case Some((_, value)) => Value.Boolean.unapply(value)
      }
  }

  class Int(val name: java.lang.String)
  {
    def apply(value: scala.Int): T = List((name, Value.Int(value)))
    def unapply(props: T): Option[scala.Int] =
      props.find(_._1 == name) match {
        case None => None
        case Some((_, value)) => Value.Int.unapply(value)
      }
  }

  class Long(val name: java.lang.String)
  {
    def apply(value: scala.Long): T = List((name, Value.Long(value)))
    def unapply(props: T): Option[scala.Long] =
      props.find(_._1 == name) match {
        case None => None
        case Some((_, value)) => Value.Long.unapply(value)
      }
  }

  class Double(val name: java.lang.String)
  {
    def apply(value: scala.Double): T = List((name, Value.Double(value)))
    def unapply(props: T): Option[scala.Double] =
      props.find(_._1 == name) match {
        case None => None
        case Some((_, value)) => Value.Double.unapply(value)
      }
  }
}