• Home
• info.hupel
• pide-2015_2.11
• 0.3.4
• source code
• document_id.scala

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

PIDE.document_id.scala Maven / Gradle / Ivy

/*  Title:      Pure/PIDE/document_id.scala
    Module:     PIDE
    Author:     Makarius

Unique identifiers for document structure.

NB: ML ticks forwards > 0, JVM ticks backwards < 0.
*/

package isabelle


object Document_ID
{
  type Generic = Long
  type Version = Generic
  type Command = Generic
  type Exec = Generic

  val none: Generic = 0
  val make = Counter.make()

  def apply(id: Generic): String = Properties.Value.Long.apply(id)
  def unapply(s: String): Option[Generic] = Properties.Value.Long.unapply(s)
}