gapt.proofs.lk.rules.InitialSequent.scala Maven / Gradle / Ivy

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General Architecture for Proof Theory

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package gapt.proofs.lk.rules

import gapt.proofs.HOLSequent
import gapt.proofs.SequentIndex
import gapt.proofs.lk.LKProof

/**
 * An LKProof consisting of a single sequent:
 *  *     --------ax
 *      Γ :- Δ
 * 
 */
abstract class InitialSequent extends LKProof {

  override def mainIndices: Vector[SequentIndex] = endSequent.indices

  override def auxIndices: Seq[Nothing] = Seq()

  override def immediateSubProofs: Seq[Nothing] = Seq()

  override def occConnectors: Seq[Nothing] = Seq()
}

object InitialSequent {
  def unapply(proof: InitialSequent): Some[HOLSequent] = Some(proof.endSequent)
}