gapt.proofs.context.facet.Definitions.scala Maven / Gradle / Ivy

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General Architecture for Proof Theory

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package gapt.proofs.context.facet

import gapt.expr.Expr
import gapt.proofs.context.update.Definition

/** Definitions that define a constant by an expression of the same type. */
case class Definitions(definitions: Map[String, Expr]) {
  def +(defn: Definition) = {
    require(!definitions.contains(defn.what.name))
    copy(definitions + (defn.what.name -> defn.by))
  }

  override def toString = definitions.toSeq.sortBy(_._1).map { case (w, b) => s"$w -> $b" }.mkString("\n")

  def filter(p: ((String, Expr)) => Boolean): Definitions =
    copy(definitions.filter(p))
}
object Definitions {
  implicit val defsFacet: Facet[Definitions] = Facet(Definitions(Map()))
}