searchforwards(predicate)

 /**
    *
    * Search Forwards.  This generalises the character version of find forwards
    *
    * The user provides a predicate to specify the search condition.
    *
    * This operation does not change any variable other than the cursor position.
    *
    */

  def sf( p: Char => Boolean ): Boolean = {

    /*    def currentPos( pos: Int ): Option[Int] = {
          if ( pos >= end ) None
          else if ( p( buffer( pos ) ) ) {
            cursor = pos
            Some( pos )
          }
          else currentPos( pos + 1 )
        }

        currentPos( 0 )

        buffer.find( p ) match {
          case Some( _ ) => true
          case None => false
        }*/

    /*    var b =false
        for (i <- cursor until end if !b) {
          if (p(buffer(i))) {
            cursor = i
            b = true
          }
        }
        b*/

    var c = false
    ( cursor until end ) collectFirst { case i if p( buffer( i ) ) => cursor = i; c = true }
    c