ios - Swift Error: Editor placeholder in source file -

hello implementing graph data structure. when try build application error "editor placeholder in source file"

the full graph implementation pulled waynebishop's github here https://github.com/waynewbishop/swiftstructures

class path {  var total: int! var destination: node var previous: path!  init(){     //error happens on next line     destination = node(key: string?, neighbors: [edge!], visited: bool, lat: double, long: double)      } } 

i changed node class around to:

public class node{  var key: string? var neighbors: [edge!] var visited: bool = false var lat: double var long: double  init(key: string?, neighbors: [edge!], visited: bool, lat: double, long: double) {     self.neighbors = [edge!]()      }  } 

this error happens 5 times throughout code have built far. question has been asked, not answered.

i think error may due changes init() in node class. prior changes init(). if is, how can add objects class? pardon me if not correct in programming terminology, relatively new oop.

you had this

destination = node(key: string?, neighbors: [edge!], visited: bool, lat: double, long: double) 

which place holder text above need insert values

class edge{  }  public class node{    var key: string?   var neighbors: [edge]   var visited: bool = false   var lat: double   var long: double    init(key: string?, neighbors: [edge], visited: bool, lat: double, long: double) {     self.neighbors = [edge]()     self.key = key     self.visited = visited     self.lat = lat     self.long = long   }  }  class path {    var total: int!   var destination: node   var previous: path!    init(){     destination = node(key: "", neighbors: [], visited: true, lat: 12.2, long: 22.2)   } }