Iteration over a prefix with a single IP does not work

[rrb3942]

If you call ipaddr.Parse with input that is only a single IP (127.0.0.1, 127.0.0.1/32) the supplied cursor will not return any entries via Next(). Getting the value via First() works fine.

I believe Next() should return the first, and only entry, and then return nil.

I am parsing a mix of single hosts and networks both in CIDR notation and noticed that anything with a /32 prefix was being dropped because of Next() returning nil immediately.

Here is an example program to show the issue.

https://play.golang.org/p/xZEOyiLCXYN

`package main

import ( "fmt" "github.com/mikioh/ipaddr" )

func printIPs(ip string) { cursor, err := ipaddr.Parse(ip) if err != nil { fmt.Println(err) } else { fmt.Println(cursor.Pos(), cursor.First(), cursor.Last(), cursor.List()) fmt.Println("First is: ", cursor.First().IP.String()) fmt.Println("All Members:") for pos := cursor.Next(); pos != nil; pos = cursor.Next() { fmt.Println(pos.IP.String()) } } }

func main() { printIPs("192.168.168.77/32") printIPs("127.0.0.1/32") printIPs("127.0.0.0/29") } `