Not the OP, but I took a survey of the /r/programminglanguages reddit, where basically everybody has to deal with the "visitor issue". https://www.reddit.com/r

Not the OP, but I took a survey of the /r/programminglanguages reddit, where basically everybody has to deal with the "visitor issue". https://www.reddit.com/r/ProgrammingLanguages/comments/7w3oeh/whats_your_experience_with_visitors/ https://www.reddit.com/r/ProgrammingLanguages/comments/7w3oe... The top comment supported the use of the visitor pattern, but I would say that MOST people in the thread did NOT use visitors. You only really need a visitor if you have more than one traversal. And even then you don't necessarily need it.