alt Hacker NewsThe visitor pattern is very common in programming language implementations. I've seen it in the Rust compiler, in the Java Compiler, in the Go compiler and in the Roslyn C# compiler. Also used extensively in JetBrains' IDEs.
What do you have against this pattern? Or what is a better alternative?
Visitor is heavy of code pattern that can be replaced by elegant, readable switch with exhaustive check, so all operations available by "Kind" enum are covered.