What does (staged) mean?

[A-childs-encyclopedia]

I noticed that both scala and racket have this

[gavr123456789]

ping @nuald

[nuald]

There is a good explanation here: https://cs.stackexchange.com/a/2914 in short, the program is executed in 2+ stages:

1. Code generation
2. Operate on data using the generated code.

It's not the reference implementations, and rather included just for testing purposes. However, if your programming language supports it, you may want to take advantage of it.