Meta-circular evaluation and immutability

Is it possible to write meta-circular evaluator without mutable data structures?

>>5
If you're a kike and you know it, sage your posts (sage sage)
If you're a kike and you know it, sage your posts (sage sage)
If you're a kike and you know it, then your post will surely show it
If you're a kike and you know it, sage your posts. (sage sage)