Extensible syntax programming languages - How Old Today?

1

Rocq

2

Armed_Bear_Common_Lisp

2

IMP_(programming_language)

2

OCaml

2

Racket_(programming_language)

2

Scheme_(programming_language)

7

ATS_(programming_language)

7

Clojure

7

Common_Lisp

7

Dylan_(programming_language)

7

Lisp_(programming_language)

7

Red_(programming_language)