I've also grown to love s-expressions, but even Common Lisp deviates from pure s-expressions in places ( #( ... ) array syntax, for example), and the mechanism

I've also grown to love s-expressions, but even Common Lisp deviates from pure s-expressions in places ( #( ... ) array syntax, for example), and the mechanism is customizable via reader macros. Some examples: https://gist.github.com/chaitanyagupta/9324402 https://gist.github.com/chaitanyagupta/9324402 https://lisp-lang.org/wiki/article/reader-macros https://lisp-lang.org/wiki/article/reader-macros