The following macro is a variant of peek that mimics Python's = format specifier (e.g. print(f"{a=} {a+b=}")) by printing expressions and the values they evaluate to.
(define-syntax-rule (db arg ...) (begin (let ((evaluated-arg arg))(format (current-error-port) ";;; ~s => ~s\n" (quote arg) evaluated-arg)
evaluated-arg) ...)) Am I reinventing the wheel? Does anyone see value in this being added to Guile? Thanks, Jean