stackerizer-mb macro flatten arity mismatch about beautiful-racket HOT 3 CLOSED

What is the specific input that’s causing the arity-mismatch error?

from beautiful-racket.

@mbutterick any input file with more than one expression. I had to do this same fix but I did mine slightly different:

(define-macro (stackerizer-mb EXPR ...)
  #'(#%module-begin
     (begin (printf ";; ~a~n" EXPR)
            (for-each displayln (reverse (flatten EXPR)))
            (newline)) ...))

(this also made the output more readable for me)

Here's my repro:

#lang s-exp "stackerizer.rkt"
(+ 5 4 3 2 1)
(+ 1 (+ 2 (+ 3 (+ 4 5))))
(* 1 2 (+ 3 4 (* 5 6 (+ 7 8 (* 9 10)))))

from beautiful-racket.

I see your point, but stackerizer makes a program for stacker, which in turn represents a single expression. Therefore, it only makes sense that stackerizer be restricted to one expression. I will adjust the tutorial to make this ground rule clearer.

from beautiful-racket.