I'm having trouble with loading the code for the Berkeley Scheme course Simply Scheme, specifically
this code. I've tested it in many different versions of Scheme. In Chicken, I get this error:
#;1> (load "simply.scm")
; loading simply.scm ...
Error: (symbol->string) bad argument type - not a symbol: #<procedure (? wd)>
Call history:
<syntax> (##core#if (empty? x) (##core#begin (whoops "Invalid argument to FIRST: " x)) (##core#if (word? x) (......
<syntax> (empty? x)
<syntax> (##core#begin (whoops "Invalid argument to FIRST: " x))
<syntax> (whoops "Invalid argument to FIRST: " x)
<syntax> (##core#if (word? x) (##core#begin (word-first x)) (##core#begin (whoops "Invalid argument to FIRST:...
<syntax> (word? x)
<syntax> (##core#begin (word-first x))
<syntax> (word-first x)
<syntax> (##core#begin (whoops "Invalid argument to FIRST: " x))
<syntax> (whoops "Invalid argument to FIRST: " x)
<syntax> (##core#undefined)
<syntax> (word->string word->string)
<eval> (word->string word->string)
<eval> (string? wd)
<eval> (number? wd)
<eval> (symbol->string wd) <--
Just for comparison, Racket gives this error:
Welcome to Racket v6.3.
> (load "simply.scm")
simply.scm:20:12: set!: cannot mutate module-required identifier
in: number->string
context...:
/home/hercynian/racket/collects/racket/private/misc.rkt:87:7
. . . which doesn't seem to be the same thing. This is beyond my rank beginner skills to fathom. Any ideas what's wrong with simply.scm?
LB