Wxme Converter

DON'T USE YET. UNDERCONSTRUCTION

The DrRacket editor lets you put non-plain-text elements in your code. Look at this funny program. It contains fractions, comment boxes, and a smiley face.

Racket files with non-plain-text elements are save in WXME format. Here's some information about WXME:

• http://docs.racket-lang.org/gui/editor-overview.html?q=comment%20boxes#%28part._editorfileformat%29
• http://docs.racket-lang.org/gui/WXME_Decoding.html

RST does not accept WXME files. So if a student puts an improper fraction in his program, he will get zero on the auto-test.

Attached below is a script that will convert non-plain-text files to plain-text files. RST can then process the plain-text files.

To use this script, run it from the terminal. It accepts one argument: the file to convert. The output is printed to the screen.

racket wxme_converter.rkt file_to_convert.rkt

You can save the output to a file:

racket wxme_converter.rkt file_to_convert.rkt > plaintext.rkt

If you use this script on the above program, the output will be:

;; The first three lines of this file were inserted by DrRacket. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-beginner-abbr-reader.ss" "lang")((modname test-file) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
;; Numbers that are actually pictures.
;; They are all converted to improper fractions.
95/2
5/3
5/3
5/3

"Image removed by tutor."

;; f(x) = x + 5 + pi
;; Numbers are converted to improper fractions,
;; so definition of f is unchanged!
(define (f x)
  (+ x 5/3 5/3 5/3 #i3.141592653589793))

(define (g x)
  (+ x 0.111111111111111111111111))
 


(define cardsuits " ♦ ♠ ♣ ♥ ")
(define contract-arrow "→")
(define examples-arrow "⇒")

(string-length "Oops too many brackets")))

;; Hello world! This is my pretty comment
;; box. Here are the instructors with no space between pictures
;; 
 

(identity "end of file")

Fractions, repeating decimals, and comment boxes are converted properly. Pictures are replaced with the string "Image removed by tutor."

If this script consumes a file that's already plain-text, it will just echo back the contents of the file.