I'm seeing an inconsistency in the behavior of submodules that looks like a bug in DrRacket (as opposed to Racket).
First, though, it looks like running a module in DrRacket runs *both* the main and test submodules, if they both exist. I don't think this behavior is documented; I see this text: "When a module is provided as a program name to the racket executable or run directly within DrRacket, if the module has a main submodule, the main submodule is run after its enclosing module." … but no similar mention of 'test'. So I'm guessing that's just a doc bug? The bigger issue, though, arises when I have a file containing both 'test' and 'main' submodules. It appears to me that I can't require the 'main' module externally when the modules are stored in separate files, but that I can when e.g. using #lang racket/load. So, this program: #lang racket/load (module foo racket (define (g) (printf "abc\n")) (define (h) (printf "def\n")) (module+ test (g)) (module+ main (h)) ) (module bar racket (require (submod 'foo main))) (require 'bar) … produces output "def", as I'd expect, but splitting it into two files: foo.rkt: #lang racket (define (g) (printf "abc\n")) (define (h) (printf "def\n")) (module+ test (g)) (module+ main (h)) bar.rkt: #lang racket (require (submod "foo.rkt" main)) … and running "bar.rkt" *in DrRacket* produces this message: require: unknown module: (submod "/private/tmp/foo.rkt" main) Running it from the command line, though, does what I'd expect: pcp069222pcs:/tmp clements$ racket ./bar.rkt def So it looks like DrRacket's not doing quite the right thing here. Apologies if this has been fixed since 5.3.0.2--2012-04-20(873c1bc/g) [3m]. John
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