Why enter/run a submodule in the REPL?

Stephen De Gabrielle <[email protected]> Wed, 12 Dec 2018 00:21:36 +0000

Newsgroups	gmane.comp.lang.racket.user,gmane.lisp.scheme.plt
Message-ID	<CAGHj7-L5h=2RTUimPnpMrARj_KHv6v5XzgOQjAPDV43ChD0TPQ@mail.gmail.com>

Hi,

#lang racket
(displayln "This is the main module")
(module+ drracket
  (define foo 'FOO)
  (displayln "This is the drracket submodule"))

Execute and DrRacket displays "This is the main module" in the interactions
window
type
(require (only-in racket/enter dynamic-enter!)
  (only-in syntax/location quote-module-path))
(dynamic-enter! (quote-module-path drracket))

and bindings defined in the submodule are then available; e.g.
> foo
'FOO

Why and how do I use this for interactive development, scripting and
debugging?

There is also a DrRacket function (Submodules to Run), but I can't find any
documentation for it.

Stephen

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