[racket] Namespaces - GCable?

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Sat Feb 9 20:03:01 EST 2013

Sure, they are collected. This returns #f when I run it for the last result.

#lang racket
(define TMP (make-base-namespace))
(define wb (make-weak-box TMP))
(parameterize ([current-namespace TMP])
  (namespace-require 'racket)
  (eval '(length (list 1 2 3))))
(set! TMP #f)
(weak-box-value wb)

On Sat, Feb 9, 2013 at 6:50 PM, Ray Racine <ray.racine at gmail.com> wrote:

> The API is pretty flexible about creating and loading modules into
> namespaces.  What is not apparent is how to evict a namespace or the
> GC-ableness of a namespace.
> In the REPL, topleve.
> Say I in a scope of code, I create a base namespace I'll call TMP, load or
> attach modules into it, switch to it via current-namespace.
> Now say I switch the current-namespace to some other namespace, maybe the
> original I saved before I created TMP.  At the top-level, to me, there is
> no reference to TMP.  Will TMP be GC'd?  Or is there away to explicitly
> "purge" an unused namespace?
> Thanks,
> Ray
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>   Racket Users list:
>   http://lists.racket-lang.org/users
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