Re: Transient environment with standard functions

[Basa Centro <basa.centro@gmail.com>]

Matt and List,

As a matter of fact, I've been thinking about defecting to MIT/GNU
Scheme if I don't get better support for scmutils and C++ FFI. :)

Come on now Guilers, we can't have people defecting to Racket.

Is there equivalent functionality in Guile to Racket's
make-base-namespace, as Matt needs?  It does seem like Guile's module
system should handle this.

Let's help Matt.  Esprit de Guile!

(Basa)

On 6/10/16, Matthew Keeter <matt.j.keeter@gmail.com> wrote:
> Thanks for the reply!
>
> You’ll be sad to hear that I’ve solved the problem by switching to Racket –
> (make-base-namespace) creates the kind of temporary environment I needed,
> and multiple calls produce multiple independent namespaces.
>
> -Matt
>
> On Jun 10, 2016, at 2:18 PM, Basa Centro <basa.centro@gmail.com> wrote:
>
>> Hi Matthew,
>>
>> [I know this reply is a little delayed.  Please let us know how you
>> did it if you have already solved the problem.]
>>
>> Are you using eval-string?
>>
>> https://www.gnu.org/software/guile/manual/html_node/Fly-Evaluation.html#Fly-Evaluation
>>
>> It might help for you to post a minimal code sample of what "almost
>> works" and point out what doesn't.  Also, there may be a simpler
>> technique for what you are trying to accomplish--can you backtrack us
>> to a higher level motivation?  It seems like you need a read-only
>> environment with a read/write one added on.
>>
>> (Basa)
>>
>>
>> On 5/28/16, Matthew Keeter <matt.j.keeter@gmail.com> wrote:
>>> I’m trying to generate a temporary, transient environment that a useful
>>> set
>>> of functions in it.
>>>
>>> The use case is eval’ing a set of small code strings.  Each environment
>>> needs to be
>>> independent, so previous eval’s don’t leave anything in the environment.
>>>
>>> I can make a dummy environment with (null-environment 5), but it’s
>>> missing
>>> everything
>>> useful.  Calling (scheme-report-environment 5) gives me a useful
>>> environment, but the
>>> environment is shared (so effects from one eval can carry over, which is
>>> undesirable).
>>>
>>> Any pointers?  (resolve-module) seems like it could be useful, but the
>>> #:version argument
>>> doesn’t seem to work.
>>>
>>> Thanks,
>>> Matt
>>>
>
>