Re: Loading multiple versions of a Module

[Martin Becze <mjbecze@riseup.net>]

Would this be something that is open to change? Would there be an objections to changing this behavior? I think this problem will hurt modularity and growth of the guile ecosystem in the future. From a cursory look at the code I don't see any technical reason for this. 



On May 3, 2020 2:33:50 PM CDT, "Ludovic Courtès" <ludo@gnu.org> wrote:
>Hi Martin,
>
>Martin Becze <mjbecze@riseup.net> skribis:
>
>> Guile currently doesn't allow loading multiple versions of a Module. For
>> example this will not work.
>>
>> --- start.scm
>> (import (a) (b (2)))
>> (helloA)
>> (helloB)
>>
>> --- a/a.scm
>> (library (a)
>>   (export helloA)
>>   (import (rnrs) (b (1)))
>>   (define helloA (lambda ()
>> 		  (display "hello from A1\n")
>> 		  (helloB))))
>>
>> --- b1/b.scm
>> (library (b (1))
>>  (export helloB)
>>  (import (rnrs)))
>>
>> (define helloB (lambda ()
>> 		 (display "hello from B1\n")))
>>
>> --- b2/b.scm
>> (library (b (2))
>>  (export helloB)
>>  (import (rnrs))
>>  (define helloB (lambda () (display "hello from B2\n"))))
>>
>> Is there are away to get around this? What is the reason for this
>> behavior? Is it part of r6rs or something?
>
>I’m not sure what R6RS says, but Guile supports only one instance of a
>module with a given name at run time.
>
>The only way around it would be to give the two modules different names.
>
>HTH,
>Ludo’.
>
>

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