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| From: | Pierpaolo Bernardi |
| Subject: | Re: string is read-only |
| Date: | Wed, 03 Aug 2022 13:55:56 +0200 |
Il giorno 3 agosto 2022, alle ore 13:36, Damien Mattei <damien.mattei@gmail.com> ha scritto:
>On Wed, Aug 3, 2022 at 12:59 PM Maxime Devos <maximedevos@telenet.be> wrote:
>>
>> (My unverified hypothesis on why you aren't seeing an error here.)
>>
>>
>> it would be a big change and very strange :-O if the few lines of code
>below in scheme returned an error on lists:
>but no restrictions with lists in Guile:
>scheme@(guile-user)> (define lst '(1 2 3))
>scheme@(guile-user)> (set-car! lst 7)
>scheme@(guile-user)> lst
>(7 2 3)
This is illegal scheme. The consequences of executing it are undefined.
It's unfortunate that because of implementation limitations many schemes do not detect this error.
>it is interesting ,at the end of page it says too that modifying quoted
>litteral should create an error :-O
It's how all Lisps, including guile, works. So, yes, if one is interested in these languages, this is interesting knowledge :)
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