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Re: Fwd: string is read-only

From: Maxime Devos
Subject: Re: Fwd: string is read-only
Date: Wed, 3 Aug 2022 11:59:39 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0

On 03-08-2022 11:51, Damien Mattei wrote:
and i suppose it is the standard, i have been confused by other schemes or racket where my code worked:

It happens to work in Guile too, when you use the interpreter instead of the compiler:

scheme@(guile-user)> (eval `(let ((a ,(string-copy "foo"))) (string-set! a 0 #\b) a) (current-module))
$1 = "boo"
However, as implied by <>, it's not something to rely upon.  (Maybe 'eval' should make all strings it encounters in the S-exp read-only first with substring/read-only, assuming that doesn't come with a performance cost.)


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