Re: Fwd: string is read-only

[Maxime Devos]

On 03-08-2022 11:51, Damien Mattei wrote:

ok

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 <https://lists.gnu.org/archive/html/guile-devel/2012-01/msg00135.html>, 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.)

Greetings,
Maxime.

OpenPGP_0x49E3EE22191725EE.asc
Description: OpenPGP public key

OpenPGP_signature
Description: OpenPGP digital signature