> Le 3 août 2022 à 11:49, Taylan Kammer <taylan.kam...@gmail.com> a écrit : > > On 03.08.2022 11:12, Damien Mattei wrote: >> GNU Guile 3.0.1 >> Copyright (C) 1995-2020 Free Software Foundation, Inc. >> >> Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'. >> This program is free software, and you are welcome to redistribute it >> under certain conditions; type `,show c' for details. >> >> Enter `,help' for help. >> scheme@(guile-user)> (define str2 "hello") >> scheme@(guile-user)> (string-set! str2 4 #\a) >> ice-9/boot-9.scm:1669:16: In procedure raise-exception: >> string is read-only: "hello" >> >> Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. >> scheme@(guile-user) [1]> ,q >> scheme@(guile-user)> (string? str2) >> #t >> >> is it a bug in Guile ? :-O >> >> i can only find reference to deprecated read-only string in old doc: >> https://www.gnu.org/software/guile/docs/docs-1.6/guile-ref/Read-Only-Strings.html#Read%20Only%20Strings >> >> <https://www.gnu.org/software/guile/docs/docs-1.6/guile-ref/Read-Only-Strings.html#Read%20Only%20Strings> >> >> Regards, >> >> Damien > > String literals are constants, and it's intentional. > > I'm not sure if it's mentioned anywhere in the manual. > > If you want to get a mutable string from a literal, you can use: > > (define str (string-copy "foobar")) > > -- > Taylan
This is standard. See the intro of https://srfi.schemers.org/srfi-135/ >
