On 03.08.2022 11:50, Jean Abou Samra wrote: > > >> 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/ <https://srfi.schemers.org/srfi-135/> > >>
This SRFI defines a new data type, which is not really relevant here. As far as I know, Guile doesn't support it yet anyway. -- Taylan