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1. Hallå Kitteh (clacke@social.heldscal.la)'s status on Tuesday, 22-Aug-2017 05:37:08 UTC Hallå Kitteh

   • Scheme Programming Language
   • Guile Scheme
   > Pairs (immutable)
   
   http://web-artanis.com/scheme.html
   
   No, they're not. Can they be made such? In !scheme ? In !guile ?
   
   Quick search gave me no immediate answer (but I did find stuff like this).
   
   A mail convo somewhere seemed to say that R6RS says everything is mutable except when explicitly not, and mentioned strings from symbol->string as immutable.
   • Hallå Kitteh (clacke@social.heldscal.la)'s status on Tuesday, 22-Aug-2017 05:55:25 UTC Hallå Kitteh

     in reply to

     • Christine Lemmer-Webber
     https://www.gnu.org/software/guile/docs/docs-2.0/guile-ref/rnrs-mutable_002dpairs.html
     
     > All pairs in Guile are mutable
     
     Ah, there you go then.
     
     This should probably be in an ... ah, there it is. :-)
     
     https://srfi.schemers.org/srfi-116/
     
     Of course #sagittarius_scheme implements them :-) , but that's it. (assuming the correctness of the wiki)[0]
     
     Also "The Racket system takes the radical approach of making Scheme's pairs immutable", so doesn't need #srfi116 .
     
     I got curious about this because of something @cwebber (as himself) said about #8sync during that https://social.heldscal.la/notice/3492251 presentation.
     
     Thanks, #lazyweb!
     
     [0] http://practical-scheme.net/wiliki/schemexref.cgi?SRFI-116