Re: [Sbcl-help] defconstant

[Michał p. H. <ph...@di...>]

Use alexandria:define-constant with :test #'equal.

W dniu 2026-05-21 00:58, Greg Bennett napisał(a):

> Running sbcl 2.6.4 under linux mint 22.3
> 
> The file ~/RESREVE/test-defconstant.lsp contains the single line
> 
> (defconstant +zot+ '("a" "b"))
> 
> Compiling that file and then loading test-defconstant.fasl leads to
> 
> (load "~/RESERVE/test-constant.fasl")
> 
> debugger invoked on a DEFCONSTANT-UNEQL in thread
> #<THREAD tid=391763 "main thread" RUNNING {1200038003}>:
> The constant +ZOT+ is being redefined (from ("a" "b") to ("a" "b"))
> See also:
> The ANSI Standard, Macro DEFCONSTANT
> The SBCL Manual, Node "Idiosyncrasies"
> 
> Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.
> 
> restarts (invokable by number or by possibly-abbreviated name):
> 0: [CONTINUE] Go ahead and change the value.
> 1: [ABORT   ] Keep the old value.
> 2:            Exit debugger, returning to top level.
> 
> (SB-IMPL::%DEFCONSTANT +ZOT+ ("a" "b") 
> #S(SB-C:DEFINITION-SOURCE-LOCATION :NAMESTRING 
> "~/RESERVE/test-constant.lsp" :INDICES 32769) NIL)
> 0] 2
> 
> Is there a way to avoid this situation ?
> 
> Cheers,
> Greg
> 
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