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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:305382 Archived-At: 17 apr. 2023 kl. 19.37 skrev Stefan Monnier : >> (cons X1 ... (cons Xn Y)...) >>=20 >> into >>=20 >> (nconc (list X1 ... Xn) Y) >=20 > Hmm.., turning a pure expression into a (internally) side-effecting = one? The transform would have to be made at a low enough level where purity = no longer matters, perhaps in codegen. (Until we get a GC that penalises = mutation.) > How 'bout adding&using `list*` instead? I wouldn't mind adding `list*` at all. (It would eventually compile to = list + nconc, of course.) We could make backquote emit `list*` and avoid stack overflow problems = of the sort that was mentioned earlier (or maybe it was something else).