bug#36139: [PATCH] Make better use of the switch op in cond forms

["Mattias Engdegård" <mattiase@acm.org>]

10 juni 2019 kl. 17.38 skrev npostavs@gmail.com:
> 
> Redefining eq, equal, memq, or member with defun or advice is already
> unreliable because they are translated to byte codes.  eql and memql are
> not, so this patchset (specifically, the last 2 patches, I think) would
> make the situation a bit worse for those functions, in that it would
> prevent defun/advice override for eql and memql from applying in cond
> forms.

`eql' is already recognised for switch generation in cond forms today. More generally, is redefinition of such fundamental built-ins really a serious concern? The compiler assumes standard semantics for plenty of functions, byte-codes or not. This is also mentioned in the manual.