Re: Error in C++ mode with Emacs 27.0.90

[Dmitry Gutov]

On 04.04.2020 14:46, Alan Mackenzie wrote:

> > > It seems unlikely that we can get a nested list (in imenu--index-alist)
> > > with only one element.  I have tried creating a C++ buffer with 25
> > > functions in it.  This gives a simple list of 25 elements.  With 26
> > > functions, I get a nested alist with two elements.
>
> > What's the worst that can happen in this case? We get a nested submenu
> > with just one element?
>
> Probably.

Doesn't sound too scary.

> > If you're implying we can get rid of the check and always return (cdr
> > menu), I say let's try.
>
> I think we can get rid of the check and just use (cdr menu), yes.  In
> master, that is.

Ok.

> Maybe for the release branch he would let in a patch like the one I've
> already applied.

Would you like to propose one? Given that we'd be copying your code anyway.

> imenu is _complicated_.

I think it's just overdoing with its list-of-lists approach, instead of 
proper structs. And it seems like we're dealing with extraneous code 
anyway (maybe even a premature optimization of sorts).