Re: About equality in Emacs

[Michael Heerdegen]

Michael Heerdegen <michael_heerdegen@web.de> writes:

> > I'm confused with the last sentence.  Don't `memq' and `assq' compare
> > objects with `eq'?  Why does the manual say that they "get functions
> > which use `eql' for comparisons"?
>
> Doesn't make much sense to me as well.  I filed a bug report; it's now
> bug#13620.  I think this sentence was just damaged when it was updated.

Has already been fixed by Glenn Morris.  This is the new version of the
paragraph:

,----------------------------------------------------------------------
|    Also note that the Common Lisp functions `member' and `assoc' use
| `eql' to compare elements, whereas Emacs Lisp follows the MacLisp
| tradition and uses `equal' for these two functions.  The functions
| `cl-member' and `cl-assoc' use `eql', as in Common Lisp.  The standard
| Emacs Lisp functions `memq' and `assq' use `eq', so you can use these
| if you do not care about the difference between `eq' and `eql'.
| 
`----------------------------------------------------------------------

Thanks Xue for finding this.


Regards,

Michael.