bug#25890: `color-values` gives wrong value

["mail@yo.eki.do" <mail@yo.eki.do>]

2017-03-10 18:28 GMT+09:00 Eli Zaretskii <eliz@gnu.org>:
> Packages that need to support older versions of Emacs will have to
> provide a wrapper function that indeed looks at emacs-version.  That's
> nothing new.

Yes, you are right.
The point is, if it is possible, preserving the original behavior
would produce less confusion for developers.

2017-03-10 18:28 GMT+09:00 Eli Zaretskii <eliz@gnu.org>:
>> From: "mail@yo.eki.do" <mail@yo.eki.do>
>> Date: Fri, 10 Mar 2017 08:33:59 +0000
>>
>> This change will have too large impacts since the number of parameters
>> will change.
>> Indeed developers can use the optional argument, but that trick won't
>> work in the previous version of Emacs and will lead to
>> wrong-number-of-arguments errors,
>> so they will need burdensome workarounds e.g. version check.
>
> Packages that need to support older versions of Emacs will have to
> provide a wrapper function that indeed looks at emacs-version.  That's
> nothing new.
>
>> I'd have to say that the default argument should stick to 2, the original.
>
> That would leave the original problem in place, so I don't think it's
> acceptable.