bug#13278: 24.3.50; Attributes aren't inherited in a copied face across frames

[Katsumi Yamaoka <yamaoka@jpl.org>]

Chong Yidong <cyd@gnu.org> wrote:
> Katsumi Yamaoka <yamaoka@jpl.org> writes:

>> Since at least 20.7, I verified.  Perhaps is the present behavior
>> the spec?

> There is no "spec", but it's more or less expected behavior.

Ok.  Though I cannot imagine using such a strange function usefully.

>>> Something to do with the FRAME argument of both these functions,
>>> I imagine.

>> So far I didn't find the way to make `my-bold' always bold by
>> fiddling them.

> May I ask why you are trying to use `copy-face' instead of `defface'?

I've been using it conveniently since the face feature was introduced
in Emacs.  For example, it's handy when I want a face of which only
the color differs from the built-in one:

(copy-face 'bold 'orange-bold)
(set-face-foreground 'orange-bold "Orange")

Of course doing it by defface is not so troublesome, so I can live
without copy-face.

> As the docstring of `copy-face' indicates, it is mostly intended for
> internal usage,

Oh, I didn't notice the docstring having changed recently.  I must
close this thread.  Thanks anyway.

> and you are likely to screw up the face's customization
> data if you call it directly.  If you give more details about the
> use-case, that would be good.