Re: M-x toggle-theme

[Philip Kaludercic]

Jean Louis <bugs@gnu.support> writes:

> * Pankaj Jangid <pankaj@codeisgreat.org> [2022-11-22 10:03]:
>> 2. Earlier I wrote a function to toggle themes. Now it is builtin.
>
> I have just tried: M-x toggle-theme and I get error:
>
> toggle-theme: Theme ‘light-blue’ does not have any known variants
>
> This may be because 
>
>  '(custom-enabled-themes '(light-blue))
>
> So toggle-theme should have better working.

You misunderstand the mechanism by which toggle-theme works.  A theme
may declare a family:

  (deftheme tsdh-light
    "A light Emacs theme.
  Used and created by Tassilo Horn."
    :background-mode 'light
    :kind 'color-scheme
    :family 'tsdh)

When a theme of this family is enabled, M-x toggle-theme will either
prompt the user or toggle the theme to some other member of the family
automatically (the latter works if there are only two themes to switch
between).