Re: set statusline doesn't accept OR expression

On Wed, Mar 6, 2019 at 5:05 AM Hausen Schaff <seaspeak@gmail.com> wrote:
>
> I'm trying this in vimrc. Vim warns me an error.
>
> set statusline+=%{(&bomb=='1'&& &binary=='0' && (&fenc=='utf-8' || &fenc=='utf-2')) ? '[bom]' : ''}
>
>
> If I change the OR "||" to "&&", then everything is OK. Any advice is appreciated.
>
All spaces and vertical bars in the value must be backslash-escaped,
see :help option-backslash

Try
:set stl+=%{(&bomb\ &&\ !&binary\ &&\ ((&fenc\ ==\ ""\ &&\ &enc\ =~?\
'^u')\ \|\|\ &fenc\ =~?\ '^u')?'[bom]':""}

All these escaping backslashes will disappear in the value displayed
by ":set stl?" (without the quotes of course).

Note the use of =~? '^u' to mean "anything beginning with u or U". I
also omit =1 or =0 for a boolean variable, testing respectively for
nonzero or not(nonzero).

Best regards,
Tony.

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