Re: [Nano-devel] [PATCH] syntax: c: change the highlighting of preprocessor directives

[Benno Schulenberg]

Op 20-12-17 om 03:39 schreef Liu Hao:
> On 2017/12/20 2:46, Benno Schulenberg wrote:
> > Op 18-12-17 om 10:22 schreef Liu Hao:
> > > The second one is
> > > a less familiar GNU extension that matches the beginning of a search
> > > regardless of line breaks, exactly what is needed here.
> >
> > Where is this \` extension documented?
>
> <https://www.gnu.org/software/gnulib/manual/html_node/The-Backslash-Character.html>
>
> -----
> ‘\`’ represents the match-beginning-of-buffer operator and ‘\'’
> represents the match-end-of-buffer operator (see Buffer Operators).
> -----

Ah.  Thanks.  It is a match-beginning-of-buffer "anchor".  That makes
sense. Your "beginning of a search" wording had me puzzled.  But it is:
the beginning of the buffer in which to search.

But... how portable is this?  The BSDs won't understand this, I guess.
So how do we tell the BSDs that they should use the gnulib regex module?
Because we want to use GNU-specific regular expressions.

Benno