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

[Benno Schulenberg]

[It seems your mail didn't make it to the list.  So I am quoting in full.]

Op 21-12-17 om 02:29 schreef Liu Hao:
> On 2017/12/21 3:00, Benno Schulenberg wrote:
> > 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.
>
> I don't know. AFAICT the \< and \> things are already GNU extensions, so it is
> less vicious to have another extension.  :|

Well, for \< and \> we have fixbounds() -- see in src/utils.c.  So, if
there is a BSD equivalent of \`, we could add it to "fixbounds".

> There were indeed problems when building GNU nano using the bundled regex
> library from GNUlib. I can't recall for now... IIRC it didn't recognize
> [[:alpha:]], [[:space:]] etc (maybe it was \s, \w etc), Therefore I had to get
> a regex library ripped from Glibc.

Strange.  I would have thought that the stuff in gnulib closely matches
the stuff in glibc.

> Fortunately it had already been already done and as long as both were GPL'd it
> was safe to be incorporated into nano.

Benno