On 9 July 2016, Bram Moolenaar <[email protected]> wrote:
>
> Lcd wrote:
>
> > > > > > On 7 July 2016, Bram Moolenaar <[email protected]> wrote:
> > [...]
> > > > > I don't understand. What does "access to a buffer" mean?
> > > >
> > > > Syntastic is a sort of generalised compiler set, it runs
> > > > external compilers, and shows the results in a loclist. Except
> > > > it does a lot more than just open the loclist: it places signs,
> > > > adds highlighting patterns, shows errors in balloons, shows the
> > > > nearest error, and so on. There is some bookkeeping involved,
> > > > and syntastic needs actual buffers to set local options, local
> > > > variables, place signs, munge error messages according to
> > > > context, check that error lines are not outside the file, and
> > > > the like. Could all that be done starting from filenames?
> > > > Probably, with a rewrite from scratch of the core. Somebody
> > > > else might even take up that task some day.
> > > >
> > > > > Anyway, the idea was that this is only used for specific
> > > > > purposes where a buffer is not needed, e.g. a list of matches
> > > > > for "grep".
> > > >
> > > > The point is, there will be two kinds of loclists: "rich"
> > > > ones (with buffers), and "poor" ones (with filenames).
> > > > Syntastic would need to deal with both.
> > >
> > > I don't see the problem. If syntastic wants to do something that
> > > requires a buffer, then it opens that buffer. The only difference
> > > is that the buffer is created later, not when the item is added to
> > > the quickfix list.
> >
> > As I said, doing that would involve rewriting the core from
> > scratch.
> >
> > Admitting for the sake of the argument that rewriting wouldn't
> > be a problem, let's say there's a file "example.c" that's mentioned
> > in the list of errors, and I want to place a sign in it. The file
> > is not open, how would I do that? Let's say I open the file and
> > place the sign. Would jumping to the file from the loclist re-use
> > my buffer?
>
> Sorry, I still don't see a problem. As soon as it tries to get the
> buffer it will exist. How does it currently get the buffer?
Currently an error item from loclist looks like this:
{
'lnum': 148,
'bufnr': 1,
'col': 7,
'valid': 1,
'vcol': 0,
'nr': -1,
'type': 'W',
'pattern': ',
'text': '(3) CodeLayout::ProhibitHardTabs: Hard tabs used (See page
20 of PBP)'
}
If I want to place a sign at the file, I can do this:
sign place 12345 line=148 name=SyntasticError buffer=1
This works regardless if the fuffer is hidden or not, and can be
done before the user jumps to the error.
How would I do the same starting only with a filename, assuming the
user hasn't jumped to the error yet, or opened the file?
/lcd
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