Re: Trouble with getpos()/setpos().

Christian Brabandt <cblists@256bit.org> a écrit:
> Hi Paul!
>
> On Sa, 30 Nov 2013, Paul Isambert wrote:
>
> > Hello all,
> >
> > I've encountered a behavior which really smells like a bug, but I'd
> > like to check here beforehand to be sure:
> >
> > Go into linewise visual mode and leave it. Show the position of the '> mark with:
> >
> > echo getpos("'>")
> >
> > It returns something like (if you were on line 23):
> >
> > [0, 23, 2147483647, 0]
> >
> > where the very big value for the column means you were in linewise
> > visual mode. Now try to set the '> mark with e.g.:
> >
> > echo setpos("'>", [0, 25, 12, 0])
> >
> > "0" is echoed, meaning nothing went wrong. Use "getpos("'>")" again to see
> > the position of the mark, this time you'll see:
> >
> > [0, 25, 2147483647, 0]
> >
> > The line was changed, but not the column. And it seems to happen
> > whenever the column number has that big value, i.e. whenever you went
> > into linewise visual mode.
> >
> > Am I missing something?
>
> You are seeing implementation details, leaking into the Vim API.
>
> You are in *linewise* visual mode, so it doesn't really make sense, to
> have the column somewhere different then either 0 or MAXCOLUMN.

Thanks Christian, I'm not in linewise visual mode, but just after I've
left it; I would understand if I were still in that mode, but that's
not the case.

> Also note, that '< will always be the upper position of these two marks
> within the buffer, while '> will always be the lower position of those
> two marks. (e.g. you can't set '> to a lower line then '< and you can't
> set '< to a larger line number then '>)

I'd noticed that. Actually, if you try to set '> before '<, the former
is set to the current value of the latter, which is set to the new
value.

> Das muß ein Esel sein, der mit fünfzig Jahren noch dieselben
> Anschauungen hat wie vor zwanzig Jahren.
> -- Otto von Bismarck

Good ol' Otto :)

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