Re: [patch] Run occur command restricted to a region

[Tino Calancha]

On Fri, 30 Dec 2016, Juri Linkov wrote:

> Maybe we should use the same logic of other related commands in replace.el
> how-many, keep-lines, flush-lines that limit the affected lines to the
> active region, or when the region is not active, take only lines after
> the current line.  Then we don't need separate commands, and no keys for them.
Yeah, that is a source of confusion when using those tools:
1) Commands like `how-many' or `flush-lines' by default apply to the lines
   after point; they accept optional arguments to cover a region as well.
2) OTOH `occur' by default uses the entire buffer; it doesn't accept
   arguments to select a region.

It's a nice thing if all related tools follow similar defaults. 
Command `occur' is also used in `multi-occur', to search in multiple 
buffers: in that case you must search in the entire buffers.