bug#16577: Add regexp-based version of completion-ignored-extensions

[Lars Ingebrigtsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> There are several file name patterns I've wanted to ignore but couldn't
> because enumerating them all is somewhere between inconvenient
> and impossible (whereas a regexp would cover them easily).

I wonder whether it would be easier to add two new variables, but
perhaps that's excessive.

That is, completion-ignored-extensions as before, and
completion-ignored-files (a list of strings) and
completion-ignored-regexp (a regexp or a list of regexps).  The
advantage is that the semantics on all three variables would be pretty
self evident, and would require no special syntax anywhere.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no