bug#16913: Please extend case-fold-search on-the-fly toggling

[Lars Ingebrigtsen]

Reuben Thomas <rrt@sc3d.org> writes:

> The idea was to add the capability to do case-insensitive matching to
> all commands that read regexs. The list of simple commands one would
> have to write could be quite long!

Yup.  I don't know what the best way for `read-regexp' to communicate
this back up to the caller, though.  Perhaps the easiest would be to
just add a new optional parameter to `read-regexp' that would make it
activate the `M-c' key binding, and then return a list that has both the
regexp we read and whether the user used a case twiddling command.

Callers like rgrep would have to be changed, but that's the case anyway.

-- 
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