Hello,
alain.coch...@unistra.fr writes:
> Thanks for pointing this out. But boy is it complicated:
It is not. It follows regular isearch in Emacs. Quoting Emacs manual:
An upper-case letter anywhere in the search string makes the search
case-sensitive. Thus, searching for ‘Foo’ does not find ‘foo’ or ‘FOO’.
This applies to regular expression search as well as to literal string
search. The effect ceases if you delete the upper-case letter from the
search string. The variable ‘search-upper-case’ controls this: if it is
non-‘nil’ (the default), an upper-case character in the search string
make the search case-sensitive; setting it to ‘nil’ disables this effect
of upper-case characters.
> But it does not seem to apply to multi-occur, which 'C-c a /' is said
> to use: both 'C-c a /' and 'M-x multi-occur' for 'FOO' only list
> 'FOO'...
Then it is an issues in Emacs, not in Org specifically. Indeed,
multi-occur's docstrings is
Show all lines in buffers BUFS containing a match for REGEXP.
This function acts on multiple buffers; otherwise, it is exactly like
‘occur’.
and occur's is
If REGEXP contains upper case characters (excluding those preceded by ‘\’)
and ‘search-upper-case’ is non-nil, the matching is case-sensitive.
> From my (user) point of view, I would expect that what is supposed to
> be a regexp behaves like a regexp, and in a consistent way for all
> cases (with 'C-c a s', when filtering with
> org-agenda-filter-by-regexp, etc.).
This is why `org-occur-case-fold-search' is a defcustom. If you set it
to nil, your search obeys to your regexp.
> PS: in the org-occur docstring:
[...]
> The tree will show the lines where the regexp matches, and any
> other context defined in `org-show-context-detail', which see.
>
> the last sentence above looks grammatically/syntactically funny to me.
This is an Emacs idiom. You find it here and there in its manual and
some docstrings. See
<https://lists.gnu.org/archive/html/bug-gnu-emacs/2017-10/msg00518.html>
for a related discussion in another package.
Regards,
--
Nicolas Goaziou
