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[O] Why may some Org regexps be risky when set as buffer-local variables


From: Thorsten Jolitz
Subject: [O] Why may some Org regexps be risky when set as buffer-local variables?
Date: Sat, 29 Mar 2014 12:46:27 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

Hi List, 

there are dozens of regexps that are set as buffer-local variables when
org-mode is turned on as major-mode, but other regexps are defined and
set only once as global variables when e.g. org.el is loaded, and the
docstring of these variables often reads like this:

,---------------------------------------------------------------
| org-block-regexp is a variable defined in `org.el'.
| Its value is [...]
| 
|   This variable may be risky if used as a file-local variable.
| 
| Documentation:
| Regular expression for hiding blocks.
`---------------------------------------------------------------


Why are these variables considered risky when used as a file-local
variables? Was this "risk" the prime reason to make them global - or are
they global simply because there was no special reason to make them
buffer-local? 

-- 
cheers,
Thorsten





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