Re: tlug: [Q] Emacs Outline mode for LaTeX doc (fwd)

["Stephen J. Turnbull" <turnbull@example.com>]

>>>>> "Craig" == Craig Oda <craig@example.com> writes:

    Craig> On Wed, 24 Dec 1997, Stephen J. Turnbull wrote:
    >> >>>>> "Oda" == Tokyo Linux Users Group <tlug@example.com> writes:
    >> 
    Oda> Hi, is there an easy way for me to place a LaTeX document in
    Oda> emacs outline mode where I can collapse and expand headings
    Oda> based on \section, \subsection, and \subsubsection
    Oda> seperators.
    >> Yes.  You just put it in outline minor mode and set the header
    >> regexp to "\\\(sub\)*section".  I forget where that regexp
    >> lives, look in the docs for the outline minor mode.  Gotta
    >> run....

    Craig> Thanks.

    Craig> I getting

    Craig>  Invalid regexp: "Unmatched ( or \\("

    Craig> errors.

As well you should.  I gave you the interactive form (eg, for use with 
`search-forward-regexp').  In a lisp string you need yet another level 
of escaping, and the regexp becomes

		       "\\\\\\(sub\\)*section"

The Lisp reader converts each of the doubled backslashes to a single
one, producing the expression I originally gave as a string in
internal representation.  Then the regexp compiler/interpreter
converts the leading "\\" to a literal backslash (to match the TeX
macro operator), and the "\(" and "\)" to regexp grouping/matching
constructs.

Whew!
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