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AUCTeX depends heavily on being able to extract information from the buffers by parsing them. Since parsing the buffer can be somewhat slow, the parsing is initially disabled. You are encouraged to enable them by adding the following lines to your `.emacs' file.
(setq TeX-parse-self t) ; Enable parse on load. (setq TeX-auto-save t) ; Enable parse on save.
The latter command will make AUCTeX store the parsed information in an `auto' subdirectory in the directory each time the TeX files are stored, see section 11.3 Automatic Customization for a Directory. If AUCTeX finds the pre-parsed information when loading a file, it will not need to reparse the buffer. The information in the `auto' directory is also useful for multifile documents see section 8. Multifile Documents, since it allows each file to access the parsed information from all the other files in the document. This is done by first reading the information from the master file, and then recursively the information from each file stored in the master file.
The variables can also be done on a per file basis, by changing the file local variables.
%%% Local Variables: %%% TeX-parse-self: t %%% TeX-auto-save: t %%% End:
Even when you have disabled the automatic parsing, you can force the generation of style information by pressing C-c C-n. This is often the best choice, as you will be able to decide when it is necessary to reparse the file.
When AUCTeX saves your buffer, it can optionally convert all tabs in your buffer into spaces. Tabs confuse AUCTeX's error message parsing and so should generally be avoided. However, tabs are significant in some environments, and so by default AUCTeX does not remove them. To convert tabs to spaces when saving a buffer, insert the following in your `.emacs' file:
(setq TeX-auto-untabify t)
Instead of disabling the parsing entirely, you can also speed it
significantly up by limiting the information it will search for (and
store) when parsing the buffer. You can do this by setting the default
values for the buffer local variables
TeX-auto-parse-length in your `.emacs' file.
;; Only parse \documentstyle information. (setq-default TeX-auto-regexp-list 'LaTeX-auto-minimal-regexp-list) ;; The documentstyle command is usually near the beginning. (setq-default TeX-auto-parse-length 2000)
This example will speed the parsing up significantly, but AUCTeX will no longer be able to provide completion for labels, macros, environments, or bibitems specified in the document, nor will it know what files belong to the document.
These variables can also be specified on a per file basis, by changing the file local variables.
%%% Local Variables: %%% TeX-auto-regexp-list: TeX-auto-full-regexp-list %%% TeX-auto-parse-length: 999999 %%% End:
The pre-specified lists of regexps are defined below. You can use these before loading AUCTeX by quoting them, as in the example above.
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