Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
LaCheck(1)		    General Commands Manual		    LaCheck(1)

       lacheck - A consistency checker for LaTeX documents.

       lacheck filename[.tex]

       LaCheck	is  a general purpose consistency checker for LaTeX documents.
       It reads	a LaTeX	document and displays warning messages,	 if  it	 finds
       bad sequences. It should	be noted, that the badness is very subjective.
       LaCheck is designed to help find	common mistakes	 in  LaTeX  documents,
       especially those	made by	beginners.

       The things checked are:

       Mismatched  groups  (braces),  environments  and	 math mode delimiters.
       When a mismatch is found, line numbers for both start and  end  of  the
       mismatch	 is  given. The	error messages comes in	pairs, one for the end
       match and one for the beginning,	marked	with  `<-'  and	 `->'  respec-

       Bad  spacing including missing a	`\ ' after an abbreviation, missing an
       `\@' before a punctuation mark in a paragraph that is ended by an capi-
       tal  letter, double spaces like `  ', bad usage of ellipsis (like using
       ... instead of \ldots, or using \ldots where \cdots  should  be	used),
       missing	    before  a  \cite or	\ref commands, space before footnotes,
       italic corrections before comma,	point, or italic text, italic  correc-
       tion  after  normal text, missing italic	correction when	switching from
       italic to normal	text, and double italic	correction.

       Badly placed punctuation	marks around end of math mode delimiters. This
       is,  punctuation	 placed	 right	after  display math end	or punctuation
       placed right before text	math end.  Sequences of	whitespace followed by
       punctuation marks are also caught.

       Bad  use	 of  quotation	characters,  i.e.  constructs  like "'word" or
       "word`" are warned about, tabs in  verbatim  environments  are  caught,
       certain	TeX  primitives	are frowned upon, attempts to give font	speci-
       fiers arguments such as \em{text} are noted, and	 use  of  @  in	 LaTeX
       macros are reported.

       LaCheck will read files that are	input using \input or \include.	 Files
       with suffix `.sty' are omitted, as they probably	will cause LaCheck  to

       LaCheck may be invoked from within Emacs(1) using compile:

       To  run:	M-x compile RET	lacheck	RET , and then C-x ` to	parse the mes-

       The output is UNIX-error	like, and may be parsed	using Emacs(1) compile
       mode. Here is a sample:

       lacheck compiler
       "/usr/mef/compiler.tex",	line 34: missing `\\\\ ' after "etc."
       "/usr/mef/compiler.tex",	line 179: double space at " ~"
       "/usr/mef/compiler.tex",	line 186: <- unmatched "}"
       "/usr/mef/compiler.tex",	line 181: -> unmatched "$$"

       A  control space	`\ ' should be inserted	at line	34, to prevent an end-
       of-sentence space.  Also, at line 179, the first	space of the  sequence
       "  ~"  should  probably	be deleted.  The last two lines	is an example,
       where the user mistyped,	and probably inserted an extra "}" somewhere.

       Some special cases should be explained. In cases	where a	sentence  ends
       with  something	that LaCheck thinks is an abbreviation an missing `\ '
       error may also occur, if	the following sentence begins with a lowercase

       A mismatch error	may cause more to follow, due to the chosen algorithm.
       In such cases just correct the first error and run LaCheck again

       Braces, environments and	math mode must be balanced within a file.

       LaCheck may be confused by unmatched stuff placed inside	 verbatim-like
       environments called something else than exactly `verbatim'.

       tex(1), emacs(1), latex(1)

       LaCheck	gets  confused by advanced macros, is fooled by	simple macros,
       can't figure out	if you use a non-standard way to switch	italic	on  or
       off, does not like TeX at all, does not provide any options to turn off
       specific	warnings, and is at best a crude approximation.

       Ideas for improvements and bug reports are very welcome.	  Such	should
       be directed to the maintainers; please email

       Kresten	Krab  Thorup  with modifications by Per	Abrahamsen.  Currently
       maintained as part of TeX Live (

Release	1.28			  2015-01-10			    LaCheck(1)


Want to link to this manual page? Use this URL:

home | help