Documentation for the regexp module

[Jose E. Marchesi]

Hi.

Recently someone noted that the recutils manual does not document the
flavor of the regular expressions accepted in selection expressions and
field type declarations.

I am using regcomp/regexec to implement those facilities, and have the
regex module imported from gnulib.

I think it would be nice to make the regex module to import a texinfo
file documenting the supported regular expressions syntax (I guess the
POSIX BREs and EREs).  Something that could be directly included in a
manual.  Quite like the parse-datetime.texi file imported by the
parse-datetime module.

There is a file doc/regex.texi containing several chapters about the GNU
regex implementation.  We could get the "Regular Expression Syntax"
chapter in its own file regex-syntax.texi, and have that file imported
into doc/ as part of the regex module.

What do you think?

-- 
Jose E. Marchesi    address@hidden
GNU Project         http://www.gnu.org