When entering a regular expression argument in the shell
command line it is often necessary to use quoting (enclosing
the argument in " "
or
' '
) in order to prevent the shell
from interpreting certain characters, for example, spaces as
argument separators and $
as variable
expansions.
Unfortunately it is hard to achieve this in a manner that is
portable across POSIX shells, such as those found on
GNU/Linux and UNIX, and Windows shell. For example, if you
use " "
for quoting you will get a
wrong result with POSIX shells if your expression contains
$
. The standard way of dealing with this
on POSIX systems is to use ' '
instead.
Unfortunately, Windows shell does not remove ' '
from arguments when they are passed to applications. As a result you
may have to use ' '
for POSIX and
" "
for Windows ($
is
not treated as a special character on Windows).
Alternatively, you can save regular expression options into
a file, one option per line, and use this file with the
--options-file
option. With this approach
you don't need to worry about shell quoting.
If the input file is not valid C++, odb
will issue diagnostic messages to STDERR and exit with non-zero exit
code.
Send bug reports to the odb-users@codesynthesis.com mailing list.