Re: patsubst: multiline text
Eric Blake <[email protected]>
| Newsgroups | gmane.comp.gnu.m4.general |
|---|---|
| Organization | Red Hat |
| Message-ID | <[email protected]> |
On 09/08/2010 03:45 PM, clemens fischer wrote: > Eric Blake wrote: > >> M4 1.4.x only supports the glibc emacs flavor of regexp. M4 2.0 has >> improved regex support, allowing you to choose different flavors >> supported by glibc, such as strict posix, extended regex, and so >> forth, but still needs tweaking before it will support tunables like >> case-insensitivity. > > So the non-greedy "?" postfix operator is not available below m4-2, did > I get this right? > > It takes so much time to experimentally determine what works and what > doesn't, would it be possible to document the RE syntax available in > m4-1.x? Even if only a README text, it would help quite a bit. The current regexp syntax already IS documented. In the m4 manual, http://www.gnu.org/software/m4/manual/m4.html#Regexp has a link to: http://www.gnu.org/software/emacs/manual/html_node/emacs/Regexps.html#Regexps (well, I had to click through a few pages to find it; perhaps we can patch the m4 manual to have a more direct link...) -- Eric Blake [email protected] +1-801-349-2682 Libvirt virtualization library http://libvirt.org