Re: [GNU m4 1.4.16] Shy groups in regular expressions

2012-03-12 Thread Eric Blake
On 03/11/2012 05:06 PM, Tim Landscheidt wrote: > Hi, > > the documentation for regexp says: > > | -- Builtin: regexp (STRING, REGEXP, [REPLACEMENT]) > | Searches for REGEXP in STRING. The syntax for regular expressions > | is the same as in GNU Emacs, which is similar to BRE, Basic >

Re: [GNU m4 1.4.16] Shy groups in regular expressions

2012-03-12 Thread Tim Landscheidt
Eric Blake wrote: > [...] > Shy groups are not part of glibc's re_compile_pattern, and are therefore > not a part of GNU m4. M4 is only using glibc's implementation with a > flags of 0, which happens to be emacs-compatible, and not extensions > such as shy groups that have later been added to j