Paolo Bonzini wrote: > On 06/15/2011 09:12 PM, Jim Meyering wrote: >> However, backreferences force these tools to skip the DFA-based >> optimization and resort to running the regexp code. In that case, >> there is a dichotomy. Adding a backreference to a range-including >> regexp would have the surprising consequence of changing how that range >> is interpreted when the tool is built to use glibc's regexp code. >> >> Thus, if we go this route, we are effectively saying >> that people who want self-consistent regex-handling >> in our tools must build with --with-included-regex or end >> up causing subtle problems. > > This is not true, the latest releases bail out not just for > backreferences but also for ranges (MBCSETs). This was done for > performance reasons, but also to avoid exactly this problem.
Confirmed. Thanks for the correction. That'll teach me to rely on mere memory ;-) This makes switching to RRI even easier.
