Re: [Rd] Bug report: POSIX regular expression doesn't match for somewhat higher values of upper bound

> Von: Martin Maechler [mailto:maech...@stat.math.ethz.ch] > Gesendet: Mittwoch, 5. April 2017 11:15 > > > > > on Tue, 4 Apr 2017 08:45:30 + writes: > > > Dear Sirs, > > while > > >> regexpr('(.{1,2})\\1', 'foo') > > [1] 2 >

Re: [Rd] Bug report: POSIX regular expression doesn't match for somewhat higher values of upper bound

> > on Tue, 4 Apr 2017 08:45:30 + writes: > Dear Sirs, > while >> regexpr('(.{1,2})\\1', 'foo') > [1] 2 > attr(,"match.length") > [1] 2 > attr(,"useBytes") > [1] TRUE > yields the correct match, an

[Rd] Bug report: POSIX regular expression doesn't match for somewhat higher values of upper bound

Dear Sirs, while > regexpr('(.{1,2})\\1', 'foo') [1] 2 attr(,"match.length") [1] 2 attr(,"useBytes") [1] TRUE yields the correct match, an incremented upper bound in > regexpr('(.{1,3})\\1', 'foo') [1] -1 attr(,"match.length") [1] -1 attr(,"useBytes") [1] TRUE incorrectly yields no match. R