if not $tmpl ~~ m/\.txt$/ { ... }
fails the same way.
if not $tmpl ~~ /\.txt$/ { ... }
works like a charm.
Gabor
On Tue, Dec 30, 2014 at 9:48 AM, Patrick R. Michaud <pmich...@pobox.com>
wrote:
> I suspect it may be some weirdness with the way that $_ is being handled
> in smartmatching, then.
>
> I think there's a slight difference between
>
> $tmpl ~~ /regex/
>
> and
>
> $tmpl ~~ m/regex/
>
> The first one does the equivalent of /regex/.ACCEPTS($tmpl), which ends up
> matching $tmpl directly against the regex and returning the resulting Match
> object.
>
> The second one temporarily assigns $tmpl into $_, then m/regex/ does an
> immediate match against underscore to produce a Match object, which then
> has .ACCEPTS($tmpl) called on it (which returns the Match object).
>
> I don't know exactly what is happening when !~~ is used with m/.../ --
> i.e., when $_ is being assigned, what is happening to the Match object, and
> where negation is taking place. It would be interesting to know if the
> following fails for you also:
>
> if not $tmpl ~~ m/\.txt$/ { ... }
>
> Pm
>
>
> On Tue, Dec 30, 2014 at 09:29:39AM +0200, Gabor Szabo wrote:
> > No. If I remove the leading m from the regex, then the bug is gone.
> > Gabor
> >
> > On Tue, Dec 30, 2014 at 9:19 AM, Patrick R. Michaud <pmich...@pobox.com>
> > wrote:
> >
> > > Out of curiosity, is the bug still present if you use /\.txt$/ instead
> of
> > > m/\.txt$/ ?
> > >
> > > At the moment it looks like a Rakudo bug to me, but I haven't been
> able to
> > > golf it further to be certain.
> > >
> > > Pm
> > >
> > > On Tue, Dec 30, 2014 at 09:11:52AM +0200, Gabor Szabo wrote:
> > > > Just to follow-up:
> > > > The problem appears in
> > > >
> > >
> https://github.com/szabgab/Perl6-Maven/commit/4346c96d63e97def55e789bbeebdbdaebe8b0b33
> > > >
> > > > After that I have replaced the regex match with
> > > >
> > > > if substr($tmpl, *-4) ne '.txt' {
> > > >
> > > > that works correctly, but I'd still like to understand if the bug
> was in
> > > my
> > > > code, or if this is some Rakudo issue?
> > > >
> > > > Gabor
> > > >
> > > >
> > >
>
