From @moritz

21​:04 < moritz> nom​: $_ = 'a'; /a/ ff /a/;
21​:04 <+p6eval> nom 327fc9​: OUTPUT«Method 'match' not found for invocant
of class 'Any'â�¤ in method Bool at src/gen/CORE.setting​:7239â�¤ in sub
infix​:<ff> at src/gen/CORE.setting​:8502â�¤ in block <anon> at
/tmp/YknKE09sGg​:1â�¤ in <anon> at /tmp/YknKE09sGg​:1â�¤Â»

the $_ that /a/ matches against ends up being Any, not 'a'. Compare with​:

21​:04 < moritz> nom​: $_ = 'a'; /a/ || /a/;
21​:04 <+p6eval> nom 327fc9​: ( no output )

works fine there

21​:05 < sorear> nom​: $_ = 'a'; m/a/ ff m/a/
21​:05 <+p6eval> nom 327fc9​: ( no output )
21​:05 < sorear> I think I see the problem
21​:06 < moritz> sorear​: what is it?
21​:07 < moritz> ah, probably the sub infix​:<ff>($a as Bool, $b as Bool)
21​:07 < sorear> moritz​: 'ff' is probably calling a helper sub, which
calls .Bool on the arguments ... but $_ doesn't exist in the helper sub
21​:07 < moritz> tries to coerce the regex to Bool, but no $_ present anymore

From @bbkr

$ perl6 -e '$_ = "foo"; if /./ ff /./ { .say } '
Method 'match' not found for invocant of class 'Any'
  in method Bool at src/gen/CORE.setting​:8102
  in sub infix​:<ff> at src/gen/CORE.setting​:9398
  in block <anon> at -e​:1

Conditions like "if /./ {} " works fine, somehow second /./ in flip-flop is not matched against $_.

This is perl6 version 2012.03-51-gcb61d59 built on parrot 4.2.0 revision RELEASE_4_2_0-98-gda3ed58

From @jnthn

On Thu Apr 19 04​:30​:56 2012, pawel.pabian@​implix.com wrote​:

$ perl6 -e '$_ = "foo"; if /./ ff /./ { .say } '
Method 'match' not found for invocant of class 'Any'
in method Bool at src/gen/CORE.setting​:8102
in sub infix​:<ff> at src/gen/CORE.setting​:9398
in block <anon> at -e​:1

Conditions like "if /./ {} " works fine, somehow second /./ in flip-
flop is not matched against $_.

This is perl6 version 2012.03-51-gcb61d59 built on parrot 4.2.0
revision RELEASE_4_2_0-98-gda3ed58

Seems to work now, after recent ff improvements​:

$_ = "foo"; if /./ ff /./ { .say }
foo

Tagging testneeded.

/jnthn

The RT System itself - Status changed from 'new' to 'open'

From @moritz

S03-operators/flip-flop.t has plenty of coverage already.

@moritz - Status changed from 'open' to 'resolved'