From @masak

<moritz_> is Z, the same as Z (as an infix operator)?
<jnthn> Think so.
<moritz_> rakudo​: say <a b c> Z, <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a 1b 2c 3␤»
<jnthn> rakudo​: say <a b c> Z <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a1b2c3␤»
<moritz_> rakudo​: say (<a b c> Z, <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«(("a", "1"), ("b", "2"), ("c", "3"))␤»
* masak smells a bug
<moritz_> well, I think the parcels should flatten in list context
<colomon> rakudo​: say (<a b c> Z <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«("a", "1", "b", "2", "c", "3")␤»
<jnthn> aye
<colomon> I think we still have flattening issues...
<jnthn> EOUTOFSTEAMROLLERS
* masak submits rakudobug

From @markjreed

Per S03, the fact that Z flattens is a bug, one that I submitted as
such. Am I reading something wrong or is the spec out of date? Don't
emulate Z's behavior for Z, if it's incorrect.

On Thursday, April 1, 2010, Carl Mäsak <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by  "Carl Mäsak"
# Please include the string​:  [perl #​73948]
# in the subject line of all future correspondence about this issue.
# <URL​: http://rt.perl.org/rt3/Ticket/Display.html?id=73948 >

<moritz_> is Z, the same as Z (as an infix operator)?
<jnthn> Think so.
<moritz_> rakudo​: say <a b c> Z, <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a 1b 2c 3␤»
<jnthn> rakudo​: say <a b c> Z <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a1b2c3␤»
<moritz_> rakudo​: say (<a b c> Z, <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«(("a", "1"), ("b", "2"), ("c", "3"))␤»
* masak smells a bug
<moritz_> well, I think the parcels should flatten in list context
<colomon> rakudo​: say (<a b c> Z <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«("a", "1", "b", "2", "c", "3")␤»
<jnthn> aye
<colomon> I think we still have flattening issues...
<jnthn> EOUTOFSTEAMROLLERS
* masak submits rakudobug

--
Mark J. Reed <markjreed@​gmail.com>

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

From @moritz

Mark J. Reed wrote​:

Per S03, the fact that Z flattens is a bug, one that I submitted as
such. Am I reading something wrong or is the spec out of date? Don't
emulate Z's behavior for Z, if it's incorrect.

The fact that list context doesn't flatten parcels is wrong - so
whatever Rakudo's infix​:<Z> does is wrong.

On Thursday, April 1, 2010, Carl Mäsak <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by "Carl Mäsak"
# Please include the string​: [perl #​73948]
# in the subject line of all future correspondence about this issue.
# <URL​: http://rt.perl.org/rt3/Ticket/Display.html?id=73948 >

<moritz_> is Z, the same as Z (as an infix operator)?
<jnthn> Think so.
<moritz_> rakudo​: say <a b c> Z, <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a 1b 2c 3␤»
<jnthn> rakudo​: say <a b c> Z <1 2 3>
<p6eval> rakudo 0dcfc6​: OUTPUT«a1b2c3␤»
<moritz_> rakudo​: say (<a b c> Z, <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«(("a", "1"), ("b", "2"), ("c", "3"))␤»
* masak smells a bug
<moritz_> well, I think the parcels should flatten in list context
<colomon> rakudo​: say (<a b c> Z <1 2 3>).perl
<p6eval> rakudo 0dcfc6​: OUTPUT«("a", "1", "b", "2", "c", "3")␤»
<jnthn> aye
<colomon> I think we still have flattening issues...
<jnthn> EOUTOFSTEAMROLLERS
* masak submits rakudobug

From @mathw

As far as I read from S03, infix​:<Z> is just a shorthand for
infix​:<Z,>. However, in Rakudo infix​:<Z> produces a flattened output
list, while infix​:<Z,> doesn't.

say (1, 2 Z 3, 4).perl
(1, 3, 2, 4)
say (1, 2 Z, 3, 4).perl
((1, 3), (2, 4))

S03 makes it clear to me that the non-flattened output is the correct
one, with examples like​:

1,2 Z 3,4 # (1,3),(2,4)

From @diakopter

On Sun Dec 05 01​:10​:21 2010, matt-w wrote​:

As far as I read from S03, infix​:<Z> is just a shorthand for
infix​:<Z,>. However, in Rakudo infix​:<Z> produces a flattened output
list, while infix​:<Z,> doesn't.

say (1, 2 Z 3, 4).perl
(1, 3, 2, 4)
say (1, 2 Z, 3, 4).perl
((1, 3), (2, 4))

S03 makes it clear to me that the non-flattened output is the correct
one, with examples like​:

1,2 Z 3,4 # (1,3),(2,4)

This seems correct now. marking testneeded.

15​:30 <diakopter> r​: say (1, 2 Z 3, 4).perl
15​:30 <p6eval> rakudo 3b1596​: OUTPUT«((1, 3), (2, 4)).list␤»

From @moritz

Now tested in S03-metaops/zip.t

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