From liukan@360.cn

15​:20 < kanl> my $a = bag( -Inf .. Inf ); my $b = bag( 1 .. 3 ); my $c = bag();
  say $a(+)$b(+)$c; ## this won't work
15​:21 < kanl> 1. Inf is not properly guarded
15​:21 < kanl> 2. the (whatever) operator requires leading whitespaces.
15​:21 < kanl> 3. can't mix the operators without grouping ()
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); say $a(+)$b;
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); my $c = bag();
  say $a (+) $b (-) $c;
15​:23 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while compiling
  /tmp/hlD7eRLLzWâ�¤Prefix + requires an argument, but no valid
  term foundâ�¤at /tmp/hlD7eRLLzW​:1â�¤------> .. 4 ); my $b = bag(
  1 .. 3 ); say $a(+â��)$b;â�¤ expecting any of​:â�¤ prefixâ�¤Â»
15​:24 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while compiling
  /tmp/YpB9DyyE64â�¤Operators '(+)' and '(-)' are non-associative
  and require parenthesesâ�¤at /tmp/YpB9DyyE64​:1â�¤------> ( 1 .. 3
  ); my $c = bag(); say $a (+) $bâ�� (-) $c;â�¤ expecting any
  of​:â�¤ iâ�¦Â»

From @AlexDaniel

1. I think it is properly guarded now. (error message​: Cannot coerce a lazy list onto a Bag)
2. That's OK. A lot of things require whitespace in 6lang (another example here​: https://docs.6lang.org/language/traps#Less_than_vs._Word_quoting/Associative_indexing ). If you insist on no whitespace you're free to use â��.
3. Here's the current error message​: “Only identical operators may be list associative; since '(+)' and '(-)' differ, they are non-associative and you need to clarify with parentheses”. I'm not sure if (+) and (-) should work without parens.

I think we need a test for the first issue, second issue can be rejected and 3rd has to be separated into a separate RFC ticket.

Therefore TESTNEEDED. Whoever writes a test can decide whether 3rd issue should be rejected or separated into another ticket :)

On 2015-07-09 02​:27​:18, liukan@​360.cn wrote​:

15​:20 < kanl> my $a = bag( -Inf .. Inf ); my $b = bag( 1 .. 3 ); my $c
= bag();
say $a(+)$b(+)$c; ## this won't work
15​:21 < kanl> 1. Inf is not properly guarded
15​:21 < kanl> 2. the (whatever) operator requires leading whitespaces.
15​:21 < kanl> 3. can't mix the operators without grouping ()
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); say
$a(+)$b;
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); my $c =
bag();
say $a (+) $b (-) $c;
15​:23 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while
compiling
/tmp/hlD7eRLLzW�Prefix + requires an argument, but no
valid
term foundâ�¤at /tmp/hlD7eRLLzW​:1â�¤------> .. 4 ); my
$b = bag(
1 .. 3 ); say $a(+â��)$b;â�¤ expecting any of​:â�¤
prefixâ�¤»
15​:24 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while
compiling
/tmp/YpB9DyyE64�Operators '(+)' and '(-)' are non-
associative
and require parenthesesâ�¤at /tmp/YpB9DyyE64​:1â�¤------>
( 1 .. 3
); my $c = bag(); say $a (+) $b� (-) $c;�
expecting any
of​:â�¤ i…»

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

From @AlexDaniel

Bisected. First issue was resolved in rakudo/rakudo@11f27a3

On 2017-10-01 23​:59​:39, alex.jakimenko@​gmail.com wrote​:

1. I think it is properly guarded now. (error message​: Cannot coerce a
lazy
list onto a Bag)
2. That's OK. A lot of things require whitespace in 6lang (another
example
here​:
https://docs.6lang.org/language/traps#Less_than_vs._Word_quoting/Associative_indexing
). If you insist on no whitespace you're free to use �.
3. Here's the current error message​: “Only identical operators may be
list
associative; since '(+)' and '(-)' differ, they are non-associative
and you
need to clarify with parentheses”. I'm not sure if (+) and (-) should
work
without parens.

I think we need a test for the first issue, second issue can be
rejected and
3rd has to be separated into a separate RFC ticket.

Therefore TESTNEEDED. Whoever writes a test can decide whether 3rd
issue should
be rejected or separated into another ticket :)

On 2015-07-09 02​:27​:18, liukan@​360.cn wrote​:

15​:20 < kanl> my $a = bag( -Inf .. Inf ); my $b = bag( 1 .. 3 ); my
$c
= bag();
say $a(+)$b(+)$c; ## this won't work
15​:21 < kanl> 1. Inf is not properly guarded
15​:21 < kanl> 2. the (whatever) operator requires leading
whitespaces.
15​:21 < kanl> 3. can't mix the operators without grouping ()
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); say
$a(+)$b;
15​:23 < kanl> m​: my $a = bag( 1 .. 4 ); my $b = bag( 1 .. 3 ); my $c

bag();
say $a (+) $b (-) $c;
15​:23 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while
compiling
/tmp/hlD7eRLLzW�Prefix + requires an argument, but no
valid
term foundâ�¤at /tmp/hlD7eRLLzW​:1â�¤------> .. 4 ); my
$b = bag(
1 .. 3 ); say $a(+â��)$b;â�¤ expecting any of​:â�¤
prefixâ�¤»
15​:24 <+camelia> rakudo-moar 377672​: OUTPUT«===SORRY!=== Error while
compiling
/tmp/YpB9DyyE64�Operators '(+)' and '(-)' are non-
associative
and require parenthesesâ�¤at /tmp/YpB9DyyE64​:1â�¤------>
( 1 .. 3
); my $c = bag(); say $a (+) $b� (-) $c;�
expecting any
of​:â�¤ i…»

From @zoffixznet

Tests​: Raku/roast@0431615286

Whoever writes a test can decide whether 3rd
issue should
be rejected or separated into another ticket :)

Rejected

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