9 Comments.

Some uses I know of which do not appear to be in your list:

say :: # Pseudopackage representing null namespace?

say X::.keys # The package X treated as a hash

42.Int::Int # Call Int method of Int class

-> Numeric ::T \x { say T }(42) # T takes value's type

my regex foo { $var; } # declare vars in regex scope

my regex bar { a: b:? c:! :: ::> } # http://design.perl6.org/S05.html#Backtracking_control (some of these implemented already, Larry says he plans to do more this year)

Fwiw you're missing a lot of colon-pair syntax variations too, eg:
say (:1day) # day => 1
say (:!foo) # foo => False
my @foo=1,2; say (:@foo) # foo => 1,2
my @foo=1,2; say (:@foo) # foo => 1,2
say :16("dead") # 57005

:)

-- raiph 2016-01-21 05:03 UTC

A quick scan of some docs reminds me of:

class :: is Int {...} # :: stands for an anonymous class

alternative to --foo passed on command line:

perl6 -e 'sub MAIN (:$foo) { say $foo }'

And here's something I didn't already know:

binding pair in sig:

my $a;
sub b (:foo($a)! is rw) { $a = 42};
b(:foo($a));
say $a # 42

And then there's all the specific uses of longnames like:

use Foo:from;

-- raiph 2016-01-21 05:50 UTC

Another one:

say so "a" ~~ /<>/ # Unicode character classes

-- raiph 2016-01-21 08:27 UTC

How about the alternative method calling syntax;
@measurements.map: { check_accuracy($); fail if $ < 0 }

-- Marty 2016-03-01 10:44 UTC

Greetings Marty -- that last bit is covered as "Precedence dropper" in the misc section.

-- awwaiid 2016-03-06 03:43 UTC

The compile-time variable ::?CLASS.

E.g. the following are equivalent:

class TreeNode { has TreeNode @children; }
class TreeNode { has ::?CLASS @children; }

-- smls 2016-08-26 08:30 UTC

That is a bizzaro variable.

-- awwaiid 2016-09-05 00:45 UTC

Considering you can create your own slangs that mutate the language grammar... I'd say the number of colon uses is infinite.

-- Zoffix 2017-07-22 14:39 UTC

Zoffix -- I think that is cheating a bit. I guess I'm looking more at the "core" language, assuming there is such a thing :)

-- awwaiid 2017-07-22 15:37 UTC