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# This Perl 5 exporting code...
require Exporter;
...

# ...becomes this in Perl 6:
sub foo(...) is export {...}

# Perl 5
sub get_foo {
...
$obj.foo = "...";
# Notice: Standard assignment syntax!
# Assignments should look line assingments, not like method calls

has $.foo is rw;

subtype OddInt of Int where { $^n % 2 == 1 }
has OddInt $.foo is rw;
# And then:
$obj.foo = 12; # will die (at compile-time!)