exporting a multi

export-multi.sh

$ cat A.pm
multi foo(Int) is export {
    say "Int";
}

multi foo(Str) {
    say "Str";
}

$ perl6 -I. -e 'use A; foo(42); foo("OH HAI")'
Int
Str

Hi, yes your example works but the problem is more complicated than that.

in script:

use dumper ;

# module dumper has a multi sub filter() ... matching Lists, Array, Int, Any
dump(<a b c>) ;
dump(42) ;

my SomeClass $x ; # with an arbitrary class, either defined in this context or that we get from some call

# without changing anything in SomeClass, I want to add a filter for it.
multi sub filter (Classes::SomeClass $o) { say "SomeClass specific filter" }

# This would use the default filter as module dumper has no idea about the filter we defined above 
do_filter($x) ;

# to be able to use the filter above I need to inject it in dumper namespace
# better yet, it needs to be injected in the instance of the dumper so different dumpers can have different filters, this becomes even more important if the dumpers are run in different threads.