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pmichaud/gist:5771173

Created June 13, 2013 04:08
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pmichaud@kiwi:~/p6/rakudo$ ./perl6
> my $h = Hash[Str,Int].new;
().hash
> $h{3} = 'hello'; # okay
hello
> $h{'hello'} = 'hello'; # fails key check
Nominal type check failed for parameter 'key'; expected Int but got Str instead
> $h{4} = 15; # fails value check
Type check failed in assignment to '$v'; expected 'Str' but got 'Int'
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