That depends on which part of the problem you're talking about. It would be easy to define a dialect of Perl 6 that allowed this, but there is as of yet no standard path notation other than 
    %hash«Foo»«Bar»«Baz»

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If I were going to make a dialect, I'd probably throw in a 
    use supersubscripts;

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which would let me write 
    %hash«Foo/Bar/Baz»

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instead to mean the same thing. But it's not clear that something like that should be inflicted on everyone unless the syntax were less likely to be confusing to someone who really means 
    %hash{'Foo/Bar/Baz'}

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to mean a single key with slashes in it. It would need a more distinctive prefix if we were to build it in, and unfortunately we're really low on bracket characters, even with the addition of «», which we've already found lots of uses for. (Some would say too many... :-)

So the answer to your question is probably "no" for now...

In reply to Re^2: Dotted hash access by TimToady
in thread Dotted hash access by sfink

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