In other words, a code ref on the LHS will be treated the same as any other scalar. It's actually redundant with the previous phrase.
I don't think that it really is. UPDATE: Oops, but I'm wrong, because I misremembered the original sentence. The remainder of the post is now preserved only for posterity.

A commutativity breakage means that there are some circumstances in which the smart match depends on order, not that the smart match is always completely determined by the right-hand member. Indeed, for example, a smatch $scalar ~~ \%hash behaves differently when $scalar happens to be a hashref or arrayref from the way it behaves for coderefs. I think there's nothing about the phrase “commutativity breakage” to indicate this, so it needs to be made explicit in the following sentence (or elsewhere).

In reply to Re^3: Perl 5.11.0 now available by JadeNB
in thread Perl 5.11.0 now available by Anonymous Monk

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