in reply to Re^4: Reflections on “Higher Order Perl” §1.1
in thread Reflections on “Higher Order Perl” §1.1

That's the theory, but for practical reasons (not giving Jonathan a thundering apoplexy, for instance), parameters are currently restricted to a single constraint in front, and will continue to be restricted until we get more experience with the sorting of multiple dispatch candidates using multiple constraints. See the note in S12, "Multiple constraints".
  • Comment on Re^5: Reflections on “Higher Order Perl” §1.1

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Re^6: Reflections on “Higher Order Perl” §1.1
by John M. Dlugosz (Monsignor) on Jun 15, 2009 at 14:29 UTC
    So chalk it up as "implementation limitation",
    and beware of any rules concerning multiple constraints as they are subject to change.

    "Single constraint" means not combining junctions and subsets?

    —John

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