The questions below refer to the gist at https://gist.github.com/336674/9ab832a86d203731c6379404d20afded79fe5f5b
and to protocols in general:
(1) Clojure automatically types hints the first argument when
extending a protocol to an interface or class, which is great. But you
cannot override this with your own type hint. Wanting to do this would
be very unusual, but see the RandomAccess/List case in the example
where one interface signifies the performance characteristics but a
different interface has the methods you want. Should it be possible to
override the type hint?
(2) The code for chop is repeated across multiple classes. What is the
idiomatic way to DRY this? Should I drop down to using raw extend with
maps, or is there more mixin support to come?
(3) The code for slice is also repeated, but only for one arity. Does
that change the answer to #2?
(4) Extending to two different interfaces that a single class
implements results in one class winning arbitrarily (e.g.
IPersistentVector/RandomAccess). This should also be a fairly unusual
case, but is there any plan for specifying precedence?
(5) It appears that the overhead for calling a protocol adds a hash
lookup (find-protocol-method) over the method invocation itself. Is
that the right way to summarize the performance implications?
Thanks,
Stu
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