Hi Timothy,
I've picked case over cond/condp because I want a O(1) dispatch
rather than linear execution since there are many patterns [though I'm
probably guilty of premature optimization here].
I've currently been working around it via two techniques:
** Refactoring it into a function.
i.e.
(defn some-func [msg]
(hmatch msg ... )) ;; silly is called hmatch
(async/go
(loop [msg (<! some-chan)]
(some-func msg)
(recur (<! some-chan))))
** And when I can't refactor, due to needing to interact with other
parts of go, manually expand it, i.e.
(async/go
(loop [msg (<! some-chan)]
(case (:tag msg)
:dog (... some op involving some-chan))))
Please let us know when the next release of core.async is ready --
looking forward to it!
PS: I'm a big fan of your youtube tutorials. :-)
On Tue, Feb 18, 2014 at 12:42 PM, Timothy Baldridge
<tbaldri...@gmail.com> wrote:
> "When a macro expands to case inside of a go-block, it appears that
> the _ELSE_ clause of the case is always run. (Even after a previous
> clause has matched.)"
>
> Thanks, I'll get a test in the project for this, it'll probably be fixed in
> the next alpha release. Until then, cond or condp might work?
>
> Timothy
>
>
> On Tue, Feb 18, 2014 at 1:40 PM, t x <txrev...@gmail.com> wrote:
>>
>> @Thomas:
>> (this is completely unrelated to the actual bug)
>>
>> This particular code was "simplified" from a more complicated macro
>> -- where for the else clause, I want to capture the original value, so
>> it would be something like:
>>
>>
>> (silly obj
>> :dog dog-line
>> cat cat-line) ==>
>>
>> (case (:tag obj)
>> :dog dog-line
>> (let [cat obj] cat-line ))
>>
>> However, in "simplifying" the example, parts of the macro was
>> removed, and thus it appears that we have this dangling cat symbol.
>>
>>
>>
>>
>>
>> On Tue, Feb 18, 2014 at 12:09 PM, Thomas Heller <th.hel...@gmail.com>
>> wrote:
>> > Well, while case allows for symbols it still doesn't make sense to use
>> > it
>> > except :tag switches between keywords and symbols to. Apart from that
>> > cat
>> > "pat2" is never actually used.
>> >
>> > (defmacro silly [object pat1 body1 pat2 body2]
>> > `(case (:tag ~object)
>> > ~pat1 ~body1
>> > ~body2))
>> >
>> >
>> >
>> > But as Timothy said its probably related to case, so I'll shut up.
>> >
>> > On Tuesday, February 18, 2014 8:20:07 PM UTC+1, Ben wrote:
>> >>
>> >> On Tue, Feb 18, 2014 at 11:18 AM, Thomas Heller <th.h...@gmail.com>
>> >> wrote:
>> >>>
>> >>> While I haven't tested the code, I can see one "obvious" mistake.
>> >>>
>> >>> https://github.com/txrev319/bug-report/blob/master/src/app.cljx#L20
>> >>>
>> >>> "cat" is undefined?
>> >>>
>> >>
>> >> That isn't a mistake. `silly` expands into a case, which expects bare
>> >> symbols.
>> >>
>> >> --
>> >> Ben Wolfson
>> >> "Human kind has used its intelligence to vary the flavour of drinks,
>> >> which
>> >> may be sweet, aromatic, fermented or spirit-based. ... Family and
>> >> social
>> >> life also offer numerous other occasions to consume drinks for
>> >> pleasure."
>> >> [Larousse, "Drink" entry]
>> >>
>> > --
>> > You received this message because you are subscribed to the Google
>> > Groups "Clojure" group.
>> > To post to this group, send email to clojure@googlegroups.com
>> > Note that posts from new members are moderated - please be patient with
>> > your
>> > first post.
>> > To unsubscribe from this group, send email to
>> > clojure+unsubscr...@googlegroups.com
>> > For more options, visit this group at
>> > http://groups.google.com/group/clojure?hl=en
>> > ---
>> > You received this message because you are subscribed to the Google
>> > Groups
>> > "Clojure" group.
>> > To unsubscribe from this group and stop receiving emails from it, send
>> > an
>> > email to clojure+unsubscr...@googlegroups.com.
>> > For more options, visit https://groups.google.com/groups/opt_out.
>>
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clojure@googlegroups.com
>> Note that posts from new members are moderated - please be patient with
>> your first post.
>> To unsubscribe from this group, send email to
>> clojure+unsubscr...@googlegroups.com
>> For more options, visit this group at
>> http://groups.google.com/group/clojure?hl=en
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "Clojure" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to clojure+unsubscr...@googlegroups.com.
>> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>
>
> --
> "One of the main causes of the fall of the Roman Empire was that-lacking
> zero-they had no way to indicate successful termination of their C
> programs."
> (Robert Firth)
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with your
> first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
