Clojurians Log v2

clj -Sdeps '{:deps {org.clojure/core.async {:git/sha "d922995579ce50f0760cbfc781f1e4a6ea077ce1" :git/url ""}}}'
Clojure 1.12.0
user=> (require '[clojure.core.async.flow :as flow])
nil

user=> (flow/create-flow {:procs
                          {:my-proc (flow/process
                                     (fn
                                       ([] {:outs {:nums ""}})
                                       ([_ _ _] [])))}})

Execution error (IllegalArgumentException) at clojure.core.async.flow.spi/eval9490$fn$G (spi.clj:11).
No implementation of method: :describe of protocol: #'clojure.core.async.flow.spi/ProcLauncher found for class: nil

it is confusing that the error says the describe isn't found while the zero arity is being provided

I’ll take a look at this today

great, the issue is still valid but my previous example is wrong, forgot the :proc keyword, this is the corrected one :

clj -Sdeps '{:deps {org.clojure/core.async {:git/sha "d922995579ce50f0760cbfc781f1e4a6ea077ce1" :git/url ""}}}'
Clojure 1.12.0
user=> (require '[clojure.core.async.flow :as flow])
nil
user=> (flow/start
 (flow/create-flow {:procs
                    {:my-proc {:proc (flow/process
                                      (fn
                                        ([] {:outs {:nums ""}})
                                        ([_ _ _] [nil []])))}}}))
Execution error (ArityException) at clojure.core.async.flow.impl$proc$reify__9924/start (impl.clj:258).
Wrong number of args (1) passed to: user/eval9998/fn--9999

I ran into this myself a couple days ago, hadn't gotten around to looking at it yet

you need all the arities 0...3

yeah, that works, but then it doesn't match the documentation

the intent was to not need all the arities