Fix typespec

Author: k32

Makefile

@@ -53,4 +53,4 @@ $(CONCUERROR):
 	$(MAKE) -C _build/Concuerror/
 
 hex-publish: clean
-	rebar3 hex publish
+	rebar3 as dev hex publish

rebar.config

@@ -46,7 +46,10 @@
             , system_monitor
             ]}
           ]}
- , {dev, [{deps, [{system_monitor, "1.0.1"}, {redbug, "2.0.2"}]}]}
+ , {dev,
+    [ {deps, [{system_monitor, "1.0.1"}, {redbug, "2.0.2"}]}
+    , {plugins, [rebar3_hex]}
+    ]}
  , {concuerror,
     [{erl_opts, [ {d, 'CONCUERROR'}
                 , {d, 'HUT_IOFORMAT'}

src/framework/kflow_gen_mfd.erl

@@ -72,8 +72,7 @@
 
 -callback init(_Config) -> _State.
 
--callback mfd(kflow:offset(), _DataIn, _State) ->
-  {true, _DataOut} | false.
+-callback mfd(kflow:offset(), _DataIn, _State) -> return_type().
 
 -callback terminate(_State) -> _.