sarat1669
I have a module which defines a behavior
defmodule Light.Trigger do
@callback initialize(%{}) :: {:ok, any()}
defmacro __using__(_) do
quote do
use GenServer
@behaviour Light.Trigger
...
end
end
And I am using it like
defmodule Light.Test do
use Light.Trigger
@impl true
def initialize(state) do
{:ok, state}
end
@impl true
def handle_info(:test, state) do
...
{:noreply, state}
end
end
This happens
iex> Light.Test.module_info[:attributes][:behaviour]
[GenServer]
But it should be
iex> Light.Test.module_info[:attributes][:behaviour]
[GenServer, Trigger]
right?
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sarat1669
On further inspection:
John-Goff
You can use Keyword — Elixir v1.20.2 to get the list that you want.
hauleth
1.Use more idiomatic
mod.module_info(:attributes).2. It will mention only behaviours set via module attribute (you do not need to set that to implement behaviour). So there is no “100% correct” solution to list all implemented behaviours.
sarat1669
Is there a case where, the
behaviourin module_info is a returned as a list with multiple behaviours? If not, should this be treated as a bug?eksperimental
It should not really matter whether it accepts a list or not (it does not FYI).
This is the way attributes work with accumulate
true.bit4bit
see model_info i think it’s work as expected: