Dialyzer: suppress warning on a specific function

Maybe @dialyzer {:no_return, :"g/0"}, however, -dialyzer , an attribute in erlang may be not the same as @dialyzer , a module attribute in elixir.

If I recall correctly, its @dialyzer {:no_return, {:g, 0}}.

Right!

defmodule Myapp.Repo do
  use Ecto.Repo, otp_app: :myapp
  @dialyzer {:nowarn_function, rollback: 1}
end

from Phoenix Dialyxir Quickstart · jeremyjh/dialyxir Wiki · GitHub

So -dialyzer({no_return, g/0}). would probably become

@dialyzer {:no_return, g: 0}

Thank you both! That works perfectly.

I think this way is better, some function that calling the g/0 function also will be disabled

  @dialyzer {:noreturn_function, g: 0}

For posterity: you can also disable warnings for functions for third-party deps/modules:

@dialyzer {:nowarn_function, &MyXQL.rollback/2}
# somewhere later...
    {:error, res} =
      MyXQL.transaction(pid, fn conn ->
        MyXQL.query!(conn, statement, params)
        MyXQL.rollback(conn, :rolled_back)
      end)

Just in case somebody else keeps looping back into this thread looking for possible values for @dialyzer: Here’s the list.

https://github.com/elixir-lang/elixir/blob/1b0dff7e6a667b0aba73d2ee7982d854d80bee90/lib/elixir/lib/module.ex#L2352-L2363