DaAnalyst
The following is a snippet depicting my use case:
defmodule Abstract do
@callback foo() :: binary()
defmacro __using__( _) do
quote do
@behavior Abstract
@impl true
def foo() do
raise RuntimeError, "shouldn't have been invoked!"
end
defoverridable Abstract
end
end
end
defmodule SpecificA do
use Abstract
end
defmodule SpecificB do
use Abstract
@impl true
def foo() do
"foo"
end
end
The problem is dialyzer keeps on showing this warning that foo/0 default implementation in SpecificA “has no local return”. Even if I change the callback return value to binary() | no_return(), it still gives the same warning.
Any ideas on how to circumvent the dialyzer warning without providing a dummy implementation of the foo/0 in SpecificA?
Thanks
Trending in Questions
I’m working on a project that simulates the bumbl example in the programming phoenix book. It acts almost like an email client. We have a...
New
Hello,
I know there is an approach for handling lists that allows for optimized traversal, but I can’t recall the specific method (somet...
New
I’m seeing that a list inside a Kino.DataTable will be interpreted as a charlist, even if the Kino.configure() is set to charlists: :as_l...
New
So my question is quite simple and i have found no conclusive answer on forum, google or AI.
Should we use :erlang.float for Integer to ...
New
Hi, I’ve just set up an application with ash_authentication. There is only magic link strategy for now, so there is no confirmation add o...
New
If a change or preparation module uses Ash.Changeset.get_argument/2 or Ash.Query.get_argument/2 (or any of the other get_argument functio...
New
Documentation
While reading the Scoped Routes section, I noticed that the documentation currently refers to a problem without explainin...
New
Other Trending Topics
I am happy to introduce the very α version of the new programming language compiled to BEAM.
Welcome Cure.
It has literally three kille...
New
Hi there! We created Gust: A task orchestrator inspired by Airflow.
For those who have never heard about Aiflow, it’s a Python-based wor...
New
Beam Bots (or just BB for short) is a framework for building fault-tolerant robotics applications in Elixir using familiar OTP patterns. ...
New
Xamal is a deployment tool for Elixir apps that deploys native releases to bare metal servers over SSH. It’s a port of GitHub - basecamp/...
New
Corex is an accessible, unstyled UI component library for Phoenix that integrates Zag.js state machines using Vanilla JavaScript and Live...
New
Aludel - LLM Evaluation Workbench
Aludel is an embeddable Phoenix LiveView dashboard for evaluating and comparing LLM prompts across mult...
New
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #ai
- #elixirconf-us
- #blog-post
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #hex
- #security
- #metaprogramming










Marked As Solved- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
josevalim
In your case, it is better to not provide a default implantation and either let the compile warn or mark the callback as optional.
Also Liked
al2o3cr
I believe this specific situation is the same as what motivates this code in
GenServer:https://github.com/elixir-lang/elixir/blob/d33e934021cefda220da4b1720e59e996a03aa52/lib/elixir/lib/gen_server.ex#L799-L802
rvirding
The basic reason is that
raisegenerates an error so the functionfoonever returns. Dialyzer recognises this.Last Post!
snofang
Applying the trick mentioned by @al2o3cr,
Dialyzer does not complain anymore:
Thank you