DaAnalyst
On several occasions I’ve had this need to implement a Protocol for all modules implementing one other particular Protocol e.g.
defimpl Viewable, for: Doable do
..
end
One could argue to merge the two protocols into one, but in those few particular cases it is not applicable over the separation of concerns, as the protocols themselves are defined in two completely separate parts of the application and their respective implementations are more like two different behavioral aspects than just the protocols (i.e. they are not just wrapping the function calls to the structure modules but providing some additional behavior as well).
Any thoughts?
Where Next?
Trending in Discussions
Other Trending Topics
Chat & Discussions>Discussions
Latest on Elixir Forum
Sponsor Spotlight
Practical resources that improve the lives of professional developers.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #blog-post
- #phoenix_html
- #ai
- #iex
- #graphql
- #elixirconf-us
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #hex
- #security
- #metaprogramming
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Practical resources that improve the lives of professional developers.
Develop your skills with books, videos, and courses.
Producing high quality Elixir screencasts since 2017.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 2- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
benwilson512
You can sort of achieve this by having the
Viewableprotocolfallback_to_anyand then in theanyclause check to see if the item provided implements Doable.DaAnalyst
True, but it’s not exactly the same thing as then you also need to raise if the protocol is not implemented i.e. you’re adding some boilerplate on case by case basis. Otherwise, this can also be implemented as a macro but that’s exactly my point here. The then/2 macro used to be implemented manually by different names and by different developers until it’s become an integral part of Elixir. My point here is why not add this one as well?