guitcastro
How to use quote and unquoted parameters inside a quote block?
I am building a macro witch has two parameters, one of them I want to unquote and the other one no.
Example:
defmacro x(a, b) do
quote do
IO.inspect(unquote(a)) // should print 1
IO.inspect(b)// I want the ast [foo: {:^, [], [{:bar, [], Elixir}]}]
end
end
x(1, [foo: ^bar])
Most Liked
Qqwy
TypeCheck Core Team
The one you unquote you are already doing correctly.
To make sure you embed a quoted result into a quoted context, use Macro.escape/1.
So the snippet would become
quote do
IO.inspect(unquote(a))
IO.inspect(unquote(Macro.escape(b))
end
1
Popular in Questions
What is the proper way to load a module from a file in to IEX?
In the python world, doing something like this pretty standard:
from ....
New
I believe there are people here who are dealing with CSV files import on the daily basis, and since Excel is a really popular tool there ...
New
Good day to you all.
I have been struggling to get a query involving like and ilike to work.
Can anyone assist me on this, please?
pro...
New
Hi, I’m using Ubuntu 18.04 and after updating to OTP-24.0 yesterday i have this warning when I run “mix local.hex”:
14:57:30.512 [warn] ...
New
The Elixir Typespec docs show the following syntax for keyword lists in typespecs:
# ...
| [key: type] # keyword lis...
New
I am using Ecto timestamps with postgres, I can see the timestamps() use the :naive_dateime but for my use case I wanted to store the ti...
New
I’m currently trying to understand how to join three tables using Ecto. All the examples I’ve seen use 2, so maybe I’m just missing somet...
New
Hello, I have map which I want to convert it to string like this:
the map:
%{last_name: "tavakkoli", name: "shahryar"}
the string I ne...
New
I’m trying to make a websocket server in Phoenix or raw Elixir. I heard about gun, I think I could use cowboy, but since I’m not that sma...
New
Hi guys, nice to meet you to the whole forum, I’m new here, I’m trying to configure visual studio code for elixir, right now the intellis...
New
Other popular topics
Here are few pieces of (common) Linux knowledge that we use for reasonably small one server apps. We use Ubuntu but this should work for ...
New
In Ruby, I can go:
User.find_by(email: "foobar@email.com").update(email: "hello@email.com")
How can I do something similar in Elixir? ...
New
In the Dialyzer docs ( http://erlang.org/doc/man/dialyzer.html#requesting-or-suppressing-warnings-in-source-files ), there is a way to tu...
New
I have a server on AWS, and was running a load test using artillery. When looking at the Phoenix dashboard I see the Ports going to 100% ...
New
Hi all,
Trying to get some more clarity over utc_datetime and naive_datetime for Ecto:
https://hexdocs.pm/ecto/Ecto.Schema.html#module-...
New
I wanted to check elixir version in phoenix because i found that my elixir is 1.5 but when i use Enum.chunk_by it said the function is un...
New
Forgive me if this is obvious, but how does one delete a database record WITHOUT selecting it first? https://hexdocs.pm/ecto/Ecto.Repo.h...
New
Surface is an experimental library built on top of Phoenix LiveView and its new LiveComponent API that aims to provide a more declarative...
New
After calling mix ecto.create I get this error:
17:00:32.162 [error] GenServer #PID<0.412.0> terminating
** (Postgrex.Error) FATAL...
New
Hello guys,
I have finally made it. I created an admin interface for a framework. It’s been on my todo list for years and with the curre...
New
Latest on Elixir Forum
Sponsor Spotlight
Enabling companies to succeed by building software people love.
Categories:
Sub Categories:
Forums
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.
Develop your skills with books, videos, and courses.
Producing high quality Elixir screencasts since 2017.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"