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Hi there,
After reading @ericmj response here (Using unquote outside of quote block - #6 by ericmj) about “unquote fragments”, I still c...
New
In Phoenix apps, the web module provides this “re-dispatch into methods” technique for use (see __using__):
defmodule ExampleWeb.Router ...
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Last Three Year's Trending
I can’t seem to pass an anonymous function as an option to a Plug. I am using plug_hmouse which from the documentation takes an option di...
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Can Elixir code detect whether it is executing at compile time? I would like to write something like the following macro:
defmacro foo()...
New
I know this has been asked before, but I still can’t get it to work. I have code like this…
def case_stmt(input) do
[c1, c2, c3, c4] =...
New
I would like to add a function to my project that is available throughout all modules without aliasing/importing it. How should I go abou...
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I’m trying to build a protocol and a test suite to implement different adapters (impls of the protocol).
I tried to use a CaseTemplate, ...
New
I am trying to hook into the @doc deprecated: "message" annotation using __on_definition__.
defmodule ExampleCompiler do
def __on_defi...
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I’m developing a Supabase client for Elixir with complete support for all their services, like:
storage
auth
realtime
UI (live view)
S...
New
I’m doing some questionable meta-programming, and could use your help!
I’m using Macro.prewalk to traverse some source code, with the go...
New
I have a module utils,which is supposed to be used by MOdule A, B,C,D… and so on. The issue is utils modules have lot of constants, const...
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I’m not very used to macros/compile time manipulation, but I will explain what I want to achieve and would like to know if it’s possible ...
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I have a system that has thousands of run-time generated modules, some of which I want to cache for future reloading.
Ordinarily, the BE...
New
With the following code:
defmodule Foobar do
defmacro b(arg) do
arg
|> String.split("\n")
|> IO.inspect()
end
d...
New
I’m in the process of creating some reusable test modules using a macro:
defmodule SharedTestCase do
defmacro define_tests(do: block) ...
New
I have this weird behaviour with quoting n in iex. (1.14.3-otp25 on mac)
iex(1)> ast = quote(do: n)
{:n, [if_undefined: :apply, conte...
New
I’m trying to write a couple of mix format plugins for my project. So far I’ve been able to achieve most of what I want (e.g. rewriting f...
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Trending Over Three Years
Hi there,
How I can build queries with dynamic fields assignment in Ecto?
I try to do next thing:
import Ecto.Query
field = :id
value ...
New
Hi,
I have been coding with Elixir for 9+ months and I encountered several time the concept of quotes and each time, I think “ok, today ...
New
I have a bunch of functions in a module, that I’d like to dynamically add to a __using__ macro:
defmodule A do
defmacro __using__(_opt...
New
I’m improving some documentation in Elixir, and in order to do so, I need to dynamically build a list of atoms, but without using string...
New
Hi community!
What is the correct way to implement the __using__ macro with an option that changes the way generated functions behave? O...
New
Hi everyone, I was toying around with macros today and I reached a stagnation point. After trying multiple approaches I started to think ...
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I’m trying to do something similar to wath ecto does when defining schemas. Basically the idea is:
defmodule Test do
use TableBuilder
...
New
I have three identical methods in my module, that do (almost) exactly the same thing. Instead of repeating the function definitions, I am...
New
Elixir newbie here working on a stemmer for a document indexing engine. The stemming algorithm has dozens of steps with many tests per s...
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I’m struggling with overriding hygiene during manual manipulation of AST with Macro.postwalk. In short, I want to provide a syntax for in...
New
I want to programmatically generate input objects from introspecting my schema, but I can’t figure out the metaprogramming to do so.
Ess...
New
Hi all,
I’ve been playing with Specify lately and I’m trying to get the @type module attribute like the @doc one, so as to link to that ...
New
defmodule Bar do
@after_compile __MODULE__
defmacro __before_compile__(_env) do
IO.inspect("#{__MODULE__}.__before_compile__")
...
New
Easiest to ask this in code…
defmodule Foo do
use Tagger
tag(:red)
end
defmodule Bar do
use Tagger
tag(:blue)
end
Then at runt...
New
Hi, I looked about generating functions and found one example. I tried to make it work inside macro, but i don’t know how I can fix it. H...
New
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