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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...
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I have a macro that expands into a module definition. The use case is that we take a testcase defined in one elixir module (parent) and m...
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I want to model the following relationship:
A location has zero or one of multiple (currently 7) specifications (each specification is a...
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Last Three Year's Trending
I’ve forked an abondoned hex-package and continue to maintain it under a new name.
The old code-base does provide a macro that we call f...
New
I can dynamically define functions in a “loop” like this:
defmodule Foo do
for {f, i} <- [{:foo, "foo"}, {:bar, "bar"}] do
def ...
New
I’m working on a cool library (news about that in a few weeks :smiley:), and there’s no sugar coating this: I really want to use inherita...
New
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 am trying to define a macro that defines a render(assigns) function but the compiler keeps rejecting the sigil, claiming that no assign...
New
Hey y’all so i’m working on a project that takes in Ecto schema and generates JSONSchemas for them. Part of the project requires that the...
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I’m currently writing a specie of DSL and I’m trying to understand how can I escape an anonymous function in a module attribute. I’m not ...
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I wanted to create a way to “safely” evaluate a string containing Elixir code. The code in the string should not be allowed to use any fu...
New
Hi,
I’m trying to create some syntactic sugar through a macro. The basic function should look like the following:
f :name do
data.som...
New
Summary
I am currently trying to get a better understanding of elixir macros and in doing so encountered the section about dynamic querie...
New
Hello all,
I need to convert AST with possible long binary to string.
Macro.to_string() uses Inspect and Inspect has the printable_limi...
New
I’m trying to identify function calls. My current solution seems to be working, but I’m not sure what are the edge cases I should test fo...
New
I have a question regarding a code snippet from part 6 of a really great Macros guide by @sasajuric.
This question specifically ranges f...
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I’m trying to build a macro for edge definitions in a graph. How can I access parameters from the outer macro inside the inner macro?
T...
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Hello, I am developing a macro to create nested struct in a module or (module → module …), I took the original code from this repo, becau...
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Trending Over Three Years
Currently I am writing a small macro which adds authorization functionality to a function. Rewrite ‘def’ to ‘defprot’ and add the rules t...
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This is a bit of a “strange” question but please bare with me; I expect it will be useful/insightful to others learning Elixir/Phoenix wa...
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Hi,
I am writing the Elixir integration for AppSignal, an application metrics solution. As of such, I am looking for a way to decorate f...
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In a macro, can you access a module attribute outside quote?. I know about Module.get_attributes/2 but I can only get it to work inside ...
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Do you think theres a way to write a function that matches a list of patterns with a list of values ignoring order? We use UXID and inser...
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Hi,
When writing the following code, elixir correctly and thankfully warns that there is a conflict:
function/macro 1:
defmacro static...
New
Hi community!
What is the correct way to implement the __using__ macro with an option that changes the way generated functions behave? O...
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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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Certain kinds of algorithms can be sped up (or even: are only possible) by using cyclic data structures.
Functional languages make it ha...
New
I’m trying to do something similar to wath ecto does when defining schemas. Basically the idea is:
defmodule Test do
use TableBuilder
...
New
Hi.
I am making a library for user submitted templates (so users can customize email content). I have a parser which parses the template...
New
I’m trying to implement a conceptual test with the following macro. I want to be able to pass an action argument which will call a funct...
New
In iex, this I can do this:
quote do
unquote(%{})
end
And get the expected:
%{}
But for some reason, in the macro I’m working on...
New
I’m using the __using__ macro to define some boilerplate code. One of the functions defined in the macro is a different arity of a functi...
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Hi,
I’m writing a service in which each transaction starts with the system returning a “catalog” of available products to each caller/cl...
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