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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 can dynamically define functions in a “loop” like this:
defmodule Foo do
for {f, i} <- [{:foo, "foo"}, {:bar, "bar"}] do
def ...
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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
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 am trying to define a macro that defines a render(assigns) function but the compiler keeps rejecting the sigil, claiming that no assign...
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Summary
I am currently trying to get a better understanding of elixir macros and in doing so encountered the section about dynamic querie...
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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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Hello all,
I need to convert AST with possible long binary to string.
Macro.to_string() uses Inspect and Inspect has the printable_limi...
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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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I’m trying to implement template fragments in EEx. My extremely rough draft lets you create a template file that looks like this:
<%|...
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Hi!
I have a piece of code that parses some json and creates validations from them. In one place, I need to create a regular expression ...
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I go through bouts of playing around with re-writing source-code using Sourceror. It generally goes: I learn a whole bunch, start gettin...
New
Summary
I’m trying to create a macro that takes in input a module name and automatically creates a defdelegate for each function defined ...
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I was writing a macro for injecting internationalised routes into MyAppWeb.Router.
When using the Gettext macros, in contrast to the Get...
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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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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...
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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...
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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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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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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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