Nicest way to emulate function decorators?

Questions / Help
2

I’d probably just make something that the user could use just via:

defmodule SomeUserModule do
  use Instrumented,
    funs [
      (:hello, 0)
      ]

  def hello, do: "world"

  # .. lots of more functions
end

In your use you can hook all the functions that are listed by the tuple of the funName and funArity and use a macro to hook the def’s and instrument the ones that match the list. That seems like the easiest way to hook that. Could do an :all or so for the funs to say to do everything

Or you could do something like this if you want to mark ‘at’ the function site:

defmodule SomeUserModule do
  use Instrumented

  @instrumented
  def hello, do: "world"

  # .. lots of more functions
end

Where that would basically do the same thing but you’d walk the ast looking for that attribute than an immediately following function declaration or so.

It would be entirely possible for someone to make a generic ‘function decorator’ macro module that works like that, could do things like @decorate SomeModule.functionWrapper or so before the functions. Unsure if anyone’s made one yet, but eh?

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