There are better ways to do this over reading “yourself” and parsing the AST.
You can use @on_definition on a module (say A) to have it call a macro or function elsewhere (Say on B) whenever a function or macro is defined on the module. With a macro being provided you can then pull information from those definitions and store them in an arbitrary module attribute of A.
You can register another callback @before_compile in A, which calls the callback macro (likely also in B) right before the module starts compiling, but after all it’s body has been evaluated. That module can then read your arbitrary module attribute for all the gathered information and turn it into AST returned from the macro. That AST is then added to the module – you can imagine it being injected right before the end line of defmodule.
