Feature: Access to fully qualified functions

[marcandre]

What do you want Credo to do?

There's no easy way currently to know to know what function calls really are. The AST for foo(42) does not tell us which imported module's foo will be called, but from the compiled code it is, at least in theory, possible to know. Same for SomeModule.foo(42), we do not know that SomeModule is an alias for.

Given a particular call tuple, it would be nice to be able to ask Credo which function this actually is and get [:MyApp, :MyNamespace, :SomeModule]