You must remove the = here. This is a common mistake I do all the time 
I agree with @LostKobrakai , you don’t need macros here as you are not creating code by generating AST.
You should create a helper module specialized in reading your CSVs with all the required variations and parameters.
Those functions will be available at runtime, obviously. Then, in your main module you would you can also call the functions at compile time.require this helper module, so
