编译器设计：存储函数签名的最佳方法？

Question

I am planning on storing all the function signatures which allows overloading. Right now I have a nested HashMap that looks something like this:

HashMap<String,HashMap<ArrayList<Type>,Object>>

Where the first key, String , contains the name of the function. The second key, ArrayList<Type> , contains parameter data types. Now, I know using ArrayList as a key is a terrible practice, so I wonder if there is a better solution to store the function signatures?

Answer 1

The design is fine. I ended up keeping this design.