Pointers to Interfaces

You almost never need a pointer to an interface. You should be passinginterfaces as values—the underlying data can still be a pointer.

An interface is two fields:

• A pointer to some type-specific information. You can think of this as"type."
• Data pointer. If the data stored is a pointer, it’s stored directly. Ifthe data stored is a value, then a pointer to the value is stored.If you want interface methods to modify the underlying data, you must use apointer.