将两个同名的结构嵌入到结构中

Question

How do you embed two types of the same name in a struct? For instance:

type datastore {
    *sql.Store
    *file.Store
}

Results in duplicate field Store. I know this makes sense, since you wouldn't be able to refer to the embedded field ds.Store but how do you accomplish this anyway?

To clarify, I want to implement an interface with datastore. For that both structs are needed as their methods complement each other to create the interface. What alterantives do I have?

Answer 1

Use a type alias, example:

type sqlStore = sql.Store // this is a type alias

type datastore {
    *sqlStore
    *file.Store
}

A type alias doesn’t create a new distinct type different from the type it’s created from. It just introduces an alias name sqlStore, an alternate spelling, for the type denoted by sql.Store.