How to Create a Generic Type for a Pointer Implementing an Interface in Go?

Generic Type for a Pointer Implementing an Interface

When working with interfaces in Go, it may be necessary to pass in a pointer to a struct that implements the interface. This can be challenging when defining generic functions.

Question:

How can I create a generic type for a pointer that implements an interface?

Answer:

Option 1: Modify the Interface Definition

1. Declare the interface with a type parameter to specify that its implementing type must be a pointer to its type parameter:

2. Modify the handler's signature:

Option 2: Wrap the Interface (If Modifying Definition is Not Possible)

1. Create a wrapper interface that embeds the original interface and adds a pointer to its type parameter:

2. Modify the handler's signature to accept the wrapped interface:

Usage:

Both options allow passing a pointer to a struct that implements the A interface to the generic function Handler. For example:

The above is the detailed content of How to Create a Generic Type for a Pointer Implementing an Interface in Go?. For more information, please follow other related articles on the PHP Chinese website!