How to Effectively Name Interfaces in Go?

Interface Naming in Go

Naming conventions for interfaces in Go aim to provide clear and consistent names for types, receiver functions, and methods. For single-method interfaces, the convention is to use the verb of the method with the suffix "-er". For example, the interface for a type that supports reading would be named Reader.

In the provided example, the interface that defines the IsRole() and AssumeRole() methods could be named RoleChecker, RoleAssumer, or a combination such as RoleCheckerAssumer. These names clearly describe the purpose of the interface and the methods it defines.

For receiver functions, it is recommended to use short, one- or two-character names that reflect the receiver type. For example, the receiver of a method that operates on a Buffer could be named b, while the receiver of a method that operates on a serverHandler could be named sh. Avoid using generic names such as this or self, as they do not provide meaningful context.

Here are some additional considerations for interface naming in Go:

• For interfaces with multiple methods, choose a name that accurately describes the overall purpose of the interface, such as Conn for network connections or ResponseWriter for HTTP responses.
• Duplicated roles in a hierarchy should be verified during parsing.
• ServerSession is a suitable name for an interface that manages sessions, but ServerSessioner is not a good choice since "Sessioner" is not a meaningful verb. Session alone would be a more appropriate name.

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