What are the Benefits of Using an Empty Struct in Go?

Uses of an Empty Struct Type in Go

Often in Go, it's beneficial to create a type with an empty struct syntax:

type FrontierSigner struct{}

Benefits of an Empty Struct:

1. Minimal Size: Empty structs are the smallest building block in Go, with a size of 0 bytes. This allows for efficient storage in slices and channels.
2. Shared Memory Location: All pointers to empty structs always reference the same memory location, enabling efficient communication.
3. Fast Notifications: In channels, empty structs provide a non-blocking way to signal events without data. This is more efficient than using booleans.
4. Method Containers: Empty structs can be used as containers for methods in mocking or testing scenarios.
5. Set Implementation: Maps with key-value pairs as map[keyType]struct{} act as simple sets. This avoids storing values while retaining keys.
6. Interface Implementation: An empty struct can serve as the receiving type for interface methods, simplifying test cases and mock objects.

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