golang-structs-interfaces

Go structs with zero-value safety work correctly without explicit constructors by applying lazy initialization, preventing runtime errors caused by improper default states. This design pattern ensures your types remain robust even when instantiated directly.

The best way to structure Go interfaces for dependency injection is to keep them small, define them where consumed, and accept interfaces while returning concrete structs. This approach maximizes testability and minimizes unnecessary complexity.

Use type embedding in Go structs when you need method promotion and composition, but use named fields when explicit access control is required. Proper embedding guidance helps avoid unexpected method shadowing and promotes cleaner type design.

Verify Go interface implementation at compile time by adding a compile-time interface check assertion in your code. This technique ensures your concrete types satisfy required contracts before runtime, catching missing methods early during the build process.

Choose between pointer and value receivers for Go struct methods based on whether you need to mutate state or ensure method consistency across the type. Pointer receivers allow modification and avoid copying large structs, while value receivers provide immutability.