What is the difficulty of applying SOLID principles in the Go language?

The complexity of applying SOLID principles in the Go language is related to its features and philosophy:

• Lack of class inheritance: Go does not support traditional OOP inheritance, which complicates the implementation of the Liskov Substitution (L) and Open/Closed (O) principles through inheritance. Instead, composition and interfaces are used.

• Implicit interfaces: In Go, interfaces are implemented implicitly, which facilitates adherence to the Dependency Inversion (D) principle but requires careful design to avoid creating overly general or overly specific interfaces.

• Simplicity and minimalism: Go aims for simplicity, so some SOLID principles may seem redundant or complex to apply without overly complicating the code.

• Lack of generics (until recent versions): Without generics, it is difficult to implement certain abstractions, affecting the application of the Open/Closed principle.

As a result, in Go, composition and interfaces are often used to achieve flexibility and extensibility, adapting SOLID to the language's idioms rather than following them literally.