Why Does Go Ditch Class Inheritance in Favor of Interfaces?

Why Go Does Not Embrace Class Inheritance

In contrast to many popular programming languages, Go notably lacks type inheritance, raising the question of why this fundamental concept is absent from its design.

Devouring Complexity in Favor of Simplicity

Go's creators explicitly addressed this matter in their FAQ:

"Object-oriented programming, in its traditional form, often involves intricate discussions of relationships between types. Go takes a different path."

Rather than explicitly declaring type relationships, Go enables types to automatically satisfy any interface that aligns with their methods. This approach simplifies development and eliminates the complexities of traditional multiple inheritance.

Embracing Interfaces for Versatility

Go's interfaces provide a flexible means of expressing conceptual relationships between types. Interfaces can specify a subset of methods, even with as few as zero methods. This lightweight approach allows for easy definition, addition, and testing of new concepts without modifying existing types.

No Hierarchies, More Freedom

Unlike languages with type inheritance, Go does not impose a fixed type hierarchy. This freedom removes the need for explicit type management and allows developers to focus on modeling relationships through interfaces.

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