How to overload golang methods?

Go allows method overloading in the same type through method sets, that is, defining multiple methods with the same name but different parameters. The method set must be included in the interface, the method names are the same, the parameter types are different, and the return value types can be the same or different. For example, the Point type can overload the Distance method, one that accepts another Point parameter, and one that accepts no parameters.

How to overload Go methods?

Overview

Go does not support method overloading in the traditional sense, that is, defining methods with the same name but different parameters in the same type. However, Go provides an alternative called method sets, which allow defining multiple methods with the same name but different parameters.

Syntax

To overload methods in Go, you can use the following syntax:

type TypeName interface {
    MethodName(param1Type param1Name, param2Type param2Name, ...)returnType
}

Practical Case

Let us consider an example that illustrates how to Point Overloaded Distance method in type.

type Point struct {
    x, y float64
}

func (p Point) Distance(q Point) float64 {
    return math.Sqrt(math.Pow(p.x-q.x, 2) + math.Pow(p.y-q.y, 2))
}

func (p Point) DistanceToOrigin() float64 {
    return math.Sqrt(math.Pow(p.x, 2) + math.Pow(p.y, 2))
}

In the example above, the Point type has two Distance methods: one that takes another Point parameter, and one that takes no parameters. The compiler differentiates based on the parameter types of methods, so we can use the same name for both methods.

Note

• The method set must be included in the interface.
• Method names must be the same.
• Method parameter types must be different.
• Method return value types can be the same or different.

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