How to implement method overloading in Go language

Method overloading is not supported in the Go language, but interface simulation can be used. Method overloading steps: 1. Create an interface containing all possible signatures; 2. Implement multiple methods with different signatures to implement the interface.

How to implement method overloading in Go language

Method overloading is a method that allows the use of methods with the same name but different signatures method situation. In the Go language, method overloading is not directly supported, but it can be simulated using interfaces.

Implementation

Create an interface with all possible signatures:

type MyInterface interface {
    Method1(args1 int)
    Method1(args1 float32)
}

Then, implement multiple methods with different signatures that implement the interface ：

type MyStruct struct {}

func (ms MyStruct) Method1(args1 int) {}
func (ms MyStruct) Method1(args1 float32) {}

Practical case

Consider a program that calculates area. It should be able to calculate the area of ​​rectangles and circles at the same time.

type Shape interface {
    Area() float32
}

type Rectangle struct {
    Width, Height float32
}

func (r Rectangle) Area() float32 {
    return r.Width * r.Height
}

type Circle struct {
    Radius float32
}

func (c Circle) Area() float32 {
    return math.Pi * c.Radius * c.Radius
}

func main() {
    shapes := []Shape{
        Rectangle{5, 10},
        Circle{5},
    }

    for _, shape := range shapes {
        fmt.Println(shape.Area())
    }
}

In this example, the Shape interface defines the method for calculating the area. The Rectangle and Circle structures both implement this interface, providing specific implementations for calculating the area of ​​their respective shapes.

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