Kuidas näidata kompilaatorile, et konkreetne klass implementeerib teatud liidest?

In Go, interface implementation occurs implicitly: if a type implements all the methods of an interface, it is automatically considered to implement that interface. There is no need to explicitly specify this.

Example:

package main

import "fmt"

type Speaker interface {
    Speak() string
}

type Dog struct {}

func (d Dog) Speak() string {
    return "Woof!"
}

func main() {
    var s Speaker
    d := Dog{}
    s = d // Dog implements the Speaker interface
    fmt.Println(s.Speak())
}

If you want to explicitly check whether a type implements an interface, you can use a compile-time check:

var _ Speaker = (*Dog)(nil) // The compiler will check if *Dog implements Speaker

Thus, in Go, interfaces are implemented automatically when the required methods are present.