Explanation of checking if value implements interface

Question

I\'ve read \"Effective Go\" and other Q&As like this: golang interface compliance compile type check , but nonetheless I can\'t understand properly how to use this techn

Answer 1

It is also possible to use Implements(u Type) bool method of reflect.Type in the following way:

package main

import (
    "reflect"
)

type Somether interface {
    Method() bool
}

type MyType string

func (mt MyType) Method() bool {
    return true
}

func main() {

    inter := reflect.TypeOf((*Somether)(nil)).Elem()

    if reflect.TypeOf(MyType("")).Implements(inter) {
        print("implements")
    } else {
        print("doesn't")
    }
}

You can read more on that in the documentation.