How to embed a function type (closure) into a struct in Go?

To embed a function type (closure) into a struct in Go, you can use a struct field with the function type.

Here's an example:

package main

import "fmt"

type MyStruct struct {
    MyFunc func(string) string
}

func main() {
    myStruct := MyStruct{
        MyFunc: func(val string) string {
            return "Hello, " + val
        },
    }

    result := myStruct.MyFunc("World")
    fmt.Println(result)
}

In the above code, the MyStruct struct has a field MyFunc of type func(string) string. This function type takes a string as input and returns a string.

In the main function, we create an instance of MyStruct and assign a closure as the value for MyFunc. The closure adds the input string to the prefix "Hello, ".

When we invoke myStruct.MyFunc("World"), it calls the embedded closure and returns the result "Hello, World" which is printed to the console.