golang control flow in a linked list based on element type using type assertion

typeflow.go

// go control flow in a linked list based on element type using type assertion
package main

import (
	"fmt"
	"reflect"
	"container/list"
)

type Foo struct {
	x, y string
}

type Bar struct {
	a, b int
}

func main() {

	l := list.New()
	
	l.PushBack(Foo{"hello", "there"})
	l.PushBack(Bar{1, 2})
	
	for e := l.Front(); e != nil; e = e.Next() {
	
		fmt.Println("iterating type:", reflect.TypeOf(e.Value))
		
		// we only go here if the element has type main.Foo
		v, ok := e.Value.(Foo)
		if ok {
			fmt.Println("type conditional value access:", v.x, v.y)
		}
	}
}

// Output:
// iterating type: main.Foo
// type conditional value access: hello there
// iterating type: main.Bar