package main

import (
	"log"
)

var res int
var err error

type FuncResult func() (int, error)
/*

func funcWithError(f chan FuncResult) {
	f <- (func() (int, error) { return 123, nil })
}

func main() {
	r := make(chan FuncResult)
	//...
}
*/


func funcWithError(f chan FuncResult) {
	f <- (func() (int, error) { return 123, nil })
}

func blah() (int, error) {
	log.Println("Ran blah()")
	return 21, nil
}

func main() {
	// r := make(chan func() (int, error))
	r := make(chan FuncResult)
	go funcWithError(r)
	res, err = (<-r)()
	if err == nil {
		log.Printf("My result is %d again!", res)
	} else {
		log.Printf("The func returned an error: %s", err)
	}

	/*
	r <= blah
	if err == nil {
		log.Printf("My result is %d again!", res)
	} else {
		log.Printf("The func returned an error: %s", err)
	}
	*/
}