package main

import (
	"fmt"
	"log"
	"strconv"
)

type errConsumer struct {
	err error
}

func (e *errConsumer) Consume(err error) {
	if e.err == nil && err != nil {
		e.err = err
	}
}

func main() {
	var e errConsumer

	a, err := strconv.Atoi("123")
	e.Consume(err)
	b, err := strconv.Atoi("234a")
	e.Consume(err)
	c, err := strconv.Atoi("345")
	e.Consume(err)
	
	if e.err != nil {
		log.Fatal(e.err)
	}
	fmt.Println("Hello, playground", a, b, c)
}