An example of handling errors using a task list

example.go

package main

import (
    "errors"
    "fmt"
)

// Task represents a callable task to be executed
type Task func() error

// Work slice of consecutive tasks that each may or 
// may not have a single point of failure
type Work []Task

// Do the work
func (w Work) Do() (err error) {
    for _, t := range w {
        err = t()
        if err != nil {
            return
        }
    }
    return
}

func main() {
    work := Work{
        // task A
        func() (err error) {
            fmt.Println("A")
            return
        },
        // task B
        func() (err error) {
            fmt.Println("B")
            return
        },
        // task C
        func() (err error) {
            fmt.Println("C")
            err = errors.New("I don't know why, but Fail!")
            return
        },
        // task D
        func() (err error) {
            fmt.Println("D")
            return
        },
    }
    err := work.Do()
    if err != nil {
        fmt.Println(err.Error())
    }
}

// http://play.golang.org/p/TdABljnoPt