[Go言語] deferに関する実験 ref: http://qiita.com/tenntenn/items/9aebce917760f157c44e

file0.txt

package main

import "fmt"

func f() {
    defer fmt.Println("1")
    defer fmt.Println("2")
    defer fmt.Println("3")
}

func main() {
    f()
}

file1.txt

package main

import "fmt"

func f() {
    i := 0
    defer fmt.Printf("i is %d", i)
    i = 100
}

func main() {
    f()
}

file2.txt

package main

import "fmt"

func f() (ret int) {
    defer func(n int) {
        fmt.Println(n)
        fmt.Println(ret)
    }(ret) // retはゼロ値で初期化されている

    return 100
}

func main() {
    fmt.Println(f())
}

file3.txt

package main

import "fmt"

type Hoge struct {
    N int
}

func (h *Hoge) PrintN() {
    fmt.Println(h.N)
}

func f() {
    h := &Hoge{100}
    m := h.PrintN
    defer m()
    h.N = 200
}

func main() {
    f()
}