Go中的闭包

比如：

var name = "abc"
go func(){
    fmt.Println(name)
}()

保存到func.go

package main

import (
    "fmt"
)

func Func() (func(), func()) {
    i := 10
    return func() {
            i++
        }, func() {
            fmt.Println(i)
        }
}

func main() {
    Add, Print := Func()

    for i := 0; i < 10; i++ {
        Add()
    }   

    Print()
}

使用go build -gcflags -m ./func.go可以看到这样的信息

# command-line-arguments
./func.go:9: can inline func·001
./func.go:9: func literal escapes to heap
./func.go:8: moved to heap: i            ->显示会将闭包函数所引用的空间移到堆中。避免以后的闭包调用找不到目标。
./func.go:10: &i escapes to heap
./func.go:11: func literal escapes to heap
./func.go:12: &i escapes to heap
./func.go:12: func·002 ... argument does not escape

这设么破格式。忘了markdown了。

package main

import (
    "fmt"
)

func Func() (func(), func()) {
    i := 10
    return func() {
            i++
        }, func() {
            fmt.Println(i)
        }
}

func main() {
    Add, Print := Func()

    for i := 0; i < 10; i++ {
        Add()
    }

    Print()
}

使用go build -gcflags -m ./func.go可以看到这样的信息

# command-line-arguments
./func.go:9: can inline func·001
./func.go:9: func literal escapes to heap
./func.go:8: moved to heap: i  ->显示会将闭包函数所引用的空间移到堆中。避免以后的闭包调用找不到目标。
./func.go:10: &i escapes to heap
./func.go:11: func literal escapes to heap
./func.go:12: &i escapes to heap
./func.go:12: func·002 ... argument does not escape