[Go] gocron源码阅读-go语言的结构体

结构体类型 type 名字 struct{},下面这段是github.com/urfave/cli包里的代码,声明了一个app的结构体类型

type app struct {
    // the name of the program. defaults to path.base(os.args[0])
    name string
    // full name of command for help, defaults to name
    helpname string
    // description of the program.
    usage string
    // text to override the usage section of help
    usagetext string
    // description of the program argument format.
    argsusage string
    // version of the program
    version string
    // description of the program
    description string
    // list of commands to execute
    commands []*command
    // list of flags to parse
    flags []flag
}

 

点操作符也可以和指向结构体的指针一起工作,如果赋给的是个指针,那也可以直接用点来操作
type user struct{
name string
}
user:=&user{name:"taoshihan"}
fmt.println(user.name)

cliapp := cli.newapp()
cliapp.name = "gocron"
cliapp.usage = "gocron service"
这个cli包下的newapp方法返回的是*app类型,因此cliapp就是可以直接点操作里面的成员了

    return &app{
        name:         filepath.base(os.args[0]),
        helpname:     filepath.base(os.args[0]),
        usage:        "a new cli application",
        usagetext:    "",
        version:      "0.0.0",
        bashcomplete: defaultappcomplete,
        action:       helpcommand.action,
        compiled:     compiletime(),
        writer:       os.stdout,
    }