conf.FillDefault() Merge existing values

[yangjinheng]

	c := rest.RestConf{
		ServiceConf: service.ServiceConf{
			Name: "foo",
			Log: logx.LogConf{
				Encoding: "plain",
			},
		},
		Host: "127.0.0.1",
		Port: 443,
	}

	err := conf.FillDefault(&c)
	fmt.Println(err)
	fmt.Println(c.Name)
	fmt.Println(c.Host)
	fmt.Println(c.Port)
	fmt.Println(c.Mode)
	fmt.Println(c.Log.Encoding)
	fmt.Println(c.Log.Mode)

output

set the default value, "Name" must be zero
foo
127.0.0.1
443

plain

Merge existing ones instead of throwing an exception

”set the default value, "Name" must be zero“

[kevwan]

FillDefault first, then set the specific values.

[yangjinheng]

ok!