去通道以空结构作为输入。 这个输入可以是什么吗？

Question

a := make(chan struct{})

Such this, go channel take empty struct as input. Can this input be anything?

thanks.

Answer 1

No: it can be an empty struct (struct{}{}), not "anything"

To be "anything", you would need interface{}.

As I explain in "Go Golang : anonymous struct and empty struct", an empty struct is useful to pass an object of size... 0! It is a good way to signal the completion that something has happened.