Does golang structure have spread operator?

php editor Xigua will discuss a question about the Golang language in this article: whether there is an expansion operator for structures. As a modern programming language, Golang has many powerful features and functions, but in some specific scenarios, developers may encounter the need to extend the structure. This article will introduce in detail the knowledge related to structure expansion in Golang and give solutions. If you are interested in Golang’s structural spread operator, then please continue reading this article.

Question content

has the following structure, where postinput is the parameter of the createpost function.

type postinput struct {
  title string
  content string
}

type postinputwithtime struct {
 title string
 content string
 createdat time
 updatedat time
}

But don't want createdat and updatedat to be exposed to the user, so I added it to the function as shown below.

func createpost(input postinput) {
  updatedinput = postinputwithtime{
    title: input.title
    content: input.content
    createdat: time.now()
    updatedat: time.now()
  }
  db.insertone(updatedinput)
}

It works fine, but was curious if there is a more elegant way to do this? I know it's possible to embed a struct on top of another struct, but not on the root level (like the javascript spread operator).

// something like this
type PostInputWithTime struct {
 ...PostInput
 CreatedAt
 UpdatedAt
}

Solution

Is there a go[...] structure [...] spread operator like the javascript spread operator [...]?

No.

(You'd have to use embedding, copying values, or implementing some reflection-based magic, but no, there's no propagation.)

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