Why Can't Go Use Short Variable Declarations at the Package Level?

Variables at Package Level in Go: The Curious Case of Short Declaration

In Go, while defining variables within a function, you can use short declarations such as:

func main() {
  a := 3
}

However, when it comes to the package level, these short declarations are prohibited. Why is this the case?

Firstly, it ensures the clarity of the code. Each declaration at the package level starts with a keyword, which provides explicit information about the type of variable being declared. For instance:

var a int

Such declarations make the intent of the code clear at a glance.

Secondly, this distinction simplifies parsing. By imposing a strict distinction between short and regular declarations, the Go compiler can effortlessly identify the type of declaration and its syntax. This makes the parsing process more streamlined and efficient.

The above is the detailed content of Why Can't Go Use Short Variable Declarations at the Package Level?. For more information, please follow other related articles on the PHP Chinese website!