What't the means about var () in golang

Question

I go though the code generated by go-swagger, found follow code:

// NewReceiveLearningLabActsParams creates a new ReceiveLearningLabActsParams object
// with the default values initialized.
func NewReceiveLearningLabActsParams() ReceiveLearningLabActsParams {
    var ()
    return ReceiveLearningLabActsParams{}
}

I noticed here:

var ()

I totally not understand what's the means, could anyone help me understand this code? thanks

Well, that is an empty var declaration block (autogenerated). — Volker, Feb 16 '17 at 06:02
yes, is only confusing ... if block have more that one argument it could be var (a int, b string), with just one argument "var (a int)", but with zero argument this special case — lofcek, Feb 16 '17 at 08:33

score 47 · Accepted Answer · answered Feb 16 '17 at 12:14

In Go this is a shorthand for defining variables in bulk. Instead of having to write var in front of every variable declaration, you can use a var declaration block.

For example:

var (
    a,b,c string = "this ", "is ","it "
    e,f,g int = 1, 2, 3
)

is the same as

var a,b,c string = "this ", "is ","it "
var d,e,f int = 1, 2, 3

The var () in your code example simply states that no variables were declared.

Refer to the official Go documentation for more information.

What't the means about var () in golang

1 Answers1