CODEWITHSUNDEEP
go
MitchellSalad
MitchellSalad

Reputation: 4281

In Go, is it possible to perform type conversions on the multiple return values of a function?

type Node int
node, err := strconv.Atoi(num)

Foo(Node(node))  // Foo takes a Node, not an int

Is it possible to avoid the ugly "Node(node)" in the above example? Is there a more idiomatic way to force the compiler to consider node a Node and not an int?

Upvotes: 1

Views: 175

Answers (2)

zzzz
zzzz

Reputation: 91253

No. Conversion converts an (convertible) expression. Return value of a function is a term (and thus possibly a convertible expression) iff the function has exactly one return value. Additional restrictions on the expression eligible for conversion can be found here.

Upvotes: 1

Sonia
Sonia

Reputation: 28355

Nothing really elegant. You could define an intermediate variable

n, err := strconv.Atoi(num)
node := Node(n)

or you could define a wrapper function

func parseNode(s string) Node {
    n, err := strconv.Atoi(num)
    return Node(n)
}

but I don't think there are any one-line tricks. The way you are doing it seems fine. There is still a little stuttering here and there in Go.

Upvotes: 3

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