在Go中，是否可以对一个函数的多个返回值执行类型转换？

Question

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?

Answer 1

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.