将命名类型转换为未命名类型

Say I have a struct of UnnamedTypes:

type UnnamedTypes struct {
    i []int
    f []float64
}

And some named types in a struct:

type I []int
type F []float64

type NamedTypes struct {
    i I
    f F
}

What's the easiest way to assign NamedTypes struct to an UnnamedTypes struct?

func main() {
    var u UnnamedTypes
    var n NamedTypes

    u.i = []int{1,2}
    u.f = []float64{2,3}

    n.i = []int{2,3}
    n.f = []float64{4,5}

    u = UnnamedTypes(n)
}

fails with cannot convert n (type NamedTypes) to type UnnamedTypes

Create a new struct value using the old ones.

u = UnnamedTypes{
    i: n.i,
    f: n.f,
}

A warning though, because these specific values are slices, the slices in the two different structs are the exact same slices. Modifying one will modify the other. The same will apply to any pointers as well (including maps and interfaces). If you want them to have their own copy, you must allocate a copy.