golang：可变参数函数的动态组成

Question

I'd like to call a variadic function and compose the parameter dynamically. Take fmt.Printf() for example. if I have a struct:

type Foo struct {
   a int
   b string
}

I'd like to call fmt.Printf(foo.a, foo.b). But if I have another Bar struct with 3 fields, I'd like to call fmt.Printf(bar.a, bar.b, bar.c).

So I'd like to write a function like this:

func MyPrint(obj interface{})

and be able to call it with MyPrint(foo) or MyPrint(bar) and the code will automatically figure out that foo has 2 fields and do:

...
fmt.Printf(foo.a, foo.b)

bar has 3 fields and do

...
fmt.Printf(bar.a, bar.b, bar.c)

In Python you can do something like call(*list). How can I achieve this in Go?

Answer 1

Use ellipsis operator

slice := []Type{Type{}, Type{}}
call(slice...)

for function

func(arg ...Type) {}