Dynamically call function not bound to a struct in Golang [duplicate]

I'm trying to call functions that are not bound to any form of struct using reflection which doesn't seem to be possible.

I keep running into the issue of having to call reflect.ValueOf(T) which isn't possible since the functions are not bound to any form of struct.

// main.go

const subPackage = "subPackage"

func main() {
    set := token.NewFileSet()
    packs, err := parser.ParseDir(set, subPackage, nil, 0)

    if err != nil {
        fmt.Println("failed to parse package:", err)
        os.Exit(1)
    }

    var funcs []*ast.FuncDecl

    for _, pack := range packs {
        for _, f := range pack.Files {
            for _, d := range f.Decls {
                if fn, isFn := d.(*ast.FuncDecl); isFn {
                    funcs = append(funcs, fn)
                    reflect.ValueOf(T)MethodByName(fn.Name.Name) // not possible since T would need to be a struct!
                }
            }
        }
    }
}

// subPackage/test.go

func testFunc() {
    fmt.Println("hello world")
}

The code currently just parses the directory subPackage and gets all the root-level function declarations, I'm just not sure how to go about calling the unbound functions without a struct.