// +build ignore,OMIT | |
package main | |
import ( | |
"fmt" | |
"reflect" | |
) | |
func makeSwap(fptr interface{}) { | |
swap := func(in []reflect.Value) []reflect.Value { | |
return []reflect.Value{in[1], in[0]} | |
} | |
fn := reflect.ValueOf(fptr).Elem() | |
v := reflect.MakeFunc(fn.Type(), swap) | |
fn.Set(v) | |
} | |
func main() { | |
var fn func(int, int) (int, int) | |
makeSwap(&fn) | |
fmt.Println(fn(0, 1)) | |
} |