Hello,
I want to build a "universal slice reverser" with reflect.MakeFunc. But I
don't know how to get a copy of reflect.Value's underlying value, which
make result not correct.
Here is the code:
package main
import (
"fmt"
"reflect"
)
func reverse(in []reflect.Value) (out []reflect.Value) {
inls := in[0]
inlslen := inls.Len()
for i, j := 0, inlslen-1; i < j; i, j = i+1, j-1 {
a := inls.Index(i)
b := inls.Index(j)
// how to get underlying value of a and b ?
a.Set(b)
b.Set(a)
}
return in
}
var intFlipper func([]int) []int
func main() {
emptyFunc := reflect.ValueOf(&intFlipper).Elem()
pseudoFunc := reflect.MakeFunc(emptyFunc.Type(), reverse)
emptyFunc.Set(pseudoFunc)
fmt.Printf("%v\n", intFlipper([]int{2, 3, 4, 5, 6, 7}))
}
My code return [7 6 5 5 6 7], but excepting result is [7 6 5 4 3 2]
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