gtsocial-umbx

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map_key.go (1218B)

      1 package internal
      2 
      3 import "reflect"
      4 
      5 var ifaceType = reflect.TypeOf((*interface{})(nil)).Elem()
      6 
      7 type MapKey struct {
      8 	iface interface{}
      9 }
     10 
     11 func NewMapKey(is []interface{}) MapKey {
     12 	return MapKey{
     13 		iface: newMapKey(is),
     14 	}
     15 }
     16 
     17 func newMapKey(is []interface{}) interface{} {
     18 	switch len(is) {
     19 	case 1:
     20 		ptr := new([1]interface{})
     21 		copy((*ptr)[:], is)
     22 		return *ptr
     23 	case 2:
     24 		ptr := new([2]interface{})
     25 		copy((*ptr)[:], is)
     26 		return *ptr
     27 	case 3:
     28 		ptr := new([3]interface{})
     29 		copy((*ptr)[:], is)
     30 		return *ptr
     31 	case 4:
     32 		ptr := new([4]interface{})
     33 		copy((*ptr)[:], is)
     34 		return *ptr
     35 	case 5:
     36 		ptr := new([5]interface{})
     37 		copy((*ptr)[:], is)
     38 		return *ptr
     39 	case 6:
     40 		ptr := new([6]interface{})
     41 		copy((*ptr)[:], is)
     42 		return *ptr
     43 	case 7:
     44 		ptr := new([7]interface{})
     45 		copy((*ptr)[:], is)
     46 		return *ptr
     47 	case 8:
     48 		ptr := new([8]interface{})
     49 		copy((*ptr)[:], is)
     50 		return *ptr
     51 	case 9:
     52 		ptr := new([9]interface{})
     53 		copy((*ptr)[:], is)
     54 		return *ptr
     55 	case 10:
     56 		ptr := new([10]interface{})
     57 		copy((*ptr)[:], is)
     58 		return *ptr
     59 	default:
     60 	}
     61 
     62 	at := reflect.New(reflect.ArrayOf(len(is), ifaceType)).Elem()
     63 	for i, v := range is {
     64 		*(at.Index(i).Addr().Interface().(*interface{})) = v
     65 	}
     66 	return at.Interface()
     67 }