-
Notifications
You must be signed in to change notification settings - Fork 15
/
empty.go
59 lines (46 loc) · 1.07 KB
/
empty.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
package utils
import (
"reflect"
)
func isEmpty(v reflect.Value) bool {
if !v.IsValid() {
return true
}
switch v.Kind() {
case reflect.Bool:
return v.Bool() == false
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
reflect.Uint64, reflect.Uintptr:
return v.Uint() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.Complex64, reflect.Complex128:
return v.Complex() == 0
case reflect.Ptr, reflect.Interface:
return isEmpty(v.Elem())
case reflect.Array:
for i := 0; i < v.Len(); i++ {
if !isEmpty(v.Index(i)) {
return false
}
}
return true
case reflect.Slice, reflect.String, reflect.Map:
return v.Len() == 0
case reflect.Struct:
for i, n := 0, v.NumField(); i < n; i++ {
if !isEmpty(v.Field(i)) {
return false
}
}
return true
default:
return v.IsNil()
}
}
// IsEmpty checks whether v is an empty struct
func IsEmpty(v interface{}) bool {
return isEmpty(reflect.ValueOf(v))
}