/
util.go
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/
util.go
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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package nilutil
import "reflect"
// IsNil does proper nil check for interface{} values taken from users
// "== nil" check for interfaces are not enough
//when an nil pointer is assigned to interface, it returns false from "== nil" check
// Example:
//var pnt *int
//var inf interface{}
//inf = pnt
//fmt.Println(inf == nil) // false
//fmt.Println(isNil(inf)) // true
func IsNil(arg interface{}) bool {
if arg == nil {
return true
}
value := reflect.ValueOf(arg)
return value.Kind() == reflect.Ptr && value.IsNil()
}