mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-13 09:04:06 -08:00
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
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 conversion
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
)
|
|
|
|
// EnforcePtr ensures that obj is a pointer of some sort. Returns a reflect.Value
|
|
// of the dereferenced pointer, ensuring that it is settable/addressable.
|
|
// Returns an error if this is not possible.
|
|
func EnforcePtr(obj interface{}) (reflect.Value, error) {
|
|
v := reflect.ValueOf(obj)
|
|
if v.Kind() != reflect.Ptr {
|
|
if v.Kind() == reflect.Invalid {
|
|
return reflect.Value{}, fmt.Errorf("expected pointer, but got invalid kind")
|
|
}
|
|
return reflect.Value{}, fmt.Errorf("expected pointer, but got %v type", v.Type())
|
|
}
|
|
if v.IsNil() {
|
|
return reflect.Value{}, fmt.Errorf("expected pointer, but got nil")
|
|
}
|
|
return v.Elem(), nil
|
|
}
|