slice.go raw

   1  // Copyright 2022-2025 The sacloud/packages-go Authors
   2  //
   3  // Licensed under the Apache License, Version 2.0 (the "License");
   4  // you may not use this file except in compliance with the License.
   5  // You may obtain a copy of the License at
   6  //
   7  //      http://www.apache.org/licenses/LICENSE-2.0
   8  //
   9  // Unless required by applicable law or agreed to in writing, software
  10  // distributed under the License is distributed on an "AS IS" BASIS,
  11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  // See the License for the specific language governing permissions and
  13  // limitations under the License.
  14  
  15  package objutil
  16  
  17  import "reflect"
  18  
  19  // ToSlice vがsliceだったら[]interface{}にする
  20  // vが非スライスだったらvを単一の要素とする[]interface{}を返す
  21  func ToSlice(v interface{}) []interface{} {
  22  	if v == nil {
  23  		return nil
  24  	}
  25  
  26  	rv := reflect.ValueOf(v)
  27  	if rv.Kind() != reflect.Slice {
  28  		return []interface{}{v}
  29  	}
  30  
  31  	var results []interface{}
  32  	for i := 0; i < rv.Len(); i++ {
  33  		results = append(results, rv.Index(i).Interface())
  34  	}
  35  	return results
  36  }
  37