// Copyright © 2024 OpenIM. 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 rpccache

func newListMap[V comparable](values []V, err error) (*listMap[V], error) {
	if err != nil {
		return nil, err
	}
	lm := &listMap[V]{
		List: values,
		Map:  make(map[V]struct{}, len(values)),
	}
	for _, value := range values {
		lm.Map[value] = struct{}{}
	}
	return lm, nil
}

type listMap[V comparable] struct {
	List []V
	Map  map[V]struct{}
}