package util

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

type wrapped struct {
	context  string
	original error
}

func (w *wrapped) Error() string {
	return w.context + ": " + w.original.Error()
}

func (w *wrapped) Unwrap() error {
	return w.original
}

// WrapError wraps an error in a context for that error. This allows comparison
// of errors using errors.Is. This is much faster than fmt.Errorf, so it should
// be preferred wherever that performance impact is considered significant.
func WrapError(context string, e error) error {
	return &wrapped{
		context:  context,
		original: e,
	}
}
