// Copyright 2019 The SwiftShader Authors. 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 cause provides functions for building wrapped errors.
package cause

import (
	"fmt"
)

// errWithCause is an error that wrap an inner error with additional info.
type errWithCause struct {
	cause error
	msg   string
}

func (e errWithCause) Error() string { return fmt.Sprintf("%s. Cause: %v", e.msg, e.cause) }

// Wrap returns a new error wrapping cause with the additional message.
func Wrap(cause error, msg string, args ...interface{}) error {
	return errWithCause{cause, fmt.Sprintf(msg, args...)}
}