mirror of
https://github.com/42wim/matterbridge.git
synced 2024-11-21 02:02:00 -08:00
80 lines
2.7 KiB
Go
80 lines
2.7 KiB
Go
// Copyright (c) 2017-2023 Uber Technologies, Inc.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
//go:build !go1.20
|
|
// +build !go1.20
|
|
|
|
package multierr
|
|
|
|
import "errors"
|
|
|
|
// Versions of Go before 1.20 did not support the Unwrap() []error method.
|
|
// This provides a similar behavior by implementing the Is(..) and As(..)
|
|
// methods.
|
|
// See the errors.Join proposal for details:
|
|
// https://github.com/golang/go/issues/53435
|
|
|
|
// As attempts to find the first error in the error list that matches the type
|
|
// of the value that target points to.
|
|
//
|
|
// This function allows errors.As to traverse the values stored on the
|
|
// multierr error.
|
|
func (merr *multiError) As(target interface{}) bool {
|
|
for _, err := range merr.Errors() {
|
|
if errors.As(err, target) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Is attempts to match the provided error against errors in the error list.
|
|
//
|
|
// This function allows errors.Is to traverse the values stored on the
|
|
// multierr error.
|
|
func (merr *multiError) Is(target error) bool {
|
|
for _, err := range merr.Errors() {
|
|
if errors.Is(err, target) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func extractErrors(err error) []error {
|
|
if err == nil {
|
|
return nil
|
|
}
|
|
|
|
// Note that we're casting to multiError, not errorGroup. Our contract is
|
|
// that returned errors MAY implement errorGroup. Errors, however, only
|
|
// has special behavior for multierr-specific error objects.
|
|
//
|
|
// This behavior can be expanded in the future but I think it's prudent to
|
|
// start with as little as possible in terms of contract and possibility
|
|
// of misuse.
|
|
eg, ok := err.(*multiError)
|
|
if !ok {
|
|
return []error{err}
|
|
}
|
|
|
|
return append(([]error)(nil), eg.Errors()...)
|
|
}
|