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// Copyright (c) 2017-2023 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//go:build go1.20
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// +build go1.20
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package multierr
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// Unwrap returns a list of errors wrapped by this multierr.
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func (merr *multiError) Unwrap() []error {
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	return merr.Errors()
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}
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type multipleErrors interface {
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	Unwrap() []error
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}
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func extractErrors(err error) []error {
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	if err == nil {
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		return nil
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	}
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	// check if the given err is an Unwrapable error that
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	// implements multipleErrors interface.
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	eg, ok := err.(multipleErrors)
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	if !ok {
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		return []error{err}
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	}
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	return append(([]error)(nil), eg.Unwrap()...)
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}
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