63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
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// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package errors
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import (
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"bytes"
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"fmt"
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)
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// The MultiError type implements the error interface, and contains the
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// Errors used to construct it.
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type MultiError []error
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// Returns a concatenated string of the contained errors
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func (es MultiError) Error() string {
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var buf bytes.Buffer
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if len(es) > 1 {
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fmt.Fprintf(&buf, "%d errors: ", len(es))
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}
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for i, err := range es {
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if i != 0 {
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buf.WriteString("; ")
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}
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buf.WriteString(err.Error())
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}
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return buf.String()
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}
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// Add adds the error to the error list if it is not nil.
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func (es *MultiError) Add(err error) {
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if err == nil {
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return
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}
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if merr, ok := err.(MultiError); ok {
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*es = append(*es, merr...)
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} else {
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*es = append(*es, err)
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}
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}
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// Err returns the error list as an error or nil if it is empty.
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func (es MultiError) Err() error {
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if len(es) == 0 {
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return nil
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}
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return es
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}
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