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errors.go
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/
errors.go
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package xx
import (
"strconv"
"strings"
"sync"
)
type Errors []error
func (errs Errors) Error() string {
sb := &strings.Builder{}
for i, err := range errs {
if err == nil {
continue
}
if sb.Len() > 0 {
sb.WriteString("; ")
}
sb.WriteRune('#')
sb.WriteString(strconv.Itoa(i))
sb.WriteString(": ")
sb.WriteString(err.Error())
}
return sb.String()
}
type ErrorGroup interface {
Add(err error)
Set(i int, err error)
Unwrap() error
}
type errorGroup struct {
errors Errors
locker *sync.RWMutex
}
func NewErrorGroup() ErrorGroup {
return &errorGroup{
locker: &sync.RWMutex{},
}
}
func (eg *errorGroup) Add(err error) {
eg.locker.Lock()
defer eg.locker.Unlock()
eg.errors = append(eg.errors, err)
}
func (eg *errorGroup) Set(i int, err error) {
eg.locker.Lock()
defer eg.locker.Unlock()
if i >= len(eg.errors) {
eg.errors = append(eg.errors, make([]error, i+1-len(eg.errors))...)
}
eg.errors[i] = err
}
func (eg *errorGroup) Unwrap() error {
eg.locker.RLock()
defer eg.locker.RUnlock()
for _, err := range eg.errors {
if err != nil {
return eg.errors
}
}
return nil
}