v2ray-core/common/errors/errors.go

87 lines
1.3 KiB
Go

package errors
import (
"fmt"
"v2ray.com/core/common/serial"
)
type HasInnerError interface {
Inner() error
}
type Error struct {
message string
inner error
}
func (v *Error) Error() string {
return v.message
}
func (v *Error) Inner() error {
if v.inner == nil {
return nil
}
return v.inner
}
func New(msg ...interface{}) error {
return &Error{
message: serial.Concat(msg),
}
}
func Base(err error) ErrorBuilder {
return ErrorBuilder{
error: err,
}
}
func Format(format string, values ...interface{}) error {
return New(fmt.Sprintf(format, values...))
}
// Cause returns the root cause of this error.
func Cause(err error) error {
if err == nil {
return nil
}
for {
inner, ok := err.(HasInnerError)
if !ok {
break
}
if inner.Inner() == nil {
break
}
err = inner.Inner()
}
return err
}
type ErrorBuilder struct {
error
}
func (v ErrorBuilder) Message(msg ...interface{}) error {
if v.error == nil {
return nil
}
return &Error{
message: serial.ToString(msg) + " > " + v.error.Error(),
inner: v.error,
}
}
func (v ErrorBuilder) Format(format string, values ...interface{}) error {
if v.error == nil {
return nil
}
return &Error{
message: fmt.Sprintf(format, values...) + " > " + v.error.Error(),
inner: v.error,
}
}