GoToSocial/vendor/codeberg.org/gruf/go-errors/v2/standard.go

83 lines
1.7 KiB
Go

package errors
import (
"errors"
)
// See: errors.Is().
func Is(err error, target error) bool { return errors.Is(err, target) }
// IsV2 calls Is(err, target) for each target within targets.
func IsV2(err error, targets ...error) bool {
for _, target := range targets {
if Is(err, target) {
return true
}
}
return false
}
// See: errors.As().
func As(err error, target any) bool { return errors.As(err, target) }
// AsV2 is functionally similar to As(), instead
// leveraging generics to handle allocation and
// returning of a concrete generic parameter type.
func AsV2[Type any](err error) Type {
var t Type
var ok bool
errs := []error{err}
for len(errs) > 0 {
// Pop next error to check.
err := errs[len(errs)-1]
errs = errs[:len(errs)-1]
// Check direct type.
t, ok = err.(Type)
if ok {
return t
}
// Look for .As() support.
as, ok := err.(interface {
As(target any) bool
})
if ok {
// Attempt .As().
if as.As(&t) {
return t
}
}
// Try unwrap errors.
switch u := err.(type) {
case interface{ Unwrap() error }:
errs = append(errs, u.Unwrap())
case interface{ Unwrap() []error }:
errs = append(errs, u.Unwrap()...)
}
}
return t
}
// See: errors.Unwrap().
func Unwrap(err error) error { return errors.Unwrap(err) }
// UnwrapV2 is functionally similar to Unwrap(), except that
// it also handles the case of interface{ Unwrap() []error }.
func UnwrapV2(err error) []error {
switch u := err.(type) {
case interface{ Unwrap() error }:
if e := u.Unwrap(); err != nil {
return []error{e}
}
case interface{ Unwrap() []error }:
return u.Unwrap()
}
return nil
}
// See: errors.Join().
func Join(errs ...error) error { return errors.Join(errs...) }