gotosocial/vendor/codeberg.org/gruf/go-errors/v2/value.go
dependabot[bot] a6c6bdb34a
[chore]: Bump codeberg.org/gruf/go-errors/v2 from 2.0.2 to 2.1.1 (#1346)
Bumps codeberg.org/gruf/go-errors/v2 from 2.0.2 to 2.1.1.

---
updated-dependencies:
- dependency-name: codeberg.org/gruf/go-errors/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2023-01-17 11:25:13 +00:00

54 lines
851 B
Go

package errors
// WithValue wraps err to store given key-value pair, accessible via Value() function.
func WithValue(err error, key any, value any) error {
if err == nil {
panic("nil error")
}
return &errWithValue{
err: err,
key: key,
val: value,
}
}
// Value searches for value stored under given key in error chain.
func Value(err error, key any) any {
var e *errWithValue
if !As(err, &e) {
return nil
}
return e.Value(key)
}
type errWithValue struct {
err error
key any
val any
}
func (e *errWithValue) Error() string {
return e.err.Error()
}
func (e *errWithValue) Is(target error) bool {
return e.err == target
}
func (e *errWithValue) Unwrap() error {
return Unwrap(e.err)
}
func (e *errWithValue) Value(key any) any {
for {
if key == e.key {
return e.val
}
if !As(e.err, &e) {
return nil
}
}
}