mirror of
https://github.com/superseriousbusiness/gotosocial.git
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58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
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// +build !go1.13
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package errors
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import (
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"reflect"
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)
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type unwrapper interface {
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Unwrap() error
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}
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// As assigns error or any wrapped error to the value target points
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// to. If there is no value of the target type of target As returns
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// false.
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func As(err error, target interface{}) bool {
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targetType := reflect.TypeOf(target)
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for {
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errType := reflect.TypeOf(err)
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if errType == nil {
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return false
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}
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if reflect.PtrTo(errType) == targetType {
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reflect.ValueOf(target).Elem().Set(reflect.ValueOf(err))
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return true
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}
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wrapped, ok := err.(unwrapper)
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if ok {
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err = wrapped.Unwrap()
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} else {
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return false
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}
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}
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}
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// Is detects whether the error is equal to a given error. Errors
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// are considered equal by this function if they are the same object,
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// or if they both contain the same error inside an errors.Error.
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func Is(e error, original error) bool {
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if e == original {
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return true
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}
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if e, ok := e.(*Error); ok {
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return Is(e.Err, original)
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}
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if original, ok := original.(*Error); ok {
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return Is(e, original.Err)
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}
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return false
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}
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