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//go:build go1.13
// +build go1.13
package errors
import (
baseErrors "errors"
)
// As finds the first error in err's tree that matches target, and if one is found, sets
// target to that error value and returns true. Otherwise, it returns false.
//
// For more information see stdlib errors.As.
func As(err error, target interface{}) bool {
return baseErrors.As(err, target)
}
// Is detects whether the error is equal to a given error. Errors
// are considered equal by this function if they are matched by errors.Is
// or if their contained errors are matched through errors.Is.
func Is(e error, original error) bool {
if baseErrors.Is(e, original) {
return true
}
if e, ok := e.(*Error); ok {
return Is(e.Err, original)
}
if original, ok := original.(*Error); ok {
return Is(e, original.Err)
}
return false
}
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