golangHow to unwrap error
package main
import "errors"
import "fmt"
func get_error(really bool) (error) {
e := errors.New(":(")
if really {
return fmt.Errorf("Hmm: %w", e)
}
return nil
}
func main() {
wrapped_err := get_error(true)
fmt.Println(errors.Unwrap(wrapped_err))
}ctrl + cpackage maindefault package declaration | import "errors"load lib to work with errors |
get_errorsample function that returns error | errors.New(":(")create new error object |
fmt.Errorf(wraps given error object with additional message using | errors.Unwrap(unwraps given wrapped error to original error (or |
Usage example
package main
import "errors"
import "fmt"
func get_error(really bool) (error) {
e := errors.New(":(")
if really {
return fmt.Errorf("Hmm: %w", e)
}
return nil
}
func main() {
wrapped_err := get_error(true)
fmt.Println(errors.Unwrap(wrapped_err))
}output
:(
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