Created
May 23, 2020 06:47
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experiment to show how erro unwrapping works in go:. Playground: https://play.golang.org/p/i0KKTRKfXOR
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| package main | |
| import ( | |
| "errors" | |
| "fmt" | |
| ) | |
| func main() { | |
| //Wrapping the errors | |
| err1 := errors.New("first") | |
| err2 := fmt.Errorf("err2 %w", err1) | |
| err3 := fmt.Errorf("err3 %w", err2) | |
| //unwrapping the errors | |
| gotErr1 := fmt.Errorf("hello %w", err3) | |
| fmt.Println(gotErr1) | |
| gotErr2 := errors.Unwrap(gotErr1) | |
| fmt.Println(gotErr2) | |
| gotErr3 := errors.Unwrap(gotErr2) | |
| fmt.Println(gotErr3) | |
| gotErr4 := errors.Unwrap(gotErr3) | |
| fmt.Println(gotErr4) | |
| //Unwrapping the inner most error keeps returning the same error | |
| gotErr5 := errors.Unwrap(gotErr3) | |
| fmt.Println(gotErr5) | |
| } |
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