28 lines
356 B
Go
28 lines
356 B
Go
// ## Errors
|
|
|
|
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
)
|
|
|
|
func myFun(arg int) (int, error) {
|
|
if arg == 42 {
|
|
return -1, errors.New("Can't work with 42")
|
|
|
|
}
|
|
return arg + 3, nil
|
|
}
|
|
|
|
func main() {
|
|
r, _ := myFun(7)
|
|
fmt.Println(r)
|
|
|
|
_, e := myFun(42)
|
|
fmt.Println(e)
|
|
}
|
|
|
|
// todo: custom errors
|
|
// todo: data conveying errors
|