* suburb4nfi...@gmail.com <suburb4nfi...@gmail.com> [170621 08:44]:
> Is it possible to give a default nil value to an error at the beginning of
> a function and then just assign to it in case of need ? What I want to do
> is something like the following :
>
> func GetSummonerByName(name string, server string) *SummonerProfile err {
I think you mean
func GetSummonerByName(name string, server string) (profile *SummonerProfile,
err error) {
The named return values are initialized with the zero values for their
specific types, which for error is nil. (Be careful not to shadow
profile or err in the function.) A bare return without arguments will
return with the current values of the named return variables.
This playground example might be helpful <https://play.golang.org/p/6pPxaSHeQD>:
package main
import (
"fmt"
)
func Calc(a int) (r int, err error) {
if a == 0 {
err = fmt.Errorf("Bad argument")
return
}
r = 72 / a
return
}
func main() {
fmt.Println(Calc(3))
fmt.Println(Calc(0))
}
...Marvin
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