Go-generics result module inspired by rust.
Avoid ifelse, handle result with chain methods, will you choose her?
Note: Migrated to gust.
go≥1.18
func ExampleAndThen() {
var divide = func(i, j float32) Result[float32] {
if j == 0 {
return Err[float32]("j can not be 0")
}
return Ok(i / j)
}
var ret float32 = divide(1, 2).AndThen(func(i float32) Result[float32] {
return Ok(i * 10)
}).Unwrap()
fmt.Println(ret)
// Output:
// 5
}func ExampleDefaultValue() {
const def int = 10
// before
i, err := strconv.Atoi("1")
if err != nil {
i = def
}
fmt.Println(i * 2)
// now
fmt.Println(Wrap(strconv.Atoi("1")).UnwrapOr(def) * 2)
// Output:
// 2
// 2
}