Macro fire_postgres::try2
source · macro_rules! try2 { ($exp:expr) => { ... }; }
Expand description
§Example
fn mul(maybe_num: Option<i32>) -> Result<Option<i32>, &'static str> {
let x = try2!(maybe_num);
x.checked_mul(2)
.map(Some)
.ok_or("overflow")
}