macro_rules! ok_or_else {
($result:expr, || $closure:expr) => { ... };
}
Expand description
An analog to Option::ok_or_else
but without a closure.
use macro_map::ok_or_else;
let myoption: Option<&str> = None;
let mapped = ok_or_else!(myoption, || 123);
assert_eq!(mapped, Err(123));
Or with postfix-macros
:
use macro_map::ok_or_else;
use postfix_macros::postfix_macros;
let myoption: Option<&str> = None;
postfix_macros! {
let mapped = ok_or_else!(myoption, || 123);
}
assert_eq!(mapped, Err(123));