Macro helper::option

option!() { /* proc-macro */ }

👎 Deprecated:

For unwrap operation, use try_option instead.

The std::option::Option relative operations.

Operations

unwrap .. or ..

option!(unwrap .. or ..) expand to match .. { Some(x) => x, None => .. }.

Example

use helper::option;

// Like Option::unwrap_or.
assert_eq!(option!(unwrap Some(true) or false), true);
assert_eq!(option!(unwrap None or false), false);

// Return in advance.
fn foo() -> bool {
    let x = option!(unwrap Some("foo") or return false);
    x == "foo"
}
assert!(foo());

// Break in advance.
let x = loop {
    option!(unwrap None or break 1i32);
};
assert_eq!(x, 1);