Macro assert_some 

macro_rules! assert_some {
    ($opt:expr) => { ... };
    ($opt:expr, $msg:expr) => { ... };
}

断言 Option 为 Some，返回值

示例

let value: Option<String> = Some("test".to_string());
let inner = assert_some!(value, "test_some");
assert_eq!(inner, "test");