24 lines
530 B
Rust
24 lines
530 B
Rust
|
#[macro_export]
|
||
|
|
macro_rules! is_match {
|
||
|
|
($expression: expr, $($pattern:tt)+) => {
|
||
|
|
is_match! {tt
|
||
|
|
match $expression {
|
||
|
|
$($pattern)+ => true,
|
||
|
|
_ => false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
(tt $value:expr) => ($value);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_matching() {
|
||
|
|
let foo = Some("-12");
|
||
|
|
assert!(is_match!(foo, Some(bar) if
|
||
|
|
is_match!(bar.as_bytes()[0], b'+' | b'-') &&
|
||
|
|
is_match!(bar.as_bytes()[1], b'0'...b'9')
|
||
|
|
));
|
||
|
|
assert!(!is_match!(foo, None));
|
||
|
|
}
|
||
|
|
|