Macro gazebo::eq_chain

macro_rules! eq_chain {
    ($e:expr) => { ... };
    ($e:expr, $($x:expr),+ $(,)?) => { ... };
}

Performs a chain of equals operation expressions yielding bool, supporting early exit upon hitting the first expressions that returns false and returning false. This is useful for easily writing a sequence of equals expressions necessary to yield a bool The macro is expanded inplace, so any expressions dealing with Result types are allowed provided that the larger scope allows returning result.

use gazebo::eq_chain;

assert_eq!(
    eq_chain! {
        1 == 1,
        Ok::<_, ()>(2 == 2)?,
        3 == 4,
        panic!("won't reach this"),
    },
    false,
);