Macro assert_le 

macro_rules! assert_le {
    ($left:expr, $right:expr $(,)?) => { ... };
    ($left:expr, $right:expr, $($arg:tt)+) => { ... };
}

Asserts that the left hand side expression is lesser than or equal to the right hand side expression

Examples

let a = 200; let b = 100;
#[cfg(should_panic)]
assert_le!(a, b); // This would panic