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#[macro_export]
macro_rules! assure_lt {
($left:expr, $right:expr $(,)?) => ({
match (&$left, &$right) {
(left_val, right_val) => {
if (left_val < right_val) {
Ok(true)
} else {
Ok(false)
}
}
}
} as Result<bool, String>);
($left:expr, $right:expr, $($arg:tt)+) => ({
match (&($left), &($right)) {
(left_val, right_val) => {
if (left_val < right_val) {
Ok(true)
} else {
Ok(false)
}
}
}
} as Result<bool, String>);
}
#[cfg(test)]
mod tests {
#[test]
fn test_assure_lt_x_arity_2_success() {
let a = 1;
let b = 2;
let x = assure_lt!(a, b);
assert_eq!(
x.unwrap(),
true
);
}
#[test]
fn test_assure_lt_x_arity_2_failure() {
let a = 2;
let b = 1;
let x = assure_lt!(a, b);
assert_eq!(
x.unwrap(),
false
);
}
#[test]
fn test_assure_lt_x_arity_3_success() {
let a = 1;
let b = 2;
let x = assure_lt!(a, b, "message");
assert_eq!(
x.unwrap(),
true
);
}
#[test]
fn test_assure_lt_x_arity_3_failure() {
let a = 2;
let b = 1;
let x = assure_lt!(a, b, "message");
assert_eq!(
x.unwrap(),
false
);
}
}