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#[macro_export]
macro_rules! assert_lt {
($left:expr, $right:expr $(,)?) => {
match (&$left, &$right) {
(left, right) if !(*left < *right) => $crate::assert_comparison_failed!(
$crate::panicking::Ref(left),
$crate::panicking::Comparison::Less,
$crate::panicking::Ref(right),
),
_ => {}
}
};
($left:expr, $right:expr, $($arg:tt)+) => {
match (&$left, &$right) {
(left, right) if !(*left < *right) => $crate::assert_comparison_failed!(
$crate::panicking::Ref(left),
$crate::panicking::Comparison::Less,
$crate::panicking::Ref(right),
$($arg)+
),
_ => {}
}
};
}
#[macro_export]
macro_rules! debug_assert_lt {
($($arg:tt)*) => {
if cfg!(debug_assertions) {
$crate::assert_lt!($($arg)*);
}
}
}
#[cfg(test)]
mod tests {
#[test]
#[should_panic(expected = "assertion failed: left < right\n left: `2`\nright: `1`")]
fn check_assert_lt_panic() {
assert_lt!(2, 1);
}
#[test]
#[should_panic(
expected = "assertion failed: left < right\n left: `2`\nright: `1`\ni'm confused"
)]
fn check_assert_lt_panic_with_message() {
assert_lt!(2, 1, "i'm confused");
}
#[test]
fn check_assert_lt_pass() {
assert_lt!(1, 2);
}
}