Macro assert_le

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

Asserts that the first expression is less or equal than the second.

Requires that both expressions be comparable with <=.

Uses

Assertions are always checked in both debug and release builds, and cannot be disabled. See debug_assert_le! for assertions that are not enabled in release builds by default.

Custom messages

This macro has a second form, where a custom panic message can be provided with or without arguments for formatting. See std::fmt for syntax for this form.

Examples

assert_le!(1, 2);

// With a custom message
assert_le!(5, 5, "Expecting that {} is less or equal than {}", 5, 5);

assert_le!(6, 5);  // Will panic

// With a custom message
assert_le!(6, 5, "Not expecting {} to be less or equal than {}", 6, 5);