# Macro std::assert_ne

1.13.0 · source ·

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

Expand description

Asserts that two expressions are not equal to each other (using `PartialEq`).

On panic, this macro will print the values of the expressions with their debug representations.

Like `assert!`, this macro has a second form, where a custom panic message can be provided.

## Examples

    let a = 3;
    let b = 2;
    assert_ne!(a, b);

    assert_ne!(a, b, "we are testing that the values are not equal");

Run