# 1.13.0[−][src]Macro std::debug_assert_ne

    macro_rules! debug_assert_ne {
        ($ ($ arg : tt) *) => { ... };
    }

Asserts that two expressions are not equal to each other.

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

Unlike `assert_ne!`, `debug_assert_ne!` statements are only enabled in non optimized builds by default. An optimized build will not execute `debug_assert_ne!` statements unless `-C debug-assertions` is passed to the compiler. This makes `debug_assert_ne!` useful for checks that are too expensive to be present in a release build but may be helpful during development. The result of expanding `debug_assert_ne!` is always type checked.

# Examples

    let a = 3;
    let b = 2;
    debug_assert_ne!(a, b);Run