core::debug_assert_ne - Rust
Description: API documentation for the Rust `debug_assert_ne` macro in crate `core`.
Keywords: rust, rustlang, rust-lang, debug_assert_ne

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

    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 omit all `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.

# Examples

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

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