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

# Macro core::debug_assert_eq 1.0.0 [−] [src]

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

Asserts that two expressions are equal to each other.

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

Unlike `assert_eq!`, `debug_assert_eq!` statements are only enabled in non optimized builds by default. An optimized build will omit all `debug_assert_eq!` statements unless `-C debug-assertions` is passed to the compiler. This makes `debug_assert_eq!` 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 = 1 + 2;
    debug_assert_eq!(a, b);Run

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