Macro debug_assert_eq

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

Available on crate feature std only.

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 not execute 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. The result of expanding debug_assert_eq! is always type checked.

Examples

let a = 3;
let b = 1 + 2;
debug_assert_eq!(a, b);