Macro float_eq::debug_assert_float_eq

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

Asserts that two floating point expressions are equal to each other.

See the top level documentation for a list of available comparison algorithms.

On panic, this macro will print the values of the expressions with their debug representations, with additional information from the comparison operations. Like assert!, this macro has a second form, where a custom panic message can be provided.

Unlike assert_float_eq!, debug_assert_float_eq! statements are only enabled in non optimized builds by default. See debug_assert_eq! for more details.

Examples

let a: f32 = 4.0;
let b: f32 = 4.000_002_5;

debug_assert_float_eq!(a, b, ulps <= 10);
debug_assert_float_eq!(a, 3.999_999_6, rmax <= 2.0 * f32::EPSILON);
debug_assert_float_eq!(a - b, 0.0, abs <= 0.000_01, "Checking that {} == {}", a, b);