Macro float_eq::debug_assert_float_ne

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

Asserts that two floating point expressions are not equal to each other (using float_ne!).

• abs <= max_diff is an absolute epsilon comparison.
• rel <= max_diff is a relative epsilon comparison.
• ulps <= max_diff is an ULPs comparison.

On panic, this macro will print the values of the expressions with their debug representations, with additional information from the comparison operations (using FloatEqDebug and FloatDiff).

Like assert!, this macro has a second form, where a custom panic message can be provided.

Unlike assert_float_ne!, debug_assert_float_ne! statements are only enabled in non optimized builds by default. See debug_assert_ne! for more details.

Examples

let a: f32 = 4.;
let b: f32 = 4.1;

debug_assert_float_ne!(a, 3.9999990, rel <= f32::EPSILON);
debug_assert_float_ne!(a - b, 0., abs <= 0.00001, rel <= f32::EPSILON);
debug_assert_float_ne!(a - b, 0., abs <= 0.00001, ulps <= 10);

debug_assert_float_ne!(a - b, 0., abs <= 0.00001, ulps <= 10, "Checking that {} == {}", a, b);