Macro assert_eq_float::assert_eq_float

macro_rules! assert_eq_float {
    (@standard $left:ident, $right:ident, $error:ident) => { ... };
    (@custom $left:ident, $right:ident, $error:ident; $($arg:tt)+) => { ... };
    ($left:expr, $right:expr $(,)?) => { ... };
    ($left:expr, $right:expr; $($arg:tt)+) => { ... };
    ($left:expr, $right:expr, $error:expr $(,)?) => { ... };
    ($left:expr, $right:expr, $error:expr; $($arg:tt)+) => { ... };
}

Asserts that two float expressions are (approximately) equal to each other.

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

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

Examples

use assert_eq_float::assert_eq_float;

let a = 3.0;
let b = 1.0 + 2.0;

assert_eq_float!(a, b);

assert_eq_float!(a, b; "we are testing addition with {} and {}", a, b);

assert_eq_float!(a, b, 1e-7); // use a fixed error

Note that when setting a custom panic message, you should use a semicolon ; instead of a comma ,.