Macro gramit::assert_approx_eq

macro_rules! assert_approx_eq {
    ($a:expr, $b:expr, $($msg:expr),*) => { ... };
    ($a:expr, $b:expr) => { ... };
}

Assert that two expressions are approximately equal according to their ApproxEq implementations.

Passes additional parameters on to the standard library assert! macro, so custom format messages are accepted as per usual.

Example

use gramit::ApproxEq;
assert_approx_eq!(1.0_f32, 1.0_f32);

assert_approx_eq!(1.0, 1.0 + 0.5 * gramit::fp::EQ_THRESHOLD_F32,
    "{} and {} were not approximately equal; this shouldn't happen!",
    1.0,
    1.0 + 0.5 * gramit::fp::EQ_THRESHOLD_F32);