macro_rules! range_size_to_usize {
($diff:expr, f32) => { ... };
($diff:expr, f64) => { ... };
($diff:expr, $ty:ty) => { ... };
}macro_rules! range_size_to_usize {
($diff:expr, f32) => { ... };
($diff:expr, f64) => { ... };
($diff:expr, $ty:ty) => { ... };
}