Macro yaum::impl_unit

macro_rules! impl_unit {
    ($type:ident) => { ... };
    ($type:ident, { $( $unit:ident: $value:expr ),* }) => { ... };
    ($type:ident, $basetype:ty, {$( $unit:ident: $value:expr ),*}) => { ... };
}

Define a unit. Specify units, constants in brackets.

Example:

#[macro_use] extern crate yaum;
use yaum::*;

yaum::impl_unit!(BitSize, {
    b: 1.0,
    kb: 1024.0,
    Mb: 1024.0 * 1024.0
});