Macro increment

macro_rules! increment {
    ($counter:expr, $field:ident) => { ... };
    ($counter:expr, $field:ident, $value:expr) => { ... };
    (timer, $counter:expr, $field:ident) => { ... };
    (timer, $counter:expr, $field:ident, $value:expr) => { ... };
}

Increase the field given, by default incrementing by 1