mod clock_api;   pub use self::clock_api::*;
mod clock_model; pub use self::clock_model::*;

pub trait HasClock: Send + Sync {
    fn clock (&self) -> &Clock;
    fn clock_mut (&mut self) -> &mut Clock;
}

#[macro_export] macro_rules! has_clock {
    (|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
        impl $(<$($L),*$($T $(: $U)?),*>)? HasClock for $Struct $(<$($L),*$($T),*>)? {
            fn clock (&$self) -> &Clock { &$cb }
            fn clock_mut (&mut $self) -> &mut Clock { &mut $cb }
        }
    }
}