Macro impl_ops

macro_rules! impl_ops {
    (@inner, $(#[$meta:meta])* [$($bound:tt)*]; $tr:ty, $rhs:ty, $a:ty, $f:expr, $fn:tt) => { ... };
    (@inner_assign, $(#[$meta:meta])* [$($bound:tt)*]; $tr:ty, $rhs:ty, $a:ty, $f:expr, $fn:tt) => { ... };
    ($(#[$meta:meta])* [$($bound:tt)*]; $trait:ident for $a:ty, $f:expr) => { ... };
    ($(#[$meta:meta])* [$($bound:tt)*]; $trait:ident <$rhs:ty> for $a:ty, $f:expr) => { ... };
    ($(#[$meta:meta])* $trait:ident for $a:ty, $f:expr) => { ... };
    ($(#[$meta:meta])* $trait:ident <$rhs:ty> for $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Add, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Sub, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Mul, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Div, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Rem, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; AddAssign, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; SubAssign, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; MulAssign, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; DivAssign, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; RemAssign, $rhs:ty, $a:ty, $f:expr) => { ... };
    (@when $(#[$meta:meta])* [$($bound:tt)*]; Neg, $rhs:ty, $a:ty, $f:expr) => { ... };
}

Add, Sub, Mul, Div, Rem, AddAssign, SubAssign, MulAssign, DivAssign, RemAssign, Negを実装する。