Trait Or
logic::ops
pub trait Or<T, RHS> { fn or(self, rhs: RHS) -> Expr<T>; }
fn or(self, rhs: RHS) -> Expr<T>
impl<T, LHS, RHS> Or<T, RHS> for LHS where RHS: Into<Expr<T>>, LHS: Into<Expr<T>>,