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std::cmp::PartialOrd

Trait std::cmp::PartialOrd

#[lang = "ord"]
pub trait PartialOrd<Rhs = Self>: PartialEq<Rhs> where    Rhs: ?Sized, {
    fn partial_cmp(&self, other: &Rhs) -> Option<Ordering>;

    fn lt(&self, other: &Rhs) -> bool { ... }
    fn le(&self, other: &Rhs) -> bool { ... }
    fn gt(&self, other: &Rhs) -> bool { ... }
    fn ge(&self, other: &Rhs) -> bool { ... }
}

Trait for values that can be compared for a sort-order.

The comparison must satisfy, for all a, b and c:

  • antisymmetry: if a < b then !(a > b), as well as a > b implying !(a < b); and
  • transitivity: a < b and b < c implies a < c. The same must hold for both == and >.