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extern crate serde; #[macro_use] extern crate serde_derive; use std::cmp::Ordering; #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)] pub struct Invert<T: Ord>(T); impl<T: Ord> PartialOrd for Invert<T> { fn partial_cmp(&self, other: &Self) -> Option<Ordering> { Some(other.0.cmp(&self.0)) } } impl<T: Ord> Ord for Invert<T> { fn cmp(&self, other: &Self) -> Ordering { other.0.cmp(&self.0) } } impl<T: Ord> Invert<T> { pub fn new(t: T) -> Self { Invert(t) } pub fn inner(&self) -> &T { &self.0 } pub fn into_inner(self) -> T { self.0 } }