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Add PartialOrd and Ord for PeerId (#1594)

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for using PeerId in order based collections. Ord uses borrow to be
consistent with equality.
This commit is contained in:
Rüdiger Klaehn 2020-06-15 16:04:43 +02:00 committed by GitHub
parent e8bf34fcf1
commit 926274e88c
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1 changed files with 16 additions and 1 deletions
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17
core/src/peer_id.rs
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@ -23,7 +23,7 @@ use bs58;
use thiserror::Error; use thiserror::Error;
use multihash::{self, Code, Sha2_256}; use multihash::{self, Code, Sha2_256};
use rand::Rng; use rand::Rng;
use std::{convert::TryFrom, borrow::Borrow, fmt, hash, str::FromStr}; use std::{convert::TryFrom, borrow::Borrow, fmt, hash, str::FromStr, cmp};
/// Public keys with byte-lengths smaller than `MAX_INLINE_KEY_LENGTH` will be /// Public keys with byte-lengths smaller than `MAX_INLINE_KEY_LENGTH` will be
/// automatically used as the peer id using an identity multihash. /// automatically used as the peer id using an identity multihash.
@ -57,6 +57,21 @@ impl fmt::Display for PeerId {
} }
} }
impl cmp::PartialOrd for PeerId {
fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
Some(Ord::cmp(self, other))
}
}
impl cmp::Ord for PeerId {
fn cmp(&self, other: &Self) -> cmp::Ordering {
// must use borrow, because as_bytes is not consistent with equality
let lhs: &[u8] = self.borrow();
let rhs: &[u8] = other.borrow();
lhs.cmp(rhs)
}
}
impl PeerId { impl PeerId {
/// Builds a `PeerId` from a public key. /// Builds a `PeerId` from a public key.
pub fn from_public_key(key: PublicKey) -> PeerId { pub fn from_public_key(key: PublicKey) -> PeerId {