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extra: impl IterBytes for uuid::Uuid #11130

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extra: impl IterBytes for uuid::Uuid #11130

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17 changes: 17 additions & 0 deletions src/libextra/uuid.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,7 @@ use std::rand;
use std::rand::Rng;
use std::cmp::Eq;
use std::cast::{transmute,transmute_copy};
use std::to_bytes::{IterBytes, Cb};

use serialize::{Encoder, Encodable, Decoder, Decodable};

Expand Down Expand Up @@ -104,6 +105,11 @@ pub struct Uuid {
/// The 128-bit number stored in 16 bytes
bytes: UuidBytes
}
impl IterBytes for Uuid {
fn iter_bytes(&self, _: bool, f: Cb) -> bool {
f(self.bytes.slice_from(0))
}
}

/// A UUID stored as fields (identical to UUID, used only for conversions)
struct UuidFields {
Expand Down Expand Up @@ -796,6 +802,17 @@ mod test {
let u2 = Decodable::decode(&mut ebml::reader::Decoder(doc));
assert_eq!(u, u2);
}

#[test]
fn test_iterbytes_impl_for_uuid() {
use std::hashmap::HashSet;
let mut set = HashSet::new();
let id1 = Uuid::new_v4();
let id2 = Uuid::new_v4();
set.insert(id1);
assert!(set.contains(&id1));
assert!(!set.contains(&id2));
}
}

#[cfg(test)]
Expand Down