1.0.0[−][src]Trait std::cmp::Eq

pub trait Eq: PartialEq<Self> { }

Trait for equality comparisons which are equivalence relations.

This means, that in addition to a == b and a != b being strict inverses, the equality must be (for all a, b and c):

This property cannot be checked by the compiler, and therefore Eq implies PartialEq, and has no extra methods.

Derivable

This trait can be used with #[derive]. When derived, because Eq has no extra methods, it is only informing the compiler that this is an equivalence relation rather than a partial equivalence relation. Note that the derive strategy requires all fields are Eq, which isn't always desired.

How can I implement Eq?

If you cannot use the derive strategy, specify that your type implements Eq, which has no methods:

enum BookFormat { Paperback, Hardback, Ebook }
struct Book {
    isbn: i32,
    format: BookFormat,
}
impl PartialEq for Book {
    fn eq(&self, other: &Self) -> bool {
        self.isbn == other.isbn
    }
}
impl Eq for Book {}Run

Implementations on Foreign Types

impl<'a> Eq for Utf8LossyChunk<'a>[src]

impl Eq for CpuidResult[src]

impl Eq for CollectionAllocErr

impl<T, S> Eq for HashSet<T, S> where
    S: BuildHasher,
    T: Eq + Hash, 

impl<K, V, S> Eq for HashMap<K, V, S> where
    K: Eq + Hash,
    S: BuildHasher,
    V: Eq, 

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Implementors

impl Eq for std::cmp::Ordering[src]

impl Eq for std::collections::CollectionAllocErr[src]

impl Eq for Infallible[src]

impl Eq for VarError[src]

impl Eq for ErrorKind[src]

impl Eq for SeekFrom[src]

impl Eq for IpAddr[src]

impl Eq for Ipv6MulticastScope[src]

impl Eq for Shutdown[src]

impl Eq for SocketAddr[src]

impl Eq for FpCategory[src]

impl Eq for IntErrorKind[src]

impl Eq for SearchStep[src]

impl Eq for std::sync::atomic::Ordering[src]

impl Eq for RecvTimeoutError[src]

impl Eq for TryRecvError[src]

impl Eq for bool[src]

impl Eq for char[src]

impl Eq for i128[src]

impl Eq for i16[src]

impl Eq for i32[src]

impl Eq for i64[src]

impl Eq for i8[src]

impl Eq for isize[src]

impl Eq for ![src]

impl Eq for str[src]

impl Eq for u128[src]

impl Eq for u16[src]

impl Eq for u32[src]

impl Eq for u64[src]

impl Eq for u8[src]

impl Eq for ()[src]

impl Eq for usize[src]

impl Eq for AllocErr[src]

impl Eq for CannotReallocInPlace[src]

impl Eq for Layout[src]

impl Eq for LayoutErr[src]

impl Eq for TypeId[src]

impl Eq for CharTryFromError[src]

impl Eq for DecodeUtf16Error[src]

impl Eq for ParseCharError[src]

impl Eq for UnicodeVersion[src]

impl Eq for CStr[src]

impl Eq for CString[src]

impl Eq for FromBytesWithNulError[src]

impl Eq for IntoStringError[src]

impl Eq for NulError[src]

impl Eq for OsStr[src]

impl Eq for OsString[src]

impl Eq for Error[src]

impl Eq for FileType[src]

impl Eq for Permissions[src]

impl Eq for PhantomPinned[src]

impl Eq for AddrParseError[src]

impl Eq for Ipv4Addr[src]

impl Eq for Ipv6Addr[src]

impl Eq for SocketAddrV4[src]

impl Eq for SocketAddrV6[src]

impl Eq for NonZeroI128[src]

impl Eq for NonZeroI16[src]

impl Eq for NonZeroI32[src]

impl Eq for NonZeroI64[src]

impl Eq for NonZeroI8[src]

impl Eq for NonZeroIsize[src]

impl Eq for NonZeroU128[src]

impl Eq for NonZeroU16[src]

impl Eq for NonZeroU32[src]

impl Eq for NonZeroU64[src]

impl Eq for NonZeroU8[src]

impl Eq for NonZeroUsize[src]

impl Eq for ParseFloatError[src]

impl Eq for ParseIntError[src]

impl Eq for TryFromIntError[src]

impl Eq for RangeFull[src]

impl Eq for NoneError[src]

impl Eq for Path[src]

impl Eq for PathBuf[src]

impl Eq for StripPrefixError[src]

impl Eq for ExitStatus[src]

impl Eq for Output[src]

impl Eq for ParseBoolError[src]

impl Eq for Utf8Error[src]

impl Eq for String[src]

impl Eq for RecvError[src]

impl Eq for WaitTimeoutResult[src]

impl Eq for ThreadId[src]

impl Eq for Duration[src]

impl Eq for Instant[src]

impl Eq for SystemTime[src]

impl<'_> Eq for Components<'_>[src]

impl<'_, A> Eq for &'_ A where
    A: Eq + ?Sized, [src]

impl<'_, A> Eq for &'_ mut A where
    A: Eq + ?Sized, [src]

impl<'_, B> Eq for Cow<'_, B> where
    B: Eq + ToOwned + ?Sized, [src]

impl<'a> Eq for Component<'a>[src]

impl<'a> Eq for Prefix<'a>[src]

impl<'a> Eq for PrefixComponent<'a>[src]

impl<A> Eq for (A,) where
    A: Eq + ?Sized, [src]

impl<A> Eq for VecDeque<A> where
    A: Eq, [src]

impl<A, B> Eq for (A, B) where
    A: Eq,
    B: Eq + ?Sized, [src]

impl<A, B, C> Eq for (A, B, C) where
    A: Eq,
    B: Eq,
    C: Eq + ?Sized, [src]

impl<A, B, C, D> Eq for (A, B, C, D) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq + ?Sized, [src]

impl<A, B, C, D, E> Eq for (A, B, C, D, E) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq + ?Sized, [src]

impl<A, B, C, D, E, F> Eq for (A, B, C, D, E, F) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G> Eq for (A, B, C, D, E, F, G) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G, H> Eq for (A, B, C, D, E, F, G, H) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq,
    H: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G, H, I> Eq for (A, B, C, D, E, F, G, H, I) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq,
    H: Eq,
    I: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G, H, I, J> Eq for (A, B, C, D, E, F, G, H, I, J) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq,
    H: Eq,
    I: Eq,
    J: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G, H, I, J, K> Eq for (A, B, C, D, E, F, G, H, I, J, K) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq,
    H: Eq,
    I: Eq,
    J: Eq,
    K: Eq + ?Sized, [src]

impl<A, B, C, D, E, F, G, H, I, J, K, L> Eq for (A, B, C, D, E, F, G, H, I, J, K, L) where
    A: Eq,
    B: Eq,
    C: Eq,
    D: Eq,
    E: Eq,
    F: Eq,
    G: Eq,
    H: Eq,
    I: Eq,
    J: Eq,
    K: Eq,
    L: Eq + ?Sized, [src]

impl<H> Eq for BuildHasherDefault<H>[src]

impl<Idx> Eq for Range<Idx> where
    Idx: Eq, [src]

impl<Idx> Eq for RangeFrom<Idx> where
    Idx: Eq, [src]

impl<Idx> Eq for RangeInclusive<Idx> where
    Idx: Eq, [src]

impl<Idx> Eq for RangeTo<Idx> where
    Idx: Eq, [src]

impl<Idx> Eq for RangeToInclusive<Idx> where
    Idx: Eq, [src]

impl<K, V> Eq for BTreeMap<K, V> where
    K: Eq,
    V: Eq, [src]

impl<K, V, S> Eq for std::collections::HashMap<K, V, S> where
    K: Eq + Hash,
    V: Eq,
    S: BuildHasher, [src]

impl<P> Eq for Pin<P> where
    P: Eq, [src]

impl<Ret> Eq for fn() -> Ret[src]

impl<Ret> Eq for extern "C" fn() -> Ret[src]

impl<Ret> Eq for unsafe fn() -> Ret[src]

impl<Ret> Eq for unsafe extern "C" fn() -> Ret[src]

impl<Ret, A> Eq for fn(A) -> Ret[src]

impl<Ret, A> Eq for extern "C" fn(A) -> Ret[src]

impl<Ret, A> Eq for extern "C" fn(A, VaList) -> Ret[src]

impl<Ret, A> Eq for unsafe fn(A) -> Ret[src]

impl<Ret, A> Eq for unsafe extern "C" fn(A) -> Ret[src]

impl<Ret, A> Eq for unsafe extern "C" fn(A, VaList) -> Ret[src]

impl<Ret, A, B> Eq for fn(A, B) -> Ret[src]

impl<Ret, A, B> Eq for extern "C" fn(A, B) -> Ret[src]

impl<Ret, A, B> Eq for extern "C" fn(A, B, VaList) -> Ret[src]

impl<Ret, A, B> Eq for unsafe fn(A, B) -> Ret[src]

impl<Ret, A, B> Eq for unsafe extern "C" fn(A, B) -> Ret[src]

impl<Ret, A, B> Eq for unsafe extern "C" fn(A, B, VaList) -> Ret[src]

impl<Ret, A, B, C> Eq for fn(A, B, C) -> Ret[src]

impl<Ret, A, B, C> Eq for extern "C" fn(A, B, C) -> Ret[src]

impl<Ret, A, B, C> Eq for extern "C" fn(A, B, C, VaList) -> Ret[src]

impl<Ret, A, B, C> Eq for unsafe fn(A, B, C) -> Ret[src]

impl<Ret, A, B, C> Eq for unsafe extern "C" fn(A, B, C) -> Ret[src]

impl<Ret, A, B, C> Eq for unsafe extern "C" fn(A, B, C, VaList) -> Ret[src]

impl<Ret, A, B, C, D> Eq for fn(A, B, C, D) -> Ret[src]

impl<Ret, A, B, C, D> Eq for extern "C" fn(A, B, C, D) -> Ret[src]

impl<Ret, A, B, C, D> Eq for extern "C" fn(A, B, C, D, VaList) -> Ret[src]

impl<Ret, A, B, C, D> Eq for unsafe fn(A, B, C, D) -> Ret[src]

impl<Ret, A, B, C, D> Eq for unsafe extern "C" fn(A, B, C, D) -> Ret[src]

impl<Ret, A, B, C, D> Eq for unsafe extern "C" fn(A, B, C, D, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for fn(A, B, C, D, E) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for extern "C" fn(A, B, C, D, E) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for extern "C" fn(A, B, C, D, E, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for unsafe fn(A, B, C, D, E) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for unsafe extern "C" fn(A, B, C, D, E) -> Ret[src]

impl<Ret, A, B, C, D, E> Eq for unsafe extern "C" fn(A, B, C, D, E, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for fn(A, B, C, D, E, F) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for extern "C" fn(A, B, C, D, E, F) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for extern "C" fn(A, B, C, D, E, F, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for unsafe fn(A, B, C, D, E, F) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for unsafe extern "C" fn(A, B, C, D, E, F) -> Ret[src]

impl<Ret, A, B, C, D, E, F> Eq for unsafe extern "C" fn(A, B, C, D, E, F, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for fn(A, B, C, D, E, F, G) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for extern "C" fn(A, B, C, D, E, F, G) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for extern "C" fn(A, B, C, D, E, F, G, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for unsafe fn(A, B, C, D, E, F, G) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for fn(A, B, C, D, E, F, G, H) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for extern "C" fn(A, B, C, D, E, F, G, H) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for extern "C" fn(A, B, C, D, E, F, G, H, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for unsafe fn(A, B, C, D, E, F, G, H) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for fn(A, B, C, D, E, F, G, H, I) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for fn(A, B, C, D, E, F, G, H, I, J) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, VaList) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, VaList) -> Ret[src]

impl<T> Eq for Bound<T> where
    T: Eq, [src]

impl<T> Eq for Option<T> where
    T: Eq, [src]

impl<T> Eq for Poll<T> where
    T: Eq, [src]

impl<T> Eq for [T; 0] where
    T: Eq, [src]

impl<T> Eq for [T; 1] where
    T: Eq, [src]

impl<T> Eq for [T; 2] where
    T: Eq, [src]

impl<T> Eq for [T; 3] where
    T: Eq, [src]

impl<T> Eq for [T; 4] where
    T: Eq, [src]

impl<T> Eq for [T; 5] where
    T: Eq, [src]

impl<T> Eq for [T; 6] where
    T: Eq, [src]

impl<T> Eq for [T; 7] where
    T: Eq, [src]

impl<T> Eq for [T; 8] where
    T: Eq, [src]

impl<T> Eq for [T; 9] where
    T: Eq, [src]

impl<T> Eq for [T; 10] where
    T: Eq, [src]

impl<T> Eq for [T; 11] where
    T: Eq, [src]

impl<T> Eq for [T; 12] where
    T: Eq, [src]

impl<T> Eq for [T; 13] where
    T: Eq, [src]

impl<T> Eq for [T; 14] where
    T: Eq, [src]

impl<T> Eq for [T; 15] where
    T: Eq, [src]

impl<T> Eq for [T; 16] where
    T: Eq, [src]

impl<T> Eq for [T; 17] where
    T: Eq, [src]

impl<T> Eq for [T; 18] where
    T: Eq, [src]

impl<T> Eq for [T; 19] where
    T: Eq, [src]

impl<T> Eq for [T; 20] where
    T: Eq, [src]

impl<T> Eq for [T; 21] where
    T: Eq, [src]

impl<T> Eq for [T; 22] where
    T: Eq, [src]

impl<T> Eq for [T; 23] where
    T: Eq, [src]

impl<T> Eq for [T; 24] where
    T: Eq, [src]

impl<T> Eq for [T; 25] where
    T: Eq, [src]

impl<T> Eq for [T; 26] where
    T: Eq, [src]

impl<T> Eq for [T; 27] where
    T: Eq, [src]

impl<T> Eq for [T; 28] where
    T: Eq, [src]

impl<T> Eq for [T; 29] where
    T: Eq, [src]

impl<T> Eq for [T; 30] where
    T: Eq, [src]

impl<T> Eq for [T; 31] where
    T: Eq, [src]

impl<T> Eq for [T; 32] where
    T: Eq, [src]

impl<T> Eq for *const T where
    T: ?Sized, [src]

impl<T> Eq for *mut T where
    T: ?Sized, [src]

impl<T> Eq for [T] where
    T: Eq, [src]

impl<T> Eq for Box<T> where
    T: Eq + ?Sized, [src]

impl<T> Eq for Cell<T> where
    T: Copy + Eq, [src]

impl<T> Eq for RefCell<T> where
    T: Eq + ?Sized, [src]

impl<T> Eq for Reverse<T> where
    T: Eq, [src]

impl<T> Eq for BTreeSet<T> where
    T: Eq, [src]

impl<T> Eq for LinkedList<T> where
    T: Eq, [src]

impl<T> Eq for PhantomData<T> where
    T: ?Sized, [src]

impl<T> Eq for Discriminant<T>[src]

impl<T> Eq for ManuallyDrop<T> where
    T: Eq + ?Sized, [src]

impl<T> Eq for Wrapping<T> where
    T: Eq, [src]

impl<T> Eq for NonNull<T> where
    T: ?Sized, [src]

impl<T> Eq for Rc<T> where
    T: Eq + ?Sized, [src]

impl<T> Eq for Arc<T> where
    T: Eq + ?Sized, [src]

impl<T> Eq for Vec<T> where
    T: Eq, [src]

impl<T, E> Eq for Result<T, E> where
    E: Eq,
    T: Eq, [src]

impl<T, S> Eq for std::collections::HashSet<T, S> where
    T: Eq + Hash,
    S: BuildHasher, [src]

impl<T: Eq> Eq for TrySendError<T>[src]

impl<T: Eq> Eq for SendError<T>[src]

impl<Y, R> Eq for GeneratorState<Y, R> where
    R: Eq,
    Y: Eq, [src]

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