1.0.0[][src]Trait core::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

Implementors

impl Eq for ![src]

impl Eq for ()[src]

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

impl Eq for Infallible[src]

impl Eq for FpCategory[src]

impl Eq for IntErrorKind[src]

impl Eq for SearchStep[src]

impl Eq for core::sync::atomic::Ordering[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 CpuidResult[src]

impl Eq for CharTryFromError[src]

impl Eq for DecodeUtf16Error[src]

impl Eq for ParseCharError[src]

impl Eq for UnicodeVersion[src]

impl Eq for Error[src]

impl Eq for PhantomPinned[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 ParseBoolError[src]

impl Eq for Utf8Error[src]

impl Eq for Duration[src]

impl Eq for bool[src]

impl Eq for char[src]

impl Eq for i8[src]

impl Eq for i16[src]

impl Eq for i32[src]

impl Eq for i64[src]

impl Eq for i128[src]

impl Eq for isize[src]

impl Eq for str[src]

impl Eq for u8[src]

impl Eq for u16[src]

impl Eq for u32[src]

impl Eq for u64[src]

impl Eq for u128[src]

impl Eq for usize[src]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<Idx: Eq> Eq for Range<Idx>[src]

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

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

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

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

impl<P: Eq> Eq for Pin<P>[src]

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

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

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

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

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

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

impl<Ret, A> Eq for 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, _: ...) -> Ret[src]

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

impl<Ret, A, B> Eq for 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, _: ...) -> Ret[src]

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

impl<Ret, A, B, C> Eq for 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, _: ...) -> Ret[src]

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

impl<Ret, A, B, C, D> Eq for unsafe fn(_: A, _: B, _: C, _: D) -> 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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, 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, _: ...) -> 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 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, _: ...) -> 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<T> Eq for Discriminant<T>[src]

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

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

impl<T: Eq> Eq for Bound<T>[src]

impl<T: Eq> Eq for Option<T>[src]

impl<T: Eq> Eq for Poll<T>[src]

impl<T: Eq> Eq for Reverse<T>[src]

impl<T: Eq> Eq for Wrapping<T>[src]

impl<T: Eq> Eq for [T; 0][src]

impl<T: Eq> Eq for [T; 1][src]

impl<T: Eq> Eq for [T; 2][src]

impl<T: Eq> Eq for [T; 3][src]

impl<T: Eq> Eq for [T; 4][src]

impl<T: Eq> Eq for [T; 5][src]

impl<T: Eq> Eq for [T; 6][src]

impl<T: Eq> Eq for [T; 7][src]

impl<T: Eq> Eq for [T; 8][src]

impl<T: Eq> Eq for [T; 9][src]

impl<T: Eq> Eq for [T; 10][src]

impl<T: Eq> Eq for [T; 11][src]

impl<T: Eq> Eq for [T; 12][src]

impl<T: Eq> Eq for [T; 13][src]

impl<T: Eq> Eq for [T; 14][src]

impl<T: Eq> Eq for [T; 15][src]

impl<T: Eq> Eq for [T; 16][src]

impl<T: Eq> Eq for [T; 17][src]

impl<T: Eq> Eq for [T; 18][src]

impl<T: Eq> Eq for [T; 19][src]

impl<T: Eq> Eq for [T; 20][src]

impl<T: Eq> Eq for [T; 21][src]

impl<T: Eq> Eq for [T; 22][src]

impl<T: Eq> Eq for [T; 23][src]

impl<T: Eq> Eq for [T; 24][src]

impl<T: Eq> Eq for [T; 25][src]

impl<T: Eq> Eq for [T; 26][src]

impl<T: Eq> Eq for [T; 27][src]

impl<T: Eq> Eq for [T; 28][src]

impl<T: Eq> Eq for [T; 29][src]

impl<T: Eq> Eq for [T; 30][src]

impl<T: Eq> Eq for [T; 31][src]

impl<T: Eq> Eq for [T; 32][src]

impl<T: Eq> Eq for [T][src]

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

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

impl<T: ?Sized> Eq for *const T[src]

impl<T: ?Sized> Eq for *mut T[src]

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

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

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

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