Trait sgx_tstd::cmp::Eq

pub trait Eq: PartialEq { }

Trait for comparisons corresponding to equivalence relations.

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

• reflexive: a == a;
• symmetric: a == b implies b == a (required by PartialEq as well); and
• transitive: a == b and b == c implies a == c (required by PartialEq as well).

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

Violating this property is a logic error. The behavior resulting from a logic error is not specified, but users of the trait must ensure that such logic errors do not result in undefined behavior. This means that unsafe code must not rely on the correctness of these methods.

Implement Eq in addition to PartialEq if it’s guaranteed that PartialEq::eq(a, a) always returns true (reflexivity), in addition to the symmetric and transitive properties already required by PartialEq.

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 {}

Object Safety

This trait is not object safe.

Implementors

impl Eq for hashbrown_tstd::TryReserveError

impl Eq for OCallError

impl Eq for AddressKind

impl Eq for MapAddr

impl Eq for FutexClockId

impl Eq for FutexOp

impl Eq for PageType

impl Eq for Feature

impl Eq for Version

impl Eq for ExceptionType

impl Eq for ExceptionVector

impl Eq for HandleResult

impl Eq for PceError

impl Eq for QcnlError

impl Eq for Quote3Error

impl Eq for SgxStatus

impl Eq for DirIndex

impl Eq for EcResult

impl Eq for RsaKeyType

impl Eq for RsaResult

impl Eq for PckCertFlag

impl Eq for ProdType

impl Eq for QeType

impl Eq for QlAttestationAlgorithmId

impl Eq for QlCertKeyType

impl Eq for QlConfigVersion

impl Eq for QlLogLevel

impl Eq for QlPathType

impl Eq for QlQvResult

impl Eq for QlRequestPolicy

impl Eq for QvPathType

impl Eq for DhSessionRole

impl Eq for EnclaveMode

impl Eq for KeyName

impl Eq for ProtectPerm

impl Eq for RaKeyType

impl Eq for QuoteSignType

impl Eq for SwitchlessWokerEvent

impl Eq for SwitchlessWokerType

impl Eq for SgxDeviceStatus

impl Eq for AsciiChar

impl Eq for TryReserveErrorKind

impl Eq for Infallible

impl Eq for VarError

impl Eq for sgx_tstd::fmt::Alignment

impl Eq for ErrorKind

impl Eq for SeekFrom

impl Eq for IpAddr

impl Eq for Ipv6MulticastScope

impl Eq for Shutdown

impl Eq for SocketAddr

impl Eq for FpCategory

impl Eq for IntErrorKind

impl Eq for SearchStep

impl Eq for sgx_tstd::sync::atomic::Ordering

impl Eq for TcsPolicy

impl Eq for sgx_tstd::cmp::Ordering

impl Eq for Which

impl Eq for bool

impl Eq for char

impl Eq for i8

impl Eq for i16

impl Eq for i32

impl Eq for i64

impl Eq for i128

impl Eq for isize

impl Eq for !

impl Eq for str

impl Eq for u8

impl Eq for u16

impl Eq for u32

impl Eq for u64

impl Eq for u128

impl Eq for ()

impl Eq for usize

impl Eq for AlighAllocErr

impl Eq for AlignLayout

impl Eq for AlignLayoutErr

impl Eq for AlignReq

impl Eq for sgx_oc::linux::ocall::cpuid::CpuidResult

impl Eq for MsgHdrFlags

impl Eq for RsrvMemAllocErr

impl Eq for FutexFlags

impl Eq for Timespec

impl Eq for PageFlags

impl Eq for PageInfo

impl Eq for PageRange

impl Eq for TcsId

impl Eq for Handle

impl Eq for AlignEc256PrivateKey

impl Eq for AlignEc256SharedKey

impl Eq for AlignKey128bit

impl Eq for AlignKey256bit

impl Eq for AlignMac128bit

impl Eq for AlignMac256bit

impl Eq for Ec256PrivateKey

impl Eq for Ec256PublicKey

impl Eq for Ec256SharedKey

impl Eq for Ec256Signature

impl Eq for Rsa2048Key

impl Eq for Rsa2048Param

impl Eq for Rsa2048PrivKey

impl Eq for Rsa2048PubKey

impl Eq for Rsa2048Signature

impl Eq for Rsa3072Key

impl Eq for Rsa3072Param

impl Eq for Rsa3072PrivKey

impl Eq for Rsa3072PubKey

impl Eq for Rsa3072Signature

impl Eq for Sha1Hash

impl Eq for Sha256Hash

impl Eq for Sha384Hash

impl Eq for Sm3Hash

impl Eq for PceInfo

impl Eq for QlQe3Id

impl Eq for QuoteHeader

impl Eq for AttKeyId

impl Eq for BaseName

impl Eq for QuoteNonce

impl Eq for Spid

impl Eq for UpdateInfoBit

impl Eq for EnclaveIdentity

impl Eq for timespec

impl Eq for TeeAttributes

impl Eq for TeeCpuSvn

impl Eq for TeeMeasurement

impl Eq for TeeReportType

impl Eq for Attributes

impl Eq for AttributesFlags

impl Eq for CpuSvn

impl Eq for KeyId

impl Eq for KeyPolicy

impl Eq for Measurement

impl Eq for MiscAttribute

impl Eq for MiscSelect

impl Eq for SwitchlessWokerStats

impl Eq for Quote4Header

impl Eq for TeeTcbSvn

impl Eq for AllocError

impl Eq for Layout

impl Eq for LayoutError

impl Eq for TypeId

impl Eq for CharTryFromError

impl Eq for DecodeUtf16Error

impl Eq for ParseCharError

impl Eq for TryFromCharError

impl Eq for sgx_tstd::collections::TryReserveError

impl Eq for CStr

impl Eq for CString

impl Eq for FromBytesUntilNulError

impl Eq for FromBytesWithNulError

impl Eq for FromVecWithNulError

impl Eq for IntoStringError

impl Eq for NulError

impl Eq for OsStr

impl Eq for OsString

impl Eq for Error

impl Eq for PhantomPinned

impl Eq for Assume

impl Eq for AddrParseError

impl Eq for Ipv4Addr

impl Eq for Ipv6Addr

impl Eq for SocketAddrV4

impl Eq for SocketAddrV6

impl Eq for NonZeroI8

impl Eq for NonZeroI16

impl Eq for NonZeroI32

impl Eq for NonZeroI64

impl Eq for NonZeroI128

impl Eq for NonZeroIsize

impl Eq for NonZeroU8

impl Eq for NonZeroU16

impl Eq for NonZeroU32

impl Eq for NonZeroU64

impl Eq for NonZeroU128

impl Eq for NonZeroUsize

impl Eq for ParseFloatError

impl Eq for ParseIntError

impl Eq for TryFromIntError

impl Eq for RangeFull

impl Eq for Components<'_>

impl Eq for Path

impl Eq for PathBuf

impl Eq for StripPrefixError

impl Eq for sgx_tstd::ptr::Alignment

impl Eq for ParseBoolError

impl Eq for Utf8Error

impl Eq for FromUtf8Error

impl Eq for String

impl Eq for WaitTimeoutResult

impl Eq for ThreadId

impl Eq for Duration

impl Eq for Instant

impl Eq for SystemTime

impl Eq for TryFromFloatSecsError

impl Eq for FileType

impl Eq for Permissions

impl Eq for core::core_arch::x86::cpuid::CpuidResult

impl<'a> Eq for Component<'a>

impl<'a> Eq for Prefix<'a>

impl<'a> Eq for ThreadControl<'a>

impl<'a> Eq for Location<'a>

impl<'a> Eq for PrefixComponent<'a>

impl<'a> Eq for Utf8Chunk<'a>

impl<A> Eq for &Awhere A: Eq + ?Sized,

impl<A> Eq for &mut Awhere A: Eq + ?Sized,

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

impl<B, C> Eq for ControlFlow<B, C>where B: Eq, C: Eq,

impl<Dyn> Eq for DynMetadata<Dyn>where Dyn: ?Sized,

impl<F> Eq for Fwhere F: FnPtr,

impl<H> Eq for BuildHasherDefault<H>

impl<Idx> Eq for Range<Idx>where Idx: Eq,

impl<Idx> Eq for RangeFrom<Idx>where Idx: Eq,

impl<Idx> Eq for RangeInclusive<Idx>where Idx: Eq,

impl<Idx> Eq for RangeTo<Idx>where Idx: Eq,

impl<Idx> Eq for RangeToInclusive<Idx>where Idx: Eq,

impl<K, V, A> Eq for BTreeMap<K, V, A>where K: Eq, V: Eq, A: Allocator + Clone,

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

impl<K, V, S, A> Eq for hashbrown_tstd::map::HashMap<K, V, S, A>where K: Eq + Hash, V: Eq, S: BuildHasher, A: Allocator,

impl<P> Eq for Pin<P>where P: Deref, <P as Deref>::Target: Eq,

impl<T> Eq for Bound<T>where T: Eq,

impl<T> Eq for Option<T>where T: Eq,

impl<T> Eq for Poll<T>where T: Eq,

impl<T> Eq for *const Twhere T: ?Sized,

impl<T> Eq for *mut Twhere T: ?Sized,

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

impl<T> Eq for (T₁, T₂, …, Tₙ)where T: Eq + ?Sized,

This trait is implemented for tuples up to twelve items long.

impl<T> Eq for sgx_sync::once_lock::OnceLock<T>where T: Eq,

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

impl<T> Eq for OnceCell<T>where T: Eq,

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

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

impl<T> Eq for Discriminant<T>

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

impl<T> Eq for Wrapping<T>where T: Eq,

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

impl<T> Eq for Saturating<T>where T: Eq,

impl<T> Eq for Reverse<T>where T: Eq,

impl<T, A> Eq for Box<T, A>where T: Eq + ?Sized, A: Allocator,

impl<T, A> Eq for BTreeSet<T, A>where T: Eq, A: Allocator + Clone,

impl<T, A> Eq for LinkedList<T, A>where T: Eq, A: Allocator,

impl<T, A> Eq for VecDeque<T, A>where T: Eq, A: Allocator,

impl<T, A> Eq for Rc<T, A>where T: Eq + ?Sized, A: Allocator,

impl<T, A> Eq for Arc<T, A>where T: Eq + ?Sized, A: Allocator,

impl<T, A> Eq for Vec<T, A>where T: Eq, A: Allocator,

impl<T, E> Eq for Result<T, E>where T: Eq, E: Eq,

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

impl<T, S, A> Eq for hashbrown_tstd::set::HashSet<T, S, A>where T: Eq + Hash, S: BuildHasher, A: Allocator,

impl<T, const N: usize> Eq for [T; N]where T: Eq,

impl<T, const N: usize> Eq for Simd<T, N>where LaneCount<N>: SupportedLaneCount, T: SimdElement + Eq,

impl<T: Eq> Eq for Cursor<T>

impl<T: Eq> Eq for sgx_tstd::sync::OnceLock<T>

impl<Y, R> Eq for CoroutineState<Y, R>where Y: Eq, R: Eq,